Apparatus for manufacturing display device

Abstract

The utility model relates to an apparatus for manufacturing a display device. The apparatus for manufacturing a display device includes: a stage; an ejection head overlapping the stage, in which the ejection head includes a main body member and a nozzle member, in which the main body member accommodates ink, and the nozzle member includes a nozzle tip and a first housing surrounding the nozzle tip; and a detection sensor interposed between the nozzle tip and the first housing.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2023-0102644 filed on August 7, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] Embodiments of the present disclosure relate to an apparatus for manufacturing a display device. Background Art

[0004] With the advancement of the information society, there is an increasing demand for display devices for displaying images in various forms. For example, display devices may take the form of flat panel display devices such as liquid crystal displays (LCDs), field emission displays (FEDs), and light-emitting display panels. Light-emitting display devices may include organic light-emitting display devices including organic light-emitting diode (OLED) components or light-emitting diode (LED) display devices including inorganic LEDs.

[0005] In addition, during the manufacture of the display device, processes such as inkjet, dispenser, and screen printing processes can be utilized. In particular, the dispenser process can accurately and quickly dispense high-viscosity ink, prevent ink overflow when using high-viscosity ink, and facilitate easy adjustment of ink discharge volume. Utility Model Content

[0006] According to an embodiment of the present disclosure, an apparatus for manufacturing a display device includes: a stage; an ejection head overlapping the stage, wherein the ejection head includes a main body part and a nozzle part, wherein the main body part contains ink, and the nozzle part includes a nozzle tip and a first shell surrounding the nozzle tip; and a detection sensor inserted between the nozzle tip and the first shell.

[0007] In an embodiment of the present disclosure, the detection sensor surrounds the nozzle tip.

[0008] In an embodiment of the present disclosure, the detection sensor is interposed between the nozzle tip and the first housing in a direction different from an extending direction of the nozzle tip.

[0009] In an embodiment of the present disclosure, the detection sensor is provided outside the main body member.

[0010] In an embodiment of the present disclosure, the detection sensor has a ring shape.

[0011] In an embodiment of the present disclosure, the detection sensor is a pressure sensor.

[0012] In an embodiment of the present disclosure, a detection sensor includes a first electrode, a second electrode, and a piezoelectric body provided between the first electrode and the second electrode.

[0013] In the embodiment of the present disclosure, the second electrode surrounds the piezoelectric body, and the piezoelectric body surrounds the first electrode.

[0014] In an embodiment of the present disclosure, a direction in which the first electrode, the piezoelectric body, and the second electrode are stacked is perpendicular to an extending direction of the nozzle tip.

[0015] In an embodiment of the present disclosure, a direction in which the first electrode, the piezoelectric body, and the second electrode are stacked is the same as an extending direction of the nozzle tip.

[0016] In an embodiment of the present disclosure, the device also includes: a head driving unit that moves the injection head; and a control device that controls the operation of the injection head, wherein the control device includes: a signal processing circuit that receives a first signal from the detection sensor; and a drive control circuit that receives a second signal from the signal processing unit, and wherein the drive control circuit provides a third signal to the head driving unit.

[0017] In an embodiment of the present disclosure, the first signal includes information on a contact state of the nozzle tip and the object.

[0018] In an embodiment of the present disclosure, the second signal includes information on at least one of a contact position and a contact strength of the nozzle tip.

[0019] In an embodiment of the present disclosure, the third signal is used to control the injection head.

[0020] In an embodiment of the present disclosure, the device further includes: an output device that receives an output signal from the signal processing circuit, wherein the output device outputs at least one of an image and a sound when receiving the output signal.

[0021] In an embodiment of the present disclosure, the apparatus further comprises: an image sensor for capturing an image of the ejection head, wherein the output device receives an image data signal from the image sensor by receiving an output signal from the signal processing circuit.

[0022] In an embodiment of the present disclosure, the apparatus further includes a first nozzle pipe connecting the body part and the nozzle part to each other, wherein the nozzle tip includes a coupling portion coupled to the first nozzle pipe.

[0023] In an embodiment of the present disclosure, the nozzle member further includes a sealing portion provided in the receiving portion of the body member, and the sealing portion surrounds the first nozzle tube.

[0024] In an embodiment of the present disclosure, the nozzle member further includes a first fixing portion provided between the first housing and the nozzle tip, and the detection sensor is interposed between the first fixing portion and the nozzle tip.

[0025] According to an embodiment of the present disclosure, an apparatus for manufacturing a display device includes: an ejection head including a nozzle tip and a first shell surrounding the nozzle tip; a detection sensor inserted between the nozzle tip and the first shell, wherein the detection sensor surrounds the nozzle tip; and an ink supply line connected to the ejection head. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other aspects and features of the present disclosure will become more apparent by describing in detail embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0027] Figure 1 is a perspective view of an apparatus for manufacturing a display device according to an embodiment of the present disclosure;

[0028] Figure 2 is a side view of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure;

[0029] Figure 3 yes Figure 2 A schematic cross-sectional perspective view of region A;

[0030] Figure 4 yes Figure 2 Another schematic cross-sectional perspective view of region A;

[0031] Figure 5 is a perspective view of a detection sensor according to an embodiment of the present disclosure;

[0032] Figure 6 yes Figure 4 a cross-sectional view of region B;

[0033] Figure 7 is a block diagram illustrating an operating method of a control device according to an embodiment of the present disclosure;

[0034] Figure 8 is a schematic cross-sectional perspective view illustrating an operating method of a display device according to an embodiment of the present disclosure;

