TIR prisms and use of backlight for LCoS microdisplay illumination
AssigneeMicrosoft Technology Licensing, LLC
InventorsIshan Chatterjee, Dmitry Reshidko, Bernard Charles Kress
Life of this patent
Estimating the term…
Abstract
A display engine adapted for use in a head-mounted display (HMD) device includes a reflective liquid crystal on silicon (LCoS) spatial light modulator (SLM) that is illuminated using a backlight illumination module and a pair of optical prisms providing a total internal reflection (TIR) function. In an illustrative mixed-reality embodiment, the TIR prism pair guides light to the LCoS SLM from the backlight illumination module and projects virtual images reflected from the LCoS SLM, through projection optics, to a diffractive waveguide combiner for viewing by an HMD user.
Claims9
A display engine adapted for use with a head-mounted display (HIVID) device, comprising:
- an LCoS (liquid crystal on silicon) spatial light modulator (SLM);
- a backlight illumination module configured to provide illumination to the LCoS SLM for projecting virtual images for display by the HMD device;
- and
- a pair of TIR (total internal reflection) prisms configured to provide a folded light path for the LCoS SLM illumination, the folded light path comprising a refraction path and a TIR path.
Dependencies are inferred from the claim text.