TWI767785B - Display device and manufacturing method thereof - Google Patents

Abstract

A display device including a display panel, a plurality of first conductive patterns, a plurality of first sub-pads and a plurality of second sub-pads. The display panel has a first surface, a second surface, a third surface located between the first surface and the second surface, a display area and a periphery area located on the first surface, and includes a plurality of first main pads disposed on the periphery area and a plurality of second main pads disposed on the second surface, wherein the periphery area is closer to the third surface than the display area. Each first main pad at least partially overlaps the corresponding second main pad in the normal direction of the display panel, and the first main pads are arranged along a first direction. The first conductive patterns are respectively electrically connected to the corresponding first main pad and the corresponding second main pad. The first sub-pads are respectively adjacent and electrically connected to the corresponding first main pads, wherein in a second direction perpendicular to the first direction, the length of each first sub-pad is greater than that of each first main pad length. The second sub-pads are respectively adjacent to and electrically connected to the corresponding second main pads, wherein each of the first sub-pads at least partially overlap the corresponding second sub-pad in the normal direction of the display panel. Another method for manufacturing a display device is provided.

Description

Display device and method of manufacturing the same

The present invention relates to a device, and more particularly, to a display device and a method of manufacturing the same.

In response to the diversified applications of display devices, various manufacturing technologies and product designs are constantly being introduced. In order to provide more diverse applications, products with narrow or no borders have been proposed one after another. For example, in addition to providing larger functional areas (such as display areas, touch areas, etc.), products with narrow or no bezels can also be used in spliced products (such as splicing display panels).

The present invention provides a display device that can have a reduced frame width.

The present invention provides a manufacturing method of a display device, which can conveniently repair a failed circuit.

The display device of the present invention includes a display panel, a plurality of first conductive patterns, a plurality of first pads and a plurality of second pads. The display panel has an opposite first surface, a second surface, a third surface located between the first surface and the second surface, a display area and a peripheral area located on the first surface, and includes a A plurality of first main pads and a plurality of second main pads disposed on the second surface, wherein the peripheral area is closer to the third surface than the display area, and each first main pad is in the normal direction of the display panel The corresponding second main pads are at least partially overlapped and the first main pads are arranged along a first direction. The first conductive patterns are respectively electrically connected to the corresponding first main pads and the corresponding second main pads. The first primary pads are adjacent to each other and are electrically connected to the corresponding first primary pads, wherein in a second direction perpendicular to the first direction, the length of each primary pad is greater than that of each first primary pad length. The second secondary pads are respectively adjacent and electrically connected to the corresponding second main pads, wherein each of the first secondary pads at least partially overlaps the corresponding second secondary pads in the normal direction of the display panel.

The manufacturing method of the display device of the present invention includes providing a display panel, which has a first surface, a second surface, a third surface located between the first surface and the second surface, and a display panel located on the first surface. The display area and a peripheral area include a plurality of first main pads disposed on the peripheral area and a plurality of second main pads disposed on the second surface, wherein the peripheral area is closer to the third surface than the display area, each The first main pads at least partially overlap the corresponding second main pads in the normal direction of the display panel, and the first main pads are arranged along a first direction. A plurality of first primary pads are formed on the first surface, and some of the first secondary pads are respectively adjacent to and electrically connected to the corresponding first primary pads. In a second direction perpendicular to the first direction, The length of each first pad is greater than the length of each first main pad. A plurality of second sub-pads are formed on the second surface, and some of the second sub-pads are respectively adjacent to and electrically connected to the corresponding second main pads, wherein each of the first sub-pads is on the normal line of the display panel The direction at least partially overlaps the corresponding second pad. A plurality of first conductive patterns are formed on the display panel, and some of the first conductive patterns are respectively electrically connected to the corresponding first main pads and the corresponding second main pads. Detecting the resistance value between at least one of the first main pads and the corresponding second main pad as a basis for whether the corresponding first conductive pattern fails, wherein when the corresponding first conductive pattern fails, the display panel At least one second conductive pattern is formed thereon, and the at least one second conductive pattern is electrically connected to the first pad and the second pad corresponding to the failed first conductive pattern.

In an embodiment of the present invention, the length of each of the first primary pads in the first direction is greater than the length of each of the first secondary pads in the first direction.

In an embodiment of the present invention, at least one second conductive pattern is further included, which is electrically connected between the corresponding first pad and the corresponding second pad.

