Video display apparatus

Abstract

In a display apparatus such as PDP, in order to obtain well-lighted video while suppressing an increase in power consumption, the luminance level of a specific region of a display panel is decreased in accordance with an average luminance level of the entire display panel. However, when a low-luminance region and a high-luminance region are mixed in display video, even the luminance of the low-luminance region is decreased and gray-scale crush is caused in some cases. An average luminance level for each region is detected, and a shading process is controlled for each region based on the detected region-specific average luminance level and the luminance level of input video. With this control, when the luminance level of the input video signal is higher than a predetermined threshold, the shading process is operated, and when the luminance level is lower than the predetermined threshold, the shading process is stopped.

Description

technical field [0001] The present invention relates to an image display device including a display panel, and more particularly, to a self-luminous display panel such as a plasma display panel (plasma display panel, hereinafter abbreviated as PDP), which can obtain a bright image while suppressing an increase in power consumption. A suitable image display device. Background technique [0002] Compared with display devices using CRTs or LCDs, PDP display devices have low total white brightness, and therefore have low contrast ratio (bright room contrast) in a bright living room or the like during the day. In order to improve the display brightness, although the number of discharge pulses for display driving the PDP or the driving voltage thereof can be increased, this will cause a problem of increased power consumption. [0003] As a conventional technique for improving the brightness of images while suppressing power consumption to solve the problem of such a PDP display d...

AI Technical Summary

Problems solved by technology

[0002] Compared with display devices using CRT or LCD, PDP display devices have lower contrast ratio (bright room contrast ratio) in bright daytime living rooms, etc., due to lower full white luminance.

In order to improve the display brightness, although the number of discharge pulses used to display and drive the PDP or its driving voltage can be increased, this will cause the problem of increased power consumption.

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