公开(公告)号：JPH02202618A

公开(公告)日：1990-08-10

申请号：JP2087389

申请日：1989-02-01

Applicant: IBM JAPAN

Inventor： FURUTA MINORU ,  FURUYA MANABU

IPC: G06F3/041 ,  G06F3/033 ,  G06F3/037 ,  G06F3/038 ,  G06F3/048

Abstract: PURPOSE:To increase the number of characters to be displayed by displaying a detection line in one write pen detecting field on one scanning line and displaying a subsequent detection line in one write pen detecting field on a subsequent scanning line. CONSTITUTION:A column '0' in a display screen displays an initial character box and a column 79 displays an eightyth character box. The write pen detection line shown by double circles in columns '0', '1' and '2' in a first group is displayed on a scanning line L3 and the write pen detection line of columns '4' and '5' in a second group is displayed on the subsequent scanning line such as a scanning line L4. The write pen detection line of columns '7', '8'... in a third group is displayed in the scanning line L3. The following lines are similarly displayed. Thus, the number of the characters which is displayed on a display surface can be increased.