Liquid Crystal Display.

Liquid Crystal Display.

1 - The light - emanating from a fluorescent panel located behind the screen of a laptop - it spreads in waves
vibrate in all directions.

2 - a polarizing filter located in front of the light panel, only allows the passage of light waves that are
vibrating more or less horizontally. The fact that a polarizing filter is not completely accurate makes the monitor
create different shades.

3 - In a layer of liquid crystal cells, the internal video card laptop computer applies a variable load
electric current in some cells and no load on the other. In cells with current, larger molecules in
rod shaped material comprising the liquid crystal reacts to the load, forming a helix. The more potent is the
load, the molecules form spirals. With a very strong charge, the molecules from one end of the cell is viewed
90 degrees with respect to the orientation of the molecules of another end of the cell.

4 - The polarized light that enters the cells behind is twisted through the spiral molecules. In cells where it was
a total load applied to the vibrating polarized light emerges with an angle of 90 degrees to its original alignment.
The light that passes through the cells which have no charge emerges unchanged. Cells that received rotate partial load
light at an angle between 0 and 90 degrees, depending on the amount of charge received.

5 - the light emerging from each liquid crystal cell passes through one of the three color filters - red
blue or green - arranged close to each other.

6 - colored light beams pass through a second filter polarizer aligned to allow passage of only
Light waves that vibrate are more or less vertically. The light that passed through the liquid crystal which was applied
total electrical load is perfectly oriented to pass through the second filter.

7 - As the filter is not completely accurate, some of the light waves that passed through the cell with partial load - and that
consequently, were partially torddas - pass through the filter while the others are blocked.

8 - In this stage, the light was not twisted at all when passed through the liquid crystal is completely blocked.
In the example shown here, were issued 100 percent red beam; spent 50 percent of light green and light blue
was completely blocked. The result appears to the human eye as a single point of light brown dimmed.

Note - 0 example presented here shows only one form of such liquid crystals and polarizers manipulates
Light. Some liquid crystal panels using two polarizers with the same alignment, so that the load applied to the
Liquid crystal cell resulting in a light blocked by twisting two methods are also used to carry the
liquid crystal cells. The passive matrix displays use relatively few electrodes arranged on slides in
liquid crystal layer and let the time for the cells to manage receive the correct load. The loads on the monitors
active matrix weaken rapidly, creating faded colors. The active matrix displays, such as the example
shown here have individual transistors for each of the cells, such load transistors provide a more
precise and powerful, giving more vivid colors. But the monitors have an active matrix production more expensive because about 80
percent of them are usually discarded due to malfunction of the transistors.

Source: Evolution of Computers