Screen size PK: liquid crystal energy can be small and plasma energy can be large.
As far as the current technical level is concerned, it is not appropriate to compare the two together, because the difference between the two sides in screen size is very obvious. Due to the limitation of manufacturing technology, the mainstream products on the market are not large. With the large-scale increase in the output of Samsung's seventh-generation screen production line, the current 37-inch and 40-inch screens began to become mainstream sizes. And plasma, the smallest size is 42 inches, and now the market is more suitable for products of this size.
In fact, this situation is also a good division of labor for the two. If the bedroom, study and other places are relatively small, of course, smaller LCD is more popular, while in the living room and other places, the large picture of plasma has more advantages. Although there are 46-inch and 47-inch LCD TVs on the market at present, the prices are still relatively high and pose no threat to plasma. The plasma can reach 50, 60 or even 65 inches, and the two are still in peace.
Result: Each has his own strong points, and the battle is tied.
Resolution PK: plasma is not as good as liquid crystal.
Television is used to watch programs, so clarity is the most important thing. For flat-panel TVs, clarity depends on resolution. Interestingly, although the screen of plasma is large, its resolution is not as high as that of liquid crystal. The LCD screen is small, but the pixels can be made smaller, so the resolution is higher. For LCD TV, the resolution of 26 inches can reach 1366×768, while the plasma of 42 inches is only 853×480, and the highest pixel number is only 1024× 1024, which is quite different from that of 1366×768. If the plasma is to achieve 1366×768, it needs a size of more than 50 inches. At present, the most advanced LCD TVs, such as five products of Xoceco, have a 37-inch screen with a resolution of 1920× 1080. In terms of resolution and clarity, plasma is slightly inferior to liquid crystal.
Comparison results: plasma is not as good as liquid crystal.
Brightness PK: the liquid crystal effect is slightly better and the plasma display is even.
There is a great relationship between the clarity and brightness of TV images. If the brightness is insufficient, many details will be dark and you can't see anything clearly. The image of liquid crystal depends on the lamp on the back of the liquid crystal panel to form an image. Earlier, brightness has always been a big problem for LCD TVs. There are two ways to improve brightness. One is to improve the light transmittance of the LCD panel, but this is limited and there is not much room for improvement. Multi-tube technology has been widely used in new LCD panels, and the brightness has been greatly improved. Under the same parameters, the brightness effect of LCD is slightly better.
Because the LCD is transparent from the back, some LCD TVs have uneven brightness, so pay attention to it when buying, especially when the picture is completely black or dark. Plasma does not have this problem.
Comparison results: each has its own advantages and disadvantages, and it is tied.
Contrast PK: plasma wins
The clarity of TV images is also closely related to the contrast. At present, the highest contrast of plasma TV can reach 10000: 1, while the highest contrast of LCD TV can only reach 800: 1. An important indicator to measure the effect of TV is the performance of black. The more advanced the TV, the darker the black, the purer it is. In the performance of black, plasma is superior to liquid crystal, and good black is the embodiment of high contrast. There are also different voices about this. For example, Sharp thinks that the contrast test standards of plasma and liquid crystal are different. Plasma tests the brightness of a single pixel bulb, while LCD TV tests the brightness of the whole screen because of its small pixels. This data cannot be used for horizontal comparison. Although there is some truth in Sharp's statement, actual observation shows that plasma is indeed brighter and the contrast is indeed higher than LCD TV.
Comparison result: plasma wins.
Color number PK: The plasma color number is higher.
Since the plasma is spontaneous and the liquid crystal is transparent, the self-luminous color saturation of the pixel is of course better, and the displayed color types are also richer. Most LCD TVs are 65.438+0.667 billion colors, and a few can reach 65.438+0.07 billion colors, but plasma colors of 65.438+0.667 billion and 65.438+0.07 billion colors are rare, and 8.6 billion colors are not surprising, with the highest reaching 549 billion colors. Although too many colors have exceeded the number of colors that can be distinguished by human eyes, there is no doubt that plasma is richer in color than liquid crystal.
Comparison results: plasma is slightly better.
Perspective PK: evenly matched, both exceeding 170 degrees.
