Philips 150C5BS Инструкция по эксплуатации онлайн [34/88] 42176

FAQs (Frequently Asked Questions)

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: How are LCDs made?

A: LCDs are created from two glass plates separated from each other at a distance of a few

microns. The plates are filled with liquid crystal and then sealed together. The top plate is

colored with an RGB pattern to make the color filter. Polarizers are then glued to both plates.

This combination is sometimes called 'glass' or 'cell.' The LCD cell is assembled into a

'module' by adding the backlight, driver electronics and frame.

Q: What is polarization ?

A: Polarization is basically directing light to shine in one direction. Light is electromagnetic

waves. Electric and magnetic fields oscillate in a direction perpendicular to the propagation

of the light beam. The direction of these fields is called the 'polarization direction'. Normal or

non-polarized light has fields in several directions; polarized light has a field in only one

direction.

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: How does a TFT LCD Panel work?

A: On each column and row of the TFT LCD panel, a data source drive and a gate drive are

attached, respectively. The TFT drain of each cell is connected to the electrode. The

molecular arrangement of liquid crystal elements differ according to whether it is impressed

with voltage or not. It varies the direction of polarized light and the amount of light by letting

it through different arrays of liquid crystal elements. When two polarized filters are arranged

vertically on a polarized light pole, the light that passes through the upper polarized panel is

turned 90 degrees along with the spiral structure of the liquid crystal molecules and goes

through the polarized filter at the bottom. When impressed with voltage, liquid crystal

molecules are arranged vertically from the original spiral structure and the direction of the

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