H04N 9/317
Convergence or focusing systems
Official title: {Convergence or focusing systems (electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53)}
H04N9/317 (Convergence or focusing systems) appears on 653 US grants and 723 published applications in this corpus.
Search patents in H04N- Granted patents
- 653
- Published applications
- 723
- Assignees
- 245
- Inventors
- 1,311
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 1 |
| 2002 | 9 | 10 |
| 2003 | 15 | 17 |
| 2004 | 11 | 27 |
| 2005 | 14 | 41 |
| 2006 | 21 | 30 |
| 2007 | 22 | 35 |
| 2008 | 24 | 16 |
| 2009 | 16 | 8 |
| 2010 | 14 | 17 |
| 2011 | 14 | 21 |
| 2012 | 16 | 20 |
| 2013 | 11 | 10 |
| 2014 | 20 | 21 |
| 2015 | 21 | 23 |
| 2016 | 21 | 54 |
| 2017 | 34 | 27 |
| 2018 | 36 | 50 |
| 2019 | 41 | 34 |
| 2020 | 46 | 48 |
| 2021 | 32 | 45 |
| 2022 | 47 | 44 |
| 2023 | 28 | 37 |
| 2024 | 29 | 31 |
| 2025 | 25 | 28 |
| 2026 | 21 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Control method for projection apparatus, projection system, and non-transitory computer-readable storage medium storing program8 Oct 2026US 2026/0313081 A1Seiko Epson Corporation
- Method of controlling optical system1 Oct 2026US 2026/0303762 A1Seiko Epson Corporation
- Focusing device and projection device1 Oct 2026US 2026/0303763 A1Anker Innovations Technology Co., Ltd.
- Projection device and display system24 Sep 2026US 2026/0292112 A1Beijing Boe Display Technology Co., Ltd.
Most cited
By later US patents
- Variable intensity high contrast passive display504US 5,717,422 A1998
- Image display device and adjustment for alignment267US 6,631,994 B2Mitsubishi Denki Kabushiki Kaisha · 2003
- Electro-optical device, and projector and electronic apparatus including the same102US 7,616,270 B2Seiko Epson Corporation · 2009
- Projector comprising a microcomputer for controlling zoom and focus adjustments utilizing pattern generation and calculation means94US 6,592,228 B1Matsushita Electric Industrial Co., Ltd. · 2003
- High efficiency electromagnetic beam projector and systems and method for implementation thereof79US 5,903,388 A1999