Because liquid crystal is back-emitting, light needs to pass through the gap of each pixel, which limits the direction of light radiation. When we watch, there will be an angle limit, which is what we usually call the perspective. The plasma emits light directly for each pixel, so there is no such problem. However, with the development of liquid crystal technology, the viewing angle now generally exceeds 170 degrees, and the highest is 176 degrees, which can basically be viewed in all directions. It can be said that the two are tied.
Comparison result: tied, tied.
Response speed PK: the response time of liquid crystal should be improved.
Because LCD TV relies on the rotation of the liquid crystal in the LCD panel to control the passage of light, and the rotation of the liquid crystal takes a reaction time, the picture will lag when displaying the motion state, which is what we call tailing. The lag time of LCD rotation is the response speed. With the present technology, the average LCD TV is between 16 ~ 25ms, and it can reach 8ms at the earliest. But 8 milliseconds still can't completely overcome the tailing phenomenon, especially when there is a big action picture, the LCD can still be seen. But the plasma emits light directly, so there is no such problem.
Comparison result: plasma wins.
Power consumption PK: LCD consumes less power.
Power consumption is a matter of great concern to everyone. It has always been popular that plasma consumes a lot of electricity and looks even like an oven in summer. However, the application of new technologies, such as Hitachi's 1024× 1024 screen, not only reduces power consumption and calorific value, but also prolongs service life due to the adoption of interlaced light display mode. The most interesting thing is the confrontation between Panasonic and Sharp on this issue. Sharp once compared a 37-inch LCD TV with a 37-inch plasma TV. Therefore, the power consumption of LCD TV is less than 200W, while that of plasma TV is about 300W W.. But Panasonic immediately retorted that its new technology can reduce energy consumption to the level of LCD TV.
However, it is undeniable that the temperature of the screen is lower than that of the plasma when the liquid crystal works.
Comparison result: LCD wins.
Residual image PK: liquid crystal beats plasma.
Each pixel of plasma directly emits light, and each pixel of plasma is equivalent to a small lamp tube. We know that the lamp will turn black if it is turned on for a long time. If the plasma plays a fixed image for a long time, it will leave a shallow trace on the screen, which is the afterimage. For example, if you watch a channel for too long, the logo in the corner of the screen may be branded on the screen, and you can still see its afterimage when watching other channels. Usually, continuous viewing of 10 ~ 20 hours will produce visible afterimages. Unfortunately, there is no perfect solution to this problem so far. Liquid crystals have no such concerns. Especially the current plasma screen is 16: 9. If you watch ordinary cable programs in 4: 3 mode for a long time, you will leave two traces on both sides of the screen. Because of the different working principles of LCD, LCD TV generally does not have the problem of afterimage, so in this round of competition, it can be said that LCD won completely.
Contrast result: liquid crystal beats plasma completely.
Service life PK: LCD makes people feel more at ease.
Flat-screen TV is always 12 thousand, so many people are most concerned about the service life. According to the most conservative statement at present, the life of plasma is not less than 45,000 hours, and the optimistic statement is 60,000 hours, while that of liquid crystal can basically reach 60,000 hours. So even if you watch 10 hours a day, you can watch 10 years or more. There's no need to worry. Moreover, no one can predict what new TV will be released in 10 years. Maybe LCD plasma will be eliminated again like CRT TV today.
At the same time, it should be noted that each pixel of plasma is a small lamp, and a pixel that is broken will not be repaired. There are two kinds of damage to liquid crystal, one is bad point, and each pixel of liquid crystal is a small switch of liquid crystal. If it is broken, it will form a bad point, which is also irreparable. The other is that the brightness of the lamp on the back is reduced or broken. In this case, just change the lamp.
Comparison result: LCD wins.
What is plasma?
Plasma state means that the electrons in the atoms of a substance are separated from the attraction of the nucleus at high temperature, so that the substance exists in the state of positive and negative charged particles.
In our daily life, we will encounter all kinds of substances. According to their state, they can be divided into three categories, namely, solid, liquid and gas. For example, steel is solid, water is liquid and oxygen is gas. Under certain conditions, any substance can change between these three states. Take water as an example. At standard atmospheric pressure, when the temperature drops below 0℃, water begins to turn into ice. When the temperature rises to 0℃, it will turn into ice.
