CN103186025A - Light source device, light source generation method and laser projector with light source device - Google Patents
Light source device, light source generation method and laser projector with light source device Download PDFInfo
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Abstract
The invention discloses a light source device, a light source generation method and a laser projector with the light source device. The light source device comprises first laser light sources, collimation parts, a reflection part, a first condensation part, a dichroic part, a drive part, a second condensation part, a wavelength conversion part, a third condensation part, a light receiving part and a reflection steering mirror group. According to the light source device, the light source generation method and the laser projector with the light source device, the problem of periodical brightness variation generated by a light source can be effectively solved, and the quality of a projected image can be greatly improved.
Description
Technical Field
The present invention relates to laser projection technology, and more particularly, to a light source device, a light source generating method, and a laser projector including the light source device.
Background
In recent years, laser projectors have been widely used in many applications, such as television projection, micro projection, and some commercial, educational, and home entertainment systems, because of their advantages, such as long life, high brightness of screen, and rich colors.
It is known that an optical picture needs to be composed of at least light waves of different dominant wavelengths, for example of blue, green and red light waves. In the prior art, a light source with one wavelength is usually used as an excitation light to generate a light source with another wavelength, and then the light source is emitted in a time-sharing manner with the light sources with other wavelengths, so that various pictures are displayed on a projection screen. For example, green phosphor may be excited to generate green light with blue laser light emitted from a blue semiconductor laser as excitation light.
Fig. 1 is a schematic diagram of a structure and a principle of a light source device in the prior art. Referring to fig. 1, the light source herein includes: a first light source 101, a second light source (not shown in fig. 1), and a third light source 116, each having a different wavelength. The light source device includes: the light source device comprises a collimating mirror 102, a reflector group 103, a first condenser lens 104, a first dichroic sheet 105, a second condenser lens 106, a fluorescent wheel 107, a first steering mirror 109a, a second steering mirror 109b, a first reflector 110a, a second reflector 110b, a second dichroic sheet 111, a third condenser lens 112, a light bar 113, a fourth condenser lens 114 and a third steering mirror 115.
Wherein the first dichroic filter 105 allows the first and third light sources to transmit therethrough and reflects the second light source, and the second dichroic filter 111 allows the first light source to transmit therethrough and reflects the second and third light sources.
In addition, a phosphor is applied to a partial region of the fluorescent wheel 107, and in the case where the first light source 101 is used as excitation light, a second light source is generated in the region where the phosphor is applied. Since the fluorescent wheel is rotatable, the first light source illuminates different areas of the fluorescent wheel 107, which generates light of different wavelengths.
In fig. 1, a light beam having a first wavelength emitted from a first light source 101 is divergently incident on a collimator 102, and the collimator 102 collimates the light beam into a parallel light beam; the optical axis of the parallel light beam is rotated by 90 degrees due to the reflection action of the reflector group 103, and the parallel light beam after the rotating optical axis is converged by the first condenser lens 104 and emitted to the first dichroic filter 105; the light beam of the first light source passes through the first dichroic plate 105, is condensed by the second condenser lens 106, and reaches the fluorescent wheel 107.
The fluorescent wheel 107 is rotated by the driving motor 117. For the rotating fluorescent wheel 107, if the first light source 101 is incident on the fluorescent area, the fluorescent powder is excited to emit a second light source with a second wavelength, the second light source is emitted in a direction opposite to the incident direction of the first light source, and after reaching the first dichroic plate 105, the optical axis thereof is rotated by 90 degrees under the reflection action, and after passing through the first turning mirror 109a, the first reflecting mirror 110a, and the second turning mirror 109b, the light is incident on the second dichroic plate 111; since the second dichroic plate 111 reflects the second light source, the light beam of the second light source is directed to the third condenser lens 112 and finally focused into the light rod 113. In short, when the first light source 101 is incident on the phosphor region of the phosphor wheel 107, the light bar 113 collects the second light source having the second wavelength.
When the first light source 101 is incident on the transmission region of the fluorescent wheel 107 without being coated with the phosphor, the first light source 101 transmits through the fluorescent wheel 107, is converged, reflected and steered by the fourth condenser lens 114, the second reflector 110b and the third steering mirror 115, is transmitted to the third condenser lens 112 through the second dichroic filter 111, and is finally focused into the light bar 113. That is, when the first light source 101 is incident on the transmission region of the fluorescent wheel 107, the light rod 113 collects the first light source having the first wavelength.
A third light source 116 with a third wavelength is emitted in a direction parallel to the optical axis of the first light source, and reaches the first dichroic filter 105 after being converged by the second condenser lens 106, and because the third light source is allowed to transmit by the first dichroic filter 105, the third light source reaches the second dichroic filter 111 after being turned, reflected, and re-turned by the first turning mirror 109a, the first reflector 110a, and the second turning mirror 109 b; the second dichroic plate 111 rotates the optical axis of the third light source 116 by 90 degrees, passes through the third condenser lens 112, and is finally focused into the light rod 113.
