KR20220125910A - Inkjet printing device - Google Patents

Abstract

An inkjet printing device includes: a substrate stage movable in a first direction with a substrate loaded thereon; an inkjet head assembly including a plurality of inkjet heads spaced apart from each other by a first distance and ejecting ink to the substrate on the substrate; a plurality of ink storage members respectively connected to the plurality of inkjet heads by a plurality of ink supply pipes on the inkjet head assembly and spaced apart from each other at a second distance wider than the first distance; and an actuator connected to the inkjet head assembly between the plurality of inkjet storage members and the inkjet head assembly to adjust an inclination of the inkjet head assembly. Accordingly, the inkjet printing device can eject ink in place.

Description

Inkjet printing device {INKJET PRINTING DEVICE}

The present invention relates to an inkjet printing apparatus. More particularly, the present invention relates to an inkjet printing apparatus that is precisely operable and easy to maintain.

As information technology develops, the market for display devices, which is a connection medium between users and information, is growing. Accordingly, a liquid crystal display (LCD), an organic light emitting diode (OLED), a flat panel display (FPD), such as a plasma display panel (PDP) usage is increasing.

A flat panel display using such an organic light emitting diode has a fast response speed and a wide viewing angle, so it is emerging as a next-generation display device. In particular, since the manufacturing process is simple, there is an advantage that the production cost can be greatly reduced compared to the conventional liquid crystal display device.

As a method of manufacturing a flat panel display using an organic electroluminescent device, there is an inkjet printing deposition method. In general, in the inkjet printing deposition method, a substrate stage loaded with a substrate is moved, and ink is discharged toward the substrate from the top.

In this case, the position and inclination of the substrate stage may be changed while the substrate stage is moved. Also, the positions and inclinations of the inkjet heads that discharge ink may be changed. For this reason, if the ink is not ejected in a direction perpendicular to the substrate (if not ejected at the correct position), a desired pattern may not be formed uniformly, and the quality of the product may be deteriorated.

SUMMARY OF THE INVENTION One object of the present invention is to provide an inkjet printing apparatus for discharging ink to a fixed position.

However, the object of the present invention is not limited to these objects, and may be variously expanded without departing from the spirit and scope of the present invention.

In order to achieve the above object of the present invention, an inkjet printing apparatus according to embodiments includes a substrate stage movable in a first direction in a state in which a substrate is loaded, discharging ink to the substrate on the substrate, and each other first An inkjet head assembly including a plurality of inkjet heads spaced apart from each other, each connected to the plurality of inkjet heads by a plurality of ink supply pipes on the inkjet head assembly, and spaced apart from each other by a second interval wider than the first interval and an actuator connected to the inkjet head assembly between the plurality of inkjet storage members and the inkjet head assembly to adjust a tilt of the inkjet head assembly.

In an embodiment, the actuator may be capable of adjusting a distance between the inkjet head assembly and the substrate stage.

In an embodiment, the apparatus may further include a gantry that moves the inkjet head assembly and the plurality of ink storage members in a second direction crossing the first direction on the substrate stage.

In an embodiment, the plurality of ink storage members may be connected to the gantry in the first direction of the gantry.

In an embodiment, an inkjet head driving assembly including a driving circuit for driving the plurality of inkjet heads and connected to each of the plurality of inkjet heads by a connection cable may be further included.

In an embodiment, the inkjet head driving assembly may be connected to the gantry and the inkjet heads in the first direction of the gantry.

In an embodiment, the inkjet head driving assembly may be connected to the gantry and the inkjet heads in a third direction opposite to the first direction of the gantry.

In an embodiment, the plurality of ink storage members include an inkjet head driving assembly including a driving circuit for driving the plurality of inkjet heads, and the inkjet head driving assembly is connected to each of the plurality of inkjet heads. They can be connected by cables.

In an embodiment, the gantry may be capable of adjusting a distance between the plurality of inkjet heads and the plurality of ink storage members and the substrate stage.

In an embodiment, the plurality of ink storage members may be connected to the gantry in the first direction of the gantry and in a third direction opposite to the first direction.

