CN2593234Y - LCOS liquid crystal panel lighting apparatus - Google Patents
LCOS liquid crystal panel lighting apparatus Download PDFInfo
- Publication number
- CN2593234Y CN2593234Y CN 02288420 CN02288420U CN2593234Y CN 2593234 Y CN2593234 Y CN 2593234Y CN 02288420 CN02288420 CN 02288420 CN 02288420 U CN02288420 U CN 02288420U CN 2593234 Y CN2593234 Y CN 2593234Y
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- CN
- China
- Prior art keywords
- fly lens
- liquid crystal
- lens
- lcos liquid
- crystal board
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- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model relates to an LCOS liquid crystal panel lighting apparatus, which belongs to the technical field of liquid crystal projectors. A light source 1, a paraboloid reflective mirror 2, an ultraviolet filter 6, a front fly lens 3, a reflective mirror 7, a rear fly lens 4, a polarized piece group 8, a collecting mirror 5 and an LCOS liquid crystal panel 10, which are arranged in a light source box 9, are ranged along a main light shaft of the lighting apparatus, wherein, the front fly lens 3 is a compound convergence type fly lens which is composed of a fly lens array and a convex lens; the reflective mirror 7 is a cold reflective mirror; the front fly lens 3, the collecting mirror 5 and the rear fly lens 4 form a conjugating variable magnification system. The utility model has the advantage that the LCOS liquid crystal panel 10 is made to have the advantages of high brightness, high lighting uniformity and low temperature rise.
Description
Technical field
The utility model relates to a kind of LCOS liquid crystal board illumination device, belongs to the liquid crystal projector technical field.
Background technology
Existing LCOS liquid crystal board illumination device as liquid crystal light valve, adopts general optical system with the LCOS liquid crystal board, and the light intensity of the illuminating bundle of this system is pressed the Gaussian function rule and distributed, and the phenomenon that the projected picture middle part is brighter, the edge is darker must occur.The LCOS liquid crystal board is very fragile, and under strong illumination, temperature surpasses 60 ℃ for a long time, just can burn out.Add that the LCOS liquid crystal board allows a kind of light of polarization direction pass through, therefore the luminous energy of sending from the lamp source can only be utilized half.A kind of back-projecting liquid crystal TV set is arranged in the background technology, this TV adopts pair of plates type fly_eye lens array that the LCOS liquid crystal board is thrown light on: the illuminating bundle that send in the lamp source projects first group of fly_eye lens array (preceding fly lens), form a plurality of lampets source, be imaged onto again on second group of fly_eye lens array (back fly lens), form a plurality of lamp source images, and then through condenser illumination LCOS liquid crystal board.The advantage of this background technology is to improve the efficiency of light energy utilization in lamp source, and shortcoming is that the aberration and the thermal value of illuminator itself limited the efficiency of light energy utilization in lamp source and the further raising of illumination uniformity.
Summary of the invention
The purpose of this utility model provides a kind of LCOS liquid crystal board illumination device, and this device does not have the shortcoming of background technology.The utility model adopts following structure that above-mentioned purpose is achieved.Now be described with reference to the accompanying drawings the structure of the related device of the utility model: a kind of LCOS liquid crystal board illumination device, by lamp source 1, parabolic reflector 2, ultraviolet filter 6, preceding fly lens 3, reflective mirror 7, back fly lens 4, polarizer group 8, condenser 5, light-source box 9 and LCOS liquid crystal board 10 are formed, be installed in the light-source box 9, lamp source 1, parabolic reflector 2, ultraviolet filter 6, preceding fly lens 3, reflective mirror 7, back fly lens 4, polarizer group 8, condenser 5 and LCOS liquid crystal board 10 are arranged along the primary optical axis of this lighting device successively, it is characterized in that, the compound convergence type fly lens that preceding fly lens 3 is made up of fly_eye lens array and convex lens, reflective mirror 7 is cold mirrors, and preceding fly lens 3 is formed conjugation variable power system with condenser 5 and back fly lens 4.
