公开(公告)号：JPH07210111A

公开(公告)日：1995-08-11

申请号：JP25516494

申请日：1994-10-20

Applicant: IBM

Inventor： SUCHIIBUN PATORITSUKU TOMUSON ,  OIE MASAKI ,  OGURA AKIHIRO ,  TAKEMURA KIYOSHI ,  JIYOOZEFU DARIRU HAAUTSUDO

IPC: G09G3/20 ,  G09G5/00 ,  G09G5/36

Abstract: PURPOSE: To provide a system for enlarging a picture in the horizontal direction with a variable magnification on a high-resolution display provided with a flat panel containing a low-resolution display mode. CONSTITUTION: In a first method, an intermediate over-sampled data sequence is first obtained by over-sampling a first picture element data sequence to be enlarged at a frequency of the magnification of the frequency of the first picture element data sequence. Then a copied second data sequence which is longer than the first data sequence is obtained by linearly decimating the over-sampled data sequence with a magnification smaller than '1' and the second data sequence is displayed. In a second method, an interpolating over-sample data sequence is formed by filtrating the intermediate over-sampled data sequence and the sequence is decimated in place of the intermediate over-sample data sequence in order to further improve the quality of a screen image. Therefore, the size, complexity, and cost of the video subsystem of a computer can be reduced, because no graphic controller nor any special mechanism for display logic mechanism is required and complicated picture processing is eliminated.

公开(公告)号：JPH05108299A

公开(公告)日：1993-04-30

申请号：JP6566292

申请日：1992-03-24

Applicant: IBM

Inventor： DEEBUITSUDO KAARU FURANKU ,  MATSUBARA SHIGERU ,  SATOU HIROSHI ,  SUCHIIBUN PATORITSUKU TOMUSON

IPC: G06F3/14 ,  G06F3/048 ,  G09G1/00 ,  G09G5/08 ,  G09G5/14

Abstract: PURPOSE: To display a line between screen areas without changing the existing display circuit by displaying a first screen being a host data area and a second screen being an operator information area respectively at upper and lower parts in a divided screen operational mode, and generating a horizontal separator line between those areas. CONSTITUTION: A display screen controller 12 is operated in a divided screen operation mode, and a first screen area being a host data area and a second screen area being an operator information area(OIA) (neither is shown in a figure) are displayed respectively at upper and lower parts. The controller 12 reads data from a screen memory (not shown in a figure) and displays a corresponding alphanumeric character line so that each alphanumeric character can be displayed as plural picture elements arrayed along a first numeric horizontal scanning line. Next, the controller 12 displays a horizontal visual separator line (not-shown in a figure) between the final line in the first screen area and the first line in the second screen area. Thus, this line is displayed without changing the control circuit 12.