What is a Liquid Crystal Display? | Philips 190CW8 guide

FAQs (Frequently Asked Questions)

Q:What is a Liquid Crystal Display?

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: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.

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190CW8 specifications

The Philips HWC8190T and 190CW8 are two innovative products from Philips designed to enhance user experience through advanced technology and thoughtful features. The HWC8190T is a wireless noise-canceling headphone that elevates listening experiences, while the 190CW8 is a high-performance LED monitor ideal for both work and entertainment.

The Philips HWC8190T headphones employ state-of-the-art noise-cancellation technology, which ensures users can immerse themselves in their favorite music or podcasts without external distractions. This functionality is particularly valuable in noisy environments such as public transport, cafes, or office spaces. The headphones also feature Adaptive Sound Control, which automatically adjusts the ambient noise cancellation level based on the user's surroundings, providing optimal listening conditions at all times.

Comfort is paramount with the HWC8190T, as the design incorporates plush ear pads and a lightweight frame that allow for prolonged wear without discomfort. The headphones boast up to 30 hours of battery life on a single charge, complemented by quick charge capabilities that offer several hours of playback with just a short charging time. Additionally, the intuitive touch controls on the earcups facilitate seamless operation, allowing users to manage their music and take calls effortlessly.

On the other hand, the Philips 190CW8 monitor is designed to cater to a range of uses from gaming to professional applications. This 19-inch LED display features a Full HD resolution that delivers crisp visuals, making it suitable for high-definition content. The monitor also includes Philips’ Flicker-Free technology, which reduces eye strain during extended use by minimizing the flickering of the display.

The 190CW8 monitor supports a wide range of connectivity options including HDMI, DisplayPort, and USB ports, ensuring compatibility with various devices. Its ergonomic design allows for height and tilt adjustments to provide optimal viewing angles, enhancing user comfort and productivity. Additionally, the monitor incorporates low Blue Light technology, which helps to reduce harmful blue light exposure, making it easier on the eyes during long viewing sessions.

In conclusion, both the Philips HWC8190T headphones and the 190CW8 monitor showcase Philips' commitment to quality and user-centric design. With innovative features and technology, these products cater to the needs of modern users looking for exceptional audio and visual experiences.