CN218099912U - Light source device and projection system - Google Patents

Abstract

The utility model discloses a light source device and projection system, including first LED light source, second LED light source, third LED light source and at least one laser light source. The brightness of the laser light source is larger than that of the LED light source, the laser light source is added in a three-color LED light source system, the emergent light of the laser light source is combined with the emergent light of the LED light source with the same color and then combined with the LED light sources with other colors, and the emergent light brightness of the light source device can be increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by adding the laser light sources in an original LED light source system.

Description

Light source device and projection system

Technical Field

The utility model relates to a projection display technology field especially relates to a light source device and projection system.

Background

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibition, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment and the like, and the advantages of large display screen size, clear display and the like are also suitable for the requirement of large-screen display.

The Light Emitting Diode (LED) has the advantages of fast response, low power consumption, long service life and the like, and the application of the LED to a projection system can change the complex optical path structure of the original Light source; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

However, the current LED light source projection system still has a problem of low brightness due to the loss of light energy in the projection process, and cannot further improve the color of the color picture and increase the color gamut.

SUMMERY OF THE UTILITY MODEL

In some embodiments of the present invention, the light source device includes: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and at least one laser light source. The light source device is provided with two light combination assemblies, the first light combination assembly is positioned at the intersection of emergent light of the first LED light source and emergent light of the laser light source, and the first light combination assembly is used for combining emergent light of the first LED light source and emergent light of the laser light source; the second light combination assembly is located at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the first light combination assembly, and the second light combination assembly is used for combining the emergent light of the first light combination assembly, the emergent light of the second LED light source and the emergent light of the third LED light source. The brightness of the laser light source is larger than that of the LED light source, the laser light source is added in a three-color LED light source system, the emergent light of the laser light source is combined with the emergent light of the LED light source with the same color and then combined with the LED light sources with other colors, and the emergent light brightness of the light source device can be increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by adding the laser light sources in an original LED light source system.

In some embodiments of the present invention, the light source device further includes: and a fourth LED light source. The fourth LED light source is used for irradiating and exciting the second LED light source to emit light of a second wave band. The fourth LED light source can emit light of a third wavelength band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wavelength band.

The utility model discloses some embodiments, first LED light source adopts ruddiness LED, and the second LED light source adopts green glow LED, and third LED light source and fourth LED light source adopt blue light LED. The laser light source adopts a red light laser chip or a red light laser.

In some embodiments of the utility model, the second closes optical assembly and includes: the first light-combining mirror and the second light-combining mirror. The first light combining mirror is positioned at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the fourth LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the second wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the emergent light of the first light combining component, and the second light combining mirror is used for transmitting the light of the first wave band and reflecting the light of the second wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can both adopt dichroic mirrors.

In some embodiments of the present invention, two or more laser light sources may be provided in the light source device to increase the laser intensity. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

In some embodiments of the present invention, the first light combining component includes: a mirror. The reflector is arranged on the second light combining mirror. The laser emitted by the laser source firstly enters the reflector and is reflected to the second light combining mirror by the reflector, and the emergent light of the first LED light source directly emits to the second light combining mirror, so that the emergent light of the first LED light source and the laser emitted by the laser source are combined.

The utility model discloses in some embodiments, the laser facula that the laser light source was sent out the speculum is symmetrical about the central point of speculum, and the central point of speculum and the line of the central point of second closed light mirror are on a parallel with the light emitting direction of first LED light source, can make the laser of speculum reflection incide to the central point that the second closed the light mirror like this, and the laser facula that incides the second closed the light mirror closes the central point symmetry of light mirror for the second. The emergent light of the first LED light source is incident to the central point of the second light combining mirror, so that the light spot incident to the second light combining mirror is symmetrical relative to the central point of the second light combining mirror, and the laser light spot is positioned in the center of the light combining light spot, so that the energy distribution of the light combining light spot is more uniform. Because the reflector arranged on the second light combining mirror can shield part of emergent light of the first LED light source, the size of the reflector is set to be as small as possible so as to completely receive laser beams emitted by the laser light source. Because the laser has larger energy relative to the emergent light of the LED, the shielded part of the emergent light of the first LED light source can be compensated by the laser, and larger light loss can not be caused.

In some embodiments of the present invention, the first light combining component includes: and a third light-combining mirror. The third light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the laser light source. The emergent light of the first LED light source and the emergent light of the laser light source are the same in color, and the first waveband covers the fourth waveband. Therefore, the third light combining mirror may adopt a dichroic mirror for reflecting the light of the fourth wavelength band and transmitting the light of the first wavelength band except the fourth wavelength band. After light of a fourth wave band emitted by the laser light source enters the third light combining mirror, the light is reflected towards the second light combining mirror by the third light combining mirror; after the light of the first wavelength band emitted by the first LED light source enters the third light combining mirror, the light of the fourth wavelength band in the first wavelength band is reflected by the third light combining mirror, and the light except the fourth wavelength band in the first wavelength band is transmitted by the third light combining mirror, so that the light of the fourth wavelength band emitted by the laser light source is combined with the light except the fourth wavelength band in the first wavelength band emitted by the first LED light source.

