Display driving chip, touch chip, and signal processing method therefor

WO2026153431A1PCT designated stage Publication Date: 2026-07-23HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HUAWEI TECH CO LTD
Filing Date
2026-01-15
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

In flexible screens, the closer the touch screen sensing area and the display module are, the more serious the crosstalk problem between the display and the touch becomes, affecting touch sensitivity and reporting accuracy.

Method used

The display driver chip sends a source drive signal to the display screen through a first sending interface and a non-periodic control signal to the touch chip through a second sending interface. The control signal changes with the source drive signal to accurately characterize the location of display noise, and the touch chip performs shielding based on this signal.

Benefits of technology

It reduces interference between the display driver chip and the touch chip, improves touch sensitivity and reporting accuracy, and simplifies design costs and complexity.

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Abstract

Embodiments of the present application relate to the technical field of chips, and provide a display driving chip, a touch chip, and a signal processing method therefor, reducing interference between signals of the display driving chip and signals of the touch chip and improving touch sensitivity and point reporting accuracy. The specific solution is as follows: the display driving chip comprises a first transmission interface and a second transmission interface. The first transmission interface is used for transmitting a source driving signal to a display screen, and the second transmission interface is used for transmitting a control signal to the touch chip. The control signal is an aperiodic signal, and the control signal changes when the source driving signal for the display screen changes. The embodiments of the present application are applied to a touch signal acquisition process.
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