Comparison of Technology LCD TV and Plasma TV

Plasma TVs use a screen that consists of several cells. In each cell there are two glass panels separated by a narrow slit. When the manufacturing process takes place, the gap is narrow neon-xenon gas is injected and sealed in the form of plasma. While the LCD TV, two layers of transparent material is attached to one another and made ​​polarized. One layer is coated with special polymers that touches each liquid crystal.

Plasma TVs in use at the time, gas was given an electric charge at certain intervals. Which has been electrically charged gas that emits a red phosphor, green, and blue. The resulting colors are called pixels or picture elements that subsequently form the image on a television screen. Process to produce different images on the LCD TV with Plasma TV. At the time of LCD TV is used, the electrical current going through each of the liquid crystal is a crystal that allows forward or block light to produce images.

Combustion of phosphorus that occurred at the Plasma TV to produce an image will result in thermal effects on the Plasma TV. Meanwhile, the crystal in the LCD TV does not have its own light, so that the LCD TV requires an external light source. However, this can reduce the effects of heat when the LCD TV is being used.

Based on the technology and the workings of these two types of televisions, LCD TVs have the advantage over Plasma TV. The absence of phosphorus makes LCD TV only requires less power than Plasma TVs. In addition, an external light source to LCD TV produces a smaller thermal effect than Plasma TVs.

There are still benefits of LCD TV to consider. The resulting increase in image sharpness LCD TV may be another reason for choosing the most appropriate type of television. LCD TV products that are lighter than Plasma TVs at the same size can determine the best type of television among all the products offered.

How do touch-screen monitors know where you're touching?

Touch-screen monitors have become more and more commonplace as their price has steadily dropped over the past decade. There are three basic systems that are used to recognize a person's touch:

• Resistive
• Capacitive
• Surface acoustic wave

The resistive system consists of a normal glass panel that is covered with a conductive and a resistive metallic layer. These two layers are held apart by spacers, and a scratch-resistant layer is placed on top of the whole setup. An electrical current runs through the two layers while the monitor is operational. When a user touches the screen, the two layers make contact in that exact spot. The change in the electrical field is noted and the coordinates of the point of contact are calculated by the computer. Once the coordinates are known, a special driver translates the touch into something that the operating system can understand, much as a computer mouse driver translates a mouse's movements into a click or a drag.
In the capacitive system, a layer that stores electrical charge is placed on the glass panel of the monitor. When a user touches the monitor with his or her finger, some of the charge is transferred to the user, so the charge on the capacitive layer decreases. This decrease is measured in circuits located at each corner of the monitor. The computer calculates, from the relative differences in charge at each corner, exactly where the touch event took place and then relays that information to the touch-screen driver software. One advantage that the capacitive system has over the resistive system is that it transmits almost 90 percent of the light from the monitor, whereas the resistive system only transmits about 75 percent. This gives the capacitive system a much clearer picture than the resistive system.
On the monitor of a surface acoustic wave system, two transducers (one receiving and one sending) are placed along the x and y axes of the monitor's glass plate. Also placed on the glass are reflectors -- they reflect an electrical signal sent from one transducer to the other. The receiving transducer is able to tell if the wave has been disturbed by a touch event at any instant, and can locate it accordingly. The wave setup has no metallic layers on the screen, allowing for 100-percent light throughput and perfect image clarity. This makes the surface acoustic wave system best for displaying detailed graphics (both other systems have significant degradation in clarity).
Another area in which the systems differ is in which stimuli will register as a touch event. A resistive system registers a touch as long as the two layers make contact, which means that it doesn't matter if you touch it with your finger or a rubber ball. A capacitive system, on the other hand, must have a conductive input, usually your finger, in order to register a touch. The surface acoustic wave system works much like the resistive system, allowing a touch with almost any object -- except hard and small objects like a pen tip.
As far as price, the resistive system is the cheapest; its clarity is the lowest of the three, and its layers can be damaged by sharp objects. The surface acoustic wave setup is usually the most expensive. (Source http://computer.howstuffworks.com/question716.htm

Technology Trends in 2012

From the continuing rise of tablet devices to the daily-deals craze and the return of the Internet IPO, 2011 has been a transformative year for technology.

The pace of change has become blisteringly fast, with traditional industries -- bookstores, video-rental chains, newspapers -- crumbling more quickly than we could have imagined.

Predicting what will happen in 2012, therefore, is a shot in the dark: A year is virtually a lifetime in the digital era. And yet we can at least make a guess at what will happen in the early part of next year simply by looking at the trends that are shaping the latter half of this year.

Here's my best estimate of some of the innovation we'll see in 2012:

Pete Cashmore is the founder and CEO of Mashable.com.

1. Touch computing

New input methods will be the dominant trend of 2012. Tablet computers such as the iPad might seem like a nice alternative to desktop and laptop computers, but I believe they're more than that: They're replacements. Just as the command line (remember that?) gave way to graphical user interfaces, so the mouse will be superseded by touchscreens.

The signs are obvious: Windows 8 and Mac OS X Lion, the latest desktop operating systems, borrow heavy from their mobile counterparts. These new interfaces essentially impose a touchscreen-inspired interface over the traditional desktop environment.

Over time, this half-step will become a whole one, and mobile operating systems will dominate. The transition won't be complete by the end of 2012, but we'll be much further down the path, and using computer mice much less often.

