JP2002270004A - Multiple light source lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple light source lighting system having an extended service life, capable of emitting uniformly distributed rays, effectively dispersing heat generating sources, and easily eliminating a heat source. SOLUTION: This multiple light source lighting system includes a light source unit in which many lamps are provided, and each lamp projects a parallel ray toward a photo processor, a lens or a lens set interposed between the light source unit and the photo processor to focus the parallel ray projected by each lamp on one focus, and an integrator which is provided between the lens and the photo processor and is equipped with the plane of incidence positioned at the focus point of the ray focused by the lens and an emitting plane facing the photo processor and emitting uniformly distributed rays.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a multi-source illumination device, and more particularly to an illumination device capable of providing illumination necessary for processes such as spectral, modulation, mixing, and imaging in a general projection display.

[0002]

2. Description of the Related Art A general projection display or the like mostly uses light emission of an illuminating device to advance processes such as spectroscopy, modulation, mixing, and imaging. The emission from the two light sources is put into the photo processor of the projection display,
Performs processes such as mixing and imaging, and the photo processor is a facility that can perform more advanced processing for light sources such as light collectors, spectrometers, and P / S converters, although this differs depending on the design method. . Also, the choice of illumination brightness should be made using a light source with relatively low power, if the demand for display brightness is not very high,
In this case, the heat generated by the light source during use of the projection display is limited and easy to process, but if the display requires relatively high brightness, increase the power of the only one light source. The required brightness must be accommodated, so a single light source has the disadvantage that it generates high temperatures under high wattage, and the heat sources are concentrated and heat is not easily dissipated.

[0003]

In other words, how to obtain a high luminance while improving the problem of difficulty in processing a high temperature generated by an illumination device can be solved by manufacturing an illumination device used for a projection display. SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-source lighting device that emits light uniformly distributed, effectively disperses a heat source, and can easily eliminate a heat source, and has an improved service life. I do.

[0004]

In order to achieve the above object, the present invention provides a lighting device for providing illumination for imaging to a photo processor of a projection display. A light source unit for projecting a parallel light beam toward a processor, a lens interposed between the light source unit and the photoprocessor, for focusing the parallel light beam projected from each of the lamps to one focal point, the lens and the photo And a columnar glass integrator provided between the processor and the lens, the lens including an entrance surface positioned at the focal point of the focused light beam and an exit surface for emitting a uniform light source opposite the photoprocessor. .

Further, a light source unit having a plurality of lamps, each of the lamps projecting parallel rays toward a photo processor, and a light source unit interposed between the light source unit and the photo processor, and A first lens that focuses a parallel light beam to be projected to a front focal point, a second lens that is interposed between the first lens and a photo processor and that can refract light, and the second lens. A columnar glass integrator provided between the photo processor and receiving the light beam facing the second lens and having an exit surface for emitting a uniform parallel light beam facing the photo processor; It consists of.

[0006] The second lens is a negative lens type that disperses light rays, or the second lens is a positive lens type that can focus light rays, and the focal position of the first lens is changed. It is even more preferable to position the lens between the first and second lenses.

The present invention constructed as described above focuses light rays emitted from a large number of equally-spaced lamps using a lens or a lens set to one focal point, and uses a columnar glass integrator. The focused light beam can be converted into a uniform light beam and projected from the exit surface to the photo processor of the projection display. That is, since a large number of low power lamps can be arranged at equal intervals to generate light beams having high brightness and being distributed in parallel, heat radiation is easier than in the case where a conventional single light source having a high wattage is used. . Further, since the luminance of the display is obtained by a large number of light sources, even if one of the light sources is broken, the luminance is slightly lowered and the light source does not disappear at all.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments, but the present invention is not limited to these examples.

As shown in FIGS. 1 and 2, a lighting device 1 according to a preferred embodiment of the present invention is provided in front of a photo processor 10 of a projection display to provide necessary illumination when the projection display performs imaging. Things. In this embodiment, the photo processor 10 may be a telescoping lens 101 and a light valve 102, but since the photo processor 10 differs depending on the required functions, the photo processor 10 may include a P / S converter, a condenser lens, a spectral lens, or the like. It may be a facility that can be used for processes such as modulation, photosynthesis, imaging, etc., and the photoprocessor 10 is a conventionally known technique and has no relation to the features of the present invention. Omit.

