US Patent No. 10,192,497

IMAGE DISPLAY DEVICE AND METHOD FOR DIMMING LIGHT SOURCE


Patent No. 10,192,497
Issue Date January 29, 2019
Title Image Display Device And Method For Dimming Light Source
Inventorship Takeshi Morimoto, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 10,192,497

1. An image display device, comprising:a light source;
a display unit that spatially modulates light from said light source on a basis of an input video signal to form an image;
a histogram acquisition unit that acquires, on the basis of said input video signal, a first histogram, in which image data is indicated by frequencies of levels of brightness, and a second histogram that has a number of levels of brightness that differs from a number of levels of brightness of said first histogram; and
a control unit that implements dimming control for adjusting a luminance of said light source on a basis of said first histogram and said second histogram,
wherein a total sum of histogram count values of said first histogram is equal to a total sum of histogram count values of said second histogram.