CN2697676Y - Liquid crystal projection system - Google Patents
Liquid crystal projection system Download PDFInfo
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- CN2697676Y CN2697676Y CN 200320107892 CN200320107892U CN2697676Y CN 2697676 Y CN2697676 Y CN 2697676Y CN 200320107892 CN200320107892 CN 200320107892 CN 200320107892 U CN200320107892 U CN 200320107892U CN 2697676 Y CN2697676 Y CN 2697676Y
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- projection
- coloured light
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Abstract
The utility model relates to a liquid crystal projection system, which belongs to the technical field of projection. The utility model comprises an illumination optical system, a colored light separation optical system, a relay optical system, electro-optical modulation devices, projection optical systems and an imaging display system. The liquid crystal projection system has the connection mode that the colored light separation optical system and the relay optical system are arranged behind the illumination optical system, and three electro-optical modulation devices are arranged behind the colored light separation optical system and the relay optical system. The red light of first colored light, the green light of second colored light, and the blue light of third colored light which are outputted by are respectively sent into the three electro-optical modulation devices. Three projection optical systems are arranged behind the three electro-optical modulation devices, and the imaging display system is arranged behind the three projection optical systems. The utility model solves the deficiency of background technology. A color-mixing prism, two reflecting mirrors and two half-wave sheets are concelled by the utility model through that the three projection optical systems are arranged. The liquid crystal projection system avoids the problems of the chromatic aberration and the color spots of displayed images, and the liquid crystal projection system improves the effect of the projection.
Description
Technical field
The utility model relates to a kind of projector equipment, particularly a kind of LCD projecting system belongs to the shadow casting technique field.
Background technology
The available liquid crystal optical projection system, the light that luminotron a1 sends in the lamp optical system changes into the directional light that is roughly parallel to light source optical axis through catoptron a2, again through the first lens arra a3, the second lens arra a4, focus in the polarized light generating optics system a5, penetrate the illumination light of polarization direction unanimity, i.e. the S polarized light; This S polarized light enters coloured light split-optics A1, projects dichronic mirror B, C and catoptron F, is separated into red, green, blue three coloured light; The first coloured light red light sees through dichronic mirror B and reflexes to field lens R0 at catoptron F place, arrive 1/2 wave plate Br by field lens R0, carrying out phase differential regulates, the S polarized light is converted into the P polarized light, again through arriving liquid crystal panel Ry by the polaroid R1 of P polarized light, the modulation signal X that is input to liquid crystal panel Ry is modulated to the S polarized light with the P polarized light, and then by the second polaroid R2, this polaroid can only pass through the S polarized light, arrives color-combination prism J; The 3rd coloured light blue light also is so through relay optical system, blue light through 1/2 wave plate Bb to color-combination prism J; The second coloured light green light does not then need through 1/2 wave plate; At last, color-combination prism J synthesizes three coloured light (light modulated) of liquid crystal light valve modulation, generates the synthetic light of performance coloured image.In color-combination prism J, on the interface of four right-angle prisms, roughly be the formation red reflective film and the blue light reflectance coating of X shape.The red reflective film is formed by the dielectric multilayer film of reflection red light, and the blue light reflectance coating is formed by the dielectric multilayer film of reflect blue light, by these red reflective films and the synthetic three kinds of coloured light of blue light reflectance coating, generates the synthetic light of performance coloured image.The synthetic light that is generated by color-combination prism is penetrated by the direction along projecting lens T.The projecting lens projection is presented at coloured image on the screen SC from the synthetic light that color-combination prism penetrates.
Color-combination prism energy reflect red and blue light in the LCD projecting system of above-mentioned prior art by green glow, make three coloured light generate the synthetic light of performance coloured image.But color-combination prism has influenced the transmitance of light in the process of using, make general transmitance about 94%, and its contrast that generates image is low simultaneously, and the aberration problem is arranged, and influence drop shadow effect, and the difficulty of processing of color-combination prism is big, the cost height.Because it adopts same camera lens to three coloured light projections, the aberration problem is arranged simultaneously, and because the plated film difficulty is big, transmitance and contrast are not high.And, owing to use 1/2 wave plate, the rayed that penetrates from lamp optical system is on liquid crystal light valve, make the polaroid heating of liquid crystal light valve, follow this heating, polaroid deforms, distortion along with polaroid, 1/2 wave plate also produces deformation, makes the modulated beam of light generation brightness disproportionation phenomenon that penetrates from liquid crystal light valve, causes shown image the color spot problem to occur.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of LCD projecting system is provided, and makes it can solve above defective, avoids aberration and shown image color spot problem, reaches the LCD projecting system that improves drop shadow effect.
The utility model is achieved through the following technical solutions, and the utility model comprises: lamp optical system, coloured light split-optics, relay optical system, electro-optic modulation arrangement, projection optical system, imaging display system.Its connected mode is: the lamp optical system back is provided with coloured light split-optics and relay optical system, coloured light split-optics and relay optical system back are provided with three electro-optic modulation arrangement, the first coloured light ruddiness, the second coloured light green glow, the 3rd coloured light blue light of coloured light split-optics and relay optical system output, incide three electro-optic modulation arrangement respectively, three electro-optic modulation arrangement back are provided with three projection optical systems, and the picture display system is arranged in three projection optical system back.
The setting that is in line of three projection optical systems, perhaps triangularity setting, also following version can be arranged, promptly increase by three catoptrons in the coloured light split-optics, catoptron is arranged on after the lamp optical system, before three electro-optic modulation arrangement, and these three catoptrons become miter angle with light path, incide three electro-optic modulation arrangement respectively behind light path turnover 90 degree, three projection optical systems are set, the setting that also is in line, perhaps triangularity setting after three electro-optic modulation arrangement.
