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    Method and apparatus for printing
    21.
    发明授权
    Method and apparatus for printing 失效
    打印方法和装置

    公开(公告)号：US5926191A

    公开(公告)日：1999-07-20

    申请号：US961215

    申请日：1997-10-30

    申请人： Daigoro Kanematsu ,  Naoji Otsuka ,  Kentaro Yano ,  Kiichiro Takahashi ,  Hitoshi Nishikori ,  Osamu Iwasaki ,  Hidehiko Kanda

    发明人： Daigoro Kanematsu ,  Naoji Otsuka ,  Kentaro Yano ,  Kiichiro Takahashi ,  Hitoshi Nishikori ,  Osamu Iwasaki ,  Hidehiko Kanda

    IPC分类号： B41J2/01 ,  B41J2/05 ,  B41J2/14 ,  B41J2/145 ,  B41J2/205 ,  B41J2/21 ,  B41M5/00 ,  C09D11/00 ,  C09D11/30 ,  C09D11/40 ,  H04N1/40

    CPC分类号： H04N1/40087 ,  B41J2/2056 ,  B41J2/2107

    摘要： In the case of printing in three-value level utilizing two kinds of inks mutually different densities for one color (higher and lower density inks), it is assumed that a reflection density of a region having a predetermined area when solid print is performed only by the lower density ink, and that when solid print is performed only by the higher density ink are expressed ODt and ODn, respectively. Since the granular appearance of the ink dots is expressed in terms of reflection density of one dot, the granular appearance of a lower density ink dot at a portion of image formed only by the lower density ink dots and the granular appearance of a higher density ink dot at a portion of image formed by the higher and lower density ink dots are expressed in terms of values of ODt and (ODn-ODt) divided by the number of pixels included the above region, respectively. Accordingly, by making the reflection density ODt to be approximately one half of the reflection density ODn, the granular appearance produced by the lower density ink dot at the highlighted portion and the granular appearance produced by the higher density ink dot at the portion where the higher density ink dots scattered in the lower density ink dots can be made substantially equal to each other. For this purpose, it is preferable that a dye concentration of the lower density ink is to be about one fourth of that of the higher density ink.

    摘要翻译： 在使用两种不同浓度的油墨（高浓度和低浓度油墨）的三值油墨印刷的情况下，假设仅在实施印刷时由具有预定区域的区域的反射浓度 较低密度的墨水以及仅通过较高密度墨水进行固体印刷时分别表示为ODt和ODn。 由于墨点的粒状外观以一点的反射密度表示，所以在仅由较低密度墨点形成的图像部分处的较低密度墨点的粒状外观和较高密度墨水的粒状外观 通过高密度和低密度墨点形成的图像的一部分，分别以除了上述区域的像素数除以ODt和（ODn-ODt）的值表示。 因此，通过使反射密度ODt为反射密度ODn的大约一半，由突出部分的低密度墨点产生的粒状外观和高密度墨点在较高密度墨点处产生的粒状外观 可以将分散在较低密度墨点中的密度墨点基本上彼此相等。 为此，较低浓度油墨的染料浓度优选为较高浓度油墨的浓度的约四分之一。

    Data recording using randomized variations to prevent visual artifacts due to non-uniformities in a printing apparatus
    29.
    发明授权
    Data recording using randomized variations to prevent visual artifacts due to non-uniformities in a printing apparatus 失效
    使用随机变化的数据记录，以防止由于打印设备中的不均匀性引起的视觉伪影

    公开(公告)号：US5914731A

    公开(公告)日：1999-06-22

    申请号：US311551

    申请日：1994-09-23

    申请人： Kentaro Yano ,  Naoji Otsuka ,  Atsushi Arai ,  Kiichiro Takahashi ,  Osamu Iwasaki ,  Daigoro Kanematsu

    发明人： Kentaro Yano ,  Naoji Otsuka ,  Atsushi Arai ,  Kiichiro Takahashi ,  Osamu Iwasaki ,  Daigoro Kanematsu

    IPC分类号： H04N1/405 ,  B41J29/38 ,  B41J2/205

    CPC分类号： H04N1/4057 ,  B41J2/2128

    摘要： A column band pattern memory (10) stores six different column band patterns "SML, SLM, MSL, MLS, LSM, and LMS" obtained by re-arranging three different area modulation ranks (L, M, and S). A column band pattern generator (12) irregularly selects one of the column band patterns stored in the column band pattern memory (10) on the basis of a numerical value generated by a random number generator (11). The selected column band pattern is input to a dot area determination unit (13), and dot areas in units of columns are determined on the basis of the order of dot area modulation ranks (e.g., the order of S, M, and L) in the selected column band pattern. A pulse controller (14) performs pulse control to form dots in accordance with the dot areas determined by the dot area determination unit (13).

    摘要翻译： 列频带图案存储器（10）存储通过重新布置三个不同的区域调制等级（L，M和S）获得的六个不同的列频带图案“SML，SLM，MSL，MLS，LSM和LMS”。 列频带图案生成器（12）基于由随机数发生器（11）生成的数值，不规则地选择存储在列频带图案存储器（10）中的列频带模式之一。 选择的列带图案被输入到点区域确定单元（13），并且以点面积调制等级的顺序（例如，S，M和L的顺序）来确定以列为单位的点区域， 在所选的列带图案中。 脉冲控制器（14）根据由点区域确定单元（13）确定的点区域进行脉冲控制以形成点。