CN2602397Y - Optical engine for single chip projection system - Google Patents
Optical engine for single chip projection system Download PDFInfo
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- CN2602397Y CN2602397Y CN 02217355 CN02217355U CN2602397Y CN 2602397 Y CN2602397 Y CN 2602397Y CN 02217355 CN02217355 CN 02217355 CN 02217355 U CN02217355 U CN 02217355U CN 2602397 Y CN2602397 Y CN 2602397Y
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- light
- polarization
- optical
- polarization splitting
- display chip
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Abstract
The utility model discloses an optical engine of a single chip projection indicating system. The optical elements such as a light source, a light rod, an optical lens group, a polarization transformation parts, a polarization dispersion prism and a projection field lens are fixed on a fixing base, a colored silicon substrate reflection indicating chip is fixed on a surface of the polarization dispersion prism, therefore, the light transmitted from the light source going through the light rod, the optical lens group, polarization transformation parts and the polarization dispersion prism, then is irradiated on the indicating chip, the colored image information on the indicating chips is projected out through the polarization dispersion prism and the projection field lens, which can be used for the varied sites projection indication.
Description
The utility model relates to optical field, particularly a kind of light engine of single-chip projection display system.
In recent years, along with the technical requirement of high-definition television (HDTV) development, development has played many novel display techniques, and silicon base liquid crystal reflective (LCOS) display technique is one of them typical case's representative.And the developing direction of LCOS display technique is the LCOS display system (referring to patented claim 01113471.2) of one chip.Color LCOS (Liquid Crystal on Silicon) display chip in development process, therefore, needs the corresponding one chip LCOS light engine of exploitation at present.
The purpose of this utility model is to provide a kind of one chip LCOS projection display system light engine of space beam split type.
The purpose of this utility model realizes by following technical solution: lighting source, optical wand, optical lens group and pre-the inclined to one side optical elements such as polarization converter device, polarization splitting prism and projection objective that reach that will have ultraviolet and infrared isolation optical filter are fixed on the firm banking successively, again a colored silicon base liquid crystal reflective display chip is fixed on the surface of polarization splitting prism, and make above-mentioned each optical component constitute a coaxial optical system, thereby form light engine of the present utility model.The light that sends from lighting source (being generally ultrahigh pressure mercury lamp) is after ultraviolet and the elimination of infrared isolation the optical filter ultraviolet and Infrared harmful to system, after the line focus of remaining visible light part, enter this optical wand from the central authorities of the input end of an optical wand, owing to the repeatedly reflection on optical wand surface, can play the effect of its brightness of homogenizing.Behind lens (group), shine pre-rising partially and reach on the polarization converter device again, convert this natural light to linearly polarized light by it.After the reflection of this linearly polarized light through one or several polarization splitting prisms, shine on the colored display chip, the effective coverage of irradiation hot spot and this colour display chip matches.Through the modulation of this colour display chip, be partly with the light of image information, its polarization direction half-twist, and after passing polarization splitting prism, project on the display screen by the projection objective amplification.
Description of drawings of the present utility model is as follows:
Fig. 1 is the principle schematic of light engine of the present utility model.
Fig. 2 is a synoptic diagram of recycling reflection ray with optical wand.
Fig. 3 is a kind of embodiment synoptic diagram of light engine of the present utility model.
Below in conjunction with accompanying drawing the utility model is elaborated.But do not limit content of the present utility model.
