You may wonder what’s behind the faceplate of LED real estate window displays to light up the whole graphic poster, it is LGP, the name with complete spelling is LED Light Guide Plate, also name LED light diffuser panel, today we detail introduce it from below aspects, see how it works in backlit window displays.
Before start, let’s see the sectional view for a interactive real estate window display. It is composed by FIVE layers just like a sandwich.
- Front plates (double side real estate display boards will with 2 pcs Front plates at the top and bottom separately)
- Graphic poster film
- LGP(light guide plate),LED light diffuser panel
- White reflective light diffuser panel film
- white bottom plate (for single sided window display)
1.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 2000mm, the length is up to 4000mm, 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.
2.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.
3. There are three main types of LED light guide plates: UV silk printing LED light guide plate, laser dot light LED light guide plate, and line engraved LED light guide plate.
The LED real estate window advertising displays by UV silk printing LED diffuser panel has a life of about 2 years , because it is ink printing, no matter how the printing technology is improved, in reality, the printing question still exist in using outside, the temperature changing outside the led real estate sign will make it become yellow little by little, then affecting effect of the picture advertisement at last.
So the Real Estate LED window display is made by laser engraving LED light diffuser guide panel or the line engraved light diffuser plate, the life span will longer, about 10 years.
According to the production process, it can be divided into the following three categories:
1) UV silk screen printing light guide plate: simple production process, low cost and short service life, about 2 years.
2) Laser engraving light guide plate: the production process is complicated, the cost is high, and the service life is long, about 10 years.
3) Wire-cut or line engraved light guide: The manufacturing process is better than the above two, the cost is medium, and the service life is long, about 10 years.
From the perspective of long-term cost performance, it is more advantageous to choose laser engraving light guide plate and wire engraved light guide plate.
In the domestic market, many manufacturers or light guide plate suppliers have chosen UV silk screen light guide plates, because of its simple production process, no deep-level technology, and low cost. besides those advantages, it is really exquisite appearance, uniform illumination, ultra-thin volume, energy saving and stable weather resistance.but weak point still exist, UV silk printing reduce the service life.
Besides the hanging real estate signs, such led light panel also suitable for the round real estate signs, illuminated window signs, all kinds of real estate window decals as a special window vision.