2-channel display system comprising micro electro mechanical systems
OwnerBernhard Rudolf Bausenwein, Max Mayerinventors
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Abstract
The 2-channel display system with micro electromechanical systems (MEMS, e.g. DMDs from Texas Instruments) simultaneously generates a right and a left image in two discrete modulation channels, which differ by the polarization of their light beams. More specifically, the invention relates to the chirality (handedness) of MEMS and the geometric problems associated with this handedness in superposition systems. In this application we uncover a solution to superpose the images modulated by identical MEMSs (imagers of the same isomer type) without additional mirroring.
Claims16
A 2-channel display system comprising
- two spatially separate channels, simultaneously feeding two polarization coded images into a common light path out of which said images may be separated by a polarization decoding system;
- light of at least one light source, comprising at least 3 spectral components, which are sufficient to span a color space, feeding the two channels;
- a polarization split system PBS1 with a plane of incidence P1POI, generating two spatially separated light beams of a different linear polarization feeding the two channels;
- SLMs (spatial light modulators) which are MEMSs (Micro Electro Mechanical System), at least one in each channel, characterized by modulating light via the direction of the reflection of the incident light beam;
- MEMSs positioned such that the axis of the incident light beam differs from the axis of the modulated “ON”-light beam, the modulated “ON” beam being reflected normal to the MEMS surface;
- a polarization combining system PBS2 with a plane of incidence P2POI for superimposing the two spatially modulated “ON” light beams of each channel into a common “ON” light beam, said PBS2 being spatially separated from PBS1;
- MEMSs rotated so that the mirror deflection axes of the MEMSs of the two channels are perpendicular in their virtual projection in the superposition image.
A 2-channel display system comprising
- two spatially separate channels, simultaneously feeding two polarization coded images into a common light path out of which said images may be separated by a polarization decoding system;
- light of at least two light sources, comprising at least 3 spectral components, which are sufficient to span a color space, feeding the two channels;
- polarization conversion systems, generating two spatially separated light beams of a different linear polarization feeding the two channels;
- SLM (spatial light modulators) which are MEMSs (Micro Electro Mechanical System), at least one in each channel, characterized by modulating light via the direction of the reflection of the incident light beam;
- MEMSs positioned such that the axis of the incident light beam differs from the axis of the modulated “ON”-light beam, the modulated “ON” beam being reflected normal to the MEMS surface;
- a polarization combining system PBS2 with a plane of incidence P2POI for superimposing the two spatially modulated “ON” light beams of each channel into a common “ON” light beam, said PBS2 being spatially separated from the polarization conversion systems;
- MEMSs rotated so that the mirror deflection axes of the MEMSs of the two channels are perpendicular in their virtual projection in the superposition image.
Dependencies are inferred from the claim text.