Integrated Electromagnetic Sensor Coils in Display Panels
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Solution Overview
Problem
Conventional flat panel display apparatuses with input functions face challenges in distinguishing between digital pens/styluses and user palms, degrade optical characteristics, and increase weight and cost due to the need for additional printed circuit boards with sensor coils or antennas, especially in modern thin and light display designs.
Innovation Solution
An integrated electromagnetic type input flat panel display apparatus is developed, which integrates electromagnetic sensor units directly into the display panel using thin film transistors and sensor coils, eliminating the need for additional printed circuit boards and allowing for precise touch control without degrading optical quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If electromagnetic sensor units are integrated directly into the display panel, then the weight and cost are reduced and alignment issues are eliminated, but the manufacturing precision requirements increase
Solution Approach 1:
The patent merges the electromagnetic sensor units with the display panel by integrating the sensor coils and thin film transistors directly into the display panel structure. This consolidation eliminates the need for separate printed circuit boards and additional alignment processes, thereby reducing weight and manufacturing complexity while maintaining precise functionality.
2Reliability
If sensor coils are placed on additional printed circuit boards, then electromagnetic sensing function is achieved, but the weight and cost increase
Solution Approach 1:
The patent combines the electromagnetic sensing function with the display panel structure by integrating sensor coils and thin film transistors directly into the panel. This eliminates the need for separate printed circuit boards, thereby reducing weight while maintaining reliable electromagnetic sensing functionality.
Solution Approach 2:
The display panel serves multiple functions: it provides visual display through pixel units and electromagnetic sensing through integrated sensor units. This multi-functionality eliminates the need for separate hardware components, reducing overall weight and cost while achieving both display and input sensing capabilities.
3Ease of operation
If resistive-type or capacitive-type touch modules are placed on the display panel, then touch control function is achieved, but the optical characteristics are degraded
Solution Approach 1:
The patent replaces mechanical or capacitive touch modules with an electromagnetic sensing system integrated into the display panel. The sensor coils detect touch through electromagnetic interaction rather than physical contact or surface capacitance changes, eliminating the need for additional layers that would degrade optical characteristics while maintaining touch control functionality.
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 the weight and cost of the display apparatus, prevents alignment issues, and maintains optical quality by integrating sensor coils and transistors within the display panel, enabling effective hand-writing input without additional hardware.
Implementation Method 1
The electromagnetic sensor unit includes a plurality of sensor units. Each sensor unit has a second thin film transistor and a sensor coil.
Data Source
AI summary
An integrated electromagnetic type input flat panel display apparatus is disclosed. The integrated electromagnetic type input flat panel display apparatus comprises a display panel, a control unit and a signal processing unit. The display panel has a display unit and an electromagnetic sensor unit, wherein the display unit and the electromagnetic sensor unit are integrated in to a substrate of the display panel. The signal processing unit receives and processes the signals from the electromagnetic sensor unit.