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Method for removing image grating on pixel type projected display

A display and pixel technology, applied in instruments, optics, nonlinear optics, etc., can solve problems such as affecting the beauty of images, and achieve the effect of simple system, small influence of light energy, and compact structure

Inactive Publication Date: 2005-09-21
ZHEJIANG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, pixel-based projection displays have a common disadvantage. Since the image screen is composed of pixels, and there is a certain interval between each pixel, black grids will be formed in the displayed screen. The black grid seriously affects the aesthetics of the image
This is the biggest difference and disadvantage between digital projection display technology and analog traditional film projection display.

Method used

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  • Method for removing image grating on pixel type projected display
  • Method for removing image grating on pixel type projected display
  • Method for removing image grating on pixel type projected display

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Embodiment Construction

[0016] The image grid removal method of the pixel type projection display is to use an optical crystal wave plate to make the light emitted from the image pass through the optical crystal to produce o light and e light. The original one pixel becomes two pixels shifted by half a pixel. The black grids between pixels are illuminated by adjacent pixels to realize multi-image small-scale displacement superimposition and remove the grids between pixels.

[0017] The optical crystal wave plate is a thin slice of a single uniaxial crystal or a combination of multiple wafers whose crystal axis directions intersect each other. The single crystal produces one direction of image translation and dislocation superimposition, eliminating the black grid in one direction, and multiple optical crystals are composed of Overlapping makes the image pass through multi-layer crystals to produce multi-directional misalignment lamination, eliminating black grids in different directions.

[0018] The opt...

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Abstract

Superposing the multiple images with displacements in microscales realizes to remove the grids between the pixels. The system includes the screen, the object lens, the color separation, the light mergence or polarizing prism system, the spatial light modulator and the image smooth, which is located in front of the modulator or in the light path before entering the project lens. Gate function convolution lowpass filtering theory is applied. The bipartite component is utilized to remove the black grids in the display of the spatial light modulator of the matrix pixels. The bipartite component can be made from the material with anistropy. The invention technique can be utilized in Liquid Crystal Display, Liquid Crystal on Silicon, Digital Light Processor as well as other array spatial light modulator.

Description

Technical field [0001] The invention relates to a method and system for removing an image grid of a pixel type projection display. Background technique [0002] In modern projection display technology, pixel-based projection display has become the mainstream technology. Such as liquid crystal projection display technology based on thin film transistor liquid crystal display (TFT-LCD), LCOS projection display technology based on liquid crystal display on silicon, and digital light processing projection display technology DLP based on digital micromirror DMD. These large-screen projection technologies are widely used in office, advertising, audio-visual teaching and home entertainment. However, the pixel projection display has a common shortcoming. Because the image picture is composed of one pixel, and there is a certain interval between each pixel, a black grid will be formed in the displayed picture. The black grid seriously affects the beauty of the ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B27/18G02B27/28G02F1/01
Inventor 刘旭刘向东李海峰
Owner ZHEJIANG UNIV
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