KR-20260062213-A - Substrate coating apparatus

KR20260062213AKR 20260062213 AKR20260062213 AKR 20260062213AKR-20260062213-A

Abstract

An embodiment of the present invention provides a substrate coating device, wherein the substrate coating device may include a stage supporting a substrate, a spraying unit that discharges ink in a first direction toward the substrate, a driving unit connected to the spraying unit at the top of the stage and rotating around a preset axis, a detection unit spaced apart from the spraying unit and connected to the driving unit and capturing the spraying unit in a second direction different from the first direction, and a control unit that derives a separation distance between the spraying unit and the substrate using the image of the spraying unit obtained from the detection unit and information of the second direction.

Inventors

주태훈
김병수
홍승민

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260507
Application Date: 20241028

Claims (15)

A stage supporting a substrate; A spraying unit that discharges ink in a first direction toward the substrate; A driving unit connected to the injection unit at the upper part of the stage and rotating around a preset axis; A detection unit spaced apart from the injection unit, connected to the driving unit, and capturing the injection unit in a second direction different from the first direction; and A substrate coating device comprising: a control unit that derives the separation distance between the spraying unit and the substrate using the image of the spraying unit obtained from the detection unit and the information of the second direction.
In paragraph 1, The above detection unit is, An imaging module for acquiring an image of the above injection unit; and A substrate coating device comprising: a tilting unit connected to the imaging module and the driving unit, capable of adjusting the angle formed by the imaging module and the substrate.
In paragraph 2, A substrate coating device in which the above tilting unit is rotatably connected to the above driving unit.
In Paragraph 1, A substrate coating device in which the above-mentioned spraying unit and the above-mentioned detection unit rotate integrally around the rotation axis of the above-mentioned driving unit.
In paragraph 1, A substrate coating device, wherein the first direction is a direction from the outer side to the inner side in the rotational radius direction of the driving unit.
In paragraph 5, A substrate coating device wherein the second direction is a direction facing inward from the outer side in the rotational radius direction of the driving unit and forms a preset angle with the first direction.
In paragraph 6, A substrate coating device in which the angle formed by the first direction and the second direction is 25 degrees or less.
In paragraph 1, A substrate coating device further comprising a housing that accommodates a driving unit and a stage on the inside.
In paragraph 8, A substrate coating device in which the detection unit rotates and/or moves within the internal area of the housing, and the detection unit and the inner surface of the housing are spaced apart by a preset interval.
In paragraph 1, A substrate coating device in which the angle formed by the longitudinal central axis of the injection unit and the substrate is relatively larger than the angle formed by the longitudinal central axis of the detection unit and the substrate.
In paragraph 1, The above control unit is, A substrate coating device that derives the separation distance between the spraying unit and the substrate by using the angle formed by a plane parallel to the substrate and the second direction.
In paragraph 2, A substrate coating device, wherein the control unit controls the operation of the tilting unit so that the shooting direction of the imaging module and the substrate are parallel at a preset time.
In Paragraph 12, A substrate coating device in which the position of the injection unit is fixed at the above preset time.
In paragraph 2, The above control unit is, A substrate dispensing device that limits the rotation and/or movement of the driving unit while the tilting unit is in operation.
In paragraph 2, A substrate coating device in which the rotation axis of the driving unit and the rotation axis of the tilting unit are perpendicular to each other.

Description

Substrate coating apparatus Embodiments of the present invention relate to a substrate coating device. Mobile-based electronic devices are being widely used. In addition to small electronic devices such as mobile phones, tablet PCs have recently become widely used as mobile electronic devices. Such portable electronic devices include a display device to support various functions and to provide visual information, such as images or videos, to the user. Recently, as other components for driving the display device have become miniaturized, the proportion of the display device within the electronic device is gradually increasing, and structures capable of bending from a flat state to a predetermined angle are also being developed. A display device can display an image by applying voltage to a specific molecular arrangement of liquid crystals to change the molecular arrangement, and converting changes in optical properties such as birefringence, optical rotation, dichroism, and light scattering characteristics of the liquid crystal cells that emit light due to this change in molecular arrangement into visual changes. A liquid crystal display device equipped with such a display device includes a backlight comprising a display panel and a light guide plate, and a process of applying ink to the edges of a substrate, such as a display panel, is performed to prevent light leakage to the sides of the display panel. In the process of applying ink to the edges of a substrate, it is important to precisely measure the distance between the ink-applying nozzle tip and the substrate in order to precisely control the area and amount of ink applied. The aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot be considered as prior art disclosed to the general public prior to the filing of the present invention. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a perspective view of a substrate coating device according to one embodiment of the present invention. Figure 2 is a side view of the substrate coating device shown in Figure 1. Figure 3 is a usage diagram illustrating the state in which the substrate coating device of Figure 1 applies ink to a substrate. Figure 4 is a plan view of the substrate coating device shown in Figure 3. Figure 5 is a diagram illustrating a method for deriving the separation distance between a spraying unit and a substrate using the shooting direction of a detection unit. FIG. 6 is a usage state diagram illustrating the usage state of a control unit according to one embodiment of the present invention. FIG. 7 is a cross-sectional view schematically illustrating a display device in which ink is applied by a substrate coating device according to embodiments of the present invention. FIG. 8 is a cross-sectional view showing one subpixel of the display device of FIG. 7. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the following embodiments, when a part such as a unit, area, or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where another unit, area, or component is interposed in between. In the following embodiments, terms such as "connect" or "combine" do not necessarily imply a direct and/or fixed connection or combination of two members unless the context clearly indicates otherwise, nor do they exclude the interposition of another member between the two members. In the drawings, the size of components may