H05B 45/325
Pulse-width modulation [pwm]
Official title: Pulse-width modulation [PWM]
H05B45/325 (Pulse-width modulation [pwm]) appears on 1,517 US grants and 1,741 published applications in this corpus.
Search patents in H05B- Granted patents
- 1,517
- Published applications
- 1,741
- Assignees
- 722
- Inventors
- 2,732
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 16 |
| 2003 | 6 | 11 |
| 2004 | 5 | 15 |
| 2005 | 4 | 28 |
| 2006 | 22 | 32 |
| 2007 | 19 | 25 |
| 2008 | 20 | 39 |
| 2009 | 19 | 35 |
| 2010 | 18 | 51 |
| 2011 | 21 | 35 |
| 2012 | 59 | 69 |
| 2013 | 58 | 89 |
| 2014 | 67 | 93 |
| 2015 | 81 | 71 |
| 2016 | 70 | 72 |
| 2017 | 107 | 98 |
| 2018 | 94 | 72 |
| 2019 | 99 | 90 |
| 2020 | 74 | 122 |
| 2021 | 106 | 115 |
| 2022 | 128 | 120 |
| 2023 | 102 | 122 |
| 2024 | 109 | 123 |
| 2025 | 110 | 104 |
| 2026 | 102 | 93 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Micro LED pixel circuit driven by PWM6 Oct 2026US 12,757,303 B2Seoul National University R&Db Foundation
- Four wire-to-two wire lamp control signal transmission system and method6 Oct 2026US 12,757,307 B2Guangzhou Rising Dragon Recreation Industrial Co., Ltd.
- Photon source for promoting the growth and maturation rate of members of the plantae and protista kingdoms29 Sep 2026US 12,745,716 B2Agnuity, Inc.
- Automotive modules and methods for controlling thereof22 Sep 2026US 12,742,535 B2ams-OSRAM International GmbH
- Control and monitoring circuitry for illuminated interface22 Sep 2026US 12,745,332 B2Tesla, Inc.
- Circuit for driving a led string8 Oct 2026US 2026/0313769 A1ams-OSRAM International GmbH
- A backlight unit, a vehicle display apparatus and a method of controlling the same1 Oct 2026US 2026/0301700 A1AUMOVIO Germany GmbH
- LED Having a Cup-in-Cup Structure for Achieving Dual Color Temperature17 Sep 2026US 2026/0282636 A1Hangzhou Yun Led Chip Photoelectricity Tech. Co., Ltd.
- Brightness control method of light-emitting device and light-emitting module10 Sep 2026US 2026/0271146 A1Wuxi Indie Microelectronics Ltd.
- New type of phase-cut dimming power supply10 Sep 2026US 2026/0271147 A1Zhuhai Demi Technology Co., Ltd.
Most cited
By later US patents
- Multicolored LED lighting method and apparatus1,174US 6,016,038 AColor Kinetics Incorporated · 2000
- Universal lighting network methods and systems1,007US 6,548,967 B1Color Kinetics Incorporated · 2003
- Lighting entertainment system987US 6,166,496 AColor Kinetics Incorporated · 2000
- Multicolored LED lighting method and apparatus852US 6,150,774 AColor Kinetics Incorporated · 2000
- Smart light bulb852US 6,528,954 B1Color Kinetics Incorporated · 2003