Electromagnetic Induction Touch Layer for High-Precision Display Modules
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Solution Overview
Problem
Current capacitive touch technologies in display panels suffer from poor writing experience, high latency, and low precision, limiting their development in professional fields.
Innovation Solution
A display module with a light-emitting backplane incorporating a substrate, an electromagnetic induction layer, and a light-emitting component layer, featuring a grid of first and second electromagnetic induction coils that sense magnetic flux changes for accurate touch coordinates, allowing for improved touch precision and effect without increasing panel thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If capacitive touch technology is integrated into the display panel, then touch functionality is achieved, but touch precision and writing experience deteriorate due to large charge difference requirements
Solution Approach 1:
The patent replaces capacitive touch sensing with electromagnetic induction sensing. Instead of detecting charge differences on the panel surface, the system uses electromagnetic induction coils to detect changes in magnetic flux caused by the stylus, fundamentally changing the sensing mechanism from electrical to electromagnetic to achieve higher precision
Solution Approach 2:
The patent changes the sensing parameter from charge difference (capacitive) to magnetic flux change (electromagnetic induction). By using electromagnetic induction coils and detecting magnetic flux variations, the system achieves more precise touch detection with smaller stylus tips, directly addressing the precision limitation of capacitive touch
2Adaptability or versatility
If capacitive touch technology is used, then touch functionality is provided, but latency increases and writing experience deteriorates
Solution Approach 1:
The patent substitutes capacitive sensing with electromagnetic induction sensing, which provides faster response times. The electromagnetic induction coils can detect stylus position in real-time through magnetic flux changes, reducing the latency inherent in capacitive charge detection and improving writing experience
3Measurement precision
If electromagnetic induction coils are integrated into the display panel, then touch precision is improved, but panel thickness increases
Solution Approach 1:
The patent merges the electromagnetic induction coils with the existing display panel structure. The coils are integrated into the panel layers, combining the touch sensing function with the display structure itself, thereby achieving high precision touch without adding significant thickness to the overall panel
Solution Approach 2:
The electromagnetic induction coils are nested within the display panel structure, with the coils positioned between existing functional layers. This nesting approach allows the touch sensing function to be embedded within the panel without increasing its external dimensions, maintaining thin profile while achieving precise touch detection
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
Enhances touch accuracy and effect by sensing magnetic flux changes, integrating touch functionality without affecting the luminescence or increasing the thickness of the display panel, thus improving the overall performance of display modules in mobile terminals.
Implementation Method 1
an electromagnetic induction layer arranged on the substrate and configured for receiving an electromagnetic signal
Implementation Method 2
the electromagnetic induction layer includes a plurality of first electromagnetic induction coils arranged in the first direction and extending to the second direction, and a plurality of second electromagnetic induction coils arranged in the second direction and extending to the first direction
Data Source
AI summary
A display module and a mobile terminal are provided, which includes a light-emitting backplane. The light-emitting backplane includes a substrate, and an electromagnetic induction layer and a light-emitting component layer sequentially arranged on the substrate. The light-emitting component layer includes a plurality of light-emitting components distributed in an array along a first direction and a second direction intersecting with each other. The electromagnetic induction layer includes first electromagnetic induction coils arranged in the first direction and extending to the second direction and second electromagnetic induction coils arranged in the second direction and extending to the first direction.