In one embodiment, a driving circuit for driving the plurality of inkjet heads may be included, and the plurality of inkjet head driving assemblies may further include a plurality of inkjet head driving assemblies connected to each of the plurality of inkjet heads by a connection cable.

In an embodiment, the inkjet head driving assemblies may be connected to the gantry and the inkjet heads in the first direction and the third direction of the gantry.

In an embodiment, the display device may further include a maintenance stage disposed in the second direction of the substrate stage and configured to maintain the plurality of inkjet heads.

In an embodiment, the plurality of ink supply pipes may be connected to each of the plurality of ink storage members by a coupler.

Inkjet printing apparatus according to embodiments of the present invention includes a substrate stage movable in a first direction in a state in which a substrate is loaded, and a plurality of inkjet heads that discharge ink to the substrate on the substrate and are spaced apart from each other by a first interval. The plurality of ink storage members may be respectively connected to the plurality of inkjet heads by an inkjet head assembly including a plurality of ink supply pipes and spaced apart from each other by a second interval wider than the first interval. Accordingly, even if the inkjet printing apparatus is enlarged, it is possible to easily secure a space for arranging wirings and supply pipes connecting the components.

In addition, the inkjet printing apparatus may further include an actuator. The actuator may be connected to the inkjet head assembly at a portion adjacent to the inkjet head assembly to adjust a tilt of the inkjet head assembly and to adjust a distance between the inkjet head assembly and the substrate stage.

In this way, the actuator adjusts the height and inclination of the inkjet head assembly at a position adjacent to the inkjet head assembly, thereby adjusting the height and inclination of the inkjet heads with minimal movement without the need to adjust the height of the ink storage member. The inkjet printing device can be controlled precisely and precisely.

However, the effects of the present invention are not limited to the above-described effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a block diagram schematically illustrating a display device according to an exemplary embodiment.
FIG. 2 is a cross-sectional view schematically illustrating an embodiment taken along line II′ of FIG. 1 .
3 and 4 are views illustrating an inkjet printing apparatus according to embodiments of the present invention.
5 and 6 are views illustrating an inkjet printing apparatus according to embodiments of the present invention.
7 and 8 are views illustrating an inkjet printing apparatus according to embodiments of the present invention.
9 and 10 are views illustrating an inkjet printing apparatus according to embodiments of the present invention.

Hereinafter, a bonding apparatus according to embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same or similar reference numerals are used for the same components in the accompanying drawings.

1 is a block diagram schematically illustrating a display device according to an exemplary embodiment.

Referring to FIG. 1 , the display device may include a display panel DP including a plurality of pixels P, a data driver DDV, a gate driver GDV, and a timing controller CON.

The display device may display an image through the display panel DP. To this end, the display panel DP may include the pixels P and light emitting devices connected to the pixels P. In some embodiments, the display panel DP may be configured as a single panel. Alternatively, in some embodiments, the display panel DP may be configured by connecting a plurality of panels.

The timing controller CON may generate the gate control signal GCTRL, the data control signal DCTRL, and the output image data ODAT based on the control signal CTRL and the input image data IDAT provided from the outside. have. For example, the control signal CTRL may include a vertical synchronization signal, a horizontal synchronization signal, an input data enable signal, a master clock signal, and the like. For example, the input image data IDAT may be RGB data including red image data, green image data, and blue image data. Alternatively, the input image data IDAT may include magenta image data, cyan image data, and yellow image data.

The gate driver GDV may generate gate signals based on the gate control signal GCTRL provided from the timing controller CON. For example, the gate control signal GCTRL may include a vertical start signal, a clock signal, and the like. In some embodiments, the gate driver GDV may be manufactured as a separate panel and connected to the display panel DP. The gate driver GDV may be electrically connected to the display panel DP and sequentially output the gate signals. Each of the pixels P may receive a data voltage according to control of each of the gate signals.

The data driver DDV may generate the data voltage based on the data control signal DCTRL provided from the timing controller CON and the output image data ODAT. For example, the data control signal DCTRL may include an output data enable signal, a horizontal start signal, and a load signal. In some embodiments, the data driver DDV may be manufactured as a separate panel and may be electrically connected to the display panel DP. The data driver DDV may be electrically connected to the display panel DP and may generate a plurality of data voltages. Each of the pixels P may transmit a luminance signal corresponding to each of the data voltages to the light emitting devices.

