LASERS TRANSFORM LIGHT ENGINES At the heart of all microdisplay-based projection systems is the light engine—the most common are branded under the DLP™ or 3LCD™ categories, and several LCOS varieties are also becoming popular. This engine is the set of optics and electronics that illuminates and projects red, green and blue (RGB) light onto the screen. Necsel simplifies all types of light engine configurations, reducing system cost. It allows smaller light engines, shrinking overall unit size. And it enhances performance, enabling a brighter, more colorful, more efficient display product. ADVANTAGES FOR 3LCD 3LCD WITH LAMP A 3LCD™ engine homogenizes and splits white light from a UHP lamp into the three RGB primaries using dichroic filters. It then generates images from three transmissive high-temperature polysilicon (3LCD) panels, one for each of the red, green, and blue. These images are recombined and projected onto the screen. 3LCD WITH NECSEL A Necsel 3LCD light engine is a simple combination of single red, green, and blue lasers that project high-power homogenized light directly onto the three LCD panels. Necsel eliminates the need for polarizers, polarization recovery, color filters, turning mirrors, UV and IR filters, fly’s-eye lenses and several field lenses. For more detailed information on 3LCD technology, see www.3lcd.com. ADVANTAGES FOR DLP DLP WITH LAMP In a DLP™ system, light from a UHP arc lamp is passed through a filter wheel in rapid sequence to transmit red, green and blue primaries. This RGB light passes into a light tunnel for homogenization and then onto the microdisplay. DLP WITH NECSEL In a Necsel-based DLP system, the light engine is a combination of a red, a green, and a blue laser that projects high-power light directly onto the microdisplay. Necsel technology eliminates the need for a color wheel, light tunnel, UV and IR filters, and relay optics. For more detailed information on DLP technology, see www.dlp.com.