Industrial LCD Displays and Their Use
By [http://ezinearticles.com/?expert=Don_Rev]Don Rev
LCD actually simply means liquid crystal display. An industrial LCD display monitor is usually used with an industrial computer, but it can also just be used to display video images from just about any video source that currently exist, and is the most common and diverse electronic flat screen technology in use now. The LCD technology has now almost completely replaced the older cathode ray tube technology that we all know and which was used for industrial monitors for many many years. It is interesting to highlight that LCD monitors tend to use only one third to a half of the electricity used by a cathode ray tube monitor, can take up to around 90% less space and are easier on the eyes. So in the end, no wonder why it has replaced the cathode ray tube monitor.
An industrial LCD display monitor uses very similar technology to a LCD screen anyone would buy. The LCD screens were first used on laptops only before the technology improved to be able to make LCD screens available for PCs as well.
Industrial LCD monitors also serves the exact same purpose as LCD monitors for PCs and laptops, which is simply to display the video image that is generated by the computer. However, an industrial LCD monitor differs from the technology on of the one you would have only in that it is much more ruggedly packaged. It is simply mounted in a steel or aluminum frame that allows it to be mounted in an equipment rack.
TFT LCDs which mean thin film transistor LCD, are a variant of normal LCDs and usually give an image that would be of better quality than normal LCD monitors. Those TFT LCDs are usually used in Televisions, flat panel displays or projectors
A feature that is frequently added to an industrial LCD monitor, but is unlikely to be on your desktop monitor, is a touch sensitive screen. This allows the user to interact with the computer program by simply touching the screen, and in some cases completely eliminates the need for a keyboard or even a mouse as an input device.
Industrial LCD monitors are now used everywhere without most people even knowing it. The best example would be with video arcade games. They usually use industrial LCD monitors. Industrial LCD monitors in video arcade games are perhaps the only example were you would really be in front of an industrial LCD monitor.
Don is working for a company specialized in [http://www.review-displays.co.uk/ ]industrial TFT LCD displays and [http://www.review-displays.co.uk/ ]LCD touch screens They can also do industrial computer monitors LCD.
Article Source: http://EzineArticles.com/?expert=Don_Rev http://EzineArticles.com/?Industrial-LCD-Displays-and-Their-Use&id=1318392
Tuesday, October 28, 2008
How to Buy a LCD Monitor
How to Buy a LCD Monitor
By [http://ezinearticles.com/?expert=Vaibhav_B]Vaibhav B
I had been salivating for about an year, desperately wanting a LCD monitor for my computer but the prices were crazy so I decided to wait a while. A couple of months ago while I was in Dubai I decided to buy a LCD monitor because the prices had dropped by then. I went in search of a 17’’ monitor but ended up buying a 19’’ screen. This was because, for the money I spent in Dubai for 19’’, I was getting 17’’ in India. And as we all know...size DOES matter....at least in monitors!
I did some research before I bought this monitor which I would be delighted to share.
So why did I want a LCD in the first place? The advantages are many - easier to move around/clean as they are thinner, lighter and take up much less space, less eye fatigue, more energy efficient than a CRT (less power consumption) and of course LCD screens look good.
The first thing I thought about was the price obviously. I didn’t want a very expensive model but I wasn’t going to buy a ’’no-name’’ brand either. Then came the size - I was using a 17’’ Samsung monitor so I7’’ was good for me. During my browsing, I saw how beautiful things look on a 19’’ screen and after comparing the price with India, I went in for a bigger screen. The next thing on my list was the response time. I wanted a fast response time (8-12 ms) so that when I played games, the image didn’t ’’ghost’’ (motion blur). My Benq screen has a response time of 8 ms and I have not seen any blurring at all. I was also careful of the ’’dead pixel’’ policy of the maker. You see, LCD screens are notorious for dead pixels - even one dead pixel in the middle of your screen can ruin your LCD experience. Before you buy your LCD, get the salesperson to display a full white image on screen first followed by a full black image (easily done in Microsoft Paint) so you can weed out dead pixels. Check the dead pixel policy of the company. If you do find dead pixels in the warranty period, will they replace your monitor? Do try to test your LCD monitor before buying it - make sure that the salesperson gives you the same monitor and not a new untested one.
A couple of things to remember about a LCD screen - it has a field of vision restriction which means that you have to sit directly in front of them to get a good view. The better the product, the larger will be the field of vision and there will not be a darkening of the screen from a ’’not in front’’ position. All LCD monitors have, what is known as, a ’’native resolution’’ which essentially means that they give their best performance at that resolution. For example, my 19’’ monitor has a native resolution of 1280 x 1024 (SXGA). Any other resolution looks washed out and blurry. Choose your resolution depending on the size of the screen you buy. For me the best resolutions are as follows: 15’’ - 800 x 600 or 1024 x 768; 17’’ - 1024 x 768; 19’’ - 1280 x 1024. Physically try out various resolutions before you buy the screen - maybe the salesperson won’t have a clue about the native resolution.
