CN1131452C - LCD projector - Google Patents
LCD projector Download PDFInfo
- Publication number
- CN1131452C CN1131452C CN 01120137 CN01120137A CN1131452C CN 1131452 C CN1131452 C CN 1131452C CN 01120137 CN01120137 CN 01120137 CN 01120137 A CN01120137 A CN 01120137A CN 1131452 C CN1131452 C CN 1131452C
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- Prior art keywords
- light
- double
- rhombic prism
- engine
- colored
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- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 230000010287 polarization Effects 0.000 claims description 33
- 238000009738 saturating Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 241001062009 Indigofera Species 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 229940097275 indigo Drugs 0.000 claims description 4
- 239000010981 turquoise Substances 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Images
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- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention belongs to the field of optical instruments, which comprises a light source component composed of a lighting source, a collimating mirror and a filter, an optical engine, a liquid crystal modulator on a silicon chip, and a projecting lens. The present invention is characterized in that the optical engine is a three-color merging/split engine made of rhombic prism. The present invention has the advantages of simple structure, easy producing and low price.
Description
Technical field:
The invention belongs to optical instrument field, particularly a kind of simple in structure, easily manufactured, the LCD projector that price is comparatively cheap.
Background technology:
The crystal projection technology has obtained great development, is widely used in computing machine and shows projector, projection TV.This technology has improved human lives's quality, has brought great riches to society.
General liquid crystal projector is by lighting source (providing projector's illumination), collimation (diverging light of lighting source emission is become parallel beam), light filter (infrared and ultraviolet light in the elimination light beam), light engine (becomes the natural polarized light of light source into linearly polarized light, so that with the polarization characteristic coupling of liquid crystal, the light with light source is separated into redgreenblue again, three looks are carried out intensity modulated by liquid crystal light valve respectively, be combined into three coloured light a branch of again), projection lens elements such as (forming image) is formed.
Present light engine has multiple structure, but its function is the same: all be with the light of three colors of RGB separately, three liquid crystal modulators respectively modulate a kind of monochromatic polarization state and intensity, and are synthetic a branch of again.
At present typical light engine (Optical Engine) structure is described below.
(1) collimated light is mapped on the polarization spectroscope, becomes the P polarized light.(2) plating of P polarized light directive Double-color film level crossing, this level crossing aglow (light) reflection green (light) blue (light), second the logical green anti-indigo plant of Double-color film level crossing.These two dichroic mirrors have been finished the task that three coloured light are separated.(3) three coloured light are modulated by liquid crystal modulator respectively.With ruddiness is example.Red P polarized light is mapped to a reflected P polarization and shines on the liquid crystal modulator after on the spectroscope of S polarization.Because alive liquid crystal polarized characteristic makes polarisation of light direction rotation, the polarisation of light direction is by from all or part of S of the being modulated into polarization of signal of computing machine (or from signal sources such as television videos) and be reflected back toward polarization spectroscope.The S polarized component of ruddiness is reflected, and is polarized the light microscopic that closes that spectroscope reflexes to three coloured light.The light microscopic that closes blue simultaneously, that green glow is also finished same three coloured light of same step directive.The light microscopic that closes of this three coloured light promptly is three usually said look X-prisms (Color X-Cube).Three look X-prisms are combined by four right-angle prisms.Their face of joining all is coated with double-colored polarization beam splitter, and for example, the film of the face plating of joining is: the saturating red green P polarization of anti-blue S polarization; And the film of another right angle face plating is: the anti-red green P polarization of saturating blue S polarization, or the like.(4) for the power that makes three coloured light makes full use of, be before they enter three look X-prisms, all place a wave plate on the path of each light and polarization surface is revolved turn 90 degrees.
From as seen above, in liquid crystal projector, light engine be the most complicated in each parts of projector, element at most, a unit bothering most of the process of debuging.Nearly more than 20 of general parts numbers.
Technology contents:
The objective of the invention is to propose a kind of LCD projector for overcoming the weak point of prior art, it is characterized in that this device uses a rhombic prism three looks to close/minute photo engine, it is simple in structure that it is had, easily manufactured, the advantage that price is comparatively cheap.
