US 11,991,428 B2
Camera module including a lens assembly including a liquid lens
Ui Jun Kim, Seoul (KR); and Jung Bae Park, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/753,956
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Sep. 18, 2020, PCT No. PCT/KR2020/012615
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/054760, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0114991 (KR), filed on Sep. 18, 2019.
Prior Publication US 2023/0353849 A1, Nov. 2, 2023
Int. Cl. H04N 5/335 (2011.01); G02B 3/14 (2006.01); H04N 23/52 (2023.01); H04N 23/65 (2023.01)
CPC H04N 23/52 (2023.01) [G02B 3/14 (2013.01); H04N 23/65 (2023.01)] 7 Claims
OG exemplary drawing
 
1. A camera module comprising:
a lens assembly including a liquid lens including a first liquid and a second liquid that form an interface therebetween;
a voltage controller that applies a driving signal to the liquid lens to adjust the interface;
a temperature sensor that detects temperature information of the liquid lens;
an image sensor that receives light passing through the lens assembly;
a sensing unit that detects information corresponding to the interface of the liquid lens; and
a compensation unit that outputs feedback information to the voltage controller using the information corresponding to the interface of the liquid lens and the temperature information,
wherein the compensation unit includes:
a first input part that receives the information corresponding to the interface;
a second input part that receives the temperature information; and
a data part that stores a plurality of first driving signals for a first diopter of the liquid lens for each temperature and a plurality of second driving signals for a second diopter of the liquid lens for each temperature;
wherein the camera module comprises:
a first calculating unit that calculates a third diopter of the liquid lens using the first driving signal; and
a second calculating unit that calculates the feedback information corresponding to the temperature information and the third diopter using at least one of the plurality of first driving signals and the plurality of second driving signals,
wherein the second calculating unit calculates a first driving function for the plurality of first driving signals and a second driving function for the plurality of second driving signals, and
wherein the second calculating unit calculates a plurality of third driving functions for each temperature from the first driving function and the second driving function.