Multi-Wavelength Pixel Layout for Versatile Light-Emitting Devices

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Solution Overview

Problem

Existing light-emitting devices are limited to providing a single cosmetic or therapeutic effect, requiring multiple devices for different effects, as they emit light of a specific wavelength.

Innovation Solution

A light-emitting device with multiple pixels capable of emitting different wavelengths, featuring varying thicknesses of auxiliary layers and pixel configurations to emit light of varying wavelengths from adjacent pixels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a light-emitting device emits light of a specific wavelength to provide an optimized cosmetic or therapeutic effect, then the treatment effectiveness for a single lesion is improved, but the device can only provide one effect and multiple devices are required for different effects

Engineering Contradiction:

Improvetreatment effectivenessVSAvoidnumber of effects provided

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The light-emitting device is divided into multiple independent light-emitting units, each capable of emitting light at a specific wavelength. Each unit includes a light-emitting element with specific auxiliary layers that determine its emission wavelength, allowing the device to provide multiple different effects simultaneously or selectively

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A single light-emitting device is designed to perform multiple cosmetic or therapeutic functions by integrating multiple light-emitting units with different emission wavelengths. The device can be configured to emit blue light for acne treatment, red light for anti-aging, green light for pigmentation, and other wavelengths for different skin concerns, eliminating the need for multiple separate devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple pixels with different wavelengths are arranged in a single device, then the versatility and efficiency are enhanced, but the device complexity increases due to varying auxiliary layer thicknesses and configurations

Engineering Contradiction:

Improvenumber of wavelengths emittedVSAvoidauxiliary layer configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Different auxiliary layers are designed with specific local properties to control the emission wavelength of each light-emitting unit. By adjusting the thickness, material composition, or stack configuration of auxiliary layers in specific regions, each pixel can be tailored to emit a desired wavelength while maintaining a systematic manufacturing approach

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The emission wavelength of each light-emitting unit is controlled by changing parameters of the auxiliary layers, such as thickness, material composition, or layer stack configuration. This allows precise tuning of each pixel's emission characteristics during the manufacturing process without fundamentally changing the overall device structure

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If deposition material is deposited on overlapping first and second areas of the substrate, then pixels with different auxiliary layer thicknesses can be formed, but the manufacturing precision requirements increase

Engineering Contradiction:

Improveauxiliary layer thickness controlVSAvoiddeposition process

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The deposition process is designed to pre-form auxiliary layers with specific thickness profiles by controlling the deposition parameters and mask patterns before final device assembly. This preliminary structuring of auxiliary layers with varying thicknesses enables subsequent processing steps to proceed with standard precision requirements

Inventive Principle:

Principle #10Preliminary action

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 a single device to provide multiple cosmetic or therapeutic effects by emitting light of varying wavelengths, enhancing versatility and efficiency.

Implementation Method 1

depositing a deposition material by supplying the deposition material from a deposition source to the process substrate through the mask assembly

Methodology Applied

Scientific EffectPhysical Vapour Deposition: Physical Vapour Deposition

Data Source

PatentUS12581826B2Light-emitting device and a method of manufacturing a light-emitting device in which material is deposited on first and second areas of a substrate

Publication Date: 2026.03.17 SAMSUNG DISPLAY CO LTD

AI summary

A method of manufacturing a light-emitting device including a body portion and a light-emitting portion arranged in the body portion and configured to emit light to the outside. The light-emitting portion includes a plurality of pixels. At least two of the pixels are configured to emit pieces of light having different wavelengths from each other.