In an embodiment of the present invention, the material of the second conductive pattern is different from the material of the first conductive pattern

In an embodiment of the present invention, a protective layer is further included, covering some of the first main pads, some of the first sub-pads, some of the second main pads, some of the second sub-pads, some of the first conductive patterns and at least a second conductive pattern.

In an embodiment of the present invention, the above-mentioned at least one second conductive pattern covers the first secondary pad and the first primary pad on the first surface, and covers the second secondary pad and the second secondary pad on the second surface main pad.

In an embodiment of the present invention, the area of each first main pad is smaller than that of each second main pad, and the area of each first pad is smaller than that of each second pad.

In an embodiment of the present invention, each of the above-mentioned first secondary pads and each of the first main pads are connected by conductive lines, and each of the second secondary pads and each of the second main pads are connected by conductive lines line connection.

In an embodiment of the present invention, in the above-mentioned step of detecting the resistance value between at least one of the first main pads and the corresponding second main pad, by detecting the corresponding first pad and the second main pad Sub-pad to get the resistance value.

Based on the above, in the display device and the manufacturing method thereof of the present invention, the first secondary pads are respectively adjacent and electrically connected to the corresponding first main pads, and the second secondary pads are respectively adjacent and electrically connected to the corresponding first primary pads the second main pad. When the first conductive pattern between the first main pad and the second main pad fails, the newly added second conductive pattern is electrically connected to the first pad and the second pad corresponding to the failed first conductive pattern pads to repair the bad condition between the first main pad and the second main pad.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. The same reference numerals refer to the same elements throughout the specification. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may refer to the existence of other elements between the two elements.

Furthermore, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe one element's relationship to another element, as shown in the figures. It should be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" may include an orientation of "lower" and "upper", depending on the particular orientation of the figures. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "above" or "below" can encompass both an orientation of above and below.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation of the particular value as determined by one of ordinary skill in the art, considering the measurement in question and the A specified amount of measurement-related error (ie, a limitation of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about", "approximately" or "substantially" may be used to select a more acceptable range of deviation or standard deviation depending on optical properties, etching properties or other properties, and not one standard deviation may apply to all properties. .

Exemplary embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments. Thus, variations in the shape of the illustrations as a result of, for example, manufacturing techniques and/or (and/or) tolerances can be expected. Accordingly, the embodiments described herein should not be construed as limited to the particular shapes of regions as shown herein, but rather include deviations in shapes resulting from, for example, manufacturing. For example, regions illustrated or described as flat may typically have rough and/or nonlinear features. Additionally, the acute angles shown may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be construed as having meanings consistent with their meanings in the context of the related art and the present invention, and are not to be construed as idealized or excessive Formal meaning, unless expressly defined as such herein.

Generally speaking, in video wall display devices, seamless splicing has become a trend. The display device can use the side wiring design to extend the wires on the front of the display panel to the back of the display panel through the side of the display panel, so that the front of the display panel is electrically connected to the back of the display panel, and can be joined on the back of the display panel Chips, integrated circuits, or wirings, etc., can reduce the arrangement of components in the peripheral area of the front surface of the display panel, so as to reduce the area of the peripheral area on the front surface of the display panel, thereby increasing the screen ratio of the display device. The above-mentioned side wire design can be obtained by, for example, sputtering copper on the display panel, then covering the copper with an etching resist layer, and then etching. However, when the circuit is found to be defective, it cannot be repaired directly. The original anti-etching layer needs to be removed and then the conductive material is added to the original conductive pads of the display panel. The method of removing the etching resist layer is, for example, using a laser. However, since the side wires are a three-dimensional structure (eg U-shaped) distributed on the front, side and back of the display panel, the positioning and control of the laser is not easy. The present invention provides a display device and a manufacturing method thereof to solve the above problems.

The X direction, the Y direction, and the Z direction are marked in the drawing to show the arrangement relationship of the components in the drawing. The X direction, the Y direction, and the Z direction intersect with each other, but are not limited to be orthogonal to each other. 1A to 5 illustrate some steps of manufacturing a display device according to an embodiment of the present invention. It should be noted that FIGS. 1B and 3B are three-dimensional schematic diagrams of FIGS. 1A and 3A from another viewing angle, respectively, the cross-sectional structure of FIG. 2 may correspond to the line A-A of FIG. 1 , and the cross-sectional structure of FIG. Line B-B.

