Touch Panel Integrating Capacitive and Electromagnetic Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional touch screen devices can only perform either capacitive or electromagnetic touch detection, limiting their functionality.
Innovation Solution
A touch panel with both capacitive and electromagnetic touch structures integrated on the same side of a base plate, allowing for simultaneous capacitive and electromagnetic touch detection, with the electromagnetic touch structure including overlapping coils and a capacitive touch structure for self- or mutual-capacitive detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is designed to perform only capacitive or electromagnetic touch detection, then the structure is simple and manufacturing is easy, but the functionality is limited
Solution Approach 1:
The patent combines capacitive touch detection structures (first and second electrode layers) and electromagnetic touch detection structures (first and second coil layers) into a single integrated touch panel. The electrode layers and coil layers are arranged in alternating sequences, allowing both capacitive and electromagnetic touch detection functions to coexist in one device, thereby improving versatility while maintaining manageable structural complexity.
2Adaptability or versatility
If both capacitive and electromagnetic touch structures are integrated on the same side of the base plate, then both touch detection functions are achieved, but the manufacturing complexity increases
Solution Approach 1:
The touch panel is segmented into distinct functional layers: first electrode layer, first coil layer, second electrode layer, and second coil layer. Each layer performs a specific function (capacitive or electromagnetic detection), and they are arranged in alternating sequences. This segmentation allows for modular manufacturing processes where each layer can be fabricated and positioned systematically, reducing the overall manufacturing complexity despite the multi-functional integration.
3Adaptability or versatility
If multiple coil layers are added for electromagnetic touch detection, then electromagnetic touch detection is enabled, but the aperture ratio decreases
Solution Approach 1:
The patent utilizes the vertical dimension by arranging electrode layers and coil layers in alternating sequences along the thickness direction of the touch panel. This three-dimensional layering allows electromagnetic coil structures to be positioned above and below the capacitive electrode layers, enabling electromagnetic touch detection without significantly increasing the planar area occupied by coil structures, thereby preserving a higher aperture ratio.
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
Enables both capacitive and electromagnetic touch detection in a single touch screen device without increasing manufacturing complexity or thickness, maintaining low costs and aperture ratio.
Implementation Method 1
an electromagnetic touch structure for electromagnetic touch detection... multiple first coils each extending in a first direction and multiple second coils each extending in a second direction
Implementation Method 2
a capacitive touch structure for capacitive touch detection... a first electrode layer and a second electrode layer that are provided on the same side of the base plate
Data Source
AI summary
A touch panel and a touch screen display device are provided. The touch panel includes: a base plate including a display area and a border area; and a capacitive touch structure and an electromagnetic touch structure that are provided on a same side of the base plate; where the electromagnetic touch structure includes multiple first coils each extending in a first direction and multiple second coils each extending in a second direction; every two adjacent coils of the multiple first coils partly overlap each other; every two adjacent coils of the multiple second coils partly overlap each other; and the first direction is perpendicular to the second direction. The touch panel includes a capacitive touch structure for capacitive touch detection and an electromagnetic touch structure for electromagnetic touch detection, and thus may achieve both capacitive touch detection and electromagnetic touch detection.