CN1420020A - Accumulative inkjet printing head and its ink supply method - Google Patents

Abstract

The invention provides an ink jet print head and an ink supply method thereof. The printing head comprises a substrate, a nozzle layer and a plurality of bubble generating components. A plurality of first fluid cavities and a plurality of second fluid cavities are formed between the nozzle layer and the upper surface of the substrate. A central ink channel and an edge ink channel are formed in the substrate for delivering ink to the plurality of fluid chambers. The invention is characterized in that the central ink flow channel and the edge ink flow channel are simultaneously arranged on the substrate so as to increase the number of nozzles in unit area on the ink-jet printing head.

Description

Accumulative inkjet printing head and its ink supply method

Technical field

The present invention relates to a kind of ink jet printhead (ink jet printhead) and ink supply method thereof, relate in particular to a kind of including a two-directional (two-directional) central ink channel for sending ink and a one-way (one-directional) Inkjet printing head with high nozzle density and ink supply method for edge ink flow path dedicated to ink delivery.

Background technique

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a conventional inkjet print head 10 . The structure of the inkjet print head 10 is disclosed in US Pat. No. 4,680,859 and US Pat. No. 4,683,481. The inkjet print head 10 includes an ink flow channel 12 formed in the center of a substrate (Substrate) 14, wherein the ink flow channel 12 can be formed in the substrate 14 by sandblasting, laser cutting or etching, and the ink flow channel 12 is located on the surface of the substrate 14. Both sides of the runner 12 are respectively provided with two rows of heating resistors 16 for generating air bubbles, and a nozzle layer 18 is arranged on the substrate 14, and the nozzle layer 18 is formed with a plurality of nozzles (Nozzles) 22, and each nozzle 22 All correspond to a heating resistor 16 . The ink supply mode of the inkjet printhead 10 is to supply (Central feed) ink to the ink chamber (Chambers) 24 between the nozzle layer 18 and the substrate 14 by the central ink channel 12, so that the heating resistor 16 heats the ink chamber 24 The ink in the nozzle is used to generate air bubbles, and then the ink droplets 26 are pushed out from the nozzles 22 .

Please refer to FIG. 2 , which is a schematic structural diagram of another conventional inkjet print head 30 . Inkjet print head 30 is disclosed in US Pat. The two auxiliary ink channels 34 branch out to supply ink to the plurality of ink chambers 36 arranged in two rows on the substrate 33 . Wherein, each ink chamber 36 corresponds to a heating resistor 38 . The heating resistor 38 is also used to heat the ink in the ink chamber 36, so that the ink in the ink chamber 36 is ejected to form ink droplets 42, so the ink supply mode of the ink printing head 30 is to supply (Edge feed) ink at the edges of both sides. Ink is supplied to the ink chamber 36 in a manner, and then the ink is heated by the heating resistor 38 to form ink droplets 42 .

Please refer to FIG. 3 , which is a schematic diagram of nozzle distribution of a third conventional inkjet print head 50 . The inkjet printhead 50 is disclosed in US Pat. No. 6,010,208. The inkjet print head 50 is respectively provided with two rows of nozzles 54 on both sides of its ink manifold (manifold) 52, and the ink manifold 52 will bidirectionally supply ink to the ink chamber 56 corresponding to the nozzles 54 to the left and right sides. , to further achieve the purpose of inkjet.

Please refer to FIG. 4 and FIG. 5 , FIG. 4 is a schematic diagram of the nozzle distribution of a conventional color inkjet print head 60 , and FIG. 5 is a schematic diagram of the inkjet print head 60 in FIG. The ink cartridge 70 includes three ink tanks 72 for storing inks of three different colors, such as yellow (Yellow), magenta (Magenta) and magenta (Cyan) inks. The inkjet printhead 60 has a base material 63, which includes three ink channels 62 and a plurality of nozzles 64 arranged in six rows and arranged on the nozzle layer 61 of the inkjet printhead 60, wherein each row of nozzles is arranged on One side of a corresponding ink flow channel 62, the ink flow channel 62 communicates with a corresponding ink storage tank 72 respectively, and is used to transmit the ink in the corresponding ink storage tank 72, and then through the heating in the ink storage tank 72 After the resistor 66 is heated to generate air bubbles, the nozzle 64 is then ejected into ink droplets. Each ink channel 62 is located below the nozzle layer, so the ink channel 62 is marked with a dotted line in FIG. 5 . In addition, as shown in FIG. Lanes 62 are conveyed to two of the rows of nozzles 64 bidirectionally, left and right.

