Polarizing Light Emitting Plate with Integrated Barrier Layer

Solution Overview

Problem

Conventional polarizing light emitting plates are prone to deterioration due to foreign substances like moisture and oxygen, leading to reduced efficiency and increased thickness and production costs in liquid crystal display devices.

Innovation Solution

A polarizing light emitting plate design that incorporates a quantum rod layer with reduced barrier layers, protected by upper and lower barrier layers and an attachment layer with an optical structure, enhancing optical efficiency and color reproduction while minimizing thickness and production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple barrier layers are provided to protect the quantum rod layer from moisture and oxygen, then the reliability is improved, but the thickness and production cost increase

Engineering Contradiction:

Improveprotection from deteriorationVSAvoidthickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent combines the barrier layer and attachment layer into a single integrated structure. The barrier layer is formed as an integral part of the attachment layer that connects the quantum rod layer to the polarizing layer, eliminating the need for separate barrier layers while maintaining protection against moisture and oxygen. This merging reduces the total thickness and number of layers while preserving the protective function.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The attachment layer is designed to serve multiple functions simultaneously: it acts as both the attachment interface between layers and as the barrier layer providing protection against moisture and oxygen. This multi-functional design eliminates redundant layers, reducing overall thickness while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple barrier layers are provided to protect the quantum rod layer from moisture and oxygen, then the reliability is improved, but the production cost increases

Engineering Contradiction:

Improveprotection from deteriorationVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines the barrier layer and attachment layer into a single integrated structure. The barrier layer is formed as an integral part of the attachment layer that connects the quantum rod layer to the polarizing layer, eliminating the need for separate barrier layers while maintaining protection against moisture and oxygen. This merging reduces the total thickness and number of layers while preserving the protective function.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The attachment layer is designed to serve multiple functions simultaneously: it acts as both the attachment interface between layers and as the barrier layer providing protection against moisture and oxygen. This multi-functional design eliminates redundant layers, reducing overall thickness while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If conventional polarizing plates are used, then the structure is simple, but the optical efficiency and color reproduction rate are reduced

Engineering Contradiction:

ImprovestructureVSAvoidoptical efficiency

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent segments the polarizing light emitting plate into distinct functional layers: quantum rod layer, barrier layer, attachment layer, and polarizing layer. This segmentation allows each layer to be optimized for its specific function, with the quantum rod layer generating polarized light and the polarizing layer filtering and directing it, thereby improving overall optical efficiency and color reproduction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses a composite structure combining quantum rods (for polarized light generation) with a polarizing layer (for light filtering and direction). This composite design leverages the unique properties of each material to achieve superior optical efficiency and color reproduction compared to conventional polarizing plates.

Inventive Principle:

Principle #40Composite materials

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 improves the optical efficiency and color reproduction rate of liquid crystal display devices by reducing the number of barrier layers, thus protecting the quantum rod layer from external damage and lowering production costs.

Implementation Method 1

a quantum rod layer which is provided on an emission side of the backlight and converts some of blue light to red linearly polarized light and green linearly polarized light using multiple quantum rods

Methodology Applied

Scientific EffectQuantum confinement:

Implementation Method 2

a reflective polarizing layer which is provided on a side from which the red linearly polarized light and the green linearly polarized light of the quantum rod layer are emitted

Methodology Applied

Scientific EffectPolarization: Polarisation

Data Source

PatentEP3255485B1Plate emitting polarized light and display device having the same

Publication Date: 2021.11.17 SAMSUNG DISPLAY CO LTD

Figure 1~2
Figure 3~4
Figure 5A~5C

AI summary

A polarizing light emitting plate includes a polarizing layer having a polarizing axis substantially parallel to a first direction, a quantum rod layer including quantum rods aligned in the first direction, and an attachment layer between the polarizing layer and the quantum rod layer and comprising an adhesive material.