Digitizer Pad Single-Channel Electromagnetic Input Sensing
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Solution Overview
Problem
Conventional portable electronic devices require increased manufacturing time and costs due to additional components for detecting user inputs, leading to increased thickness and weight, and struggle with accurately sensing input positions from external devices.
Innovation Solution
An electronic device equipped with a digitizer pad formed by a single or multiple channels that senses changes in the electromagnetic field frequency and phase to determine pressure intensity and position of an external input device, reducing manufacturing complexity and improving input accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional components are provided to detect user input positions, then input detection capability is improved, but manufacturing time and costs increase
Solution Approach 1:
The patent combines multiple input detection functions into a single integrated sensor that can detect both touch position and external device input positions simultaneously, eliminating the need for separate detection components and reducing manufacturing complexity
Solution Approach 2:
The sensor is designed to perform multiple functions: detecting user touch inputs on the display and detecting inputs from external devices, making it a universal input detection solution that replaces multiple specialized components
2Measurement precision
If additional components and structures are included to sense user input, then input sensing capability is improved, but device thickness and weight increase
Solution Approach 1:
The patent merges the input sensing function into the existing display structure, using the display itself as part of the sensing mechanism, which eliminates the need for additional separate sensing components that would increase weight
3Measurement precision
If multiple channels are used in the digitizer pad, then position sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the digitizer pad into multiple channels that can independently detect electromagnetic field changes, allowing position determination through coordinate calculation from multiple detection points while maintaining manageable system 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
The solution reduces manufacturing costs and complexity while enhancing input accuracy and position sensing, allowing for thinner and lighter devices with improved user interaction.
Implementation Method 1
sensing a change in at least one of a frequency and a phase of an electromagnetic field corresponding to a pressure intensity applied by a tip of an external input device
Implementation Method 2
identifying a change in an electromagnetic field as the external input device approaches a screen window, which is placed on one side of the digitizer pad, within a threshold distance from the screen window
Data Source
AI summary
An electronic device and method for processing an input are provided. The electronic device includes a digitizer pad formed by a single channel and a digitizer pad controller configured to supply a current to the digitizer pad, sense a change in at least one of a frequency and a phase of an electromagnetic field corresponding to a pressure intensity applied by a tip of an external input device, and determine data related to the pressure intensity applied by the external input device based on the change in the at least one of the frequency and the phase of the sensed electromagnetic field.