US 12,260,834 B2
Control device, control method, and display system
Nobutaka Yamagishi, Yokohama (JP)
Assigned to SOCIONEXT INC., Kanagawa (JP)
Filed by SOCIONEXT INC., Kanagawa (JP)
Filed on Sep. 11, 2023, as Appl. No. 18/244,781.
Application 18/244,781 is a division of application No. 17/381,093, filed on Jul. 20, 2021, abandoned.
Application 17/381,093 is a continuation of application No. PCT/JP2019/002468, filed on Jan. 25, 2019.
Prior Publication US 2023/0419917 A1, Dec. 28, 2023
Int. Cl. G09G 3/24 (2006.01); B60K 35/21 (2024.01); B60K 35/22 (2024.01); B60K 35/28 (2024.01); B60K 35/60 (2024.01); G09G 3/34 (2006.01); G09G 5/10 (2006.01)
CPC G09G 3/3426 (2013.01) [B60K 35/60 (2024.01); G09G 5/10 (2013.01); B60K 35/213 (2024.01); B60K 35/22 (2024.01); B60K 35/28 (2024.01); B60K 2360/1523 (2024.01); B60K 2360/167 (2024.01); B60K 2360/349 (2024.01); G09G 2320/0686 (2013.01); G09G 2360/16 (2013.01); G09G 2380/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control device that executes a local dimming process of a display, the control device comprising:
a plurality of counters; and
a processor configured to execute a process including:
identifying a changed area in which an image is changed in a frame to be displayed on the display, the frame being divided into a plurality of blocks in both a horizontal direction and a vertical direction, and also divided into a plurality of first units for processing in the horizontal direction, each of the plurality of first units for processing including corresponding ones of the plurality of blocks which are arranged in the vertical direction,
analyzing, in a case where the changed area is identified, every time the frame is received, a part of the image in the changed area in the received frame, in a corresponding one of the plurality of first units for processing so that a whole of the image in the changed area is analyzed in all of the plurality of first units for processing over multiple frames by time division processing, and
generating control information for controlling the local dimming process for a corresponding area on the display, every time an analysis result with respect to the image in one of the plurality of first units for processing is output,
wherein the plurality of blocks are units for obtaining histograms, the histograms being obtained by allocating the plurality of counters to the corresponding ones of the plurality of blocks which are arranged in the vertical direction and counting a number of pixels of a tonal range in the corresponding ones of the plurality of blocks which are arranged in the vertical direction.