Based on the structure and the principle, the first light source, the second light source and the third light source can enter the light bar 113 in a time-sharing manner by controlling the lighting time of the first light source and the third light source and controlling the rotation speed of the fluorescent wheel, so that light spots with different colors can be obtained, and a display picture can be formed.
Although the above-described conventional light source device enables laser projection, it can be seen from fig. 1 that the drive motor 117 of the luminescent wheel 107 in the light source device is a rotating electric machine. The rotating motor can cause a motor shaft of the rotating motor to periodically swing around a shaft due to the influence of the rotational inertia. Therefore, when the rotating motor starts to rotate and the motor shaft of the rotating motor swings, the fluorescent wheel 107 moves back and forth relative to the predetermined design position, so that the light source generated by the light source device generates periodic brightness change due to the back and forth movement of the fluorescent wheel 107, thereby causing periodic brightness change and non-uniformity of the image brightness of the same projection image and reducing the quality of the projection image. Meanwhile, the system of the existing light source device is relatively complex and difficult to install and adjust. In addition, in the light source device in the prior art, the motor rotating at high speed is a safety hazard.
As can be seen from the above, the light source device in the prior art still has some of the above problems, and therefore, there is a need to provide a better light source device, so as to avoid the problem of periodic brightness variation of the light source and improve the quality of the projected picture.
Disclosure of Invention
According to the invention, the light source device, the light source generating method and the laser projector comprising the light source device are provided, so that the problem that the light source generates periodic brightness change can be effectively avoided, and the quality of a projection picture is greatly improved.
A light source device according to the present invention includes: the device comprises a first laser light source, a collimation component, a reflection component, a first light condensation component, a dichroic component, a driving component, a second light condensation component, a wavelength conversion component, a third light condensation component, a light receiving component and a reflection steering mirror group; wherein,
the first laser light source is used for outputting a first light beam with a first wavelength to the collimation component;
the collimation component is used for collimating the received first light beam to obtain a parallel light beam and outputting the parallel light beam to the reflection component;
the reflecting component is used for reflecting the parallel light beams to the first light focusing component;
the first light focusing component is used for focusing the received parallel light beams and outputting the light beams to the dichroic component;
the driving component is used for moving the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
the dichroic component is used for reflecting the light beam output by the first light-gathering component to the second light-gathering component; transmitting the received light beam output by the second light-condensing part to the light-receiving part; reflecting the light beams output by the reflection steering mirror group to the light receiving component;
the second light condensation component is used for condensing the received light beams reflected by the dichroic component and outputting the light beams to the wavelength conversion component; and outputting the received light beam output by the wavelength conversion member to the dichroic member;
the wavelength conversion member is configured to transmit the received light beam having the first wavelength to the third dichroic member when the dichroic member is located at the first position; when the dichroic component is located at the second position, a second light beam with a second wavelength is output according to the received light beam in a stimulated mode, and the second light beam is output to the second light-focusing component; the dichroic component is used for outputting a first light beam with a first wavelength according to the received light beam, and outputting the first light beam to the first light-focusing component;
the third light condensing component is used for condensing the received light beam and outputting the light beam to the reflector group;
and the reflector group is used for reflecting and converging the light beams output by the third light condensing component and then outputting the light beams to the dichroic component.
Wherein the mirror group comprises: the device comprises a first reflector, a second reflector, a third reflector, a first steering mirror, a second steering mirror and a third steering mirror;
the first reflecting mirror is used for reflecting the light beam output by the third light-focusing component to the first steering mirror;
the first steering mirror is used for converging the light beam output by the first reflecting mirror and outputting the light beam to the second reflecting mirror;
the second reflector is used for reflecting the light beam output by the first steering mirror to the second steering mirror;
the second steering mirror is used for converging the light beam output by the second reflecting mirror and outputting the light beam to the third reflecting mirror;
the third reflector is used for reflecting the light beam output by the second steering mirror to the third steering mirror;
and the third steering mirror is used for converging the light beam output by the third reflecting mirror and outputting the light beam to the dichroic component.
Wherein the driving member is connected to the dichroic member through a driving shaft.
Wherein the driving part is a driving motor.
Wherein the wavelength conversion member includes at least: the light-transmitting through hole corresponds to the first position, the first cavity corresponds to the second position, and the second cavity corresponds to the third position; wherein,
the light-transmitting through hole is used for transmitting a light beam with a first wavelength;
high-reflection films are arranged on the inner walls of the first cavity and the second cavity;
a first light-transmitting material with a preset area is arranged on the high-reflection film at the top of the first cavity; the high-reflection film at the bottom of the first cavity is coated with second wavelength fluorescent powder for stimulated output of a second light beam with a second wavelength;
a second light-transmitting material with a preset area is arranged on the high-reflection film at the top of the second cavity; and the high-reflection film at the bottom of the second cavity is coated with third-wavelength fluorescent powder for stimulated output of a third light beam with a third wavelength.
