Keystoning And Your HD Projector
One thing you really ought to know about HD projectors is an effect called keystoning. Keystoning is a term to describe quite a technical term for an effect that you see from your HD projector in certain circumstances. I am no technical expert but I am going to give the description of keystoning a good go. Hopefully you will understand what I am actually trying to say and not get too confused.
Essentially keystoning occurs when your brand new HD projector is not positioned at right angles to the screen, or maybe the screen is not completely flat, meaning it may have some sort of kink or bend in it. As a result the picture that you see on the screen is not flat but sort of bent out of shape too. If this does occur it can be very distracting and very disappointing as you may have just purchased your HD projector and be excitedly sitting down to watch your first movie on your home cinema set up only to find the picture distorted and doubts in your mind as to the quality of your HD projector and possibly whether you have indeed made the right choice.
You probably want to know now what you can do about it. Well it is worth pointing out that just because your HD projector does have this keystoning effect does not mean that all is lost. A few years back HD projectors did not have an inbuilt facility to deal with this problem, but it was usually dealt with by moving the screen or furniture until you found a position from which the keystoning effect was either gone altogether or did not present a particular problem. Fortunately these days the average HD projector has functionality that is particularly established in order to deal with the issue of keystoning.
These days there are two methods of fixing the problem of keystoning. You can either do it manually or you can do it digitally. Manual adjustment essentially involves tweaking the lens to try to remove the effect which can work well in lots of cases but not in all cases and you really want the best possible picture from your HD projector.
The solution tends to come from digital correction. Both LCD and DLP HD projectors are digital display devices. By adding a special algorithm to the digital scaled image the HD projector can change the image to accommodate the flawed image and this essentially solves the problem.