Optical Layer Particles Reduce Glare in Display Cover Glass

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Solution Overview

Problem

Current display devices fail to achieve sufficient clearness for displaying images, necessitating an improvement in the technology to enhance visibility.

Innovation Solution

A display device comprising a glass plate with an adhesive layer and an optical layer containing particles and a matrix, where the optical layer has specific surface features such as protrusions and depressions, and the particles are oriented parallel to the glass plate, improving image clarity and reducing glare.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a cover glass is fixed to the display panel using an adhesive layer, then adhesion between components is improved, but clearness and visibility of the display are insufficient

Engineering Contradiction:
ImproveadhesionVSAvoidclearness
Core Design Contradiction:
StrengthVSIllumination intensity

Solution Approach 1:

The patent applies composite materials by combining an optical layer with specific particles (having refractive indices different from the matrix) embedded in a matrix material. This composite structure is then integrated with the glass plate and adhesive layer to form a multi-layer cover member. The composite optical layer simultaneously provides adhesion support and optical enhancement functions, resolving the contradiction between structural strength and visual clearness.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent implements local quality by creating a specific optical layer with localized particle distributions and refractive index variations. The particles are strategically positioned within the matrix to create regions with different optical properties, allowing the cover member to maintain uniform adhesion while providing localized optical enhancement to improve display clearness and reduce glare.

Inventive Principle:
Principle #3Local quality

2Strength

If the display panel is covered with a glass plate and adhesive layer, then structural protection is improved, but glare and distortion occur reducing image clarity

Engineering Contradiction:
Improvestructural protectionVSAvoidglare and distortion
Core Design Contradiction:
StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by modifying the refractive index distribution within the optical layer through the strategic incorporation of particles with specific refractive indices. This changes the optical parameters of the cover member to reduce glare and distortion effects, while maintaining the structural protection function provided by the glass plate and adhesive layer.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent converts the potentially harmful effect of light reflection and glare into a beneficial effect by using particles with specific refractive indices to scatter and redirect light. This transforms the harmful glare into a benefit by improving overall image clarity and reducing distortion, while the structural protection function remains intact.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

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 significantly enhances image clarity and visibility by reducing glare and distortion, allowing for a clearer display of images on the panel.

Implementation Method 1

an optical layer that is layered on the second surface of the glass plate... the particles form protrusions and depressions on a surface of the optical layer

Methodology Applied
Scientific EffectLight scattering: Scattering

Data Source

PatentUS20230176264A1Display device
Publication Date: 2023.06.08 NIPPON SHEET GLASS CO LTD
  • US20230176264A1 patent drawing
  • US20230176264A1 patent drawing
  • US20230176264A1 patent drawing

AI summary

The present invention includes a display panel, and a cover member arranged on the display panel. The cover member includes a glass plate having a first surface and a second surface, an adhesive layer that is layered on the first surface of the glass plate and fixes the glass plate to the display panel, and an optical layer that is layered on the second surface of the glass plate.