GPS or Global Positioning Systems is a term that most commonly conjures up images of vehicle navigation systems, space-age satellite technology, and interactive maps for outdoors-types and sportsmen. But the reality is that there are far more applications of Global Positioning Systems beyond GPS vehicle tracking or map navigation that everyday people like us can benefit from. All it takes is a bit of creativity, and some trial and error. Here are a few of the many possibilities that can benefit you right now in your busy and hectic life.
1. Know where your children are using services from companies like uLocate Communications.
2. Keep track of elderly members of your family, so that they don't wander off alone.
3. Plan a road trip around interesting points of interests, landmarks, campsites, diners, etc, and hear fewer "Are we there yets?"- and of course get the most out of that expensive gas.
4. Get emergency road side assistance at a touch of a button from your vehicle, so you can get help exactly where and when you need it.
5. Keep a visual journal and bookmark collection of your favorite hot spots, sceneries, and points of interests, that may not be listed in any travel guide (You can create your own mini travel guides and memories).
6. Find lost pets easily using collars with built-in GPS, better than running around in your pajamas hollering like a maniac.
7. Feel safer with cellular phone 911 calls, so emergency personnel can pinpoint your location once you make an emergency call. Please double check your carrier service to see that it has GPS features and get a primer on how it works if possible.
8. Get to your interview, or any important time sensitive destination or engagement, faster by finding shortcuts and correct directions.
9. Find a good Italian restaurant near your movie theatre on the fly.
10. Track your luggage, laptops, and anything of importance while traveling.
11. Track and find family, friends in a crowded concert, graduation, or any social gathering.
12. When going on a vacation, feel free to separate from group for a while to venture on your own based on your own interests and find them later on with your GPS enabled device- even in an unfamiliar place.
Our ability to use GPS so far is limited by the relatively poor connection to the satellite feeds when we are indoors in buildings, homes, or behind anything that could obstruct the GPS connection. However with the investment and development in a new satellite network called Galileo which should be completed in the near future, these problems should be eliminated drastically. Despite these problems, GPS still offers a world of benefits as mentioned earlier, and with any technology, it will only get better.
In addition to more practical usage applications, GPS will make a great educational and fun gift for your loved one's and friends as well. Consider just two of the many creative and educational uses of GPS:
1. Stay physically active and fit by playing RayGun! A locational based cell phone game based on GPS technology.
2. Become more cultured, make global friends, and learn about the world playing GeoCache, a global GPS based treasure hunt.
With many affordable feature-rich models to satisfy anyone's preferences and budgets, now is as good a time as any to learn more about GPS technologies, which are surely to become more assimilated into the mainstream within the decade. One day we will take these things for granted just like we do now for the internet and cell phones. The key is to dive in, without paralyzing yourself with the overwhelming array of choices in the GPS market, and enjoying some truly amazing technology.
Become an instant expert on Global Positioning Systems whether it be on non-intrusive GPS tracking services for people, a GPS freight tracking system, or laptop or car tracking device.And more.
วันพฤหัสบดีที่ 28 สิงหาคม พ.ศ. 2551
How Security Camera Systems Work
Security camera systems work via closed-circuit television (CCTV). This CCTV differs from broadcast television because all of the components of the cameras and televisions are linked with cables or alternate direct means. CCTV can be viewed in real-time, and there is no need to broadcast a signal.
CCTV can be found in many places, including airports, casinos, banks, and the streets. Cameras can be placed in inconspicuous or obvious places. There is usually a security room that has individual televisions that are directly connected to a specific security camera. The amount of security personnel needed to monitor the cameras varies with respect to the amount of cameras needed. In casinos, there can be hundreds of cameras.
CCTV has been used extensively in the United Kingdom. Authorities place cameras in car parks and on the streets. These camera placements have significantly reduced car crimes. Authorities in the United Kingdom have been pushing for the introduction of even more cameras. CCTV is very good for crime detection and prosecution.
One draw back of security cameras is that many claim that they are an invasion of privacy. Another argument is that CCTV displaces crime instead of reducing it. CCTV has been accused of being an invasion of civil liberties.
The history of CCTV dates back to when the cameras used in public places were very simple and low quality. Today's cameras have high definition digital rendering and can even track object movement. When cameras are positioned correctly and synched, they can trace an objects movement over a long period of time. Cameras can also have the potential ability to have facial recognition. Currently, high-definition cameras are unable to distinguish faces completely which leads to a plethora of false positives. Critics of facial recognition technology site the potentiality for mass surveillance and the further loss of civil liberties.
