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    • 4. 发明授权
    • Method and apparatus for printing
    • 打印方法和装置
    • US6145962A
    • 2000-11-14
    • US311878
    • 1999-05-14
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • B41J2/01B41J2/05B41J2/14B41J2/145B41J2/205B41J2/21B41M5/00C09D11/00C09D11/30C09D11/40H04N1/40
    • H04N1/40087B41J2/2056B41J2/2107
    • 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 in 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.
    • 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,以ODt和(ODn-ODt)的值分别除以上述区域中包括的像素数来表示。 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。
    • 5. 发明授权
    • Method and apparatus for printing
    • 打印方法和装置
    • US5926191A
    • 1999-07-20
    • US961215
    • 1997-10-30
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • Daigoro KanematsuNaoji OtsukaKentaro YanoKiichiro TakahashiHitoshi NishikoriOsamu IwasakiHidehiko Kanda
    • B41J2/01B41J2/05B41J2/14B41J2/145B41J2/205B41J2/21B41M5/00C09D11/00C09D11/30C09D11/40H04N1/40
    • H04N1/40087B41J2/2056B41J2/2107
    • 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.
    • 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。
    • 10. 发明授权
    • Adjustment method of dot printing positions and a printing apparatus
    • 点印位置的调整方法和打印装置
    • US06532026B2
    • 2003-03-11
    • US09285792
    • 1999-04-05
    • Kiichiro TakahashiNaoji OtsukaHitoshi NishikoriOsamu IwasakiMinoru TeshigawaraToshiyuki Chikuma
    • Kiichiro TakahashiNaoji OtsukaHitoshi NishikoriOsamu IwasakiMinoru TeshigawaraToshiyuki Chikuma
    • B41J215
    • B41J19/145
    • In complementarily printing by bi-directional scannings of a head or by a plurality of print heads, first patterns and second patterns including reference dots for example, dots formed by a forward scan of the bi-directional scannings or by one of the plurality of print heads and dots each having the different direction of shifting of relative printing positions to the reference dots are printed in corresponding to the plurality of shifting amounts. These first and second patterns have the similar characteristics of a change in density. The difference is only that their characteristics in density change are inverted according to the direction of shifting. The intersection point of these two characteristics in density change is obtained as a position for adjustment where dot-formed positions match. This makes it easy to perform printing registration in a printing apparatus in the case of printing by a forward and reverse scan of a printing head or in the case of printing by means of a plurality of printing heads. In this case, operations by a user etc. are also unnecessary and are easily performed.
    • 在通过头部或多个打印头的双向扫描的互补打印中,包括参考点的第一图案和第二图案,例如通过双向扫描的正向扫描形成的点或由多个打印头中的一个打印 对应于多个移动量,印刷各自具有相对打印位置相对于参考点的不同移动方向的头和点。 这些第一和第二图案具有与密度变化相似的特征。 不同之处在于它们的密度变化特性根据转移方向而反转。 获得这两个特征密度变化的交点作为点形位置匹配的调整位置。 这使得在通过打印头的正向和反向扫描进行打印的情况下或者通过多个打印头进行打印的情况下,可以容易地在打印装置中进行打印配准。 在这种情况下,用户等的操作也是不必要的,并且容易执行。