公开(公告)号：US20210282246A1

公开(公告)日：2021-09-09

申请号：US17025271

申请日：2020-09-18

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： CHENG-FENG LIU ,  MENG-YONG LIN

IPC: H05B47/115 ,  H05B47/11

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：US20230328391A1

公开(公告)日：2023-10-12

申请号：US18067057

申请日：2022-12-16

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： SI-YUAN CHEN ,  CHENG-FENG LIU

IPC: G01J1/42 ,  H04N23/745

CPC classification number: H04N23/745 ,  G01J1/4204

Abstract: An operation method of an optical sensor comprising receiving an ambient light by a light-sensing device. Record a signal generated by the light-sensing device after receiving the ambient light by a operation unit. A flicker frequency of the ambient light is determined by the operation unit. A signal operation parameter is set according to the flicker frequency, and the signal operation parameter comprises a sampling time difference, which is the starting time interval of two corresponding integration time periods of a plurality of integration time periods. Furthermore, the light-sensing device and the operation unit start the calculation of the intensity of the ambient light, so that the flicker component of an ambient light source may be eliminated from the light sensing result to produce a stable sensing result.

公开(公告)号：US20220312570A1

公开(公告)日：2022-09-29

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 ,  H05B47/155 ,  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.