Electromagnetic Induction Touch Screen with Grid Array Antenna
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Solution Overview
Problem
Traditional touch-control panels face high costs, complex manufacturing processes, low accuracy, and susceptibility to physical damage, especially for large-sized screens, which limits their widespread adoption and operational lifespan.
Innovation Solution
A touch control display screen with a built-in membrane antenna array lattice electromagnetic induction layer, featuring a shield layer, buffering layer, and induction control circuit, where the induction layer is formed by silver-plasma or silver-carbon-plasma materials printed on insulation membranes, enhancing accuracy and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transparent touch film with resistance layer is used, then touch control function is achieved, but manufacturing cost increases and process complexity increases
Solution Approach 1:
The patent replaces the mechanical resistance-layer touch film system with an electromagnetic induction system. The induction layer uses electromagnetic fields to detect touch positions, eliminating the need for complex resistance layers and their associated wiring structures. This substitution dramatically simplifies the manufacturing process and reduces costs while maintaining touch control functionality.
Solution Approach 2:
The patent changes the fundamental detection parameter from electrical resistance (in traditional touch films) to electromagnetic induction. By using the electromagnetic induction law, the system detects touch positions through changes in magnetic field distribution, which simplifies the structural requirements and manufacturing processes compared to traditional resistance-based systems.
2Measurement precision
If a transparent touch film with resistance layer is used, then touch control function is achieved, but identification accuracy decreases for large-sized panels
Solution Approach 1:
The patent divides the large touch panel into multiple grid units, each with its own induction线圈 (coil). This segmentation allows for finer resolution across large areas while maintaining simple local structures. The grid-based approach enables accurate position detection throughout the entire large panel by processing signals from individual coil segments.
Solution Approach 2:
The electromagnetic induction system inherently provides better scalability for large panels compared to resistance films. The magnetic field-based detection can be uniformly distributed across large areas without the wiring complexity and resistance variations that plague large-sized resistance touch panels, thereby maintaining high identification accuracy.
3Reliability
If a transparent touch film is used, then touch control function is achieved, but the touch film is susceptible to physical damage and abrasion
Solution Approach 1:
The patent replaces the mechanical touch film structure with an electromagnetic induction system that has no exposed mechanical layers. The induction layer can be integrated directly with the display panel structure, eliminating the need for separate touch films that are prone to abrasion and physical damage. This integration significantly improves reliability and operating life.
Solution Approach 2:
The patent employs composite material structures in the induction layer, combining conductive materials with the display panel substrate to create a unified, abrasion-resistant structure. This composite approach integrates the touch functionality directly into the panel manufacturing process, eliminating separate fragile touch film layers.
4Ease of operation
If traditional resistance-induction method is used, then touch control is implemented, but the system is inconformal for handwriting input
Solution Approach 1:
The electromagnetic induction system naturally conforms to handwriting input by detecting the continuous movement and pressure variations of writing tools through magnetic field changes. The system can detect both the position and pressure of handwriting strokes, providing natural and accurate recognition of handwritten input without the limitations of resistance-based systems.
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 solution reduces manufacturing costs, improves identification accuracy, and extends the operational life of touch screens by using a flexible electromagnetic induction array that is protected from physical damage, making it suitable for large-sized screens.
Implementation Method 1
an induction layer is provided in the rear of the display screen, the output of the induction layer is connected to an induction control circuit
Data Source
AI summary
A touch control display screen with built-in membrane antenna array lattice electromagnetic induction layer, including at least a display screen and a shell; wherein an induction layer is provided in the rear of the display screen, the output of the induction layer is connected to an induction control circuit, a display screen control circuit is also provided in the shell; the induction layer is the antenna array printed on the insulation membrane and arranged along the X, Y axes, therein the area enclosed by each lattice unit constitutes one induction cell. Because the electromagnetic induction layer is provided in the rear of the display screen and flexible membrane-type, printed electromagnetic induction array antenna is used as the identifying induction component according to the present invention, the manufacture is easy, the cost is low, and the advantage in cost-cut is prominent in comparison with the prior art when the area of the display screen is larger. The accuracy of identification is high, and the mouse information or handwriting information can be input exactly by means of brush strokes of finger strokes; as a touch screen, the display screen is covered by a protecting film to avoid the physical damage, so it has long operating life.