The first true all-LED flat panel television screen was developed and demonstrated by James P. Mitchell in 1977. It uses an array of light emitting diodes as pixels for displaying videos. 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 “Light Emitting Diode” or LED because it is commonly known as is essentially simply a specialized kind of diode as they need terribly similar electrical characteristics to a PN junction diode. this suggests that associate LED can pass current in its forward direction, however, block the flow of current within the reverse direction.

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