Patent ID: 8878886

Claim:
A light beam scanning device comprising: a light source including a plurality of light emitting elements configured to emit light beams respectively for forming an electrostatic latent image on a photosensitive member, said plurality of light emitting elements including a first light emitting element, a second light emitting element, and a third light emitting element; a deflection unit configured to deflect the light beams emitted respectively from said light emitting elements, such that each light beam scans the photosensitive member in a predetermined direction; a light receiving unit configured to receive the light beams deflected by said deflection unit, for receiving each light beam; and a control unit configured to perform light amount control for controlling an amount of light of each of the light beams emitted respectively from said light emitting elements, based on a result of reception of the light beam by said light receiving unit, wherein in said light source, said first light emitting element and said second light emitting element are arranged such that both a light beam from said first light emitting element and a light beam from said second light emitting element enter said light receiving unit at the same time and a light beam from said third light emitting element and the light beam from said first light emitting element do not enter said light receiving unit at the same time, and the light beam from said first light emitting element and the light beam from said second light emitting element are adjacent to each other in the predetermined direction, and wherein said control unit executes the light amount control of the light beam from said first light emitting element and the light amount control of the light beam from said second light emitting element, in receptive different cycles of scanning of the light beams, and executes the light amount control of the light beam from said first light emitting element and the light amount control of the light beam from said third light emitting element, in the same cycle of scanning of the light beams.