Please refer to FIG. 6 , which is a schematic diagram of nozzle distribution of another conventional color inkjet print head 80 . The same as the inkjet print head 60, the inkjet print head 80 also includes a plurality of nozzles 64 arranged in six rows and three ink flow channels 62 (shown by dotted lines), wherein each ink flow channel 62 is also connected to a The corresponding ink storage tanks 72 are connected to deliver the ink in the ink storage tanks. The difference between the inkjet printhead 80 and the inkjet printhead 60 is that the relationship between the ink flow channel 62 of the two and the relative position of each row of nozzles 64 is different, wherein each row of nozzles 64 of the inkjet printheads 60 and 80 is formed by Arranged from top to bottom, but the arrangement of the three ink flow channels 62 of the inkjet print head 60 is arranged sequentially from left to right, and the arrangement of the three ink flow channels 62 of the inkjet print head 80 is from top to bottom. Arranged sequentially below.

In the aforementioned existing inkjet printheads, its ink supply mode is limited to one of the two-way ink supply in the center or the one-way ink supply on both sides of the edge. Ink flow channel, so under the limitation of its ink supply method, the number of its nozzles will also be limited, so that the printing resolution cannot be effectively increased.

Contents of the invention

The object of the present invention is to provide an inkjet printing head and its ink supply method which adopts the central two-way ink supply mode and the two-side edge one-way ink supply mode at the same time. The number of nozzles can make the inkjet print head arrange more than four rows of nozzles in a smaller area, which can effectively increase the printing resolution, or provide a smaller volume of inkjet print head, and has Printing effect of three or more inkjet ink colors.

The purpose of the present invention is achieved by providing an ink jet print head (ink jetprinthead), which includes: a substrate, a first central ink flow path is formed in the substrate, and an ink jet is formed on the edge of the substrate At least one first edge ink flow channel, the first central ink flow channel has a first central opening opened on the upper surface of the substrate; and a nozzle layer, arranged above the substrate, between the nozzle layer and the upper surface of the substrate A plurality of first fluid cavities and a plurality of second fluid cavities are formed, wherein the plurality of first fluid cavities are located around the first central ink flow channel, and the plurality of second fluid cavities are located around the first edge ink flow channel, Wherein, the ink is delivered to the plurality of first fluid chambers through the first central ink channel and the first central opening, and the ink is delivered to the plurality of first fluid chambers via the first edge ink channel in a single-directional manner. Two fluid chambers.

The present invention also provides an ink supply method, which includes: providing an ink cartridge, the ink cartridge includes a first ink storage tank for storing ink; providing an inkjet printing head, and connecting the ink printing head and the inkjet printing head Ink cartridge combination, wherein the inkjet printing head includes: a substrate, a first central ink channel is formed in the substrate, and at least one first edge ink channel is formed on the edge of the substrate, the first central The ink channel has a first central opening opened on the upper surface of the substrate; and a nozzle layer is arranged above the substrate, and a plurality of first fluid cavities and a plurality of second fluid chambers are formed between the nozzle layer and the upper surface of the substrate. body cavity, wherein the plurality of first fluid chambers are located around the first central ink channel, and the plurality of second fluid chambers are located around the first edge ink channel, wherein ink passes through the first central ink channel and the The first central opening delivers to the plurality of first fluid chambers, and ink is single-directionally delivered to the plurality of second fluid chambers via the first edge ink channel.

The present invention also provides an ink jet printhead, which includes: a substrate, a first central ink channel is formed in the substrate, and a first edge is formed on both sides of the substrate an ink flow channel and a second edge ink flow channel, the first central ink flow channel has a first central opening opened on the upper surface of the substrate; and a nozzle layer is arranged above the substrate, the nozzle layer and the substrate A plurality of first fluid chambers, a plurality of second fluid chambers and a plurality of fourth fluid chambers are formed between the surfaces, wherein the plurality of first fluid chambers are located around the first central ink channel, and the plurality of second fluid chambers are located Around the first edge ink flow channel, and the plurality of fourth fluid chambers are located around the second edge ink flow channel, wherein the first, second and third ink storage tanks all store ink and are not communicated with each other , and the first central ink flow channel communicates with a first ink storage tank, the first edge ink flow channel communicates with a second ink storage tank, and the second edge ink flow channel communicates with a third ink storage tank, The ink in the first ink storage tank is delivered to the plurality of first fluid chambers through the first central ink flow channel and the first central opening, and the ink in the second ink storage tank is delivered to the plurality of first fluid chambers through the first edge ink flow channel unit. The ink in the third ink tank is unidirectionally delivered to the plurality of second fluid chambers via the second edge ink channel to the plurality of fourth fluid chambers.

To sum up, the print head of the present invention includes a substrate, a nozzle layer and a plurality of bubble generating components. A central ink channel and an edge ink channel for delivering ink are formed in the substrate. The central ink channel has a central opening and is located on the upper surface of the substrate, while the edge ink channel is formed along the edge of the substrate. The nozzle layer is arranged above the substrate, which includes a plurality of nozzles and forms a plurality of first fluid chambers, a plurality of second fluid chambers and a plurality of third fluid chambers with the top side of the substrate, wherein the plurality of first fluid chambers, a central The opening, the third fluid chambers and the second fluid chambers are arranged sequentially from left to right, and the third fluid chambers are located between the central opening and the second fluid chambers. Each bubble generating member corresponds to a fluid cavity and is adjacent to a corresponding nozzle on the nozzle layer, and is used for generating bubbles in the corresponding fluid cavity to eject the ink in the fluid cavity from the corresponding nozzle to form ink droplets. In addition, the ink is delivered to the plurality of first fluid chambers and the plurality of third fluid chambers through the first central ink channel and the central opening, and the ink is delivered to the plurality of second fluid chambers along the edge of the substrate through the first edge ink channel. , to reach the step of supplying ink to the inkjet printing head.

Description of drawings

Fig. 1 is the structural representation of existing inkjet printing head;

Fig. 2 is the structural representation of another kind of existing ink-jet printing head;

Fig. 3 is a schematic diagram of the distribution of nozzles of the third conventional ink print head;

Fig. 4 is a schematic diagram of nozzle distribution of an existing color inkjet print head;

Fig. 5 is the schematic diagram when Fig. 4 inkjet printing head is arranged on an ink cartridge;

Fig. 6 is a schematic diagram of nozzle distribution of another existing color inkjet print head;

7 is a schematic diagram of nozzle distribution of the inkjet print head according to the first embodiment of the present invention;

Fig. 8 is the schematic diagram when Fig. 7 inkjet printing head is arranged on an ink cartridge;

9 is a schematic diagram of nozzle distribution of an inkjet print head according to a second embodiment of the present invention;

Fig. 10 is a schematic diagram when the inkjet print head in Fig. 9 is arranged in the ink cartridge;

11 is a schematic diagram of nozzle distribution of an inkjet printhead according to a third embodiment of the present invention;

Figure 12 is a schematic diagram of the inkjet print head in Figure 11 when it is set in a color ink cartridge;

13 is a schematic diagram of nozzle distribution of an inkjet printhead according to a fourth embodiment of the present invention;

Fig. 14 is a schematic diagram when the ink print head of Fig. 13 is arranged in a color ink cartridge;

15 is a schematic diagram of nozzle distribution of an inkjet printhead according to a fifth embodiment of the present invention;

Figure 16 is a schematic view of the inkjet print head in Figure 15 when it is set in a color ink cartridge;

17 is a schematic diagram of nozzle distribution of an inkjet printhead according to a sixth embodiment of the present invention;

Figure 18 is a schematic diagram of when the inkjet print head of Figure 17 is arranged in a color ink cartridge;

19 is a schematic diagram of nozzle distribution of an inkjet printhead according to a seventh embodiment of the present invention;

FIG. 20 is a schematic diagram of the distribution of nozzles of the inkjet printhead according to the eighth embodiment of the present invention.

Detailed ways

Please refer to FIG. 7 and FIG. 8, FIG. 7 is a schematic diagram of nozzle distribution of an inkjet printhead (Ink jetprinthead) 100 according to a first embodiment of the present invention, and FIG. 8 is a diagram showing that the inkjet printhead 100 of FIG. time schematic diagram. The inkjet print head 100 includes a substrate (Substrate) 101, a nozzle layer (Nozzle layer) 102 and a plurality of bubble generating components 103, and the ink cartridge 110 includes an ink storage tank 111 for storing ink. In addition, the inkjet print head 100 also includes a flexible circuit board (Tape Automated Bonding, TAB) 109, which is connected to the nozzle layer 102 on the substrate 101, and is glued to the shell of the ink cartridge 110 (not shown in the figure). A first central ink flow channel 104 , a first edge ink flow channel 106 and a second edge ink flow channel 108 are formed in the substrate 101 for transporting the ink in the ink storage tank 111 . The first central ink flow channel 104 has a central opening 105 opened on the upper surface of the substrate 101 , and the first edge ink flow channel 106 and the second edge ink flow channel 108 are formed along the edge of the substrate 101 . In addition, the nozzle layer 102 is disposed above the substrate 101, and includes a plurality of nozzles (Nozzles) 112 arranged in four rows, and forms a plurality of first fluid chambers 122 and a plurality of second fluid chambers 126 with the upper surface of the substrate 101. , a plurality of third fluid chambers 124 and a plurality of fourth fluid chambers 128 . In addition, each bubble generating member 103 of the inkjet print head 100 is a heating resistor, and is respectively corresponding to a fluid cavity 122, 124, 126 or 128 and is adjacent to a corresponding nozzle 112 on the nozzle layer 102. Each bubble The generating member 103 is used to heat the ink in its corresponding fluid cavity 122, 124, 126 or 128 to generate air bubbles to eject the ink in the fluid cavity 122, 124, 126 or 128 from its corresponding nozzle 112 to form ink droplets .

