Method and circuit for controlling a band display of a plurality of analog signals using a single anode type bar graph device

摘要

A method for a band display of at least two analog signals in a display device having a display scale with a plurality of successive display elements of which a part defined by an analog signal in each scanning cycle is made luminous by a specified scanning frequency to produce an analog display, comprises changing the current supply to the display elements and changing the scanning speed of the display elements to produce a three level variation of light intensity on the same display scale. A light spot of a specified length displaying the value of a first analog signal is provided on the display scale by a first level of light intensity. A uniform light column displaying the value of a second analog signal is provided on the display scale by a second, middle, level of light intensity. A separation is provided on the display scale between the first analog signal display and the second analog signal display by a third level of light intensity.