CN2634506Y - Lighting system for optical engine and space light modulator - Google Patents
Lighting system for optical engine and space light modulator Download PDFInfo
- Publication number
- CN2634506Y CN2634506Y CN 03208859 CN03208859U CN2634506Y CN 2634506 Y CN2634506 Y CN 2634506Y CN 03208859 CN03208859 CN 03208859 CN 03208859 U CN03208859 U CN 03208859U CN 2634506 Y CN2634506 Y CN 2634506Y
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- light
- light source
- beam splitter
- polarizing beam
- eye lens
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Abstract
The utility model relates to a light source for optical engine, comprising a light source, an ellipsoidal reflective bowl whose light path is orderly provided with an integral chamber, an aspheric lens group, a polarized light splitter and a reflective mirror. An ultrahigh pressure mercury lamp is arranged in the ellipsoidal reflective bowl, the integral chamber is arranged at the second focus of the ellipsoidal reflective bowl, and the reflecting mirror is arranged on the reflective light path of the polarized light splitter. The light paths of the polarized light splitter and the reflective mirror are respectively provided with a plurality of lenses to constitute two-unit compound eye lens. The system can also make use of the light reflected by the wire-grating polarized light splitter. Compared with the original integral device structure, the utility model improves the efficiency by 90 percent. Compared with the original compound eye lens structure, the compound eye lens can have a higher efficiency because of excellent angle performance even though the less F value. Accordingly, the light source exceeds the efficiency of the original compound eye lens structure. Because the light source saves a multi-unit compound eye lens and a PBC, the cost of the illuminating system is reduced by more than 40 percent.
Description
Technical field
The utility model relates to a kind of light source, particularly a kind of illuminator that the light engine that uses in the liquid crystal projection apparatus is thrown light on of being used for, and the spatial light modulator of illumination.
Background technology
Light engine can be used for liquid crystal and digital-code projector, liquid crystal and digital rear-projection TV, and is their core component.Along with the expansion day by day in projector and rear-projection TV market, light engine has very considerable prospect.
According to incompletely statistics, projector's sales volume of China in 1997 is 8000, and 1998 annual turnovers then are near 20,000.2000 annual turnovers reach 6～70,000 and reached 120,000 in 2002.The average year increment rate surpasses 20%.
Light engine is on speaking terms than colored picture tube and colour TV with complete machine.It is the core component of the projection display, it greatly about and determined the indexs such as brightness, sharpness, contrast, brightness uniformity, excitation, distortion, cost, life-span of complete machine.Low-coat scale production light engine is the condition precedent that realizes the projection products industrialization.
Optical engine lighting system at home and abroad adopts fly's-eye lens to add the structure of polarisation converter (PBC) in general at present, realizes the even requirement of throwing light on and natural light being converted to polarized light.The advantage of this structure is the efficient height, and shortcoming is the cost height.The another kind of structure of illuminator is to adopt integrator to add the WG type polarizer.Its advantage is simple in structure, and cost is lower.Shortcoming is that efficient is low, and about 50% luminous energy is wasted.
The utility model content
At this situation, the purpose of this utility model provides a kind of efficiency of light energy utilization polarized illumination system simple in structure that improves.
The illuminator that is used for light engine of the present utility model, comprise light source, wherein light source is a ultrahigh pressure mercury lamp, also comprise the elliposoidal reflector, and the integration chamber is set according to this in its light path, the non-spherical lens group, polarizing beam splitter, catoptron, described ultrahigh pressure mercury lamp places the elliposoidal reflector, and described integration chamber is located at the second focus place of elliposoidal reflector, and described catoptron is arranged on the reflected light path of polarizing beam splitter, some lens are set respectively on the light path of polarizing beam splitter and catoptron, constitute two unit fly's-eye lenses.
The utility model is used for the illuminator of light engine, and wherein the inside surface of elliposoidal reflector is coated with cold emission light film.
The utility model is used for the illuminator of light engine, and wherein the polarizing beam splitter in the light source is the wire grid type polarizing beam splitter.
The utility model is used for the illuminator of light engine, and wherein the exit end in the polarizing beam splitter light path is provided with half-wave plate, to change the polarization direction of polarized light.
Spatial light modulation of the present utility model its, comprising above-mentioned any illuminator
The light engine advantage that the utility model is used for liquid crystal projection apparatus is: this programme has proposed a kind of novel illumination system.This system will also be used by the energy of wire grid type polarizing beam splitter WG reflection, compare with original integrator structure, and efficient improves about 90%.Compare with original fly's-eye lens structure, efficient low slightly (about 5%) when bigger F counts, owing to its excellent angular characteristics, efficient can surpass in reverse when less F counts.Therefore, can adopt less F number when using this illuminator, thereby improve the efficiency of light energy utilization, surpass the efficient of original fly's-eye lens structure.Owing to saved baroque polynary fly's-eye lens and PBC, made the cost of illuminator reduce more than 40%.
