H04N 23/71
Circuitry for evaluating the brightness variation
H04N23/71 (Circuitry for evaluating the brightness variation) appears on 3,535 US grants and 4,065 published applications in this corpus.
Search patents in H04N- Granted patents
- 3,535
- Published applications
- 4,065
- Assignees
- 969
- Inventors
- 6,554
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 15 | 0 |
| 1992 | 7 | 0 |
| 1993 | 15 | 0 |
| 1994 | 14 | 0 |
| 1995 | 12 | 0 |
| 1996 | 14 | 0 |
| 1997 | 7 | 0 |
| 1998 | 13 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 9 |
| 2002 | 14 | 29 |
| 2003 | 18 | 45 |
| 2004 | 21 | 42 |
| 2005 | 27 | 52 |
| 2006 | 33 | 45 |
| 2007 | 30 | 88 |
| 2008 | 40 | 68 |
| 2009 | 57 | 100 |
| 2010 | 73 | 90 |
| 2011 | 81 | 84 |
| 2012 | 91 | 81 |
| 2013 | 74 | 102 |
| 2014 | 113 | 109 |
| 2015 | 105 | 154 |
| 2016 | 138 | 190 |
| 2017 | 188 | 277 |
| 2018 | 190 | 248 |
| 2019 | 261 | 285 |
| 2020 | 294 | 363 |
| 2021 | 295 | 309 |
| 2022 | 313 | 308 |
| 2023 | 236 | 299 |
| 2024 | 250 | 269 |
| 2025 | 257 | 230 |
| 2026 | 173 | 189 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ophthalmic observation apparatus6 Oct 2026US 12,751,618 B2Topcon Corporation
- Vision inspection apparatus and vision inspection method6 Oct 2026US 12,755,365 B2
- Methods and systems for enhancing low light frame in a multi camera system6 Oct 2026US 12,756,927 B2Samsung Electronics Co., Ltd.
- Modification method of image brightness of photographing system6 Oct 2026US 12,756,936 B2Alpha Networks Inc.
- Photographing based on a target exposure parameter6 Oct 2026US 12,756,937 B2Honor Device Co., Ltd.
- Signal processing device and signal processing method8 Oct 2026US 2026/0311481 A1Sony Semiconductor Solutions Corporation
- Learning-Based Camera Autofocus Prediction for Sparse Phase Detection Imaging Sensors8 Oct 2026US 2026/0313231 A1Google Inc.
- Systems and methods for illumination and imaging of a target8 Oct 2026US 2026/0313238 A1Stryker Corporation
- Detecting Optical Discrepancies In Captured Images1 Oct 2026US 2026/0301186 A1Skydio, Inc.
- Camera system1 Oct 2026US 2026/0303935 A1Otos Wing Co., Ltd.
Most cited
By later US patents
- Communication apparatus image processing apparatus communication method and image processing method540US 6,266,082 B1Canon Kabushiki Kaisha · 2001
- Capturing and rendering high dynamic range images344US 8,760,537 B2Apple Inc. · 2014
- Automatic exposure control device using plural image plane detection areas280US 5,339,163 ACanon Kabushiki Kaisha · 1994
- Solid-state image sensor with exposure controller229US 4,471,228 AFuji Photo Film Co., Ltd. · 1984
- Digital cameras with direct luminance and chrominance detection208US 7,964,835 B2Protarius Filo AG, L.L.C. · 2011