Display Panel Mesh Sensor Protrusions for Light Extraction
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Solution Overview
Problem
The conductive layer of the input sensor in display devices affects light output efficiency and external light reflection, impacting the external visibility of specific patterns depending on the direction of light extraction.
Innovation Solution
A display device with a display panel featuring light-emitting regions and an input sensor, where the input sensor includes mesh lines with protruding portions and cut portions, and is layered with insulating and conductive layers, optimizing the arrangement of these elements to minimize interference with light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive layer of the input sensor is disposed on the display panel, then touch sensing capability is achieved, but light output efficiency and external visibility are degraded
Solution Approach 1:
The conductive layer is segmented into mesh lines with periodic patterns, creating opening regions that allow light to pass through. This segmentation reduces the total area of conductive material while maintaining electrical connectivity for touch sensing, thereby improving light output efficiency without sacrificing sensing capability
Solution Approach 2:
Protruding portions are added at specific locations where mesh lines are spaced farther apart. These localized protrusions create corresponding depressions in the display panel, forming a complementary structure that optimizes light extraction at critical locations while maintaining overall sensor functionality
2Reliability
If the conductive layer of the input sensor is disposed on the display panel, then touch sensing capability is achieved, but external light reflection and pattern visibility are affected
Solution Approach 1:
The mesh line pattern segments the conductive layer into discrete lines with spacing between them. This segmentation reduces continuous light reflection surfaces and allows external light to pass through opening regions, minimizing glare and improving external visibility while preserving touch sensing through the remaining conductive pathways
Solution Approach 2:
Protruding portions extend the mesh lines into the third dimension (vertical direction), creating a relief structure. This dimensional change allows light to be extracted from below the protrusions, reducing surface reflection and improving external visibility without affecting the planar conductive pathways for touch sensing
Data Source
AI summary
A display device includes a display panel including light-emitting regions and an input sensor disposed on the display panel and including sensing patterns. The sensing patterns include mesh lines defining opening regions respectively overlapping the light-emitting regions and protruding portions having a shape protruding from at least one of the mesh lines into the opening regions. The protruding portions include a first protruding portion disposed between light-emitting regions spaced apart from each other by a first distance in a first direction and a second protruding portion which is disposed between light-emitting regions spaced apart from each other by a second distance smaller than the first distance in the first direction and has a smaller area than the first protruding portion in a plan view, thereby exhibiting excellent display quality and viewing angle characteristics.