The lighting device 1 of the present embodiment includes a light source unit 2,
A lens 3 and a columnar glass integrator 4 are included. Light source unit 2
Comprises a number of side lamps 21 in an evenly spaced annular arrangement, and a central lamp 22 attached to the center of the side lamps 21;
The arrangement of the lamps 21 and 22 may be a honeycomb arrangement, and is not limited to the embodiment disclosed in this embodiment. The structures of the side lamp 21 and the center lamp 22 are the same, and only the side lamp 21 will be described below as an example. That is, each side lamp 21 has a parabolic lighting cover 211, and the lighting cover 211 has an opening 212 facing the photo processor 10, and
A light source mounting portion 213 is provided on a side far from the opening 212, a light emitting lamp 214 is mounted on the light source mounting portion 213, and a parabolic reflecting mirror surface 215 for reflecting light on the inner surface of each lighting cover 211 and projecting it as parallel light rays. To form

The lens 3 is provided between the light source unit 2 and the photo processor 10 and may be a single positive lens or a lens set formed by combining a large number of lenses. 215 reflective mirrors each
Are focused to a single focal point 31.

The columnar glass integrator 4 has a columnar glass structure or a columnar hollow structure coated with a reflective film on the inside.
Provided between the lens 3 and the photoprocessor 10, the light receiving surface 41 and the light exit surface 42 are provided on both end surfaces in parallel with each other, and at the same time, the light incident surface 41 faces the lens 3, and the lens The focal point 31 focusing the three rays is just the entrance surface 41
The exit surface 42 faces the photoprocessor 10, and converts the light beam focused on the entrance surface 41 by the integrator 4 into a light source having a uniform distribution and emits the light from the exit surface 42.

As can be seen from the above description, this embodiment uses the lens 3 or the lens set to focus the light rays emitted from the many lamps 21 and 22 to one focal point 31 and to focus the light rays by the columnar glass integrator 4. The emitted light is converted into a uniform light and emitted from the emission surface 42. This structure can certainly generate a high intensity and uniformly parallel light beam by using a large number of low power lamps 214, provide a relatively high intensity illumination to the projection display, and at the same time, provide the entire light source unit 2 Low power lamps 2 are provided at equal intervals.
Since 14 can be employed, the heat generated by the light source unit 2 can be effectively dispersed, and the disadvantage that high-temperature heat radiation that occurs when a single light source having a high wattage is used is not easy can be overcome. In addition, since the projection luminance of the present invention is provided by a large number of light sources, even if any one of the multiple light sources is broken, the luminance of the display is only slightly lowered and the light source is completely turned off. As a result, the service life of the light source of the projection display can be increased.

As shown in FIG. 3, the illumination device 5 of the second preferred embodiment of the present invention can similarly project light rays to a photo processor 50 of a projection display. Lighting equipment
5 includes a light source unit 51, the light source unit 51 includes a lamp 511 that emits a large number of parallel rays, and a first lens 52, a second lens 53, and a lens between the light source unit 51 and the photo processor 50 in order. With a matrix integrator 54
The one lens 52 may be a single positive lens or a lens set having many positive lens functions, and can converge the parallel rays emitted from the lamp 511. The second lens 53 may be a single negative lens or a lens set having a negative lens function, and the light transmitted through the first lens 52 is dispersed into parallel light through the refraction of the second lens 53. Is done. Further, the light is projected on the lens matrix integrator 54. The integrator 54 includes matrix integrating lenses 541 and 542 corresponding to each other, and forms the surface of the matrix integrating lens 541 facing the second lens 53 on the incident surface 543, while defining the surface of the matrix integrating lens 542 facing the photoprocessor 50. The first and second lenses 52 and 53 and the integrator 5 are formed on an emission surface 544 for emitting a light source having a uniform distribution.
By combining with 4, the parallel light rays similarly emitted from many lamps 511 are formed into light rays with uniform distribution,
50, the heat generated by the lamp when using a high-luminance light beam is evenly distributed to quickly and conveniently radiate heat.

