阅读说明：本技术 印刷层形成装置、盖板玻璃及其制造方法 (Print layer forming apparatus, cover glass, and method for manufacturing the cover glass ) 是由 崔汎奎 沈柄烈 于 2020-09-08 设计创作，主要内容包括：提供一种印刷层形成装置、盖板玻璃及其制造方法。印刷层形成装置包括：移印器,包括第一主体部以及撑挡部,所述撑挡部形成在所述第一主体部的一面上,并具有比所述第一主体部窄的厚度且具有向一方向凸出的形状；以及清除器,包括第二主体部以及第一侧壁及第二侧壁,所述第一侧壁及所述第二侧壁与所述第二主体部连接而彼此隔开相对,以使得形成被插入所述撑挡部的槽部。(Provided are a printing layer forming device, cover glass and a manufacturing method thereof. The printing layer forming apparatus includes: a pad printer including a first main body portion and a stopper portion formed on one surface of the first main body portion, having a thickness narrower than the first main body portion, and having a shape protruding in one direction; and a remover including a second body portion and first and second sidewalls connected to the second body portion to be spaced apart from and opposite to each other so as to form a groove portion inserted into the stopper portion.)

1. A printed layer forming apparatus, comprising:

a pad printer including a first main body portion and a stopper portion formed on one surface of the first main body portion, having a thickness narrower than the first main body portion, and having a shape protruding in one direction; and

and a cleaner including a second body part and first and second sidewalls connected to the second body part to be spaced apart from each other to be opposite to each other so that a groove part inserted into the stopper part is formed.

2. The printing layer forming apparatus according to claim 1, wherein,

the groove portion has an inner wall of a shape corresponding to an outer face of the stopper portion.

3. The printing layer forming apparatus according to claim 2, wherein,

the groove portion of the wiper has a width greater than a thickness of the stopper portion.

4. The printing layer forming apparatus according to claim 2, wherein,

the stopper is inserted into the groove of the cleaner in a state where an outer surface of the stopper is spaced apart from an inner wall of the groove.

5. The printing layer forming apparatus according to claim 2, wherein,

the groove portion is spaced apart to surround a part of an outer face of the stopper portion in a state of being inserted into the stopper portion,

a portion of an outer face of the stopper portion is exposed so as not to oppose an inner wall of the groove portion.

6. The printing layer forming apparatus according to claim 5, wherein,

when the stopper is pressed in a state of being inserted into a groove of the cleaner, at least a part of the outer surface comes into contact with an inner wall of the groove.

7. The printing layer forming apparatus according to claim 2, wherein,

the area of the outer face of the retaining portion is larger than the area of the inner wall of the groove portion.

8. The printing layer forming apparatus according to claim 2, wherein,

the protruding end of the stay has a circular shape.

9. The printing layer forming apparatus according to claim 1, wherein,

the spacer portion has a first length measured along the one direction, the first sidewall forms a first outer wall of the groove portion having a second length measured along the one direction,

the second length is shorter than the first length.

10. The printing layer forming apparatus according to claim 9, wherein,

the second outer wall of the slot portion formed by the second side wall has a third length measured along the one direction, and the third length is shorter than the second length.

11. The printing layer forming apparatus according to claim 9, wherein,

the second outer wall of the slot portion formed by the second side wall has a fourth length measured along the one direction, and the fourth length is the same as the second length.

12. A method for manufacturing a cover glass, comprising:

a step of transferring ink to a pad printer including a first main body portion and a stopper portion formed on one surface of the first main body portion and having a shape protruding in one direction;

a step of bringing the pad printer into contact with a cleaner in which a groove portion inserted into the stopper portion is formed to remove at least a part of the ink transferred to the pad printer; and

and a step of bringing the pad printer into contact with a base member to form a printed layer on one surface of the base member.

13. The method for manufacturing a cover glass according to claim 12,

in the step of transferring the ink, the ink is transferred only to the outside of the stopper portion.

14. The method for manufacturing a cover glass according to claim 13,

in the step of removing at least a part of the ink, the stopper is pressurized in a state of being inserted into the groove portion of the cleaner and a part of an outer surface of the stopper is in contact with an inner wall of the groove portion, the ink being an ink transferred to an edge in the outer surface of the stopper is left.

15. The method for manufacturing a cover glass according to claim 12,

the base member includes a first flat portion, a second flat portion opposed to the first flat portion with a space therebetween, and a bent portion connecting the first flat portion and the second flat portion and having a shape bent in one direction.

16. The method for manufacturing a cover glass according to claim 15,

in the step of forming the printed layer, the stopper is inserted into a space defined by the first flat portion and the second flat portion of the base member to be in contact with one surface of the base member, and ink remaining in the stopper is printed on the one surface of the base member.

17. The method for manufacturing a cover glass according to claim 16,

the printed layer is formed on an edge of one surface of the base member, the one surface being opposed to a space surrounded by the first flat portion, the second flat portion, and the bent portion.

18. The method for manufacturing a cover glass according to claim 12,

the stopper of the pad printer has a thickness narrower than the first body portion,

the groove portion of the wiper has a width greater than a thickness of the stopper portion.

19. The method for manufacturing a cover glass according to claim 18,

the stopper is inserted into the groove of the cleaner in a state where an outer surface of the stopper is spaced apart from an inner wall of the groove.

20. A cover glass comprising a display area and a light-shielding area surrounding an outline of the display area, wherein the cover glass comprises:

a base member including a first flat portion, a second flat portion spaced apart from and opposed to the first flat portion, and a bent portion connecting the first flat portion and the second flat portion and bent in one direction; and

a printed layer disposed on the light-shielding region on one surface of the base member,

the printed layer is disposed on an edge of one surface of the base member, the one surface being opposed to a space surrounded by the first flat portion, the second flat portion, and the bent portion.

Technical Field

The present disclosure relates to a printing layer forming apparatus, a cover glass, and a method for manufacturing a cover glass using the same.

Background

With the development of multimedia, the importance of display devices is increasing. In response to this, various Display devices such as an Organic Light Emitting Display (OLED), a Liquid Crystal Display (LCD), and the like are used. Such display devices are mainly applied to various mobile electronic devices, for example, mobile electronic devices such as smart phones, smart watches, and tablet computers, and application examples thereof are diversified.

On the other hand, in various display devices used for mobile devices, a cover glass configured to be transparent is disposed in front of a display panel so that a user can see a flat portion. The display panel is divided into a display area for displaying an actual image and a non-display area defined as an area other than the display area, and the cover glass may be divided into a light-transmitting area corresponding to the display area and an opaque light-shielding area corresponding to the non-display area according to the display panel. In the opaque light-shielding region of the cover glass, a light-shielding member may be disposed or a predetermined ink may be printed in order to locally block light emitted from the display panel.

On the other hand, recently, importance of a display device having a display surface with a part of its area inclined or rounded is increasing. For example, the front cover glass forming the external appearance of the display device is partially formed in a circular shape, so that the aesthetic sense of the display device and the user's grip feeling can be improved.

Disclosure of Invention

The present disclosure addresses the problem of providing a print layer forming apparatus having a shape capable of forming a print layer on one surface of a base member having a flat surface facing each other with a space therebetween and a curved surface connecting the flat surface and the curved surface.

Further, an object to be solved by the present disclosure is to provide a method for manufacturing a cover glass using the above printing layer forming apparatus, and a cover glass.

