Nowadays, thin screen laptop with a crystal clear display is becoming popular. Monitors which have LCD uses the newest technology. They have greater space and energy capacity as compared to that of simple monitors. In order to create an image, these LCD monitors are provided with a backlight on their panel. This backlight which is placed on the panel provides an illumination. This illumination helps to create an image. These LCD’s make use of sheets which contain polarizing material. This material along with liquid crystal solution does not allow the light to pass through them.

This liquid either helps to pass the light or block it. This passing and blocking of light depend on colour filter. As the monitor has thousands of pixels, it depends on the colour of whether the light will pass or not. The biggest drawback that LCD’s monitors have is that their angle is limited. The angle which is set at 180 degrees provides the full vision of the from any side. Because of this angle, the light which passes through the screen of the liquid may cause the LCD’s to lose some brightness. This causes the image quality to decrease.

This problem exists when there is usage of bier fringent materials. It happens when the propagation of light is very critical. This type of problem exists with passive matrix LCD’s. The passive matrix type of LCD’s uses a very old type of technology and is rarely used now. But most pagers and mobile phones uses passive matrix LCD’s. There is another type of matrix which helps to view the screen from all sides and improve image quality. This type of matrix is called an active matrix. For example TFT {thin film transfer}. Today, all desktop monitors use this type of matrix.