Current CCTV technology being developed in the UK and the US aims at creating a computerized monitoring system that would allow security guards and CCTV operators to not have to look at all of the screens. This would allow an operator to run many more CCTV cameras, which could reduce security costs. This type of system does not look at people directly, but rather recognizes certain types of questionable behavior. A drawback of this could be that computers cannot distinguish between normal behavior, such as waiting for someone on a busy street, and suspicious behavior, such as loitering around a car.
Security cameras are very effective for crime conviction and identification, but not as effective for crime prevention. The idea is that security cameras help prevent crime because people are less willing to commit infractions if a camera is in plain sight. The down side to this is that some security cameras are hidden, so criminals have no deterrent. Security camera technology is constantly becoming more advanced, and so security cameras should be able to find criminals, and hopefully prevent more crimes in the future.
Derek Hanksworth is interested in security systems and related topics.
CCTV can be found in many places, including airports, casinos, banks, and the streets. Cameras can be placed in inconspicuous or obvious places. There is usually a security room that has individual televisions that are directly connected to a specific security camera. The amount of security personnel needed to monitor the cameras varies with respect to the amount of cameras needed. In casinos, there can be hundreds of cameras.
CCTV has been used extensively in the United Kingdom. Authorities place cameras in car parks and on the streets. These camera placements have significantly reduced car crimes. Authorities in the United Kingdom have been pushing for the introduction of even more cameras. CCTV is very good for crime detection and prosecution.
One draw back of security cameras is that many claim that they are an invasion of privacy. Another argument is that CCTV displaces crime instead of reducing it. CCTV has been accused of being an invasion of civil liberties.
The history of CCTV dates back to when the cameras used in public places were very simple and low quality. Today's cameras have high definition digital rendering and can even track object movement. When cameras are positioned correctly and synched, they can trace an objects movement over a long period of time. Cameras can also have the potential ability to have facial recognition. Currently, high-definition cameras are unable to distinguish faces completely which leads to a plethora of false positives. Critics of facial recognition technology site the potentiality for mass surveillance and the further loss of civil liberties.
Current CCTV technology being developed in the UK and the US aims at creating a computerized monitoring system that would allow security guards and CCTV operators to not have to look at all of the screens. This would allow an operator to run many more CCTV cameras, which could reduce security costs. This type of system does not look at people directly, but rather recognizes certain types of questionable behavior. A drawback of this could be that computers cannot distinguish between normal behavior, such as waiting for someone on a busy street, and suspicious behavior, such as loitering around a car.
Security cameras are very effective for crime conviction and identification, but not as effective for crime prevention. The idea is that security cameras help prevent crime because people are less willing to commit infractions if a camera is in plain sight. The down side to this is that some security cameras are hidden, so criminals have no deterrent. Security camera technology is constantly becoming more advanced, and so security cameras should be able to find criminals, and hopefully prevent more crimes in the future.
Derek Hanksworth is interested in security systems and related topics.
Digital SLR Camera versus a Compact Digital Camera
Digital Single Lens Reflex (SLR) cameras are excellent cameras that produce clearer, sharper and more colourful images than most point and shoot digital cameras available. With prices falling rapidly, they are now more affordable then ever. With the price gap between an entry model digital SLR camera and the most expensive compact digital camera narrowing; the question is� do I spend the extra money and get a Digital SLR camera? or save a few hundred dollars and purchase the best digital compact camera.
Well, it really depends on your budget; however if you do spend the extra money, here's what you get:
In addition to the price falls in the Digital SLR models, the performance on these cameras has increased year on year with the latest Digital SLR cameras being quicker and faster than ever before. They have improved to such an extent that power up or start-up time is near instantaneous with virtually no lag time. "Lag time is the time between you pressing the shutter release button and the camera actually taking the shot". This delay can vary quite a bit between different camera models and it is one of the biggest drawbacks compared to a compact digital camera. The latest digital SLR cameras have virtually no lag times and react in the same way as conventional film cameras, even in burst mode. Compact digital cameras are catching up; however the difference is still significant. A lag time of ~0.5 seconds can result in you missing the heartbeat of the moment and hence that potential great picture.
