NEC NP-P451W Protocol Document

“

You can still buy an overhead projector but it

if you want a crowded auditorium to see what

“

“

determine

features with the desired

images and increases brightness at a cost that can be less than buying

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Portable Projectors Slim Down, Get Bright

Dec 20, 2013

by Art Kingdom

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Anyone old enough to have volunteered to help their teacher avoid fumbling with 16mm
film or overhead projectors likely marvels at today’s portable projectors that come
complete with an amazing amount of technology in a surprisingly small and easy-to-use
package.

What we considered portable projectors 15 years ago weighed 20 lbs.,” said Richard
McPherson, NEC senior product manager for projectors. “Now, portable can be an 8-lb.
projector or much less.”

probably makes more sense to take
advantage of the latest advances, especially
you are presenting.

You need a larger screen too because you need to spread that information out so that
everybody can see it,” said McPherson, “Today’s projectors are made to accommodate a
large screen.”

Portable projectors can fit into a shirt pocket or be large enough that it is probably better
if it is permanently installed. They can, among other things, connect to wireless networks
or project data and images from smart phones and tablets. Low-cost operation and
maintenance have become key features and important selling points.

Computers, and the need for
different resolutions as-well-as
more complicated content, have
driven much of the
advancements in features found
in today’s projectors,” said
McPherson, “The more content
the greater the need for higher
resolution.”

BRIGHTNESS AND
RESOLUTION

Casio XJ-H2650

McPherson advises that clients
base their buying decisions on a projector’s brightness, resolution and versatility. This
includes the ability to change projector lenses as necessary. Also, buyers should
how the projector will most frequently be used in order to match
price point.

Other potential features include edge-blending and stacking capabilities. Edge-blending
allows the use of multiple projectors to produce a massive image on a screen without
discernible lines between video segments. Stacking uses multiple projectors with software
that overlaps single
a single projector with higher light output.

Depending the situation, they may need three projectors one day and only need one the
next,” said McPherson

Projectors used in small, well-lit venues can use projectors with moderate brightness.
Larger rooms need even greater light output.

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“If you’re looking at a specific

different lenses to support any of

matched to the output resolution

1,280x800 pixels) and a brightness of 300 lumens. An

ratios, HDMI and VGA, as well as

professional high brightness

The P451W helps avoid unnecessary installation costs

connectivity with security protocols

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classroom or lecture hall, you
may need to place that projector
in the back of the room or in a
projection booth or maybe a rear

-projection application is best,”
said McPherson, “We have

these applications.”

The prospective projector’s
native resolution should be

Epson Powerlite 1835

of the device that will most often
be connected, such as a laptop
computer. XGA (Extended
Graphics Array, 1,024x768
pixels) should be acceptable for
PowerPoint and that will save
money. Super Extended Graphics
Array (SXGA, 1,280x1024 pixels)
is considered the best for
detailed images, although 1080p
HD video will obviously require
more pixels. Another thing to
consider is that a higher native
resolution projector can display both high- and low-resolution images, while a low native
resolution projector may be able to show higher-resolution images, but will usually have
distortion or artifacts.

CARRY THAT WEIGHT

Users should consider how often they plan to carry their portable projector to different
locations. Clearly, weight and overall size are important factors in portability, but keep in
mind that a smaller, lighter projector may cost more.

An example of a small but full-feature projector is the LED Aaxa KP-600-01. At just 1.3
lbs., it can fit into a lap-top case and has a lamp life of 15,000 hours. The KP-600-01 is
DLP and features WXGA (wide XGA,
optional battery provides more than 75 hours of power.

Hitachi CP-WX3030WN

The KP-600-01 has built-in
speakers, 4:3 and 16:9 aspect

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composite A/V connections and
microSD and USB readers. USB
plug-and-play allows instant set
up. The projector makes an
image size up to 100 inches
(diagonal) in low-light conditions.

Aaxa KP-600-01

performance is required, the NEC P451W has a brightness of 4,500 lumens and is
designed for screen sizes up to 140 inches. It weighs 4.1 lbs. and supports advanced
connectivity with remote control and monitoring over both wired and an optional wireless
network. The P451W’s lamp-life is rated at 6,000 hours.

1.7x, as well as vertical lens shift plus vertical and horizontal keystone correction. Lens
shift is the ability to move the projector image up or down, left or right while keeping the
projector stationary. Vertical and horizontal keystone correction centers the projected
image on the screen wherever the projector is located. A manual wall color correction
function rounds out the P451W’s ease-of-use features.

The P451W offers a free promotional DisplayNote presenter license to share, present, and
collaborate with multiple participants across multiple devices (

Brightness is a key feature of the Epson PowerLite 1965, which features 3 LCD primary
color chips that yield a brightness spec of 5,000 lumens. It has multiple remote control
and management functions, as well as nearly a dozen interfaces.

Interfaces for the PowerLite 1965 include WiFi network
for use with smart phones and mobile computing, and HDMI. The 1965 has vertical and

Larger in size and meant for mid­to-large meeting rooms where
semi-

with an optical zoom capability of

displaynote-nec.com

).