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.

公开(公告)号：US20210250035A1

公开(公告)日：2021-08-12

申请号：US17014253

申请日：2020-09-08

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： JER-HAU HSU ,  MING-HUANG LIU ,  KIAN-FU WONG

IPC: H03M1/12 ,  G01J1/44

Abstract: A light sensor circuit, which comprising a photodiode and a voltage follower. By setting the voltage follower to reduce the influence from the junction capacitance of the photodiode, a required time of a repeat integration module will not be influenced by the photodiode to efficiently keep the performance and the accuracy of the analog to digital converting device when the light sensor circuit is used to the analog to digital converting device in repeat operation.