LED lights on the pc board's role in 
 LED panel light diffuser (the sun board) 
 Spread use of LED lighting board in the early large-scale use has not before, the commercialization of human beings in order that it can be more when it imported the concept of thin light guide plate technology, has no much attention to energy conservation, and therefore copying the set of TV backlight module ported to the lighting and things take a call on the panel lights terminology. 
 As the direct rays of the slab light produced quite difficult, to LED to a very detailed, for example: vf to a 0.1v sub-block, the color coordinates of the four coordinates of a block difference 0.01 points, they need color separation splitting time with very slow speed operation, but also to packaging manufacturers know how much current to operate, making also need to use the same current, you will increase or decrease the current color coordinates to follow when moving, will not making exactly the same number of lamps in the panel production on these requirements is clearly much smaller, but it uses four or five watt power, the direct illumination is less than half-illuminated panel light, engineers and technicians have found a diffusion barrier efficiency of less than 40% in favor of the second diffuser, it is better than any price on the proliferation of film plus a transparent plate (sun panel). 
 The second diffuser is a reflected diffusion theory, almost transparent in the case without diffusion of light diffusion film directly to complete the task, the side panel lamps lighting the perfect combination of its light transmission rate up to 91% limit of the product side lighting panel light use), secondary diffuser is based on light guide plate (plate thickness and the sun varies a power source, with a number of different diffusion rates for ancillary use, 
 Shield-type diffuser and through the diffuser plate biggest difference is that the former is the most common board bright backlight is on TV), which is light illuminated objects (the most common Flash), shelter type diffuser on the market Two common is the milky white plate, there are two processes, one is adding HIPS to be milky white turbid monomer effect, and the other is to add the right amount of red powder to be spread effects, but these two processes are not suitable for use in the LED Advertising with the diffuser, light transmittance, respectively, only 39% and 33% for fluorescent lamps with a large number of billboards in order to use. 
 LED Bare diffuser is MS monomer to the substrate, with the added polymer molecular diffusion tube directly into the plate with salivation law, the use of multi-level sub-method can be grating to the light within the plate back and forth reflection and refraction, the advertising industry LED light diffusion plate of a dedicated, LED advertising light box is only suitable for production, with high transparency, high light diffusion and optical properties of the suspension of .... and so on, all the light can be focused and stopped in the plate diffusion surface, so that sticker or film looks extra bright lights, play a role in energy conservation. 

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