NEC PX-42VR5HA HT410_510_1100_42VR5_42XR3_50XR4_61XR3 choosing the right displ - Page 4

rear glass substrate grid barrier rib phosphor display electrode front glass substrate black stripe data electrode WHAT IS A PLASMA DISPLAY AND HOW DOES IT WORK? Plasma display panels consist of two thin panels of mounted glass found within the screen. The panels are made up of an array of cells, known as pixels, which are tiny pockets composed of compressed gas. Each pixel contains three sub pixels made up of red, green and blue phosphors. When an electrical current is applied to a pixel, the gas reacts to form plasma, which in turn produces UV light. The light reacts with the phosphors to produce the colors you see on the screen. Because all the pixels emit light at the same time, the viewers never see a flickering screen. Pixel: The smallest discrete component of an image or picture on a screen (usually a colored dot); "the greater the number of pixels per inch the greater the resolution." -- WordNet ® 2.0, © 2003 Princeton University LCD AND DLP™ PROJECTOR TECHNOLOGIES. WHAT'S THE DIFFERENCE? Projectors are categorized into the following two primary technologies, which reference the internal mechanisms used to compose an image: LCD (LIQUID CRYSTAL DISPLAY) projectors contain three separate LCD glass panels, one for red, green, and blue components of the image. As light passes through the LCD panels, individual pixels can be opened to allow light to pass or closed to block the light. This activity modulates the light and produces the image that is projected onto the screen. LCD advantages include images with deep saturated colors that are sharp and accurate, bright images and low costs for greater affordability. DLP (DIGITAL LIGHT PROCESSING) Developed by Texas Instruments, the DLP chip is a reflective surface made up of thousands of tiny mirrors. Each mirror represents a single pixel. In a DLP projector, light from the projector's lamp is directed onto the surface of the DLP chip. A color wheel consisting of red, green, blue and sometimes clear segments spins between the lamp and the chip to modulate the color. The mirrors move back and forth, directing light either into the lens path or away from the lens path. DLP technology offers a very high contrast ratio, with less space between pixels (reduces screen door effect) for smoother images, along with fewer components, allowing the projector to be packaged into an extremely compact design. For more information on NEC's industry-leading large screen displays, please contact us at 800 NEC-INFO or visit www.necvisualsystems.com The opinions expressed in this document are those of NEC Solutions America, Inc., based on the current state of large screen display technologies as of September 2004. NEC 090403 NEC is a registered trademark of NEC Corporation. All other trademarks are the property of their respective owners. All specifications and programs are subject to change without notice. DLP™ is a trademark of Texas Instruments. ©2004 NEC Solutions (America) Inc Visual Systems Division 1250 Arlington Heights Rd., Suite 400 Itasca, IL 60143-1248