Touch Panel Layout for Curved Edges and Open-Area Sensing
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Solution Overview
Problem
Existing touch display technologies face challenges in applying the layout structure of touch sensors and touch lines to variously shaped display devices, leading to non-uniform touch sensing sensitivity and difficulties in designing touch sensors and touch lines for devices with open areas.
Innovation Solution
The touch sensors and touch lines are designed to conform to the shape of the active area of the touch display panel, including curved edges and open areas, by using a mesh-type touch sensor structure and adjusting the shape and position of touch sensors and touch lines to maintain consistent touch sensing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional layout structure of touch sensors and touch lines is used, then the design is simple and manufacturing is easy, but it cannot be applied to variously shaped display devices and results in non-uniform touch sensing sensitivity
Solution Approach 1:
The touch sensor array is divided into multiple regions (first region, second region, third region) with different electrode configurations. Each region is segmented to handle specific geometric requirements, allowing the overall system to adapt to complex display shapes while maintaining manageable design complexity through modular regional design
Solution Approach 2:
Different regions of the touch sensor array are assigned different electrode densities and configurations tailored to local geometric requirements. The first region has higher electrode density for straight edges, while the second region has adjusted density for curved edges, ensuring uniform touch sensitivity across various shapes without requiring complete redesign of the entire sensor array
2Adaptability or versatility
If touch sensors and touch lines are designed for variously shaped display devices, then adaptability to different shapes is improved, but manufacturing precision requirements increase
Solution Approach 1:
The touch sensor array and touch lines are pre-configured with predetermined electrode densities and configurations during the design phase to match expected display geometries. This preliminary design approach allows for standardized manufacturing processes that can accommodate various shapes without requiring high-precision custom positioning for each device variant
Solution Approach 2:
The electrode density and configuration parameters are adjusted according to the specific display shape requirements. By changing these parameters within a standardized design framework, the system achieves adaptability to various shapes while maintaining consistent manufacturing precision requirements across different device configurations
3Measurement precision
If the touch sensor layout is adjusted for curved edges and open areas, then touch sensing sensitivity uniformity is improved, but the device complexity increases
Solution Approach 1:
The touch sensor array employs dynamically adjustable electrode activation patterns that adapt to the detected display geometry. For curved edges, the system activates electrodes in patterns that compensate for the curvature effect, while for open areas, it adjusts the active electrode regions. This dynamic adaptation maintains uniform touch sensing sensitivity without requiring permanent complex physical structures
Solution Approach 2:
A single touch sensor array design serves multiple functions by implementing different electrode configurations for different display geometries. The same physical sensor structure can be programmed to handle straight edges, curved edges, and open areas, reducing the need for multiple specialized designs while maintaining high measurement precision across all scenarios
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 approach allows for effective touch sensing on display devices with various shapes, including non-quadrangular shapes and those with open areas, while maintaining uniform touch sensing sensitivity across different positions on the display panel.
Implementation Method 1
a change in a capacitance caused by the user's touch on the display panel is sensed to detect the presence or absence of the user's touch on the display panel and a touched position
Data Source
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AI summary
The present embodiments generally relate to a display panel and a display device which may recognize touch. A display panel is provided in which a touch sensor and a touch line are disposed in an active area in which a part of an outer edge of the touch line is curved to correspond to a curved shape of the active area in the display panel so that the touch sensing is allowed in display panels having various shapes. Further, a touch display device is provided in which an open area is located between two adjacent touch lines disposed on the display panel so that touch sensing is allowed also in the display panel including an open area such as a hole or a notch.