Display Apparatus Light Absorption Layer Foldable Design

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Solution Overview

Problem

Conventional organic electroluminescent display apparatuses face limitations in reducing external light reflection, leading to decreased luminance and increased thickness, especially when attempting to fold these displays, due to the use of polarizing plates which also restrict their folding capabilities.

Innovation Solution

A display apparatus is designed with a light absorption layer integrated inside the front member, which absorbs external light and minimizes reflection, eliminating the need for a separate polarizing plate, thereby reducing thickness and manufacturing costs while enhancing visibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a polarizing plate is attached to the front surface of the display panel to prevent deterioration of visibility due to external light reflection, then visibility is improved, but the overall luminance of the display apparatus is reduced and the thickness increases

Engineering Contradiction:

Improveexternal light reflectionVSAvoidthickness

Core Design Contradiction:

Object-affected harmful factorsVSLength of stationary object

Solution Approach 1:

The patent combines the light absorption function into the front member itself by forming a light absorption layer inside the front member. This merges the protective function (reducing external light reflection) with the structural component (front member), eliminating the need for a separate polarizing plate and thereby reducing overall thickness

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The front member is designed as a composite structure incorporating a light absorption layer. This composite material approach allows the front member to simultaneously provide structural support and optical functionality (absorbing external light), replacing the traditional polarizing plate without increasing thickness

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

Engineering Contradiction:

Improveexternal light reflectionVSAvoidluminance

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The light absorption function is merged into the front member by forming a light absorption layer inside it. This integration eliminates the need for a separate polarizing plate that would reduce luminance, while still achieving the goal of reducing external light reflection and improving visibility

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The light absorption layer is positioned specifically inside the front member at the location where external light first enters the display apparatus. This localized absorption approach targets external light reflection without affecting the luminance of the displayed image, as the absorption occurs before light enters the display panel

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If a polarizing plate is used in the organic electroluminescent display apparatus, then external light reflection is reduced, but the folding capability of the display apparatus is restricted

Engineering Contradiction:

Improveexternal light reflectionVSAvoidfolding capability

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The light absorption function is merged into the front member, which can be designed as a flexible structure suitable for foldable displays. This eliminates the need for a rigid polarizing plate and enables the display apparatus to achieve folding capability while still reducing external light reflection

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The front member incorporating the light absorption layer can be designed as a flexible thin film structure, enabling the display apparatus to be folded. This replaces the traditional polarizing plate with a flexible alternative that maintains the light absorption function while enabling folding capability

Inventive Principle:

Principle #30Flexible shells and thin films

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 integration of a light absorption layer within the front member effectively reduces external light reflection, improving visibility and allowing for more compact and cost-effective foldable display designs without the constraints of polarizing plates.

Implementation Method 1

a light absorption layer disposed inside the front member

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS20230200126A1Display apparatus

Publication Date: 2023.06.22 LG DISPLAY CO LTD

AI summary

A display apparatus can include a display panel for displaying an image, a front member disposed on the display panel, and a light absorption layer disposed inside the front member. As a result, while improving the visibility of the display apparatus, the thickness of the display apparatus can be minimized and the manufacturing cost of the display apparatus can be reduced.