Claims
- 1. An ink jet recording apparatus for recording with an ink jet recording head having a plurality of discharge ports for discharging ink and discharge means provided corresponding to each of the discharge ports to cause the ink to discharge through a corresponding discharge port in response to application of drive signals, said apparatus effecting recording by discharging the ink onto a recording medium from the ink jet recording head, said apparatus comprising:
- pulse control means for controlling a driving signal to be applied to the discharge means and changing an amount of an ink droplet discharged from the discharge port corresponding to the discharge means, said pulse control means for individually changing the amount of the ink droplet discharged from each of the plurality of discharge ports; and
- discharge amount control means for changing at random a driving signal applied to each of the plurality of discharge means by said pulse control means in accordance with image data to be recorded and driving the plurality of discharge means, said discharge amount control means controlling so as to change at random the amount of the ink droplet discharged from each of the plurality of discharge ports,
- wherein said discharge amount control means differentiates an amount of variation in the discharge amount in accordance with a frequency of discharge represented by the image data.
- 2. An ink jet recording apparatus according to claim 1, wherein said discharge amount control means makes an amount of variation in the discharge amount greater as the frequency of discharge represented by the image data becomes higher.
- 3. An ink jet recording apparatus according to claim 1, wherein said pulse control means varies a pulse width of the drive signal.
- 4. An ink jet recording apparatus according to claim 1, wherein said pulse control means varies a voltage value of the drive signal.
- 5. An ink jet recording apparatus according to claim 1, wherein the discharge means generates heat energy to effect a change of state of ink in the discharge ports, the change of state creating a bubble and causing the ink to be displaced and discharged from the discharge ports.
- 6. An ink jet recording apparatus according to claim 1, wherein the discharge means comprises piezoelectric elements which transduce the drive signals to generate pressure in ink in the discharge ports, the pressure displacing the ink and causing the ink to be discharged from the discharge ports.
- 7. An ink jet recording apparatus according to claim 1, wherein said discharge amount control means differentiates at random the discharge amount only in a case the frequency of discharge represented by the image data is high.
- 8. An ink jet recording apparatus according to claim 1, wherein each of the drive signals comprises a first pulse for discharging ink, and a second pulse, and energy of the second pulse is smaller than that of the first pulse.
- 9. An ink jet recording apparatus according to claim 8, wherein said pulse control means varies a time interval between applications of the first pulse and the second pulse.
- 10. An ink jet recording apparatus according to claim 8, wherein the discharge means comprises piezoelectric elements which transduce the drive pulses to generate pressure in ink in the discharge ports, the pressure displacing the ink and causing the ink to be discharged from the discharge ports.
- 11. An ink jet recording apparatus according to claim 7, wherein the discharge means generates heat energy to effect a change of state of ink in the discharge ports, the change of state creating a bubble and causing the ink to be displaced and discharged from the discharge ports.
- 12. An ink jet recording apparatus according to claim 8, wherein only the second pulse is applied when recording is not to be effected.
- 13. An ink jet recording apparatus according to claim 8, wherein only the second pulse is applied to the discharge means corresponding to the discharge ports which are not intended to discharge among the plurality of discharge ports.
- 14. An ink jet recording apparatus according to claim 8, wherein said pulse control means varies a waveform of the second pulse.
- 15. An ink jet recording apparatus according to claim 14, wherein said pulse control means varies a pulse width of the second pulse.
- 16. An ink jet recording apparatus according to claim 14, wherein said pulse control means varies a voltage value of the second pulse.
- 17. An ink jet recording apparatus for recording with an ink jet recording head having a plurality of discharge ports for discharging ink and discharge means provided corresponding to each of the discharge ports to cause the ink to discharge through a corresponding discharge port in response to application of drive signals, said apparatus effecting recording by discharging the ink onto a recording medium from the ink jet recording head, said apparatus comprising:
- pulse control means for controlling a driving signal to be applied to the discharge means and changing an amount of an ink droplet discharged from the discharge port corresponding to the discharge means, the driving signal comprising a first pulse for discharging ink and a second pulse having an energy smaller than that of the first pulse and being applied to the discharge means prior to the first pulse, said pulse control means for individually changing the amount of the ink droplet discharged from each of the plurality of discharge ports; and
- discharge amount control means for changing at random a driving signal applied to each of the plurality of discharge means by said pulse control means in accordance with image data to be recorded and driving the plurality of discharge means, said discharge amount control means controlling so as to change at random the amount of the ink droplet discharged from each of the plurality of discharge ports,
- wherein said discharge amount control means differentiates an amount of variation in the discharge amount in accordance with a frequency of discharge represented by the image data.