As shown in FIG. 4, a lighting device 6 according to a third preferred embodiment of the present invention also includes a light source unit 61 formed by a large number of lamps 611, and a light source unit 61 near the light source unit 61.
1 lens 62, 2nd lens 6 corresponding to 1st lens 62
3 and a lens matrix integrator 64, which is different from the second embodiment in that the first and second lenses 62 and 63 are both positive lenses having a condensing function, and both lenses 62 and 63 The distance between them is longer than the position of the focal point 65 formed by the parallel rays emitted from the lamp 611 through the first lens 62, and thereby the lamp 6
The parallel rays emitted from 11 pass through the first lens 62 and are focused on the focal point 65, and diverge again from the focal point 65 to the second lens 6
The light is dispersed into parallel rays via 3 and projected onto the lens matrix integrator 64, and finally, a light source having a uniform distribution is emitted from the exit surface 641 of the lens matrix integrator 64.

[0016]

As can be seen from the above, the present invention provides a light source having a uniform distribution, and at the same time is provided by a plurality of low-power lamps arranged at appropriate intervals. Even under the same luminance, the heat generated by the entire lamp can be dispersed and radiated much more easily than the single light source. In addition, since the brightness of the display is provided by a large number of light sources, even if any of the many light sources is broken, the brightness is only slightly reduced, and the light source does not disappear at all, and the service life of the light source of the projection display is used. Can be increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing the relationship between a first preferred embodiment of the present invention and a photo processor of a projection display.

FIG. 2 is a front view of the light source unit in the first embodiment.

FIG. 3 is a diagram showing the relationship between a second preferred embodiment of the present invention and a photo processor of a projection display.

FIG. 4 is a diagram showing a relation between a third preferred embodiment of the present invention and a photo processor of a projection display.

[Explanation of symbols]

 1, 5, 6 Lighting device 10, 50 Photoprocessor 2, 51, 61 Light source unit 21 Side lamp 211 211 Lighting cover 212 Opening 213 Light source mounting part 214 Lamp 215 Reflecting mirror surface 22 Central lamp 3 Lens 31, 65 Focus 4 Columnar shape Glass integrator 41, 543 Incident surface 42, 544, 641 Exit surface 511, 611 Lamp 52, 62 First lens 53, 63 Second lens 54, 64 Lens matrix integrator 541, 542 Matrix integrating lens

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // F21Y 101: 00

Claims (4)

[Claims] 1. An illumination device for providing illumination during imaging to a photo processor of a projection display, comprising: a light source unit having a plurality of lamps, each of which emits a parallel light beam toward the photo processor; A lens that is interposed between the light processor and the photo processor and focuses the parallel light beams projected from each of the lamps to a single focal point; a light beam that is provided between the lens and the photo processor and is focused by the lens. A multi-source illumination device comprising: an entrance surface positioned at a focal point; and a columnar glass integrator having an exit surface for emitting a uniform light source opposite the photoprocessor. 2. An illumination device for providing illumination during imaging to a photo processor of a projection display, comprising: a light source unit having a plurality of lamps, each of which emits a parallel light beam toward the photo processor; And a first lens that is interposed between the first lens and the photo processor, and a first lens that converges the parallel rays projected by each of the lamps to a forward focal point. A second lens capable of refracting light; a light receiving surface provided between the second lens and the photoprocessor for receiving light in opposition to the second lens; A multi-source lighting device comprising: a columnar glass integrator having an exit surface for emitting a parallel light beam. 3. The multi-source lighting device according to claim 2, wherein the second lens is of a negative lens type for dispersing light rays. 4. The second lens is a positive lens type capable of converging a light beam, and a focal position of the first lens is localized between the first and second lenses. The multi-source lighting device according to claim 1.