Array Substrate with Integrated Semiconductor Pressure Sensing Units
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Solution Overview
Problem
The integration of touch pressure sensors in display panels results in a complex structure, making it difficult for mass production and affecting the display effect, especially in liquid crystal display panels.
Innovation Solution
An array substrate with semiconductor pressure sensing units integrated in the same layer as the active layer of thin film transistors, connected through connection wires to form a Wheatstone bridge structure, simplifying the structure and facilitating mass production while minimizing interference with the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch pressure sensors are integrated into display panels, then the application scope of touch display technology is enlarged, but the structure becomes complicated
Solution Approach 1:
The patent merges the pressure sensing function with the existing TFT array substrate by forming semiconductor pressure sensing units in the same layer as the active layer. This integration eliminates the need for separate pressure sensor modules and their associated complex structures, while still enabling pressure detection capability.
Solution Approach 2:
The active layer of the TFT is designed to serve dual purposes: as the switching element for display control and as the pressure sensing element. This multi-functional design allows the same structural layer to perform both display and pressure detection functions, simplifying the overall device structure.
2Reliability
If electrodes are arranged at both sides of the touch substrate and perforations are arranged in the touch panel to compensate temperature drift, then temperature drift compensation is achieved, but the structure becomes complicated
Solution Approach 1:
The patent implements temperature drift compensation through the inherent properties of the semiconductor pressure sensing units and their Wheatstone bridge configuration. The system self-compensates for temperature variations without requiring external electrodes or perforations, as the bridge structure naturally balances temperature-induced resistance changes.
Solution Approach 2:
The patent replaces the mechanical/structural approach of adding electrodes and perforations with an electrical approach using the Wheatstone bridge circuit. The temperature compensation is achieved through electrical signal processing rather than physical structural modifications.
3Productivity
If semiconductor pressure sensing units are integrated with the active layer in the same plane, then mass production is facilitated, but the display region area is reduced
Solution Approach 1:
The patent resolves the area conflict by utilizing the vertical dimension and layer structure. The pressure sensing units are formed in the same layer as the active layer, but this integration is achieved through precise patterning and material deposition processes that allow both functions to coexist in the same planar space without significant area loss.
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 configuration allows for efficient detection of touch pressure magnitude without complicating the panel structure, enhancing the usability and display quality of touch-enabled display panels.
Implementation Method 1
semiconductor pressure sensing units... for detecting magnitude of the touch pressure applied by the user
Implementation Method 2
connection wires thereon, for connecting the semiconductor pressure sensing units to form at least one Wheatstone bridge structure
Data Source
AI summary
The present disclosure provides an array substrate and a display panel. The array substrate includes: a substrate; a plurality of scan lines formed on the substrate and extending along a first direction, a plurality of data lines formed on the substrate and extending along a second direction; a plurality of pixel units are defined by the scan lines and data lines, at least four semiconductor pressure sensing units formed on the substrate. In each of the plurality of the pixel units, a thin film transistor is provided. The substrate is further provided with a plurality of connection wires thereon, for connecting the semiconductor pressure sensing units to form at least one Wheatstone bridge structure. Using the array substrate provided in the present disclosure can the defect in the related art that the structure is complicated when the touch pressure sensor is integrated.