JP7087577B2 - Liquid discharge head, device that discharges liquid - Google Patents

Description

The present invention relates to a liquid discharge head and a device for discharging a liquid.

When printing is performed in both directions by reciprocating the liquid discharge head that discharges the liquid in the main scanning direction, the color difference (bidirectional color difference) is caused by the reverse order of the liquid landing order (discharge order) on the outward path and the return path. Occurs.

Conventionally, for example, by having two rows of nozzles per color and arranging them so that the color order is symmetrical with respect to the main scanning direction, the same landing order is suppressed on the outward route and the return route. Is known (Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-96771

By the way, as a liquid discharge head, there is a liquid discharge head in which a plurality of nozzles are arranged in a two-dimensional matrix, and when a liquid discharge head having such a matrix arrangement is used and the number of nozzle rows per color is increased, the entire head becomes full. There is a problem of increasing the size.

The present invention has been made in view of the above problems, and an object of the present invention is to make the bidirectional color difference inconspicuous with a simple head configuration.

In order to solve the above problems, the liquid discharge head according to claim 1 of the present invention is
Nozzles that discharge liquids of multiple colors are lined up parallel to the main scanning direction.
Multiple nozzles that eject liquids of the same color are arranged in a substantially V shape in the sub-scanning direction.
Two nozzles adjacent to each other in the same position in the main scanning direction and adjacent in the sub scanning direction discharge liquids of different colors.
When the liquid is discharged from the nozzle, the liquid is discharged in order from one end of the nozzles arranged in parallel with the main scanning direction.

According to the present invention, the bidirectional color difference can be made inconspicuous with a simple head configuration.

It is a plane explanatory view explaining the nozzle arrangement of the liquid discharge head and the common flow path in 1st Embodiment of this invention. It is also a plan explanatory view explaining the nozzle arrangement. It is explanatory drawing which provides to explain the relationship between the nozzle arrangement of a head and the color order of landing dots in bidirectional printing. It is a plane explanatory view explaining the nozzle arrangement of the liquid discharge head which concerns on 2nd Embodiment of this invention. Similarly, it is explanatory drawing explaining the landing order of each color. It is a plane explanatory view of the main part of an example of the printing apparatus as the apparatus which discharges a liquid which concerns on this invention. It is explanatory drawing of the main part side surface of the printing apparatus. It is a block explanatory drawing of the control part of the printing apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan explanatory view for explaining the nozzle arrangement and the common flow path of the liquid discharge head according to the same embodiment, and FIG. 2 is a plan explanatory view for explaining the nozzle arrangement as well.

The liquid discharge head 1 includes nozzles 11 (11A, 11B) for discharging liquid, a pressure chamber (individual liquid chamber) 21 communicating with the nozzle 11, and an individual supply flow path 22 communicating with the pressure chamber 21.

Then, a plurality of common flow path tributaries 51 (51A, 51B) communicating with the individual supply flow path 22 via the supply port 23, and a common flow path main stream 61 (61A) communicating with the plurality of common flow path tributaries 51 (51A, 51B). , 61B).

The common flow path main stream 61A and the common flow path main stream 61B are arranged on both sides in the main scanning direction (first direction). The common flow path tributary 51A and the common flow path tributary 51B are alternately arranged in the sub-scanning direction (second direction) orthogonal to the main scanning direction. Further, the common flow path tributary 51A and the common flow path tributary 51B have a substantially V-shape in a plan view.

Here, a liquid having a color different from that of the common flow path main stream 61A and the common flow path main stream 61B is supplied. As a result, for example, the liquid of the first color (in this embodiment, the liquid of magenta M) can be discharged from the nozzle 11A through the common flow path tributary 51A. The liquid of the second color (in this embodiment, the liquid of cyan C) can be discharged from the nozzle 11B through the common flow path tributary 51B.

Then, in the liquid discharge head 1, a nozzle 11A (nozzle shown by a black square such as A1 in FIG. 2) for discharging a liquid of a plurality of colors, for example, a magenta (M) liquid as described above, and a cyan (C). Nozzles 11B (nozzles indicated by white squares such as B1 in FIG. 2) for discharging the liquid of the above are arranged side by side in parallel with the main scanning direction (first direction).

Further, the nozzles 11A and 11B are arranged side by side in the sub-scanning direction (second direction) orthogonal to the main scanning direction.

