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2. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   By selection of different semiconductor materials, single-color LEDs can be made that emit light in a narrow band of wavelengths from near-infrared through the visible spectrum and into the ultraviolet range. The required operating voltages of LEDs increase as the emitted wavelengths become shorter (higher energy, red to blue), because of their ...

3. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   LED development began with infrared and red devices made with gallium arsenide. Advances in materials science have enabled making devices with ever-shorter wavelengths, emitting light in a variety of colors. LEDs are usually built on an n-type substrate, with an electrode attached to the p-type layer deposited on its surface.

4. Infrared lamp - Wikipedia

   en.wikipedia.org/wiki/Infrared_lamp

   Remote controls and IrDA devices use infrared light-emitting diodes (LEDs) to emit infrared radiation which is focused by a plastic lens into a narrow beam. The beam is modulated, i.e. switched on and off, to encode the data. The receiver uses a silicon photodiode to convert the infrared radiation to an electric current. It responds only to the ...

5. File:LED, 5mm, green (en).svg - Wikipedia

   en.wikipedia.org/wiki/File:LED,_5mm,_green_(en).svg

   The following other wikis use this file: Usage on bs.wikipedia.org Svijetleća dioda; Usage on ckb.wikipedia.org ئێڵ ئی دی; Usage on en.wikibooks.org

6. SMD LED - Wikipedia

   en.wikipedia.org/wiki/SMD_LED

   A single multicolor module may have three individual LEDs within that package, one each of red, green and blue, to allow many colors or shades of white to be selected, by varying the brightness of the individual LEDs. LED brightness may be increased by using a higher driving current, at the cost of reducing the device's lifespan.

7. Standard illuminant - Wikipedia

   en.wikipedia.org/wiki/Standard_illuminant

   CIE Publication 15:2018 introduces nine new illuminants representing several white LEDs with CCTs ranging from 2700~6600 K. [28] LED-B1 through B5 define standard LED illuminants with phosphor-converted blue light. LED-BH1 defines a blend of phosphor-converted blue and a red LED. LED-RGB1 defines the white light produced by a tricolor LED mix ...

8. Electro-optical sensor - Wikipedia

   en.wikipedia.org/wiki/Electro-optical_sensor

   These sensors are able to detect electromagnetic radiation from the infrared down to the ultraviolet wavelengths. [1] They are used in many industrial and consumer applications, for example: Lamps that turn on automatically in response to darkness; Position sensors that activate when an object interrupts a light beam

9. Infrared Data Association - Wikipedia

   en.wikipedia.org/wiki/Infrared_Data_Association

   To drive the LED, a computer-controlled pin is turned on and off at the right time. Cross-talk from the LED to the receiving PIN diode is extreme, so the protocol is half-duplex. To receive, an external interrupt bit is started by the start bit, then polled a half-bit time after following bits.