Inventor
YAJIMA AKITAKA
JP50 patents
Patents
50 patentsUS6404550B1Jun 11, 2002
Optical element suitable for projection display apparatus
SEIKO EPSON CORP141 citations99
US5865521AFeb 2, 1999
Projection-type display apparatus
SEIKO EPSON CORP92 citations99
US6652104B2Nov 25, 2003
Correction of image distortion
SEIKO EPSON CORP99 citations98
US6529250B1Mar 4, 2003
Projector
SEIKO EPSON CORP53 citations96
US6268799B1Jul 31, 2001
Light-source lamp unit, light-source device and projection-type display apparatus and method of use
SEIKO EPSON CORP50 citations96
US6084714AJul 4, 2000
Polarizing illumination device and projection display device
SEIKO EPSON CORP63 citations96
US6000802ADec 14, 1999
Projection-type display apparatus
SEIKO EPSON CORP52 citations96
US5978136ANov 2, 1999
Optical element, polarization illumination device, and projection display apparatus
SEIKO EPSON CORP87 citations96
US5743610AApr 28, 1998
Projection-type display apparatus
SEIKO EPSON CORP102 citations96
US5626409AMay 6, 1997
Projection-type display apparatus
SEIKO EPSON CORP70 citations96
US5191450AMar 2, 1993
Projection-type color display device having a driving circuit for producing a mirror-like image
SEIKO EPSON CORP67 citations96
US4850685AJul 25, 1989
Projection-type color display device
SEIKO EPSON CORP110 citations96
US6778228B2Aug 17, 2004
Projection-type display apparatus
SEIKO EPSON CORP40 citations93
US6523962B2Feb 25, 2003
Optical element suitable for projection display apparatus
SEIKO EPSON CORP17 citations93
US6394607B1May 28, 2002
Polarized light separation device, method of fabricating the same and projection display apparatus using the polarized light separation device
SEIKO EPSON CORP50 citations93
US6095653AAug 1, 2000
Projection-type display apparatus
SEIKO EPSON CORP26 citations93
US5909944AJun 8, 1999
Projection-type display apparatus
SEIKO EPSON CORP26 citations93
US4909601AMar 20, 1990
Projection-type color display device with light valves positioned at unequal distances from the light source
SEIKO EPSON CORP48 citations93
US7006004B2Feb 28, 2006
Light-source lamp unit, light-source device and projection-type display apparatus
SEIKO EPSON CORP16 citations92
US6690282B2Feb 10, 2004
Light-source lamp unit, light-source device and projection-type display apparatus
SEIKO EPSON CORP22 citations92
USRE38084EApr 22, 2003
Projector
SEIKO EPSON CORP16 citations92
US6540360B2Apr 1, 2003
Projector
SEIKO EPSON CORP20 citations92
US6309073B1Oct 30, 2001
Projector
SEIKO EPSON CORP23 citations92
US6141150AOct 31, 2000
Dichroic prism, prism unit, and projection display apparatus
SEIKO EPSON CORP25 citations92
US6120152ASep 19, 2000
Projection-type display apparatus
SEIKO EPSON CORP31 citations92
USD420455SFeb 8, 2000
Replacement lamp for projector
SEIKO EPSON CORP21 citations92
US6072635AJun 6, 2000
Dichroic prism and projection display apparatus
SEIKO EPSON CORP15 citations82
USRE39859ESep 25, 2007
Dichroic prism, prism unit, and projection display apparatus
SEIKO EPSON CORP8 citations74
USRE39040EMar 28, 2006
Projector
SEIKO EPSON CORP6 citations74
US6669345B2Dec 30, 2003
Illumination system and projector
SEIKO EPSON CORP12 citations74
US6637886B2Oct 28, 2003
Projection display device
SEIKO EPSON CORP5 citations74
US6612702B1Sep 2, 2003
Projection display device
SEIKO EPSON CORP5 citations74
US6425667B1Jul 30, 2002
Projection lens unit and projector using the same
SEIKO EPSON CORP13 citations74
US6278500B1Aug 21, 2001
Liquid crystal device and projector display device having a specific relationship for the F-numbers of the illumination optical system
SEIKO EPSON CORP8 citations74
US6247817B1Jun 19, 2001
Projector
SEIKO EPSON CORP9 citations74
US6172815B1Jan 9, 2001
Dichroic prism and projection display apparatus
SEIKO EPSON CORP9 citations74
US6142634ANov 7, 2000
Projector
SEIKO EPSON CORP12 citations74
US9250507B2Feb 2, 2016
Projector
SEIKO EPSON CORP4 citations73
US6856375B2Feb 15, 2005
Liquid crystal light valve and projection display device including the same
SEIKO EPSON CORP9 citations73
US6315417B1Nov 13, 2001
Projector
SEIKO EPSON CORP7 citations73
USRE36850ESep 5, 2000
Projection-type display apparatus
SEIKO EPSON CORP4 citations73
USRE41680ESep 14, 2010
Projector
SEIKO EPSON CORP2 citations63
USRE40251EApr 22, 2008
Optical element, polarization illumination device, and projector
SEIKO EPSON CORP2 citations63
USRE39702EJun 26, 2007
Projector
SEIKO EPSON CORP1 citations63
USRE39243EAug 22, 2006
Optical element, polarization illumination device, and projector
SEIKO EPSON CORP2 citations63
USRE38740EJun 7, 2005
Dichroic prism and projection display apparatus
SEIKO EPSON CORP3 citations63
US6894845B2May 17, 2005
System and methods for providing a zoom lens device
SEIKO EPSON CORP5 citations63
US7267443B2Sep 11, 2007
Light-modulating projector
SEIKO EPSON CORP2 citations62
US6517208B1Feb 11, 2003
Illumination system and projector
SEIKO EPSON CORP1 citations52
US9794535B2Oct 17, 2017
Display device
SEIKO EPSON CORP0 citations42