Patent ID: 7932877

Claim:
A display device comprising: a display portion comprising: a plurality of pixels arranged in matrix, a shift register for outputting a sampling pulse, and a latch circuit for sampling a video signal in accordance with the sampling pulse; a first line buffer circuit for holding the video signal outputted to a row of pixels of the plurality of pixels; a second line buffer circuit for receiving the video signal from the first line buffer circuit, holding the video signal received from the first line buffer circuit, and outputting the held video signal to the display portion; a test circuit for testing the video signal held in the first line buffer circuit; and a controller circuit for outputting a control signal to the shift register, wherein when the video signal is detected to be a specific video signal, the test circuit outputs to the controller circuit a first control signal so that the shift register stops outputting the sampling pulse corresponding to the row of pixels, and the test circuit outputs to the second line buffer circuit a second control signal so as to stop receiving the video signal from the first line buffer circuit.