US 11,908,364 B2
Low-power display driving circuit performing internal encoding and decoding and operating method thereof
Byeongcheol Jang, Seoul (KR); Yonghoon Yu, Suwon-si (KR); Hongki Kwon, Seongnam-si (KR); Taewoo Kim, Hwaseong-si (KR); Jinyong Park, Suwon-si (KR); Hyunwook Lim, Seoul (KR); Woohyuk Jang, Hwaseong-si (KR); and Hojun Chung, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Aug. 31, 2021, as Appl. No. 17/462,646.
Claims priority of application No. 10-2020-0123322 (KR), filed on Sep. 23, 2020; and application No. 10-2021-0061644 (KR), filed on May 12, 2021.
Prior Publication US 2022/0093026 A1, Mar. 24, 2022
Int. Cl. H04N 19/00 (2014.01); G09G 3/20 (2006.01); G09G 5/00 (2006.01)
CPC G09G 3/20 (2013.01) [G09G 5/003 (2013.01); G09G 2320/103 (2013.01); G09G 2330/021 (2013.01); G09G 2340/02 (2013.01); G09G 2360/12 (2013.01); G09G 2370/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display driving circuit for outputting a still image, the display driving circuit comprising:
a memory configured to store an input bit stream encoded by a first encoder based on said still image;
a normal data path including a first decoder;
a low-power data path including a second decoder;
a controller configured to selected one of the normal data path and the low-power data path through which output frame data in a second frame period passes according to whether internal encoding is successful in a first frame period,
wherein, when the internal encoding is successful, the controller is configured to perform internal encoding in the second frame period, to store a generated internal bit stream in the memory, to allow the internal bit stream to pass through the low-power data path to generate the output frame data, and
when the internal encoding fails, the controller is configured to generate the output frame data by allowing the input bit stream to pass through the normal data path in the second frame period, to change an encoding setting of an internal encoder, and to repeat the internal encoding.