Touch LED Display Transmittance via Black Matrix and Spacer Positioning
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Solution Overview
Problem
Touch display devices face reduced transmittance due to exposed touch signal lines and spacers, which affect display quality and convenience.
Innovation Solution
Adjusting the locations of touch signal lines and spacers within the display device structure, such as overlapping touch signal lines with pixel units and positioning spacers between color filter units, to minimize exposure and maintain optimal transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch signal lines are disposed on the display device, then touch functionality is achieved, but transmittance decreases due to exposed signal lines
Solution Approach 1:
A black matrix layer is introduced as an intermediary element to cover the touch signal lines. This black matrix layer serves as a mediator that blocks the visibility of the signal lines while allowing the touch functionality to operate underneath, thus improving transmittance without sacrificing touch capability
Solution Approach 2:
The touch signal lines are routed in alternative paths and positioned in different spatial dimensions relative to the pixel units. By changing the dimensional arrangement and overlapping configuration, the signal lines are hidden within the pixel structure rather than being exposed on the surface, thereby improving transmittance while maintaining touch functionality
2Manufacturing precision
If spacers are added to maintain gap distance, then assembly alignment is improved, but transmittance decreases due to exposed spacers
Solution Approach 1:
The black matrix layer serves as an intermediary that covers the spacers, hiding them from view while allowing the spacers to perform their alignment function. This mediator approach maintains manufacturing precision without the visual distraction of exposed spacers
Solution Approach 2:
The visual presence of spacers is extracted from the display area by positioning them within regions covered by the black matrix layer. The spacers remain functional for alignment but are taken out of the visible light path, thereby improving transmittance while maintaining assembly precision
3Device complexity
If touch signal lines overlap with data lines, then routing complexity is reduced, but transmittance decreases when assembly shift occurs
Solution Approach 1:
The black matrix layer is designed in advance to cover potential exposure areas of the touch signal lines. This preliminary protective measure ensures that even if assembly shifts occur during manufacturing, the signal lines remain covered and transmittance is maintained
Solution Approach 2:
The overlapping arrangement of touch signal lines with pixel units is designed in a multi-dimensional space where the lines are positioned to overlap with non-active areas of pixels. This dimensional arrangement allows the lines to be hidden within the pixel structure while maintaining simple routing
Data Source
AI summary
A touch light emitting diode display device includes: a first substrate having a first surface; a touch signal line projected on the first surface as a touch region; and a first color unit and a second color unit. The first color unit and the second color unit are projected on the first surface as a first region and a second region respectively, wherein the first color unit and the second color unit are of different colors, and a portion of the touch region locates between the first region and the second region.