Light Guide Plate with Barrier Rib for Quantum Dot Protection
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Solution Overview
Problem
Current display apparatuses with non-luminous displays, such as liquid crystal displays, face challenges in achieving improved display quality and manufacturing efficiency, particularly in effectively guiding and converting light for uniform illumination.
Innovation Solution
A display apparatus featuring a light guide plate with a light guide portion, a barrier rib portion, a wavelength conversion portion, and a cover portion, where the wavelength conversion portion includes quantum dots to convert blue light into green and red light, and the light guide and cover portions are made of transparent materials, with the barrier rib portion potentially made of frit glass, enhancing light distribution and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate with separate components is used to guide and convert light, then display quality can be improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple functional components (light guide portion, barrier rib portion, wavelength conversion portion) into a single integrated light guide plate structure. This merging approach maintains the optical performance benefits of separate components while simplifying the overall device structure and reducing manufacturing complexity.
Solution Approach 2:
The light guide plate is designed to perform multiple functions simultaneously: guiding light from the light source, converting wavelengths through quantum dots, and providing structural support. This multi-functionality reduces the number of separate components needed while maintaining display quality.
2Ease of manufacture
If wavelength conversion material is exposed to external environment, then manufacturing process is simpler, but the lifespan of the wavelength conversion material decreases due to moisture and air exposure
Solution Approach 1:
The patent uses the light guide plate itself as a protective enclosure that seals the wavelength conversion material. The plate acts as a barrier film preventing moisture and air from reaching the quantum dots, thereby extending their lifespan while maintaining manufacturing simplicity.
Solution Approach 2:
The light guide plate structure serves dual purposes: it guides light for display functionality and simultaneously protects the wavelength conversion material from environmental degradation. This self-service approach eliminates the need for separate protective structures.
3Stability of the object's composition
If additional fixing structures are used to secure components, then structural stability improves, but manufacturing complexity and time increase
Solution Approach 1:
The barrier rib portion is integrated directly into the light guide plate structure, eliminating the need for separate fixing structures. This merging maintains structural stability while reducing the number of assembly steps and improving manufacturing efficiency.
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
This configuration improves display quality by providing uniform white light to the display panel, extends the lifespan of the wavelength conversion material by sealing it from external moisture and air, and simplifies manufacturing by integrating components and eliminating the need for additional fixing structures.
Implementation Method 1
a wavelength conversion portion disposed on the upper surface of the light guide portion to be surrounded by the barrier rib portion, and including the wavelength conversion material
Implementation Method 2
a light guide plate guiding the light to the display panel
Data Source
AI summary
A display apparatus according to an embodiment of the inventive concept may include a display panel, a light guide panel, and the light source. The light guide plate may include a light guide portion, a barrier rib portion, a wavelength conversion portion, and a cover portion. The barrier rib portion may be disposed on an upper surface of the light guide portion. The wavelength conversion portion may be disposed on the upper surface of the light guide portion to be surrounded by the barrier rib portion. The cover portion may be disposed on the wavelength conversion portion and the barrier rib portion, and cover the wavelength conversion portion.