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1. 发明授权

US07680425B2 Image forming apparatus and method for controlling tone characteristics based on tone-control patch image 失效
标题翻译：用于基于色调控制补片图像来控制色调特征的图像形成装置和方法
公开(公告)号：US07680425B2
公开(公告)日：2010-03-16
申请号：US10893743
申请日：2004-07-16
申请人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato , Ken Ikuma , Hidenori Kin
发明人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato , Ken Ikuma , Hidenori Kin
IPC分类号： G03G15/00
CPC分类号： G03G15/5058 , G03G15/0131 , G03G2215/00059 , G03G2215/00063 , G03G2215/0177 , H04N1/4078
摘要： An image It is formed as a patch image which includes a header image portion Ih of a solid image having a length of a circumferential length of a developing roller or more, and a gradation image portion Ig progressively varied in the tone level thereof from the maximum level to the minimum level. The densities of the patch image on an intermediate transfer belt are sampled. However, the sampling results contain errors resulting from noises or variations and hence, are subjected to a noise removal process, a periodical variation correction process and a reverse correction process. The results detected on the intermediate transfer belt do not always coincide with image densities (OD values) on a recording material. Therefore, the detection results are converted into the OD values, based on which tone characteristics of an apparatus is estimated. Then a tone correction table is updated in a manner to compensate for the tone characteristics. This approach is taken to improve image quality on the recording material.
摘要翻译：图像形成为补片图像，其包括具有显影辊或其以上的周长的长度的实心图像的标题图像部分Ih，并且其色调级别中的渐变图像部分Ig从最大值逐渐变化水平达到最低水平。对中间转印带上的贴片图像的密度进行采样。然而，采样结果包含由噪声或变化引起的误差，因此，进行噪声去除处理，周期性变化校正处理和反向校正处理。在中间转印带上检测到的结果并不总是与记录材料上的图像密度（OD值）重合。因此，根据估计装置的音调特性，将检测结果转换成OD值。然后以补偿色调特性的方式更新色调校正表。采取这种方法来改善记录材料上的图像质量。

2. 发明申请

US20050030562A1 Image forming apparatus, a control method for the same and an image forming method 失效
标题翻译：图像形成装置，其控制方法和图像形成方法
公开(公告)号：US20050030562A1
公开(公告)日：2005-02-10
申请号：US10893743
申请日：2004-07-16
申请人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato , Ken Ikuma , Hidenori Kin
发明人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato , Ken Ikuma , Hidenori Kin
IPC分类号： G03G15/00 , H04N1/407 , G03G15/06 , G06K15/14 , H04N1/29
CPC分类号： G03G15/5058 , G03G15/0131 , G03G2215/00059 , G03G2215/00063 , G03G2215/0177 , H04N1/4078
摘要： An image It is formed as a patch image which includes a header image portion Ih of a solid image having a length of a circumferential length of a developing roller or more, and a gradation image portion Ig progressively varied in the tone level thereof from the maximum level to the minimum level. The densities of the patch image on an intermediate transfer belt are sampled. However, the sampling results contain errors resulting from noises or variations and hence, are subjected to a noise removal process, a periodical variation correction process and a reverse correction process. The results detected on the intermediate transfer belt do not always coincide with image densities (OD values) on a recording material. Therefore, the detection results are converted into the OD values, based on which tone characteristics of an apparatus is estimated. Then a tone correction table is updated in a manner to compensate for the tone characteristics. This approach is taken to improve image quality on the recording material.
摘要翻译：图像形成为补片图像，其包括具有显影辊或其以上的周长的长度的实心图像的标题图像部分Ih，并且其色调级别中的渐变图像部分Ig从最大值逐渐变化水平达到最低水平。对中间转印带上的贴片图像的密度进行取样。然而，采样结果包含由噪声或变化引起的误差，因此，进行噪声去除处理，周期性变化校正处理和反向校正处理。在中间转印带上检测到的结果并不总是与记录材料上的图像密度（OD值）重合。因此，根据估计装置的音调特性，将检测结果转换成OD值。然后以补偿色调特性的方式更新色调校正表。采取这种方法来改善记录材料上的图像质量。

