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1. 发明授权

US06331832B1 Auto-ranging digital densitometer with lookup table 有权
标题翻译：具有查找表的自动量程数字密度计
公开(公告)号：US06331832B1
公开(公告)日：2001-12-18
申请号：US09541923
申请日：2000-04-03
申请人： Allen J. Rushing
发明人： Allen J. Rushing
IPC分类号： H03M118
CPC分类号： H03M1/183 , H03M1/1235
摘要： An auto-ranging digital densitometer, for determining the optical density of a test sample, includes a photodetector and a digital logarithmic converter. Within the logarithmic converter, an amplifier circuit is adapted to produce an output signal proportional to intensity of light incident on the photodetector. The amplifier circuit has multiple gains that successively increase, one to the next, by a ratio between 2.3:1 and 5.7:1. Gain select logic selects the gain to provide good density resolution and avoid amplifier saturation. An analog-to-digital converter is adapted to convert the output signal of the amplifier circuit to digital format. A lookup table address is formed at least in part from the output of the analog-to-digital converter. The lookup table outputs at least the lower-order digits of the density value corresponding to the gain and the amplifier output. Density range is extended, resolution improved, and the requirement for a second lookup table is eliminated. The digital logarithmic converter portion of the densitometer is also applicable to other fields besides densitometry.
摘要翻译：用于确定测试样品的光密度的自动测距数字密度计包括光电检测器和数字对数转换器。在对数转换器内，放大器电路适于产生与入射在光电检测器上的光强度成比例的输出信号。放大器电路具有多个增益，其连续增加一个到下一个2.3:1到5.7:1之间的比例。增益选择逻辑选择增益以提供良好的密度分辨率并避免放大器饱和。模拟 - 数字转换器适于将放大器电路的输出信号转换成数字格式。至少部分地从模数转换器的输出形成查找表地址。查找表至少输出对应于增益和放大器输出的浓度值的低阶数字。密度范围扩大，分辨率提高，并且消除了对第二查找表的要求。密度计的数字对数转换器部分也适用于除光密度测定以外的其它领域。

2. 发明授权

US5235385A Method and apparatus for controlling toner image density 失效
标题翻译：用于控制调色剂图像浓度的方法和装置
公开(公告)号：US5235385A
公开(公告)日：1993-08-10
申请号：US868811
申请日：1992-04-15
申请人： Allen J. Rushing
发明人： Allen J. Rushing
IPC分类号： G03G15/06 , G03G15/08
CPC分类号： G03G15/065 , G03G15/0851
摘要： An apparatus for controlling the transmission density of a layer of pigmented thermoplastic marking particles (e.g., electrographic toner) being deposited on a dielectric film or layer by an electrically biased particle applicator. Such apparatus uses (a) an electrometer for producing a first signal proportional to the level of electrostatic charge on the film after such particles have been applied thereto; (b) a charge-to-mass determining device for producing a second signal proportional to the electrostatic charge-to-mass ratio of the particles applied to the film surface; and (c) a bias voltage controller responsive to the first and second signals for controlling the electrical bias on the particle applicator to control the mass per unit area of the particles applied to the film surface.
摘要翻译：用于控制通过电偏置的颗粒施加器沉积在电介质膜或层上的着色热塑性标记颗粒（例如电摄影调色剂）层的透射密度的装置。这样的装置使用（a）静电计用于在施加了这些颗粒之后产生与膜上的静电电荷水平成比例的第一信号; （b）电荷质量确定装置，用于产生与施加到膜表面的颗粒的静电电荷与质量比成比例的第二信号; 和（c）响应于第一和第二信号的偏置电压控制器，用于控制颗粒施加器上的电偏压，以控制施加到膜表面的颗粒的每单位面积的质量。

3. 发明授权

US4965636A Electrostatographic machine with screening 失效
标题翻译：静电放映机
公开(公告)号：US4965636A
公开(公告)日：1990-10-23
申请号：US352238
申请日：1989-05-15
申请人： Allen J. Rushing , Donald J. Clar, Jr. , Walter B. Sherwood
发明人： Allen J. Rushing , Donald J. Clar, Jr. , Walter B. Sherwood
IPC分类号： G03G15/04
CPC分类号： G03G15/04027
摘要： Each region of a photoconductive member receives an electrostatic charge over a predetermined time period. An electrostatic latent half-tone pattern image is screened on the photoconductive member such that exposure of the photoconductive member to a light pattern of a continuous tone original document will form a half-tone latent image on the photoconductive member. The screened image is formed during the predetermined time period that each region of the photoconductive member is being charged such that the half-tone pattern is partially charged over.
摘要翻译：感光体的每个区域在预定时间段内接收静电电荷。在感光体上屏蔽静电潜色半色调图案图像，使得感光体对于连续色调原稿的光图案的曝光将在感光体上形成半色调潜像。在预定时间段期间形成屏蔽图像，其中感光构件的每个区域被充电，使得半色调图案被部分地充电。

4. 发明授权

US4853738A Color quality improvements for electrophotographic copiers and printers 失效
标题翻译：电子照相复印机和打印机的色彩改善
公开(公告)号：US4853738A
公开(公告)日：1989-08-01
申请号：US189091
申请日：1988-05-02
申请人： Allen J. Rushing
发明人： Allen J. Rushing
IPC分类号： G03G15/01
CPC分类号： G03G15/01
摘要： Disclosed is apparatus and procedure for automatic set up and/or maintenance of process control parameters for good color balance, color fidelity, and tone reproduction by exploiting all of the available process parameter adjustments based on several density measurements in each of a plurality of color separations. Density measurements are made of a plurality of color separations across a range of densities for each color separation. Process control parameter adjustments are calculated utilizing the known average human relative visual sensitivities to density and color shifts at various density levels, to achieve an optimum set up compromise over all the colors. If certain colors or densities are particularly important in the scene of the original document, those colors or densities are more heavily weighted in the adjustment calculations. The adjustment procedure is preferably iterated a few times to attain convergence to the "best" set up.
摘要翻译：公开了通过利用基于多个分色中的每一个中的几个密度测量的所有可用的过程参数调整来自动建立和/或维护过程控制参数以获得良好的色彩平衡，色彩保真度和色调再现的装置和程序。密度测量由用于每种颜色分离的密度范围内的多个分色构成。使用已知的平均人类相对视觉灵敏度来计算过程控制参数调整，以便在各种浓度水平下对密度和颜色偏移进行调整，以达到对所有颜色的最佳设置折衷。如果某些颜色或密度在原始文件的场景中特别重要，则在调整计算中，这些颜色或密度更加重。调整过程优选重复几次以达到“最佳”设置的趋同。

5. 发明授权

US5122835A Compensating densitometer readings for drifts and dusting 失效
标题翻译：补偿密度计读数，用于漂移和除尘
公开(公告)号：US5122835A
公开(公告)日：1992-06-16
申请号：US696381
申请日：1991-05-06
申请人： Allen J. Rushing , Sally L. Stearns , David D. Almeter
发明人： Allen J. Rushing , Sally L. Stearns , David D. Almeter
IPC分类号： G03G15/00
CPC分类号： G03G15/5041 , G03G2215/00042
摘要： Densitometer readings are corrected by obtaining density readings on an untoned area of the interframe region of an image receiver during cycle-up, storing the readings and subtracting the stored readings from subsequent test readings of the same area of the image receiver. Differences between the cycle-up readings and test readings are used to adjust density readings of toned reference patches obtained with the test readings. The procedure can be used during production modes of the machine, with all readings being taken in the interframe regions, or the procedure can be a part of an automatic set-up operation with toned reference patch readings being taken in the image frame areas of the image receiver.
摘要翻译：通过在循环过程中通过在图像接收器的帧间区域的未分配区域上获得密度读数来校正密度计读数，存储读数并从图像接收器的相同区域的后续测试读数中减去存储的读数。循环读数和测试读数之间的差异用于调整用测试读数获得的色调参考斑块的浓度读数。该程序可以在机器的生产模式下使用，其中所有读数都在帧间区域中进行，或者该过程可以是自动设置操作的一部分，其中调色参考斑读数读取在图像帧区域中图像接收器。

6. 发明授权

US4748465A Method and apparatus for controlling charge on a photoconductor 失效
标题翻译：用于控制光电导体上的电荷的方法和装置
公开(公告)号：US4748465A
公开(公告)日：1988-05-31
申请号：US905609
申请日：1986-09-09
申请人： George N. Tsilibes , Allen J. Rushing
发明人： George N. Tsilibes , Allen J. Rushing
IPC分类号： G03G15/02 , G01D15/10
CPC分类号： G03G15/0266 , G03G15/0291
摘要： In an electrophotographic reproduction apparatus and method a corona charger is used for depositing an electrostatic charge of one polarity upon a moving photoconductor prior to making an exposure. In a calibration phase, an electrometer moves across the photoconductor and measures the level of charge at selected locations across the photoconductor to provide data regarding the distribution of charge in a direction of movement. This data is compared with a desired range of values. Where the level of charge is measured at some locations to be outside of the desired range of values, then the level of charge at such locations on the photoconductor is adjusted selectively.
摘要翻译：在电子照相再现装置和方法中，电晕充电器用于在曝光之前在移动的光电导体上沉积一种极性的静电电荷。在校准阶段，静电计横跨光电导体移动，并测量光电导体上选定位置的电荷水平，以提供有关运动方向电荷分布的数据。将该数据与期望的值范围进行比较。在某些位置处测量电荷水平超出所需值范围的情况下，选择性地调节光电导体上这些位置处的电荷水平。

