Display device

Abstract

The present invention discloses a display device, which includes: a substrate including a display area for displaying an image and a peripheral area adjacent to the display area; a plurality of signal lines formed in the display area; pads formed in the peripheral area; and a plurality of connection conductors for connecting the signal lines and the pads, wherein a first connection conductor among the plurality of connection conductors and a second connection conductor adjacent to the first connection conductor are disposed on different layers, and the first connection conductor and the second connection conductor are disposed in the peripheral area and are formed to extend from the pad and bend at least twice, with at least one bend being in the reverse direction.

Description

[0001] This application is a divisional application of the invention patent application with the application date of September 14, 2016, application number 201610825939.0, and title "Display Device". Technical Field

[0002] The present invention relates to a display device. Background Art

[0003] Currently known display devices include: liquid crystal displays (LCDs), plasma display panels (PDPs), organic light-emitting diode (OLED) devices, field emission displays (FEDs), and electrophoretic display devices.

[0004] In particular, the OLED device among the above-mentioned known display devices includes two electrodes and an organic emission layer disposed between the two electrodes; electrons injected from one electrode and holes injected from the other electrode combine with each other in the organic emission layer to generate excitons; and the excitons release energy, thereby emitting light.

[0005] Unlike LCDs, since OLED devices have a self-luminous characteristic and do not require a separate light source, their thickness and weight can be reduced. In addition, due to the excellent characteristics of OLED devices, such as low power consumption, high brightness, and high response speed, OLED devices have received attention as the next-generation display devices.

[0006] In order to drive the organic light-emitting elements of the organic light-emitting device, a fan-out unit for connecting a gate line (or data line) and a gate IC (or data IC) is formed in the peripheral area of the substrate. However, the connection wires formed on the fan-out unit may have different lengths, resulting in different resistances, thereby delaying the signals transmitted through the connection wires. Summary of the Invention

[0007] The present invention aims to provide a display device for minimizing the length difference of the connection wires of the fan-out unit.

[0008] According to an exemplary embodiment of the present invention, there is provided a display device including: a substrate including a display area for displaying an image and a peripheral area adjacent to the display area; a plurality of signal lines formed in the display area; pads formed in the peripheral area; and a plurality of connection wires for connecting the signal lines and the pads, wherein a first connection wire and a second connection wire adjacent to the first connection wire among the plurality of connection wires are disposed on different layers, and the first connection wire and the second connection wire are disposed in the peripheral area in a shape such that they extend from the pad to the display area and bend at least twice, wherein at least one of the bends is in the reverse direction.

[0009] The first connection wire and the second connection wire may be disposed separately from each other at a predetermined interval.

[0010] Each of the first connection wire and the second connection wire may include: a first connector connected to a pad and a second connector connected to a signal line; and an extension portion connected between the first connector and the second connector, the extension portion including: a plurality of first bridges arranged parallel to the first connector and a plurality of second bridges at a predetermined angle to the first bridges, and the first bridges and the second bridges being alternately connected.

[0011] Adjacent first bridges and second bridges may be perpendicular to each other.

[0012] The first bridges may be arranged parallel to each other.

[0013] Adjacent first bridges among the first bridges may be formed to have the same length.

[0014] The second bridges may be arranged parallel to each other.

[0015] The second bridges may be formed to have different lengths.

[0016] The second bridges may be formed to have the same length.

[0017] The first bridges may be longer than the second bridges.

[0018] The second connector may be bendable.

[0019] The extension portion of the first connection wire and the extension portion of the second connection wire adjacent to the first connection wire may be formed to be identical to each other when one of the extension portions is rotated 180 degrees.

[0020] Adjacent sides of the first connection wire and the second connection wire may overlap each other.

[0021] The pad may include: a plurality of connection pad terminals connected to the connection wire and a plurality of empty pad terminals not connected to the connection wire.

[0022] The first connection wire and the second connection wire may be connected to the connection pad terminals.

[0023] The display device may further include: a flexible film connected to the pad and including a first surface on which a first driving chip is provided.

[0024] The display device may further include a second driving chip formed in an outer peripheral region and connected to the pad.

[0025] An insulating layer may be provided between the first connection wire and the second connection wire.

[0026] The signal lines among the signal lines connected to the first connection wire and the second connection wire may be formed on different layers.

[0027] The connection wire may be formed into two layers, three layers or four layers.

[0028] The signal line may be a gate line.

[0029] The signal line may be a data line.

