Color Filter Array Touch Sensor Crack Resistance
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Solution Overview
Problem
Conventional in-cell touch technology for display panels, which includes touch-sensing lines in multiple directions, tends to generate cracks when applied to bending-type or folding-type devices, increasing thickness and reducing image visibility.
Innovation Solution
A color filter array with a touch sensor featuring a touch-sensing line disposed in only one direction, connected to a touch block electrode and black matrix, reduces crack generation and simplifies manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch-sensing lines are disposed in multiple directions (first and second directions), then touch sensing capability is improved, but crack generation increases in bending or folding areas
Solution Approach 1:
The patent extracts the touch-sensing line from the multi-directional configuration and retains only the essential directional component. Specifically, the touch-sensing line is disposed in only one direction (either first or second direction) rather than both directions, thereby maintaining basic touch sensing capability while eliminating the structural complexity that causes cracks in bending or folding areas.
2Reliability
If a conventional in-cell touch structure is adopted, then touch sensor functionality is achieved, but display panel thickness increases
Solution Approach 1:
The patent merges the touch sensor structure with the color filter array structure. The touch-sensing line is integrated into the color filter array layer, and the black matrix serves dual purposes as both a light shielding layer and an insulating layer for the touch electrode. This merging eliminates the need for separate touch sensor layers, thereby achieving touch sensor functionality without increasing display panel thickness.
3Measurement precision
If multiple touch-sensing lines in different directions are used, then comprehensive touch detection is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts only the necessary touch-sensing line configuration from the complex multi-directional network. By disposing the touch-sensing line in a single direction and using the black matrix as an insulating layer, the manufacturing process is simplified while maintaining adequate touch detection accuracy through the integrated structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution minimizes crack formation in touch-sensing lines of bending-type or folding-type display devices, enhancing product design freedom and reliability while reducing manufacturing complexity and costs.
Implementation Method 1
the capacitance between the first and second touch-sensing lines is changed at the touched position, and the touch position of user is sensed by sensing the position at which the capacitance is changed
Data Source
AI summary
Disclosed are a color filter array having a touch sensor and a display panel having the same. The color filter array may comprise: a plurality of color filters arranged in first and second directions on a substrate; a touch block electrode disposed on the color filters to sense a user touch position; a black matrix disposed on the touch block electrode between the color filters; and a touch-sensing line which is disposed in any one of the first and second directions and at least one of which is connected to the touch block electrode. Thereby, when the color filter array is applied to a bending-type or folding-type display device, generation of cracks in the touch sensing line is reduced or minimized.