In FIG. 1A , the display panel 110 has a first surface 112 opposite to a second surface 116 , a third surface 114 located between the first surface 112 and the second surface 116 , and a display located on the first surface 112 Area A1 and a peripheral area E1 (the display area A1 and the peripheral area E1 are schematically distinguished by dotted lines). The peripheral area E1 is closer to the third surface 114 than the display area A1. The display panel 110 has a certain mechanical strength and can support objects, so that a plurality of film layers and/or a plurality of objects are arranged on the plate.

Here, the normal direction of the third surface 114 is different from the normal direction of the first surface 112 and is also different from the normal direction of the second surface 116 . In some embodiments, 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 respectively a plane parallel to the X direction-Y direction, and the third surface 114 is a plane parallel to the Y direction-Z direction. In other embodiments, the components disposed on the third surface 114 can be applied to other third surfaces, for example, the third surface parallel to the plane of the X direction-Z direction. In some embodiments, a pixel circuit structure (not shown in FIG. 1A ) that is electrically connected to the first main pad 120 may also be disposed on the first surface 112 of the display panel 110 .

In FIGS. 1A and 1B , a plurality of first main pads 120 are pre-formed in the peripheral region E1 of the first surface 112 . A plurality of second main pads 130 are pre-formed on the second surface 116 . The first main pads 120 and the second main pads 130 are arranged along the Y direction. In addition, the first main pads 120 and the second main pads 130 may be arranged on one side of the display panel 110 , or may be arranged on opposite sides of the display panel 110 . The first main pads 120 and the second main pads The number and configuration of the 130 may be determined according to actual requirements. As long as the first main pads 120 and the second main pads 130 correspond to each other, they are all within the scope of the present invention.

In FIG. 2 , the first main pads 120 at least partially overlap the corresponding second main pads 130 in the normal direction of the display panel 110 . For example, the first main pads 120 at least partially overlap the corresponding second main pads 130 in the Z direction.

Please continue to refer to FIGS. 1A and 1B , a plurality of primary pads 160 are formed on the first surface 112 , wherein the primary pads 160 are respectively adjacent and electrically connected to the corresponding first main pads 120 . A plurality of secondary pads 170 are formed on the second surface 116 , wherein the secondary pads 170 are respectively adjacent and electrically connected to the corresponding second main pads 130 .

Next, a plurality of first conductive patterns 140 are formed on the display panel 110 . The first conductive patterns 140 are disposed in the peripheral region E1 of the display panel 110 and can be arranged along the Y direction. Two ends of the first conductive pattern 140 are respectively connected to the corresponding first main pads 120 and the corresponding second main pads 130 . The first conductive pattern 140 can contact and directly cover the corresponding first main pad 120 and the corresponding second main pad 130 to electrically connect the corresponding first main pad 120 and the corresponding second main pad 130 .

In this embodiment, the first conductive pattern 140 may extend continuously from the first surface 112 to the third surface 114 and then to the second surface 116 . Here, the first conductive pattern 140 is a metal wire, which may be formed on the display panel 110 by edge sputtering, but the invention is not limited thereto. For example, the first conductive pattern 140 is formed on the display panel 110 by sputtering copper. Next, an etch-resistant layer is covered on the copper, and an etching process is performed to form the remaining etch-resistant layer 150 ( FIG. 2 ) to cover the corresponding first conductive patterns 140 . Such an approach can stably control the resistance value between the corresponding first main pad 120 and the corresponding second main pad 130 . It should be noted that the illustration of the anti-etching layer 150 in FIG. 2 is omitted in the subsequent illustrations.

In some embodiments, the first conductive pattern 140 may be electrically connected to the pixel circuit structure disposed on the display panel 110 . The first main pad 120 is disposed on the first surface 112 of the display panel 110 and is used for providing an electrical transmission channel to electrically connect the pixel circuit structure (not shown) on the display panel 110 to the second main pad 130 and Electrically connected to other components located on the second surface 116, such as driver chips, integrated circuits, or traces. During the process of fabricating the first main pads 120 on the first surface 112 of the display panel 110 , the pixel circuit structure may be fabricated on the first surface 112 at the same time. The so-called pixel circuit structure may include active elements, capacitors, signal lines, and the like. Meanwhile, the first main pad 120 can be connected to a signal line in the pixel circuit structure for transmitting electrical signals to the pixel circuit structure. In some embodiments, the display device 100 further includes functional elements disposed on the first surface 112 to provide required functions. For example, the functional elements may include display elements and the like. The pixel circuit structure can be used to drive functional elements to enable the display device 100 to provide display functions and the like.

