Touch Display Panel Switch Circuit for Unified Control
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Solution Overview
Problem
Conventional touch display panels face challenges in seamlessly integrating touch functionality with display driving mechanisms, particularly in in-cell touch panels, where efficient coordination between touch sensing and display operations is hindered by the need for separate control signals and circuits.
Innovation Solution
The integration of a switch circuit within the touch display panel or driving chip allows for unified control of touch and display functions by using specific control pins to toggle between touch sensing and display driving modes, enabling efficient operation with either TDDI or display driving chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate control signals and circuits are used for touch sensing and display driving, then touch functionality can be integrated with display, but control complexity and circuit coordination difficulty increase
Solution Approach 1:
The patent merges the touch sensing control and display driving control into a single unified control circuit. The controller is configured to output both the first control signal for the touch sensing unit and the second control signal for the display unit, eliminating the need for separate control circuits and reducing overall system complexity while maintaining both functionalities.
Solution Approach 2:
The controller is designed as a multi-functional device that can perform both touch sensing control and display driving control. By using a single controller that can generate different types of control signals (first control signal for touch, second control signal for display), the system achieves versatility without increasing circuit complexity.
2Adaptability or versatility
If in-cell touch panel structure is used, then display and touch functions are combined in same layer, but coordination between touch sensing and display operations becomes difficult
Solution Approach 1:
The controller dynamically switches between different control modes based on operational requirements. It can output the first control signal for touch sensing operations or the second control signal for display operations, allowing flexible coordination between touch and display functions within the in-cell structure without operational difficulties.
Data Source
AI summary
A display device includes a touch display panel, a switch circuit, and a driver chip. The touch display panel includes a touch circuit and a display circuit. The driver chip is coupled to the display circuit for driving the touch display panel to display images. The driver chip is coupled to the touch circuit through the switch circuit, for turning off a touch function of the touch display panel. The disclosure also provides a touch display panel.