Low-carbon, environment protection is widely considered in production design and daily life. Use a Light Guide Film (LGF) in your dome array will save LED quantity to save power consumption. This is why in recently years most of metal dome array in your cell phone will use LGF.
As most of LED viewing angle is 100-150 Degree and limited to light irradiation rang, even there’re light on the whole dome array area, but the light will be focused on certain area, the area around LED is more bright than other area. You can see from below picture.
So you need to have a extra tooling to diffuse the light to make the it more well-distributed, then a light diffuser is very useful in that situation. Or you can call it “light masking paper”.
You can see this picture showing there’s a piece of light diffuser above each LED and the light irradiation is much better now.
Oooh, you will say “So great”. Maybe you want to know what is made from. In fact, it’s very simple. It is a kind of single sided adhesive peel-off tape with two different colors on top and bottom sides.
The side with adhesive which stick on dome array is white (white is a good reflector), and another side is black (black will not disturb or affect the light irradiation). Here are pictures of them.
The raw material of this light diffuser is a whole sheet so you need to divide it into several small pieces with the size you need. You just peel-off one small of them and put on LED with light press, it’ll be stick firmly on light guide film of dome array. Very easily!
Leave a message if you agree with me, or have some comments.:-)