KR102605143B1 - Display Panel And Display Device Including The Same - Google Patents

Abstract

The present invention includes first and second substrates facing each other, spaced apart from each other, and including an active area and a pad area; at least one signal wire disposed in the active area on the top of the first substrate; a light emitting element and a pixel circuit connected to the at least one signal wire; at least one pad disposed in the pad area on the top of the first substrate; A display panel is provided including at least one contact wire connected to the at least one pad and a portion of which is exposed and protrudes from one side of the first and second substrates.

Description

Display panel and display device including the same {Display Panel And Display Device Including The Same}

The present invention relates to a display panel, and more particularly to a display panel including contact wires protruding and exposed to the side, and a display device including the same.

Recently, when two or more display panels are connected to form one large display device, such as a tiled display device, each display panel is composed of a complete system including the entire driving unit, and multiple display panels are They are connected to each other to form a large display device with the required size and resolution.

Accordingly, a large display device can be configured by simply connecting a plurality of display panels in the form of tiles, and the large display device can be driven by applying the necessary electrical signals to each display panel.

However, as each display panel is configured as a complete system, the manufacturing cost of the large display device increases, and the thickness and weight of the large display device also increase.

The present invention was developed to solve the above problems. By physically and electrically connecting display panels through contact wires exposed to the sides, the connection process is simplified, manufacturing costs are reduced, and the thickness and weight of the display panel are reduced. The purpose is to provide a display device including the same.

The purpose of the present invention is to provide a display panel and a display device including the same, which reduce manufacturing costs and minimize image distortion by imparting elasticity to contact wiring exposed to the side.

In order to achieve the above object, the present invention includes first and second substrates facing each other, spaced apart from each other, and including an active area and a pad area; at least one signal wire disposed in the active area on the top of the first substrate; a light emitting element and a pixel circuit connected to the at least one signal wire; at least one pad disposed in the pad area on the top of the first substrate; A display panel is provided including at least one contact wire connected to the at least one pad and a portion of which is exposed and protrudes from one side of the first and second substrates.

In addition, the display panel further includes a support disposed on the at least one contact wire, one side of which protrudes from one side of the first and second substrates, and the at least one contact wire is disposed on the support. On the lower surface, the cross-section is in contact with a portion of the side and upper surfaces and has an asymmetric “ㄷ” shape, and a portion of the at least one contact wire that is exposed may have a flat surface.

Additionally, the active area includes a plurality of pixels, and the light-emitting element and the pixel circuit are disposed in each of the plurality of pixels, so that one pixel circuit can drive one light-emitting element.

In addition, the active area includes a plurality of pixels, the light emitting element is disposed in each of the plurality of pixels, and the pixel circuit is disposed between at least two of the plurality of pixels, so that one pixel circuit is disposed between the plurality of pixels. At least two of the pixels can be driven.

Additionally, the display panel includes a support plate disposed on the at least one contact wire; It further includes a spacer disposed on an upper portion of the support plate, wherein the at least one contact wire is in contact with the lower surface of the support plate and has an asymmetric “L” shape in cross section, and a portion of the at least one contact wire that is exposed has a curved surface. You can have it.

Additionally, the display panel includes a supporter disposed on an upper portion of the at least one contact wire; It further includes a spacer disposed on an upper portion of the support, wherein the at least one contact wire is in contact with the lower and upper surfaces of the support and has a symmetrical “L” shape in cross section, and a portion of the at least one contact wire that is exposed is It can have a curved surface.

Additionally, the display panel includes a support ball disposed between the first substrate and the light emitting device; a first contact ball disposed between the at least one signal wire and the light emitting element and between the at least one signal wire and the pixel circuit; a second contact ball disposed between the at least one pad and the at least one contact wire; It may further include a filler that fills the space between the light emitting device and the pixel circuit and the second substrate.

Meanwhile, the present invention relates to a display device including a plurality of display panels, each of the plurality of display panels comprising: first and second substrates facing each other and spaced apart from each other and including an active area and a pad area; at least one signal wire disposed in the active area on the top of the first substrate; a light emitting element and a pixel circuit connected to the at least one signal wire; at least one pad disposed in the pad area on the top of the first substrate; At least one contact wire connected to the at least one pad, a portion of which is exposed by protruding from one side of the first and second substrates, and wherein the at least one contact wire is connected to two adjacent of the plurality of display panels. Provides display devices that are electrically connected by contacting each other.

