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By Giuseppe Mathis

 Digital projectors are those video projectors which are used in conferences for presentations. The digital projectors receive video signals from, usually, desktop computers and display images on large screens which can be easily comprehended by all in the gathering.

Two Types of Digital Projectors

To begin with, there are two technologies used by digital projectors, the older one being the LCD, liquid crystal display with independent transparent panels of LCD for each constituent primary color (red, blue and green.) The image transmission depends on the signal received by the projector from PC which redirects the light signals through these LCD panels and lens onto a screen. The LCD projectors look pretty similar to older slide projectors and are simple in construction and thus cost less in comparison to their successors DLP projectors. The LCD can be thought of as slides placed at the focal length of the lens making it complete. Clarity of picture in LCD projectors depends on the number of pixels it is set for. (Pixels are smallest area of data or picture holders)

DLP Projectors: The Latest of the Digital Projectors

Digital Light Processing or DLP is a technology developed by Texas Instruments in 1987. DLP projectors bring in a paradigm difference in technology in image projection to board rooms. Unlike their predecessors, DLP projectors make use of tiny mirrors or micro mirrors to reflect light images to pass through the projector lens and onto a screen. Each mirror can be thought of as representing a pixel. The mirrors reflect primary colors in rapidly rotating succession as actuated by a rotating color filter wheel. The image of rapidly changing colors ‘constructs’ images for human eye perception. The micro mirrors are collectively called as DMD or ‘digital micromirror device’.

For the sake of enhancing picture clarity, the rotating wheel is provided with a plain patch which allows plain white light. This type of DMD projectors are also known as single chip projectors. The three chip projectors are a bit complicated but offer better clarity. Here a prism splits the light from lamp into primary colors which are redirected to DMD which recombines them before projecting through the lens.

Where Is the Difference

DLP projectors are lighter and give far better pictures. Single chip resolves 16.7 colors while the three chip model does a, hold your breath, 35 trillion colors.

Commercial Models

Texas Instruments is the pioneer who owns the patent for DLP technology. Fraunhofer Institute of Dresden of Germany developed the same technology simultaneously and markets it as Spatial Light Modulators. HP, Samsung are other market leaders in both LCD and DLP technologies.

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FTA Satellite Receivers: a Household Device

By Frankie Zimmerman

 In the last five to six years the FTA satellite receiver has become an everyday household electronic device. People all over the world are buying free to air receivers because of their growing and always evolving features and capabilities. FTA receivers these days are gaining popularity all over. Starting initially in Europe, the craze spread globally shortly after. With FTA satellite TV being available in almost every country across the globe, FTA satellite is the wave of the TV future.

Free to air satellite TV channels are free. You can connect your receiver up to multiple satellite dishes and point your dish at different satellites in space. There are thousands of 100% free satellites in space with limited channels per satellite. Some free to air channels include PBS, International channels, and locals. These companies broadcast their signal for free. The majority of people with FTA receivers don’t point their dishes at these satellites. Infact, people all over the world including North America are reprogramming their boxes so they can point their dishes at real satellite TV and watch channels for free. This is actually where FTA keys come into play. In order to watch FTA satellite TV this way. You need to be constantly entering what are called FTA keys or Dish keys into your receiver so that your receiver can keep itself updated with the satellites in space. This enables you to watch TV.

Because the keys are constantly changing and always need to be entered manually each time a key change occurs, this presents a problem and inconvenience to the user. This is why people program files called autoroll bins on to their receivers. Autoroll files automatically roll the keys over to the new keys everytime they change. These are what people often refer to as FTA fixes. FTA fixes fix your receiver essentially by getting your channels to work with very little human interaction other than initially programming the new FTA file to your receiver a few times a year. FTA files don’t work forever, they also go down from time to time and the user will have to load the new autoroll bins.

Usually people get their autoroll bin files from sources like FTA Support websites. FTA Support sites offer a complete support service to their members giving them all the software, files, keys, and online technical support they’ll ever need to keep themsselves always up and watching TV. FTA support sites usually include online support and troubleshooting via email and they usually have all the downloads and setup instructions you’ll ever need to get your receiver working all the time.

FTA receivers are getting bigger and better offering new innovative and experimental ideas and technologies that keep them interesting all the time. Many new features FTA receiver owners have learned to love are 7 day EPG (electronic program guides), PVR functions (record, pause, and rewind live TV), DivX movie watching capabilities, and many more little features and add-ons that keep things very interative and enjoyable.

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You May Only Need to Replace Your Screen to Fix Your Laptop

By Giuseppe Mathis

 Many people are paralyzed when their laptop computers are broken or damaged. They are willing to do almost anything or pay any price to get the offending piece or part replaced so that they can get on with their lives.

One part that is especially vulnerable on a laptop computer is the screen. An LCD screen, the type of screen that is used in most laptop computers, is very vulnerable to scratching or other damage.

Fortunately, a damaged LCD screen is not the end of your laptop. Replacement LCD screens can be very affordable and the turn around time to getting them fixed can be very quick if you know where to go and what to look for.

The first thing you will want to do when you are looking for replacement LCD screens is to not panic. Many people get too upset when their computers aren’t working and then they set themselves up to get taken advantage of.

Investing even an hour or two into finding the right price and an honest repairman could make all the difference in the quality of repair that you get.

However, that extra hour or two that you should spend shopping for replacement LCD screens usually won’t get your computer back to you any faster and may end up costing you time.

Look for local places with good reputations. Call around and ask about pricing before you show up. You may also want to call friends, family, and acquaintances for recommendations.

Actually, the ideal time to locate honest and good computer repair people is when you first get your new computer. After the warranty runs out, you will need to take care of problems yourself.

Ideally, you should do the research on where to get replacement LCD screens and other parts and repairs when you first get your computer. However, if you didn’t do that, all is not lost. You can still quickly determine where the best place to go to get replacement LCD screens with just a couple of simple tips.

There are many stores that offer great prices on the internet for replacement LCD screens. However, unless you are sending your computer back to the manufacturer for a covered repair, sending out your laptop for repairs like getting replacement LCD screens is ill-advised.

With the mail, you are only lengthening the amount of time you are without your computer. Secondly, replacement LCD screens are a common repair and don’t require sending it to some company far from where you live.

Also, you run the risk of losing or damaging your computer while it is being shipped. Lastly, what do you really know about the company where you are mailing your computer?

It could be a scam of some kind and taking action would be very difficult and expensive. Staying close to home is usually a much better and quicker policy.

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