FAQs (Frequently Asked Questions)

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 and attached

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

Q:What are the advantages of TFT LCD compared to 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 analog RGB signal. A TFT LCD monitor is a device displaying an input image by operating 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, molecular structure of liquid crystal is altered and controls amount of inlet lighting to display images. A TFT LCD has several advantages over a CRT, since it can be very thin and it does not have flickering because it does not use scanning method.

Q:Vertical frequency of 60Hz optimal for an LCD monitor, why?

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 higher resolution may not be available without additional software processing. The panel is designed to optimize display for 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.

file:///D/03771/english/150s3fh/safety/saf_faq.htm (6 of 8) [9/13/2002 1:44:15 PM]

Page 29 Page 31
Page 30
Image 30
Philips 150S3F user manual FAQs Frequently Asked Questions
Page 29 Page 31

150S3F specifications

The Philips 150S3F is a high-performance monitor designed to deliver exceptional visual quality and ergonomic functionality, making it a popular choice for both professional and personal use. With a 15-inch screen size, it strikes a balance between portability and usability, fitting seamlessly into various workspaces.

One of the key features of the Philips 150S3F is its advanced display technology. The monitor utilizes an LCD screen with a resolution of 1024 x 768 pixels, ensuring clear and sharp images and making it suitable for tasks ranging from office applications to graphic design. The 75 Hz refresh rate enhances smoothness, particularly when displaying video content, reducing flicker and improving the overall viewing experience.

A standout characteristic of the Philips 150S3F is its energy efficiency. The monitor is designed with eco-friendly technologies that reduce power consumption, contributing to lower energy bills and a smaller carbon footprint. This makes it an ideal option for environmentally conscious consumers as well as businesses aiming for sustainable practices.

The ergonomic design of the Philips 150S3F includes height-adjustable features that allow users to customize the monitor's position for optimal viewing comfort. This is particularly important for professionals who spend long hours in front of the screen, as it helps reduce eye strain and promote better posture.

Connectivity is another highlight of the Philips 150S3F. The monitor includes a variety of input options, such as VGA, to accommodate different devices and ensure compatibility with older systems. This versatility makes it a practical choice for users with diverse technology needs.

In terms of aesthetics, the Philips 150S3F sports a sleek, modern design that complements any workspace. Its slim profile and minimalistic look enhance its appeal for modern users, while the durable construction ensures longevity.

Overall, the Philips 150S3F combines advanced display technology, energy efficiency, ergonomic features, and versatile connectivity to meet the demands of a range of users. Whether for business or personal use, this monitor remains a reliable and stylish option for achieving high-quality visual performance.
Top Page Image Contents