Array Substrate Touch Circuit Area Reduction
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Solution Overview
Problem
Current self-capacitance touch displays have complex touch structures and large occupied areas, making them unsuitable for thinner and lighter display devices due to complicated wiring and separate fabrication processes for touch and display components.
Innovation Solution
An array substrate with a touch circuit comprising switching units and touch electrodes arranged in an array, where each touch electrode is electrically connected to a touch detecting terminal through switching units, allowing for simplified detection and reduced area occupation by multiplexing touch and display functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If self-capacitance touch display structure is used, then touch detection function is achieved, but device complexity and occupied area increase
Solution Approach 1:
The patent merges the touch electrode with the common electrode of the liquid crystal display, making them a single integrated structure. This eliminates the need for separate touch and display electrode layers, thereby reducing device complexity while maintaining both display and touch detection functions
Solution Approach 2:
The common electrode serves dual purposes: it functions as both the common electrode for liquid crystal display operation and as the touch electrode for capacitive touch detection. This multi-functionality reduces the number of components and simplifies the overall device structure
2Reliability
If separate fabrication processes for touch and display components are used, then functional performance is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent combines touch electrode fabrication with display electrode fabrication into a single manufacturing process. The touch electrode and common electrode are formed simultaneously using the same ITO layer deposition and patterning processes, eliminating the need for separate fabrication lines and reducing manufacturing complexity
3Measurement precision
If complex wiring is used for touch electrodes, then touch detection accuracy is improved, but occupied area increases
Solution Approach 1:
The common electrode wiring serves dual purposes: it provides electrical connections for liquid crystal display operation and simultaneously serves as the touch electrode for capacitive sensing. This eliminates the need for separate touch electrode wiring, reducing occupied area while maintaining touch detection capability through the display's existing electrode network
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 enables a compact, simplified touch structure that reduces area occupation and fabrication complexity, facilitating the development of thinner and lighter display devices while maintaining effective touch detection capabilities.
Implementation Method 1
each touch electrode TP is electrically connected to one touch detecting terminal T through at least one first switching unit K
Data Source
AI summary
An array substrate, a display panel, and a display device are provided. The array substrate comprises a touch circuit including a plurality of first switching units, a controlling unit, and a plurality of touch detecting terminals, and a plurality of independent touch electrodes arranged in an array. The touch electrode is electrically connected to the touch detecting terminal through at least one first switching unit. When the array substrate is in a touch detecting stage, the controlling unit controls the first switching units to be turned on, such that the touch electrodes are progressively detected.