Here, the plurality of nozzles 11A capable of discharging the liquid of the same color are arranged in a substantially V shape in the sub-scanning direction. Similarly, a plurality of nozzles 11B capable of discharging liquids of the same color are also arranged in a substantially V shape in the sub-scanning direction.

That is, the plurality of nozzles 11A capable of ejecting the same color liquid are diagonally arranged diagonally downward to the right in the sub-scanning direction (second direction) and diagonally downward to the left in the sub-scanning direction. It is arranged so as to form a nozzle row 11AR lined up in.

Similarly, the plurality of nozzles 11B capable of discharging liquids of the same color include a nozzle row 11BL that is diagonally arranged diagonally downward to the right in the sub-scanning direction and a nozzle row 11BR that is diagonally aligned downward to the left in the sub-scanning direction. Is arranged to configure.

In this way, the plurality of nozzles that discharge the liquid of the same color are arranged on a straight line that is symmetrical with respect to the main scanning direction. Further, a plurality of nozzles for discharging liquids of the same color are arranged on a straight line diagonally with respect to the main scanning direction and the sub-scanning direction. As a result, a plurality of nozzles that discharge liquids of the same color are arranged in a substantially V-shaped shape.

The nozzle row 11AL in which the nozzles 11A are diagonally arranged downward to the right and the nozzle row 11AR in which the nozzles 11A are diagonally arranged downward to the left are arranged so that the positions of the nozzles 11A are displaced in the sub-scanning direction.

Similarly, the nozzle row BL in which the nozzles 11B are diagonally arranged downward to the right and the nozzle row 11BR in which the nozzles 11B are diagonally arranged downward to the left are arranged so that the positions of the nozzles 11B are displaced in the sub-scanning direction.

Further, when defining the first dot to the second dot from the top dot in the sub-scanning direction, the nozzle 11 forming the odd-numbered dot is arranged in the left side region (nozzle row AL, BL). The nozzles forming the even-numbered dots are arranged in the right region (nozzle row AR, BR).

Further, in the present embodiment, when the maximum number of nozzles arranged in a V shape in the sub-scanning direction (in this example, eight nozzles 11A (A1 to A8)) is one unit NB in the sub-scanning direction, the sub-scanning direction. It is repeatedly arranged in n units (n = integer, n = 3 in this example).

Next, the color difference when bidirectional printing is performed by the liquid ejection head will be described with reference to FIG. FIG. 3 is an explanatory diagram for explaining the relationship between the nozzle arrangement of the head and the color order of the landing dots, which is used in the same explanation.

When printing is performed by moving the liquid discharge head 1 in both directions, the liquid is discharged in order from one end of the nozzles 11 arranged in the main scanning direction.

Therefore, when printing on the outward path, the first dot in the sub-scanning direction lands in the order of nozzles 11B (B1) and nozzles 11A (A1), so that the landing order is C → M. Since the second dot lands in the order of nozzle 11A (A2) and nozzle 11B (B2), the landing order is M → C. Since the third dot is landed in the order of nozzle 11B (B3) and nozzle 11A (A3), the landing order is C → M. Since the fourth dot lands in the order of nozzles 11A (A4) and nozzles 11B (B4), the landing order is M → C. Hereinafter, the same applies to the fifth and subsequent dots.

In this way, when performing outbound printing, in the sub-scanning direction, dots that land in the order of landing in the order of C → M, M → C are repeated for each dot, and the dot spacing is set to a predetermined pitch or less to obtain color. You will not be able to see the difference.

Further, when printing on the return path, the first dot in the sub-scanning direction lands in the order of nozzles 11A (A1) and nozzles 11B (B1), so the landing order is M → C. Since the second dot lands in the order of nozzle 11B (B2) and nozzle 11A (A2), the landing order is C → M. Since the third dot is landed in the order of nozzles 11A (A3) and nozzles 11B (B3), the landing order is M → C. Since the fourth dot is landed in the order of nozzle 11B (B4) and nozzle 11A (A4), the landing order is C → M. Hereinafter, the same applies to the fifth and subsequent dots.

In this way, even when performing return printing, in the sub-scanning direction, dots landing in the order of landing in the order of M → C, C → M are repeated for each dot, and the dot spacing is set to a predetermined pitch or less to obtain color. You will not be able to see the difference.

