Flexible LED Lighting Structure Without a Light Guide Plate
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Solution Overview
Problem
Conventional lighting devices using light guide plates are limited by thickness, flexibility, and light loss, leading to reduced light efficiency and increased temperature issues affecting LED performance.
Innovation Solution
A lighting device design that replaces the light guide plate with a resin layer and incorporates a light reflection member and diffusion plate, using a flexible printed circuit board to enhance heat dissipation and light distribution, while minimizing light loss and allowing for thinner and more flexible designs.
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 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 functionality through alternative means (direct LED arrangement and reflective surfaces)
Solution Approach 2:
The patent employs flexible printed circuit boards to mount LEDs, enabling the lighting device to be bent and conform to curved surfaces, thereby achieving flexibility and thinness without compromising light distribution uniformity
2Illumination intensity
If a light guide plate is used to supply light uniformly, then light distribution is improved, but the material is not flexible and cannot be applied to bent parts
Solution Approach 1:
The patent uses flexible printed circuit boards as the substrate for mounting LEDs, allowing the entire lighting assembly to be bent and adapted to curved surfaces while maintaining uniform light distribution through proper LED arrangement
Solution Approach 2:
The lighting device is designed to be dynamically adaptable to different surface geometries, transitioning from rigid light guide plate configurations to flexible arrangements that can conform to various shapes and contours
3Area of stationary object
If light is emitted to the side of the light guide plate, then light coverage is improved, but light loss is generated and light efficiency is reduced
Solution Approach 1:
The patent converts potentially wasted side-emitted light into useful illumination by implementing reflective surfaces and structures that redirect sideways light back toward the intended illumination area, thereby reducing light loss while maintaining broad coverage
Solution Approach 2:
The patent utilizes three-dimensional reflective structures and multi-layer configurations to redirect light that would otherwise be lost to the sides, effectively adding spatial dimensions to light path management and improving overall light efficiency
4Power
If LED temperature increases during light emission, then light output is improved, but LED characteristics change and reliability decreases
Solution Approach 1:
The patent implements thermal management strategies that actively control and adjust temperature parameters during LED operation, maintaining optimal operating conditions to prevent characteristic drift while preserving high light output
Solution Approach 2:
The patent incorporates thermal feedback mechanisms that monitor LED temperature and adjust operating parameters accordingly, creating a self-regulating system that maintains reliable LED characteristics during high-power operation
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 improves brightness, reduces light loss, and enhances heat dissipation, resulting in a more reliable and flexible lighting solution with improved product design freedom and uniform light distribution.
Implementation Method 1
a resin layer disposed on the printed circuit board so that the light source is embedded
Implementation Method 2
a diffusion plate having an upper surface formed on the light source module
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
using a flexible printed circuit board to enhance heat dissipation
Data Source
AI summary
Provided is a lighting device, comprising: a light source module comprising: at least one light source disposed on a printed circuit board; and a resin layer disposed on the printed circuit board so that the light source is embedded; a light reflection member formed on at least any one of one side surface and another side surface of the resin layer; and a diffusion plate having an upper surface formed on the light source module, and a side wall which is integrally formed with the upper surface and formed to extend in a lower side direction and which is adhered onto the light reflection member, wherein a first separated space is formed between the light source module and the upper surface of the diffusion plate, whereby flexibility of the product itself can be secured, and durability and reliability of the product can be also improved.