Information About ™Lcos |
| CATEGORIES ABOUT LIQUID CRYSTAL ON SILICON | |
| display technology | |
| silicon | |
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LCOS technology requires less Optical - Quality Glass than do Liquid Crystal Display and Plasma Display technologies, which makes it less Expensive to Implement in such Device s as televisions. At the 2004 (1920 X 1080), with a stated Contrast Ratio of 15,000 using a dynamic Lens . Before this LCoS has been used in standard sets 50" and above (November 2005). There are two broad categories of LCoS displays: three-panel and single-panel. In three-panel designs, there is one display chip per color, and the images are combined optically. In single-panel designs, one display chip shows the red, green, and blue components in succession. As each color is presented, a color wheel (or an RGB LED array) illuminates the display with only red, green or blue light. If the frequency of the color fields is lower than about 540 Hz, an effect called color breakup is seen, where false colors are briefly perceived when either the image or the observer's eye is in motion. While less expensive, single-panel projectors require higher-speed display elements to process all three colors during a single frame time, and the need to avoid color breakup makes further demands on the speed of the display technology. Single-panel implementations are also available using Texas Instruments DLP technology. Commercial implementations of LCoS technology include Sony's SXRD (Silicon X-tal Reflective Display) and JVC's D-ILA (Digital Direct Drive Image Light Amplifier). Another provider of third-party LCOS chips is a Novato-based firm, Spatialight. Direct-view LCoS devices such as the single-panel LED-illuminated devices made by Displaytech {Link without Title} are also used as electronic viewfinders for digital cameras. These devices are made using ferroelectric liquid crystals, which are inherently faster than other types of liquid crystals. THREE-PANEL DESIGNS In a DLP device the light is separated into three components and then combined back: Two beam splitters are needed. In LCoS device the light is additionally polarized and then analyzed; four beam splitters are needed. EXTERNAL LINKS
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