
Plasm Displays is devices based on the technology of plasm panels (PDP, Shapes Display Panel), that went aprimorada in to last decade tends in view the market of television of high definition (HDTV). Plasm screens are not used now in video cameras, in these screens of the types are only used CRT and LCD. Plasm Displays is totally plans, they possess high resolution, with exceptional reproduction of colors and they are usually manufactured in screen proportions different from the found in CRTs, generally 16:9 (widescreen), proportion this of image defined as pattern for HDTV. They are also fine panels, as well as the one of the type LCD, occupying little space, once it is not necessary any volume behind the same, as in the apparels of the type CRT (that need of that volume for the elétrons canyons).
Plasm Displays uses gaseous substances (xenon and neon) contained in minuscule cells, that they act as microscopic fluorescent lamps, emitting light to the they receive electric energy. Each cell is covered in its base it interns for a substance (match) that emits light when being stimulated by some radiation type, as the

elétrons bunch (in CRT) or the ultraviolet radiation (as in him plasm cell). This ultraviolet radiation is liberated by the gases contained in the cell when the same ones receive electricity. Therefore, unlike the panel of the type LCD for use in displays, the plasm panel emits own light and he/she doesn't need illumination for trás(backlight).
The cells in a plasm display are obtained in a head office of thousands of points (a screen with diagonal measuring 106 cm can possess 1 million cells). The match that recovers internamente each cell is colored, in 3 types of colors, red, green and blue, the basic colors of the system RGB. Each group of 3 of those cells emtindo lights in different colors represents a pixel of the image. Being varied the intensity of the applied electric current the certain cell is also varied the intensity of its shine; with that it is possible to dose the amount of light emitted in each one of the 3 cells of the pixel, being obtained with that whole the necessary colors to represent a certain image.
The microprocessor associated to the panel sends electric energy individually to each cell, making this thousands of times a second, cell the cell to create the image. In fact, the video sign is decoded by the processor that ' he/she draws ' the lines on the way cells similar to the one that happen in CRT.
The cells don't necessarily coincide with the pixels they be she represented in the image. And to represent a pixel for several cells is better than to have the size of the largest cell than the one of the pixel - he/she gets lost in resolution.
Fujitsu was the first company to market plasm screens in 1997, developed using

technology maid initially for IBM 25 years before.
Unlike the displays LCD, that possess angle of inferior vision to the of CRT, the plasm displays still possesses vision angle larger than the one of CRTs (160 degrees). One of the reasons is due to the fact of each cell to be lit up individually (in LCD a back general illumination exists). This fact also checks great shine to the image and it facilitates the making of plane screens with larger dimensions than the one of LCD. With relationship to the quality of the image, the same is very close to the one of the best apparels of the type CRT. In he/she Practices it Plasm it is the state of the matter where atoms are ionized when we increased energy, the plasm monitor is a plane and light surface, covered with millions of teeny glass bubbles. Each bubble contains a substance type gas, the plasm, that has a match layer. Think of those bubbles as PIXELS. Now, think of each pixel-bubble as tends three sub-pixels - 1 red, 1 green and 1 blue. Then, when it is necessary to show an image sign (RGB or Video), a current electric controlled digitalmente flows through the plane screen, doing with that the plasm (the substance type gas) it designates bubbles to expel the ultraviolet rays. The light caused by this reaction acts in the match layer doing with that this shines in the appropriate color. We have like this millions of bubbles RGB that shining individually produces a beautiful rich image in colors. Love to the first view TO THE first view, is the paradise. Fantastic images, vibrant colors, perfect lines. The one that the current and future buyers don't know is that, a lot of times, the plasm TV can become a headache and not always it is the type more indicated for its profile. The complaints on defects fill the technical forums in the Internet and the defense associations to the consumer they alert for the lack of information on the part of lojistas and makers.
It alerts The advantages of the very visible TV of healthy plasm. Giant screens, design caprichado and vibrant colors. The disadvantages, even so, difficultly they are to the exhibition and they are hardly ever correctly informed for the salespersons or makers. Who buys a plasm TV, it is not generally knowing about two technical restrictions and impeditivas that can remove the whole grace of the apparel and to place in check the investment.
First restrictions techniques: that pretty and perfect image that you see at the stores, he/she won't repeat at home, to not to be in special conditions. As: if you think can be glued per hours I entrust it sells TV, it is good to seek another amusement. To depend of the type of program televisivo, film or game, the screen of the plasm TV can be burned (spotted) after hours followed with stopped images, causing it called burn-in " effect and marking the screen in a way discreet.
Perfect image? it depends due to the own technology in itself, the plasm TV is molded to exhibit in the screen that only has of best when the sign is digital. In Brazil, the programs of the TV in the open channels arrive in analogical sign. When attending the channels opened in the plasm apparel, you will see scratched out, granulated and an image perceptibly inferior, sometimes worse than in its old TV common of 20 inches. To revert the problem, the option it would be to attend everything with TV for signature (Sky, DirecTV etc.), but, even so, there is not warranty that all the channels are digital. In the films in DVD, that are digital, there is not problem and the image is truly good.
Headache that is removing the buyers of the serious is the burn-in effect, when a static image burns the screen and he/she leaves a stain. Practical example: a soccer game with the logomarca of the channel being exhibited during the whole departure, stop, without moving. A lot of times, after the game, it is easy to notice that that local one was spotted.
Be informed and care with the salespersons Taking in consideration that the plasm TV is rectangular (format widescreen 16:9) and most of the programming is squared (standard format, 4:3) you will see two black tarjas beside the image. Those tarjas, after more or less two hours, they can stain the screen in a definitive way. To avoid that, a solution only exists: to force the reception for the format widescreen, deforming the image and causing visual desconforto. The omission of the information begins at the stores. When researching prices in the stores, the obvious event is to be amazed with the exhibited perfect image. The problem begins when the consumer asks information. In general, the store reviews everything of good on the plasm, without entering in details on the dangers of staining the screen and the low quality of the image when attending open channels.
Most of the salespersons at least knows how to explain, concretely, as it happens the stain and like her it can be avoided in the practice. In some situations, the lojistas explains that the " most recent models don't possess that burn-in problem, because the technology is better ". The truth is that the problem exists, and it is recognized officially by all the makers of plasm TVs and to today total solution doesn't exist.
Some makers of the TVs guarantee that the new models don't possess the problem, for they be of new generation, with resources anti-burn in. However, in the warranty, they don't specify. In the manual, the information are also superficial.
In agreement with the manager of products of LG, Fernanda Summa, some new models possess resources to liven up the burn-in. " The plasm has a restriction of the own technology of not leaving an image static a lot of time in the screen, as the lateral " black tarjas, it explains. She thinks " who buys like this a TV, he/she has to be prepared to use the format widescreen, even if it deforms a little the quality of the image in the open channels. But for films in DVD, the image is perfect ", it guarantees. The manager of logistics of Plasmashop, Thiago Sato, confirms that " unhappily, whole you shape them they are subject and most of the buyers doesn't make idea of the problems to that they happen.
The consumer's right lawyer Maíra Feltrin, of the Institute of Defense of the Consumer (IDEC), it explains that only the fact of the consumer not to be explained correctly about the restrictions they are enough to move a lawsuit. " The information should not only consist in the manual and the Justice can be worked against to maker and against the store, to depend of each case ", it guarantees, in spite of enhancing that, in the practice, it is a very difficult situation for the consumer.