[0035] Figure 9 is a cross-sectional perspective view of a nozzle component of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure;

[0036] Figure 10 yes Figure 9 Another cross-sectional perspective view of the nozzle component;

[0037] Figure 11is a cross-sectional perspective view of a detection sensor according to an embodiment of the present disclosure;

[0038] Figure 12 yes Figure 10 a cross-sectional view of region C;

[0039] Figure 13 is a cross-sectional perspective view of a nozzle component of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure;

[0040] Figure 14 is another cross-sectional perspective view of a nozzle component of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure;

[0041] Figure 15 yes Figure 14 a cross-sectional view of region D of ; and

[0042] Figure 16 is a cross-sectional view illustrating how to manufacture a display device using an apparatus for manufacturing a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be implemented in different forms and should not be construed as limited to the present disclosure.

[0044] It will also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Throughout the specification and drawings, like reference numerals may refer to like components, and thus, repeated description may be omitted.

[0045] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0046] Figure 1 is a perspective view of an apparatus for manufacturing a display device according to an embodiment of the present disclosure.

[0047] refer to Figure 1 , an apparatus 1 for manufacturing a display device can eject ink onto a target substrate S. The apparatus 1 may be an ink jet apparatus for ejecting ink. For example, the apparatus 1 may be a dispenser apparatus for ejecting ink through a nozzle.

[0048] The apparatus 1 may be used to manufacture a display device. Examples of the display device include a liquid crystal display (LCD) device, an organic light emitting display device, and an inorganic light emitting display device, but the present disclosure is not limited thereto.

[0049] The apparatus 1 may include a stage 100 , a stage driving unit 200 , an ejection head 300 , a head driving unit 400 , an ink supply device 500 , a vision device 600 , a control device 700 , and an output device 800 .

[0050] The stage 100 may provide a space for accommodating a target substrate S to be placed thereon. Here, the target substrate S may be a display device, but the present disclosure is not limited thereto. The stage 100 may have a flat shape. The planar configuration of the stage 100 may be similar to the planar configuration of the target substrate S. For example, the planar configuration of the stage 100 may be approximately rectangular, but the present disclosure is not limited thereto.

[0051] The stage driving unit (or stage driver) 200 may move the stage 100. For example, the stage driving unit 200 may provide a driving force to the stage 100 to move the stage 100 in the first direction DR1. The stage 100 may be disposed on the stage driving unit 200.

[0052] The first direction DR1 and the second direction DR2 are horizontal directions that intersect with each other. For example, the first direction DR1 and the second direction DR2 may be orthogonal to each other. The third direction DR3 intersects with the first direction DR1 and the second direction DR2 and may be a vertical direction that is substantially perpendicular to the first direction DR1 and the second direction DR2. In this specification, the first side in each of the first direction DR1, the second direction DR2, and the third direction DR3 may indicate the direction pointed by the arrow for the corresponding direction in each of the drawings, and the second side in each of the first direction DR1, the second direction DR2, and the third direction DR3 may indicate the direction opposite to the direction pointed by the arrow for the corresponding direction. When not explicitly mentioned, each of the first direction DR1, the second direction DR2, and the third direction DR3 may indicate both sides in the corresponding direction.

[0053] In an embodiment of the present disclosure, the stage driving unit 200 may include a first guide rail 210 and a second guide rail 220. The first guide rail 210 and the second guide rail 220 may extend along a first direction DR1. The first guide rail 210 and the second guide rail 220 may be spaced apart from each other along a second direction DR2.

[0054] In an embodiment of the present disclosure, the stage driving unit 200 may include an actuator and / or a motor.

[0055] The ejection head 300 may eject ink onto the target substrate S. The ejection head 300 may eject ink onto a first surface (e.g., a top surface) of the target substrate S fixed on a first side in the third direction DR3 of the stage 100. The ejection head 300 may be a dispenser capable of ejecting a single droplet of liquid ink in each ejection event.

[0056] The injection head 300 may be disposed on a first side in the third direction DR3 of the stage 100. For example, the injection head 300 may face the top surface of the stage 100. For example, the injection head 300 may be positioned above the stage 100 in the third direction DR3.

[0057] The spray head 300 may include a detection sensor ( Figure 3 Since the apparatus 1 includes the detection sensor PZE, the apparatus 1 can automatically control the position of the ejection head 300. Figure 3 Description of the detection sensor PZE.

[0058] The head driving unit (or head driver) 400 may move the ejection head 300. For example, the head driving unit 400 may provide a driving force to the ejection head 300 to move the ejection head 300 in the first direction DR1, the second direction DR2, and the third direction DR3.

[0059] In an embodiment of the present disclosure, the head driving unit 400 may include a first horizontal head driver 410 , a second horizontal head driver 420 , and a vertical head driver 430 .

[0060] The second horizontal head driver 420 may be provided on the first horizontal head driver 410. For example, the second horizontal head driver 420 may be positioned on the surface of the first horizontal head driver 410. For example, the second horizontal head driver 420 may be provided on the top surface of the first horizontal head driver 410. The vertical head driver 430 may be provided on the second horizontal head driver 420. For example, the vertical head driver 430 may be positioned on the surface of the second horizontal head driver 420. For example, the vertical head driver 430 may be positioned on the second side of the second horizontal head driver 420 in the second direction DR2.

