Picture Signal Processing Device, Picture Signal Processing Method, and Picture Display Device

A picture signal processing method comprising:

• detecting a histogram related to luminance of a picture signal for each frame;
• discriminating a luminance component larger than a defined level from a histogram detected for each frame to calculate a luminance change amount for each frame;
• and
• discriminating a period in which the luminance change amount exceeds a threshold, specifying at least the period as a flashing screen, and suppressing display luminance of the picture signal.

A picture display device comprising:

• a histogram detection module configured to detect a histogram related to luminance of a picture signal for each frame;
• a change amount calculation module configured to discriminate a luminance component with a level larger than a defined level from a histogram for each frame, and calculate a luminance change amount for each frame;
• a flashing screen detection module configured to discriminate a period in which the luminance change amount exceeds a threshold, specify at least the period as a flashing screen, and suppress display luminance of the picture signal;
• and
• a display module configured to suppress brightness of a display screen for the period detected as the flashing screen.