Liquid crystal display device and video signal processing method

A liquid crystal display device that displays an input video signal, the liquid crystal display device comprising:

• a first liquid crystal display panel and a second liquid crystal display panel disposed to be laminated;
• a first video signal generator that generates a first video signal for the first liquid crystal display panel by performing stereoscopic vision suppression processing of suppressing stereoscopic vision due to parallax on the video signal;
• and
• a second video signal generator that generates a second video signal for the second liquid crystal display panel using the first video signal,
• wherein the first video signal generator includes:
• a gamma corrector that performs gamma correction on the video signal;
• a stereoscopic vision suppressor that generates the first video signal by performing the stereoscopic vision suppression processing on the video signal output from the gamma corrector;
• and
• a black-spot and bright-spot detector that detects whether the video signal indicates the black spot or the bright spot, and when detecting the black spot, controls the stereoscopic vision suppressor to perform the stereoscopic vision suppression processing with intensity higher than that in a case where the bright spot is detected,
• wherein
• the stereoscopic vision suppressor includes a maximum value filter that replaces a gradation value of a pixel indicated by the video signal with a maximum value in the gradation values of the pixel and a plurality of pixels adjacent to the pixel, and
• when detecting the black spot, the black-spot and bright-spot detector controls the maximum value filter to replace the gradation value of a pixel indicated by the video signal with the maximum value while a number of the plurality of adjacent pixels is increased as compared with a case where the bright spot is detected.

A video signal processing method performed by a liquid crystal display device including a first liquid crystal display panel and a second liquid crystal display panel disposed to be laminated, the video signal processing method comprising:

• a first video signal generating step of generating a first video signal for the first liquid crystal display panel by performing stereoscopic vision suppression processing of suppressing stereoscopic vision due to parallax on an input video signal;
• and
• a second video signal generating step of generating a second video signal for the second liquid crystal display panel using the first video signal generated in the first video signal generating step,
• wherein in the first video signal generating step, a suppression processing is performed, the suppression processing that suppresses a fluctuation range of a gradation value indicated by the video signal when the video signal indicates a bright spot that is different than when the video signal indicates a black spot.