[0061] The first horizontal head driver 410 may extend in the second direction DR2. The first horizontal head driver 410 may cause the second horizontal head driver 420 to reciprocate in the second direction DR2. Thus, the ejection head 300 may reciprocate in the second direction DR2. For example, the first horizontal head driver 410 may include an actuator and / or a motor.

[0062] The second horizontal head driver 420 may extend in the first direction DR1. The second horizontal head driver 420 may reciprocate the vertical head driver 430 in the first direction DR1. Thus, the ejection head 300 may reciprocate in the first direction DR1. For example, the second horizontal head driver 420 may include an actuator and / or a motor.

[0063] The vertical head driver 430 may extend in the third direction DR3. The vertical head driver 430 may reciprocate the ejection head 300 in the third direction DR3. Thus, the ejection head 300 may reciprocate in the third direction DR3. For example, the vertical head driver 430 may include an actuator and / or a motor.

[0064] In an embodiment of the present disclosure, the first horizontal head driver 410 may include a first support member 411 and a second support member 412. The first support member 411 and the second support member 412 may be spaced apart from each other along the first direction DR1. Each of the first support member 411 and the second support member 412 may include a horizontal support portion extending in the second direction DR2 and a vertical support portion extending in the third direction DR3. For example, the horizontal support portion may be provided on two vertical support portions.

[0065] The ink supply device 500 can supply ink to the ejection head 300. For example, the ink supply device 500 can supply ink to the ejection head 300 through the ink supply line 510. For example, the ink supply device 500 can include a pump and a storage container. For example, the ink supply device 500 can include a stirring component to maintain the viscosity of the ink.

[0066] The vision device 600 can capture images of the stage 100, the target substrate S, and the ejection head 300. The vision device 600 can collect and provide image data for inspecting the positions of the stage 100, the target substrate S, and the ejection head 300. For example, the vision device 600 can collect and provide image data to confirm that the nozzle member 320 (see FIG. 1 ) of the ejection head 300 is positioned at the position of the ejection head 300. Figure 2 ) and the stage 100 or between the nozzle part 320 and the target substrate S. For example, the vision device 600 may include at least one of an image sensor, a memory, a processor, an input circuit, and an output circuit.

[0067] The visual device 600 may be provided on one side of the stage 100. For example, the visual device 600 may be positioned at the same height as the stage 100 in the third direction DR3. The visual device 600 may be provided on a first side of the stage 100 in the second direction DR2, but the present disclosure is not limited thereto. Furthermore, the visual device 600 may be provided on a second side of the stage 100 in the second direction DR2, on a first side of the stage 100 in the first direction DR1, and / or on a second side of the stage 100 in the first direction DR1.

[0068] The control device (or controller) 700 can control the position of the ejection head 300. For example, the control device 700 can receive a contact signal CS (see FIG. Figure 7 ), and adjusts the position of the ejection head 300 based on the contact signal CS.

[0069] The control device 700 may provide an output signal to the output device 800 to output image data or sound data. For example, the control device 700 may provide an output signal to the output device 800 to receive image data from the visual device 600 and display the received image data.

[0070] Will refer to it later Figure 7 and Figure 8 The operation of the control device 700 will be described.

[0071] The output device 800 may output information about the current state of the apparatus 1 in a form recognizable by the user, such as an image or sound. For example, the output device 800 may output image data received from the visual device 600 to the outside.

[0072] Figure 2 is a side view of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure.

[0073] refer to Figure 1 and Figure 2 The injection head 300 may include a body part 310 and a nozzle part 320 .

[0074] The body part 310 may be connected to the head driving unit 400. For example, the body part 310 may be connected to the vertical head driver 430. Therefore, the ejection head 300 may move in the first, second, and third directions DR1, DR2, and DR3 by receiving a driving force from the head driving unit 400.

[0075] The body part 310 may be connected to the ink supply line 510. The body part 310 may include ink from the ink supply device 500 through the ink supply line 510.

[0076] The body part 310 may include a first housing 311 , a receiving portion 312 , and an agitating member 313 .

[0077] The first housing 311 may form an exterior of the body part 310. The first housing 311 may surround the receiving portion 312 and the stirring part 313. The first housing 311 may at least partially surround the nozzle part 320. The first housing 311 may include an opening that may be connected to the ink supply line 510.

[0078] The receiving portion 312 may receive ink introduced into the body part 310 from the ink supply line 510. The receiving portion 312 may be spatially connected to the ink supply line 510 and the nozzle part 320. The receiving portion 312 may extend in the fourth direction DR4.

[0079] In this specification and the accompanying drawings, the fourth direction DR4 may refer to the same direction as the extending direction of the main body member 310 or the receiving portion 312, and may also refer to the same direction as the extending direction of the nozzle tube from which ink is ejected. Furthermore, in embodiments of the present disclosure, the fourth direction DR4 may be different from the first direction DR1, the second direction DR2, and the third direction DR3. Furthermore, depending on the degree of inclination of the ejection head 300, the fourth direction DR4 may intersect with the first direction DR1, the second direction DR2, and the third direction DR3.

[0080] The stirring member 313 may be positioned inside the receiving portion 312. In an embodiment of the present disclosure, the stirring member 313 may include a rotating roller. The stirring member 313 may regulate the viscosity of the ink by rotating the roller. For example, the roller included in the stirring member 313 may rotate at a consistent frequency per unit time to maintain the viscosity of the ink. When the viscosity of the ink increases, the stirring member 313 may increase the rotational speed of the roller per unit time, and conversely, when the viscosity of the ink decreases, the stirring member 313 may decrease the rotational speed of the roller per unit time.

