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1. (WO2018179980) PROJECTION DEVICE, PROJECTION IMAGE CONTROL METHOD, AND RECORDING MEDIUM HAVING PROJECTION IMAGE CONTROL PROGRAM RECORDED THEREON

Pub. No.:    WO/2018/179980    International Application No.:    PCT/JP2018/005571
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Feb 17 00:59:59 CET 2018
IPC: H04N 5/74
G02B 5/32
G03B 21/14
G09G 5/00
H04N 9/31
Applicants: NEC CORPORATION
日本電気株式会社
NEC PLATFORMS, LTD.
NECプラットフォームズ株式会社
Inventors: KYOSUNA, Satoshi
京砂 悟
KOMATSU, Satoshi
小松 聖
TSUDA, Hirofumi
津田 尋史
Title: PROJECTION DEVICE, PROJECTION IMAGE CONTROL METHOD, AND RECORDING MEDIUM HAVING PROJECTION IMAGE CONTROL PROGRAM RECORDED THEREON
Abstract:
Provided is a projection device with which an improved projection image quality can be obtained without employing physical or optical countermeasures, and with which speckles can be reduced. The projection device is provided with at least: a laser light source which emits laser light; a conversion means 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.