Display Device Light Blocking Layer Carbon Black
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with organic light emitting elements face issues with visibility due to reflection or transmission of external light, which affects the quality and appearance of the display.
Innovation Solution
A display device incorporating a light blocking layer made of carbon black with a specific weight percentage and particle size, applied between the substrate and cover panel, to absorb external light and reduce visibility from the inside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light blocking layer is added to reduce visibility of the inside of the display panel, then display quality is improved, but device complexity increases
Solution Approach 1:
The light blocking layer is integrated within the existing display device structure, nested between the substrate and cover panel. This allows the light blocking function to be incorporated without adding external components, thereby improving display quality while minimizing increases in device complexity.
Solution Approach 2:
The light blocking layer serves multiple functions: it blocks external light from entering the display panel, prevents internal light leakage, and can be integrated with existing structural layers. This multi-functionality addresses the visibility issue while avoiding the need for separate dedicated components.
2Object-affected harmful factors
If a light blocking layer is added to absorb external light, then display quality is improved, but manufacturing complexity increases
Solution Approach 1:
The light blocking layer is combined with existing structural layers of the display device, such as being integrated with the substrate or cover panel. This merging approach allows the light blocking function to be achieved through material selection and layer integration rather than through complex multi-step manufacturing processes.
Solution Approach 2:
The patent specifies particular parameters for the light blocking layer including carbon black content (3-10 wt%) and particle size (320-470 nm). By optimizing these material parameters, the light blocking effectiveness is maximized while maintaining compatibility with standard manufacturing processes, thus improving display quality without significantly increasing manufacturing complexity.
3Object-affected harmful factors
If carbon black with specific content and particle size is used in the light blocking layer, then light absorption efficiency is improved, but material cost increases
Solution Approach 1:
The patent optimizes the carbon black content to a specific range (3-10 wt%) and particle size (320-470 nm) to achieve maximum light absorption efficiency. By precisely controlling these parameters, the patent ensures effective light blocking while avoiding excessive material usage, thus balancing performance improvement with material cost considerations.
Solution Approach 2:
The patent uses carbon black particles with specific size ranges that can be obtained through standard manufacturing processes. By specifying realistic and achievable particle size ranges (320-470 nm), the patent ensures that high light absorption efficiency can be achieved using commercially available materials and processes, rather than requiring exotic or expensive materials.
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 light blocking layer effectively absorbs external light, reducing visibility from the inside of the display panel, improving display quality while also allowing for a thinner and lighter design.
Implementation Method 1
a light blocking layer contacting a second side that faces the first side of the substrate... the light blocking layer effectively absorbs external light
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device according to an exemplary embodiment of the present inventive concept includes: a substrate (110); a thin film transistor (130) provided on a first side of the substrate; a first electrode (160) connected with the thin film transistor; an organic emission layer (170) provided on the first electrode and emitting light; a second electrode (180) provided on the organic emission layer; and a light blocking layer (11) contacting the substrate from a second side that faces the first side of the substrate, wherein the light is emitted in a direction toward the second electrode from the organic emission layer.