[0030] In an exemplary embodiment of the present invention, a display device is provided, including: a substrate having a display panel and pads; a plurality of signal lines formed in the display panel; a plurality of connection pad terminals formed in the pads; and a plurality of connection wires formed on the substrate for connecting the signal lines and the connection pad terminals, wherein a first connection wire among the plurality of connection wires and a second connection wire adjacent to the first connection wire are disposed on different layers and separated from each other at a predetermined interval, and the first connection wire and the second connection wire have the same length, are formed to extend from the pad to the display panel and bend at least twice, wherein at least one bend is in the reverse direction.

[0031] In the display device according to an exemplary embodiment of the present invention, the transmission of signals is prevented from being delayed by allowing the connection wires of the fan-out unit to have the same length.

[0032] In addition, adjacent connection wires are disposed on different layers to minimize the interval among the connection wires, thereby increasing the integration degree of the connection wires.

[0033] Furthermore, adjacent connection wires are disposed on different layers to prevent the connection wires from being short-circuited by external particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Exemplary embodiments of the inventive concept can be well understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, and in which:

[0035] Figure 1 A partial top plan view of a display device including connection wires according to a first exemplary embodiment of the inventive concept is shown;

[0036] Figure 2 Shows an exemplary embodiment of the inventive concept Figure 1 of the display area;

[0037] Figure 3 Shows an exemplary embodiment of the inventive concept regarding Figure 2 a cross-sectional view taken along line III-III;

[0038] Figure 4 Shows an enlarged view of the connection wires in area A in Figure 1 a first exemplary embodiment of the inventive concept;

[0039] Figure 5 Shows an exemplary embodiment of the inventive conceptFigure 4 the first connecting wire and the second connecting wire;

[0040] Figure 6 shows a cross-sectional view taken along line VI-VI of an exemplary embodiment according to the inventive concept with respect to Figure 4 ;

[0041] Figure 7 shows an exemplary variation of the connecting wire of a first exemplary embodiment according to the inventive concept;

[0042] Figure 8 shows a cross-sectional view taken along line VIII-VIII of an exemplary embodiment according to the inventive concept with respect to Figure 7 ;

[0043] Figure 9 shows an exemplary variation of the driving chip of an exemplary embodiment according to the inventive concept Figure 1 ;

[0044] Figure 10 shows an enlarged view of the connecting wire of a second exemplary embodiment according to the inventive concept;

[0045] Figure 11 shows the first connecting wire and the second connecting wire of an exemplary embodiment according to the inventive concept Figure 10 ;

[0046] Figure 12 shows a cross-sectional view taken along line XII-XII of an exemplary embodiment according to the inventive concept with respect to Figure 10 ; and

[0047] Figure 13 shows a comparison of the connecting wires configured with a single layer and a double layer in an exemplary embodiment according to the inventive concept.

[0048] Since the drawings in Figures 1 - 13 are exemplary, the elements in the drawings are not necessarily drawn to scale. For example, some elements may be enlarged or exaggerated for clarity. Detailed Description

[0049] In the following detailed description, certain exemplary embodiments of the inventive concept are shown and described only by way of illustration. As those skilled in the art will recognize, the described exemplary embodiments can be modified in various different ways without departing from the spirit or scope. The drawings and the description are to be regarded as exemplary in nature, and not restrictive. Throughout the specification, like reference numerals refer to like elements.

[0050] For better understanding and for the sake of description, the dimensions and thicknesses of each component illustrated in the drawings are illustrated arbitrarily in the drawings, and the present invention is not limited to the illustration.

[0051] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present. Further, throughout the specification, unless there is a specific contrary description, the word “comprising” and its variations such as “comprises” or “comprising” will be understood to mean including the stated element but not excluding any other element. It is understood that the terms “on” and like terms are commonly used and do not necessarily refer to a gravity reference.

[0052] Reference will now be made to Figures 1 to 6 a display device including connection wires according to a first exemplary embodiment of the inventive concept.

[0053] Figure 1 A partial top plan view of a display device including connection wires according to a first exemplary embodiment of the inventive concept is shown, Figure 2 showing Figure 1 a display area, and Figure 3 showing a cross-sectional view taken along line III-III with respect to Figure 2 the same.

[0054] Referring to Figures 1 to 3 , the display device includes: a substrate SUB, a display panel 100, pads P, a flexible film 400, and a plurality of connection wires 300.

