Elastic Mold Frame for Backlight Unit Impact Absorption
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Solution Overview
Problem
Existing mold frames for backlight units are expensive to manufacture, take a long time to develop, and lack impact absorption performance, leading to high vulnerability of liquid crystal panels in high vibration and drop tests.
Innovation Solution
An elastic mold frame made of silicone or rubber, featuring a bumper portion and mounting portion to protect the liquid crystal panel, with chassis-receiving grooves for integration, reducing manufacturing time and cost while enhancing impact and vibration resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic mold frame is used, then the manufacturing process is established, but the impact absorption performance is insufficient and product defects occur frequently
Solution Approach 1:
The patent changes the material parameter from rigid plastic to elastic material, fundamentally altering the mechanical properties of the mold frame. This enables the frame to absorb impact through elastic deformation while maintaining structural integrity, directly resolving the insufficient impact absorption performance without requiring complex manufacturing processes
Solution Approach 2:
The patent employs composite construction by combining the elastic mold frame with the rigid chassis structure. The elastic material serves as a cushioning layer between the rigid chassis and the liquid crystal panel, creating a composite system that leverages both rigidity for structural support and elasticity for impact absorption
2Productivity
If an injection mold is manufactured for plastic material, then the mold frame can be produced, but the investment cost is expensive and development time is long
Solution Approach 1:
The patent changes the material parameter from plastic to elastic material, which fundamentally alters the manufacturing approach. Elastic materials can be directly molded using simpler tools and processes, eliminating the need for expensive, complex injection molds required for rigid plastics. This reduces both mold manufacturing cost and development time while maintaining production 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
The elastic mold frame improves protection against impact and vibration, reduces manufacturing time, and lowers production costs, providing enhanced reliability and durability.
Implementation Method 1
the elastic mold frame is made of an elastic material
Implementation Method 2
protect the liquid crystal panel from impact
Implementation Method 3
improved protection performance for protecting a liquid crystal panel from impact and vibration
Data Source
AI summary
A backlight unit according to an embodiment of the present invention comprises an optical sheet, a bottom chassis including a back plate and a side wall and having an accommodating space therein, a light source module accommodated in the accommodating space and disposed between the optical sheet and the back plate to irradiate light and an elastic mold frame including a mounting portion coupled to the side wall of the bottom chassis and extending from an outer side of the optical sheet toward an inner side of the optical sheet, and a bumper portion protruded in a stepped manner from an outer side of the mounting portion toward a front side, the elastic mold frame including silicone or rubber. According to one embodiment of the present invention, the protective performance for protecting the liquid crystal panel from impact and vibration is improved, and the time required for manufacturing is reduced.