CN1512214A - Projection type colour display device - Google Patents
Projection type colour display device Download PDFInfo
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- CN1512214A CN1512214A CNA021517797A CN02151779A CN1512214A CN 1512214 A CN1512214 A CN 1512214A CN A021517797 A CNA021517797 A CN A021517797A CN 02151779 A CN02151779 A CN 02151779A CN 1512214 A CN1512214 A CN 1512214A
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- colour display
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Abstract
The projection type color display device includes one light source, one digital lens combination, one projecting lens, one projecting space and one projecting screen. The digital lens combination includes successively arranged silicon substrate, CMOS, metal layer, twisting pivot layer and reflecting mirror layer. White light from the light source is reflected in the digital lens combination to form red light, green light and blue light combined randomly and transmitted to the projecting lens before passing through the projecting space and reaching the projecting screen.
Description
[technical field]
The present invention relates to a kind of colour display device, relate in particular to a kind of projection type colour display device.
[background technology]
Along with the development of HDTV (High Definition Tele Vison, high-definition television), colour projection's display technique and device thereof just play a significant role.Colour projection display is to utilize optical system and projector space that the colorful light-emitting image is amplified and be presented at device on the projection screen.
The projection type colour display device is made up of display device, projection optical system, projector space and the projection screen of display color luminescent image usually.Wherein more display device can or be organized red, green, blue monochrome display spare by a chromatic display or three monochrome display spares of red, green, blue or one group of chromatic display and constituted.The projection screen effect provides an optical imagery interface, makes that luminescent image is projected on the projection screen through projection optical system on the display device, forms a Projection Display image.
A kind of prior art projection type colour display device as shown in Figure 1, this projection type colour display device 1 comprises a light source 10, an optical filtering 11, collimation lens 12, a colour annalyzer 13, a non-crystalline silicon tft (Thin Film Transistor, thin film transistor (TFT)) liquid crystal display 14, a catoptron 15, a projecting lens 16, a projector space 17 and a projection screen 18.Wherein, this colour annalyzer 13 comprises three dichronic mirrors 131,132 and 133, the white light that this light source 10 sends collimated lens 12 behind optical filtering 11 are collimated to colour annalyzer 13, and then from the light of three dichronic mirrors 131,132 and three kinds of different colours of 133 outgoing red, green, blues, then, non-crystalline silicon tft liquid crystal display 14 is controlled passing through or not passing through of light, light by non-crystalline silicon tft liquid crystal display 14 mirror 15 that is reflected reflexes to projecting lens 16, at last, the light from projecting lens 16 outgoing arrives projection screen 18 through projector space 17.But, this projection type colour display device 1 complex structure, and must red, green, blue be carried out color separation by colour annalyzer 13, and it is transferred to respectively on the non-crystalline silicon tft liquid crystal display 14 corresponding red, green, blue pixels, this accuracy requirement to optical system is high.
A kind of prior art projection type colour display device can be consulted No. the 6th, 266,105, the United States Patent (USP) of July 24 calendar year 2001 bulletin, and the principal character element of its disclosed projection type colour display device as shown in Figure 2.The principal character element of this projection type colour display device (figure do not show) is a reflected colours rotary drum 2, and it is one cylindric that this reflected colours rotary drum 2 is, and it comprises six look sections 22 and a plurality of blanking bars 24.This six looks section 22 can be pressed the order-reflected red, green, blue of red, green, blue, red, green, blue, and these a plurality of blanking bars 24 are arranged between the six look sections 22.By rotating the color of these reflected colours rotary drum 2 control emergent lights.The function of colour annalyzer 13, non-crystalline silicon tft liquid crystal display 14 and catoptron 15 in these reflected colours rotary drum 2 tools projection type colour display device 1 shown in Figure 1, its structure is comparatively simple, but, the rotation collimation of this reflected colours rotary drum 2 is difficult, and only can show (red, green), (green, indigo plant) and (indigo plant, red) three kinds of color scheme, fail to reach the purpose of full-color demonstration.
[summary of the invention]
For solving the defective that adopts prior art projection type colour display device complex structure, calibration difficulties, the invention provides a kind of simple in structure, easy projection type colour display device of calibration, and the calibration accuracy height of this projection type colour display device.
