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    • 5. 发明申请
    • IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING THE SAME
    • 图像形成装置及其控制方法
    • US20070236553A1
    • 2007-10-11
    • US11697976
    • 2007-04-09
    • Yuuzou KAWANOKouhei SUYAMAKazuo NISHIMURA
    • Yuuzou KAWANOKouhei SUYAMAKazuo NISHIMURA
    • B41J2/385
    • G03G15/326G03G15/04072G03G2215/0404
    • To provide an image forming apparatus capable of preventing a fluctuation in image density immediately after the light quantities are corrected, and a method for controlling the same, when light quantity measurement is carried out at time t1, the controller CPU calculates the light quantity correction value ND. Herein, it is assumed that the light quantity correction value ND calculated previously, which is the light quantity correction value before light quantity measurement at time t1, is NDold, and the light quantity correction value ND calculated based on the light quantity measurement value at time t1 is NDnew. When the light quantity correction NDnew is calculated, the controller CPU varies the light quantity correction value ND from the light quantity correction value NDold a plurality of times by a predetermined variation value α in the direction approaching the light quantity correction value NDnew for each of the printing sheets.
    • 为了提供能够在光量修正后立即防止图像浓度波动的图像形成装置及其控制方法,当在时间t 1进行光量测量时,控制器CPU计算光量校正 值ND。 这里,假设在时刻t 1,在光量测量前的光量校正值为先前计算的光量校正值ND为NDold,并且基于光量测量值在 时间t 1是NDnew。 当计算光量校正值NDnew时,控制器CPU将光量校正值ND从光量校正值NDold多次修正接近光量校正值NDnew的方向上的预定变化值α, 打印纸。
    • 9. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20070229647A1
    • 2007-10-04
    • US11691724
    • 2007-03-27
    • Yuuzou KAWANOKouhei SUYAMAKazuo NISHIMURAYuuji TOYOMURA
    • Yuuzou KAWANOKouhei SUYAMAKazuo NISHIMURAYuuji TOYOMURA
    • B41J2/435
    • B41J2/45G06K15/1209G06K15/1247
    • When a driving current value of at least one light emitting element (an organic EL element) has reached a correction limit current value, a controller CPU of a controller constituting a light intensity correcting unit does not correct the light intensity of the light emitting element. Alternatively, the controller CPU may correct the light intensity of the light emitting elements other than a reference light emitting element on the basis of the light intensity of the reference light emitting element using the light element of which the driving current value is greatest as the reference light emitting element. Alternatively, the controller CPU may correct the light intensity of the light emitting elements other than a reference light emitting element on the basis of the light intensity of the reference light emitting element, using the light emitting element of which the light intensity is smallest when the entire light emitting elements are driven with the same driving condition as the reference light emitting element.
    • 当至少一个发光元件(有机EL元件)的驱动电流值已经达到校正极限电流值时,构成光强度校正单元的控制器的控制器CPU不校正发光元件的光强度。 或者,控制器CPU可以基于使用驱动电流值最大的光元件作为参考的基准发光元件的光强度来校正除参考发光元件之外的发光元件的光强度 发光元件。 或者,控制器CPU可以使用光强度最小的发光元件,基于参考发光元件的光强度来校正除参考发光元件之外的发光元件的光强度 整个发光元件以与参考发光元件相同的驱动条件被驱动。