ULTRA-MOBILE PROJECTOR using DigiLens D-LEDC Light Engine

The DigiLens® can be configured to provide many different LED ultra portable projector architectures. Duel panel LCoS, single panel LCoS, and multi-chip solutions with polarization recycling are all possible in the future. As single panel silicon on sapphire SoS transmissive microdisplay improve transmission aperture, more compact projector solutions may also become viable market solutions.

DigiLens LED RGB Array is widely separated for excellent cooling

SBG Labs' LED compact projector is capable of delivering 200 lumens on screen from a Spatial Photonics MEMS Microdisplay. An important feature of SBG Lab’s light engine is the ability to dynamically control LED duty cycle allowing contrast to be increased at the expense of brightness.

The duty cycle control scheme takes advantage of LC relaxation during the duty cycle down time. Overall power consumption based on current Luminus data will be in the region of 35-55W. Typical maximum forward voltages (green) are 5.5V and pulse drive currents around 10A.

Typical throughput data for a MEMS projector powered by PT-54 LEDs is given in the downloadable White Paper. In it, a table summarizes the available input lumens and duty cycle as dictated by the desired white point (6500K). After applying optical losses arising from the DigiLens®, and refractive optics (including the prisms; condenser, relay and projection lens; and the display panel), over 200lms light engine lumens is now possible. This will only improve with Haitz Law.