FAQs (Frequently Asked Questions)

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 and attached, respectively. The TFT drain of each cell is connected to the electrode. The molecular arrangement of liquid crystal elements differs 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 light is not turned through 90 degrees. In this case, light that comes through the top polarized panel may not go through the polarized panel at the bottom.

: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 in 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:Why is vertical frequency of 60Hz optimal for an LCD monitor?

A:Unlike a CDT monitor, the TFT LCD panel has a fixed resolution. For example, an XGA monitor has 1024x3 (R, G, B) x 768 pixels and a higher resolution may not be available without additional software processing. The panel is designed to optimize the display for a 65MHz dot clock, one of the standards for XGA displays. Since the vertical/horizontal frequency for this dot clock is 60Hz/48kHz, the optimum frequency for this monitor is 60Hz.

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 CDT. 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 viewing angle by varying the refraction ratio. IPS (In Plane Switching) or MVA (Multi Vertical Aligned) is also used to give a wider viewing angle.

Q:Why is there no flicker on an LCD Monitor?

file:///D/J/english/200p4/safety/saf_faq.htm (6 of 7) [8/28/03 4:32:10 PM]

Page 36 Page 38
Page 37
Image 37
Philips 200P4 user manual FAQs Frequently Asked Questions
Page 36 Page 38

200P4 specifications

The Philips 200P4 is a remarkable monitor that has captured the attention of professionals and graphics enthusiasts alike. Known for its advanced features and exceptional image quality, the 200P4 is designed to cater to a variety of user needs, combining cutting-edge technology with impressive aesthetics.

One of the standout features of the Philips 200P4 is its 20-inch LCD display with a resolution of 1680x1050 pixels. This provides a wide aspect ratio and ensures sharp, clear images, whether for professional tasks such as graphic design or everyday office use. The monitor supports a 16:10 format, which is particularly advantageous for multitasking, allowing users to view multiple documents or applications side by side without sacrificing clarity.

The display utilizes an IPS (In-Plane Switching) panel technology, which offers superior color accuracy and wide viewing angles. Users can enjoy vibrant colors and consistent image quality from nearly any angle, making it ideal for collaborative environments where multiple people may need to view the screen simultaneously. The IPS technology also enhances the monitor’s performance in color-critical tasks, ensuring that what you see on the screen closely matches the final output.

The Philips 200P4 is equipped with several connectivity options, including VGA, DVI, and DisplayPort, providing flexibility in how it can be connected to various devices. This versatility allows users to integrate the monitor seamlessly into their existing setups, whether they are using a PC, laptop, or workstation.

Ergonomics is another strong point of the Philips 200P4. It features an adjustable stand that allows for height, tilt, and swivel adjustments, enabling users to find their most comfortable viewing position. This customizable setup not only enhances comfort during long working hours but also promotes better posture, reducing the risk of strain or injury.

Energy efficiency is a key consideration in the design of the Philips 200P4. The monitor complies with energy-saving standards, offering low power consumption without compromising performance. This focus on sustainability makes it an appealing choice for environmentally conscious users and organizations looking to reduce their carbon footprint.

In summary, the Philips 200P4 is a multifaceted monitor that excels in delivering high-quality visuals, ergonomic convenience, and connectivity flexibility. It stands out for its IPS technology, impressive resolution, and energy efficiency, making it a reliable choice for both professional and home office setups. Whether for graphic design, programming, or everyday tasks, the Philips 200P4 ensures a satisfying and productive user experience.
Top Page Image Contents