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Method and/or apparatus to improve the visual perception of an image displayed on a screen

A screen and visual technology, applied in image communication, television, static indicators, etc., can solve problems such as not considering the obvious sensitivity of human eyes, not considering the development of scenery content, etc.

Inactive Publication Date: 2008-03-12
SIM2 MULTIMEDIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these methods do not take into account the development of the scene content of the image to be displayed, since they are based on the analysis of individual image frames and provide image adjustments accordingly
[0008] Therefore, when a sudden change in scene content occurs, for example during a scene change from a sunny scene to a poorly lit indoor environment or a night scene, the method according to the prior art does not take into account the significant sensitivity of the human eye to this sudden change

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  • Method and/or apparatus to improve the visual perception of an image displayed on a screen
  • Method and/or apparatus to improve the visual perception of an image displayed on a screen

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Embodiment Construction

[0022] Figure 1 shows a schematic diagram of a structure implementing a method and / or device according to the invention, wherein an image frame H is received by an analysis and adjustment block 1 which analyzes a plurality of image frames H and outputs an image suitable for adjustment The signal P of the power of the rear light (not shown) of the liquid crystal (LCD) panel E，i+1 and a signal C adapted to adjust the contrast of the image displayed on the screen (also not shown) to which the panel is fixed E，i+1 .

[0023] will signal P E，i+1 and C B，i+1 They are respectively sent to the power adjustment circuit 2 and the image contrast control circuit 3 of the rear lighting lamp.

[0024] Figure 2 details the analysis and adjustment block 1, which includes: a block 4 that calculates the spatially averaged brightness of frame H; N A sliding register 5 composed of units 5a...5n, where N is an integer; used to calculate the average brightness y of the current frame i The modu...

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Abstract

The present invention relates to a method and / or apparatus for improving the visual perception of images displayed on a liquid crystal (LCD) panel, said method comprising the step of generating an adjustment of the rear light of said panel according to a target power value (PT) signal (PE, i+1), and the control signal (CE, i+1) of the image contrast is generated according to the adjustment signal (PE, i+1) of the rear light, so that when the effective The contrast of the displayed image is increased / decreased when the adjustment signal (PE,i+1) is decreased / increased.

Description

technical field [0001] The invention relates to a method and / or a device for improving the visual perception of an image display on a screen, in particular on a liquid crystal screen (LCD, liquid crystal display). [0002] In particular, the present invention relates to a method and / or device suitable for improving the visual perception of dark images, ie low brightness images, displayed on an LCD screen. As is known, the LCD screen is illuminated by using a backlight, which is a white light source. Background technique [0003] When an image is displayed on the LCD screen, part of the light generated by the backlight passes through the LCD screen and also passes through the pixels that should be turned off. This phenomenon is called "light leakage" and has the effect of reducing the screen's contrast ratio, which is the ratio between light and dark tones of an image displayed on the screen. [0004] From the prior art, methods and / or devices are known which allow improvin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G2320/0646G09G3/3406G09G2360/16G09G2320/066G02F1/133H04N5/57
Inventor D·托富利M·拉芬
Owner SIM2 MULTIMEDIA
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