Claims
- 1. A recording method in which ink is ejected by thermal energy produced by a heat generating element of a recording head in response to a drive signal, said method comprising the steps of:controlling an amount of ejection of the ink by a temperature control for the recording head including at least heating of the recording head, when a temperature of the recording head is not higher than a predetermined first temperature; controlling the amount of ejection of the ink by changing a waveform of the drive signal for ejecting ink in accordance with the temperature of the recording head when the temperature of the recording head is higher than the first temperature and not higher than a second temperature; and fixing the waveform of the drive signal when the temperature of the recording head is higher than the second temperature.
- 2. A method according to claim 1, wherein in said step of controlling by waveform changing, the waveform of the drive signal is varied in accordance with the temperature of the recording head.
- 3. A method according to claim 2, wherein the waveform of the drive signal includes an interval and the interval of the driving signal is increased with an increase of the temperature of the recording head.
- 4. A method according to claim 2, wherein the waveform of the drive signal has a width and the width of the waveform is decreased with an increase of the temperature of the recording head.
- 5. A method according to claim 4, wherein the drive signal is in the form of a pulse, and said step of controlling by waveform changing is effected by changing a width of the pulse.
- 6. A method according to claim 4, wherein the thermal energy is sufficient to produce film boiling of the ink.
- 7. A recording method according to claim 1, wherein the driving signal comprises a plurality of pulses.
- 8. A recording method according to claim 7, wherein the pulses comprise a first pulse for applying energy insufficient to eject the ink, and a second pulse sufficient to eject the ink.
- 9. An ink jet recording apparatus wherein recording is effected using a recording head having a heat generating element generating thermal energy for ejecting ink, said apparatus comprising:means for detecting a temperature of the recording head; temperature control means for controlling a temperature of the recording head by heating the recording head; driving signal modulating means for modulating a driving signal to be supplied to the heat generating element to eject the ink; and control means for controlling the amount of the ink ejected from the recording head, said control means effecting a first operation based on an output of said temperature control means when the temperature of the recording head is not higher than a first predetermined temperature, effecting a second operation based on an output of said driving signal modulating means when the temperature of the recording head is higher than the first predetermined temperature and not higher than a second predetermined temperature, and fixing the driving signal at a predetermined waveform when the temperature of the recording head is higher than the second predetermined temperature.
- 10. An apparatus according to claim 9, wherein said control means varies the waveform of the driving signal in the second operation in accordance with the temperature of the recording head.
- 11. An apparats according to claim 10, wherein the waveform of the driving signal includes an interval and the interval of the driving signal is increased with an increase of the temperature of the recording head.
- 12. An apparatus according to claim 10, wherein the waveform of the driving signal has a width and the width of the waveform is decreased with an increase of the temperature of the recording head.
- 13. An apparatus according to claim 12, wherein the driving signal is in the form of a pulse, and the second operation of said control means is effected by changing a width of the pulse.
- 14. An apparatus according to claim 12, wherein the thermal energy is sufficient to produce film boiling of the ink.
- 15. An apparatus according to claim 9, wherein the driving signal comprises a plurality of pulses.
- 16. An apparatus according to claim 15, wherein the pulses comprise a first pulse for applying energy insufficient to eject the ink, and a second pulse sufficient to eject the ink.
- 17. An apparatus according to claim 9, wherein the driving signal includes a first pulse for causing the heat generating element to generate thermal energy insufficient to eject the ink and a second pulse for causing the heat generating element to generate thermal energy sufficient to eject the ink, wherein the second pulse is applied following an interval time after application of the first pulse.
- 18. An apparatus according to claim 17, wherein said driving signal modulating means modulates the waveform of the driving signal by changing a width of the first pulse.
- 19. A method according to claim 1, wherein the drive signal includes a first pulse for causing the heat generating element to generate thermal energy insufficient to eject the ink and a second pulse for causing the heat generating element to generate thermal energy sufficient to eject the ink, wherein the second pulse is applied following an interval time after application of the first pulse.
- 20. A method according to claim 19, wherein the changing of the waveform of the drive signal is effected by changing a width of the first pulse.
- 21. A method of controlling an amount of ejection of ink in an ink jet system wherein the ink is ejected by thermal energy produced by a heat generating element of a recording head in response to a drive signal, said method comprising the steps of:obtaining information relating to a temperature of the recording head; controlling the amount of ejection of the ink by temperature control of the recording head including at least heating of the recording head, when a temperature of the recording head is not higher than a predetermined temperature, wherein when the temperature of the recording head is higher than the predetermined temperature, the amount of ejection of the ink is controlled by changing at least a pulse width of a pulse of the drive signal.
