The plasma state means that the electrons in the atoms of a substance are separated from the attraction of the atomic nucleus at high temperatures, causing the substance to exist in a state of positively and negatively charged particles.
In daily life, we encounter various substances. According to their state, they can be divided into three major categories, namely solid, liquid and gas. For example, steel is a solid, water is a liquid, and oxygen is a gas. Any substance can transform between these three states under certain conditions. Taking water as an example, under a standard atmospheric pressure, when the temperature drops below 0°C, water begins to turn into ice. When the temperature rises to 100°C, water will boil and turn into water vapor.
How will the gas change if the temperature continues to rise? Scientists tell us that at this time, the atoms that make up the molecule split and form independent atoms. For example, a nitrogen molecule (N2) will split into two nitrogen atoms (N). We call this process the dissociation of gas molecules. If the temperature is further raised, the electrons in the atom will be stripped from the atom and become a positively charged nucleus (called an ion) and a negatively charged electron. This process is called ionization of the atom. When this ionization process occurs frequently and the concentration of electrons and ions reaches a certain value, the state of the material changes fundamentally, and its properties become completely different from those of gases. In order to distinguish it from the three states of solid, liquid and gas, we call this state of matter the fourth state of matter, also named plasma.
In the vast and boundless space of the universe, the plasma state is a ubiquitous state. Most of the luminous planets in the universe have high internal temperatures and pressures, and the material inside these planets is almost always in a plasma state. Solid, liquid, and gaseous materials can only be found in dim planets and scattered interstellar matter.
Plasma matter is often seen around us. Traces of it can be found in fluorescent lamps and neon lamps, and in the dazzling incandescent arcs. In addition, wonderful plasma states can also be found in the ionosphere around the Earth, in beautiful aurorae, flash discharges in the atmosphere and the tails of meteors.
What is the use of plasma? oh! Its uses are very wide. It has very important application value from our daily life to industry, agriculture, environmental protection, military, aerospace, energy, celestial bodies, etc.
An important study is high-temperature plasma and controlled thermonuclear fusion reactions: If the lightest element in matter, such as hydrogen isotope deuterium, is used to form a high-temperature plasma of tens of millions of degrees Celsius, Then, these nuclei will undergo nuclear reactions. As a result, huge amounts of energy will be released, and scientists call it a thermonuclear fusion reaction. The hydrogen bomb is such an explosive thermonuclear fusion reaction. However, humans hope to have a thermonuclear fusion reaction that slowly releases energy and can generate electricity, and to build an "artificial small sun". However, this goal has not yet been achieved.
Another important application is that some special chemical elements form a low-temperature plasma of tens of thousands of degrees Celsius. At this time, special chemical reactions will occur between substances, so it can be used to develop new materials. For example, coating drill bits and other tools with a thin layer of titanium to improve the strength of the tools, manufacturing solar cells, and coating the surface of aircraft with a material that specifically absorbs radar waves can avoid radar tracking (i.e., stealth aircraft)... These are called plasma thin film technologies.
In addition, plasma can also be used to remove sulfur from smoke, use plasma to irradiate seeds to increase crop yields, develop large-screen plasma TVs, and develop plasma rocket engines to travel to distant places such as Mars. Traveling through the universe...the applications of plasma are endless.
The so-called plasma color TV PDP (P la sm a D isp lay Pan e l) is to fill a mixed gas between two thin glass plates, apply a voltage to generate ion gas, and then discharge the plasma gas, and Phosphors in the substrate react to produce a color image. Plasma color TV, also known as "wall-mounted TV", is not affected by magnetism and magnetic fields. It has the advantages of slim body, light weight, large screen, bright colors, clear picture, high brightness, low distortion and space saving.
Plasma (PDP for short) is a new generation display device using plasma flat screen technology that has developed rapidly in recent years. There are currently two types of products on the market, one is a plasma display screen, and the other is a plasma display screen. One is a plasma TV. There is not much difference between the two in nature. The only difference is whether there is a built-in TV reception tuner.
Since PDP was mainly aimed at commercial display purposes in the early stages of development, there are still many PDPs that do not have built-in TV reception tuners, that is to say, they cannot directly receive TV signals. Therefore, if you choose this product, you can only use other equipment such as a satellite decoder or video recorder to double as a TV signal tuning receiver, or you can purchase an additional TV receiver. Nowadays, plasmas have begun to be designed and produced for home users. Some of the plasmas currently produced have built-in TV receivers. These models are pre-equipped with RF radio frequency connection terminals and can directly play TV programs.
Most domestic PDPs have built-in TV receivers, such as many products from Hisense, SVA and TCL. As for foreign manufacturers, some products use external TV receivers, and some products use built-in TV receivers. PDPs with external TV receivers are generally called plasma displays, and PDPs with built-in TV receivers are called plasma TVs. When purchasing, you should ask whether it has a TV reception function.
The so-called plasma, in terms of electrical technology, refers to an uncharged ionized substance containing ions, electrons and core particles. Plasma contains almost equal numbers of free electrons and anode electrons. In a plasma, particles have separated from the core particles. So when a plasma contains a large number of ions and electrons, making it the best conductor of electricity, and it is affected by a magnetic field, when the temperature is high, the electrons will separate from the core particles.
In recent years, PDP, supported by plasma flat screen technology, has been in full swing. It is the best candidate for true flat screen TVs in the future. In fact, plasma display technology is not a new technology that has only appeared in recent years. As early as 1964, the University of Illinois in the United States successfully developed a plasma display flat panel, but at that time the plasma display was monochromatic. Plasma flat screen technology is now the latest technology and it is the best choice for high quality images and large flat screens. A large flat screen allows you to watch TV in any environment. The plasma panel has a series of pixels, and these pixels contain three secondary pixels, which are red, green, and blue. The gas in the plasma reacts with the phosphors in each subpixel to produce red, green or blue. This phosphor is the same phosphor used in cathode ray tube (CRT) devices such as televisions and regular computer monitors, so you get the rich, dynamic colors you expect, each made of A single sub-pixel controlled by advanced electronics can produce 1.6 billion different colors, all of which means you can more easily see the best on a display that's less than 6 inches thick.