Inventor
Kenneth A. Epstein
Inventor
St. Paul, MN, US
Overview
Patents· 74 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus37%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein27%
F21VFunctional features or details of lighting devices or systems thereof5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
G09FDisplaying4%
H10HInorganic light-emitting semiconductor devices having potential barriers4%
H04NPictorial communication, e.g. television2%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h102%
C09KMaterials for miscellaneous applications, not provided for elsewhere1%
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%
PatentTitleYear
11,099,314Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane202110,955,592Multiplexing backlight with asymmetric turning film202110,837,622Collimating step-wedge light guide202010,809,445Light control film for display assemblies202010,732,344Collimating light guide202010,388,230Temporally multiplexing backlight with asymmetric turning film201910,371,350Asymmetric turning film with multiple light sources201910,288,796Optical film201910,114,162Optical film stack with retardance layer having in-plane retardance of greater than 2.0 microns201810,031,260Object sensor20189,804,311'Higher transmission light control film comprising a transmissive region and an absorptive region each having a different index of refraction'20179,773,847'Antireflective OLED construction'20179,761,843'Emissive display with hybrid polarizer'20179,690,038'Systems and methods for controlling backlight output characteristics'20179,335,449'Higher transmission light control film'20169,001,286'Brightness enhancing film and film based diffuser for improved illumination uniformity of displays'20158,848,132'Hollow backlight with structured films'20148,794,809'Light injection coupler for coupling light guides'20148,757,858'Hollow backlight with tilted light source'20148,690,373'Back-lit displays with high illumination uniformity'20148,588,574'Backlight with structured surfaces'20138,579,492'Optical film having microreplicated structures and methods'20138,576,357'Liquid crystal displays with laminated diffuser plates'20138,562,145'Display system and method for projection onto non-planar surfaces'20138,246,220'LED array systems'20128,125,589'Direct-LIT liquid crystal displays with laminated diffuser plates'20128,023,065'Optical element for lateral light spreading in edge-lit displays and system using same'20117,997,771'LED array systems'20117,903,194'Optical element for lateral light spreading in back-lit displays and system using same'20117,873,256'Backlight with structured surfaces'20117,789,538'Back-lit displays with high illumination uniformity'20107,766,528'Back-lit displays with high illumination uniformity'20107,710,511'Liquid crystal displays with laminated diffuser plates'20107,695,180'Illumination assembly and system'20107,637,639'LED emitter with radial prismatic light diverter'20097,497,608'Phosphor based illumination system having a long pass reflector and method of making same'20097,478,913'Back-lit displays with high illumination uniformity'20097,446,827'Direct-lit liquid crystal displays with laminated diffuser plates'20087,436,469'Composite diffuser plates and direct-lit liquid crystal displays using same'20087,407,313'Phosphor based illumination system having a plurality of light guides and a display using same'20087,385,659'Structured transflectors for enhanced ambient and backlight operation of transmissive liquid crystal displays'20087,377,679'Phosphor based illumination system having a plurality of light guides and a display using same'20087,357,554'Phosphor based illumination system having a light guide, an interference reflector and a display'20087,357,555'Phosphor based illumination system having an interference reflector and a display'20087,350,953'Phosphor based illumination system having a short pass reflector and method of making same'20087,322,731'Color mixing illumination light unit and system using same'20087,303,322'Multiple lightguide backlight'20077,303,315'Illumination assembly using circuitized strips'20077,255,469'Phosphor based illumination system having a light guide and an interference reflector'20077,223,005'Hybrid lightguide backlight'20077,221,847'Optical elements having programmed optical structures'20077,213,958'Phosphor based illumination system having light guide and an interference reflector'20077,204,631'Phosphor based illumination system having a plurality of light guides and an interference reflector'20077,204,630'Phosphor based illumination system having a plurality of light guides and an interference reflector'20077,182,498'Phosphor based illumination system having a plurality of light guides and an interference reflector'20077,088,405'Structured transflectors for enhanced ambient and backlight operation of transmissive liquid crystal displays'20067,052,168'Illumination device'20066,845,212'Optical element having programmed optical structures'20056,801,276'Optical component with a structured element'20046,707,611'Optical film with variable angle prisms'20046,592,234'Frontlit display'20036,576,887'Light guide for use with backlit display'20036,560,026'Optical film with variable angle prisms'20036,508,560'Display apparatus with corrosion-resistant light directing film'20036,447,135'Lightguide having a directly secured reflector and method of making the same'20026,379,016'Light guide with extraction structures'20026,357,880'Display apparatus with corrosion-resistant light directing film'20026,356,391'Optical film with variable angle prisms'20026,264,336'Display apparatus with corrosion-resistant light directing film'20016,139,924'Chiral liquid crystal compounds having a fluorinated terminal portion'20005,976,686'Diffuse reflective articles'19995,894,539'Line light source having light pipe with rectangular cross-section'19995,608,550'Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector'19975,417,883'Process for controlling layer spacing in mixtures of smectic liquid crystal compounds'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–1999Patents assigned to MINNESOTA MINING & MFG (3)· patent assignee history
1995–2021Based in St. Paul, MN, US· patent location history
1999–2021Patents assigned to 3M INNOVATIVE PROPERTIES CO (69)· patent assignee history
2007–2018Patents assigned to EPSTEIN KENNETH A (15)· patent assignee history
2007–2017Patents assigned to LAMB DAVID J (3)· patent assignee history
2013–2017Patents assigned to KO BYUNG-SOO (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| 3M INNOVATIVE PROPERTIES CO | 69 | 1999–2021 |
| EPSTEIN KENNETH Aself | 15 | 2007–2018 |
| KO BYUNG-SOO | 3 | 2013–2017 |
| LAMB DAVID J | 3 | 2007–2017 |
| MINNESOTA MINING & MFG | 3 | 1995–1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Paul, Minnesota, US | 74 | 1995–2021 |