Patent ID: 11906878
Assignee: SHENZHEN TRANSSION HOLDINGS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for controlling a fill light device, the fill light device comprising a flash light and a light guide, the light guide comprising a first polarizer, a liquid crystal layer, and a second polarizer arranged in sequence, and the light guide being located on a light-exiting side of the flash light, wherein the method comprises:
performing face detection on a preview image of a camera module;
in response to detecting a face in the preview image, performing pupil identification to determine a pupil position;
determining a light-shielding area of the light guide according to the pupil position;
determining a light-emitting angle of the fill light device according to a distance between a capturing target and the fill light device to obtain a control parameter of the light guide; and
changing a shape and/or a light-transmitting area of the light guide according to the control parameter to change a light-exiting area and/or the light-emitting angle of the fill light device.