How Does lgp acrylic sheet Work?

Light Guide Plate (LGP) - What it is?

Light guide plate (LGP) is a optical grade acrytlic sheet with variety of  dense and different sizes light guide dots on the surface.
When put light source at the edge of LGP, the light will spread to all angles through the light guide dots, then make the light distribute evenly in the light guide plate.
This technology is the same as is used in the LCD TV displays. 

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The design principle of the LED light guide plate.

The purpose of designing the LGP( light guide plate, LED light diffuser panel) is to transform a line source into a surface source in each backlit real estate signs to lighten up the poster. its back stick with light guide diffuser film as the lighting fixture reflector. 

Based with high quality optical grade acrylic substrate, the LGP using the LCD and the backlight technology,  conduct the high light through the LED light guide point, Refracting the edge lights into a uniform surface light .

Combined with laser engraving or digital printing technology, the LGP was made under a constant temperature, constant humidity and dust-free environment. It has the characteristics of ultra-thin and super bright, uniform light guiding, energy saving and environmental protection, no dark area, durable, not easy to yellow, simple and quick installation and maintenance.

At present, the maximum width of the light diffuser plate can reach mm, the length is up to mm, and the thinnest thickness is only 2mm.

In order to ensure the brightness,  it should increase the LGP thickness correspondingly on the large size display, thus reduce the light diffuser effect correspondingly, and the thickest led diffuser panel does not exceed 20 mm.

The working principle of the LED light guide.

The led light diffuser panel on each led window display is made with optical grade PMMA sheet, it uses a high-tech and high reflectivity(without light absorption)material  to laser-engage the upper light guide point on the bottom surface of the optical grade acrylic sheet of real estate window signs. 

The optical grade acrylic is used to absorb the light emitted from the light source to stay on the surface of the acrylic. When the light hits the respective LED  light guide points, the reflected light will diffuse at various angles, and then the reflection condition is broken out from the front surface of the light guide plate. The light guide plate can be uniformly illuminated by various light guiding points of different sizes and sizes.

The purpose of the reflective paper is to reflect the light exposed from the bottom surface back into the LED light guide panel to increase the light usage.

An LED panel with LGP is a great choice for businesses and organizations that want to make a big impact with their signage. LGP stands for the light guide plate, and it is used in LED panels to direct light evenly across the surface of the panel. This results in brighter, more uniform lighting and allows your graphics to look their best. In this blog post, we will discuss the benefits of using an LED panel with LGP and why you need it for your business!

What is LGP？

Light Guide Plate (LGP) is a transparent acrylic panel made of optical PMMA, PS, or a combination of two resins (then known as MS Materials). It works by directing light from the edges and distributing it evenly across the upper surface of the panel.

Classification of Light Guide Plate

Generally, light guide plate has different classification because of their shape, manufacturing method, and function, but there is no uniform classification at present. After finishing, the classification of the light guide plate is probably as follows

According to the shape: flat and wedge-shaped plate (oblique plate)

Flat: light guide plate from the light into the view of the rectangle.

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Wedge-shaped plate: from the light into the side of the view for a thick side for the thin side of the wedge (triangle) shape.

According to the way the network production: printing and non-printing printing

Printing type: light guide plate to complete the shape of the processing, to print the network printed on the reflective surface。

Non-printing type: the network in the light guide plate forming directly formed on the reflective surface. Also divided into chemical etching (Etching) precision mechanical engraving method (V-cut) light micro-shadowing (Stamper), and internal diffusion.

According to the way of light entry: Edge-lit (lamp and LED) and Direct type

Edge-lit type: the light source (lamp or LED) will be placed on the side of the light guide plate.

Direct type: place the light emitting device (lamp or LED) at the bottom of the light guide plate.

According to the forming production method: injection molding and cutting molding injection

Molding: the application of the injection molding machine will be optical grade PMMA particles using high temperature, high-pressure injection into the mold, Cooling, and forming.

Cutting and forming: The optical grade PMMA sheet is cut through the cutting process to complete the finished product.

The role of the LGP

The light guide plate is the use of optical grade acrylic / PC sheet, and then with very high reflectivity and non-absorbing high-tech materials, the bottom of the optical grade acrylic plate with UV screen printing technology is printed on the light guide dots.

The use of an optical grade acrylic sheet to absorb the light from the lamp to stay on the surface of the optical grade acrylic sheet, when the light is shot to each guide point, the reflected light will spread to all angles, and then destroy the reflection conditions by the front of the light guide plate. And through a variety of sparse, different sizes of light guide points, can make the light guide plate uniform light.

The advantages of LGP

1. Adopt a flexible process, which can be cut at will

The light guide plate can be made in full version, cut and spliced at will, with simple technology and convenient production, or special plate making with individual specifications. The advantages are more and more obvious for products with large production volumes but many specifications. Customers can customize the shape and size according to their products.

2. High-cost performance ratio

Light guide plate light conversion rate is very high, that is to say, in the same area luminous brightness of high luminous efficiency at the same time low power consumption, and in the same brightness can use a thinner product, saving costs. The praiseworthy advantage of the light guide plate is energy saving, and because of the use of advanced light guide plate luminous technology light uniformity, environmental protection, and durable and reliable indoor and outdoor can be applied, the overall performance ratio is very considerable.

Why LED Light Panel need LGP？

The backlight panel is the light source device that is used to ensure that light is emitted from behind the LCD. The principle of LCD backlight is the reflective sheet, light guide, upper and lower BEF, LED strip and adhesive frame iron frame assembled together, LED strip is charged to make the component emit side view light, which becomes plane light after passing through the light guide to provide backlight for the LCD display.

Because the LCD itself is transparent and does not emit light, it requires a backlight panel to assist. The brightness, uniformity, and some other indicators of the backlight panel have a direct impact on the performance of the LCD. Backlight board is actually in the manufacturing process of LCD LCD, in its back plus LED lights and reflectors combination of high brightness luminous body, because the LCD LCD panel does not emit light, can only transmit light, so to add a high brightness luminous body in the back. And the light guide is an essential part of the backlight panel, so in terms of LGP is very important for the LED panel, and can not be missing.

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