US 11,659,281 B2
Blur compensation circuit for optical image stabilization device
Kyu Ho Kim, Daejeon (KR); Jin Kook Yun, Daejeon (KR); Dong Gil Jeong, Daejeon (KR); and Ho Jeong Jin, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Nov. 24, 2021, as Appl. No. 17/456,517.
Claims priority of application No. 10-2020-0159517 (KR), filed on Nov. 25, 2020.
Prior Publication US 2022/0166926 A1, May 26, 2022
Int. Cl. H04N 23/68 (2023.01); H03M 3/00 (2006.01)
CPC H04N 23/687 (2023.01) [H03M 3/30 (2013.01); H04N 23/6812 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A blur compensation circuit of an optical image stabilization device, comprising:
a movement detection circuit configured to provide a movement detection signal corresponding to a movement of a photographing module;
a position detection circuit configured to provide a position signal of an actuator for driving the photographing module;
a delta-sigma conversion circuit configured to generate control data corresponding to a deviation between the movement detection signal and the position signal, perform a delta-sigma conversion on the control data, and output driving data corresponding to a result of the delta-sigma conversion; and
a driving circuit configured to control driving of the actuator by the driving data,
wherein the delta-sigma conversion unit configured to generate filtering data including an image having a sampling rate higher than the control data, perform the delta-sigma conversion on the filtering data, and output the driving data generated by converting the number of bits of conversion data corresponding to the delta-sigma conversion.