Touch Display Module Integrating Capacitive and Electromagnetic Layers
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Solution Overview
Problem
Existing touch screens face challenges in achieving compatibility between electromagnetic pens and capacitive pens, leading to increased thickness, power consumption, and manufacturing cost, while also compromising touch effects for fingers, capacitive pens, and electromagnetic pens.
Innovation Solution
A touch display module with a capacitive touch electrode in a touch layer and an electromagnetic touch coil in a flexible substrate, disposed in different layers, allowing for simultaneous compatibility with capacitive and electromagnetic pens without interfering with each other's touch effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an EMR module or EMR antenna board is assembled and fitted on a back of a display module, then electromagnetic touch function is achieved, but thickness of the touch screen increases
Solution Approach 1:
The patent merges the electromagnetic touch coil and capacitive touch electrode into a single integrated touch screen structure, eliminating the need for separate EMR modules or antenna boards. This integration maintains electromagnetic touch functionality while reducing overall thickness by consolidating components into one layered structure.
Solution Approach 2:
The patent resolves layer interference by positioning the electromagnetic touch coil and capacitive touch electrode in different spatial layers within the touch screen. The electromagnetic coil is placed in a first layer while the capacitive electrode is placed in a second layer, allowing both functions to operate independently without mutual interference.
2Ease of manufacture
If electromagnetic touch coils and capacitive touch electrodes are disposed in a same layer, then manufacturing convenience is improved, but induction of the electromagnetic touch coils and capacitive touch electrodes will interfere with each other
Solution Approach 1:
The patent transitions from a single-layer configuration to a multi-layer configuration, placing the electromagnetic touch coil and capacitive touch electrode in different layers. This spatial separation eliminates electromagnetic interference between the two components while preserving manufacturing feasibility through standardized layered fabrication processes.
3Adaptability or versatility
If an EMR module is assembled on the back of a display module, then electromagnetic touch is achieved, but power consumption increases
Solution Approach 1:
The patent combines the electromagnetic touch coil and capacitive touch electrode into a single integrated system, eliminating the need for separate EMR modules that would consume additional power. This integration optimizes power usage by sharing common structural and electrical resources between the two touch modalities.
4Adaptability or versatility
If an EMR module is assembled on the back of a display module, then electromagnetic touch is achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates the electromagnetic touch coil and capacitive touch electrode into a single manufactured component, eliminating the need for separate assembly steps and additional parts. This consolidation reduces manufacturing complexity, material costs, and assembly operations compared to using separate EMR modules.
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 thin, power-efficient, and cost-effective touch screen that achieves optimal touch effects for both capacitive and electromagnetic pens, without increasing thickness or manufacturing costs.
Implementation Method 1
When an electromagnetic pen moves on the touch screens, built-in resonance electrons or coils will accumulate weak power due to an electromagnetic induction, electromagnetic induction signals will be generated between the electromagnetic pen and induction coils of a touch screen
Implementation Method 2
the touch layer includes a capacitive touch electrode, and the capacitive touch electrode is configured to determine a plane coordinate of a finger or a capacitive pen
Data Source
AI summary
The present invention provides a touch display module and a touch display device; by integrating an electromagnetic touch electrode in the touch display module and placing the electromagnetic touch electrode and a capacitive touch electrode in different layers, the touch display module is compatible with capacitive touch and electromagnetic touch, and at a same time, the electromagnetic touch and capacitive touch may not interfere with each other, and compared with back mounted electromagnetic induction modules in the prior art, a thickness of the touch display module can be reduced, and power consumption and manufacturing cost will not be increased.