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A projection display system

A technology of projection display and light modulator, applied in the field of projection display, can solve the problem of low contrast of projection display system, and achieve the effects of improving imaging effect, reducing light loss and reducing design complexity

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

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Problems solved by technology

[0007] In view of the above defects of low contrast of the projection display system in the prior art, the present invention provides a projection display system capable of providing higher contrast, including:

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Embodiment Construction

[0032] In order to solve the problems of low contrast and excessive loss of one color light caused by the "parallel connection" of three light modulators in the prior art projection display system, the present invention changes the relationship of the three light modulators. The main inventive idea of ​​the present invention is to "connect" two light modulators in parallel, and then "serially" connect the pair of "parallel" light modulators with another light modulator. Through the technical solution, the display effect of the projection display system is improved without increasing the cost, and it is an economical and practical technical solution.

[0033] The so-called "parallel connection of light modulators" is to divide a beam of light into two beams of light, so that the two beams of light are respectively modulated by two light modulators and then recombined; the so-called "series connection of light modulators" is to make one beam of light Pass through two light modul...

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Abstract

The invention protects a projection display system, comprising: a light emitting device for emitting first light and second light in time sequence; The light in the second wavelength range emitted by the second optical path, and guide at least part of the second light to emit along the first optical path; the first light modulator is used to modulate the light emitted along the first optical path, and the second optical modulator is used to modulate the light emitted along the first optical path. The light emitted by the two light paths, the light emitted after being modulated by the first light modulator and the photosynthetic light emitted after being modulated by the second light modulator obtain the third light emitted along the third light path; the third light modulator is located between the light emitting device and On the light path between the light splitting devices, the first light and the second light emitted by the light emitting device are modulated, or the third light modulator is located on the third light path, and the third light is modulated. The projection display system improves the imaging effect, reduces light loss, simplifies the combined light path, and reduces design complexity.

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 solution , 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 par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/2006G03B21/206G03B33/08H04N9/3111G03B21/005G03B21/26G03B33/14G03B21/204G03B21/2053H04N9/3126G03B21/2013G03B21/2073
Inventor 李屹胡飞郭祖强
Owner APPOTRONICS CORP LTD
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