With the increasing requirements for finished LED lamps, compared to traditional tempered frosted glass, LED light guides and diffusers have become hot due to high light transmittance and fresh market selling points.
At present, the mainstream diffuser plates on the market are made of PMMA, PC, PET, etc., but this is only one of the criteria for determining the effectiveness of the diffuser. The different types of LED light sources, the distance between the light source and the diffuser are the basis of choice. If you subdivide according to this, plus the material and thickness, the diffusion plate can be matched with dozens of solutions, especially in Zhongshan. In a complex market, the various metrics are more difficult to unify. The most used at this stage is the PC material. As for why PS material is the favorite of the major flat panel manufacturers, I will open it for you!
PC light diffuser foundation
Concept: A light diffusing plate is a diffusing layer of light passing through a substrate such as PC/PMMA/PS. When a medium (diffusion particle) different in refractive index is encountered, multi-angle, multi-directional refraction, reflection and scattering occur. Phenomenon, thereby achieving a light diffusing effect, providing a uniform surface light source for the display illumination assembly.
Light diffusing plate produces background: In the process of LED lighting gradually being accepted by the market, the problem of the lampshade has always plagued the lamp manufacturer. It is necessary to have a high light transmittance as a premise, and at the same time, it has to have a relatively high light diffusivity and good light source concealability. The glass was originally used to produce the lampshade. The problem with the glass was that it was fragile, and the light diffusion effect was not very good. It was difficult to meet the lighting requirements and use it immediately. Later, it gradually developed to replace the glass with resin. If only the transparent resin is used as the lampshade, although the light transmittance is high, it can basically reach more than 90%, but the light scattering effect is not ideal, and the light source concealing performance is poor. Whiteboard resin, which has a low light transmittance, seriously affects the illumination of LED lights.
Theoretical basis: When light strikes a smooth interface from one medium to another, part of the light is reflected by the interface, and another part of the light is refracted through the interface in the other medium. The angle of incidence of light is equal to the angle of reflection, and the reflected light is on either side of the normal in the same plane as the incident light. This is the law of reflection. The refracted light conforms to the law of refraction: the refracted ray is in the plane of the incident light and the normal, the refracted light and the incident light are on both sides of the normal, and the ratio of the incident angle to the sine of the angle of refraction is a constant. Both the law of refraction and the law of reflection are the basis of geometric optics. They not only lay the foundation for theoretical research, but also for the development of optical technology and the design of optical products.
PC light diffuser features
The light diffusing plate (DF plate) has the advantages of increasing the light diffusivity and haze of the product under the premise of ensuring high light transmittance, and the entire plate surface forms a uniform light emitting surface by the action of the diffusing plate. The dark area is formed, and residual images are formed on the screen to make the picture more realistic and achieve a transparent and transparent visual effect. At present, the light diffusing plate is divided into a PC light diffusing plate, a PMMA light diffusing plate and a PS light diffusing plate.
The transmittance of PC light diffusing plate can reach more than 80%, while the light transmittance of ordinary grade white PC board is only 20%. Therefore, it is widely used in the advertising light box industry. Ordinary graded white PC boards can only be penetrated by light, but they do not function as uniform astigmatism, and light diffused PC boards can fully scatter LED light sources.
PC substrate has excellent impact resistance, 20-30 times of acrylic sheet, and is not easily damaged during installation and transportation.
The PC diffuser has a flame retardant rating of B2 and a higher safety performance.
PC has a specific gravity of 1.2 and weighs only 1/2 of ordinary glass, so it can be used for construction and reduce transportation costs.
The temperature resistance is -40-120 degrees Celsius and will not be deformed due to long-term illumination of the light source.
Comparison of some data of diffusion plate physical properties
PC light diffuser application field
The diffuser is suitable for LED lighting fixtures with direct light sources, such as downlights, grille lamps, and high-grade aluminum lamps.
The diffuser is suitable for side-light LED lighting fixtures, such as flat panel lights, advertising light boxes, professional viewing lights, and usually used with light guides.
PC light diffuser application range
For home theater, hotels, dance halls, night clubs, KTV boxes, concert halls, multi-purpose halls, studios, recording studios, theaters, offices, conference rooms, indoor stadiums, libraries, exhibition halls, classrooms, training centers, interrogation Room...etc. indoor place.
Led Strip Connector is connected between the light bar, light bar is constantly presenting various lengths an accessory. Usually, by the light of the width divided into several types of connection fittings.
LED Strip Connector can be divided into waterproof and not waterproof, single and porous.
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