Over
the last few years in car DVD players have become ubiquitous features
in SUVs, minivans and even smaller automobiles. Advances in technology
have made them inexpensive, easy to install and small enough to be mounted
almost anywhere. Multimedia entertainment systems are replacing standard
CD players just as they replaced cassette players several years ago.
A couple decades ago Liquid Crystal Display (LCD) technology began
to take off. As it continued to advance LCD screens became smaller,
clearer and more affordable. In the meantime nanotechnologies were also
developing. Together the two industries produced small portable DVD
players, the ancestors of in car DVD players. Portable DVD players allowed
consumers to view movies virtually anywhere. Power adapters followed
shortly after which allowed DVD players to be used and charged in automobiles.
In car DVD players technology continues to improve.. Screens are most
commonly mounted in the backs of headrests, in ceilings as flip-down
models or on the dashboard. In-dash versions can also double as digital
instrument panels or navigational devices. They are often designed to
tilt and swivel in many directions so they can be viewed more easily
by drivers when necessary and turned away to reduce distractions when
being used by other passengers.
The actual DVD players are also commonly mounted in the dashboard,
under a seat or in the trunk of an automobile. Multi-disk changers are
popular in trunk versions so several DVDs can be loaded and viewed without
pulling over to change them. Multi-disk units may also allow for passengers
to view different movies on different screens where multiple LCD screens
are available. This allows for front seat passengers to check the weather
or get directions while the kids in the back watch their own program.
As residential satellite television becomes more fashionable, viewing
TV on the road is also becoming a viable option.
Picture quality for in car DVD players is ostensibly the same as in
home television screens. Picture clarity and quality is best measured
and by resolution. Resolution levels are expressed in terms of pixilation.
Pixels are basically the tiny little dots that create an image on an
LCD screen. The higher the resolution, the better the picture. Dot pitch
is another type of pixel measurement that indicates how sharp a picture
can be. The dot pitch of an LCD screen represents the distance between
the centers of two adjacent pixels. In this case, the smaller the number
(or the shorter the distance), the better the picture.
The picture quality of modern in car DVD players is truly amazing,
especially on small screens but generally speaking larger screens will
provide higher quality. The size of a screen is commonly known as the
viewable size or active display area. The viewable size of a screen
is measured diagonally, just as with standard TVs. In car LCD screens
as small as 2.5 inches are becoming commonplace while in home television
screens are growing larger every year.