Resin Layer Lighting Device Thickness Reduction
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Solution Overview
Problem
Conventional lighting devices with light guide plates are limited in thickness reduction, flexibility, and light efficiency due to the rigid nature of the plates, leading to design constraints and reduced brightness.
Innovation Solution
The use of a resin layer instead of a light guide plate, combined with a printed circuit board and light reflection units, allows for a thinner design, improved flexibility, and enhanced light efficiency by minimizing light loss and providing a uniform surface light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to guide light from LEDs, then light can be uniformly distributed across the surface, but the thickness of the entire device increases and flexibility is reduced
Solution Approach 1:
The patent removes the light guide plate from the device structure entirely. Instead of using a separate light guide plate component, the invention integrates light guiding functionality directly into the resin layer that encapsulates the LEDs, thereby eliminating the thickness contribution of a dedicated light guide plate while maintaining uniform light distribution
Solution Approach 2:
The patent combines the light guiding function with the resin layer that already serves as an encapsulant and structural element. By integrating multiple functions (light emission, light guiding, and structural support) into a single integrated structure, the device achieves uniform light distribution without requiring additional components that would increase thickness
2Illumination intensity
If a rigid light guide plate is used, then light can be guided effectively, but the device loses flexibility and design adaptability
Solution Approach 1:
The patent employs a resin layer instead of a rigid light guide plate to guide light. The resin layer can be formulated with flexible properties, allowing the device to be bent or conform to different shapes while maintaining effective light guiding performance, thus achieving both light guiding efficiency and device flexibility
3Device complexity
If light is emitted from the side of the light guide plate, then the device structure is simplified, but light loss increases and brightness decreases
Solution Approach 1:
The patent addresses side light loss by incorporating a reflective layer or reflective structures within the resin matrix. Light that would otherwise be lost through the sides of the device is reflected back into the light path, converting a harmful loss mechanism into a beneficial light redirecting feature that improves overall light efficiency and brightness
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
This configuration enables a significant reduction in the overall thickness of the lighting device, improves light reflectance and brightness, and allows for various design implementations, including flexible applications and reduced light loss, while maintaining reliability and uniform illumination.
Implementation Method 1
a resin layer which is disposed on the printed circuit board, in which the light emitting unit is embedded
Implementation Method 2
Light (L) incident to the light guide plate 30 from the LEDs 10 is reflected to an upper part by a minute reflection pattern or a reflection sheet 40
Implementation Method 3
a light reflection unit (160) disposed on at least any one of one side surface and another side surface of the resin layer (150)
Implementation Method 4
a diffusion sheet 31, prism sheets 32, 33
Data Source
Figure 1~2
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Figure 5~6
AI summary
Provided is a lighting device, including: a printed circuit board; one or more light emitting units formed on the printed circuit board; a resin layer which is formed on the printed circuit board, in which the light emitting units are embedded; a diffusion plate formed on an upper side of the resin layer, whereby an entire thickness of the lighting device can be reduced, and when the product is designed, a degree of freedom in design can be improved because flexibility is secured.