H05B 44/00
Circuit arrangements for operating electroluminescent light sources
Official title: Circuit arrangements for operating electroluminescent light sources (for operating light emitting diodes H05B45/00)
H05B44/00 (Circuit arrangements for operating electroluminescent light sources) appears on 469 US grants and 387 published applications in this corpus.
Search patents in H05B- Granted patents
- 469
- Published applications
- 387
- Assignees
- 237
- Inventors
- 823
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 12 | 0 |
| 1995 | 8 | 0 |
| 1996 | 17 | 0 |
| 1997 | 6 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 14 | 0 |
| 2001 | 10 | 1 |
| 2002 | 10 | 13 |
| 2003 | 11 | 14 |
| 2004 | 8 | 10 |
| 2005 | 4 | 13 |
| 2006 | 10 | 7 |
| 2007 | 11 | 19 |
| 2008 | 3 | 15 |
| 2009 | 7 | 10 |
| 2010 | 10 | 7 |
| 2011 | 9 | 13 |
| 2012 | 7 | 9 |
| 2013 | 17 | 31 |
| 2014 | 26 | 47 |
| 2015 | 21 | 24 |
| 2016 | 35 | 28 |
| 2017 | 28 | 20 |
| 2018 | 18 | 18 |
| 2019 | 17 | 17 |
| 2020 | 21 | 26 |
| 2021 | 19 | 12 |
| 2022 | 12 | 9 |
| 2023 | 13 | 9 |
| 2024 | 8 | 6 |
| 2025 | 6 | 5 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light-emitting electrochemical cell, security element, security system, method of operation and method of production23 Jun 2026US 12,666,787 B2Lumifoil AB
- Device and method for synchronized light and sound emissions24 Feb 2026US 12,563,648 B2Agency for Science, Technology and Research
- Light-emitting metal-oxide-semiconductor devices and associated systems, devices, and methods24 Feb 2026US 12,563,864 B2Micron Technology, Inc.
- Light-emitting device and camera3 Feb 2026US 12,541,139 B2Semiconductor Energy Laboratory Co.Ltd.
- Load control device for a light-emitting diode light source14 Oct 2025US 12,446,131 B2Lutron Technology Company LLC
- Display device20 Aug 2026US 2026/0245511 A1Sony Group Corporation
- Diamond semiconductor device6 Aug 2026US 2026/0231493 A1National Institute of Advanced Industrial Science and Technology
- Forward converter having a primary-side current sense circuit12 Feb 2026US 2026/0045882 A1Lutron Technology Company LLC
- Load control device for a light-emitting diode light source5 Feb 2026US 2026/0040417 A1Lutron Technology Company LLC
- Display device and electronic device18 Dec 2025US 2025/0384804 A1Sony Semiconductor Solutions Corporation
Most cited
By later US patents
- Pixel circuit display apparatus and electronic apparatus equipped with current driving type light-emitting device316US 6,518,962 B2Seiko Epson Corporation · 2003
- Current-driven light-emitting display apparatus and method of producing the same175US 6,462,722 B1Seiko Epson Corporation · 2002
- Open loop brightness control for EL lamp169US 5,493,183 ADurel Corporation · 1996
- Power supply for illuminating an electro-luminescent panel150US 6,304,039 B1E-Lite Technologies, Inc. · 2001
- Photo-feedback drive system147US 5,089,748 ADelco Electronics Corporation · 1992