Backlight Guide Panel Fixing Device for Slim LCD
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display (LCD) devices, the guide panel tends to detach outwardly from the bottom cover due to weak coupling forces, leading to defects in the backlight unit, especially when a slim design with a narrow bezel and thin profile is required.
Innovation Solution
A fixing device is integrated into the backlight unit, comprising a horizontal portion with protrusion portions and supporting portions made of metal, such as aluminum, to securely attach the guide panel to the bottom cover, preventing shifting and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coupling between the bottom cover and guide panel is strengthened to prevent detachment, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The fixing structure is divided into multiple independent elements: protrusion portions on the bottom cover, corresponding holes in the guide panel, and additional fixing portions with holes. This segmentation allows the coupling strength to be distributed across multiple connection points, improving overall reliability while keeping each individual connection simple.
Solution Approach 2:
The fixing structure utilizes multiple spatial dimensions: the protrusion portions extend in a first direction from the bottom cover, while the fixing portions extend in a second direction (perpendicular to the first). This multi-dimensional arrangement strengthens the coupling without requiring increased complexity in a single direction.
2Length of moving object
If the thickness of the guide panel is reduced to achieve slim design, then the product thickness is reduced, but the guide panel becomes more prone to detachment
Solution Approach 1:
The attachment stability is segmented across multiple connection points (protrusion portions and fixing portions) rather than relying on a single connection. This allows the guide panel to be thinner while maintaining overall attachment stability through the distributed multi-point connection system.
Solution Approach 2:
The fixing structure combines different geometric features (protrusions, holes, fixing portions) to create a composite attachment system that provides enhanced stability even with reduced guide panel thickness.
Data Source
AI summary
Disclosed is a backlight unit and LCD device having a fixing device attached to a bottom cover and a guide panel to prevent the guide panel from shifting and detaching from the bottom cover. The backlight unit comprises a bottom cover having a bottom portion including a first hole, and a side portion having a second hole; a light guide plate on the bottom portion of the bottom cover; at least one optical sheet on the light guide plate; a guide panel adjacent the guide plate and the optical sheet; and a fixing device. The fixing device includes a horizontal portion; and a side portion extending perpendicularly from the horizontal portion. The side portion includes second protrusion portions extending inward from an edge of the side portion and parallel to the horizontal portion, and supporting portions extending vertically from the side portion at distal ends of the side portion.