What does pdp mean? What is PDP?
The full name of PDP is PlasmaDisplayPanel, which is called plasma display screen in Chinese. It is a device that injects a mixed gas between two ultra-thin glass plates and applies voltage to use phosphor to emit light. Compared with CRT display, it has the characteristics of high resolution, large screen, ultra-thin, rich and bright colors. Compared with LCD, it has the characteristics of high brightness, high contrast, large viewing angle, bright colors and rich interfaces.
The working principle of pdp:
It is a display technology that uses gas discharge, and its working principle is very similar to fluorescent lamps. It uses a plasma tube as a light-emitting element, each plasma tube on the screen corresponds to a pixel, the screen uses glass as a substrate, the substrate is separated by a certain distance, and the surroundings are hermetically sealed to form discharge spaces. The discharge space is filled with mixed inert gas such as neon and xenon as working medium. The inner surfaces of the two glass substrates are coated with conductive metal oxide films as excitation electrodes. When voltage is applied to the electrodes, the gas mixture in the discharge space will cause plasma discharge. The gas plasma discharge generates ultraviolet rays, and the ultraviolet rays excite the fluorescent screen, which emits visible light and displays an image. When a phosphor screen coated with three primary colors (also called three primary colors) phosphors is used, ultraviolet light excites the phosphor screen, and the light emitted by the phosphor screen exhibits three primary colors of red, green, and blue. When each primary color unit achieves 256 levels of gray and then performs color mixing, color display is achieved. Plasma display technology can be divided into two categories: direct-current PDP with electrodes in direct contact with gas and alternating-current PDP with dielectric layer covered on the electrodes according to their working methods. At present, there are mainly three types of color PDPs researched and developed: single substrate type (also known as surface discharge type) AC PDP, dual type (also known as opposite discharge type) AC PDP and pulse storage DC PDP.
Features of pdp:
Plasma is a self-luminous display technology that does not require a background light source, so there is no problem of viewing angle and brightness uniformity of the LCD display, and higher brightness and contrast are achieved. And the design that the three primary colors share the same plasma tube also avoids the problems of focusing and convergence, and can achieve a very clear image. Compared with CRT and LCD display technologies, the larger the plasma screen, the higher the color depth and fidelity of the image. In addition to the advantages of brightness, contrast, and viewing angle, plasma technology also avoids the problem of response time in LCD technology, and these characteristics are the most important factors in dynamic video display. Therefore, from the current technical level, plasma display technology has more obvious advantages in the field of dynamic video display, and is more suitable for use as a home theater and large-screen display terminal. The plasma display is scanned without scanning lines, so the image is clear and stable without flicker, and it will not cause eye fatigue. The plasma is also free of X-ray radiation. Because of these outstanding features, plasma can be called a truly green and environmentally friendly display product, and is an ideal product to replace traditional CRT color TVs.
Advantages and disadvantages of PDP
Plasma display technology proves to have higher technical advantages than traditional kinescopes and LCD liquid crystal displays, manifested in:
1. Compared with direct-view CRT TVs, PDP monitors are smaller and lighter, and have no X-ray radiation. In addition, because the structure of each light-emitting unit of the PDP is completely the same, there will be no image geometric distortion common to kinescopes. The brightness of the PDP screen is very uniform-there is no bright area and dark area, unlike the brightness of the picture tube-the center of the screen is higher than the surrounding brightness, and the PDP will not be affected by the magnetic field and has better environmental adaptability. There is no focusing problem on the PDP screen, so it completely eliminates the intractable disease of certain areas of the picture tube or the defocusing that has been defocusing for a long time; the color drift phenomenon of the picture tube will not occur, and the flat surface also makes the corners of the large screen The distortion and color purity at the location are completely improved. At the same time, its high brightness, large viewing angle, full color and high contrast mean that the PDP image is clearer, the colors are more vivid, the experience is more comfortable, and the effect is more ideal, which makes the traditional TV amazing.
Second, compared with LCD liquid crystal display, PDP display has the advantages of high brightness, good color reproduction, rich grayscale, and fast response to rapidly changing pictures. Because the screen brightness is as high as 150 Lux, you can enjoy large-screen video programs in a bright environment. In addition, PDP has a wide field of view, which can provide exceptionally bright, even and smooth pictures and an unprecedented larger viewing angle. The viewing angle of the PDP is as high as 160 degrees. The ordinary TV set is severely distorted when viewed in a place greater than 160 degrees. As for the LCD screen with a viewing angle of only about 40 degrees, it is even more unprecedented. In addition, PDP's flat and thin appearance makes its advantages more obvious, especially suitable for public information display, wall-mounted large-screen TV and automatic monitoring system.
3. Because the PDP display is easy to "operate" and match "combat" with the large-scale integrated circuit, it can be put into battle with ease. The parts in the body can be disassembled, the process is convenient, the structure is simpler, and it is suitable for modern mass production. At the same time, it can greatly reduce the size and weight of the machine, the effect is very ideal.
Of course, the special structure of the PDP plasma display screen also brings some weaknesses. For example, because the plasma display is a flat design, and the glass on the display is extremely thin, its surface cannot withstand too much or too little atmospheric pressure, nor can it withstand unexpected heavy pressure. Each pixel of the PDP display screen independently emits light by itself. Compared with the use of an electron gun in a CRT TV, the power consumption is greatly increased. Generally, the power consumption of plasma displays is higher than 300 watts, which is a big consumer of household appliances in the future. Due to the high heat generation, multiple sets of fans are installed on the back panel of the PDP monitor for heat dissipation. In addition, PDP prices are relatively high, mainly used in public places, such as airports, railway stations, exhibition venues, corporate seminars, academic conferences and remote meetings.
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