Cover Plate Structure for Display Devices with Light-Shielding Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Reflective displays suffer from light leakage issues due to the thickness of protective covers, which affects display quality, especially when no external light source is present, and worsens with colored ink layers.
Innovation Solution
A cover plate structure comprising a light-transmitting substrate, a first light-shielding layer, and a light-transmitting covering layer, where the total thickness of the light-shielding and covering layers accounts for 1%-33% of the substrate, minimizing the distance between the shielding and covering layers to reduce light leakage, and including materials like glass, PMMA, and anti-glare layers for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the protective cover is made thicker to protect the light guide plate, then the protection capability is improved, but the distance between the outer surface and the ink layer increases, causing light leakage and deteriorating display quality
Solution Approach 1:
The protective cover is divided into multiple functional layers: a light-shielding layer (with ink pattern or metallic layer) and a light-transmitting covering layer. This segmentation allows the light-shielding layer to prevent light leakage while the covering layer provides protection, resolving the contradiction between thickness and light leakage.
Solution Approach 2:
The protective cover uses composite material structure combining light-shielding material (ink or metallic layer) and light-transmitting material (cover plate). This composite approach enables simultaneous achievement of light shielding function and mechanical protection without increasing overall thickness.
2Object-affected harmful factors
If the protective cover is made thinner to reduce light leakage, then the light leakage is reduced, but the protection capability of the light guide plate is compromised
Solution Approach 1:
By segmenting the protective cover into light-shielding layer and light-transmitting covering layer, the design achieves effective light shielding with minimal thickness while maintaining protection capability through the combined functionality of both layers.
Solution Approach 2:
The light-shielding layer is applied locally where needed (at the edges and regions prone to light leakage) rather than uniformly throughout the entire cover. This local application of light-shielding material minimizes thickness increase while effectively preventing light leakage in critical areas.
3Shape
If a colored ink layer is used for the protective cover, then the aesthetic appearance is improved, but the light leakage problem becomes even worse
Solution Approach 1:
The protective cover is segmented into a light-shielding layer (which can be colored for aesthetics) and a light-transmitting covering layer. The light-shielding layer handles both aesthetic function and light leakage prevention, while the covering layer maintains optical transparency.
Solution Approach 2:
The composite structure combines colored light-shielding material with transparent light-transmitting material, enabling the colored layer to provide aesthetic appearance and light shielding without compromising the optical performance of the overall protective cover.
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 reduces light leakage, enhancing display performance and maintaining a lightweight, thin design by minimizing the distance between the light-shielding and covering layers, thereby improving the reflectivity and clarity of the display.
Implementation Method 1
After light is transmitted into the protective layer from the light guide plate, the light is easily reflected between the outer surface of the protective cover and the ink layer
Data Source
AI summary
A cover plate structure for a display device is provided. The cover plate structure includes a light-transmitting substrate, a light-shielding layer, and a light-transmitting covering layer. The light-transmitting substrate has a flat upper surface and a lower surface. The light-shielding layer is disposed on an edge of the flat upper surface of the light-transmitting substrate and in direct contact with the flat upper surface. The light-transmitting covering layer is located on the light-shielding layer and the light-transmitting substrate.