Samsung Electronics Co., Ltd.

Hewlett-Packard Development Company, L.p.

Hp Printing Korea Co., Ltd.

Wan-chin Kim

Su-Hwan Kim

A light-emitting element array module includes a control driver configured to receive print data and operate, and light-emitting element array chips configured to receive a signal from the control driver, respectively, and operate, wherein the light-emitting element array chips are connected to the control driver through respective data lines, and the control driver controls an operation point in time of each of the light-emitting element array chips by adjusting input points in time of a start signal and a data signal according to a registration error of each of the light-emitting element array chips.

Light-emitting element array module and method of controlling light-emitting element array chips

A luminous flux limit device, an optical scanning unit employing the luminous flux limit device, and an electrophotographic image forming apparatus are provided. The luminous flux limit device limits a luminous flux of the optical scanning unit and includes a light-blocking portion, a light transmissive region around the light blocking region, and a light blocking outer region around the light transmissive region.

Luminous flux limit device, optical scanning unit employing the same, and electrophotographic image forming apparatus

A light scanning unit and an electrophotographic image forming apparatus are provided. The light scanning unit includes a light source emitting the light beams according to an image signal, an incident optical system including a flux-limiting element limiting the flux of light beams emitted by the light source, an optical deflector deflecting the light beams emitted by the light source in a main scanning direction, and an image forming optical system including a scanning optical element imaging the light beams deflected by the optical deflector on a scanning target surface, the light scanning unit forming an electrostatic latent image by scanning the light beams to the scanning target surface of the image bearing member. The scanning optical element of the scanning optical elements of the image forming optical system is eccentrically arranged from a central optical axis of the image forming optical system in a sub-scanning direction.

Light scanning unit and image forming apparatus including the same

A lens array, a linear light exposure device, and an optical apparatus including the linear light exposure device. The lens array includes: an image side lens array unit in which a plurality of lens cells are arranged in at least one line along an arrangement direction to have optical axes parallel with each other; and a light blocking unit provided on an incidence surface of the image side lens array unit, the light blocking unit having light transmission regions, through which light is transmitted toward each lens cell, and blocking regions in regions other than the light transmission regions, wherein each lens cell of the image side lens array unit has a square formed effective optical region.

Growing community of inventors

Seoul, South Korea

Wan-chin Kim