Wherein a heat sink is disposed below each cavity of the wavelength converting member.
Wherein the light receiving part includes: a fifth condenser lens and a light rod; wherein,
the fifth condenser lens is used for converging the light beam entering the fifth condenser lens;
and the light bar is used for collecting the light beams subjected to the convergence processing by the fifth condenser lens.
Wherein the light receiving part is a fly eye lens.
The present invention also provides a light source generating method for use in a light source device including a first laser light source, a collimating component, a reflecting component, a first condensing component, a dichroic component, a driving component, a second condensing component, a wavelength converting component, a third condensing component, a light receiving component, and a reflective turning mirror group, the method comprising:
the collimation component is used for collimating a first light beam with a first wavelength output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to the first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
when the dichroic member is located at a first position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component transmits the received light beam having the first wavelength to the third light condensing component; the third light condensing component outputs the light beam with the first wavelength output by the wavelength conversion component to the reflector group; the reflecting mirror group reflects and converges the light beam with the first wavelength output by the third light condensing component and outputs the light beam to the dichroic component; the dichroic component reflects the light beam with the first wavelength output by the reflection steering mirror group to the light receiving component;
when the dichroic member is located at the second position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a second light beam with a second wavelength according to the received light beam with the first wavelength in a stimulated mode, and outputs the second light beam to the second light condensation component; the second condensing part outputs the light beam having the second wavelength output from the wavelength conversion part to the dichroic part; the dichroic part transmits the light beam having the second wavelength output from the second light condensing part to the light receiving part;
when the dichroic member is located at a third position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a third light beam with a third wavelength according to the received light beam with the first wavelength in an excited mode, and outputs the third light beam to the second light condensation component; the second condensing part outputs the light beam having the third wavelength output from the wavelength conversion part to the dichroic part; the dichroic component transmits the light beam with the third wavelength output by the second light-focusing component to the light-receiving component.
The present invention also provides a laser projector, including: an optical-mechanical module, a control module, a power driving module and the light source device, wherein,
the optical-mechanical module consists of a uniform illumination component, a display chip and a projection lens;
the light source device provides a usable light source for the laser projector;
the optical-mechanical module receives a light source provided by the light source device, the dodging illumination component further dodges the light source, the display chip generates a picture under the real-time control of the control module, and the generated picture is projected to form a picture to be displayed through the projection lens.
As can be seen from the above technical solutions, in the light source device, the light source generating method and the laser projector including the light source device provided in the present invention, since one dichroic component that can rotate to a plurality of designated positions is used in the light source device, the light beam output by the first laser light source can be reflected onto the wavelength conversion component, so that the wavelength conversion component can output light beams of a plurality of required wavelengths to the light receiving component according to the positions of the dichroic component, thereby forming a plurality of different available light sources. Because the light source device does not use the fluorescent wheel and the rotating motor, but uses the dichroic component which can move to a plurality of specified positions and the wavelength conversion component which can output light beams with a plurality of wavelengths according to the positions of the dichroic component, the problem that the position of the fluorescent wheel moves when the rotating motor is used, and further the light source generates periodic brightness change can be effectively avoided, and the quality of a projection picture is greatly improved. Furthermore, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments and drawings may be devised by those skilled in the art based on the exemplary embodiments shown in the drawings.
FIG. 1 is a schematic diagram of a light source device according to the prior art;
FIG. 2 is a schematic diagram illustrating a structure and a principle of a light source device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a driving component and a dichroic component in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a dichroic element in a first position in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a dichroic element in a second position in an embodiment of the present invention;
fig. 6 is a schematic diagram of the dichroic member in a third position in an embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of a wavelength conversion member in an embodiment of the invention;
FIG. 8 is a top schematic view of a wavelength converting member in an embodiment of the present invention;
fig. 9 is a schematic diagram of a laser projector in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Fig. 2 is a schematic structural and schematic diagram of a light source device according to an embodiment of the present invention. As shown in fig. 2, in an embodiment of the present invention, the light source device at least includes: a first laser light source 201, a collimating component 202, a reflecting component 203, a first light focusing component 204, a dichroic component 205, a driving component 205a (not shown in fig. 2), a second light focusing component 206, a wavelength converting component 207, a third light focusing component 208, a light receiving component 209, and a mirror steering mirror group 210;
wherein, the first laser source 201 is configured to output a first light beam with a first wavelength to the collimating component 202;
the collimating component 202 is configured to perform collimation on the received first light beam to obtain a parallel light beam, and output the parallel light beam to the reflecting component 203;
the reflecting component 203 is configured to reflect the parallel light beams to the first light focusing component 204;
the first light focusing component 204 is configured to converge the received parallel light beams and output the converged parallel light beams to the dichroic component 205;
the driving unit 205a is configured to move the dichroic unit 205 to a plurality of designated positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
the dichroic component 205 is configured to reflect the light beam output by the first light focusing component 204 to the second light focusing component 206; transmitting the received light beam output by the second light-focusing part 206 to the light-receiving part 209; reflecting the light beam output by the steering mirror group 210 to the light receiving component 209;
the second condensing unit 206 that condenses the received light beam reflected by the dichroic unit 205 and outputs the condensed light beam to the wavelength conversion unit 207, and outputs the received light beam output by the wavelength conversion unit 207 to the dichroic unit 205;
the wavelength conversion member 207 is configured to transmit the received light beam having the first wavelength to the third condensing member 208 when the dichroic member 205 is located at the first position; when the dichroic member 205 is located at the second position, a second light beam having a second wavelength is outputted according to the received light beam, and the second light beam is outputted to the second condensing member 206; and is further configured to output a third light beam having a third wavelength according to the received light beam when the dichroic component 205 is located at a third position, and output the third light beam to the second light-focusing component 206;
the third light condensing element 208 is configured to condense the received light beam and output the condensed light beam to the mirror group 210;
the mirror group 210 is configured to reflect and converge the light beam output by the third light condensing component 208, and then output the light beam to the dichroic component 205.
