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    • 8. 发明授权
    • Image forming apparatus with random number generator
    • 具有随机数发生器的图像形成装置
    • US07701613B2
    • 2010-04-20
    • US11678820
    • 2007-02-26
    • Toshihiro Doi
    • Toshihiro Doi
    • H04N1/40H04N1/405
    • H04N1/40025
    • In an image forming apparatus which expresses lamp lighting energy corresponding to input gray scale data on the basis of on/off of lighting lamp of plural sub-dots corresponding to different lamp lighting times of different assistant scanning positions, with respect to such image that rapidly changes from a state close to white level toward a state close to black level, or with respect to such image that rapidly changes from a state close to black level toward a state close to white level, in order to decrease that a thin white stripe or a thin black stripe happens on the border portion, a random generator 34 and a adding circuit 33 are provided so that: whenever the gray scale value is inputted to the gray scale value input register 31, with respect to the lamp lighting energy, a random number of predetermined level is added.
    • 在图像形成装置中,基于与不同的辅助扫描位置的不同的灯发光时间对应的多个子点的照明灯的开/关来表示与输入的灰度数据对应的灯点亮能量的图像形成装置, 从接近白电平的状态向接近黑电平的状态变化,或者相对于从接近黑电平的状态向接近白电平的状态迅速变化的图像,为了减少薄白条带或 在边界部分发生细黑条纹,随机发生器34和加法电路33被设置为:每当将灰度值输入灰度值输入寄存器31时,相对于灯点亮能量,随机发生器 添加预定级别的数量。
    • 9. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20070206243A1
    • 2007-09-06
    • US11678820
    • 2007-02-26
    • Toshihiro Doi
    • Toshihiro Doi
    • H04N1/46
    • H04N1/40025
    • In an image forming apparatus which expresses lamp lighting energy corresponding to input gray scale data on the basis of on/off of lighting lamp of plural sub-dots corresponding to different lamp lighting times of different assistant scanning positions, with respect to such image that rapidly changes from a state close to white level toward a state close to black level, or with respect to such image that rapidly changes from a state close to black level toward a state close to white level, in order to decrease that a thin white stripe or a thin black stripe happens on the border portion, a random generator 34 and a adding circuit 33 are provided so that: whenever the gray scale value is inputted to the gray scale value input register 31, with respect to the lamp lighting energy, a random number of predetermined level is added.
    • 在图像形成装置中,基于与不同的辅助扫描位置的不同的灯发光时间对应的多个子点的照明灯的开/关来表示与输入的灰度数据对应的灯点亮能量的图像形成装置, 从接近白电平的状态向接近黑电平的状态变化,或者相对于从接近黑电平的状态向接近白电平的状态迅速变化的图像,为了减少薄白条带或 在边界部分发生细黑条纹,随机发生器34和加法电路33被设置为:每当将灰度值输入灰度值输入寄存器31时,相对于灯点亮能量,随机发生器 添加预定级别的数量。