Projection type colour display device of the present invention comprises a light source, digital micromirror combination, a projecting lens, a projector space and a projection screen.This digital micromirror combination comprises a silicon base, a CMOS (Complementary Metal-Oxide-Semiconductor, complementary metal oxide semiconductor (CMOS)), a metal level, a torsion hinge layer and a mirror layer that is arranged in order.The coloured light that the white light that light source sends is made up at random by the combined reflected one-tenth red, green, blue of digital micromirror also transfers to projecting lens, arrives projection screen through projector space then.
Projection type colour display device of the present invention adopts the digital micromirror combination, simplify the structure of this projection type colour display device, and the coloured light that this digital micromirror combination can become red, green, blue to make up at random the white light reflection of incident, by the coloured light of CMOS and torsion hinge layer control reflection, to reach the purpose of full-color demonstration.In addition, CMOS tool storage memory function, it can write down calibration digital micromirror combined location, thereby realizes accurately calibration automatically fast, makes this projection type colour display device can be in the state of high optical accuracy.
[description of drawings]
Fig. 1 is a kind of index path of prior art projection type colour display device.
Fig. 2 is the stereographic map of the reflected colours rotary drum of another kind of prior art projection type colour display device.
Fig. 3 is the index path of projection type colour display device first embodiment of the present invention.
Fig. 4 is the cut-open view of the digital micromirror combination of projection type colour display device of the present invention.
Fig. 5 is the generation circuit diagram of control signal of bit address electrode of the digital micromirror combination of projection type colour display device of the present invention.
[embodiment]
Seeing also Fig. 3, is first embodiment of projection type colour display device of the present invention.This projection type colour display device 3 comprises a light source 30, digital micromirror combination 32, one projecting lens 34, a projector space 36 and a projection screen 38, the white light that this light source 30 sends is reflected into the coloured light that red, green, blue makes up at random and transfers to projecting lens 34 by digital micromirror combination 32, arrives projection screen 38 then through projector space 36.
Seeing also Fig. 4, is that digital micromirror shown in Figure 3 makes up 32 sectional view.This digital micromirror combination 32 is to adopt MEMS (Micro Electro Mechanical System, MEMS (micro electro mechanical system)) makes, it comprises a silicon base 321, a CMOS 322, a metal level 323, a torsion hinge layer 324 and a mirror layer 325, and this silicon base 321, CMOS 322, metal level 323, torsion hinge layer 324 and mirror layer 325 are arranged in order.This mirror layer 325 is made of a plurality of arrangements of mirrors (figure does not show), and each arrangement of mirrors is corresponding to a pixel, and it is made up of three catoptrons that can reflect red, green, blue respectively.This metal level 323 is set up being connected of CMOS 322 and torsion hinge layer 324, and this torsion hinge layer 324 is provided with the bit address electrode (figure does not show) of mirror layer 325, selects the duty of arbitrary catoptron of mirror layer 325 in order to control.In addition, this torsion hinge layer 324 is to adopt polysilicon to make.
This CMOS 322 stores the calibration relative position of digital micromirror combination 32 and projecting lens 34, projector space 36 and projection screen 38, when these projection type colour display device 3 work, adjustment along with projecting lens 34, projector space 36 and projection screen 38, this digital micromirror combination 32 can accurately be calibrated by CMOS 322 fast automatic realizations, makes this projection type colour display device 3 can be in the state of high optical accuracy.
The control signal of the bit address electrode of this mirror layer 325 can be modulated (Pulse Width Modulator, PWM) method acquisition by pulse bandwidth.Seeing also Fig. 5, is the control signal generator means 4 of this bit address electrode, and it comprises a controlling signal source 41, a saw-toothed wave generator 42, a variable voltage source 43, a comparer 44 and an output terminal 45.This control signal source 41 is connected to this saw-toothed wave generator 42, the sawtooth signal of these saw-toothed wave generator 42 outputs is connected to an input end of this comparer 44, this variable voltage source 43 is connected to another input end of this comparer 44, and the digital signal that this comparer 44 produces is by these output terminal 45 outputs.This controlling signal generation device 4 exportable in one-period (0,0,0), (0,0,1), (0,1,1), (0,1,0), (1,1,1), (1,1,0), (1,0,1) and (1,0,0) 8 kinds of digital signals, can realize (black, black, black), (black, black, red), (black, red, green), (black, green, black), (red, green, indigo plant), (red, indigo plant, black), (green, black, indigo plant) and (indigo plant, black, black) 8 kinds of coloured light make up.
