CN1300164A - Projecting color display - Google Patents
Projecting color display Download PDFInfo
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- CN1300164A CN1300164A CN 99124565 CN99124565A CN1300164A CN 1300164 A CN1300164 A CN 1300164A CN 99124565 CN99124565 CN 99124565 CN 99124565 A CN99124565 A CN 99124565A CN 1300164 A CN1300164 A CN 1300164A
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Abstract
The colour projected display equipment consists of blue or block display device with implied colour image, projective optical system and projective space and double-colour light-emitting projection screen, the blue colour or black colour display device is respectively comprised of blue colour of black colour light source, LCD and DMD. The double-colour light-emitting projection screen is coated with red and green light-emitting material. When the blue or black image with implied colour image is passed through the projective optical system, and projected on the double-colour light-emitting projection screen, the red and green light-emitting material can be excited to form colour image. Said invented equipment has the advantages of good colour purity, high brightness, simple structure, clear image and low cost.
Description
The invention relates to the improvement of colour projection display.
Along with the development of HDTV, colour projection's Display Technique and device thereof are just being brought into play crucial effect.Colour projection display is to utilize optical system and projector space will be amplified and be presented at device on the projection screen by the colorful light-emitting image of information Control.Colored Display projector device is made up of display device, projection optical system, projector space and the projection screen etc. of display color luminescent image usually.Wherein display device can be only be made of a chromatic display or three monochrome display spares of red, green, blue or one group of chromatic display or array red, green, blue monochrome display spare.Main colour projection's display mode has CRT (projection tube) formula, LCD (LCDs) formula and DMD (Digital Micromirror Device) formula at present.CRT colour projection display mode is divided into single hose and three-tube type, almost adopts three-tube type at present entirely.LCD colour projection display mode is divided into single screen formula and three-screen type, and DMD colour projection display mode is divided into single DMD formula and three DMD formulas.The projection screen effect provides an optical delivery surface, makes that luminescent image is incident upon on the projection screen through projection optical system on the display device, forms the bigger coloured image of picture dimension.
But there is following shortcoming in the colour projection display of existing structure: for the colour projection display of three CRT formulas, three liquid crystal display screen formulas and three DMD formulas, optical system is complicated, the cost height, the converging ratio of red, green, blue three-colour light-emitting image is difficult simultaneously, and picture quality is affected.For single liquid crystal screen formula colour projection display, though system and device is simplified, but need red, green, blue be carried out color separation by dichronic mirror etc., and it correctly is radiated at respectively on the corresponding red, green, blue color pixel of liquid crystal display screen at a certain angle, the requirement of optical system is become strict more.For single DMD formula colour projection display, system and device is also simplified, but need to adopt mechanical means make filter wheel keep constant rotating speed high speed rotating, and brightness significantly reduces, and picture quality is relatively poor.
The objective of the invention is to solve the above-mentioned shortcoming that exists in the existing colour projection display.Take in single screen formula colour projection display of the present invention and the single DMD formula colour projection display: 1. have dual color light emitting projection screen red, green luminescent material to replace non-luminous projection screen in the existing colour projection display with coated, 2. replace the display device of energy display color luminescent image in the existing colour projection display with blueness that is implied with coloured image or cyan display device, can realize this purpose.
Be elaborated below.
LCD colour projection display mode is divided into three-screen type and single screen formula, the three-screen type principle is that the white light from light source is divided into red, green, blue three coloured light by dichronic mirror, shine respectively on each self-corresponding liquid crystal display screen, pixel is respectively through three kinds of primary colour signal modulation of red, green, blue in three liquid crystal display screens, produce the red, green, blue monochrome image, through assembling and synthesizing, project at last and form coloured image on the projection screen.Three-screen type colour projection display complexity, image are assembled difficult.Single screen formula principle is that the white light from light source is divided into red, green, blue three coloured light by dichronic mirror, and it correctly is radiated in the liquid crystal display screen on the corresponding red, green, blue three class pixels with certain angle, after three kinds of primary colour signal modulation of red, green, blue, produce coloured image, project again on the projection screen, form the bigger coloured image of size.Though single screen formula colour projection display is simple, and is more complicated and stricter to the requirement of color separation optical system.