[0081] The nozzle part 320 may be provided on one side of the body part 310. For example, the nozzle part 320 may be provided on the second side of the body part 310 in the fourth direction DR4. The nozzle part 320 may include a second housing 321 and a nozzle tip 322. Figure 3 and Figure 4 The nozzle assembly 320 is described.

[0082] Figure 3 yes Figure 2 Schematic cross-sectional perspective view of area A. Figure 4 yes Figure 2 Another schematic sectional perspective view of area A.

[0083] refer to Figure 3 and Figure 4 And further reference Figure 2 The nozzle member 320 may include a second housing 321 , a nozzle tip 322 , a first fixing portion 323 , a second fixing portion 324 , a sealing portion 325 , and a first nozzle pipe 326 .

[0084] The second housing 321 may form the exterior of the nozzle member 320. The second housing 321 may surround at least a portion of the nozzle tip 322, the first fixing portion 323, the second fixing portion 324, the sealing portion 325, and at least a portion of the first nozzle tube 326. The second housing 321 may be at least partially surrounded by the first housing 311.

[0085] The nozzle tip 322 may extend in the fourth direction DR4 , and may be surrounded by the second housing 321 , the first fixing portion 323 , and the second fixing portion 324 .

[0086] In an embodiment of the present disclosure, the nozzle tip 322 can be attached to or detached from the second housing 321. For example, the nozzle tip 322 can be inserted into the space defined by the first fixing portion 323 and the second fixing portion 324. The nozzle tip 322 can be coupled to the second housing 321 by the first fixing portion 323 and the second fixing portion 324, and can be separated from the second housing 321 to the outside by applying a force toward the second side in the fourth direction DR4. In addition, when the nozzle tip 322 is coupled to the second housing 321, one end of the nozzle tip 322 in the fourth direction DR4 can be inserted between the first step portion 321a of the second housing 321. Therefore, the nozzle tip 322 can be easily replaced.

[0087] The nozzle tip 322 may include a second nozzle tube 322a extending in the fourth direction DR4. The second nozzle tube 322a may serve as a passage extending through the nozzle tip 322 in the fourth direction DR4. The second nozzle tube 322a may provide a path through which ink, which has moved from the body part 310 to the nozzle part 320, may be ejected through the end (or tip) of the nozzle part 320. The second nozzle tube 322a may be connected to the first nozzle tube 326.

[0088] In an embodiment of the present disclosure, the nozzle tip 322 may include a coupling portion 322b. The coupling portion 322b may protrude from a first end portion of the nozzle tip 322 in the fourth direction DR4 toward the first side in the fourth direction DR4. The outer diameter of the coupling portion 322b may be smaller than the outer diameter of the nozzle tip 322. When the nozzle tip 322 is coupled to the second housing 321, the coupling portion 322b may be surrounded by the first nozzle tube 326. For example, the coupling portion 322b may be inserted into the first nozzle tube 326. In this example, the outer diameter of the coupling portion 322b and the inner diameter of the first nozzle tube 326 may be substantially the same. In a plan view from the fourth direction DR4, the shape of the coupling portion 322b may be the same as the shapes of the nozzle tip 322 and the first nozzle tube 326.

[0089] The first fixing portion 323 and the second fixing portion 324 may be arranged to surround the nozzle tip 322. The second fixing portion 324 may be provided on a first side of the first fixing portion 323 in the fourth direction DR4. The second fixing portion 324 may be provided between the first fixing portion 323 and the receiving portion 312 of the body part 310. For example, the first fixing portion 323 may have a hollow cone shape, and the second fixing portion 324 may have a hollow ring shape.

[0090] The first fixing portion 323 and the second fixing portion 324 can facilitate attachment and detachment of the nozzle tip 322. For example, the second fixing portion 324 can include a ball, and when the ball rotates, the nozzle tip 322 can easily move in the fourth direction DR4 within the second housing 321. Furthermore, since the first fixing portion 323 extends in the fourth direction DR4, the first fixing portion 323 can increase its contact surface with the nozzle tip 322, thereby increasing the fixing force on the nozzle tip 322.

[0091] The first nozzle tube 326 may connect the receiving portion 312 of the body part 310 and the second nozzle tube 322a of the nozzle tip 322 to each other. The first nozzle tube 326 may serve as a path through which ink may move from the receiving portion 312 of the body part 310 to the second nozzle tube 322a of the nozzle tip 322.

[0092] The first nozzle pipe 326 is shown as a separate component from the second housing 321, but the present disclosure is not limited thereto. For example, the first nozzle pipe 326 may be an integral component physically connected to the second housing 321. The first nozzle pipe 326 may be an inner pipe located within the second housing 321.

[0093] The sealing portion 325 may be disposed within the receiving portion 312 of the main body 310. The sealing portion 325 may be arranged to surround at least a portion of the first nozzle tube 326. The sealing portion 325 may increase the coupling force between the first nozzle tube 326 and the receiving portion 312 of the main body 310. The first nozzle tube 326 may protrude into the receiving portion 312, and the sealing portion 325 may be arranged to surround the protruding portion of the first nozzle tube 326. For example, the sealing portion 325 may completely surround the protruding portion of the first nozzle tube 326. Thus, ink within the receiving portion 312 can smoothly move to the first nozzle tube 326.

[0094] The apparatus 1 may further include a detection sensor PZE disposed between the nozzle tip 322 and the second housing 321 or between the nozzle tip 322 and the first fixing portion 323. For example, the detection sensor PZE may be disposed within the second housing 321.

