Flexible Lighting Device Resolving Thickness and Light Loss Trade-offs
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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, 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 directly, replacing the rigid light guide plate structure with flexible substrates that enable thin-film construction and bending capabilities
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, enabling the lighting device to be bent and conform to various shapes while maintaining electrical connectivity and light emission uniformity
Solution Approach 2:
The patent transitions from a static rigid light guide plate structure to a dynamic flexible configuration that can adapt its shape, allowing the lighting device to be applied to bent parts and various surfaces
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 the harmful side-emitted light into a beneficial component by using reflective surfaces to redirect previously wasted light back into the useful emission direction, thereby improving overall light efficiency while maintaining wide coverage
Solution Approach 2:
The patent pre-configures reflective surfaces around the LED sources to intercept and redirect light before it is lost, ensuring that light emitted in various directions is captured and redirected to contribute to the overall illumination
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 modifies the thermal parameters of the system by using flexible printed circuit boards with improved heat dissipation characteristics and optimizing the thermal management structure to maintain LED operating temperature within optimal ranges
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 light reflection member formed on at least one of one side surface and another side surface of the resin layer
Implementation Method 2
a resin layer disposed on the printed circuit board so that the light source is embedded
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.