7. 发明授权

US06356360B1 Apparatus and method for rendering halftone dot structures using grey level dots 失效
标题翻译：使用灰度点渲染半色调点结构的装置和方法
公开(公告)号：US06356360B1
公开(公告)日：2002-03-12
申请号：US08990701
申请日：1997-12-16
申请人： Allen J. Rushing , Dongli Yang
发明人： Allen J. Rushing , Dongli Yang
IPC分类号： G06K1502
CPC分类号： H04N1/4057 , H04N1/405 , H04N1/4051
摘要： A method and apparatus of generating rendered image data for use in reproducing an image with a series of patterns of halftone dots. In the method and apparatus an unrendered pixel value of a pixel to be rendered is compared with each of a series of threshold values in accordance with respective comparison criteria and a grey level for a rendered pixel of a halftone dot is generated by having certain threshold values define increasing grey level values of the rendered pixel upon meeting respective criteria and at least one threshold value of the series defines a decrease in grey level value of the rendered pixel for meeting a respective comparison criteria.
摘要翻译：一种生成渲染图像数据的方法和装置，用于使用一系列半色调图案再现图像。在该方法和装置中，根据各自的比较准则将要渲染的像素的未渲染像素值与一系列阈值中的每一个进行比较，并且通过具有某些阈值来生成中间色点的渲染像素的灰度级在满足相应的标准时定义所提取的像素的增加的灰度级值，并且该系列的至少一个阈值定义了用于满足相应的比较标准的渲染像素的灰度级值的减小。

8. 发明授权

US6144024A Digital densitometer using voltage-controlled oscillator, counter, and look-up table 有权
标题翻译：数字密度计采用压控振荡器，计数器和查表
公开(公告)号：US6144024A
公开(公告)日：2000-11-07
申请号：US183509
申请日：1998-10-30
申请人： Allen J. Rushing
发明人： Allen J. Rushing
IPC分类号： G01N21/59 , G01N21/00
CPC分类号： G01N21/5907
摘要： An optical densitometer includes a receiver adapted to produce an electrical output voltage characteristic of an optical density to be measured. A voltage-controlled oscillator produces a periodic signal having an output waveform with a frequency and period characteristic of the output voltage of the receiver. A counter produces a digital value corresponding to the output waveform of the periodic signal produced by the oscillator; and a converter produces a digital optical density signal from the digital value. The counter is adapted to produce its digital value corresponding to the frequency or period of the periodic signal produced by the oscillator. The counter may include a portion adapted to produce a digital value corresponding to the frequency of the periodic signal produced by the oscillator; and a portion adapted to produce its digital value corresponding to the period of the periodic signal produced by the oscillator.
摘要翻译：光密度计包括适于产生要测量的光密度的电输出电压特性的接收器。压控振荡器产生具有输出波形的周期信号，该输出波形具有接收器的输出电压的频率和周期特性。计数器产生对应于由振荡器产生的周期信号的输出波形的数字值; 并且转换器从数字值产生数字光密度信号。计数器适于产生对应于由振荡器产生的周期信号的频率或周期的数字值。计数器可以包括适于产生对应于由振荡器产生的周期信号的频率的数字值的部分; 以及适于产生其对应于由振荡器产生的周期性信号的周期的数字值的部分。

