TOUCH SENSOR CONTROL CIRCUIT AND INDICATOR DEVICE PARTNING THE SAME
The touch sensor control circuit addresses touch errors by differentially detecting voltages between RX wires using distinct reference voltages, enhancing accuracy and reducing power consumption.
DE102025148684A1Undetermined Publication Date: 2026-07-02LG DISPLAY CO LTD
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Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- LG DISPLAY CO LTD
- Filing Date
- 2025-11-24
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Fringe capacitance on RX wires near TX wires causes touch performance degradation in touch sensor control circuits, leading to touch errors and reduced accuracy.
Method used
Implement a touch sensor control circuit with a detection circuit that differentially detects voltages between RX wires closest to TX wires and those farther away, using distinct reference voltages to compensate for stray capacitance, thereby enhancing touch performance and preventing errors.
Benefits of technology
The solution effectively reduces touch errors by compensating for stray capacitance, improving touch accuracy and enabling low-power control in touch sensor systems.
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Abstract
A touch sensor control circuit comprises a control circuit (211) for applying a control signal to first touch electrodes (TX) arranged in a display area (AA) by means of a plurality of TX wires (TXL1, ..., TXLm); and a detection circuit (212) for detecting voltages of second touch electrodes (RX) arranged in a first area and second area (A1, A2) within the display area (AA) by means of first RX wires and second RX wires (RXL_G2), respectively, wherein the voltages are generated by the control signal. The detection circuit (212) can detect a voltage difference between a voltage detected by an nth (where n is a natural number) RX wire positioned closest to TX wires located on opposite outermost sides of the majority of TX wires (TXL1, ...A display device is also disclosed. The device is designed to amplify or integrate a voltage difference between a voltage determined by an (n+1)-th RX wire (RXLn+1) adjacent to the n-th RX wire (RXLn) and a first reference voltage (Vref1) that is different from the second reference voltage (Vref2). The device is designed to measure the ...
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