Touch Display Panel Conductive Structure Layer Reduction
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Solution Overview
Problem
Twisted nematic (TN) mode LCD panels integrated with touch-control functions have complex structures, larger product thickness, and higher manufacturing costs due to the need for multiple layers of base substrates.
Innovation Solution
A touch display panel design featuring a first substrate with a touch electrode and a second substrate with a touch line, where a conductive structure electrically connects the touch electrode to the touch line, eliminating the need for an additional touch panel and simplifying the structure by reducing the number of layers and wirings, while allowing for a larger distance between touch electrodes and signal lines to enhance sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is directly disposed on a TN mode LCD panel with each comprising two layers of base substrates, then touch-control function is achieved, but the structure becomes complex and product thickness increases
Solution Approach 1:
The patent merges the touch panel structure with the LCD panel structure by integrating the touch electrode into the common electrode layer of the LCD panel. This combination eliminates the need for separate touch panel layers, reducing the total number of base substrates from four to three while maintaining both display and touch-control functions in a unified structure.
Solution Approach 2:
The common electrode layer of the LCD panel serves dual purposes: it functions as both the common electrode for the liquid crystal display and as the touch electrode for the capacitive touch panel. This multi-functionality approach allows a single layer to perform multiple roles, simplifying the overall structure and reducing the number of required components.
2Adaptability or versatility
If a touch panel is directly disposed on a TN mode LCD panel with each comprising two layers of base substrates, then touch-control function is achieved, but product thickness becomes larger
Solution Approach 1:
The patent merges the touch panel structure with the LCD panel structure by integrating the touch electrode into the common electrode layer of the LCD panel. This combination eliminates the need for separate touch panel layers, reducing the total number of base substrates from four to three while maintaining both display and touch-control functions in a unified structure.
3Adaptability or versatility
If multiple layers of base substrates are attached together to achieve touch-control function, then touch functionality is maintained, but manufacturing cost increases
Solution Approach 1:
The patent merges the touch panel structure with the LCD panel structure by integrating the touch electrode into the common electrode layer of the LCD panel. This combination eliminates the need for separate touch panel layers, reducing the total number of base substrates from four to three while maintaining both display and touch-control functions in a unified structure.
Solution Approach 2:
The common electrode layer of the LCD panel serves dual purposes: it functions as both the common electrode for the liquid crystal display and as the touch electrode for the capacitive touch panel. This multi-functionality approach allows a single layer to perform multiple roles, simplifying the overall structure and reducing the number of required components.
4Device complexity
If touch electrode and signal lines are positioned closer together, then wiring is simplified, but touch sensitivity decreases
Solution Approach 1:
The patent utilizes the third dimension (vertical spacing between substrates) to resolve the conflict between wiring simplicity and touch sensitivity. By positioning the touch electrode on one substrate and signal lines on another substrate with sufficient vertical distance, the design achieves both simplified wiring layout and maintained touch sensitivity, as the electric field interference is reduced through the spatial separation.
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 simplifies the structure, reduces product thickness, lowers manufacturing costs, and improves touch sensitivity by eliminating the need for additional layers and wirings, while maintaining touch functionality without an additional touch panel.
Implementation Method 1
the conductive structure is formed as a conductive pillar comprising an anisotropy conductive material
Data Source
AI summary
A touch display panel and a touch display device are disclosed to solve the problems that twisted nematic (TN) mode LCD panel in the known technology usually has complex structure, larger thickness and higher manufacturing costs. The touch display panel includes a first substrate (1) and a second substrate (2) disposed in opposite to each other, wherein a surface of the first substrate (1) facing the second substrate (2) is provided with a touch electrode (3), a surface of the second substrate (2) facing the first substrate (1) is provided with a touch line (4), and a conductive structure (5) is disposed between the first substrate (1) and the second substrate (2); wherein the touch electrode (3) is electrically connected with the touch line (4) through the conductive structure (5).