Additionally, the active area includes a plurality of pixels, two horizontally adjacent light emitting elements of the plurality of pixels are spaced apart by a first pitch, and two vertically adjacent light emitting elements of the plurality of pixels are spaced apart from each other by a first pitch. They are spaced apart by a second pitch, and the pitch of the light emitting elements of the two corresponding two outermost pixels adjacent to each other in the horizontal direction among the plurality of display panels is the same as the first pitch, and the pitch of the light emitting elements of the two corresponding outermost pixels in the horizontal direction among the plurality of display panels is the same as the first pitch, and The pitch of the light emitting devices of the two adjacent two corresponding outermost pixels may be the same as the second pitch.

In the present invention, by connecting display panels through contact wires exposed to the side, the connection method is simplified, manufacturing costs are reduced, and thickness and weight are reduced.

In addition, the present invention has the effect of reducing manufacturing costs and minimizing image distortion by providing elasticity to the contact wiring exposed to the side.

1 is a cross-sectional view showing a display panel according to a first embodiment of the present invention.
Figure 2 is a cross-sectional view showing a display device including a display panel according to a first embodiment of the present invention.
Figure 3 is a plan view showing a display device including a display panel according to a first embodiment of the present invention.
Figure 4 is a plan view showing a display device including a display panel according to a second embodiment of the present invention.
Figure 5 is a plan view showing a display device including a display panel according to a third embodiment of the present invention.
Figure 6 is a plan view showing a display device including a display panel according to a fourth embodiment of the present invention.
Figure 7 is a cross-sectional view showing a display panel according to a fifth embodiment of the present invention.
Figure 8 is a cross-sectional view showing a display device including a display panel according to a fifth embodiment of the present invention.
Figure 9 is a cross-sectional view showing a display panel according to a sixth embodiment of the present invention.
Figure 10 is a perspective view showing the contact wiring and support of the display panel according to the sixth embodiment of the present invention.

Hereinafter, specific details of the present invention will be described in detail with reference to the attached drawings.

1 is a cross-sectional view showing a display panel according to a first embodiment of the present invention.

As shown in FIG. 1, the display panel 110 according to the first embodiment of the present invention includes first and second substrates 120 and 170, which face each other and are spaced apart from each other. 170), the light emitting element 150 and the pixel circuit 152 disposed in the active area (AA), and the contact wire 154 disposed in the pad area (PA) between the first and second substrates 120 and 170. Includes.

Specifically, the first and second substrates 120 and 170 include an active area (AA) at the center and a pad area (PA) at the edge, and the active area (AA) includes a plurality of pixels, as shown in FIG. 1. For convenience of explanation, one pixel is shown.

First and second signal wires 122 and 124 are disposed in the active area (AA) on the top of the first substrate 120, and a first pad 126 is disposed in the pad area (PA) on the top of the first substrate 120. is disposed, the first and second signal wires 122, 124 and the first pad 126 may be made of the same layer and the same material, and the first pad 126 may be formed of the first and second signal wires 122 , 124).

In the first embodiment, it is exemplified that the first and second signal wires 122 and 124 are disposed in the active area (AA) on the upper part of the first substrate 120, but in other embodiments, a plurality of first and second signal wires Signal wires 122 and 124 may be disposed.

Third and fourth signal wires 130 and 132 are disposed in the active area (AA) on the top of the first substrate 120, and a second pad 134 is placed in the pad area (PA) on the top of the first substrate 120. are disposed, the third and fourth signal wires 130, 132 and the second pad 134 may be made of the same layer and the same material, and the second pad 134 may be formed of the third and fourth signal wires 130. , 132).

The fourth signal wire 132 is disposed on the first and second signal wires 122 and 124, and an insulating layer 128 is disposed between the first signal wire 122 and the fourth signal wire 132. The first signal wire 122 and the fourth signal wire 132 are electrically insulated, and the second signal wire 124 and the fourth signal wire 132 contact each other and are electrically connected.

The second pad 134 is in contact with the first pad 126, and the first and second pads 126 and 134 are electrically connected.

A support ball 140 is disposed in the active area (AA) on the top of the first substrate 120, a first contact ball 142 is disposed on the third and fourth signal wires 130 and 132, and a second A second contact ball 144 is disposed on the pad 134.

The support ball 140 may be made of an insulating material, and the first and second contact balls 142 and 144 may be made of a conductive material. The support ball 144 and the first and second contact balls 142 and 144 ) may be spherical in shape.

A light emitting element 150 is disposed on the first contact ball 142 above the support ball 140 and the third signal wire 130, and the first contact is placed on the third and fourth signal wires 130 and 132. A pixel circuit 152 is disposed on the ball 142.

