rhythm of life in technology

Flat Screen Television Display

Unlike a curved screen television, a flat screen television display produces fewer reflections, thus you enjoy distraction-free viewing, no matter where you are seated in the room. A flat screen television need not necessarily have a flat panel display. Common CRT televisions can also have flat screens.

(Liquid Crystal Display)LCD versus Plasma Television Display:

The basic idea of display in plasma television is to illuminate tiny colored fluorescent lights to form an image. The very first prototype for a plasma display monitor was invented in July 1964 at the University of Illinois by professors Donald Bitzer and Gene Slottow, and then graduate student Robert Willson. Bulky Cathode Ray Tube televisions were the standard for over fifty years. A flat panel television is even thinner than a photo album. A flat panel television struggles in the confusion of selecting one of the two technologies:(Liquid Crystal Display) LCD versus Plasma Television . The picture elements (pixels) are controlled individually. Each pixel in a color image is made up of a red, green, and blue component, or "sub pixel" that works together to create images




LCD versus Plasma Television - Plasma Display: Plasma is a highly ionized gas-like substance that is an excellent conductor of electricity. A Plasma Display consists of thousands (and sometimes millions) of tiny, glass, plasma-filled chambers, which are layered between two wired glass panels. The wires are arranged in rows and columns on either panel, creating a grid. A charge is directed to the desired wire intersection, which activates individual pixels. Behind each of the glass chambers are three phosphors that emit red, green, or blue light, and combine to create the images on the screen. A digitally controlled electric current excites the plasma, causing it to give off invisible ultraviolet light. This ultraviolet light strikes the phosphors on the back of the display and makes them display the appropriate color. Plasma Displays eliminate the need for a back light source because they produce their own light.

The result of plasma technology is an evenly focused, realistic picture with a wide viewing angle. Plasma displays perform well regardless of lighting conditions and are not affected by magnetic fields. But the phosphors and gases deteriorate over time, causing brightness to fade. The life span of a plasma display averages 30,000 hours (compared to 20,000 hours for a CRT).

LCD versus Plasma Television - Liquid Crystal Display:

LCDs became popular in the 1970s. Today, LCDs are used in a variety of digital devices, including calculators, watches, microwave ovens, computers, and front projection TVs. They use a gas-like substance known as Liquid Crystals to create a display.

Liquid crystal is a substance that shares characteristics of both a liquid and a solid. An electric current is used to manipulate them to allow light to pass through or be blocked out, like the shutter of a camera. In a rear-projection TV, this light source is at the back of the television, behind the layer of liquid crystals. In a front-projection TV, a panel of mirrors is positioned at back of the crystals to reflect the light projected from the front of the TV. Applying voltage, which changes the properties of each Liquid Crystal Cell (LCC) in the display, forms images. This in turn alters the pixel's light absorption properties. There are basically two different types of LCD screens: passive matrix and active matrix, (otherwise known as thin film transistor or TFT). Passive matrix screens have been around a long time and have improved a lot over the years. They are still used in laptop computers. To get the best out of a passive matrix screen, view the screen straight on. It can get a bit washed out on a bright day outdoors, but they are proven and reliable and inexpensive. TFT screens produce a higher quality image that's brighter and sharper than those produced by a passive matrix display. You do not have to view the screen from a particular angle to see clearly.