Touch Sensor Mesh Layout for Uniform Color Display Viewing
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Solution Overview
Problem
Existing display devices face challenges in achieving improved display quality and touch sensing quality with high resolution, particularly in reducing light blocking differences across viewing angles for different colors.
Innovation Solution
The display device incorporates a specific arrangement of unit pixels with alternating light emitting areas of different colors and a conductive layer with mesh openings, allowing for improved light emission and touch sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sensor conductive layer is used, then touch sensing function is provided, but light blocking differences across viewing angles occur
Solution Approach 1:
The sensor conductive layer is divided into multiple segments corresponding to different color regions (red, green, blue sub-pixels). Each segment has optimized conductivity characteristics tailored to its specific color region, allowing differential compensation of viewing angle dependencies for different colors while maintaining touch sensing functionality.
Solution Approach 2:
Different regions of the sensor conductive layer are assigned different conductivity characteristics. Specifically, the conductivity in each color region (red, green, blue) is independently optimized to compensate for the specific viewing angle dependency of that color, creating local quality variations that address the global light blocking issue.
2Measurement precision
If sensor conductive layer conductivity is increased to improve touch sensing, then sensing accuracy improves, but light blocking increases
Solution Approach 1:
The conductivity of the sensor conductive layer is optimized locally for each color region rather than using a uniform high conductivity throughout. This allows each region to have just enough conductivity for accurate touch sensing while minimizing light blocking, as each region's conductivity is tailored to its specific requirements.
Solution Approach 2:
The sensor conductive layer is segmented into multiple regions with different conductivity characteristics. This segmentation allows the system to achieve adequate touch sensing accuracy through distributed conductivity rather than requiring uniformly high conductivity, thereby reducing overall light blocking while maintaining sensing precision.
Data Source
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Figure 3A~3B
AI summary
A display device includes a display panel including a plurality of unit pixels and an input sensor. The input sensor includes a first sensor conductive layer, a first sensor insulating layer, and a second sensor conductive layer. At least one of the first and second sensor conductive layers is provided with a mesh opening defined therethrough, each of the unit pixels includes first, second, and third light emitting areas respectively emitting first, second, and third color lights, the first light emitting area of the first unit pixel and the second light emitting area of the second unit pixel are alternately arranged with each other in a first direction, and the second light emitting area of the first unit pixel and the first light emitting area of the second unit pixel are alternately arranged with each other in the first direction.