The utility model discloses some embodiments, the line of the central point of third beam combiner and the central point of second beam combiner is on a parallel with the light outgoing direction of first LED light source, perpendicular to laser light source's light outgoing direction. The laser light source and the first LED light source emit light to the central point of the third light combining mirror, so that laser spots of the laser light source, which are incident on the third light combining mirror, and spots of the first LED light source, which are incident on the third light combining mirror, are symmetrical relative to the central point of the third light combining mirror, and the laser spots are positioned in the center of the light combining spots, so that the energy distribution of the light combining spots is more uniform. Since the laser has a larger energy relative to the light emitted from the LED, the energy of the light in the fourth wavelength band reflected by the third light combining mirror from the first LED light source is smaller than that of the laser, and the generated light loss is smaller.

In some embodiments of the present invention, the first light combining component includes: a light-transmitting mirror. The light-transmitting mirror is positioned between the first LED light source and the second light combining mirror; and a reflecting layer is arranged on the partial surface of one side of the light-transmitting mirror, which deviates from the first LED light source. The laser emitted by the laser source is incident to the reflecting layer and is reflected to the second light combining mirror by the reflecting layer, and the emergent light of the first LED light source directly penetrates through the light transmitting mirror and is emitted to the second light combining mirror, so that the emergent light of the first LED light source and the laser emitted by the laser source are combined.

The utility model discloses in some embodiments, the reflector layer is located the central point of printing opacity mirror and puts, and the central point of printing opacity mirror and the line that the central point of second closed the light mirror are on a parallel with the light outgoing direction of first LED light source, perpendicular to laser light source's light outgoing direction. The laser facula that the laser light source is emergent to the reflector layer is symmetrical about the central point of reflector layer, and the facula that first LED light source incides on the printing opacity mirror is symmetrical for the central point of printing opacity mirror. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform. The reflective layer can shield part of emergent light of the first LED light source, the size of the reflective layer is set to be as small as possible, the area of the reflective layer is smaller than or equal to 1/10 of the area of an emergent light spot of the first LED light source, and therefore the energy loss of the emergent light of the first LED light source caused by shielding of the reflective layer is controlled to be below 10%. Because the laser has larger energy relative to the emergent light of the LED, the shielded emergent light of the first LED light source can be compensated by the laser, and larger light loss can not be caused.

In some embodiments of the present invention, the light source device further includes: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned on the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

The utility model discloses in some embodiments, the light source device still includes: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent lights of the LED light sources before being combined are different, the emergent lights of the LED light sources have a certain divergence angle, the light path of the second LED light source and the second LED light source before being incident on the second light combining mirror is longer relative to the light path of the first LED light source, and the light spot size after being dispersed is larger as the light path is longer, the combined light of the second LED light source and the second LED light source needs to be condensed by the beam condensing lens group before being incident on the second light combining mirror, so that the combined light spot of the second LED light source and the second LED light source is the same as possible as the light spot size of the first LED light source.

In some embodiments of the present invention, the light source device further includes: and a light uniformizing part. The dodging component is positioned on the light emitting side of the second light combining mirror. The dodging component is arranged on the light emitting side of the second light combining mirror, light beams of different LED light sources and laser light sources can be further dodged, only one dodging component needs to be arranged in the light source device, and the dodging component does not need to be arranged on different light sources respectively, so that the structure of the light source device is simplified, and the size of the light source device is reduced.

In some embodiments of the present invention, the projection system includes any one of the above-mentioned light source devices, an illumination light path, a light valve modulation component and a projection lens. The light source device comprises a light source device, a light valve modulation component, a projection lens and a light source device, wherein the light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the light path, and the projection lens is positioned on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a light source device in the related art;

fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 3 is a second schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 4 is a third schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 5 is a fourth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 6 is a fifth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 7 is a sixth schematic view of a light source device according to an embodiment of the present invention;

fig. 8 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 9 is an eighth schematic structural view of a light source device according to an embodiment of the present invention;

fig. 10 is a ninth schematic view illustrating a structure of a light source device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

The LED light source comprises 11-a first LED light source, 12-a second LED light source, 13-a third LED light source, 14-a fourth LED light source, an L-laser light source, 2' -a first light combination component, 2-a second light combination component, 21-a first light combination lens, 22-a second light combination lens, 23-a reflector, 24-a third light combination lens, 25-a light transmission layer, an f-reflection layer, 31-a first collimating lens group, 32-a second collimating lens group, 33-a third collimating lens group, 34-a fourth collimating lens group, 35-a converging lens group, 4-a beam shrinking lens group, 5-a light homogenizing component, 100-a light source device, 200-an illumination light path, 300-a light valve modulation component and 400-a projection lens.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but the changes can be made as required, and the changes are all included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship and do not represent true proportions.

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space.

Projection light sources, which are important components in projection systems, determine display brightness and gamut range. The Light Emitting Diode (LED) has the advantages of fast response, low power consumption, long service life and the like, and the complex Light path structure of the original Light source can be changed by using the LED as the Light source of the projection system; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

In order to realize a full-color display, a light source device is generally required to be provided with a light source capable of emitting light of three primary colors, and in a light source device having LEDs as light sources, a first LED light source for emitting red light, a second LED light source for emitting green light, and a third LED light source for emitting blue light may be provided at the same time.

