公开(公告)号：JPH03169656A

公开(公告)日：1991-07-23

申请号：JP30939789

申请日：1989-11-30

Applicant: IBM

Inventor： IWAMOTO NAOHISA ,  NAGANO TADASHI ,  SUGITA SHUJI ,  YAMASHITA SUSUMU

IPC: B41J2/51 ,  B41J2/505

Abstract: PURPOSE: To enhance the readability and clearness of a character printed in high speed print mode by providing a print head having at least two print elements arranged in the printing direction, and a print controller receiving a print data designating whether print operation is performed at a print position or not. CONSTITUTION: In normal speed print mode, dot print elements A1 in row A print dots at print operations P1, P3 and P5 while dot print elements in row B print dots at print operations P2, P4 and P6. In high speed print mode, the dot print elements A1 print dots at print operations P1, P5 while the clot print elements B1 print dots at print operations P3, P7. Print results similar to those of conventional technology are obtained by print operation employing a print head 1 having two rows of dots A, B but excellent print quality can be realized in high speed print mode 2 as compared with conventional print quality.

公开(公告)号：DE69019312D1

公开(公告)日：1995-06-14

申请号：DE69019312

申请日：1990-11-22

Applicant: IBM

Inventor： KANEKO SUNHIRUZU ,  NAGANO TADASHI ,  SUGITA SYUHJI ,  YAMASHITA SHIN

IPC: B41J2/51 ,  B41J2/505

Abstract: Print head (1) relatively moved to a print media in a print direction (x) including at least two print elements aligned in said print direction and each of said print elements requires a predetermined time period to perform next print operations, and a print control means (8-11) for receiving print data to perform the print operations at current print position by the other of print elements in response to (a) said print data specifies the print operations at said current print position, (b) the print operations at a preceding print position just before said current print position were made by one of said print elements, (c) said predetermined time period of the other of said print elements has been elapsed, and (d) said print data does not specify the print operations at predetermined print positions just after said current print position.

公开(公告)号：DE69019312T2

公开(公告)日：1996-01-25

申请号：DE69019312

申请日：1990-11-22

Applicant: IBM

Inventor： KANEKO SUNHIRUZU ,  NAGANO TADASHI ,  SUGITA SYUHJI ,  YAMASHITA SHIN

IPC: B41J2/51 ,  B41J2/505

Abstract: Print head (1) relatively moved to a print media in a print direction (x) including at least two print elements aligned in said print direction and each of said print elements requires a predetermined time period to perform next print operations, and a print control means (8-11) for receiving print data to perform the print operations at current print position by the other of print elements in response to (a) said print data specifies the print operations at said current print position, (b) the print operations at a preceding print position just before said current print position were made by one of said print elements, (c) said predetermined time period of the other of said print elements has been elapsed, and (d) said print data does not specify the print operations at predetermined print positions just after said current print position.