跳至主要内容

What about Light Diffusing Materials in LED Lamps?

As a China Acrylic Sheet Factory, share with you.
Performance requirements:
The requirements for common LED light diffusion materials are as follows:
High light transmission, high diffusion, no glare, no light and shadow
Light source is better hidden
Good flow processability, dimensional stability, weather resistance, heat resistance
High flame retardant and high impact resistance
Transmittance exceeds 80%
Light Diffusion LED Light
Characteristics of light diffusing materials
The advantage of light diffusing material is that under the premise of ensuring high light transmittance, the light diffusivity and haze of the product are increased. Through the effect of the diffuser plate, the entire plate surface forms a uniform light emitting surface without forming dark areas. Light diffusion plates are currently divided into PC Diffuser Sheet, PMMA light diffusion plate and PS light diffusion plate. However, PMMA is not scratch-resistant and PS has poor heat resistance and flame retardancy. At present, PC materials are used more in LED lampshades.
LED Panel Light Diffuser Sheet
LED Panel Light Diffuser Sheet
Effect of the particle size of tritium diffusion particles
The smaller the particle size, the larger the number of particles in the case of the same mass, the more times the light is deflected when passing through it, the greater the diffusivity generated and the higher the haze. However, if the particle size is too small, it is difficult to control the particle size distribution, which in turn leads to a decrease in transmittance with the same haze. With proper particle size and particle size distribution, the transmittance and haze can reach higher values at the same time. The particle size is generally around 1-5 microns. At the same time, the better the regularity and smoothness of the particles, the better the haze and light transmittance.
Influence of the refractive index of diffusion particles
The refractive index of the substrate and the diffusing agent should not be too large or too small. When the relative refractive index of the diffusing agent is between 0.91-0.97 and 1.03-1.09, the diffusivity and transmittance are better. The relative refractive index is too small, there is not much difference in refractive index between the two, and the scattering is not obvious. Too large a difference in relative refractive index will cause total reflection to occur, reflecting light back into the interior and failing to derive it effectively.
Effect of radon diffusion particle concentration
As the number of light-diffusing particles increases, the number of times that light is scattered in the diffuser plate increases, the back-scattering increases, the free path of the photon becomes smaller, and the haze increases, but the transmittance decreases. Under the condition of ensuring high transmittance and haze, the light diffusion material concentration is reasonably selected, and the general addition amount is within 2%.
Our company provides LED Panel Light Diffuser Sheet, welcome to contact us.

评论

此博客中的热门博文

Plastic Artist-Acrylic Processing Technology

Acrylic can be used casting, injection molding, extrusion, thermoforming, laser engraving, laser cutting and other processes. Casting molding Casting molding for forming plexiglass sheet, bar and other profiles, that is, body-bulk polymerization method of forming profiles. After casting molded products need to be post-processed, post-processing conditions are incubated at 60 ℃ 2 hours, 120 ℃ for 2 hours. Injection molding Injection molding using suspension polymerization obtained pellets, molding in the ordinary plunger or screw injection molding machine. Process parameters include screw injection molding machine, plunger injection molding machine, barrel temperature, injection molding products also need to eliminate the internal stress treatment, processing in the hot air circulation oven at 70 ~ 80 ℃, processing time as the thickness of acrylic products, the general All about 4 hours. Thermoforming Thermoforming is the process of making plexiglass sheets or she...

How much do you know about PMMA Diffuser Sheet?

Background, technical characteristics, principle and application of PMMA diffuser. High Quality PMMA Diffuser Sheet , a material with light diffusing properties, is one of the types of diffuser plates of PS (polystyrene), PC (polycarbonate), PP (polypropylene), etc. The optical characteristics of plastic sheets such as haze, high light transmittance and high diffusivity can effectively convert point or line light sources into soft and uniform surface light sources. Under the premise of achieving good light transmittance, they also have good The light source lattice shielding property is an ideal optical material for solving the secondary light distribution of LED lamp products, and is the best light diffusion material for LED lighting products. PMMA Diffuser Sheet First, the PMMA diffuser produces a background In the process of LED lighting fixtures being gradually accepted by the market, the problem of LED lamp masks has been plagued by lamp manufacturers, which must have h...

Development Background of LED Diffuser Sheet

Led diffuser plate  is an important part from the past to now. Glass was used as the lampshade initially, but the glass was not brittle and the diffusion effect of light was not very good. It was difficult to meet the lighting requirements. Later, it gradually developed to replace glass with resin, but if only transparent resin lampshade, although the light transmittance is high, the basic can reach more than 90%, but the light diffusion effect is not ideal, poor light concealment. The white resin, whose light transmittance is too low, seriously affects the illumination of the LED lamp. In this case, techniques such as adding milky white pigments and surface scrubbing aids are used. Although this solves the issue of light source shielding, there is an excessively low light transmittance, which seriously affects the efficacy of LED lighting. Therefore, the problem of diffusion masks has been plagued by problems. In such a contradictory problem of light rate and light source shieldin...