One, the display principle
Plasma PDP. is through the plasma chamber of high-voltage discharge to stimulate the screen phosphor luminescence to display the image, through the control of the voltage of each chamber and the energized situation to display different colors, that is, very much like our original CRT TV, except that the CRT is achieved by bombarding the screen phosphor light through the electron gun. The original CRT TV, except that CRT is realized by bombarding the phosphor on the screen with an electron gun to emit light. To put it more simply, each dot of a plasma TV emits the light needed to display the picture when needed.
Liquid Crystal LCD: It is the backlight that displays the image, imagine it like this. Please like we watch film movies, each LCD pixel, like a small window, there is a door, you can open to close, when the door is open, we can see the light, that is, the light behind. But the actual principle is much more complex, in fact, the backlight level deflection, so we can see different colors of the pixels.
Two, service life
Plasma: the latest products now support 100000 hours of cumulative use time. That is, the screen brightness decay to 50% of the time. Equivalent to 12 hours a day watching TV, you can watch more than 20 years.
LCD: Since LCD is realized through the backlight to display, so. The life of the backlight is very important, most are now using the lamp to do backlighting light source (a screen with multiple lamps), if the lamp's brightness is low or discoloration (such as yellowing, red, such a phenomenon of people who have used the laptop will know), in fact, the whiteness of the LCD will be the same reduction. Now there is a backlight is used in the LED light source, the life of this light source is longer, the light purity is higher, but look at your color preferences. In this way, it can be used for more than 10 years. And you can replace the backlight to extend the life, the price is not cheap.
Three, the problem
Plasma:
1. Residual image, the initial plasma products, there will be a long time to display the same screen, the image of the residual image will remain on the screen can not be removed, which seriously affects the quality of viewing. Now the new screen has basically solved this problem, and then with the use of the process do not too much, too long to use the static image of the fixed screen, can be solved, CRT TV also has this problem.
2. Pixel is not high: due to the limitations of the production process, before 2007, 42 inches of the following products, there is no full HD resolution screen, and now (Panasonic, Toshiba, etc.) there are two generations of 42-inch 1920X1080 screen appeared. Larger screens are easier to realize full HD. But now there is no full HD plasma screen under 42 inches has appeared.
3. Brightness: Because it is the principle of self-illumination, there is a limit to the brightness. This is not as good as liquid crystal products, but to meet the normal viewing is no problem.
4. Bad spots (dark spots) in the three primary colors of light, there is a bad spot problem, the general bad spot at the edge of the screen and less than 5 or less does not affect the basic viewing.
5. Technology is closed, in the hands of a few factories, not open, the market is not enough to compete.
Liquid crystal:
1. Dragging: also subject to the constraints of the principle of liquid crystal display, liquid crystal every update to the color of the display point, is to take a certain amount of time. The original product, the response speed of 16MS, one in the new product can reach a minimum of 2MS, the lower the value, the smaller the shadow dragging. But the fundamental solution, the possibility is very small.
2. Display a limited number of colors, due to the LCD is dependent on the bias light to achieve the picture, digital control, so the number of colors is limited.
3. Large screen size is difficult. Now the liquid crystal products are only 65 inches below the product, which is determined by the production process.
4. Poor black performance, because the backlight can not be completely covered, so, not like plasma, all black.
5. There will be light leakage phenomenon, that is, when the full black screen, see the backlight through, affecting the viewing effect.
6. Poor dynamic clarity, the best LCD can reach 600 lines is very good.
7. Bright spot: LCD screen there is a bright spot problem, this is a manufacturing problem, can not be repaired, but less than 3 bright spots below, will not affect the viewing.
Four, the advantages:
Plasma advantages:
1. Dynamic picture clarity is high, now Panasonic 50-inch screen, through the actual test, can reach 1000 lines (horizontal) dynamic display level.
2. High contrast ratio, excellent dark performance, because the dark place is not light, can show the effect of blacker.
3. Power consumption is a dynamic situation, generally labeled 550W plasma TV, is expressed in all-white canvas power consumption, that is, the maximum peak power consumption, the general use of just about two-thirds of its highest labeled value.
4. High contrast ratio, can display countless colors. Because of the display principle, it can theoretically display countless colors.
5. Suitable for the manufacture of larger screens, and cost advantage. Now the largest plasma screen is more than 100 inches.
Liquid crystal advantages:
1. Can achieve high definition on a smaller screen, now 32 inches and the following products have long been achieved full HD products 1920X1080.
2. Display bright colors, static images gorgeous, clear. High brightness.
3. Lower prices for the same size, 40-inch products with the same specifications are generally lower than plasma products.
4. Widespread competition among companies, the market is mature.
Summary:
1. If you just want to use to watch the current cable TV, I'm sorry, there is no need to buy both, it is best to use CRT TV, bright and clear, mature technology. Because now the big screen TV with cable TV clarity does not match at all, can not be displayed perfectly, will feel the display much worse.
2. If you have to buy a big TV (face, decoration, others have, money and not much, and want to big screen), and to see the TV-based, it is best to buy a plasma TV, it is best not to buy a full HD, you will find that you compare the cable TV, the more the resolution of the plasma TV is not high, looking at the more clear, this is because their display pixels are closer to the plasma display particles, the dark zone The reason is that their display pixels are closer, the plasma display particles are larger, and the dark areas are fewer. (Note: Due to the discharge and insulation reasons, each pixel to be spaced between the pixels, under the same conditions, the fewer pixels, the fewer intervals, the higher the brightness)
3. If you want to use to connect to the computer, but also to the use of computers and games are the main. It's best to get an LCD TV. Because LCD has a good, gorgeous static picture with vivid colors.
4. If you want to watch high-definition movies, connecting the computer is also mainly high-definition movies. Then I strongly recommend that you buy a full HD plasma TV. Its contrast ratio, dynamic clarity, viewing comfort, are far better than LCD.