| 摘要 |
Described is an integrated circuit (IC) serving as a timed drive (CLK, SCK) of a display matrix (LCD) intended for the display of multi-character text comprising letters, numbers and/or other symbols and including the following features: the display matrix (LCD) has very many more columns than lines in order to display at least one line of text; several identical integrated circuits (IC1...ICn), i.e. a series of such circuits, provide column signals (S) for the control of the columns of the display matrix (LCD), each circuit controlling only some of the columns; the integrated circuit includes a shift register (SR1) into which those bits (Byte 1, Byte 2....) are shifted which correspond to the text displayed on the display matrix, or at least a section of this text; the input (SIN) and output (SOUT) of the shift register (SR1) are connected directly, or at the most via isolating switches (S2) and/or driver units, with pins (SIN, SOUT) of the integrated circuit in order to make it possible, when necessary, to shift the bits (Byte 1, Byte 2....), under fixed-cycle control (SCK), successively through the shift registers (SR1) of the series of integrated circuits (IC1...ICn); the integrated circuit is controlled by a control processor when the former is in operation; in the integrated circuit, a character generated (CG) with its own memory unit (ROM) is connected in series with the shift register (SR1); the character generator (CG), when in operation, converts at least some of the bits, each of which basically corresponds only to a short code representing the meaning of the relevant character, by means of the memory unit (ROM/CG) which is addressed by these bits (Byte 1, Byte 2....), into output signals which correspond to the output signals (S) of the integrated circuit and only these output signals are supplied as column signals (S) to the display matrix column inputs associated with said integrated circuit. |
