| 41. | Such materials are required for anti-reflective coating and photonic devices such as light emitting diodes ( LEDs ) and image sensors.
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| 42. | Because of its perylene-type optical emission in the visible spectrum, it has also been used in organic light emitting diodes.
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| 43. | Light emitting diodes were relatively new at the time and were much dimmer than high efficiency diodes developed in subsequent decades.
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| 44. | Light emitting diodes, or LED's have been around for a long time, used mainly as indicators rather than sources of illumination.
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| 45. | An array of light emitting diodes ( LEDs ) is used to provide white light illumination as well as infrared observation.
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| 46. | When a finger rests on a transparent or gel-like platen, a light emitting diode sends light at an angle off its surface.
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| 47. | The park has two large light emitting diode ( LED ) video displays and one ribbon display in the outfield from Daktronics.
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| 48. | Recent advances in lighting technology have also made available a completely new technology for aquarium lighting : light emitting diodes ( LEDs ).
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| 49. | The first displays to use light emitting diodes ( LEDs ) instead of light bulbs came off of the assembly line in 1996.
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| 50. | A transmitter is often a light emitting diode ( LED ) which is built into the pointing end of the remote control handset.
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