Fig. 1 is a schematic structural diagram of a light source device in the related art.

As shown in fig. 1, the red light a emitted from the first LED light source 11, the green light b emitted from the second LED light source 12, and the blue light c emitted from the third LED light source 13 are combined and emitted. Thereby enabling the projection light source to emit tricolor light.

However, due to the loss of light energy in the projection process, the current projection system using the LED light source still has the problem of low brightness, and due to the limited color gamut of the LED, the color of the color picture cannot be further improved, and the color gamut cannot be increased.

Therefore, the embodiment of the utility model provides an increased laser source on LED light source system's basis for improve light source device's luminance, be favorable to further promoting the colour gamut scope, optimize projection system's color performance ability.

Fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 2, the embodiment of the present invention provides a light source device including: a first LED light source 11, a second LED light source 12 and a third LED light source 13. The first LED light source 11 emits light of a first wavelength band, the second LED light source 12 emits light of a second wavelength band, and the third LED light source 13 emits light of a third wavelength band. The embodiment of the present invention provides a light of the first wavelength band can be red light, a light of the second wavelength band can be green light, and a light of the third wavelength band can be blue light, which is not limited herein.

The light source device further comprises at least one laser light source L, and the laser light source L emits laser light of a fourth wave band. The half-peak width of the laser is narrow and has a high energy at the peak wavelength, while the LED light source emits light with a small energy and covers a wide wavelength band compared to the laser light source. In the embodiment of the present invention, the first LED light source 11 emits light with the same color as the laser light source L, and the first wavelength band emitted from the first LED light source 11 covers the fourth wavelength band emitted from the laser light source L. The light of the fourth wavelength band emitted from the laser light source L may be red light.

As shown in fig. 2, the light source device further includes: a first light combining component 2' and a light combining component 2.

The first light combining component 2 'is located at a junction of the emergent light of the first LED light source 11 and the emergent light of the laser light source, and the first light combining component 2' is configured to combine the light a of the first wavelength band emitted by the first LED light source 11 and the light d of the fourth wavelength band emitted by the laser light source L.

The second light combining component 2 is located at an intersection of the emergent light of the first light combining component 2', the emergent light of the second LED light source 12 and the emergent light of the third LED light source 13, and the second light combining component 2 is configured to combine the light a of the first wavelength band and the light d of the fourth wavelength band emitted by the first light combining component 2', the light b of the second wavelength band emitted by the second LED light source 12 and the light c of the third wavelength band emitted by the third LED light source 13.

The brightness of the laser light source is larger than that of the LED light source, the laser light source is added in a three-color LED light source system, the emergent light of the laser light source is combined with the emergent light of the LED light source with the same color and then combined with the LED light sources with other colors, and the emergent light brightness of the light source device can be increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by adding the laser light sources in an original LED light source system.

In specific implementation, the first LED light source 11 is a red LED, the second LED light source 12 is a green LED, and the third LED light source 13 is a blue LED. The laser light source L is a red laser chip or a red laser, and is not limited herein.

The green LED has low brightness, green fluorescent powder is arranged in the green LED, and a blue LED chip is adopted to excite the green fluorescent powder to emit green light. In order to improve the brightness of the green light, a blue light source can be added for emitting and irradiating the green fluorescent powder to excite the green fluorescent powder, and the stimulated emission times of the green fluorescent powder in the green light LED can be increased to enhance the intensity of the green light.

Fig. 3 is a second schematic structural diagram of a light source device according to an embodiment of the present invention.

In some embodiments, as shown in fig. 3, the light source device further includes: a fourth LED light source 14. The fourth LED light source 14 emits light of a third wavelength band, and the fourth LED light source 14 is configured to illuminate and excite the second LED light source 12 to emit light of a second wavelength band.

The fourth LED light source 14 can emit light of a third wavelength band to the second LED light source 12 through the second light combining component 2, so as to excite the phosphor in the second LED light source 12 to increase the emission of light of the second wavelength band. In an embodiment of the present invention, the light of the second wavelength band may be green light, and the light of the third wavelength band may be blue light; the second LED light sources 12 may be green LEDs and the fourth LED light sources 14 may be blue LEDs. Thereby, the green light brightness of the light source device can be increased.

Specifically, as shown in fig. 3, the second light combining component 2 includes: a first combiner 21 and a second combiner 22.

The first LED light source 11 and the second LED light source 12 are arranged in parallel, the second LED light source 12 and the third LED light source 13 are vertically arranged, and the second LED light source 12 and the fourth LED light source 14 are oppositely arranged; the first LED light source 11 and the laser light source L are vertically disposed.

The first light combining mirror 21 is located at a junction of the light emitted from the second LED light source 12, the light emitted from the third LED light source 13, and the light emitted from the fourth LED light source 14, and the first light combining mirror 21 is configured to transmit the light c of the third wavelength band and reflect the light b of the second wavelength band. The second light combining mirror 22 is located at a junction of the emergent light of the first light combining mirror 21 and the combined light of the first LED light source 11 and the laser light source L, and the second light combining mirror 22 is configured to transmit the light a of the first wavelength band and reflect the light b of the second wavelength band and the light c of the third wavelength band.

