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Color projection display optical engine

A projection display and optical engine technology, applied in the field of optical engines, can solve the problems of low optical efficiency, small pixel size, difficult high-resolution display, etc., and achieve the effects of high resolution, improved brightness, and good color reproduction.

Inactive Publication Date: 2017-08-25
SHANGHAI YUPEI PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this structure, each sub-pixel needs to be controlled separately, it is difficult to make the pixel size small, it is difficult to achieve high-resolution display, and its optical efficiency is also low

Method used

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  • Color projection display optical engine

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Experimental program
Comparison scheme
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Embodiment 1

[0027] The structure of the existing three-chip projection optical engine is as follows: figure 1 As shown, the white light source is divided into three colors of R, G, and B through a dichroic prism, and then irradiated on three LCOSs through a polarizing beam splitter (PBS). The color combination prism mixes the images of the three colors into a full-color picture, which is projected out through the lens system for imaging. This kind of optical engine needs to use multiple display devices, the process is complicated, the cost is high, and it is not easy to miniaturize. At the same time, because the three pieces are displayed as a discrete structure, because of assembly deviation, there are registration problems in the synthesis of red, green and blue reproduced images in space, which is prone to color alignment deviation, such as figure 2 shown.

[0028] The color projection display optical engine disclosed by the present invention is as image 3 As shown, it includes an...

Embodiment 2

[0035] The color projection display optical engine disclosed in this embodiment is as Figure 8 As shown, it includes an illumination unit 100 , a display chip 200 , optical fiber image sensors 301 , 302 , a color combining unit 400 , and an imaging lens 500 .

[0036] As a preferred solution of the present invention, the lighting unit 100 of the optical engine is composed of three independent LED light sources of red 101, green 102, and blue 103, and the three kinds of monochromatic light sources pass through compound parabolic concentrators CPC 104, 105 , 106 collimated to obtain three kinds of monochromatic quasi-parallel light sources, which are vertically irradiated on the display chip 200. The display chip adopts a transmissive liquid crystal display, including three independent display areas, which are the area 201 for modulating red light and the area 201 for green light modulation. For the light modulation area 202 and the blue light modulation area 203, each display ...

Embodiment 3

[0044] The color projection display optical engine disclosed in this embodiment is as Figure 10 As shown, it includes an illumination unit 100 , a display chip 200 , optical fiber image sensors 301 , 302 , a color combining unit 400 , and an imaging lens 500 .

[0045] As a preferred solution of the present invention, the lighting unit 100 of the optical engine is composed of three independent LED light sources of red 101, green 102, and blue 103, and the three kinds of monochromatic light sources pass through compound parabolic concentrators CPC 104, 105 , 106 collimated to obtain three kinds of monochromatic quasi-parallel light sources, which are vertically irradiated on the display chip 200. The display chip adopts a transmissive liquid crystal display, including three independent display areas, which are the area 201 for modulating red light and the area 201 for green light modulation. For the light modulation area 202 and the blue light modulation area 203, each display...

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Abstract

The invention discloses an optical engine which adopts a single display chip and comprises a lighting unit, a display unit, a color combination unit and an optical fiber image transmission device. The color projection display optical engine is characterized in that the display chip is a flat panel display and comprises three independent display regions which respectively display images of three color components of red, green and blue; the lighting unit comprises a red light source, a green light source and a blue light source which are respectively used for providing lighting for the three display regions of the display chip; the color combination unit comprises at least two light splitting devices; and the optical fiber image transmission device is used for transmitting an image of the display chip and enabling each display region to be identical in equivalent object distance to an imaging lens. The optical lens integrates advantages of a single-chip optical engine and a three-chip optical engine, a three-chip system is enabled to be turned into a single-chip system, the system is simplified, and advantages of good color restoration, high optical efficiency and high resolution of the three-chip optical engine are reserved at the same time.

Description

technical field [0001] The invention relates to the technical field of projection display, in particular to an optical engine for color projection display. Background technique [0002] With the development of display technology, projection display technology has been widely used in daily life. In terms of the display mode of the flat panel display, there are mainly LCOS, HTPS, and DLP display modes. Among them, HTPS is a transmissive LCD display technology, LCOS is a reflective LCD display technology, DLP uses DMD (Digital Micro Mirror Device) as a display device, DMD is a micro-mirror array, and each micro-mirror can mirror two The side is tilted about 10-12°, so that two working states of on and off can be formed, and the display of different gray levels can be realized through the integration of time. [0003] The core optical system (optical engine) of the projection display system is mainly divided into a three-chip system and a single-chip system in terms of archite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G03B21/14H04N9/31
CPCG03B21/202G03B21/142G03B21/2026G03B21/2033H04N9/3102H04N9/3141
Inventor 隆弢
Owner SHANGHAI YUPEI PHOTOELECTRIC TECH CO LTD
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