Second edge ink channel 108, plurality of fourth fluid chambers 128, plurality of first fluid chambers 122, central opening 105, plurality of third fluid chambers 124, plurality of second fluid chambers 126, and first edge ink channel 106 Sequentially arranged from left to right, a plurality of first fluid chambers 122 are located between the central opening 105 and the second edge ink channel 108, and a plurality of third fluid chambers 124 are located between the central opening 105 and the first edge ink channel 106 During this period, the ink in the ink storage tank 111 can be transported to multiple first fluid chambers 122 and multiple third fluid chambers 124 via the first central ink channel 104 and the central opening 105 in a two-directional manner, and then through the first central ink channel 104 and the central opening 105 An edge ink channel 106 is single-directionally delivered to the plurality of second fluid chambers 126 along the edge of the substrate 101 to the left, and can be unidirectionally directed to the right along the edge of the substrate 101 via the second edge ink channel 108 Single-directional delivery to a plurality of fourth fluid chambers 128 . In this embodiment, the first and second edge ink flow channels 106, 108 are formed by the inner wall of the ink storage tank 111 and the edge of the substrate 101. Therefore, through this structural design, the substrate of the ink print head 100 can Between the nozzle layer 101 and the nozzle layer 102, in addition to the plurality of first and third fluid chambers 122, 124, a plurality of third and fourth fluid chambers 126 arranged in two rows are formed near the two side edges of the substrate 101 , 128, thereby increasing the number of nozzles 112 per unit area of the inkjet print head 100, and increasing the printing resolution. It should be noted here that the inkjet printhead 100 can also omit the setting of the second edge ink channel 108 and the fourth fluid chamber 108, while retaining other structures of the inkjet printhead 100, which can also achieve increased inkjet printing. The purpose of the number of nozzles 112 per unit area of the head 100.

As described above, the plurality of first fluid chambers 122, the plurality of second fluid chambers 126, the plurality of third fluid chambers 124, and the plurality of fourth fluid chambers 128 of the inkjet printhead 100 are all formed in a single row. Between the substrate 101 and the nozzle layer 102, however, the arrangement of the fluid chambers 122, 124, 126 and 128 in the present invention is not limited thereto, for example: the fluid chambers 122, 124, 126 or 128 may also be arranged in more than two rows way to present. Please refer to FIG. 9 and FIG. 10. FIG. 9 is a schematic diagram of nozzle distribution of the inkjet print head 150 according to the second embodiment of the present invention, and FIG. 10 is a schematic diagram of the inkjet print head 150 in FIG. The structure of the inkjet printhead 150 is very similar to that of the inkjet printhead 100. The main difference between the two is that the inkjet printhead 150 has a plurality of first fluid chambers 122, a plurality of third fluid chambers 124, and a plurality of second fluid chambers. 126 and a plurality of fourth fluid chambers 128 are arranged in two rows between the substrate 101 and the nozzle layer 102 .

In the aforementioned first embodiment and second embodiment, the ink stored in the ink storage tank 111 is ink of a single color, such as black ink, so in FIG. 7, the four rows of fluid chambers 122, 124, The longitudinal distance between the nozzles 112 of 126 and 128 is d, that is, the resolution of the single row is all the same, for example, 300dpi (dot per inch), but the horizontal positions of the nozzles 112 of the four rows of fluid chambers 122, 124, 126 and 128 Not the same, the longitudinal distance gap (offset) between two rows of different fluid chambers is d/4, therefore, the inkjet print head 100 of the first embodiment can obtain four times the The resolution of a single row is 1,200dpi. Similarly, in FIG. 9, the two rows of nozzles 112 in each row of fluid chambers 122, 124, 126 and 128 are horizontally staggered by a distance to achieve the situation that the horizontal positions of the eight rows of nozzles 112 are not the same, for example The vertical distance difference is d/8. Therefore, when the inkjet print head 150 of the second embodiment is actually printing, it can obtain eight times the resolution of a single row through such a design, that is, the resolution of 2,400dpi . Therefore, without greatly increasing the volume of the inkjet printing head 100, 150, its printing resolution can be greatly increased.

Please refer to FIG. 11 and FIG. 12 , FIG. 11 is a schematic diagram of the nozzle distribution of the inkjet print head 170 according to the third embodiment of the present invention, and FIG. 12 is a schematic diagram of the inkjet print head 170 in FIG. 11 installed in a color ink cartridge 180 . The color ink cartridge 180 includes a first ink storage tank 132, a second ink storage tank 134 and a third ink storage tank 136, which are respectively used to store inks of three different colors, such as magenta (Magenta), yellow ( Yellow) and Cyan inks, or Light Magenta, Light Yellow, and Light Cyan inks respectively, and the three inks in the color ink cartridge 180 The storage tanks 132, 134, 136 are not in communication with each other. The inkjet printing head 170 also includes a substrate 101 and a nozzle layer 102, and a plurality of first fluid chambers 122, a plurality of second fluid chambers 126, and a plurality of third fluid chambers 124 are also formed between the substrate 101 and the nozzle layer 102. and a plurality of fourth fluid chambers 128, and a first central ink flow channel 104, a first edge ink flow channel 106 and a second edge ink flow channel 108 are also formed in the substrate 101 to deliver the first and second ink flow channels respectively. And the ink stored in the third ink storage tank 132 , 134 , 136 . Wherein a plurality of first fluid chambers 122 and a plurality of third fluid chambers 124 are respectively arranged in a single row and communicated with the first ink storage tank 132 through the first central ink channel 104, and the plurality of second fluid chambers 126 and the plurality of fourth fluid chambers The fluid chambers 128 are all arranged in double rows, wherein a plurality of second fluid chambers 126 communicate with the second ink storage tank 134 through the first edge ink flow channel 106, and a plurality of fourth fluid chambers 128 communicate with the second ink flow channel 108 through the second edge ink flow channel 108. The third ink tank 136 is in communication.