Single screen formula colour projection display of the present invention adopts liquid crystal display screen, blue-light source, projection optical system and a dual color light emitting projection screen etc.Pixel is divided into red, green, blue three classes in liquid crystal display screen, they correspond respectively to three kinds of primary colour signals of red, green, blue, coated has red, green luminescent material on the dual color light emitting projection screen, they send red, green glow respectively under blue-light excited, and correspond respectively to red in the liquid crystal display screen, green two class pixels.Its operation principle is as follows: the blue light illumination that sends when light source is on liquid crystal display screen the time, three class pixels are subjected to the modulation of red, green, blue primary colour signal respectively, generation is implied with the blue image of coloured image, blue image projects on the dual color light emitting projection screen by projection optical system again, the blue light that is subjected to red, green two kinds of signals modulation excites red accordingly, green luminescent material on the projection screen respectively, be subjected to the directly reflection or the transmission of blue light of blue signal modulation, thereby make blue image be converted to coloured image.Owing to optical systems such as not needing dichronic mirror red, green, blue three coloured light are carried out color separation and synthetic, display unit is greatly simplified, and cost significantly descends, and does not have the color registration problem, so color image quality has obtained remarkable improvement.
DMD is a kind of extremely promising new display spare that occurs recently and develop rapidly, and DMD colour projection display mode is divided into three DMD formulas and single DMD formula.Three DMD formula principles are similar to three-screen type, be that it also is divided into red, green, blue three coloured light to the white light from light source by dichronic mirror, shine respectively again on each self-corresponding DMD, micro mirror in three DMD (being pixel) is respectively after the modulation of red, green, blue primary colour signal, produce the red, green, blue monochrome image, through assembling, synthesizing, project at last and form the bigger coloured image of picture dimension on the projection screen again.Three DMD formula structures and three-screen type are similar, and the main distinction is that three liquid crystal display screens are replaced by three DMD.But liquid crystal display screen can be used transmission mode in three-screen type, also available reflection mode, and DMD uses the reflection mode only in three DMD.Three DMD formula shortcomings and three liquid crystal display screen formulas are roughly the same.The white light source that single DMD formula adopts a DMD and is made up of red, green, blue, and between light source and DMD the filter wheel of a high speed rotating of adding.When filter wheel rotated, it was a red, green, blue coloured light with white light conversion successively.When filter wheel forwards red area to, show red image, when forwarding green area to, show green image, when forwarding blue region to, show blue image.Under the enough fast situation of filter wheel rotating speed,, form coloured image because of the human eye vision persistence characteristic.Single DMD formula adopts the field sequence method to carry out colour to show, so brightness significantly reduces, and needs to adopt mechanical means assurance filter wheel with constant rotating speed high speed rotating simultaneously, and picture quality is affected easily.Compare with three DMD formulas, single DMD formula picture quality is relatively poor.
Single DMD formula colour projection display of the present invention adopts DMD, blue-light source, projection optical system and a dual color light emitting projection screen etc.Similar with single screen formula colour projection display of the present invention, micro mirror is divided into red, green, blue three classes in DMD, they are corresponding with three kinds of primary colour signals of red, green, blue respectively, on the dual color light emitting projection screen, be coated with azaleine, green luminescent material, they send red, green glow respectively under blue-light excited, and correspond respectively to red among the DMD, green two lenslike glass.Its operation principle is as follows: the blue light that sends when light source is radiated at DMD when going up, three lenslike glass are subjected to three kinds of primary colour signal modulation of red, green, blue respectively, generation is implied with the blue image of colorful light-emitting image, when it projects on the dual color light emitting projection screen by projection optical system, the blue light that is subjected to red, green two kinds of signals modulation excites red accordingly, green luminescent material on the projection screen respectively, be subjected to the directly reflection or the transmission of blue light of blue signal modulation, thereby the blue image that is implied with coloured image is converted to coloured image.Because do not need red, green, blue coloured light is carried out color separation, synthetic, colour projection display is greatly simplified, the convergence problem does not exist yet, and color image quality has obtained remarkable improvement.
Liquid crystal display screen generally is made up of materials such as polarizer, liquid crystal, and polarizer, liquid crystal all are macromolecular materials.Light source adopts blue-light source, and it is aging to avoid them to produce under action of ultraviolet radiation, increases the life-span.Liquid crystal display screen available light transmission mode, also available light reflects mode, DMD available light reflection mode.In order to increase the liquid crystal display screen aperture opening ratio, before liquid crystal display screen, also microlens array can be set.
In order to improve contrast, improve colour purity, the position of corresponding red, green, blue transmittance or reflection can be provided with the red, green, blue color filter film respectively on the dual color light emitting projection screen.In order to increase green brightness, improve the white balance characteristic, blue-light source can replace with the cyan light source with blue and green emitted spectrum.
