公开(公告)号：US11419198B2

公开(公告)日：2022-08-16

申请号：US17025271

申请日：2020-09-18

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： Cheng-Feng Liu ,  Meng-Yong Lin

IPC: H05B47/11 ,  H05B47/115

Abstract: A light sensor and control method thereof, which controls the light sensor comprising a first light emitted element, a second light emitted element, a first light sensing element and a control circuit. The light wavelength of the second light emitted element is greater than the light wavelength of the first light emitted element. The control circuit is coupled to the first and second light elements and the first light sensing element. When the display of an electronic device is in a light-up status, the control circuit switches on the first light emitted element to emit light; when the display of the electronic device is in a light-off status, the control circuit switches on the second light emitted element to emit light. Thus, it will prevent from the influence to the image of the display, and obtained the better sensing ability.

公开(公告)号：US11882637B2

公开(公告)日：2024-01-23

申请号：US17587035

申请日：2022-01-28

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： Meng-Yong Lin ,  Ming-Huang Liu ,  Jer-Hau Hsu ,  Cheng-Feng Liu

IPC: H05B47/11 ,  H05B47/17 ,  H05B47/165 ,  H05B47/155

CPC classification number: H05B47/11 ,  H05B47/155 ,  H05B47/165 ,  H05B47/17

Abstract: An operation method of a proximity sensor comprises: controlling a light-emitting element by a processing circuit. Such control includes a plurality of light source on and light source off operations. An optical sensor receives light and outputs a sensing signal corresponding to the intensity of the light. The processing circuit computes the sensing signal to produce a sensing result. The plurality of light source on and light source off operations includes a group having two light sources on operations and two light sources off operations. The two light sources on operations in the group or the two light sources off operations in the group are performed consecutively. In this way, the ambient light components of the light source on and off operations may cancel out each other to reduce the ambient light components contained in the sensing results.