Method for supporting local refreshing of any display area

Abstract

The invention discloses a method for supporting local refreshing of any display area, and the method comprises the steps: dividing a to-be-compressed image into a plurality of original data blocks, and storing the original data blocks in a frame buffer after compression; obtaining the position and the size of a local refreshing area; judging whether the local refreshing area comprises an incompletely refreshed original data block area or not; if yes, receiving image data of the local refresh area, expanding the incompletely refreshed original data block area into a completely refreshed original data block area, compressing a data block corresponding to the incompletely refreshed original data block area, storing the compressed data block in a frame buffer, compressing a data block corresponding to the expanded original data block area, and storing the compressed data block in a local refreshing buffer; and reading the compressed data in the frame buffer and the local refresh buffer, decompressing the compressed data, performing pixel line splicing processing, and displaying the decompressed compressed data in a display system. The display device can support local refreshing of anydisplay area, and the problems of messy codes, blurred screens and the like in the image display process are effectively avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for supporting partial refreshing of any display area. Background technique [0002] The display system includes a display panel and a display driving unit that drives the display panel to display images. In the current display system, many display drive units are integrated with a frame buffer for storing the entire frame of the image to be displayed. When displaying an image, the display drive unit compresses the picture sent by the video source and stores it in the frame buffer. When displaying an image, obtain the compressed data of the image from the frame buffer and display the corresponding image on the display panel after decompression. For example, take a picture with a resolution of 1920×1080 as an example for detailed description: when the system is initialized, according to Display requirements, set the original data block division of the display image to b...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned display system or display data path that needs to compress, store, and decompress the original display image cannot perform partial refresh of any area, that is, when the entire display image data is stored in the frame buffer, if local Refresh, you need to store the new display data in the local refresh area into the storage space of the frame buffer corresponding to this area, overwrite the original display data in this area, and display data stored in other storage spaces in the frame buffer. The data constitutes a new frame of display picture data. If the original data is first compressed by a compression algorithm and then stored in the frame buffer, the partially refreshed display data also needs to be compressed by the compression algorithm and stored in the corresponding position of the frame buffer.

If the partial refresh area contains incompletely refreshed data block areas, the compressed data corresponding to this part of the display data after compression is smaller than the compressed data obtained by compressing complete data blocks, and the display data corresponding to the partial refresh area In the space, the compressed data of the last frame of picture is stored, and each data block corresponds to the storage space one by one. If the compressed data of the new display data in the incompletely refreshed data block area is stored in the corresponding storage space, the Only part of the compressed data of the previous frame image stored in the space will be covered by the compressed data of the new display data, and the remaining part will continue to be reserved. Only a part of the original compressed data will be included in this storage space, that is, the original The compressed data becomes inaccurate and incomplete. When decompressing, the compressed data cannot be decompressed correctly, and the obtained display data will be inaccurate, or even the difference will be large, and display problems will occur, such as blurred screen, garbled characters, etc.

At the same time, different compression algorithms may be used for the original data and partial refresh data, or different configurations of the same compression algorithm may be used, and the data block area shall be marked and recorded. During the decompression process, the data block area needs to be specially processed. It makes data compression and decompression very complicated, which eventually leads to large area overhead, high cost, and high power consumption of the display driver unit or display data path (such as bridge chips, etc.)

Images