Accompanying drawing 1 is a light engine principle schematic of the present utility model.Lighting source 1, optical wand 3, the optical lens group 5 that will have ultraviolet and infrared isolation optical filter 2 are fixed on a metal or the plastic firm banking according to the diagram order with pre-the inclined to one side optical elements such as polarization converter device 11, polarization splitting prism 12 and projection objective 14 that reach, with optical cement or mechanical fasteners method be fixed on a surface of polarization splitting prism on by shown position a colored silicon base liquid crystal reflective display chip 13 again, constitute a coaxial optical system, thereby form light engine of the present utility model.It is (or parabolic to have ellipsoid, need add condenser lens in addition) light that sends of the lighting source 1 (being generally ultrahigh pressure mercury lamp) of reflex housing is after ultraviolet and 2 eliminations of infrared isolation the optical filter ultraviolet ray and infrared ray harmful to system, convergence enters optical wand 3, this optical wand can be that solid glass is made, because glass refraction is higher than air refraction, can form total reflection at the optical wand interface.This optical wand also can be hollow glass tube, and its inwall is coated with the highly reflecting films layer.The length of optical wand should make the light of maximum incident angle degree that twice above reflection arranged.More repeatedly reflection is carried out to the bigger light of incident angle in the optical wand interface, and then order of reflection is less to light that incident angle is less, so just can make the Luminance Distribution of light beam be tending towards even.Make through lens or lens (group) 5 again through the light beam of homogenizing and to be mapped to pre-inclined to one side reaching on the polarization converter device 11 from the light of optical wand 3 outgoing with less incident angle.Should pre-rise partially and polarization converter device 11 is to be formed by two or more than two glass prism 6 that is coated with polarization beam splitter 8 and highly reflecting films 9 and 7 gummeds, and post 1/2nd wave plates 10 in the subregion of its exit portal.Highly reflecting films 9 can be the metal highly reflecting films, or multilayered medium highly reflecting films layer, even can be without any rete, but the high reflecting effect that utilizes the total reflection characteristic of glass to reach.When inciding this, a branch of natural light rises in advance partially and on the polarization converter device time, at first be polarized spectro-film 8 and be divided into two-beam, be s direction polarized light and p direction polarized light, s direction polarized light directly is polarized spectro-film 8 and reflects away, p direction polarized light then transmission is crossed polarization beam splitter 8 and is reflected away by highly reflecting films 9, the p direction polarized light that this is reflected away passes through one 1/2nd wave plate 10 again when outgoing, because the birefringent characteristic and the bit phase delay function of 1/2nd wave plates, make this p direction polarized light be converted into s direction polarized light, together with before being polarized the s direction polarized light that spectro-film 8 directly reflects away, form a branch of s directional ray polarized light.This s directional ray light beam is polarized Amici prism 12 subsequently again and reflexes on the colored display chip 13, this colour display chip 13 is that a kind of three look medium color separation filter arrays are aimed at the metallic reflection lens array that has silicon CMOS addressing circuit is packaged together, the middle assembling device (referring to patented claim 01246153.9) that liquid crystal is arranged of irritating.When the s polarizing light irradiation was to this chip, at first by three look medium color separation filter array beam split, each color separation filter of light transmission of corresponding each picture dot color entered liquid crystal layer, and the light of all the other colors is reflected back.The light that enters liquid crystal layer is reflected away by the metallic mirror of this picture dot after the liquid crystal modulation again, because the modulation of liquid crystal, part s polarized light is converted into the p polarized light, thereby can see through polarization splitting prism 12, is projected object lens 14 and throws away the demonstration of mapping picture.And remainder still is the s polarized light, then is polarized Amici prism 12 once more and reflects back.Owing to that part of energy sees through the extinction ratio that polarization splitting prism 12 is projected the light that object lens 14 throws away is the principal element that determines the projected image contrast, so polarization splitting prism 12 selects for use the polarization splitting prism (referring to patented claim 02215330.6) of High Extinction Ratio will help to improve the quality of projected image.
In the above-mentioned projection display system, an illuminating bundle part that shines on the colored display chip 13 is used to do Projection Display, and another part light is then reflected back by colored display chip 13.And for projection display system, the energy that makes full use of light be improve projected image brightness, reduce power consumption, increase the service life one very effective by way of.Therefore, for the light that is reflected back by colored display chip 13, comprise reflect back from color separation filter and reflect back from the picture dot metallic mirror and be not converted into that part of light of p polarized light, also should fully be recycled.The method of recycling as shown in Figure 2, the light that is reflected back can enter optical wand 3 once more through above-mentioned optical system.And being coated with highly reflecting films layer 4 near the zone the focus point of central area on the input end face of optical wand 3, no coating film area is of a size of and is slightly larger than the spot size of assembling input light, is not subjected to the influence of this highly reflecting films layer to guarantee input light.When input light 16 passes after this non-coating film area enters optical wand, after homogenizing is repeatedly reflected in the optical wand interface, shine on the color separation filter array 15, part light 17 sees through this optical filter and enters liquid crystal layer, and another part light 18 then is reflected back toward optical wand, through behind the boundary reflection of optical wand, the highly reflecting films layer 11 that is transfused to end face is again returned, by behind the optical wand boundary reflection, shine once more on the color separation filter array 15 again, thereby reach the purpose of recycling this part light.In addition, do the area of the output terminal of optical wand 3 more greatly, can reduce effectively from the dispersion angle of the light of optical wand 3 outgoing than the area of input end.Insert a slice ultra-thin metal wire gate device (referring to patented claim 01139205.3) as in light path, adding, can further improve the extinction ratio of light beam, thereby further improve the contrast of projected image.For further improving the brightness uniformity of projected image, also can in light path, insert the holographic scattering homogenizing of a slice device, with the brightness of further homogenizing illuminating bundle.
