Lighting applications or backlighting applications, the light guide plate and the LED lights source with the best in the compatibility of the product quality and poor quality of the light guide plate for the entire LED products have an important impact, the most important performance in the brightness and uniformity. The same module, the light guide plate will have different effects, high-quality light guide plate transmittance significantly than low-quality high, but also to prevent the bright spot, dark areas appear.
The production of light guide material is plexiglass or PC material, but the market is more and are based on acrylic sheet, because it is the most excellent quality so far synthetic transparent material, with unparalleled high brightness, can improve the light use efficiency. Acrylic and then through a series of processing before they can be called the light guide plate, the processing of the main methods of network production.
Speaking of network production, familiar screen printing LGP, a large number of customers because of its low cost and used as a backlight. In fact, countries develop energy-saving environmental protection engineering, screen printing light guide plate manufacturers should follow the development trend of environmental protection, aligned with the environmental protection industry. Below the shortcomings of the production of silk screen light guide plate.
As we all know, the silk screen of the production of the light guide plate can not be separated from the ink, which is produced materials. But the ink is the biggest source of pollution of the printing industry, has reached hundreds of thousands of tons of emissions annually by the ink-induced global volatile organic compounds (VOC) contamination, these volatile organic compounds, the formation of a more serious greenhouse effect than carbon dioxide, and sunlight irradiation, the formation of oxides and photochemical smog, seriously pollutes the atmospheric environment, affect people’s health.
LED products, not only energy saving, long life advantages. Long life is an important feature of the LED products, determine the LED light source, light guide plate is almost decided the life of the entire LED products. LED lighting process inevitably produces heat, heat ink for screen printing light guide plate will have been affected. A test of the industry experts in the use of screen printing LGP LED panel lights, lights for three months, resulting in a nearly one-third of the degree of light failure. This situation resulted mainly due to the lighting process, the heat generated by the LED so that the light guide plate of the ink volatile, deterioration of the stability of the light guide, so contrary to the view of the LED products durable.
In the screen printing process, you must also pay attention to the production environment. Strictly speaking, must be in a clean room for production, clean room is defined as having the air filter, allocation, optimization, structural materials and equipment room, is the basis of pollution control, clean room, the light guide plate of pollution-sensitive ink screen printing can not mass production. Production is completed, the application need to pay attention to the application environment humidity, UV screen printing outlets, rainy and sunny weather will speed up the phenomenon of light failure.
Admittedly, the design of the screen printing network technology is very mature, and the effect on the brightness and uniformity welcomed by many customers, but in view of the complexity of production processes and the requirements on the flatness of the acrylic sheet is very high (screen printing requirements of the acrylic sheet surface very flat, or can not be printed, so they use the extruded sheet, in order to ensure flatness) a lot of companies are beginning to transition to the direction of the laser scribing or laser dot design, this also causes the laser light guide plate products in the market and screen printing light guide plate to compete for market share reasons.