In the third embodiment, the first fluid chamber 122 and the third fluid chamber 124 provide ink of the same color, so their horizontal positions must be staggered to improve its printing resolution; in addition, the second fluid chamber 126 and the fourth fluid chamber 128 There are also two rows of nozzles with horizontally staggered positions to achieve the same resolution as the first fluid chamber 122 and the third fluid chamber 124 . Therefore, with such a design, a single inkjet print head 170 can be used to achieve the printing effect with three inkjet ink colors.

Please refer to FIG. 13 and FIG. 14. FIG. 13 is a schematic diagram of nozzle distribution of the inkjet print head 190 according to the fourth embodiment of the present invention, and FIG. 14 is a schematic diagram of the inkjet print head 190 in FIG. The main difference between the color ink cartridge 200 and the color ink cartridge 180 is that the color ink cartridge 200 includes a fourth ink reservoir besides the first ink reservoir 132, the second ink reservoir 134 and the third ink reservoir 136. The tank 196 is used to store the ink of the fourth color, and the four ink storage tanks 132 , 134 , 136 , 196 in the color ink cartridge 200 are not connected to each other. In addition, in addition to forming a first central ink flow channel 104, a first edge ink flow channel 106 and a second edge ink flow channel 108, a second central ink flow channel is formed in the substrate 101 of the inkjet print head 190. Channel 192, which is located between the first central ink flow channel 104 and the first edge ink flow channel 106, two rows of multiple third fluid chambers 124 are formed between the nozzle layer 102 and the upper surface of the substrate 101, distributed in the second central Two sides of the ink flow channel 192 ; and two rows of multiple first fluid chambers 122 are distributed on both sides of the first central ink flow channel 104 . Therefore, the inkjet print head 190 has the function of supplying ink in four colors. It should be noted here that one of the four ink storage tanks 132, 134, 136, and 196 of the color ink cartridge 200 can be used to store The other three ink storage tanks can store other three colors, such as yellow, magenta and magenta ink, so that there is no need to include two ink cartridges like existing color printers, Wherein, one ink box is used for storing ink of at least three different colors such as color (Color) or photo color (Photo), and the other ink box is used for storing black ink.

Please refer to FIG. 15 and FIG. 16 , FIG. 15 is a schematic diagram of the nozzle distribution of the inkjet print head 210 according to the fifth embodiment of the present invention, and FIG. 16 is a schematic diagram of the inkjet print head 210 in FIG. The inkjet printhead 210 is an inkjet printhead with a five-color ink supply function. The main difference between it and the inkjet printhead 190 is that the inkjet printhead 210 has a third central ink channel 212 located in the first central Between the ink flow channel 104 and the second edge ink flow channel 108, and between the nozzle layer 102 and the upper surface of the substrate 101, two rows of a plurality of fifth fluid chambers 194 are formed on both sides of the third central ink flow channel 212. and two rows of multiple first fluid chambers 122 are distributed on both sides of the first central ink flow channel 104; and two rows of multiple third fluid chambers 124 are then distributed on both sides of the second central ink flow channel 192 . In addition to the first ink storage tank 132, the second ink storage tank 134, the third ink storage tank 136 and the fourth ink storage tank 196, the color ink cartridge 220 also includes a fifth ink storage tank 216 for storing the fifth ink storage tank. The five ink storage tanks 132, 134, 136, 196, 216 in the color ink cartridge 220 are not connected to each other. Generally speaking, the first, fourth, and fifth ink storage tanks 132, 196, and 216 can be used to store magenta, yellow, and magenta inks, while the second and third ink storage tanks 134, 136 are used to store Light magenta (Light Magenta) and light magenta (Light Cyan) inks to increase the number of printing color levels of the inkjet print head 210 .

