Inventor
MARUYAMA TAKESUKE
JP36 patents
⚠️ This page may combine multiple inventors who share the name “MARUYAMA TAKESUKE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
30 patentsUS4920420AApr 24, 1990
Automatic focusing system
HITACHI LTD72 citations96
US6290360B1Sep 18, 2001
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD59 citations95
US5491525AFeb 13, 1996
Illumination unit for liquid crystal projection display apparatus and liquid crystal display apparatus having it used
HITACHI LTD91 citations95
US6783245B2Aug 31, 2004
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD17 citations92
US6411440B2Jun 25, 2002
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD19 citations92
US6201645B1Mar 13, 2001
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD21 citations92
US5748238AMay 5, 1998
Video camera
HITACHI LTD30 citations92
US5684548ANov 4, 1997
Liquid crystal display element and micro-lens arrangement and a display using the same
HITACHI LTD19 citations92
US5455694AOct 3, 1995
Liquid crystal display with pixel shape same as image of light source through microlens
HITACHI LTD24 citations92
US6462794B1Oct 8, 2002
Image forming unit, enlarging unit, optical parts, and image display apparatus having these components
HITACHI LTD46 citations91
US4246560AJan 20, 1981
Self-converging deflection yoke
HITACHI LTD31 citations91
US4941719AJul 17, 1990
Light scanning system
HITACHI LTD39 citations89
US6392809B2May 21, 2002
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD10 citations82
US4557567ADec 10, 1985
Lens system with plastic lenses compensating for temperature changes
HITACHI LTD20 citations82
US6741396B2May 25, 2004
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD6 citations74
US6567218B2May 20, 2003
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD3 citations74
US6824273B2Nov 30, 2004
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD9 citations73
US5565919AOct 15, 1996
Video camera/VTR and camera station with opto-electronic link between camera/VTR and camera station
HITACHI LTD13 citations73
US5048939ASep 17, 1991
Zoom lens system
HITACHI LTD10 citations73
US4842387AJun 27, 1989
Automatic focusing apparatus for use in video camera and the like
HITACHI LTD14 citations73
US4740676AApr 26, 1988
Range finding automatic focusing system employing a rotatable transparent plate and a half-split light receiving element
HITACHI LTD19 citations73
US6351295B2Feb 26, 2002
Projection type liquid crystal display device
HITACHI LTD6 citations72
US6307601B1Oct 23, 2001
Projection type liquid crystal display device
HITACHI LTD10 citations72
USRE38175EJul 8, 2003
Liquid crystal display element and micro-lens arrangement and a display using the same
HITACHI LTD4 citations62
US4782356ANov 1, 1988
Automatic focusing apparatus
HITACHI LTD5 citations62
US4096462AJun 20, 1978
Deflection yoke device for use in color television receiver sets
HITACHI LTD5 citations60
US7327520B2Feb 5, 2008
Optical unit and image display apparatus
HITACHI LTD0 citations52
US7106518B2Sep 12, 2006
Optical unit and image display apparatus
HITACHI LTD0 citations52
US6963453B2Nov 8, 2005
Optical unit and image display apparatus
HITACHI LTD0 citations52
US6545812B2Apr 8, 2003
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD0 citations52
HITACHI MAXELL
5 patentsUS7414796B2Aug 19, 2008
Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same
HITACHI MAXELL12 citations92
US6678096B2Jan 13, 2004
Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same
HITACHI MAXELL22 citations92
US6836378B2Dec 28, 2004
Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same
HITACHI MAXELL5 citations73
US7733578B2Jun 8, 2010
Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same
HITACHI MAXELL0 citations52
US6965482B2Nov 15, 2005
Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same
HITACHI MAXELL0 citations52