The way to make Light Guide Plate (LGP)

The way to make Light Guide Plate (LGP)

There are different ways to make these Light Guide Plate (LGP). V-cutting Technology, Printed Dot either white or black dots, molded microlens or particulates.Each kind of Light Guide Plate will have a different look.The key is to have uniform light extraction from bottom to top so the patterns are less dense at the bottom and more dense at the top to eject the light.

1.V-Cutting Technology

A v-shaped blade creates a grid on the bottom of the panel by etching a series vertical and horizontal lines. The depth and spacing of these lines is done meticulously as to optimize the evenness and the brightness of light released. The vertical V-grooves are widely spaced when they are close to the light source, but narrowly spaced when they are farther away from the light source. The horizontal V-grooves gradually grow wider and deeper as their distance from the light source increases. Therefore, the brightness of the front surface of the LGP is able to remain uniform.

2.Printed Dot

A matrix of fine dots is printed onto the LGP using diffusive ink. These dots help scatter the light emitted from the light source. Dot printing is a quicker and cheaper process then V-cutting however not always the desired method. The major downside to dot printing is that ink is less effective at refracting light and therefore not as bright. Many backlighting applications require a very bright light that dot printing just can`t accomplish.

3.Molded microlens

Molded microlens is almost similar as extrusion LGP, but it can only make small size LGP, and also the cost is more expensive than extrusion LGP.But it`s more flexible because we can adjust the light effect.

4.Particulates

An increasingly popular third method is to add particulates to the resin itself. These minute particles are scattered throughout the panel and reflect light in all directions when combined with a light source. Using diffusion particles is an extremely efficient way to produce a LGP. Although, similar to dot printing, the particulates aren`t able to reflect as much light out of the front of the panel as V-cutting. For certain applications using a particulate infused LGP works well, backlighting printed graphics and for smaller applications for example. If a less transparent diffuser is being used and for larger projects, V-Cutting is almost always the preferred method.

Jiangmen Kunxin New Material Technology Co., Ltd has got over 10 years in Polycarbonate sheets and Acrylic Sheets manufacturing and supplying, and achieve two brand "J.K Optics" and "KunXin plas", which specialize in the optical Acrylic and Polycarbonate diffusion sheet and Textured Acrylic Panel manufacturing separately , has been serving the lighting industry & decoration material market for more than 10 years, products included: Light Diffuser.Optical Diffuser Film & Reflector.Light Guide Plate.Clear Acrylic Sheet.Reeded Or Stripe Acrylic Sheet.Textruded Acrylic Sheet;