[0055] Among the plurality of connection wires 300 for connecting the display panel 100 and the pads P, a first connection wire 311 and a second connection wire 312 adjacent to each other are formed on different layers, separated from each other at a predetermined interval, and arranged to be parallel to each other. Figure 4 A magnified view of the connection wires in region A in Figure 1 is shown. As Figure 4 shown, the first connection wire 311 and the second connection wire 312 include portions extending from the pads P to the display panel 100 in a second direction, where the connection wires extend straight toward the display panel 100, bend to extend back toward the pads P, and then bend to extend to the display panel 100. The X-axis represents a first direction, and the Y-axis represents a second direction. The first connection wire 311 and the second connection wire 312 bend at least twice, and the wires bend at least once toward the reverse.

[0056] Referring to Figure 1, the substrate SUB is divided into a display area DA for displaying an image and a peripheral area PA adjacent to the display area DA. A display panel 100 for emitting light can be provided in the display area DA. A plurality of connection wires 300, pads P, and a flexible film 400 for driving the display panel 100 can be provided in the peripheral area PA. The above components provided on the substrate SUB will be further described.

[0057] Reference Figure 2 and Figure 3 , the display panel 100 formed in the display area DA of the substrate SUB includes: a first gate wire GW1, a second gate wire GW2, a data wire DW, a display unit 140, and a pixel 150.

[0058] In response to a control signal supplied by an external control circuit (such as a timing controller), the gate driver 210 sequentially supplies a scan signal to a first scan line SC2 - SC2n or a second scan line SC1 - SC2n - 1 included in the first gate wire GW1 or the second gate wire GW2. The pixel 150 is selected by the scan signal and sequentially receives a data signal. Figure 2 The illustrated gate driver 210 is formed in the first driving chip 200 on the flexible film 400 and is shown for ease of description in Figure 2 shown.

[0059] As Figure 3 shown, the first gate wire GW1 is provided on the substrate SUB and extends in a first direction, and a first insulating layer IL1 is interposed between the first gate wire GW1 and the substrate SUB. The first gate wire GW1 includes a second scan line SC2n - 1 and an emission control line E1 - En. The second scan line SC2n - 1 is connected to the gate driver 210 and receives a scan signal from the gate driver 210. The emission control line En is connected to the emission control driver 220 and receives an emission control signal from the emission control driver 220. In a manner similar to the gate driver 210, Figure 2 the illustrated emission control driver 220 is formed in the first driving chip 200 on the flexible film 400 and is shown for ease of description in Figure 2 shown.

[0060] The second gate wire GW2 is provided on the first gate wire GW1 and extends in the first direction, and a second insulating layer IL2 is interposed between the second gate wire GW2 and the first gate wire GW1. The second gate wire GW2 includes a first scan line SC2n and an initialization power line Vinit. The first gate wire GW1 and the second gate wire GW2 do not overlap.

[0061] The first scan line SC2n is connected to the gate driver 210 and receives a scan signal from the gate driver 210. The initialization power line Vinit is connected to the gate driver 210 and receives initialization power from the gate driver 210.

[0062] In an exemplary embodiment of the inventive concept, the initialization power line Vinit receives initialization power from the gate driver 210, and it may be connected to another additional component and may receive initialization power from the additional component.

[0063] Corresponding to a control signal provided by an external component such as a timing controller, the emission control driver 220 sequentially provides an emission control signal to the emission control line En. The pixel 150 is under the emission control of the emission control signal. That is, the emission control signal controls the emission time of the pixel 150. Depending on the configuration of the pixel 150, the emission control driver 220 may be omitted.

[0064] Corresponding to a control signal supplied by an external component such as a timing controller, the data driver 230 supplies a data signal to the data line DAm among the data wires DW. Whenever a scan signal is supplied to the first scan line SC2n or the second scan line SC2n-1, the data signal supplied to the data line DAm is supplied to the pixel 150 selected by the scan signal. The pixel 150 is charged with a voltage corresponding to the data signal and emits light of a corresponding brightness. In a manner similar to the gate driver 210, Figure 2 the illustrated data driver 230 is formed in the first driving chip 200 on the flexible film 400 and is shown for ease of description in Figure 2 the figure.

[0065] The data wire DW is provided on the second gate wire GW2 and extends in a second direction intersecting the first direction, and a third insulating layer ILD is interposed between the data wire DW and the second gate wire GW2. The data wire DW includes: data lines DA1-DAm and a driving power line ELVDDL. The data line DAm is connected to the data driver 230 and receives a data signal from the data driver 230. The driving power line ELVDDL is connected to the first power supply ELVDD and receives driving power from the first power supply ELVDD.

