LCDMonitors-CaliforniaStateUniversity,Northridge.ppt

LCD Monitors IS 311 Group Presentation Topics to be covered Beatrice - CRT LCD Monitor History Sici - LCDs Advantages Disadvantages Gil - Current LCDs Jerry - Future Trends Julio - Buyer’s Guide CRT LCD Monitor History How it all started Monitor Overview The most-used output device on a computer. Most desktop displays use a cathode ray tube (CRT). Laptops use liquid crystal display (LCD), light-emitting diode (LED), and gas plasma or other image projection technology. Monitors using LCD technologies are beginning to replace CRT. LCD History Liquid crystals were first discovered in 1888 by Austrian botanist Friedrich Reinitzer. Melt cholesterol-like substance. When cooled, the liquid turned blue before finally crystallizing. RCA made the first experimental LCD in (1968). Manufacturers have been developing creative variations and improvements since on LCDs. What is Being Used Today? The most popular display today remains CRT. It has been available for more than 70 years. CRTs: Vivid colors and detailed images and text. Cost less than LCD monitors. Continue to evolve. LCD Market Trend Market for flat screen LCDs grew rapidly during the ‘90s. Huge success of the laptop computer. It has still been slow in matching the market share of the CRT. Color LCDs hit the market in the early ‘90s. Has only now become popular enough for vendors to mass-produce. From CRT to LCD CRT Bulky, heavy, use vacuum tube technology. Using technology that was developed in the 19th century. LCD First LCD laptop monitors were very small due to manufacturing costs. Light, sleek, energy-efficient, have sharp picture. How Monitors Work Most use a cathode-ray tube as a display device. CRT: Glass tube that is narrow at one end and opens to a flat screen at the other end. Narrow end contains electron guns. Single gun for monochrome and three guns for color. Display screen is covered with tiny phosphor dots that emit light when struck by the electron gun. Monitor