Digital SLR camera also has a larger sensor versus a smaller sensor in a compact digital camera. This equates to higher sensitivity and less noise and results in the camera taking clearer pictures in low light. (They also have better autofocus speed in low light as well). A measure of sensitivity in a digital camera is ISO and a typical ISO range for a Digital SLR camera varies from ISO 100 � 1600 with the latter being more sensitive. The ISO range for a compact digital camera varies from ISO 50 � 400. In summary, the higher the ISO rating, the greater the sensitivity and the better the photo can be taken in low light.
The Digital SLR cameras have a much longer battery life due to the limited use of the LCD screen. Please note, that as the LCD screen is only used for viewing the image, the battery life of a digital SLR can allow up to 2000 shots per charge in some cameras compared to 500 for a good point and shoot digital camera.
Digital SLR cameras also allow you to interchange lens such as adding a zoom or macro lens when required.
On the negative side of a Digital SLR camera; They are usually larger and heavier than compact digital cameras, the image cannot be previewed on the LCD screen prior taking the picture. If you really require the image to be viewed on the LCD prior to taking the picture, there are third party manufacturers that produce LCD screens that attaches to the viewfinder and allow the scene to be view just like a compact digital camera. The other drawback is the inability to take videos and finally, lenses are expensive with the majority costing more than the camera itself.
Although compact digital cameras cannot compete on features with a Digital SLR camera, they are great value, have the ability to take videos and are portable. If you have decided to purchase a Digital SLR camera I recommend you find further information using this great niche website http://www.infodigitalcamera.com for additional information on Digital SLR camera. If you are still undecided, purchase both.
Well, it really depends on your budget; however if you do spend the extra money, here's what you get:
In addition to the price falls in the Digital SLR models, the performance on these cameras has increased year on year with the latest Digital SLR cameras being quicker and faster than ever before. They have improved to such an extent that power up or start-up time is near instantaneous with virtually no lag time. "Lag time is the time between you pressing the shutter release button and the camera actually taking the shot". This delay can vary quite a bit between different camera models and it is one of the biggest drawbacks compared to a compact digital camera. The latest digital SLR cameras have virtually no lag times and react in the same way as conventional film cameras, even in burst mode. Compact digital cameras are catching up; however the difference is still significant. A lag time of ~0.5 seconds can result in you missing the heartbeat of the moment and hence that potential great picture.
Digital SLR camera also has a larger sensor versus a smaller sensor in a compact digital camera. This equates to higher sensitivity and less noise and results in the camera taking clearer pictures in low light. (They also have better autofocus speed in low light as well). A measure of sensitivity in a digital camera is ISO and a typical ISO range for a Digital SLR camera varies from ISO 100 � 1600 with the latter being more sensitive. The ISO range for a compact digital camera varies from ISO 50 � 400. In summary, the higher the ISO rating, the greater the sensitivity and the better the photo can be taken in low light.
The Digital SLR cameras have a much longer battery life due to the limited use of the LCD screen. Please note, that as the LCD screen is only used for viewing the image, the battery life of a digital SLR can allow up to 2000 shots per charge in some cameras compared to 500 for a good point and shoot digital camera.
Digital SLR cameras also allow you to interchange lens such as adding a zoom or macro lens when required.
On the negative side of a Digital SLR camera; They are usually larger and heavier than compact digital cameras, the image cannot be previewed on the LCD screen prior taking the picture. If you really require the image to be viewed on the LCD prior to taking the picture, there are third party manufacturers that produce LCD screens that attaches to the viewfinder and allow the scene to be view just like a compact digital camera. The other drawback is the inability to take videos and finally, lenses are expensive with the majority costing more than the camera itself.
Although compact digital cameras cannot compete on features with a Digital SLR camera, they are great value, have the ability to take videos and are portable. If you have decided to purchase a Digital SLR camera I recommend you find further information using this great niche website http://www.infodigitalcamera.com for additional information on Digital SLR camera. If you are still undecided, purchase both.
Choosing A VOIP Provider
There are 2 basic VOIP (Voice Over Internet Protocol) provider options: free services or paid providers that charge a monthly fee. Making that choice depends on how you plan to use VOIP.
If you just want to chat with friends and family over the Internet, a free service may be adequate. If you're looking for a true alternative to normal phone service, however, consider a VOIP service with a paid package deal.
Package Choices
There are so many choices. To determine which is the best service for your money, you must decide which services you need, and whether you want to quit your existing telephone service completely.
Most VOIP providers offer package plans with free calls to a designated geographical area. Nearly all providers offer free call waiting, call display, and conference call services.
Even though the basic package for a similar fee is the same with most providers, there is a great rivalry between VOIP service providers, with each striving to offer services that set them apart from their competitors. To make the right choice, you'll have to check several packages to find the best for your needs.