The problem of the present disclosure is not limited to the above-mentioned problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

A print layer forming apparatus according to an embodiment for solving the problem includes: a pad printer including a first main body portion and a stopper portion formed on one surface of the first main body portion, having a thickness narrower than the first main body portion, and having a shape protruding in one direction; and a remover including a second body portion and first and second sidewalls connected to the second body portion to be spaced apart from and opposite to each other so as to form a groove portion inserted into the stopper portion.

The groove portion may have an inner wall having a shape corresponding to an outer surface of the stopper portion.

The groove portion of the wiper may have a width greater than a thickness of the stopper portion.

The stopper may be inserted into the groove of the cleaner with an outer surface of the stopper spaced apart from an inner wall of the groove.

The groove portion may surround a part of an outer surface of the stopper portion in a spaced manner in a state of being inserted into the stopper portion, and the part of the outer surface of the stopper portion may be exposed so as not to be opposed to an inner wall of the groove portion.

When the stopper is pressed in a state of being inserted into the groove of the wiper, at least a part of the outer surface may contact an inner wall of the groove.

An area of an outer face of the stopper portion may be larger than an area of an inner wall of the groove portion.

The protruding end of the stay may have a circular shape.

The stopper may have a first length measured in the one direction, and the first outer wall of the groove portion formed by the first side wall may have a second length measured in the one direction, the second length being shorter than the first length.

The second outer wall of the groove portion constituted by the second side wall may have a third length measured in the one direction, and the third length may be shorter than the second length.

The second outer wall of the groove portion constituted by the second side wall may have a fourth length measured in the one direction, and the fourth length may be the same as the second length.

A method of manufacturing a cover glass according to an embodiment for solving the problem includes: a step of transferring ink to a pad printer including a first main body portion and a stopper portion formed on one surface of the first main body portion and having a shape protruding in one direction; a step of bringing the pad printer into contact with a cleaner in which a groove portion inserted into the stopper portion is formed to remove at least a part of the ink transferred to the pad printer; and a step of forming a printed layer on one surface of the base member by bringing the pad printer into contact with the base member.

It may be that, in the step of transferring the ink, the ink is transferred only to the outside of the stopper portion.

In the step of removing at least a part of the ink, the stopper may be pressurized in a state of being inserted into the groove portion of the cleaner and a part of an outer surface of the stopper may be in contact with an inner wall of the groove portion, and the ink, which is an ink transferred to an edge in the outer surface of the stopper, may be left.

The base member may include a first flat portion, a second flat portion spaced apart from and opposed to the first flat portion, and a bent portion connecting the first flat portion and the second flat portion and having a shape bent in one direction.

In the step of forming the printed layer, the stopper may be inserted into a space defined by the first flat portion and the second flat portion of the base member to be in contact with one surface of the base member, and the ink remaining in the stopper may be printed on the one surface of the base member.

The printed layer may be formed on an edge of one surface of the base member, the edge being opposed to a space surrounded by the first flat portion, the second flat portion, and the bent portion.

The stopper of the pad printer may have a thickness narrower than that of the first body, and the groove of the cleaner may have a width greater than that of the stopper.

The stopper may be inserted into the groove of the cleaner with an outer surface of the stopper spaced apart from an inner wall of the groove.

A cover glass according to an embodiment for solving the problem includes a display area and a light shielding area surrounding an outline of the display area, the cover glass including: a base member including a first flat portion, a second flat portion spaced apart from and opposed to the first flat portion, and a bent portion connecting the first flat portion and the second flat portion and bent in one direction; and a printed layer disposed in the light-shielding region on one surface of the base member, the printed layer being disposed on an edge of one surface of the base member that faces a space surrounded by the first flat portion, the second flat portion, and the bent portion.

Additional embodiments are also specifically included in the detailed description and drawings.

(effects of disclosure)

The printing layer forming apparatus according to an embodiment includes: a pad printer having a shape protruding in one direction corresponding to the shape of the object; and a cleaner formed with a groove portion to enable insertion of the protruding portion of the pad printer. When ink is transferred to the projecting portion of the pad, the projecting portion of the pad is inserted into the groove portion of the cleaner, and a part of the ink can be removed. In the printing layer forming apparatus, the pad printer and the cleaner can have a specific shape according to the shape of the object on which the printing layer is formed and the position where the printing layer is disposed.

In addition, the present disclosure can manufacture a cover glass having a printed layer formed on a base member including a curved bent portion and a flat portion, using the printed layer forming apparatus. Even if the base member has a shape surrounding a specific space, the pad printer of the printing layer forming apparatus can be inserted into the surrounded space, and the printing layer can be formed on one surface of the base member, which is opposite to the surrounded space.

Effects according to the embodiments are not limited to those exemplified above, and more various effects are included in the specification.

Drawings

Fig. 1 is a perspective view illustrating a cover glass according to an embodiment.

Fig. 2 is a plan view of the cover glass of fig. 1.

Fig. 3 is a rear view of the cover glass of fig. 1.

Fig. 4 and 5 are sectional views of the cover glass of fig. 1.

Fig. 6 is a schematic view of a print layer forming apparatus according to an embodiment.

Fig. 7 is a sectional view of a pad printer included in a printing layer forming apparatus according to an embodiment.

Fig. 8 is a sectional view of a remover included in a printing layer forming apparatus according to an embodiment.

Fig. 9 is a schematic diagram showing a state in which a pad printer is inserted into a cleaner according to an embodiment.

Fig. 10 is a sectional view showing a state where the pad printer of fig. 9 is inserted into a remover.

Fig. 11 is a side view illustrating a state in which the pad printer of fig. 9 is inserted into a cleaner.

Fig. 12 is a sectional view showing a state in which a pad printer is pressurized after being inserted into a remover according to an embodiment.

Fig. 13 is a flowchart illustrating a method of manufacturing a cover glass according to an embodiment.

Fig. 14 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment.

Fig. 15 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment.

Fig. 16 is a sectional view showing a step in the manufacturing process of the cover glass of fig. 15.

Fig. 17 is a sectional view showing a step in the manufacturing process of the cover glass according to an embodiment.

Fig. 18 is a sectional view showing a step in the manufacturing process of the cover glass according to an embodiment.

Fig. 19 is a schematic view showing a part of the ink transferred to the pad printer is removed in the manufacturing process of the cover glass according to an embodiment.

Fig. 20 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment.

Fig. 21 is a schematic view of a cover glass according to another embodiment.

Fig. 22 is a plan view of the cover glass of fig. 21.

Fig. 23 is a sectional view of the cover glass of fig. 21.

Fig. 24 is a schematic view of a print layer forming apparatus according to another embodiment.

Fig. 25 is a schematic diagram showing a state in which a pad printer is inserted into a cleaner according to another embodiment.

Fig. 26 is a schematic view showing a part of the ink transferred to the pad printer is removed in the manufacturing process of the cover glass according to another embodiment.