3. 发明授权

US06658221B2 Method of and apparatus for measuring quantity of toner on belt-shaped image carrier 失效
公开(公告)号：US06658221B2
公开(公告)日：2003-12-02
申请号：US10045015
申请日：2002-01-15
申请人： Takashi Hama , Hiroshi Nakazato
发明人： Takashi Hama , Hiroshi Nakazato
IPC分类号： G03G1500
CPC分类号： G03G15/5058 , G03G15/0131 , G03G2215/00042 , G03G2215/00059
摘要： A light emitting element irradiates light upon a surface area of an intermediate transfer belt which is wound around a roller, i.e., upon a wind area, and light receiving units receive light reflected at the wind area. Based on a signal outputted from a sensor, the quantity of toner is measured. In the wind area, the intermediate transfer belt does not flap in a direction which is approximately perpendicular to a direction in which the belt travels. This suppresses a change in distance (sensing distance) between the sensor and the intermediate transfer belt.

4. 发明授权

US06597878B2 Apparatus for measuring quantity of toner, and image forming apparatus comprising measuring apparatus 失效
标题翻译：用于测量调色剂量的设备，以及包括测量设备的图像形成设备
公开(公告)号：US06597878B2
公开(公告)日：2003-07-22
申请号：US09962154
申请日：2001-09-26
申请人： Hiroshi Nakazato , Takashi Hama , Yoshio Nakazawa
发明人： Hiroshi Nakazato , Takashi Hama , Yoshio Nakazawa
IPC分类号： G03G1500
CPC分类号： G03G15/5062 , G03G15/0131 , G03G15/5041 , G03G15/5058 , G03G2215/00042 , G03G2215/00059 , G03G2215/00063 , G03G2215/0634
摘要： A toner quantity measuring apparatus in which an input offset voltage is applied to the output side of an irradiation quantity monitoring light receiving element, so that a light emitting element remains turned off unless a light quantity control signal exceeds a predetermined signal level. Prior to irradiation of light upon an intermediate transfer belt and measurement of a toner quantity, a light quantity control signal below the predetermined signal level is supplied to an irradiation quantity adjusting unit and the light emitting element is turned off without fail. A memory stores, as a dark output voltage, an output voltage from a reflection quantity detecting unit upon the turning off. Light reflected from the intermediate transfer belt is split into p-polarized and s-polarized light to detect a toner quantity and colors of the toner. In actual measurement of the toner quantity, with light irradiated upon the intermediate transfer belt, the dark output voltage is subtracted from the output voltage outputted from the reflection quantity detecting unit, whereby an influence of the dark output voltage is eliminated.
摘要翻译：一种调色剂量测量装置，其中输入偏移电压施加到照射量监视光接收元件的输出侧，使得除非光量控制信号超过预定信号电平，否则发光元件保持关闭。在将光照射到中间转印带上并测量调色剂量之前，将低于预定信号电平的光量控制信号提供给照射量调节单元，并且发光元件关闭。作为暗输出电压，存储器在关闭时存储来自反射量检测单元的输出电压。从中间转印带反射的光被分裂为p偏振和s偏振光，以检测调色剂的调色剂量和颜色。在调色剂量的实际测量中，通过照射到中间转印带上的光，从反射量检测单元输出的输出电压中减去暗输出电压，从而消除暗输出电压的影响。

5. 发明授权

US06415114B1 Image forming apparatus and method 失效
公开(公告)号：US06415114B1
公开(公告)日：2002-07-02
申请号：US09986600
申请日：2001-11-09
申请人： Hiroshi Nakazato , Yoshio Nakazawa , Takashi Hama
发明人： Hiroshi Nakazato , Yoshio Nakazawa , Takashi Hama
IPC分类号： G03G1500
CPC分类号： G03G15/5058 , G03G15/065 , G03G2215/00042 , G03G2215/0174
摘要： In an apparatus, first and second processing modes are prepared to determine an optimal development bias. Either one of the first processing mode and the second processing mode is selected as a processing mode in accordance with an operation status of the apparatus. Hence, it is possible to select and execute the most appropriate processing mode in accordance with an operation status to thereby efficiently and highly accurately determine an optimal value of a development bias which is one density controlling factor.

