Backlight Unit Protrusion Mounting for LCD Luminance Uniformity
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Solution Overview
Problem
Existing liquid crystal display backlight units face issues with light source efficiency due to protruding portions that cause luminance differences and potential damage from contact with light guiding plates, particularly when using LED light sources.
Innovation Solution
The implementation of a bottom cover with protruding portions and concave portions to securely couple and support the LED assembly, light guiding plate, and reflector, preventing contact and enhancing reliability by optimizing the mounting structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spacers or guide protrusions are provided to prevent contact between light guide plate and LEDs, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the support function and the contact prevention function into a single integrated protrusion structure on the bottom cover. This eliminates the need for separate spacers and guide protrusions, reducing device complexity while maintaining reliability through the unified design that simultaneously supports the light guide plate and prevents LED contact.
2Reliability
If multiple separate components (spacers, guide protrusions, adhesive tapes, screws) are used to support and fix components, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple support and fixation functions into a unified protrusion structure on the bottom cover that simultaneously supports the LED assembly, supports the light guide plate, and prevents contact between components, eliminating the need for multiple separate components.
Solution Approach 2:
The protrusion structure on the bottom cover performs multiple functions: supporting the LED assembly, supporting the light guide plate, and preventing contact between components, making a single structure multi-functional and reducing overall device complexity.
Data Source
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AI summary
A backlight unit and a liquid crystal display including the same are provided. The backlight includes a light guiding plate (1031), a reflector, and at least one LED assembly (1020) including an LED light source (1021), a substrate (1022), and a support plate (1023). A plurality of protrusions (1025) formed on a back cover (1050) of the liquid crystal display are configured to mate to a plurality of concave portions (1032) formed on the light guiding plate (1031), the reflector, and the LED assembly (1020) to mount the various components of the liquid crystal display onto the back cover (1050).