(description of reference numerals)

10: base member 20: printing layer

100: cover plate glass

300: pad printing device

310: first main body portion 350: propping part

500: cleaner

510: first side wall 520: second side wall

550: second main body part

1000: printing layer forming device

SP1, SP 2: flat portion BP: a bending part BL: bending line

DA: display area NDA: light-shielding area

Detailed Description

Advantages and features of the present disclosure and methods of accomplishing the same may become apparent by reference to the following detailed description of embodiments taken in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be embodied in various forms different from each other, and the embodiments are provided only for the purpose of making the disclosure of the present disclosure complete and for the purpose of fully conveying the scope of the disclosure to those having ordinary knowledge in the art to which the present disclosure pertains, and the present disclosure is limited only by the scope of the claims.

References to elements or layers being "on" other elements or layers are intended to include all instances of the elements or layers being directly on the other elements or intervening layers or other elements. Like reference numerals refer to like elements throughout the specification.

Although the terms first, second, etc. are used for describing various constituent elements, it is apparent that these constituent elements are not limited to these terms. These terms are only used to distinguish one constituent element from another constituent element. Therefore, the first constituent element mentioned below may obviously be the second constituent element within the technical idea of the present disclosure.

The embodiments are described below with reference to the accompanying drawings.

Fig. 1 is a perspective view illustrating a cover glass according to an embodiment. Fig. 2 is a plan view of the cover glass of fig. 1. Fig. 3 is a rear view of the cover glass of fig. 1.

Fig. 2 is a plan view of the cover glass 100 of fig. 1 viewed in an upper direction, i.e., a third direction (Z-axis direction), and fig. 3 is a rear view of the cover glass 100 of fig. 1 viewed in a lower direction, i.e., a direction opposite to the third direction (Z-axis direction).

In the present specification, "upper", "top" and "upper" refer to the Z-axis direction, and "lower", "bottom" and "bottom" refer to the opposite direction of the Z-axis direction. In addition, "left", "right", "upper" and "lower" refer to directions when the cover glass 100 is viewed on a plane. For example, "left" refers to the opposite direction of the X-axis direction, "right" refers to the X-axis direction, "up" refers to the Y-axis direction, and "down" refers to the opposite direction of the Y-axis direction.

Referring to fig. 1 to 3, the cover glass 100 may have a rectangular shape in a plane, and may have a shape in which a portion thereof is bent downward to face each other. The cover glass 100 according to an embodiment may include a first flat portion SP1, a second flat portion SP2, and a bent portion BP as an area connecting them and bent. The cover glass 100 may include a bent portion BP while the first and second flat portions SP1 and SP2 are spaced apart from and opposed to each other, and the cover glass 100 may have a shape of a space surrounded and spaced apart by the first and second flat portions SP1 and SP2 as a whole.

The cover glass 100 may have sides extending in the first direction (X-axis direction) and the second direction (Y-axis direction), and the sides extending in the first direction (X-axis direction) may be bent in the downward direction. The edges extending in one direction of the cover glass 100 may form the flat portions SP1 and SP2, and the edge bent in the downward direction of the edges may form the bent portion BP of the cover glass 100. For example, the cover glass 100 may include a first long side LS1 and a second long side LS2 extending in a first direction (X-axis direction), and a first short side SS1 and a second short side SS2 extending in a second direction (Y-axis direction). The first long side LS1 and the second long side LS2 of the cover glass 100 may be bent downward along the bending line BL, and one of the sides extending in the second direction (Y-axis direction), for example, the second short side SS2 may be located below one surface of the cover glass 100.

Specifically, the first flat portion SP1 and the second flat portion SP2 may form a flat face of the cover glass 100. The first flat part SP1 may include a first short side SS1 extending in the second direction (Y-axis direction), and the second flat part SP2 may include a second short side SS2 extending in the second direction (Y-axis direction). The first long side LS1 and the second long side LS2 extending in the first direction (X-axis direction) may be bent downward with respect to the bend line BL as described above, and may be present across the first flat portion SP1 and the second flat portion SP 2.

That is, the first and second flat portions SP1 and SP2 may have a rectangular shape on a plane and be spaced apart from and opposed to each other, respectively. The first flat portion SP1 may include a first surface facing upward and a second surface facing downward, and the second flat portion SP2 may include a first surface facing downward and a second surface facing upward. The other face of the first flat part SP1 and the other face of the second flat part SP2 may be opposite to each other. In the drawing, the portion corresponding to the second flat portion SP2 of each of the long sides LS1, LS2 is formed to be shorter in length than the portion corresponding to the first flat portion SP1, and thus it is shown that the second flat portion SP2 faces only a partial region of the first flat portion SP 1. That is, the cover glass 100 may have an asymmetrical shape of the first and second flat portions SP1 and SP 2. However, without being limited thereto, the respective long sides LS1 and LS2 may be formed to have the same length in the first flat portion SP1 and the second flat portion SP2, respectively, and the second flat portion SP2 may be opposed to the front surface of the first flat portion SP 1.

In the drawings, the first flat portion SP1 and the second flat portion SP2 are shown to have a rectangular shape where the long sides LS1 and LS2 intersect the short sides SS1 and SS2, but the present invention is not limited thereto. In several embodiments, corners where each of the long sides LS1, LS2 and each of the short sides SS1, SS2 of the cover glass 100 meet may be formed to be rounded so as to have a predetermined curvature. However, the planar form of the cover glass 100 is not limited to a rectangle, and may be formed in other polygonal, circular, or elliptical forms.

The bent portion BP may be a region where the flat surface of the cover glass 100 is bent in the third direction (Z-axis direction) with reference to the bend line BL. That is, the bent portion BP may connect the first flat portion SP1 and the second flat portion SP2, forming a surface curved differently from them. The cover glass 100 may have a shape of a space in which the flat portions SP1, SP2 and the bent portion BP surround and oppose each other with the flat portions SP1, SP2 being separated.

In addition, the cover glass 100 may include a light transmission region DA and a light blocking region NDA formed at an outer contour of the light transmission region DA. The light-transmitting area DA may be an area through which light incident from the outside or the inside of the cover glass 100 is transmitted to be displayed on the outside, and the light-shielding area NDA may be an area through which the light is absorbed or blocked. Such a light-shielding region NDA may be formed corresponding to a region where the printed layer ("20" in fig. 4) of the cover glass 100 is disposed, as will be described later.

The light transmitting region DA may be located substantially at the center of the cover glass 100, and the light blocking region NDA may be located at the edge of the cover glass 100 to surround the light transmitting region DA. The light transmission region DA may include a first light transmission region DA1 located at the first flat portion SP1, a second light transmission region DA2 located at the second flat portion SP2, and a third light transmission region DA3 located at the bent portion BP. The light transmission region DA is a region except for the light shielding region NDA located at the edge of the cover glass 100, so that the first light transmission region DA1 and the second light transmission region DA2 located at the flat portions SP1 and SP2 form a flat surface, and the third light transmission region DA3 located at the bent portion BP may be bent to form a curved surface. In the cover glass 100 according to an embodiment, the light transmission regions DA are formed at the flat portions SP1, SP2 and the bent portions BP, respectively, and light can be transmitted through the flat surface and the curved surface.

