Patent ID: 7471709
Filing Date: 2008-12-30
Classification: H01S,H04N

Abstract:
1. An apparatus to control emission of a laser beam in a laser image forming apparatus, comprising: an input power supply to supply a plurality of input voltages according to a normal mode and a mode which saves toner selected by a user; a switch to select one input voltage from the plurality of input voltages supplied from the input power supply according to a mode selection signal indicating the normal mode and a mode which saves toner selected by the user; a laser diode to emit a laser beam; and a laser emission controller to generate a control voltage according to the selected input voltage to control a laser beam emission of the laser diode to a photosensitive drum of the laser image forming apparatus and to supply a current, for controlling the laser beam emission from the laser diode to the photosensitive drum according to the generated control voltage, to the laser diode so as to control an output image concentration.