LCD Backlighting For HDTV

LCD is winning the race to be the dominant display technology for HDTV. According to DisplaySearch, in 2007, the market for LCD (liquid crystal diode) TVs was estimated at $ 27.4 billion euros. LCD TV shipments rose faster than expected 52% year on year in the second quarter of 2008 to nearly 7.5 million units (79.8% of total sales of HDTV).

The LCD screen on an LCD HDTV is a selective light filters. It is not in itself emit light, but selectively filterLight through the display from behind. Most HDTVs have either offer a single sheet of luminescent plastic or side lighting with fluorescent lamps for the backlight. Both techniques are difficult to control.

Many consumers focus on the screen resolution when selecting a High Def (HDTV) system. Is the HDTV 720p, 1020i or 1020P? However, when a group of experts, the SMPTE (Society of Motion Pictures and Television Engineers), recently on the importance of the screenResolution, so the fourth rank. The SMPTE Rank contrast ratio, color saturation, color temperature and grayscale before the screen resolution in importance. The Imaging Science Foundation to a similar conclusion. Backlight is the key component for improving the contrast ratio and grayscale.

It is important that an LCD system allows for adjusting the height of the backlight, and preferably, this function automatically. This improves the contrast of the image. Areduced brightness of the backlighting reduces power consumption and extend the life of the lamp, as the power used and the lamp life is directly related to the brightness of the backlight in context. A lamp with 50,000 hours life at 6 mA may be a 30,000 hour lifetime, if the current 7 mA, only 1 milliamp higher (example: Sharp Electronics LCD) display.

Another important factor in the choice of the backlight is the light of the "fuzziness". Blur occurs when there is rapid movement into the programming,such as sport. If the picture changes rapidly, the pixels can lay in the reaction. Effective backlighting engineering can be a significant reduction of strobe the backlight, so the individual pixels will be no longer than necessary on. Examples of this technology are Philips' Aptura "and the Samsung" LED Motion Plus. "

Sidelight

With side lighting, the lighting on the back of the LCD panel is located, and create buttons on each side lighting. ToLight more uniform, a light diffuser between the lights and the rear of the optical filter module is located. Most LCD systems with fixed light use cold cathode fluorescent tubes (CCF) lamps. This technology offers a very bright white light. The lifetime of the lamps) is usually between 10,000 to 20,000 hours (6-12 years at a rate of 5 hours use per day.

The main disadvantage is that the intensity of the light will not vary locally, and side-light can not look uniform. SomeCCF lamps contain mercury. This is an ecological disadvantage.

The main disadvantages:

The intensity of light can not be varied locally. This leads to a lower contrast image.
The light is not uniform.
Some CCF lamps contain mercury.

Conventional backlight

Most of the backlight is performed with a single sheet of electroluminescent plastic. These plates can age (although improvements have reduced this problem in this area). Electroluminescent backlight panelused to produce colored light phosphor. Shows using this technique can be thin and light and provide uniform light distribution.

The main disadvantages:

Limited life span from 3000 to 5000 hours to half brightness (2-3 years) at a rate of 5 hours use per day.
The intensity of light can not be varied locally.

LED backlight

LED-backlit display uses an array of LEDs can be controlled individually to provide a very good control. In this configuration, a largeNumber of LEDs are mounted uniformly behind the display. Improvements in LED brightness, they have more practical for backlighting. NEC pioneered this technique with the monitor, which 2180WG. Other companies such as Samsung, have recently versions of this technology. This should push prices down (the Samsung model costs less than 1 / 3 the price of a comparable NEC monitor).

This system offers local dimming technology and a dynamic contrast ratio of 1,000,000:1 reach. Trueactual black levels (the "Holy Grail" of the LCD) will be reached by turning off a pixel source. This can eliminate the typical gray-black screen for many LCD HDTVs. Groups of LEDs can be controlled locally, so that produce more light, making the brightness when necessary.

The problem with conventional white LEDs is that their spectrum is not ideal for photographic reproduction, because they are basically blue LEDs with yellow phosphorus at the top are. Their spectrum has two peaks on aA blue and another in yellow. White LEDs, which are based on a group of red, green and blue LEDs based on the RGB color filters, an LCD is ideal and can result in the saturated colors. Sony's "Tri-color LED backlight system is an example of this technique.
Sometimes, these HDTVs have a number of LEDs on the top and bottom of the screen. This improves the brightness and color reproduction and enables an almost complete uniformity across the display.

LED-backlit display are muchefficient that alternative techniques. And since the LED-backlit waste less energy, generate less heat, which must be managed with air conditioning. LED-backlit display offers a long life of more than 50,000 hours (more than 25 years) use a rate of 5 hours per day.

LED backlighting systems can not show well in a typical retail environment. In general, the screens are somewhat reflective in order to achieve the high contrast ratio, and then a brightly lit showroom maynot flatter this technology. In a typical less-lit environment, this problem should not be so noticeable.

Engineering concerns

The electronics is simpler, with LED backlighting. Cold-cathode fluorescent (CCF) requires a high AC voltages (1500 VAC) at startup and operating voltages of 700 VAC or more. When the lamp is new so they can run a lot less tension, but generally increase with age, the voltage requirements, a designer complicates the problem. ALight box requires a voltage of 100 VAC @ 400 Hz.

Generate an inverter (to VAC) for both CCF and electroluminescent panels required to operate with a DC power supply. This is a significant effort, cost, size and weight of the system. The best converter for this application allows the output voltage to the lamps automatically increase as the age, prolonging the life of the lamps.

LCD with LED backlight systems use low voltage DC, usually 12or 24 VDC. This results in a smaller, simpler and more reliable system. LED backlight systems must be well chilled or their performance may suffer. The LEDs generate less heat than CCF lamps, but the heat is very concentrated. Operation at high temperatures reduces the LED lifetime and shifts its spectrum of light, while reducing output luminance.

OLED

A new technology that you will hear is about the future of organic light emitting diode (OLED). This technology has a completely differentBacklight technology, he does not need this book. For this reason, they draw much less power. And because it's no backlight, an OLED system has a larger angle than an LED system. An OLED display is much thinner than an LCD display. The response time for OLED is faster than normal LCD screens. An average of 8 to 12 millisecond response time is normal for an LCD, compared with 0.01 millisecond response time for OLED.

Sony introduced a 11 "HDTV at the ConsumerElectronics Show in Las Vegas. The new 11 "Sony TV is called the" XEL-1 ". It is very thin (1 / 10") and currently sells for $ 2500 Samsung showed a 31 "OLED HDTV with 1080p resolution at a trade show in Asia in November. LG, Toshiba, Matsushita (Panasonic), and others are investing hundreds of millions of dollars to develop this extremely promising technology. Toshiba has plans to sale of 30-inch OLED display in 2009. Samsung has announced that they sell large OLED screen in HDTV2010th

OLED displays are used for some time in digital cameras, mobile phones and other devices with relatively small panels, because they are very energy efficient, which is very important in portable devices.

In theory, OLED displays can be produced more favorable than LCD or plasma displays, which means that it should not be so expensive. Note that the first large LCD and plasma displays were much more expensive than they firstintroduced.

Abstract

LCD HD televisions and monitors with LED-array backlight are now the concept of choice because they have a better image quality, while saving and electricity. The ability to locally control light power is the key to high contrast ratio.

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Direct TV and HD - What's The Story?

So, you want to get into the HD scene and do not know where to start? First, you must make sure that you have a "HD-ready TV set with a service so that you are really awesome to be able to see beautiful views and sounds that HDTV will deliver you to go out. You will most likely check your TV's manual to find out if it 720p, 1080i or 1080p, 720p and 1080i resolutions supported are the same, but most TV manufacturers are using to try to 1080i, you fool, so watchsure used.

Now you must decide to decide which TV service you want, Direct TV, Dish TV or cable. With cable, you will be depending on which cable provider to get with satellite TV, up to 73 HD channels with Direct TV for about 55 HD channels, you will be 92 of your favorite HD programs are received, whereas with Cable and Dish TV, almost half of the HD channels will be given you, you probably never heard, and if youare those that you need and you feel for the whole HD experience.

