Touch Control Driving Unit for Narrow-Frame Displays
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Solution Overview
Problem
Existing touch control driving circuits have complex structures, large areas, unstable outputs, and high noise levels, which hinder narrow-frame designs and effective touch control operations.
Innovation Solution
A touch control driving unit comprising a shift register module, a strobe module, and an output module, with optional amplifying and logic gate components, is designed to generate and control stable touch control signals, reducing noise and complexity, and facilitating a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a driving chip is used to input touch control signals to each scanning electrode, then the touch control function can be achieved, but the structure becomes complicated
Solution Approach 1:
The patent divides the driving function into multiple cascaded touch control driving units, where each unit drives one scanning electrode and generates triggering signals for the next stage. This segmentation replaces the need for a complex driving chip while achieving the same touch control function through modular, simplified units.
2Ease of operation
If existing touch control driving circuits are used, then the touch control operation can be performed, but the circuit occupies large area which disables narrow-frame design
Solution Approach 1:
The touch control driving units are designed with nested functional modules where the shift register module, strobe module, and output module are integrated in a compact cascaded structure. This nesting approach reduces the overall circuit area while maintaining the complete touch control operation functionality.
3Ease of operation
If existing touch control driving circuits are used, then the touch control signal can be output, but the output is unstable and noise is high
Solution Approach 1:
The patent introduces a strobe module as an intermediary between the shift register module and the output module. This strobe module controls the output module to select between outputting stable levels or touch control signals, thereby stabilizing the output and reducing noise while maintaining the touch control signal output function.
Data Source
AI summary
A touch control driving unit includes a shift register module, a strobe module and an output module, wherein the shift register module includes a first control port, an incoming port and a triggering signal outgoing port, is connected to the strobe module, and is configured to generate a triggering signal; the strobe module includes a second control port and a strobe signal port, is connected to the shift register module, and is configured to control the output module; and the output module includes an outgoing port, a stable level port and a touch control signal port, and is configured to output a stable level or a touch control signal under control of the strobe module.