H05B 41/3928
For high-pressure lamps
Official title: {for high-pressure lamps, e.g. high-intensity discharge lamps, high-pressure mercury or sodium lamps}
H05B41/3928 (For high-pressure lamps) appears on 112 US grants and 77 published applications in this corpus.
Search patents in H05B- Granted patents
- 112
- Published applications
- 77
- Assignees
- 63
- Inventors
- 222
- Latest grant
- 15 Mar 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 5 | 4 |
| 2003 | 5 | 2 |
| 2004 | 4 | 6 |
| 2005 | 3 | 8 |
| 2006 | 6 | 10 |
| 2007 | 4 | 5 |
| 2008 | 8 | 4 |
| 2009 | 3 | 6 |
| 2010 | 3 | 11 |
| 2011 | 8 | 1 |
| 2012 | 7 | 1 |
| 2013 | 2 | 8 |
| 2014 | 2 | 1 |
| 2015 | 2 | 4 |
| 2016 | 4 | 1 |
| 2017 | 2 | 1 |
| 2018 | 2 | 1 |
| 2019 | 0 | 2 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Control method and control circuit of electronic ballast of gas discharge lamp (HID)15 Mar 2022US 11,277,891 B2Shenzhen Number Energy Saving Corporation
- Discharge lamp drive device, light source device, projector, and discharge lamp drive method19 May 2020US 10,660,171 B2Seiko Epson Corporation
- Discharge lamp drive device, light source device, projector, and discharge lamp drive method18 Feb 2020US 10,568,192 B2Seiko Epson Corporation
- Discharge lamp driver, light source apparatus, projector, and discharge lamp driving method10 Jul 2018US 10,018,899 B2Seiko Epson Corporation
- Projection-type image display device20 Feb 2018US 9,900,569 B2Hitachi Maxell, Ltd.
- Control method and control circuit of electronic ballast of gas discharge lamp (hid)1 Jul 2021US 2021/0204372 A1Shenzhen Number Energy Saving Corporation
- Discharge lamp drive device, light source device, projector, and discharge lamp drive method27 Jun 2019US 2019/0199985 A1Seiko Epson Corporation
- Discharge lamp drive device, light source device, projector, and discharge lamp drive method4 Apr 2019US 2019/0104602 A1Seiko Epson Corporation
- Discharge lamp driver, light source apparatus, projector, and discharge lamp driving method1 Feb 2018US 2018/0035522 A1Seiko Epson Corporation
- Projection-type image display device1 Jun 2017US 2017/0155880 A1Hitachi Maxell, Ltd.
Most cited
By later US patents
- SEF Lamp dimming161US 4,219,760 AGeneral Electric Company · 1980
- Fixed frequency, variable duty cycle, square wave dimmer for high intensity gaseous discharge lamp70US 4,170,747 AEsquire, Inc. · 1979
- Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control56US 5,623,187 APhilips Electronics North America Corporation · 1997
- Full-bridge inverter for discharge lamp lighting device with varied transistor zero voltage period38US 5,434,479 AMatsushita Electric Works, Ltd. · 1995
- Apparatus and method for operating a portable xenon arc searchlight36US 6,702,452 B2Xenonics, Inc. · 2004