US 11,790,861 B2
Dimming value filtering device, image data processing device and display device for controlling local dimming
Pil Jae Min, Daejeon (KR)
Assigned to SILICON WORKS CO., LTD., Daejeon (KR)
Filed by SILICON WORKS CO., LTD., Daejeon (KR)
Filed on Jun. 10, 2021, as Appl. No. 17/344,598.
Claims priority of application No. 10-2020-0073002 (KR), filed on Jun. 16, 2020.
Prior Publication US 2021/0390917 A1, Dec. 16, 2021
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 2320/0238 (2013.01); G09G 2320/066 (2013.01); G09G 2320/0686 (2013.01); G09G 2360/16 (2013.01); G09G 2380/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A dimming value filtering device for spatially filtering dimming values for adjusting the brightness of blocks of a backlight, the device comprising:
a mask generating circuit configured to generate a first mask and a second mask from among a plurality of masks different from each other;
a mask application circuit configured to apply the first mask to first blocks corresponding to a center of the backlight and apply the second mask to second blocks corresponding to a corner or an edge of the backlight;
a filtering result calculating circuit configured to calculate a filtered dimming value for each of the first blocks according to the first mask based on a first coefficient and the second blocks according to the second mask based on a second coefficient greater than the first coefficient; and
a transmitting and receiving circuit configured to transmit the filtered dimming value.