Projector Expert White Paper Series:
Projectors 101 —Educate Yourself About Projectors
©2011 Optoma Technology, Inc.
6
How Long Will My Lamp Last?
Most projectors use high-intensity discharge (HID) lamps as a light source.
Lamp life is measured in hours (example, 4000 hours), which for most users will
translate to years of use. Over time, the brightness of the lamp will deteriorate.
When buying a projector, it is important to consider not just the cost of the unit,
but also the cost of replacement bulbs, factored over the life of the projector.
An LED light source has an estimated lifetime of more than 20,000 hours
(equivalent to using the projector four hours every day for over thirteen years).
LED is incredibly cost effective compared to lamp-based projectors. For example,
users with a lamp-based projector would have to replace the lamp in the projector
at least four times over 20,000 hours of usage—at a cost of over $800, compared
to the completely maintenance-free LED lamp.
3D or Not?
Many projectors promise to be able to deliver 3D images. However, there are a
variety of terms, each one meaning something slightly different. “3D-Ready” and
“3D-Capable” projectors, for example, will accept and display 3D signals from
a computer with 3D content and a 3D capable graphics card. These projectors,
meanwhile, must be paired with a converter box, such as Optoma’s 3D-XL box,
in order to project 3D content from Blu-ray 3D players, set top boxes and game
consoles. Finally, to be “Full 3D” compatible, the hardware must support High-
Denition Multimedia Interface (HDMI) 1.4a which will allow it to connect directly
to a broad range of 3D output sources including television set top boxes, Blu-ray
3D players, 3D gaming systems and more.
3D features are important if you are intending to invest in the equipment and
content to project in 3D. However, investing in a 3D-Ready projector, the main
component of your 3D system, gets you only part way to 3D display. You also
need a 3D-compatible video source, 3D glasses and 3D content.
Check carefully to ensure that all the elements of your 3D system are compatible.
For more information on 3D projectors, read Optoma’s white paper Clearing the 3D
Confusion: What You Need to Know, which can be found at www.optomausa.com.
How Much Brightness Do I Need?
Brightness (how much light the projector can produce) is measured in “ANSI
lumens.” The brightness level that you need will depend on three factors:
the content (movies, presentations, games, etc.); the image size (measured
diagonally in inches); and the brightness of the room (ranging from dark to full
lights). Each of these elements affects the others. For example, if you want to
project a large image to a large audience, you should choose a bright projector
and dim the lights as much as possible. If you want to project a detailed image,
you may want to minimize the brightness of the room.
Up to 300” with a High Brightness Projector
Up to 180” with a Standard Projector
50”–70” with a Flat Screen TV
Image Size Comparison
1 5
2
4
4
800 x 600
1024 x 768
1280 x 800
1920 x 1080
1920 x 1200
Frame Packing
3D Television
Frame Sequential
Side-by-Side Checkerboard
LEFT PIXELS RIGHT PIXELS
INDICATES BEST 3D VIEWING POSITION
Share a 3D Experience with Friends
A 3D projector provides a broader viewing
angle than a television, allowing more people
to enjoy an optimal viewing experience.
(18 paginas)
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