FIG. 2 is a cross-sectional view schematically illustrating an embodiment taken along line I-I' of FIG. 1 .

1 and 2 , the display device includes a substrate SUB, a buffer layer BUF, a gate insulating layer GI, an interlayer insulating layer ILD, a via insulating layer VIA, a transistor TFT, and a pixel. It may include a defining layer (PDL) and an organic light emitting diode (OLED).

The transistor TFT may include an active layer ACT, a gate electrode GAT, a source electrode SE, and a drain electrode DE. The organic light emitting diode OLED may include an anode electrode AND, an emission layer EL, and a cathode electrode CATH.

In some embodiments, the substrate SUB may have a rigid characteristic. In this case, the substrate SUB may include glass, quartz, or the like. Also, in some embodiments, the substrate SUB may have a flexible characteristic. In this case, the substrate SUB may include plastic or the like. For example, the substrate SUB may include polyimide.

The buffer layer BUF may be disposed on the substrate SUB. For example, the buffer layer BUF may include silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON), or the like. The buffer layer BUF may prevent metal atoms or impurities from diffusing into the active layer ACT. Also, the buffer layer BUF may control the rate of heat provided to the active layer ACT during a crystallization process for forming the active layer ACT.

The active layer ACT may be disposed on the buffer layer BUF. In some embodiments, the active layer ACT may include a silicon semiconductor. For example, the active layer ACT may include amorphous silicon, polycrystalline silicon, or the like. Alternatively, in some embodiments, the active layer ACT may include an oxide semiconductor. For example, the active layer ACT may include indium-gallium-zinc oxide (IGZO), indium-gallium oxide (IGO), indium-zinc oxide (IZO), or the like.

The gate insulating layer GI may be disposed on the buffer layer BUF. The gate insulating layer GI may be disposed to cover the active layer ACT. The gate insulating layer GI may include an insulating material. For example, the gate insulating layer GI may include silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON), or the like.

The gate electrode GAT may be disposed on the gate insulating layer GI. The gate electrode GAT may overlap the active layer ACT. A signal and/or a voltage may flow through the active layer ACT in response to a gate signal provided to the gate electrode GAT. In an embodiment, the gate electrode GAT may include a metal, an alloy, a metal oxide, a transparent conductive material, or the like. For example, the gate electrode GAT may include silver (Ag), an alloy containing silver, molybdenum (Mo), an alloy containing molybdenum, aluminum (Al), an alloy containing aluminum, or aluminum nitride. (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), titanium (Ti), tantalum (Ta), platinum (Pt) , scandium (Sc), indium tin oxide (ITO), indium zinc oxide (IZO), and the like.

The interlayer insulating layer ILD may be disposed on the gate insulating layer GI. The interlayer insulating layer ILD may be disposed to cover the gate electrode GAT. In an embodiment, the interlayer insulating layer ILD may include an insulating material. For example, the interlayer insulating layer ILD may include silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON), or the like.

The source electrode SE and the drain electrode DE may be disposed on the interlayer insulating layer ILD. The source electrode SE and the drain electrode DE may contact the active layer ACT. In an embodiment, the source electrode SE and the drain electrode DE may include a metal, an alloy, a metal oxide, a transparent conductive material, or the like. For example, the source electrode SE and the drain electrode DE may include silver (Ag), an alloy containing silver, molybdenum (Mo), an alloy containing molybdenum, aluminum (Al), or aluminum. Alloys containing Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), indium zinc oxide (IZO), and the like.

The via insulating layer VIA may be disposed on the interlayer insulating layer ILD. The via insulating layer VIA may be disposed to cover the source electrode SE and the drain electrode DE. In an embodiment, the via insulating layer VIA may include an organic insulating material. Accordingly, the via insulating layer VIA may have a substantially flat top surface. For example, the via insulating layer VIA may include a photoresist, a polyacrylic resin, a polyimide resin, an acrylic resin, or the like.

