CN2483795Y - Colour liquid crystal light valve device - Google Patents
Colour liquid crystal light valve device Download PDFInfo
- Publication number
- CN2483795Y CN2483795Y CN 01246478 CN01246478U CN2483795Y CN 2483795 Y CN2483795 Y CN 2483795Y CN 01246478 CN01246478 CN 01246478 CN 01246478 U CN01246478 U CN 01246478U CN 2483795 Y CN2483795 Y CN 2483795Y
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- liquid crystal
- layer
- light
- color
- micro light
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Abstract
The utility model provides a color liquid crystal light valve device which uses the light for address driving based on the principle that the impedance of the photosensitive layer changes with the change of light intensity. When the three color micro light filtering piece lattice is arranged as the color separating component which matches with polarization splitting prisms, the utility model can be used for situations like projection display and head-mounted display. The utility model has the advantages like high performance, simple structure and low costs.
Description
The utility model relates to photoelectric field, particularly a kind of color liquid crystal light valve device.
In recent years, the technical development of high-definition television (HDTV) is very fast, development has played many novel display techniques, as: Plasma Display (PDP) technology, thin film transistor (TFT) (TFT) display technique, digital micro-mirror show (DMD) technology and silicon base liquid crystal reflective (LCOS) display technique or the like.In addition, utilizing liquid crystal light valve (LCLV) technology, also is one of potential approach that realizes the high resolving power Projection Display.
With the clear light image of panel height projection imaging on the photosensitive layer of liquid crystal light valve, perhaps utilize a cover light scanning apparatus, with a panel height sharp image scanned imagery on the photosensitive layer of liquid crystal light valve, all this image can be write liquid crystal light valve, by the variation of photosensitive layer impedance in the liquid crystal light valve, make the voltage be added on the liquid crystal layer change, thereby make the polarization state of the light (reading light) injected from the other end change, by a polarizer, can read the picture information that writes.But the image that this mode shows is monochromatic, realize colored the demonstration, can adopt a cover optical system, earlier white light is divided into red, green, blue three coloured light, project respectively on three liquid crystal light valve chips, and then with this three-beam combined color image.But shortcomings such as mechanism is complicated, cost is higher, performance is stable inadequately that this color display method has.
The purpose of this utility model is to provide a kind of color liquid crystal light valve device of simple in structure, with low cost, stable performance.
The purpose of this utility model realizes by following technical solution: on the close surface of liquid crystal of the substrate of reading light one side of liquid crystal light valve, be coated with miniature multilayer Medium Optics interference filter array, thereby form the assembling device of liquid crystal light valve and micro light-filter array.These micro light-filters are divided into three classes, see through ruddiness, green glow and blue light respectively, and the light of other wavelength then is reflection.This three classes micro light-filter is Chinese character pin-shaped or pectination is arranged, and periodically alternately is evenly distributed on the substrate of glass.When liquid crystal light valve is worked, owing to write the irradiation of light inlet, the electrical impedance of photosensitive layer is changed, thereby make that added voltage also changes on the liquid crystal layer.And simultaneously, reading light part light is reflected back by micro light-filter earlier, and do not change its polarization direction, another part light then sees through micro light-filter, and after passing on the reflection layer that liquid crystal layer arrives liquid crystal light valve, be reflected back, this polarization of reflected light direction can change with the added voltage of liquid crystal layer is different again.Therefore, adopt a polarization splitting prism, this partial reflection light and the reflected light that does not pass through liquid crystal layer are made a distinction.The reflected light of this part process liquid crystal layer is because through the liquid crystal modulation, have image information, thereby can do colored the demonstration and use directly through an imaging system, the reflected light of that part of not process liquid crystal layer then is reflected back toward light-source system, reflects recycling again through light source reflector.
Description of drawings of the present utility model is as follows:
Fig. 1 is the cross section structure synoptic diagram of color liquid crystal light valve device of the present utility model.
Fig. 2 is the planar alignment distribution schematic diagram of micro light-filter array.(wherein: a is Chinese character pin-shaped distribution; B is that pectination distributes)
Fig. 3 forms the colour projection display synoptic diagram for utilizing the utility model device.
