Electrostatic Sensing Using 1D Semiconducting Linear Structures
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Solution Overview
Problem
Current touch panels lack the ability to recognize hover events using electrostatic sensing, which is essential for advanced user interactions with optically transparent display devices.
Innovation Solution
An electrostatic sensing device comprising a substrate with one-dimensional semiconducting linear structures, such as ultra-long carbon nanotubes or graphene strips, that detect changes in resistance due to electrostatic charges, allowing for the recognition of objects near but not touching the panel, by modulating the Fermi surface and electron density of states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional touch panels are used, then basic touch operation is achieved, but hover event recognition capability is lacking
Solution Approach 1:
The patent changes the material parameter of the sensing element from conventional materials to one-dimensional semiconducting linear structures (carbon nanotubes or graphene strips), which exhibit significant resistance changes in response to electrostatic charges from hover events, enabling reliable hover detection
Solution Approach 2:
The patent replaces conventional capacitive sensing mechanisms with electrostatic sensing based on one-dimensional semiconducting linear structures, utilizing the unique electrical properties of these materials to detect hover events through resistance modulation rather than traditional capacitance changes
2Measurement precision
If one-dimensional semiconducting linear structures are used for electrostatic sensing, then hover event detection sensitivity is improved, but device structure complexity increases
Solution Approach 1:
The patent extracts and utilizes only the essential one-dimensional semiconducting linear structures (carbon nanotubes or graphene strips) as the active sensing element, removing unnecessary complex structures and focusing on the minimal required configuration to achieve high sensitivity hover detection
Solution Approach 2:
The patent applies one-dimensional semiconducting linear structures specifically at the sensing interface where hover detection is needed, rather than throughout the entire device, maintaining local functionality while simplifying overall device complexity
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 reliable detection of hover events and position recognition of objects with electrostatic charge, enhancing user interaction capabilities with transparent touch panels by providing sensitive and accurate electrostatic sensing.
Implementation Method 1
the electrostatic sensing module 10 comprises a substrate 14, a first electrostatic sensing element 124 having two opposite ends, and two first electrodes 122
Implementation Method 2
detect changes in resistance due to electrostatic charges, allowing for the recognition of objects near but not touching the panel, by modulating the Fermi surface and electron density of states
Implementation Method 3
measuring the resistance changed value of the first electrostatic sensing element 124 in response to the sensed object
Data Source
AI summary
An electrostatic sensing method is provided. An electrostatic sensing device comprising an electrostatic sensing module comprising a first electrostatic sensing element, and a control unit electrically connected to the electrostatic sensing module is provided. The first electrostatic sensing element is one-dimensional semiconducting linear structure. A direct voltage is applied to the first electrostatic sensing element. A sensed object with electrostatic charge is moved to the electrostatic sensing device in a distance near but not touching the first electrostatic sensing element. A resistance changed value of the first electrostatic sensing element is measured.