The anode electrode AND may be disposed on the via insulating layer VIA. The anode electrode AND may contact the drain electrode DE. In an embodiment, the anode electrode AND may include a metal, an alloy, a metal oxide, a transparent conductive material, or the like. For example, the anode electrode AND may include silver (Ag), an alloy containing silver, molybdenum (Mo), an alloy containing molybdenum, aluminum (Al), an alloy containing aluminum, or aluminum nitride. (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), titanium (Ti), tantalum (Ta), platinum (Pt) , scandium (Sc), indium tin oxide (ITO), indium zinc oxide (IZO), and the like.

The pixel defining layer PDL may be disposed on the via insulating layer VIA. An opening exposing the anode electrode AND may be formed in the pixel defining layer PDL. In an embodiment, the pixel defining layer PDL may include an organic material. For example, the pixel defining layer PDL may include a photoresist, a polyacrylic resin, a polyimide resin, an acrylic resin, or the like.

In some embodiments, the pixel defining layer PDL may include the resin composition. That is, the pixel defining layer PDL may be formed using a resin composition including the polyimide, the ultraviolet absorber, and the N-methyl-2-pyrrolidone. .

The emission layer EL may be disposed on the anode electrode AND. The emission layer EL may include an organic material emitting light of a predetermined color. The light emitting layer EL may emit the light based on a potential difference between the anode electrode AND and the cathode electrode CATH.

In addition, the light emitting layer EL may include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). It may include at least one.

The cathode electrode CATH may be disposed on the emission layer EL. The cathode electrode CATH may include silver metal, an alloy, a metal oxide, a transparent conductive material, or the like. For example, the cathode electrode CATH may include silver (Ag), an alloy containing silver, molybdenum (Mo), an alloy containing molybdenum, aluminum (Al), an alloy containing aluminum, or aluminum nitride. (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), titanium (Ti), tantalum (Ta), platinum (Pt) , scandium (Sc), indium-tin oxide (ITO), indium-zinc oxide (IZO), and the like.

At least a portion of each of the layers constituting the above-described display device may be formed by an inkjet printing process. Recently, the display device has been enlarged, and a larger number of pixels are disposed in the same area. In order to efficiently perform an inkjet process on the display device, an inkjet printing device has also been enlarged. In addition, as the density at which pixels are disposed increases, the inkjet printing process needs to be performed more precisely. Hereinafter, embodiments of the present invention capable of a precise inkjet printing process will be described with reference to FIG. 3 or less.

3 and 4 are views illustrating an inkjet printing apparatus according to embodiments of the present invention.

3 and 4 , the inkjet printing apparatus may include a substrate stage 2 , a gantry, a base layer 5 , and a maintenance stage 6 . A substrate 1 may be loaded or unloaded on the substrate stage 2 . The gantry may include a gantry stage 3 and a gantry frame 4 . The gantry stage 3 is connected to the gantry frame 4 to move.

After the substrate 1 is loaded on the substrate stage 2 , when the inkjet printing process is completed, the substrate 1 should be unloaded on the substrate stage 2 . To this end, the substrate stage 2 may move in the first direction Y. Although the substrate stage 2 is illustrated to be movable only in the first direction Y in FIG. 3 , this is exemplary and the substrate stage 2 may be moved in a second direction intersecting the first direction Y if necessary. It can also move in the direction (X).

The gantry stage 3 may be connected to the gantry frame 4 and move in the second direction X. Accordingly, the gantry stage 3 may move onto the maintenance stage 6 . In some embodiments, an inkjet head may be connected to the gantry stage 3 . During an inkjet printing process using the inkjet head, a problem may occur in the inkjet head. For example, the discharge port of the inkjet head may be blocked. In order to solve such a problem, the gantry stage 3 may be moved onto the maintenance stage 6 to maintain the inkjet head. That is, the gantry stage 3 may move in the second direction X while being connected to the gantry frame 4 .

The base layer 5 may provide a base space in which the above-described components are disposed. That is, the substrate stage 2 , the gantry, the maintenance stage 6 , and the like may be disposed on the base layer 5 .