Under the above configuration, the display device 100 shown in FIG. 2 is obtained. In some embodiments, upper and lower probes are used to monitor the electrical properties of the side conductors. Since the secondary pads are electrically connected to the corresponding main pads, the upper and lower probes can test the distance between the corresponding two main pads by touching the corresponding pads on the upper surface and the lower surface of the display panel twice. resistance value, the present invention is not limited to this.

The resistance value between at least one of the first main pads 120 and the corresponding second main pad 130 is detected as a basis for whether the corresponding first conductive pattern 140 fails. When it is detected that at least one of the first main pads 120 and the corresponding second main pad 130 are disconnected or the resistance value is too high or abnormal, it is determined as a failure. In the step of detecting the resistance value between at least one of the first main pads 120 and the corresponding second main pad 130, the above-mentioned resistance. Referring to FIGS. 3A and 3B , when it is determined that the corresponding first conductive pattern 140 fails, at least one second conductive pattern 180 is formed on the display panel 110 . The second conductive pattern 180 is electrically connected to the first pad 160 and the second pad 170 corresponding to the failed first conductive pattern 140 to obtain the repaired display device 100'. It should be noted that in FIG. 3A and FIG. 3B , only one second conductive pattern 180 is schematically shown, but in fact, the number of the second conductive patterns 180 may be determined according to the number of the failed first conductive patterns 140 . Inventions are not limited to this.

Referring to FIG. 4 , in this embodiment, each of the first pads 160 at least partially overlaps the corresponding second pads 170 in the normal direction of the display panel 110 . For example, each first pad 160 at least partially overlaps with the corresponding second pad 170 in the Z direction. In this embodiment, the second conductive pattern 180 covers a part of the first contact pad 160 and a part of the second contact pad 170 .

That is to say, the defect between the first main pad 120 and the second main pad 130 can be repaired by adding the second conductive pattern 180 . In this way, the process of removing the etching resist layer 150 on the failed first conductive pattern 140 can be omitted, so as to achieve the effect of shortening the time course and improving the process yield.

In FIG. 5 , a protective layer 190 may be formed on the edge of the display panel 110 . The protective layer 190 covers the plurality of first main pads 120 , the plurality of second main pads 130 , the plurality of first conductive patterns 140 , the plurality of first sub-pads 160 , the plurality of second sub-pads 170 and the second The conductive pattern 180 can achieve protection effects such as insulation.

In this embodiment, the material of the second conductive pattern 180 is different from the material of the first conductive pattern 140 . For example, the second conductive pattern 180 can be fabricated on the display panel 110 by a transfer method. The second conductive pattern 180 is, for example, silver paste. In some manufacturing processes, the second conductive pattern 180 may be coated or applied on the printing tool first, and then the printing tool is used to align and press the third surface 114 of the display panel 110, so that the second conductive pattern on the printing tool The pattern 180 is attached to the third surface 114 of the display panel 110 . In addition, the printing tool can be made of elastic material, such as rubber. Therefore, when the printing tool is aligned and pressed against the third surface 114 of the display panel 110 , the edge end is lightly pressed so that the second conductive pattern 180 on the printing tool is attached to the first surface 112 and the second surface 116 of the display panel 110 . edge. For example, during the printing process, the printing tool can move toward the display panel 110 along the X direction to transfer the second conductive pattern 180 to the first surface 112 , the second surface 116 and the third surface 114 . In other embodiments, the second conductive pattern 180 may also be attached to a proper position on the display panel 110 by spraying or other appropriate methods, which is not limited to the above.

FIG. 6A is a schematic top view of the display device of FIG. 3A . FIG. 6B is a schematic bottom view of the display device of FIG. 3B . Referring to FIG. 6A , in this embodiment, the first secondary pads 160 and the first main pads 120 are connected by conductive lines W1 . Referring to FIG. 6B , in this embodiment, the second secondary pads 170 and the second main pads 130 are connected by conductive lines W2 . In this embodiment, the conductive lines W1 and W2 are straight lines, but in other embodiments, the conductive lines W1 and W2 may also be inflection lines, which are not limited thereto. In other embodiments, each of the first pads 160 and each of the first main pads 120 may also be directly connected, and each of the second pads 170 and each of the second main pads 130 may also be directly connected connection, the present invention is not limited to this.

Referring to FIG. 6A , the length L1 of the first main pad 120 in the first direction is greater than the length L2 of the first secondary pad 160 in the first direction. In a second direction perpendicular to the first direction, the length L4 of the first secondary pad 160 is greater than the length L3 of the first primary pad 120 . Here, the first direction is, for example, the Y direction, and the second direction is, for example, the X direction. Accordingly, the upper probe can contact where the position 1601 of FIG. 6A refers. Similarly, the lower probe can also touch the position indicated by the position 1701 in FIG. 6B to measure the resistance value between the first main pad 120 and the second main pad 130 . Specifically, the position 1601 in FIG. 6A is the part where the second conductive pattern 180 exposes the first contact pad 160 , and the position 1701 in FIG. 6B is the part where the second conductive pattern 180 exposes the second contact pad 170 . The area of the position 1601 in FIG. 6A and the position 1701 in FIG. 6B is large, which is convenient for detection. In other embodiments, the area ranges of the position 1601 and the position 1701 may be determined according to actual process requirements, but not limited thereto.

In addition, in this embodiment, considering that the first surface 112 has the display area A1, the area of each first main pad 120 on the first surface 112 is smaller than the area of each second main pad 130 on the second surface 116, the first The area of each of the first pads 160 on the surface 112 is smaller than the area of each of the second pads 170 on the second surface 116 . In other words, since the second surface 116 is not limited by the display area A1, the areas of the second main pads 130 and the second sub-pads 170 can be designed to be larger to facilitate probe contact, but the invention is not limited thereto.

7A and 7B are schematic top and bottom views of a display device according to another embodiment of the present invention, respectively. Referring to FIGS. 7A and 7B , in this embodiment, the display device 100B is slightly different from the display device 100' of FIGS. 6A and 6B , and the difference lies in the coverage of the second conductive pattern 180B.

In this embodiment, the second conductive pattern 180B covers the first secondary pad 160 and the first main pad 120 on the first surface 112 , and the second conductive pattern 180B covers the second secondary pad on the second surface 116 170 and the second main pad 130, but the invention is not limited to this. In this embodiment, the second conductive pattern 180B covers the conductive lines W1 and W2, but in other embodiments, one end of the second conductive pattern 180B can be used to electrically connect the first secondary pad 160 and the first main pad 120, the other end is electrically connected to the second pad 170 and the second main pad 130, and the conductive lines W1 and W2 are omitted.

8A and 8B are three-dimensional schematic diagrams of a display device at different viewing angles according to another embodiment of the present invention. FIG. 9 is a schematic perspective view of the display device and the protective layer of FIG. 8A . Referring to FIGS. 8A and 8B , in this embodiment, the display device 100C is slightly different from the display device 100 ′ of FIGS. 6A and 6B . The difference is that a plurality of second conductive patterns 180C are formed on the display panel 110 , respectively. It is electrically connected between the plurality of first-time pads 160 and the plurality of second-time pads 170 . In other words, a second conductive pattern 180C is newly added between each of the first contact pads 160 and the corresponding second contact pads 170 . The advantage of this is that the alignment time can be saved, and multiple lines can be repaired at the same time, which can increase the stability of the resistance value. Referring to FIG. 9 , finally, a protective layer 190C may be formed on the edge of the display panel 110 to achieve protective effects such as insulation.

To sum up, in the display device and the manufacturing method thereof of the present invention, the first secondary pads are respectively adjacent and electrically connected to the corresponding first main pads, and the second secondary pads are respectively adjacent and electrically connected to the corresponding second main pad. When the first conductive pattern between the first main pad and the second main pad fails, the newly added second conductive pattern is electrically connected to the first pad and the second pad corresponding to the failed first conductive pattern The pad is used to repair the bad condition between the first main pad and the second main pad, so as to achieve the effect of shortening the time process and improving the process yield. In another embodiment, even if the first conductive pattern between one of the plurality of first main pads and the corresponding second main pad has not yet failed, the second conductive pattern is added to the corresponding first connection Between the pad and the corresponding second pad, the alignment time can be saved, and multiple wires can be repaired at the same time, which can further increase the stability of the resistance value.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

100, 100', 100B, 100C: Display device 110: Display panel 112: First Surface 114: Third Surface 116: Second Surface 120: The first main pad 130: Second main pad 140: the first conductive pattern 150: Anti-etching layer 160: The first pad 1601: Location 170: Second Pad 1701: Location 180, 180B, 180C: the second conductive pattern 190, 190C: protective layer A1: Display area E1: Surrounding area A-A, B-B: line L1, L2, L3, L4: length W1, W2: Conductive lines X, Y, Z: direction

1A to 5 illustrate some steps of manufacturing a display device according to an embodiment of the present invention. FIG. 6A is a schematic top view of the display device of FIG. 3A . FIG. 6B is a schematic bottom view of the display device of FIG. 3B . 7A and 7B are schematic top and bottom views of a display device according to another embodiment of the present invention, respectively. 8A and 8B are three-dimensional schematic diagrams of a display device at different viewing angles according to another embodiment of the present invention. FIG. 9 is a schematic perspective view of the display device and the protective layer of FIG. 8A .

