A screen to the plasma (Plasma Display Panel - PDP) is a type of large flat screen hour commonly used for screen television (typically over to the 32 inches). Many small cells posizionate in means to two panels of glass maintain one inert noble gas mixture (neon and xeno). The gas in the cells comes electrically transformed in a plasma, which then it excites phosphorus to emit light.
Saturday, February 9, 2008
Plasma Display Panel
A screen to the plasma (Plasma Display Panel - PDP) is a type of large flat screen hour commonly used for screen television (typically over to the 32 inches). Many small cells posizionate in means to two panels of glass maintain one inert noble gas mixture (neon and xeno). The gas in the cells comes electrically transformed in a plasma, which then it excites phosphorus to emit light.
History Of The Plasma
The screen to the plasma has been invented inthe University of the Illinois to Urbana-Champaign from Donald L. Bitzer, H. Gene Slottow, and from the student Robert Willson in 1964 for the PLATO System Computer. It originates them monochromium plated panels us (of orange or green usual, to times yellow) had an impulse of popolarità in years ' 70 since the screen was sturdy and they did not need neither of memory neither of circuitry electronic for the refresh ofthe image. It followed in years ' 80 along period of decline of the sales when the memories to semiconductor rendered cathodic tube screen CRT () more economic than those to the plasma. That although, the relatively great dimensions of a screen to the plasma and the thin profile, rendered screen attractive for giving an image of high profile such, as it knows them of income and stock markets.
In 1983 IBM introduced black an orange monochromatic screen on of 19 inches (model 3290 "information panel") which she was in a position to showing four blots of it virtual (VM) IBM 327 in session of finishes them. The factory was transferred in 1987 in the emergent company Plasmaco, than Larry F. Weber, one of the students of Bitzer, founded with Stephen Globus and James Kehoe, that it was the manager of the factory of IBM. In 1992 the Fujitsu introduced the first screen of 21 inches to colors to the world. It was a hybrid, based on the screen to the plasma created tothe University of the Illinois andNHK STRL (the laboratory of the tv Japanese), obtaining one advanced brightness. In 1996 the Matsushita Electrical Industries (Panasonic) bought the Plasmaco, its technology to colors AC and the factory American. In 1997 the Pioneer began to sell the first television set to the plasma to the public.
Only recently, the greater detail in the dark scenes, a smaller effect wake, a greater phantom than colors and a wider visual angle has rendered the screen to the plasma the more popular shape for televisions HDTV, to the damages of screen LCD. For along period it has been believed that technology LCD was only adapted for the smaller televisions, accomplice also the economic impossibility of the display to the plasma to come down in diagonal, and it could not instead have competed in the segment of the great diagonals, that is from the 40 inches in on.
However, from then, the improvements of the technology LCD, accomplices also the great investments in search, have strongly reduced the gap technological. The prices in reduction, the higher to parity than diagonal, important resolutions for the HDTV, the inferior weight, the phantom of colors increased, and finally a consumption inferior electrical worker, render them competiti to you against the screen to the plasma in all the segments of market. To the end of the 2006 it has been already noticed that screen LCD is exceeding in the sales those to the plasma, particularly in that segment of 40"and advanced where historically strong predominanza of screen to the plasma was one. Industrial other trend is the consolidation of the constructors of screen to the plasma, with approximately fifty various ones marks, but only five great producers.
Characteristic generates them
The screen to the plasma is luminous (1000 lux or more for the modules), has a wide one gamut of colors and can be produced in greatest dimensions, until 262 cm (103 inches) diagonally. They have a greatest level of black "dark-room", creating "black perfect" the desirable one in order to watch films. The panel of the screen is wide only 6 centimeters, while the width total, included the part electronic that manages the screen, is inferior to the 10 centimeters. The screen to the plasma how much consumes much Watt for square meter the cathodic tubes or televisions AMLCD. The consumption is influenced from that it is being watched: luminous scenes, like, in order to make an example, a sport event, will absorb much more watt than a film with many nocturnal scenes. Nominal measures indicate approximately 400 watt for one 50"screen.
The duration of a screen to the plasma of last generation is estimated in 60 000 hours (27 years with 6 hours of uses to the day). More just, this is the esteem of half of the life of the screen, the point in which the image it is degraded to half of its brightness originates them. He is still guardabile after this point, than but it comes generally considered the end of the life works them of the screen.
The screen that they compete with includes the CRT, OLED, AMLCD, DLP, SED-tv and screen plates field emission. The main advantage of the technology for screen to the thin plasma is that large screen can be produced one much using material much. Every Siccome pixel comes ignited individually, the image is much luminous one and has a wide visible angle.
