Error diffusion processing circuit, method and plasma display device

A technology of error diffusion and processing circuits, which is applied in the direction of identification devices, electrical components, static indicators, etc., can solve the problems of display quality degradation, error diffusion processing circuits cannot faithfully display images, etc., and achieve the effect of improving display quality
CN100458892CInactive Publication Date: 2009-02-04HITACHI LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HITACHI LTD
Publication Date
2009-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

An error diffusion processing circuit is provided which has a separator dividing digital pixel data of an object pixel into high bits and low bits, and making the low bits error data, multiplier circuits multiplying transmission error data of a plurality of adjacent pixels by adjacent pixel weighting coefficients, and outputting weighted transmission error data, a first adder circuit performing addition on the basis of the error data of the object pixel, and the weighted transmission error data of adjacent pixels, and outputting an added value and a carry value, a second adder circuit adding the high bit pixel data of the object pixel and the carry value, and outputting output pixel data, and a correction circuit correcting transmission error data of an adjacent pixel to the error data of the object pixel or data obtained by performing arithmetic processing of it when the transmission error data of the adjacent pixel is 0, and outputting it to the corresponding multiplier circuit.
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Description

technical field

[0001] The invention relates to an error diffusion processing circuit, a method and a plasma display device. Background technique

[0002] Japanese Patent Application Laid-Open No. 2000-227778 describes a plasma display device having an error diffusion processing circuit. The error diffusion processing circuit separates the lower i-bit portion of m-bit pixel data as error data and the upper (m-i) bit portion as display data, and diffuses the error data to adjacent pixels. In addition, Japanese Patent Application Laid-Open No. 2003-271091 describes a display device including an error diffusion processing unit.

[0003] The error diffusion processing circuit sometimes fails to faithfully display an image depending on a display pattern. In particular, when low-gradation display is performed, the difference in luminance between gray-scales is easily discerned due to the characteristics of the human eye, so the noise of the error diffusion circuit is easily noti...

Claims

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