That is, the light emitting device 150 is supported by the support ball 140 and the first contact ball 142 and is electrically connected to the third signal wire 130 through the first contact ball 142. The pixel circuit 152 is supported by the first contact ball 142 and is electrically connected to the third and fourth signal wires 130 and 132 through the first contact ball 142.

The light emitting device 150 may be a light emitting diode (LED) that emits one of red light, green light, and blue light, and the pixel circuit 152 supplies a voltage or current corresponding to image data to the light emitting device 150. It may be an integrated circuit (IC) that supplies power to drive the light emitting device 150.

A contact wire 154 is disposed on the second contact ball 144, and a support 160 is disposed on the contact wire 154.

That is, the support 160 and the contact wire 154 are supported by the second contact ball 144, and the contact wire 154 is electrically connected to the second pad 134 through the second contact ball 144. do.

The support 160 serves to maintain the gap between the first and second substrates 120 and 170 while supporting the contact wire 154, and may be made of an insulating material and may be formed of a plurality of hexahedral shapes or square pillars. It can be a shape.

The contact wire 154 is in contact with the lower surface, side, and part of the upper surface of the support 160 and has an asymmetric “ㄷ” shape in cross section, and one side of the support 160 is the first substrate 120 or the second substrate. It is arranged to protrude from one side of (170).

Accordingly, a portion of the contact wire 154 in contact with one side of the support 160 protrudes from one side of the first substrate 120 or the second substrate 170 and is exposed to the outside of the display panel 110. , a portion of the exposed contact wiring 154 has a flat surface.

A pillar 162 is disposed on the front of the first substrate 120 above the light emitting device 150 and the pixel circuit 152, and a second substrate 170 is disposed on the pillar 162 and the support 160.

That is, the second substrate 170 is in contact with the upper surface of the support 160 and is supported by the support 160, and the filler 162 is between the first and second substrates 120 and 170 and the support 160. The light emitting element 150 and the pixel circuit 152 are protected by filling the space.

In the first embodiment, the first substrate 120 has a larger area than the second substrate 170, so one side of the first substrate 120 is disposed outside one side of the second substrate 170. However, in another embodiment, the first substrate 120 has the same area as the second substrate 170 or the first substrate 120 has a smaller area than the second substrate 170, so that the first substrate 120 has a smaller area than the second substrate 170. One side may be arranged in line with one side of the second substrate 170, or one side of the first substrate 120 may be disposed inside one side of the second substrate 170.

In the display panel 110 according to the first embodiment of the present invention, the light emitting element 150 and the pixel circuit 152 in the active area (AA) are connected to the first to fourth signal wires 122, 124, 130, and 132. ) is electrically connected to the first and second pads 126 and 134, and the contact wire 154 electrically connected to the first and second pads 126 and 134 is connected to the outside of the display panel 110. It protrudes and is exposed.

The plurality of display panels 110 constituting the display device are electrically connected to each other using contact wires 154 that protrude and are exposed to the outside, which will be described with reference to the drawings.

Figure 2 is a cross-sectional view showing a display device including a display panel according to a first embodiment of the present invention, and Figure 3 is a plan view showing a display device including a display panel according to a first embodiment of the present invention. The description will be made with reference to Figure 1.

As shown in Figures 2 and 3, the display device according to the first embodiment of the present invention includes a plurality of display panels 110 that are electrically connected to each other through contact wires 154.

Specifically, each active area (AA) of the plurality of display panels 110 includes a plurality of pixels, and each of the plurality of pixels includes a light emitting element 150 and a pixel circuit 152.

Here, the light emitting devices 150 of two horizontally adjacent pixels are spaced apart by a first pitch (P1), and the light emitting devices 150 of two vertically adjacent pixels are spaced apart by a second pitch (P2).

Contact wires 154 and supports 160 are disposed on at least one side of the pad area (PA) of each of the plurality of display panels 110. The contact wires 154 are composed of a plurality of contact wires 154 spaced apart by a third pitch (P3). Additionally, the support 160 may have the shape of a plurality of hexahedrons or square pillars supporting a plurality of contact wires 154.

The flat surface of the contact wire 154 is exposed to the outside of each display panel 110.

Here, the flat surface of the contact wire 154 protrudes from the side edge SE of the first or second substrate 120 or 170 to form the panel boundary PB of the display panel 110.

