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1. 发明申请

US20030038942A1 Densitometer with improved accuracy 审中-公开
标题翻译：密度计，精度提高
公开(公告)号：US20030038942A1
公开(公告)日：2003-02-27
申请号：US09883018
申请日：2001-06-15
申请人： NexPress Solutions LLC
发明人： William A. Hameister , Bradley A. Twait , Richard G. Allen , Matthias H. Regelsberger
IPC分类号： G01N021/55
CPC分类号： G01N21/5907
摘要： A method and apparatus for preventing voltage swings within device outputs from reading output node where swings in excess of certain voltages can harm electronics attached to the output node. Specifically, output swings from devices performing logarithmic operations are prevented from reaching the input of an A/D converter, thereby protecting the A/D converter from the large swings possible in logarithmic outputs. A comparator circuit compares the output from the logarithmic amplifier against a threshold and engages the switching mechanism once the threshold is reached. Once the switching mechanism is engaged it applies a predetermined voltage to the output node in place of the true output voltage from the logarithmic amplifier.
摘要翻译：一种用于防止来自读出输出节点的装置输出内的电压摆幅的方法和装置，其中超过一定电压的摆动可能损害连接到输出节点的电子装置。具体地说，防止来自执行对数运算的装置的输出摆幅达到A / D转换器的输入，从而保护A / D转换器不受对数输出的大幅摆动。比较器电路将对数放大器的输出与阈值进行比较，一旦达到阈值就与开关机构接合。一旦切换机构被接合，则将代替来自对数放大器的真实输出电压的预定电压施加到输出节点。

2. 发明申请

US20030007804A1 Densitometer with improved accuracy for use in color image processing apparatus 有权
标题翻译：密度计具有改进的用于彩色图像处理装置的精度
公开(公告)号：US20030007804A1
公开(公告)日：2003-01-09
申请号：US09882196
申请日：2001-06-15
申请人： NexPress Solutions LLC
发明人： Matthias H. Regelsberger , Richard G. Allen , William A. Hameister , Bradley A. Twait
IPC分类号： G03G015/00
CPC分类号： G01J1/32 , B41J29/393 , G01J1/26 , G01J3/50 , G01J3/501 , G03G15/01 , G03G2215/00042 , G03G2215/00063
摘要： A method and apparatus for a single densitometer design that is used for all colors within multiple color image processing system. The preferred embodiment employs an LED having a light adjustment mechanism for controlling the amount of light received by a light detector in the densitometer. The coarse light adjustment is provided through a variable aperture. Fine light adjustment is accomplished through controlling the current through the LED, either by a potentiometer or through an automated process. Preferably, each of the LEDs is selected by wavelength to maximize the absorption by the colorant yielding light roughly complimentary to the colorant. The adjustment circuit provides advantage in color printing systems by allowing duplicate versions of the same densitometer circuit to yield similar voltage outputs for different colorants, thereby compensating for different absorption characteristics and light output of different colored LEDs.
摘要翻译：用于单个密度计设计的方法和装置，其用于多个彩色图像处理系统内的所有颜色。优选实施例采用具有光调节机构的LED来控制光密度计中的光检测器所接收的光量。通过可变光圈提供粗调光。通过控制通过LED的电流，通过电位器或通过自动化过程来实现精细调光。优选地，通过波长选择每个LED，以最大化着色剂的吸收，产生与着色剂大致互补的光。调整电路通过允许相同密度计电路的重复版本产生不同着色剂的类似电压输出，从而补偿不同颜色的LED的不同吸收特性和光输出，从而在彩色打印系统中提供了优势。

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