Some articles on leds, led:
Neon Sign - Applications
... applications, neon tubes are increasingly being replaced with LEDs, given the steady advance in LED luminosity and decreasing cost of high-intensity LEDs ... they still have significant advantages over LEDs ...
... applications, neon tubes are increasingly being replaced with LEDs, given the steady advance in LED luminosity and decreasing cost of high-intensity LEDs ... they still have significant advantages over LEDs ...
Light-emitting Diode
... A light-emitting diode (LED) is a semiconductor light source ... LEDs are used as indicator lamps in many devices and are increasingly used for other lighting ... electronic components in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high ...
... A light-emitting diode (LED) is a semiconductor light source ... LEDs are used as indicator lamps in many devices and are increasingly used for other lighting ... electronic components in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high ...
Phosphor - Applications - White LEDs
... White light-emitting diodes are usually blue InGaN LEDs with a coating of a suitable material ... is often used it absorbs the light from the blue LED and emits in a broad range from greenish to reddish, with most of output in yellow ... It has a great potential as a green down-conversion phosphor for white LEDs a yellow variant also exists ...
... White light-emitting diodes are usually blue InGaN LEDs with a coating of a suitable material ... is often used it absorbs the light from the blue LED and emits in a broad range from greenish to reddish, with most of output in yellow ... It has a great potential as a green down-conversion phosphor for white LEDs a yellow variant also exists ...
Viewing Angle - LEDs
... LEDs are measured so that the line along half the viewing-angle from directly forward is half the brightness as at directly forward ...
... LEDs are measured so that the line along half the viewing-angle from directly forward is half the brightness as at directly forward ...
Chroma Key - Background
... use a retroreflective curtain in the background, along with a ring of bright LEDs around the camera lens ... shine on the background other than the LEDs, which use an extremely small amount of power and space unlike big stage lights, and require no rigging ... advance was made possible by the invention of practical blue LEDs in the 1990s, which also allow for emerald green LEDs ...
... use a retroreflective curtain in the background, along with a ring of bright LEDs around the camera lens ... shine on the background other than the LEDs, which use an extremely small amount of power and space unlike big stage lights, and require no rigging ... advance was made possible by the invention of practical blue LEDs in the 1990s, which also allow for emerald green LEDs ...
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