5 and 6 are views illustrating an inkjet printing apparatus according to embodiments of the present invention. 5 and 6 are detailed views of the inkjet printing apparatus of FIGS. 3 and 4 . Accordingly, a description of the overlapping configuration will be omitted.

3 to 6 , the inkjet printing apparatus includes an ink supply box 7 , a plurality of inkjet heads 8 , an inkjet head assembly 9 on which the inkjet heads 8 are mounted, and an actuator 10 . ), the plurality of ink supply pipes 11 , the coupler 12 , the plurality of ink storage members 13 , the inkjet head assembly 9 and the ink storage members 13 to move in the third direction Z It may include a lifting stage 14 , a driving circuit 15 , an inkjet head driving assembly 16 including the driving circuit 15 , and a connection cable 17 . Here, the third direction (Z) may be defined as a direction perpendicular to the first direction (Y) and the second direction (X).

A plurality of ink storage members 13 may be disposed in the ink supply box 7 . The ink storage member 13 may include an ink storage tank and a control valve. Ink may be stored in the ink storage tank of the ink storage member 13 . The ink storage member 13 may be connected to the inkjet heads 8 by the ink supply pipes 11 . Ink stored in the ink storage member 13 may flow to the inkjet heads 8 through the ink supply pipe 11 . Thereafter, the ink discharged from the inkjet heads 8 may be used for manufacturing a display device.

In some embodiments, a first distance by which the inkjet heads 8 are spaced apart from each other may be smaller than a second distance by which the ink storage members 13 are spaced apart from each other. Accordingly, it is possible to secure a wide space in which the ink supply pipes 11 connecting the inkjet heads 8 and the ink storage members 13 are disposed in an area adjacent to the ink storage members 13 . . In other words, in an area adjacent to the inkjet heads 8 , the ink supply pipes 11 may be densely disposed with each other. Accordingly, when a problem (eg, tube blockage, etc.) occurs in the ink supply pipes 11 , it is better to maintain the ink supply pipes 11 in an area adjacent to the ink storage members 13 . It could be easier.

In addition, as the second distance is greater than the first distance, the coupler 12 for connecting the ink supply pipe 11 to and from the ink storage member 13 to be detachably attached can be easily used. For example, as the second distance is widened, a coupler 12 having a relatively large size may be used. As the coupler 12, a leak-proof valve type may be used. As a result, there is no need to discharge ink every time the ink supply pipe 11 is detached from the ink storage member 13 , so that the maintainability of the inkjet printing apparatus can be improved.

However, in some embodiments, the ink supply pipes 11 and the ink storage members 13 may be connected to each other through a multi-joint connector or similar detachable pipe connection members.

The inkjet heads 8 may be mounted on the inkjet head assembly 9 . In this case, the inkjet head assembly 9 may adjust the height and inclination of the inkjet heads 8 so that ink is precisely discharged to the substrate. As the size of the display device increases and the density at which pixels are arranged increases, it is necessary to precisely control the inkjet heads 8 .

The height and inclination of the inkjet head assembly 9 may be adjusted by the actuator 10 . The actuator 10 may adjust the distance between the inkjet head assembly 9 and the substrate by adjusting the length in the third direction Z.

In some embodiments, the actuator 10 may be plural. For example, the number of actuators 10 may be three, and the three actuators 10 may form an equilateral triangle and be spaced apart from each other. Only some of the plurality of actuators 10 may adjust the length in the third direction Z to adjust the inclination of the inkjet head assembly 9 . Accordingly, the inkjet printing apparatus may discharge ink while the inkjet head assembly 9 is disposed parallel to the substrate.

As described above, since the actuator 10 is disposed adjacent to the inkjet heads 8 , the inkjet printing apparatus can adjust the height and inclination of the inkjet heads 8 with minimal movement. When the actuator 10 adjusts the height and inclination of other components (eg, the ink supply box 7, etc.) together, the moving width of the inkjet heads 8 may be increased. Accordingly, it is preferable that the actuator 10 be disposed adjacent to the inkjet heads 8 to adjust the height and inclination of the inkjet heads 8 with minimal movement.

