IC as a timed drive of a display matrix

US5420600A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl-Heinz Strobel
• Max Gotz · Abensberg, DE
• Robert Forster · Geesthacht, DE

Key dates

• Filing date: Oct 7, 1993
• Grant date: May 30, 1995
• Expiry date: Oct 7, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G3/3674
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An IC for use in an IC apparatus for providing a timed drive of a display matrix, the display matrix displaying a multi-place text composed of at least one of letters, figures and other characters, and the display matrix having more columns than lines in order to display at least 1-line text. A plurality of identically structured ICs form a chain of such ICs that supply column signals for controlling the columns of the display matrix. Each IC has at least a shift register, a character generator and or read-only memory. The shift register into which bits are shifted which correspond to at least a section of text to be displayed on the display matrix has an input and an output operatively connected to an input pin and an output pin, respectively, of the IC. The character generator is connected downstream of the shift register, the character generator having a separate memory unit, and during operation, the character generator converting into output signals at least some of the bits, which correspond to only a short code for the contents of relevant characters by means of the memory unit which is addressed by these bits. The read-only memory stores bits which are required for differen…