Design and Integration of a Speckle-free Device Used in Laser Projection Displays

Laser as a light source for displays can provide high optical efficiency, high color saturation (good color gamut) and more veritable reflection of reality. A main restriction for laser’s application in displays is its inherent speckle phenomena.

When a laser beam irradiates a rough screen and is detected by a square-law detector (pupil, camera et. al) with finite aperture, the fluctuation in optical intensity will be observed due to the temporal and/or spatial coherence of laser source. Image information will be masked, and the main task for laser displays is how to suppress this drawback aspect.

In this project we’ll develop an effective speckle suppression device, integrate it in laser projection displays and popularize it in portable equipments, such as laptop, cell phone and so on.

The Ph.D. thesis will last 4 years and the main work includes:

1. Innovative speckle free system design
2. Designing, modeling and simulating the Micro-Opto-Electro-Mechanical Systems (MOEMS) device for speckle reduction
3. System integration
4. System characterization