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Development of LCD technology

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After G.Freidel, LCD research into the trough, it was said that during the period 1930-1960 is a blank period of liquid crystal research. The reason is probably due to the fact that there was no practical application of liquid crystal. However, during this period, the semiconductor electronics industry has obtained considerable development. The LCD can display application, transparent electrode of graphic and LCD and semiconductor integrated circuit microfabrication technology indispensable. Along with the progress of the semiconductor industry, these technologies have become mature.
In 1940s, a interface (P) was developed for the interface (PN), which was made up of the N interface (pnjunction), which was formed by the semiconductor and conduction electrons of the conduction electrons. Prior to this, in the circuit to achieve from the AC to DC rectifier function, to use the diode, and to achieve the amplification function, to use the transistor. These and bulky components can be replaced by semiconductor diodes and transistors, do not need to vacuum electron emission, only in the solid especially thin film can realize rectifier, zoom function, so that to realize the miniaturization of the electronic circuit.
Then, the thin film and micro image of the electronic circuit including diode and transistor are realized by means of optical processing technology. This technique is referred to as the micro shadow (photolithography). In 1960s, with the development of semiconductor integrated circuit (circuit integrated) technology, electronic equipment to achieve a further miniaturization.
The progress of the technology, in a liquid crystal display device (display) is essential for, with the further development of the materials science and materials processing technology, and development of new display mode and drive technology, liquid crystal display technology has obtained the rapid development.
1968, serving the United States G.H.Heilmeier company issued DS (scattering dynamic, dynamic scattering) model of liquid crystal display device RCA. After this, the United States began the first digital LCD watch practical attempt.