Game enthusiasts and DTP people will still prefer the CRT screen as they can buy bigger screens for the money they spend on LCD screens. In addition, the colours are brighter and there is no motion blur on CRT screens (provided you have a good video card). If you have space limitations or work extensively with ’’words’’ - word processing, Internet browsing etc, go in for a LCD monitor, provided of course you can afford it. Some LCD monitors come with speakers which makes them perfect for offices. But serious music lovers and game enthusiasts will hate the tinny sound.
I am very happy with my Benq FP91G screen and would recommend it without hesitation. Other companies like Acer/Samsung/Viewsonic make LCD screens which are equally good but prices differ. So sniff around a little before you splurge.
I am a Merchant Navy officer living in Mumbai. When I am not sailing the high seas, I enjoy surfing the net, playing computer games, swimming, listening to music and reading books.
Article Source: http://EzineArticles.com/?expert=Vaibhav_B http://EzineArticles.com/?How-to-Buy-a-LCD-Monitor&id=70833
By [http://ezinearticles.com/?expert=Vaibhav_B]Vaibhav B
I had been salivating for about an year, desperately wanting a LCD monitor for my computer but the prices were crazy so I decided to wait a while. A couple of months ago while I was in Dubai I decided to buy a LCD monitor because the prices had dropped by then. I went in search of a 17’’ monitor but ended up buying a 19’’ screen. This was because, for the money I spent in Dubai for 19’’, I was getting 17’’ in India. And as we all know...size DOES matter....at least in monitors!
I did some research before I bought this monitor which I would be delighted to share.
So why did I want a LCD in the first place? The advantages are many - easier to move around/clean as they are thinner, lighter and take up much less space, less eye fatigue, more energy efficient than a CRT (less power consumption) and of course LCD screens look good.
The first thing I thought about was the price obviously. I didn’t want a very expensive model but I wasn’t going to buy a ’’no-name’’ brand either. Then came the size - I was using a 17’’ Samsung monitor so I7’’ was good for me. During my browsing, I saw how beautiful things look on a 19’’ screen and after comparing the price with India, I went in for a bigger screen. The next thing on my list was the response time. I wanted a fast response time (8-12 ms) so that when I played games, the image didn’t ’’ghost’’ (motion blur). My Benq screen has a response time of 8 ms and I have not seen any blurring at all. I was also careful of the ’’dead pixel’’ policy of the maker. You see, LCD screens are notorious for dead pixels - even one dead pixel in the middle of your screen can ruin your LCD experience. Before you buy your LCD, get the salesperson to display a full white image on screen first followed by a full black image (easily done in Microsoft Paint) so you can weed out dead pixels. Check the dead pixel policy of the company. If you do find dead pixels in the warranty period, will they replace your monitor? Do try to test your LCD monitor before buying it - make sure that the salesperson gives you the same monitor and not a new untested one.
A couple of things to remember about a LCD screen - it has a field of vision restriction which means that you have to sit directly in front of them to get a good view. The better the product, the larger will be the field of vision and there will not be a darkening of the screen from a ’’not in front’’ position. All LCD monitors have, what is known as, a ’’native resolution’’ which essentially means that they give their best performance at that resolution. For example, my 19’’ monitor has a native resolution of 1280 x 1024 (SXGA). Any other resolution looks washed out and blurry. Choose your resolution depending on the size of the screen you buy. For me the best resolutions are as follows: 15’’ - 800 x 600 or 1024 x 768; 17’’ - 1024 x 768; 19’’ - 1280 x 1024. Physically try out various resolutions before you buy the screen - maybe the salesperson won’t have a clue about the native resolution.
Game enthusiasts and DTP people will still prefer the CRT screen as they can buy bigger screens for the money they spend on LCD screens. In addition, the colours are brighter and there is no motion blur on CRT screens (provided you have a good video card). If you have space limitations or work extensively with ’’words’’ - word processing, Internet browsing etc, go in for a LCD monitor, provided of course you can afford it. Some LCD monitors come with speakers which makes them perfect for offices. But serious music lovers and game enthusiasts will hate the tinny sound.
I am very happy with my Benq FP91G screen and would recommend it without hesitation. Other companies like Acer/Samsung/Viewsonic make LCD screens which are equally good but prices differ. So sniff around a little before you splurge.
I am a Merchant Navy officer living in Mumbai. When I am not sailing the high seas, I enjoy surfing the net, playing computer games, swimming, listening to music and reading books.