In the embodiment of the present invention, the light a of the first wavelength band is red light, the light b of the second wavelength band is green light, and the light c of the third wavelength band is blue light. The first light-combining mirror 21 and the second light-combining mirror 22 can both adopt dichroic mirrors, the dichroic mirrors are formed by coating films on the surfaces of transparent flat plates by utilizing the thin film interference principle, and light with different wave bands can be reflected or increased according to the required anti-reflection.

Specifically, as shown in fig. 3, the first combiner 21 is configured to transmit blue light and reflect green light. The blue light (c) emitted from the third LED light source 13 enters the first light combiner 21 and is transmitted by the first light combiner 21 in the direction of the second light combiner 22; blue light (c) emitted from the fourth LED light source 14 enters the first light combiner 21 and is transmitted by the first light combiner 21 in the direction of the second LED light source 12; the blue light (c) emitted from the fourth LED light source 14 excites the green light (b) emitted from the phosphor in the second LED light source 12 and the green light (b) emitted from the second LED light source 12 to enter the first combiner 21 and be reflected by the first combiner 21 in the direction of the second combiner 22; thereby combining the blue light (c) and the green light (b).

The second light combiner 22 is used to transmit red light and reflect blue and green light. The blue light (c) and the green light (b) emitted from the first light combining mirror 21 enter the second light combining mirror 22 and are reflected in a predetermined direction by the second light combining mirror 22; the red light (a) emitted from the first LED light source 11 and the red laser light (d) emitted from the laser light source L are combined and then incident on the second light combining mirror 22, and are transmitted in the set direction by the second light combining mirror; the red light (a), the red laser light (d), the green light (b), and the blue light (c) are combined into white light, and the white light is emitted in a set direction.

It should be noted that, in the embodiment of the present invention, the light emitting directions of the LED light source and the laser light source are parallel or perpendicular, and therefore, any light combining mirror in the second light combining component needs to keep the 45 ° included angle with the incident light. When the LED light source is incident to any light combining mirror in the second light combining component, the LED light source is incident to the central position of the light combining mirror, so that the centers of light spots incident to the light combining mirror are overlapped, and the energy distribution of the light combining light spots is more uniform.

Fig. 4 is a third schematic structural diagram of a light source device according to an embodiment of the present invention.

At least one laser light source L is provided in the light source device, and two or more laser light sources L may be provided in the light source device in order to increase the laser intensity, as shown in fig. 4. The laser light source L may employ a laser chip or a laser. The embodiment of the utility model provides an in, light source device can include two and set up laser source L side by side, and this laser source can be red laser instrument.

In a specific implementation, a converging lens group 35 may be disposed on the light emitting side of each laser light source to converge the laser light emitted from each laser light source, so that the emitted light from each laser light source is combined into one laser spot.

In the embodiment of the present invention, the converging lens group 35 includes at least one lens, and when only one lens is adopted, the lens may be a convex lens, which is not limited herein.

A specific embodiment of combining the first LED light source 11 and the laser light source L will be described below.

Fig. 5 is a fourth schematic structural view of a light source device according to an embodiment of the present invention.

In some embodiments, as shown in fig. 5, the first light combining component employs a reflector 23. The reflector 23 is arranged on the second light combining mirror 22; the reflector 23 is used to reflect the output light of the laser light source L toward the second combiner 22.

The laser emitted from the laser source L first enters the reflector 23, and is reflected by the reflector 23 toward the second combiner 22, and the light emitted from the first LED light source 11 is directly emitted toward the second combiner 22, so that the light emitted from the first LED light source 11 and the laser emitted from the laser source L are combined.

In the embodiment of the present invention, the light-emitting side of the laser light source L is provided with the converging lens group 35, and the reflecting mirror 23 can be disposed between the second light combining mirror 22 and the converging lens group 35.

It should be noted that, as shown in fig. 5, the laser light source L is disposed perpendicular to the first LED light source 11, and the second light combining mirror 22 is disposed to incline 45 ° with respect to the emergent light of the first LED light source 11 and the laser light source L. The reflecting mirror 23 is provided at an angle of 45 ° with respect to the light emitted from the laser light source L, and reflects the incident laser light toward the second beam combiner 22.

The laser spot emitted from the laser source L to the reflector 23 is symmetrical about the center point of the reflector 23, and the connection line between the center point of the reflector 23 and the center point of the second combiner 22 is parallel to the light emitting direction of the first LED light source 11, so that the laser reflected by the reflector is incident to the center point of the second combiner 22, and the laser spot incident to the second combiner 22 is symmetrical about the center point of the second combiner 22. The emergent light of the first LED light source 11 is incident to the center point of the second light combining mirror 22, so that the light spot incident to the second light combining mirror 22 is also symmetrical with respect to the center point of the second light combining mirror 22, thereby the laser light spot is located at the center of the light combining light spot, and the energy distribution of the light combining light spot is more uniform.

Because set up speculum 23 and can shelter from the emergent light of a part of first LED light source 11 on second beam combiner 22, consequently in the embodiment of the utility model provides an, set up speculum 23's size as far as possible for a short time to can receive the laser beam of laser light source L outgoing completely. Since the laser has a larger energy relative to the light emitted from the LED, the blocked part of the light emitted from the first LED light source 11 can be compensated by the laser, and thus, a larger light loss is not caused.