- 18. An ink jet recording apparatus according to claim 17, wherein said pulse control means varies a voltage value of the second pulse.
- 19. An ink jet recording apparatus according to claim 17, wherein only the second pulse is applied when recording is not to be effected.
- 20. An ink jet recording apparatus according to claim 17, wherein only the second pulse is applied to the discharge means corresponding to the discharge ports which are not intended to discharge among the plurality of discharge ports.
- 21. An ink jet recording apparatus according to claim 17, wherein said discharge amount control means makes the amount of variation in the discharge amount greater as the frequency of discharge represented by the image data becomes higher.
- 22. An ink jet recording apparatus according to claim 17, wherein said discharge amount control means differentiates at random the discharge amount in only a case the frequency of discharge represented by the image data is high.
- 23. An ink jet recording apparatus according to claim 17, wherein said pulse control means varies a pulse width of the second pulse.
- 24. An ink jet recording method, for use with an ink jet recording head having a plurality of discharge ports for discharging ink and discharge means provided corresponding to each of the discharge ports to cause the ink to discharge through a corresponding discharge port in response to application of drive pulses, said method effecting recording by discharging the ink onto a recording medium from the ink jet recording head, said method comprising the steps of:
- determining whether or not ink is discharged from each of the plurality of discharge means in accordance with image data to be recorded; and
- controlling to drive the discharge means by changing at random the driving pulse to be applied to the discharge means for discharging ink among the plurality of discharge means and to change an amount of an ink droplet discharged from the plurality of discharge ports,
- wherein the driving pulse is controlled so that an amount of variation in the discharge amount is differentiated in accordance with a frequency of discharge represented by the image data.
- 25. In ink jet recording method according to claim 24, wherein said control step controls the driving pulse so that an amount of variation in the discharge amount is made greater as the frequency of discharge represented by the image data becomes higher.
- 26. An ink jet recording method according to claim 24, wherein said controlling step controls the driving pulse to differentiate at random an amount of variation in the discharge amount only in a case that the frequency of discharge represented by the image data is high.
- 27. An ink jet recording method according to claim 24, wherein a standard deviation of volume distribution of the ink droplets which is varied at random is 9.0% or more.
- 28. An ink jet recording method according to claim 24, wherein the ink droplets are discharged onto a transfer sheet of which a load of a surface sizing agent is within a range of 0.8 to 3.9 weight % of the transfer sheet.
- 29. An ink jet recording method according to claim 24, wherein the ink contains 0.1 to 10 weight % of alkyl alcohol of one to four carbon numbers, or its halogen derivative, and viscosity of the ink is 2.0 cP or more at 25.degree. C.
- 30. An ink jet recording method according to claim 29, wherein
- the ink further contains 0.1 to 10 weight % of hydrogen content heterocyclic compound and/or thiodiglycol.
- 31. An ink jet recording method according to claim 24, wherein the ink contains at least six to 50 weight % of oxyethylene addition polymer and/or triol, and 0.001 to 2 weight % of an interfacial activator.
- 32. An ink jet recording method according to claim 31, wherein
- the ink further contains 0.1 to 15 weight % of alkyl alcohol of one to four carbon numbers or its halogen derivative.
- 33. An ink jet recording method according to claim 24, wherein the ink contains at least six to 50 weight % of oxyethylene addition polymer and/or triol, 0.001 to 2 weight % of an interfacial activator, and 0.1 to 15 weight % of alkyl alcohol of one to four carbon numbers or its halogen derivative.
- 34. An ink jet recording method according to claim 33, wherein the alkyl alcohol is an alkyl alcohol of carbon number one, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 15 weight %.
- 35. An ink jet recording method according to claim 33, wherein a standard deviation of volume distribution of the ink droplets which is varied at random is 9.0% or more.
- 36. An ink jet recording method according to claim 33, wherein the alkyl alcohol is an alkyl alcohol of carbon number two, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 10 weight %.
- 37. An ink jet recording method according to claim 26, wherein the alkyl alcohol is an alkyl alcohol of carbon number three, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 5 weight %.