A kind of LCD projector that the present invention proposes, comprise by the lighting source that projector's illumination is provided, the diverging light of lighting source emission is become the collimating mirror of parallel beam, the light source assembly that the light filter of the infrared and ultraviolet light in the parallel beam of elimination collimating mirror outgoing is formed, to become the light engine of linearly polarized light through the light beam of light filter outgoing, to the liquid crystal modulator of modulating through the light of light engine outgoing on the silicon chip of being arranged on, receive the light after the modulation and form the projection lens of image, it is characterized in that said light engine is that rhombic prism three looks close/minute photo engine.
Said rhombic prism three looks close/and the spectroscope engine can combine by a polarization spectroscope and a rhombic prism that is coated with Double-color film.
Said rhombic prism can be coated with double-colored deielectric-coating on two optical surfaces parallel to each other.The double-colored deielectric-coating anti-red indigo plant that reveals the green of one side, the saturating red anti-indigo plant of the double-colored deielectric-coating of another side.Also can be simultaneously saturating red anti-turquoise, the saturating indigo plant of another side is anti-green.Can also be simultaneously saturating blue anti-red green, another side is saturating red anti-green.
Said three looks close/and the spectroscope engine can be by a polarization spectroscope, and a rhombic prism and two plane mirrors that are coated with Double-color film combine.Double-colored spectro-film is plated on the surface of two plane mirrors relative with rhombic prism.
Said three looks close/and the spectroscope engine can be by a polarization spectroscope, and a rhombic prism and two prisms that are coated with Double-color film combine.Double-colored spectro-film be plated in two prisms with the rhombic prism facing surfaces on.
In six faces of rhombic prism of the present invention four surfaces being arranged is optical surfaces.Four optical surfaces are parallel to each other in twos.Two optical surfaces that are parallel to each other are coated with double-colored deielectric-coating, the anti-red indigo plant that simultaneously reveals the green, the saturating red anti-indigo plant of another side.A logical optical surface of two be parallel to each other one of optical surface and said polarization spectroscopes is glued together in addition.The light beam of vertical above-mentioned gummed by polarization spectroscope enters rhombic prism and incides on the double-colored deielectric-coating.Double-colored deielectric-coating reflect red is blue and allow green glow pass through, and promptly green glow penetrates from rhombic prism.Ruddiness and blue light are mapped to again on another double-colored deielectric-coating, and ruddiness appears blu-ray reflection, and afterwards, blue light also penetrates from the 4th optical surface.Arrive this, finish three look beam split.Close the inverse process of only beam split.Because the reflection of three coloured light all occurs in rhombic prism inside, can be referred to as " rhombic prism internal reflection three look separation/combination light microscopics "
Two collimating optics surfaces of said rhombic prism internal reflection three look separation/combination light microscopics also can be simultaneously saturating red anti-turquoise, and the saturating indigo plant of another side is anti-green.
Liquid crystal projector of the present invention has following characteristics.Compare with existing projector, it is simple many that optical texture of the present invention is wanted, few many of used part.Main cause is general about 20 optical elements of the light engine of existing projector, and the present invention only needs two elements: the rhombic prism of a polarization spectroscope and one two surface plating Double-color film.These characteristics of the present invention will reduce the cost of projector, be a kind of easier projectors that enters family of low cost.
Description of drawings
Fig. 1 is embodiments of the invention one structural representations.
Fig. 2 is embodiments of the invention two structural representations.
Fig. 3 is embodiments of the invention three structural representations.
Embodiment:
The present invention designs three kinds of rhombic prism three looks and closes/embodiment of minute photo engine projector, as Figure 1-3, be respectively described below:
The general structure of embodiment one illustrates structure of the present invention and principle of work in conjunction with Fig. 1 as shown in Figure 1.
Present embodiment is by light source assembly 100, light engine 200, liquid crystal light valve 5,6,7, and projection lens 300 and screen 400 are formed.