The light-shielding regions NDA may include a first light-shielding region NDA1 disposed adjacent to the first short side SS1, a second light-shielding region NDA2 disposed adjacent to the second short side SS2, a third light-shielding region NDA3 disposed along the first long side LS1, and a fourth light-shielding region NDA4 disposed along the second long side LS 2. Each light-shielding region NDA may be disposed adjacent to the long sides LS1 and LS2 and the short sides SS1 and SS2 of the cover glass 100, and the light-transmitting region DA may be located at the center of the flat portions SP1 and SP2 and the bent portion BP, apart from the long sides LS1 and LS2 and the short sides SS1 and SS 2. The light-shielding regions NDA formed along the respective long sides LS1, LS2 and the short sides SS1, SS2 may have lengths different from each other corresponding to the lengths of the respective sides. In addition, the third and fourth light-shielding regions NDA3 and NDA4 disposed adjacent to the first and second long sides LS1 and LS2 may include a portion partially bent at the bent portion BP.

The first flat portion SP1, the second flat portion SP2, and the bent portion BP of the cover glass 100 respectively include a light transmitting area DA and a light shielding area NDA, and light traveling from the inside of the cover glass 100 can be respectively displayed at the first flat portion SP1, the second flat portion SP2, and the bent portion BP. As will be described later, the cover glass 100 includes a base member ("10" in fig. 4) made of a transparent material and a printed layer ("20" in fig. 4) disposed on one surface of the base member 10, and light-shielding regions NDA are formed in regions where the printed layer 20 is disposed, and light-transmitting regions DA are formed in other regions.

Hereinafter, the structure of the cover glass 100 will be described in detail with reference to the other drawings.

Fig. 4 and 5 are sectional views of the cover glass of fig. 1.

Fig. 4 is a front view of the cover glass 100 viewed from one side, i.e., a second direction (Y-axis direction), fig. 5 is a sectional view of the center portion of the cover glass 100 of fig. 1 taken along the first direction (X-axis direction), and fig. 5 shows a section crossing the first light-shielding region NDA1, the first light-transmitting region DA1, the third light-transmitting region DA3, the second light-transmitting region DA2, and the second light-shielding region NDA 2.

Referring to fig. 4 and 5 in conjunction with fig. 1 to 3, the cover glass 100 may include a base member 10 and a printed layer 20 disposed on at least a partial region of the base member 10.

The base member 10 may be a substrate constituting a basic skeleton of the cover glass 100. The base member 10 may be made of a transparent material, and the base member 10 may be made of glass or plastic, for example. When the base member 10 of the cover glass 100 includes a plastic material, the cover glass 100 may have a Flexible property.

Examples of the plastic that can be applied to the base member 10 include, but are not limited to, polyimide (polyimide), polyacrylate (polyacrylate), polymethyl methacrylate (PMMA), Polycarbonate (PC), polyethylene naphthalate (PEN), polyvinylidene chloride (polyvinylidene chloride), polyvinylidene fluoride (PVDF), polystyrene (polystyrene), ethylene vinyl alcohol copolymer (ethylene vinyl acetate), polyether sulfone (PES), polyether imide (PEI), polyphenylene sulfide (PPS), polyarylate (polyacrylate), triacetyl cellulose (triacetyl cellulose), cellulose acetate (TAC), and cellulose acetate (TAC).

When the base member 10 comprises plastic, it may further comprise a coating (not shown) disposed on the upper and lower surfaces of the plastic. In an embodiment, the coating layer may be a hard coating layer including an organic layer and/or an organic-inorganic composite layer including an acrylate compound and the like. The organic layer may include an acrylate compound. The organic-inorganic composite layer may be a layer in which an inorganic substance such as silicon oxide, zirconium oxide, aluminum oxide, tantalum oxide, niobium oxide, or glass beads is dispersed in an organic substance such as an acrylate compound. In another embodiment, the coating may comprise a metal oxide layer. The metal oxide layer may include metal oxides of titanium, aluminum, molybdenum, tantalum, copper, indium, tin, tungsten, and the like, but is not limited thereto.

The base member 10 may have substantially the same shape as the cover glass 100, and the members disposed on the base member 10 may constitute one cover glass 100 together with the base member 10. For example, the base member 10 may be configured to have a rectangular shape in plan view, and include two flat portions SP1 and SP2 facing each other and a bent portion BP connecting them and having a bent shape. The base member 10 may have a form in which the flat portions SP1, SP2 and the bent portion BP surround a space partitioned by the flat portions SP1, SP 2. The shape of the base member 10 is substantially the same as the shape of the cover glass 100 described above with reference to fig. 1 to 3, and detailed description thereof is omitted.

The printed layer 20 may be disposed on one surface in the third direction (Z-axis direction) of the base member 10, that is, on one surface facing the space surrounded by the base member 10. The printed layer 20 includes a substance that absorbs or blocks light traveling toward the base member 10 from passing therethrough, so that light incident toward the printed layer 20 can be blocked. The printed layer 20 is shown in the drawings as being composed of one layer, but is not limited thereto. In several embodiments, the printing layer 20 may also have a structure in which a plurality of layers having different widths from each other are stacked. In this case, the printed layers 20 having different widths from each other may have a range of 15 μm to 20 μm in difference of widths thereof. In addition, the printed layer 20 may have a thickness ranging from 3 μm to 7 μm, but is not limited thereto.

In one embodiment, the printed layer 20 may be disposed along the outer contour of the base member 10, and the light-shielding region NDA of the cover glass 100 may be formed in the region of the base member 10 where the printed layer 20 is disposed. The printed layer 20 shown in fig. 4 may form the fourth light-shielding region NDA4 disposed adjacent to the second long side LS2 of the cover glass 100, and the printed layer 20 shown in fig. 5 may form the first light-shielding region NDA1 and the second light-shielding region NDA2 disposed adjacent to the respective short sides SS1 and SS2 of the cover glass 100. The flat portions SP1, SP2 and the bent portions BP may form light-transmitting regions DA in regions where the printed layer 20 is not disposed.

That is, the cover glass 100 defines the light shielding region NDA on the base member 10 along the arrangement of the printing layer 20, and light directed toward the base member 10 can be displayed through the light transmitting region DA. The description of the arrangement of the printed layer 20 is the same as the description of the light shielding region NDA of the cover glass 100 described above with reference to fig. 1 to 3, and a detailed description thereof is omitted.

On the other hand, such a printed layer 20 may be formed by a process method of transferring or printing Ink (Ink of fig. 14) constituting the printed layer 20 on one side of the base member 10. As an example, the cover glass 100 may be manufactured by a method of forming the Printing layer 20 by a Pad-Printing process of transferring ink containing a substance absorbing or blocking light transmission onto a print head (Pad) and Printing it on one surface of the base member 10. The Pad printing process is a process of printing ink in such a manner that the ink is transferred to a target object to be printed with the ink by contact between the target object and a print head (Pad). In the region where the print head is in contact with the object, the ink transferred at the print head can be printed to the object in accordance with the surface energy between the print head-ink and the object-ink.

Here, in order to print the ink transferred to the print head onto one surface of the base member 10, contact between the print head and the base member 10 is required. However, as shown in fig. 1 to 5, when the base member 10 or the cover glass 100 includes flat portions SP1, SP2 opposed to each other with a space therebetween and a bent portion BP connecting them and bent to have a shape surrounding a specific space, a head having a form capable of being inserted into the space may be required. The printed layer 20 of the cover glass 100 is formed on one surface of the base member 10 opposite to the space surrounded by the base member 10, and a head for printing ink is inserted into the space and can be in contact with the one surface of the base member 10. That is, as described above, in order to form the printing layer 20 on the one surface of the base member 10 having the flat portions SP1 and SP2 and the bent portion BP, a pad having a shape corresponding thereto is required. According to an embodiment, the printing layer forming apparatus for forming the printing layer 20 of the cover glass 100 may include a pad printer having a spacer having a certain thickness and a convex shape to enable the printing layer 20 to be formed on the flat portions SP1, SP2 of the base member 10 spaced apart from each other to be opposite. Hereinafter, a print layer forming apparatus according to an embodiment will be described.

