Integrated Touch Electrodes and Coils in Array Substrates
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Solution Overview
Problem
Existing touch display devices have large thickness due to separate arrangement of touch panels and display devices, limiting their application range.
Innovation Solution
An array substrate integrating independent touch-control electrodes and electrode coils, enabling both capacitive and inductive touch-control modes, which reduces device thickness and broadens application range by eliminating the need for a separate touch panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel and display device are arranged separately, then the display device can maintain its original structure, but the overall thickness increases
Solution Approach 1:
The patent integrates the touch panel structure directly into the array substrate by forming touch control electrodes and electrode coils within the same substrate layers. This merging of previously separate components (touch panel and display device) into a single integrated structure reduces overall device thickness while maintaining functional independence of both display and touch control operations
2Adaptability or versatility
If a separate touch panel is used, then touch control function is achieved, but the device complexity increases
Solution Approach 1:
The array substrate is designed to perform multiple functions: it serves as both the display device substrate and the touch panel substrate. The same substrate contains both display pixel electrodes and touch control electrodes, enabling the device to function as both a display and a touch-sensitive interface, thereby reducing overall device complexity
3Ease of manufacture
If touch control electrodes and electrode coils are integrated in the same conductive layer, then manufacturing is simplified, but signal interference occurs
Solution Approach 1:
The patent resolves the conflict between manufacturing simplicity and signal interference by transitioning from a two-dimensional planar arrangement to a three-dimensional layered structure. Touch control electrodes and electrode coils are placed in different conductive layers (different z-dimensions) rather than the same layer, which maintains manufacturing feasibility through sequential layer formation while preventing signal interference through spatial separation
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 integration of touch-control electrodes and electrode coils into the array substrate reduces device thickness and allows switching between capacitive and inductive touch-control modes, enhancing the display device's applicability across various applications.
Implementation Method 1
an inductive detection signal is inputted to the electrode coils
Implementation Method 2
a capacitive detection signal is inputted through the electrode coils to the touch-control electrodes
Data Source
AI summary
An array substrate, a display panel and a display device are provided, each including multiple touch-control electrodes independent from each other and multiple electrode coils. A position of each electrode coil corresponds to a position of one touch-control electrode. Since the touch-control electrodes and the electrode coils are integrated into the array substrate and the touch panel needs not to be separately arranged outside the display device, the thickness of the display device may be effectively reduced. In addition, the touch-control structure includes the touch-control electrodes and the electrode coils, i.e., a self-capacitive structure and an inductive structure, enabling the display device to work in both the capacitive touch-control mode and the inductive touch-control mode; hence, the display device can be applicable to different applications by switching between the two touch-control modes, broadening the application range of the display device.