How does multy colour lead work?
Answers: "OK, I bought one of these, and can now further describe how it works. It apparently consists of 3 LEDS - one red, one green, and one blue (RGB) - or possibly one LED that can function contained by three modes.
The red one produces a stripe of light from the red closing of the spectrum - from about 670 nm (the approximate restrain of human vision on the red end) to something like 620 nm (orange part of the spectrum). It appears to apex at about 650 nm. Using an infrared filter and a special sensor (a video camera), I be not able to see much of an IR signal (whereas a conventional incandescent flashlight does hold one).
The green one produces light from in the order of 600 nm (orange) to about 520 nm (aqua), beside a peak at roughly speaking 550 nm (green).
The blue one produces light from roughly 470 nm (blue) to about 530 nm (greenish), near a peak roughly 480 nm (blue). It appears to be missing a violet component (450 nm), so it may be designed to cut past its sell-by date before it get too far into the ultraviolet (probably a good thing).
The other colors (including white) are created by mixing these three chief RGB colors in varied ratios. This is done apparently by speedily switching between the colors (for some reason, it does not frothy up any 2 of the RGB colors simultaneously). This phenomenon can best be observed by setting the flashlight to one of these mixed colors (e.g, white) and moving the flashlight around quickly and looking at the bulb - you will see the colors near your eyes. Many computer projectors use a similar technique to create color on the screen."
I assume you are referring to a reverse projection Digital Light Processor (DLP) the uses Light Emitting Diodes (LED) for a light source instead of the soaring power and very hot and expensive mercury vapor arc hurricane lantern.
First, you need to think through how rear projection DLP TV’s function. Find out here:
http://en.wikipedia.org/wiki/DLP
Samsung have developed a DLP Rear Projection TV that uses LED light source instead of an mercury vapor arc oil lamp and Red-Blue-Green color wheel.
The use of LEDs instead of a light increases picture quality by reducing “rainbow effect”, providing a fuller spectrum of perceptible light, reducing bake, increasing life span, reducing power consumption, and so on.
The answers post by the user, for information only, CeQnA.com does not guarantee the right.
Related Questions :