Introduction to PDP TVs
PDP body technology began to appear in 1979. AC surface discharge color PDP TVs had a history of 27 years in 2006. Its technology and performance have been After gradual improvement and improvement, a 21-inch full-color PDP TV (pixels 640×480) was developed in 1993. In 1996, a 42-inch widescreen PDP TV with 852×480 pixels and a display capacity of 16.77 million colors was produced.
With the research and broadcast of digital TV in the United States, Western Europe, Japan, South Korea and my country, in order to meet the needs of digital high-definition TV, a 42-inch 16:9 PDP body TV was launched in 1998 , pixels are 1024 × 1024, 1280 × 720 and 50-inch 55-inch PDP body TVs with physical resolutions of 1366 × 768 and 16:9.
In order to cope with the challenge of LCD in large screen size, the competition to improve the screen size of PDP TV has never stopped. In October 2003, LG launched a 76-inch PDP screen. Within three months, Samsung exhibited an 80-inch PDP TV. By December 2004, Samsung exhibited a 102-inch PDP panel. In 2005 In February of this year, Samsung launched a 102-inch PDP TV with a physical resolution of 1920×1080. Now Panasonic has launched a 103-inch PDP TV and is on the market.
The working principle of PDP TV
As far as the working principle is concerned, PDP TV relies on high voltage to activate a special gas in the imaging unit, causing it to produce ultraviolet rays to stimulate the phosphorescent material to emit light; LCD TVs use current to change the structure of the crystals in the thin film transistors of the LCD panel to create images.
In terms of imaging technology, PDP TVs use advanced "point-to-point" digital display technology, which has a low loss rate in picture reproduction.
From a technical point of view, since the light-emitting PDP tubes are evenly distributed in the plane, the center and edge of the displayed image are completely consistent, and the distortion is not obvious. And because its display process does not require the help of electromagnetic fields, external electromagnetic fields will not interfere with it, and it has good environmental adaptability.
PDP is a self-illuminating display technology that does not require a background light source, so there are no viewing angle and brightness uniformity issues. The design of using the same PDP tube for three-color phosphors also avoids focusing and convergence problems, and can achieve very clear images.
The main features of PDP TVs
(1) PDP TVs, like CRT TVs, use the self-luminous principle of R, G, and B phosphors, so they have the same characteristics as CRT TVs. characteristics. High contrast, good color reproduction characteristics, vivid images and excellent image quality.
(2) PDP TVs are inherent resolution TVs that display images in pixels and display images in an addressing manner. This is the same as LCD. They are both flat TVs, so they have flat TVs. The machine is light and thin.
(3) Among the current display devices, only PDP and DLP can achieve full digitalization and do not require D/A conversion display devices in signal transmission and display. Therefore, it also has the advantages of digital TV display, also known as PDP, which is a digital CRT. Therefore, PDP has large development space and application prospects in digital TV.
Advantages of PDP TVs
(1) PDP TVs are relatively easy to achieve large and ultra-large screens
If 36 to 80 inches is called a large screen , for ultra-large screens of 80 inches or more, PDP is easy to implement and adapts to the requirements of large digital TV screens and HDTVs. Although LCDs are currently 65 inches or larger, the yield is low and the price for large screens is more expensive than PDP.
(2) Large viewing angle
It has the widest viewing angle among flat-panel TVs, up to more than 160°. In other words, the audience can see the widest viewing angle in different positions. The brightness, contrast and chroma of the image basically change little, which is close to the viewing angle of a CRT TV, but smaller than that of a CRT and much larger than that of an LCD TV.
(3) The response time is small, the trailing time of moving images is short, and the dynamic definition is high. Better than LCD TVs and equivalent to CRT TVs.
(4) PDP does not use backlight like LCD, but uses R, G and B three-color phosphors to self-illuminate like CRT, which has many features
Although the brightness is Not as high as LCD, but it changes with the change of average picture level (APL). When APL is high, the image is displayed brightly, and when APL is low, the image is displayed darker, so the contrast is high, the image has a strong sense of layering, high definition, and the displayed image is bright. , bright, soft and natural; large color gamut coverage, good color restoration characteristics, bright colors and strong saturation of the displayed image, matching the image displayed by CRT; good full-screen brightness uniformity; because it is not limited by the life of the backlight lamp, Longer life.