Fig. 6 is a fifth schematic structural view of a light source device according to an embodiment of the present invention.

In some embodiments, as shown in fig. 6, the first light combining component employs a third light combining mirror 24. The third light combining mirror 24 is located at the intersection of the emergent light of the first LED light source 11 and the emergent light of the laser light source L, and the third light combining mirror 24 is configured to reflect the light of the fourth wavelength band and transmit the light of the first wavelength band except the light of the fourth wavelength band.

The emergent light of the first LED light source 11 and the emergent light of the laser light source L have the same color, and the first waveband covers the fourth waveband. The third light-combining mirror 24 can be a dichroic mirror for reflecting the light of the fourth wavelength band and transmitting the light of the first wavelength band except for the fourth wavelength band.

The light of the fourth wavelength band emitted from the laser light source L enters the third beam combiner 24 and is reflected by the third beam combiner 24 toward the second beam combiner 22; after the light of the first wavelength band emitted from the first LED light source 11 enters the third light combining mirror 24, the light of the fourth wavelength band in the first wavelength band is reflected by the third light combining mirror 24, and the light of the first wavelength band other than the fourth wavelength band is transmitted by the third light combining mirror 24, so that the light of the fourth wavelength band emitted from the laser light source L is combined with the light of the first wavelength band other than the fourth wavelength band emitted from the first LED light source 11.

It should be noted that a connection line between the center point of the third combiner 24 and the center point of the second combiner 22 is parallel to the light emitting direction of the first LED light source 11 and perpendicular to the light emitting direction of the laser light source L. The laser light source L and the first LED light source 11 both emit light to the center point of the third light combining mirror 24, so that a laser spot of the laser light source L incident on the third light combining mirror 24 and a spot of the first LED light source 11 incident on the third light combining mirror 24 are symmetrical with respect to the center point of the third light combining mirror 24, and the laser spot is located in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

Since the laser light has a larger energy than the light emitted from the LED, the energy of the light in the fourth wavelength band reflected by the third combiner 24 from the first LED light source 11 is small compared with the laser light, and the generated light loss is small.

Fig. 7 is a sixth schematic structural view of a light source device according to an embodiment of the present invention.

In some embodiments, as shown in fig. 7, the first light combining component employs a light transmissive mirror 25. The light-transmitting mirror 25 is positioned between the first LED light source 11 and the second light-combining mirror 22; a reflecting layer f is arranged on the partial surface of one side of the light-transmitting mirror 25, which is far away from the first LED light source 11, and is used for reflecting the emergent light of the laser light source L to the second light-combining mirror 22; the other part of the light-transmitting mirror 25 except for the light-reflecting layer f is used for transmitting the light emitted from the first LED light source 11.

The laser emitted from the laser source L is incident on the reflective layer f, reflected by the reflective layer f to the second light combining mirror 22, and the emitting light of the first LED light source 11 directly passes through the light transmitting mirror 25 to be emitted to the second light combining mirror 22, so that the emitting light of the first LED light source 11 and the laser emitted from the laser source L are combined.

The reflecting layer f is located at the center of the transparent mirror 25, and a connecting line between the center of the transparent mirror 25 and the center of the second light combining mirror 22 is parallel to the light emitting direction of the first LED light source 11 and perpendicular to the light emitting direction of the laser light source L. The laser spots emitted from the laser source L to the reflective layer f are symmetrical with respect to the central point of the reflective layer f, and the spots incident on the transparent mirror 25 from the first LED light source 11 are symmetrical with respect to the central point of the transparent mirror 25. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

Because the emergent light of the first LED light source 11 of a part can be sheltered from to reflector layer f, consequently the embodiment of the utility model provides an in, set the size of reflector layer f as little as possible, make the area of reflector layer f be less than or equal to 1/10 of the emergent facula area of first LED light source 11 to make and shelter from the energy loss control of the emergent light of first LED light source 11 that causes by reflector layer f below 10%. Since the laser has a larger energy than the light emitted from the LED, the blocked part of the light emitted from the first LED light source 11 can be compensated by the laser without causing a large light loss.

In a specific implementation, any one of the light combining structures in fig. 5 to 7 may be used to combine the light emitted from the first LED light source 11 and the emitted laser light from the laser light source L, and then combine the combined light with the light emitted from the second LED light source 12 and the third LED light source 13 to obtain white light, and emit the white light in a set direction.

Fig. 8 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 8, the light source device further includes: a first collimating lens group 31, a second collimating lens group 32, a third collimating lens group 33, and a fourth collimating lens group 34. Wherein, the first collimating lens group 31 is located at the light-emitting side of the first LED light source 11; the second collimating lens group 32 is positioned at the light-emitting side of the second LED light source 12; the third collimating lens group 33 is located at the light emitting side of the third LED light source 13; the fourth collimating lens group 34 is located on the light exit side of the fourth LED light source 14.

Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

The collimating lens group includes at least one lens, as shown in fig. 8, and in an embodiment of the present invention, the collimating lens group may include two lenses, which is not limited herein.

