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Method for displaying projection

A technology of projection display and image signal, applied in the field of image processing, can solve problems such as low contrast

Active Publication Date: 2008-10-08
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, projection equipment (such as LCD, DLP, LCoS projector) based on traditional projection light sources (such as UHP: ultra-high pressure mercury lamp, etc.) has the defect of low contrast

Method used

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Embodiment Construction

[0015] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the following takes the projector as an example, and further describes the present invention in conjunction with the accompanying drawings and specific implementation methods Detailed explanation.

[0016] figure 1 A schematic diagram of a projector is shown. As shown in the figure, the projector 100 includes an illumination device 110 , a light modulation device 120 , an imaging device 130 and a screen 140 . When the projector 100 is working normally, the illuminating device 110 generates an illuminating beam, and the illuminating beam enters the light modulation device 120 after being processed. The light modulation device 120 is mainly composed of a light valve device and its driving circuit, and light valve devices such as LCoS (liquid c...

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Abstract

The invention provides a projection display method, which can perform dynamic adjustment to projection display contrast according to brightness of the image signal, comprising steps: receiving a image signal; analyzing brightness of the image signal; computing optimal modified value of brightness and modifying the image signal according to the optimal modified value; computing light source brightness correction value and adjusting brightness of the projection light source according to the light source brightness correction value. The projection display method of the invention adjusts brightness of the projection light source according to color greyscales of the projection displayed image, which also corrects the image in order to ensure that greyscale of the image will not be reduced following the brightness reduction of the light source, thereby lowering power consumption and improving dynamic contrast.

Description

technical field [0001] The present invention relates to a method for processing images, and more particularly to a method for improving image contrast in projection display. Background technique [0002] With the improvement of living standards and the continuous development of video technology, projection video products have attracted more and more attention from the market. At present, projection video products may be used in small mobile business presentations, multimedia conference rooms, classrooms, stadiums, churches, commercial places, and large auditoriums, and some virtual displays are even as large as movie theaters. Need to use. They are either front projection or rear projection. The so-called front projection, simply put, is that the installation position of the projection equipment is on the same side as the audience on the screen, and the light emitted by the projection equipment is projected onto the screen to form an image on the screen, and then the light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/202G09G5/10
Inventor 刘卫东郭大勃
Owner HISENSE VISUAL TECH CO LTD
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