Preferably, as shown in fig. 2, in an embodiment of the present invention, the mirror group 210 may include: a first reflecting mirror 210a, a second reflecting mirror 210b, a third reflecting mirror 210c, a first turning mirror 211a, a second turning mirror 211b, and a third turning mirror 211 c;
the first reflecting mirror 210a is configured to reflect the light beam output by the third condensing component 208 to the first steering mirror 211 a;
the first turning mirror 211a is configured to converge the light beam output by the first reflecting mirror 210a and output the light beam to the second reflecting mirror 210 b;
the second reflecting mirror 210b is configured to reflect the light beam output by the first turning mirror 211a to the second turning mirror 211 b;
the second turning mirror 211b is configured to converge the light beam output by the second reflecting mirror 210b and output the light beam to the third reflecting mirror 210 c;
the third reflecting mirror 210c is configured to reflect the light beam output by the second turning mirror 211b to the third turning mirror 211 c;
the third turning mirror 211c is configured to converge the light beam output by the third reflecting mirror 210c and output the light beam to the dichroic component 205.
Fig. 3 is a schematic structural diagram of a driving component and a dichroic component in an embodiment of the present invention. As shown in fig. 3, in the preferred embodiment of the present invention, the driving member 205a is connected to the dichroic member 205 through the driving shaft 205b, so that the dichroic member 205 can be driven by the driving member 205a to swing to a plurality of designated positions.
Preferably, in the embodiment of the present invention, the driving member 205a is a driving motor.
Fig. 4 is a schematic diagram of the dichroic member in a first position in an embodiment of the present invention. Fig. 5 is a schematic diagram of the dichroic member in a second position in an embodiment of the present invention. Fig. 6 is a schematic diagram of the dichroic member in a third position in an embodiment of the present invention.
As shown in fig. 4, in the preferred embodiment of the present invention, when the dichroic component 205 is located at the first position, the light beam with the first wavelength output by the first light focusing component 204 will be reflected by the dichroic component 205 to the second light focusing component 206;
the second condensing unit 206 condenses the light beam reflected by the dichroic unit 205 and outputs the condensed light beam to the wavelength conversion unit 207;
the wavelength conversion component 207 transmits the received light beam with the first wavelength directly to the third condensing component 208;
the third light condensing element 208 outputs the light beam having the first wavelength output from the wavelength conversion element 207 to the mirror group 210;
the mirror group 210 is configured to reflect and converge the light beam with the first wavelength output by the third dichroic component 208, and then output the light beam to the dichroic component 205;
the dichroic component 205 reflects the light beam with the first wavelength outputted from the mirror steering group 210 to the light receiving component 209.
In short, when the dichroic member 205 is located at the first position, the light receiving member 209 receives the light beam with the first wavelength, so that the first laser light source 201 can be used as the first available light source.
As shown in fig. 5, in the preferred embodiment of the present invention, when the dichroic component 205 is located at the second position, the light beam with the first wavelength output by the first light focusing component 204 will be reflected by the dichroic component 205 to the second light focusing component 206;
the second condensing unit 206 condenses the light beam with the first wavelength reflected by the dichroic unit 205 and outputs the condensed light beam to the wavelength conversion unit 207;
the wavelength conversion component 207 outputs a second light beam with a second wavelength according to the received light beam with the first wavelength, and outputs the second light beam to the second light focusing component 206;
the second condensing part 206 outputs the light beam having the second wavelength output from the wavelength conversion part 207 to the dichroic part 205;
the dichroic component 205 transmits the light beam with the second wavelength outputted from the second condensing component 206 to the light receiving component 209.
In short, when the dichroic member 205 is located at the second position, the light receiving member 209 receives the second light beam with the second wavelength, so that the first laser light source 201 can be used as the second available light source.
