US 12,327,530 B2
Backlight module and display device
Junhong Lu, Suzhou (CN); Teng Liu, Suzhou (CN); and Jun Yan, Suzhou (CN)
Assigned to SUZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Suzhou (IL)
Appl. No. 17/795,628
Filed by SUZHOU CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Suzhou (CN)
PCT Filed Jul. 26, 2022, PCT No. PCT/CN2022/107764
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2024/016370, PCT Pub. Date Jan. 25, 2024.
Claims priority of application No. 202210839627.0 (CN), filed on Jul. 18, 2022.
Prior Publication US 2024/0185808 A1, Jun. 6, 2024
Int. Cl. G09G 3/34 (2006.01); G09G 3/00 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 3/006 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/064 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A backlight module, comprising:
a plurality of light-emitting units, wherein each of the light-emitting units comprises a positive terminal and a negative terminal;
one or more driving chips, wherein each of the driving chips comprises a plurality of control terminals, a signal acquisition unit, and a plurality of control units connected to the control terminals, wherein each of the control terminals is connected to the negative terminal of the corresponding light-emitting unit, each of the control units is connected to a control signal and is also connected to a ground terminal, each of the control units controls the corresponding light-emitting unit to emit light based on the control signal, each of the control units comprises a feedback node, and the signal acquisition unit is connected to each of the feedback nodes to acquire a feedback voltage of this feedback node; and
an adjustment module connected to at least one of the driving chips, wherein the adjustment module adjusts brightness of each of the light-emitting units according to the corresponding feedback voltage,
wherein in each of the at least one driving chip, the control units are connected to the control terminals in a one-to-one correspondence,
wherein in each of the at least one driving chip, the signal acquisition unit collects the feedback voltage of the feedback node within a preset time period and obtains an average value of the feedback voltage of the feedback node within the preset time period.