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Display apparatus

A display device and image signal technology, applied to static indicators, televisions, instruments, etc., can solve the problem of discomfort for observers and achieve the effect of reducing the difference in image quality

Inactive Publication Date: 2012-09-26
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In this way, if the image quality differs depending on the block, it may give discomfort to the viewer.

Method used

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no. 1 approach

[0029] First, an embodiment (first embodiment) of the present invention will be described.

[0030] figure 1 It is a configuration diagram of the television receiver according to the present embodiment. Such as figure 1 As shown, the television receiver 1 has a backlight BL, a liquid crystal panel LP, a receiving unit 11, a definition adjustment unit 12, a color gain adjustment unit 13, a matrix processing unit 14, a contrast adjustment unit 15, and a block classification APL detection unit. 16. A darkening control unit 17, an APL corresponding image quality control unit 18, a user corresponding image quality control unit 19, and the like.

[0031] The backlight BL is arranged on the back side of the liquid crystal panel LP, and illuminates the light of the backlight to the liquid crystal panel LP. Furthermore, the liquid crystal panel LP has a plurality of pixels, and the degree of transmission of the backlight is adjusted for each pixel based on a video signal to be descr...

no. 2 approach

[0062] As described above, the television receiver according to the first embodiment adjusts the intensity of the resolution adjustment and the color gain adjustment for each block. In this regard, if the intensity of sharpness adjustment or color gain adjustment is completely independently adjusted for each block, the difference in image quality near the boundaries between blocks will be very noticeable, which may give a sense of discomfort to the observer.

[0063] Therefore, as another embodiment (second embodiment) of the present invention, an embodiment in which such a difference in image quality can be reduced while making full use of the advantages of the first embodiment will be described below. Among them, the second embodiment is basically the same as the first embodiment except for the order of determining the intensity of the sharpness adjustment and the color gain adjustment. In the following description, the emphasis will be on the description of the content diff...

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PUM

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Abstract

Provided is a display apparatus that performs an adjustment of brightness of a backlight on a per block basis based on a video signal and displays, by using the backlight, an image based on the video signal. The display apparatus includes an adjustment portion that performs an adjustment of a color gain or sharpness with respect to the video signal, and a color gain level or a sharpness level to be achieved by the adjustment for each block is determined in accordance with a degree of the adjustment of brightness performed in the each block.

Description

technical field [0001] The present invention relates to a display device for displaying images, and more particularly to a display device for adjusting image quality. Background technique [0002] Conventionally, a display device having a local dimming function has been proposed. The local dimming is a method of dividing the video display area into a plurality of blocks, and adjusting the brightness of the backlight for each block according to the video signal. By reducing the brightness of the backlight for blocks corresponding to dark portions of the video, power saving and contrast improvement can be achieved. [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2006-216535 [0004] As described above, by the local dimming method, the brightness of the backlight can be adjusted for each block. Here, if attention is paid to image quality, especially for quality items such as color shading or sharpness, the degree of the quality will vary depending on the brightnes...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36H04N5/64H04N5/66
CPCG09G2320/066G09G2360/16H04N5/57G09G3/3426H04N21/44008H04N5/205H04N5/14H04N21/4318G09G2320/0666G09G2320/0646
Inventor 白井一幸水俣直裕
Owner SANYO ELECTRIC CO LTD