The lifting stage 14 may be mounted on the gantry. The lifting stage 14 may move the inkjet head assembly 9 and the ink storage members 13 in the third direction Z. The inkjet printing apparatus may adjust the distance between the substrate and the inkjet heads 8 using the elevating stage 14 and the actuator 10 .

The driving circuit 15 may be disposed in the inkjet head driving assembly 16 . The driving circuit 15 may generate a driving signal so that the inkjet head 8 may discharge ink. The inkjet heads 8 may be connected to the ink storage members 13 by the connecting cable 17 . The driving signal may be transmitted to the inkjet heads 8 through the connection cable 17 . In embodiments, the ink storage member 8 and the inkjet head driving assembly 16 may each be connected to the gantry at the same side of the gantry.

However, in some embodiments, the driving circuit 15 may be disposed in the ink supply box 7 . In this case, since the inkjet head driving assembly 16 does not need to be separately disposed, the size of the inkjet printing apparatus may be reduced.

7 and 8 are views illustrating an inkjet printing apparatus according to embodiments of the present invention. 7 and 8 may be substantially the same as in FIGS. 5 and 6 except for a position in which the inkjet head driving assembly 16 is disposed in FIGS. 5 and 6 . Accordingly, a description of the overlapping configuration will be omitted.

Referring to FIGS. 3, 4, 7 and 8 , a plurality of pipes and cables may be disposed in the inkjet printing apparatus. For example, ink supply pipes 11 connecting the ink storage member 13 and the inkjet heads 8 may be disposed. In addition, a connection cable 17 connecting the inkjet heads 8 and the inkjet head driving assembly 16 may be disposed.

As the inkjet printing apparatus becomes larger and more complex in structure, the number of the ink supply pipes 11 and the connection cable 17 may also increase. Accordingly, the structure of the portion where the ink supply pipes 11 and the connection cable 17 are respectively connected to the inkjet heads 8 is complicated, and the ink supply pipes 11 and the connection cable 17 are complicated. If a problem occurs in a portion connected to each of the inkjet heads 8 , maintenance may be difficult.

Accordingly, the ink supply box 7 and the inkjet head driving assembly 16 may be disposed on different sides of the gantry. For example, the ink supply box 7 is disposed in a direction opposite to the first direction Y of the gantry, and the inkjet head driving assembly 16 is disposed in the first direction Y of the gantry. can be placed.

9 and 10 are views illustrating an inkjet printing apparatus according to embodiments of the present invention. 9 and 10 are detailed views of the inkjet printing apparatus of FIGS. 3 and 4 . Accordingly, a description of the overlapping configuration will be omitted.

3, 4, 9 and 10 , the inkjet printing apparatus includes a plurality of ink supply boxes 7a and 7b, a plurality of inkjet heads 8, and the inkjet heads 8 are mounted. An inkjet head assembly 9, an actuator 10, a plurality of ink supply pipes 11a, 11b, a plurality of couplers 12a, 12b, a plurality of ink storage members 13, an inkjet head assembly 9 and a plurality of inkjet head driving assemblies including an elevation stage 14 for moving the ink storage members 13 in the third direction Z, at least one driving circuit 15 , and the driving circuit 15 ( 16a, 16b), and a plurality of connection cables 17a, 17b.

9 and 10 may be substantially the same as FIGS. 4 and 5 except that an ink supply box 7b and an inkjet head driving assembly 16b are additionally disposed in the first direction Y of the gantry. have. Accordingly, a description of the overlapping configuration will be omitted.

As the ink supply boxes 7a and 7b are disposed on both sides of the gantry, the ink storage members 13 may also be disposed on both sides of the gantry. Accordingly, even if the ink storage members 13 are spaced apart from each other at a wider interval than when they are arranged on one side of the gantry, they may all be connected to the inkjet heads 8 . Accordingly, since the ink supply pipes 11a and 11b are also spaced apart from each other, a space can be widely used, and maintenance of the inkjet printing apparatus can be facilitated.

