Projector Speckle Reduction

About

Background: Lasers are superior to LEDs as light sources for projection displays. They can cover much a broader colour gamut, are capable of achieving a higher level of brightness, have a longer lifetime and higher electrical-to-optical efficiency making them less expensive to run. Unfortunately, lasers are not perfect light sources. There exists a deleterious effect that is specific to laser displays – a phenomenon called speckle. Speckle is caused by the interference of wavefronts originating from the laser, causing localized spots o high and low intensity that reduce image quality. Speckle reduction methods generally try and “average out” these intensities to create a more uniform image. Technology Overview: The proposed technology provides a motionless speckle reduction method that significantly improves image quality of any laser display system and is easy to setup. It is fully compatible with laser sources from a single laser or multiple-laser setup, such as an RGB laser for a typical projection display. It may also be used to interface with a multi laser array. Stage of Development: Prototypes and demos installed. 19-058, 18-059