Please refer to FIG. 17 and FIG. 18. FIG. 17 is a schematic diagram of the nozzle distribution of the inkjet print head 230 according to the sixth embodiment of the present invention, and FIG. 18 is a schematic diagram of the inkjet print head 230 in FIG. The inkjet printhead 230 is a four-color inkjet printhead, and the inkjet printhead 230 also forms a first central ink flow path 104, a first edge ink flow path 106, and a second edge ink flow path in the substrate 101. The channel 108 , a second central ink channel 192 and a second central ink channel 212 are used for supplying inks of different colors. The ink cartridge 240 includes first, second, third and fourth ink storage tanks 132, 134, 136, 196 that are not connected to each other, wherein the first, second and fourth ink storage tanks 132, 134, 196 are used for to store Cyan, Yellow and Magenta inks to supply ink to the nozzles 112 respectively, and the third ink storage tank 136 is used to store black ink with a larger demand, and through the first The three central ink flow channels 212 and the second edge ink flow channels 108 supply ink to the fifth fluid chamber 194 and the fourth fluid chamber 128 respectively.

Please refer to FIG. 19 . FIG. 19 is a schematic diagram of nozzle distribution of an inkjet printhead 250 according to a seventh embodiment of the present invention. The inkjet printhead 250 provides an inkjet printhead with a three-color ink supply function, which includes a plurality of nozzles 112 arranged in four rows and three columns, three first central ink flow channels 104m, 104c, 104y, three The first edge ink flow channel 106m, 106c, 106y and three second edge ink flow channels 108m, 108c, 108y, wherein the central ink flow channel 104m, 104c, 104y are used to bidirectionally supply ink to the second row and the first row of the same column The nozzles 112 of three rows, the first edge ink channel 106m, 106c, 106y are used for unidirectionally supplying ink to the nozzle 112 of the fourth row of the same column, and the second edge ink channel 108m, 108c, 108y are used for unidirectionally Ink is supplied to the nozzles 112 of the first row of the same column. The nozzles 112 of the first row communicate with a first ink reservoir (not shown), the nozzles 112 of the second row communicate with a second ink reservoir (not shown), and the nozzles 112 of the third row communicate with a first ink reservoir (not shown). The three ink storage tanks (not shown) are connected, and wherein the first, second and third ink storage tanks are respectively filled with inks of different colors and are not connected to each other, so the color of the ink ejected by the nozzles 112 of each row will also be different. Are not the same.

Please refer to FIG. 20 , which is a schematic diagram of nozzle distribution of an inkjet print head 260 according to an eighth embodiment of the present invention. The inkjet printhead 260 provides an inkjet printhead with five-color ink supply function, which includes a plurality of nozzles 112 arranged in four rows and three columns, three first central ink flow channels 104m, 104c, 104y, a first An edge ink flow path 106 and a second edge ink flow path 108, wherein the central ink flow path 104m, 104c, 104y are used to bidirectionally supply ink to the nozzles 112 of the second row and the third row, the first edge ink flow path The channel 106 is used to unidirectionally supply ink to the nozzles 112 of the fourth row, and the second edge ink channel 108 is used to unidirectionally supply ink to the nozzles 112 of the first row. The nozzles 112 of the first row communicate with a first ink reservoir (not shown), the nozzles 112 of the fourth row communicate with a second ink reservoir (not shown), and the second row and the The nozzles 112 of the three rows communicate with a third ink reservoir (not shown), the nozzles 112 of the second row and the third row in the second column communicate with a fourth ink reservoir (not shown), and the third row The nozzles 112 of the second row and the third row are connected with a fifth ink storage tank (not shown); and wherein the first, second, third, fourth and fifth ink storage tanks are respectively equipped with inks of different colors. The inks are not connected to each other, so the inkjet printing head 260 can eject ink droplets of five different colors.

Compared with the existing inkjet printhead, the inkjet printhead of the present invention can be effective through its unique ink supply method because it adopts the inkjet printhead of the central two-way ink supply and the double-side edge unidirectional ink supply mode at the same time. Increasing the number of nozzles per unit area can make the inkjet print head arrange more than four rows of nozzles in a smaller area, so that the printing resolution can be effectively increased, or a smaller volume can be provided. Tsk ink print head, while printing effect with three or more inkjet ink colors.

However, in addition to inkjet printing, inkjet printheads also have numerous other possible applications, such as: fuel injection systems, cell sorting, drug delivery systems, direct injection Printing lithography (Direct print lithography) and micro jet propulsion systems (Micro jet propulsion systems), etc., so it should not be limited to inkjet printing.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the patent of the present invention.

Claims (26)

