US 12,429,664 B2
Camera module
Jung Bae Park, Seoul (KR); and Ui Jun Kim, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/757,284
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Dec. 10, 2020, PCT No. PCT/KR2020/018070
§ 371(c)(1), (2) Date Jun. 13, 2022,
PCT Pub. No. WO2021/118264, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 10-2019-0164871 (KR), filed on Dec. 11, 2019.
Prior Publication US 2023/0003965 A1, Jan. 5, 2023
Int. Cl. H04N 23/54 (2023.01); G02B 3/14 (2006.01); G02B 7/02 (2021.01); G02B 7/08 (2021.01); H04N 23/55 (2023.01)
CPC G02B 7/028 (2013.01) [G02B 3/14 (2013.01); G02B 7/08 (2013.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01)] 15 Claims
OG exemplary drawing
 
1. A camera module comprising:
a lens assembly including a liquid lens having a first liquid and a second liquid that form an interface;
a temperature sensor configured to detect temperature information of the liquid lens;
a controller configured to adjust the interface by applying a driving signal to the liquid lens;
a signal processing compensation unit configured to output feedback information, in which an inclination of a first diopter of the liquid lens according to the driving signal is proportional to a temperature in a first region and an inclination of a second diopter of the liquid lens according to the driving signal is inversely proportional to a temperature in a second region that is different from the first region, to the controller;
wherein the signal processing compensation unit is configured to calculate a first-first driving function for a plurality of first driving signals, a second-first driving function for a plurality of second driving signals, a first-second driving function for a plurality of third driving signals, and a second-second driving function for a plurality of fourth driving signals,
wherein the first diopter and the second diopter are different from each other,
wherein the signal processing compensation unit is configured to calculate a plurality of third-first driving functions for each temperature from the first-first driving function and the second-first driving function and calculate the feedback information based on at least one of the first-first driving function, the second-first driving function, and the plurality of third-first driving functions, and
wherein the plurality of third-first driving functions are linear functions of the driving signal for the first or second diopter at a specific temperature.