Interactive Display Digital Pad Generation via Impedance Detection
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Solution Overview
Problem
Current touch screen systems face challenges in accurately distinguishing between interactive and non-interactive objects on a surface, leading to difficulties in adjusting personalized display areas and interpreting user inputs from passive devices effectively.
Innovation Solution
The implementation of a touch screen system that uses drive-sense circuits and impedance circuits to detect changes in capacitance and frequency effects caused by user input passive devices, allowing for the recognition of objects and adjustment of display areas based on their interactive status and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional capacitive touch screens are used to detect user input, then the system can detect finger touches, but it cannot accurately distinguish between interactive devices (like pens) and non-interactive objects (like cups or papers)
Solution Approach 1:
The patent applies parameter changes by detecting frequency effects and impedance changes in the capacitive circuit when different objects interact with the touch screen. Interactive devices with capacitive elements produce distinct frequency responses and impedance changes compared to non-interactive objects, enabling accurate differentiation through electrical parameter analysis
Solution Approach 2:
The patent replaces traditional mechanical or simple capacitive touch detection with an electrical impedance and frequency-based detection system. By measuring the electrical characteristics (impedance, frequency response) of objects interacting with the screen, the system can identify interactive devices without mechanical switches or complex sensors
2Area of stationary object
If the display area is expanded to provide more content, then the information display capacity increases, but the risk of obstruction by objects placed on the screen increases
Solution Approach 1:
The patent applies preliminary action by detecting objects on the screen surface before they can obstruct the display. The system proactively identifies the presence, location, and type of objects using capacitive sensing and impedance measurement, then pre-adjusts the display area or generates digital pads to prevent obstruction issues before they occur
Solution Approach 2:
The patent implements dynamics by making the display area adaptive and reconfigurable in real-time. The system dynamically adjusts the active display region based on detected object positions and types, creating movable digital pads or resizing display areas to maintain optimal viewing and interaction while accommodating objects on the screen surface
3Adaptability or versatility
If passive devices without capacitive elements are placed on the screen, then they can be used as non-interactive objects, but they cannot be distinguished from interactive devices by traditional touch detection
Solution Approach 1:
The patent applies parameter changes by measuring frequency response and impedance characteristics of objects on the screen. Interactive devices with capacitive elements produce specific frequency shifts and impedance changes in the capacitive circuit, while non-interactive passive objects produce different or minimal changes, enabling precise differentiation through electrical parameter comparison
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 precise identification and interaction with user input passive devices, allowing for dynamic adjustment of display areas to avoid obstruction and enhance user experience by accurately differentiating between interactive and non-interactive objects on the screen.
Implementation Method 1
a plurality of drive sense circuits operable to detect a change in capacitance of a capacitive sensor
Implementation Method 2
a plurality of impedance circuits operable to detect a frequency effect
Data Source
AI summary
A method includes transmitting, by a plurality of drive-sense circuits of an interactive display device, a plurality of signals on a plurality of electrodes of the interactive display device. The method further includes detecting, by a set of drive-sense circuits of the plurality of drive-sense circuits, a change in electrical characteristics of a set of. The method further includes interpreting, by a processing module of the interactive display device, the change in the electrical characteristics of the set of electrodes to be caused by a user input passive device in close proximity to an interactive surface of the interactive display device, generating a digital pad on the interactive surface for interaction with the user input passive device, and interpreting user inputs received from the user input passive device in close proximity to the digital pad as functions to manipulate data on a display area of the interactive display device.