In 1983 IBM introduced black an orange monochromatic screen on of 19 inches (model 3290 "information panel") which she was in a position to showing four blots of it virtual (VM) IBM 327 in session of finishes them. The factory was transferred in 1987 in the emergent company Plasmaco, than Larry F. Weber, one of the students of Bitzer, founded with Stephen Globus and James Kehoe, that it was the manager of the factory of IBM. In 1992 the Fujitsu introduced the first screen of 21 inches to colors to the world. It was a hybrid, based on the screen to the plasma created tothe University of the Illinois andNHK STRL (the laboratory of the tv Japanese), obtaining one advanced brightness. In 1996 the Matsushita Electrical Industries (Panasonic) bought the Plasmaco, its technology to colors AC and the factory American. In 1997 the Pioneer began to sell the first television set to the plasma to the public.
Only recently, the greater detail in the dark scenes, a smaller effect wake, a greater phantom than colors and a wider visual angle has rendered the screen to the plasma the more popular shape for televisions HDTV, to the damages of screen LCD. For along period it has been believed that technology LCD was only adapted for the smaller televisions, accomplice also the economic impossibility of the display to the plasma to come down in diagonal, and it could not instead have competed in the segment of the great diagonals, that is from the 40 inches in on.
However, from then, the improvements of the technology LCD, accomplices also the great investments in search, have strongly reduced the gap technological. The prices in reduction, the higher to parity than diagonal, important resolutions for the HDTV, the inferior weight, the phantom of colors increased, and finally a consumption inferior electrical worker, render them competiti to you against the screen to the plasma in all the segments of market. To the end of the 2006 it has been already noticed that screen LCD is exceeding in the sales those to the plasma, particularly in that segment of 40"and advanced where historically strong predominanza of screen to the plasma was one. Industrial other trend is the consolidation of the constructors of screen to the plasma, with approximately fifty various ones marks, but only five great producers.
Characteristic generates them
The screen to the plasma is luminous (1000 lux or more for the modules), has a wide one gamut of colors and can be produced in greatest dimensions, until 262 cm (103 inches) diagonally. They have a greatest level of black "dark-room", creating "black perfect" the desirable one in order to watch films. The panel of the screen is wide only 6 centimeters, while the width total, included the part electronic that manages the screen, is inferior to the 10 centimeters. The screen to the plasma how much consumes much Watt for square meter the cathodic tubes or televisions AMLCD. The consumption is influenced from that it is being watched: luminous scenes, like, in order to make an example, a sport event, will absorb much more watt than a film with many nocturnal scenes. Nominal measures indicate approximately 400 watt for one 50"screen.
The duration of a screen to the plasma of last generation is estimated in 60 000 hours (27 years with 6 hours of uses to the day). More just, this is the esteem of half of the life of the screen, the point in which the image it is degraded to half of its brightness originates them. He is still guardabile after this point, than but it comes generally considered the end of the life works them of the screen.
The screen that they compete with includes the CRT, OLED, AMLCD, DLP, SED-tv and screen plates field emission. The main advantage of the technology for screen to the thin plasma is that large screen can be produced one much using material much. Every Siccome pixel comes ignited individually, the image is much luminous one and has a wide visible angle.
Characteristic generates them
The screen to the plasma is luminous (1000 lux or more for the modules), has a wide one gamut of colors and can be produced in greatest dimensions, until 262 cm (103 inches) diagonally. They have a greatest level of black "dark-room", creating "black perfect" the desirable one in order to watch films. The panel of the screen is wide only 6 centimeters, while the width total, included the part electronic that manages the screen, is inferior to the 10 centimeters. The screen to the plasma how much consumes much Watt for square meter the cathodic tubes or televisions AMLCD. The consumption is influenced from that it is being watched: luminous scenes, like, in order to make an example, a sport event, will absorb much more watt than a film with many nocturnal scenes. Nominal measures indicate approximately 400 watt for one 50"screen.
The duration of a screen to the plasma of last generation is estimated in 60 000 hours (27 years with 6 hours of uses to the day). More just, this is the esteem of half of the life of the screen, the point in which the image it is degraded to half of its brightness originates them. He is still guardabile after this point, than but it comes generally considered the end of the life works them of the screen.
The screen that they compete with includes the CRT, OLED, AMLCD, DLP, SED-tv and screen plates field emission. The main advantage of the technology for screen to the thin plasma is that large screen can be produced one much using material much. Every Siccome pixel comes ignited individually, the image is much luminous one and has a wide visible angle.
The duration of a screen to the plasma of last generation is estimated in 60 000 hours (27 years with 6 hours of uses to the day). More just, this is the esteem of half of the life of the screen, the point in which the image it is degraded to half of its brightness originates them. He is still guardabile after this point, than but it comes generally considered the end of the life works them of the screen.