Fig. 9 is an eighth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 9, the light source device further includes: a converging lens group 4. The beam reduction lens group 4 is located between the first light combining mirror 21 and the second light combining mirror 22.

Because the optical paths of the emergent lights of the LED light sources before combining are different, the emergent lights of the LED light sources have a certain divergence angle, the optical paths of the second LED light source 12 and the third LED light source 13 before entering the second light combining mirror 22 are longer relative to the optical path of the first LED light source 11, and the light spot size after the light paths diverge as long as possible is larger, the combined light of the second LED light source 12 and the third LED light source 13 needs to be firstly condensed by the light condensing lens group 4 before entering the second light combining mirror 22, so that the combined light spot of the second LED light source 12 and the third LED light source 13 is as same as the light spot size of the first LED light source 11 as possible.

In the embodiment of the present invention, the beam reduction lens group 4 includes at least one lens, and when only one lens is adopted, the lens may be a convex lens, which is not limited herein.

Fig. 10 is a ninth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 10, the light source device further includes: and a light uniformizing member 5. The dodging component 5 is positioned at the light-emitting side of the second light combining mirror 22.

The embodiment of the utility model provides a set up dodging part 5 in the light-emitting side that the second closed light mirror 22, can merge the further dodging of light beam to different LED light sources and laser light source, only need set up a dodging part 5 in light source device to need not set up dodging part respectively to the light source of difference, be favorable to simplifying the light source device structure, reduce the light source device volume.

In a specific implementation, as shown in fig. 10, the light uniformizing part 5 may adopt a fly-eye lens group, where the fly-eye lens group includes a first fly-eye lens and a second fly-eye lens which are arranged opposite to each other, and surfaces of the first fly-eye lens and the second fly-eye lens each include a micro lens unit arranged in an array. The light beams after light combination pass through the first fly-eye lens and are focused to the center of each micro lens unit of the second fly-eye lens, and the second fly-eye lens enables imaging light rays of the first fly-eye lens to be overlapped and imaged on the illumination surface. Thereby effectively improving the uniformity of the illumination light beam and the illumination brightness.

In addition, the light uniformizing member 5 may also be a light guide, a light bar, or the like, and is not limited herein.

Based on same utility model the design, the embodiment of the utility model provides a still provide a projection system. Fig. 11 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

As shown in fig. 11, the projection system includes any of the light source devices 100 described above, an illumination optical path 200, a light valve modulation section 300, and a projection lens 400. The illumination light path 200 is located on the light emitting side of the light source device 100, the light valve modulation component 300 is located on the light emitting side of the illumination light path 200, and the projection lens 400 is located on the reflection light path of the light valve modulation component 300.

The light-emitting embodiment adds the laser light source in the light source device, the brightness of the laser light source is larger than that of the LED light source, the laser light source is added in the three-color LED light source system, the emergent light of the laser light source is combined with the emergent light of the LED light source with the same color and then combined with the LED light sources with other colors, and the emergent light brightness of the light source device can be increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by adding the laser light sources in an original LED light source system.

The illumination optical path 200 is located on the light emitting side of the light source device 100, and the illumination optical path 200 collimates the light emitted from the light source device 100 and allows the light emitted from the light source device 100 to enter the light valve modulating member 300 at an appropriate angle. The illumination path 200 may include a plurality of lenses or lens groups, which are not limited herein.

The light valve modulating unit 300 is used to modulate and reflect the incident light. In an embodiment, the light valve modulating component 300 may employ a Digital Micromirror (DMD). After passing through the illumination optical path 200, the light beam conforms to the illumination size and incident angle required by the DMD. The DMD surface includes thousands of minute mirrors, each of which can be individually driven to deflect, and the reflected light is made incident on the projection lens 400 by controlling the deflection angle of the DMD.

The projection lens 400 is used for imaging the outgoing light from the light valve modulation unit 300, and is used for projection imaging after being imaged by the projection lens 400.

The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

According to a first utility model, the light source device includes: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and at least one laser light source. The light source device is provided with two light combination assemblies, the first light combination assembly is positioned at the intersection of emergent light of the first LED light source and emergent light of the laser light source, and the first light combination assembly is used for combining emergent light of the first LED light source and emergent light of the laser light source; the second light combination assembly is located at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the first light combination assembly, and the second light combination assembly is used for combining the emergent light of the first light combination assembly, the emergent light of the second LED light source and the emergent light of the third LED light source. The brightness of the laser light source is larger than that of the LED light source, the laser light source is added in a three-color LED light source system, the emergent light of the laser light source is combined with the emergent light of the LED light source with the same color and then combined with the LED light sources with other colors, and the emergent light brightness of the light source device can be increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by adding the laser light sources in an original LED light source system.

According to a second utility model, the light source device further includes: and a fourth LED light source. The fourth LED light source is used for irradiating and exciting the second LED light source to emit light of a second wave band. The fourth LED light source can emit light of a third wavelength band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wavelength band.

According to the third utility model, the first LED light source adopts ruddiness LED, and the second LED light source adopts green glow LED, and third LED light source and fourth LED light source adopt blue light LED. The laser light source adopts a red light laser chip or a red light laser.

