Thames & Kosmos Crystal Nightlight handleiding

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Thames & Kosmos

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Handleiding

The transparent plastic dome protects the

components inside the LED. The round shape

distributes the light well.

A thin connection wire, also called a bondwire,

connects the crystal (4) to the positive terminal.

Some LEDs also have another wire leading to the

negative terminal, while others have the crystal

mounted directly on the negative terminal.

A small concave mirror also helps to distribute

the light.

A tiny semiconductor crystal is the most

important component in the LED. It emits light as

soon as current ﬂows through it.

Two metal brackets serve as electrical terminals.

The ﬂattened area marks the negative terminal.

Connection to the positive terminal (long leg).

Connection to the negative terminal (short leg).

GEEK

OUT!

How does an LED work?

Inside an LED, there is a tiny piece of artiﬁcial crystal. Two thin layers

of the crystal are treated with two different electrically conductive

materials. You can think of it in terms of foreign particles getting

smuggled into the crystal. It looks something like the image below.

If an electrical current is connected to both layers, the crystal starts

to glow where the two different layers meet. The light is able to penetrate

the upper layer and

shine out, since the

crystal is really thin.

LEDs glow in

different colors

depending on the

material used to make

the crystal.

Rays of light

Connection

to positive

terminal

Connection

to negative

terminal

Foreign

particles

First

treated

layer

Glowing

boundary

layer

Second

treated

layer

Untreated crystal

HOW IS AN

LED MADE?

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