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Image display device and image display method

An image display device and image technology, applied to static indicators, instruments, etc., can solve the problem of not being able to accurately display intermediate gray levels

Inactive Publication Date: 2006-10-04
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When viewing the image from any other direction, the middle gray levels are generally not accurately displayed

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

[0126] Embodiments of the present invention will be described below with reference to the drawings.

[0127] In the embodiments, an image display device that displays an image via a direct view type liquid crystal display in response to an input video signal will be taken as an example.

[0128] First, the image display device 10 according to the first embodiment will be explained.

[0129] image 3 A configuration example of the image display device according to the first embodiment of the present invention is shown.

[0130] Such as image 3 As shown, an image display device 10 has a luminance converter 11 that converts a video signal H given as an applied signal voltage into a luminance signal based on a predetermined nonlinear characteristic, an offset generator 12 supplied to an input video signal H, and a For adding and subtracting the first adder circuit 13 and the second adder circuit 14 of the output signals from the luminance converter 11 and the offset table, the...

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Abstract

An image display device and an image display method able to display a middle gray-scale by using a plurality of pixels or fields and, at the same time, improve viewing angle characteristics are provided. When displaying an image via a direct view type liquid crystal display screen, a gray-scales of an input video signal is converted to characteristic values (transmittances) of pixels two-dimensionally arranged with respect to the display image, and the gray-scale is converted so as to include, among a plurality of pixels or fields expressing a middle gray-scale, at least one pixel or field converted to a first characteristic value obtained by adding a positive correction value to the gray-scale of the input video signal, and at least one pixel or field converted to a second characteristic value obtained by adding a negative correction value to the gray-scale of the input video signal.

Description

technical field [0001] The present invention relates to an image display device and an image display method capable of grayscale display according to an input video signal, for example, in a liquid crystal display device. Background technique [0002] When the number of gray levels that can be displayed on a display is small, the boundaries between gray levels appear as a pattern resembling contour lines on a map. This is known as "false contouring" and greatly reduces display performance. [0003] Generally, if each color can be displayed by about 8 bits (256 gray levels), such false contouring becomes a level that does not cause problems in display performance. [0004] However, in a liquid crystal display, a plasma display panel (PDP), an electroluminescent display (ELD), or other display devices, it is relatively difficult to display each color (256 gray levels) in 8 bits. [0005] For example, a liquid crystal display device equipped with a thin film transistor (TFT) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 谷野友哉城地义树矶边敏信饭田牧夫
Owner SONY CORP