Integrated Touch Display Driving Unit Circuit Design
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Solution Overview
Problem
Existing mutual-capacitive touch display screens require complex shift circuits for driving touch electrodes, occupying significant panel space and limiting flexibility in scanning sequences.
Innovation Solution
A driving unit and method that integrates a touch control driving module and a display driving module with a gating signal input, allowing the driving IC to directly provide control signals, simplifying the circuit design and enhancing flexibility by eliminating the need for a separate shift circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate shift circuit is designed to drive touch electrodes, then the touch detection function is achieved, but the panel space is significantly increased and the circuit structure becomes complex
Solution Approach 1:
The patent merges the shift circuit functionality into the driving IC, eliminating the need for a separate shift circuit on the panel. The driving IC integrates both the driving function and the shift function, thereby simplifying the overall circuit structure while maintaining the touch detection function.
Solution Approach 2:
The driving IC is designed to perform multiple functions: it serves as both the driving circuit for the display and the shift circuit for touch electrode scanning. This multi-functional design reduces the number of separate components needed on the panel.
2Reliability
If a separate shift circuit is designed to drive touch electrodes, then the touch detection function is achieved, but the panel space occupied by the driving circuit is increased
Solution Approach 1:
The patent merges the shift circuit functionality into the driving IC, eliminating the need for a separate shift circuit on the panel. The driving IC integrates both the driving function and the shift function, thereby simplifying the overall circuit structure while maintaining the touch detection function.
3Productivity
If a shift circuit is used to scan touch electrodes in a specified sequence, then the touch electrodes are driven systematically, but the flexibility in controlling the scanning sequence is reduced
Solution Approach 1:
The patent implements dynamic control of the scanning sequence through software configuration in the driving IC. The scanning sequence can be flexibly adjusted and reconfigured without changing the hardware circuit structure, allowing adaptive control strategies to be implemented.
Solution Approach 2:
The patent allows flexible control of the scanning sequence by changing control parameters (such as scan order, scan timing, and selection signals) through software rather than hardware reconfiguration. This enables the same circuit to adapt to different control requirements.
Data Source
AI summary
A driving unit, a driving method, a driving circuit, and a display panel are disclosed. The driving unit is for providing a signal to a touch electrode of an array substrate, comprising: a first control signal input terminal, a second control signal input terminal, a gating signal input terminal, a touch control driving module, a display driving module, and a signal output terminal. The touch control driving module is configured to output a touch control signal to the signal output terminal, and is controlled by a signal inputted through the first control signal input terminal, a signal inputted through the second control signal input terminal, and a signal inputted through the gating signal input terminal. The display driving module is configured to output a common voltage signal to the signal output terminal, and is controlled by the signal inputted through the gating signal input terminal.