G02F 1/13363
Birefringent elements
Official title: Birefringent elements, e.g. for optical compensation
G02F1/13363 (Birefringent elements) appears on 3,668 US grants and 4,172 published applications in this corpus.
Search patents in G02F- Granted patents
- 3,668
- Published applications
- 4,172
- Assignees
- 630
- Inventors
- 5,296
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 7 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 31 | 0 |
| 1993 | 31 | 0 |
| 1994 | 22 | 0 |
| 1995 | 24 | 0 |
| 1996 | 59 | 0 |
| 1997 | 34 | 0 |
| 1998 | 63 | 0 |
| 1999 | 47 | 0 |
| 2000 | 85 | 0 |
| 2001 | 62 | 25 |
| 2002 | 58 | 85 |
| 2003 | 86 | 95 |
| 2004 | 85 | 152 |
| 2005 | 83 | 181 |
| 2006 | 114 | 236 |
| 2007 | 88 | 209 |
| 2008 | 117 | 210 |
| 2009 | 137 | 265 |
| 2010 | 169 | 225 |
| 2011 | 173 | 148 |
| 2012 | 187 | 173 |
| 2013 | 119 | 146 |
| 2014 | 125 | 158 |
| 2015 | 152 | 196 |
| 2016 | 118 | 175 |
| 2017 | 146 | 160 |
| 2018 | 141 | 156 |
| 2019 | 151 | 202 |
| 2020 | 159 | 184 |
| 2021 | 152 | 198 |
| 2022 | 168 | 147 |
| 2023 | 131 | 151 |
| 2024 | 141 | 139 |
| 2025 | 102 | 96 |
| 2026 | 49 | 60 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G02F 1/133638Waveplates, i.e. plates with a retardation value of lambda/n1,176
- G02F 1/133634The refractive index nz perpendicular to the element surface being different from941
- G02F 1/133631With a spatial distribution of the retardation value350
- G02F 1/133633Using mesogenic materials309
- G02F 1/133632With refractive index ellipsoid inclined relative to the lc-layer surface246
- G02F 1/133637Characterised by the wavelength dispersion221
- G02F 1/133636With twisted orientation147
- G02F 1/133635Multifunctional compensators137
Recent patents
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- Display device24 Sep 2026US 2026/0287920 A1Innolux Corporation
- Electronic device and operation method thereof10 Sep 2026US 2026/0267147 A1Semiconductor Energy Laboratory Co.Ltd.
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Most cited
By later US patents
- Liquid crystal display in which at least one pixel includes both a transmissive region and a reflective region320US 6,195,140 B1Sharp Kabushiki Kaisha · 2001
- High efficiency polarized display298US 5,751,388 AHoneywell Inc. · 1998
- Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization269US 5,929,946 AColorLink, Inc. · 1999
- Chiral smectic liquid crystal optical modulators having variable retardation259US 5,381,253 ABoard of Regents of the University of Colorado · 1995
- Liquid crystal cell using the electrically controlled birefringence effect and a uniaxial medium of negative optical anisotropy usable therein248US 4,889,412 ACommissariat A L' Energie Atomique · 1989