Transparent Elastic Support Strips for LCD Backlight Structural Stability
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Solution Overview
Problem
Existing liquid crystal display apparatuses face challenges in maintaining a stable structure and display quality when using optical films as diffusion structures due to the low mechanical strength of these films and the need for additional supporting structures that can affect light uniformity and visibility.
Innovation Solution
A direct type backlight module is designed with a backboard, light sources, and an optical film supported by transparent elastic supporting strips, which are mounted on the backboard and do not interfere with light uniformity, providing structural stability and buffering forces to prevent stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a diffusion plate is used as an optical diffusion structure, then the backlight module has good light diffusion performance, but an additional supporting structure is required which causes contour to be presented on the picture and reduces display quality
Solution Approach 1:
The patent combines the supporting structure and the optical diffusion structure into a single integrated component. The support bar is made of transparent elastic material that serves both as a structural support element and as an optical diffusion element, eliminating the need for separate supporting structures that would create visible contours on the display.
Solution Approach 2:
The patent changes the material parameter of the support bar from traditional opaque materials to transparent elastic material. This parameter change allows the support bar to both mechanically support the optical film and diffuse light effectively, while its transparency prevents it from creating visible contours on the display picture.
2Device complexity
If the optical film is used as an optical diffusion structure, then the structure is simplified and weight is reduced, but the optical film has low mechanical strength and requires careful selection of supporting structure
Solution Approach 1:
The patent uses a flexible transparent elastic support bar that can deform elastically under the weight of the optical film. This flexible support bar provides the necessary mechanical strength to hold the optical film taut and flat, while the elastic property allows it to accommodate thermal expansion and contraction without damaging the optical film.
Solution Approach 2:
The patent employs composite material properties in the support bar by combining transparency and elasticity. The transparent elastic material provides both the optical properties needed for light diffusion and the mechanical properties needed for structural support, creating a multi-functional component that addresses both the simplified structure requirement and the mechanical strength requirement.
3Stability of the object's composition
If a supporting structure is added to support the optical film, then the structural stability is improved, but the supporting structure may interfere with light uniformity
Solution Approach 1:
The patent changes the optical parameter of the supporting structure by using transparent material instead of opaque materials. This allows the supporting structure to maintain structural stability while being optically invisible, thus not interfering with light uniformity. The transparency parameter ensures that light passes through the support bar without significant obstruction or distortion.
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 solution enhances the structural stability and display quality of liquid crystal display apparatuses by using transparent elastic supporting strips that maintain light uniformity and support the optical film effectively, ensuring a stable and high-quality display.
Implementation Method 1
a plurality of supporting strips located on a side of the optical film facing toward the bottom plate and made of transparent elastic material
Data Source
AI summary
Embodiments of the present invention relate to a display technical field and disclose a liquid crystal display apparatus and a backlight module thereof. The backlight module comprises: a backboard having a bottom plate and a plurality of side plates to form a light source receiving chamber; a plurality of light sources located in the light source receiving chamber and mounted on the bottom plate; an optical film located in the light source receiving chamber, edges of the optical film being mounted on the backboard; a plurality of supporting strips located at a side of the optical film facing toward the bottom plate and made of transparent elastic material, a surface of the supporting strips facing toward the optical film abutting against a surface of the optical film facing toward the bottom plate and two ends of the supporting strip being mounted on two opposing side plates of the backboard respectively. The backlight module is a direct type backlight module, and the supporting strips are in a line contact or surface contact with the optical film, thus stress concentration will not occur between the supporting strips and the optical film. In the above backlight module, the optical film is structurally stable while used as a diffusion element and may increase the display quality of the liquid crystal display apparatus.