G02F 1/133602
Direct backlight
Official title: {Direct backlight}
G02F1/133602 (Direct backlight) appears on 9,183 US grants and 11,908 published applications in this corpus.
Search patents in G02F- Granted patents
- 9,183
- Published applications
- 11,908
- Assignees
- 1,490
- Inventors
- 14,100
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 12 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 18 | 0 |
| 1996 | 12 | 0 |
| 1997 | 19 | 0 |
| 1998 | 27 | 0 |
| 1999 | 22 | 0 |
| 2000 | 39 | 0 |
| 2001 | 30 | 28 |
| 2002 | 36 | 84 |
| 2003 | 55 | 91 |
| 2004 | 59 | 162 |
| 2005 | 87 | 323 |
| 2006 | 139 | 554 |
| 2007 | 199 | 636 |
| 2008 | 239 | 678 |
| 2009 | 339 | 743 |
| 2010 | 488 | 703 |
| 2011 | 461 | 528 |
| 2012 | 478 | 497 |
| 2013 | 431 | 538 |
| 2014 | 479 | 487 |
| 2015 | 425 | 518 |
| 2016 | 407 | 417 |
| 2017 | 362 | 404 |
| 2018 | 378 | 585 |
| 2019 | 529 | 680 |
| 2020 | 644 | 606 |
| 2021 | 584 | 627 |
| 2022 | 556 | 499 |
| 2023 | 483 | 458 |
| 2024 | 480 | 485 |
| 2025 | 391 | 350 |
| 2026 | 204 | 227 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G02F 1/133603With leds4,572
- G02F 1/133606Including a specially adapted diffusing, scattering or light controlling members3,546
- G02F 1/133608Including particular frames or supporting means2,194
- G02F 1/133605Including specially adapted reflectors1,856
- G02F 1/133611Including means for improving the brightness uniformity1,206
- G02F 1/133604With lamps1,114
- G02F 1/133612Electrical details1,017
- G02F 1/133609Including means for improving the color mixing423
All 9 subgroupsShow fewer
Recent patents
- Backlight with optical film, illumination device therewith, and display screen6 Oct 2026US 12,754,447 B2siOPTICA GmbH
- Backlight module and method for manufacturing the same, and display device6 Oct 2026US 12,754,449 B2Shanghai Tianma Microelectronics Co., Ltd.
- Optical film, backlight, and display29 Sep 2026US 12,748,245 B23M Innovative Properties Company
- Color liquid crystal displays and display backlights29 Sep 2026US 12,748,253 B2Bridgelux, Inc.
- Light diffusion sheet, back-light unit, liquid crystal display device, information apparatus, and method for manufacturing back-light unit29 Sep 2026US 12,748,329 B2Keiwa Inc.
- Virtual image display apparatus and optical unit8 Oct 2026US 2026/0309987 A1Seiko Epson Corporation
- Display device8 Oct 2026US 2026/0310021 A1Wuhan China Star Optoelectronics Technology Co., Ltd.
- Display assemblies with closed airflow pathways8 Oct 2026US 2026/0310022 A1Manufacturing Resources International, Inc.
- Display backlight including optical film having a transmission peak wavelength greater than an emission peak wavelength of the backlight8 Oct 2026US 2026/0310023 A13M Innovative Properties Company
- Backlight module and display apparatus8 Oct 2026US 2026/0310024 A1BOE MLED Technology Co., Ltd.
Most cited
By later US patents
- Plane light source and LCD backlight unit having the same491US 7,940,350 B2Samsung LED Co., Ltd. · 2011
- Uniform illumination system488US 7,072,096 B2Digital Optics International Corporation · 2006
- White light emitting device and white light source module using the same488US 7,959,312 B2Samsung LED Co., Ltd. · 2011
- Plane light source and LCD backlight unit having the same484US 8,432,511 B2Samsung Electronics Co., Ltd. · 2013
- High-density illumination system467US 6,871,982 B2Digital Optics International Corporation · 2005