As a result, even if there is a color difference due to the difference in the landing order between the outward route and the return route, it cannot be visually recognized. By arranging the nozzles that discharge the liquid of the same color in a substantially V shape in the sub-scanning direction, the landing order can be changed for each dot, the head configuration is simple, and the nozzles Drive control is also easy.

Next, the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view for explaining the nozzle arrangement of the liquid discharge head according to the same embodiment, and FIG. 5 is an explanatory view for explaining the landing order of each color.

In the present embodiment, a nozzle 11A (nozzle indicated by a black square such as A1 in FIG. 4) for discharging a liquid of a plurality of colors, for example, a magenta (M) liquid, and a nozzle 11C (nozzle 11C) for discharging a yellow (Y) liquid. In FIG. 4, a nozzle (nozzle indicated by a mesh dot square such as C1) and a nozzle 11B (nozzle indicated by a white square such as B1 in FIG. 4) for discharging a cyan (C) liquid are parallel to the main scanning direction (first direction). They are arranged side by side.

Further, the nozzles 11A, the nozzles 11B and the nozzles 11C are arranged side by side in the sub-scanning direction (second direction) orthogonal to the main scanning direction.

Here, the plurality of nozzles 11A capable of discharging the liquid of the same color are arranged in a substantially V shape in the sub-scanning direction. Similarly, a plurality of nozzles 11B capable of discharging liquids of the same color are also arranged in a substantially V shape in the sub-scanning direction. Similarly, a plurality of nozzles 11C capable of discharging liquids of the same color are also arranged in a substantially V shape in the sub-scanning direction.

That is, the plurality of nozzles 11A capable of ejecting the same color liquid are diagonally arranged diagonally downward to the right in the sub-scanning direction (second direction) and diagonally downward to the left in the sub-scanning direction. It is arranged so as to form a row of nozzles.

Similarly, a plurality of nozzles 11B capable of ejecting liquids of the same color constitute a nozzle array diagonally arranged diagonally downward to the right in the sub-scanning direction and a nozzle array diagonally arranged diagonally downward to the left in the sub-scanning direction with respect to the main scanning direction. Arranged to do.

Similarly, a plurality of nozzles 11C capable of ejecting a liquid of the same color constitute a nozzle array diagonally arranged diagonally downward to the right in the sub-scanning direction and a nozzle array diagonally arranged diagonally downward to the left in the sub-scanning direction with respect to the main scanning direction. Arranged to do.

The nozzle row in which the nozzles 11A are diagonally arranged downward to the right and the nozzle row in which the nozzles 11A are diagonally arranged downward to the left are arranged so that the positions of the nozzles 11A are displaced in the sub-scanning direction.

Similarly, the nozzle row in which the nozzles 11B are diagonally arranged downward to the right and the nozzle row in which the nozzles 11B are diagonally arranged downward to the left are arranged so that the positions of the nozzles 11B are displaced in the sub-scanning direction.

Similarly, the nozzle row in which the nozzles 11C are diagonally arranged downward to the right and the nozzle row in which the nozzles 11C are diagonally arranged downward to the left are arranged so that the positions of the nozzles 11C are displaced in the sub-scanning direction.

When printing is performed by moving the liquid discharge head 1 of the present embodiment in both directions, the liquid is discharged in order from one end of the nozzles 11 arranged in the main scanning direction.

Therefore, as shown in FIG. 5, when the blue B dots are formed by cyan C and magenta M, in the outbound printing, the 4th dot and the 5th dot are in the same landing order from the 1st dot to the 12th dot. Other than that, dots that land in the order of C → M and dots that land in the order of M → C appear alternately.

Similarly, in return printing, dots landing in the order of M → C and landing in the order of C → M, except that the 4th and 5th dots have the same landing order from the 1st dot to the 12th dot. Dots appear alternately.

Similarly, when forming other red R and green G dots, as shown in FIG. 5, the 4th and 5th dots, and the 8th and 9th dots on the outward and inbound routes are in the same landing order. , Dots with the opposite landing order appear alternately.

Therefore, as described above, since the difference in color cannot be visually recognized by setting the dot spacing to a predetermined pitch or less, even if there is a color difference due to the difference in the landing order between the outward route and the return route, it cannot be visually recognized. By arranging the nozzles that discharge the liquid of the same color in a substantially V-shape in the sub-scanning direction, the landing order can be changed for each dot, and the head configuration is simple. Drive control is also easy.

Next, an example of a printing device as a device for discharging a liquid according to the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a plan view of the main part of the device, and FIG. 7 is a side view of the main part of the device.

The printing device 500 is a serial type device, and the carriage 403 is reciprocated in the main scanning direction by the main scanning moving mechanism 493. The main scanning movement mechanism 493 includes a guide member 401, a main scanning motor 405, a timing belt 408, and the like. The guide member 401 is bridged over the left and right side plates 491A and 491B to movably hold the carriage 403. Then, the carriage 403 is reciprocated in the main scanning direction by the main scanning motor 405 via the timing belt 408 bridged between the drive pulley 406 and the driven pulley 407.

The carriage 403 is equipped with a liquid discharge unit 440 in which the liquid discharge head 1 and the head tank 441 according to the present invention are integrated.

The printing apparatus 500 includes a transport mechanism 495 for transporting the sheet material 410. The transport mechanism 495 includes a transport belt 412, which is a transport means, and a sub-scanning motor 416 for driving the transport belt 412.

The transport belt 412 attracts the sheet material 410 and transports it at a position facing the liquid discharge head 1. The transport belt 412 is an endless belt, and is hung between the transport roller 413 and the tension roller 414. Adsorption can be performed by electrostatic adsorption, air suction, or the like.

Then, the transport belt 412 orbits in the sub-scanning direction by rotationally driving the transport roller 413 via the timing belt 417 and the timing pulley 418 by the sub-scanning motor 416.

Further, on one side of the carriage 403 in the main scanning direction, a maintenance / recovery mechanism 420 for maintaining / recovering the liquid discharge head 1 is arranged on the side of the transport belt 412.

The maintenance / recovery mechanism 420 is composed of, for example, a cap member 421 that caps the nozzle surface of the head 1, a wiper member 422 that wipes the nozzle surface, and the like.

The main scanning movement mechanism 493, the maintenance / recovery mechanism 420, and the transport mechanism 495 are attached to a housing including the side plates 491A and 491B and the back plate 491C.

In the printing apparatus 500 configured in this way, the sheet material 410 is fed onto the transport belt 412 and sucked, and the sheet material 410 is conveyed in the sub-scanning direction by the circumferential movement of the conveyor belt 412.

Therefore, by driving the head 1 in response to the image signal while moving the carriage 403 in the main scanning direction, the liquid is discharged to the stopped sheet material 410 to form an image.

Next, the outline of the control unit of the printing apparatus 500 will be described with reference to FIG. FIG. 5 is a block explanatory diagram of the control unit.

The control unit 500 includes a main control unit 500A composed of a CPU 501 that controls the entire device, a ROM 502 that stores fixed data such as various programs including programs executed by the CPU 501, and a RAM 503 that temporarily stores image data and the like. ing.

The control unit 500 includes a rewritable non-volatile memory 504 for holding data even while the power of the device is cut off. The control unit 500 includes an ASIC 505 that processes various signal processing for image data, image processing for sorting, and other input / output signals for controlling the entire device.

The control unit 500 includes a head drive control unit 508 including a data transfer means for driving and controlling the liquid discharge head 1, and a drive IC (here referred to as a “head driver”) 509 for driving the liquid discharge head 1. I have.

The control unit 500 includes a main scanning motor 405 that moves and scans the carriage 403, a sub-scanning motor 416 that orbits the conveyor belt 412, movement of the cap 421 and wiper member 423 of the maintenance and recovery mechanism 420, and suction means connected to the cap 421. It is provided with a motor drive unit 510 for driving the maintenance / recovery motor 556 that drives the motor.

The control unit 500 includes a supply system drive unit 512 that drives a liquid feed pump 454 that feeds a liquid of a required color to the head tank 441.

The control unit 500 has an I / O unit 513. The I / O unit 513 can process various sensor information and acquires information from various sensor groups 515 mounted on the device. Then, the information necessary for controlling the device is extracted and used for controlling the head drive control unit 508 and the motor drive unit 510. The sensor group 515 includes an optical sensor for detecting the position of the sheet material 410, an interlock switch for detecting the opening / closing of the cover, and the like.

An operation panel 514 for inputting and displaying information necessary for this device is connected to the control unit 500.

