Backlight Structure Protrusion Notch Fixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight structures for LCD devices are inadequate in withstanding vibrations and impact tests due to the use of rigid frames and poor shockproof designs, leading to potential damage from displacement and impact, and they fail to effectively reduce noise and friction between components.
Innovation Solution
A backlight structure comprising a frame body, a light guide plate, and optical films with protrusions and notches that are fixed by a member to limit sliding and noise interference, using materials like stainless steel for the frame and polyethylene terephthalate for the optical films, which are designed to absorb and distribute stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid metal rear plate is used, then the structural strength is improved, but the light guide plate is easily broken when subjected to impact-drop test
Solution Approach 1:
The patent introduces a shock-absorbing layer between the light guide plate and the rigid rear plate. This layer acts as a flexible buffer that can deform under impact forces, absorbing shock energy and preventing direct transmission of impact to the light guide plate, thereby solving the contradiction between structural strength and impact resistance
Solution Approach 2:
The shock-absorbing layer is pre-installed between the light guide plate and rear plate before assembly. This cushioning element is positioned in advance to protect the light guide plate from potential impact damage during drop tests, embodying the principle of beforehand cushioning
2Ease of manufacture
If a plastic frame is used, then the ease of manufacture is improved, but the frame cannot effectively reduce the displacement between the light guide plate and the optical film when vibrated
Solution Approach 1:
The frame is constructed as a composite structure combining plastic and metal materials. The plastic portion maintains ease of manufacture and assembly, while the metal reinforcement provides enhanced rigidity and stability to reduce displacement between components during vibration, resolving the contradiction between manufacturing ease and component stability
Solution Approach 2:
The frame employs local quality enhancement by strategically placing metal reinforcement only in critical areas where rigidity is needed to prevent component displacement, while maintaining plastic material in other areas to preserve ease of manufacture and assembly
3Ease of operation
If manual double-side adhesive arrangement is used, then the ease of operation is improved, but the friction between the light guide plate and the films causes damage to the surface of the light guide plate
Solution Approach 1:
The patent introduces a protrusion structure on the light guide plate that acts as an intermediary between the adhesive and the film surface. This protrusion reduces the contact area and friction between the film and light guide plate surface, preventing surface damage while still allowing effective adhesion through the protrusion
Data Source
AI summary
A backlight structure includes a frame body, a light guide plate, a first optical film, a second optical film, and a fixed member. The frame body has a first frame edge and a second frame edge opposite thereto. The light guide plate is disposed in the frame body and has a first and second short border corresponding respectively to the first frame edge and the second frame edge. The light guide plate has a protrusion protruding from an upper surface of the light guide plate and being adjacent to the second short border. The optical films are disposed over the light guide plate and include a first and second short-edge portion disposed respectively over the first short border and the second short border. The second short-edge portion has a notch matching the protrusion. The fixed member fixes the frame body and the optical films.