LED Backlight Reflective Structure Without a Light Guide Plate
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Solution Overview
Problem
Existing lighting apparatuses face limitations in reducing thickness and improving luminance without increasing the number of light sources, due to the presence of a light guide plate and limitations in reflectivity and luminance enhancement.
Innovation Solution
A lighting apparatus design that utilizes a reflecting unit with spaced areas on a printed circuit board, incorporating metal and white PET reflective members, and a resin layer to guide light without a light guide plate, enhancing reflectivity and luminance while reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a light guide plate is used to guide light from LEDs, then light distribution is achieved, but the thickness of the lighting apparatus cannot be reduced
Solution Approach 1:
The patent removes the light guide plate from the traditional lighting structure and replaces it with a resin layer having light-guiding properties integrated into the reflective unit. This extraction of the separate light guide component enables thickness reduction while maintaining light distribution functionality through the reflective surface design.
Solution Approach 2:
The patent combines the light guiding function with the reflective unit by integrating a resin layer directly onto the reflective surface. This merging of functions eliminates the need for a separate light guide plate, thereby reducing overall thickness while preserving both light reflection and guidance capabilities.
2Illumination intensity
If the number of light sources is increased to improve luminance, then brightness increases, but device complexity and thickness increase
Solution Approach 1:
The patent changes the optical parameters of the reflective surface by creating spaced areas with different reflectivity characteristics. This allows enhancement of luminance through optimized light reflection patterns rather than increasing the number of LED sources, thereby maintaining simplicity while improving brightness.
Solution Approach 2:
The reflective unit is segmented into spaced areas with different reflective properties, allowing selective enhancement of light distribution and luminance in specific regions. This segmentation enables improved brightness performance without requiring additional light sources, as each segment optimizes the utilization of existing LED output.
3Ease of operation
If a light guide plate is used for illumination, then light distribution is achieved, but the overall thickness of the product is limited by the light guide plate thickness
Solution Approach 1:
The patent replaces the rigid light guide plate with a thin resin layer that provides light-guiding functionality. This thin film approach maintains illumination effectiveness while dramatically reducing the thickness required for the lighting apparatus, enabling thinner product designs without sacrificing lighting performance.
4Illumination intensity
If reflective materials are added to improve reflectivity, then luminance enhancement is achieved, but device complexity increases
Solution Approach 1:
The patent uses a composite structure combining a resin layer with reflective materials in the reflective unit. This composite approach integrates multiple functions (light guidance, reflection, and spacing) into a single integrated component, enhancing reflectivity without proportionally increasing device complexity, as the materials work synergistically within the unified reflective unit structure.
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 improved luminance and reflectivity, reduces the number of light sources, and ensures uniform light distribution by using a reflective unit with spaced areas and a resin layer, thereby minimizing thickness and ensuring optical properties.
Implementation Method 1
a reflective unit including a reflective member made of a metal or a white PET
Implementation Method 2
a resin layer to guide light without a light guide plate
Data Source
AI summary
The present invention relates to a lighting apparatus using LEDs as light sources and a display using the lighting apparatus, particularly, the present invention provides a lighting apparatus including: a plurality of light sources located on a printed circuit board; and a reflecting unit provided on the printed circuit board; and a spaced area provided inside the reflective unit.