A plurality of display panels 110 are arranged in the form of tiles on a frame (not shown), and the exposed flat surfaces (i.e., panel boundaries (PB)) of the contact wires 154 of two adjacent display panels 110 are adjacent to each other. While the two adjacent display panels 110 are electrically connected to each other, the side edges SE of the first substrate 120 of the two adjacent display panels 110 are spaced apart from each other, and the two adjacent display panels (110) are electrically connected to each other. The side edges SE of the second substrate 170 of 110) are spaced apart from each other.

Here, the light emitting elements 150 of the two outermost pixels of the two horizontally adjacent display panels 110 are spaced apart by a fourth pitch (P4), and the fourth pitch (P4) is equal to the first pitch (P1). By arranging the plurality of display panels 110 to have the same value (P4=P1) as ), it is possible to prevent the horizontal boundary between the plurality of display panels 110 from being visible.

Although not shown, a plurality of display panels 110 are arranged so that the pitch of the light emitting elements 150 of the two outermost pixels of the two vertically adjacent display panels 110 has the same value as the second pitch P2. By arranging , it is possible to prevent the vertical boundary between the plurality of display panels 110 from being visible.

As described above, in the display device according to the first embodiment of the present invention, a plurality of display panels 110 are mounted in the form of tiles, and the exposed flat surface of the contact wire 154 is used to display a plurality of display panels 110. ) is electrically connected, the connection method is simplified, manufacturing costs are reduced, and thickness and weight are reduced.

Meanwhile, in another embodiment, the width and pitch of the contact wire can be changed, which will be described with reference to the drawings.

Figure 4 is a plan view showing a display device including a display panel according to a second embodiment of the present invention, and description of the same parts as the first embodiment is omitted.

As shown in FIG. 4, the display device according to the second embodiment of the present invention includes a plurality of display panels 210 that are electrically connected to each other through contact wires 254.

The contact wires 254 disposed in the pad area (PA) on at least one side of each of the plurality of display panels 210 have a larger width than the contact wires 154 of the first embodiment and have a third pitch ( It may be made up of multiple pieces spaced apart by a fifth pitch (P5) that is larger than P3).

In this way, the width and separation distance of the contact wire 254 can be varied depending on the arrangement structure of the light emitting element 250 and the pixel circuit 252.

In the first and second embodiments, one pixel circuit drives one light-emitting device as an example, but in other embodiments, one pixel circuit may drive multiple light-emitting devices, which is explained with reference to the drawings. do.

5 and 6 are plan views showing a display device including a display panel according to the third and fourth embodiments of the present invention, respectively, and descriptions of the same parts as those of the first and second embodiments are omitted.

As shown in FIG. 5, the display device according to the fifth embodiment of the present invention includes a plurality of display panels 310 that are electrically connected to each other through contact wires 154.

Specifically, each active area (AA) of the plurality of display panels 310 includes a plurality of pixels, each of the plurality of pixels includes a light emitting element 350, and the pixel circuit 352 is located between four adjacent pixels. It is placed in and drives the light emitting elements 350 of four adjacent pixels.

In the third embodiment, the pixel circuit 352 is arranged between four pixels to drive the light emitting elements 350 of four adjacent pixels, but in other embodiments, the pixel circuit is arranged between at least two pixels. It is possible to drive the light emitting devices of at least two adjacent pixels.

Here, the light emitting devices 350 of two horizontally adjacent pixels are spaced apart by a first pitch (P1), and the light emitting devices 350 of two vertically adjacent pixels are spaced apart by a second pitch (P2).

Contact wires 354 and supports 360 are disposed on at least one side of the pad area (PA) of each of the plurality of display panels 310. The contact wires 354 are composed of a plurality of contact wires 354 spaced apart by a third pitch (P3). Additionally, the support 360 may have a square pillar shape supporting a plurality of contact wires 354.

The flat surface of the contact wire 354 is exposed to the outside of each display panel 310.

Here, the flat surface of the contact wire 354 protrudes from the side edge SE of the first or second substrate 320 or 370 to form the panel boundary PB of the display panel 310.

A plurality of display panels 310 are arranged in the form of tiles on a frame (not shown), and the exposed flat surfaces (i.e., panel boundaries (PB)) of the contact wires 354 of two adjacent display panels 310 are adjacent to each other. While the two adjacent display panels 310 are electrically connected to each other, the side edges SE of the first substrate 320 of the two adjacent display panels 110 are spaced apart from each other, and the two adjacent display panels (110) are electrically connected to each other. The side edges SE of the second substrate 370 of 310) are spaced apart from each other.

Here, the light emitting elements 350 of the two outermost pixels of the two horizontally adjacent display panels 310 are spaced apart by a fourth pitch (P4), and the fourth pitch (P4) is equal to the first pitch (P1). ) by arranging the plurality of display panels 110 to have the same value (P4=P1), it is possible to prevent the boundary between the plurality of display panels 110 from being visible.

As shown in FIG. 6, the display device according to the fourth embodiment of the present invention includes a plurality of display panels 410 that are electrically connected to each other through contact wires 454.

The contact wires 454 disposed in the pad area (PA) on at least one side of each of the plurality of display panels 410 have a larger width than the contact wires 454 of the first embodiment and have a third pitch ( It may be made up of multiple pieces spaced apart by a fifth pitch (P5) that is larger than P3).

In this way, the width and separation distance of the contact wire 454 can be varied depending on the arrangement structure of the light emitting element 450 and the pixel circuit 452.

As described above, in the display device according to the third and fourth embodiments of the present invention, a plurality of display panels 310 and 410 are mounted in the form of tiles, and the exposed flat surfaces of the contact wires 354 and 454 are used. By electrically connecting the plurality of display panels 310 and 410, the connection method is simplified, manufacturing costs are reduced, and thickness and weight are reduced.

And, by allowing one pixel circuit 452 to drive four light emitting elements 450, the weight is reduced and material costs are reduced.

Meanwhile, in another embodiment, the exposed portion of the contact wire may have a curved surface, which will be described with reference to the drawings.

Figure 7 is a cross-sectional view showing a display panel according to a fifth embodiment of the present invention, and description of the same parts as those of the first to fourth embodiments is omitted.

As shown in FIG. 7, the display panel 510 according to the fifth embodiment of the present invention includes first and second substrates 520 and 570 facing each other and spaced apart from each other. A light emitting element 550 and a pixel circuit 552 disposed in the active area (AA) between 570) and a contact wire 554 disposed in a pad area (PA) between the first and second substrates 520 and 570. Includes.

Specifically, the first and second substrates 520 and 570 include an active area (AA) at the center and a pad area (PA) at the edge, and the active area (AA) includes a plurality of pixels, as shown in FIG. 7. For convenience of explanation, one pixel is shown.

First and second signal wires 522 and 524 are disposed in the active area (AA) on the top of the first substrate 520, and a first pad 526 is placed in the pad area (PA) on the top of the first substrate 520. are disposed, the first and second signal wires 522, 524 and the first pad 526 may be made of the same layer and the same material, and the first pad 526 may be formed of the first and second signal wires 522. , 524).

Third and fourth signal wires 530 and 532 are disposed in the active area (AA) on the top of the first substrate 520, and a second pad 534 is placed in the pad area (PA) on the top of the first substrate 520. are disposed, the third and fourth signal wires 530, 532 and the second pad 534 may be made of the same layer and the same material, and the second pad 534 may be formed of the third and fourth signal wires 530. , 532).

The fourth signal wire 532 is disposed on the first and second signal wires 522 and 524, and an insulating layer 528 is disposed between the first signal wire 522 and the fourth signal wire 532. The first signal wire 522 and the fourth signal wire 532 are electrically insulated, and the second signal wire 524 and the fourth signal wire 532 contact each other and are electrically connected.

The second pad 534 is in contact with the first pad 526, and the first and second pads 526 and 534 are electrically connected.

A support ball 540 is disposed in the active area (AA) on the top of the first substrate 520, a first contact ball 542 is disposed on the third and fourth signal wires 530 and 532, and a second A second contact ball 544 is disposed on the pad 534.

A light emitting element 550 is disposed on the first contact ball 542 above the support ball 540 and the third signal wire 530, and the first contact is placed on the third and fourth signal wires 530 and 532. A pixel circuit 552 is disposed on the ball 542.

That is, the light emitting device 550 is supported by the support ball 540 and the first contact ball 542 and is electrically connected to the third signal wire 530 through the first contact ball 542. The pixel circuit 552 is supported by the first contact ball 542 and is electrically connected to the third and fourth signal wires 530 and 532 through the first contact ball 542.

A contact wire 554 is disposed on the second contact ball 544, and a support plate 556 is disposed on the contact wire 554.

That is, the support plate 556 and the contact wire 554 are supported by the second contact ball 544, and the contact wire 554 is electrically connected to the second pad 534 through the second contact ball 544. do.

The support plate 556 serves to support the contact wire 554, may be made of an insulating material, and may have a hexahedral shape or a square pillar shape.

The contact wire 554 is in contact with the lower surface of the support plate 556 and has an asymmetric “ㄷ” shape in cross section, and a portion of the contact wire 554 extending and protruding from the support plate 556 is connected to the first substrate 520. Alternatively, it protrudes from one side of the second substrate 570 and is exposed to the outside of the display panel 510, and a portion of the exposed contact wire 554 has a curved surface with a radius of curvature (r).

A filler 562 is disposed on the front of the first substrate 520 above the light emitting element 550 and the pixel circuit 552, and a spacer 564 is disposed on the top of the support plate 556. The filler 562 and the spacer ( 564) A second substrate 570 is disposed on the top, and a sealant 566 is disposed on a portion of the upper surface of the contact wire 554 and the outer surface of the support plate 556 and the spacer 564.

That is, the second substrate 570 is in contact with the upper surface of the spacer 564 and supported by the spacer 564 and the support plate 556, and the spacer 564 is positioned between the first and second substrates 520 and 570. It plays a role in maintaining the separation distance. In addition, the filler 562 fills the space between the first and second substrates 520 and 570, the spacer 564, and the support plate 556 to protect the light emitting element 550 and the pixel circuit 552, and sealant ( 566 protects the support plate 556 and the spacer 564, and the sealant 566 may serve to prevent external moisture from penetrating into the display panel 510.

In the display panel 510 according to the fifth embodiment of the present invention, the light emitting element 550 and the pixel circuit 552 in the active area (AA) have first to fourth signal wires 522, 524, 530, and 532. ) is electrically connected to the first and second pads 526 and 534, and the contact wire 554 electrically connected to the first and second pads 526 and 534 is connected to the outside of the display panel 510. It protrudes and is exposed.

Figure 8 is a cross-sectional view showing a display device including a display panel according to a fifth embodiment of the present invention, which will be described with reference to Figure 7.

As shown in FIG. 8, the display device according to the fifth embodiment of the present invention includes a plurality of display panels 510 that are electrically connected to each other through contact wires 554.

Specifically, the active area AA of each of the display panels 510 includes a plurality of pixels, and each of the plurality of pixels includes a light emitting element 550 and a pixel circuit 552.

A contact wire 554 and a support plate 556 are disposed on at least one side of the pad area (PA) of each of the plurality of display panels 510. The contact wires 554 are comprised of a plurality of pieces spaced apart from each other, and the support plate 556 may have a square pillar shape supporting a plurality of contact wires 554.

The curved surface of the contact wire 554 is exposed to the outside of each display panel 510.

Here, the curved surface of the contact wire 554 protrudes from the side edge of the first or second substrate 520 or 570 to form a panel boundary of the display panel 510.

A plurality of display panels 510 are arranged in the form of tiles on a frame (not shown), and the exposed curved surfaces (i.e., panel boundaries) of the contact wires 554 of two adjacent display panels 510 are in contact with each other to form two adjacent display panels 510. While the display panels 510 are electrically connected to each other, the side edges of the first substrates 520 of the two adjacent display panels 510 are spaced apart from each other, and the second substrates of the two adjacent display panels 510 ( The side edges of 570) are spaced apart from each other.

As described above, in the display device according to the fifth embodiment of the present invention, a plurality of display panels 510 are mounted in the form of tiles, and the exposed curved surface of the contact wire 554 is used to form a plurality of display panels 510. By electrically connecting, the connection method is simplified, manufacturing costs are reduced, and thickness and weight are reduced.

In addition, the exposed portion of the contact wire 554 is formed as a curved surface with a radius of curvature (r), thereby increasing the elasticity of the contact wires 554 in contact with each other, thereby improving the stability of the electrical connection.

Meanwhile, in another embodiment, the exposed surface of the contact wire may be spaced apart from the support and have a curved surface, which will be described with reference to the drawings.

Figure 9 is a cross-sectional view showing the display panel according to the sixth embodiment of the present invention, and Figure 10 is a perspective view showing the contact wiring and support of the display panel according to the sixth embodiment of the present invention, first to fifth. Descriptions of parts that are the same as those in the embodiment are omitted.

As shown in FIGS. 9 and 10, the display panel 610 according to the sixth embodiment of the present invention includes first and second substrates 620 and 670, which face each other and are spaced apart from each other. The light emitting element 650 and the pixel circuit 652 disposed in the active area (AA) between (620, 670), and the contact wiring disposed in the pad area (PA) between the first and second substrates (620, 670) Includes (654).

Specifically, the first and second substrates 620 and 670 include an active area (AA) at the center and a pad area (PA) at the edge, and the active area (AA) includes a plurality of pixels, as shown in FIG. 9. For convenience of explanation, one pixel is shown.

