Plasma panel display PDP,

What is a plasma, is it like blood plasma? 

what the different between Plasma and LED Display

it is basically just an electrically conductive gas that contains both free-flowing ions (positively charged atoms) and electrons which are negatively charged?

In different way of explaining plasma, it’s a type of flat panel display common to large TV display for example 30’’ plasma TV or larger up to 152’’.

The Technology behind the Plasma 

The concept for the plasma display had been invented in the 1930s, with a single-color plasma displays being produced in the 1960s and 1970s, especially for early computers.

The xenon and neon gas mixture in a plasma television is contained in hundreds of thousands of tiny cells positioned between two plates of glass. Long electrodes are also sandwiched between the glass plates, in front of and behind the cells. The address electrodes sit behind the cells, along the rear glass plate. The transparent display electrodes, which are surrounded by an insulating dielectric material and covered by a magnesium oxide protective layer, are mounted in front of the cell, along the front glass plate. Control circuitry charges the electrodes that cross paths at a cell, creating a voltage difference between front and back and causing the gas to ionize and form a plasma. As the ions rush to the electrodes and collide, photons of light are emitted.

In a monochrome plasma panel, the ionizing state can be maintained by applying low-level voltage between all horizontal and vertical electrodes, even after the ionizing voltage is removed. To erase a cell, all voltage is removed from a pair of electrodes. This type of panel has inherent memory and does not use phosphors. A small amount of nitrogen is added to the neon to increase hysteresis.

In color panels, the back of each cell is coated with a phosphor. Ultraviolet photons emitted by the plasma excite these phosphors to give off colored light. The operation of each cell is thus comparable to that of a fluorescent lamp.

Every pixel is made up of three separate subpixel cells, each with different colored phosphors. One subpixel has a red light phosphor, another has a green light phosphor, and a third has a blue light phosphor. These colors blend together to create the overall color of the pixel, analogous to the "triad" of a shadow-mask CRT. By varying the pulses of current flowing through the different cells thousands of times per second, the control system can increase or decrease the intensity of each subpixel color to create billions of different combinations of red, green and blue. In this way, the control system can produce most of the visible colors. Plasma displays use the same phosphors as CRTs, which accounts for the extremely accurate color reproduction.

The principal is very simple instead of using a beam of electrons to create lines, the plasma screen uses what are in effect tiny, quick acting fluorescent light cells to form a picture.

Credit to; new world encyclopedia