The structure of embodiment two as shown in Figure 2, the light engine 200 of present embodiment is made of polarization spectroscope 3, rhombic prism 4 and two plane mirrors 8 and 9 of being arranged on rhombic prism 4 upper and lower surfaces, it is characterized in that double-colored spectro-film is not plated on rhombic prism two surfaces, but be plated on the surface of two plane mirrors 8 and 9.8 is relative with rhombic prism two optical surfaces with 9 spectro-film.Other is identical with Fig. 1.
The structure of embodiment three as shown in Figure 3, the light engine 200 of present embodiment is made of polarization spectroscope 3, rhombic prism 4 and two prisms 10 and 11 of being arranged on rhombic prism 4 upper and lower surfaces, double-colored spectro-film is plated on two prisms 10 and 11.Spectro-film is relative with rhombic prism two optical surfaces.Other is identical with Fig. 1.
No matter be the described embodiment of Fig. 1, Fig. 2 or Fig. 3, the incident angle 20 of light all must be less than the cirtical angle of total reflection in the rhombic prism.
Claims (7)
1, a kind of LCD projector, comprise by the lighting source that projector's illumination is provided, the diverging light of lighting source emission is become the collimating mirror of parallel beam, the light source assembly that the light filter of the infrared and ultraviolet light in the parallel beam of elimination collimating mirror outgoing is formed, to become the light engine of linearly polarized light through the light beam of light filter outgoing, to the liquid crystal modulator of modulating through the light of light engine outgoing on the silicon chip of being arranged on, receive the light after the modulation and form the projection lens of image, it is characterized in that said light engine is that rhombic prism three looks close/minute photo engine.
2, by the said LCD projector of claim 1, it is characterized in that, rhombic prism three looks close/and the spectroscope engine combines by a polarization spectroscope and a rhombic prism that is coated with Double-color film.
3, by the said LCD projector of claim 2, it is characterized in that said rhombic prism is coated with double-colored deielectric-coating on two optical surfaces parallel to each other; The double-colored deielectric-coating anti-red indigo plant that reveals the green of one side, the saturating red anti-indigo plant of the double-colored deielectric-coating of another side.
4, by the said LCD projector of claim 2, it is characterized in that said rhombic prism is coated with double-colored deielectric-coating on two optical surfaces parallel to each other; One side is saturating red anti-turquoise, and the saturating indigo plant of another side is anti-green.
5, by the said LCD projector of claim 2, it is characterized in that said rhombic prism is coated with double-colored deielectric-coating on two optical surfaces parallel to each other; One side is saturating blue anti-red green, and another side is saturating red anti-green.
6, by the said LCD projector of claim 1, it is characterized in that said three looks close/the spectroscope engine is by a polarization spectroscope, a rhombic prism and two plane mirrors that are coated with Double-color film combine; Double-colored spectro-film is plated on the surface of two plane mirrors relative with rhombic prism.
7, by the said LCD projector of claim 1, it is characterized in that, said three looks close/and the spectroscope engine can be by a polarization spectroscope, and a rhombic prism and two prisms that are coated with Double-color film combine; Double-colored spectro-film be plated in two prisms with the rhombic prism facing surfaces on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01120137 CN1131452C (en) | 2001-07-06 | 2001-07-06 | LCD projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01120137 CN1131452C (en) | 2001-07-06 | 2001-07-06 | LCD projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1330280A CN1330280A (en) | 2002-01-09 |
| CN1131452C true CN1131452C (en) | 2003-12-17 |
Family
ID=4663928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01120137 Expired - Fee Related CN1131452C (en) | 2001-07-06 | 2001-07-06 | LCD projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1131452C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103927953A (en) * | 2014-01-16 | 2014-07-16 | 甘肃大禹数字遥感信息科技有限公司 | Projection display system and method |
| CN108803204B (en) * | 2017-04-28 | 2021-03-12 | 宏碁股份有限公司 | Projector and operating method of projector |
| CN107465853A (en) * | 2017-08-24 | 2017-12-12 | 东南大学 | Field sequence displayer camera system based on motion compensation |
-
2001
- 2001-07-06 CN CN 01120137 patent/CN1131452C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1330280A (en) | 2002-01-09 |
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