As shown in fig. 6, in the preferred embodiment of the present invention, when the dichroic component 205 is located at the third position, the light beam with the first wavelength output by the first light focusing component 204 will be reflected by the dichroic component 205 to the second light focusing component 206;
the second condensing unit 206 condenses the light beam with the first wavelength reflected by the dichroic unit 205 and outputs the condensed light beam to the wavelength conversion unit 207;
the wavelength conversion component 207 outputs a third light beam with a third wavelength according to the received light beam with the first wavelength, and outputs the third light beam to the second light focusing component 206;
the second condensing part 206 outputs the light beam having the third wavelength output from the wavelength conversion part 207 to the dichroic part 205;
the dichroic component 205 transmits the light beam with the third wavelength output by the second light-focusing component 206 to the light-receiving component 209.
In short, when the dichroic member 205 is located at the third position, the light receiving member 209 receives the third light beam with the third wavelength, so that the first laser light source 201 can be used as the third available light source.
Based on the above structure and principle, by controlling the position of the dichroic component 205, the first available light source, the second available light source and the third available light source can enter the light receiving component 209 in a time-sharing manner, so as to obtain light spots of different colors, thereby forming a required display picture.
Fig. 7 is a schematic cross-sectional view of a wavelength conversion member in an embodiment of the present invention. Fig. 8 is a top schematic view of a wavelength converting member in an embodiment of the present invention. As shown in fig. 7 and 8, in the preferred embodiment of the present invention, the wavelength conversion member 207 at least includes: a light-transmitting through hole 70 corresponding to the first position, a first cavity 71 corresponding to the second position, and a second cavity 72 corresponding to the third position;
wherein the light-transmitting through hole 70 is used for transmitting a light beam with a first wavelength;
the inner walls of the first cavity 71 and the second cavity 72 are both provided with a high-reflection film 73;
a first light-transmitting material 710 with a predetermined area is arranged on the high-reflection film 73 at the top of the first cavity 71;
a second wavelength phosphor 711 for stimulated output of a second light beam with a second wavelength is coated on the highly reflective film 73 at the bottom of the first cavity 71;
a second light-transmitting material 720 with a predetermined area is arranged on the high-reflection film 73 at the top of the second cavity 72;
the highly reflective film 73 at the bottom of the second cavity 72 is coated with a third wavelength phosphor 721 for stimulated output of a third light beam having a third wavelength.
Preferably, in an embodiment of the present invention, N cavities may be disposed in the wavelength conversion member 207, where N is an integer greater than or equal to 2. E.g., a third cavity, a fourth cavity, …, an nth cavity, etc. Preferably, in a specific embodiment of the present invention, the specific value of N may also be predetermined according to an actual application situation, and is not described herein again.
The high-reflection film at the bottom of each cavity is coated with fluorescent powder for stimulated output of light beams with corresponding wavelengths. The high reflection film on the top of each cavity is also provided with a light-transmitting material with a preset area. The specific arrangement of the phosphor and the arrangement of the transparent material are similar to the case of having two cavities as shown in fig. 7 and 8, and so on, and thus will not be described herein again.
Therefore, when the dichroic member 205 is moved to a different position by the driving member 205a, the dichroic member 205 may reflect the light beam output from the first light focusing member 204 onto the light-transmitting through hole 70 on the wavelength conversion member 207 or onto the light-transmitting material on the top of the corresponding cavity.
When a light beam is reflected onto the light-transmitting through hole 70, the light beam will be directly transmitted onto the third light-condensing element 208 by the light-transmitting through hole 70, and the third light-condensing element 208 outputs the light beam with the first wavelength to the mirror group 210, and outputs the light beam with the first wavelength to the dichroic element 205 after being reflected and condensed by the mirror group 210, and then the light beam with the first wavelength is reflected to the light-receiving element 209 by the dichroic element 205;
when the light beam is reflected to the light-transmitting material on the top of the corresponding cavity, the light beam is transmitted into the corresponding cavity and irradiates the fluorescent powder at the bottom of the corresponding cavity, so that the fluorescent powder is excited to output a laser beam with corresponding wavelength; after the laser beam is reflected by the high-reflection film on the inner wall of the corresponding cavity, the light-transmitting material on the top of the corresponding cavity is transmitted out of the corresponding cavity, and then is output to the second condensing part 206; and the second light condensing part 206 outputs the light beam output from the wavelength conversion part 207 to the dichroic part 205, and transmits to the light receiving part 209 through the dichroic part 205.
