Title:
【発明の名称】デイスプレイ上に表示される文字を縮小する方法及び装置
Document Type and Number:
Japanese Patent JPS59501180
Kind Code:
A
Abstract:
Method and apparatus, in presentation of characters on a display screen, for presenting these in reduced format in relation to a normal size. The apparatus contains a font memory (CM) for storing the characters in their normal size in a character matrix built up from a plurality of rows and columns and individually associated with each of the characters. Information as to the configuration of the character is also stored in the character matrix. Presentation on the display is controlled by a control unit (CU), in turn controlled by a microprocessor (CP). The principle is that a character can be formed on the display with the aid of juxtaposed dots, of which some are alight and some extinguished, depending on the configuration of the displayed character. A document memory (DM) chargeable from the processor (CP) is addressed from said processor in a reading-out step, and on indication from the control unit (CU) sends the character, determined by the address, in the form of a character- and position-determining binary code to the font memory (CM). Said binary code constitutes the address for the image dot information which is to be fed out from the font memory when the latter is addressed. A reduced character is generated by a plurality of lines and columns in the character matrix being jumped over in accordance with a desired degree of reduction, after indication in the font memory. For example, if halving of the character format is desired, then only alternate columns are read out from the font memory under control of a column address compression circuit (KA) which sends a supplementary address to the font memory, pointing out what columns in the respective character matrix are to be fed out from the memory, depending on the degree of reduction. For n times reduction every nth column is read out on generating the character. For halving in height, the information read out from the font memory is compressed with the aid of a gate network (OR). The result of the reducing operation, e.g. halving, will be that a character is presented on the display which is half as large as the one stored in the character matrix, and for division by n, a character is presented on the display which is reduced n times both in height and width.
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Inventors:
Lindstro -Mu Rals Gunna-
Application Number:
JP50221283A
Publication Date:
July 05, 1984
Filing Date:
June 16, 1983
Export Citation:
Assignee:
Telefon Acti-Boraget Erm Ericson
International Classes:
G09G5/26; G09G5/00; (IPC1-7): G09G1/00
Attorney, Agent or Firm:
Hideto Asamura