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    • 4. 发明授权
    • Developing unit and image forming apparatus
    • 显影单元和成像设备
    • US08014690B2
    • 2011-09-06
    • US12042684
    • 2008-03-05
    • Shoichi SakataTakahisa NakaueToyotsune InoueAkihiro WatanabeMasashi FujishimaYukihiro Mori
    • Shoichi SakataTakahisa NakaueToyotsune InoueAkihiro WatanabeMasashi FujishimaYukihiro Mori
    • G03G15/06
    • G03G15/065
    • A developing unit has a voltage-applicator (80) to apply a developing bias voltage to a developing roller (72). The voltage-applicator (80) applies the developing bias voltage for a first duration to apply an AC voltage having a rectangular waveform, and a second duration to stop applying the AC voltage. The AC voltage has a duty ratio of 50% or more in a direction for causing toner to develop an electrostatic latent image. The number of cycles of the AC voltage in the first duration is two or more, and the AC voltage has a voltage in a direction for pulling the toner back to the developing roller, just before transition to the second duration. The developing unit suppresses occurrence of image unevenness due to a fluctuation in developing gap. Thus, an image forming apparatus equipped with the developing unit forms a high-quality image while suppressing image unevenness.
    • 显影单元具有向显影辊(72)施加显影偏压的电压施加器(80)。 电压施加器(80)施加显影偏压第一持续时间以施加具有矩形波形的交流电压和第二持续时间以停止施加AC电压。 AC电压在使调色剂显影静电潜像的方向上具有50%以上的占空比。 在第一持续时间内的交流电压的周期数为两个或更多个,并且在转换到第二持续时间之前,AC电压具有用于将调色剂拖回显影辊的方向上的电压。 显影单元抑制由于显影间隙的波动引起的图像不均匀的发生。 因此,配备有显影单元的图像形成装置在抑制图像不均匀的同时形成高质量图像。
    • 7. 发明授权
    • Lane boundary detector
    • 车道边界检测器
    • US07808523B2
    • 2010-10-05
    • US11135442
    • 2005-05-24
    • Makoto NishidaAkihiro Watanabe
    • Makoto NishidaAkihiro Watanabe
    • H04N7/18
    • G06K9/3241G05D1/0246G05D2201/0213G06K9/00798G06T7/12G06T2207/10016G06T2207/20061G06T2207/30256
    • A boundary detector includes a candidate line detecting unit that detects a candidate line of a lane boundary position drawn on a road surface based on image data of a predetermined detection time period acquired from a camera. The detector also includes a lane boundary position selecting unit that selects a lane boundary position based on the candidate line; a branch lane boundary position selecting unit that selects a lane boundary position of a branch lane that diverts from a main lane based on the candidate line; and a branch processing unit that sets a branch process mode in which the detection time period is short without using the selected lane boundary position of the branch lane when the branch lane boundary position selecting unit selects the lane boundary position of the branch lane.
    • 边界检测器包括候选行检测单元,其基于从相机获取的预定检测时间段的图像数据来检测在路面上绘制的车道边界位置的候选行。 检测器还包括:车道边界位置选择单元,其基于候选行选择车道边界位置; 分支车道边界位置选择单元,其基于候选行选择从主车道分支的分支车道的车道边界位置; 以及分支处理单元,当分支车道边界位置选择单元选择分支车道的车道边界位置时,设置检测时间段短的分支处理模式,而不使用分支车道的所选车道边界位置。