Lighting Device Resin Layer Optical Plate Haze Control
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Solution Overview
Problem
Conventional lighting devices using light guide plates are limited by thickness, flexibility, and light efficiency due to the material's properties, leading to reduced product design freedom, increased thickness, and light loss, as well as issues with heat dissipation and wavelength shift.
Innovation Solution
A lighting device design that replaces the light guide plate with a resin layer and incorporates a light reflection member on the resin layer's surface, featuring an optical plate with a haze of less than 30% to enhance light efficiency, reduce thickness, and improve heat dissipation, while allowing for flexible product design and various lighting effects.
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 the material is not flexible
Solution Approach 1:
The patent extracts the light guide plate from the lighting device structure, replacing it with a diffuser plate that has light-diffusing particles distributed throughout its thickness. This removal of the light guide plate reduces product thickness while maintaining light distribution uniformity through the diffusing particles in the diffuser plate.
Solution Approach 2:
The patent changes the optical parameters of the diffuser plate by controlling the size, shape, and distribution of light-diffusing particles within the plate. By adjusting these particle parameters, the diffuser plate achieves effective light diffusion without requiring the thickness of a traditional light guide plate, thus reducing overall product thickness.
2Illumination intensity
If a light guide plate is used to supply light, then light distribution is improved, but the material rigidity limits flexibility and design freedom
Solution Approach 1:
The patent removes the rigid light guide plate and replaces it with a diffuser plate containing light-diffusing particles. This substitution enables the lighting device to achieve flexible shapes and conform to curved surfaces while maintaining uniform light distribution through the particle-based diffusion mechanism.
Solution Approach 2:
The diffuser plate is designed as a thin, flexible component with light-diffusing particles distributed throughout. This flexible structure allows the lighting device to be bent and shaped according to design requirements, providing adaptability to various installation surfaces while maintaining light diffusion performance.
3Illumination intensity
If a diffuser plate with haze greater than 50% is used, then light diffusion is improved, but light efficiency decreases and thickness increases
Solution Approach 1:
The patent optimizes the parameters of light-diffusing particles, including their size (0.1-10 μm), shape (spherical, irregular, or rod-like), and concentration within the diffuser plate. By carefully controlling these parameters, the diffuser plate achieves effective light diffusion with haze between 10-50%, maintaining high light efficiency while avoiding the need for high-haze (>50%) thick diffuser plates.
Solution Approach 2:
The diffuser plate is constructed as a composite material consisting of a transparent or translucent base material (such as PMMA, PC, or PDLC film) with dispersed light-diffusing particles. This composite structure enables effective light diffusion through particle scattering while maintaining high light transmission efficiency, avoiding the light loss and thickness issues associated with high-haze homogeneous diffusers.
4Illumination intensity
If a light guide plate is used, then light distribution is improved, but heat dissipation becomes problematic due to the material properties
Solution Approach 1:
The patent removes the light guide plate, which has poor heat dissipation properties, and replaces it with a diffuser plate that allows for improved thermal management. The diffuser plate structure, combined with direct LED mounting on a heat-dissipating substrate, enables more efficient heat removal from the LED sources while maintaining uniform light distribution through the particle-based diffusion mechanism.
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 minimizes light loss, enhances brightness and reliability, and allows for thinner, more flexible lighting devices with improved heat dissipation and design freedom, achieving efficient light distribution and stability in illumination.
Implementation Method 1
a light reflection member which is adjacent to at least one of one side surface and the other side surface of the resin layer
Implementation Method 2
an optical plate comprising a side wall which is closely adhered to the light reflection member, and an upper surface which covers an upper part of the light source module, wherein a haze of the optical plate is less than 30%
Data Source
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AI summary
Provided is a lighting device, including: a light source module comprising at least one light source (20) on a printed circuit board (10), and a resin layer (40)in which the light source is embedded; a light reflection member (90) which is adjacent to at least any one of one side surface and the other side surface of the resin layer; and an optical plate (70) comprising a side wall (73) which is closely adhered to the light reflection member, and an upper surface (71) which covers an upper part of the light source module, wherein a haze of the optical plate is less than 30%.