Peripheral Electrode Segmentation for Wearable Display Touch Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable display devices face challenges in achieving both high display quality and excellent touch operability due to the risk of electrical connections between touch sensors and other components during manufacturing, leading to potential short circuits and reduced touch detection accuracy.
Innovation Solution
The display device incorporates detection electrodes with fine line portions in a mesh or zigzag shape in the peripheral area, reducing the risk of electrical connections with shield electrodes via conductive pearls in the sealant, thereby minimizing capacitance and time constant, and enhancing touch detection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If touch sensors are arranged around the display area, then touch operability is improved, but the risk of electrical connection between touch sensors and other components increases
Solution Approach 1:
The detection electrode is divided into multiple fine line portions arranged in a mesh or zigzag pattern. This segmentation reduces the overall electrode area in the peripheral region where conductive pearls are present, thereby minimizing the risk of electrical connection while maintaining touch sensor functionality around the display area.
Solution Approach 2:
The detection electrode has different configurations in different regions: fine line portions are used in the peripheral area where conductive pearls are located to reduce electrical connection risk, while the display area maintains standard electrode patterns for optimal display quality. This local differentiation resolves the contradiction between touch operability and electrical reliability.
2Reliability
If fine line portions are used in the peripheral area, then capacitance and time constant are minimized, but manufacturing complexity increases
Solution Approach 1:
The detection electrode is segmented into fine line portions in the peripheral area, which minimizes capacitance and time constant. Although this increases pattern complexity, the segmented structure can be efficiently manufactured using standard photolithography and etching processes, balancing reliability improvement with manufacturing feasibility.
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 configuration reduces the risk of short circuits and improves touch detection accuracy by minimizing capacitance and time constant, allowing for more precise and reliable touch operations while maintaining display quality.
Implementation Method 1
a conductive member (for example, a conductive pearl) is embedded in the sealant 30 to electrically connect the first electrode 100 and the second electrode 200
Implementation Method 2
at least one of the first electrode 100 and the second electrode 200 includes a plurality of fine line portions in an area where the first electrode 100, the insulating film 20, the sealant 30, and the second electrode 200 are overlapped in planar view
Data Source
AI summary
According to one embodiment, a display device includes a first substrate, a second substrate, a sealant, a first electrode, an insulating film and a second electrode. The sealant bonds the first substrate and the second substrate and is provided in a peripheral area surrounding a display area. The first electrode is provided on the first substrate in the peripheral area. The insulating film covers the first electrode. The second electrode is provided on the second substrate in the peripheral area. The sealant contains a conductive member. At least one of the first electrode and the second electrode includes a plurality of fine line portions in an area where the first electrode, the insulating film, the sealant, and the second electrode are overlapped in planar view.