Display Mesh Sensing Electrodes for Light Efficiency and Visibility
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Solution Overview
Problem
The conductor in the input sensing layer of display devices affects the light output efficiency and external light reflectance, leading to reduced visibility.
Innovation Solution
A display device with a mesh patterned input sensing layer is designed, where the mesh pattern overlaps light-emitting regions, ensuring that the conductor is positioned to minimize interference with light emission and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductor is disposed on the display panel to sense external input, then input sensing capability is improved, but light output efficiency and external light reflectance deteriorate
Solution Approach 1:
The conductor is divided into a mesh pattern with multiple openings, segments that can be selectively positioned to overlap light-emitting regions. This segmentation allows the conductor to maintain sensing capability while reducing continuous coverage that would block light or reflect external light, thus resolving the contradiction between input sensing and light output efficiency
Solution Approach 2:
The mesh pattern is designed with varying overlap characteristics - portions overlap light-emitting regions while other portions do not. This local differentiation allows the conductor to provide sensing coverage where needed while minimizing interference with light emission and reflection in critical areas, balancing input sensing capability with illumination performance
2Reliability
If a conductor is disposed on the display panel to sense external input, then input sensing capability is improved, but visibility deteriorates
Solution Approach 1:
The conductor is segmented into a mesh pattern with openings that reduce continuous visual obstruction. This segmentation minimizes the visual impact on display visibility while preserving the sensing function, as the discrete mesh segments allow light to pass through more effectively than a continuous conductor would
Solution Approach 2:
The mesh pattern acts as an intermediary structure between the conductor and the display content. By introducing this intermediate geometric configuration, the conductor's sensing function is maintained while its visual interference is reduced, as the mesh structure allows display light to pass through with minimal obstruction
Data Source
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AI summary
A display device includes a display panel and an input sensing layer. The display panel includes a plurality of light-emitting regions, a non-light-emitting region, a display element layer, and an encapsulation layer disposed on the display element layer. The input sensing layer includes a first insulating layer directly disposed on the encapsulation layer and a plurality of sensing electrodes disposed on the first insulating layer. Each of the plurality of sensing electrodes includes a mesh pattern in which a plurality of openings are defined. A portion of the mesh pattern overlaps a portion of each of the plurality of light-emitting regions on a plane.