Organic Light-Emitting Diode (OLED) displays
These are ???printed??? onto a flexible substrate. They are currently used on some
cell phones and portable music players and hold promise for large, inexpensive
display panels once manufacturing issues are refined.
Electronic paper (or electronic ink) technology displays
These use thousands of tiny cells that can be placed in a particular color state
and then stay in that state until changed. There are several different approaches
to cell construction, but all electronic paper displays are reflective and use ambient
light to illuminate the display. This results in a familiar experience for the
user and offers very low power consumption for displays that rarely change.
Electronic paper displays are used on some cell phones and e-book readers, and
may eventually be used for certain types of monitors, signs, and even billboards.
Video projectors
A video projector can also be considered a type of monitor. Projectors either use
LCD technology or thousands of tiny mirrors mounted directly on a Digital Light
Processor (DLP) chip. This is coupled with a high-power light, projection lenses, a
cooling system, and control electronics.
The control electronics in video projectors are usually more sophisticated than the
circuits found in CRT or LCD monitors:
??? Images can be flipped left to right (for rear-projection applications) or top to bottom
(for upside-down ceiling mounts).
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