Display Panel Optical Pattern Layout for Stylus Detection

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Solution Overview

Problem

Conventional electronic devices with capacitive touch sensing technology require an extra digital tablet for stylus input, increasing thickness and cost, and limiting flexibility.

Innovation Solution

An electronic device with an identified pattern, visible light shielding structure, and color units that allow for invisible light detection, eliminating the need for an extra digital tablet by improving signal-to-noise ratio and reducing thickness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If an extra digital tablet is added to detect stylus input, then touch accuracy is improved, but device thickness and cost increase

Engineering Contradiction:

Improvetouch accuracyVSAvoiddevice thickness

Core Design Contradiction:

Measurement precisionVSLength of stationary object

Solution Approach 1:

The patent merges the stylus detection function with the existing display panel structure by integrating identified patterns directly into the display layers. The visible light shielding structure and color units are combined with the touch sensing layers to enable stylus detection without requiring a separate digital tablet, thereby reducing device thickness while maintaining accuracy

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The display panel structure is designed to serve multiple functions: it provides visual display, touch sensing, and stylus position detection simultaneously. The identified patterns and visible light shielding structure enable the display panel to detect stylus input directly, eliminating the need for an additional dedicated detection device

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If an extra digital tablet is added to detect stylus input, then touch accuracy is improved, but device cost increases

Engineering Contradiction:

Improvetouch accuracyVSAvoiddevice cost

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple functions (display, touch sensing, stylus detection) into a single integrated display panel structure. By merging the identified patterns with the display layers and using the existing color units for both display and detection purposes, the system eliminates the need for an additional digital tablet, thereby reducing device cost and complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The display panel is designed as a multi-functional component that handles visual output, touch input, and stylus position detection simultaneously. This universal design replaces the need for separate dedicated components, reducing overall device cost while maintaining high measurement precision

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If conventional capacitive touch sensing is used, then device structure is simple, but touch accuracy is insufficient for stylus

Engineering Contradiction:

Improvedevice structureVSAvoidtouch accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces identified patterns with specific optical properties (visible light shielding and invisible light transmittance) at localized positions within the display panel. These patterns create distinct optical signatures that enable precise stylus position detection while maintaining the overall simplicity of the capacitive touch sensing structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent utilizes optical property variations through color units and visible light shielding structures to create detectable patterns. The difference in visible light shielding and invisible light transmittance between different regions creates optical contrasts that enable accurate stylus detection without adding complex structural layers

Inventive Principle:

Principle #32Color changes

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 thickness and cost while enhancing flexibility and accuracy of touch detection by using invisible light detection and a visible light shielding structure.

Implementation Method 1

a visible light shielding structure disposed on the identified pattern and having a first portion overlapped with the identified pattern

Methodology Applied

Scientific EffectLight shielding: Absorption (EM radiation)

Implementation Method 2

a transmittance of the first color unit with respect to the invisible light is less than a transmittance of the second color unit with respect to the invisible light

Methodology Applied

Scientific EffectSelective light transmittance: Absorption (EM radiation)

Data Source

PatentUS20250362537A1Electronic device

Publication Date: 2025.11.27 INNOLUX CORP

AI summary

An electronic device including an identified pattern, a visible shielding structure, a first color unit, and a second color unit is provided. The identified pattern receives an invisible light. The visible light shielding structure is disposed on the identified pattern and includes a first portion overlapped with the identified pattern. The first color unit and the second color unit are overlapped with the first portion, in which a transmittance of the first color unit with respect to the invisible light is less than a transmittance of the second color unit with respect to the invisible light, and a first width of the first color unit is less than a second width of the second color unit.