Touch Sensor Layer Integration for Precise Pen Input Detection
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Solution Overview
Problem
Existing multimedia electronic devices lack efficient methods for accurately sensing inputs from pens, particularly in applications requiring precise touch or drawing, without increasing thickness or weight through the use of digitizers.
Innovation Solution
The electronic device incorporates a sensor layer with specific electrode configurations and modes for sensing both touch and pen inputs, utilizing first and second electrodes, bridge patterns, and pen-sensing electrodes to detect pen inputs by induced currents, eliminating the need for a digitizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a digitizer is used to sense pen inputs, then pen sensing capability is improved, but device thickness and weight increase
Solution Approach 1:
The patent merges the pen sensing function with the existing sensor layer that is already present for touch input detection. The sensor layer includes first electrodes and second electrodes arranged in a matrix pattern, where the same electrodes serve both touch sensing and pen input sensing purposes. This integration eliminates the need for a separate digitizer layer, thereby preventing weight and thickness increase while maintaining pen sensing capability.
Solution Approach 2:
The sensor layer is designed to perform multiple functions: it detects both touch inputs from fingers and pen inputs from styluses using the same electrode structure. The control circuit selectively activates different sensing modes based on the input type, making the sensor layer a universal input detection mechanism that replaces the need for dedicated digitizer hardware.
2Measurement precision
If a digitizer is used to sense pen inputs, then pen sensing capability is improved, but device thickness increases
Solution Approach 1:
The patent combines the pen sensing function within the existing sensor layer structure, eliminating the need for an additional digitizer layer. The first electrodes and second electrodes are arranged in a matrix pattern within the sensor layer, allowing pen input detection without increasing device thickness.
Solution Approach 2:
The patent transitions from a three-layer structure (display layer, digitizer layer, sensor layer) to a two-layer structure by integrating pen sensing capabilities into the sensor layer. This dimensional reduction is achieved by using the same electrode matrix for both touch and pen sensing, thereby reducing overall device thickness.
3Measurement precision
If separate pen sensing electrodes are added, then pen sensing precision is improved, but device complexity increases
Solution Approach 1:
The patent merges pen sensing electrodes with the existing touch sensing electrode matrix. The first electrodes and second electrodes serve dual purposes: detecting finger touches and detecting pen inputs. This merging approach maintains pen sensing precision while avoiding the complexity increase that would result from adding separate dedicated pen sensing electrodes.
Solution Approach 2:
The electrode matrix is designed as a universal sensing structure that can detect both capacitive touch inputs and pen inputs through induced currents. The control circuit intelligently distinguishes between different input types and activates appropriate sensing algorithms, maintaining precision while simplifying the overall electrode configuration.
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 accurate pen input detection without adding thickness or weight, enhancing user experience in applications like sketching or drawing, while maintaining device flexibility and reducing complexity.
Implementation Method 1
pen-sensing electrodes at a same layer as, and extending in an extension direction of, one of the first bridge pattern or the second bridge pattern
Data Source
AI summary
Disclosed is an electronic device which includes a sensor layer, and a sensor driver configured to drive the sensor layer, and configured to selectively operate in a first mode to sense a touch input or in a second mode to sense a pen input, wherein the sensor layer includes first electrodes arranged in a first direction, and including first sensing patterns spaced apart in a second direction crossing the first direction, and a first bridge pattern between the first sensing patterns, second electrodes arranged in the second direction, and including second sensing patterns spaced apart in the first direction, and a second bridge pattern between the second sensing patterns, and pen-sensing electrodes at a same layer as, and extending in an extension direction of, one of the first bridge pattern or the second bridge pattern.