Article Source: http://EzineArticles.com/?expert=Vaibhav_B http://EzineArticles.com/?How-to-Buy-a-LCD-Monitor&id=70833
Saturday, October 25, 2008
Benq LCD Monitors Model FP731 Problems Is No Power
Benq LCD Monitors Model FP731 Problems Is No Power
By [http://ezinearticles.com/?expert=Jestine_Yong]Jestine Yong
The BenQ LCD Monitor model FP731 problem is no power symptom. If you have read my previous articles, you would know that I would not immediate use all my testing gear to check the whole power and inverter board instead I would use my eyes to scan all the components first before starting to use my digital multimeter to check on the fuse and other components first.
I saw about 8 filter capacitors that had bulged and leaked on top of its capacitor casing. We have the first clue and if my assumption is right, only the capacitors that caused no power symptoms. However in order to be in the safe side we have to check other components as well.
Looking at the power primary side didn’t reveal any burnt or cracked components in the board. It is not good enough just by looking at the board, we must check few of the critical components first in order to confirm that it is safe to switch on the power after the replacement of the 8 faulty capacitors. The critical components that I referred to was the fuse, power or chopper fet (mosfet), switch mode power supply primary winding and secondary diodes. If you have the experienced, you can check all of the components on board without removing it but of course the smps primary winding you have to use a flyback tester to test it.
After all the critical components tested okay, I would presume that after the replacement of the defective capacitors, I could immediately switch on the LCD Monitor without connecting a light bulb first. There is no necessary to connect the light bulb because the power side components were tested okay besides the fuse didn’t blow in the first place.
For your information, most of the capacitors used in the LCD power supply were from the 105 degree Celsius in order to last longer and stand the heat produce by the power supply itself. If you replace with an 85 Celsius capacitor, it would not last long and may come back with capacitor problems again.
The Benq FP731 LCD Monitor problems was restored to normal operation after the 8 filter capacitors was replaced. Capacitors breakdown was very common in the LCD Monitor because of it compact design where the heat have difficulty to transfer out due to the power supply board was covered by an aluminum shielding. Sometimes after few hours of operation, you could feel the extreme heat at the aluminum shielding and surrounding area. This is a good news to us as an electronic repairer because more and more LCD Monitor send in for repair because of capacitors faults only.
Jestine Yong is an electronic repairer and a writer, for more [http://www.electronicrepairguide.com/lcd-monitor-repair.html ]lcd monitor repair tips please visit his website at [http://www.electronicrepairguide.com/ ]http://www.electronicrepairguide.com
Article Source: http://EzineArticles.com/?expert=Jestine_Yong http://EzineArticles.com/?Benq-LCD-Monitors-Model-FP731-Problems-Is-No-Power&id=556291
By [http://ezinearticles.com/?expert=Jestine_Yong]Jestine Yong
The BenQ LCD Monitor model FP731 problem is no power symptom. If you have read my previous articles, you would know that I would not immediate use all my testing gear to check the whole power and inverter board instead I would use my eyes to scan all the components first before starting to use my digital multimeter to check on the fuse and other components first.
I saw about 8 filter capacitors that had bulged and leaked on top of its capacitor casing. We have the first clue and if my assumption is right, only the capacitors that caused no power symptoms. However in order to be in the safe side we have to check other components as well.
Looking at the power primary side didn’t reveal any burnt or cracked components in the board. It is not good enough just by looking at the board, we must check few of the critical components first in order to confirm that it is safe to switch on the power after the replacement of the 8 faulty capacitors. The critical components that I referred to was the fuse, power or chopper fet (mosfet), switch mode power supply primary winding and secondary diodes. If you have the experienced, you can check all of the components on board without removing it but of course the smps primary winding you have to use a flyback tester to test it.
After all the critical components tested okay, I would presume that after the replacement of the defective capacitors, I could immediately switch on the LCD Monitor without connecting a light bulb first. There is no necessary to connect the light bulb because the power side components were tested okay besides the fuse didn’t blow in the first place.
For your information, most of the capacitors used in the LCD power supply were from the 105 degree Celsius in order to last longer and stand the heat produce by the power supply itself. If you replace with an 85 Celsius capacitor, it would not last long and may come back with capacitor problems again.
The Benq FP731 LCD Monitor problems was restored to normal operation after the 8 filter capacitors was replaced. Capacitors breakdown was very common in the LCD Monitor because of it compact design where the heat have difficulty to transfer out due to the power supply board was covered by an aluminum shielding. Sometimes after few hours of operation, you could feel the extreme heat at the aluminum shielding and surrounding area. This is a good news to us as an electronic repairer because more and more LCD Monitor send in for repair because of capacitors faults only.
Jestine Yong is an electronic repairer and a writer, for more [http://www.electronicrepairguide.com/lcd-monitor-repair.html ]lcd monitor repair tips please visit his website at [http://www.electronicrepairguide.com/ ]http://www.electronicrepairguide.com
Article Source: http://EzineArticles.com/?expert=Jestine_Yong http://EzineArticles.com/?Benq-LCD-Monitors-Model-FP731-Problems-Is-No-Power&id=556291
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