Self-Capacitance Touch Display Panel Merged Electrode Design
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Solution Overview
Problem
Self-capacitance touch display panels face challenges with low pixel aperture opening ratio and transmissivity due to the introduction of touch control wires, which also increase the width of the black matrix, affecting liquid crystal deflections and display quality.
Innovation Solution
The touch electrode wire doubles as a common electrode wire, reducing the need for additional common electrodes and minimizing the black matrix width, thereby increasing pixel aperture opening ratio and transmissivity without compromising the lighting effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch control wires are introduced to enable touch control function, then touch control capability is improved, but aperture opening ratio and transmissivity of pixels deteriorate
Solution Approach 1:
The patent merges the function of touch control wires with the common electrode wire by making them the same physical structure. The common electrode wire serves dual purposes: as part of the common electrode for display function and as the touch control wire for sensing input. This integration eliminates the need for separate touch control wires, thereby increasing the aperture opening ratio while maintaining touch control capability.
Solution Approach 2:
The common electrode wire is designed to perform multiple functions simultaneously: it acts as both the common electrode for the liquid crystal display and as the touch control electrode for detecting user input. This multi-functionality reduces the number of separate components needed, minimizing the black matrix width and improving light transmission.
2Adaptability or versatility
If touch control wires are introduced to enable touch control function, then touch control capability is improved, but transmissivity of pixels deteriorate
Solution Approach 1:
The patent merges the function of touch control wires with the common electrode wire by making them the same physical structure. The common electrode wire serves dual purposes: as part of the common electrode for display function and as the touch control wire for sensing input. This integration eliminates the need for separate touch control wires, thereby increasing the aperture opening ratio while maintaining touch control capability.
Solution Approach 2:
The common electrode wire is designed to perform multiple functions simultaneously: it acts as both the common electrode for the liquid crystal display and as the touch control electrode for detecting user input. This multi-functionality reduces the number of separate components needed, minimizing the black matrix width and improving light transmission.
3Object-affected harmful factors
If black matrix width is increased to shield touch control wires, then shielding effect is improved, but aperture opening ratio and transmissivity deteriorate
Solution Approach 1:
The patent merges the function of touch control wires with the common electrode wire by making them the same physical structure. The common electrode wire serves dual purposes: as part of the common electrode for display function and as the touch control wire for sensing input. This integration eliminates the need for separate touch control wires, thereby increasing the aperture opening ratio while maintaining touch control capability.
Solution Approach 2:
The common electrode wire is designed to perform multiple functions simultaneously: it acts as both the common electrode for the liquid crystal display and as the touch control electrode for detecting user input. This multi-functionality reduces the number of separate components needed, minimizing the black matrix width and improving light transmission.
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
This design enhances pixel aperture opening ratio and transmissivity by reducing the black matrix width, maintaining display quality and ensuring effective light emission without decreasing the lighting effect, thus improving the overall performance of self-capacitance touch display panels.
Implementation Method 1
When a finger touches the touch display panel, a fluctuation in a capacitance of the touch sensor unit is caused at a corresponding position, and a position of the touch can be determined by the drive integrated circuit through detecting the fluctuation in the capacitance
Implementation Method 2
a liquid crystal layer, and a color filter layer in this sequence from the array substrate
Data Source
AI summary
Embodiments of the invention disclose a self-capacitance touch display panel, a display device comprising the self-capacitance touch display panel, and a method of driving the self-capacitance touch display panel, so as to increase aperture opening ratio and transmissivity of pixels of the self-capacitance touch display panel. The self-capacitance touch display panel comprises an array substrate and a color filter substrate that are disposed to face one another, the array substrate comprising a common electrode disposed on a base substrate, the common electrode being configured to double as a plurality of touch electrodes, each touch electrode being electrically connected with a touch electrode wire. The touch electrode wire is configured to double as a common electrode wire.