2. Social gestures

In the social media realm, social gestures appear to be the leading trend of 2012. Launched by Facebook in September, this so-called "frictionless sharing" functionality removes the need to click a button to share media with your friends. Instead, everything you listen to, read or watch is automatically posted to your profile once you approve the relevant app.

If you've seen apps such as Spotify or Social Reader in your Facebook news feed, you're already aware of these features.

The trend makes sense for social networks: With 800 million people already on Facebook, its growth is bound to slow. But if sharing becomes automatic, the volume of content on Facebook will grow at an accelerated pace. There's a big problem, however: Users may be "creeped out" by all this automated sharing of their Web activity and grow suspicious of the apps using it.

3. NFC and mobile payments

Google Wallet, Google's mobile-payment system, may become more widespread in 2012.

Next year is likely to be the year when mobile payments blossom. While we've seen a great deal of innovation in mobile payments technology this year -- including the success of Square's iPhone dongle, allowing anyone to accept credit card payments -- 2012 is the year of NFC.

What's that, you ask? Near Field Communication essentially lets you replace your credit cards with your phone: Wave an NFC-enabled phone near the credit card reader in a store (or taxi cab), and the money is deducted from your account.

By 2013, 1 in 5 cellphones are expected to be NFC-equipped. Early contenders include Google Wallet, Visa Wallet, Serve (by American Express) and ISIS.

4. Beyond the iPad

If touch computing is the future, then the iPad is surely king. And yet the iPad came up against serious competition in the latter part of 2011: As I wrote previously, I expect the new Amazon Kindle Fire to outsell the iPad in 2012. Why? Simply put, the iPad costs $499 while the Fire costs $199.

Amazon's advantages don't stop at the price point, however: The company owns an entire content store of movies, e-books, TV shows and other media. With tablet devices, the hardware is somewhat important but the content available for the device is absolutely critical: With plenty of media available for the Fire right away, it's an appealing proposition.

Why does one device constitute an entire trend? Well, as a true competitor to the iPad emerges, content producers, distributors and even app developers may have an entirely new platform on which to push their wares. (And yes, the Kindle Fire does indeed run Google's Android operating system, but Amazon's version is so unlike other Android tablets that neither users nor app developers will perceive it as "yet another Android device" -- it's a whole new platform.)

5. TV Everywhere

So you thought you'd be able to watch all your favorite shows online and get rid of your cable subscription for good? Not so fast!

The cable companies have a cunning plan: They'll let you watch live TV, plus on-demand movies and TV shows, on your connected devices if you keep your cable subscription. Dish Network, Time Warner and Comcast are among those offering the service.

TV Everywhere has been buzzed about since 2010, of course, and could be a dud -- but the rise of tablet devices would seem to create increased demand for a "TV in your hands."

6. Voice control

Here's another trend that's got a moderate chance of taking off in 2012: Voice control.

Siri, the voice-control feature in the iPhone 4S, may spread to other devices.

The novelty of Siri on the iPhone 4S -- which allows you to send texts, create reminders, search the Web and much more using just your voice -- may be the start of a new trend in voice controlled devices.

Surely voice control has been around for years? Yes, but it wasn't very accurate.

Siri and its ilk define a new era in which we talk, and our devices understand -- often on the first attempt. Other device makers will likely follow suit. What's more, Apple may use voice control to replace the TV remote.

7. Spatial gestures

Other input methods are gaining traction too: Microsoft's Kinect, for instance, has given rise to interfaces that use spatial gestures. Just like in "Minority Report," your devices can be controlled simply by waving your hands in the air.

Thanks to the many innovators who have hacked Kinect to work with other platforms, we may see more devices using this input method next year.

8. Second-screen experiences

"Second-screen experiences" is a buzz-phase among TV and movie execs these days. It refers to apps (mainly on the iPad) that listen to the audio output of your TV and display content related to the show or movie you're watching. The chances are that you already use your tablet computer or phone while watching TV, so there's ample opportunity to make the viewing experience a more interactive one.

Disney already has second-screen apps for movies such as "The Lion King" and "Bambi," while multiple TV networks have similar offerings: We can expect many, many more to be released in 2012.

9. Flexible screens

Personally, I just can't wait for flexible screens: These awesome new bendable interfaces will let you zoom in, zoom out and scroll around a page simply by twisting your phone or tablet.

Nokia and Samsung have both hinted they may release phones with bendable displays in 2012. The really exciting stuff, however -- like paper-thin devices that roll up to fit in your pocket -- is still years away.

10. HTML5

Can I squeeze in one more trend? It's HTML5 -- the fifth iteration of the HTML standard -- and it lets developers create richer, more interactive applications than ever.

Why does this matter? As developers tire of building applications for every operating system out there -- from Android to iOS to Windows Phone and beyond -- HTML5 offers the opportunity to build an app once and have it work everywhere.

The rise of HTML5 is bound to be accelerated by a recent revelation: Adobe is killing off Flash for mobile devices, meaning one of the primary methods of serving videos and rich applications on mobile phones is about to disappear. HTML5 will fill that gap. For us as consumers, that means richer applications and experiences on all our devices.

In short, 2012 is all about new ways to interact with our devices through touch and voice control, new lightweight ways to share content, a revolution in mobile payments and a plethora of rich Web applications -- not to mention the hundreds of new innovations that we've yet to dream up. I can't wait. (Taken From CNN)