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What is an LED display?

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What is an LED display?
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An LED display [Light-emitting diode (LED) based video displays, not a LED-backlighted displays (LED-backlit LCD)] is a flat panel display, which uses an array of light-emitting diodes as pixels for a video display. Their brightness allows them to be used outdoors in store signs and billboards, and in recent years they have also become commonly used in destination signs on public transport vehicles. LED displays are capable of providing general illumination in addition to visual display, as when used for stage lighting or other decorative (as opposed to informational) purposes.

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The first true all-LED flat panel television screen was possibly developed, demonstrated and documented by James P. Mitchell in 1977. Initial public recognition came from the Westinghouse Educational Foundation Science Talent Search group, a Science Service organization. The paper entry was named in the "Honors Group" publicized to universities on January 25, 1978. The paper was subsequently invited and presented at the Iowa Academy of Science at the University of Northern Iowa. The operational prototype was displayed at the Eastern Iowa SEF on March 18 and obtained a top "Physical Sciences" award and IEEE recognition.

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The project was again displayed at the 29th International SEF at the Anaheim Ca. Convention Center on May 8–10. The ¼-inch thin miniature flat panel modular prototype, scientific paper, and full screen (tiled LED matrix) schematic with video interface were displayed at this event. It received awards by NASA and General Motors Corporation. This project marked some of the earliest progress towards the replacement of the 70+ year old high-voltage analog CRT system (cathode-ray tube technology) with a digital x-y scanned LED matrix driven with a NTSC television RF video format.latest company news about What is an LED display?  2

Mitchell's paper projected the future replacement of CRTs and included foreseen application to battery operated devices due the advantages of low-power. Displacement of the electromagnetic scan systems included the removal of inductive deflection, electron beam and color convergence circuits and has been a significant achievement. The unique properties of the light emitting diode as an emissive device simplifies matrix scanning complexity and has helped the modern television adapt to digital communications and “collapse” into its current thin form factor.

 

 

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Pub Time : 2016-09-01 11:30:05 >> News list
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