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    • 13. 发明授权
    • Image forming apparatus with exposure control having a smoothing function
    • 具有平滑功能的曝光控制的图像形成装置
    • US5767982A
    • 1998-06-16
    • US729368
    • 1996-10-17
    • Yoshikazu TakahashiSatoshi HirotaYu Tsuda
    • Yoshikazu TakahashiSatoshi HirotaYu Tsuda
    • B41J2/44B41J2/485G03G15/04G03G15/043G06K15/12H04N1/23H04N1/40H04N1/29
    • H04N1/40037G06K15/1223
    • An image forming apparatus using a photosensitive body (1) having high gamma characteristics has an exposure unit that is provided with a radiation element whose exposure value is variably set and which is capable of blinking on a pixel-by-pixel basis. An exposure controller (6) is provided with an exposure pattern determining unit (7) that determines an exposure pattern according to the image pattern, and an exposure value switching unit (8) that switches between an exposure value A1 at which the potential of the photosensitive body (1) sharply attenuates and an exposure value A2 at which the potential of the photosensitive body (1) does not substantially attenuate, on the basis of the exposure pattern determined by the exposure pattern determining unit (7). The exposure pattern determining unit (7) is provided with an image area processor (9) that exposes image pixels to an intensive beam having the exposure value A1, and a smoothing processor (10 and 11) that exposes at least white pixels which are adjacent to the image pixels and are to be smoothed to a weak beam having the exposure value A2.
    • 使用具有高伽马特性的感光体(1)的图像形成装置具有曝光单元,该曝光单元设置有曝光值可变地设定并且能够逐个像素地闪烁的辐射元件。 曝光控制器(6)设置有根据图像图案确定曝光图案的曝光图案确定单元(7),以及曝光值切换单元(8),其在曝光值A1 基于由曝光图案确定单元(7)确定的曝光图案,感光体(1)急剧衰减,感光体(1)的电位基本上不衰减的曝光值A2。 曝光图案确定单元(7)设置有将图像像素曝光到具有曝光值A1的强光束的图像区域处理器(9),以及至少暴露出相邻的白色像素的平滑处理器(10和11) 并且要平滑到具有曝光值A2的弱光束。
    • 14. 发明授权
    • Press control for maintaining a level position and a uniform pressure on
a workpiece
    • 压力控制用于保持工件的水平位置和均匀的压力
    • US4784058A
    • 1988-11-15
    • US80477
    • 1987-07-31
    • Noriharu NakagawaMasanobu KurumajiKazuyuki KijayamaKoichi FukushimaNobuo KimuraSatoshi HirotaHiroaki KondoHiroyuki KuwanoToshiaki AkitaTsutomu Sano
    • Noriharu NakagawaMasanobu KurumajiKazuyuki KijayamaKoichi FukushimaNobuo KimuraSatoshi HirotaHiroaki KondoHiroyuki KuwanoToshiaki AkitaTsutomu Sano
    • B30B15/24
    • B30B15/245
    • A press working control method for controlling the press working operation of a press having a pressure cylinder for applying a working pressure to a workpiece, a press slide operatively connected to the pressure cylinder and carrying a movable die, a bed fixedly mounted with a fixed die, a plurality of control cylinders supporting the press slide in a level position during the press working operation, and a press control system for carrying out the press working control method. The press control system comprises a first pressure detector for detecting the operative pressure of the pressure cylinder, quick-response control valves each for regulating the height of the control cylinder, height detectors each for detecting the height of the control cylinder, second pressure detectors each for detecting the operative pressure of the control cylinder, servovalves each for detecting the operative pressure of the control cylinder, and a control unit including a computer for deciding manipulated variables for the height and operative pressure control of the control cylinders on the basis of data obtained by the detectors. The respective heights of the control cylinders are regulated individually so that the press slide is maintained in a level position during the press working operation, while the respective operative pressure of the control cylinders are regulated so that a desired working pressure is applied to the workpiece.
    • 一种压制工作控制方法,用于控制具有用于向工件施加工作压力的压力缸的压力机的冲压加工操作,可操作地连接到压力缸并承载可动模具的压力机滑块,固定地安装有固定模具的床 在冲压加工动作期间将压入滑块支撑在水平位置的多个控制缸,以及用于进行冲压加工控制的压力控制系统。 压力控制系统包括用于检测压力缸的工作压力的第一压力检测器,用于调节控制气缸高度的快速响应控制阀,用于检测控制气缸高度的高度检测器,每个 用于检测控制气缸的操作压力,用于检测控制气缸的操作压力的伺服阀,以及包括计算机的控制单元,用于基于获得的数据来确定控制气缸的高度和操作压力控制的操纵变量 由检测器。 控制缸的相应高度被单独调节,使得在压力加工操作期间压力机滑块保持在水平位置,同时调节控制气缸的相应操作压力,使得对工件施加期望的工作压力。