Image processing circuit, and display panel driver and...

Details Image processing circuit, and display panel driver and... Image processing circuit, and display panel driver and...

Filed on

2011-03-22

Date issued

2011-03-22

Examiner

Ahmed, Samir A (Department: 2624)

Patent Class

Image analysis

SubClass

Image compression or coding

SubSubClass

Lossless compression

Other Related Categories

C345S204000, C345S555000

Type

Reexamination Certificate

Status

active

Patent number

07912304

Description

ABSTRACT:
A display panel driver includes: a compression circuit, when receiving image data of N×M pixels of a target block, generating compressed image data corresponding to the target block by compressing the image data; an image memory storing the compressed image data; a decompression circuit generating decompressed image data by decompressing the compressed image data from the image memory; and a drive circuit driving a display panel in response to the decompressed image data. The compression circuit selects one of a plurality of compression methods based on a correlation between the image data of the N×M pixels, and generates the compressed image data by the selected compression method. The plurality of compression methods includes: a first method calculating a first value corresponding to image data of the N×M pixels and putting the first value in the compressed image data, a second method calculating a second value corresponding to image data of n pixels of the N×M pixels and putting the second value in the compressed image data, and a third method calculating a bit plane reducing data by performing a bit plane reduction process independently on image data of each of the N×M pixels and putting the bit plane reducing data in the compressed image data.

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Japanese Office Action dated Nov. 11, 2009 and partial English translation thereof.
Japanese Office Action dated Feb. 18, 2010, with English translation.
Japanese Office Action dated Jan. 4, 2010, with English translation.

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