Display device and electronic device including the same
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Solution Overview
Problem
Existing display devices face issues with reflections from side surfaces of sensing electrodes causing visibility degradation due to reflection patterns, which affect the overall visibility of the display.
Innovation Solution
The display device incorporates a sensing electrode design with mesh lines that intersect at points and include cut points and compensation patterns, such as through-hole patterns, to prevent overlap with pixel emission areas and minimize reflection, ensuring the sensing electrodes do not obstruct light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing electrodes are added to detect touch input, then touch sensing capability is improved, but reflection from side surfaces causes visibility degradation
Solution Approach 1:
The sensing electrode is segmented into multiple mesh lines extending in different directions, with cut points dividing the mesh lines into sections. This segmentation allows the electrode to maintain electrical connectivity while reducing the continuous side surface area that causes reflections, thereby improving visibility without compromising touch sensing capability.
Solution Approach 2:
Compensation patterns with through-hole structures are introduced at specific locations where mesh lines are continuous. These local modifications create non-reflective zones by breaking the side surface continuity at strategic points, reducing overall reflection while preserving the sensing function of the electrode.
2Reliability
If mesh lines are made continuous for electrical connectivity, then electrode functionality is improved, but side surface reflections increase
Solution Approach 1:
The mesh lines are designed with different properties in different sections: continuous portions maintain electrical connectivity and functionality, while portions with cut points or compensation patterns reduce reflection. This local differentiation allows the electrode to simultaneously achieve both functional and optical performance.
Solution Approach 2:
Compensation patterns act as intermediary structures between the mesh lines and the external environment. These patterns include through-hole configurations that serve as mediators to break the reflective surface continuity while maintaining the underlying electrical connectivity of the sensing electrode.
Data Source
AI summary
A display device includes a panel layer including pixels disposed in a display area, and an input sensing layer disposed on the panel layer. The input sensing layer includes a sensing electrode including mesh lines defining mesh openings corresponding to the pixels. The mesh lines include first mesh lines extending in a first direction and second mesh lines extending in a second direction. The first mesh lines and the second mesh lines intersect each other at intersection points. In some of the mesh lines, a cut point is defined between two adjacent intersection points. In a mesh line in which the cut point is not defined between two adjacent intersection points among the mesh lines, a compensation pattern protruding from side surfaces of the mesh line is defined. The compensation pattern includes a through-hole pattern positioned at a central portion of the compensation pattern.