100’: Display unit

110: Display panel

112: First Surface

114: Third Surface

116: Second Surface

120: The first main pad

140: the first conductive pattern

160: The first pad

180: Second conductive pattern

A1: Display area

E1: Surrounding area

B-B: Line

W1: Conductive line

X, Y, Z: direction

Claims (10)

A display device, comprising: a display panel with a first surface opposite, a second surface, a third surface located between the first surface and the second surface, and a display area located on the first surface and a peripheral area, including a plurality of first main pads disposed on the peripheral area and a plurality of second main pads disposed on the second surface, wherein the peripheral area is closer to the third than the display area surface, each of the first main pads at least partially overlaps the corresponding second main pad in the normal direction of the display panel, and the first main pads are arranged along a first direction; a plurality of first conductive patterns , which are respectively electrically connected to the corresponding first main pad and the corresponding second main pad; a plurality of first secondary pads are respectively adjacent and electrically connected to the corresponding first main pad, wherein In a second direction perpendicular to the first direction, the length of each of the first primary pads is greater than the length of each of the first main pads; and a plurality of second secondary pads are respectively adjacent and electrically connected and the corresponding second main pads, wherein each of the first secondary pads at least partially overlap with the corresponding second secondary pads in the normal direction of the display panel. The display device of claim 1, wherein the length of each of the first main pads in the first direction is greater than the length of each of the first secondary pads in the first direction. The display device according to claim 1, further comprising at least one second conductive pattern electrically connected between the corresponding first pad and the corresponding second pad. The display device of claim 3, wherein the material of the second conductive pattern is different from the material of the first conductive pattern. The display device of claim 3, further comprising a protective layer covering the first main pads, the first secondary pads, the second main pads, the second secondary pads, the some first conductive patterns and the at least one second conductive pattern. The display device of claim 3, wherein the at least one second conductive pattern covers the first secondary pad and the first main pad on the first surface, and covers the second conductive pattern on the second surface a secondary pad and the second primary pad. The display device of claim 1, wherein the area of each of the first main pads is smaller than that of each of the second main pads, and the area of each of the first pads is smaller than the area of each of the second pads . The display device according to claim 1, wherein each of the first pads and each of the first main pads are connected by conductive lines, and each of the second pads and each of the second main pads are connected by a conductive circuit. connected by conductive lines. A method for manufacturing a display device, comprising: providing a display panel with a first surface opposite, a second surface, a third surface located between the first surface and the second surface, and a surface located on the first surface a display area and a peripheral area of the Compared with the display area, which is closer to the third surface, each of the first main pads at least partially overlaps the corresponding second main pad in the normal direction of the display panel, and the first main pads are along a Arranged in the first direction; a plurality of first secondary pads are formed on the first surface, wherein the first secondary pads are respectively adjacent and electrically connected to the corresponding first main pads, and are perpendicular to the first primary pads. In a second direction in one direction, the length of each of the first primary pads is greater than the length of each of the first main pads; a plurality of secondary pads are formed on the second surface, wherein some of the secondary pads are The pads are respectively adjacent and electrically connected to the corresponding second main pads, wherein each of the first secondary pads at least partially overlaps the corresponding second secondary pads in the normal direction of the display panel; A plurality of first conductive patterns are formed on the display panel, wherein the first conductive patterns are respectively electrically connected to the corresponding first main pads and the corresponding second main pads; and detecting the first main pads The resistance value between at least one of the pads and the corresponding second main pad is used as the basis for whether the corresponding first conductive pattern fails, wherein when the corresponding first conductive pattern fails, the corresponding first conductive pattern is formed on the display panel. At least one second conductive pattern, and the at least one second conductive pattern is electrically connected to the first pad and the second pad corresponding to the failed first conductive pattern. The manufacturing method of a display device as claimed in claim 9, wherein the detection of the contact between at least one of the first main pads and the corresponding second main pad In the step of resistance value, the resistance value is obtained by detecting the corresponding first pad and the second pad.

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