KR-102960844-B1 - LAMINATE DEVICE

Abstract

The laminating device includes a pressurizing part comprising a side portion having a hyperbolic shape in cross-section and an insert portion protruding from the upper surface of the pressurizing part, and a pressurizing pad for pressing the display panel to bond the display panel and the cover window having a circular shape with one side protruding in a planar view. As the side portion has a hyperbolic shape, the defects of the display device manufactured through the laminating device are improved.

Inventors

• 박진혁
• 이영명
• 이종남
• 이욱재

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260507

Application Date

20210729

Claims (16)

1. A pressure pad for pressing a display panel and a cover window to bond the display panel, the display panel having a circular shape with one side protruding in a planar view, and the pressure pad including a pressure portion having a side portion having a hyperbolic shape in cross-section and an insert portion protruding from the upper surface of the pressure portion; and A laminating device including a stage fixed to the above-mentioned insert.
2. A laminate device according to claim 1, characterized in that the side portion extends 360 degrees in a plane perpendicular to the center of the pressure pad.
3. A laminating device according to claim 1, characterized in that the shape of the stage is identical to the shape of the pressure pad on a flat surface.
4. A laminate device according to claim 3, characterized in that each of the pressure pad and the stage has a circular shape on a flat surface.
5. A laminate device according to claim 4, characterized in that the cover window has a shape with a curved edge in cross-section.
6. A laminate device according to claim 4, characterized in that the cover window has a circular shape on a flat surface.
7. A laminate device according to claim 1, wherein the pressure pad comprises an elastic material.
8. A laminate device according to claim 7, characterized in that the elastic material comprises at least one selected from the group consisting of urethane, rubber, and synthetic resin.
9. A laminate device according to claim 1, characterized in that the pressure pad has a uniform density across the entire surface.
10. A pressure pad comprising a pressure portion having a side portion having a hyperbolic shape in cross-section and an insert portion protruding from the upper surface of the pressure portion, for pressing the display panel to bond the display panel and the cover window for a smart watch; and A laminating device including a stage fixed to the above-mentioned insert.
11. A laminate device according to claim 10, characterized in that the side portion extends 360 degrees in a plane perpendicular to the center of the pressure pad.
12. A laminating device according to claim 10, characterized in that the shape of the stage is identical to the shape of the pressure pad on a flat surface.
13. A laminate device according to claim 12, characterized in that the pressure pad and the stage each have a circular shape on a flat surface.
14. A laminate device according to claim 13, characterized in that the cover window has a shape with a curved edge in cross-section.
15. A laminate device according to claim 13, characterized in that the cover window has a circular shape on a flat surface.
16. A laminate device according to claim 10, wherein the pressure pad comprises an elastic material.

Description

Laminate Device The present invention relates to a laminating device. More specifically, the present invention relates to a laminating device used to manufacture a display device. Recently, flat panel displays (FPDs) that allow for large surface areas, thinness, and lightweight design are widely used as display devices. Among these flat panel displays, liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting displays (OLEDs) are used. Generally, the display device includes a display panel and a cover window for protecting the display panel. The display panel includes a driving element, a light-emitting element, etc. The cover window is attached to the front surface of the display panel. At this time, when the display panel is pressed using a pressure pad, the display panel and the cover window are bonded together. FIG. 1 is a perspective view showing a laminating device according to one embodiment of the present invention. Figure 2 is a cross-sectional view showing the laminating device of Figure 1. Figure 3 is a cross-sectional view illustrating the pressure pad of Figure 1. Figure 4 is a plan view showing a display device manufactured using the laminating device of Figure 1. FIGS. 5 to 7 are cross-sectional views illustrating a method for manufacturing the display device of FIG. 4. Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. Identical components in the drawings are given the same reference numerals, and redundant descriptions of identical components are omitted. FIG. 1 is a perspective view showing a laminating device according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing the laminating device of FIG. 1. Referring to FIGS. 1 and 2, the laminating device (1000) may include a pressure pad (100) and a stage (200). As described below, a display panel (e.g., the display panel (DP) shown in FIG. 4) and a cover window (e.g., the cover window (CW) shown in FIG. 4) can be laminated through the laminating device (1000). The pressure pad (100) may include a pressure portion (110) and an insertion portion (120). In one embodiment, the pressure portion (110) may include a side portion (10) having a hyperbolic shape in cross-section. That is, the pressure portion (110) may have a shape that is recessed inward from the side. In this case, the pressure portion (110) may have a cylindrical shape with a recessed side. Additionally, the side portion (10) may be extended 360 degrees in a plane perpendicular to the center of the pressure pad (100). The insertion part (120) can be defined as the part into which the stage (200) is inserted. The insertion part (120) may protrude from the upper surface of the pressurizing part (110). Specifically, the insertion part (120) may extend in a second direction (D2) from the upper surface of the pressurizing part (110). Additionally, the insertion part (120) may have a cylindrical shape. In one embodiment, the pressure pad (100) may include an elastic material. Examples of materials that can be used for the pressure pad (100) include urethane, rubber, synthetic resin, etc. These may be used alone or in combination with each other. However, the composition of the present invention is not limited thereto, and the pressure pad (100) may include other elastic materials. In one embodiment, the pressure pad (100) may have a uniform density over its entire surface. That is, the mass of the elastic material per unit volume in the first part of the pressure pad (100) and the mass of the elastic material per unit volume in the second part may be the same. The pressure pad (100) may have a polygonal shape on a flat surface. In one embodiment, the pressure pad (100) may have a circular shape on a flat surface. However, the configuration of the present invention is not limited thereto, and the pressure pad (100) may have a different shape on a flat surface. The stage (200) can be placed on the pressure pad (100). Specifically, the stage (200) can be inserted into the insertion portion (120) of the pressure pad (100). That is, the stage (200) can be fixed to the insertion portion (120) of the pressure pad (100). The stage (200) may have a polygonal shape on a plane. In one embodiment, the stage (200) may have a circular shape on a plane. That is, the shape of the stage (200) may be the same as the shape of the pressure pad (100) on a plane. However, the configuration of the present invention is not limited thereto, and the stage (200) may have a different shape on a plane. In a laminating device (1000) according to one embodiment of the present invention, the pressure pad (100) of the laminating device (1000) may include a pressure portion (110) having a side portion (10) having a hyperbolic shape in cross-section and an insertion portion (120) protruding from the upper surface of the pressure portion (110). Additionally, as the side portion (10) of t