[0095] The detection sensor PZE may surround the nozzle tip 322. The two detection sensors PZE are shown as being spaced apart from each other in the fourth direction DR4, but the present disclosure is not limited thereto. In addition, one detection sensor PZE or three or more detection sensors PZE may be provided. For example, Figure 3 As shown in , the detection sensor PZE may have a tube shape. As another example, the detection sensor PZE may have a ring shape.

[0096] The detection sensor PZE may be disposed between the first fixing portion 323 and the nozzle tip 322. For example, the first fixing portion 323 may surround the detection sensor PZE, and the detection sensor PZE may surround the nozzle tip 322. The detection sensor PZE may be interposed between the second housing 321 and the nozzle tip 322 in a direction different from the extending direction of the nozzle tip 322. For example, the detection sensor PZE may be interposed between the second housing 321 and the nozzle tip 322 in a direction perpendicular to the fourth direction DR4.

[0097] In an embodiment of the present disclosure, the detection sensor PZE may be a pressure sensor. For example, the detection sensor PZE may be a pressure sensor such as a piezoelectric sensor, a piezoresistive sensor, or a capacitive sensor.

[0098] Since the apparatus 1 includes the detection sensors PZE around the nozzle tip 322 , the apparatus 1 can detect any impact applied to the nozzle tip 322 .

[0099] Figure 5 is a perspective view of a detection sensor according to an embodiment of the present disclosure. Figure 6 yes Figure 4 A cross-sectional view of region B.

[0100] refer to Figure 5 and Figure 6 And further reference Figure 3 and Figure 4 , each of the detection sensors PZE may include a first electrode E1, a piezoelectric body E0, a second electrode E2, and a through hole HOL.

[0101] like Figure 5 As shown in , the second electrode E2 may surround the piezoelectric body E0, and the piezoelectric body E0 may surround the first electrode E1. The first electrode E1 may surround the through hole HOL. In other words, the piezoelectric body E0 may be inserted between the first electrode E1 and the second electrode E2. The nozzle tip 322 may be disposed inside the through hole HOL.

[0102] The maximum diameter of the second electrode E2 may be greater than that of the piezoelectric body E0, and the maximum diameter of the piezoelectric body E0 may be greater than that of the first electrode E1. The maximum diameter of the first electrode E1 may be greater than that of the through-hole HOL.

[0103] In an embodiment of the present disclosure, the first electrode E1 and the second electrode E2 may include a conductive material. For example, each of the first electrode E1 and the second electrode E2 may include a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO), an opaque metal, a conductive polymer, or a carbon nanotube (CNT).

[0104] The piezoelectric body E0 may include a piezoelectric material. For example, the piezoelectric body E0 may include at least one of lead zirconate titanate ceramic (PZT), polyvinylidene fluoride (PVDF), and electroactive polymer (EAP).

[0105] like Figure 6 As shown in FIG, in a cross-sectional view taken along the fourth direction DR4, the first fixing portion 323 may be disposed on the second electrode E2, and the second electrode E2 may be disposed on the piezoelectric body E0. The piezoelectric body E0 may be disposed on the first electrode E1, and the first electrode E1 may be disposed on the nozzle tip 322.

[0106] A direction in which the first electrode E1, the piezoelectric body E0, and the second electrode E2 are stacked may be different from an extending direction of the nozzle tip 322. For example, the first electrode E1, the piezoelectric body E0, and the second electrode E2 may be stacked in a direction perpendicular to the fourth direction DR4.

[0107] The detection sensor PZE can detect changes in pressure caused by an external impact applied to the nozzle tip 322. The detection sensor PZE can sense pressure applied along the stacking direction of the first electrode E1, the piezoelectric body E0, and the second electrode E2. For example, the detection sensor PZE can detect pressure applied in multiple directions. For example, the detection sensor PZE can detect pressure applied in a direction perpendicular to the fourth direction DR4. Pressure applied along the stacking direction of the first electrode E1, the piezoelectric body E0, and the second electrode E2 may cause changes in the thickness of the piezoelectric body E0. These changes in thickness may cause positive and negative voltages to be generated in the first electrode E1 and the second electrode E2, respectively. The positive voltage generated in the first electrode E1 can be transmitted to the control device 700 via the first line L1, while the negative voltage generated in the second electrode E2 can be transmitted to the control device 700 via the second line L2.

[0108] Figure 7 is a block diagram illustrating an operating method of a control device according to an embodiment of the present disclosure. Figure 8 is a schematic cross-sectional perspective view illustrating an operating method of a display device according to an embodiment of the present disclosure.

[0109] refer to Figure 7 and Figure 8 , when contact between the nozzle tip 322 and other components is detected by the detection sensor PZE, the control device 700 may control the operation of the spray head 300.

[0110] For example, Figure 8As shown in FIG, before ejecting ink, the nozzle tip 322 needs to contact the top surface of the stage 100 to set the reference position of the ejection head 300 in the third direction DR3. If the user manually manipulates the height of the ejection head 300 in the third direction DR3 by using the vision device 600, the ejection head 300 may move excessively toward the stage 100, potentially causing damage to the nozzle tip 322.

[0111] Once the nozzle tip 322 is detected to be in contact with the stage 100 by the detection sensor PZE, the apparatus 1 may minimize damage to the nozzle tip 322 by adjusting the position of the ejection head 300 by the control device 700 to stop the ejection head 300 through the head driving unit 400 .

