公开(公告)号：US20200159047A1

公开(公告)日：2020-05-21

申请号：US16635399

申请日：2017-07-31

申请人： NEC CORPORATION

发明人： Satoshi KYOSUNA ,  Yoichiro MIZUNO ,  Koya TAKATA ,  Fujio OKUMURA

IPC分类号： G02F1/01 ,  H04B10/548

摘要： This communication device has a phase-modulation spatial light modulator; and a control unit which causes, during one frame time interval, the phase-modulation spatial light modulator to operate with first and second operation patterns. In a predetermined period within the one frame time interval, the first operation pattern includes a first light transmittable interval during which first signal light can be output, and a first pause interval during which the first signal light cannot be output whereas the second operation pattern includes a second light transmittable interval during which second signal light can be output, and a second pause interval during which the second signal light cannot be output. The first and second light transmittable intervals are each longer than a half of the predetermined period. The second pause interval is present within the first light transmittable interval, and the first pause interval is present within the second light transmittable interval.