6. 发明申请

US20050185973A1 Image forming apparatus, control method and toner consumption calculating apparatus and method 失效
标题翻译：图像形成装置，控制方法和调色剂消耗计算装置及方法
公开(公告)号：US20050185973A1
公开(公告)日：2005-08-25
申请号：US10855981
申请日：2004-05-27
申请人： Takashi Hama , Hidetsugu Shimura , Hidenori Kin , Keiichi Taguchi , Hiroshi Nakazato
发明人： Takashi Hama , Hidetsugu Shimura , Hidenori Kin , Keiichi Taguchi , Hiroshi Nakazato
IPC分类号： G03G15/00
CPC分类号： G03G15/5058 , G03G15/556 , G03G2215/0177
摘要： When the remaining toner amount within a developer is relatively large, a control target value of a toner amount is set to Ttgt1 and a lower limit value of a toner amount which can regarded proper is set to TL1. When the density of a patch image formed under a predetermined condition is smaller than a minimum guaranteed density Dma, it is determined abnormality has occurred in the apparatus. Since the characteristic of toner within the developer changes as the remaining toner amount decreases, the control target value is changed to Ttgt2 and the lower limit value is set to TL2 in light of this. In this fashion, regardless of whether the toner characteristic has changed, abnormality in the apparatus is detected without fail.
摘要翻译：当显影剂中的剩余调色剂量相对较大时，将调色剂量的控制目标值设置为Ttgt 1，将可以认为适当的调色剂量的下限值设置为TL 1。当在预定条件下形成的贴片图像的浓度小于最小保证密度Dma时，确定在装置中发生异常。由于显影剂中的调色剂的特性随着剩余调色剂量的减少而发生变化，所以根据此，将控制目标值改变为Ttgt2，将下限值设定为TL2。以这种方式，无论调色剂特性是否改变，装置中的异常都被检测到。

7. 发明授权

US06909858B2 Image forming apparatus, toner-adhesion calculation method and data processing method 失效
标题翻译：图像形成装置，调色剂附着计算方法和数据处理方法
公开(公告)号：US06909858B2
公开(公告)日：2005-06-21
申请号：US10633689
申请日：2003-08-05
申请人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato
发明人： Takashi Hama , Hidetsugu Shimura , Keiichi Taguchi , Hiroshi Nakazato
IPC分类号： G01J1/24 , G03G15/00 , G03G15/01 , G03G15/08 , G03G21/14
CPC分类号： G03G15/5058 , G03G2215/00042 , G03G2215/0177
摘要： Output signals Vp from a density sensor are sampled for plural positions on an intermediate transfer belt and an amount of toner adhesion is determined based on the results of sampling. Since these sample data pieces may contain noises, each predetermined number of data pieces of higher order and of lower order are removed from the resultant sample data string. The removed data pieces are each replaced by an average value Vpavg of the other sample data pieces. The amount of toner adhesion is calculated based on the data string thus replaced.
摘要翻译：来自密度传感器的输出信号Vp被采样到中间转印带上的多个位置，并且基于取样结果确定调色剂附着量。由于这些样本数据可能含有噪声，因此从所得到的样本数据串中去除每个预定数量的高阶和低阶数据。删除的数据片段被其他样本数据的平均值Vpavg替换。调色剂附着量基于这样替换的数据串计算。

8. 发明授权

US06621991B2 Image forming apparatus with predetermined target density and method 有权
标题翻译：具有预定目标密度和方法的图像形成装置
公开(公告)号：US06621991B2
公开(公告)日：2003-09-16
申请号：US09986601
申请日：2001-11-09
申请人： Hiroshi Nakazato , Takashi Hama
发明人： Hiroshi Nakazato , Takashi Hama
IPC分类号： G03G1500
CPC分类号： G03G15/065 , G03G15/5041 , G03G2215/00042 , G03G2215/0174
摘要： A development bias calculation and an electrifying bias calculation are executed in this order. In the development bias calculation, a plurality of toner images are formed as first patch images while changing the development bias. An optimal development bias, which is necessary to obtain the target density, is determined based on densities of the first patch images. In the electrifying bias calculation, toner images are formed as second patch images while changing the electrifying bias with the development bias fixed to the optimal development bias. An optimal electrifying bias, which is necessary to obtain the target density, is determined based on densities of the second patch images.
摘要翻译：以此顺序执行显影偏差计算和通电偏差计算。在显影偏压计算中，在改变显影偏压的同时，形成多个调色剂图像作为第一贴片图像。基于第一贴片图像的密度确定获得目标密度所必需的最佳显影偏差。在通电偏压计算中，调色剂图像形成为第二贴片图像，同时将显影偏压改变为最佳显影偏压的充电偏压。基于第二贴片图像的密度确定获得目标密度所必需的最佳带电偏压。

9. 发明授权

US06341203B1 Image forming apparatus and method with adjustable image density factor 失效
标题翻译：具有可调图像密度因子的图像形成装置和方法
公开(公告)号：US06341203B1
公开(公告)日：2002-01-22
申请号：US09624487
申请日：2000-07-24
申请人： Hiroshi Nakazato , Yoshio Nakazawa , Takashi Hama
发明人： Hiroshi Nakazato , Yoshio Nakazawa , Takashi Hama
IPC分类号： G03G1500
CPC分类号： G03G15/5058 , G03G15/065 , G03G2215/00042 , G03G2215/0174
摘要： In an apparatus, first and second processing modes are prepared to determine an optimal development bias. Either one of the first processing mode and the second processing mode is selected as a processing mode in accordance with an operation status of the apparatus. Hence, it is possible to select and execute the most appropriate processing mode in accordance with an operation status to thereby efficiently and highly accurately determine an optimal value of a development bias which is one density controlling factor.
摘要翻译：在装置中，准备第一和第二处理模式以确定最佳显影偏压。根据装置的操作状态，选择第一处理模式和第二处理模式中的任何一个作为处理模式。因此，可以根据操作状态来选择和执行最合适的处理模式，从而高效且高精度地确定作为一个密度控制因子的显影偏压的最佳值。

10. 发明授权

US06336008B1 Image forming apparatus with adjustable image density and method 失效
标题翻译：具有可调图像浓度和方法的图像形成装置
公开(公告)号：US06336008B1
公开(公告)日：2002-01-01
申请号：US09625055
申请日：2000-07-24
申请人： Hiroshi Nakazato , Takashi Hama
发明人： Hiroshi Nakazato , Takashi Hama
IPC分类号： G03G1500
CPC分类号： G03G15/065 , G03G15/5041 , G03G2215/00042 , G03G2215/0174
摘要： A development bias calculation and an electrifying bias calculation are executed in this order. In the development bias calculation, a plurality of toner images are formed as first patch images while changing the development bias. An optimal development bias, which is necessary to obtain the target density, is determined based on densities of the first patch images. In the electrifying bias calculation, toner images are formed as second patch images while changing the electrifying bias with the development bias fixed to the optimal development bias. An optimal electrifying bias, which is necessary to obtain the target density, is determined based on densities of the second patch images.
摘要翻译：以此顺序执行显影偏差计算和通电偏差计算。在显影偏压计算中，在改变显影偏压的同时，形成多个调色剂图像作为第一贴片图像。基于第一贴片图像的密度确定获得目标密度所必需的最佳显影偏差。在通电偏压计算中，调色剂图像形成为第二贴片图像，同时将显影偏压改变为最佳显影偏压的充电偏压。基于第二贴片图像的密度确定获得目标密度所必需的最佳带电偏压。

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