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11. 发明授权

US5450212A Image forming apparatus and method 失效
标题翻译：图像形成装置及方法
公开(公告)号：US5450212A
公开(公告)日：1995-09-12
申请号：US366425
申请日：1994-12-29
申请人： Kenichirou Asada
发明人： Kenichirou Asada
IPC分类号： H04N1/407 , H04N1/40 , H04N1/405 , H04N1/04
CPC分类号： H04N1/4056
摘要： An image forming apparatus comprises an image signal converting means. The image converting means converts a first image signal into a second image signal. The first image signal includes an n-bit digital signal indicating a tone level of an image. The second image signal includes an m-bit digital signal indicating the tone level of the image. Here, m and n are integers and m is greater than n. A predetermined relationship between 2.sup.n values expressible by the n-bit digital signal and 2.sup.n related values among 2.sup.m values expressible by the m-bit digital signal is according to a first image forming characteristic in the image forming apparatus. The image forming apparatus further comprises an image forming means having a second image forming characteristic. The image forming means is coupled to the image signal converting means and forms the image based on the second image signal related to a combination of the first and second image forming characteristics.
摘要翻译：图像形成装置包括图像信号转换装置。图像转换装置将第一图像信号转换为第二图像信号。第一图像信号包括指示图像的音调电平的n位数字信号。第二图像信号包括指示图像的音调电平的m位数字信号。这里，m和n是整数，m大于n。根据图像形成装置中的第一图像形成特性，由n位数字信号表示的2n个值和由m位数字信号表示的2m值之中的2n个相关值之间的预定关系是根据第一图像形成特性。图像形成装置还包括具有第二图像形成特性的图像形成装置。图像形成装置耦合到图像信号转换装置，并且基于与第一和第二图像形成特性的组合相关的第二图像信号形成图像。

12. 发明授权

US5068676A Image data storing device for an image forming apparatus 失效
标题翻译：用于图像形成装置的图像数据存储装置
公开(公告)号：US5068676A
公开(公告)日：1991-11-26
申请号：US565337
申请日：1990-08-10
申请人： Yoshiki Yoshida , Kenichirou Asada
发明人： Yoshiki Yoshida , Kenichirou Asada
IPC分类号： B41J2/44 , G03G15/04 , G06F3/12 , G06K15/02 , H04N1/113 , H04N1/21
CPC分类号： G06K15/02 , G06K2215/008
摘要： An image data storing device for an image forming apparatus having a plurality of line buffers to which image data are written from external equipment and from which the written image data are read to form an image. Selectors selectively cause the individual buffers into a read state, write state, and inoperative state. An image forming signal generator generates an image forming signal during one frame of image forming period. During an image forming period, the selectors condition each of the line buffers for any one of the above-mentioned three different states while, during a non-image forming period, they hold the line buffers in the individual states. This allows the line buffers to start operating under the same conditions whenever an image forming period is reached.
摘要翻译：一种用于图像形成装置的图像数据存储装置，具有多个行缓冲器，图像数据从外部设备写入，并且读取图像数据以形成图像。选择器选择性地使各个缓冲器进入读取状态，写入状态和不工作状态。图像形成信号发生器在图像形成周期的一帧期间产生图像形成信号。在图像形成期间，选择器对上述三种不同状态中的任意一种状态对每个行缓冲器进行调节，而在非图像形成期间，它们将行缓冲器保持在各个状态。这样，只要达到图像形成周期，线路缓冲器就可以在相同条件下开始运行。

13. 发明授权

US4845358A Synchronizing device for laser printer 失效
标题翻译：激光打印机同步装置
公开(公告)号：US4845358A
公开(公告)日：1989-07-04
申请号：US197466
申请日：1988-05-23
申请人： Kenichirou Asada
发明人： Kenichirou Asada
IPC分类号： G02B26/10 , B41J2/44 , H04N1/053 , H04N1/113 , H04N1/12 , H04N1/23 , H04N1/50
CPC分类号： H04N1/506 , H04N1/053 , H04N1/1135 , H04N1/12 , H04N2201/0471 , H04N2201/04784
摘要： A synchronizing device is used in a laser printer which comprises a polygonal mirror for periodically deflecting a laser beam which scans a scanning plane and a photodetector provided on the scanning plane outside a region in which a printing is made by the laser beam for outputting an output signal when the laser beam is detected. The output signal of the photodetector is used for producing an image scan clock signal which synchronizes each scan of the laser beam. The synchronizing device comprises a pulse generating circuit for generating a plurality of pulse signals having a frequency identical to that of the image scan clock signal and having phases which are successively shifted by a constant phase with respect to each other, a clock selecting circuit for selectively outputting one of the plurality of pulse signals generated by the pulse generating circuit as the image scan clock signal, and a setting circuit for arbitrarily setting the pulse signal to be selectively outputted from the clock selecting circuit responsive to the output signal of the photodetector.
摘要翻译：在激光打印机中使用同步装置，该激光打印机包括用于周期性地偏转扫描扫描平面的激光束的多面镜和设置在扫描平面上的光电检测器，该区域由用于输出输出的激光束进行打印的区域外当检测到激光束时信号。光电检测器的输出信号用于产生同步激光束每次扫描的图像扫描时钟信号。同步装置包括脉冲发生电路，用于产生具有与图像扫描时钟信号的频率相同的频率的多个脉冲信号，并具有相对于彼此连续偏移恒定相位的相位，选择性地输出由脉冲发生电路产生的多个脉冲信号中的一个作为图像扫描时钟信号，以及设置电路，用于根据光电检测器的输出信号任意设置要从时钟选择电路选择性地输出的脉冲信号。

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