Patent ID: 9571780
Date: 2017-02-14
CPC Classifications: G09G,H04N

Claim:
1. A display device, comprising: a source; and a sink operatively connected with the source via an embedded display port (eDP) interface to provide signal transmission between the source and the sink and to enable a panel self refresh (PSR) mode for reducing power consumption; a still image detector that is included in the source, and analyzes an input image to detect a still image; a compressor that is included in the source and losslessly compresses data of the still image by using a previously stored compression algorithm; and a PSR controller that is included in the source, determines a size of the losslessly compressed data, compares the size of the losslessly compressed data with a size of a frame buffer of the sink in order to determine whether the data of the still image can be stored in the frame buffer in a losslessly compressed format without loss, and activates the panel self refresh mode and controls transmission of the losslessly compressed image to the sink only when the size of the losslessly compressed data is equal to or less than the size of the frame buffer, wherein the PSR controller generates an address to store the compressed data in the frame buffer, and compares a size of the generated address with a predetermined maximum address size of the frame buffer, to compare the size of the compressed data with the size of the frame buffer, and wherein the source comprises an eDP transmitter configured to: