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1. 发明公开

EP1120269A8 Bidirectional printing method and apparatus with reduced colour unevenness 有权
标题翻译：在两个方向上具有降低颜色不均的方法和设备用于打印
公开(公告)号：EP1120269A8
公开(公告)日：2001-11-14
申请号：EP01101720
申请日：2001-01-25
申请人： CANON KK
发明人： OTSUKA NAOJI , NISHIKORI HITOSHI , IWASAKI OSAMU , CHIKUMA TOSHIYUKI
IPC分类号： B41J2/205 , B41J2/21 , B41J19/14 , B41J19/18
CPC分类号： B41J2/2132 , B41J2/2125 , B41J19/147
摘要： A printing apparatus for forming a color image by applying different color inks to a printing material while bi-directionally moving the recording head to scan the recording material, the apparatus includes changing means for changing an order of applications of the inks of different colors to be applied at least at one amount for printing a secondary color to a secondary color pixel area; and forming means for forming the secondary color while making the order of applications of the inks to at least one of a plurality of the secondary color pixel areas arranged along a predetermined direction different from the order of another, by the changing means.

2. 发明专利

ES2373518T3 IMPRESORA Y METODO DE IMPRESION. 未知
公开(公告)号：ES2373518T3
公开(公告)日：2012-02-06
申请号：ES09013905
申请日：2000-09-29
申请人： CANON KK
发明人： OTSUKA NAOJI , TAKAHASHI KIICHIRO , NISHIKORI HITOSHI , IWASAKI OSAMU , CHIKUMA TOSHIYUKI
IPC分类号： B41J2/21 , B41J5/30 , B41J2/01 , B41J19/14 , G06K15/10
摘要： Impresora para formar una imagen en color aplicando diferentes tintas de color a un material de impresión utilizando un cabezal de grabación, escaneando bidireccionalmente al mismo tiempo el cabezal de grabación; comprendiendo dicha impresora: medios de escaneado para escanear de forma alternativa dicho cabezal de grabación en una dirección de escaneado; un medio de cambio para cambiar la asignación de los datos para el color secundario a las toberas del cabezal de grabación; medios de formación para formar una imagen proyectando tinta desde dicho cabezal de grabación durante el movimiento de escaneado de avance y retroceso de dicho cabezal de grabación, en donde dichos medios de formación proyectan la tinta para proporcionar el color secundario, según el cambio de asignación mediante dichos medios del cambio; caracterizado porque: dicho medio de cambio puede cambiar la asignación entre una primera asignación en la que las tintas para grabar el color secundario son asignadas a las toberas para grabar los píxeles en un orden predeterminado, y una segunda asignación en la que las tintas para grabar el color secundario son asignadas a las toberas para grabar los píxeles en un orden diferente; y en los píxeles de un color secundario predeterminado, una relación de píxeles entre los píxeles grabados en el orden predeterminado y los píxeles grabados en el orden diferente en el escaneado en la dirección de avance, es sustancialmente igual que la relación en el escaneado en la dirección de retroceso.

3. 发明专利

DE60234000D1 未知
公开(公告)号：DE60234000D1
公开(公告)日：2009-11-26
申请号：DE60234000
申请日：2002-08-13
申请人： CANON KK
发明人： OGURA HIDEKI , OTSUKA NAOJI , INOUE HIROYUKI , ISHINAGA HIROYUKI , KUWABARA NOBUYUKI , OHASHI TETSUYA , INOUE RYOJI
IPC分类号： B41J2/175
摘要： In a structure of an ink tank having a deformable sheet that constitutes the tank and a spring for imparting a negative pressure, unstableness of the negative pressure attributable to the deformation of the sheet as a result of ink consumption is prevented. For this purpose, a plate-like member (109) is joined to a top section of a sheet (106) formed in a convex shape, and a spring member (107) for generating the negative pressure in a tank is mounted to the same member. This makes it possible to maintain a high volume ratio of the ink tank and to achieve stableness of the negative pressure by adequately regulating the deformation of the sheet (106) when the sheet is displaced in the direction of retracting toward the interior of the tank as a result of a reduction of the amount of ink in the tank.

4. 发明专利

DE60043136D1 未知
公开(公告)号：DE60043136D1
公开(公告)日：2009-11-26
申请号：DE60043136
申请日：2000-09-29
申请人： CANON KK
发明人： OTSUKA NAOJI , IWASAKI OSAMU , YAMADA KANEJI , CHIKUMA TOSHIYUKI
IPC分类号： B41J2/21 , B41J2/01 , B41J2/13 , B41J19/14 , H04N1/23
摘要： Two sets of recording heads for applying ink of cyan (C), magenta (M), and yellow (Y) are arranged in symmetry in a scanning direction and orders of colors C and M ejected onto a pixel of a secondary color are set to symmetric orders (C -> M and M -> C). This makes the application orders of ink symmetric in each pixel of secondary color and thus there is no difference between application orders in formation of the pixel by either forward or backward scanning, whereby occurrence of uneven color due to the application orders of ink can be reduced even in execution of two-way color print.

5. 发明专利

DE69941240D1 未知
公开(公告)号：DE69941240D1
公开(公告)日：2009-09-24
申请号：DE69941240
申请日：1999-06-01
申请人： CANON KK
发明人： TAKAHASHI KIICHIRO , OTSUKA NAOJI , NISHIKORI HITOSHI , IWASAKI OSAMU
IPC分类号： G06K15/10 , B41J2/21

6. 发明专利

DE60224859D1 未知
公开(公告)号：DE60224859D1
公开(公告)日：2008-03-20
申请号：DE60224859
申请日：2002-04-29
申请人： CANON KK
发明人： TESHIGAWARA MINORU , OTSUKA NAOJI , TAKAHASHI KIICHIRO , IWASAKI OSAMU
IPC分类号： B41J2/01 , B41J19/14
摘要： A print apparatus that, without significantly reducing an overall printing speed, allows a reduction in uneven densities due to the discharge time difference between black ink and color inks, which occur particularly at both ends in a scanning range and which are caused by the printing by bidirectional scanning of print heads, and enables high image-quality printing to be realized. In this print apparatus, one band is divided into plural areas in a main scanning direction, the dot numbers of black ink and color ink imparted to respective areas are counted. If there are any areas where the dot numbers of both black and color exceed respective threshold values, the area number is counted, and if the number exceeds a predetermined number, the print mode is switched from bidirectional printing to a unidirectional one, upon determining that there is a high probability of occurrence of the above-described uneven densities.

7. 发明专利

DE60220458T2 未知
公开(公告)号：DE60220458T2
公开(公告)日：2008-02-07
申请号：DE60220458
申请日：2002-02-06
申请人： CANON KK
发明人： TAKAHASHI KIICHIRO , OTSUKA NAOJI , SUGIMOTO HITOSHI , NISHIKORI HITOSHI , IWASAKI OSAMU , TESHIGAWARA MINORU , YAZAWA TAKESHI , CHIKUMA TOSHIYUKI
IPC分类号： B41J2/01 , B41J2/21 , B41J2/00 , B41J2/05 , B41J19/14
摘要： The object of the present invention is to provide an ink jet printing apparatus which can realize both a high speed printing and a high quality printing without color deviations when each of the print areas is printed in a plurality of scans by a plurality of print heads ejecting different kinds of ink. For this purse, this invention has a controller (100) for controlling for each print head (1) independently widths and positions of active nozzle groups in the print heads (1), the active nozzle groups representing those of the plurality of nozzles in the print heads (1) which are used for printing, wherein the controller (100) controls the widths and positions of the active nozzle groups according to a set printing condition.

8. 发明专利

DE60222598D1 未知
公开(公告)号：DE60222598D1
公开(公告)日：2007-11-08
申请号：DE60222598
申请日：2002-01-30
申请人： CANON KK
发明人： IWASAKI OSAMU , OTSUKA NAOJI , TAKAHASHI KIICHIRO , TESHIGAWARA MINORU
IPC分类号： B41J2/01 , B41J2/505 , B41J2/485 , B41J2/51 , G06K15/10
摘要： To reduce the number of simultaneously driven printing elements so that the instantaneously flowing current is restricted in a printing system for completing an image by repeating the printing scan a plurality of times in the same printing area while applying random mask thereto. For this purpose, a mask of a predetermined size is structured as a thinning pattern in which data are arranged randomly, the data being for determining whether or not the respective ink ejection openings in a printing head are to be driven when the printing head repeats the scan a plurality of times in the same printing area of a printing medium. When forming an image, the printing elements concerned with the printing operation in the same printing area are divided into a plurality of sections, and the thinning patterns (MASK A to MASK D) complementary to each other are applied to the respective sections during the respective printing scans (S101 to S104).

9. 发明专利

DE602004008535D1 未知
公开(公告)号：DE602004008535D1
公开(公告)日：2007-10-11
申请号：DE602004008535
申请日：2004-06-10
申请人： CANON KK
发明人： IWASAKI OSAMU , TAKAHASHI KIICHIRO , OTSUKA NAOJI , TESHIGAWARA MINORU , EDAMURA TETSUYA , NAKAGAWA YOSHINORI , SEKI SATOSHI
IPC分类号： B41J19/14 , B41J2/21
摘要： In an ink jet printing apparatus using many types of inks to execute bidirectional printing, when symmetrically arranged ejection opening rows c1, m1, y1, y2, m2, and c2 for a cyan, magenta, and yellow inks are used in the print head, one-pass bidirectional printing is executed. On the other hand, if ejection opening rows k1 and k2 for a black ink are used in addition to the above ejection opening rows, multi-pass printing is executed so that there are a number of dots formed with one application order for the black and other color inks and the same number of dots formed with another application order for the black and other color inks. This reduces the non-uniformity of the colors attributed to the difference in application order.

10. 发明专利

DE69934626T2 未知
公开(公告)号：DE69934626T2
公开(公告)日：2007-10-04
申请号：DE69934626
申请日：1999-04-06
申请人： CANON KK
发明人： TAKAHASHI KIICHIRO , OTSUKA NAOJI , NISHIKORI HITOSHI , IWASAKI OSAMU , TESHIGAWARA MINORU , CHIKUMA TOSHIYUKI
IPC分类号： B41J2/01 , B41J2/21 , B41J2/05 , B41J2/505 , B41J2/51 , B41J2/525 , B41J19/14 , B41J29/393
摘要： In a complimentary printing by bi-directional scanning of a head (1) or by a plurality of heads, a plurality of patterns in which a print start timing is shifted by a predetermined amount are printed with respect to a reference dot formed by the forward scan of the bi-directional scanning or by one of the plurality heads (S1). In these patterns, an area factor by the dots formed by printing of the patterns is designed to be varied depending upon shifting amount. An average density is read from each of the plurality of patterns, optically (S2). The timing at which the maximum one among average densities read from the patterns is obtained, can be set as the printing registration condition (S3). Further, before the above reading operation, an optical sensor used for this operation is calibrated, for improving accuracies of the reading and the registrating. By these processings, printing registration between a forward and a reverse scan of a print head or printing registration between a plurality of print heads in a printing apparatus can be performed simply and with high accuracy.

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