Fig. 3 is the synoptic diagram of an embodiment of light engine of the present utility model.The positional alignment of each optical element as shown in the figure and be fixed on the firm banking, have light that the lighting source 1 of ellipsoid reflex housing sends after ultraviolet and 2 eliminations of infrared isolation the optical filter ultraviolet ray and infrared ray harmful to system, convergence enters first optical wand 20 and makes homogenizing for the first time, light beam through a homogenizing reduces the dispersion angle of light through lens or lens (group) 5 again, and can focus on the input end face that is mapped to second optical wand 3 by high-quality.For the purpose of making the system architecture compactness, in light, insert two catoptrons 21 with turnover light.These catoptrons can be selected only reflect visible light for use, and see through the cold reflector of infrared light, to reduce the harm of thermal effect to system as far as possible.Enter second optical wand 3 and make again the light of outgoing after the homogenizing, converting light near collimation to by another field lens 23 is mapped to pre-rising partially and on the polarization converter device 11 and converts natural light to s directional ray polarized light, pre-reaches polarization converter device 11 partially is to be formed by three glass prism gummeds that are coated with polarization beam splitter 8 and highly reflecting films 9, and posts 1/2nd wave plates 10 in the subregion of its exit portal.This s linearly polarized light beam again after the reflection through two polarization splitting prisms 22 and 12 (the series connection reflection with two polarization splitting prisms can make the extinction ratio of light beam improve greatly, thereby improves the contrast of projected image) shine on the colored display chip 13.Through the modulation of this colour display chip 13, part s direction polarized light is converted into p direction polarized light, is projected object lens 14 projection imagings thereby can see through polarization splitting prism 12.And the s direction polarized light that partly is not converted in addition then is polarized the input end face that Amici prism 12 reflected back and arrived optical wand 3, is reflected recycling by highly reflecting films 4.
For reducing light path as far as possible, pre-in the accompanying drawing 3 rises partially and polarization converter device 11, polarization splitting prism 12 and 22 and several devices such as colored display chip 13 be glued together.
The utlity model has following beneficial effect:
1. a kind of one chip LCOS projection display system light engine is provided, has helped one chip LCOS Projection display system practical.
2. improved the light utilization ratio of light engine effectively, the brightness that can improve projected image, and can increase life-span of light engine, reduce the power consumption of system.
3. the picture quality height of the optical engine system that provides, compact conformation, volume are little, in light weight.The optical engine system that provides with low cost, the debugging easy, help to carry out large-scale batch process.
Claims (9)
1. the light engine of a single-chip projection display system, comprise lighting source, optical wand, lens combination and pre-rising partially and optical components such as polarization converter device, polarization splitting prism, projection objective and colored display chip, and be fixed on the firm banking, it is characterized in that:
A) lighting source, optical wand, lens combination, pre-rising partially and being centered close on the same optical axis of polarization converter device, polarization splitting prism, projection objective and colored display chip;
B) light focusing of launching from lighting source is in the central area of optical wand input end;
C) colored display chip is positioned on the surface of polarization splitting prism, make and bring together through lens combination from the light of optical wand output terminal outgoing, pre-rising reaches rising in advance partially of polarization converter device partially, and shine on this colour display chip after the reflection of polarization splitting prism, and make that the effective coverage of the size of this irradiation hot spot and this colour display chip is suitable;
D) projection objective nestles up the exit end of polarization splitting prism, and its central shaft with through colored display chip modulation back reflection, and pass the light center that polarization splitting prism penetrates and overlap, the spot size of this light is smaller or equal to the effective aperture of this projection objective.
2. light engine as claimed in claim 1 is characterized in that its colored display chip is the monolithic colour silicon base liquid crystal reflective display chip that has the micro optical filter array colour splitting system.
3. the light engine described in claim 1 is characterized in that the subregion of part optical wand input end end face wherein is coated with highly reflecting films.
4. the light engine described in claim 1, the area that it is characterized in that part optical wand output terminal wherein is 1～5 times of input end area.
5. light engine as claimed in claim 1, it is characterized in that adopting two or more than two, it is glued together that wherein part surface is coated with the glass prism of polarization beam splitter or reflectance coating, and the structure of posting 1/2nd wave plates in the subregion of exit facet rises partially and polarization converter device as pre-.
6. light engine as claimed in claim 1 is characterized in that the polarization splitting prism adjacent with colored display chip adopts the polarization splitting prism of High Extinction Ratio, perhaps adopts the tandem compound of several polarization splitting prisms.
7. light engine as claimed in claim 1 is characterized in that adopting the ultra-thin metal wire gate device as the polarizer that further improves extinction ratio.
8. light engine as claimed in claim 1 is characterized in that adopting the homogenizing device of holographic diffuser part as further homogenizing brightness of illumination.