First and second signal wires 622 and 624 are disposed in the active area (AA) on the top of the first substrate 620, and a first pad 626 is disposed in the pad area (PA) on the top of the first substrate 620. is disposed, the first and second signal wires 622, 624 and the first pad 626 may be made of the same layer and the same material, and the first pad 626 may be formed of the first and second signal wires 622. , 624).

Third and fourth signal wires 630 and 632 are disposed in the active area (AA) on the top of the first substrate 620, and a second pad 634 is placed in the pad area (PA) on the top of the first substrate 620. are disposed, and the third and fourth signal wires 630, 632 and the second pad 634 may be made of the same layer and the same material, and the second pad 634 may be formed of the third and fourth signal wires 630. , 632).

The fourth signal wire 632 is disposed on the first and second signal wires 622 and 624, and an insulating layer 628 is disposed between the first signal wire 622 and the fourth signal wire 632. The first signal wire 622 and the fourth signal wire 632 are electrically insulated, and the second signal wire 624 and the fourth signal wire 632 contact each other and are electrically connected.

The second pad 634 is in contact with the first pad 626, and the first and second pads 626 and 634 are electrically connected.

A support ball 640 is disposed in the active area (AA) on the top of the first substrate 620, a first contact ball 642 is disposed on the third and fourth signal wires 630 and 632, and a second A second contact ball 644 is disposed on the pad 634.

A light emitting element 650 is disposed on the first contact ball 642 above the support ball 640 and the third signal wire 630, and the first contact is placed on the third and fourth signal wires 630 and 632. A pixel circuit 652 is disposed on the ball 642.

That is, the light emitting device 650 is supported by the support ball 640 and the first contact ball 642 and is electrically connected to the third signal wire 630 through the first contact ball 642. The pixel circuit 652 is supported by the first contact ball 642 and is electrically connected to the third and fourth signal wires 630 and 632 through the first contact ball 642.

A contact wire 654 is disposed on the second contact ball 644, and a support 660 is disposed on the contact wire 654.

That is, the support 660 and the contact wire 654 are supported by the second contact ball 644, and the contact wire 654 is electrically connected to the second pad 634 through the second contact ball 644. do.

The support 660 serves to maintain the gap between the first and second substrates 620 and 670 while supporting the contact wire 654, and may be made of an insulating material and may be formed of a plurality of hexahedral shapes or square pillars. It can be a shape.

The contact wire 654 is in contact with the lower and upper surfaces of the support 660 and is spaced apart from the side of the support 660, so that its cross-section has a symmetrical "ㄷ" shape, and is spaced apart from the side of the support 660 and protrudes. A portion of the wiring 654 protrudes from one side of the first substrate 620 and is exposed to the outside of the display panel 610. The exposed portion of the contact wiring 654 has a curved surface with a radius of curvature r.

The contact wires 654 may be comprised of multiple contact wires spaced apart from each other.

A filler 662 is disposed on the front of the first substrate 620 above the light emitting element 650 and the pixel circuit 652, and a spacer 664 is disposed on the top of the contact wire 654 that is in contact with the upper surface of the support 660. The second substrate 670 is disposed on the pillar 662 and the spacer 664, and the sealant 66 is disposed on a portion of the upper surface of the contact wire 654 and the outer surface of the spacer 664.

That is, the second substrate 670 is in contact with the upper surface of the spacer 664 and supported by the spacer 664 and the support 660, and the spacer 664 is positioned between the first and second substrates 620 and 670. It plays a role in maintaining the separation distance. In addition, the filler 662 protects the light emitting element 650 and the pixel circuit 652 by filling the space between the first and second substrates 620 and 670, the spacer 664, and the support 660, and sealant ( 666 protects the spacer 664, and the sealant 666 may serve to prevent external moisture from penetrating into the display panel 610.

In the display panel 610 according to the sixth embodiment of the present invention, the light emitting element 650 and the pixel circuit 652 in the active area (AA) have first to fourth signal wires 622, 624, 630, and 632. ) is electrically connected to the first and second pads 626 and 634, and a contact wire 654 electrically connected to the first and second pads 626 and 634 is connected to the outside of the display panel 610. It protrudes and is exposed.

As described above, in the display device according to the sixth embodiment of the present invention, a plurality of display panels 610 are mounted in the form of tiles, and the exposed curved surface of the contact wire 654 is used to form a plurality of display panels 610. By electrically connecting, the connection method is simplified, manufacturing costs are reduced, and thickness and weight are reduced.