1. A kind of inkjet print head (ink jet printhead), it comprises: A substrate, a first central ink flow channel is formed in the substrate, and at least one first edge ink flow channel is formed on the edge of the substrate, the first central ink flow channel has a first opening on the upper surface of the substrate central opening; and A nozzle layer is arranged above the substrate, and a plurality of first fluid chambers and a plurality of second fluid chambers are formed between the nozzle layer and the upper surface of the substrate, wherein the plurality of first fluid chambers are located in the first central ink channel around, and the plurality of second fluid chambers are located around the first edge ink channel, Wherein, the ink is delivered to the plurality of first fluid chambers through the first central ink channel and the first central opening, and the ink is delivered to the plurality of first fluid chambers via the first edge ink channel in a single-directional manner. Two fluid chambers. 2. The printing head according to claim 1, further comprising a plurality of bubble generating members and a plurality of nozzles, each bubble generating member corresponding to a fluid chamber and adjacent to a corresponding nozzle for use in the corresponding Air bubbles are generated in the fluid cavity, so that the ink in the fluid cavity is ejected from the corresponding nozzle. 3. The printing head as claimed in claim 1, wherein a plurality of third fluid chambers are additionally formed between the nozzle layer and the upper surface of the substrate, and the first central ink channel is between the plurality of first fluid chambers and the first central ink channel. Between the plurality of third fluid chambers. 4. The print head according to claim 1, wherein a second edge ink channel is additionally formed on the edge of the substrate, and a plurality of fourth fluid chambers are additionally formed between the mouth layer and the upper surface of the substrate, The plurality of fourth fluid chambers communicate with the second edge ink channel, and ink is unidirectionally delivered to the plurality of fourth fluid chambers through the second edge ink channel. 5. The printing head as claimed in claim 4, wherein the first edge ink flow channel is arranged on the edge of one long side of the substrate, and the second edge ink flow channel is arranged on the edge of the other long side of the substrate . 6. The printing head as claimed in claim 4, wherein the first central ink flow channel, the first edge ink flow channel and the second edge ink flow channel are all communicated with an ink storage tank, and stored in the ink storage tank There is ink, and the ink in the ink reservoir is delivered to the plurality of first fluid chambers via the first central ink channel, and is delivered to the plurality of second fluid chambers via the first edge ink channel, and via the The second edge ink channel communicates to the plurality of fourth fluid chambers. 7. The printhead of claim 4, wherein the first central ink channel communicates with a first ink reservoir, the first edge ink channel communicates with a second ink reservoir, and the second edge ink The flow channel communicates with a third ink storage tank. The first ink storage tank, the second ink storage tank and the third ink storage tank all store ink and are not connected to each other. The ink in the first ink storage tank can be delivered to the plurality of first fluid chambers via the first central ink flow channel, ink in the second ink reservoir can be delivered to the plurality of second fluid chambers via the first edge ink flow channel, and the third The ink in the ink storage tank can be delivered to the plurality of fourth fluid chambers through the second edge ink channel. 8. The print head according to claim 1, wherein a second central ink channel is additionally formed in the substrate, and a plurality of fifth fluid chambers are additionally formed between the nozzle layer and the upper surface of the substrate, distributed in the two sides of the second central ink channel. 9. The printing head as claimed in claim 8, wherein a third central ink channel is further formed in the substrate, and a plurality of sixth fluid chambers are formed on the nozzle layer and the upper surface of the substrate, distributed in the first fluid cavity. Three sides of the central ink runner. 10. The print head according to claim 1, wherein the first central ink channel and the first edge ink channel communicate with an ink storage tank, the ink storage tank stores ink, and the ink storage tank The ink inside is delivered to the plurality of first fluid chambers through the first central ink channel, and the ink is delivered to the plurality of second fluid chambers through the first edge ink channel. 11. The print head of claim 1 , wherein the first central ink channel communicates with a first ink reservoir, the first edge ink channel communicates with a second ink reservoir, and the first and second ink channels communicate with each other. Ink is stored in the two ink storage tanks and is not communicated with each other. The ink in the first ink storage tank is sent to the plurality of first fluid chambers through the first central ink flow channel, and the ink in the second ink storage tank Delivered to the plurality of second fluid chambers via the first edge ink channel. 12. The print head as claimed in claim 1, wherein the plurality of first fluid chambers or the plurality of second fluid chambers are arranged in more than two rows and formed between the substrate and the nozzle layer. 13. The print head as claimed in claim 1, wherein the plurality of first fluid chambers and the plurality of second fluid chambers are arranged in more than two rows and formed between the substrate and the mouthpiece layer. 14. An ink supply method comprising: providing an ink cartridge, the ink cartridge includes a first ink storage tank for storing ink; An ink jet print head is provided, and the ink jet print head is combined with the ink cartridge, wherein the ink jet print head includes: A substrate, a first central ink flow channel is formed in the substrate, and at least one first edge ink flow channel is formed on the edge of the substrate, the first central ink flow channel has a first opening on the upper surface of the substrate central opening; and A nozzle layer is arranged above the substrate, and a plurality of first fluid chambers and a plurality of second fluid chambers are formed between the nozzle layer and the upper surface of the substrate, wherein the plurality of first fluid chambers are located in the first central ink channel around, and the plurality of second fluid chambers are located around the first edge ink channel, Wherein, the ink is delivered to the plurality of first fluid chambers through the first central ink channel and the first central opening, and the ink is delivered to the plurality of first fluid chambers via the first edge ink channel in a single-directional manner. Two fluid chambers. 