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Title:
PROJECTION-TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/043040
Kind Code:
A1
Abstract:
Provided is a projection-type display device capable of changing the brightness of a displayed image on a section basis. A projection-type display device (10) is provided with: a reflection-type spatial optical modulation unit (20) having a plurality of movable reflection elements (21); a light source unit (30); and a control unit (40) that controls the reflection-type spatial optical modulation unit (20) and the light source unit (30). The control unit (40) divides each frame (F) of a displayed image (200) into a display period (Fa) during which the light source unit (30) emits light and a non-display period (Fb) during which the light source unit (30) does not emit light. The control unit (40) further divides, among a plurality of sub-frames (SF) forming the frame (F), each of a plurality of display sub-frames (SFa) included in the display period (Fa) into a plurality of division display sub-frames (dSFa). The control unit (40) causes at least one of a plurality of the light emitting elements of the light source unit (30) to emit light for each of the display sub-frames (SFa), and sets respective inclined states of the plurality of movable reflection elements (21) for each of the division display sub-frames (dSFa).

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Inventors:
MORIYAMA KOHEI
HADA MAKOTO
Application Number:
PCT/JP2017/028524
Publication Date:
March 08, 2018
Filing Date:
August 07, 2017
Export Citation:
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Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G09G3/34; B60K35/00; G03B21/00; G03B21/14; G09G3/20; H04N5/74
Domestic Patent References:
WO2013046774A12013-04-04
WO2013129040A12013-09-06
Foreign References:
JP2007122018A2007-05-17
US20090147154A12009-06-11
JP2014010417A2014-01-20
Other References:
See also references of EP 3509056A4
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