Color Filter Substrate With Concave Touch Electrode
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Solution Overview
Problem
In-cell touch screens face reduced signal-noise ratio (SNR) and compromised touch accuracy and sensitivity due to integrated touch driving and sensing electrodes within the array substrate or color filter substrate.
Innovation Solution
A color filter substrate design featuring a base substrate with a color filter layer and a touch electrode that covers concave portions on its surface, increasing the surface area of the touch electrode to enhance charge accumulation and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the touch electrode is integrated within the array substrate or color filter substrate to achieve in-cell touch screen, then the thickness and weight are reduced, but the signal-noise ratio is reduced and touch accuracy and sensitivity are compromised
Solution Approach 1:
The patent introduces a three-dimensional concave structure on the surface of the color filter layer, transforming the touch electrode from a flat two-dimensional configuration to a three-dimensional morphology. This dimensional change increases the effective surface area of the touch electrode without increasing the overall footprint, thereby improving charge accumulation and touch sensitivity while maintaining the in-cell integration benefits.
2Weight of stationary object
If the touch electrode is integrated within the array substrate or color filter substrate to achieve in-cell touch screen, then the thickness and weight are reduced, but the signal-noise ratio is reduced and touch accuracy and sensitivity are compromised
Solution Approach 1:
The patent introduces a three-dimensional concave structure on the surface of the color filter layer, transforming the touch electrode from a flat two-dimensional configuration to a three-dimensional morphology. This dimensional change increases the effective surface area of the touch electrode without increasing the overall footprint, thereby improving charge accumulation and touch sensitivity while maintaining the in-cell integration benefits.
3Device complexity
If the touch electrode is integrated within the array substrate or color filter substrate to achieve in-cell touch screen, then the lamination rate is improved, but the signal-noise ratio is reduced and touch accuracy and sensitivity are compromised
Solution Approach 1:
The patent introduces a three-dimensional concave structure on the surface of the color filter layer, transforming the touch electrode from a flat two-dimensional configuration to a three-dimensional morphology. This dimensional change increases the effective surface area of the touch electrode without increasing the overall footprint, thereby improving charge accumulation and touch sensitivity while maintaining the in-cell integration benefits.
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 increased surface area of the touch electrode significantly improves touch sensitivity and accuracy in in-cell touch screens.
Implementation Method 1
the touch electrode covers surfaces of the plurality of the first concave portions... increasing the surface area of the touch electrode to enhance charge accumulation and sensitivity
Data Source
AI summary
A color filter substrate and a display device are provided, and the color filter substrate comprises a base substrate; a color filter layer, disposed on the base substrate and comprising a plurality of sub-pixels; and a touch electrode, disposed on a side of the color filter layer away from the base substrate. A plurality of first concave portions are disposed in the color filter layer on the side away from the base substrate, and the touch electrode covers surfaces of the plurality of the first concave portions.