For example, if you make a lot of overseas calls, a package that includes international calls makes sense. Or if you receive most of your calls from a specific city, get a package that offers a specific phone number that allows people to call you at that local rate.
Service and reliability are other critical factors when selecting a VOIP provider. This information is available from reviews on the internet or by asking your friends which providers they use. One suggestion is to find a provider offering a money-back guarantee.
Find out how much bandwidth is required for a particular VOIP service. If the information is not available from the company's web site, send an e-mail to verify that your broadband connection is suitable for their VOIP service. Usually 128 kbps on the upload side is sufficient.
Problems
Emergency calls are 1 of the technical drawbacks with VOIP, because it's hard to determine your physical location on VOIP calls. 911 calls may not be routed to the correct call center, and if they are, operators can't establish your location if you are unable to communicate. The Federal Communications Commission, in the United States, is demanding that VOIP service providers find a solution.
Providing phone service during a power outage is another technical problem. Since VOIP requires electrical current to operate modems, in a power outage the VOIP phone line goes dead. One solution is to use a computer with a battery backup. Another is an electrical generator to provides emergency household electricity.
Finally, you may want to retain your existing phone service after signing up for VOIP. Not all providers offer this service, so if it's important, verify that ability in advance.
Ron King is a full-time researcher, writer, and web developer. Visit voip-solutions-now to learn more about this subject.
Copyright 2005 Ron King. This article may be reprinted if the resource box is left intact.
If you just want to chat with friends and family over the Internet, a free service may be adequate. If you're looking for a true alternative to normal phone service, however, consider a VOIP service with a paid package deal.
Package Choices
There are so many choices. To determine which is the best service for your money, you must decide which services you need, and whether you want to quit your existing telephone service completely.
Most VOIP providers offer package plans with free calls to a designated geographical area. Nearly all providers offer free call waiting, call display, and conference call services.
Even though the basic package for a similar fee is the same with most providers, there is a great rivalry between VOIP service providers, with each striving to offer services that set them apart from their competitors. To make the right choice, you'll have to check several packages to find the best for your needs.
For example, if you make a lot of overseas calls, a package that includes international calls makes sense. Or if you receive most of your calls from a specific city, get a package that offers a specific phone number that allows people to call you at that local rate.
Service and reliability are other critical factors when selecting a VOIP provider. This information is available from reviews on the internet or by asking your friends which providers they use. One suggestion is to find a provider offering a money-back guarantee.
Find out how much bandwidth is required for a particular VOIP service. If the information is not available from the company's web site, send an e-mail to verify that your broadband connection is suitable for their VOIP service. Usually 128 kbps on the upload side is sufficient.
Problems
Emergency calls are 1 of the technical drawbacks with VOIP, because it's hard to determine your physical location on VOIP calls. 911 calls may not be routed to the correct call center, and if they are, operators can't establish your location if you are unable to communicate. The Federal Communications Commission, in the United States, is demanding that VOIP service providers find a solution.
Providing phone service during a power outage is another technical problem. Since VOIP requires electrical current to operate modems, in a power outage the VOIP phone line goes dead. One solution is to use a computer with a battery backup. Another is an electrical generator to provides emergency household electricity.
Finally, you may want to retain your existing phone service after signing up for VOIP. Not all providers offer this service, so if it's important, verify that ability in advance.
Ron King is a full-time researcher, writer, and web developer. Visit voip-solutions-now to learn more about this subject.
Copyright 2005 Ron King. This article may be reprinted if the resource box is left intact.
Sony is Dusting Off the Walkman
Sony is dusting off the name "Walkman" to compete with Apple's iPod. The Japanese are building on their own music experience to capitalize on the popularity of the smaller MP3 player.
In the eighties and nineties the Sony Walkmans and Discmans were a part of everyday life. But these days the MP3 player has market dominance and the Japanese company has faded. Apple and its iPod is now number one.
Just last week both companies introduced new MP3 players which will be in direct competition with each other. Sony introduced two players under the name "The New Walkman", while Apple released the iPod Nano.
Sony is using the name "Walkman" in the hope that 26 years after the first introduction of the famous cassette player that name still has competitive value. However, we must conclude that however great Sony's past accomplishments they have missed the boat in the MP3 revolution in a major way. The main cause for Sony's failure is their stubborn refusal to give up the Attrac3 music format. While the whole world was exchanging MP3 files it was only last year that Sony introduced players that can handle this format.