Principle of work.In Fig. 1, lamp source 1 places on the focus of parabolic reflector 2.The light that send in lamp source 1 is before parabolic reflector 2 projects abreast on fly lens 3 arrays.One side at preceding fly lens 3 arrays adds convex lens, the compound convergence type fly lens of composition.This compound lens has increased the wrapping angle in lamp source 1 and convergence of rays degree, thereby has improved the efficiency of light energy utilization in lamp source 1.Back fly lens 4 is positioned at the place, focal plane of above-mentioned compound lens, and the illuminating bundle in lamp source 1 is imaged onto on the array of back group fly lens 4 by each lens cells of preceding fly lens 3 arrays, forms a plurality of lamp source images.LCOS liquid crystal board 10 equably throws light on after condenser 5 is assembled a plurality of lamp source images.Because whole big light beam is divided into a plurality of light pencils and throws light on, and the inevitable homogeneity greater than whole big light beam of the homogeneity of each light pencil, mutual gathering because of adjacent light pencil superposes again, make the trickle inhomogeneous performance of each light pencil obtain further compensation, thereby adopt this fly_eye lens array that more even more effectively the obtaining of luminous energy in the whole large aperture utilized.Simultaneously, before fly lens 3 add that convergence performance that convex lens have has increased the wrapping angle to lamp source 1, the focal length of back fly lens 4 lens cells is less than the focal length of preceding fly lens 3 lens cells, illumination light pencil convergent angle is increased, hot spot diminishes, it is big that energy density becomes, thereby make LCOS liquid crystal board 10 obtain high brightness.The focal plane place of fly lens 3 before back fly lens 4 is positioned at, the more preceding fly lens of physical dimension 3 is slightly little, add condenser 5 after, constitute conjugation variable power systems with preceding fly lens 3.By adopting the condenser 5 of different focal, can make LCOS liquid crystal board 10 do forr a short time, the optical energy density that converges on the LCOS liquid crystal board 10 improves, and brightness increases thereupon.The lens cells of back fly lens 4 is arranged in off-axis shape mode in the central authorities and the marginal portion of array, has reduced aberration with other parts of entire lighting device, thereby has improved the homogeneity of illumination.In illumination path, add ultraviolet filter 6 and the surperficial reflective mirror 7 that is coated with the infrared Absorption film, only allow useful visible light efficient pass through, help to reduce the temperature rise of LCOS liquid crystal board 10 under strong illumination.
The beneficial effects of the utility model are to have improved the efficiency of light energy utilization and the illumination uniformity of whole illuminator, make LCOS liquid crystal board 10 have high brightness of illumination, high illumination uniformity and low temperature rise.
Description of drawings
Fig. 1 is an optical schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Embodiment
A kind of LCOS liquid crystal board illumination device with said structure is characterized in that, the size of more preceding fly lens 3 arrays of the size of back fly lens 4 arrays is little, the place, focal plane of fly lens 3 before back fly lens 4 is positioned at.
A kind of LCOS liquid crystal board illumination device with said structure or embodiment 1 described structure is characterized in that reflective mirror 7 is cold mirrors that the surface is coated with the infrared Absorption film.
A kind of LCOS liquid crystal board illumination device with said structure or embodiment 1 described structure or embodiment 2 described structures is characterized in that the central authorities of back fly lens 4 arrays and the lens cells of marginal portion are arranged in off-axis shape mode.
The utility model is particularly suitable for being used in the liquid crystal projector lighting device as the LCOS liquid crystal board.
