The emerging display technology represented by LCD, PDP, DLP and LCoS represents the development direction of TV technology in the digital TV era of Danning, and is destined to become the terminator of CRT TV. Digital TV, especially high-definition televisions, is also destined to become the trend of world TV development. With the development of China's economic level, especially the opportunity to cater to the 2008 Beijing Olympic Games, the time when HDTV shows appear around us is not far away. The advantages, disadvantages and prospects of the four emerging display technologies of LCD, PDP, DLP and LcoS will be introduced below.
LCD - LCD TV
Compared with traditional CRT TVs, LCD TVs have many advantages: 1. High display quality, no flicker; 2. No electromagnetic radiation; 3. Good picture effect, no distortion, true flat display; The screen size is scalable. At present, the largest LCD display can be as large as 65 inches, but it can be used on digital cameras and mobile phones. Its volume and weight are much smaller than CRT. 5, high definition, can really achieve the effect of HDTV; 6, digital working mode, more perfect performance of digital image signals; 7, power consumption is small, only 1/10 ~ 1 / 7 of the same area CRT TV.
Compared to PDP TVs, which are also members of flat-panel TVs, LCD TVs also have some advantages that PDP TVs do not have:
Longer life, PDP monitors have a nominal life of 25,000 to 30,000 hours, and are unrecoverable, which is inferior to LCD monitors of 50,000 to 75,000 hours (recoverable by replacing the backlight) ;
It consumes less power and saves power than PDP color TV;
As an important product of 3C industry integration, LCD TV has attracted the participation of many IT manufacturers and home appliance manufacturers, which will help reduce the cost of LCD TVs and expand the market.
PDP - plasma TV
In the flat-panel TV family, in addition to the LCD, it is the PDP. PDP, the plasma display, is one of the latest display technologies after LCD. PDP belongs to the "self-illuminated" flat display technology. The core principle is similar to the principle of fluorescent lamp illumination. In the vacuum glass (ie, the discharge space), an inert gas is injected, and then the applied voltage is applied to discharge the gas in the tube, and the ion effect is applied to release the ultraviolet light, and the irradiation is applied to the glass. Phosphors on the tube wall, the phosphor will be excited to emit visible light, and different phosphors will be excited by different colors of visible light.
As a self-luminous display technology, PDP does not require a background light source, so it has the problem of viewing angle and brightness uniformity of the LCD display, achieving high brightness and contrast, and the three primary colors sharing the same plasma tube also makes it Convergence problems are avoided and very clear images can be achieved.
From the current technological development point of view, PDP has a huge advantage in screen size. In January 2004, Samsung announced the successful manufacture of an 80-inch PDP panel. The thickness of this 80-inch (1766mm & TImes; 1128mm) PDP is only 89mm. The standard resolution of 1920 & TImes; 1080, fully meets the resolution level of high definition television. It has a brightness of 1000 nits and a contrast ratio of 2000:1, which is a drawback of the fact that the brightness and contrast of large-size PDPs cannot be optimal at the same time.
In addition to the advantages of brightness, contrast and viewing angle, PDP technology also avoids the response time problem in LCD technology, which is a crucial factor in dynamic video display. Therefore, from the current technical level, the advantages of PDP display technology in the field of dynamic video display are more obvious, and it is more suitable for use as a television or home theater display terminal. The PDP also has the advantages of ultra-thin, light weight, wide viewing angle (greater than 1700), and the PDP is also a complete digital drive, a true "digital" TV.
Unlike several other emerging display media, the PDP can only be used as a direct-view TV. It cannot be used as an image source for projection TVs like LCD, DLP, or LCoS to provide a larger picture. Since the PDP is composed of millions of LED tubes, the power consumption is very large. The 42-inch model often consumes more than 300W. The heat dissipation problem is one of the biggest problems, and its service life is also the shortest among several emerging display technologies. And, if damaged, it cannot be repaired. Because the glass on the plasma display is extremely thin, its surface is fragile, and it cannot withstand too much atmospheric pressure change, and it cannot withstand unexpected heavy pressure.
South Korea's large-size PDP panel production has an advantage in the world PDP industry. Although the Japanese PDP industry slightly lags behind in the development of the largest display panel, it is the most complete in the PDP product specifications of 37 to 50 inches, and is in the upstream of the PDP manufacturing industry.
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