US 2009/0021499 A1Published application

Display driving apparatus and method thereof

AssigneeNovatek Microelectronics Corp.

InventorsHsiang-Chih Chen, Jui-Lin Lo, Don-Chen Hsin

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Abstract

A display driving apparatus and a method thereof are provided. The apparatus includes a memory unit, a compression and decompression unit, a data selection unit, and a display accelerating unit. The memory unit is coupled to the compression and decompression unit and stores only a compressed frame to save memory space in the apparatus. The data selection unit determines whether an error is caused to a frame through data compression and decompression. When the error is greater than a predetermined value, the display accelerating unit turns off an overdriving process upon the pixels to avoid image distortion. The data selection unit also determines whether the frames are static or dynamic in order to determine whether to turn on the overdriving process.

Claims23

Dependent claims

A display driving apparatus, comprising:

a memory unit, for storing a previous compressed frame;
a compression and decompression unit, for receiving a current frame and the previous compressed frame, compressing the current frame to obtain a current compressed frame, and decompressing the current compressed frame to obtain a current decompressed frame, and decompressing the previous compressed frame to obtain a previous decompressed frame;
a data selection unit, obtaining a frame state information according to the current decompressed frame and the previous decompressed frame, and determining a compression error according to the current frame and the current decompressed frame, wherein when the compression error is smaller than a predetermined value and the frame state information is dynamic, the data selection unit outputs the previous decompressed frame as a first frame, otherwise the data selection unit outputs the current frame as the first frame;
and
a display accelerating unit, determining an overdrive value according to the first frame and a second frame.

2 more elements

A display driving method, comprising:

receiving a current frame;
reading a previous compressed frame;
compressing the current frame to obtain a current compressed frame;
decompressing the current compressed frame to obtain a current decompressed frame;
decompressing the previous compressed frame to obtain a previous decompressed frame;
comparing the current decompressed frame and the previous decompressed frame to obtain a frame state information, and comparing the current frame and the current decompressed frame to obtain a compression error, wherein when the compression error is smaller than a predetermined value and the frame state information is determined to be dynamic, the previous decompressed frame is selected as a first frame, otherwise the current frame is selected as the first frame;
and
determining an overdrive value according to the first frame and a second frame.

5 more elements

A display driving method, comprising:

receiving a current frame;
reading a previous compressed frame;
compressing the current frame to obtain a current compressed frame;
decompressing the current compressed frame to obtain a current decompressed frame;
decompressing the previous compressed frame to obtain a previous decompressed frame;
determining a compression error according to the current frame and the current decompressed frame, wherein when the compression error is smaller than a predetermined value, the previous decompressed frame is selected as a first frame, otherwise the current frame is selected as the first frame;
and
determining an overdrive value according to the first frame and a second frame.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/056,231Filed 26 Mar 2008
Priority: TW 9612583216 Jul 2007
Published: 22 Jan 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G09G 3/3648
Control of matrices with row and column drivers: using an active matrix
G09G 2310/04
Command of the display device: partial updating of the display screen
G09G 2320/02
Control of display operating conditions: improving the quality of display appearance
G09G 2320/0285
Improving the quality of display appearance: using tables for spatial correction of display data