US 11,867,817 B2
Camera module and depth information extraction method thereof
Eun Song Kim, Seoul (KR); and Chang Hyuck Lee, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/280,734
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Sep. 26, 2019, PCT No. PCT/KR2019/012524
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/067737, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 10-2018-0116462 (KR), filed on Sep. 28, 2018.
Prior Publication US 2022/0120909 A1, Apr. 21, 2022
Int. Cl. G01S 17/894 (2020.01); G01S 7/481 (2006.01)
CPC G01S 17/894 (2020.01) [G01S 7/4816 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A camera device comprising:
a light output unit configured to output an output light signal to be irradiated to an object;
a lens unit including an infrared (IR) filter and at least one lens disposed on the IR filter, and configured to collect an input light signal reflected from the object;
an image sensor configured to generate an electric signal from the input light signal collected by the lens unit;
a tilting unit configured to shift an optical path of the input light signal according to a predetermined rule; and
an image controller configured to acquire depth information of the object by using a phase difference between the output light signal and the input light signal received by the image sensor,
wherein the image controller acquires the depth information of the object by using data extracted during a plurality of periods during which the optical path of the input light signal is repeatedly shifted according to the predetermined rule, and
the image controller corrects a difference between an actual shift value and a preset shift value of the optical path of the input light signal.