[0112] In this example, the nozzle tip 322 can come into contact with the target substrate S even during ink jetting. In this example, the control device 700 can also adjust the position of the ejection head 300. In addition, the control device 700 can notify the user of the contact between the nozzle tip 322 and the target substrate S via the output device 800, enabling real-time detection of any scratches on the target substrate S. Consequently, additional damage to other target substrates S can be prevented in subsequent processes, thereby improving process efficiency.

[0113] In the embodiments of the present disclosure, Figure 7 As shown in , the control device 700 may include a contact signal processing unit (or contact signal processing circuit) 710 and a head driving control unit (or head driving control circuit) 720.

[0114] The contact signal processing unit 710 may receive a contact signal CS from the detection sensor PZE. The contact signal CS may include information regarding the contact state of the nozzle tip 322. For example, the contact signal CS may refer to a voltage generated in the first electrode E1 and the second electrode E2 due to contact between the nozzle tip 322 and another component. The contact signal processing unit 710 may generate a contact data signal CDS that includes data regarding the contact strength and position of the nozzle tip 322 based on the amplitude, frequency, and position of the contact signal CS. For example, the contact data signal CDS may include information regarding at least one of the contact strength and the contact position of the nozzle tip 322.

[0115] The head driving control unit 720 may receive the contact data signal CDS from the contact signal processing unit 710. The head driving control unit 720 may generate a head driving control signal HCS to control the position of the ejection head 300 using the contact data signal CDS.

[0116] Upon receiving the head driving control signal HCS from the head driving control unit 720 , the head driving unit 400 may adjust the position of the ejection head 300 in response to the head driving control signal HCS.

[0117] In addition, the contact signal processing unit 710 may receive a contact signal CS from the detection sensor PZE and generate a contact output signal COS based on the contact signal CS.

[0118] The output device 800 may receive the contact output signal COS from the contact signal processing unit 710. The output device 800 may also receive the image data signal IDS from the vision device 600. The image data signal IDS may include information about the image of the stage 100 and the target substrate S captured by the vision device 600.

[0119] The output device 800 can output an image based on the image data signal IDS received from the visual device 600 via a separate display device. The output device 800 can also output sound via a separate sound device. For example, the image output by the output device 800 can include not only an image of the stage 100 and the target substrate S, but also light from a warning light, and the sound output by the output device 800 can include a warning sound from the warning light. The image and sound output by the output device 800 allow the user to easily identify the contact status between the nozzle tip 322 and the target substrate S.

[0120] The embodiments of the present disclosure will be described below focusing on the differences from the aforementioned embodiments. The same reference numerals are used for corresponding components in both the specification and the drawings, and repeated descriptions of these components are omitted.

[0121] Figure 9 is a cross-sectional perspective view of a nozzle member of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure. Figure 10 yes Figure 9 Another cross-sectional perspective view of the nozzle component. Figure 11 is a cross-sectional perspective view of a detection sensor according to an embodiment of the present disclosure. Figure 12 yes Figure 10 A cross-sectional view of region C of FIG.

[0122] Figures 9 to 12 The implementation method and Figure 3 The embodiments differ in the direction in which the components of each detection sensor PZE are stacked.

[0123] Specifically, refer to Figures 9 to 12 , the detection sensor PZE may have a ring shape. For example, the detection sensor PZE may have a ring shape in the fourth direction DR4. Figure 3 The thickness of their counterparts is small.

[0124] Each of the detection sensors PZE and Figure 3 The detection sensor PZE may have the same structure as their counterparts, and may include a first electrode E1, a piezoelectric body E0, a second electrode E2, and a through hole HOL. Figure 3 The structures of their counterparts are different.

[0125] like Figure 11 As shown in , the second electrode E2 can be provided on the piezoelectric body E0, and the piezoelectric body E0 can be provided on the first electrode E1. For example, the piezoelectric body E0 can be provided vertically between the first electrode E1 and the second electrode E2. The first electrode E1, the piezoelectric body E0, and the second electrode E2 can be provided to surround the through hole HOL. When the nozzle tip 322 is fastened to each of the detection sensors PZE, the first electrode E1, the piezoelectric body E0, and the second electrode E2 can be positioned to surround the nozzle tip 322.

[0126] The first electrode E1, the piezoelectric body E0, and the second electrode E2 may have the same outer diameter and the same inner diameter, but the present disclosure is not limited thereto. In addition, the first electrode E1, the piezoelectric body E0, and the second electrode E2 may have different outer diameters and / or different inner diameters depending on the shape of the nozzle tip 322 disposed within the through hole HOL of each of the detection sensors PZE.

[0127] like Figure 12 , a direction in which the first electrode E1, the piezoelectric body E0, and the second electrode E2 are stacked in each of the detection sensors PZE may be the same as an extending direction of the nozzle tip 322. For example, the first electrode E1, the piezoelectric body E0, and the second electrode E2 may be stacked in each of the detection sensors PZE in a direction parallel to the fourth direction DR4.

[0128] When an external impact is applied to the nozzle tip 322, the detection sensor PZE can sense the pressure change caused by the external impact. The detection sensor PZE can detect pressure applied to the nozzle tip 322 along the stacking direction of the first electrode E1, the piezoelectric body E0, and the second electrode E2 in each of the detection sensors PZE. For example, the detection sensor PZE can detect pressure applied to the nozzle tip 322 along the fourth direction DR4. The thickness of the piezoelectric body E0 in each of the detection sensors PZE can change due to the pressure applied along the stacking direction of the first electrode E1, the piezoelectric body E0, and the second electrode E2 in each of the detection sensors PZE. This thickness change may cause positive and negative voltages to be generated in the first and second electrodes E1, E2, respectively, within each of the detection sensors PZE. The positive voltage generated in the first electrode E1 of each of the detection sensors PZE can be transmitted to the control device 700 via the first line L1, while the negative voltage generated in the second electrode E2 of each of the detection sensors PZE can be transmitted to the control device 700 via the second line L2.

