Touch Control Device With Shared Sensing Lines
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Solution Overview
Problem
Existing touch control devices compatible with both capacitive and electromagnetic touch control modes are overly complex, leading to manufacturing difficulties and hindering the trend towards lighter and thinner designs.
Innovation Solution
A touch control device with a touch control mode switching circuit that allows the touch control circuit to switch between capacitive and electromagnetic touch control modes, utilizing the same sensing signal lines for both modes, thereby eliminating the need for additional structural layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If another layer of electromagnetic touch control structure is added on top of capacitive touch control structure to achieve compatibility with both modes, then touch control accuracy and versatility are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The sensing signal lines are designed to serve dual purposes: functioning as capacitive touch control sensing signal lines when in capacitive mode, and as electromagnetic touch control sensing signal lines when in electromagnetic mode. This multi-functionality eliminates the need for separate sensing signal lines for each mode, thereby reducing structural complexity while maintaining compatibility with both touch control modes.
Solution Approach 2:
The touch control circuit is configured to dynamically switch between capacitive touch control circuit configuration and electromagnetic touch control circuit configuration based on the selected operating mode. This dynamic reconfiguration allows the same physical structure to adapt to different control modes without requiring permanent dual-layer structures.
2Measurement precision
If another layer of electromagnetic touch control structure is added to achieve both capacitive and electromagnetic control compatibility, then touch control accuracy is improved, but manufacturing difficulty increases
Solution Approach 1:
The sensing signal lines are designed to serve dual purposes: functioning as capacitive touch control sensing signal lines when in capacitive mode, and as electromagnetic touch control sensing signal lines when in electromagnetic mode. This multi-functionality eliminates the need for separate sensing signal lines for each mode, thereby reducing structural complexity while maintaining compatibility with both touch control modes.
3Adaptability or versatility
If another layer of electromagnetic touch control structure is added to achieve both capacitive and electromagnetic control compatibility, then versatility is improved, but device thickness increases
Solution Approach 1:
The sensing signal lines are designed to serve dual purposes: functioning as capacitive touch control sensing signal lines when in capacitive mode, and as electromagnetic touch control sensing signal lines when in electromagnetic mode. This multi-functionality eliminates the need for separate sensing signal lines for each mode, thereby reducing structural complexity while maintaining compatibility with both touch control modes.
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 simplifies the device structure, enhances compatibility with multiple touch control modes, and supports a thin and light design by sharing sensing signal lines between capacitive and electromagnetic modes.
Implementation Method 1
a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit
Implementation Method 2
at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit
Data Source
AI summary
An embodiment of the present application discloses a touch control device, including a touch control substrate, wherein the touch control substrate includes a base and a touch control circuit arranged on the base, and the touch control device further includes a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit, and at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit.