Space Shuttle Columbia Disaster from NASA TV
NASA TV footage of the Space Shuttle Columbia's tragic ending starting with liftoff.
Glass Technology [2011] [By Mayank Patel].HD
Improve display (CRT, LCD, Plasma, DLP, and LCoS, TFT, HDTV, OLED, LED available display option in market ) performance across all display glass technologies by Corning.
What Is The Difference Between LCD And LED Televisions?
Looking for a new television can be a confusing experience. With all of the latest TV technologies, it can be difficult choosing the best TV for you. Two types of televisions that people will often compare are the LCD TV and LED TV. The following is a brief guide on the difference between an LCD and LED television to help you make your television selection.
Technically speaking, LCD TVs and LED TVs are both LCD TVs. The screen on both types of TVs is a liquid crystal display. The LCD television is a flat-panel television. With a LCD display, there are 2 layers of polarized glass which are joined together. The liquid crystals are contained in one of the layers. The liquid crystals pass or block the light to display the television image. The crystals do not produce their own light. The light comes from fluorescent lamps that are located at the back of the screen. Arranged in a grid are millions of shutters that open and close to release light and capture light that is not needed to produce images. Each shutter is paired with a colored filter which produces a sub-pixel. The sub-pixels are so tiny that when they unite they produce a single pixel. It displays as a single speck of color on the screen. Along with the assistance of fluorescent lamps, the television images that we view are created. LCD television can be quite thin and create high quality images. These TVs take up less space and they can even be hung.
LED TV's also have a flat-screen and use Liquid Crystal Display technology. However their source of light is different. LED TV uses Light Emitting Diodes LED. There are two types of LED back-lighting - Edge lighting and Full-Array lighting. The Edge lighting utilizes a series of diodes are that are arranged along the exterior edges of the screen. The light is dispersed across the screen. Full-Array lighting involves a number of rows of diodes behind the entire surface of the screen allowing for more control over dimming and brightness as the diodes can be switched on and off.
If you are not familiar with the current TV technologies, it can be difficult understanding the choice between LCD and LED televisions. Although LED TV's and LCD TV's both use Liquid Crystal Display technology, the key difference is that the LED TV uses Light Emitting Diodes while the standard LCD TV uses fluorescent lamps. When it comes to LCD TVs, Edge-lit television sets are normally lighter and thinner than a Full Array because the lighting source takes up less space. Full-array television sets are thicker and heavier, but one section of the LED panel can be dimmed while other sections stay bright which improves blacks and contrast in the television image. Edge lighting television sets are the lightest and thinnest TVs on the market.
LED TVs are more expensive than LCD televisions. Each type of television has its own advantages and disadvantages. The choice will depend on your needs and television preference.
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Putting a TV in Your Backyard – An Outdoor TV Enclosure is the Answer
With many people now using the garden and backyard as an extension of their home, spending time with the family outdoors, is a fantastic way to kick back, however some families have realized that they would spend more time outdoors providing there is a television out there, so that other members of the family could watch their favorite shows.
When deciding how and where to put the TV in the backyard, you need to consider a couple of points, such as were the television is going. Ideally you do not want to put it in direct sun light or everyone will be sat squinting at the screen.
Then once you have decide upon where it is going, you have to consider the weather, is it a hot or cool climate? As LCD and plasma televisions are designed and manufactured to work in protective areas, such as in homes and offices, not outdoors!
Now a wood TV enclosure would be fine in a warm climate, were little rain falls, however if you lived in England, you would certainly need to have a weatherproof TV enclosure. These waterproof TV enclosures are also referred to as IP65 LCD enclosures (European standard) and NEMA 4X LCD enclosures (USA standard), preferably made from steel with some sort of cooling device inside. These then protect the valuable electronics inside the HDTV case.
With the change in the seasons, who knows if this year we will get better or worse weather, all we can ask for is that mother nature is kind to us, so that we can enjoy the family, outdoors in a more relaxed and fun environment.
So if you are thinking of updating your garden this summer, you may also want to consider adding a TV, so that you can watch the 2010 World Cup, soccer tournament, for the guys out there, the bigger the screen, the better.
Guide to Hi-Def TV Specifications
Want to buy a high-def TV but just don't know how to figure out the specifications to choose the best sets? Here's a short guide to some of the most common specs you'll be faced with.
Contrast ratings - a measurement of the darkest blacks to the lightest whites - Panasonic boasts of a 18000:1 contrast rating for their best plasma. In nearly every case, you'll find that plasma TVs have better contrast ratings than any other high-def TV, but you don't necessarily need off-the-charts contrast ratings to have a television you'll enjoy. An 1800:1 makes most people happy, and in a darkened room you often can't tell much difference, though it will be obvious in a showroom.
1080p and 1080i - These numbers refer to the horizontal lines that make up your television image. Traditional televisions - and traditional TV broadcasts - have a 480i; most modern high-def TVs have 1080 or better. The p and i refer to the method the television uses to interpret these lines. An i is an interlaced picture, where every other line refreshes, usually every 1/60 of a second. A p displays all the lines at once, and refreshes either every 1/60 or 1/30 of a second. Look for sets that have a high number and the p for best pictures. Also, for best results look for Blu-ray sets that match this number for your television; some televisions designed for interlaced images cannot handle a Blu-ray set only for p.
Scaling - Refers to the ideal resolution for your television's picture. This is more important for a front-projection DLP TV than any other set, as it determines the maximum and minimum picture for good viewing.
Artifacts - Auras, ghost images, sharp edges, and other distracting things that can detract from your high-def TV's good image processing. A television reviewed as having few or no artifacts is always better than one that has some complaints.
De-judder processing - this refers to the sometimes-jerky motion when frames change too slowly. Because high-def TVs are in essence computing devices, this depends heavily on internal processor speed as well as good programming at the factory. Some experts complain that certain sets do too good a job at de-juddering, and as a result the image is unnaturally smooth in motion. Most consumers are happier with this sort of set, though, so the better your de-judder is the happier you will probably be.
Resolution - Most sets have at least 1920 x 1080 resolution, referencing the vertical x horizontal lines your set will display. High resolutions indicate better pictures, provided everything else works well.
Color-temperature presets -- With values like Cool1 and Neutral, these presets skew your television's color settings toward blues or reds. These settings are not necessarily a make-or-break thing for your high-def TV, but it's nice to be able to skew your picture without fiddling with every color setting. Most high-def TVs have many other color settings you can mess around with, but none of them are critical.
There are several other specs, with more being created every day, but these should help you choose a great high def TV for your needs.
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