Touch Display Panel Common Electrode Block Dual Function
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Solution Overview
Problem
Current on-cell touch screen designs for display panels increase thickness and weight, failing to meet user requirements for thin and lightweight displays.
Innovation Solution
A touch display panel design incorporating a lower substrate with gate and data lines, common electrode blocks functioning as touch driving electrodes, a touch sensing chip, and insulated touch sensing electrodes, allowing for touch functionality without additional thickness by using common electrode blocks as both touch driving and sensing electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an on-cell touch screen design is used to achieve touch function, then the touch function is implemented, but the thickness and weight of the display panel are increased
Solution Approach 1:
The common electrode block is designed to serve dual functions: as a common electrode for display operation and as a touch driving electrode for touch sensing. This multi-functionality eliminates the need for separate touch screen layers, thereby reducing weight while maintaining touch functionality
Solution Approach 2:
The touch driving electrode function is merged with the common electrode block, and the touch sensing electrode is integrated into the display panel structure. This consolidation combines display and touch functions into a single integrated structure, reducing overall weight and thickness
2Adaptability or versatility
If an on-cell touch screen design is used to achieve touch function, then the touch function is implemented, but the thickness of the display panel is increased
Solution Approach 1:
The common electrode block performs dual roles as both a common electrode for display and a touch driving electrode, eliminating the need for additional touch screen layers and thereby reducing panel thickness
Solution Approach 2:
The touch sensing functionality is merged into the existing display panel structure by using the common electrode block as the touch driving electrode, consolidating multiple functions into fewer layers and reducing overall thickness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables touch functionality without increasing the display panel's thickness or weight, improving touch sensitivity and reducing power consumption while maintaining high resolution and display quality.
Implementation Method 1
the touch sensing chip is configured to, during a touch time period, apply a touch driving signal to the touch driving electrode, apply a touch sensing signal to the touch sensing electrode, and detect a change of the touch sensing signal on the touch sensing electrode so as to determine a touch position on the touch display panel
Data Source
AI summary
The present disclosure provides a touch display panel and a driving method therefor, and a display device including the touch display panel, relating to the field of display technologies, and enabling a touch function of the display panel without increasing the thickness of the display panel. The touch display panel includes an upper substrate and a lower substrate, a plurality of gate lines and a plurality of data lines provided on the lower substrate and defining a plurality of sub-pixel regions, in each of which at least one common electrode block is provided, at least one common electrode block is configured to also function as a touch driving electrode; the touch display panel further comprises a touch sensing chip and a touch sensing electrode, the touch driving electrode and the touch sensing electrode being respectively electrically connected to output ends of the touch sensing chip; the touch sensing chip is configured to, during a touch time period, apply a touch driving signal to the touch driving electrode, apply a touch sensing signal to the touch sensing electrode, and detect a change of the touch sensing signal on the touch sensing electrode so as to determine a touch position on the touch display panel.