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Liquid Crystal Display ( L.C.D )
The liquid crystal display (LCD) was invented by George H. Heilmeier, a physicist working for RCA, in 1968. His work laid the foundation for the development of LCD technology that we use in many electronic devices today.
LCD is Liquid Crystal Display and LED is Light emitting diode.
George Heilmeier
An LCD (Liquid crystal display) monitor.
The term "liquid crystal diode" was invented by patent lawyers in late 1970's for the emerging liquid crystal display technology to rhyme with the then dominant light emitting diode display technology. The term is misleading as the liquid crystal cell is not a diode in the ordinary meaning of the word. Since then the incorrect term has been adopted to patents (over 600 patents describing liquid crystal cells as diodes) and scientific literature in addition to its misuse in lay-articles in internet.
Some advantages of a liquid-crystal display are that it is light, compact, has no geometric distortion, used minimal power, thin, has little flicker, and more.
Liquid Crystal Display
DLP is digital light processing and LCD is liquid crystal display.
An LCD (Liquid Crystal Display) uses a backlight source to illuminate the screen and display images. This backlight could be a fluorescent light or LED (Light Emitting Diode) depending on the model and technology used in the LCD display.