The Different Types of Today's Digital Video Projectors
Digital projectors, likewise widely known as video projectors, acquire a video signal from which they create and subsequently display an image by using a sophisticated lens-system. Digital projectors are usually being used for classroom trainings, giving presentations, or as a home theater or even home-gaming system. Good examples for some more recent multi-purpose digital projectors are the optoma pk201 pico projector or the 450wi epson.
Different Styles of Video Projectors
Cathode Ray Tube (C.R.T.) projectors have three tubes featuring three different colors: blue, green, and red. The way they function is as follows: every time a ray touches the phosphor-coating of the tubes, it produces a glow that is returned; this actually is then the picture presented on the projector screen. The CRT type may be the most seasoned design, however it has the biggest screen size. It has now become less common due to the large and bulky projector - size.
L.C.D. projectors stream light originating from a metallic halide lamp to a prism which then divides it into 3 colour sections - red, blue, and green. The polarized light goes through the panels; then, singular pixs may either open up to allow lightbeams to move through, or close. The light-beams allowed to move through the pixels is what then shows the picture on to the display area. A perfect example is the 3200ex Epson digital projector.
Digital Light processing (D.L.P.) projectors show graphics by means of reflecting light using a "Digital Micromirror Device" (DMD) which is actually a semiconductor chip. The actual quality of the displayed picture hereby depends upon the number of these tiny mirrors.
Some considerations to make, before buying:
As pointed out before, there are many different digital projectors in the market. Every one of these has totally different methods for generating pictures and many different quality-levels of the actual images displayed. Prior to you buying, give some thought to the place where the unit will be put to use: will it be for watching movies, business presentations, class room presentations, etcetera...
Furthermore, think about the following points to find out which kind of projector fits your expections the best:
Mobility is among the most important factors to consider. Will the projector be used in different presentations, in classes or perhaps for off-site classes? If that is the case, it might be a plus to get a digital projector that can be quickly hooked up and set aside once the demonstration is completed.
Additional features of the digital projector like brightness should also be looked at. Particularly for a sizable audience, it will be challenging to follow the presentation in case they are unreadable or colorless. Look for projectors that have one thousand A.N.S.I. lumens if not more, which provides appropriate illumination.
Think about the actual size of the room, the distance between your audience and the display, and also the real display size. Go for a projector with a higher ANSI level if for example the room is quite big.
Typically, the contrast rate should go hand in hand with the illumination. For sharp colors and shades, consider getting ratios which are at least 1,500:1 or for excellently projected images, it really should be more like 2000:1 or maybe even more.
Needless to say, the density of pixels must be taken into consideration, as well. Sufficient numbers of pixels would be e.g. 1024x768, but when the projector is for High definition TV viewing, 1920x1080 will be significantly better.
The reproduction of colors determines just how real the picture appears to be on the display screen. So, ensure that you also verify the color depth.
Finally, also remember these points:
At all times verify if your digital projector has the matching input and output connections compatible with your specific DVD, DVI, High definition multimedia interface, as well as PC/laptop.
Be it for enjoyment, class room training courses, or for business powerpoint presentations, nowaday's digital projectors are a tremendous help for emphasizing things that we want to express to our audience.
Different Styles of Video Projectors
Cathode Ray Tube (C.R.T.) projectors have three tubes featuring three different colors: blue, green, and red. The way they function is as follows: every time a ray touches the phosphor-coating of the tubes, it produces a glow that is returned; this actually is then the picture presented on the projector screen. The CRT type may be the most seasoned design, however it has the biggest screen size. It has now become less common due to the large and bulky projector - size.
L.C.D. projectors stream light originating from a metallic halide lamp to a prism which then divides it into 3 colour sections - red, blue, and green. The polarized light goes through the panels; then, singular pixs may either open up to allow lightbeams to move through, or close. The light-beams allowed to move through the pixels is what then shows the picture on to the display area. A perfect example is the 3200ex Epson digital projector.
Digital Light processing (D.L.P.) projectors show graphics by means of reflecting light using a "Digital Micromirror Device" (DMD) which is actually a semiconductor chip. The actual quality of the displayed picture hereby depends upon the number of these tiny mirrors.
Some considerations to make, before buying:
As pointed out before, there are many different digital projectors in the market. Every one of these has totally different methods for generating pictures and many different quality-levels of the actual images displayed. Prior to you buying, give some thought to the place where the unit will be put to use: will it be for watching movies, business presentations, class room presentations, etcetera...
Furthermore, think about the following points to find out which kind of projector fits your expections the best:
Mobility is among the most important factors to consider. Will the projector be used in different presentations, in classes or perhaps for off-site classes? If that is the case, it might be a plus to get a digital projector that can be quickly hooked up and set aside once the demonstration is completed.
Additional features of the digital projector like brightness should also be looked at. Particularly for a sizable audience, it will be challenging to follow the presentation in case they are unreadable or colorless. Look for projectors that have one thousand A.N.S.I. lumens if not more, which provides appropriate illumination.
Think about the actual size of the room, the distance between your audience and the display, and also the real display size. Go for a projector with a higher ANSI level if for example the room is quite big.
Typically, the contrast rate should go hand in hand with the illumination. For sharp colors and shades, consider getting ratios which are at least 1,500:1 or for excellently projected images, it really should be more like 2000:1 or maybe even more.
Needless to say, the density of pixels must be taken into consideration, as well. Sufficient numbers of pixels would be e.g. 1024x768, but when the projector is for High definition TV viewing, 1920x1080 will be significantly better.
The reproduction of colors determines just how real the picture appears to be on the display screen. So, ensure that you also verify the color depth.
Finally, also remember these points:
At all times verify if your digital projector has the matching input and output connections compatible with your specific DVD, DVI, High definition multimedia interface, as well as PC/laptop.
Be it for enjoyment, class room training courses, or for business powerpoint presentations, nowaday's digital projectors are a tremendous help for emphasizing things that we want to express to our audience.
Source...