For example, the ink supply box 7b disposed in the first direction Y of the gantry is connected to the inkjet heads 8 disposed on the odd-numbered line, and the inkjet heads 8 disposed on the even-numbered line are connected. ) may be connected to an ink supply box 7a disposed in a direction opposite to the first direction Y of the gantry.

In this case, an inkjet head driving assembly 16a disposed in a direction opposite to the first direction Y of the gantry is connected to the inkjet heads 8 disposed on the odd-numbered line, and disposed on the even-numbered line An inkjet head driving assembly 16b disposed in the first direction Y of the gantry may be connected to the inkjet heads 8 .

The inkjet printing apparatus according to exemplary embodiments of the present invention may be applied to a method of manufacturing a display device included in a computer, a notebook computer, a mobile phone, a smart phone, a smart pad, a PMP, a PDA, an MP3 player, etc. .

In the above, the inkjet printing apparatus according to the exemplary embodiments of the present invention has been described with reference to the drawings, but the described embodiments are exemplary and are not departing from the technical spirit of the present invention described in the claims below. It may be modified and changed by those of ordinary skill in the art.

1: substrate 2: stage
3: Gantry stage 4: Gantry frame
5: Base layer 6: Maintenance stage
7: Ink supply box 8: Inkjet head
9: inkjet head assembly 10: actuator
11: ink supply pipe 12: coupler
13: ink storage member 14: elevating stage
15: drive circuit 16: inkjet head drive assembly
17: connecting cable

Claims (14)

a substrate stage movable in a first direction with a substrate loaded thereon;
an inkjet head assembly including a plurality of inkjet heads spaced apart from each other by a first interval from the substrate to discharge ink to the substrate;
a plurality of ink storage members respectively connected to the plurality of inkjet heads by a plurality of ink supply pipes on the inkjet head assembly and spaced apart from each other by a second interval wider than the first interval; and
and an actuator connected to the inkjet head assembly between the plurality of inkjet storage members and the inkjet head assembly to adjust a tilt of the inkjet head assembly. The inkjet printing apparatus of claim 1, wherein the actuator is capable of adjusting a distance between the inkjet head assembly and the substrate stage. The method of claim 1,
and a gantry for moving the inkjet head assembly and the plurality of ink storage members in a second direction crossing the first direction on the substrate stage. The inkjet printing apparatus of claim 3 , wherein the plurality of ink storage members are connected to the gantry in the first direction of the gantry. 5. The method of claim 4,
The inkjet printing apparatus of claim 1, further comprising: an inkjet head driving assembly including a driving circuit for driving the plurality of inkjet heads and connected to each of the plurality of inkjet heads by a connection cable. The inkjet printing apparatus of claim 5 , wherein the inkjet head driving assembly is connected to the gantry and the inkjet heads in the first direction of the gantry. The inkjet printing apparatus of claim 5 , wherein the inkjet head driving assembly is connected to the gantry and the inkjet heads in a third direction opposite to the first direction of the gantry. 5. The method of claim 4, wherein the plurality of ink storage members comprises an inkjet head driving assembly including a driving circuit for driving the plurality of inkjet heads;
and the inkjet head driving assembly is connected to each of the plurality of inkjet heads by a connection cable. The inkjet printing apparatus of claim 3 , wherein the gantry is capable of adjusting a distance between the plurality of inkjet heads and the plurality of ink storage members and the substrate stage. The inkjet printing apparatus of claim 3 , wherein the plurality of ink storage members are connected to the gantry in the first direction of the gantry and in a third direction opposite to the first direction. 11. The method of claim 10,
An inkjet printing apparatus comprising a driving circuit for driving the plurality of inkjet heads, and further comprising a plurality of inkjet head driving assemblies connected to each of the plurality of inkjet heads by a connection cable. The inkjet printing apparatus of claim 11 , wherein the inkjet head driving assemblies are connected to the gantry and the inkjet heads in the first direction and the third direction of the gantry. 4. The method of claim 3,
and a maintenance stage disposed in the second direction of the substrate stage and configured to maintain the plurality of inkjet heads. The method of claim 1,
The plurality of ink supply pipes are connected to each of the plurality of ink storage members by a coupler.

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