For example, with the plurality of specified positions including only the first position, the second position, and the third position, only two cavities are provided in the wavelength converting member 207: a first cavity 71 and a second cavity 72, wherein the first position corresponds to the light-transmitting through hole 70, the second position corresponds to the first cavity 71, and the third position corresponds to the second cavity 72:
when the dichroic member 205 is moved to the first position by the driving member 205a, the dichroic member 205 may reflect the light beam having the first wavelength output from the first light focusing member 204 onto the light transmitting through hole 70 on the wavelength converting member 207, so as to be directly transmitted to the third light focusing member 208 through the light transmitting through hole 70; the third condensing element 208 can output the light beam with the first wavelength to the mirror group 210; the mirror group 210 reflects and converges the light beam with the first wavelength and outputs the light beam to the dichroic component 205; the dichroic element 205 reflects the light beam having the first wavelength to the light receiving element 209 as a first usable light source.
When the dichroic member 205 is moved to the second position by the driving member 205a, the dichroic member 205 can reflect the light beam with the first wavelength output by the first light focusing member 204 onto the first light transmissive material 710 on the top of the first cavity 71 on the wavelength conversion member 207, so as to transmit into the first cavity 71 and irradiate onto the second wavelength phosphor 711 on the bottom of the first cavity 71, so that the second wavelength phosphor 711 is excited to output the second light beam with the second wavelength; after being reflected by the highly reflective film 73 on the inner wall of the first cavity 71, the second light beam is transmitted out of the first cavity 71 from the first light-transmitting material 710 on the top of the first cavity 71 and then output to the second light-focusing component 206; the light beam having the second wavelength is output to the dichroic element 205 by the second condensing element 206; the dichroic member 205 transmits the light beam having the second wavelength to the light receiving member 209 as a second usable light source.
Similarly, when the dichroic member 205 is driven by the driving member 205a to move to the third position, the dichroic member 205 can reflect the light beam with the first wavelength output by the first light-focusing member 204 onto the second light-transmitting material 720 on the top of the second cavity 72 on the wavelength conversion member 207, so as to transmit the light beam into the second cavity 72 and irradiate the light beam onto the third wavelength phosphor 721 at the bottom of the second cavity 72, so that the third wavelength phosphor 721 is excited to output a third light beam with a third wavelength; after being reflected by the highly reflective film 73 on the inner wall of the second cavity 72, the third light beam is transmitted out of the second cavity 72 from the second light-transmitting material 720 on the top of the second cavity 72, and then is output to the second light-focusing component 206; the light beam having the third wavelength is output to the dichroic member 205 by the second condensing member 206; the dichroic element 205 transmits the light beam having the third wavelength to the light receiving element 209 as a third available light source.
By analogy, if the plurality of designated positions includes N positions, and the wavelength conversion component 207 is provided with light-transmitting through holes and (N-1) cavities corresponding to the N positions one by one, respectively, the light receiving component 209 can receive light beams of N different wavelengths when the dichroic component 205 moves to N different positions under the driving of the driving component 205 a. The detailed process is not described herein.
Preferably, in an embodiment of the present invention, a heat sink 74 is further disposed below each cavity of the wavelength conversion component 207 for dissipating heat of the entire wavelength conversion component 207.
In addition, as shown in fig. 2, 4, 5 and 6, in a preferred embodiment of the present invention, the light receiving part 209 may include: a fifth condenser lens 209a and a light rod 209 b;
the fifth condenser lens 209a is configured to perform a condensing process on the light beam entering the fifth condenser lens 209 a;
the light rod 209b is configured to collect the light beam condensed by the fifth condensing lens 209 a.
Preferably, in an embodiment of the present invention, the light receiving part 209 may be: a fly-eye lens; the fly-eye lens is used for receiving and collecting the light beam entering the fly-eye lens.
According to the structure of the light source device, in the technical scheme of the invention, one dichroic component capable of rotating to a plurality of different specified positions is used in the light source device, so that the light beams output by the first laser light source can be reflected to the light-transmitting through holes of the wavelength conversion component or the light-transmitting materials of different cavities, different cavities of the wavelength conversion component are stimulated to output light beams with different wavelengths, and different available light sources are formed. For example, when the designated positions of the dichroic members are the first position, the second position, and the third position, the corresponding 3 available light sources are available: a first available light source, a second available light source, and a third available light source. When the plurality of designated positions of the dichroic member are N positions, a corresponding N number of available light sources are obtained. Since the fluorescent wheel and the rotary motor are not required to be used in the above light source device, a dichroic member that can be moved to a plurality of designated positions is used. Therefore, the problem that the position of the fluorescent wheel is moved when a rotating motor is used, and further the light source generates periodic brightness change is effectively avoided, and the projection quality can be greatly improved. Moreover, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
In addition, in an aspect of the present invention, there is provided a light source generating method for a light source device including a first laser light source, a collimating component, a reflecting component, a first condensing component, a dichroic component, a driving component, a second condensing component, a wavelength converting component, a third condensing component, a light receiving component, and a reflective turning mirror group, the method including:
the collimation component is used for collimating a first light beam with a first wavelength output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to the first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
when the dichroic member is located at a first position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam reflected by the dichroic component and outputs the converged light beam to the wavelength conversion component; the wavelength conversion component transmits the received light beam having the first wavelength to the third light condensing component; the third light condensing component outputs the light beam with the first wavelength output by the wavelength conversion component to the reflector group; the reflecting mirror group reflects and converges the light beam with the first wavelength output by the third light condensing component and outputs the light beam to the dichroic component; the dichroic component reflects the light beam with the first wavelength output by the reflection steering mirror group to the light receiving component;
when the dichroic member is located at the second position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a second light beam with a second wavelength according to the received light beam with the first wavelength in a stimulated mode, and outputs the second light beam to the second light condensation component; the second condensing part outputs the light beam having the second wavelength output from the wavelength conversion part to the dichroic part; the dichroic part transmits the light beam having the second wavelength output from the second light condensing part to the light receiving part;
when the dichroic member is located at a third position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a third light beam with a third wavelength according to the received light beam with the first wavelength in an excited mode, and outputs the third light beam to the second light condensation component; the second condensing part outputs the light beam having the third wavelength output from the wavelength conversion part to the dichroic part; the dichroic component transmits the light beam with the third wavelength output by the second light-focusing component to the light-receiving component.
