Backlight Unit Reflector Support for LCD Light Distribution
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Solution Overview
Problem
Conventional backlight units for LCDs, particularly those using Cold Cathode Fluorescent Lamps (CCFLs), face issues with high power consumption, low color reproduction efficiency, and environmental pollution, while LED-based units are expensive due to complex driving mechanisms and require a separate light guide plate for efficient light distribution.
Innovation Solution
A backlight unit design featuring a reflector support part with slanted surfaces of different radii of curvature, coupled to a bottom cover with a light source module between reflectors, which enhances light reflection and guidance without a separate light guide plate, improving luminance and reducing costs by using a Light Emitting Diode (LED) as the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a separate light guide plate is used to guide light from LED array to front of display device, then light distribution efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the light guiding function with the bottom cover structure by integrating an air guide into the bottom cover. This eliminates the need for a separate light guide plate, reducing structural complexity while maintaining light distribution efficiency. The air guide is formed as part of the bottom cover assembly, merging multiple functions into a single integrated component.
2Illumination intensity
If LED is used as light source instead of CCFL, then color reproduction efficiency and environmental friendliness are improved, but driving mechanism complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex driving mechanism typically required for LED backlight units. By using a simple bottom cover with air guide structure and reflector support parts, the design removes the need for complex driver circuits and control mechanisms, achieving LED backlighting with simplified driving requirements comparable to conventional CCFL systems.
3Illumination intensity
If reflector support part with slanted surfaces is coupled to bottom cover, then light reflection characteristics are improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the reflector support part with the bottom cover through coupling, creating an integrated structure that improves light reflection characteristics. The slanted surfaces on the reflector support part are designed to work in conjunction with the bottom cover, and their coupling ensures proper positioning and alignment, achieving excellent reflection performance while maintaining manufacturing feasibility through standardized coupling mechanisms.
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 design achieves efficient light distribution and improved luminance with reduced power consumption and environmental impact, making it suitable for high-luminance displays while being cost-effective by integrating the LED light source and eliminating the need for a separate light guide plate.
Implementation Method 1
a plurality of reflector support parts disposed on the bottom cover, each of the reflector support parts including at least two first and second slanted surfaces adjacent to each other about at least one inflection point
Data Source
AI summary
Disclosed herein are a backlight unit and a lighting system including the same. The backlight unit includes a first reflector and a bottom cover, a plurality of reflector support parts disposed on the bottom cover, each of the reflector support parts including at least two first and second slanted surfaces adjacent to each other about at least one inflection point, a second reflector disposed on the plural reflector support parts, and a light source module disposed between the first reflector and each of the second reflector.