G02F 1/1395
Optically compensated birefringence [ocb]- cells or pi- cells
Official title: {Optically compensated birefringence [OCB]- cells or PI- cells}
G02F1/1395 (Optically compensated birefringence [ocb]- cells or pi- cells) appears on 267 US grants and 330 published applications in this corpus.
Search patents in G02F- Granted patents
- 267
- Published applications
- 330
- Assignees
- 106
- Inventors
- 508
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 6 |
| 2002 | 4 | 19 |
| 2003 | 15 | 20 |
| 2004 | 12 | 21 |
| 2005 | 15 | 18 |
| 2006 | 17 | 44 |
| 2007 | 10 | 36 |
| 2008 | 14 | 35 |
| 2009 | 25 | 29 |
| 2010 | 22 | 13 |
| 2011 | 22 | 27 |
| 2012 | 25 | 13 |
| 2013 | 5 | 8 |
| 2014 | 13 | 5 |
| 2015 | 9 | 6 |
| 2016 | 6 | 7 |
| 2017 | 3 | 2 |
| 2018 | 3 | 8 |
| 2019 | 8 | 6 |
| 2020 | 6 | 4 |
| 2021 | 5 | 2 |
| 2022 | 3 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Holographic camera system11 Nov 2025US 12,468,256 B2Electronics and Telecommunications Research Institute
- Broadband and wide viewing angle waveplate having pi-cell24 Jan 2023US 11,561,437 B2Meta Platforms Technologies, LLC
- Stereoscopic 3D system using linear polarization20 Dec 2022US 11,531,212 B2Shenzhen Timewaying Technology Co., Ltd.
- Liquid crystal fourier transform imaging spectrometer1 Nov 2022US 11,490,037 B2Palo Alto Research Center Incorporated
- Method and apparatus for controlling liquid crystal states19 Jul 2022US 11,391,977 B2Oxford University Innovation Limited
- Holographic camera system8 Sep 2022US 2022/0283541 A1Electronics and Telecommunications Research Institute
- Broadband and wide viewing angle waveplate having pi-cell17 Jun 2021US 2021/0181557 A1Facebook Technologies, LLC
- Stereoscopic 3d system using linear polarization27 May 2021US 2021/0157163 A1Shenzhen Timewaying Technology Co., Ltd.
- Liquid crystal cells for polarization rotation15 Oct 2020US 2020/0326547 A1Facebook Technologies, LLC
- Broadband and wide viewing angle waveplate having pi-cell15 Oct 2020US 2020/0326574 A1Facebook Technologies, LLC
Most cited
By later US patents
- Field sequential color display system using optical retardation190US 4,582,396 ATektronix, Inc. · 1986
- Rapid starting, high-speed liquid crystal variable optical retarder152US 4,566,758 ATektronix, Inc. · 1986
- Liquid crystal display device118US 7,623,202 B2Toshiba Matsushita Display Technology Co., Ltd. · 2009
- Polymer-wall LCD having liquid crystal molecules having a plane-symmetrical bend orientation99US 5,668,651 ASharp Kabushiki Kaisha · 1997
- High contrast light shutter system92US 5,187,603 ATektronix, Inc. · 1993