Transparent Display Optical Layers for Luminance and See-Through Balance

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Solution Overview

Problem

Transparent display devices face challenges in simultaneously achieving high luminance and high light-transparency due to clearances between neighboring light-emitting elements, which reduce the proportion of the light-emitting region.

Innovation Solution

The display device incorporates first and second light-emitting elements emitting different wavelengths, with optical layers positioned to reflect or absorb specific wavelengths, allowing light emission in one direction and transparency in the other, while using quantum dots as light emitters to enhance color purity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If clearances are provided between neighboring light-emitting elements to ensure transparency, then light-transparency is improved, but the proportion of light-emitting region decreases

Engineering Contradiction:

Improvelight-transparencyVSAvoidlight-emitting region proportion

Core Design Contradiction:

Illumination intensityVSArea of stationary object

Solution Approach 1:

The patent divides the optical path into two directions: a first direction for light emission from light-emitting elements and a second direction for light transmission. By segmenting the functional requirements into different spatial directions, the display device can simultaneously achieve high luminance in the emission direction and high transparency in the transmission direction without requiring clearances between elements.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If clearances are provided between neighboring light-emitting elements, then light-transparency is improved, but luminance is reduced

Engineering Contradiction:

Improvelight-transparencyVSAvoidluminance

Core Design Contradiction:

Illumination intensityVSPower

Solution Approach 1:

The patent transitions from a two-dimensional planar arrangement where clearances are needed to a three-dimensional configuration using optical layers positioned at different depths. The optical layers are arranged in the second direction (opposite to light emission direction) to coincide with light-emitting elements, creating a vertical stacking arrangement that eliminates the need for lateral clearances while maintaining transparency.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Manufacturing precision

If optical layers are added to reflect or absorb specific wavelengths, then color purity is improved, but device complexity increases

Engineering Contradiction:

Improvecolor purityVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The optical layers serve multiple functions simultaneously: they reflect or absorb specific wavelengths to improve color purity of emitted light, maintains device transparency in the second direction, and are positioned to coincide with light-emitting elements to enhance luminance. This multi-functionality reduces the need for separate components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This configuration enables efficient simultaneous achievement of high luminance and high light-transparency by optimizing light emission and transmission, maintaining white balance without separate transparent regions.

Implementation Method 1

the first optical layer being transparent to the light having the second wavelength and reflective or absorptive of the light having the first wavelength

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

the first optical layer being transparent to the light having the second wavelength and reflective or absorptive of the light having the first wavelength

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 3

the second optical layer being transparent to the light having the first wavelength and reflective or absorptive of the light having the second wavelength

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 4

the second optical layer being transparent to the light having the first wavelength and reflective or absorptive of the light having the second wavelength

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Data Source

PatentUS12543482B2Display device

Publication Date: 2026.02.03 SHARP KK

AI summary

A display device, includes: a first light-emitting element emitting a first light having a first wavelength; and a second light-emitting element emitting a second light having a second wavelength, the first light and the second light being released in a first direction; a first optical layer formed in a second direction with respect to the first light-emitting element, and positioned to coincide with the first light-emitting element in the second direction, the first optical layer being transparent to the light having the second wavelength and reflective or absorptive of the light having the first wavelength; and a second optical layer formed in the second direction with respect to the second light-emitting element, and positioned to coincide with the second light-emitting element in the second direction, the second optical layer being transparent to the light having the first wavelength and reflective or absorptive of the light having the second wavelength.