US 12,170,068 B2
Backlight apparatus and operating method thereof
Junil Park, Suwon-si (KR); Sugyeung Kang, Suwon-si (KR); Yongil Kwon, Suwon-si (KR); Kang Joo Kim, Suwon-si (KR); Alan Kyongho Kim, Suwon-si (KR); Sunkwon Kim, Suwon-si (KR); Yong-Yun Park, Suwon-si (KR); Jung-Pil Lim, Suwon-si (KR); and Hyunwook Lim, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jun. 12, 2023, as Appl. No. 18/208,543.
Claims priority of application No. 10-2022-0133213 (KR), filed on Oct. 17, 2022.
Prior Publication US 2024/0127764 A1, Apr. 18, 2024
Int. Cl. G09G 3/34 (2006.01); G09G 5/00 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 5/008 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A backlight apparatus comprising:
a plurality of blocks, each of the plurality of blocks comprising a plurality of light emitting elements;
a master driving circuit configured to generate a transmission frame comprising a training period and a data period, the training period comprising a clock training pattern, and the data period comprising a plurality of data packets respectively corresponding to the plurality of blocks; and
a plurality of slave driving circuits respectively corresponding to the plurality of blocks and connected to the master driving circuit in a daisy chain structure, each of the plurality of slave driving circuits configured to:
receive the transmission frame through the daisy chain structure,
recover a clock based on the clock training pattern,
drive the plurality of light emitting elements in a corresponding block among the plurality of blocks based on its own data packet among the plurality of data packets, and
transfer a masked frame obtained by masking at least a portion of the data period as the transmission frame of a next slave driving circuit among the plurality of slave driving circuits.