Keyboard device

Abstract

Abstract 1. A keyboard device (1) of the kind in which the keys (TIJ), when they are pressed, close a contact between conductors (LI, CJ) connected to the inputs/outputs of a microcomputer (2) or of a logic circuit respectively programmed or arranged to scan the keys (TIJ), these conductors being formed by M columns (CJ) and N lines (LI) at the intersections of which are situated the keys and the associated contacts (TIJ), characterized in that at least one column (C0 to C3) is connected to an input/output (A0 to A3) only by one line (L0 to L3) with interpositioning of a diode (D0 to D3) between the column and the line, the intersection of this column and this line not comprising a key and associated contact (T00, T11, T22, T33).

Inventors

• 👤 Patrick Jean-Pierre Herbault
• 👤 Jean-Jacques Alain Louis Bosc

Bibliographic Details