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A projection display system

A technology of projection display and light modulator, which is applied in the field of projection display, can solve the problems of low contrast ratio of projection display system, achieve the effect of improving image quality, improving light utilization rate, and solving high cost and low effect

Active Publication Date: 2020-11-17
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of low contrast of the projection display system in the prior art, the present invention provides a projection display system capable of providing high contrast and high brightness, including:

Method used

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Embodiment 1

[0037] See figure 1 ,like figure 1 Shown is a schematic structural diagram of a projection display system according to Embodiment 1 of the present invention. The projection display system 10 includes a light emitting device 110, a first light modulation system, a second light modulation system, and a light recycling system 130, wherein the first light modulation system includes a first The light modulator 121 , the second light modulation system includes a second light modulator 122 and a third light modulator 123 .

[0038] In this embodiment, the light emitting device 110 emits the first light. The first light modulator 121 of the first light modulation system is located on the optical path of the first light, and is used for modulating the first light, and emitting the first image light and the first non-image light. Subsequently, the first image light is incident on the second light modulation system, and the second light modulation system is located on the optical pat...

Embodiment 2

[0070] See figure 2 ,like figure 2 Shown is a schematic structural diagram of a projection display system according to Embodiment 2 of the present invention. The projection display system 20 includes a light emitting device 210, a first light modulation system, a second light modulation system, and a light recycling system 230, wherein the first light modulation system includes a first The light modulator 221, the second light modulation system includes a second light modulator 222 and a third light modulator 223 connected in parallel in the light path.

[0071] In this embodiment, the light emitting device 110 emits the first light. The first light modulator 221 of the first light modulation system is located on the optical path of the first light, and is used for modulating the first light, and emitting the first image light and the first non-image light. Subsequently, the first image light is incident on the second light modulation system, and the second light modulatio...

Embodiment 3

[0079] See image 3 ,like image 3 Shown is a schematic structural diagram of a projection display system according to Embodiment 3 of the present invention. The projection display system 30 includes a light emitting device 310, a first light modulation system, a second light modulation system, and a light recycling system 330, wherein the first light modulation system includes a first The light modulator 321 , the second light modulation system includes a second light modulator 322 and a third light modulator 323 connected in parallel in the light path, and the projection display system 30 also includes a light splitting element 360 , a light combination device 340 and a light uniform device 350 .

[0080] In this embodiment, the light emitting device 310 emits the first light. The first light modulator 321 of the first light modulation system is located on the optical path of the first light, and is used for modulating the first light, and emitting the first image light and...

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Abstract

A projection display system (10) comprising: a light-emitting apparatus (110) used for emitting first light, wherein the first light comprises red, green, and blue spectra; a first light modulation system located at a light path of the first light, where same is used for modulating the first light and emitting first image light and first non-image light; a second light modulation system located on a light path of the first image light, where same is used for modulating the first image light and emitting second image light and second non-image light, and the second image light enters an emission light path of the projection display system (10) to form an image; and only one of the light modulation system of the first light modulation system and the second light modulation system comprises a light modulator, and the other light modulation system comprises two light modulators, and the two light modulators are connected in parallel in the light path; and a light recycling system (130) used for recycling the first non-image light and / or the second non-image light, and directing same to an incident surface of the first light modulation system or the second light modulation system.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a projection display system. Background technique [0002] In the prior art, a projection device uses a single LCD (Liquid Crystal Display, liquid crystal display) system for image processing, or uses a 3LCD system for image processing. [0003] When a single LCD system is used for image processing, red, green, and blue light are processed by the LCD in turn, and three images of red, green, and blue are obtained, and the color image to be displayed is synthesized at the human eye according to the persistence of vision. Under this technical scheme , the display quality of the image is very low, such as problems such as flickering and low brightness. [0004] When the 3LCD system is used for image processing, at the same time, each LCD only processes one color of light, and then combines the light and emits a color image, which is equivalent to three LCDs being connected in paral...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/28
CPCG03B21/142G03B21/28G03B21/005G03B21/26G03B21/14H04N9/3126
Inventor 郭祖强陈红运李屹
Owner APPOTRONICS CORP LTD
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