In addition, the invention further provides a laser projector.
Fig. 9 is a schematic diagram of a laser projector in an embodiment of the present invention. As shown in fig. 9, the laser projector in the embodiment of the present invention includes: an optical-mechanical module 901, a control module 903, a power driving module 902 and the light source device 900 as described above;
the optical-mechanical module 901 is composed of a uniform-light illumination component, a display chip and a projection lens;
the light source device 900 provides a usable light source for the laser projector;
the optical-mechanical module 901 receives the light source provided by the light source device 900, wherein the light-homogenizing illumination component homogenizes the light source further, the display chip generates a picture under the real-time control of the control module 903, and the generated picture is projected out of the picture to be displayed through the projection lens;
the power driving module 902 provides driving power for the light source device 900 and the display chip.
In summary, in the light source device, the light source generating method and the laser projector including the light source device provided in the present invention, since one dichroic member that can rotate to a plurality of designated positions is used in the light source device, the light beam output by the first laser light source can be reflected onto the wavelength conversion member, so that the wavelength conversion member can output light beams of a plurality of required wavelengths to the light receiving member according to the positions of the dichroic member, thereby forming a plurality of different available light sources. Because the light source device does not use the fluorescent wheel and the rotating motor, but uses the dichroic component which can move to a plurality of specified positions and the wavelength conversion component which can output light beams with a plurality of wavelengths according to the positions of the dichroic component, the problem that the position of the fluorescent wheel moves when the rotating motor is used, and further the light source generates periodic brightness change can be effectively avoided, and the quality of a projection picture is greatly improved. Moreover, the structure of the light source device is simple, so that the light source system is effectively simplified, the assembly and adjustment efficiency is improved, and the potential safety hazard of using a high-speed rotating motor is also solved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A light source device, comprising: the device comprises a first laser light source, a collimation component, a reflection component, a first light condensation component, a dichroic component, a driving component, a second light condensation component, a wavelength conversion component, a third light condensation component, a light receiving component and a reflection steering mirror group; wherein,
the first laser light source is used for outputting a first light beam with a first wavelength to the collimation component;
the collimation component is used for collimating the received first light beam to obtain a parallel light beam and outputting the parallel light beam to the reflection component;
the reflecting component is used for reflecting the parallel light beams to the first light focusing component;
the first light-gathering component is used for gathering the received parallel light beams and outputting the light beams to the dichroic component;
the driving component is used for moving the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
the dichroic component is used for reflecting the light beam output by the first light-gathering component to the second light-gathering component; transmitting the received light beam output by the second light-condensing part to the light-receiving part; reflecting the light beams output by the reflection steering mirror group to the light receiving component;
a second condensing part for condensing the received light beam reflected by the dichroic part and outputting the light beam to the wavelength conversion part; outputting the received light beam output by the wavelength conversion member to the dichroic member;
the wavelength conversion member is used for transmitting the received light beam with the first wavelength to the third light condensing member when the dichroic member is positioned at the first position; when the dichroic component is located at the second position, a second light beam with a second wavelength is output according to the received light beam in a stimulated mode, and the second light beam is output to a second light condensing component; the dichroic component is used for outputting a first light beam with a first wavelength according to the received light beam, and outputting the first light beam to the first light-focusing component;
the third light condensing component is used for condensing the received light beam and outputting the light beam to the reflector group;
and the reflector group is used for reflecting and converging the light beams output by the third light condensing component and then outputting the light beams to the dichroic component.
2. The light source device of claim 1, wherein the set of reflectors comprises: the device comprises a first reflector, a second reflector, a third reflector, a first steering mirror, a second steering mirror and a third steering mirror;
the first reflector is used for reflecting the light beam output by the third light-condensing component to the first steering mirror;
the first steering mirror is used for converging the light beam output by the first reflecting mirror and outputting the light beam to the second reflecting mirror;
the second reflector is used for reflecting the light beam output by the first steering mirror to the second steering mirror;
the second steering mirror is used for converging the light beam output by the second reflecting mirror and outputting the light beam to the third reflecting mirror;
the third reflector is used for reflecting the light beam output by the second steering mirror to the third steering mirror;
the third steering mirror is used for converging the light beam output by the third reflecting mirror and outputting the light beam to the dichroic component.
