A great article about how to expand your laptop screen real estate!
1. Android, iPad tablets
Yes, you can use your tablet as an external monitor with your PC or Mac OS X laptop. ... Apps that transform an iPad into an external monitor for a Windows laptop include DisplayLink ....
2. Portable USB Monitors
Professionals such as auditors and consultants who may frequently
be required to work at various locations will know that a portable USB
monitor used with a laptop helps to greatly increase work efficiency.
This is made possible by technology DisplayLink
developed to compress video data and pump it over a USB link, where it
is uncompressed and decoded by a specialized chip made by the company.
By embedding a DisplayLink chip into an energy-efficient LCD
monitor and drawing power directly from the USB interface, manufacturers
have been able to come up with portable USB monitors that can fit into
the same size bag as a laptop. Moreover, the availability of faster CPUs
on laptops and the high bandwidth available in USB 2.0 and USB 3.0
means that the usage experience no different than that of a conventional
monitor for most users-and can even allow for video playback on
Models include the Field Monitor Pro, a 4-pound portable monitor that packs a larger 15.4-inch screen and folks shut like a laptop for stowing away, and the Lenovo ThinkVision LT1421 USB monitor,
which tips the scales at just 1.91 pounds (0.87kg) and draws its power
entirely from the USB port. Since older laptops may not deliver
sufficient current from a single USB port, the ThinkVision and other
models typically come equipped with a two-pronged USB cable to alleviate
this problem and make it possible to use multiple displays.
4. Dedicated DisplayLink Adapter
The DisplayLink technology mentioned earlier can also be
implemented for a laptop-based workstation, where up to six displays are
supported per system using specialized DisplayLink adapters. Since the
DisplayLink technology consumes a fraction of the processing cycles from
its host, one drawback is that it may perform poorer in underpowered
systems or when multiple large displays are used, as opposed to
solutions that uses dedicated display adapters.
High-definition displays of up to 2560x1440 are not supported by
any DisplayLink adapters currently on the market, though that should
soon change given that the latest DisplayLink DL-3000 chip platform is capable of supporting displays of up to 2560x1600. For now, vendors such as Targus
have also released high-performance docking stations built around USB
3.0 and incorporating DisplayLink technology to support up to two