Pen-Sensing Electrode Layer Integration for Thin Electronic Devices

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electronic devices lack an efficient method to detect detailed touch inputs using a pen, which is essential for users accustomed to writing or for specific applications like sketching and drawing.

Innovation Solution

The electronic device incorporates a sensor layer with a pen-sensing electrode disposed on a different layer than the sensing patterns and second sensing electrodes. This configuration allows for the detection of pen inputs by forming a current path in a coil form within the sensor layer, eliminating the need for a digitizer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a digitizer is added to detect pen inputs, then pen sensing capability is improved, but device thickness and weight increase

Engineering Contradiction:

Improvepen sensing capabilityVSAvoiddevice thickness

Core Design Contradiction:

Adaptability or versatilityVSLength of moving object

Solution Approach 1:

The patent merges the pen-sensing electrode with the existing sensor layer structure, combining multiple functions (touch sensing and pen sensing) into a single integrated layer. The pen-sensing electrode is formed as part of the sensor layer configuration, eliminating the need for a separate digitizer layer and thus avoiding additional thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The sensor layer is designed to perform multiple functions: detecting both touch inputs and pen inputs using the same layered structure. The pen-sensing electrode shares the same spatial and functional context as the sensing patterns, allowing the device to universally detect various input types without requiring separate dedicated components for each input method.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a digitizer is added to detect pen inputs, then pen sensing capability is improved, but device weight increases

Engineering Contradiction:

Improvepen sensing capabilityVSAvoiddevice weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of stationary object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Measurement precision

If a complex sensor structure is used to detect pen inputs, then sensing precision is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvepen input detection precisionVSAvoidsensor layer structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the sensor layer into distinct functional regions: sensing patterns for touch detection and pen-sensing electrodes for pen input detection. These segmented regions are formed within the same layer using standardized manufacturing processes, achieving precise detection functionality while maintaining manufacturing simplicity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent resolves the complexity issue by transitioning to a different dimensional approach - forming the pen-sensing electrode in the same planar layer as the sensing patterns rather than adding vertical complexity. This dimensional reorganization allows precise pen detection without increasing structural complexity, as both detection functions share the same manufacturing plane.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 enables the electronic device to detect pen inputs accurately without increasing thickness, weight, or reducing flexibility, thereby reducing production costs and enhancing user experience for pen-based inputs.

Implementation Method 1

This configuration allows for the detection of pen inputs by forming a current path in a coil form within the sensor layer

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12321544B2Electronic device including a sensor layer having a pen-sensing electrode

Publication Date: 2025.06.03 SAMSUNG DISPLAY CO LTD

AI summary

An electronic device includes a display layer displaying an image. A sensor layer is disposed on the display layer. The sensor layer includes a plurality of first sensing electrodes including a plurality of sensing patterns arranged along a first direction, and a plurality of bridge patterns electrically connecting adjacent sensing patterns of the plurality of sensing patterns. A plurality of second sensing electrodes includes a plurality of sensing portions arranged along a second direction crossing the first direction, and first connection portions extending in the second direction from the plurality of sensing portions. A pen-sensing electrode is disposed on a same layer as the plurality of bridge patterns. The pen-sensing electrode is disposed on a different layer than the plurality of sensing patterns and the plurality of second sensing electrodes.