Inventor
Masahiko Yatsu
Inventor
Fujisawa, JP
Overview
Patents· 127 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Bprimary
G03BApparatus or arrangements for taking photographs or for projecting or viewing them28%
G02BOptical elements, systems or apparatus27%
H04NPictorial communication, e.g. television23%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein4%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles4%
F21SNon-portable lighting devices2%
G09GArrangements or circuits for control of indicating devices using static means to present variable information2%
B60QArrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general1%
F21YIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to the form or the kind of the light sources or of the colour of the light emitted1%
G06FElectric digital data processing1%
PatentTitleYear
11,119,315Information display apparatus202111,016,380Projection video display apparatus202110,983,342Light source apparatus and head up display apparatus202110,942,353Information display device202110,895,744Head-up display apparatus and image display apparatus thereof202110,890,763Information display apparatus202110,890,833Projection-type image apparatus202110,852,539Projection optical system, head-up display device, and vehicle202010,814,723Projection optical system, and head-up display device202010,788,665Projection optical system and head-up display device202010,746,904Free-form surface lens, method of designing free-form surface lens, free-form surface mirror, method of designing free-form surface mirror, and projection type video display apparatus202010,705,333Projection optical system and head-up display apparatus using the same202010,690,911Projection optical system and head-up display device202010,678,017Projection image display device202010,670,864Information display device202010,606,161Projection video display apparatus202010,545,334Flare-cut member, lens device, and optical device202010,444,606Projection lens assembly method and projection image display apparatus201910,309,602Vehicular lighting apparatus201910,310,257Head-up display device201910,265,831Method for manufacturing lens, method for manufacturing molding die for lens, method for manufacturing mirror, method for manufacturing molding die for mirror, lens and molding die for lens201910,214,141Headlight device and vehicle device using same201910,185,060Free-form surface lens, method of designing free-form surface lens, free-form surface mirror, method of designing free-form surface mirror, and projection type video display apparatus201910,100,995Vehicular lighting apparatus201810,066,802Vehicular lighting apparatus20189,581,795'Projection-type video display device'20179,429,832'Oblique projection optical system and projection type display apparatus using the same'20169,372,387'Laser projector'20169,348,210'Projection apparatus and transparent screen for it'20169,116,349'Image display device'20159,022,581'Projection display system with two reflecting mirrors'20158,733,953'Display apparatus and projection type lighting apparatus therefor'20148,690,349'Oblique projection optical system and projection type display apparatus using the same'20148,690,345'Projection image display apparatus having a first lens and a second lens adjacent to the screen'20148,616,711'Oblique projector having movable free form lenses'20138,585,209'Projection apparatus with linear fresnel lens and transparent screen therefor'20138,585,216'Video projector which obliquely projects images onto screen'20138,573,787'Projection type display apparatus'20138,441,582'Imaging displaying apparatus and 3-D image displaying apparatus applying the same therein'20138,425,049'Oblique projection optical system and projection type display apparatus using the same'20138,408,717'Projection type image display apparatus'20138,403,504'Projection type display apparatus'20138,337,021'Optical projection type image display device'20128,313,199'Projection display system including lens group and reflecting mirror'20128,182,097'Projection type image display apparatus'20128,113,663'Projection image display apparatus and projection optical unit to be used therein'20128,075,142'Projection-type image display apparatus'2011D0647931'Lens for projector'20118,020,999'Projection type image display apparatus'2011D0645068'Lens for projector'20118,002,417'Projection-type image display apparatus'20118,002,418'Projection type image display apparatus'20117,982,958'Projection display'2011D0639076'Mirror for projector'20117,914,153'Projection type image display apparatus'20117,909,472'Projection-type image display apparatus'20117,901,097'Display apparatus and projection type lighting apparatus therefor'20117,896,507'Projection type display apparatus'20117,857,462'Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system'20107,850,313'Projection type image display apparatus'20107,806,566'Light source unit and projection type video display apparatus using the same'20107,780,296'Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system'20107,766,488'Projection type image display apparatus'20107,766,487'Projection-type image display apparatus'20107,712,911'Image display device and light diffusion component for use therein'20107,701,639'Projection type image display apparatus'20107,670,009'Projection-type image display apparatus'20107,665,849'Color separating unit and projection type video display apparatus provided with the same'20107,553,031'Projection image display apparatus and projection optical unit to be used therein'20097,553,025'Projection type image display apparatus, and optical unit and polarization splitting unit each used for the apparatus'20097,551,352'Image display apparatus, as