The utility model is used for other details of light engine of liquid crystal projection apparatus and characteristics can be cheer and bright by reading the embodiment that hereinafter encyclopaedizes in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the synoptic diagram that the utility model is used for liquid crystal projection apparatus light engine light source.
Embodiment
As shown in Figure 1, light source assembly 1 is made up of ultrahigh pressure mercury lamp 1a (UHP) and ellipsoid reflector 1b, and ultrahigh pressure mercury lamp 1a is located on first focus of ellipsoid reflector 1b, the reflector inside surface is coated with cold reflective membrane, reflect visible light, the transmission infrared radiation is with the temperature rise of control optical element.The light beam that ellipsoid reflecting surface 1b sends light source 1a focuses on the second focus place, and this place is provided with integration chamber 2, and light beam enters in the integration chamber 2, forms uniform light distribution at its exit end.Non-spherical lens group 3 is with beam collimation, and 4 is wire grid type polarizing beam splitter (WG), and transmission P polarized light reflects the S polarized light simultaneously.The heat resistance of WG is good, the more important thing is that angular characteristics is insensitive, is applicable to the system of less F number, helps improving the efficiency of light energy utilization.5 is catoptron, adjusts the S direction of light.6 and 9,7 and 10 constitute the fly's-eye lens of Unit two respectively, and lens 6 and 9 constitute the entrance pupil of illuminator.8 is half-wave plate, changes the P polarized light into the S polarized light.So far, realized beam uniformity and the natural light that light source sends is changed into the purpose of the polarized light of same polarization state.Make up with suitable relay lens group again, can realize the even illumination of polarized light spatial light modulator.
Claims (6)
1. illuminator that is used for light engine, comprise light source, it is characterized in that light source is ultrahigh pressure mercury lamp or other pointolites, also comprise the elliposoidal reflector, and in its light path, set gradually the integration chamber, the non-spherical lens group, polarizing beam splitter, catoptron, described ultrahigh pressure mercury lamp places the elliposoidal reflector, and described integration chamber is located at the focus place of elliposoidal reflector, described catoptron is arranged on the reflected light path of polarizing beam splitter, some lens are set respectively on the light path of polarizing beam splitter and catoptron, constitute two unit fly's-eye lenses
2. illuminator according to claim 1 is characterized in that the inside surface of elliposoidal reflector is coated with cold emission light film.
3. illuminator according to claim 1 and 2 is characterized in that the polarizing beam splitter in the light source is the wire grid type polarizing beam splitter.
4. illuminator according to claim 3 is characterized in that being provided with half-wave plate at the exit end of polarizing beam splitter light path, to change the polarization direction of polarized light.
5. a spatial light modulator is characterized in that comprising claim 1,2,4 described illuminators.
6. a spatial light modulator is characterized in that comprising the described illuminator of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03208859 CN2634506Y (en) | 2003-09-02 | 2003-09-02 | Lighting system for optical engine and space light modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03208859 CN2634506Y (en) | 2003-09-02 | 2003-09-02 | Lighting system for optical engine and space light modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2634506Y true CN2634506Y (en) | 2004-08-18 |
Family
ID=34288785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03208859 Expired - Fee Related CN2634506Y (en) | 2003-09-02 | 2003-09-02 | Lighting system for optical engine and space light modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2634506Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520567A (en) * | 2011-11-30 | 2012-06-27 | 哈尔滨固泰电子有限责任公司 | Digital projector |
| CN102540736A (en) * | 2010-12-10 | 2012-07-04 | 上海微电子装备有限公司 | Uniformity compensation device applied to large field-of-view montage illumination |
| CN102654646A (en) * | 2011-03-03 | 2012-09-05 | 矽品精密工业股份有限公司 | Optical engine and projection device |
| CN108224361A (en) * | 2018-01-18 | 2018-06-29 | 云南裕光科技有限公司 | A kind of laser illuminator system and laser lighting method |
-
2003
- 2003-09-02 CN CN 03208859 patent/CN2634506Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540736A (en) * | 2010-12-10 | 2012-07-04 | 上海微电子装备有限公司 | Uniformity compensation device applied to large field-of-view montage illumination |
| CN102540736B (en) * | 2010-12-10 | 2014-11-12 | 上海微电子装备有限公司 | Uniformity compensation device applied to large field-of-view montage illumination |
| CN102654646A (en) * | 2011-03-03 | 2012-09-05 | 矽品精密工业股份有限公司 | Optical engine and projection device |
| CN102654646B (en) * | 2011-03-03 | 2014-07-23 | 矽品精密工业股份有限公司 | Optical engine and projection device |
| CN102520567A (en) * | 2011-11-30 | 2012-06-27 | 哈尔滨固泰电子有限责任公司 | Digital projector |
| CN102520567B (en) * | 2011-11-30 | 2015-09-09 | 哈尔滨固泰电子有限责任公司 | Digital projector |
| CN108224361A (en) * | 2018-01-18 | 2018-06-29 | 云南裕光科技有限公司 | A kind of laser illuminator system and laser lighting method |
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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 |