Kengo Kawamoto

20130328992, Dec 12, 2013

Jun 5, 2013

13/910854

- Tokyo, JP
Kengo Kawamoto - Irvine CA, US

B41J 2/435

347224

An image forming apparatus including a control unit configured to cause the light irradiation unit to irradiate the photosensitive member at an image forming portion to which toner particles adhere with light emitted from the light source by a first light emission amount, and cause the light irradiation unit to irradiate the photosensitive member at a non-image forming portion to which no toner particles adhere with light emitted from the light source by a second light emission amount that is smaller than the first light emission amount. The image forming apparatus further includes an adjusting unit configured to adjust the first light emission amount and the second light emission amount, and an acquisition unit configured to acquire information relating to a speed of surface of the photosensitive member. The adjusting unit is configured to change the second light emission amount according to information acquired by the acquisition unit.

20120300009, Nov 29, 2012

May 16, 2012

13/472935

Kiyoto Toyoizumi - Susono-shi, JP
Masaru Shimura - Yokohama-shi, JP
Hideo Nanataki - Yokohama-shi, JP
Kengo Kawamoto - Irvine CA, US

CANON KABUSHIKI KAISHA - Tokyo

B41J 2/385

347118

Provided is a color image forming apparatus which has photosensitive members and a light irradiation unit irradiating at least one of the photosensitive members, the color image forming apparatus including: a laser driving unit causing the light irradiation unit to emit light of a light amount at a first emission level for printing when exposing an image portion and to emit light of a light amount at a second emission level for weak emission when exposing a non-image portion; an acquiring unit acquiring information of remaining lifetime of each of the photosensitive members; a first light intensity adjusting unit adjusting a first drive current to emit light at the first emission level; and a second light intensity adjusting unit adjusting a second drive current to emit light at the second emission level, the second light intensity adjusting unit changing the second drive current in accordance with the information.

20140334835, Nov 13, 2014

Jul 23, 2014

14/338649

- Tokyo, JP
Masaru Shimura - Yokohama-shi, JP
Hideo Nanataki - Yokohama-shi, JP
Kengo Kawamoto - Irvine CA, US

CANON KABUSHIKI KAISHA - Tokyo

G03G 15/043

399 51

Provided is a color image forming apparatus which has photosensitive members and a light irradiation unit irradiating at least one of the photosensitive members, the color image forming apparatus including: a laser driving unit causing the light irradiation unit to emit light of a light amount at a first emission level for printing when exposing an image portion and to emit light of a light amount at a second emission level for weak emission when exposing a non-image portion; an acquiring unit acquiring information of remaining lifetime of each of the photosensitive members; a first light intensity adjusting unit adjusting a first drive current to emit light at the first emission level; and a second light intensity adjusting unit adjusting a second drive current to emit light at the second emission level, the second light intensity adjusting unit changing the second drive current in accordance with the information.