US 12,223,889 B2
Drive circuit for display device
Kouichi Hashikaki, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 18/567,232
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed May 16, 2022, PCT No. PCT/JP2022/020334
§ 371(c)(1), (2) Date Dec. 5, 2023,
PCT Pub. No. WO2023/007908, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 2021-123297 (JP), filed on Jul. 28, 2021.
Prior Publication US 2024/0274065 A1, Aug. 15, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/34 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/3426 (2013.01); G09G 2300/0857 (2013.01); G09G 2310/0286 (2013.01); G09G 2320/064 (2013.01); G09G 2330/021 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A drive circuit for a display device, comprising:
a comparator that starts comparison between a count number of pulses in a clock signal input and comparison data input in synchronization with a start signal, the comparator including: a shift register that is configured by a plurality of flip-flops in which the clock signal is input to a clock terminal and that is connected in cascade and shifts the start signal; and a selection unit that selects one of outputs of the plurality of flip-flops constituting the shift register according to the comparison data and outputs the start signal shifted as a result of the comparison;
a PWM signal generation unit that generates a PWM signal according to the result of the comparison; and
a drive unit that drives a light emitting element based on the PWM signal generated.