Lighting Device Resin Layer Indirect Reflection Heat Dissipation
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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 design constraints, as well as issues with heat dissipation affecting LED characteristics.
Innovation Solution
A lighting device design that replaces the light guide plate with a resin layer and incorporates an indirect light emission unit, a reflection unit with spacing parts, and a diffusion plate to enhance light reflectance and heat dissipation, allowing for thinner, more flexible, and efficient lighting solutions without additional light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to uniformly supply light from LEDs, then light 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. Instead of using a separate light guide plate component, the invention integrates light guiding functionality directly into the housing structure through reflective surfaces and geometric design, thereby eliminating the thickness contribution of the light guide plate while maintaining light uniformity
Solution Approach 2:
The housing structure is designed to serve multiple functions: it provides mechanical protection, defines the device geometry, and simultaneously acts as the light guiding element through integrated reflective surfaces. This multi-functionality eliminates the need for a separate light guide plate component
2Illumination intensity
If a light guide plate is used to supply light, then light distribution is improved, but light loss to the side increases and light efficiency decreases
Solution Approach 1:
The patent converts the previously harmful side-emitted light into a beneficial component by designing reflective surfaces within the housing that redirect this light toward the intended viewing direction. The housing structure incorporates reflection surfaces that capture light that would otherwise be lost and redirect it to contribute to the overall light output, thereby improving light efficiency
3Illumination intensity
If LEDs are disposed in an array on a substrate with a light guide plate, then light uniformity is achieved, but heat dissipation is limited and LED characteristics change
Solution Approach 1:
The patent removes the light guide plate that was contributing to heat trapping in the device structure. By eliminating this component and redesigning the housing with open or ventilated structures, heat can escape more effectively from the LED array, improving thermal management while maintaining light uniformity through the integrated reflective housing design
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 light efficiency, flexibility, and heat dissipation, enabling thinner designs, reduced light loss, and stable brightness while preventing hot spots and wavelength shifts, thus enhancing product reliability and design freedom.
Implementation Method 1
an indirect light emission unit which is formed in at least one of one side and another side of the light source module, and which reflects light irradiated from the light source
Implementation Method 2
a diffusion plate having an upper surface formed on the light source module
Implementation Method 3
a resin layer disposed on the printed circuit board so that the light source is embedded
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 disposed on a printed circuit board; and a resin layer disposed on the printed circuit board so that the light source is embedded; an indirect light emission unit which is formed in at least any one of one side and another side of the light source module, and which reflects light irradiated from the light source; 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 which is adhered onto an outer side surface of the indirect light emission unit, 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 while indirect light emission using a flare effect can be implemented.