Input Sensor Mesh Layout for Higher Light Output in Displays
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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 display's performance.
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 that are integrated with the mesh lines, reducing interference and enhancing light output efficiency and external visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive layer is added to the input sensor, then the sensing function is improved, but the light output efficiency and external visibility deteriorate due to interference with light extraction
Solution Approach 1:
The conductive layer is segmented into mesh lines with protruding portions that extend into the opening regions. This segmentation allows the conductive layer to maintain its sensing function while reducing continuous coverage that would block light, thereby improving light output efficiency without sacrificing sensing reliability
Solution Approach 2:
The mesh lines have varying local qualities through protruding portions of different sizes and positions. The protruding portions are strategically placed to provide adequate sensing coverage in critical areas while minimizing light blocking, creating local variations in conductive density that balance sensing performance and optical performance
2Measurement precision
If the conductive layer coverage is increased to improve sensing accuracy, then the sensing precision is improved, but the external light reflection and visibility of patterns worsen
Solution Approach 1:
The conductive layer is divided into discrete mesh lines with protruding portions rather than continuous coverage. This segmentation reduces the total surface area that can reflect external light while maintaining sensing accuracy through strategic placement of conductive elements
Solution Approach 2:
The mesh lines feature asymmetric protruding portions that extend into opening regions on one side but not uniformly across all areas. This asymmetric design allows optimized sensing in specific directions while minimizing light reflection effects that would occur with symmetric uniform coverage
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.