Claims (4)
1. LCOS liquid crystal board illumination device, by lamp source (1), parabolic reflector (2), ultraviolet filter (6), preceding fly lens (3), reflective mirror (7), back fly lens (4), polarizer group (8), condenser (5), light-source box (9) and LCOS liquid crystal board (10) are formed, be installed in the light-source box (9), lamp source (1), parabolic reflector (2), ultraviolet filter (6), preceding fly lens (3), reflective mirror (7), back fly lens (4), polarizer group (8), condenser (5) and LCOS liquid crystal board (10) are arranged along the primary optical axis of this lighting device successively, it is characterized in that, the compound convergence type fly lens that preceding fly lens (3) is made up of fly_eye lens array and convex lens, reflective mirror (7) is a cold mirror, and preceding fly lens (3) is formed conjugation variable power system with condenser (5) and back fly lens (4).
2. LCOS liquid crystal board illumination device according to claim 1 is characterized in that, the size of the more preceding fly lens of size (3) array of back fly lens (4) array is little, and back fly lens (4) is positioned at the place, focal plane of preceding fly lens (3).
3. LCOS liquid crystal board illumination device according to claim 1 and 2 is characterized in that, reflective mirror (7) is the cold mirror that the surface is coated with the infrared Absorption film.
4. according to claim 1 or 2 or 3 described LCOS liquid crystal board illumination devices, it is characterized in that the central authorities of back fly lens (4) array and the lens cells of marginal portion are arranged in off-axis shape mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288420 CN2593234Y (en) | 2002-12-18 | 2002-12-18 | LCOS liquid crystal panel lighting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288420 CN2593234Y (en) | 2002-12-18 | 2002-12-18 | LCOS liquid crystal panel lighting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2593234Y true CN2593234Y (en) | 2003-12-17 |
Family
ID=33748324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02288420 Expired - Fee Related CN2593234Y (en) | 2002-12-18 | 2002-12-18 | LCOS liquid crystal panel lighting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2593234Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7724220B2 (en) | 2006-01-12 | 2010-05-25 | Himax Display, Inc. | Driving system of light emitting diode |
| US8057068B2 (en) | 2008-08-21 | 2011-11-15 | All Real Technology Co., Ltd. | Artificial light source generator |
| CN101713494B (en) * | 2008-10-06 | 2012-11-14 | 乐利士实业股份有限公司 | Artificial light source generator |
| CN102155652B (en) * | 2008-10-06 | 2013-03-20 | 乐利士实业股份有限公司 | Artificial light source generator |
| CN103345066A (en) * | 2013-05-29 | 2013-10-09 | 芜湖雅图数字视频技术有限公司 | Apparatus for separating visible light from ultraviolet and infrared lights in projector |
| CN113820913A (en) * | 2021-08-27 | 2021-12-21 | 广东烨嘉光电科技股份有限公司 | Large-optical-path small-size fidelity type projection optical system and projection method thereof |
-
2002
- 2002-12-18 CN CN 02288420 patent/CN2593234Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7724220B2 (en) | 2006-01-12 | 2010-05-25 | Himax Display, Inc. | Driving system of light emitting diode |
| US8057068B2 (en) | 2008-08-21 | 2011-11-15 | All Real Technology Co., Ltd. | Artificial light source generator |
| CN101713494B (en) * | 2008-10-06 | 2012-11-14 | 乐利士实业股份有限公司 | Artificial light source generator |
| CN102155652B (en) * | 2008-10-06 | 2013-03-20 | 乐利士实业股份有限公司 | Artificial light source generator |
| CN103345066A (en) * | 2013-05-29 | 2013-10-09 | 芜湖雅图数字视频技术有限公司 | Apparatus for separating visible light from ultraviolet and infrared lights in projector |
| CN103345066B (en) * | 2013-05-29 | 2023-10-31 | 芜湖市安曼特微显示科技有限公司 | Visible light and ultraviolet infrared light separation device of projector |
| CN113820913A (en) * | 2021-08-27 | 2021-12-21 | 广东烨嘉光电科技股份有限公司 | Large-optical-path small-size fidelity type projection optical system and projection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |