TWI839096B - Display device and tiling display - Google Patents

Abstract

A display device includes a display panel and a testing structure. The display panel has a first surface, a second surface opposing to the first surface, a side surface disposed between the first surface and the second surface, and a display area disposed on the first surface. The testing structure includes a first contact pad, a first testing pad, a second contact pad, a second testing pad, and a first bridge circuit. The first contact pad, the first testing pad, the second contact pad, and the second testing pad are disposed on the second surface. The first bridge circuit is disposed on the display panel, covers, and electrically contacts the first contact pad and the second contact pad. The first bridge circuit arranges on the second surface and the side surface, and is free of disposed on the first surface.

Description

Displays and tiled displays

The present invention relates to a display device and a spliced display.

In the field of display device technology, narrow-frame or frameless display devices can provide a larger display area and can be applied to spliced products. The peripheral area of the display device is provided with a general driving structure and a test structure for monitoring resistance. However, if the test structure is too close to the electronic components in the display area, electrostatic discharge (ESD) may occur and cause damage to the electronic components.

In order to solve the above problems and overcome the shortcomings of the prior art, the present disclosure provides a display device and a spliced display, which can prevent the electronic components in the display area of the display device from being damaged due to ESD.

The display device provided by at least one embodiment of the present invention includes a display panel and a test structure. The display panel has a first surface and a second surface opposite to each other, a side surface arranged between the first surface and the second surface, and a display area arranged on the first surface. The test structure includes a first contact pad, a first test pad, a second contact pad, a second test pad, and a first bridge circuit. The first contact pad is arranged on the second surface. The first test pad is arranged on the second surface and electrically connected to the first contact pad. The second contact pad is arranged on the second surface. The second test pad is arranged on the second surface and electrically connected to the second contact pad. The first bridge circuit is arranged on the display panel and electrically connects the first contact pad and the second contact pad, wherein the first bridge circuit covers the first contact pad and the second contact pad, the first bridge circuit is distributed on the second surface and the side surface, and the first bridge circuit is not distributed on the first surface.

In at least one embodiment of the present invention, the side surface of the display panel includes a first inclined surface, a plane and a second inclined surface, the plane is arranged between the first inclined surface and the second inclined surface, the first inclined surface is arranged between the first surface and the plane, and the second inclined surface is arranged between the second surface and the plane.

In at least one embodiment of the present invention, the first bridge line extends from the second surface to the second inclined surface.

In at least one embodiment of the present invention, the first bridge line extends from the second surface through the second inclined surface to the plane.

In at least one embodiment of the present invention, the first bridge line extends from the second surface through the second inclined surface and the plane to the first inclined surface.

In at least one embodiment of the present invention, the display device further includes a plurality of test structures, wherein a plurality of first test pads and a plurality of second test pads of the plurality of test structures are disposed on the second surface and adjacent to the second inclined surface.

In at least one embodiment of the present invention, a side of the first contact pad is aligned with a side of the first test pad, and a side of the second contact pad is aligned with a side of the second test pad.

In at least one embodiment of the present invention, the display device further includes an insulating layer, wherein the insulating layer covers the peripheral area, the side surface, the first contact pad, the first test pad, the second contact pad, and the second test pad disposed on the first surface.

In at least one embodiment of the present invention, the display device further includes a third contact pad, a fourth contact pad, and a second bridge circuit. The third contact pad is disposed in a peripheral area of the first surface, wherein the third contact pad is electrically connected to the pixel array. The fourth contact pad is disposed on the second surface. The second bridge circuit electrically connects the third contact pad and the fourth contact pad, wherein the second bridge circuit extends from the first surface through the side surface and to the second surface.

At least one embodiment of the present invention provides a spliced display comprising a plurality of the aforementioned display panels, wherein a plurality of display devices are regularly arranged and connected to each other.

Based on the above, since the bridge circuit of the test structure is far away from the electronic components in the display area, it is possible to avoid the situation where the electronic components in the surrounding area of the display device are damaged due to ESD.

The following will describe the above description in detail with an implementation method and provide a further explanation of the technical solution of the present disclosure.

The following disclosure provides many different implementations or examples for implementing different features of the present disclosure. Specific implementations of components and arrangements are described below to simplify the present disclosure. These are of course only examples and are not intended to be limiting. For example, in the subsequent description, the formation of a first feature over or on a second feature may include implementations in which the first feature and the second feature are formed to be in direct contact, and may also include implementations in which another feature may be formed between the first feature and the second feature so that the first feature and the second feature are not in direct contact. In addition, the present disclosure may repeat numbers or text in different examples. The purpose of repetition is to simplify and clarify the description, not to define the relationship between the different implementations and configurations discussed.

In addition, spatially relative terms such as "below", "below", "lower than", "above", "above" and other similar terms are used here to conveniently describe the relationship between one element or feature in the figure and another element or feature. In addition to covering the orientation depicted in the figure, the spatially relative terms also cover other orientations of the device when it is in use or operation. (Option 1) That is, when the orientation of the device is different from the figure (rotated 90 degrees or in other orientations), the spatially relative terms used in this disclosure can also be interpreted accordingly.

It will be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The following will disclose multiple embodiments of the present disclosure with drawings. For the purpose of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the content of the present disclosure. In other words, in some embodiments of the present disclosure, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly used structures and components will be depicted in the drawings in a simple schematic manner.

The directions X, Y, and Z are marked in the drawings of the present case to show the configuration relationship of each component in the drawings. The directions X, Y, and Z intersect with each other, but are not limited to being orthogonal to each other. FIG. 1A is a three-dimensional perspective view of a display device 100 showing a portion according to an embodiment of the present disclosure. Referring to FIG. 1A , the display device 100 includes a display panel 110. The display panel 110 has a first surface 112 and a second surface 116 opposite to each other, and a side surface 114 disposed between the first surface 112 and the second surface 116. The side surface 114 of the display panel 110 includes a first inclined surface S1, a plane PS, and a second inclined surface S2. The plane PS is disposed between the first inclined surface S1 and the second inclined surface S2. The first inclined surface S1 is disposed between the first surface 112 and the plane PS, and the second inclined surface S2 is disposed between the second surface 116 and the plane PS.

In the embodiment shown in FIG. 1A , the first inclined surface S1, the plane PS, and the second inclined surface S2 can all be planes, and the normal directions of the three are different from the normal directions of the first surface 112 and the second surface 116. For example, the first surface 112 is parallel to the plane in the direction X-direction Y, but the plane PS is parallel to the plane in the direction Y-direction Z, wherein the first inclined surface S1 and the second inclined surface S2 are not parallel to the plane in the direction X-direction Y and the plane in the direction Y-direction Z.

The normal direction of the first surface 112 and the normal direction of the second surface 116 may be parallel to each other, but not limited thereto. For example, the first surface 112 and the second surface 116 are parallel to a plane in the direction X-direction Y. In addition, in other embodiments, the first inclined surface S1 and/or the second inclined surface S2 may be a curved surface, or a curved surface or inclined surface formed by a combination of a plurality of planes.

The display device 100 further includes a test structure 120 and a drive structure 130. It should be understood that the display panel 110 is a plate-like object that can carry components (such as the test structure 120 and the drive structure 130). The display panel 110 may include a glass substrate or a printed circuit board. The test structure 120 and the drive structure 130 are disposed on the surface of the display panel 110. As shown in FIG. 1A, the test structure 120 and the drive structure 130 are both three-dimensional circuit structures.

The display region R1 is disposed on the first surface 112. The display region R1 may include a pixel array (not shown), wherein the pixel array includes a thin film transistor device and a plurality of signal lines (not shown), and these signal lines are, for example, data lines and scan lines. The peripheral region R2 is disposed on the first surface 112. The peripheral region R2 is closer to the first inclined surface S1 of the side surface 114 than the display region R1, and a portion of the driving structure 130 is disposed in the peripheral region R2.

The driving structure 130 is disposed on the first surface 112, the side surface 114 (including the first inclined surface S1, the plane PS and/or the second inclined surface S2) and the second surface 116, as shown in FIG1A. The first surface 112 also includes a functional element 131 configured to drive the display region R1 so that the display device 100 provides a display function. The functional element 131 can be, for example, a gate driver on array (GOA) or a signal selector (multiplexer; MUX), but is not limited thereto. FIG1B will describe in detail the configuration and connection relationship of each element in FIG1A.

FIG. 1B is an unfolded view of the display device 100 of FIG. 1A. Please refer to FIG. 1A and FIG. 1B. FIG. 1B shows the first surface 112, the side surface 114 and the second surface 116 of FIG. 1A as continuous planes, and shows the configuration and connection relationship of various components. Specifically, the display device 100 shown in FIG. 1B is the display device 100 of FIG. 1A unfolded, and the first surface 112, the side surface 114 and the second surface 116 are all flattened, so that the first surface 112, the side surface 114 and the second surface 116 shown in FIG. 1B are coplanar, wherein FIG. 1B also shows the flattened side surface 114, so the first inclined surface S1, the plane PS and the second inclined surface S2 are also coplanar.

The test structure 120 includes a first contact pad 122, a first test pad 124, a second contact pad 126, a second test pad 128, and a first bridge circuit B1. The first contact pad 122, the first test pad 124, the second contact pad 126, and the second test pad 128 are all disposed on the second surface 116 and adjacent to the second inclined surface S2 of the side surface 114. The first test pad 124 and the second test pad 128 are adapted to receive a test signal transmitted by a probe. The first test pad 124 is electrically connected to the first contact pad 122, and the second test pad 128 is electrically connected to the second contact pad 126. The first bridge circuit B1 is electrically connected to and covers the first contact pad 122 and the second contact pad 126. The first bridge circuit B1 is distributed on the second surface 116 and the side surface 114, but the first bridge circuit B1 is not distributed on the first surface 112.

In the implementations shown in FIG. 1A and FIG. 1B , the first bridge line B1 extends from the second surface 116 through the second inclined surface S2 of the side surface 114 to the plane PS of the side surface 114. In other words, the first bridge line B1 does not extend to the first inclined surface S1 of the side surface 114. As shown in FIG. 1B , the first bridge line B1 is a U-shaped line pattern. In addition, in some implementations, the first inclined surface S1 and the second inclined surface S2 may be planes, as shown in FIG. 1A .

Still referring to FIG. 1B , the driving structure 130 includes a third contact pad 132, a fourth contact pad 136, and a second bridge circuit B2. The third contact pad 132 is disposed in the peripheral region R2 of the first surface 112. The third contact pad 132 is electrically connected to the pixel array in the display region R1. The fourth contact pad 136 is disposed on the second surface 116. The second bridge circuit B2 is electrically connected to and covers the third contact pad 132 and the fourth contact pad 136, wherein the second bridge circuit B2 extends from the first surface 112 through the side surface 114 to the second surface 116.

The first bridge circuit B1 and the second bridge circuit B2 can be formed, for example, by sputtering a metal material (e.g., copper) on the surface of the display panel 110, and then covering the metal with a mask layer (e.g., photoresist), and then etching to obtain a patterned circuit, but the method is not limited to this. The display device 100 also includes a third test pad 134, a fourth test pad 138, and a contact pad 135. The third test pad 134 is adjacent to and electrically connected to the third contact pad 132, and the fourth test pad 138 is adjacent to and electrically connected to the fourth contact pad 136. The third test pad 134 and the fourth test pad 138 are suitable for receiving a test signal transmitted by a probe.

In some embodiments, the pad 135 can be used to electrically connect to a flexible printed circuit 139 (FPC, see FIG. 2 ). In some embodiments, the side 122s of the first contact pad 122, the side 126s of the second contact pad 126, the side 136s of the fourth contact pad 136, and the side 138s of the fourth test pad 138 can be aligned with each other, as shown in FIG. 1B . In some embodiments, the side 132s of the third contact pad 132 is aligned with the side 134s of the third test pad 134, as shown in FIG. 1B .

In some embodiments, the sizes of the first contact pad 122, the second contact pad 126, the third contact pad 132, and the fourth contact pad 136 are the same, and the sizes of the first test pad 124, the second test pad 128, the third test pad 134, and the fourth test pad 138 are the same. In some embodiments, the sizes of the first contact pad 122, the second contact pad 126, the third contact pad 132, and the fourth contact pad 136 are all smaller than the sizes of the first test pad 124, the second test pad 128, the third test pad 134, and the fourth test pad 138, as shown in FIG. 1B .

The first test pad 124 and the second test pad 128 are configured to measure the resistance value of the first bridge circuit B1. The third test pad 134 and the fourth test pad 138 are configured to measure the resistance value of the second bridge circuit B2. When the first contact pad 122, the second contact pad 126, the third contact pad 132 and/or the fourth contact pad 136 are in contact with pollutants, such as particles or oil pollution, the resistance value will change. When the above-mentioned contact pads have a smaller size (such as an area), the resistance value of the contact pad in contact with the pollutant will show a more obvious or dramatic change, so as to improve the resistance resolution, thereby enhancing the monitoring function.

Fig. 2 is an expanded view of the display device 100 of Fig. 1B in another embodiment. In the embodiment of Fig. 2, an insulating layer 210 is covered on the display device 100 of Fig. 1B. The insulating layer 210 directly covers the bridge circuit (including the first bridge circuit B1 and the second bridge circuit B2), and the bridge circuit directly covers the contact pad.

The insulating layer 210 can also serve as a protective layer and can reduce the risk of ESD damage to surrounding components in subsequent processes. The insulating layer 210 can also reduce or avoid the risk of short circuits occurring in the first bridge circuit B1, the second bridge circuit B2, the first test pad 124, the second test pad 128, the third test pad 134, and the fourth test pad 138. The insulating layer 210 covers the peripheral region R2, the side surface 114, the first contact pad 122, the first test pad 124, the second contact pad 126, and the second test pad 128 disposed on the first surface 112. Specifically, the insulating layer 210 also covers the first bridge circuit B1, the third contact pad 132, the third test pad 134, the fourth contact pad 136, the fourth test pad 138, and the second bridge circuit B2. In addition, the insulating layer 210 covers the peripheral region R2, but does not cover the functional element 131 electrically connected to the display region R1. In some embodiments, the flexible circuit board 139 covers and is electrically connected to the pad 135.

FIG. 3A is a three-dimensional perspective view of a portion of a display device 300 according to an embodiment of the present disclosure. FIG. 3B is an unfolded view of the display device 300 of FIG. 3A. The display device 100 of FIG. 1A and FIG. 1B differs from the display device 300 of FIG. 3A and FIG. 3B in the circuit patterns of the first bridge circuit B1 of the test structure 120 and the first bridge circuit B3 of the test structure 120a.

3A and 3B , the first bridge circuit B3 has a rectangular circuit pattern and is not like the U-shaped first bridge circuit B1 in FIG. 1B , so the first bridge circuit B3 extends along the direction Y without exposing the lower plane PS, the second inclined surface S2, and the opening or notch of the second surface 116. It should be noted that the display device 300 may be covered with a cover insulating layer 210 as shown in FIG. 2 to prevent the risk of ESD damage to surrounding components and short circuits in subsequent processes.

FIG. 4A is a three-dimensional perspective view of a portion of a display device 400 according to an embodiment of the present disclosure. FIG. 4B is an unfolded view of the display device 400 of FIG. 4A. The display device 300 of FIG. 3A and FIG. 3B differs from the display device 400 of FIG. 4A and FIG. 4B in the circuit patterns of the first bridge circuit B3 of the test structure 120a and the first bridge circuit B4 of the test structure 120b.

4A and 4B , the first bridge line B1 extends from the second surface 116 through the second inclined surface S2 and the plane PS to the first inclined surface S1, but does not extend to the first surface 112. The first bridge line B1 has a rectangular line pattern, that is, the first bridge line B1 extends along the direction Y without exposing the opening or gap of the first inclined surface S1, the plane PS, the second inclined surface S2 and the second surface 116 below. It should be noted that the display device 400 can be covered with an insulating layer 210 as shown in FIG. 2 to prevent the risk of ESD damage to surrounding components and short circuits in subsequent processes.

FIG. 5A is a three-dimensional perspective view of a portion of a display device 500 according to an embodiment of the present disclosure. FIG. 5B is an unfolded view of the display device 500 of FIG. 5A. The display device 300 of FIG. 3A and FIG. 3B differs from the display device 500 of FIG. 5A and FIG. 5B in the circuit patterns of the first bridge circuit B3 of the test structure 120a and the first bridge circuits B3 and B5 of the test structure 120c.

5A and 5B , the first bridge line B5 extends from the second surface 116 to the second inclined surface S2, but does not extend to the plane PS, the first inclined surface S1, and the first surface 112. The first bridge line B1 has a rectangular line pattern, that is, the first bridge line B1 extends along the direction Y without exposing the second inclined surface S2 below and the opening or gap of the second surface 116. It should be noted that the display device 400 can be covered with an insulating layer 210 as shown in FIG. 2 to prevent the risk of ESD damage to surrounding components and short circuits in subsequent processes.

FIG6 is an unfolded view of a display device 600 according to an embodiment of the present disclosure. The unfolded view shown in FIG6 is similar to the unfolded view of FIG2 . The display device 100A of FIG2 and the display device 600 of FIG6 differ in the size (i.e., area) and position of the first test pad 124 and the second test pad 128 and the pattern of the insulating layer 210a of FIG6 . Specifically, in the display device 100A of FIG6 , the side 122s of the first contact pad 122 is aligned with the side 124s of the first test pad 124, and the side 126s of the second contact pad 126 is aligned with the side 128s of the second test pad 128. Similar to the insulating layer 210 in FIG. 2 , the insulating layer 210 a in FIG. 6 also covers the first test pad 124 and the second test pad 128 .

FIG. 7 is an expanded view of a display device 700 according to an embodiment of the present disclosure. Specifically, the display device 700 of FIG. 7 is composed of the repeated structure U of the display device 600 in FIG. 6 . In other words, the display device 700 includes a plurality of test structures 120 d. It should be noted that, due to the perspective and the simplification of the diagram, some components (such as the functional component 131) are not shown in FIG. 7 .

The display device 700 includes a plurality of test structures 120d, wherein a plurality of first test pads 124 and a plurality of second test pads 128 of the plurality of test structures 120d are disposed on the second surface 116 and adjacent to the second inclined surface S2 of the side surface 114. The plurality of test structures 120d are arranged along the direction Y on both sides of the second surface 116 of the display panel 110. In other embodiments, the test structures 120d may be disposed only at the four corners of the display panel 110. The plurality of test structures 120d may increase the number of samples of the resistance value to increase the numerical accuracy. For example, it is used to detect whether the deformation of the display panel 110 exceeds the specification.

FIG8 is a three-dimensional perspective view of a portion of a display device 800 according to an embodiment of the present disclosure. The display device 100 of FIG1A differs from the display device 800 of FIG8 in the side surface 114. Specifically, the side surface 114 of the display device 800 is substantially perpendicular to the first surface 112 and the second surface 116. As shown in FIG8, the first bridge circuit B6 of the test structure 120e is distributed on the second surface 116 and the side surface 114, and the first bridge circuit B6 is not distributed on the first surface 112. Similar to the display device 100 of FIG1A, the first bridge circuit B6 of the display device 800 is electrically connected to and covers the first contact pad 122 and the second contact pad 126.

1A, 3A, 4A, 5A and 8, in some embodiments, the third test pad 134 at least partially overlaps the corresponding fourth test pad 138 in the direction Z, and the third contact pad 132 at least partially overlaps the corresponding fourth contact pad 136 in the direction Z. In some embodiments, a plurality of the aforementioned display devices 100, 300, 400, 500, 600, 700, 800 form a spliced display, wherein the plurality of display devices are regularly arranged and connected to each other.

In summary, since the bridge circuit of the test structure disclosed in the present invention is far away from the electronic components in the display area, it is possible to avoid the electronic components in the surrounding area of the display device being damaged due to ESD, thereby improving the process yield.

The above summarizes the features of multiple implementations so that those skilled in the art can better understand the state of the disclosure. Those skilled in the art should understand that the disclosure can be easily used as a basis for designing or modifying other processes and structures to perform the same purpose and/or achieve the same advantages of the implementations described herein. Those skilled in the art should also recognize that such equivalent structures do not depart from the spirit and scope of the disclosure, and that various changes, substitutions, and modifications of the disclosure can be made without departing from the spirit and scope of the disclosure.