9. 发明授权

US5956544A Electrostatographic reproduction apparatus with electrometer control and method of calibrating the electrometer 失效
标题翻译：具有静电计控制的静电复制设备和校准静电计的方法
公开(公告)号：US5956544A
公开(公告)日：1999-09-21
申请号：US970832
申请日：1997-11-14
申请人： Philip A. Stern , Anne F. Lairmore , Allen J. Rushing
发明人： Philip A. Stern , Anne F. Lairmore , Allen J. Rushing
IPC分类号： G03G15/00 , G01R29/12
CPC分类号： G03G15/5037
摘要： An electrometer probe is used in an electrophotographic apparatus as part of a process control system to measure charge on a photoconductive film belt. This measurement is used to control voltage level or other process parameter of the electrophotographic process. The probe is supported in an electrometer probe holder so that a sensor aperture of the probe is at a fixed distance from the film belt. In order to ensure proper operation of the electrometer probe, a method and an apparatus for independently calibrating the electrometer probe is provided. A curved plate is provided on the electrometer probe holder. The plate is mounted at the same spacing from the probe aperture as the film belt. This plate has a receptacle for the service person's test lead to attach. The other end of the test lead is attached to a test point for the toning station bias supply. The probe may be reoriented on the probe holder to position the probe aperture at the fixed distance to the plate. Using a service test program, different biases are applied to the plate, and the response of the electrometer is monitored. In this way, troubleshooting of electrometer related errors is easily done without the need to remove the electrometer probe to a special test apparatus.
摘要翻译：在电子照相设备中使用静电计探针作为测量感光膜带上的电荷的过程控制系统的一部分。该测量用于控制电子照相过程的电压电平或其他工艺参数。探头支撑在静电计探针支架中，以便探头的传感器孔距胶片带固定距离。为了确保静电计探头的正确操作，提供了用于独立地校准静电计探针的方法和装置。在电位计探针支架上设有弯曲板。该板以与膜带相距的探针孔安装相同的间隔。该板具有用于服务人员测试导线附着的插座。测试线的另一端连接到调色台偏置电源的测试点。探头可以重新定向在探针支架上，以将探针孔定位在距板的固定距离处。使用服务测试程序，对板进行不同的偏差，并监测静电计的响应。以这种方式，可以轻松地进行静电计相关错误的故障排除，无需将静电计探针移除到特殊的测试设备。

10. 发明授权

US5839020A Method and apparatus for controlling production of full productivity accent color image formation 失效
标题翻译：用于控制生产效率的重要颜色图像形成的方法和装置
公开(公告)号：US5839020A
公开(公告)日：1998-11-17
申请号：US799673
申请日：1997-02-11
申请人： Allen J. Rushing , Matthias H. Regelsberger
发明人： Allen J. Rushing , Matthias H. Regelsberger
IPC分类号： G03G15/00
CPC分类号： G03G15/5041 , G03G2215/00037
摘要： A reproduction apparatus and method particularly suited for an electrophotographic DAD-CAD system having an electrostatic recording member for supporting an electrostatic image, a primary charger establishes a primary charge on the member, the primary charge being defined by a parameter V.sub.o. An exposure device imagewise modulates the primary charge to form an electrostatic image on the recording member. The device has an exposure parameter E.sub.o. A developer station develops the electrostatic image with charged toner. The developer station has an electrical bias to establish a field for urging movement of the toner to the member. The electrical bias has an alternating current component parameter AC and a direct current parameter DC. A controller controls adjustments to the parameters E.sub.o, V.sub.o and AC by measuring a density parameter D.sub.OUT of an exposed and developed area on the member that is formed by operation of the primary charger, the exposure device and the developer station. The controller includes a calculator for calculating an error, .DELTA.D.sub.OUT in the measured density parameter from a density setpoint and multiplying .DELTA.D.sub.OUT by respective first, second and third constants to obtain respective adjustment values used for adjusting E.sub.o, V.sub.o and AC and wherein in repeated use of the controller to provide repeated adjustment values used for adjusting E.sub.o, V.sub.o and AC a fixed ratio is maintained between said first, second and third constants. The controller is also suited to providing adjustments to DC using a fourth constant.
摘要翻译：一种特别适用于具有用于支撑静电图像的静电记录元件的电子照相DAD-CAD系统的再现设备和方法，主充电器在该元件上建立主要电荷，主要电荷由参数Vo定义。曝光装置成像调制主要电荷以在记录部件上形成静电图像。该设备具有曝光参数Eo。显影站用带电墨粉显影静电图像。开发者站具有电偏压以建立用于促使调色剂移动到构件的场。电偏压具有交流分量参数AC和直流参数DC。控制器通过测量通过主充电器，曝光装置和显影剂站的操作形成的构件上的暴露和展开区域的密度参数DOUT来控制对参数Eo，Vo和AC的调整。控制器包括用于从密度设定点计算测量密度参数中的误差的DELTA DOUT和通过相应的第一，第二和第三常数乘以DELTA DOUT的计算器，以获得用于调整Eo，Vo和AC的各自的调整值，并且其中在重复在所述第一，第二和第三常数之间保持控制器提供用于调整Eo，Vo和AC的重复调整值的固定比例。控制器也适用于使用第四常数对DC进行调整。

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