Integrated Optical Member for Narrow Bezel Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid-crystal display devices require a separate backlight unit for light emission, limiting their ability to achieve narrow bezels and uniform luminance due to the need for light source arrangement, which complicates the display structure and assembly.
Innovation Solution
An integrated optical member that combines a diffuser plate, a wavelength conversion layer, and a passivation layer, along with a diffusing pattern layer, to perform wavelength conversion and light diffusion, simplifying assembly and enhancing luminance uniformity by dispersing and converting light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate backlight unit is used for light emission, then light sources can be disposed, but the bezel area increases and the structure becomes complex
Solution Approach 1:
The patent combines the diffuser plate and wavelength conversion layer into a single integrated optical member. The wavelength conversion layer is directly formed on the diffuser plate, eliminating the need for separate backlight components and reducing the overall bezel area while maintaining light emission functionality.
Solution Approach 2:
The integrated optical member performs multiple functions simultaneously: it diffuses light, converts wavelengths, and serves as a protective structure. This multi-functionality allows the removal of separate backlight units while maintaining all necessary light emission and distribution capabilities.
2Reliability
If multiple separate optical components are used, then each function can be optimized, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The diffuser plate and wavelength conversion layer are integrated into a single optical member, reducing the number of components that need to be assembled. This simplification maintains functional optimization while significantly reducing assembly complexity and production time.
3Reliability
If multiple separate optical components are used, then each function can be optimized, but fabrication costs increase
Solution Approach 1:
The integrated optical member reduces fabrication costs by eliminating the need to manufacture, handle, and assemble multiple separate components. The wavelength conversion layer is directly formed on the diffuser plate using cost-effective techniques, reducing overall manufacturing complexity and material costs.
4Device complexity
If light sources are disposed on one side, then the structure is simplified, but luminance uniformity deteriorates
Solution Approach 1:
The diffuser plate incorporates a diffusing pattern with varying local properties - different regions have different diffusion characteristics to compensate for the one-sided light source arrangement. This creates uniform luminance distribution across the display area despite the simplified single-side light source structure.
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 integrated optical member simplifies the display device assembly, reduces fabrication costs, and achieves improved luminance uniformity by diffusing and converting light, allowing for a narrower bezel design without the need for separate backlight components.
Implementation Method 1
a wavelength conversion layer disposed on a top surface of the diffuser plate
Implementation Method 2
a diffuser plate including a diffusing pattern
Data Source
AI summary
An optical member and display device, the optical member including a diffuser plate, a wavelength conversion layer disposed on a top surface of the diffuser plate, a passivation layer disposed on the wavelength conversion layer and covering a side surface of the wavelength conversion layer on at least one side thereof, and a diffusing pattern layer disposed on and in direct contact with a bottom surface of the diffuser plate and containing diffusion particles.