Here, the control unit 500 has an I / F 506 for sending and receiving data and signals to and from the host side, and is from a printer driver 601 on the host 600 side such as an information processing device such as a personal computer and an image reading device. The required information of the above is received by the I / F 506 via a cable or a network.

Then, the CPU 501 of the control unit 500 reads out and analyzes the print data in the receive buffer included in the I / F 506, performs image processing, data rearrangement processing, and the like necessary for the ASIC 505, and print-controls this image data. Transfer from unit 508 to head driver 509. In order to output an image, the dot pattern data can be generated by the printer driver 601 on the host 600 side or by the control unit 500.

The head drive control unit 508 transfers the image data as serial data, and also transfers the transfer clock, latch signal, and the like necessary for transferring the image data and confirming the transfer to the head driver 509. Further, the head drive control unit 508 selects a plurality of types of drive waveform data stored and held in the ROM 502 and outputs the drive waveform data to the head driver 509.

The head driver 509 discharges liquid based on image data corresponding to one line of the liquid discharge head 1 serially transferred from the head drive control unit 508, drive waveform data transferred from the head drive control unit 508, and the like. The liquid discharge head 1 is driven by generating and outputting a discharge drive waveform for each pressure generating means (for example, a piezoelectric element) of the head 1.

In the present application, the liquid to be discharged may have a viscosity and surface tension that can be discharged from the head, and is not particularly limited, but the viscosity becomes 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. It is preferable that it is a thing. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, such as inks for inkjets, surface treatment liquids, components of electronic and light emitting elements, and formation of electronic circuit resist patterns. It can be used in applications such as liquids and material liquids for three-dimensional modeling.

Piezoelectric actuators (laminated piezoelectric elements and thin-film piezoelectric elements), thermal actuators that use electric heat conversion elements such as heat-generating resistors, and electrostatic actuators that consist of a vibrating plate and counter electrodes are used as energy sources for discharging liquid. Includes what to do.

The "liquid discharge unit" is a liquid discharge head integrated with functional parts and a mechanism, and includes a collection of parts related to liquid discharge. For example, the "liquid discharge unit" includes a head tank, a carriage, a supply mechanism, a maintenance / recovery mechanism, a main scanning movement mechanism, a liquid circulation device in which at least one of the configurations is combined with a liquid discharge head, and the like.

Here, the term "integration" means, for example, a liquid discharge head and a functional component, a mechanism in which the mechanism is fixed to each other by fastening, bonding, engagement, etc., or one in which one is movably held with respect to the other. include. Further, the liquid discharge head, the functional component, and the mechanism may be configured to be detachable from each other.

For example, as a liquid discharge unit, there is a unit in which a liquid discharge head and a head tank are integrated. In some cases, the liquid discharge head and the head tank are integrated by being connected to each other by a tube or the like. Here, a unit including a filter can be added between the head tank of these liquid discharge units and the liquid discharge head.

Further, as a liquid discharge unit, there is a unit in which a liquid discharge head and a carriage are integrated.

Further, there is a liquid discharge unit in which the liquid discharge head and the scanning movement mechanism are integrated by holding the liquid discharge head movably by a guide member constituting a part of the scanning movement mechanism. In some cases, the liquid discharge head, the carriage, and the main scanning movement mechanism are integrated.

Further, as a liquid discharge unit, there is a carriage to which a liquid discharge head is attached, in which a cap member which is a part of the maintenance / recovery mechanism is fixed, and the liquid discharge head, the carriage, and the maintenance / recovery mechanism are integrated. ..

Further, as a liquid discharge unit, there is a liquid discharge unit in which a tube is connected to a head tank or a liquid discharge head to which a flow path component is attached, and the liquid discharge head and a supply mechanism are integrated. The liquid of the liquid storage source is supplied to the liquid discharge head through this tube.

The main scanning movement mechanism shall include a single guide member. Further, the supply mechanism includes a single tube and a single loading unit.

Although the "liquid discharge unit" is described here in combination with the liquid discharge head, the "liquid discharge unit" includes the above-mentioned head module or head unit including the liquid discharge head and the functions as described above. It also includes integrated parts and mechanisms.

