H04N 1/02885
Means for compensating spatially uneven illumination
Official title: {Means for compensating spatially uneven illumination, e.g. an aperture arrangement}
H04N1/02885 (Means for compensating spatially uneven illumination) appears on 330 US grants and 297 published applications in this corpus.
Search patents in H04N- Granted patents
- 330
- Published applications
- 297
- Assignees
- 114
- Inventors
- 554
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 6 |
| 2002 | 12 | 10 |
| 2003 | 15 | 11 |
| 2004 | 7 | 13 |
| 2005 | 8 | 15 |
| 2006 | 10 | 8 |
| 2007 | 3 | 6 |
| 2008 | 3 | 13 |
| 2009 | 9 | 31 |
| 2010 | 11 | 20 |
| 2011 | 11 | 24 |
| 2012 | 20 | 9 |
| 2013 | 22 | 12 |
| 2014 | 23 | 10 |
| 2015 | 15 | 18 |
| 2016 | 20 | 14 |
| 2017 | 9 | 11 |
| 2018 | 15 | 16 |
| 2019 | 12 | 12 |
| 2020 | 8 | 7 |
| 2021 | 7 | 6 |
| 2022 | 3 | 5 |
| 2023 | 5 | 7 |
| 2024 | 6 | 5 |
| 2025 | 2 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical device, image reading unit, and image forming apparatus correcting a width of a slit for reflected light29 Sep 2026US 12,750,452 B2FUJIFILM Business Innovation Corp.
- Diffusing member, illuminating device, image reading apparatus, and image forming apparatus to improve diffusivity of light with suppressing a decrease of incident light on an illuminated region of an original16 Jun 2026US 12,656,552 B2Canon Kabushiki Kaisha
- Document reader having an optical filter with variable light transmission5 Aug 2025US 12,381,990 B2E-Seek, Inc.
- Image reading device10 Jun 2025US 12,326,556 B1Mitsubishi Electric Corporation
- Reading device, output device, and image forming device1 Oct 2024US 12,108,005 B2FUJIFILM Business Innovation Corp.
- Image reading device and image forming apparatus23 Jul 2026US 2026/0214175 A1
- Reading device, reading method, program, inspection device, and printing system9 Apr 2026US 2026/0097602 A1FUJIFILM Corporation
- Illumination device, image reading device, image forming apparatus, inspection device, and illumination method8 Jan 2026US 2026/0012549 A1Ricoh Company, Ltd.
- Document reader with improved illumination26 Jun 2025US 2025/0211695 A1Veridos GmbH
- Image reading device29 May 2025US 2025/0172801 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Digitizing scanner232US 6,606,171 B1Howtek, Inc. · 2003
- Colored light source providing intensification of initial source illumination139US 5,255,171 A1993
- Led illumination system120US 6,837,605 B2OSRAM Opto Semiconductors GmbH · 2005
- Linear illumination device117US 6,268,600 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Light source arrangement of a scanner110US 5,768,663 A1998