Below in conjunction with accompanying drawing the utility model is elaborated.But do not limit content of the present utility model.
Fig. 1 is the cross section structure synoptic diagram of color liquid crystal light valve device of the present utility model.At first on a transparent substrate 1, plate transparency conducting layer 2 and photosensitive layer 3, (marked change can take place with intensity of illumination in the resistivity of this photosensitive layer, if the thickness of this photosensitive layer is enough thick, also can saves substrate 1, and transparency conducting layer 2 directly is coated on the photosensitive layer material.) and then plate optical confinement layer 4 and reflection layer 5, these optical confinement layers and reflection layer require to have higher resistivity, to guarantee the resolution of image.Therefore, optical confinement layer can adopt high resistant non-transparent material such as CdTe, and reflection layer then can adopt multilayer dielectric reflective coating, or adopts the micro metal catoptron array of net-point shape.On a clear glass substrate 10 that has been coated with nesa coating 9,, make last three color micro light-filtering sheet arrays 8 in addition with the method that photoetching and vacuum coating combine.Micro light-filter has three classes, is the multilayered medium optical thin film and makes, and sees through ruddiness, green glow and blue light respectively, and other spectrum of visibility region then is high reflection.This three classes micro light-filter arranged distribution in the plane be Chinese character pin-shaped or pectination periodically alternately evenly arranged evenly, referring to Fig. 2 (a) and (b); Also this three color micros optical filter directly can be plated on the clear glass substrate 10, with nesa coating 9 be plated in this three color micros optical filter above.This substrate of glass and above-mentioned surface that has the substrate of photosensitive layer that has three color micro light-filtering sheet arrays all is coated with last layer liquid crystal alignment layer 6 (material is polyimide or similar material), after passing through directional process (mechanical friction or other method) then, with these two aspectant lumping together of substrate, the midfeather distance is between 2 microns to 10 microns, the brilliant material 7 of perfusion feed liquor in midfeather, and close periphery, promptly make color liquid crystal light valve assembling device.If between two-layer transparency conducting layer 2 and 9, add an alternating voltage, as images projection or when scanning projects on the photosensitive layer, because the variation of photosensitive layer electrical impedance, make that added voltage also changes on the liquid crystal layer, promptly this images information has been added on the liquid crystal layer.Utilize this principle, can realize the high-resolution color Projection Display.
Fig. 3 promptly is the example schematic that this colour projection shows.The image 20 of one panel height resolution (can be a picture generator or a pointwise image scanning device) through projecting behind the imaging lens 19 on the photosensitive layer of above-mentioned color liquid crystal light valve device 18, changes into the information of voltage that is added on the liquid crystal layer with this high resolution graphics image information.Other read light by light source 12 emission after, reflection through light source reflector 13, pass through collimation lens set 14 again, again by an optical filter 15 elimination ultraviolets and infrared part spectrum, and then convert natural light to linearly polarized light through polarizer 16, impinge perpendicularly on the above-mentioned color liquid crystal light valve device 18 from micro light-filter one end through polarization splitting prism 17 again, the light of its a part of spectrum is reflected back by micro light-filter, (for example shine the light on the ruddiness optical filter, its green glow and blue light partly are reflected back) and do not change its polarization direction, this part light can be reflected once more and be recycled by light source reflector 13, the light of another part spectrum then sees through micro light-filter (for example shining the red light portion of the light on the ruddiness optical filter), and pass liquid crystal layer, reflected back by the reflection layer of above-mentioned color liquid crystal light valve device at last, this partial reflection light is because through liquid crystal layer, its polarization direction can change with added voltage on the liquid crystal layer, this partial reflection light can be deflected 90 ° of ejaculations through behind the polarization splitting prism, be projected onto on the display screen 22 through projection objective 21 again, be COLOUR IMAGE VISUALIZATION OF HE.
In addition, on the gap between each micro light-filter, plate one deck black coating,, can reduce light leak, thereby further improve the image quality of this device, improve image contrast and signal to noise ratio (S/N ratio) as deceiving chromium etc.
The utlity model has following advantage:
1. can realize easily, at low cost the high-definition color displaying scheme of single-chip.