The screen that they compete with includes the CRT, OLED, AMLCD, DLP, SED-tv and screen plates field emission. The main advantage of the technology for screen to the thin plasma is that large screen can be produced one much using material much. Every Siccome pixel comes ignited individually, the image is much luminous one and has a wide visible angle.
Details on the operation
The neon and gases xeno in a television set to the plasma are contained in hundred of migliaia of small cells posizionate between two panels of glass. Also of the long electrodes they come inserted between the glass panels, and behind the cells. The indirizzamento electrodes are behind the cells, along the panel of posterior glass. The transparent electrodes of the screen, that they are encircles from dielectric insulator to you and covered material of a protecting layer in magnesium oxide, are mount to you in front of the cells, along the front glass. The loaded circuitry of control the electrodes that are intercrossed to a cell, creating a potential difference them between and behind provoking to the ionization of gases and the plasma formation ; when the Ionian ones of the gas head towards the electrodes and collidono they come emitted of photons.
In a monochromatic screen, the ionizzante state can be maintained applying to a voltage of low level between all the horizontal and vertical electrodes, also when the ionization voltage comes removed. In order to cancel a cell, all the tension comes removed from the electrodes. This type of panel has an intrinsic memory and it does not use phosphorus. One small nitrogen amount comes added to neon in order to increasethe hysteresis.
In the panels to colors, the back of every cell is covered with a phosphorus. The emitted ultraviolet photons from the plasma excite these phosphorus for giving colorful light. Every cell is therefore comparable to one fluorescent lamp.
Every pixel it is made of three sottocelle separate, ognuna with phosphorus of various colors. A sottocella it has phosphorus for the red light, one for the green light and the other for the blue light. These colors join together in order to create the color total of the pixel, analogous to the Triad computers (to three colors; for technical details you see pixel, technical aspects) or to screen CRT. Varying the current impulses that slide through the various cells migliaia of times to the second, the control system can increase or diminish the intensity of every every color of sottocella in order creating billions of various combinations of green, red and blue. In this way the control system can produce the greater part of the visible colors. The display to the plasma they use same phosphorus of the CRT, that door to one reproduction of the colors extremely taken care of.
In a monochromatic screen, the ionizzante state can be maintained applying to a voltage of low level between all the horizontal and vertical electrodes, also when the ionization voltage comes removed. In order to cancel a cell, all the tension comes removed from the electrodes. This type of panel has an intrinsic memory and it does not use phosphorus. One small nitrogen amount comes added to neon in order to increasethe hysteresis.
In the panels to colors, the back of every cell is covered with a phosphorus. The emitted ultraviolet photons from the plasma excite these phosphorus for giving colorful light. Every cell is therefore comparable to one fluorescent lamp.
Every pixel it is made of three sottocelle separate, ognuna with phosphorus of various colors. A sottocella it has phosphorus for the red light, one for the green light and the other for the blue light. These colors join together in order to create the color total of the pixel, analogous to the Triad computers (to three colors; for technical details you see pixel, technical aspects) or to screen CRT. Varying the current impulses that slide through the various cells migliaia of times to the second, the control system can increase or diminish the intensity of every every color of sottocella in order creating billions of various combinations of green, red and blue. In this way the control system can produce the greater part of the visible colors. The display to the plasma they use same phosphorus of the CRT, that door to one reproduction of the colors extremely taken care of.
Relationship of contrast
The contrast relationship is a intrinsic value del display, seppur employee from external factors like calibration and brightness it acclimatizes them, and it is obtained more measuring the relationship between the more luminous part and that buia than one image, that is the white man, and the black one. Generally, greater values indicate one more realistic image, in how much sintomatica of one probable ability to the screen to show a high number of discreet steps of gradazioni. The relationships of contrast for the screen to the plasma are pubblicizzati like rather high, in around of the 10.000:1. On the paper this turns out in a good advantage of the plasma regarding the other technologies of display. Not existing industrial outlines in order to measure the contrast relationship, the greater part of the producers adopts what it guarantees values more elevates to you, standard VESA (called also ON/OFF), that totally black image consists in the visualization of one, continuation from one totally white woman. Less used he is instead the standard PANTS, that he uses an image of test to chessboard where black the darker and clearer white men are measured simultaneously, in how much gives back very inferior values, difficultly advanced to 600:1. The two measurements can are considered complementary, in how many ends, the VESA are end too much blanda, representing a visual scene practically never verifiable, while IT PANTS it is nearer what it can it are defined like the visual scene worse. You attend also the cases in which the producers they improve ulteriorly, in artificial way, the contrast relationship, in order then to be able some to boast greater values, opportunely acting in the settaggi of brightness and contrast. However, a relationship of generated contrast in this way is misleading, since for guilt of the settaggi it alters the images to you would be essentially inguardabili.