100, 100A: display device 110: display panel 112: first surface 114: side surface 116: second surface 120, 120a, 120b, 120c, 120d, 120e: test structure 122: first contact pad 122s: side 124: first test pad 124s: side 126: second contact pad 126s: side 128: second test pad 128s: side 130: drive structure 131: functional element 132: third contact pad 132s: side 134: third test pad 134s: side 135: pad 136: fourth contact pad 136s: side 138: fourth test pad 138s: side 139: flexible circuit board 210,210a: insulating layer 300,400,500,600,700,800: display device B1,B3,B4,B5,B6: first bridge line B2: second bridge line R1: display area R2: peripheral area S1: first slope S2: second slope PS: plane U: repeated structure X,Y,Z: direction

When read in conjunction with the accompanying drawings, the various aspects of the present disclosure can be best understood according to the following detailed description. It should be understood that various features are not drawn to scale in accordance with standard practices in the industry. In fact, the sizes of various features may be arbitrarily increased or decreased for clarity. FIG. 1A is a three-dimensional perspective view of a display device of a portion shown in accordance with one embodiment of the present disclosure. FIG. 1B is an expanded view of the display device of FIG. 1A. FIG. 2 is an expanded view of the display device of FIG. 1B in another embodiment. FIG. 3A is a three-dimensional perspective view of a display device of a portion shown in accordance with one embodiment of the present disclosure. FIG. 3B is an expanded view of the display device of FIG. 3A. FIG. 4A is a three-dimensional perspective view of a display device of a portion shown in accordance with one embodiment of the present disclosure. FIG. 4B is an unfolded view of the display device of FIG. 4A. FIG. 5A is a three-dimensional perspective view of a portion of the display device depicted according to one embodiment of the present disclosure. FIG. 5B is an unfolded view of the display device of FIG. 5A. FIG. 6 is an unfolded view of a portion of the display device depicted according to one embodiment of the present disclosure. FIG. 7 is an unfolded view of a portion of the display device depicted according to one embodiment of the present disclosure. FIG. 8 is a three-dimensional perspective view of a portion of the display device depicted according to one embodiment of the present disclosure.

Domestic storage information (please note in the order of storage institution, date, and number) None Foreign storage information (please note in the order of storage country, institution, date, and number) None

100: Display device

110: Display panel

112: First surface

114: Side surface

116: Second surface

120:Test structure

130: Driving structure

131: Functional components

132: Third contact pad

134: Third test pad

136: Fourth contact pad

138: Fourth test pad

B1: First bridge line

R1: Display area

R2: Peripheral area

S1: First slope

S2: Second slope

PS: plane

X,Y,Z: Direction

Claims (10)

A display device comprises: A display panel having a first surface and a second surface opposite to each other, a side surface disposed between the first surface and the second surface, and a display area disposed on the first surface; and A test structure comprising: A first contact pad disposed on the second surface; A first test pad disposed on the second surface and electrically connected to the first contact pad; A second contact pad disposed on the second surface; A second test pad disposed on the second surface and electrically connected to the second contact pad; and A first bridge circuit is disposed on the display panel and electrically connects the first contact pad and the second contact pad, wherein the first bridge circuit covers the first contact pad and the second contact pad, the first bridge circuit is distributed on the second surface and the side surface, and the first bridge circuit is not distributed on the first surface. A display device as described in claim 1, wherein the side surface includes a first inclined surface, a plane and a second inclined surface, the plane is arranged between the first inclined surface and the second inclined surface, the first inclined surface is arranged between the first surface and the plane, and the second inclined surface is arranged between the second surface and the plane. A display device as described in claim 2, wherein the first bridge line extends from the second surface to the second inclined surface. A display device as described in claim 2, wherein the first bridge line extends from the second surface through the second inclined surface to the plane. A display device as described in claim 2, wherein the first bridge line extends from the second surface through the second inclined surface and the plane to the first inclined surface. The display device as described in claim 2 further comprises: A plurality of the test structures, wherein the first test pads and the second test pads of the test structures are disposed on the second surface and adjacent to the second inclined surface. A display device as described in claim 1, wherein one side of the first contact pad is aligned with one side of the first test pad, and one side of the second contact pad is aligned with one side of the second test pad. The display device as described in claim 1 further comprises: An insulating layer, wherein the insulating layer covers a peripheral region disposed on the first surface, the side surface, the first contact pad, the first test pad, the second contact pad, and the second test pad. The display device as described in claim 1 further comprises: a third contact pad disposed in a peripheral region of the first surface, wherein the third contact pad is electrically connected to a pixel array; a fourth contact pad disposed on the second surface; and a second bridge circuit electrically connecting the third contact pad and the fourth contact pad, wherein the second bridge circuit extends from the first surface through the side surface and to the second surface. A spliced display, comprising: A plurality of display devices as shown in any one of claim items 1 to 9, wherein the display devices are regularly arranged and connected to each other.

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