- 38. An ink jet recording method according to claim 33, wherein the alkyl alcohol is an alkyl alcohol of carbon number four, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 3 weight %.
- 39. An ink jet recording method, for use with an ink jet recording head having a plurality of discharge ports for discharging ink and discharge means provided corresponding to each of the discharge ports to cause ink to discharge through a corresponding discharge port in response to application of drive pulses, said method effecting recording by discharging the ink onto a recording medium from the ink jet recording head, said method comprising the steps of:
- providing the ink containing at least 4 to 50 weight % of oxyethylene addition polymer and/or triol, with viscosity of the ink being 3.0 cP or less at 25.degree. C. and surface tension of the ink being 55 dyne/cm or more;
- determining whether or not the ink is discharged from each of the plurality of discharge ports in accordance with image data to be recorded; and
- controlling to drive the discharge means by changing at random the driving pulse to be applied to the discharge means for discharging ink among the plurality of discharge means and to change an amount of an ink droplet discharged from the plurality of discharge ports,
- wherein the driving pulse is controlled so that an amount of variation in the discharge amount is differentiated in accordance with a frequency of discharge represented by the image data.
- 40. In ink jet recording method according to claim 39, wherein said control step controls the driving pulse so that the amount of variation in the discharge amount is made greater as the frequency of discharge represented by the image data becomes higher.
- 41. An ink jet recording method according to claim 39, wherein said controlling step controls the driving pulse to differentiate at random the amount of variation in the discharge amount only in a case that the frequency of discharge represented by the image data is high.
- 42. An ink jet recording method according to claim 39, further comprising the steps of:
- generating a change of state of the ink by heat in response to applied electrical energy, the change of state causing the ink to be discharged from the discharging ports, and
- controlling discharge of the ink by varying the applied electrical energy at random, such that a volume of ink discharged from the plurality of discharging ports is varied at random per discharge.
- 43. An ink jet recording method according to claim 39, further comprising the step of discharging the ink from the plurality of discharge ports such that volumes of discharged ink vary, wherein a standard deviation of volume distribution of ink droplet diameter which is varied at random is 9.0% or more.
- 44. An ink jet recording method according to claim 39, further comprising the step of discharging the ink onto a transfer sheet for which the load of a surface sizing agent is 0.8 to 3.9 weight % of the transfer sheet.
- 45. An ink jet recording method according to claim 44, wherein the transfer sheet utilized in said discharging step comprises a surface sizing agent in a load ratio such that the transfer sheet can be used in an electronic photographing method.
- 46. An ink jet recording method according to claim 39, wherein said providing step provides the ink containing at least four to 50 weight % of oxyethylene addition polymer and/or triol, and 0.1 to 10 weight % of alkyl alcohol of one to four carbon numbers, or its halogen derivative, and the viscosity of the ink is 2.0 cP or more at 25.degree. C.
- 47. An ink jet recording method according to claim 46, wherein
- the ink further contains 0.1 to 10 weight % of hydrogen content heterocyclic compound and/or thiodiglycol.
- 48. An ink jet recording method according to claim 39, wherein said providing step provides the ink containing at least six to 50 weight % of oxyethylene addition polymer and/or triol, and 0.001 to 2 weight % of an interfacial activator.
- 49. An ink jet recording method according to claim 48, wherein
- the ink further contain 0.1 to 15 weight % of alkyl alcohol of one to four carbon numbers or its halogen derivative.
- 50. An ink jet recording method according to claim 49, wherein the alkyl alcohol is an alkyl alcohol of carbon number one, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 15 weight %.
- 51. An ink jet recording method according to claim 49, wherein the alkyl alcohol is an alkyl alcohol of carbon number two, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 10 weight %.
- 52. An ink jet recording method according to claim 49, wherein the alkyl alcohol is an alkyl alcohol of carbon number three, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 5 weight %.
- 53. An ink jet recording method according to claim 49, wherein the alkyl alcohol is an alkyl alcohol of carbon number four, and the content of the alkyl alcohol or its halogen derivative is 0.1 to 3 weight %.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-173334 |
Jun 1992 |
JPX |
|
4-189401 |
Jul 1992 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/083,433 filed Jun. 29, 1993, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0373894 |
Jun 1990 |
EPX |
59-176055 |
Oct 1984 |
JPX |
3-221459 |
Sep 1991 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
083433 |
Jun 1993 |
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