1. What is plasma, plasma screen and plasma TV 1. Plasma: With the increase of temperature, general substances appear as solid, liquid and gas in turn. They are collectively called the three states of matter. When the temperature of the gas is further increased, many or even all of the molecules or atoms will dissociate into electrons and positive ions due to intense collisions. At this time, matter will enter a new state, which is mainly composed of electrons and positive ions (or positively charged nuclei). Matter in this state is called plasma, and it can be called the fourth state of matter. Second, the principle of plasma There are thousands of sealed small low-pressure gas chambers (a mixture of xenon and neon) arranged on the display screen, and the voltage excites the gas to emit ultraviolet light that is invisible to the naked eye. This ultraviolet light hits the red, green, and blue phosphors on the back glass, and they emit the visible light we see on the display. 3. Advantages and Disadvantages of Plasma As a mainstream flat-panel TV, especially since the second half of 2004, the global demand for plasma TVs has gradually increased, so it must have the advantage of attracting consumers, but everything has two sides. Let's introduce it to you in detail, as follows: 4. Major plasma manufacturers The plasma production is mainly divided into the production of plasma screens and the production of plasma TVs. Plasma technology is basically controlled by Japanese and Korean companies, so the plasma screen can only be independently produced by Fujitsu Hitachi, Pioneer, Panasonic, LG and Samsung. Now Taiwan ’s manufacturers of screens have to intervene in plasma screens. Production, that is also the technology provided by Japanese manufacturers. There are many companies in the production of plasma TVs, both large internationally renowned home appliance manufacturers and famous home appliance manufacturers in China. V. Four major buying points of plasma TV 1. One of the technical selling points: Panel size plasma TVs are well-known in the field of flat-panel TVs, and in the field of panel technologies, Korean manufacturers represented by LG have a strong advantage. At the beginning of the year, a large screen of 71 inches was released. Plasma TV, of course, the price is high. At present, the most mainstream product on the market is 42 inches, with 50 inches, 60 inches, etc., but in terms of cost performance and the actual needs of ordinary families, 42 inches is the most suitable. As for some manufacturers who make a fuss about the measurement method, the original 42-inch product plus the false size obtained by the frame, consumers need to carefully identify. Extension Plug Point,Ldnio Power Extension,One Gang Extension Socket,Brennenstuhl Extension Sockets Heikki Technology Co., Ltd. , https://www.heikkipower.com
2. Plasma screen: Plasma screen is generally referred to as PDP, because its English name is Plasma Display Panel, which is to fill a mixed gas between two thin glass plates, apply voltage to generate ionic gas, and then discharge the plasma gas. It reacts with the phosphor in the substrate to produce a color image.
3. Plasma TV: Plasma TV is a TV that uses a plasma screen as a display component. Plasma color TV is also known as "wall-mounted TV". It is not affected by magnetic force and magnetic field. It has a thin body, light weight, large screen and bright colors. It has the advantages of clear picture, high brightness, low distortion and space saving.
PDP is a display device that uses gas discharge. This screen uses a plasma tube as a light-emitting element. A large number of plasma tubes are arranged together to form a screen. Each small chamber corresponding to each plasma is filled with neon and xenon gas. . After the high voltage is applied between the plasma tube electrodes, the gas enclosed in the plasma tube chamber between the two layers of glass will generate ultraviolet light to excite the red, green and blue phosphors on the flat panel display to emit visible light. Each plasma tube acts as a pixel, and the combination of light and dark and color changes of these pixels produces various grayscale and color images. It is very similar to the glow of a kinescope. From the working principle, plasma technology is compared with other display methods. There are obvious differences, one step ahead in terms of structure and composition. The working mechanism is similar to ordinary fluorescent lamps. The color image of the TV is synthesized by the luminescence of each independent phosphor pixel, so the image is bright, bright, clean and clear. Plasma displays are smaller than cathode ray tube (CRT) displays, and the colors are brighter and brighter than LCD displays. The displayed image will not be distorted. Each pixel on the plasma display screen is illuminated by a small amount of plasma or charging gas, a bit like a faint neon light. Plasma displays are sometimes referred to as flat panel displays, which can be used to display analog video signals or VGA digital signals.
