Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Inactive Publication Date: 2009-02-04
HITACHI LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The error diffusion processing circuit may not display images faithfully depending on the display pattern
In particular, when performing low-gradation display, the luminance difference between gray-scales is easily discerned due to the characteristics of the human eye, so the noise of the error diffusion circuit is easily noticeable, and thus becomes a cause of deterioration in display quality.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Error diffusion processing circuit, method and plasma display device
  • Error diffusion processing circuit, method and plasma display device
  • Error diffusion processing circuit, method and plasma display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 is a schematic diagram of a configuration example of a plasma display device according to an embodiment of the present invention. The control circuit 7 has an error diffusion processing circuit 10 and receives pixel data DT of a two-dimensional image. The control unit 7 performs gamma conversion processing or the like based on, for example, 10-bit pixel data DT to generate, for example, 16-bit pixel data. Plasma display panel 3 can display, for example, 8-bit pixel data. The error diffusion processing circuit 10 converts the 16-bit pixel data into 8-bit pixel data through gradation conversion.

[0019] The control circuit 7 controls the X driving circuit 4 , the Y driving circuit 5 and the addressing driving circuit 6 according to the pixel data output by the error diffusion processing circuit 10 . The X drive circuit 4 supplies a predetermined voltage to the plurality of X electrodes X1, X2, . . . Hereinafter, each of the X electrodes X1 , X2 , . The Y dr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/28G09G3/20H01J17/49G09F9/313G09G3/288G09G3/296G09G3/298G09G5/00H04N1/405
CPCG09G3/2066G09G2320/0673G09G3/298G09G2310/0232G09G3/296
Inventor 山本晃田岛正也上田寿男
Owner HITACHI LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com