Resistive Force Touch Control Device Using Anisotropic Conductive Adhesive
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Solution Overview
Problem
Conventional touch control devices, such as capacitive touch, are sensitive to environmental factors and limited by conductor input requirements, while resistive touch devices have inadequate sensitivity and short lifetimes, restricting user experience and application range.
Innovation Solution
A resistive force touch control device is developed with a structure comprising substrates and wires of varying heights, using anisotropic conductive adhesives to enable force detection through varying sub-wire connections, simplifying the structure and allowing different force degrees to produce distinct touch signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capacitive touch control devices are used, then sensitivity is improved, but they are more easily affected by environmental factors (temperature, humidity) resulting in drift phenomenon and only support conductor input
Solution Approach 1:
The touch detection function is segmented into multiple force-sensitive sub-wires with different heights. When force is applied, sub-wires contact in sequence based on their height differences, creating distinct electrical connection states that correspond to different force levels. This segmentation allows the device to detect both presence and intensity of touch while maintaining compatibility with various input media including gloved fingers.
Solution Approach 2:
The patent changes the physical parameter of wire height to create force-sensitive detection. By arranging sub-wires at different heights, the system transforms mechanical force into electrical connection states. This parameter change enables the touch controller to detect force magnitude while being insensitive to environmental factors like temperature and humidity that affect capacitive touch.
2Device complexity
If resistive touch control devices are used, then structure simplicity and reliability are improved, but sensitivity is inadequate and lifetime is short
Solution Approach 1:
The resistive touch structure is enhanced by segmenting the conductive elements into multiple sub-wires at different heights. This segmentation maintains the simple resistive touch structure while adding force detection capability. The multiple connection states created by sequential sub-wire contact provide sensitive force measurement without complicating the overall device structure.
Solution Approach 2:
The patent adds a vertical dimension (height difference) to the traditional planar resistive touch structure. By arranging sub-wires at different heights along the vertical axis, the system creates multiple contact states that correspond to different force levels. This dimensional addition enhances sensitivity while preserving the inherent simplicity and reliability of resistive touch technology.
3Adaptability or versatility
If force touch is realized in resistive touch control device, then application range is expanded, but device structure becomes more complex
Solution Approach 1:
Force touch capability is achieved by segmenting conductive wires into multiple sub-wires with different heights. This segmentation approach adds force detection functionality to resistive touch devices without requiring completely new structures. The modular nature of adding height-varied sub-wires keeps the overall structure relatively simple while expanding application range to include force-sensitive interfaces.
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 enables the realization of force touch in resistive touch devices, reducing costs and expanding application range by allowing any force-applying medium to input, providing enhanced user experience and feedback.
Implementation Method 1
first anisotropic conductive adhesive located between the plurality of first wires and the plurality of second wires
Data Source
AI summary
The present invention provides a resistive force touch control device. The resistive force touch control device includes a first substrate and a second substrate spaced facing one another, a plurality of first wires parallelly spaced from one another and disposed on one side of the first substrate facing the second substrate, a plurality of second wires parallelly spaced from one another and disposed on one side of the second substrate facing the first substrate, and first anisotropic conductive adhesive located between the plurality of first wires and the plurality of second wires, wherein the plurality of first wires intersects the plurality of second wires. Therefore, force touch can be realized.