Fig. 6 is a schematic view of a print layer forming apparatus according to an embodiment. Fig. 7 is a sectional view of a pad printer included in a printing layer forming apparatus according to an embodiment. Fig. 8 is a sectional view of a remover included in a printing layer forming apparatus according to an embodiment.

Referring to fig. 6 to 8, the printing layer forming apparatus 1000 may include a pad printer 300 and a remover 500. The printing layer forming apparatus 1000 according to an embodiment may include a pad printer 300 having a specific shape and a cleaner 500 that removes a portion of ink transferred to the pad printer 300. The pad printer 300 may have a form corresponding to the shape of the target object on which the ink is printed, and the eraser 500 may selectively remove the ink corresponding to the area not printed on the target object among the inks transferred to the pad printer 300. According to an embodiment, the printed layer 20 of the cover glass 100 having the shape shown in fig. 1 can be formed using the printed layer forming apparatus 1000.

The pad printer 300 may include a first body portion 310 and a spacer portion 350 connected to the first body portion 310 and to which ink is transferred.

The first body portion 310 may be a portion of the pad printer 300 in which the spacer 350 is formed and which can be coupled with other moving parts. Although not shown in the drawings, the pad printer 300 may be configured such that the first body portion 310 is attached to a predetermined moving member and moves in one direction with the movement of the moving member. The pad printer 300 may repeat a reciprocating motion in one direction and transfer or print ink to a target object by the movement of a moving member combined with the first body portion 310.

The shape of the first body portion 310 is not greatly limited. The first body portion 310 is illustrated as having a rectangular shape in plan, but is not limited thereto, and may have various shapes. The first body part 310 may have various sizes and shapes according to the size or shape of the target object to which ink is printed. As described later, the length ("LT" in fig. 6) of the first body part 310 measured in one direction may be greater than the length ("LC" in fig. 6) of the eraser 500 measured in the one direction.

The blocking part 350 is formed on one surface of the first body part 310. The stopper 350 may be a portion of the pad printer 300 where ink is transferred and contacts the target object. The ink transferred on the spacer 350 may be printed to the target object by the contact of the spacer 350 with the target object. Here, the stopper 350 may have a shape that can make contact smooth according to the shape of the object to be contacted. For example, when the pad printer 300 is in contact with the base member 10 of the cover glass 100 described above with reference to fig. 1, the stopper 350 of the pad printer 300 may have a specific shape corresponding to the shape of the base member 10 so as to be able to contact with the region of the base member 10 where the printed layer 20 is disposed.

According to an embodiment, the blocking part 350 may have a narrower thickness than the first body part 310 on one surface of the first body part 310 and a convex shape. As shown in fig. 1, when the base member 10 of the cover glass 100 has a shape surrounding a predetermined space, the stopper 350 of the pad printer 300 may have a shape that can be inserted into the space surrounded by the base member 10. As will be described later, in the manufacturing process of the cover glass 100 using the printing layer forming apparatus 1000, the stopper 350 may be inserted into the space surrounded by the base member 10 and brought into contact with one surface of the base member 10 to print the printing layer 20.

Specifically, the blocking portion 350 may have a thickness WT narrower than the first body portion 310 and extend to the first length HT. In addition, the stopper portion 350 may have the same width as the length LT of the first body portion 310 measured in one direction. The width, thickness WT, and length HT of the spacer 350 may be different according to the shape of the target object to which ink is printed. The stopper 350 having a shape protruding from the first body 310 may be inserted into a groove HP of a cleaner 500, which will be described later, and may be inserted into a specific space or region of a target object to be brought into contact with the target object in a state where ink is transferred.

The pad printer 300 may be transferred with ink only outside the spacer 350 when ink is transferred. The spacer 350 may include first and second faces STA1 and STA2 and a protruding end, the first and second faces STA1 and STA2 forming a flat face, the protruding end may have a rounded shape. The stopper 350 of the pad printer 300 may have a specific shape corresponding to the base member 10 of the cover glass 100 of fig. 1. According to an embodiment, the stopper 350 may include a first face STA1 and a second face STA2 corresponding to the flat portions SP1, SP2 of the base member 10 and include ends having a circular shape corresponding to the bent portion BP of the base member 10. In the manufacturing process of the cover glass 100, the pad printer 300 is transferred with ink on the first side STA1, the second side STA2, and the rounded end portion of the spacer 350, and when the spacer 350 is brought into contact with the base member 10, a part of the ink is printed on the base member 10, and the printed layer 20 can be formed.

Here, the pad printer 300 may be composed of a material having elasticity or a soft material so that the shape may be changed by an external force when contacting with the object. For example, the pad printer 300 may be constructed of materials such as silicone, gelatin, latex, synthetic rubber, elastomeric polyurethane, and the like. However, it is not limited thereto.

On the other hand, the printed layer 20 disposed on the base member 10 may be disposed only at the edge of one surface of the base member 10. For this reason, when the spacer 350 of the pad printer 300 is in contact with the base member 10, only a portion corresponding to the region where the printed layer 20 is disposed may be left in the ink transferred to the spacer 350, and the other ink may be removed. The printing layer forming apparatus 1000 according to an embodiment may include a cleaner 500 capable of selectively removing a portion of the ink transferred to the dam 350.

The eraser 500 may have a shape in which a groove portion HP into which the spacer portion 350 of the pad printer 300 is inserted is formed. The eraser 500 may include a second body portion 550 and first and second sidewalls 510 and 520 connected to the second body portion 550 and spaced apart from each other, and the first and second sidewalls 510 and 520 may form a groove portion HP into which the blocking portion 350 is inserted. The eraser 500 may be formed of one integrated part, and the second body portion 550 and the first and second sidewalls 510 and 520 may be referred to as a portion in the one integrated part.

The eraser 500 according to an embodiment may be formed with a groove portion HP capable of inserting the stopper 350 of the pad printer 300, the groove portion HP including inner walls HA1, HA2 of a shape corresponding to the outer face of the stopper 350. That is, the groove portion HP may include the first and second inner walls HA1 and HA2 having flat surfaces like the first and second faces STA1 and STA2 of the spacer 350 and have a rounded portion corresponding to the end of the spacer 350. However, the groove portion HP may have a width WC greater than the thickness WT of the spacer 350 to enable insertion of the spacer 350 having a certain thickness WT.

When the spacer 350 is inserted into the groove HP of the cleaner 500 with ink transferred thereto and pressure is applied to the spacer 350, the thickness WT of the spacer changes and the spacer can contact the groove HP of the cleaner 500. If the spacer 350 and the wiper 500 are in contact, a portion of the ink transferred to the spacer 350 may be removed by the wiper 500. Thus, the pad printer 300 can leave only the ink printed on the target object on the outer surface of the spacer 350.