(5) Achieve full digitalization
Among direct-view TVs such as CRT, LCD, and PDP, only PDP TVs can achieve full digitalization, that is, end-to-end transmission process , all are digital signal processing, without D/A conversion, there will be no signal distortion and loss of image information, which will reduce the image quality; while the brightness or grayscale of the images displayed by CRT and LCD are all controlled by analog voltages. Therefore, the transmitted digital signal must be D/A converted, which will cause signal distortion and information loss, resulting in degradation of image quality. Therefore, it can be said that PDP TVs have broad application prospects as digital TV display terminals.
(6) PDP TV has the advantages of flat-panel TV
It is flat, thin and light, and can be suitable for wall-mounting; it adopts progressive addressing and high field frequency display. The image has no interline and large-area flickering; the grating has no geometric distortion, the center of the screen has the same clarity as the edge, and the full-screen color is pure; the grating position and tilt are not affected by geomagnetism; it is explosion-proof, radiation-proof, and safe.
(7) Dynamic power consumption
When displaying high-brightness images or all-white field signals, PDP consumes relatively large power; but when displaying images with normal brightness, such as in average If the image level is 40 to 50%, the power consumption of PDP is not much different from that of LCD. If the average image level is below 30%, the power consumption of PDP is still lower than that of LCD. Because the power consumption of PDP changes with the average picture level (APL) of the displayed image, when the APL is low, that is, when the picture is dark, the power consumption is small; while the LCD does not matter whether the picture is bright or dark, because the backlight is always on, the power consumption is basically the same. It's the same as above. For example: when watching the "Lord of the Rings" movie on the same 37-inch PDP and LCD TVs, the PDP consumes 159W of power and the LCD consumes 280W.
The difference between PDP TVs and LCD TVs
(1) PDP is a product made for television, while LCD is a product made for information display
TV products must meet the basic requirements for people to watch sports pictures: accurate movement focus and no tailing (tailing is not clear on the surface, but in fact the most important thing is that TV tailing makes the eyeballs tired, which is the main cause of myopia) The reason is that the human eye always adjusts to see clearly when viewing objects. Long-term fatigue focusing will deform the ciliary muscles of the eyeballs. Just like an auto-focus camera, if the focusing system is not in place, the image will be blurred, thus forming Myopia), images with multiple gray levels, true color restoration, clear color gradation and other mandatory standards.
In the nearly century-long history from the discovery of the LCD phenomenon to the invention of LCD displays, LCDs have been widely used in static display fields such as electronic watches, electronic instrument displays, handheld computers, notebook computers, and desktop computers.
(2) PDP is more suitable for watching digital TV and movies, and LCD is more suitable for watching downloaded movies and discs with a slower pace and higher signal format
In the future, China will fully open digital signals , PDP can directly convert digital signals without any conversion (A/D, D/A), allowing users to see authentic digital TV. Especially for various sports programs, action movies, etc., PDP has unparalleled advantages.
South Korea has the highest LCD output. South Korea has always been inferior to Japan in the field of traditional CRT TVs, so South Korea regards computer LCD monitors as its main development target. As the size of LCD increases, it begins to enter the TV field. We have found that it is generally very comfortable to watch Korean romantic dramas on LCD. That is because these programs have a slow pace and bright and vivid colors.
How to choose a PDP TV
(1) The screen size must be satisfactory
Thin and large screens are the inherent advantages of PDP.
PDP is a display technology that uses gas discharge and its working principle is very similar to that of fluorescent lamps. The reason why PDP TV has become the first choice of many consumers is that its most prominent feature is that it can achieve a large screen while being ultra-thin. Products above 42 inches can usually control the thickness within 10 centimeters. The thin and light appearance makes its advantages more obvious, especially suitable for wall-mounted large-screen TVs. The popular size of large-screen PDP TVs is mainly 42 inches.
Currently, Changhong and others, as major manufacturers of PDP TVs, have launched large-scale large-screen PDP TVs of over 50 inches on the market, expanding the mainstream size of the market. A large screen, a wide field of view, and an exterior design that incorporates fashionable home styles have become the first choice for fashionable people. Changhong also uses the advanced Samsung SDIW1PDP screen in its main technology. It not only has excellent screen effects, but as a domestic brand, its affordable price is also eye-catching. Once launched, it has been enthusiastically sought after by consumers for its high cost performance.
(2) The color and picture quality should be full
The main technical indicators of PDP TV are: resolution, brightness, contrast and viewing angle. These factors together determine the picture quality. The quality is good or bad.
Be sure to pay attention to the resolution when buying a PDP TV. Currently, PDPs on the market are divided into standard resolution (SD) and high resolution (HD) according to different resolutions. Although standard resolution can meet the requirements of current TV signals, with the rapid development of high-definition digital TV signals, it is more suitable to have a high-resolution PDP screen.
Color is also a technical indicator that should be paid attention to when purchasing. Achieving high contrast and high brightness at the same time means that the color of the picture is fuller and the picture quality is brighter and clearer. At present, the own engine technology of several major Japanese and Korean manufacturers can achieve high image quality. Among domestic brands, the Changhong brand that uses Samsung's SDIW1PDP screen can also achieve high-definition image quality.
Here, it is particularly worth mentioning that the Changhong PDP screen has four major advantages: greatly enhanced contrast, low-reflective technology and complementary color technology to improve contrast; reducing halo effects, and the image outline is clearer ; Use patented software algorithm to accurately reproduce moving images; 550 billion color display capability, more realistic colors and more delicate pictures.
(3) Response time is the main reference indicator
Response time is also the main reference indicator for consumers to purchase flat-panel TVs. In this regard, PDP TV has significant advantages. The current mainstream response time of LCD TVs is 4 milliseconds, while PDP TVs use self-illumination technology and the response time is much shorter. The PDP TV set launched by Changhong has made a major breakthrough in motion picture quality. The advanced noise reduction technology enables the accurate positioning of interference areas and reduction of motion image overlap (false contour) when reproducing picture quality. The response time is close to the speed of light, and The CTR is equivalent and there is no tailing phenomenon.
(4) Excellent sound quality must be shocking
Excellent picture quality must be accompanied by pure sound quality to make the picture feel radiant. When purchasing, don't forget to pay attention to whether the PDP TV has a complete sound system. Changhong's seven-band equalizer, Samsung's two-channel speakers, Panasonic's ultra-thin subwoofer audio and video, etc. can all provide extraordinary sound quality and create a perfect home theater effect.
(5) Personalized design should be fashionable
PDP TVs are particularly favored by the personalized needs. For example, Changhong’s PDP screen circuit is particularly miniaturized, which not only makes the TV appearance smooth and structurally Simplicity, the most important thing is to enable products to save energy, which is almost the long-standing dream of the industry: ultra-low energy consumption. The biggest advantage of Changhong PDP color TV is that it can save more energy consumption and expenses than similar products.
(6) Multi-function interface is a must-have
When purchasing a PDP, you have to consider the support for high-definition TV in the future. Therefore, a high-definition multimedia interface (HDMI ) PDP TV is the suitable choice. The HDMI port of Changhong PDP color TV allows you to easily enjoy the pure video and audio signals of various digital devices. The digital high-definition picture quality and perfect sound quality of various HD devices are presented to you one by one.
(7) The price/performance ratio must be satisfactory
PDP TV has many advantages, and with the sharp decline in prices, many consumers have already moved or are preparing to move it home. At present, the lowest price of 42-inch PDP TV has dropped to less than 10,000 yuan.
We know that the price of foreign brand PDP TVs is obviously higher than that of domestic brands, which is also the main concern of many consumers when purchasing foreign brands. In fact, the current major domestic brands have adopted advanced Japanese and Korean technologies in the main PDP technology, such as Changhong's SDIW1PDP screen. The same quality and affordable price make the overall cost-effectiveness of domestic PDP TVs more outstanding. When purchasing a PDP TV, you must grasp the scale of consumption: pay attention to technology, but also choose the price wisely. As long as you master this standard, it is not difficult for ordinary families to move a home theater home.
(8) Pay attention to the service life
Every product has a service life, and PDP TVs are no exception. This alone is most easily ignored by consumers. Changhong's small circuit board-shaped SDIW1PDP screen greatly reduces the power consumption of the product, which naturally greatly extends the service life of the PDP TV, reaching 60,000 hours. If you watch it for 8 hours a day, it can be used for 20 years.