• What is the difference between light guide plate and diffusion plate?

In the field of LED backlights and LCD repair parts, light guide plate and diffusion plates are two essential components. These components play a vital role in ensuring uniform light distribution and enhancing the visual experience of an LCD monitor. As a leading company headquartered in Shenzhen, China, we have 8 years of experience in customizing LED backlight and LCD repair spare parts, specializing in the production of a series of key components, including lgp, diffusion plates, prism sheets, polarizers, etc.

Light guide plate:

The light guide plate, also known as the LGP, is a transparent acrylic panel that uses the principle of total internal reflection to evenly distribute light on the surface of the LCD display. The light emitted by the LED light source is introduced into the edge of the lgp, undergoes multiple internal reflections, and is evenly distributed throughout the display area. This results in uniform brightness and illumination, which improves the overall visual quality of the display.

Diffusion plate:

Diffuser panels, on the other hand, are designed to diffuse or scatter light,It sits on top of the lgp and is used to eliminate hot spots and ensure light is evenly distributed across the display. Diffusion panels work by spreading and redirecting light at different angles, thereby reducing glare and enhancing your display’s viewing angles.

The difference between the two:

I Material Aspect difference:
Light guide plate substrate is PMMA/PS/MS. diffusion plate substrate is PC/PS/PMMA.

II Main Function difference:

Light guide panel main function

(1) Guiding the luminous flux of the LED point light source to be evenly distributed throughout the surface, his key role is to guide the distribution of light.
(2) Utilize the reflection mechanism to utilize the luminous flux more efficiently and control the light distribution.

Diffusion plate main function

1) dispersion of luminous flux, so that the light is evenly distributed (part of the composite diffusion plate in addition to homogenization of light, but also can control the angle of emission).
(2) Support the backlight architecture, to protect the optical material below the damage.

III from the appearance.
1, light guide plate: the panel light is the biggest feature of the side of the light, the so-called side light is the light from the side of the lamps and lanterns, incidence light guide plate, after refraction from the front of the light out of the light. So the light guide plate is also the core device of the panel light, if there is no it, the panel light can’t front light.
2, diffusion plate: from the light guide plate out of the light is not very regular, and from the surface of the panel light without diffusion plate is a dense dot, this time the need for a diffusion plate will be uniformly diffused light, diffusion of the effect of the material and the degree of fog has a relationship, at the same time, high fog will also affect the rate of light. In addition, the diffusion plate can also play a role in protecting the light guide plate, the light guide plate is very easy to scratch and sticky dust, so the diffusion plate must be covered in the light guide plate.

In conclusion, light guide plate and diffusion plate are indispensable components in the field of LED backlight and LCD display repair spare parts. It is mainly responsible for guiding and distributing light, while the diffusion plate complements this function by diffusing and softening the light to ensure a uniform and high-quality display.

At our company, we understand the importance of these components in achieving optimal display performance. With our expertise and determination to produce high-quality LED backlight and LCD repair spare parts, we continuously provide customized solutions to meet the specific needs of our customers. Whether it is LGP, diffusers, prism sheets, polarizers or other important components, we are committed to providing excellent quality in all aspects of our optical products.