发明名称 |
Image forming apparatus and turn-on time correction method |
摘要 |
An image forming apparatus includes a light source that emits light beams for scanning a photoconductive element and for image forming of image data, a storage unit that stores a correction amount of a turn-on time of the light source associated with a preset turn-on pattern of the light beams, an acquiring unit that compares a pattern of the image data with the turn-on pattern, so as to acquire the correction amount corresponding to the pattern of the image data which is associated with the turn-on pattern, from the storage unit; and a light source controller that controls turn-on of the light source by a turn-on time corrected with acquired correction amount. |
申请公布号 |
US8866865(B2) |
申请公布日期 |
2014.10.21 |
申请号 |
US201113050563 |
申请日期 |
2011.03.17 |
申请人 |
Ricoh Company, Limited |
发明人 |
Maeda Katsuhiko |
分类号 |
B41J2/435;B41J2/47;G03G15/32;G02B26/12;G03G15/043 |
主分类号 |
B41J2/435 |
代理机构 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. An image forming apparatus comprising:
a light source that emits light beams for scanning a photoconductive element and for image forming of image data; a storage unit that stores a correction amount of a turn-on time of the light source associated with a preset turn-on pattern of the light beams; an acquiring unit that compares a pattern of the image data with the turn-on pattern, so as to acquire the correction amount corresponding to the pattern of the image data which is associated with the turn-on pattern, from the storage unit; a light source controller that controls turn-on of the light source by a turn-on time corrected with acquired correction amount; a light amount detector configured to detect an integrated light amount of the light beams emitted from the light source for each turn-on pattern, the light source being a VCSEL having a plurality of light sources, which collectively are detected and subsequently corrected; and a calculating unit configured to calculate a turn-on time of the light source, as the correction amount, corresponding to a difference between detected integrated light amount and an integrated target light amount which is an integral of target light amounts, each of which is a preset target value of the light amount of the light source, and stores calculated turn-on time in the storage unit. |
地址 |
Tokyo JP |