How to distinguish between light guide plate and diffuser for LED panel lights
May 23, 2021
The panel light diffuser refers to the scattering phenomenon caused by the light passing through other media in the process of advancing, as long as the light from two different media
A to B will inevitably cause light penetration or reflection or absorption due to the hindrance of the refractive index or interference substances, and the penetration part will be caused by dispersion.
There are three physical phenomena in light diffusion.
The light guide plate of the panel light is made of optical grade acrylic/PC sheet, and then uses high-tech materials with extremely high reflectivity and non-light absorption.
Light guide dots are printed on the underside of the optical grade acrylic sheet with UV screen printing technology. Use optical grade acrylic sheet to absorb the light emitted from the lamp
The light stays on the surface of the optical grade acrylic sheet. When the light hits each light guide point, the reflected light will spread to all angles, and then
The destruction of the reflection condition is emitted from the front of the light guide plate. The light guide plate can emit light evenly through a variety of dense and different light guide points. reflection
The purpose of the sheet is to reflect the light exposed on the bottom surface back into the light guide plate to improve the efficiency of light use. Functional differences:
The main functions of the diffuser are:
1. Disperse the luminous flux and make the light evenly distributed (some composite diffusers can control the exit angle in addition to uniform light)
2. Support the backlight structure to protect the optical materials below from damage
The main functions of the light guide plate are:
1. Guide the luminous flux of the point light source of the LED panel light to be evenly distributed across the entire surface. His key role is to guide the distribution of light.
2. Use the reflection mechanism to more efficiently use the luminous flux and control the light distribution.
Differences in application areas:
1. Acrylic light guide plates are suitable for LED lighting fixtures with direct light sources, such as grille lights and high-end aluminum lights.
2. PC diffuser is suitable for side-source LED lighting fixtures, such as flat panel lights, professional film viewers, and is usually used with light guides
3. PS diffuser is mainly used for some low-grade ordinary LED lights.
