US 7,403,183 B2 · Image data processing method, and image data processing circuit

Abstract

Consecutive frames of image data are processed for display by, for example, a liquid crystal display. The image data are compressed, delayed, and decompressed to generate primary reconstructed data representing the preceding frame, and the amount of change from the preceding frame to the current frame is determined. Secondary reconstructed data are generated from the current frame image data according to the amount of change. Compensated image data are generated from the current frame image data and the primary and secondary reconstructed data; in this process, either the primary or the secondary reconstructed data may be selected according to the amount of change, or the primary and secondary reconstructed data may be combined according to the amount of change. The amount of memory needed to delay the image data can thereby be reduced without introducing compression artifacts when the amount of change is small.

Claims20

Dependent claims

An image data processing method for determining a voltage applied to a liquid crystal in a liquid crystal display device based on image data representing a plurality of frame images successively displayed on the liquid crystal display device, comprising:

generating primary reconstructed preceding frame image data representing an image of a preceding frame by compressing current frame image data representing an image of a current frame, delaying the compressed image data by one frame interval, and decompressing the delayed image data;
calculating an amount of change between the image of the current frame and the image of the preceding frame;
generating secondary reconstructed preceding frame image data representing the image of the preceding frame, based on the current frame image data and said amount of change;
generating reconstructed preceding frame image data representing the image of the preceding frame, based on an absolute value of said amount of change, the primary reconstructed preceding frame image data, and the secondary reconstructed preceding frame image data;
and
generating compensated image data having compensated values representing the image of the current frame, based on the current frame image data and the reconstructed preceding frame image data.

3 more elements

An image data processing circuit for determining a voltage applied to a liquid crystal in a liquid crystal display device based on image data representing a plurality of frame images successively displayed on the liquid crystal display device, comprising:

a primary preceding frame image data reconstructor for generating primary reconstructed preceding frame image data representing an image of a preceding frame by compressing current frame image data representing an image of a current frame, delaying the compressed image data by one frame interval, and decompressing the delayed image data;
an amount-of-change calculation circuit for calculating an amount of change between the image of the current frame and the image of the preceding frame;
a secondary preceding frame image data reconstructor for generating secondary reconstructed preceding frame image data representing an image of the preceding frame, based on the current frame image data and said amount of change;
a reconstructed preceding frame image data generator for generating reconstructed preceding frame image data representing an image of the preceding frame, based on an absolute value of said amount of change, the primary reconstructed preceding frame image data, and the secondary reconstructed preceding frame image data;
and
a compensated image data generator for generating compensated image data having compensated values representing the image of the current frame, based on the current frame image data and the reconstructed preceding frame image data.

3 more elements

Dependencies are inferred from the claim text.

Image data processing method, and image data processing circuit

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Image data processing method, and image data processing circuit

Life of this patent

Abstract

Claims20