Two-dimensional encoded symbol reading device with plural operating modes

Abstract

An encoded symbol reader for reading and decoding an image of an encoded symbol is capable of operating in three modes and has a CCD, a display, and a light source. In each mode, the reading of an encoded symbol is initiated by a trigger switch. In the first mode, the CCD, display and light source are continuously driven and remain in an ON state. In the second mode, the CCD, display and light source are turned OFF when a decoding operation is completed after the trigger switch is released. In the third mode, the CCD, display, light source are turned OFF after a predetermined period has elapsed after the decoding operation is completed and the trigger switch is released. While operating in the third mode, during the predetermined interval, the re-reading of another symbol can be immediately executed without having to wait for the components to warm up.