Some Basic Information About Projector and Lamp Technology

The heart of the projector is its lamp, which is its primary component.
This lamp is accessible in most of the models behind the projector door,
for easy replacement. At times projectors come equipped with two lamps,
both of which function together, or one may take over when the other one
fails. You may have come across the term UHP when purchasing a projector.
This stands for Ultra High Pressure lamps which are commonly used in
projectors, the other lamps are metal halide, and, for larger and upper
range projectors, Xenon lamps. Xenon lamps give better color images than
metal halide, but need more energy to operate and have a lower life span.
What is being called the lamp is actually an entire lamp module comprising
of the bulb, the reflector both encased in housing with leads for power
reception.

There is an integrator which receives the light of the bulb which is thrown
on it by the reflector, through a system of lenses. It is a very efficient
system that processes the image to appear sharp and all the pixels are
uniformly illuminated without wastage of light. The reflector is designed
to process all the light optimally. This is a very sophisticated system
which a layman does not need to understand, but, I am given to understand
that many papers are written about the system by technical people dealing
with the science of optics and photography.

What a end user of the projector needs to know and understand is that the
reflector concentrates the light from the projector bulb through a series
of lenses or a single lens so that as much light as possible can be
delivered on the screen, so that we get extremely sharp and life like
images.

Bulb size and the problem with stray light rays

The manufacturers noticed problems arising from stray light rays. These,
since they were not directed directly on the screen, reduced the efficiency
of the projector by striking various other walls of the projector and also
leaking through the vents. If they escaped the projector they could strike
the screen in various places affecting the image and the color. So
innovative minds worked at this problem and found a solution, which is to
reduce the source of the light. The theory is that smaller the light
source, smaller the leakage, hence the size of the projector bulbs started getting reduced.

Innovative ways to make the small bulb create a great illumination have
been adopted. For instance metal halide lamps have a gas filled gap through
which light is created. However this has led to unwanted tungsten deposits
that darken the lamp and reduce its brightness. UHP lamps were introduced
by Philips which employs a pure mercury vapor arc under extremely high
pressure to create illumination. The arc gap is smaller than the halide gas
filled gap, and sidesteps the tungsten deposit problem. It also creates
much better light.

If we go in for high quality replacment projector bulbs the reflectors have much better quality material, the life span of the
bulb is much higher and if works to optimum efficiency for a longer period.

From AliExpress

AliExpress.com Product - AUN Smart Projector, D5S, Android 7.1 (Optional 2G+32G) WIFI, Bluetooth, HDMI, Home Theater Mini Projector (Optional D5 White)
AliExpress.com Product - VIVICINE 1280x720p HD LED Projector,Android 7.1.2 HD Portable HDMI USB PC 1080p Home Theater Proyector Bluetooth WIFI Beamer
AliExpress.com Product - New listing native 1280*800 smart game movie Video HDMI USB VGA TV Full HD 1080P Home Theater Android OS wifi 3D LED Projetor
AliExpress.com Product - 2016 New CT80 Portable Digital Mini 1800lumen LED LCD Projector HD 1080P Home Theater support USB SD VGA ATV HDMI black or white

About ProjectoReviews.com

ProjectoReviews.com reviews various projectors that include LCD, LED and DLP technologies based video projectors from various popular brands such as Epson, Optoma, BenQ, Sony, LG, CiBest, Tenker and many others. Most of the video projectors reviewed on ProjectoReviews.Com are based on users' reviews provided on Amazon.com shopping website. Also, most of these projectors have received 4+ ratings and recommendation from real users. I will request all the visitors to use search box of ProjectoReviews.com to find the desired projectors, if you are not able to find your desired projector, please contact us. I will try my best to help you find your desired projector.

View all posts by ProjectoReviews.com →

Leave a Reply

Your email address will not be published. Required fields are marked *