By that time Apple was just releasing its seventh generation of iPod-type players.
Sony now markets the NWA-1000 and NWA-3000. These music players can directly communicate with the Sony music store "Connect". It is also possible to copy files from the computer directly to the players.
Sony is well known for their activity in the music and film business. They must use their position in this field to regain market share and prestige in this interconnected industry. Interconnected because it seems that it is both Sony's and Apple's strategy to heavily interconnect music player, software and music store. Apple's iTunes was the first Internet music store offered large-scale legal downloads of MP3 files.
Sony won't give us any figures about their sales and market share. Steve Jobs (CEO of Apple) has no problem with figures. Perhaps the major reason for this is how good they are. Apple claims about half a billion downloads in a heavily growing market.
The iTunes store is heavily focused on its cooperation with the iPod. This player is definitely the market leader among the more expensive MP3 players which have their own hard disk. In the cheaper segment, MP3 players with the so called flash memory, the leaders are Creative, LG and iRiver. The iPod Shuffle with its flash memory couldn't do much about that. The negative sentiment about the shuffle was mainly due to its lack of an LCD screen and relatively high price.
With the iPod Nano Steve Jobs' Apple has a twofold challenge on its hands. Firstly there is the above-mentioned competition with Sony. Secondly, the new Apple player has a storage space of 4Gb of flash memory and no hard disk.
The iPod Nano is the successor to the iPod Mini. Apple is constantly reducing the physical size and the prize of their players. Their strategy seems to be to concentrate on iTunes as their major profit producer.
There is an interesting time ahead of us -- we will see heavy competition between Apple and Sony both in the interconnected markets of the MP3 players and their respective music stores.
Who will win? I don't know, but one thing I do know is that Apple was almost broke at the end of the last century. It has been under the leadership of Steve Jobs that Apple made an almost miraculous comeback as a major player on the global market of mini-electronics.
In the eighties and nineties the Sony Walkmans and Discmans were a part of everyday life. But these days the MP3 player has market dominance and the Japanese company has faded. Apple and its iPod is now number one.
Just last week both companies introduced new MP3 players which will be in direct competition with each other. Sony introduced two players under the name "The New Walkman", while Apple released the iPod Nano.
Sony is using the name "Walkman" in the hope that 26 years after the first introduction of the famous cassette player that name still has competitive value. However, we must conclude that however great Sony's past accomplishments they have missed the boat in the MP3 revolution in a major way. The main cause for Sony's failure is their stubborn refusal to give up the Attrac3 music format. While the whole world was exchanging MP3 files it was only last year that Sony introduced players that can handle this format.
By that time Apple was just releasing its seventh generation of iPod-type players.
Sony now markets the NWA-1000 and NWA-3000. These music players can directly communicate with the Sony music store "Connect". It is also possible to copy files from the computer directly to the players.
Sony is well known for their activity in the music and film business. They must use their position in this field to regain market share and prestige in this interconnected industry. Interconnected because it seems that it is both Sony's and Apple's strategy to heavily interconnect music player, software and music store. Apple's iTunes was the first Internet music store offered large-scale legal downloads of MP3 files.
Sony won't give us any figures about their sales and market share. Steve Jobs (CEO of Apple) has no problem with figures. Perhaps the major reason for this is how good they are. Apple claims about half a billion downloads in a heavily growing market.
The iTunes store is heavily focused on its cooperation with the iPod. This player is definitely the market leader among the more expensive MP3 players which have their own hard disk. In the cheaper segment, MP3 players with the so called flash memory, the leaders are Creative, LG and iRiver. The iPod Shuffle with its flash memory couldn't do much about that. The negative sentiment about the shuffle was mainly due to its lack of an LCD screen and relatively high price.
With the iPod Nano Steve Jobs' Apple has a twofold challenge on its hands. Firstly there is the above-mentioned competition with Sony. Secondly, the new Apple player has a storage space of 4Gb of flash memory and no hard disk.
The iPod Nano is the successor to the iPod Mini. Apple is constantly reducing the physical size and the prize of their players. Their strategy seems to be to concentrate on iTunes as their major profit producer.
There is an interesting time ahead of us -- we will see heavy competition between Apple and Sony both in the interconnected markets of the MP3 players and their respective music stores.
Who will win? I don't know, but one thing I do know is that Apple was almost broke at the end of the last century. It has been under the leadership of Steve Jobs that Apple made an almost miraculous comeback as a major player on the global market of mini-electronics.