As described above, in order to form the printing layer 20 of the cover glass 100 shown in fig. 1, the printing layer forming apparatus 1000 according to an embodiment may have a specific shape like the spacer 350 of the pad printer 300. Similarly, the wiper 500 may have a specific shape such that only ink corresponding to the printed layer 20 of the cover glass 100 remains on the spacer 350. The cover glass 100 of fig. 1 is such that the first flat portion SP1 and the second flat portion SP2 may have different areas from each other, and the spacer portion 350 in contact with the base member 10 may be transferred with ink at a specific position corresponding to the printed layer 20 disposed at the first flat portion SP1 and the second flat portion SP 2.

For this reason, the cleaner 500 according to an embodiment is that the first and second side walls 510, 520 may have lengths HC1, HC2 different from each other, and the case of the first and second inner walls HA1, HA2 of the groove portion HP may also have depths HCP1, HCP2 different from each other. Even if ink is transferred to the entire outer surface of the dam portion 350, the wiper 500 can remove only a part of the ink corresponding to the shape of the object to which the ink is printed. That is, the first and second sidewalls 510 and 520 of the scrubber 500 may have different lengths HC1 and HC2 from each other corresponding to the shapes of the flat portions SP1 and SP2 of the cover glass 100, and the groove portion HP formed in the scrubber 500 may also have different lengths HCP1 and HCP2 from each other for the first and second inner walls HA1 and HA 2.

The cleaner 500 is formed with a groove HP having a shape corresponding to the light transmission area DA of the cover glass 100, and if the spacer 350 of the pad printer 300 is inserted into the groove HP of the cleaner 500, ink at a portion corresponding to the light transmission area DA of the cover glass 100 can be selectively removed. The spacer 350 may be transferred with ink only at a position corresponding to the light shielding area NDA of the cover glass 100.

Fig. 9 is a schematic diagram showing a state in which a pad printer is inserted into a cleaner according to an embodiment. Fig. 10 is a sectional view showing a state where the pad printer of fig. 9 is inserted into a remover. Fig. 11 is a side view illustrating a state in which the pad printer of fig. 9 is inserted into a cleaner. Fig. 12 is a sectional view showing a state in which a pad printer is pressurized after being inserted into a remover according to an embodiment.

In the operation of the printing layer forming apparatus 1000, the pad printer 300 is configured such that the stopper 350 having a shape protruding in one direction can be inserted into the groove HP of the cleaner 500, as described with reference to fig. 9 to 12. The thickness WT of the spacer 350 may be smaller than the width WC of the groove portion HP to enable the spacer 350 to be smoothly inserted. The stopper 350 is inserted in a state of being spaced apart from the groove HP of the wiper 500, and the stopper 350 can change its shape and come into contact with the groove HP of the wiper 500 when pressurized.

Here, the groove portion HP of the cleaner 500 is such that the first inner wall HA1 and the second inner wall HA2 have a shape corresponding to the light-transmitting region DA of the cover glass 100, and the ink can be removed from the spacer portion 350 in the region corresponding to the light-transmitting region DA of the cover glass 100.

For example, the stop 350 may be the first face STA1 contacting the first flat SP1 of the base assembly 10 and the second face STA2 contacting the second flat SP2 of the base assembly 10. In this case, the wiper 500 may be such that the first inner wall HA1 of the groove portion HP HAs the same area as the first light transmission region DA1 to enable ink removal at a portion in contact with the first light transmission region DA1 in the first face STA1 of the spacer 350. Similarly, the groove portion HP of the eraser 500 may be such that the second inner HA2 HAs the same area as the second light transmission region DA 2. If the wiper 500 is contacted after the ink is transferred to the entire outer surface of the spacer portion 350, the ink is removed in a portion corresponding to the light transmission area DA of the cover glass 100 in the outer surface of the spacer portion 350, and the ink may be left only in a portion corresponding to the light shielding area NDA.

In addition, the first and second faces STA1 and STA2 of the spacer 350 may have a larger area than the first and second inner walls HA1 and HA2 of the groove portion HP, so that the ink can be left in the spacer 350 corresponding to the region of the cover glass 100 where the printed layer 20 is disposed. As shown in fig. 10 and 11, a length LT of the spacer 350 measured in one direction may be longer than a length LC of the cleaner 500 measured in the one direction, and a first length HT of the spacer 350 may be longer than depths HCP1 and HCP2 of the inner walls HA1 and HA2 of the groove portion HP. Even if the spacer 350 is inserted into the groove portion HP of the wiper 500, a part of the outer surface of the spacer 350 may be exposed so as not to face the inner walls HA1, HA2 of the groove portion HP.

As described above, the pad printer 300 may be formed of a material that can be deformed by applying pressure. When the stopper 350 according to an embodiment is pressed in a state of being inserted into the groove portion HP of the wiper 500, the stopper 350 may contact the inner walls HA1 and HA2 of the groove portion HP of the wiper 500 while changing its thickness (WT' of fig. 12).

As shown in fig. 12, when the spacer 350 is pressurized, the outer surface of the spacer 350 may contact the groove HP of the wiper 500. The first face STA1 of the spacer 350 contacts the first inner wall HA1 of the groove portion HP to form a first contact face CA1, the second face STA2 contacts the second inner wall HA2 of the groove portion HP to form a second contact face CA2, and the circular end of the spacer 350 contacts the circular portion of the groove portion HP having a shape corresponding thereto to form a third contact face CA 3. The ink transferred on the first contact surface CA1, the second contact surface CA2, and the third contact surface CA3 among the ink transferred on the dam 350 can be removed by the cleaner 500. As described above, the groove portion HP of the wiper 500 may have a shape corresponding to the light transmission region DA of the cover glass 100, and the portion of the outer face of the spacer portion 350 from which ink is removed is in contact with the light transmission region DA of the base member 10.

On the other hand, the first and second faces STA1, STA2 of the spreader portion 350 may have wider areas than the inner walls HA1, HA2 of the groove portion HP, and form non-contact faces NCA1, NCA2 at portions not opposed to and exposed to them. That is, the first non-contact surface NCA1 out of contact with the groove portion HP in the first surface STA1 and the second non-contact surface NCA2 out of contact with the groove portion HP in the second surface STA2 of the spacer 350 may leave ink. The ink remaining on the first non-contact surface NCA1 and the second non-contact surface NCA2 of the spacer 350 may remain at a position corresponding to the light-shielding region NDA of the cover glass 100, and may contact the base member 10 to form the printed layer 20. Although not shown in the drawings, a part of ink may remain at the rounded end of the spacer 350, and the ink may form the printing layer 20 corresponding to the light-shielding region NDA located at the bending portion BP of the cover glass 100.

As described above, the printing layer forming apparatus 1000 may include the pad printer 300 and the cleaner 500 having a shape corresponding to the shape of the object on which the printing layer is formed. The pad printer 300 may include a spacer 350 that contacts the target object, and the wiper 500 may be formed with a groove HP into which the spacer 350 is inserted. According to an embodiment, the cover glass 100 having a shape surrounding a predetermined space as shown in fig. 1 may be manufactured by forming the printed layer 20 on one surface of the base member 10 using the pad printer 300 of the printed layer forming apparatus 1000 of fig. 6.

A method for manufacturing a cover glass 100 having a print layer 20 formed on a base member 10 by a print layer forming apparatus 1000 according to an embodiment will be described below.

Fig. 13 is a flowchart illustrating a method of manufacturing a cover glass according to an embodiment.