Additionally, the exposed portion of the contact wire 654 is formed as a curved surface with a radius of curvature (r), thereby increasing the elasticity of the contact wires 654 in contact with each other, thereby improving the stability of the electrical connection.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the technical spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

110: display panel 120, 170: first and second substrates
126, 134: first and second pad 150: light emitting device
152: pixel circuit 154: contact wiring

Claims (9)

First and second substrates facing each other and spaced apart from each other and including an active area and a pad area;
at least one signal wire disposed in the active area on the top of the first substrate;
a light emitting element and a pixel circuit connected to the at least one signal wire;
at least one pad disposed in the pad area on the top of the first substrate;
at least one contact wire connected to the at least one pad, a portion of which is exposed and protrudes from one side of the first and second substrates;
A supporter disposed on the at least one contact wire and having one side protruding from one side of the first and second substrates.
Including,
The at least one contact wire is in contact with a portion of the lower surface, side surface, and upper surface of the support and has an asymmetric “L” shape in cross section,
A display panel wherein a portion of the at least one contact wire that is exposed has a flat surface.
delete According to claim 1,
The active area includes a plurality of pixels,
A display panel wherein the light emitting element and the pixel circuit are disposed in each of the plurality of pixels, so that one pixel circuit drives one light emitting element.
According to claim 1,
The active area includes a plurality of pixels,
The light emitting element is disposed in each of the plurality of pixels,
The display panel wherein the pixel circuit is disposed between at least two of the plurality of pixels, and one of the pixel circuits drives at least two light emitting elements of the plurality of pixels.
First and second substrates facing each other and spaced apart from each other and including an active area and a pad area;
at least one signal wire disposed in the active area on the top of the first substrate;
a light emitting element and a pixel circuit connected to the at least one signal wire;
at least one pad disposed in the pad area on the top of the first substrate;
at least one contact wire connected to the at least one pad, a portion of which is exposed and protrudes from one side of the first and second substrates;
a support plate disposed on the at least one contact wire;
A spacer disposed on the upper part of the support plate
Including,
The at least one contact wire is in contact with the lower surface of the support plate and has an asymmetric “ㄷ” shape in cross section,
A display panel wherein a portion of the at least one exposed contact wire has a curved surface.
First and second substrates facing each other and spaced apart from each other and including an active area and a pad area;
at least one signal wire disposed in the active area on the top of the first substrate;
a light emitting element and a pixel circuit connected to the at least one signal wire;
at least one pad disposed in the pad area on the top of the first substrate;
at least one contact wire connected to the at least one pad, a portion of which is exposed and protrudes from one side of the first and second substrates;
a support arranged on top of the at least one contact wire;
A spacer disposed on the upper part of the support
Including,
The at least one contact wire is in contact with the lower and upper surfaces of the support and has a symmetrical “L” shape in cross section,
A display panel wherein a portion of the at least one exposed contact wire has a curved surface.
According to claim 1,
a support ball disposed between the first substrate and the light emitting device;
a first contact ball disposed between the at least one signal wire and the light emitting element and between the at least one signal wire and the pixel circuit;
a second contact ball disposed between the at least one pad and the at least one contact wire;
A filler that fills the space between the light emitting device and the pixel circuit and the second substrate.
A display panel further comprising:
A display device including a plurality of display panels,
Each of the plurality of display panels,
First and second substrates facing each other and spaced apart from each other and including an active area and a pad area;
at least one signal wire disposed in the active area on the top of the first substrate;
a light emitting element and a pixel circuit connected to the at least one signal wire;
at least one pad disposed in the pad area on the top of the first substrate;
at least one contact wire connected to the at least one pad, a portion of which is exposed and protrudes from one side of the first and second substrates;
A supporter disposed on the at least one contact wire and having one side protruding from one side of the first and second substrates.
Including,
The at least one contact wire is in contact with a portion of the lower surface, side surface, and upper surface of the support and has an asymmetric “L” shape in cross section,
A portion of the at least one contact wire that is exposed has a flat surface,
A display device in which the at least one contact wire of two adjacent display panels among the plurality of display panels contacts each other and is electrically connected.
According to claim 8,
The active area includes a plurality of pixels,
Among the plurality of pixels, two horizontally adjacent light emitting elements are spaced apart by a first pitch,
Among the plurality of pixels, two vertically adjacent light emitting elements are spaced apart by a second pitch,
The pitch of the light emitting elements of the two corresponding outermost pixels that are horizontally adjacent among the plurality of display panels is the same as the first pitch,
A display device wherein the pitch of the light emitting elements of two corresponding two outermost pixels adjacent to each other in the vertical direction among the plurality of display panels is the same as the second pitch.