Method and system for correcting uniformity of projection display color

A technology for uniform color and projection display, applied in static indicators, cathode ray tube indicators, color signal processing circuits, etc., can solve problems such as uneven color of projectors, achieve improved picture quality, accurate data, and improved unevenness distribution effect

Inactive Publication Date: 2005-03-16
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

In a projection display system, since the light beam incident on the optical film is not a parallel light, but a cone-shaped light beam with a certain divergence

Method used

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  • Method and system for correcting uniformity of projection display color
  • Method and system for correcting uniformity of projection display color
  • Method and system for correcting uniformity of projection display color

Examples

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Example Embodiment

[0016] The color uniformity correction method of the projection display is to divide the display screen into n1×n2 correction areas, with (n1+1)×(n2+1) correction points, and the red, green, and blue brightness changes of each correction point Realized by adjusting the value of the register in the (n1+1)×(n2+1) matrix corresponding to the three colors in the circuit: the 4:3 display screen is divided into 32×24 or 16×12 corrections on average Area, there are 33×25 or 17×13 correction points, the red, green, and blue brightness changes of each correction point are adjusted by the value of the register in the 33×25 or 17×13 matrix corresponding to the three colors in the adjustment circuit to fulfill.

[0017] The average division of the display screen into n1×n2 correction areas means that the red, green, and blue correction values ​​of the correction area are determined by linear interpolation of the correction values ​​of the surrounding correction points.

[0018] The register s...

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Abstract

The invention relates to a method and the corresponding system to correct the color evenness of the projector scope. It divides uniformly the display screen into n1xn2 correction areas. Therefore there are (n1+1)x(n2+1) correction points. The red, green and blue brightness of each correction point varies by tuning the register values of the (n1+1)x(n2+1) matrix corresponding to the three colors of the tuning circuit. The correction brightness values are stored in the register, which will be added to the video signals brightness values of the relevant correction points. The results are served as the final video signal output. The brightness ratios of the three primary colors are kept equal by collecting the red, green and blue brightness values of each correction point through CCD and then tuning the corresponding correction brightness values. By this means, the color evenness is corrected.

Description

technical field [0001] The invention relates to a projection display color uniformity correction method and system thereof. Background technique [0002] With the continuous development of microelectronics technology and liquid crystal manufacturing technology and the continuous decline of research and development costs, projection display systems have been more and more applied to the fields of military command agencies, enterprises, businesses, scientific research, education and entertainment venues. As people have higher and higher requirements on the quality of display images, the color uniformity of projection display systems has also attracted much attention. In a projection display system, since the light beam incident on the optical film is not a parallel light, but a cone-shaped light beam with a certain divergence angle, there will be chromatic aberration on both sides after being reflected or transmitted by the optical film, resulting in the color of the projector...

Claims

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Application Information

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IPC IPC(8): G09G5/02H04N9/64H04N9/77
Inventor 陈颖李海峰刘旭
Owner ZHEJIANG UNIV
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