To trace the source of the LCD, we must start with the birth of "LCD". In 1888 AD, an Austrian botanist, Frederick. Friedrich Reinitzer discovered a special substance. He extracted from the plant a compound called heliotropin, which unexpectedly found that the compound had two melting points at different temperatures when heated for this compound. And its state is between our well-known liquid and solid substances, a bit like soapy water colloidal solution, but it has in a certain temperature range of both liquid and crystalline nature of the material, but also because of its unique State, then named it "Liquid Crystal", is the meaning of liquid crystal material. However, although the liquid crystal was discovered as early as 1888, it was only 80 years since the real thing was used in life.
In 1968, at the Sanof R & D center of RCA (the inventor of radio and television) in the United States, engineers found that liquid crystal molecules were affected by the voltage and changed their molecular arrangement and deflected the incident light The phenomenon. Using this principle, RCA invented the world's first LCD screen. Later, liquid crystal display technology is widely used in general electronic products, such as calculators, electronic watches, cell phone screens, instruments used in hospitals (due to radiation measurement considerations), or digital cameras above the screen and so on. Interestingly, liquid crystal discovery earlier than the vacuum tube or cathode ray tube, but the world is not aware of this phenomenon is not much until the first book in 1962, by the RCA research chemist Joe. Described by books published by Mr. Joe Castellano. And the same with the image tube, although the two technologies are invented by the RCA company in the United States, respectively, but by Japan's Sony and Sharp (Sharp) to carry forward the two companies.