The "device for discharging a liquid" includes a device including a liquid discharge head, a liquid discharge unit, a head module, a head unit, and the like, and driving the liquid discharge head to discharge the liquid. The device for discharging a liquid includes not only a device capable of discharging a liquid to a device to which the liquid can adhere, but also a device for discharging the liquid into the air or into the liquid.

The "device for discharging the liquid" may include means for feeding, transporting, and discharging paper to which the liquid can adhere, as well as a pretreatment device, a posttreatment device, and the like.

For example, as a "device that ejects a liquid", an image forming device that is a device that ejects ink to form an image on paper, and a three-dimensional model (three-dimensional model) are formed in layers in order to form a three-dimensional model. There is a three-dimensional modeling device (three-dimensional modeling device) that discharges the modeling liquid into the powder layer.

Further, the "device for discharging a liquid" is not limited to a device in which a significant image such as characters and figures is visualized by the discharged liquid. For example, those that form patterns that have no meaning in themselves and those that form a three-dimensional image are also included.

The above-mentioned "thing to which a liquid can adhere" means a material to which a liquid can adhere at least temporarily, such as a material to which the liquid adheres and adheres, and a material to which the liquid adheres and permeates. Specific examples include media such as paper, recording paper, recording paper, film, cloth and other recording media, electronic substrates, electronic components such as piezoelectric elements, powder layers (powder layers), organ models, and inspection cells. Yes, and includes everything to which the liquid adheres, unless otherwise specified.

The material of the above-mentioned "material to which a liquid can adhere" may be paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics or the like as long as the liquid can adhere even temporarily.

Further, the "device for discharging the liquid" includes, but is not limited to, a device in which the liquid discharge head and the device to which the liquid can adhere move relatively. Specific examples include a serial type device that moves the liquid discharge head, a line type device that does not move the liquid discharge head, and the like.

In addition, as a "device for ejecting a liquid", a treatment liquid coating device for ejecting a treatment liquid to the paper in order to apply the treatment liquid to the surface of the paper for the purpose of modifying the surface of the paper, etc. There is an injection granulator that granulates fine particles of the raw material by injecting a composition liquid in which the raw material is dispersed in the solution through a nozzle.

In addition, in the term of this application, image formation, recording, printing, printing, printing, modeling, etc. are all synonymous.

1 Liquid discharge head 11, 11A to 11C Nozzle 21 Pressure chamber 22 Supply flow path 23 Supply port 51A, 51B Common flow path tributary 61A, 61B Common flow path main flow 403 Carriage 440 Liquid discharge unit 500 Printing device (device that discharges liquid)

Claims (4)

Nozzles that discharge liquids of multiple colors are lined up parallel to the main scanning direction.
Multiple nozzles that eject liquids of the same color are arranged in a substantially V shape in the sub-scanning direction.
Two nozzles adjacent to each other in the same position in the main scanning direction and adjacent in the sub scanning direction discharge liquids of different colors.
A liquid discharge head characterized in that when liquid is discharged from the nozzle, the liquid is sequentially discharged from one end of the nozzles arranged in parallel with the main scanning direction. Nozzles that discharge liquids of multiple colors are arranged side by side in the main scanning direction.
A plurality of nozzles that eject liquids of the same color constitute a row of nozzles that are diagonally arranged diagonally downward to the right in the sub-scanning direction and a row of nozzles that are diagonally aligned downward to the left in the sub-scanning direction with respect to the main scanning direction. Arranged like
Two nozzles adjacent to each other in the same position in the main scanning direction and adjacent in the sub scanning direction discharge liquids of different colors.
The liquid discharge head is characterized in that the nozzles lined up in a downward-sloping manner and the nozzles arranged in a downward-sloping manner are arranged so as to be displaced from each other in the sub-scanning direction. Multiple common channel tributaries that supply the liquid corresponding to the nozzle,
It has a common flow path main stream leading to the plurality of common flow path tributaries, and has.
The liquid discharge head according to claim 1 or 2 , wherein the common flow path tributaries corresponding to each of the plurality of colors are alternately arranged in the sub-scanning direction. A carriage that can move back and forth in the main scanning direction,
The liquid discharge head according to any one of claims 1 to 3 mounted on the carriage.
When the carriage is moved in both directions to discharge the liquid from the liquid discharge head, the liquid is discharged from the nozzle on the tip side in the moving direction of the plurality of nozzles arranged in the main scanning direction of the liquid discharge head. A device that discharges a liquid.

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