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How to Choose the Light Guide Plate for LED Ultra Thin Light Box?

LED ultra-thin light boxes are generally used for light guide plates, but light guide plates can be divided into various types: laser dot matrix light guide plates, engraving scribe plates, silk screen light guide plates, etc. Next, let's briefly introduce these light guides.


1. The screen printing light guide plate of LED ultra thin light box


After the acrylic sheet has been processed, the light guide points are printed on the surface by screen printing. The material of this dot has the ability to refract and highly reflect light, and can change the direction of light emitted from the side to flat light.


It has the dual effect of high refraction and high reflected light, and has good brightness. The production process of the silk-printed light guide plate of the LED ultra-thin light box is simple, easy to master, and the production cost is low. The light guide plate of small to large size can be flexibly produced. the best material.


2. Engraving light guide plate of LED ultra thin light box


The engraving machine is used to engrave grooves or concave and convex lattices on the surface of the platen. When light is injected from the side of the platen, these slits or cells create the effect of refracting the light into the plane and refracting the light into a plane.


The light refraction effect is good, and the brightness is good. The investment is large, the production process is difficult to master, the production efficiency of the engraved light guide plate of the LED ultra-thin light box is low, the strength of the engraved plate will be destroyed, and the dust will be stored in the lines or holes.


3. Chemical etching method of LED ultra thin light box


According to the size of the backlight source, the mold made of dots is chemically etched to the platen, and the working principle is the same as the above. The refraction effect of light is better, and the brightness is better. Products with large investment and different sizes should have different molds.


After the mold is formed, the size parameters of the dots cannot be modified. Otherwise, it is difficult for the opening of the ultra-thin LED light box to be successful at one time, the production process is difficult to master, and the large light guide plate is difficult to manufacture. The method is mainly aimed at the backlight light source products of small liquid crystal displays.


4. Direct injection molding of LED ultra thin light box


According to the size and thickness of the backlight product, design points on the injection mold, and inject the PMMA rubber particles directly into the light guide plate through the injection molding machine.


The working principle is the same as the printing type, and the plane light uniformity is good. The LED ultra-thin light box light guide plate produced by this method has no bottom surface, and the light is refracted to the average two sides. Although the reflective paper can be attached to one side, the brightness is still low, the investment is large, and the direct injection molding process of the LED ultra-thin light box is not easy to master.


Jinyu New Materials (Shanghai) Co., Ltd. LED ultra-thin light box uses high-quality LEDs that produce maximum LUX and minimal degradation over time. If you need help finding the Slim LED Light Box for your needs, please email us and let our experts guide you to the perfect solution.