Red, the green luminescent material of coated on the dual color light emitting projection screen can be luminous organic material, also can be phosphor.Red phosphor can adopt the zinc sulphide-cadmium sulfide of manganese activated magnesium arsenate, silver activation etc., red luminous organic material can adopt red fluorescence pigment, red fluorescence dyestuff etc., green luminous organic material can adopt green fluorescence pigment, green fluorescence dyestuff etc., and they send stronger red, green glow respectively under blue-light excited.
In a word, colour projection display of the present invention is made up of the monochrome display spare that is implied with coloured image, projection optical system, projector space and dual color light emitting projection screen etc.Monochrome display spare is by blue-light source or have the cyan light source of blueness, green emitted spectrum and liquid crystal display screen or Digital Micromirror Device are formed, coated has red, green luminescent material on the dual color light emitting projection screen, they respectively blue, green glow or blue-light excited under send red, green glow.Red, green luminescent material can be a luminous organic material, also can be phosphor.
Colour projection display optical system of the present invention is simple, only use a monochrome display spare, do not need red, green, blue three coloured light color separations and synthetic, display unit is greatly simplified, cost is low, and also do not have the convergence problem, brightness significantly improves, so color image quality has obtained very big improvement.
Fig. 1, Fig. 2 and Fig. 5 are colour projection display structure charts of the present invention.The 1st, indium iodide lamp or thallium iodide-indium iodide lamp, the 2nd, TFT liquid crystal display screen, 2A are DMD, the 3rd, projecting lens, the 4th, projector space, the 5th, dual color light emitting projection screen, F are optical filterings, and R, G are respectively red, green luminous points, and B-CF is blue little filter coating.
Fig. 3 and Fig. 4 are respectively existing single screen formula colour projection display and three-screen type colour projection display structure chart, the 1st, and metal fontanelle compound lamp, the 3rd, projecting lens, the 4th, projector space, the 5th, projection screen, F are optical filterings.2 is amorphous silicon TFT-liquid crystal display screens in Fig. 3, and M1, M2 and M3 all are dichronic mirrors, and I is an optical collector, and L is a collimating lens, and R is a speculum.2R, 2G, 2B are respectively red, green, blue multi-crystal TFT-liquid crystal display screens in Fig. 4, and M1, M2, M3 and M4 are dichronic mirrors, and R1 and R2 are speculums.Fig. 6 is existing single DMD formula colour projection display structure chart, the 1st, and metal fontanelle compound lamp, the 2nd, DMD, the 3rd, projecting lens, the 4th, projector space, the 5th, projection screen, F are optical filterings, and FW is a filter wheel, and M is a motor.
Specify with example below.
Example 1
Colour projection display is made up of indium iodide lamp 1, TFT liquid crystal display screen 2, projecting lens 3, projector space 4 and dual color light emitting projection screen 5 etc. in Fig. 1.307200 groups of pixels are arranged in liquid crystal display screen, and every group of pixel is made of each pixel of red, green, blue look, and the red, green, blue color pixel is pressed isosceles triangle and arranged, and they are three kinds of primary colour signals of corresponding red, green, blue respectively.Coated has 307200 groups of luminous points on the dual color light emitting projection screen, every group of luminous point is made up of red, green each luminous point, red, green luminous point (R, G) respectively with liquid crystal display screen on red, green pixel is corresponding, it between two groups of luminous points the zone of coated luminescent material not, this zone is corresponding with blue pixel, can allow blue light pass through.When the blue light that sends when the indium iodide lamp is incident upon on the liquid crystal display screen, the red, green, blue color pixel is subjected to three kinds of primary colour signal modulation of red, green, blue on the liquid crystal display screen, generation is implied with the blue image of coloured image, when it projects on the dual color light emitting projection screen by projection optical system, blue light through red, green two kinds of primary colour signals modulation excites red accordingly, green luminous point on the screen respectively, send red, green glow and pass through screen, blue light through the blue modulation signals modulation then directly passes through screen, and the blue image that is implied with coloured image like this is converted to coloured image.
Example 2
1 is thallium iodide-indium iodide lamp in the colour projection display of Fig. 2, the 2nd, the dual color light emitting projection screen, coated has 307200 groups of luminous points on 2, every group of luminous point is made up of red, green each luminous point, red, green luminous point (R, G) respectively with liquid crystal display screen on red, green pixel is corresponding, with the corresponding zone of liquid crystal display screen blueing pixel be blue little filter coating (B-CF), emitting red light point, green emitting point and blue little filter coating are pressed isosceles triangle and are arranged.All the other are with example 1.When thallium iodide-indium iodide lamp send by indigo plant, when the cyan light that green glow mixes is incident upon on the liquid crystal display screen, red on the liquid crystal display screen, green, blue pixel is subjected to red, green, after blue three kinds of primary colour signals modulation, generation is implied with the cyan image of coloured image, when it projects on the dual color light emitting projection screen by projection optical system, through red, the cyan light of green two kinds of primary colour signals modulation excites on the screen red accordingly respectively, green luminous point, send red, green glow and pass through screen, after the cyan light of blue primary color signal modulation is passed through blue little filter coating, become blue light and pass through screen, the blue image that is implied with coloured image like this is converted to coloured image.
Example 3
2A is DMD in Fig. 5, and 307200 groups of micro mirrors are arranged in DMD, and every group of micro mirror is made of each one of the red, green, blue micro mirror of arranging by isosceles triangle, and they are corresponding with the red, green, blue primary colour signal respectively.Each micromirror size is 0.014mm * 0.014mm, and horizontal pitch and normal pitch are 0.015mm between the micro mirror.Coated has 307200 groups of luminous points on the dual color light emitting projection screen, every group of luminous point is made of red, green each luminous point, and they are corresponding with red, green micro mirror among the DMD respectively, is the zone of coated luminescent material not between two groups of luminous points, this zone is corresponding with blue pixel, can allow blue light pass through.All the other are with example 1.The blue light that sends when the indium iodide lamp is incident upon DMD when going up, the last red, green, blue look of DMD micro mirror is subjected to the modulation of three kinds of primary colour signals of red, green, blue, generation is implied with the blue image of coloured image, when it projects on the dual color light emitting projection screen by projection optical system, blue light through red, green two kinds of primary colour signals modulation excites red accordingly, green luminous point on the screen respectively, produce red, green glow, pass through screen, blue light through the blue primary color signal modulation then directly passes through screen, and the blue image that is implied with coloured image like this is converted to coloured image.
Claims (4)
1. new type colorful projection display equipment is characterized in that it is made up of the monochrome display spare that is implied with coloured image, projection optical system, projector space and dual color light emitting projection screen etc.
2. according to the colour projection display of claim 1, it is characterized in that monochrome display spare is made up of blue-light source and liquid crystal display screen or Digital Micromirror Device, coated has red, green luminescent material on the dual color light emitting projection screen, and they send red, green glow respectively under blue-light excited.
3. according to the colour projection display of claim 1, it is characterized in that monochrome display spare is made up of the cyan light source with blue and green emitted spectrum and liquid crystal display screen or Digital Micromirror Device, coated has red, green luminescent material on the dual color light emitting projection screen, they respectively blue, green glow and blue-light excited under send red, green glow.
4. according to the colour projection display of claim 2 to 3, it is characterized in that red on the dual color light emitting projection screen, green luminescent material can be a luminous organic material, also can be phosphor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991245652A CN1178523C (en) | 1999-12-11 | 1999-12-11 | Projecting color display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991245652A CN1178523C (en) | 1999-12-11 | 1999-12-11 | Projecting color display |
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| CN1300164A true CN1300164A (en) | 2001-06-20 |
| CN1178523C CN1178523C (en) | 2004-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB991245652A Expired - Fee Related CN1178523C (en) | 1999-12-11 | 1999-12-11 | Projecting color display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311272C (en) * | 2002-09-14 | 2007-04-18 | 邱新萍 | Projecting color display |
| CN110275377A (en) * | 2018-03-16 | 2019-09-24 | 京东方科技集团股份有限公司 | A kind of projection device and its display methods |
-
1999
- 1999-12-11 CN CNB991245652A patent/CN1178523C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311272C (en) * | 2002-09-14 | 2007-04-18 | 邱新萍 | Projecting color display |
| CN110275377A (en) * | 2018-03-16 | 2019-09-24 | 京东方科技集团股份有限公司 | A kind of projection device and its display methods |
| CN110275377B (en) * | 2018-03-16 | 2021-08-13 | 京东方科技集团股份有限公司 | Projection equipment and display method thereof |
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| Publication number | Publication date |
|---|---|
| CN1178523C (en) | 2004-12-01 |
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