Color Filter-Integrated Touch Sensor Coplanar Substrate Design
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Solution Overview
Problem
Existing touch sensors integrated with color filters in thin film displays face issues such as increased thickness, weight, decreased brightness, and manufacturing costs, along with defects due to flatness degradation and residue from organic layers, which affect input sensing performance.
Innovation Solution
A color filter-integrated touch sensor is designed where the color filter and touch sensor are formed on opposite sides of a substrate, with specific peeling strengths and wire dimensions to enhance alignment precision and reduce defects, including a substrate with a first transparent electrode layer, metal electrode layer, insulation layer, and passivation layer, and a method of manufacturing that involves forming the color filter and touch sensor sequentially on the substrate surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the color filter, touch block electrode, black matrix, and touch sensing line are sequentially stacked on the substrate, then the touch sensor can be integrated with the color filter, but defects occur due to decrease in flatness
Solution Approach 1:
The patent transitions from sequential stacking in the vertical dimension to forming both the color filter and touch sensor patterns on the same substrate plane. The touch sensor electrodes and color filter electrodes are formed as coplanar patterns on the substrate, eliminating the flatness degradation caused by multiple sequential stacking steps.
2Adaptability or versatility
If the black matrix is formed on the touch block electrode and the touch sensing line is stacked thereon, then the touch sensor structure is completed, but residues from the organic layer appear affecting input sensing performance
Solution Approach 1:
The patent extracts and eliminates the organic layer (black matrix) from the touch sensor electrode structure. By forming the touch sensor electrodes directly on the substrate without the organic layer, residues that would affect sensing performance are prevented from occurring.
3Adaptability or versatility
If a capacitive touch sensor panel is overlaid on an LCD or OLED, then touch input functionality is achieved, but thickness and weight increase
Solution Approach 1:
The patent merges the color filter layer and touch sensor layer into a single integrated structure on one substrate. This consolidation eliminates the need for a separate touch sensor panel overlay, thereby reducing the overall weight and thickness of the display device.
4Adaptability or versatility
If a capacitive touch sensor panel is overlaid on an LCD or OLED, then touch input functionality is achieved, but brightness decreases
Solution Approach 1:
The patent combines the color filter and touch sensor into a single integrated layer, eliminating the additional overlay panel that would block light. This integration maintains higher brightness by reducing the number of layers that light must pass through.
Data Source
AI summary
A color filter-integrated touch sensor is disclosed. The color-filter-integrated touch sensor includes a color filter disposed on a first surface side of a substrate and a touch sensor disposed on a second surface side of the substrate. A manufacturing method thereof is disclosed.