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bi-color LED

Two-color LEDs are the same light-emitting diodes as single-color LEDs, with the difference that two LEDs with different colors are housed in one package

. They have the same characteristics and parameters as single-color LEDs. This refers to the brightness values, the

radiation range

, the

service life

and all other LED characteristics.Bi-Color LEDs can have two or three connection wires, depending on how they are wired internally. In the two-wire version, the two LEDs are connected in parallel, but in the opposite direction. In this case, the anode of one light-emitting diode, for example a red LED, is connected to the cathode of the second LED, for example a green LED. If no voltage is applied to the parallel circuit, the LEDs remain dark, and the same applies if the same positive voltage is applied to both connecting wires. If there is a positive voltage at the anode of the red electrode that is higher than the breakdown voltage, then it lights up red. If the polarity of the voltage is reversed and there is a positive voltage at the anode of the green LED, then it lights up green

.

Switching states of a bi-colour LED with two terminals, Photo: Respotec

Switching states of a bi-colour LED with two terminals, Photo: Respotec

The colour combination of bi-colour LEDs is varied and ranges and includes the complete colour palette of red, green and blue

in the most diverse forms: Red/green, red/orange, red/blue, etc. Bi-color LEDs are used where two states need to be indicated. The situation is different with three-colour LEDs, the tri-colour LEDs. They can be used to display a wide range of colors by controlling the brightness of the red, green and blue LEDs.

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Englisch: bi-color LED
Updated at: 31.12.2020
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Translations: DE