2. can simplify the opticator in the present color projection device greatly, thereby improve effectively
Reliability, reduced volume, and can reduce cost greatly.
3. the utilization ratio of light can be improved effectively, thereby the energy consumption of light source can be reduced greatly, and can be big
A series of spinoffs that big minimizing causes owing to the light source heating.
4. can be at desktop computer, domestic television set, commercial optical projection system and head-mounted display apparatus
Etc. the aspect be used widely.
Claims (8)
1. color liquid crystal light valve device, comprise: substrate, transparency conducting layer, photosensitive layer, optical confinement layer, reflection layer, liquid crystal alignment layer, liquid crystal layer, liquid crystal alignment layer, three color micro light-filtering sheet arrays, transparency conducting layer, glass substrate, it is characterized in that to have a slice substrate of photosensitive layer, optical confinement layer, reflection layer, be coated with the electro-conductive glass substrate of three color micro light-filtering sheet arrays with another sheet, carry out respectively being packaged into one again after the directional process, 2 microns～10 microns interval is left in the centre, can be fed into liquid crystal material.
2. the photosensitive layer described in claim 1, when it is characterized in that a certain zone when this photosensitive layer is by rayed, marked change can take place in this regional electrical impedance.
3. the reflection layer described in claim 1 is characterized in that being made up of multilayer diel, or is made up of the metallic reflection lens array.
4. three color micro light-filtering sheet arrays described in claim 1 is characterized in that becoming Chinese character pin-shaped or pectination distribution, periodically evenly distributed composition by the micro light-filter of three kinds of colors of red, green, blue.
5. three color micro light-filtering sheet arrays described in claim 1 is characterized in that its each micro light-filter forms by the dielectric film alternate combinations of two or more different refractivity, and its rete gross thickness is between 1 micron～5 microns.
6. color liquid crystal light valve device as claimed in claim 1 is characterized in that its miniature three-colour filter array and the both sides of reflection layer apportion liquid crystal layer.
7. color liquid crystal light valve device as claimed in claim 1, the physical dimension of effective coverage that it is characterized in that it is between 12 millimeters～50 millimeters.
8. three color micro light-filtering sheet arrays described in claim 1 is characterized in that the interval region between its each micro light-filter all is coated with black coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01246478 CN2483795Y (en) | 2001-07-12 | 2001-07-12 | Colour liquid crystal light valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01246478 CN2483795Y (en) | 2001-07-12 | 2001-07-12 | Colour liquid crystal light valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2483795Y true CN2483795Y (en) | 2002-03-27 |
Family
ID=33657494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01246478 Expired - Fee Related CN2483795Y (en) | 2001-07-12 | 2001-07-12 | Colour liquid crystal light valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2483795Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006102803A1 (en) * | 2005-03-30 | 2006-10-05 | Peihua Zhou | Method and device for controlling an advertisement display with a light valve |
| CN100444019C (en) * | 2003-09-02 | 2008-12-17 | 精工爱普生株式会社 | Projector |
| CN107703673A (en) * | 2017-11-28 | 2018-02-16 | 武汉华星光电技术有限公司 | Display panel and display device |
-
2001
- 2001-07-12 CN CN 01246478 patent/CN2483795Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100444019C (en) * | 2003-09-02 | 2008-12-17 | 精工爱普生株式会社 | Projector |
| WO2006102803A1 (en) * | 2005-03-30 | 2006-10-05 | Peihua Zhou | Method and device for controlling an advertisement display with a light valve |
| CN107703673A (en) * | 2017-11-28 | 2018-02-16 | 武汉华星光电技术有限公司 | Display panel and display device |
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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 |
Owner name: JINGYING OPTICAL (SHANGHAI) CO., LTD. Free format text: FORMER OWNER: SHAO JIANXIN Effective date: 20050304 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050304 Address after: 200434, 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 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: 20050930 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050930 Address after: The British Virgin Islands of Tortola Rodez Off Shore Company center 957 mailbox Patentee after: Jingying Optics Co., Ltd. Address before: 200434, 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: 20020327 Termination date: 20100712 |