[0129] Figure 13 is a cross-sectional perspective view of a nozzle part of an ejection head of an apparatus for manufacturing a display device according to an embodiment of the present disclosure. Figure 14 is another cross-sectional perspective view of the nozzle member of the ejection head of the apparatus for manufacturing a display device according to an embodiment of the present disclosure. Figure 15 yes Figure 14 A cross-sectional view of region D of FIG.

[0130] Figures 13 to 15 The implementation method and Figure 9 The embodiment of FIG. 1 differs in the position of the detection sensor PZE.

[0131] refer to Figures 13 to 15 The detecting sensor PZE may be interposed between the nozzle tip 322 and the second housing 321 in the extending direction of the nozzle tip 322. For example, the detecting sensor PZE may be disposed adjacent to a first side end portion of the nozzle tip 322 in the fourth direction DR4.

[0132] The nozzle tip 322 may include a coupling portion 322 b and a second step portion 322 c provided in a first side end portion of the nozzle tip 322 .

[0133] In an embodiment of the present disclosure, the coupling portion 322b may protrude from the first side end portion of the nozzle tip 322 toward the first side in the fourth direction DR4. The outer diameter of the coupling portion 322b may be smaller than the outer diameter of the nozzle tip 322. The coupling portion 322b may be surrounded by the first nozzle pipe 326. The coupling portion 322b may be inserted into the first nozzle pipe 326.

[0134] The second stepped portion 322c may be provided on a second side of the coupling portion 322b in the fourth direction DR4. Figure 15 As shown in FIG, in a cross-sectional view taken along the fourth direction DR4, the second stepped portion 322c may extend in a direction perpendicular to the fourth direction DR4.

[0135] The second housing 321 may include a third step portion 321 b opposite to the second step portion 322 c of the nozzle tip 322 .

[0136] The detection sensor PZE may be provided in a space defined by the coupling portion 322b and the second step portion 322c of the nozzle tip 322 and the third step portion 321b of the second housing 321. For example, the detection sensor PZE may be provided between the coupling portion 322b, the second step portion 322c, and the third step portion 321b. Figure 15 As shown in FIG, in a cross-sectional view taken along the fourth direction DR4, a rectangular space may be defined by the coupling portion 322b and the second step portion 322c of the nozzle tip 322 and the third step portion 321b of the second housing 321. Within these rectangular spaces, the detection sensor PZE may be interposed between the nozzle tip 322 and the second housing 321 in the fourth direction DR4. In this case, the detection sensor PZE may be disposed around the coupling portion 322b and the first nozzle pipe 326.

[0137] In each of the detection sensors PZE, the first electrode E1, the piezoelectric body E0, and the second electrode E2 may be sequentially arranged in the fourth direction DR4. The first electrode E1 may be disposed adjacent to the second step portion 322c of the nozzle tip 322, and the second electrode E2 may be disposed adjacent to the third step portion 321b of the second housing 321.

[0138] Since the detection sensor PZE is interposed between the nozzle tip 322 and the second housing 321 in the extending direction of the nozzle tip 322, the detection sensor PZE can effectively detect the pressure applied to the nozzle tip 322 in the fourth direction DR4. For example, when pressure is applied to the nozzle tip 322 in the fourth direction DR4, due to the reaction of the second step portion 322c of the nozzle tip 322 and the third step portion 321b of the second housing 321, the detection sensor PZE interposed between the second step portion 322c of the nozzle tip 322 and the third step portion 321b of the second housing 321 can effectively detect the pressure applied in the fourth direction DR4.

[0139] Figure 16 is a cross-sectional view illustrating how to manufacture a display device by using an apparatus for manufacturing a display device according to an embodiment of the present disclosure.

[0140] refer to Figure 16 The display device DD, which is a device capable of displaying video and still images, can be used as a display screen for portable electronic devices such as mobile phones, smartphones, tablet personal computers (PCs), smart watches, watch phones, mobile communication terminals, electronic organizers, e-book readers, portable multimedia players (PMPs), navigation devices, ultra-mobile PCs (UMPCs), and various other products such as televisions (TVs), laptop computers, monitors, billboards, and Internet of Things (IoT) devices. The display device DD may be any one of an organic light-emitting display, an LCD device, a plasma display device, a field emission display device, an electrophoretic display device, an electrowetting display, a quantum dot light-emitting display device, and a micro-LED display device.

[0141] The display device DD may include a display panel DP, a polarizing film PF, an adhesive member ADH, a cover window CW, and a panel cover bottom PB.

[0142] The display panel DP may provide a display screen for displaying images. For example, the display panel DP may be an organic light-emitting display panel, a micro-LED display panel, a nano-LED display panel, a quantum dot light-emitting display panel, an LCD panel, a plasma display panel, an electroluminescent display panel, an electrophoretic display panel, or an electrowetting display panel.

[0143] In an embodiment of the present disclosure, the display panel DP may include a substrate, a display layer including light emitting elements and circuits for driving the light emitting elements, an encapsulation layer for preventing oxygen or moisture from penetrating into the display layer, and a sensor electrode layer for detecting touch input from a user.

