Shutter speed indicator device

摘要

In a camera, a numerical indication of the shutter speed is displayed thru the viewfinder. Numerals corresponding to the several shutter speeds are arranged to be illuminated, and therefore visible, by light emitting diodes associated therewith. The array of light emitting diodes have their cathode and anode terminals coupled together in groups arranged to reduce the total number of external connections to the diode array. The shutter speed is converted to a digital value which is applied to a decoder. The decoder energizes the external terminals of the diode array to selectively energize only one diode, corresponding to the shutter speed.