Touch Screen Device Identification via Human Body Conduction
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Solution Overview
Problem
Existing methods for connecting a touch screen device with external devices, such as cellular phones and digital cameras, face challenges like low recognition rates, high processor requirements, and position errors, especially in small spaces, due to reliance on RFID, camera, and GPS schemes.
Innovation Solution
A method and apparatus that enables device identification through a touch screen by propagating a micro-current signal induced by physical touch, allowing the touch screen device to receive and identify external devices via a communication channel, using a scan frequency component to determine connection and map coordinates for interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RFID scheme is used to identify external device, then device connection is enabled, but position recognition is not possible
Solution Approach 1:
The patent combines RFID technology with touch screen interaction by detecting touch position coordinates when a user touches the screen while holding an external device. This merging allows the system to simultaneously achieve device connection (via RFID) and position recognition (via touch coordinates), resolving the contradiction between connection capability and position recognition accuracy.
2Measurement precision
If camera scheme is used to recognize external device position, then position recognition is enabled, but high processor performance is required
Solution Approach 1:
The patent replaces the camera-based optical recognition system with a touch-based mechanical interaction system. Instead of using image processing to detect device position, the system uses touch screen coordinate detection when a user physically touches the screen while holding the external device. This substitution significantly reduces processor requirements while maintaining position recognition accuracy.
3Measurement precision
If GPS scheme is used to recognize external device position, then position recognition is enabled, but device complexity and position error increase in small spaces
Solution Approach 1:
The patent extracts the position recognition function from complex GPS hardware and relocates it to the touch screen interface. By detecting touch coordinates on the screen when a user holds an external device, the system achieves position recognition without requiring GPS receivers or other complex positioning hardware in the display device, thereby reducing device complexity suitable for small spaces.
4Volume of moving object
If touch screen device has small size, then portability is improved, but interaction difficulty with external devices increases
Solution Approach 1:
The patent introduces the user's body as an intermediary medium for interaction. When a user touches the screen while holding an external device, the body acts as a conductor to propagate signals between the touch screen device and the external device. This intermediary mechanism enables easy interaction between small touch screen devices and external devices without requiring physical connectors or complex coupling mechanisms.
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 real-time connection of touch screen devices with external devices through simple physical touch, reducing complexity and processor requirements, and improving interaction accuracy in small spaces.
Implementation Method 1
propagating a signal induced by touching a touch screen surface of the touch screen device to an external device through the person
Data Source
AI summary
Provided are a touch-screen based device identification and information provision method and apparatus, and computer-readable recording mediums having recorded thereon programs for executing the touch-screen based device identification method and the information provision method. The device identification method for a touch screen device includes propagating a signal induced by touching a touch screen surface to an external device via the person, receiving information about the signal detected by the external device and an identification (ID) of the external device through a communication channel, and identifying the external device by using the received information about the detected signal and the received ID of the external device. Thus, the touch screen device and the external device can be connected to each other in real time by a simple and physical touch.