Side-Glowing Optical Fiber Backlight Module Heat Management
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Solution Overview
Problem
Edge-lit backlight modules in liquid crystal display devices face issues with warping and deformation due to heat generation from light sources, leading to light leakage and the need for additional heat dissipating devices.
Innovation Solution
The implementation of a side-glowing optical fiber system, where a light source is connected to a terminal of the optical fiber, allowing light to be transmitted to a light guide plate without being directly adjacent, thus eliminating the need for a heat dissipating device and preventing warping and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source is disposed on the side of the light guide plate to provide backlight, then the light guide plate can be illuminated effectively, but the light source generates heat causing warping and deformation of the light guide plate
Solution Approach 1:
The patent introduces an optical fiber as an intermediary component between the light source and the light guide plate. The optical fiber transmits light from the light source to the light guide plate without requiring direct contact, thereby mediating the energy transfer while isolating the heat source from the light guide plate structure.
Solution Approach 2:
The patent extracts the light source from its conventional position adjacent to the light guide plate and relocates it to an external position connected via optical fiber. This separation removes the heat-generating component from proximity to the light guide plate, eliminating the thermal problem while maintaining optical functionality.
2Temperature
If a heat dissipating device is added to prevent warping and deformation of the light guide plate, then thermal management is improved, but the device complexity increases
Solution Approach 1:
The optical fiber serves as a thermal isolator, acting as an intermediary that allows optical energy transmission while blocking thermal energy transfer. This eliminates the need for additional heat dissipating devices by preventing heat transfer at the source.
Solution Approach 2:
The solution extracts the heat dissipation function from the system by removing the heat source from proximity to the light guide plate. Since the light source is relocated and connected via optical fiber, heat dissipation devices become unnecessary, simplifying the overall device structure.
3Use of energy by moving object
If the light source is placed close to the light guide plate for effective illumination, then light utilization is improved, but the light guide plate experiences warping and deformation due to heat
Solution Approach 1:
The optical fiber acts as a mediator that decouples the spatial relationship between light source and light guide plate. It allows efficient light transmission while maintaining physical separation, thus preserving light guide plate stability without compromising light utilization efficiency.
Solution Approach 2:
The light source is extracted from its position adjacent to the light guide plate and relocated to an external position. The optical fiber maintains the optical connection while the physical separation preserves the structural stability and flatness of the light guide plate.
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 solution allows the light source to be placed outside the backlight module, reducing heat-related issues and enhancing light distribution, while also reducing the number of light sources required for uniform illumination, thereby increasing light utilization and module thinness.
Implementation Method 1
a side-glowing optical fiber comprises a light emitting section and a light guide section, the light emitting section is fixed to at least one side of the light guide plate, the light guide section extends from the light emitting section to the outside of the light guide plate, and a terminal of the light guide section is connected to the light source
Implementation Method 2
The edge-lit backlight module is capable of converting a point light source or a linear light source which is disposed on a side of the light guide plate into an area light source
Data Source
AI summary
According to the present disclosure, there are provided a backlight module and a display device. With the backlight module, a heat dissipating device can be saved, and a light guide plate is prevented from being warped and deformed due to heat generation of a light source. The backlight module comprises a light source, a light guide plate and a side-glowing optical fiber. The side-glowing optical fiber includes: a light emitting section which is fixed to at least one side of the light guide plate; and a light guide section, which extends from the light emitting section to the outside of the light guide plate, and a terminal of which is connected to the light source.