Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PROJECTION-TYPE VIDEO DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/003435
Kind Code:
A1
Abstract:
The present invention makes it possible to adjust an image position even when a converter lens for changing the aspect ratio of a display image is attached. A projection lens unit 102 is attached to a display device main body 101 and projects a video formed by the display device main body 101. A converter lens unit 103 is attached between the display device main body 101 and the projection lens unit 102 when the aspect ratio of the video formed by the display device main body 101 is to be changed. The display device main body 101 includes a first video adjusting unit which is composed of a main body control unit 122 and a lens shift drive unit 124 and which adjusts the video projected by the projection lens unit 102. The converter lens unit 103 includes a second video adjusting unit which is composed of a control unit 131 and a lens shift drive unit 133 and which adjusts the video projected by the converter lens unit 103. The first video adjusting unit does not adjust the video if the second lens unit is attached.

Inventors:
NAKAMURA HIROYUKI (JP)
SHIKITA KAZUO (JP)
NAKAYAMA SATOSHI (JP)
HOTTA NOBUTAKA (JP)
SINNJI HIROYUKI (JP)
Application Number:
PCT/JP2017/024215
Publication Date:
January 03, 2019
Filing Date:
June 30, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MAXELL LTD (JP)
HITACHI IND & CONTROL SOLUTIONS LTD (JP)
International Classes:
G03B21/14; G03B21/00
Foreign References:
JP2013092712A2013-05-16
JP2009300526A2009-12-24
JP2010186150A2010-08-26
JP2005072887A2005-03-17
Attorney, Agent or Firm:
TSUTSUI & ASSOCIATES (JP)
Download PDF: