LCD Touch Array Substrate Gate Line Integration
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Solution Overview
Problem
Existing liquid crystal display touch screens face challenges with high power consumption, increased process complexity, and reduced pixel opening ratio due to separate scanning and sensing circuits, which complicate manufacturing and affect product yield.
Innovation Solution
A liquid crystal display touch screen array substrate design that integrates a common electrode line with the gate line, utilizing a synchronous second-order driving signal and a photodiode-based light sensing unit, where the common electrode line serves as both the touch emission and sensing line, reducing line density and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate scanning addressing circuit (touch emission line and touch sensing line) is used to realize touch function, then touch positioning function is achieved, but pixel opening ratio decreases and process difficulty increases
Solution Approach 1:
The patent combines the touch emission line with the gate line used for display scanning, making them share the same physical structure and signal transmission path. This merging eliminates the need for separate touch emission lines, thereby reducing process complexity while maintaining touch positioning functionality
Solution Approach 2:
The gate line is designed to serve dual functions: it acts as both the display scanning line and the touch emission line. By making the gate line universal for both display and touch functions, the patent reduces the number of separate circuits needed, simplifying the overall structure and manufacturing process
2Ease of operation
If independent touch emission line is used, then touch function is achieved, but power consumption increases
Solution Approach 1:
By merging the touch emission line function into the gate line, the patent eliminates the need for independent touch emission line driving circuits. The gate line's existing driving circuitry is utilized for both display and touch functions, thereby reducing overall power consumption
Solution Approach 2:
The gate line serves as a universal conductor for both display scanning signals and touch emission signals. This multi-functionality reduces the number of active circuits required, leading to lower power consumption while maintaining full touch functionality
3Ease of operation
If touch emission line and touch sensing line intersect with gate line and data line, then touch positioning is achieved, but pixel opening ratio decreases
Solution Approach 1:
The patent merges the touch emission line with the gate line, eliminating the need for separate touch emission lines that would intersect with pixel structures. This reduces the number of conductive lines passing through pixels, thereby increasing the opening ratio while maintaining touch positioning capability
Solution Approach 2:
By making the gate line universal for both display and touch emission functions, the patent eliminates redundant conductive paths through the pixel area. This reduces line density and increases the opening ratio while preserving full touch functionality through the gate line's dual role
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
This design enhances pixel opening ratio, simplifies the manufacturing process, reduces power consumption, and improves touch sensitivity while eliminating parasitic capacitance effects on image quality.
Implementation Method 1
a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line
Data Source
AI summary
The present invention discloses a liquid crystal display touch screen array substrate, which comprises multiple pixel units defined by a gate line and a data line, each pixel unit is provided with a thin film transistor and a pixel electrode inside; a common electrode line provided in parallel at the side of each said gate line; which further comprise: a touch circuit unit used for touch positioning, the touch circuit unit comprising a touch emission line and a touch sensing line intersecting each other, and a light sensing unit provided at the intersection and respectively connected to the touch emission line and the touch sensing line. The touch emission line is the common electrode line, and the touch sensing line is parallel with the data line. The embodiment of the present invention correspondingly discloses a liquid crystal display touch screen. According to the embodiment of the present invention, it can enhance the sensitivity of the touch position, reduce the power consumption of the touch display screen, and improve the product yield.