Philips 190EW9, Руководство пользователя

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FAQs (Frequently Asked Questions)
A:
A Liquid Crystal Display (LCD) is an optical device that is commonly used to
display ASCII characters and images on digital items such as watches, calculators,
portable game consoles, etc. LCD is the technology used for displays in notebooks
and other small computers. Like light-emitting diode and gas-plasma technologies,
LCD allows displays to be much thinner than cathode ray tube (CRT) technology.
LCD consumes much less power than LED and gas-displays because it works on the
principle of blocking light rather than emitting it.
Q:
What differentiates passive matrix LCDs from active matrix LCDs?
A: An LCD is made with either a passive matrix or an active matrix display grid. An
active matrix has a transistor located at each pixel intersection, requiring less current
to control the luminance of a pixel. For this reason, the current in an active matrix
display can be switched on and off more frequently, improving the screen refresh time
(your mouse pointer will appear to move more smoothly across the screen, for
example). The passive matrix LCD has a grid of conductors with pixels located at
each intersection in the grid.
Q:
What are the advantages of TFT LCD compared with CRT?
A:
In a CRT monitor, a gun shoots electrons and general light by colliding polarized
electrons on fluorescent glass. Therefore, CRT monitors basically operate with an
analog RGB signal. A TFT LCD monitor is a device that displays an input image by
operating a liquid crystal panel. The TFT has a fundamentally different structure than
a CRT: Each cell has an active matrix structure and independent active elements. A
TFT LCD has two glass panels and the space between them is filled with liquid
crystal. When each cell is connected with electrodes and impressed with voltage, the
molecular structure of the liquid crystal is altered and controls the amount of inlet
lighting to display images. A TFT LCD has several advantages over a CRT, since it
can be very thin and no flickering occurs because it does not use the scanning
method.
Q:
What kind of wide-angle technology is available? How does it work?
A:
The TFT LCD panel is an element that controls/displays the inlet of a backlight
using the dual-refraction of a liquid crystal. Using the property that the projection of
inlet light refracts toward the major axis of the liquid element, it controls the direction
of inlet light and displays it. Since the refraction ratio of inlet light on liquid crystal
varies with the inlet angle of the light, the viewing angle of a TFT is much narrower
than that of a CRT. Usually, the viewing angle refers to the point where the contrast
ration is 10. Many ways to widen the viewing angle are currently being developed and
the most common approach is to use a wide viewing angle film, which widens the
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