LCD screens Invention
The discovery of the LCD screen (Liquid Crystal Display ) cannot be attributed to a single person. An LCD is a thin, flat-screen consisting of a number of colors or monochrome pixels placed in front of a light source or reflector. It is often used in batteries or electronic devices since it uses very small amounts of electrical energy.
These devices are based on the use of liquid crystals (LC). They are materials that do not have a defined melting point. That is to say, below a characteristic value of the temperature, they flow like liquids. But keeping the molecules from each other an arrangement like the one given in the crystals. Its properties are affected by mechanical forces, electric or magnetic fields, chemical environment.
The history of the LCD
In 1888 Friedrich Reinitzer discovered the liquid crystalline nature of cholesterol. It was extracted from carrots That is, two melting points and color generation. With this begins the journey of the history of the LCD.
George W. Gray created and systematized the research and development of liquid crystal materials. This is the key component of LCD screens. He established a molecular design method for its application in its molecular structure. The established properties of liquid crystals. published in 1962.
That same year, Richard Williams, of the American company RCA a new about this. He discovers that liquid crystals have some interesting electro-optical characteristics. This effect is based on electro-hydrodynamic instability. Inside what is now known as ‘Williams domains’ is formed inside the liquid crystal. George H. Heilmeier continued the work of his colleague Williams and was the first to manufacture an LCD screen.
Later, the patent of the LCD screen in Europe (1970) by Wolfgang Helfrich and Martin Schadt is presented. Simultaneously, James Fegason does it in the United States (1971).