Projection device, projection image control method, and recording medium having projection image control program recorded thereon
US10859845B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 16, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Feb 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection device is provided with at least: a laser light source which emits laser light; a conversion unit which converts the laser light into parallel light; a phase-modulation-type spatial modulation element which phase-modulates the parallel light on the basis of a supplied projection image and delivers phase-modulated light; and a control unit. The control unit includes: a projection image storage unit in which at least one projection image group is stored; a processing unit which, with respect to one projection image acquired from the projection image storage unit in synchronism with an update period, generates a combination of a plurality of diffraction patterns in the update period; and a projection image generation unit which supplies the combination of a plurality of diffraction patterns to the phase-modulation-type spatial modulation element as the supplied projection image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.