Flat Monitor

From Wikipedia 3 May 2008, at 21:29. Once you’ve seen flat monitor up close, you’re going to want one : “Low profile” liquid cristal display (LCD) monitors. A liquid crystal display (LCD) is a thin, flat display device made up of any number of color or monochrome pixels arrayed in front of a light source or reflector. It is often utilized in battery-powered electronic devices because it uses very small amounts of electric power. They gobble up far less energy than the oversize cathode ray tube (CRT) monitors. Important factors to consider when evaluating an LCD monitor: • Resolution: The horizontal and vertical size expressed in pixels (e.g., 1024x768). Unlike CRT monitors, LCD monitors have a native-supported resolution for best display effect. • Dot pitch: The distance between the centers of two adjacent pixels. The smaller the dot pitch size, the less granularity is present, resulting in a sharper image. Dot pitch may be the same both vertically and horizontally, or different (less common). • Viewable size: The size of an LCD panel measured on the diagonal (more specifically known as active display area). • Response time: The minimum time necessary to change a pixel's color or brightness. Response time is also divided into rise and fall time. For LCD Monitors, this is measured in btb (black to black) or gtg (gray to gray). These different types of measurements make comparison difficult. • Refresh rate: The number of times per second in which the monitor draws the data it is being given. A refresh rate that is too low can cause flickering and will be more noticeable on larger monitors. Many high-end LCD televisions now have a 120 Hz refresh rate (current and former NTSC countries only). This allows for less distortion when movies filmed at 24 frames per second (fps) are viewed due to the elimination of telecine (3:2 pulldown). The rate of 120 was chosen as the least common multiple of 24 fps (cinema) and 30 fps (TV). • Matrix type: Active or Passive. • Viewing angle: (coll., more specifically known as viewing direction). • Color support: How many types of colors are supported (coll., more specifically known as color gamut). • Brightness: The amount of light emitted from the display (coll., more specifically known as luminance). • Contrast ratio: The ratio of the intensity of the brightest bright to the darkest dark. • Aspect ratio: The ratio of the width to the height (for example, 4:3, 16:9 or 16:10). • Input ports (e.g., DVI, VGA, LVDS, or even S-Video and HDMI). In color LCDs each individual pixel is divided into three cells, or subpixels, which are colored red, green, and blue, respectively, by additional filters (pigment filters, dye filters and metal oxide filters). Each subpixel can be controlled independently to yield thousands or millions of possible colors for each pixel. CRT monitors employ a similar 'subpixel' structures via phosphors, although the analog electron beam employed in CRTs do not hit exact 'subpixels'. Color components may be arrayed in various pixel geometries, depending on the monitor's usage. If software knows which type of geometry is being used in a given LCD, this can be used to increase the apparent resolution of the monitor through subpixel rendering. This technique is especially useful for text anti-aliasing. To reduce smudging in a moving picture when pixels do not respond quickly enough to color changes, so-called pixel overdrive may be used. 2. Review Flat monitor is a kind of monitor. LCD is a kind of flat monitor. There are many advantages and harm from flat monitor. One of advantage from LCD is not needed more energy. But it price is expensive than common monitor. It more practical for the business man and other. From the article we can know abaut factors which influence the LCD. There are many factors such as resolution, dot pitch, vieable size, respone time, refresh rate, matrix type, viewing angle, color support, brightness, contras ratio, aspect ratio and input port. We know that there are many supporting equipment for LCD, for example battery-powered electronic. That divice important to support the energy of LCD. So flat monitor is kind of monitor which very important for our development technology.