The illumination parallel beam of the polarization direction unanimity that lamp optical system penetrates is to coloured light split-optics and relay optical system, export the first coloured light ruddiness, the second coloured light green glow, the 3rd coloured light blue light, respectively through three catoptrons that become miter angle with light path, incide three electro-optic modulation arrangement respectively behind turnover 90 degree, be projected to the imaging display system by three projection optical systems then.
Advantage of the present utility model and effect be from the coloured light split-optics separate red, green, blue three color light, see through after the electro-optic modulation arrangement, become three parallel coloured light and be projected to three projection optical systems, thereby color-combination prism and 2 1/2 wave plates have been cancelled, thoroughly solved the influence of color-combination prism to the transmitance of light, and 1/2 wave plate make display image the color spot problem occur, and reduced optical element, reduced cost, simultaneously because three different projection optical systems that adopt three looks to separate, make its processing and plated film reach very high-performance easily, improved the brightness and contrast who generates image to a great extent.The utility model LCD projecting system is suitable for focusing apart from optical projection system, as rear-projection TV etc.
Description of drawings
Fig. 1 the utility model structural representation
Structural representation when Fig. 2 increases by three catoptrons for the utility model
Fig. 3 is that M shown in Figure 2 is to partial view
Fig. 4 is that the N shown in Fig. 2 is to view
Embodiment
As shown in Figure 1, the utility model comprises: lamp optical system 1, coloured light split-optics 2, relay optical system 3, electro-optic modulation arrangement 4, projection optical system 5, imaging display system 6, it is characterized in that, be provided with three projection optical systems 5, lamp optical system 1 back is provided with coloured light split-optics 2 and relay optical system 3, coloured light split-optics 2 and relay optical system 3 back are provided with three electro-optic modulation arrangement 4, the first coloured light ruddiness of coloured light split-optics 2 and relay optical system 3 outputs, the second coloured light green glow, the 3rd coloured light blue light, incide three electro-optic modulation arrangement 4 respectively, three electro-optic modulation arrangement 4 back are provided with 5, three projection optical system 5 back of three projection optical systems and are arranged to picture display system 6.
Arrive shown in Figure 4 as Fig. 2, a kind of version of the present utility model, promptly increase by three catoptrons 7 in coloured light split-optics 2, these three catoptrons become miter angle with light path, incide three electro-optic modulation arrangement 4 respectively behind reflection back light path turnover 90 degree, three projection optical systems 5 are set, the setting that also is in line, perhaps triangularity setting after three electro-optic modulation arrangement 4.
The illumination parallel beam of the polarization direction unanimity that lamp optical system 1 penetrates is to coloured light split-optics 2 and relay optical system 3, export the first coloured light ruddiness, the second coloured light green glow, the 3rd coloured light blue light, respectively through 3 catoptrons that become miter angle with light path, incide three electro-optic modulation arrangement 4 respectively behind reflection back turnover 90 degree, be projected to imaging display system 6 by three projection optical systems 5 then.
The utility model is not limited to the above embodiments or example, in the scope that does not break away from its main idea, can implement in various forms.For example, the various forms of change shapes of lamp optical system, coloured light split-optics, relay optical system, electro-optic modulation arrangement etc.
Claims (3)
1, a kind of LCD projecting system, comprise: lamp optical system (1), coloured light split-optics (2), relay optical system (3), electro-optic modulation arrangement (4), projection optical system (5), imaging display system (6), it is characterized in that, be provided with three projection optical systems (5), lamp optical system (1) back is provided with coloured light split-optics (2) and relay optical system (3), coloured light split-optics (2) and relay optical system (3) back are provided with three electro-optic modulation arrangement (4), the first coloured light ruddiness of coloured light split-optics (2) and relay optical system (3) output, the second coloured light green glow, the 3rd coloured light blue light, incide three electro-optic modulation arrangement (4) respectively, three electro-optic modulation arrangement (4) back is provided with three projection optical systems (5), and picture display system (6) is arranged in three projection optical systems (5) back.
2, LCD projecting system according to claim 1 is characterized in that, three projection optical systems (5) setting that is in line, perhaps triangularity setting.
3, LCD projecting system according to claim 1 and 2, it is characterized in that, perhaps increase by three catoptrons (7) in coloured light split-optics (2), these three catoptrons become miter angle with light path, incide three electro-optic modulation arrangement (4) respectively behind reflection back light path turnover 90 degree, three projection optical systems (5) are set, the setting that also is in line, perhaps triangularity setting after three electro-optic modulation arrangement (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320107892 CN2697676Y (en) | 2003-11-13 | 2003-11-13 | Liquid crystal projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320107892 CN2697676Y (en) | 2003-11-13 | 2003-11-13 | Liquid crystal projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2697676Y true CN2697676Y (en) | 2005-05-04 |
Family
ID=34761954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320107892 Expired - Fee Related CN2697676Y (en) | 2003-11-13 | 2003-11-13 | Liquid crystal projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2697676Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210347A (en) * | 2011-02-25 | 2013-07-17 | 日立民用电子株式会社 | Projection image display device |
-
2003
- 2003-11-13 CN CN 200320107892 patent/CN2697676Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103210347A (en) * | 2011-02-25 | 2013-07-17 | 日立民用电子株式会社 | Projection image display device |
| CN103210347B (en) * | 2011-02-25 | 2015-11-25 | 日立麦克赛尔株式会社 | Projection-type image display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |