【 Weak current College 】 four new HD display contrast between good and bad---Power By 【 China power house network 】

LCD TV and traditional CRT TV, LCD TV set has many advantages: high quality 1, display, flicker-free; (2) no electromagnetic radiation; 3, picture effects, no deformation is real flat screen displays; 4, screen size scalability. Now the largest LCD screen can be large to 65 inches, smaller but you can use to digital cameras and mobile phones. Its size and weight are many smaller than CRT. 5, high definition, true HDTV results; 6, digital lifestyle, more perfect performance on digital image signals; 7, power consumption of only the CRT television set with an area of 1/10 ~ 1/7.

Relative to the same flat panel TV, PDP TV is a member of the LCD TV, PDP TV, some of the advantages:

1. the service life is longer, PDP monitor's nominal life most 2.5 million ~ 3 000 hours, but are unrecoverable, and LCD monitor's 5, 000 ~ 7.5 million hours (you can replace the backlight tubes recovery) compared to comparable to many;

2. the PDP TV power consumption is lower, less power consumption;

3. the LCD TV as an important industrial fusion 3C products that attract many IT vendors and home appliance manufacturer's participation, will contribute to lowering the cost of the LCD TV will make a big market.



In flat-panel TV family, apart from the LCD, the PDP. PDP, plasma displays, LCD after one of the latest display technology. PDP is "self-luminous" flat display technology. core principle and the principle is similar, fluorescent lamp light in a vacuum glass (i.e. discharge space) injection of the inert gas, then the use of voltage application, so that the gases generated in the application of the discharge and release the ion effect, exposure to UV coated glass tube wall of phosphor, phosphor will be fired out of the visible light, and different phosphor will be fired in different colors in the visible region.

PDP as a self-luminous display technology, without the need for background lighting, LCD monitor's angle and brightness uniformity problems, achieve higher brightness and contrast, while the three primary colors share — a plasma tube-based juice also avoids the convergence problem, you can achieve a very clear image.

From the current level of technology development, PDP screen size has a huge advantage, in January 2004, Samsung announced that it successfully produced 80-inch PDP panels, this 80 inches (1766mm×1128mm) PDP of thickness of only 89mm, standard resolution 1920 × 1080 full high-definition television resolution level. It has 1000nits brightness and contrast of 2000: 1, a change in the past, large PDP brightness and contrast not optimally.

In addition to the brightness, contrast and Visual angle advantage, PDP technology also eliminates LCD technology in response time, and these characteristics are dynamic Visual display of the crucial factors. Therefore, from the current level of technology, PDP display technology in the field of dynamic video displays obvious advantages more, more suitable as a TV or home theater display Terminal. PDP also has a slim, light weight, wide angle (more than 1700), etc., and use of the PDP is fully digital drive way, is the real "digital" TV.

And several other emerging display media, PDP-only as look TV, cannot like LCD, DLP, and LCoS Projection TV as an image source to provide more huge screen. Due to the PDP by millions of light-emitting tube, so power consumption is very large, 42-inch models often power consumption up to 300W and above, the thermal problem is one of the biggest problems, its service life in several emerging display technologies also is the shortest, and — Dan damaged beyond repair. Due to the plasma display is extremely thin on the glass, its surface is fragile, cannot bear much variations in atmospheric pressure, unable to bear the weight of the accident.

Korea's large size PDP Panel production in the world take advantage of the PDP industry, Japan PDP industry although maximum display panel development lag slightly, but in 37 ~ 50-inch PDP product specification is the most complete, PDP manufacturing industry upstream.



LCoS, abbreviation for LiquidCrystalonSilicon, i.e. Silicon LCD, is a new digital imaging technology, the base image is similar to three-chip LCD technology, but using LCoS technology projector its rays not through the LCD Panel, instead of using reflection pattern formation of color images.

It is coated with liquid crystal silicon CMOS integrated circuit chip as reflective LCD substrate, with advanced technology for grinding of flat after plating on aluminium as a mirror, the formation of CMOS substrate, and then set the CMOS substrate and contain transparent electrode on glass substrate lamination, then injected liquid packaging. LCoS will control circuit is placed in the back of the display device, you can increase the light transmission rate, so as to achieve a higher light output and higher resolution.

From a technical perspective, in the emerging display media, PDP's prospects most bleak, there are limitations, but the most promising is the DLP and LCoS. The current technological development, LCoS mature as much as a DLP.

First of all, LCoS display technologies involves several high technology frontier areas, mainly in VLSI design and process technology, LCD related technology, optical engine technology, new optical disc technology, image processing-related technologies, and therefore no one company can learn all the key technologies. The DLP technology is mature, have large numbers of ordinary civilian occupation video area, resolution at 1024 × 768 standard DLP product price is very low, in2048 × 1024 level of DLP has also been able to supply the market, although due to price factors currently mainly used in digital cinema show, but as 4000 × 2000 level of DLP applied to digital cinema show, 2048 × 1024 levels of high definition TV projectors are also available. Secondly, the LCoS high-resolution large-screen high-definition picture quality also cannot be demonstrated, and DLP mature technology far than does. In the LCoS projection systems, optical engine, mechanical structure, systems, circuits and LCoS chip itself of any defects that affect the display of the image. Third, LCoS micro monitor development and production is not a uniform standards, industry chain has not yet fully formed, new technology, industrialization, joint processing, technical programme changes, etc., makes the LCoS system of low-cost advantages have not reflected. Although in theory in the resolution, brightness, and other functions that match case, three chip LCoS projection system cost can be less than the single-chip DLP projection system price, but the distance there is the long way to go.

In the emerging display technologies, can be clearly divided into two camps, PDP and LCD is a technology direction, focusing on the display itself. DLP and LCoS represents another direction, they jumped out of the development of the display shows the frame of the media, based on the micro-chip manufacturing techniques, technology and cost clearly and it is not in a hierarchy. Therefore in PDP and LCD to Korea, Japan and China Taiwan three times, United States of TI DLP is unique to the company it is not surprising, after all, in the field of chip manufacturer or United States. At present, there are dozens of companies in the positive development of LCoS micro-display technology, but only Sony, JVC, Philips and Hitachi have a small amount of product launch.

As with DLP, LCoS on large-screen high-definition TV market with unlimited potential, while at the same time as the LCoS micro monitor small size, low power consumption, easy for low-temperature stabilization, in various military helmet-mounted display aspects can replace earlier miniature CRT. In the field of near-eye monitor, has a unique advantage. Near eyes monitor is a special application orientation and market, target products including HMD HMD, mobile video, wireless network Terminal, wearable computer monitors, etc. In the military, medical, entertainment and other fields, LCoS technology monitor potential of micro-content will form all types of portable high definition display technology core.

Other emerging display technologies Outlook

OLED, which is the light-emitting diode, also called by many manufacturers, Sony OEL is called organic EL. OLED is called next generation flat panel display technology, now 2 inch or so of the finished product has already begun in digital cameras and mobile phones and other products are applied, but wants to launch a TV area, as well as mature consumer goods for some way to go.

OLED TVs don't need LCD TV required light source with high definition plasma TV, but thinner, even the screen can be made up of thick volume 1mm. This kind of TV materials cheaper, you can use plastic, polyester film or film as substrate, and do not need light source, the future price must be less than the plasma TV and LCD TV.

Currently, Sanyo has produced using OLED screen cell phone; Sony has also been developing OLED TV, announced that it will launch in 2005 13 inches or so sample. In 2003, China's Taiwan region IETECH company successful production of the 20-inch OLED display, allow people to see the OLED area in the large-screen display.

FED, field emission display technology, but also by many manufacturers optimistic about the future of a large-screen display technology, is a relatively long history but progress is relatively slow display technology. As early as 1928 field emission theory put forward by the electrode until 1968 only started a field emission electrodes applied to monitor research, 1991, the first FED monitor product from a company in France.

The technical principle is similar to the display of the CRT by cathodic electrons hit screens from the River. Just FED in the cathode ray tube is Catholic field emission array, sothe plane in place of the monitor by plane cathode and fluorescent display of two parts, realizing a graphic display. FED to achieve a flat panel display of the light structure, but has inherited the CRT's high performance, you can achieve high brightness and high response speed, true-color, wide vision, while avoiding the CRT of electromagnetic radiation and x-ray radiation.

In 2002, Samsung has developed a 32-inch FED Panel, the same year was showcased-Mae e-40 inch FED Panel, 2003 Motorola successfully developed using carbon nanotube FED Panel, in addition to the already published 15 inch samples to intensify the trial 30-inch product, in the production of more than 30-inch large-size panel modules, compared with LCD Panel, you can reduce the cost of approximately 30%, the FED has also started a big-screen application process.

GLV display system, namely, "the conductor-light valve" imaging system, is a new high precision electro-optical modulator. Development by the United States, because of the CLM company financial distress in 2000 and transferred to Sony. GLV conductor-light valve is relying on static electric driven micro-mechanical components, on the incident light intensity and reflection direction control devices that belong to the "computer electronic system". GLV is a linear array-type silicon chip device that can only produce a vertical array of pixel, you want to become a graphic image also rely on optical scanning methods. TV image how many vertical pixels by GLV linear device number of pixels, Sony of GLV is 1080 pixels into vertical column of the screen device. Will this group through 1080 GLV grating laser belt with optical Prism horizontal rotation is projected onto the screen,Can form a 1920 × 1080 high-definition television images.

The number of horizontal pixels by grating the TV signal lines of pixels. GLV each chip has a length of 20 μ m, a width of 5 μ m. GLV grating modulator structure is relatively simple, using different projection light path, you can make up the difference with the plasma TV thickness not large rear projection television, can also be made of orthography device, but for now this technology is still at the experimental stage.

Emerging TV will disappear by the the nouns

In the emerging display media, many of the concepts or even disappear, in CRT TV publicity for some businesses continued hype, some enthusiasts revel in the the nouns, will no longer exist.

Progressive scan: this term is a CRT TV's proprietary nouns, LCD, PDP, DLP, or LCoS these emerging display media, image transmission and display is the whole image, not the so-called line structure.

Magnetization: is the concept of CRT TV exclusive, LCD, PDP, DLP, or LCoS, don't have to worry about the magnetized.

Geomagnetic correction: for big screen CRT television set, because the effect of placing the geomagnetic field, when asked to consider direction, otherwise the image will occur a number of issues that affect the normal view, better TV with geomagnetic correction

Physical flat-screen television for CRT in so-called flat screen state, almost all television sets are pillow-type distortion and convergence to the problem. And LCD, PDP, DLP and LCoS these emerging TV is flat, congenital defects do not exist above.