The technology to the base of the screen to the plasma helps to obtain high relationships of contrast. Similarly to the CRT, the screen to the plasma can obtain black nearly a every total completely extinguishing single cella/pixel, seppur then in truth this does not happen, in how much the cells always are held under load and ready to the use. This contrasts with technology LCD, where the black points, generate to you from a method of polarization of the light, are not in a position to completely blocking the coming from light from the retroilluminazione. However, the technology to the plasma has anch' it of the points weak people, in the first place making to work a screen to the maximum brightness meaningfully reduces the life of the panel. For this reason many owners leave the settaggi of the brightness a lot under to the maximum, that however advanced brightness of that one of the cathodic tube screen guarantees one. Finally, the display to the plasma they find themselves in difficulty in the images where there are many clear zones, the cells correspondents to those points need of much energy, going to influence the general brightness of the panel, than cove leggermente.
The technology to the base of the screen to the plasma helps to obtain high relationships of contrast. Similarly to the CRT, the screen to the plasma can obtain black nearly a every total completely extinguishing single cella/pixel, seppur then in truth this does not happen, in how much the cells always are held under load and ready to the use. This contrasts with technology LCD, where the black points, generate to you from a method of polarization of the light, are not in a position to completely blocking the coming from light from the retroilluminazione. However, the technology to the plasma has anch' it of the points weak people, in the first place making to work a screen to the maximum brightness meaningfully reduces the life of the panel. For this reason many owners leave the settaggi of the brightness a lot under to the maximum, that however advanced brightness of that one of the cathodic tube screen guarantees one. Finally, the display to the plasma they find themselves in difficulty in the images where there are many clear zones, the cells correspondents to those points need of much energy, going to influence the general brightness of the panel, than cove leggermente.
Burn-in of the screen
With screen electronic it bases to you on phosphorus (included those to cathode rays and the plasma), the visualization extended in the time of a bar of menu or other graphical elements it can create images ghost of these objects. This because of the fact that the members to phosphorus who emit the light forgiveness their brightness with the use. Like result, when some areas of the screen come used more than frequent than others, in the time the areas that have lost brightness become visible to eye knot, creating the effect called burn-in. While the ghost image is the more obvious effect, a more common result is that the quality of the image will continuously decrease gradually and while the brightness variations are developed, creating an effect "mud" in the visualized image.
The screen to the plasma exhibits also an other type of alteration of the image, which it comes to times confused with the damage give burn-in. In this way, when a group of pixel comes ignited to high brightness (visualizing the white man, as an example) for along period of time, it loads it is constructed in the structure of the pixel and becomes visible a ghost image. However, to difference of burn-in, this it loads constructed is transitory and autocorregge when the screen is extinguished sufficiently for a period along, or after to have visualized accidental television images.
The screen to the plasma exhibits also an other type of alteration of the image, which it comes to times confused with the damage give burn-in. In this way, when a group of pixel comes ignited to high brightness (visualizing the white man, as an example) for along period of time, it loads it is constructed in the structure of the pixel and becomes visible a ghost image. However, to difference of burn-in, this it loads constructed is transitory and autocorregge when the screen is extinguished sufficiently for a period along, or after to have visualized accidental television images.
Cathodic tube
The term cathode-ray tube, more commonly cathodic tube or CRT (acronym of the English term Cathode Ray Tube), commonly indicates the used technology for the visualization in the monitor and the televisori, that it consists ad hoc in the convogliare of the cathode rays on an sensitive surface, that reconstructs the visible image. The measure of monitor CRT is carried out on the diagonal of the visible area, in Inches.
The technology to the base cathodic tube was developed in 1897 from the German physicist Karl Ferdinand Braun who realized the first oscilloscope, while the first prototype of the type used in the modern televisori was realized from American inventor Philo Farnsworth.
Currently the technology of the cathodic tube is destined to a progressive obsolescence in favor of the technologies to the plasma, to crystals liquids and OLED, the less cumbersome, thriftier in the consumption electrical worker and with production costs in continuous reduction.
The cathodic tube monitor introduces the advantage, regarding the concurrent technologies, of a better speed than reaction (or minor appreciatedin the image and a lot, latenza use videogiochi) with more faithful colors.
The technology to the base cathodic tube was developed in 1897 from the German physicist Karl Ferdinand Braun who realized the first oscilloscope, while the first prototype of the type used in the modern televisori was realized from American inventor Philo Farnsworth.
Currently the technology of the cathodic tube is destined to a progressive obsolescence in favor of the technologies to the plasma, to crystals liquids and OLED, the less cumbersome, thriftier in the consumption electrical worker and with production costs in continuous reduction.
The cathodic tube monitor introduces the advantage, regarding the concurrent technologies, of a better speed than reaction (or minor appreciatedin the image and a lot, latenza use videogiochi) with more faithful colors.
Subscribe to:
Posts (Atom)