Plasma displays first appeared back in the 1960s. They have many advantages - a wide viewing angle, thin thickness, high screen brightness and a flat viewing area.
Instructions
Step 1
To imagine how a plasma TV works, just look at a fluorescent lamp that works on the same principle. The lamp contains argon or any other inert gas, normally the atoms of such a gas are electrically neutral, but if an electric current is passed through it, a huge number of free electrons attack the gas atoms, which will lead to the loss of a neutral charge. As a result, the gas ionizes and turns into a conductive plasma.
Step 2
In this plasma, charged particles are in constant motion in search of free spots, colliding with gas atoms, which causes them to emit ultraviolet photons. These photons are invisible unless they are directed to the phosphor coating used inside fluorescent lamps. After being hit by ultraviolet photons, the phosphor particles begin to emit their own visible photons, which are visible to the human eye.
Step 3
Plasma displays use the same principle, except that they use a flat laminated glass structure rather than a tube. Hundreds of thousands of cells covered with phosphor are located between the glass walls. This phosphor can emit green, red and blue light. Transparent display electrodes of an oblong shape are located under the outer glass surface; they are covered with a dielectric sheet from above, and magnesium oxide from below.
Step 4
Cells of phosphors or pixels are located under the electrodes; they are made in the form of very small boxes. Under them is a system of address electrodes located perpendicular to the display, each address electrode passes through the pixels.
Step 5
A special mixture of neon and xenon is injected between the cells before sealing the plasma display under low pressure; they are inert gases. To ionize a specific cell, you need to create a voltage difference between the address and display electrodes, which are located above and below that specific cell.
Step 6
Due to this voltage difference, the gas ionizes, emitting a huge amount of ultraviolet photons that bombard the surface of the pixel cells, exciting the phosphor, which causes it to emit light. Voltage fluctuations (which are created using code modulation) allow you to change the intensity of the color of each specific pixel. This process occurs simultaneously with hundreds of thousands of such pixel cells, which allows you to get a high-quality image.
