Display device and processing method of image signal thereof

A liquid crystal display comprising:

• an image signal processor configured to receive a previous image signal and a current image signal as two sequential input image signals, and perform a first correction dynamic capacitance compensation (DCC) and a doubling for the current image signal to generate a correction image signal comprising a plurality of doubled frames that are doubled for the current image signal,
• wherein the image signal processor comprises a post processor configured to post-process the correction image signal corresponding to a portion of the plurality of doubled frames to generate a final correction image signal,
• wherein the generating of the final correction image signal comprises outputting the current image signal before the first correction as the final correction image signal, or multiplying the correction image signal corresponding to the portion of the plurality of doubled frames by a weight value and outputting the multiplied result as the final correction image signal,
• wherein the image signal processor comprises a temporal gamma mixing TGM unit configured to double the current image signal or the correction image signal into the plurality of doubled frames according to a TGM mode, and
• wherein the TGM mode applied to the plurality of doubled frames for two sequential input images includes one of an HL-LH mode and an LH-HL mode.

A method of processing an image signal of a liquid crystal display, comprising:

• performing a dynamic capacitance compensation (DCC) and a doubling based on a current image signal to generate a correction image signal comprising a plurality of doubled frames;
• and
• post-processing the correction image signal corresponding to a portion of the plurality of doubled frames to generate a final correction image signal,
• wherein the performing comprise:
• doubling the current image signal according to a temporal gamma mixing TGM mode;
• comparing the current image signal and a previous image signal to generate a flag;
• appending the flag to the previous image signal to generate a modified previous image signal;
• and
• performing the DCC on a result of the doubling and the modified previous image signal.