9. light engine as claimed in claim 1 is characterized in that its polarization splitting prism and pre-rising partially and polarization converter device, adopts the glass prism gummed of identical or different refractive index to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217355 CN2602397Y (en) | 2002-05-14 | 2002-05-14 | Optical engine for single chip projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217355 CN2602397Y (en) | 2002-05-14 | 2002-05-14 | Optical engine for single chip projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2602397Y true CN2602397Y (en) | 2004-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02217355 Expired - Fee Related CN2602397Y (en) | 2002-05-14 | 2002-05-14 | Optical engine for single chip projection system |
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| CN (1) | CN2602397Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345058C (en) * | 2005-04-18 | 2007-10-24 | 东华大学 | Mono-chip single-colour wheel stereo projection optical engine |
| CN100432834C (en) * | 2005-02-24 | 2008-11-12 | 亚洲光学股份有限公司 | Projection display optical system and projector with same |
| CN101923272A (en) * | 2009-06-12 | 2010-12-22 | 红蝶科技(深圳)有限公司 | Miniature projection optical engine based on three-color light source |
| CN101995743A (en) * | 2009-08-21 | 2011-03-30 | 红蝶科技(深圳)有限公司 | Optical projection engine with uniform brightness and color |
| CN102004321A (en) * | 2010-08-27 | 2011-04-06 | 浙江金成科技发展有限公司 | Optical structure of LED liquid crystal projector with single polarization converter |
| CN103713424A (en) * | 2013-12-10 | 2014-04-09 | 中山火炬开发区聚冠机械五金加工厂 | Monitor |
| CN106918865A (en) * | 2015-12-28 | 2017-07-04 | 无锡视美乐激光显示科技有限公司 | Guiding device and its projector equipment of application |
| WO2017114408A1 (en) * | 2015-12-31 | 2017-07-06 | 上海微电子装备（集团）股份有限公司 | Polarized light illumination system and polarized light illumination modulation method |
| CN114690524A (en) * | 2022-03-30 | 2022-07-01 | 青岛海信激光显示股份有限公司 | Optical illumination system and laser projection equipment |
-
2002
- 2002-05-14 CN CN 02217355 patent/CN2602397Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432834C (en) * | 2005-02-24 | 2008-11-12 | 亚洲光学股份有限公司 | Projection display optical system and projector with same |
| CN100345058C (en) * | 2005-04-18 | 2007-10-24 | 东华大学 | Mono-chip single-colour wheel stereo projection optical engine |
| CN101923272A (en) * | 2009-06-12 | 2010-12-22 | 红蝶科技(深圳)有限公司 | Miniature projection optical engine based on three-color light source |
| CN101995743A (en) * | 2009-08-21 | 2011-03-30 | 红蝶科技(深圳)有限公司 | Optical projection engine with uniform brightness and color |
| CN102004321A (en) * | 2010-08-27 | 2011-04-06 | 浙江金成科技发展有限公司 | Optical structure of LED liquid crystal projector with single polarization converter |
| CN103713424A (en) * | 2013-12-10 | 2014-04-09 | 中山火炬开发区聚冠机械五金加工厂 | Monitor |
| CN106918865A (en) * | 2015-12-28 | 2017-07-04 | 无锡视美乐激光显示科技有限公司 | Guiding device and its projector equipment of application |
| WO2017114408A1 (en) * | 2015-12-31 | 2017-07-06 | 上海微电子装备（集团）股份有限公司 | Polarized light illumination system and polarized light illumination modulation method |
| CN114690524A (en) * | 2022-03-30 | 2022-07-01 | 青岛海信激光显示股份有限公司 | Optical illumination system and laser projection equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: FAN BIN Effective date: 20050304 Owner name: JINGYING OPTICAL (SHANGHAI) CO., LTD. Free format text: FORMER OWNER: SHAO JIANXIN |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050304 Address after: 200050, room 28, building 369, Jiangsu Road, Changning District, Shanghai, Patentee after: Crystal optics (Shanghai) Co., Ltd. Address before: 200434 Shanghai City Rende Road 100 Lane No. 18 Room 601 Co-patentee before: Fan Bin Patentee before: Shao Jianxin |
|
| ASS | Succession or assignment of patent right |
Owner name: JINGYING OPTICAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JINGYING OPTICAL (SHANGHAI) CO., LTD. Effective date: 20051028 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20051028 Address after: Hongkong Tongluowan Paterson Henglong Center 22 Patentee after: Jingying Optics Co., Ltd. Address before: 200050, room 28, building 369, Jiangsu Road, Changning District, Shanghai, Patentee before: Crystal optics (Shanghai) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040204 Termination date: 20100514 |