According to a fourth utility model, the second closes light subassembly and includes: the first light-combining mirror and the second light-combining mirror. The first light combining mirror is located at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the fourth LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the second wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the combined light of the first LED light source and the laser light source, and the second light combining mirror is used for transmitting the light of the first wave band and reflecting the light of the second wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can adopt dichroic mirrors.

According to the fifth novel concept, in order to increase the laser intensity, two or more laser light sources may be provided in the light source device. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

According to a sixth utility model, think of, first light combination subassembly includes: a mirror. The reflector is arranged on the second light combining mirror. The laser emitted by the laser source firstly enters the reflector and is reflected to the second light combining mirror by the reflector, and the emergent light of the first LED light source directly emits to the second light combining mirror, so that the emergent light of the first LED light source and the laser emitted by the laser source are combined.

According to the seventh utility model, the laser facula that the laser light source was sent out the speculum is symmetrical about the central point of speculum, and the central point of speculum and the line of the central point of the second closed light mirror are on a parallel with the light emitting direction of first LED light source, can make the laser that the speculum reflected incide to the central point that the second closed light mirror like this, and the laser facula that incides the second closed light mirror is symmetrical for the central point of the second closed light mirror. The emergent light of the first LED light source is incident to the central point of the second light combining mirror, so that the light spot incident to the second light combining mirror is symmetrical relative to the central point of the second light combining mirror, and the laser light spot is positioned in the center of the light combining light spot, so that the energy distribution of the light combining light spot is more uniform. Because the reflector arranged on the second light combining mirror can shield part of emergent light of the first LED light source, the size of the reflector is set to be as small as possible so as to completely receive laser beams emitted by the laser light source. Because the laser has larger energy relative to the emergent light of the LED, the shielded emergent light of the first LED light source can be compensated by the laser, and larger light loss can not be caused.

According to the eighth utility model, think, first light combination subassembly includes: and a third light-combining mirror. The third light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the laser light source. The color of emergent light of the first LED light source is the same as that of emergent light of the laser light source, and the first wave band covers the fourth wave band. Therefore, the third light combining mirror may adopt a dichroic mirror for reflecting the light of the fourth wavelength band and transmitting the light of the first wavelength band except the fourth wavelength band. After light of a fourth waveband emitted by the laser light source enters the third light combining mirror, the light is reflected to the direction of the second light combining mirror by the third light combining mirror; after the light of the first wavelength band emitted by the first LED light source enters the third light combining mirror, the light of the fourth wavelength band in the first wavelength band is reflected by the third light combining mirror, and the light except the fourth wavelength band in the first wavelength band is transmitted by the third light combining mirror, so that the light of the fourth wavelength band emitted by the laser light source is combined with the light except the fourth wavelength band in the first wavelength band emitted by the first LED light source.

According to the ninth utility model, the line connecting the center point of the third light combining mirror and the center point of the second light combining mirror is parallel to the light emitting direction of the first LED light source and perpendicular to the light emitting direction of the laser light source. The laser light source and the first LED light source emit light to the central point of the third light combining mirror, so that laser spots of the laser light source, which are incident on the third light combining mirror, and spots of the first LED light source, which are incident on the third light combining mirror, are symmetrical relative to the central point of the third light combining mirror, and the laser spots are positioned in the center of the light combining spots, so that the energy distribution of the light combining spots is more uniform. Since the laser has a larger energy relative to the light emitted from the LED, the energy of the light in the fourth wavelength band reflected by the third light combining mirror from the first LED light source is smaller than that of the laser, and the generated light loss is smaller.

According to a tenth utility model, think of, first light combination subassembly includes: a light-transmitting mirror. The light-transmitting mirror is positioned between the first LED light source and the second light combining mirror; and a reflecting layer is arranged on the partial surface of one side of the light-transmitting mirror, which deviates from the first LED light source. Laser emitted by the laser source is incident to the reflecting layer and reflected to the second light combining mirror by the reflecting layer, and emergent light of the first LED light source directly penetrates through the light transmitting mirror to be emitted to the second light combining mirror, so that the emergent light of the first LED light source and the laser emitted by the laser source are combined.

According to the eleventh utility model, the reflection of light layer is located the central point of printing opacity mirror and puts, and the central point of printing opacity mirror and the line of the central point of second closed light mirror are on a parallel with the light outgoing direction of first LED light source, perpendicular to laser light source's light outgoing direction. The laser facula that the laser light source is emergent to the reflector layer is symmetrical about the central point of reflector layer, and the facula that first LED light source incides on the printing opacity mirror is symmetrical for the central point of printing opacity mirror. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform. The reflective layer can shield part of emergent light of the first LED light source, the size of the reflective layer is set to be as small as possible, the area of the reflective layer is smaller than or equal to 1/10 of the area of an emergent light spot of the first LED light source, and therefore the energy loss of the emergent light of the first LED light source caused by shielding of the reflective layer is controlled to be below 10%. Because the laser has larger energy relative to the emergent light of the LED, the shielded emergent light of the first LED light source can be compensated by the laser, and larger light loss can not be caused.