Referring to fig. 13, the method of manufacturing a cover glass 100 according to an embodiment may include a step of transferring ink onto the spacer 350 of the pad printer 300 (S1), a step of contacting the spacer 350 with the remover 500 to remove a portion of the ink transferred onto the spacer 350 (S2), and a step of contacting the spacer 350 with the base member 10 to print the ink remaining on the spacer 350 to the base member 10 (S3). In the step of removing a portion of the ink transferred to the spacer 350 (S2), the spacer 350 may be inserted into the groove portion HP of the eraser 500, and in the step of printing the ink to the base member 10 (S3), the spacer 350 may be inserted into a predetermined space surrounded by the base member 10. The pad printer 300 of the printing layer forming apparatus 1000 can form the printing layer 20 on one surface of the base member 10 by a process of inserting the cleaner 500 and the base member 10, respectively.

Fig. 14 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment.

First, referring to fig. 14, Ink is transferred to the pad printer 300 of the printing layer forming apparatus 1000 (S1), and a cleaner 500 in which the groove portions HP are formed is prepared. Here, according to an embodiment, the Ink may be transferred only to the kicker portion 350 of the pad printer 300. The Ink may be transferred to the first surface STA1 and the second surface STA2, which are flat surfaces including the spacer 350, or the round end BAT. In an exemplary embodiment, the process of transferring the Ink at the kicker 350 of the pad printer 300 may be performed by a Dipping (Dipping) process or a spraying (Spray) process, etc. However, it is not limited thereto. The Ink transferred on the outer face of the spreader portion 350 may be partially removed by the cleaner 500 in a subsequent process.

Fig. 15 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment. Fig. 16 is a sectional view showing a step in the manufacturing process of the cover glass of fig. 15.

Next, referring to fig. 15 and 16, the spacer 350 of the pad printer 300 to which the Ink is transferred is inserted into the groove HP of the cleaner 500. As described above, the cleaner 500 is formed with the groove portion HP into which the spacer portion 350 of the pad printer 300 can be inserted. The groove portion HP of the wiper 500 may have a width WC wider than the thickness WT of the spacer 350 to enable smooth insertion of the spacer 350. The stopper portion 350 to which the Ink is transferred may be inserted in a state of being spaced apart from the groove portion HP of the cleaner 500. As shown in fig. 16, the Ink transferred to the outer surface of the resist section 350 may be opposed to and spaced from the groove section HP inner walls HA1, HA2 of the cleaner 500.

Fig. 17 is a sectional view showing a step in the manufacturing process of the cover glass according to an embodiment.

Next, referring to fig. 17, the pad printer 300 inserted into the cleaner 500 is pressed so that a part of the outer surface of the stopper 350 is in contact with the inner walls HA1 and HA2 of the groove portion HP. The pad printer 300 may be formed of a material having elasticity so as to be deformable by an external pressure, and when pressurized in a state of being inserted into the groove portion HP of the wiper 500, the spacer portion 350 may be brought into contact with the inner walls HA1, HA2 of the groove portion HP while varying the thickness thereof (350' of fig. 17). The stopper 350' may contact the inner walls HA1, HA2 of the groove portion HP to form a first contact surface CA1, a second contact surface CA2, and a third contact surface CA 3. In addition, since the first and second sides STA1 and STA2 of the spacer 350 'have a wider area than the inner walls HA1 and HA2 of the groove portion HP of the wiper 500, at least a partial region of the spacer 350' may form non-contact surfaces NCA1 and NCA2 which do not contact the groove portion HP. As shown in the drawing, the dam 350' may be formed with a first non-contact surface NCA1 out of the first surface STA1 which is not in contact with the groove portion HP and a second non-contact surface NCA2 out of the second surface STA2 which is not in contact with the groove portion HP. The Ink transferred to the contact surfaces CA1, CA2, CA3 in the outer surface of the spacer 350' in contact with the groove portions HP may be removed by the cleaner 500, and the Ink transferred to the non-contact surfaces NCA1, NCA2 may be left in the outer surface of the spacer 350.

However, as described above, the wiper 500 may be formed with the groove portion HP in a form corresponding to the shape of the object on which the printing layer 20 is formed, and the first sidewall 510 and the second sidewall 520 of the wiper 500 may have different heights from each other. According to an embodiment, the non-contact surfaces NCA1, NCA2 of the outer face of the spacer portion 350' and the groove portion HP which do not contact may have areas different from each other. For example, the length HC1 of the first side wall 510 or the depth HCP1 of the first inner wall HA1 of the cleaner 500 may be greater than the length HC2 of the second side wall 520 or the depth HCP2 of the second inner wall HA 2. That is, the first inner wall HA1 of the groove portion HP may have an area larger than that of the second inner wall HA2, and the first non-contact surface NCA1 of the strut portion 350' may have an area smaller than that of the second non-contact surface NCA 2. However, it is not limited thereto. The shape of the printing layer forming apparatus 1000 may be different depending on the shape of the object on which the printing layer 20 is formed, such as the pad printer 300 or the eraser 500. In several embodiments, the scrubber 500 may be in the form of a first sidewall 510 and a second sidewall 520 having the same shape and a symmetrical structure. In this case, the non-contact surfaces NCA1, NCA2 of the spacer 350' may have the same area.

Fig. 18 is a sectional view showing a step in the manufacturing process of the cover glass according to an embodiment. Fig. 19 is a schematic view showing a part of the ink transferred to the pad printer is removed in the manufacturing process of the cover glass according to an embodiment.

Next, referring to fig. 18 and 19, the pad printer 300 is separated from the cleaner 500, and a part of the Ink transferred to the stopper 350 is removed (S3). When the attractive force with the wiper 500 is larger than the attractive force with the spacer 350, the Ink can be transferred to the inner walls HA1 and HA2 of the groove portion HP of the wiper 500 when the spacer 350 comes into contact with the groove portion HP of the wiper 500. Among the Ink transferred to the dam portion 350, a part of the Ink remaining on the non-contact surfaces NCA1, NCA2 of the dam portion 350 ("Ink 1" in fig. 18) may be transferred to the groove portion HP inner walls HA1, HA2 of the cleaner 500 (Ink 2 "in fig. 18) by the Ink transferred to the contact surfaces CA1, CA2, CA3 in contact with the groove portion HP. The Ink1 remaining on the spacer portion 350 may remain on the spacer portion 350 corresponding to the position of the object where the printed layer 20 is formed. For example, in the cover glass 100 of fig. 1, only the Ink1 transferred to the edge except the central portion is left on the spacer portion 350. Ink1 remaining on the spacer 350 may be left on the base member 10 in the region corresponding to the light-shielding region NDA and on the spacer 350, and Ink in the region corresponding to the light-transmitting region DA may be removed by the cleaner 500. However, the positions of the Ink1 and the removed Ink2 remaining on the spacer 350 may be variously deformed depending on the shape of the object, the position of the printing layer 20, and the like.

Fig. 20 is a schematic view showing a step in the manufacturing process of the cover glass according to an embodiment.

