Conductive Wire Touch Detection in Display Devices
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Solution Overview
Problem
Existing liquid crystal display panels face challenges in increasing screen size or achieving high definition due to the restriction on wire arrangement, especially when used for touch detection, and do not utilize conductive layers as wires for gate or data lines.
Innovation Solution
A display device configuration that includes a plurality of first electrodes, a second electrode, switching elements, a gate line, a data line, and a conductive wire opposed to the second electrode via an insulating layer, which is coupled to the switching elements, allowing for improved wire arrangement and touch detection functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large number of wires such as gate line and data line are arranged in the display region to increase screen size or achieve high definition, then the display resolution and screen size are improved, but the restriction on wire arrangement increases making the structure more complex
Solution Approach 1:
The conductive layer is designed to serve multiple functions: it acts as both a wire (gate line or data line) for signal transmission and as an electrode for touch detection. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall wire arrangement while maintaining high display resolution and enabling touch functionality.
Solution Approach 2:
The patent merges the function of wires (gate lines or data lines) with the function of touch detection electrodes by using the same conductive layer for both purposes. This combining of functions reduces the complexity of wire arrangement in the display region while achieving both high definition display and touch detection capabilities.
2Length of stationary object
If the conductive layer is used as wire such as gate line or data line, then the restriction on wire arrangement is reduced enabling larger screen sizes, but the electrical conductivity requirement becomes more critical
Solution Approach 1:
The conductive layer is formed using a composite structure of multiple conductive materials (first conductive material and second conductive material) with different properties. This composite approach allows optimization of both electrical conductivity and flexibility in wire arrangement, enabling larger screen sizes while maintaining reliable signal transmission.
Solution Approach 2:
The patent employs parameter changes by selecting conductive materials with different characteristics (such as transparency and conductivity) for different regions or functions. This allows the conductive layer to maintain high electrical conductivity where needed while providing flexibility in arrangement for larger screen sizes.
3Manufacturing precision
If switching elements and wires are arranged in the display region for high definition display, then the display quality is improved, but the area available for touch detection electrode arrangement is reduced
Solution Approach 1:
The conductive layer serving as both wire and touch detection electrode allows the same physical space to fulfill multiple functions. This eliminates the need for separate dedicated electrode areas, thereby maintaining large touch detection electrode area even when switching elements and wires are densely arranged for high definition display.
Solution Approach 2:
By merging the wire function and touch electrode function into a single conductive layer, the patent maximizes the utilization of available area in the display region. This combining approach ensures that both high definition display quality and adequate touch detection electrode area are achieved simultaneously.
Data Source
AI summary
A display device includes: a plurality of first electrodes arranged in a display region for displaying an image; a second electrode opposed to the first electrodes; a plurality of switching elements that are arranged in the display region and coupled to the first electrodes or the second electrode; a gate line for supplying a scanning signal for scanning the switching elements; a data line for supplying a signal to the switching elements that are coupled to the switching elements; and conductive wire that is opposed to the second electrode via an insulating layer and is coupled to the switching elements.