Title:
TOUCH KEY SCANNING CIRCUIT, LOW POWER MODE EXITING METHOD, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/197199
Kind Code:
A1
Abstract:
The present disclosure provides a touch key scanning circuit, a low power mode exiting method, and a device. The touch key scanning circuit comprises a key scanning unit, a trigger unit, and multiple touch keys. The trigger unit comprises one main control switch, and multiple first switches and second switches in one-to-one correspondence. The second switches are in one-to-one correspondence with the touch keys. When the main control switch, the first switches, and the second switches are all closed, the touch key scanning circuit operates in a multi-channel scanning mode. The present disclosure enables, in a low power mode, detection of a trigger signal of any touch key based on the multi-channel scanning mode, and allows an immediate exit from the low power mode upon detecting the trigger signal of any touch key. The invention significantly accelerates an exit from the low power mode, such that the average power consumption in the low power mode is greatly reduced while improving device touch key wake-up experience in the low power mode.
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Inventors:
XUE SHENG (CN)
LI QIFENG (CN)
HUANG TAO (CN)
LI QIFENG (CN)
HUANG TAO (CN)
Application Number:
PCT/CN2021/082980
Publication Date:
October 07, 2021
Filing Date:
March 25, 2021
Export Citation:
Assignee:
BYD SEMICONDUCTOR COMPANY LTD (CN)
International Classes:
H03M11/20
Foreign References:
| CN108259044A | 2018-07-06 | |||
| CN110347439A | 2019-10-18 | |||
| CN210199719U | 2020-03-27 | |||
| CN102132232A | 2011-07-20 |
Attorney, Agent or Firm:
BEYOND TALENT PATENT AGENT FIRM (CN)
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