(1) Advantages:
1. Plasma has extremely high contrast, for example, many plasma TVs can reach 5000: 1 or 10000: 1, and liquid crystal can reach 1000: 1.
2. Plasma has good color display capability, with a maximum of 5 billion colors, and liquid crystal is generally 16.77 million colors;
3. The plasma response speed is very fast. Plasma is on the order of microseconds, while LCD-TV is on the order of milliseconds, which is a thousand times difference in three orders of magnitude. The characteristics of the LCD molecule itself determine that its response speed will never be less than 1 millisecond.
4. Plasma has a long service life. Compared with other medium and large screen TVs such as rear projection, plasma has a long service life like LCD. Under normal circumstances, it can reach a life of 35,000 hours. The nominal life of products such as Hitachi and other companies has reached 60,000 hours, while the general life of projection TVs such as rear projection is only 5,000 hours, although some manufacturers claim that their rear projection energy Reached 10000 hours of life, but compared with liquid crystal and plasma is still too short;
5. Plasma has a good visual range, unlike liquid crystal, its viewing angle range is generally above 160.
(2) Disadvantages 1. Although the plasma TV is very thin, it is actually not light;
2. The screen is easy to be burned. If you let it display a unified picture for a long time, it is particularly easy to burn. Therefore, the plasma screen should be displayed as a screen saver;
3. The dark black level does not perform well;
4. Because of its large screen, it is particularly fragile, which requires us to be very careful during transportation, installation and daily use;
5. The power consumption is relatively large, generally a 42-inch power consumption is 380W, like a 60-inch one, it should reach 600W;
2. The second selling point of technology: Resolution Resolution is one of the important indicators that determine the clarity of the picture. In this regard, some manufacturers often confuse the two concepts of physical resolution and compatible resolution in their publicity. In fact, as a high-end product such as a plasma TV, its compatible resolution can reach the level of 1920 × 1080, which means that the TV can decode and display images at this resolution, but the clarity of the actual picture shows the physical nature of the panel Resolution related. At present, the mainstream 42-inch plasma physical resolution is generally VGA level (852 × 480) or XGA level (1024 × 768). Of course, the latter is more expensive than the former.
3. The third selling point of technology: Contrast and Brightness The two most important indicators of the plasma panel are contrast and brightness, which determine the brightness of the screen. Higher contrast and brightness bring higher-quality visual enjoyment, especially when watching high-definition programs such as DVDs or digital TVs, in the fast light and dark conversion of dynamic images, the higher the contrast and brightness, the easier it is for the human eye to distinguish These conversion processes can see the details in some dark scenes. The industry average level of plasma TV contrast is generally 3000: 1. Recently, LG launched a PDP with a contrast ratio of more than 10,000, breaking the industry's highest record of 5000: 1 maintained by itself, and the brightness has reached 1500 lumens.
4. The fourth selling point of technology: external screen The traditional plasma panel will have a glass external screen outside the front glass base layer, which will affect the TV picture quality. Manufacturers have been looking for solutions to eliminate this effect. LG's filter film (Film Film) solves this problem, effectively eliminates scattering and double ghosting, and has outstanding light transmission performance, color purity is also significantly improved, but weight is reduced 5 kg, the thickness is reduced by 10 mm.
5. The fifth selling point of technology: In addition to the support of the top panel, the high-end plasma color TV of digital engine also needs an intelligent digital processing engine to help it display the perfect picture. LG's XD engine, SONY's Guixiang engine and Samsung's DNie technology are all digital processing technologies independently developed to achieve the purpose of greatly improving picture quality.