Optical Glass Light Guide Plate with Conductive Hydrogel Cavity
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Solution Overview
Problem
Traditional light guide plates in LCD backlight modules, typically made of plastic, suffer from heat concentration issues, leading to inadequate heat dissipation and poor light guide effects, which hinder display quality and efficiency.
Innovation Solution
A light guide plate made of optical-grade glass with a cavity filled with conductive hydrogel, which transitions between liquid and colloidal states under electrical influence, incorporating tiny crystal particles for enhanced light reflection and diffusion, and potentially quantum dots or fluorescent powder for improved color gamut, along with improved heat conduction characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional plastic light guide plate is used, then the manufacturing cost is low and ease of manufacture is high, but heat dissipation performance is poor and light guide effect is insufficient
Solution Approach 1:
The patent employs a composite structure consisting of an optical-grade glass light guide plate combined with conductive adhesive material. This composite material approach allows the glass plate to provide superior heat dissipation and optical performance while the conductive adhesive ensures proper thermal and electrical conduction, thereby resolving the contradiction between ease of manufacture and heat dissipation performance.
Solution Approach 2:
The patent changes the material parameter from traditional plastic to optical-grade glass, which fundamentally alters the thermal conductivity and optical properties. This parameter change enables the light guide plate to achieve both good heat dissipation performance and manufacturing feasibility, as glass materials with appropriate thermal and optical characteristics can be processed using established manufacturing techniques.
2Ease of manufacture
If a traditional plastic light guide plate is used, then the manufacturing cost is low, but light transmission efficiency and light guide effect are insufficient
Solution Approach 1:
The patent uses a composite material system where optical-grade glass serves as the light guide plate material. This glass material possesses superior optical transmission properties compared to traditional plastics, enabling improved light guide effect and illumination intensity while maintaining manufacturing feasibility through established glass processing techniques.
Solution Approach 2:
The patent replaces the traditional plastic material system with an optical-grade glass material system. This substitution introduces materials with inherently better optical transmission characteristics and light guiding properties, thereby improving light transmission efficiency while the manufacturing processes remain economically viable through standardized glass fabrication methods.
3Temperature
If optical-grade glass is used for the light guide plate, then heat dissipation performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent segments the backlight assembly into distinct functional components: the optical-grade glass light guide plate for heat dissipation and optical guidance, and the conductive adhesive material for thermal and electrical conduction. This segmentation allows each component to be optimized independently and assembled using standard processes, reducing overall manufacturing complexity despite the use of advanced glass materials.
Solution Approach 2:
The patent introduces conductive adhesive material as an intermediary between the optical-grade glass light guide plate and other components. This intermediary serves multiple functions: ensuring thermal conduction, providing electrical connectivity, and facilitating the assembly process. By using this intermediary, the patent simplifies the integration of the complex glass-based light guide plate into the overall backlight system.
4Device complexity
If conventional materials are used, then the structure is simple, but display quality and color gamut are limited
Solution Approach 1:
The patent employs optical-grade glass as a composite material that inherently provides superior optical properties including enhanced light transmission, better color rendering, and improved display quality. While the material itself is advanced, the overall structure remains relatively simple by integrating this high-performance material directly into the light guide plate configuration without requiring complex multi-layer structures.
Solution Approach 2:
The patent changes the material parameter from conventional plastic to optical-grade glass, which fundamentally improves display quality and color gamut. This parameter change achieves enhanced illumination intensity and display performance while maintaining structural simplicity, as the glass material's inherent optical properties eliminate the need for additional complex optical layers or components.
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 optical-grade glass light guide plate with conductive hydrogel enhances light transmission, reflection, and heat dissipation, resulting in improved light efficiency and display quality, while addressing heat accumulation issues and offering ultra-high color gamut capabilities.
Implementation Method 1
the conductive hydrogel converts between the liquid state and the colloidal state, and the tiny crystal particles in the conductive hydrogel make a plurality of deflections under an action of an electronic field
Implementation Method 2
when a light passes through a crystal having a fixed deflection direction, an optical rotation effect happens, making the light be able to transmit in the light guide plate in the colloidal state
Implementation Method 3
Comparing to a light guide plate made of plastic in the prior art, the light guide plate in the present disclosure adopts a main body made of an optical-glass material... improved heat conduction characteristics
Implementation Method 4
the tiny crystal particles may further enhance the function of the reflection and diffuse reflection of the light, allowing more light to penetrate
Implementation Method 5
the tiny crystal particles may further enhance the function of the reflection and diffuse reflection of the light
Implementation Method 6
if further adding a material of the quantum dots or the fluorescent powder to the conductive hydrogel, it may further improve an ultra-high color gamut of the backlight
Data Source
Figure 1~3
Figure 4~5
AI summary
A backlight module, a light guide plate (10), and a preparation method for conductive hydrogel of the light guide plate (10). The main body of the light guide plate (10) is an optical glass material. A cavity (20) is provided in the light guide plate (10), and is filled with conductive hydrogel (21). Either end of the light guide plate (10) is provided with an electrode electrically connected to the conductive hydrogel (21) in the cavity (20). When not electrified, the conductive hydrogel (21) is in a liquid state, and when electrified, the conductive hydrogel (21) in the cavity (20) changes to a gel state. Microcrystal particles are added to the conductive hydrogel (21) to improve a light refection function and a light diffuse reflection function of the light guide plate (10). The light guide plate (10) can improve the light refection function and the light diffuse reflection function of the backlight module, so as to allow more light rays to penetrate through the light guide plate (10) to improve the luminous efficacy. The addition of quantum dots or fluorescent powder to the conductive hydrogel (21) can further increase the color gamut of backlight, such that a liquid crystal display device has a better effect.