well as, Fresnel lens sheet and screen to be used therein'20097,532,407'Projection display'20097,499,111'Projection type display device and back projection type display device using the same'20097,467,872'Projection optical unit and projection type video display device using the unit'20087,435,482'Article or transparent component having liquid repellent layer, optical lens having liquid repellent layer and production process thereof, and projection type display apparatus using the lens'20087,410,264'Image display apparatus forming optical image by irradiating light from light source onto image display element'20087,365,907'Rear projection image display apparatus'20087,327,520'Optical unit and image display apparatus'20087,303,283'Projection type display'20077,261,420'Projection optical unit and projection image display apparatus'20077,255,444'Optical unit and projection-type image display apparatus using the same'20077,241,015'Optical unit and projection type image display unit using it'20077,237,901'Projection type image display device, rear projection type image display device, optical unit, and screen unit'20077,232,227'Image display device'20077,222,965'Optical unit and a projection image display apparatus using the same'20077,220,005'Projection type video display apparatus'20077,210,797'Projector optical unit, projection type image display apparatus, and rear projection type image display apparatus'20077,198,390'Reflector, projective display and projector'20077,170,567'Projection type image display apparatus'20077,159,988'Projection optical unit and projection image display apparatus'20077,152,978'Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same'20067,142,367'Projection lens apparatus and projection type image display apparatus'20067,111,942'Reflection-type image projection unit and a reflection-type image display apparatus, and a light source device for use therein'20067,106,518'Optical unit and image display apparatus'20067,081,927'Optical projection apparatus, transmission type screen, and projection type image display apparatus'20067,059,725'Reflection-type image projection unit and a reflection-type image display apparatus, and a light source device for use therein'20067,014,319'Projection type color display device'20066,987,546'Projection type image display apparatus'20066,975,460'Projection lens apparatus and projection type image display apparatus'20056,963,453'Optical unit and image display apparatus'20056,956,624'Optical projection apparatus, transmission type screen, and projection type image display apparatus'20056,945,651'Optical unit and projection type projector apparatus using the same'20056,905,213'Projection apparatus and projection-type image display apparatus'20056,894,729'Optical projection apparatus, transmission type screen, and projection type image display apparatus'20056,869,184'Polarized-light converting unit and projector using the same'20056,832,836'Optical unit and projection type projector apparatus using the same'20046,829,031'Liquid crystal display apparatus and optical device for use therein'20046,824,273'Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same'20046,783,242'Projection apparatus and projection-type image display apparatus'20046,783,245'Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same'20046,741,396'Array lens, lighting optical system, optical unit and imaging apparatus'20046,705,730'Picture display device'20046,573,950'Optical projection apparatus, transmission type screen, and projection type image display apparatus'20036,567,218'Array lens, lighting optical system, optical unit and imaging apparatus'20036,560,041'Projection lens apparatus and projection type image display apparatus'20036,545,812'Array lens, lighting optical system, optical unit and imaging apparatus'20036,535,267'Liquid crystal display apparatus having liquid crystal display element immersed in cooling medium'20036,416,182'Projection type liquid crystal display device'20026,411,440'Array lens, lighting optical system, optical unit and imaging apparatus'20026,392,809'Array lens, lighting optical system, optical unit and imaging apparatus'20026,290,360'Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same'20016,256,083'Liquid crystal display apparatus and optical device for use therein'20016,201,645'Array lens, lighting optical system, optical unit and imaging apparatus'20016,062,695'Projection type liquid crystal display device'20005,748,238'Video camera'19985,565,919'Video camera/VTR and camera station with opto-electronic link between camera/VTR and camera station'19965,048,939'Zoom lens system'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2013Patents assigned to HITACHI LTD (83)· patent assignee history
2000–2016Based in Fujisawa, JP· patent location history
2005–2008Based in Tokyo, JP· patent location history
2011–2015Patents assigned to YATSU MASAHIKO (17)· patent assignee history
2011–2015Patents assigned to HIRATA KOJI (16)· patent assignee history
2011–2016Patents assigned to HITACHI CONSUMER ELECTRONICS (14)· patent assignee history
2015–2020Based in Ibaraki, JP· patent location history
2018–2021Patents assigned to MAXELL LTD (25)· patent assignee history
2018–2020Based in Osaka, JP· patent location history
2019–2021Based in Kyoto, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 83 | 1991–2013 |
| MAXELL LTD | 25 | 2018–2021 |
| YATSU MASAHIKOself | 17 | 2011–2015 |
| HIRATA KOJI | 16 | 2011–2015 |
| HITACHI CONSUMER ELECTRONICS | 14 | 2011–2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Fujisawa, JP | 93 | 2000–2016 |
| Kyoto, JP | 11 | 2019–2021 |
| Osaka, JP | 9 | 2018–2020 |
| Ibaraki, JP | 6 | 2015–2020 |
| Tokyo, JP | 3 | 2005–2008 |