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1. 发明申请

US20020154321A1 Multiple-level printhead using embedded high speed serial data and control link with on-board exposure clock generation 有权
标题翻译：多级打印头使用嵌入式高速串行数据和控制链路，具有板载曝光时钟生成
公开(公告)号：US20020154321A1
公开(公告)日：2002-10-24
申请号：US09794693
申请日：2001-02-27
申请人： NexPress Solutions LLC
发明人： Hieu T. Pham , Yee S. Ng , Shawn E. O'Hara , William L. Chapman
IPC分类号： G06F015/00
CPC分类号： H04N1/4056 , H04N1/40031
摘要： A product and process for an LED printhead used in electrophotographic printing that generates an exposure clock on the printhead for the LEDs. The present invention provides a high-speed interface that transmits print data that has been modified, or corrected, using the corresponding unique printhead brightness data as the base reference source data to the printhead boards. The corrected print data is then applied to the LED drivers that expose each LED simultaneously and uniquely. A non-linear clock is applied to the LED drivers as the reference clock to create the unique LED on time circuit. An Exposure RAM stores the data as parallel 8-bit data. A LATCH code received at an ASIC converts the Exposure RAM data into a serial bit stream. The preferred embodiment employs a 60 MHz clock, however, it should be readily apparent that numerous other clocking speeds can be employed. From this a linear or non-linear clock stream is created allowing 256 unique (linear or non-linear) exposure on times to the printhead driver circuitry. This is accomplished with a non-linear clock stream which allows a unique period for each clock period which then allows each increment of exposure time to be unique.
摘要翻译：用于电子照相印刷中的LED打印头的产品和工艺，其在LED的打印头上产生曝光时钟。本发明提供了一种高速接口，其使用相应的唯一打印头亮度数据作为基准参考源数据将已被修改或校正的打印数据传送到打印头板。然后将校正的打印数据应用于同时且唯一地暴露每个LED的LED驱动器。将非线性时钟作为参考时钟应用于LED驱动器，以创建独特的LED on time circuit。曝光RAM将数据存储为并行8位数据。在ASIC处接收的LATCH代码将Exposure RAM数据转换为串行位流。优选实施例采用60MHz时钟，然而，应当容易地明白，可以采用许多其它计时速度。由此可创建线性或非线性时钟流，允许256次对打印头驱动器电路的独特（线性或非线性）曝光。这是通过非线性时钟流实现的，其允许每个时钟周期的唯一周期，然后允许曝光时间的每个增量是唯一的。

2. 发明申请

US20020191068A1 Coarse and fine electronic bow correction for a writer 有权
标题翻译：作者的粗略和精细的电子弓校正
公开(公告)号：US20020191068A1
公开(公告)日：2002-12-19
申请号：US09870305
申请日：2001-05-30
申请人： NexPress Solutions LLC
发明人： Shawn E. O'Hara , William L. Chapman , Yee S. Ng
IPC分类号： B41J002/435
CPC分类号： G06K15/1247
摘要： A method and apparatus for increasing the linearity of elements within a printhead by applying a coarse electronic adjustment to rearrange the electronic printing of data into the proper pixel line and then applying a fine electronic adjustment to reduce the bow error to fraction of a pixel line. Delays of exposure control signals are used by the fine electronic adjustment to correct linearity by a fraction of a pixel line. The delays can be repeated to multiply the number of delays available and increase the linearity resolution. The delays can also be averaged between odd and even rows of elements to increase apparent resolution. The first embodiment employs digital circuitry to provide the fine adjustment of pixel data that is partially located on the interface board and partially located on the printhead substrate. This reduces the amount of circuitry placed within the ASICs on the printhead substrate. The fine adjustment circuitry of first embodiment provides multiple signals on a single circuit trace between the interface board and the printhead substrate, where each of the multiple signals is active at different times. The second embodiment places all the fine electronic adjustment onto the ASICs within the printhead substrate resulting in fewer interconnects between the interface board and the printhead substrate than the first embodiment.
摘要翻译：一种用于通过应用粗略的电子调整来将数据的电子打印重新排列到适当的像素线中，然后应用精细的电子调整以将弓形误差减小到像素线的分数来增加打印头内的元件线性的方法和装置。曝光控制信号的延迟通过精细电子调整来使用像素线的一部分来校正线性度。可以重复延迟以乘以可用延迟的数量并增加线性度分辨率。也可以在奇数行和偶数行之间对延迟进行平均以增加表观分辨率。第一实施例采用数字电路来提供部分位于接口板上且部分位于打印头基板上的像素数据的精细调整。这减少了放置在打印头基板上的ASIC内的电路的数量。第一实施例的微调电路在接口板和打印头基板之间的单个电路迹线上提供多个信号，其中多个信号中的每一个在不同时间处于活动状态。第二实施例将所有精细电子调整放置在打印头基板内的ASIC上，导致接口板和打印头基板之间的互连比第一实施例更少。

3. 发明申请

US20030234855A1 Image width correction for led printhead 失效
标题翻译： LED打印头的图像宽度校正
公开(公告)号：US20030234855A1
公开(公告)日：2003-12-25
申请号：US10174801
申请日：2002-06-19
申请人： NexPress Solutions LLC
发明人： Yee S. Ng
IPC分类号： B41J002/45
CPC分类号： B41J2/45
摘要： A method and apparatus for correcting pixel inaccuracies in a writing device having a linear array elements wherein a mechanism to control temperature within a predetermined portion of the writing device is used to correct placement inaccuracies by first determining the inaccuracies with respect to a reference point and then adjusting the temperature within the predetermined portion of the writing device.
摘要翻译：一种用于校正具有线性阵列元件的写入装置中的像素不准确性的方法和装置，其中通过首先确定相对于参考点的不准确性，将用于控制写入装置的预定部分内的温度的机构用于校正放置不准确，然后调节写入装置的预定部分内的温度。

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