Title:
CLOCK CALIBRATION METHOD FOR TOUCH CONTROL CHIP, TOUCH CONTROL CHIP, AND TOUCH CONTROL DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/012436
Kind Code:
A1
Abstract:
A clock calibration method for a touch control chip, a touch control chip, and a touch control display apparatus, relating to the field of touch control. First, the clock period corresponding to the current frequency of a frame synchronization signal of a display screen connected to a touch control chip is used as a reference clock period of the touch control chip, so that clock calibration of the touch control chip better meets a standard. Then, the actual number of clocks in the reference clock period is calculated by means of a counter, and a first clock deviation value between the actual number of clocks and the theoretical number of clocks is obtained; when the first clock deviation value exceeds a first threshold, this indicates that the clock of the touch control chip is inaccurate, and in this case, the counter feeds back the first clock deviation value to a register and calibrates the clock frequency of the touch control chip by means of the register. Automatic clock detection and calibration can be implemented in the form of hardware by means of the counter and the register, the calibration mode is simple, and the calibration precision is high.
Inventors:
FU PEIPEI (CN)
CHEN XIFA (CN)
LUO FEI (CN)
CHEN XIFA (CN)
LUO FEI (CN)
Application Number:
PCT/CN2023/106731
Publication Date:
January 18, 2024
Filing Date:
July 11, 2023
Export Citation:
Assignee:
FOCALTECH SYSTEMS SHENZHEN CO LTD (CN)
International Classes:
G06F3/041; G06F1/08
Foreign References:
| CN115097961A | 2022-09-23 | |||
| CN113721702A | 2021-11-30 | |||
| CN104143321A | 2014-11-12 | |||
| CN103299258A | 2013-09-11 | |||
| CN111934678A | 2020-11-13 | |||
| CN103513698A | 2014-01-15 | |||
| CN108111166A | 2018-06-01 | |||
| JP2015191120A | 2015-11-02 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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