Foldable Display Pen Sensing With Integrated Digitizer Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices with separate sensor and digitizer layers increase thickness, necessitating a solution to reduce thickness while maintaining sensing accuracy.
Innovation Solution
An electronic device with a display layer, sensor layer, and digitizer that includes a foldable area and non-foldable areas, utilizing detection electrodes and different driving frequencies for improved sensing accuracy, and a conductive shielding layer to minimize thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sensor layer and digitizer are used, then sensing accuracy is improved, but device thickness increases
Solution Approach 1:
The patent merges the sensor layer and digitizer into a single integrated sensing structure. The sensor layer includes both first sensing electrodes for detecting user touch and second sensing electrodes for detecting pen input, eliminating the need for a separate digitizer layer and reducing overall device thickness while maintaining multi-mode sensing capability
Solution Approach 2:
The sensor layer is designed to perform multiple functions simultaneously - it can detect both direct user touch through first sensing electrodes and pen input through second sensing electrodes. This multi-functional design replaces what would traditionally require separate dedicated layers for different input modes
2Measurement precision
If multiple detection electrodes are used, then sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The sensor layer is segmented into functionally distinct electrode regions - first sensing electrodes for user touch detection and second sensing electrodes for pen detection. This segmentation allows each electrode type to be optimized for its specific function while being managed through a unified control system that drives both types with appropriate signals
Solution Approach 2:
Different regions of the sensor layer have different properties - the first sensing electrodes are configured for detecting capacitive changes from user fingers, while the second sensing electrodes are configured for detecting electromagnetic induction from pens. Each region's electrode pattern, spacing, and driving frequency are locally optimized for its specific detection purpose
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 device thickness by optimizing electrode configurations and shielding, enhancing sensing accuracy and reliability.
Implementation Method 1
a sensor layer disposed on the display layer and that includes a plurality of detection electrodes
Implementation Method 2
the pen is driven by an alternating current (AC) signal that generates an oscillating magnetic field, and the oscillating magnetic field induces a signal in the coils
Data Source
AI summary
An interface device includes an electronic device and an input device. The electronic device includes a display layer that includes a display area that includes a foldable area and non-foldable areas, a sensor layer that includes a plurality of detection electrodes, and a sensor driving unit that drives the sensor layer. The plurality of detection electrodes include a first pen sensing electrode and a second pen sensing electrode, and the sensor driving unit transmits to the first pen sensing electrode one of a first sensing signal that has a first driving frequency or a second sensing signal that has a second driving frequency that differs from the first driving frequency according to a position of the input device with respect to the display area.