Explain basic working principle of LCD with diagram?

Answer 1

Placing liquid crystals between two surfaces that are smooth grooves. Smooth grooves on the surface make an angle of 90o a (perpendicular) with smooth grooves on another surface. If the molecules are arranged on one surface from north to south and one molecule on the other surface leads from west to east, there are molecules of which will be forced to rotate 90o. As a result, the path of light that followed the structure of this molecule also rotates 90 ° when passing through the liquid crystal. When electricity stress supplied to the liquid crystal, molecules will arrange themselves vertically lets light to pass through without turning 90o.

b. Rely on the polarization properties (is a collection of very fine parallel lines). Through this polarizing filter, the light from background sources is filtered and then rotated by the liquid crystals and is filtered again before exiting.

Answer 2

The molecules of the liquid will be oriented by the applied electric field.

This orientation of molecules would help scattering light in greater proportion and thus the intensity would vary. This is one technique.

There is another technique. Because of the particular orientation of the molecules, incident light would be polarised and by using some polarizing filters light may be absorbed or passed through.

Hence, the signal to be displayed would be in the form of varying electric field which in turn change the orientation of the molecules. So, the above said scattering technique and absorption technique would make the corresponding display on the screen.

The most advantage of LCD is, the screen will be a flat surface which can be hung on the wall as a calendar.

Answer 3

LCD's basically change their color state when voltage is passed through them. By applying or not applying a small voltage to the small pixel, it can show dark or light. With proper lighting, the various colors are displayed.

Answer 4

A liquid crystal display (LCD) is a thin, flat panel used for electronically displaying information such as text, images, and moving pictures. Its uses include monitors for computers, televisions, instrument panels, and other devices ranging from aircraft cockpit displays, to every-day consumer devices such as video players, gaming devices, clocks, watches, calculators, and telephones. Among its major features are its lightweight construction, its portability, and its ability to be produced in much larger screen sizes than are practical for the construction of CRT display technology