Backlight Device Double Hook Fixing Member Narrow Bezel
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Solution Overview
Problem
Existing backlight devices for narrow-bezel LCDs face challenges in securely fixing light guide plates without using separate tapes or screws, and they struggle to prevent light leakage through lateral surfaces.
Innovation Solution
A backlight device incorporating a fixing member with a double hook structure, comprising a first hook surrounding a convex portion of the light guide plate and a second hook protruding through an opening in the lateral surface cover, which securely fixes the light guide plate and acts as a light-blocking member to prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a holder-type fixing member is used to fix the light guide plate, then the light guide plate can be secured, but it is not easy to apply to narrow-bezel LCDs
Solution Approach 1:
The fixing member is divided into two separate hooks: a first hook that engages with the light guide plate and a second hook that engages with the lower cover. This segmentation allows the fixing member to adapt to narrow-bezel structures by distributing the fixation function across two independent engagement points, making it applicable to compact LCD designs.
Solution Approach 2:
The fixing member extends in multiple dimensions with the first hook positioned at one end and the second hook at the other end, creating a spatial arrangement that accommodates narrow-bezel constraints. The hooks are positioned at opposite ends of the light guide plate, utilizing the length dimension to achieve secure fixation in a compact structure.
2Reliability
If additional fastening methods are used to secure the light guide plate, then fixation reliability improves, but device complexity increases
Solution Approach 1:
The fixing member combines multiple functions into a single component: it provides mechanical fixation through the two hooks, acts as a light-blocking member to prevent light leakage, and serves as a structural element connecting the light guide plate to the lower cover. This merging reduces the number of separate parts needed while maintaining fixation reliability.
Solution Approach 2:
The fixing member is designed to perform multiple functions simultaneously: securing the light guide plate, blocking light leakage, and providing structural support. This multi-functionality eliminates the need for separate fastening methods, reducing device complexity while maintaining or improving fixation reliability.
3Area of stationary object
If the bezel size is reduced, then display area increases, but light leakage through lateral surfaces becomes more problematic
Solution Approach 1:
The light-blocking function is extracted and integrated into the fixing member itself. The fixing member includes a light-blocking structure that prevents light from leaking through the lateral surfaces of the light guide plate, allowing bezel reduction without compromising light containment.
Solution Approach 2:
The fixing member acts as an intermediary element between the light guide plate and the lower cover, providing both mechanical fixation and light blocking. It mediates the conflict between bezel reduction and light leakage prevention by incorporating light-blocking capabilities directly into the fixation structure.
Data Source
AI summary
A backlight device according to an exemplary embodiment of the present invention includes, a light guide plate including a convex portion and a recess portion, a lower cover including a lateral surface cover part positioned adjacent to the convex portion, the lower cover surrounding the light guide plate, and a fixing member positioned between the light guide plate and the lateral surface cover part of the lower cover, in which the lateral cover part includes an opening, and the fixing member includes a first hook surrounding the convex portion and a second hook protruding through the opening of the lateral surface cover part.