[0144] A polarizing film PF may be provided on the first surface of the display panel DP. The polarizing film PF may reduce external glare reflection. For example, the polarizing film PF may include a first base material, a linear polarizer, a phase retarder film such as a λ / 4 plate (or a quarter-wave plate), and a second base material. The first base material, the phase retarder film, the linear polarizer, and the second base material of the polarizing film PF may be stacked in sequence on the display panel DP.

[0145] The cover window CW may be disposed on the polarizing film PF. The cover window CW may have transparency to allow light generated by the display panel DP to pass therethrough. The cover window CW may be formed of glass or plastic. In an embodiment of the present disclosure, the cover window CW may include chemically strengthened glass. In addition, in an embodiment of the present disclosure, the cover window CW may include a polyimide (PI) film.

[0146] The adhesive member ADH may attach the polarizing film PF and the cover window CW to each other. In an embodiment of the present disclosure, the adhesive member ADH may be a pressure sensitive adhesive (PSA), an optically clear adhesive (OCA), or an optically clear resin (OCR).

[0147] The panel cover bottom PB may be disposed on the second surface of the display panel DP. The panel cover bottom PB may be attached to the second surface of the display panel DP via an adhesive material such as PSA.

[0148] The panel cover bottom PB may include at least one of a light blocking member for absorbing incident light from the outside, a buffer member for absorbing external impact, and a heat dissipating member for effectively dissipating heat generated from the display panel DP.

[0149] The display device DD may further include a light blocking member BM provided on a side surface of the display device DD.

[0150] The light blocking member BM may be disposed along the edge of the display device DD. For example, the light blocking member BM may be disposed along the edges of the display panel DP, the polarizing film PF, the adhesive member ADH, and the panel cover bottom PB.

[0151] The light blocking member BM can prevent light LGT from leaking outward from the display device DD. The light blocking member BM may include a light blocking material. For example, the light blocking member BM may include an organic black pigment (such as black carbon particles) and / or light blocking metal particles.

[0152] The light blocking member BM of the display device DD may be formed by the apparatus 1 according to any of the aforementioned embodiments. The apparatus 1 may eject ink "INK" along the periphery of the display device DD. The ink "INK" may be cured to form the light blocking member BM.

[0153] The apparatus 1 can be used to form a light-shielding member BM, but the present disclosure is not limited thereto. For example, the apparatus 1 can also be used to form other members or components of the display device DD. For example, the apparatus 1 can also be used to apply an adhesive member ADH, coat a panel bottom cover PB, or apply organic materials within the display panel DP to form light-emitting elements.

[0154] While the present disclosure has been described with reference to embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure.

Claims

1. An apparatus for manufacturing a display device, characterized in that: include: tower; an ejection head overlapping the stage, wherein the ejection head includes a body part and a nozzle part, wherein the body part accommodates ink, and the nozzle part includes a nozzle tip and a first housing surrounding the nozzle tip; and A detection sensor is inserted between the nozzle tip and the first housing.

2. The device according to claim 1, characterized in that The detection sensor surrounds the nozzle tip, and The detection sensor is interposed between the nozzle tip and the first housing in a direction different from an extending direction of the nozzle tip.

3. The device according to claim 1, characterized in that The detection sensor is arranged outside the main body component, and Wherein, the detection sensor has a ring shape.

4. The device according to claim 1, characterized in that The detection sensor is a pressure sensor, and The detection sensor includes a first electrode, a second electrode, and a piezoelectric body arranged between the first electrode and the second electrode.

5. The device according to claim 4, characterized in that The second electrode surrounds the piezoelectric body, The piezoelectric body surrounds the first electrode, and A direction in which the first electrode, the piezoelectric body, and the second electrode are stacked is perpendicular to an extending direction of the nozzle tip.

6. The device according to claim 4, characterized in that A direction in which the first electrode, the piezoelectric body, and the second electrode are stacked is the same as an extending direction of the nozzle tip.

7. The device according to claim 1, characterized in that Also includes: a head driving unit for moving the ejection head; as well as a control device for controlling the operation of the injection head, Wherein, the control device includes: a signal processing circuit, receiving a first signal from the detection sensor; and A driving control circuit receives a second signal from the signal processing circuit; The drive control circuit provides a third signal to the head drive unit. wherein the first signal includes information about the contact state between the nozzle tip and the object, wherein the second signal includes information about at least one of a contact position and a contact strength of the nozzle tip, and Wherein, the third signal is used to control the injection head.

8. The device according to claim 7, characterized in that Also includes: an output device for receiving an output signal from the signal processing circuit; as well as an image sensor for capturing an image of the ejector head, wherein the output device outputs at least one of an image and a sound upon receiving the output signal, and The output device receives the image data signal from the image sensor by receiving the output signal from the signal processing circuit.

9. The device according to claim 1, characterized in that Also includes: a first nozzle pipe connecting the main body part and the nozzle part to each other, wherein the nozzle tip comprises a coupling portion coupled to the first nozzle tube, wherein the nozzle component further comprises a sealing portion disposed in the receiving portion of the body component, and The sealing portion surrounds the first nozzle tube.

10. An apparatus for manufacturing a display device, characterized in that: include: a spray head comprising a nozzle tip and a first housing surrounding the nozzle tip; a detection sensor interposed between the nozzle tip and the first housing, wherein the detection sensor surrounds the nozzle tip; as well as An ink supply line is connected to the ejection head.

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