As is well known, the light guide plate and diffusion plate are indispensable in LCD screens. Today, the editor will introduce how to distinguish between light guide plates and diffusion plates. The editor has compiled a few points, hoping to be helpful to you.

Firstly, from a material perspective
The substrate of the diffusion plate is PC, and the substrate of the light guide plate is PMMA (acrylic).
Secondly, from a functional perspective
The main function of a diffusion plate is to open up the flux of light, distribute it evenly, and control the angle of emission. Secondly, it supports the backlight structure to protect the underlying optical materials from damage.
The main function of the light guide plate is to guide the uniform distribution of the luminous flux of the LED point light source on the entire surface. Its main function is to guide and distribute light, followed by utilizing light flux and controlling distribution with higher efficiency through reflection.
Thirdly, from the appearance.
The diffusion plate is used for straight down modules. Light enters the diffusion plate from the back of the panel, and the diffusion plate evenly diffuses the light.
The light guide plate is used for side entry modules, which means that light enters the light guide plate from the side of the panel, and after refraction, comes out from the front of the lamp. Therefore, the light guide plate is also the core component of the panel light. Without it, the panel lights cannot emit forward.