What will happen to the gas if the temperature keeps rising? Scientists tell us that at this time, the atoms that make up the molecule split into independent atoms. For example, a nitrogen molecule (N2) will split into two nitrogen atoms (N), which we call the dissociation of gas molecules. If the temperature rises further, the electrons in the atom will be stripped from the atom and become positively charged nuclei (called ions) and negatively charged electrons. This process is called atomic ionization. When this ionization process occurs frequently, when the concentration of electrons and ions reaches a certain value, the state of matter will change fundamentally and its properties will become completely different from that of gas. In order to distinguish it from solid, liquid and gas, we call this state of matter the fourth state of matter, also called plasma.
In the vast universe, plasma state is a ubiquitous state. Most luminous planets in the universe have high internal temperature and pressure, and almost all the materials inside these planets are in plasma state. Solid, liquid and gaseous matter can only be found in dim planets and scattered interstellar matter.
Around us, we often see plasma substances. It can be found in fluorescent lamps and neon lamps, as well as in dazzling incandescent arcs. In addition, in the ionosphere around the earth, in the beautiful aurora, in the flash discharge in the atmosphere and in the tail of a meteor, wonderful plasma states can also be found.
What is the use of plasma? Oh! It has a wide range of uses. From our daily life to industry, agriculture, environmental protection, military, aerospace, energy, celestial bodies and other aspects, it has very important application value.
An important research is high temperature plasma and controlled thermonuclear fusion reaction. If the lightest element in matter, such as deuterium, is used to form a high-temperature plasma of tens of millions of degrees Celsius, then these nuclei will have a nuclear reaction. As a result, huge energy will be released, which scientists call thermonuclear fusion reaction. The hydrogen bomb is such an explosive thermonuclear fusion reaction. Humans hope to have a thermonuclear fusion reaction that can slowly release energy to generate electricity and build an "artificial little sun".
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 they can be used to develop new materials. For example, plating a thin layer of titanium on tools such as drill bits to improve the strength of tools, manufacturing solar cells, and plating a layer of material specially absorbing radar waves on the surface of aircraft to avoid radar tracking (that is, stealth aircraft) ... These are called plasma thin film technology.
In addition, plasma can also be used to remove sulfur from smoke and dust, irradiate seeds with plasma to increase crop yield, develop large-screen plasma TV sets, and develop plasma rocket engines to travel to distant universes such as Mars ... The applications of plasma are really endless.
The so-called plasma color TV PDP (P la Sma d isplay pan El L) is to fill a mixed gas between two thin glass plates, apply a voltage to generate ionic gas, and then discharge the plasma gas to react with the fluorescent powder in the substrate to produce a color image. Plasma color TV, also known as "wall-hung TV", is not affected by magnetic force and magnetic field, and has the advantages of slim body, light weight, large screen, bright color, clear picture, high brightness, small distortion and space saving.
Plasma (referred to as PDP) is a new generation of display equipment which adopts plasma flat screen technology. At present, there are two kinds of products on the market, one is plasma display screen and the other is plasma TV. There is not much difference between them in essence, the only difference is whether there is a built-in tv receiving tuner.
Because PDP was mainly used for commercial display in the early stage of development, there are still many PDPs that don't have built-in tv receiving tuners, that is, they can't receive TV signals directly. Therefore, if you choose this product, you can only use other devices such as satellite decoder or video recorder as TV signal tuning receiver, or you can buy another TV receiver. Now the plasma has been designed and produced for home users, and some of the plasma produced at present has started to be built-in tv receiver. These models are equipped with RF connection terminals in advance, which can directly play TV programs.
Most domestic PDPs are built-in tv receivers, such as Hisense, SVA and TCL. And foreign manufacturers, some products use external TV receivers, and some products use built-in tv receivers. Generally, the PDP of external TV receiver is called plasma display screen, and the PDP of built-in tv receiver is called plasma TV. When purchasing, you should ask whether it has TV reception function.