US 12,170,069 B2
Display system and circuit device having local dimming control of backlight
Tatsuhiro Hasu, Matsumoto (JP); and Yasutoshi Akiba, Chino (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 10, 2023, as Appl. No. 18/349,679.
Claims priority of application No. 2022-111036 (JP), filed on Jul. 11, 2022.
Prior Publication US 2024/0013738 A1, Jan. 11, 2024
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/064 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display system comprising:
a circuit device configured to perform local dimming control on a display device including a display panel and a backlight; and
a first light source driver to an n-th light source driver configured to drive the backlight based on dimming information of the local dimming control, n being an integer of 2 or more, wherein
an i-th light source driver among the first light source driver to the n-th light source driver PWM-drives an i-th light source element group among a first light source element group to an n-th light source element group provided in a target area based on the dimming information for the target area, i being an integer of 1 or more and n or less, and the target area being an area to be driven by the first light source driver to the n-th light source driver among a plurality of areas of the backlight in the local dimming control,
the i-th light source element group is coupled to an i-th column line group among a first column line group to an n-th column line group and to an i-th row line group among a first row line group to an n-th row line group, and
the i-th light source driver drives the i-th light source element group by controlling the i-th column line group and the i-th row line group.