Installing Linux on iPod Nano with Windows
Installing Linux on your iPod from Windows wasn't possible in the past. This simple guide will get Linux running on your iPod nano within minutes.
Before you can start installing Linux on your nano, you will have to make some changes to your iPod's system. In short, Apple wants iPods to only work with iTunes.
Before you even start that however, backup all the files on your Nano. This is very important.
Now, download the iPod Updater from the Apple website. Install and run the application, then click the 'Restore' button.
It should take about 5 minutes to restore your nano like it was brand new.
After it's complete unplug your iPod from your computer. It should ask you for the language type you want on your ipod. Then just plug it back in.
Download the iPod Linux pack. There is different versions, however I reccomend the 'johnnywest' version which can be found here.
Open the readme file then open the iPod Linux folder and click on the iPod Linux installation icon.
If done correctly iPod Linux will now read your iPod and give you the ability to install.
That's it, enjoy!
Before you can start installing Linux on your nano, you will have to make some changes to your iPod's system. In short, Apple wants iPods to only work with iTunes.
Before you even start that however, backup all the files on your Nano. This is very important.
Now, download the iPod Updater from the Apple website. Install and run the application, then click the 'Restore' button.
It should take about 5 minutes to restore your nano like it was brand new.
After it's complete unplug your iPod from your computer. It should ask you for the language type you want on your ipod. Then just plug it back in.
Download the iPod Linux pack. There is different versions, however I reccomend the 'johnnywest' version which can be found here.
Open the readme file then open the iPod Linux folder and click on the iPod Linux installation icon.
If done correctly iPod Linux will now read your iPod and give you the ability to install.
That's it, enjoy!
What's the Difference Between Plasma TVs and LCD TVs
Plasma and LCD TVs are the latest trend in home entertainment. Both offer unrivalled picture quality and resolution, while doing away with the bulkiness of the older rear-projection technologies. But with all of the hype surrounding these two types of televisions, what is the difference between them? Although they look- and are virtually priced- the same, they are not.
There differences are found in the way in which they display their pictures. Plasma TV technology is made up of hundreds of thousands of little pixels, each capable of displaying red, green, and blue colors. A plasma monitor often consists of two panels, which are filled with an inert gas, such as xenon or neon. When the pixels are excited by pulses of electricity, the gas becomes liquid, thus generating light. This light in turn then illuminates the pixels, causing them to display the appropriate color to form a picture.
LCD panels function in a very similar manner. A panel of thin-film-transmitters, or TFT, sends electricity to cells filled with liquid crystal. When the cells are struck by the electricity, the liquid crystals allow light to filter through. Unlike the pixels found in plasma TVs, LCD monitors create color by blocking out the appropriate wavelengths from white light.
So which is better? The answer to this question depends upon what you plan to use TV for. Do you just want to use it to watch movies and television? If so, then a plasma TV might be best, because they are capable of a higher better color saturation and contrast than their LCD counterparts and for displaying moving images. If you plan in spending a lot of time showing digital photography or plan on using the monitor with your computer, then a LCD display might be better suited to these purposes.
Both plasma and LCD technologies each have their advantages and disadvantages and your decision should ultimately be based on your monitor's application.
There differences are found in the way in which they display their pictures. Plasma TV technology is made up of hundreds of thousands of little pixels, each capable of displaying red, green, and blue colors. A plasma monitor often consists of two panels, which are filled with an inert gas, such as xenon or neon. When the pixels are excited by pulses of electricity, the gas becomes liquid, thus generating light. This light in turn then illuminates the pixels, causing them to display the appropriate color to form a picture.
LCD panels function in a very similar manner. A panel of thin-film-transmitters, or TFT, sends electricity to cells filled with liquid crystal. When the cells are struck by the electricity, the liquid crystals allow light to filter through. Unlike the pixels found in plasma TVs, LCD monitors create color by blocking out the appropriate wavelengths from white light.
So which is better? The answer to this question depends upon what you plan to use TV for. Do you just want to use it to watch movies and television? If so, then a plasma TV might be best, because they are capable of a higher better color saturation and contrast than their LCD counterparts and for displaying moving images. If you plan in spending a lot of time showing digital photography or plan on using the monitor with your computer, then a LCD display might be better suited to these purposes.
Both plasma and LCD technologies each have their advantages and disadvantages and your decision should ultimately be based on your monitor's application.
สมัครสมาชิก:
ความคิดเห็น (Atom)