The Screen comes in a wide range of specifications and technologies which
have an influence the image quality. Not limited, the main factors for determining
screen quality involves the maximum number of colors able to be shown, resolution
size, and LCD technology.
Larger maximum colors size translates into more variation in visual range.
Meanwhile the screen resolution influences the clarity and ability to display
details on the screen. While the LCD technology provides variations in vibrancy,
refresh rates, and power consumption:
OLED (Organic Light-Emitting Diode) - The benefit of OLED displays
over traditional LCDs is that OLEDs do not require a backlight to function,
making them ideal for use as external displays. Thus they draw far less
power and, when powered from a battery, can operate longer on the same charge.
The biggest technical problem for OLEDs the visual vibrancy compared to
other technologies.
STN (Super-Twisted Nematic) - STN displays use red, green and
blue filters to display color and require less power to drive. However,
STN displays typically suffer from lower image quality and slower response
time than TFT displays. The original STN displays developed in the early
90's suffered from slow response times and ghosting (where text or graphic
changes are blurred because the pixels cannot turn off and on fast enough).
Recent advances in the technology, however, have made STN a viable alternative
to active matrix displays. New STN displays offer 100ms response times (TFT
8ms), a 140 degree viewing angle and high-quality color rivaling TFT displays
- at about half the cost. STN displays are used in external displays and
some inexpensive mobile phones.
TFT (Thin-Film Transistor) - Made by depositing thin films for
the metallic contacts, semiconductor active layer, and dielectric layer.
TFT displays offer superior vibrancy and response times compared to STN
matricies. However power consumption is significantly greater as well, best
suited for internal displays where usage is infrequent.
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