Next, referring to fig. 20, the pad printer 300 having the Ink1 left partially on the spacer 350 is brought into contact with the object to form the printed layer 20. For example, when the target object is the base member 10 constituting the cover glass 100 of fig. 1, as shown in fig. 20, the stopper portion 350 of the pad printer 300 may be inserted into a region surrounded by the flat portions SP1, SP2 and the bent portion BP of the base member 10. The Ink1 remaining on the outer face of the spacer 350 may be in contact with one face of the base member 10, and the Ink1 may be transferred onto one face of the base member 10 and form the printed layer 20. Here, the second non-contact surface NCA2 of the spreader portion 350 may be such that only a partial area is in contact with the second flat portion SP2 of the base member 10. Of the Ink1 remaining on the second non-contact surface NCA2, only the Ink1 in contact with the edge of the second flat portion SP2 may be transferred, and the other Ink1 may remain on the stay portion 350. Although not shown in the drawings, a part of the Ink1 may remain at the rounded end BAT of the spacer 350 corresponding to the bent portion BP of the base member 10, and these may be transferred to the edge of the bent portion BP of the base member 10 to form the printed layer 20.

The printed layer 20 may be disposed on a surface opposite to the space surrounded by the first flat portion SP1, the second flat portion SP2, and the bent portion BP of the base member 10, and formed on an edge of the surface. As described above, the printed layer 20 may form the light-shielding region NDA of the cover glass 100, and the region where the printed layer 20 is not disposed may be the light-transmitting region DA of the cover glass 100.

Through the above processes, the print layer forming apparatus 1000 according to one embodiment can manufacture the cover glass 100 in which the print layer 20 is disposed on the base member 10. The printing layer forming apparatus 1000 may include a pad printer 300 and a cleaner 500 having a shape corresponding to the shape of the object to form the printing layer 20, for example, the base member 10. The Ink transferred to the pad printer 300 can be partially removed by the cleaner 500, and the Ink remaining in the pad printer 300 can form the printed layer 20 by contacting the object.

On the other hand, the pad printer 300 and the cleaner 500 of the printing layer forming apparatus 1000 may have a shape corresponding to the shape of the object. Unlike fig. 1, when the cover glass 100 has the first and second flat portions SP1 and SP2 and the first and second flat portions SP1 and SP2 have a symmetrical structure with each other, the eraser 500 of the printing layer forming apparatus 1000 may also have a symmetrical structure of the first and second sidewalls 510 and 520.

Fig. 21 is a schematic view of a cover glass according to another embodiment. Fig. 22 is a plan view of the cover glass of fig. 21. Fig. 23 is a sectional view of the cover glass of fig. 21.

Referring to fig. 21 to 23, the cover glass 100_1 according to an embodiment may have the same area of the second flat portion SP2 and the first flat portion SP 1. That is, the cover glass 100_1 may have a structure in which the first flat portion SP1 and the second flat portion SP2 are symmetrical. The present embodiment is different from the embodiment of fig. 1 in the shape of the second flat portion SP 2. Hereinafter, redundant description will be omitted, and description will be given centering on differences.

The cover glass 100_1 of fig. 21 to 23 may be the same length of a portion corresponding to the first flat portion SP1 and a portion corresponding to the second flat portion SP2 in each of the long sides LS1_1, LS2_ 2. Thus, the second flat portion SP2 may be spaced apart from and opposed to the first flat portion SP1 as a whole, and the first short side SS1_1 and the second short side SS2_2 may be opposed to each other. Thus, the cover glass 100_1 may be a cover glass having a wider area of the second light transmission region DA2_1 among the light transmission regions DA. In addition, the first light-transmitting region DA1_1 and the third light-transmitting region DA3_1, and further the first light-shielding region NDA1_1, the second light-shielding region NDA2_1, the third light-shielding region NDA3_1 and the fourth light-shielding region NDA4_1 may have substantially the same area.

The cover glass 100_1 in fig. 21 may have a symmetrical structure with respect to the base member 10_1 with respect to the bend line BL, and the printed layer 20_1 may be disposed on a surface facing the space surrounded by the base member 10_ 1. As the first and second flat portions SP1_1 and SP2_1 of the base member 10_1 have the same area and the area of the second light transmission region DA2_1 becomes larger, the position of the Ink remaining in the pad printer 300 of the printed layer forming apparatus 1000 changes. For example, in the printed layer forming apparatus 1000, the groove portion HP of the cleaner 500 may have the same area as the first inner wall HA1 and the second inner wall HA2 corresponding to the light transmitting region DA _1 of the cover glass 100_ 1.

Fig. 24 is a schematic view of a print layer forming apparatus according to another embodiment.

Referring to fig. 24, the printing layer forming apparatus 1000 according to an embodiment may be such that the first sidewall 510_1 and the second sidewall 520_2 of the eraser 500_1 have the same length HC1, HC 2. Thus, the groove portion HP of the wiper 500_1 may be such that the first inner wall HA1 and the second inner wall HA2 have the same area. The present embodiment is different from the embodiment of fig. 6 in that the second sidewall 520_1 of the scrubber 500_1 has a higher height. Hereinafter, redundant description will be omitted, and description will be given centering on differences.

In the printed layer forming apparatus 1000 of fig. 24, the cleaner 500_1 may have a form in which the first sidewall 510_1 and the second sidewall 520_1 have the same height and are symmetrical with respect to the groove portion HP. In the cleaner 500_1, as the first and second sidewalls 510_1 and 520_1 have the same shape and the second sidewall 520_1 is formed higher, the first and second inner walls HA1 and HA2 of the groove portion HP may have the same depth HCP1 and HCP2, respectively.

The shape of such a scrubber 500_1 may be a shape corresponding to the light transmission area DA of the cover glass 100_1 of fig. 21. When the spacer 350 is inserted into the groove portion HP of the eraser 500_1, the contact surfaces CA1, CA2, CA3 formed by the spacer 350 contacting the groove portion HP of the eraser 500_1 may be regions corresponding to the light transmission region DA of the cover glass 100_ 1.

Fig. 25 is a schematic diagram showing a state in which a pad printer is inserted into a cleaner according to another embodiment. Fig. 26 is a schematic view showing a part of the ink transferred to the pad printer is removed in the manufacturing process of the cover glass according to another embodiment.

First, referring to fig. 25 and 26, when the spacer 350 'of the pad printer 300 is pressed in a state of being inserted into the groove portion HP of the cleaner 500_1, the outer surface of the spacer 350' comes into contact with the groove portion HP, and the contact surfaces CA1, CA2, and CA3 can be formed. Unlike fig. 17, the cleaner 500_1 can vary the area of the second contact surface CA2 of the stopper portion 350' contacting the second inner wall HA2 of the groove portion HP more greatly due to the higher depth HCP2 of the second side wall 520_ 1.

In contrast, in the non-contact surfaces NCA1, NCA2 exposed without the spreader portion 350' contacting the groove portion HP, the second non-contact surface NCA2 may have a narrower area. Thus, only the Ink remaining at the edge of the spacer 350 may form the printed layer 20 on one surface of the base member 10_1 corresponding to the light shielding region NDA of the cover glass 100_1 of fig. 21. The same as above except that the position of the Ink remaining in the stopper portion 350 is different due to the shape of the wiper 500_ 1. Otherwise, redundant description is omitted.

In the above, the embodiments of the present disclosure have been described with reference to the accompanying drawings, but it will be understood by those having ordinary knowledge in the technical field to which the present disclosure pertains that the embodiments may be embodied in other specific forms without changing the technical idea or essential features thereof of the present disclosure. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.