Dual-Layer Blocking Layer for Display Light Interference
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Solution Overview
Problem
The reduction of bezel in display devices makes it difficult to dispose optical devices without affecting their visibility due to inflowing light, which existing technologies have not effectively addressed.
Innovation Solution
A display device design that incorporates a blocking layer with a dual-layer structure, where the first blocking layer has a lower reflectivity and absorption coefficient than the second blocking layer, both positioned in the display area to prevent light interference and enhance optical device visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel is reduced to increase screen-to-body ratio, then the display area is increased, but it becomes difficult to dispose optical devices without light interference affecting their visibility
Solution Approach 1:
The blocking layer is divided into a dual-layer structure with a first blocking layer and a second blocking layer. Each layer has different optical properties (different reflectivity and absorption coefficient values), allowing them to perform different functions in light management. This segmentation enables more effective prevention of light interference compared to a single-layer structure.
Solution Approach 2:
The blocking layer uses a composite structure combining two different materials with complementary optical characteristics. The first blocking layer and second blocking layer are composed of materials selected to provide different reflectivity and absorption coefficient values, creating a composite system that efficiently manages light interference while maintaining the reduced bezel design.
2Object-affected harmful factors
If a blocking layer is added to prevent light interference, then optical device visibility is improved, but device structure becomes more complex
Solution Approach 1:
The light interference prevention function is extracted and isolated into a dedicated blocking layer structure. By separating this function from other display components, the blocking layer can be optimized specifically for light management without affecting other display functions. The dual-layer structure is carefully designed to provide effective light interference prevention while maintaining reasonable structural complexity.
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 dual-layer blocking layer effectively reduces light interference, maintaining the optical device's performance and visibility by absorbing and reflecting light efficiently, thus addressing the challenge of bezel reduction in display devices.
Implementation Method 1
a first absorption coefficient of the first blocking layer may be smaller than a second absorption coefficient of the second blocking layer
Implementation Method 2
a first reflectivity of the first blocking layer is smaller than a second reflectivity of the second blocking layer
Data Source
AI summary
A display device includes: a substrate including a display area and a transmission area; a blocking layer disposed in the display area of the substrate and including a first blocking layer and a second blocking layer that is disposed on the first blocking layer; an insulating layer disposed on the blocking layer; a transistor disposed on the insulating layer; and a light emitting element connected to the transistor, wherein a first reflectivity of the first blocking layer is smaller than a second reflectivity of the second blocking layer, and a first absorption coefficient of the first blocking layer is smaller than a second absorption coefficient of the second blocking layer.