3. The light source device according to claim 1, wherein:
the driving member is connected to the dichroic member through a driving shaft.
4. A light source device according to claim 1 or 3, wherein:
the driving part is a driving motor.
5. The light source device according to claim 1, wherein the wavelength conversion member includes at least: the light-transmitting through hole corresponds to the first position, the first cavity corresponds to the second position and the second cavity corresponds to the third position; wherein,
the light-transmitting through hole is used for transmitting a light beam with a first wavelength;
high-reflection films are arranged on the inner walls of the first cavity and the second cavity;
a first light-transmitting material with a preset area is arranged on the high-reflection film at the top of the first cavity; the high-reflection film at the bottom of the first cavity is coated with second wavelength fluorescent powder for stimulated output of a second light beam with a second wavelength;
a second light-transmitting material with a preset area is arranged on the high-reflection film at the top of the second cavity; and the high-reflection film at the bottom of the second cavity is coated with third-wavelength fluorescent powder for stimulated output of a third light beam with a third wavelength.
6. The light source device according to claim 5, wherein:
a heat sink is disposed below each cavity of the wavelength converting member.
7. The light source device according to claim 1, wherein the light receiving part comprises: a fifth condenser lens and a light rod; wherein,
the fifth condenser lens is used for carrying out convergence processing on the light beam entering the fifth condenser lens;
and the light bar is used for collecting the light beams subjected to the convergence processing by the fifth condenser lens.
8. The light source device according to claim 1, wherein:
the light receiving part is a fly-eye lens.
9. A light source generating method for use in a light source device including a first laser light source, a collimating component, a reflecting component, a first condensing component, a dichroic component, a driving component, a second condensing component, a wavelength converting component, a third condensing component, a light receiving component, and a reflective turning mirror group, the method comprising:
the collimation component is used for collimating a first light beam with a first wavelength output by the first laser light source to obtain a parallel light beam;
reflecting, by the reflecting means, the parallel light beams to a first light condensing means;
the first light-gathering component gathers the received parallel light beams and outputs the light beams to the dichroic component;
moving, by the drive component, the dichroic component to a plurality of specified positions according to a control instruction; wherein the plurality of designated locations includes at least: a first position, a second position, and a third position;
when the dichroic component is located at the first position, the dichroic component reflects the light beam with the first wavelength output by the first light-condensing component to the second light-condensing component; the second light condensation component converges the light beam reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion part transmits the received light beam having the first wavelength to the third light condensing part; the third light condensing component outputs the light beam with the first wavelength output by the wavelength conversion component to the reflector group; the reflecting mirror group reflects and converges the light beam with the first wavelength output by the third light condensing component and outputs the light beam to the dichroic component; the dichroic component reflects the light beam with the first wavelength output by the reflection steering mirror group to the light receiving component;
when the dichroic component is located at the second position, the dichroic component reflects the light beam with the first wavelength output by the first light-condensing component to the second light-condensing component; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a second light beam with a second wavelength according to the received light beam with the first wavelength in a stimulated mode, and outputs the second light beam to the second light condensation component; a second condensing part outputs the light beam having the second wavelength output from the wavelength conversion part to the dichroic part; the dichroic part transmits the light beam having the second wavelength output from the second light-condensing part to the light-receiving part;
when the dichroic member is located at the third position, the dichroic member reflects the light beam having the first wavelength output by the first light condensing member to the second light condensing member; the second light condensation component converges the light beam with the first wavelength reflected by the dichroic component and outputs the light beam to the wavelength conversion component; the wavelength conversion component outputs a third light beam with a third wavelength according to the received light beam with the first wavelength in a stimulated mode, and outputs the third light beam to a second light condensation component; a second condensing part outputs the light beam having the third wavelength output from the wavelength conversion part to the dichroic part; and the dichroic component transmits the light beam with the third wavelength output by the second light-focusing component to the light-receiving component.
10. A laser projector, comprising: opto-mechanical module, control module, power driving module and light source device according to one of claims 1 to 8, wherein,
the optical-mechanical module consists of a uniform illumination component, a display chip and a projection lens;
the light source device provides a usable light source for the laser projector;
the optical-mechanical module receives a light source provided by the light source device, the dodging illumination component further dodges the light source, the display chip generates a picture under the real-time control of the control module, and the generated picture is projected to form a picture to be displayed through the projection lens.
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| CN201310089522.9A CN103186025B (en) | 2013-03-19 | 2013-03-19 | Light source device, light source generation method and laser projector with light source device |
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| CN103186025B (en) | 2015-04-29 |
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