Display driving apparatus and display driving method thereof

Abstract

A display driving apparatus including a signal transmission interface, a timing control circuit and an image detection circuit is provided. The signal transmission interface is configured to receive video image data and output the video image data. The timing control circuit is configured to receive the video image data and drive a display panel based on the video image data. The image detection circuit determines whether the video image data is a static image and determines whether the display driving apparatus operates in a power-saving mode based on the determination result. Under the power-saving mode, the signal transmission interface masks a part of the video image data, so as not: to output the masked video image data to the timing control circuit. Furthermore, a display driving method adapted for the foregoing display driving apparatus is also provided.

What is claimed is: 
     
         1 . A display driving apparatus, adapted to drive a display panel according to video image data, the display driving apparatus comprising:
 a signal transmission interface, receiving the video image data and outputting the video image data;   a timing control circuit, coupled to the signal transmission interface, receiving the video image data, and driving the display panel based on the video image data; and   an image detection circuit, coupled to the signal transmission interface, receiving the video image data, determining whether the video image data is a static image, and determining whether the display driving apparatus enters a power saving mode based on a determination result,   wherein in the power saving mode, the signal transmission interface masks a part of the video image data according to the determination result, so as not to output the masked video image data to the timing control circuit.   
     
     
         2 . The display driving apparatus as claimed in  claim 1 , wherein the video image data comprises a plurality of batches of frame data, and the signal transmission interface masks a part of the frame data in the video image data in the power saving mode. 
     
     
         3 . The display driving apparatus as claimed in  claim 2 , wherein the signal transmission interface further outputs a vertical synchronous signal to the timing control circuit, and in the power saving mode, the masked frame data is arranged at intervals in the frame data in a fixed timing length in response to the vertical synchronous signal. 
     
     
         4 . The display driving apparatus as claimed in  claim 2 , wherein the video image data further comprises a plurality of start signals, and the start signals are located between the frame data for identifying the frame data. 
     
     
         5 . The display driving apparatus as claimed in  claim 4 , wherein the signal transmission interface comprises a receiver circuit, the receiver circuit receives the video image data, and in the power saving mode, the image detection circuit disables the receiver circuit according to the start signals. 
     
     
         6 . The display driving apparatus as claimed in  claim 2 , further comprising a gate driving circuit for providing a scan signal to drive the display panel, wherein in the power saving mode, the timing control circuit outputs a control signal in response to the masked frame data to disable the gate driving circuit. 
     
     
         7 . The display driving apparatus as claimed in  claim 1 , wherein the video image data comprises a plurality of batches of frame data, and each batch of the frame data comprises a plurality of batches of line data, and the signal transmission interface masks a part of the line data in the frame data in the power saving mode. 
     
     
         8 . The display driving apparatus as claimed in  claim 7 , wherein the signal transmission interface further outputs a horizontal synchronous signal to the timing control circuit, and in the power saving mode, the masked line data is arranged at intervals in each batch of the frame data in a fixed timing length in response to the horizontal synchronous signal. 
     
     
         9 . The display driving apparatus as claimed in  claim 8 , wherein in a plurality of batches of first frame data of the frame data, the masked line data comprises even-numbered line data in the line data, and in a plurality of batches of second frame data of the frame data, the masked line data comprises odd-numbered line data in the line data, wherein the first frame data and the second frame data are sequentially arranged at intervals in timing. 
     
     
         10 . The display driving apparatus as claimed in  claim 7 , wherein the video image data further comprises a plurality of start signals, and the start signals are located between the frame data for identifying the frame data. 
     
     
         11 . The display driving apparatus as claimed in  claim 7 , further comprising a gate driving circuit, wherein the gate driving circuit provides a scan signal to drive the display panel during a period that the part of line data is masked in the power saving mode. 
     
     
         12 . A display driving method, for driving a display panel according to video image data, and the display driving method comprising:
 receiving the video image data;   determining whether the video image data is a static image;   determining whether the display driving apparatus enters a power saving mode based on a determination result;   masking a part of the video image data according to the determination result in the power saving mode; and   driving the display panel according to the video image data.   
     
     
         13 . The display driving method as claimed in  claim 12 , wherein the video image data comprises a plurality of batches of frame data, and the step of masking a part of the video image data comprises masking a part of the frame data in the video image data. 
     
     
         14 . The display driving method as claimed in  claim 13 , wherein the display panel is driven according to a vertical synchronous signal, and in the power saving mode, the masked frame data is arranged at intervals in the frame data in a fixed timing length in response to the vertical synchronous signal. 
     
     
         15 . The display driving method as claimed in  claim 13 , wherein the video image data further comprises a plurality of start signals, and the start signals are located between the frame data for identifying the frame data. 
     
     
         16 . The display driving method as claimed in  claim 15 , wherein a receiver circuit is used to receive the video image data, and the display driving method further comprises:
 disabling the receiver circuit according to the start signal in the power saving mode.   
     
     
         17 . The display driving method as claimed in  claim 13 , further comprising:
 providing a scan signal by a gate driving circuit, so as to drive the display panel; and   outputting a control signal in response to the masked frame data to disable the gate driving circuit in the power saving mode.   
     
     
         18 . The display driving method as claimed in  claim 12 , wherein the video image data comprises a plurality of batches of frame data, each batch of the frame data comprises a plurality of batches of line data, and the step of masking the part of the video image data comprises masking a part of the line data in the frame data. 
     
     
         19 . The display driving method as claimed in  claim 18 , wherein the display panel is driven according to a horizontal synchronous signal, and in the power saving mode, the masked line data is arranged at intervals in each batch of the frame data in a fixed timing length in response to the horizontal synchronous signal. 
     
     
         20 . The display driving method as claimed in  claim 19 , wherein in a plurality of batches of first frame data of the frame data, the masked line data comprises even-numbered line data in the line data, and in a plurality of batches of second frame data of the frame data, the masked line data comprises odd-numbered line data in the line data, wherein the first frame data and the second frame data are sequentially arranged at intervals in timing. 
     
     
         21 . The display driving method as claimed in  claim 18 , wherein the video image data further comprises a plurality of start signals, and the start signals are located between the frame data for identifying the frame data. 
     
     
         22 . The display driving method as claimed in  claim 18 , further comprising:
 providing a scan signal to drive the display panel by the gate driving circuit during a period that the part of line data is masked in the power saving mode.