Yakri Crafts CO.,LTD

 The process of light guild panel  (LGP)include silkprinting , carving style , chemical etchiung, direct injection methd . And here ,we tell about the difference of these different technics as follows:

Silkprinting :

After the process ,the surface of LGP is silk printed by ways of grid . The material of grid silk printed effect the role of refraction and reflection of light. Which means the light going from the side of light guild panel  would be changed into a flat light due to these dots . Although the production process need high technologies, yet the production cost is low and also it has the dual effect of light refraction and high reflectivity, the brightness is very good . what is more , this method is suitable from small size to large size light guild panel . Therefore , such process method is a prior consideration for ultra slim crystal light box in advertising industry . Compared to other methods , Light refraction effect is somewhat less than the non-printed the first three, but it feature high reflectivity which can make up .this disadvantage.

 

Carving style .

 

Such method is finished by engraving machinery in the surface of the acrylic plate engraved with the groove or concave hole lattice. When the light is fired In from the side of the acrylic sheet, these trough or concave hole lattice produce the role of light refraction light plane refracted into a plane of light. Through the way of engraving , it has better refraction of light and good brightness ,but the investment is large. Although the production process is simple, the production efficiency is low, the strength of the sheet after the carving will be destroyed, trough or concave holes may store the dust.

 

Chemical etching method.  

 

one Mold should be firstly made according to the size of the backlight . Through the combination of mold and acrylic sheet and by ways of chemical corrosion, the acrylic plate is generated into grid. Its working principle is nearly the same as carving method. Refraction of light is better, brightness is good and investment is large Different size of products need different Mold . Once these Mold is confirmed , the size of grid can’t be modified . So Mold must be a success, or scrapped. The production process is a little difficult to be grasped. Such technical is mainly suitable for small liquid crystal display backlight products.

Direct injection method

 

The grid are designed on injection mold according to the size and thickness of the backlight, the PMMA granule are directly produced into light guild panel through injection molding. The working principle as above. Refraction of light is better,  brightness is good and Investment is large. Different size products need different mold. And alsothe cost of plastic mold is costly. Once the Mold is finished ,the size of grid can’t be modified .

 
These light guide material powder which feature refraction and reflection are mixed in PMMA colloidal. And PMMA rubber is hot melt and then poured into the ready Mold, after cooling and finally become the light guide plate. The working principle is very similar to silk printing method .. Planar optical uniformity better. The underside of the points with the production of the light guide plate, the light is almost an average of both sides of refraction, although one side of reflective paper, but the brightness is still lower, investment, technology is a bad master.
 
    Question 1:

Which terms of light guild panel is more bright for silk printing and carving method ? 

    In fact, the brightness of the two is the same, the formula of the printed material of the light guide plate light guide outlets not only to light refraction, as well as high reflectivity. Light guide ink refraction of light and highly reflective double, and from the printing process further improved outlets to light refraction effect and carving board does not make any difference, while the trough or concave carving board Kong only a single dot of refraction.
    

    Question 2:
Which one is more long life for printed light guide plate and non-print-type light guide plate?

   Respecting the Lifespan on the printed light guide plate and non-print-type light guide plate, actually there isn’t one certain comments in the commercial promotion industry ,every one has their own opinion .

 
However, no matter what method of production of the light guide plate life , it depends on the quality of acrylic sheet. Obviously , the life-span of yellow acrylic sheet is short , which no-yellow acrylic sheet is much longer , it is nothing to do with the mode of production. Some people say that the light ink of the printing light guide plate in the course of aging effect of failure of the light guide for this problem, we think, in their daily lives are inseparable from the daily print things, electrical panel, text, cell phone button numeric, if you do not touch it, touch it, scratch it, five or ten years ... not going to change, will not fall, the outlets of the printing light guide plate ink is the same reason, the composition of substances contained in the ink of the light guide is a nature very stable inorganic, not air any chemical reaction, In other words, even if the acrylic board yellowing deterioration LGP characteristics of the halftone printing remains unchanged, Thus printed light guide plate and non-print-type light guide plate is as long as life.