Touch Panel Shift Register Circuit Integration
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Solution Overview
Problem
Capacitive touch screens face interference and accuracy issues due to long lead wires and varying loads, which increase the complexity of drive signals and detection accuracy.
Innovation Solution
A touch panel design with a touch shift register circuit directly integrated on the base substrate, reducing lead wire lengths and number, and featuring touch scanning and sensing electrodes arranged in intersecting directions with bridging portions, to improve signal detection and integration with display driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If long lead wires are used to connect the touch shift register circuit to the touch scanning electrodes, then the circuit can be integrated on the base substrate, but signal interference and detection accuracy deteriorate
Solution Approach 1:
The patent applies dimensionality change by transitioning from planar wiring to three-dimensional stacked architecture. The touch shift register circuit is integrated on the base substrate in one layer, while touch scanning and sensing electrodes are arranged in intersecting directions in subsequent layers. This vertical stacking reduces lead wire lengths significantly while maintaining circuit functionality, thereby improving detection accuracy by minimizing signal interference.
2Adaptability or versatility
If varying loads are introduced due to different lead wire lengths, then circuit flexibility is improved, but drive signal complexity increases
Solution Approach 1:
The patent merges the touch shift register circuit with the base substrate integration, creating a unified structure where the circuit and electrodes share the same substrate platform. This consolidation eliminates the need for separate lead wire connections, standardizing the electrical load across all touch scanning electrodes and simplifying drive signal requirements while maintaining circuit flexibility.
3Area of stationary object
If touch scanning and sensing electrodes are arranged in intersecting directions, then touch detection coverage is improved, but electrode connection complexity increases
Solution Approach 1:
The patent resolves the electrode connection complexity by utilizing vertical stacking. Touch scanning electrodes and sensing electrodes are arranged in intersecting directions across different layers, with bridging portions connecting adjacent electrodes vertically. This three-dimensional arrangement achieves comprehensive touch detection coverage while simplifying connections through the layered structure.
Solution Approach 2:
The patent introduces bridging portions as intermediary elements to connect adjacent touch scanning electrode portions in different layers. These bridging portions serve as mediators that simplify the connection between intersecting electrodes, reducing the overall connection complexity while maintaining the intersecting arrangement for comprehensive detection coverage.
Data Source
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AI summary
A touch panel, a touch device with the touch panel and a method of manufacturing the touch panel are provided. The touch panel (001) includes a base substrate, a touch structure and a touch shift register circuit (210). The touch structure includes: touch scanning electrodes (004), arranged on the base substrate along a first direction; and touch sensing electrodes (005), arranged on the base substrate along a second direction, the first direction intersecting with the second direction. The touch shift register circuit (210) is arranged on the base substrate, electrically connected to the touch scanning electrodes (004) and configured to provide touch scanning signals to the touch scanning electrodes (004). The touch panel (001) can solve problems of load increase caused by interference of a side signal to lead wires of the touch scanning signals and different loads caused by different lengths of the lead wires, improve detection accuracy, lower the requirement for drive signals, and is beneficial to implementation of touch and display driving integration.