Gradient Sensor Signaling with Mathematically Independent Drive Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gradient sensors face challenges with noise immunity and slower sensing times, limiting their effectiveness in determining positional information for input objects.
Innovation Solution
A processing system that simultaneously drives a first and second drive signal across a transmitter electrode to produce a voltage gradient, with mathematically independent signals, and uses a receiver module to demodulate the resulting signal to determine positional information for input objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gradient sensors use traditional single drive signal method, then device complexity is low, but noise immunity is poor and sensing time is slow
Solution Approach 1:
The transmitter electrode is driven by multiple independent drive signals (first drive signal and second drive signal) applied at different ends, creating segmented voltage gradients that can be independently processed to improve noise immunity
Solution Approach 2:
The patent transitions from a single drive signal approach to a multi-dimensional signaling approach by applying mathematically independent drive signals at multiple ends of the transmitter electrode, enabling spatial and temporal differentiation of signals for better noise rejection
2Speed
If gradient sensors use traditional single drive signal method, then device structure is simple, but sensing speed is slow
Solution Approach 1:
Multiple drive signals are applied simultaneously and continuously to different ends of the transmitter electrode, enabling continuous positional information detection without the need to sequentially switch between different signaling modes, thereby reducing sensing time
Solution Approach 2:
The patent changes the temporal and spatial parameters of the drive signals by applying mathematically independent signals at different ends of the transmitter electrode, enabling faster detection of positional changes through parallel signal processing
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 approach enhances noise immunity and speeds up sensing times, improving the accuracy and efficiency of positional information detection for input objects.
Implementation Method 1
produce a voltage gradient across the transmitter electrode
Implementation Method 2
receive a resulting signal with a receiver electrode
Data Source
AI summary
A processing system for an input device includes a transmitter module, a receiver module, and a determination module. The transmitter module is configured to simultaneously drive a first end of a transmitter electrode with a first drive signal and drive a second end of the transmitter electrode with a second drive signal to produce a voltage gradient across the transmitter electrode, wherein the first drive signal and the second drive signal are mathematically independent. The receiver module is configured to receive a resulting signal with a receiver electrode, the resulting signal comprising effects of the voltage gradient. The determination module is configured to determine positional information for an input object based on the resulting signal.