Inventor
Karlton D. Powell
Inventor
Lake Stevens, WA, US
Overview
Patents· 65 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus33%
G06FElectric digital data processing14%
H04NPictorial communication, e.g. television11%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them7%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein7%
G06KGraphical data reading4%
G06VImage or video recognition or understanding4%
G09GArrangements or circuits for control of indicating devices using static means to present variable information4%
G01BMeasuring length, thickness or similar linear dimensions3%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices2%
PatentTitleYear
11,092,491Switchable multi-spectrum optical sensor202110,871,657Floating image display202010,845,508Optical stack including embedded diffuse surface202010,795,238Light reflection202010,725,643Touch-display accessory with relayed display plane202010,684,470Array-based floating display202010,666,848Remote depth sensing via relayed depth from diffusion202010,409,470Touch-display accessory with relayed display plane201910,359,640Floating image display201910,338,282Increased accuracy corner cube arrays for high resolution retro-reflective imaging applications201910,223,952Curved edge display with controlled distortion201910,191,188Array-based imaging relay201910,185,064Curved edge display with controlled luminance201910,048,532Display edge emission compensation201810,049,272User authentication using multiple capture techniques201810,015,378Kinematic mount for split camera201810,012,834Exit pupil-forming display with reconvergent sheet201810,001,8453D silhouette sensing system20189,958,585Computer vision depth sensing at video rate using depth from defocus20189,945,988Array-based camera lens system20189,864,119'Infrared filter with screened ink and an optically clear medium'20189,798,064'Hybrid concentrator for a backlight'20179,798,154'Control of polarization and diffractive artifact resolution in retro-imaging systems'20179,720,506'3D silhouette sensing system'20179,720,548'See-through IR frontlight with embedded partially reflective facets'20179,653,044'Interactive display system'20179,638,841'Laminated diffuser'20179,612,687'Auto-aligned illumination for interactive sensing in retro-reflective imaging applications'20179,599,757'Increased accuracy corner cube arrays for high resolution retro-reflective imaging applications'20179,535,537'Hover detection in an interactive display device'20179,494,726'Switchable backlight unit'20169,436,980'Reducing ghosting and other image artifacts in a wedge-based imaging system'20169,377,902'Systems and methods for wedge-based imaging using flat surfaces'20169,354,748'Optical stylus interaction'20169,355,345'Transparent tags with encoded data'20169,316,778'Hybrid concentrator for a backlight'20169,116,390'Touch sensing liquid crystal display compatible with linearly polarized sunglasses'20158,896,545'Angularly-selective sensor-in-pixel image detection'20148,749,529'Sensor-in-pixel display system with near infrared filter'20148,730,212'Illuminator for touch- and object-sensitive display'20148,619,062'Touch-pressure sensing in a display panel'20138,384,694'Infrared vision with liquid crystal display device'20138,231,224'Apparent speckle reduction via beam offset diversity in pupil space'20128,218,237'Rear-projection display'20128,111,336'Correcting scanned projector distortion by varying the scan amplitude'20128,004,760'Rear-projection display'20117,959,308'Substrate-guided display with improved image quality'20117,905,603'Substrate-guided display having polarization selective input structure'20117,839,575'Optical device for use with scanned beam light sources'20107,826,141'Scanned-beam heads-up display and related systems and methods'20107,791,810'Scanned beam display having high uniformity and diminished coherent artifacts'20107,736,006'Substrate-guided display with improved image quality'20107,715,103'Buried numerical aperture expander having transparent properties'20107,710,655'Display with image-guiding substrate'20107,656,585'Embedded relay lens for head-up displays or the like'20107,589,900'Eyebox shaping through virtual vignetting'20097,589,901'Substrate-guided relays for use with scanned beam light sources'20097,580,189'Optical element that includes a microlens array and related method'20097,495,833'Scanned beam source and systems using a scanned beam source for producing a wavelength-compensated composite beam of light'20097,460,305'Scanned-beam heads-up display and related systems and methods'20087,186,004'Homogenizing optical sheet, method of manufacture, and illumination system'20076,425,669'Maskless exposure system'20026,262,791'Optical element for imaging a flat mask onto a nonplanar substrate'20016,214,110'Apparatus for producing uniform coating thickness on a spherical substrate'20015,949,557'Total internal reflection holography method and apparatus for lithography on 3-D spherical shaped integrated circuit'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999Based in Richland Hills, TX, US· patent location history
2001Based in Allen, TX, US· patent location history
2002–2021Based in Lake Stevens, WA, US· patent location history
2008–2012Patents assigned to MICROVISION INC (16)· patent assignee history
2011–2017Patents assigned to MICROSOFT CORP (10)· patent assignee history
2012–2017Patents assigned to POWELL KARLTON (7)· patent assignee history
2012–2016Patents assigned to POWELL KARLTON D (5)· patent assignee history
2015–2021Patents assigned to MICROSOFT TECHNOLOGY LICENSING LLC (37)· patent assignee history
2018Based in Booney Lake, WA, US· patent location history
2020Based in Redmond, WA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MICROSOFT TECHNOLOGY LICENSING LLC | 37 | 2015–2021 |
| MICROVISION INC | 16 | 2008–2012 |
| MICROSOFT CORP | 10 | 2011–2017 |
| POWELL KARLTONself | 7 | 2012–2017 |
| POWELL KARLTON Dself | 5 | 2012–2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Lake Stevens, Washington, US | 60 | 2002–2021 |
| Allen, Texas, US | 2 | 2001 |
| Redmond, Washington, US | 1 | 2020 |
| Booney Lake, Washington, US | 1 | 2018 |
| Richland Hills, Texas, US | 1 | 1999 |