According to a twelfth utility model, the light source device further includes: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned at the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

According to a thirteenth utility model, the light source device further includes: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent lights of the LED light sources before being combined are different, the emergent lights of the LED light sources have a certain divergence angle, the light path of the second LED light source and the second LED light source before being incident on the second light combining mirror is longer relative to the light path of the first LED light source, and the light spot size after being dispersed is larger as the light path is longer, the combined light of the second LED light source and the second LED light source needs to be condensed by the beam condensing lens group before being incident on the second light combining mirror, so that the combined light spot of the second LED light source and the second LED light source is the same as possible as the light spot size of the first LED light source.

According to a fourteenth aspect of the present invention, the light source device further includes: and a light uniformizing part. The dodging component is positioned on the light emitting side of the second light combining mirror. The light source device is characterized in that the light emitting side of the second light combining mirror is provided with a light homogenizing component, light beams combined by different LED light sources and laser light sources can be further homogenized, only one light homogenizing component needs to be arranged in the light source device, and the light homogenizing components do not need to be arranged on different light sources, so that the structure of the light source device is simplified, and the size of the light source device is reduced.

According to a fifteenth aspect of the present invention, a projection system includes any one of the light source devices, an illumination light path, a light valve modulation unit, and a projection lens. The light source device comprises a light source device, a light valve modulation component, a projection lens and a light source device, wherein the light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the light path, and the projection lens is positioned on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A light source device, comprising:

a first LED light source for emitting light of a first wavelength band;

the second LED light source is used for emitting light of a second wave band;

a third LED light source for emitting light of a third wavelength band;

the laser device comprises at least one laser light source, a first light source and a second light source, wherein the laser light source is used for emitting laser light of a fourth waveband, and the first waveband covers the fourth waveband;

the first light combination assembly is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the laser light source and is used for combining the emergent light of the first LED light source and the emergent light of the laser light source;

and the second light combining component is positioned at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the first light combining component, and is used for combining the emergent light of the first light combining component, the emergent light of the second LED light source and the emergent light of the third LED light source.

2. The light source device according to claim 1, further comprising:

a fourth LED light source; the fourth LED light source emits light of the third wavelength band, and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light of the second wavelength band.

3. The light source device of claim 2, wherein the second light combining component comprises: a first light combining mirror and a second light combining mirror;

the first LED light source and the second LED light source are arranged in parallel, the second LED light source and the third LED light source are vertically arranged, and the second LED light source and the fourth LED light source are oppositely arranged; the first LED light source and the laser light source are vertically arranged;

the first light combining mirror is positioned at the intersection of the emergent light of the second LED light source, the emergent light of the third LED light source and the emergent light of the fourth LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the second wave band;

the second light combining mirror is located at the intersection of the emergent light of the first light combining mirror and the emergent light of the first light combining component, and the second light combining mirror is used for transmitting the light of the first waveband and reflecting the light of the second waveband and the light of the third waveband.

4. The light source device of claim 3, wherein the first light combining component comprises:

the reflecting mirror is arranged on the second light combining mirror; the reflector is used for reflecting the emergent light of the laser light source to the second light combiner;

and the connecting line of the central point of the reflector and the central point of the second light combining mirror is parallel to the light emergent direction of the first LED light source.

5. The light source device of claim 3, wherein the first light combining component comprises:

and the third light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the laser light source, and is used for reflecting the light of the fourth waveband and transmitting the light except the fourth waveband in the first waveband.

6. The light source device of claim 3, wherein the first light combining component comprises:

the light-transmitting mirror is positioned between the first LED light source and the second light combining mirror;

a reflecting layer is arranged on the partial surface of one side of the light-transmitting mirror, which is far away from the first LED light source; the reflecting layer is used for reflecting the emergent light of the laser light source to the second light combiner; the other parts of the light-transmitting mirror except the reflecting layer are used for transmitting emergent light of the first LED light source.

7. The light source device according to claim 6, wherein the reflective layer is located at a center of the transparent mirror, and an area of the reflective layer is less than or equal to 1/10 of an area of an exit spot of the first LED light source.

8. The light source device according to any one of claims 3 to 7, further comprising:

the first collimating lens group is positioned on the light emitting side of the first LED light source;

the second collimating lens group is positioned on the light emitting side of the second LED light source;

the third collimating lens group is positioned on the light emitting side of the third LED light source;

the fourth collimating lens group is positioned on the light emitting side of the fourth LED light source;

the converging lens group is positioned on the light-emitting side of the laser light source;

the beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens;

and the light homogenizing component is positioned on the light emergent side of the second light combining mirror.

9. The light source device according to any one of claims 2 to 7, wherein the light of the first wavelength band is red light, the light of the second wavelength band is green light, and the light of the third wavelength band is blue light;

the first LED light source is a red LED, the second LED light source is a green LED, and the third LED light source and the fourth LED light source are blue LEDs; the laser light source is a red light laser chip or a red light laser.

10. A projection system comprising the light source device according to any one of claims 1 to 9, an illumination light path, a light valve modulation member, and a projection lens;

the illumination light path is positioned on the light emitting side of the light source device, and the light valve modulation component is positioned on the light emitting side of the illumination light path and used for modulating and reflecting incident light; the projection lens is positioned on a reflection light path of the light valve modulation component and is used for imaging emergent light of the light valve modulation component.

Images