Thursday, June 11, 2009

LCD Monitors Technology

LCD- Acronym for Liquid Crystal Display is some of the latest advancements made in computer technology. This technology was introduced to computers with notebooks. LCD monitors technology is based on liquid crystal acting like shutters where they allow light to either pass through or block it. LCDs provide finer quality because they there is no alteration from analog to digital.
LCD works/functions in a more unique way than the primitive CRT monitors. An LCD panel consists of five layers.
1. White back light that provides the illumination.
2. Polarizing filter that ensures the light waves from the back light are aligned in one direction.
3. Very small pattern of red, green and blue colors forming one pixel. This layer works as a filter, only allowing light through one of the three colors. The amount of fire power issued controls the “twist”, affecting the amount of light.
4. Actual Liquid Crystal cells. Behind the cells is a grid of wires that can be addressed by x, y coordinates. Your video display controller issues a command to fire at the appropriate coordinates.
5. Another polarizing filter that is perpendicular to layer two.
To simplify, polarized light gets colorized and may or may not emerge from the last polarizing layer depending on the “twist”.
One of the problems with LCD displays is that when viewed from a side angle, the color intensity drops. Different technology is used in creating the pattern alignment to improve viewing from the side. The side angle view quality is one of the things that make a difference in comparing different models.

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