Display Device Mesh Electrodes for Visibility and Light Output
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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 that overlaps with light-emitting regions, featuring a mesh pattern with openings to minimize interference and enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductor is used in the input sensing layer to sense external input, then sensing function is improved, but light output efficiency and external light reflectance deteriorate
Solution Approach 1:
The conductor is divided into a mesh pattern consisting of multiple conductive lines arranged in a grid structure. This segmentation reduces the continuous coverage of the conductor, allowing more light to pass through the gaps between the lines while still maintaining sufficient conductive paths for sensing functionality.
Solution Approach 2:
The mesh pattern creates regions of varying conductor density across the input sensing layer. The conductive lines are strategically positioned to provide adequate sensing capability in specific areas while minimizing light blocking in other regions, optimizing the balance between sensing performance and optical properties.
2Reliability
If a conductor is used in the input sensing layer to sense external input, then sensing function is improved, but visibility deteriorates
Solution Approach 1:
The conductor is segmented into a mesh pattern with multiple openings, reducing the overall conductor area that blocks light and degrades visibility. The segmented structure maintains sensing capability through the distributed conductive network while minimizing visual interference.
Solution Approach 2:
The mesh pattern creates a porous structure with numerous openings throughout the conductor layer. This porous design allows light to pass through more effectively, improving visibility and front luminance while the conductive network within the porous structure continues to provide sensing functionality.
Data Source
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.