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Plasma display device

A plasma and display device technology, applied in static indicators, instruments, etc., can solve problems such as animation blur, and achieve the effect of preventing animation blur

Inactive Publication Date: 2009-06-17
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Plasma display devices use the sub-frame method to display grayscale levels, so animated pseudo-contours or fast-moving animation blurs may occur

Method used

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Examples

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Embodiment Construction

[0026] FIG. 1 is a block diagram showing a configuration example of a plasma display device according to an embodiment of the present invention. The A / D converter 110 converts the input analog image signal A1 into a digital image signal A2, and outputs a clock signal A3 and a parity signal A4. The halftone generation circuit 120 uses error diffusion and dither processing to generate halftones in order to display with a lighting pattern that limits the number of bits of the input image signal A2. For example, the halftone generating circuit 120 performs error diffusion on the decimal part of the input image signal A2 having an integer part and a decimal part, and outputs the image signal composed of the integer part to the sub-frame (SF) conversion circuit 130. The sub-frame conversion circuit 130 converts the image signal output by the halftone generation circuit 120 into the lighting pattern of each sub-frame. For sub-frames, refer to Picture 12 Be explained. The motion detectio...

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PUM

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Abstract

A plasma display device is provided which includes: drive circuits which supply, to display electrodes, progressive scan pulses for performing display on display lines of a plasma display panel based on respective display data, or simultaneous scan pulses for performing display based on the same display data with one even-numbered display line and one odd-numbered display line vertically adjacent to each other of the plasma display panel taken as a set, in each sub-frame of a plurality of weighted sub-frames in one frame; a motion detection circuit which detects a motion of an image based on an image signal; and a sub-frame number decision circuit which decides the number of sub-frames in which the simultaneous scan pulses are supplied in the one frame, according to the motion of the image.

Description

Technical field [0001] The present invention relates to a plasma display device. Background technique [0002] Since the plasma display device uses the sub-frame method to display the gray scale, the animation may appear to be similar to the outline or the animation blur of the fast motion. [0003] Patent Document 1 below describes a display device having the following characteristics. In a display device that controls lighting of pixels and light emission brightness based on input signals, the resolution is limited according to the setting, and the time for controlling the lighting of the pixels is shortened. [0004] FIG. 15 is a diagram showing a display method of the display device of Japanese Patent No. 2000-347616. One frame has multiple subframes SF1 to SF3. Each subframe has a reset period Tr, an address period Ta, and a sustain period Ts. Two lines adjacent to each other up and down in one frame are set as a group, and the specific subframe SF3 is the same data and scan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/28G09G3/288G09G3/20G09G3/298
CPCG09G2320/103G09G3/293G09G2320/0266G09G3/2022G09G2310/0205G09G2310/021G09G2320/0261G09G3/296
Inventor 竹内正宪
Owner HITACHI LTD