GOA Matrix Touch Sensing Device Driving Signal Delay
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Solution Overview
Problem
Conventional touch sensing devices require a large number of driving signals proportional to the number of rows, leading to increased complexity and cost as resolution increases, making it challenging to efficiently drive and sense touch events in high-resolution systems.
Innovation Solution
The implementation of a touch sensing device utilizing a plurality of gate driver on array (GOA) circuits, where primary and secondary GOAs are electrically coupled in series to receive clock signals, allowing for sequential detection of sensing signals from touch modules, reducing the need for a separate driving unit and simplifying the driving mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of driving signals is increased proportionally to the number of rows in the touch panel, then the touch sensing resolution is improved, but the complexity and cost of the driving unit increases
Solution Approach 1:
The patent combines the driving unit and sensing unit functions into the touch panel structure itself by integrating GOA circuits. The GOA circuits are formed within the touch panel layers, merging the previously separate driving unit with the panel structure, thereby reducing overall system complexity while maintaining high-resolution sensing capability
Solution Approach 2:
The touch panel structure provides its own driving signals through the integrated GOA circuits, eliminating the need for an external driving unit. The sensing signals are also detected within the same integrated structure, allowing the system to serve itself without additional external components, thus reducing complexity and cost
2Measurement precision
If the number of driving signals is increased proportionally to the number of rows in the touch panel, then the touch sensing resolution is improved, but the cost of the driving unit increases
Solution Approach 1:
The patent merges the driving unit functionality into the touch panel structure through integrated GOA circuits. This consolidation eliminates the need for separate external driving components, reducing the total component count and manufacturing cost while enabling high-resolution sensing
Solution Approach 2:
The integrated GOA circuits within the touch panel generate and distribute driving signals autonomously, eliminating the need for expensive external driving units. This self-service approach reduces bill of materials cost and simplifies the manufacturing process
3Ease of operation
If a separate driving unit is used to provide driving signals, then the touch sensing operation is simplified, but the device complexity increases
Solution Approach 1:
The patent merges the driving unit and sensing unit into a single integrated structure within the touch panel. The GOA circuits are formed using the same TFT technology and are embedded within the touch panel layers, creating a unified device that performs both driving and sensing functions without requiring separate external components
Data Source
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AI summary
The present invention, in one aspect, relates to a touch sensing device. In one embodiment, the touch sensing device includes a plurality of touch modules spatially arranged in a form of a matrix having a plurality of rows and a plurality of columns, and a plurality of GOAs configured to receive a clock signal. Each GOA has an input for receiving a driving signal and an output for responsively outputting a delayed driving signal by a time interval to a respective touch module. The plurality of GOAs is spatially arranged in a form of a matrix such that each GOA is disposed adjacent to and associated with a corresponding touch module. The plurality of GOAs is electrically coupled to each other in series as a chain such that the output of any one but the last GOA in the chain is connected to the input of its immediate next GOA in the chain, so that, in response to a start signal applied to the first GOA in the chain, sensing signals from successive corresponding touch modules are sequentially detected by a plurality of sensing devices.