Touch Display Gate Driver Load Rotation for Longer Lifespan
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Solution Overview
Problem
Conventional in-cell touch display panels experience premature aging and failure of gate electrode driver circuits due to uneven load distribution during touch periods, leading to reduced lifespan and reliability.
Innovation Solution
Implement a driving method where gate electrode driver circuits output square wave signals at varying levels in alternating touch periods, reducing the cumulative time a single circuit remains in a high-level state, and using a control circuit to dynamically adjust load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate electrode driver circuits output square wave signals at fixed levels during touch periods, then touch functionality is maintained, but certain circuits age faster and fail prematurely
Solution Approach 1:
The patent implements periodic action by cycling through different gate electrode driver circuits at fixed intervals during touch periods. Instead of continuously using the same circuit, the system switches between multiple circuits in a rotational manner, allowing each circuit to rest and recover while maintaining continuous touch functionality. This periodic switching prevents cumulative stress on any single circuit, thereby extending the overall lifespan of the driver circuit system.
Solution Approach 2:
The patent applies dynamics by making the active gate electrode driver circuit variable rather than static. The system dynamically switches between different circuits based on a predetermined sequence, transforming the fixed assignment into a flexible, time-varying configuration. This dynamic allocation ensures that no single circuit is permanently overloaded, balancing the workload across all circuits over time.
2Reliability
If the same gate electrode driver circuit continuously outputs square wave signals during touch periods, then touch detection is consistent, but load distribution becomes uneven causing premature aging
Solution Approach 1:
The system employs periodic action through rotational switching of gate electrode driver circuits. Each circuit is activated for a predetermined number of touch periods followed by a rest period, creating a cyclic pattern that distributes load uniformly across all circuits. This periodic rotation maintains touch detection consistency while preventing any single circuit from bearing continuous load, thereby achieving stable load distribution.
Solution Approach 2:
The patent applies segmentation by dividing the gate electrode driver circuits into multiple groups and assigning them to different time slots. Instead of using a single circuit for all touch periods, the system segments the workload across multiple circuits, with each circuit handling a specific portion of the total load. This segmentation strategy ensures even load distribution while maintaining overall system reliability.
3Reliability
If gate electrode driver circuits remain in high-level state during touch periods, then square wave signals are output correctly, but cumulative time in high state increases causing accelerated aging
Solution Approach 1:
The patent implements periodic action by rotating which circuit remains in the high-level state during touch periods. Each circuit is assigned to the high-state position for a predetermined number of cycles, then switched to a lower state, allowing it to recover. This periodic rotation ensures that no single circuit accumulates excessive high-state duration, maintaining signal output accuracy while controlling cumulative stress on individual circuits.
Solution Approach 2:
The system applies dynamics by making the high-state assignment variable over time. Instead of a static assignment where one circuit permanently holds the high-level state, the system dynamically rotates this responsibility among different circuits. This dynamic allocation reduces the cumulative high-state duration for any given circuit while maintaining the necessary signal output functionality.
Data Source
AI summary
The present application provides a touch display device and a driving method thereof, the method includes: in each of the display periods of the frame cycle, the gate electrode driver circuits sequentially output scan signals to rows of the pixel units; in the touch period of each of the frame cycles, the gate electrode driver circuit of a default level in the gate electrode driver circuits outputs a square wave signal to at least one row of the pixel units; wherein the levels of the gate electrode driver circuits corresponding to the touch periods of different ones of the frame cycles are different. The touch display device and the driving method thereof provided by the present application can prolong the use lifespan of the gate electrode driver circuits.