Touch-Sensing Display Panel Module Reset and Readout Timing
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Solution Overview
Problem
In-cell type touch-sensing display panels face challenges with insufficient signal readout time and voltage reset time on large-sized panels due to RC delay, affecting their sensing ability.
Innovation Solution
The implementation of a touch-sensing display panel module with multiple gate lines and data lines, including a sensing unit with a signal readout line, storage unit, readout unit, and reset unit, where the signal readout line receives voltage levels and resets the storage unit using gate control signals, and the enable period of gate control signals is overlapped or extended to enhance readout and reset operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a prior art sensing unit with readout TFT switch and reset TFT switch is applied to a large-sized touch panel, then the panel size is increased, but RC delay results in insufficient signal readout time and voltage reset time, thereby influencing the sensing ability
Solution Approach 1:
The patent applies preliminary action by extending the enable period of gate control signals to occur before the pixel refresh period. This allows the sensing unit to perform signal readout and voltage reset operations in advance, ensuring sufficient time for these operations even on large-sized panels where RC delay is significant. The gate control signal remains enabled during the entire pixel refresh period and extends beyond it, preparing the sensing unit beforehand.
Solution Approach 2:
The patent implements dynamics by making the enable period of gate control signals variable and overlapping with the pixel refresh period. The sensing unit dynamically adjusts its operation timing to overlap with the gate control signal enable period, allowing flexible coordination between pixel refreshing and sensing operations. This dynamic timing arrangement ensures adequate readout and reset time while maintaining large panel size.
2Loss of time
If the enable period of gate control signal is extended to overlap with pixel refresh period, then the readout time and reset time are improved, but the complexity of control timing increases
Solution Approach 1:
The patent merges the sensing operations (signal readout and voltage reset) with the pixel refresh operation by overlapping their timing. The gate control signal enable period is combined with the pixel refresh period, allowing both operations to occur simultaneously or in overlapping time windows. This merging approach improves readout and reset time while avoiding the need for completely separate control timing schemes.
Solution Approach 2:
The gate control signal serves multiple functions: it controls both the pixel refresh operation and the sensing unit operations (signal readout and voltage reset). By making the gate control signal universal and having its enable period overlap with both pixel refresh and sensing operations, the patent reduces the need for additional dedicated control signals, thereby managing complexity while improving timing.
Data Source
AI summary
An embedded sensor of a touch panel includes at least a readout unit and a reset unit. The total readout length or the total reset length during each sensing period may be larger than the pixel refresh period by introducing other readout units, introducing other reset units, or increasing the enabling period of the gate driving signals, thereby enhancing the sensibility of the touch panel.


