Transparent Display Anti-Reflection Structure with Blue Color Compensation

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Solution Overview

Problem

Transparent display devices face degradation in transparency due to insulating films stacked on the transmitting area, which also cause color variation issues without effectively compensating for transmittance loss.

Innovation Solution

The implementation of an upper anti-reflection structure with a blue color-compensating layer on the upper substrate, which includes a blue dye or pigment, helps to improve transparency by adjusting the content of blue dye to maintain transmittance without deteriorating it, and a similar configuration on the lower substrate further enhances color correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If insulating films are stacked on the transmitting area to ensure proper operation of the emitting area, then the insulating function is improved, but the transparency and transmittance of the transmitting area are degraded

Engineering Contradiction:
Improveinsulating functionVSAvoidtransmittance
Core Design Contradiction:
ReliabilityVSIllumination intensity

Solution Approach 1:

The patent applies color compensation by forming a blue color-compensating layer in the transmitting area to counteract the yellowish coloration caused by insulating films. This layer adjusts the color balance to maintain visual transparency while allowing the insulating films to remain in place for proper device operation.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The patent uses a composite structure combining multiple layers including insulating films and color-compensating layers. The insulating films provide electrical isolation while the color-compensating layer optically compensates for the color shift, creating a multi-functional composite structure that addresses both electrical and optical requirements.

Inventive Principle:
Principle #40Composite materials

2Reliability

If insulating films are stacked on the transmitting area to ensure proper operation of the emitting area, then the insulating function is improved, but color variation occurs without effective compensation

Engineering Contradiction:
Improveinsulating functionVSAvoidcolor accuracy
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The patent forms a blue color-compensating layer specifically designed to counteract the yellowish coloration induced by insulating films. This color compensation mechanism restores accurate color representation in the transmitting area while maintaining the necessary insulating function.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The color-compensating layer is selectively formed in the transmitting area where color variation occurs due to insulating films, while the emitting area maintains its original structure. This localized approach applies color compensation only where needed without affecting other functional areas of the display device.

Inventive Principle:
Principle #3Local quality

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 solution effectively prevents transparency degradation and color variation in the transmitting area of the display device by optimizing the content and placement of blue dye or pigment in the anti-reflection structures on both substrates, ensuring high transmittance and improved color accuracy.

Implementation Method 1

an upper anti-reflection structure with a blue color-compensating layer on the upper substrate, which includes a blue dye or pigment, helps to improve transparency by adjusting the content of blue dye

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

Implementation Method 2

The implementation of an upper anti-reflection structure with a blue color-compensating layer on the upper substrate

Methodology Applied
Scientific EffectAnti-reflective coating: Anti-Reflective Coating

Data Source

PatentEP3340307B1Transparent display device including an emitting area and a transmitting area
Publication Date: 2020.10.21 LG DISPLAY CO LTD
  • EP3340307B1 patent drawingFigure 1~3
  • EP3340307B1 patent drawingFigure 4~5
  • EP3340307B1 patent drawingFigure 6~7

AI summary

A transparent display device including an emitting area and a transmitting area is provided. An upper AR structure is disposed on an upper substrate. The upper AR structure includes an upper reflection-preventing layer and an upper color-compensating layer having a blue dye. As a result, the transparency of the transmitting area is increased.