For example, you have heard of Treasure HD, or HD-equator? No, nobody, and nobody sees the channels do not, that is, in fact, many people pay extra for tons of channels they have never heard and never seen. With Direct TV you will always have all the HD movies, the one with channels like Universal HD, Sony will, Warner Brothers, and the traditional film in HD channels, such asHBO and Starz. Direct TV also offers local high-def channels, as opposed to the cable companies want to tell you something about their advertising and DirecTV adds more HD channels all the time, so there is tiring little worried about this Film stations. Direct TV offers the number of local HD channels as cable does not, like ABC, NBC, CBS and Fox. Of course, such as cable, depends on the availability of the region.

As with cable, you must also get a separate HD receiver for yourHDTV channels with Direct TV. The basic HD receiver for Direct TV will give you 1080i (720p) picture, while the Plus version gives you full 1080p picture, really worth to your new flat-screen before. You only pay one fee, although for most Direct TV boxes, while those with cable, you have to pay so much per month.

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Panasonic Viera TCP50S1 50" Plasma HDTV

The Panasonic Viera TCP50S1 50" Plasma HDTV lets you enjoy Full-Time 1080p TV Lines Moving Picture resolution. The Panasonic Viera TCP50S1 50" Plasma HDTV produces crisp images by maintaining full TV lines of resolution even in fast moving scenes. At 100000 hour panel life watching a movie, playing a game with a console or just watching your favorite TV program, the Panasonic Viera TCP50S1 50" Plasma HDTV will bring you the best moving picture resolution.



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Samsung LCD HDTV - Best TV in America?

THE REASONS FOR SAMSUNG IS THE BEST

Touch of Color
Beautiful by light, glass and fantasy-inspired design

Imaging a television set, which evokes true feelings, even when nothing is playing on the display. Samsung Toc (Touch of Color) design gives the glossy piano black bezel frame a touch of color for an HDTV, it really original in its beauty.

ONE OF A KIND viewing experience
Samsung has a rich history of HDTV designInnovation: From beautifully shaped silhouette, the signature piano black finish. Now we make use of an original, artistic perspective, flat screen HDTV design, inspired by the art of glass blowing ...

Automotion Plus120Hz
LCD action has never been so smooth

By calculating where objects would be moving between the original frame, we are able to create and add new pictures come to film in order to speed and virtually eliminate TVMotion blur.

REFRESH the movies on TV
Samsung's new LCD HDTV with 120 Hz refresh rate can now be represented in the position frames at 120 frames per second. Since 120 is a multiple of 24 and 30, movies at 24 frames per second can be played back is as smooth as they were filmed, so all the benefits of new technologies such as Blu-ray Disc.

Super Slim LCD
Presented Samsung thinnest LCD HDTV ever

What's the skinny on the new LCD from SamsungHDTV?
There is plenty to see less, due to flat cabinets and enclosures thinner than previous models. Because it's all about the image they have Samsung's latest HD-innovation, and eliminate the uncertainty to improve the contrast for great details.

Thin and PRETTY
Full HD; slimmer TV. A mere 1.9 cm deep, Samsung is thinnest LCD HDTV up to 60 percent thinner than conventional flat TV screens. It is even slimmer than the remote control. Put them on the shelf or mountalmost flush against the wall ...

Infolink RSS Access
News, weather, stock quotes, and more directly to your HDTV

Samsung InfoLink RSS access makes it easy to stay on top of the news, even during your favorite programs. Get personalized, real-time weather, news, stock quotes and more delivered to your HDTV monitor from USA TODAY.

YOUR LIFE ON DEMAND
USA TODAY will push content to your TV via an RSS --(Really Simple Syndication). No PC required, just an Ethernet cable and an Internet connection. A wireless connection is even possible, on 7 Samsung series and above flat-screen TVs. The service is at no additional cost to all owners of a Samsung HDTV with InfoLink feature.