- 22. A method according to claim 21, wherein the temperature control heats the recording head in accordance with the temperature of the recording head, and wherein when the amount of ejection is controlled by changing the pulse width, the pulse width is changed to a width corresponding to the temperature of the recording head.
- 23. A method according to claim 21, wherein the drive signal includes a first pulse for causing the heat generating element to generate thermal energy insufficient to eject the ink and a second pulse for causing the heat generating element to generate thermal energy sufficient to eject the ink, wherein the second pulse is applied following an interval time after application of the first pulse.
- 24. A method according to claim 23, wherein when the amount of ejection is controlled by changing the pulse width, the width of the first pulse is changed to a width corresponding to a temperature of the recording head.
- 25. A method according to claim 21, wherein in said step of controlling by pulse width changing, the pulse width of the pulse of the drive signal is varied in accordance with the temperature of the recording head.
- 26. A method according to claim 21, wherein the drive signal includes an interval and the interval of the drive signal is increased with an increase of the temperature of the recording head.
- 27. A method according to claim 21, wherein the pulse width is decreased with an increase of the temperature of the recording head.
- 28. A method according to claim 21, wherein the thermal energy is sufficient to produce film boiling of the ink.
- 29. A method according to claim 21, wherein the drive signal comprises a plurality of pulses.
- 30. An ink jet recording apparatus wherein recording is effected using a recording head having a heat generating element generating thermal energy for ejecting ink, said apparatus comprising:means for obtaining information relating to temperature of the recording head; temperature control means for controlling a temperature of the recording head by heating the recording head; pulse modulating means for modulating at least a pulse width of a pulse of a drive signal supplied to the heat generating element; and control means for controlling an amount of the ink ejected from the recording head, said control means effecting a controlling operation using said temperature control means when the temperature of the recording head is not higher than a predetermined temperature, and when the temperature of the recording head is higher than a predetermined temperature, said control means effects the controlling operation using said pulse modulating means.
- 31. An apparatus according to claim 30, wherein said temperature control means controls heating of the recording head based on the temperature of the recording head, and said pulse modulating means drives the heat generating element of the recording head using the pulse having a width corresponding to the temperature of the recording head.
- 32. An apparatus according to claim 30, wherein the drive signal includes a first pulse for causing the heat generating element to generate thermal energy insufficient to eject the ink and a second pulse for causing the heat generating element to generate thermal energy sufficient to eject the ink, wherein the second pulse is applied following an interval time after application of the first pulse.
- 33. An apparatus according to claim 32, wherein said pulse modulating means modulates a width of the first pulse.
- 34. An apparatus according to claim 30, wherein said control means varies the width of the pulse of the drive signal in accordance with the temperature of the recording head.
- 35. An apparatus according to claim 30, wherein the drive signal includes an interval and the interval of the drive signal is increased with an increase of the temperature of the recording head.
- 36. An apparatus according to claim 30, wherein the width of the pulse of the drive signal is decreased with an increase of the temperature of the recording head.
- 37. An apparatus according to claim 30, wherein the thermal energy is sufficient to produce film boiling of the ink.
- 38. An apparatus according to claim 30, wherein the drive signal comprises a plurality of pulses.
Priority Claims (6)
Number |
Date |
Country |
Kind |
3-004390 |
Jan 1991 |
JP |
|
3-004392 |
Jan 1991 |
JP |
|
3-004713 |
Jan 1991 |
JP |
|
3-004742 |
Jan 1991 |
JP |
|
4-003228 |
Jan 1992 |
JP |
|
3-255192 |
Oct 1992 |
JP |
|
Parent Case Info
This application is a divisional of U.S. patent application Ser. No. 08/486,296, filed Jun. 7, 1995, now U.S. Pat. No. 5,861,895, which is a divisional of U.S. patent application Ser. No. 08/104,261, filed May 17, 1993, which is a continuation of U.S. application Ser. No. 07/821,773, filed Jan 16, 1992, abandoned.
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Continuations (1)
|
Number |
Date |
Country |
Parent |
07/821773 |
Jan 1992 |
US |
Child |
08/104261 |
|
US |