Inventor
SAKATA HIDEFUMI
JP54 patents
⚠️ This page may combine multiple inventors who share the name “SAKATA HIDEFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
47 patentsUS7159987B2Jan 9, 2007
Display device, lighting device and projector
SEIKO EPSON CORP51 citations96
US7034808B2Apr 25, 2006
Touch panel and electronic device
SEIKO EPSON CORP57 citations96
US6644832B2Nov 11, 2003
Illumination device and manufacturing method therefor, display device, and electronic instrument
SEIKO EPSON CORP57 citations96
US6592224B2Jul 15, 2003
Optical reflection polarizer and projector comprising the same
SEIKO EPSON CORP47 citations96
US7287860B2Oct 30, 2007
Display device, display method, and projector
SEIKO EPSON CORP46 citations93
US7192147B2Mar 20, 2007
Lighting system and projector
SEIKO EPSON CORP41 citations93
US7088347B2Aug 8, 2006
Coordinate input device detecting touch on board associated with liquid crystal display, and electronic device therefor
SEIKO EPSON CORP44 citations93
US6764182B2Jul 20, 2004
Light reflective polarizer and projector using the same
SEIKO EPSON CORP17 citations93
US7360900B2Apr 22, 2008
Illuminating apparatus, image display apparatus, and projector
SEIKO EPSON CORP40 citations92
US7325932B2Feb 5, 2008
Display device, lighting device and projector
SEIKO EPSON CORP17 citations92
US7293880B2Nov 13, 2007
Light source including multiple light emitting devices driven by a control device, and projector
SEIKO EPSON CORP14 citations84
US7270427B2Sep 18, 2007
Display device, lighting device and projector
SEIKO EPSON CORP10 citations84
US8007141B2Aug 30, 2011
Diffraction optical element, lighting device, and projector
SEIKO EPSON CORP9 citations83
US7946708B2May 24, 2011
Display device that projects a virtual image display
SEIKO EPSON CORP18 citations83
US7484850B2Feb 3, 2009
Illuminating device and projector
SEIKO EPSON CORP10 citations83
US5673241ASep 30, 1997
Focus detection mechanism and optical head and optical storage device that use it
SEIKO EPSON CORP14 citations74
US11815796B2Nov 14, 2023
Light source apparatus and projector
SEIKO EPSON CORP2 citations73
US11181814B2Nov 23, 2021
Light source device and projector
SEIKO EPSON CORP4 citations73
US11150548B2Oct 19, 2021
Light source apparatus and projector
SEIKO EPSON CORP3 citations73
US10203590B2Feb 12, 2019
Illuminator and projector
SEIKO EPSON CORP3 citations73
US9918055B2Mar 13, 2018
Polarization converting element, light source device, lighting device, and projector
SEIKO EPSON CORP3 citations73
US5436876AJul 25, 1995
Optical head and optical memory device
SEIKO EPSON CORP15 citations73
US9563109B2Feb 7, 2017
Light source device with wavelength conversion element and projector including the same
SEIKO EPSON CORP2 citations72
US11022869B2Jun 1, 2021
Light source apparatus and projector
SEIKO EPSON CORP3 citations71
US11079666B2Aug 3, 2021
Light source device and projector
SEIKO EPSON CORP2 citations70
US11101415B2Aug 24, 2021
Light source apparatus and projector
SEIKO EPSON CORP1 citations63
US9323045B2Apr 26, 2016
Illumination device and projector
SEIKO EPSON CORP2 citations63
US7972009B2Jul 5, 2011
Projector and projection unit
SEIKO EPSON CORP4 citations63
US7809209B2Oct 5, 2010
Image display device, and control method for the same
SEIKO EPSON CORP2 citations63
US6944375B2Sep 13, 2005
Optical element and illuminator and projection display device
SEIKO EPSON CORP3 citations63
US10746931B2Aug 18, 2020
Light source device and projector
SEIKO EPSON CORP1 citations62
US9423680B2Aug 23, 2016
Light source apparatus that irradiates a phosphor layer with excitation light and projector
SEIKO EPSON CORP2 citations62
US11669006B2Jun 6, 2023
Light guiding unit, light source apparatus, and projector
SEIKO EPSON CORP1 citations61
US11187970B2Nov 30, 2021
Light source apparatus having side by side light guide and wavelength converter
SEIKO EPSON CORP1 citations61
US11175574B2Nov 16, 2021
Light source apparatus and projector
SEIKO EPSON CORP0 citations61
US10921698B2Feb 16, 2021
Light source device, projector, and phosphor rod
SEIKO EPSON CORP0 citations61
US12461436B2Nov 4, 2025
Projector
SEIKO EPSON CORP0 citations52
US11323670B2May 3, 2022
Light emitting apparatus and projector
SEIKO EPSON CORP0 citations52
US11287729B2Mar 29, 2022
Light source device and projector
SEIKO EPSON CORP0 citations52
US10957828B2Mar 23, 2021
Light source apparatus and projector
SEIKO EPSON CORP0 citations52
US10061105B2Aug 28, 2018
Projection system, projector, and conversion lens for projector
SEIKO EPSON CORP0 citations52
US9860493B2Jan 2, 2018
Illumination device and projector
SEIKO EPSON CORP1 citations52
US7576313B2Aug 18, 2009
Light source device and image display device
SEIKO EPSON CORP1 citations52
US12393111B2Aug 19, 2025
Light source device and projector
SEIKO EPSON CORP0 citations50
US11347141B2May 31, 2022
Light source device and projector
SEIKO EPSON CORP0 citations50
US12596294B2Apr 7, 2026
Light source apparatus and projector
SEIKO EPSON CORP0 citations48
US12578633B2Mar 17, 2026
Light source apparatus and projector
SEIKO EPSON CORP0 citations48
SAKATA HIDEFUMI
3 patentsUS8678596B2Mar 25, 2014
Illumination device and projector with fluorescent plate
SAKATA HIDEFUMI26 citations91
US8132918B2Mar 13, 2012
Illumination apparatus, projector, and polarization conversion element
SAKATA HIDEFUMI2 citations62
US8506128B2Aug 13, 2013
Light source device, illumination system, and projector
SAKATA HIDEFUMI3 citations61
Showing the top 50 of 54 patents by PatentIndex Score.