The color superposition principle of light is as follows:
Red+green+blue=white
Red+green=Huang
Red+indigo plant=purple
Indigo plant+green=green grass or young crops
Black or white+red green or blue=red green or blue
Color superposition principle according to light, promptly black, red, yellow, green, white, purple, the blue or green and blue 8 kinds of coloured light of above-mentioned 8 kinds of coloured light combination, that is each pixel of projection type colour display device 3 shown in Figure 3 all can show above-mentioned 8 kinds of colors arbitrarily, thereby realizes the colored purpose that shows.
Projection type colour display device of the present invention is not limited to above-mentioned embodiment and describes.As, this light source can be metal halide lamp; This projection type colour display device can further comprise an optical filtering, and the light that light source sends transfers to the digital micromirror combination behind the light microscopic after filtration again; This projection type colour display device can further comprise collimation lens, and the light that light source sends transfers to digital micromirror combination etc. again behind the collimation lens collimation.
Claims (10)
1. a projection type colour display device comprises a light source, a projecting lens, a projector space and a projection screen, it is characterized in that this projection type colour display device further comprises digital micromirror combination, this digital micromirror combination comprises a silicon base, a CMOS, a metal level, a torsion hinge layer and a mirror layer that is arranged in order, the coloured light that the white light that this light source sends is made up at random by the combined reflected one-tenth red, green, blue of digital micromirror also transfers to projecting lens, arrives projection screen through projector space then.
2. projection type colour display device as claimed in claim 1 is characterized in that the mirror layer of this digital micromirror combination comprises a plurality of arrangements of mirrors.
3. projection type colour display device as claimed in claim 2 is characterized in that this arrangement of mirrors comprises three catoptrons that reflect red, green, blue respectively.
4. projection type colour display device as claimed in claim 1 is characterized in that the torsion hinge layer of this digital micromirror combination is provided with the bit address electrode of mirror layer.
5. projection type colour display device as claimed in claim 4, the control signal that it is characterized in that this bit address electrode are to adopt the pulse bandwidth modulating device to produce.
6. projection type colour display device as claimed in claim 5 is characterized in that this pulse bandwidth modulating device comprises a control signal source, a saw-toothed wave generator, a variable voltage source, a comparer and an output terminal.
7. projection type colour display device as claimed in claim 1 is characterized in that this light source is a metal halide lamp.
8. projection type colour display device as claimed in claim 1 is characterized in that this projection type colour display device further comprises an optical filtering, and the light that light source sends transfers to the digital micromirror combination behind the light microscopic after filtration again.
9. projection type colour display device as claimed in claim 1 is characterized in that this projection type colour display device further comprises collimation lens, and the light that light source sends transfers to the digital micromirror combination again behind the collimation lens collimation.
10. projection type colour display device as claimed in claim 1 is characterized in that this digital micromirror combination is to adopt MEMS to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021517797A CN1512214A (en) | 2002-12-28 | 2002-12-28 | Projection type colour display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021517797A CN1512214A (en) | 2002-12-28 | 2002-12-28 | Projection type colour display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1512214A true CN1512214A (en) | 2004-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021517797A Pending CN1512214A (en) | 2002-12-28 | 2002-12-28 | Projection type colour display device |
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| Country | Link |
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| CN (1) | CN1512214A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630050B (en) * | 2008-07-17 | 2011-03-30 | 鸿富锦精密工业（深圳）有限公司 | Color wheel and digital light processing projector having same |
| CN101459799B (en) * | 2007-12-14 | 2013-02-20 | 三星电子株式会社 | Projection-type display apparatus and display method thereof |
| CN105093774A (en) * | 2015-08-21 | 2015-11-25 | 京东方科技集团股份有限公司 | MEMS micro-mirror, display panel and display device |
-
2002
- 2002-12-28 CN CNA021517797A patent/CN1512214A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459799B (en) * | 2007-12-14 | 2013-02-20 | 三星电子株式会社 | Projection-type display apparatus and display method thereof |
| CN101630050B (en) * | 2008-07-17 | 2011-03-30 | 鸿富锦精密工业（深圳）有限公司 | Color wheel and digital light processing projector having same |
| CN105093774A (en) * | 2015-08-21 | 2015-11-25 | 京东方科技集团股份有限公司 | MEMS micro-mirror, display panel and display device |
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