G03B 21/53
Means for automatic focusing
Official title: Means for automatic focusing, e.g. to compensate thermal effects
G03B21/53 (Means for automatic focusing) appears on 216 US grants and 249 published applications in this corpus.
Search patents in G03B- Granted patents
- 216
- Published applications
- 249
- Assignees
- 122
- Inventors
- 517
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 9 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 2 | 2 |
| 2005 | 1 | 7 |
| 2006 | 2 | 7 |
| 2007 | 6 | 7 |
| 2008 | 1 | 10 |
| 2009 | 2 | 9 |
| 2010 | 5 | 5 |
| 2011 | 10 | 16 |
| 2012 | 5 | 18 |
| 2013 | 11 | 6 |
| 2014 | 6 | 14 |
| 2015 | 18 | 14 |
| 2016 | 13 | 8 |
| 2017 | 12 | 12 |
| 2018 | 9 | 15 |
| 2019 | 13 | 18 |
| 2020 | 18 | 19 |
| 2021 | 13 | 13 |
| 2022 | 14 | 11 |
| 2023 | 9 | 13 |
| 2024 | 7 | 9 |
| 2025 | 4 | 8 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Projection apparatus and projecting method1 Sep 2026US 12,724,338 B2Qisda Corporation
- Display apparatus and home appliance having same14 Jul 2026US 12,678,015 B2Dgt Corporation
- Hybrid lens system for projectors30 Jun 2026US 12,669,746 B1Amazon Technologies, Inc.
- Projection apparatus and auto-focus method12 May 2026US 12,625,346 B2Benq Corporation
- Electronic apparatus and method for controlling thereof21 Apr 2026US 12,610,028 B2Samsung Electronics Co., Ltd.
- Projection apparatus, control method, and control program30 Jul 2026US 2026/0219562 A1FUJIFILM Corporation
- Range-based focus assistance for projection optics16 Jul 2026US 2026/0202730 A1Electronic Theatre Controls, Inc.
- Auto-focus method for projector, projector, and non-transitory computer-readable storage medium9 Jul 2026US 2026/0194802 A1Anker Innovations Technology Co., Ltd.
- Detection method and apparatus18 Jun 2026US 2026/0172532 A1Shenzhen Yinwang Intelligent Technologies Co., Ltd.
- Focusing control method, apparatus, projector, and storage medium23 Apr 2026US 2026/0110956 A1Shenzhen Oceanwing Smart Innovations Technology Co., Ltd
Most cited
By later US patents
- Image display device and adjustment for alignment267US 6,631,994 B2Mitsubishi Denki Kabushiki Kaisha · 2003
- Image projection system with autofocusing64US 5,400,093 AU. S. Philips Corporation · 1995
- Apparatus and method for focusing a projected image45US 6,050,690 ASiemens Information and Communication Networks, Inc. · 2000
- Projection type display apparatus39US 7,303,289 B2Canon Kabushiki Kaisha · 2007
- Distance measuring system and projector37US 7,889,324 B2Casio Computer Co., Ltd. · 2011