Touch-Integrated Common Lines for Display Panel Manufacturing
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Solution Overview
Problem
Conventional touch-controlled display panels face challenges of low manufacture efficiency and high costs due to the need for photolithography and unique photomasks in in-cell touchscreen technology, which affects existing electrode deposits and increases production complexity.
Innovation Solution
The integration of common lines with touch-controlled driving and sensing lines on the array substrate, eliminating the need for separate photomasks and improving manufacturing efficiency by using a thin-film transistor to connect pixel electrodes with scan and data signals, while maintaining display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If photolithography is performed on a conventional display screen by using a photomask to dispose additional driving electrode lines and sensing electrode lines on a substrate, then touch-controlled function can be achieved, but manufacture efficiency is low and manufacture cost is high
Solution Approach 1:
The patent merges the common electrode lines with the touch-controlled driving and sensing lines by disposing them at the same locations and using the same photomask patterns. This integration eliminates the need for separate photolithography processes and unique photomasks for touch-controlled functions, thereby significantly improving manufacture efficiency while maintaining touch-controlled capability
Solution Approach 2:
The common electrode lines are designed to serve dual purposes: as common lines for display functions and as touch-controlled driving/sensing lines. By making these lines universal, the patent eliminates the need for separate dedicated lines for touch-controlled functions, reducing manufacturing complexity and cost
2Adaptability or versatility
If photolithography is performed on a conventional display screen by using a photomask to dispose additional driving electrode lines and sensing electrode lines on a substrate, then touch-controlled function can be achieved, but the photolithography affects other deposits (e.g., electrode layer) on the existing substrate
Solution Approach 1:
By combining the common lines and touch-controlled lines into a single integrated structure with unified photomask patterns, the patent eliminates repeated photolithography processes that would otherwise damage existing electrode layers. The lines are disposed at the same locations with the same patterns, avoiding additional exposure and deposition steps that could compromise layer integrity
3Adaptability or versatility
If a unique photomask is fabricated for manufacturing the driving electrode lines and sensing electrode line, then touch-controlled function can be achieved, but manufacture cost increases
Solution Approach 1:
The patent makes the common electrode lines universal by designing them to perform both display functions and touch-controlled functions simultaneously. This universality eliminates the need for unique photomasks dedicated to touch-controlled lines, as the same photomask patterns used for common lines also define the touch-controlled driving and sensing lines, thereby reducing manufacturing cost
Data Source
AI summary
The present invention provides a touch-controlled display panel, which comprises an array substrate, a color filter substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate. The array substrate comprises a scan line, a data line, a pixel electrode, a first touch-controlled driving line, and a touch-controlled sensing line. The present invention further provides a touch-controlled display device. The present invention integrates the common line with the touch-controlled driving line and the touch-controlled sensing line, thereby improving the efficiency in manufacturing the touch-controlled display panel and reducing the manufacture cost thereof.