technology update Thermal Inkjet Technology Thermal Inkjet Technology is based on HP’s disposable ink cartridges and printheads. Each printhead contains a small reservoir known as the firing chamber, filled with a tiny measure of ink. This ink is heated with a thin-film resistor layered above the firing chamber. As the ink heats up, it expands to form a bubble. The bubble expands until it bursts, at which point the ink is forced through the nozzle located below the firing chamber and out onto the paper. This process is repeated up to 12,000 times per second, and creates residual heat in the resistor.
A layer of silicon is placed above the resistor to cool it by transferring the residual heat awa ColorSmart II ColorSmart II is used by the PCL5 and PostScript drivers. This technology optimizes the color and halftoning for each element in a document (such as text, graphics, and photographs), providing consistent color treatment for everything on a page. ColorSmart II uses a smooth halftone for photographs and a detail halftone for text, raster graphics, and vector graphics. When transparencies are printed, HP ColorSmart II chooses specialized colors to provide the best projection quality. ColorSmart II is also the most reliable setting for PANTONE color reproduction.
ColorSmart III ColorSmart III enables the printer driver to scan the contents (text, graphics, and images) of pages to generate optimal settings for each document printed. ColorSmart III further extends ColorSmart technology with new image-enhancement tools: • HP SmartFocus—A new algorithm that improves image clarity in high-resolution files, as well as continues optimization for low-resolution images from the Internet or multimedia sources. Available with HPA. • HP Automatic Contrast Enhancement (ACE)—Brightens colors and sharpens details in images captured under poor lighting conditions. Available with HPA.
• sRGB (standard Red, Green, Blue) calibration—An industry peripheral color standard developed jointly by HP and Microsoft that improves color matching between the source image, monitor, and printed page. • Intel MMX/SIMD technology—Allows the driver to process media-rich data in parallel for faster processing of color and image graphics. • CIECAM97s—Improves color maps for more accurate skin tones and richer hues. • Object based color mapping enables optimum color quality. Available in PCL5. • Color control settings enable manual adjustment in saturation, brightness, and tone. Available in HPA. tour the product hp restricted 1-29