Cover Panel Reflectance Layering for Uniform Display Luminance

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Solution Overview

Problem

Existing electronic devices experience luminance differences between the opening of a cover panel and adjacent regions due to varying reflectance, which affects display quality.

Innovation Solution

The electronic device incorporates a cover panel with a first and second cover layer, where the second layer has equal to or less reflectance than the first, and includes a protective film and adhesive layers to manage reflectance, ensuring a uniform luminance across the display region.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a cover panel with opening is used to accommodate electronic module, then integration is improved, but luminance uniformity deteriorates due to reflectance difference between opening region and adjacent region

Engineering Contradiction:

Improveintegration of electronic moduleVSAvoidluminance uniformity

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The patent applies local quality by differentiating the reflectance properties of different regions in the cover panel. Specifically, the region adjacent to the opening is designed with a first reflectance while the opening region has a second reflectance that is equal to or less than the first reflectance. This local differentiation allows the electronic module to be integrated in the opening while controlling the luminance appearance to maintain uniformity across the entire cover panel surface.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If single-layer cover panel is used, then manufacturing is simplified, but luminance control capability is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidluminance control precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent segments the cover panel into multiple layers with different reflectance characteristics. The cover panel includes a first layer with a first reflectance and a second layer with a second reflectance, where the second reflectance is equal to or less than the first reflectance. This segmentation enables precise control over luminance in different regions, particularly allowing the opening region to have controlled luminance properties while maintaining manufacturing feasibility through layered construction.

Inventive Principle:

Principle #1Segmentation

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 effectively reduces luminance differences between the cover panel opening and adjacent regions, enhancing display characteristics and overall display quality.

Implementation Method 1

a first cover layer not overlapping the opening, and having a first reflectance, a second cover layer not overlapping the opening, disposed under the first cover layer, and having a second reflectance

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentEP4657411A1Electronic device

Publication Date: 2025.12.03 SAMSUNG DISPLAY CO LTD

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AI summary

Provided is an electronic device including a display panel which displays an image, a cover panel contacting a lower part of the display panel, having an opening defined therein, and having a gray color reflectance, and an electronic module disposed overlapping the opening on a plane, and the cover panel includes a first cover layer not overlapping the opening and having a first reflectance, and a second cover layer not overlapping the opening and disposed under the first cove layer, and having a second reflectance.