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    Method and apparatus for thermal ink jet drop volume control using variable prepulses
    1.
    发明授权
    Method and apparatus for thermal ink jet drop volume control using variable prepulses 有权
    使用可变预脉冲进行热喷墨滴流量控制的方法和装置

    公开(公告)号：US06698862B1

    公开(公告)日：2004-03-02

    申请号：US10248407

    申请日：2003-01-16

    申请人： Yungran Choi ,  Dale Ims ,  Narayan Deshpende ,  Juan Becerra

    发明人： Yungran Choi ,  Dale Ims ,  Narayan Deshpende ,  Juan Becerra

    IPC分类号： B41J2938

    CPC分类号： B41J2/04528 ,  B41J2/04541 ,  B41J2/04563 ,  B41J2/04573 ,  B41J2/0458 ,  B41J2/04598

    摘要： A method and apparatus are providing for extending the drop volume control of a thermal ink jet print head. The print head has a plurality of drop ejectors, each of the plurality of drop ejectors has a heating element actuatable in response to input signals to eject an ink droplet from the print head. The method includes the steps of applying a plurality of print signals to the print head, the plurality of print signals corresponding to an image for the ink jet assembly to create, applying at least one pulse signal to the print head, and sequentially using the at least one pulse signal and the plurality of print signals to activate the heating elements so that the change in current remains small. In addition, the apparatus has a print data storage element that receives print data from a printer controller, a pulse data delay element that receives pulse data from either a print head controller or a previous drop ejector and sends the pulse data to a next drop ejector after a predetermined delay, a heating element and a checksum element that, when the data storage element contains print data, and the pulse data delay element contains pulse data, activates the heating element according to the print data and the pulse data.

    摘要翻译： 一种方法和装置提供用于延长热喷墨打印头的液滴体积控制。 所述打印头具有多个液滴喷射器，所述多个液滴喷射器中的每一个具有响应于输入信号而致动的加热元件，以从所述打印头喷射墨滴。 该方法包括以下步骤：向打印头施加多个打印信号，多个打印信号对应于用于喷墨组件的图像，以产生至少一个脉冲信号到打印头，并且依次使用at 至少一个脉冲信号和多个打印信号以激活加热元件，使得电流的变化保持较小。 此外，该装置具有从打印机控制器接收打印数据的打印数据存储元件，从打印头控制器或先前的液滴喷射器接收脉冲数据的脉冲数据延迟元件，并将脉冲数据发送到下一个滴液喷射器 在预定延迟之后，加热元件和校验和元件，当数据存储元件包含打印数据并且脉冲数据延迟元件包含脉冲数据时，根据打印数据和脉冲数据激活加热元件。

    Method and system for performing multi-pixel parallel error diffusion enabling high-speed diffusion processing without increasing the system clock rate
    3.
    发明授权
    Method and system for performing multi-pixel parallel error diffusion enabling high-speed diffusion processing without increasing the system clock rate 有权
    用于执行多像素并行误差扩散的方法和系统，实现高速扩散处理，而不增加系统时钟速率

    公开(公告)号：US07480078B2

    公开(公告)日：2009-01-20

    申请号：US11116894

    申请日：2005-04-28

    申请人： Yungran Choi ,  Xing Li ,  Daniel A. Mohabir

    发明人： Yungran Choi ,  Xing Li ,  Daniel A. Mohabir

    IPC分类号： H04N1/40

    CPC分类号： H04N1/4052

    摘要： A method and system for performing error diffusion are disclosed. An ordered set of pixels, including a pixel intensity value for each pixel, is received. Each pixel intensity value includes a value within a range from a low value to a high value, inclusive. An initial error value is also received. Based on the pixel intensity values and the initial error value, a pixel value for each pixel and an updated error value are computed substantially simultaneously with each other.

    摘要翻译： 公开了一种用于执行误差扩散的方法和系统。 接收包括每个像素的像素强度值的有序的像素集合。 每个像素强度值包括从低值到高值的范围内的值（包括端值）。 也接收到初始错误值。 基于像素强度值和初始误差值，基本上彼此同时地计算每个像素的像素值和更新的误差值。

    Scaling methods for binary image data
    4.
    发明申请
    Scaling methods for binary image data 审中-公开
    二进制图像数据的缩放方法

    公开(公告)号：US20080266580A1

    公开(公告)日：2008-10-30

    申请号：US11790185

    申请日：2007-04-24

    申请人： Yungran Choi ,  Peter McCandlish ,  Clara Cuciurean-Zapan ,  Ramesh Nagarajan

    发明人： Yungran Choi ,  Peter McCandlish ,  Clara Cuciurean-Zapan ,  Ramesh Nagarajan

    IPC分类号： G06F15/00

    CPC分类号： G06T3/40

    摘要： The embodiments describe calculating and store scaling information based on processing input binary image data. By manipulating data that is received in binary format, the most cost effective method for scaling may be chosen. The input image data is scanned, a resolution (e.g., for display or output) is determined and a scaling method is determined. If the input binary image data needs to be scaled down to a smaller resolution, the binary image data is processed and scaled and then converted to grayscale image data. If the image data must be scaled to a larger resolution, the input binary image data is first converted to grayscale image data before processing using a segmentation tag-based scaling method. The scaled image data may then be output to an output device, such as a display, printer, or image output terminal.

    摘要翻译： 实施例描述了基于处理输入的二进制图像数据来计算和存储缩放信息。 通过操纵以二进制格式接收的数据，可以选择最具成本效益的缩放方法。 扫描输入图像数据，确定分辨率（例如，用于显示或输出），并且确定缩放方法。 如果输入的二进制图像数据需要缩小到更小的分辨率，则处理和缩放二进制图像数据，然后将其转换为灰度图像数据。 如果图像数据必须缩放到更大的分辨率，则在使用基于分段标签的缩放方法处理之前，首先将输入的二进制图像数据转换为灰度图像数据。 然后，缩放的图像数据可以被输出到输出设备，诸如显示器，打印机或图像输出端子。

    Method and system for error diffusion
    5.
    发明申请
    Method and system for error diffusion 有权
    误差扩散的方法和系统

    公开(公告)号：US20060245000A1

    公开(公告)日：2006-11-02

    申请号：US11116894

    申请日：2005-04-28

    申请人： Yungran Choi ,  Xing Li ,  Daniel Mohabir

    发明人： Yungran Choi ,  Xing Li ,  Daniel Mohabir

    IPC分类号： H04N1/40

    CPC分类号： H04N1/4052

    摘要： A method and system for performing error diffusion are disclosed. An ordered set of pixels, including a pixel intensity value for each pixel, is received. Each pixel intensity value includes a value within a range from a low value to a high value, inclusive. An initial error value is also received. Based on the pixel intensity values and the initial error value, a pixel value for each pixel and an updated error value are computed substantially simultaneously with each other.

    摘要翻译： 公开了一种用于执行误差扩散的方法和系统。 接收包括每个像素的像素强度值的有序的像素集合。 每个像素强度值包括从低值到高值的范围内的值（包括端值）。 也接收到初始错误值。 基于像素强度值和初始误差值，基本上彼此同时地计算每个像素的像素值和更新的误差值。