TAILIEUCHUNG - Monitors and Sound Systems

Most flat-panel monitors use liquid crystal display (LCD) technology. Passive matrix LCD uses a transistor for each row and column of pixels: less expensive, narrow viewing angle, submarining (animated graphics blurry) Active matrix LCD uses a transistor for each pixel on the screen: expensive, wider viewing angle, faster refresh Thin-film transistor (TFT) displays use multiple transistors for each pixel. | Monitors and Sound Systems lesson 5 This lesson includes the following sections: Monitors PC Projectors Sound Systems Monitors Categories of Monitors CRT (Cathode Ray Tube) Monitors Flat-Panel Monitors Comparing Monitors Video Controllers Monitors - Categories of Monitors Monitors are categorized by the technology they use: Cathode ray tube (CRT) monitors Flat-panel displays And by the way they display colors: Monochrome – One color on a black background Grayscale – Shades of gray on a white or off-white background Color – From 16 to 16 million unique colors Monitors - CRT Monitors In CRT monitors, electrons are fired at phosphor dots on the screen. The dots are grouped into pixels, which glow when struck by electrons. In color CRTs, each pixel contains a red, green, and blue dot. These glow at varying intensities to produce color images. Monitors - Flat-Panel Monitors Most flat-panel monitors use liquid crystal display (LCD) technology. Passive matrix LCD uses a transistor for each row and column of pixels: less expensive, narrow viewing angle, submarining (animated graphics blurry) Active matrix LCD uses a transistor for each pixel on the screen: expensive, wider viewing angle, faster refresh Thin-film transistor (TFT) displays use multiple transistors for each pixel. Flat-panel monitors take up less desk space; less radiation Monitors - Comparing Monitors When comparing monitors, consider four features: Size Resolution Refresh rate Dot pitch Comparing Monitors - Size A monitor's size is the diagonal measurement of its face, in inches. For years, 15" monitors (13"viewing area) were standard. Today, 17" monitors (15" viewing area) are common. Larger monitors are available, but can be expensive. The diagonal size (often 15”) Comparing Monitors - Resolution Resolution is the number of pixels on the screen, expressed as a matrix (such as 600x800). A 17" monitor offers resolutions from 640x480 up to 1280x1024. The Video Graphics Array (VGA) standard is 640x480. Super

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