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Toshiba 32 HDTV LCD Monitor Review

Toshiba has quickly become an industry leader in HDTV monitors and televisions, and while they make a wide range of CRT, plasma and LCD monitors that can be used in the dwelling, is one of the most popular models, a Toshiba 32 HDTV LCD monitor.

The Toshiba REGZA 32HL66 32 "LCD HDTV is a popular and respected model. It is currently installed at retail for just under $ 1000 on most web sites. This set comes with speakers on the underside of the crowd and three separateTuner for maximum exposure. It is a light set to only 46 pounds. This is a major advantage of plasma and LCD is over CRT is that they weigh almost always much, much less. It also comes with an 8-millisecond response time, that the quality of the image makes almost perfect. If you expose yourself to have an LCD HDTV, which is to buy it.

If you opt for the same quality TV, but with a built-in DVD player, you're lucky. The Toshiba REGZA 32HLV66 32 "LCDHDTV with DVD player is available as well. It is the same high profile on TV, but it also comes with a built in high-end DVD player.

If you opt for a bigger picture, but you still want the reliability of the LCD stick, you can choose the Toshiba 47LZ196 47 "Cinema Series Pro ® high-definition 1080p LCD TV. This monitor is one of the largest LCD screens you can buy. In 47, she is sure to meet the size requirements of a hardcore TVJunkie. The MSRP for this one is a bit pricy at $ 3900, but it's worth it for HDTV fans who expect the best. For a TV of this size and quality are the shipping costs would weigh only 109 pounds, or a fraction of what it weighs the same TV, if not a flat screen model.

Toshiba is an industry leader in HDTV, and since the beginning. If you are the best TV's money can buy, Toshiba is a trusted brand.

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The New Dell Mini-Inspiron - Hide and Seek

At the recent Computex 2008 in Taiwan, Dell seemed to be a game of hide and seek.

Discovered before Computex Michael Dell with a sub-notebook, which was light in color, and wore the Dell logo. It seems that it was holding a significant sales ploy to Dell customers on purchase of the new ASUS EEE 901 before they were ready to let the Dell Inspiron Mini synchronized.

What we know about the Mini Inspiron? Very little apart from a few photos. Dell has refused toRelease any specifications for the new machine.

One thing that stands out, for most commentators, the possibility that Dell, the buttons on the pointing device side down has declined by-side to save space. You have chosen a more radical approach and took the function key buttons at the top of the keyboard. The function keys are obviously on computer terminals and PCs for at least the last 25 years.

If you look at the pictures, it is quite clear that they do notlonger exist on the Dell Inspiron Mini. For the majority of PC buyers, home buyers do not, it does not look after, from becoming a problem. The question will be whether Dell Computer shoppers can persuade companies to buy these machines in large quantities. It will depend on how much these buyers use the function keys as shortcuts for their daily work. It is a bold move, and as with all bold moves, there is a danger that even backfire.

We know that the buttons are so big on the new Dell as they can make itso that for the 9-inch screen. We know that the machine will have bright colors on the outside, and they are instantly recognizable.

It is believed that the machinery of the new Intel ®-processor is AtomTM feature. It is assumed that the price will be for this machine on a par with the ASUS, HP, and other new sub-notebook PC offerings on the market. All we can do is wait and see what Dell has on offer for us, later in the summer. We can debate and discuss, but decides to Dell,make the specifications and equipment available, we can not do anything. It is interesting that there were no leaks to the specification of each. Who wants a Dell Inspiron Mini, you must wait.

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(4) Michael Jackson 30th Anniversary Specail (Rock My World) HD

In late November 2001, the CBS television network aired a two-hour special in honor of Michael Jackson's thirtieth year as a solo entertainer (his first solo single, "Got to Be There", was recorded in 1971). The show was edited from footage of two separate concerts Michael had orchestrated in New York City's Madison Square Garden on September 7 and September 10 of 2001. The shows sold out in five hours. Ticket prices were pop's most expensive ever; the best seats cost $5000 and included a ...



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