Touch-Control Display Panel Perpendicular Electrode Overlap
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Solution Overview
Problem
Touch-control display panels in vertical electric field mode face reduced transmission rates and increased manufacturing costs due to additional circuits and interference from touch-control wires close to common electrode layers, leading to decreased display performance and accuracy.
Innovation Solution
A touch-control display panel design where the touch-control electrode layer is positioned on one substrate and the first electrode layer is on the other, allowing for perpendicular overlap and connection, reducing coupling capacitance and eliminating the need for touch-control wires on the second substrate, thereby improving signal accuracy and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the touch-control electrode layer is positioned on the color film substrate away from the array substrate, then the transmission rate is improved, but the coupling capacitance increases and signal accuracy deteriorates
Solution Approach 1:
The patent transitions from a planar arrangement where touch-control wires are deployed on the color film substrate to a three-dimensional overlapping arrangement where touch-control electrodes on the color film substrate overlap with first electrodes on the array substrate along the perpendicular direction. This dimensional change reduces coupling capacitance by distributing the electrical connection through multiple layers rather than requiring close lateral proximity of wires and electrodes.
Solution Approach 2:
The patent merges the touch-control electrode layer with the first electrode layer by establishing overlapping relationships between touch-control electrodes and first electrodes along the perpendicular direction. This combining approach eliminates the need for separate touch-control wires on the color film substrate, reducing the number of electrical components and improving signal accuracy while maintaining transmission rate.
2Adaptability or versatility
If additional circuits are added to control the touch-control electrode layer, then touch-control functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The first electrode layer serves dual functions: it acts as a common electrode for display operation and as a touch-control electrode for touch detection. By making these electrode layers multi-functional, the patent eliminates the need for separate additional circuits to control the touch-control electrode layer, thereby reducing manufacturing cost while maintaining full touch-control functionality.
Solution Approach 2:
The existing first electrode layer and common electrode layer serve themselves by functioning as touch-control electrodes without requiring additional control circuits. The overlapping arrangement allows these electrodes to perform both display and touch-control functions autonomously, reducing manufacturing complexity and cost.
3Reliability
If touch-control wires are deployed close to the common electrode layer, then electrical connection is achieved, but coupling capacitance increases and interference occurs
Solution Approach 1:
The patent moves the electrical connection from a lateral planar arrangement (touch-control wires close to common electrode on the same substrate) to a perpendicular three-dimensional arrangement (touch-control electrodes overlapping with first electrodes across substrates). This dimensional transition reduces coupling capacitance interference while maintaining reliable electrical connection through the overlapping electrode structure.
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 touch-control performance by reducing interference and coupling capacitance, improving signal accuracy, and lowering manufacturing costs by eliminating unnecessary electrode layers and wires, resulting in a thinner, lighter, and more efficient touch-control display panel.
Implementation Method 1
Loads between the touch-control wires 071 and the common electrode layer 05 are large because the touch-control wires 071 are close to the common electrode layer 05. Correspondingly, the signals in the touch-control wires 071 are easy to be interfered
Data Source
AI summary
A touch-control display panel, driving method, and a touch-control display device are provided. The touch-control display panel includes: a display area including a plurality of pixels; a non-display area; a first substrate; and a second substrate opposing the first substrate. A portion of the first substrate in the first region includes a pixel electrode layer and a first electrode layer. The first electrode layer is located on a side of the pixel electrode layer away from the second substrate and includes a plurality of first electrodes. The pixel electrode layer includes a plurality of pixel electrodes. A touch-control electrode layer is located on a side of the second substrate toward the first substrate and includes a plurality of touch-control electrodes. Along a direction perpendicular to the touch-control display panel, each touch-control electrode of the plurality of the touch-control electrode overlaps with and connects with one or more first electrode of the plurality of the first electrodes.