Color Filter Array Substrate with Integrated Touch Sensing
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Solution Overview
Problem
The existing liquid crystal display (LCD) devices with external touch screens increase the thickness of the liquid crystal display panel due to the added thickness of the touch screen, which is a disadvantage in terms of overall device thickness.
Innovation Solution
A color filter array substrate with integrated sensing lines, comprising first and second sensing electrodes and conductive black matrixes, is used to enable touch sensing capabilities while reducing the thickness of the liquid crystal display panel by integrating touch screen functionality directly into the LCD device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external-type touch screen is additionally attached to an upper surface of a complete liquid crystal display panel, then touch sensing capability is achieved, but the thickness of the liquid crystal display panel is increased
Solution Approach 1:
The patent merges the touch screen functionality with the color filter array substrate by integrating sensing electrodes and conductive black matrixes directly into the LCD panel structure. This combination eliminates the need for a separate external touch screen layer, thereby achieving touch sensing capability while avoiding the thickness increase that would result from adding an external touch screen.
Solution Approach 2:
The color filter array substrate is designed to serve multiple functions: it maintains its original color filtering role while simultaneously incorporating touch sensing capabilities through the integrated sensing electrodes and conductive black matrixes. This multi-functionality allows the single substrate to replace what would traditionally require separate components, including an external touch screen.
2Length of stationary object
If touch screen functionality is integrated into the color filter array substrate, then the thickness of the liquid crystal display panel is decreased, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process is divided into distinct sequential stages: first forming the conductive black matrixes, then defining pixel regions with non-conductive black matrix, followed by forming color filters, creating overcoat layers, and finally forming contact holes to expose the conductive black matrixes. This segmentation of the manufacturing process into manageable steps makes the integrated structure feasible to produce despite the increased complexity.
Data Source
AI summary
Discussed are a color filter array substrate with sensing lines capable of sensing a user's touch, and a method for manufacturing the color filter array substrate, wherein the color filter array substrate comprises a plurality of first sensing electrodes at fixed intervals on a substrate; a plurality of second sensing electrodes respectively interposed between each of the first sensing electrodes, wherein each second sensing electrode is provided at a predetermined interval from each first sensing electrode; and a plurality of conductive black matrixes respectively overlapped with the plurality of first sensing electrodes, wherein the plurality of conductive black matrixes are formed to electrically connect the neighboring first sensing electrodes provided with the second sensing electrode interposed in-between.