15. The method according to claim 14, wherein the inkjet printing head further comprises a plurality of bubble generating members and a plurality of nozzles, each bubble generating member corresponds to a fluid chamber and is adjacent to a corresponding nozzle, for Bubbles are generated in the corresponding fluid cavity to eject the ink in the fluid cavity from the corresponding nozzle. 16. The method according to claim 14, wherein a plurality of third fluid cavities are additionally formed between the nozzle layer and the upper surface of the substrate, and the first central ink channel is interposed between the plurality of first fluid cavities and the first fluid cavity. Between multiple third fluid chambers. 17. The method according to claim 14, wherein a second edge ink channel is additionally formed on the edge of the substrate, and a plurality of fourth fluid chambers are additionally formed between the nozzle layer and the upper surface of the substrate, the plurality of A fourth fluid cavity communicates with the second edge ink flow channel, and ink is unidirectionally delivered to the plurality of fourth fluid cavity through the second edge ink flow channel. 18. The method according to claim 17, wherein the first edge ink flow channel is disposed on the edge of one long side of the substrate, and the second edge ink flow channel is disposed on the edge of the other long side of the substrate. 19. The method of claim 17, wherein the first central ink channel, the first edge ink channel, and the second edge ink channel are all in communication with the first ink reservoir, and ink passes through the second A central ink channel communicates to the plurality of first fluid chambers, communicates to the plurality of second fluid chambers via the first edge ink channels, and communicates to the plurality of fourth fluid chambers via the second edge ink channels cavity. 20. The method according to claim 17, wherein the ink cartridge further comprises a second ink storage tank and a third ink storage tank for storing ink, the first ink storage tank, the second ink storage tank and The third ink storage tanks are not connected to each other, the first central ink channel communicates with the first ink storage tank, and the ink in the first ink storage tank can be sent to the plurality of ink storage tanks through the first central ink channel. a first fluid chamber, and the first edge ink flow channel communicates with the second ink storage tank, the ink in the second ink storage tank can be delivered to the plurality of second fluid chambers through the first edge ink flow channel, and The second edge ink flow channel communicates with the third ink storage tank, and the ink in the third ink storage tank can be delivered to the plurality of fourth fluid chambers through the second edge ink flow channel. 21. The method according to claim 14, wherein a second central ink channel is additionally formed in the substrate, and a plurality of fifth fluid chambers are additionally formed between the nozzle layer and the upper surface of the substrate, distributed in the Both sides of the second central ink channel. 22. The method according to claim 21, wherein a third central ink channel is additionally formed in the substrate, and a plurality of sixth fluid chambers are additionally formed between the nozzle layer and the upper surface of the substrate, distributed in the Both sides of the third central ink channel. 23. The method of claim 14, wherein the first central ink channel and the first edge ink channel communicate with the ink reservoir, and the ink in the ink reservoir passes through the first central ink channel channels are delivered to the plurality of first fluid chambers, and ink is delivered to the plurality of second fluid chambers via the first edge ink flow channels. 24. The method according to claim 14, wherein the ink cartridge further comprises a second ink storage tank for storing ink, the first ink storage tank and the second ink storage tank are not communicated with each other, and the first central The ink flow channel communicates with the first ink storage tank, the ink in the first ink storage tank can be delivered to the plurality of first fluid chambers through the first central ink flow channel, and the first edge ink flow channel communicates with the first ink storage tank. The two ink storage tanks are connected, and the ink in the second ink storage tank can be sent to the plurality of second fluid chambers through the first edge ink channel. 25. An inkjet print head (ink jet printhead), which includes: A substrate, a first central ink flow channel is formed in the substrate, and a first edge ink flow channel and a second edge ink flow channel are respectively formed on both side edges of the substrate, the first central ink flow channel has a a first central opening opening on the upper surface of the substrate; and A nozzle layer is arranged above the substrate, and a plurality of first fluid chambers, a plurality of second fluid chambers and a plurality of fourth fluid chambers are formed between the nozzle layer and the upper surface of the substrate, wherein the plurality of first fluid chambers are located around the first central ink flow channel, the plurality of second fluid chambers are located around the first edge ink flow channel, and the plurality of fourth fluid cavities are located around the second edge ink flow channel, Wherein, ink is stored in the first, second and third ink storage tanks and is not communicated with each other, and the first central ink flow channel communicates with a first ink storage tank, and the first edge ink flow channel communicates with a first ink storage tank. The second ink storage tank communicates, the second edge ink flow channel communicates with a third ink storage tank, and the ink in the first ink storage tank is delivered to the multiple ink storage tanks through the first central ink flow channel and the first central opening. a first fluid chamber, the ink in the second ink storage tank is unidirectionally delivered to the plurality of second fluid chambers via the first edge ink channel, and the ink in the third ink storage tank is delivered to the plurality of second fluid chambers via the second edge The ink channel is unidirectionally delivered to the plurality of fourth fluid chambers. 26. The print head as claimed in claim 25, wherein the ink in the first ink storage tank, the ink in the second ink storage tank and the ink in the third ink storage tank are inks of three different colors.

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