Title:
INFRARED DRIVE CIRCUIT FOR SMART PEN
Document Type and Number:
WIPO Patent Application WO/2022/007137
Kind Code:
A1
Abstract:
An infrared drive circuit for a smart pen, relating to the technical field of smart pens, and comprising: an interface terminal; a voltage conversion chip; a pressure sensor; a switch transistor, a base end of the switch transistor being connected to an output end of the pressure sensor to enable, on the basis of an activation signal, a switching operation for a converted voltage, and an emitter of the switch transistor being connected to an output end of the voltage conversion chip; and an infrared transceiver circuit, an input end of the infrared transceiver circuit being connected to a collector of the switch transistor, so that after the pressure sensor generates an activation signal, the infrared transceiver circuit generates infrared light and acquires reflected infrared light. The infrared drive circuit for a smart pen can quickly start infrared emission and signal acquisition operations on the basis of pressure signals.
Inventors:
LU QIWEI (CN)
CHEN FANGYUAN (CN)
LU YANG (CN)
CHEN PENGYU (CN)
CHEN FANGYUAN (CN)
LU YANG (CN)
CHEN PENGYU (CN)
Application Number:
PCT/CN2020/110943
Publication Date:
January 13, 2022
Filing Date:
August 25, 2020
Export Citation:
Assignee:
SHENZHEN EAGLESOUL EDUCATION SERVICE CO LTD (CN)
International Classes:
G06F3/0354; G06F3/038
Foreign References:
| CN110399050A | 2019-11-01 | |||
| CN210488511U | 2020-05-08 | |||
| CN107479300A | 2017-12-15 | |||
| CN106790861A | 2017-05-31 | |||
| US20190107892A1 | 2019-04-11 | |||
| JP2019133239A | 2019-08-08 |
Attorney, Agent or Firm:
SHENZHEN YU MEI PATENT AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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