LED Lighting Device Resin Layer Light Reflection Member
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Solution Overview
Problem
Conventional LED lighting devices face limitations in thickness reduction, flexibility, light efficiency, and heat dissipation, leading to reduced brightness and increased risk of hot spots due to the use of rigid light guide plates and side emission of light.
Innovation Solution
A lighting device design that replaces the traditional light guide plate with a resin layer and incorporates a light reflection member on the resin layer's surface, along with a diffusion plate and a flexible printed circuit board, to minimize light loss, enhance heat dissipation, and improve design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to uniformly supply light from LEDs, then light distribution uniformity is improved, but the thickness of the entire product increases and flexibility is reduced
Solution Approach 1:
The patent removes the light guide plate from the lighting device structure, extracting the component that causes thickness increase while maintaining light distribution uniformity through alternative optical design approaches
Solution Approach 2:
The patent integrates multiple functions into the remaining components, where the housing and optical elements serve both structural support and light distribution functions, eliminating the need for a separate light guide plate
2Illumination intensity
If a light guide plate is used to guide light from LEDs, then light distribution is improved, but the product becomes rigid and cannot be applied to bent parts
Solution Approach 1:
The patent extracts and removes the rigid light guide plate component, eliminating the source of inflexibility while preserving light distribution functionality through integrated optical design in the housing
Solution Approach 2:
The patent employs flexible housing structures and thin film optical elements that can conform to bent surfaces, enabling the lighting device to be applied to non-planar substrates while maintaining effective light distribution
3Area of stationary object
If light is emitted to the side of the light guide plate, then light coverage area is improved, but light loss increases and light efficiency is reduced
Solution Approach 1:
The patent applies reflective coatings and optical elements on the housing inner surfaces to convert the harmful side-emitted light (which would be lost) into useful illumination by reflecting it back into the light path, thereby reducing light loss while maintaining broad coverage area
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 solution results in a thinner, more flexible lighting device with improved brightness, reduced light loss, and enhanced heat management, preventing hot spots and maintaining consistent illumination.
Implementation Method 1
a resin layer disposed on the printed circuit board so that the light source is embedded
Implementation Method 2
the light guide plate is a kind of plastic molding lens which functions to uniformly supply light emitted from the LEDs
Implementation Method 3
a light reflection member formed on at least one of one side surface and another side surface of the resin layer
Implementation Method 4
a diffusion plate having an upper surface which is formed on the light source module
Data Source
Figure 1~2
Figure 3
Figure 4(a)~4(b)
AI summary
Provided is a lighting device, comprising: a light source module comprising: at least one light source (20) disposed on a printed circuit board (10); and a resin layer (40) disposed on the printed circuit board (10) so that the light source (2) is embedded; a light reflection member (90) formed on at least any one of one side surface and another side surface of the resin layer; and a diffusion plate (70) having an upper surface (71) which is in contact with an upper part of the light source module, and a side wall (73) which is integrally formed with the upper surface (71) and formed to extend in a lower side direction and which is adhered to the light reflection member (90), whereby flexibility of the product itself can be secured, and durability and reliability of the product can be also improved.