Image display device, and image display method

An image display device and a technology for display, applied to static indicators, instruments, etc., can solve the problem of reduced color reproducibility and achieve high color rendition

Inactive Publication Date: 2011-07-13
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the brightness of at least one color is displayed with the required brightness, so the ratio of the brightness of each color that should be displayed originally changes, thereby causing a problem of lowered color reproducibility (hue change).

Method used

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  • Image display device, and image display method
  • Image display device, and image display method
  • Image display device, and image display method

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Embodiment Construction

[0062] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0063]

[0064] figure 1 It is a block diagram showing the configuration of a liquid crystal display device 10 according to an embodiment of the present invention. figure 1 The illustrated liquid crystal display device 10 has a liquid crystal panel 11 , a panel drive circuit 12 , a backlight 13 , a backlight drive circuit 14 , and an area active drive processing unit 15 . The liquid crystal display device 10 divides a screen into a plurality of regions, controls the brightness of the backlight according to input images in the regions, and performs region active driving for driving the liquid crystal panel 11 . Hereinafter, m and n are integers of 2 or more, p and q are integers of 1 or more, and at least one of p and q is an integer of 2 or more.

[0065] The liquid crystal display device 10 is input with an input image 31 including an R image, a G image, and a B im...

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PUM

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Abstract

The present invention provides an image display device and an image display method. In the present invention, display is performed with high color reproducibility by a display device that performs area active drive. A LED output value calculation section (151) calculates, from an input image (31), LED data (33) representing the brightness of the LED corresponding to each area when the LED emits a beam. A display brightness calculation section (152) calculates, from the LED data (33) and a brightness diffusion filter (155), a brightness image (41) including the displaying brightness of each area. A LED data calculation section (154) calculates, from the input image (42) delayed by a frame memory (153) and the brightness image (41), the tentative light transmission of a displaying element of a liquid crystal panel. When the maximum value of each color thereof is greater than one, a value obtained by dividing the tentative light transmission by the maximum value is set as the light transmission; when the maximum value is not greater than one, the tentative light transmission is set as the light transmission. Then, the liquid crystal data (32) representing the light transmission is calculated. Therefore, even if there is a color the brightness of which is not sufficient, the ratio between the colors does not change, leading to an increase in color reproducibility.

Description

technical field [0001] The present invention relates to an image display device and an image display method, and more particularly to an image display device having a function of controlling the brightness of a backlight (backlight dimming function) and an image display method in the device. Background technique [0002] In an image display device having a backlight such as a liquid crystal display device, by controlling the brightness of the backlight according to an input image, power consumption of the backlight can be suppressed and the image quality of a displayed image can be improved. In particular, by dividing the screen into a plurality of areas and controlling the brightness of the backlight corresponding to the area based on the input image in the area, it is possible to further reduce power consumption and improve image quality. Hereinafter, the method of driving the display panel while controlling the luminance of the backlight based on the input image in the ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20G09G3/34
CPCG09G2360/16G09G3/3413G09G3/3426G09G2320/0666G09G2320/0646
Inventor 田中勇司
Owner SHARP KK
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