B41J 2/04501
Control methods or devices therefor
Official title: {Control methods or devices therefor, e.g. driver circuits, control circuits}
B41J2/04501 (Control methods or devices therefor) appears on 7,944 US grants and 8,187 published applications in this corpus.
Search patents in B41J- Granted patents
- 7,944
- Published applications
- 8,187
- Assignees
- 537
- Inventors
- 7,105
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 9 | 0 |
| 1982 | 12 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 16 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 11 | 0 |
| 1991 | 9 | 0 |
| 1992 | 29 | 0 |
| 1993 | 16 | 0 |
| 1994 | 26 | 0 |
| 1995 | 32 | 0 |
| 1996 | 52 | 0 |
| 1997 | 53 | 0 |
| 1998 | 93 | 0 |
| 1999 | 86 | 0 |
| 2000 | 135 | 0 |
| 2001 | 185 | 49 |
| 2002 | 229 | 172 |
| 2003 | 197 | 172 |
| 2004 | 179 | 316 |
| 2005 | 161 | 387 |
| 2006 | 210 | 304 |
| 2007 | 239 | 279 |
| 2008 | 265 | 327 |
| 2009 | 248 | 337 |
| 2010 | 316 | 273 |
| 2011 | 275 | 185 |
| 2012 | 203 | 183 |
| 2013 | 186 | 223 |
| 2014 | 281 | 242 |
| 2015 | 341 | 316 |
| 2016 | 323 | 304 |
| 2017 | 309 | 469 |
| 2018 | 365 | 472 |
| 2019 | 448 | 451 |
| 2020 | 435 | 467 |
| 2021 | 368 | 494 |
| 2022 | 370 | 413 |
| 2023 | 327 | 392 |
| 2024 | 345 | 380 |
| 2025 | 285 | 304 |
| 2026 | 225 | 276 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B41J 2/04581Controlling heads based on piezoelectric elements3,142
- B41J 2/04541Specific driving circuit2,861
- B41J 2/0458Controlling heads based on heating elements forming bubbles2,648
- B41J 2/04588Using a specific waveform2,493
- B41J 2/04586Controlling heads of a type not covered by groups b41j2/04575 - b41j2/045851,584
- B41J 2/04563Detecting head temperature1,524
- B41J 2/04543Block driving1,332
- B41J 2/04596Non-ejecting pulses1,189
All 58 subgroupsShow fewer
- B41J 2/04573Timing1,104
- B41J 2/0451For detecting failure1,052
- B41J 2/04591Width of the driving signal being adjusted1,048
- B41J 2/04593Dot-size modulation by changing the size of the drop1,001
- B41J 2/04528Aiming at warming up the head764
- B41J 2/04505Aiming at correcting alignment653
- B41J 2/04508Aiming at correcting other parameters591
- B41J 2/04551Using several operating modes564
- B41J 2/0457Power supply level being detected or varied553
- B41J 2/04553Detecting ambient temperature526
- B41J 2/04585Controlling heads based on thermal bent actuators490
- B41J 2/0459Height of the driving signal being adjusted465
- B41J 2/0452Reducing demand in current or voltage429
- B41J 2/04598Pre-pulse380
- B41J 2/0455Details of switching sections of circuit376
- B41J 2/04595Dot-size modulation by changing the number of drops per dot308
- B41J 2/04548Details of power line section of control circuit305
- B41J 2/04555Detecting current292
- B41J 2/04571Detecting viscosity267
- B41J 2/0456Detecting drop size, volume or weight237
- B41J 2/04506Aiming at correcting manufacturing tolerances229
- B41J 2/04565Detecting heater resistance223
- B41J 2/04536Using history data220
- B41J 2/04518Reducing costs212
- B41J 2/04516Preventing formation of satellite drops205
- B41J 2/04558Detecting presence or properties of a dot on paper190
- B41J 2/04561Detecting presence or properties of a drop in flight164
- B41J 2/0454Involving calculation of temperature163
- B41J 2/04525Reducing occurrence of cross talk156
- B41J 2/04546Multiplexing154
- B41J 2/04515Preventing overheating141
- B41J 2/04526Controlling trajectory128
- B41J 2/04556Detecting distance to paper119
- B41J 2/04568Control according to number of actuators used simultaneously116
- B41J 2/04533Controlling a head having several actuators per chamber110
- B41J 2/04566Detecting humidity103
- B41J 2/04503Aiming at compensating carriage speed101
- B41J 2/04521Reducing number of signal lines needed91
- B41J 2/04513For increasing lifetime89
- B41J 2/04535Involving calculation of drop size, weight or volume89
- B41J 2/04578Controlling heads based on electrostatically-actuated membranes85
- B41J 2/04545Dynamic block driving70
- B41J 2/04511For electrostatic discharge protection50
- B41J 2/04576Controlling heads of electrostatic type46
- B41J 2/04575Controlling heads of acoustic type44
- B41J 2/04523Reducing size of the apparatus40
- B41J 2/04531Controlling a head having a heater in the manifold40
- B41J 2/04538Involving calculation of heater resistance18
- B41J 2/04583Controlling heads based on discharge by lowering the surface tension of meniscus17
- B41J 2/0453Controlling a head having a dummy chamber15
Recent patents
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- Liquid discharge apparatus and liquid discharge method6 Oct 2026US 12,752,536 B2Ricoh Company, Ltd.
- Piezoelectric element, method for manufacturing piezoelectric element, and liquid ejection head6 Oct 2026US 12,757,636 B2Canon Kabushiki Kaisha
- Drive waveform generator, liquid discharge head, liquid discharge apparatus, manufacturing apparatus for display devices, and method of manufacturing display devices8 Oct 2026US 2026/0307382 A1
- Liquid discharge head substrate, liquid discharge head, and liquid discharge apparatus8 Oct 2026US 2026/0307383 A1Canon Kabushiki Kaisha
- Printing device and method for controlling the same8 Oct 2026US 2026/0307384 A1Samsung Display Co., Ltd.
- Printing apparatus, control method, and storage medium8 Oct 2026US 2026/0307385 A1Canon Kabushiki Kaisha
- Drive waveform generator, liquid discharge head, and liquid discharge apparatus8 Oct 2026US 2026/0307386 A1
Most cited
By later US patents
- Bubble jet recording method and apparatus in which a heating element generates bubbles in a liquid flow path to project droplets2,047US 4,723,129 ACanon Kabushiki Kaisha · 1988
- Droplet generating method and apparatus thereof1,847US 4,463,359 ACanon Kabushiki Kaisha · 1984
- Bubble jet recording method and apparatus in which a heating element generates bubbles in multiple liquid flow paths to project droplets1,733US 4,740,796 ACanon Kabushiki Kaisha · 1988
- Ink jet recording method1,590US 4,345,262 ACanon Kabushiki Kaisha · 1982
- Liquid jet recording process and liquid jet recording head1,557US 4,313,124 ACanon Kabushiki Kaisha · 1982