Method of storing character data in a display device

Details Method of storing character data in a display device Method of storing character data in a display device

1992-10-15

1994-05-31

Herndon, Heather R.

395164, G06F 1562

Patent

active

053176847

ABSTRACT:
A logic processor-controlled data display apparatus having a display memory in which pixel data representing text for display is stored in bit-map form. The pixel data is produced for each display from character data stored in a background memory. When the character data is stored in bit-map form it can be read directly from the background memory bit-by-bit and written into the display memory as the pixel data. However, this process takes a large number of programme steps, so that the transfer of the data is relatively stow. The present invention provides for the storage in the background memory of character data in the form of machine code sub-routines. The sub-routine for a character contains instructions for identifying the shape-defining pixels (dots) of the character relative to a base dot position and the sub-routine is run to write these pixels into the display memory following location of the base dot position in the display memory.

REFERENCES:
patent: 4079458 (1978-03-01), Rider et al.
patent: 4228510 (1980-10-01), Johnson et al.
patent: 4296476 (1981-10-01), Mayer et al.
patent: 4408197 (1983-10-01), Komatsu et al.
patent: 4408200 (1983-10-01), Bradley
patent: 4589144 (1986-05-01), Namba
patent: 4622546 (1986-11-01), Sfarti et al.
patent: 4641351 (1987-02-01), Preston
patent: 4642789 (1987-02-01), Lavelle
patent: 4649380 (1987-03-01), Penna
patent: 4663619 (1987-05-01), Staggs et al.
patent: 4672371 (1987-06-01), Bugg
patent: 4695835 (1987-09-01), Bugg
D. E. Schreiber, "Computing a Set of Triangular Plates Which Represent a Potential Surface of a Scalar Function Defined at the Vertices of a Three-Dimensional Cartesian Mesh", IBM Technical Disclosure Bulletin, vol. 18, No. 4, Sep. 1975.

Affiliated with

Also associated with

Rating

Method of storing character data in a display device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of storing character data in a display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of storing character data in a display device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1634337