EP 0641655 A3 19951122 - Noise prevention in an ink jet printhead.
Title (en)
Noise prevention in an ink jet printhead.
Title (de)
Farbstrahldruckkopf mit Störungsbeseitigung.
Title (fr)
Tête d'impression par jet d'encre antiparasite.
Publication
Application
Priority
JP 21978693 A 19930903
Abstract (en)
[origin: EP0641655A2] The present invention is directed to resolve the noise problem with the ink in an ink jet head without changing the substrate manufacturing process for the ink jet head, that is, increasing the cost on the manufacture, and without needs of disposing a noise countermeasure component on the side of the printer main device, or making the design change for the countermeasure. The present invention is characterized in that to prevent malfunction from arising by the noise, a hysteresis circuit 101 to provide different input data threshold values upon rising and falling is provided on an input portion of the signal for a drive control logic system such as a drive input signal for a shift register 404 and a latch circuit 403 on the same substrate as that of the heating elements 401, the driver 402 and the drive control logic circuit, utilizing a diffusion layer constituting a driver 402. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B41J 2/04541 (2013.01 - EP US); B41J 2/04543 (2013.01 - EP US); B41J 2/04573 (2013.01 - EP US); B41J 2/0458 (2013.01 - EP US)
Citation (search report)
- [X] EP 0103943 A2 19840328 - HEWLETT PACKARD CO [US]
- [A] EP 0461938 A2 19911218 - CANON KK [JP]
- [A] EP 0488806 A2 19920603 - CANON KK [JP]
- [X] PATENT ABSTRACTS OF JAPAN vol. 007, no. 016 (M - 187) 22 January 1983 (1983-01-22)
- [X] PATENT ABSTRACTS OF JAPAN vol. 012, no. 424 (M - 761) 10 November 1988 (1988-11-10)
- [X] REAM, G.L.: "MULTIPLEX DRIVERS FOR A DROP-ON-DEMAND PRINT HEAD", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 25, no. 11a, NEW YORK US, pages 5652 - 5655
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0641655 A2 19950308; EP 0641655 A3 19951122; EP 0641655 B1 19991201; DE 69421862 D1 20000105; DE 69421862 T2 20000504; DE 69432680 D1 20030618; DE 69432680 T2 20040311; EP 0927635 A2 19990707; EP 0927635 A3 19990908; EP 0927635 B1 20030514; JP 3323597 B2 20020909; JP H0768761 A 19950314; US RE44825 E 20140408
DOCDB simple family (application)
EP 94306488 A 19940902; DE 69421862 T 19940902; DE 69432680 T 19940902; EP 99200744 A 19940902; JP 21978693 A 19930903; US 201113312437 A 20111206