Title:
DRIVE CIRCUIT, LIGHT-EMITTING UNIT, TRANSMISSION MODULE, SENSING APPARATUS, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/165821
Kind Code:
A1
Abstract:
A drive circuit (20), a light-emitting unit (110), a transmission module (11), a sensing apparatus (10) and an electronic device (1). The drive circuit (20) comprises a sensing light source (22) and a switch transistor (23), the sensing light source (22) and the switch transistor (23) are connected in series between a first power supply (14) and the ground, the sensing light source (22) is used for emitting a sensing light pulse when the switch transistor (23) is turned on, and the sensing light pulse is used for irradiating an external object to sense related information. The drive circuit (20) further comprises an energy storage capacitor (25) connected between a first node N1 and the ground, the sensing light source (22) and the switch transistor (23) are connected in series between the first node N1 and the ground, the first node N1 is further connected to the first power supply (14), and the energy storage capacitor (25) is used for pre-storing electric energy and discharging the sensing light source (22) when the switch transistor (23) is turned on. The light-emitting unit (110), the transmission module (11), the sensing apparatus (10) and the electronic device (1) comprise the drive circuit (20).
Inventors:
WANG XIAOMING (CN)
LV CHENJIN (CN)
LI JIAPENG (CN)
LV CHENJIN (CN)
LI JIAPENG (CN)
Application Number:
PCT/CN2021/075890
Publication Date:
August 11, 2022
Filing Date:
February 07, 2021
Export Citation:
Assignee:
SHENZHEN FUSHI TECH CO LTD (CN)
International Classes:
G01S17/14; G01S7/484; G01S7/4861
Foreign References:
| CN211236240U | 2020-08-11 | |||
| JP2019068528A | 2019-04-25 | |||
| CN209805094U | 2019-12-17 | |||
| CN101588014A | 2009-11-25 |
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