[0066] The driving power line ELVDDL and the data line DAm may be formed on the same layer on the third insulating layer ILD. The driving power line ELVDDL and the data line DAm may also be formed on different layers. For example, the driving power line ELVDDL may be formed on the same layer as the first gate wire GW1, while the data line DAm may be formed on the same layer as the second gate wire GW2. Conversely, the driving power line ELVDDL may be formed on the same layer as the second gate wire GW2, and the data line DAm may be formed on the same layer as the first gate wire GW1, and the display unit 140 includes: a plurality of pixels 150 provided in the intersection region of the first gate wire GW1, the second gate wire GW2, and the data wire DW. The pixel 150 includes: an organic light-emitting element for emitting light having a luminance corresponding to a driving current corresponding to a data signal; and a pixel circuit for controlling the driving current flowing to the organic light-emitting element. The pixel circuit is connected to the first gate wire GW1, the second gate wire GW2, and the data wire DW, and the organic light-emitting element is connected to the pixel circuit. The pixel 150 is not limited to including an organic light-emitting element. For example, it may include a liquid crystal display element or an electrophoretic display element.

[0067] The organic light-emitting element of the display unit 140 is connected to an external first power supply ELVDD and a second power supply ELVSS, and the pixel circuit is interposed between the display unit 140 and the external first power supply ELVDD. The first power supply ELVDD and the second power supply ELVSS supply driving power and common power to the pixels 150 of the display unit 140, respectively, and the pixel 150 responds to the data signal by emitting light according to the driving power and the common power provided to the pixel 150, and the light has a luminance corresponding to the driving current passing through the organic light-emitting element from the first power supply ELVDD.

[0068] According to an exemplary embodiment of the inventive concept, the gate wires cross the pixels 150 in a first direction and do not overlap each other. That is, the first gate wire GW1 including the second scan line SC2n-1 and the emission control line En and the second gate wire GW2 including the first scan line SC2n and the initialization power supply line Vinit are not provided on the same layer, but the first gate wire GW1 and the second gate wire GW2 of the gate wires are provided on different layers and the second insulating layer GI2 is interposed between the first gate wire GW1 and the second gate wire GW2, so that a narrow distance W can be formed between adjacent gate wires provided on different layers, and thus more pixels 150 can be formed in the same area. Therefore, a high-resolution display device can be formed.

[0069] Reference Figure 1 and Figure 2, a plurality of connection wires 300 connect a plurality of signal lines to pads P, and the plurality of signal lines include data lines DAm and scan lines SCn of the display panel 100. Here, the connection wires 300 correspond to fan-out units in the display device and are used to connect gate lines or data lines to gate ICs or data ICs.

[0070] According to a first exemplary embodiment of the inventive concept, a part of the plurality of connection wires 300 includes a part extending from the pad P in a second direction to the display panel 100, where these connection wires extend forward to the display panel 100, bend to extend back toward the pad P, and then bend and extend to the display panel 100 so as to increase the resistance of the connection wires. The plurality of connection wires 300 bend at least twice, and these wires bend toward the reverse direction at least once. For example, the connection wire may include a part formed by rotating the letter S by 90 degrees.

[0071] As Figure 1 shown, the plurality of connection wires 300 connected to the display panel 100 are divided and connected to connection pad terminals P1 and connection pad terminals P3 in two regions. That is, some connection wires are connected to the connection pad terminals P1, while the remaining connection wires are connected to the connection pad terminals P3. An empty pad terminal P2 may be provided between the connection pad terminals P1 and the connection pad terminals P3. That is, no connection wire is connected to the empty pad terminal P2.

[0072] An area through which a portable terminal such as a camera module for a smart phone or a tablet passes may be provided in the area through which the connection wires 300 pass. That is, the camera module may pass through Figure 1 hole H. In this way, the connection wires are not connected to the empty pad terminal P2. Therefore, holes are provided between adjacent connection wires 311 and connection wire 313, so that the lengths of the connection wires 311 and the connection wire 313 become different. When signals are transmitted through the connection wires 311 and the connection wire 313, the resistance values are different from each other, so the signals may not reach the display panel 100 at the same time.

[0073] In a first exemplary embodiment of the inventive concept, to solve the above problem and for the purpose of increasing the resistance of short connection wires, a part of the plurality of connection wires 300 includes a part extending from the pad P in a second direction to the display panel 100, where the connection wires 300 extend forward to the display panel 100, bend to extend back toward the pad P, and then bend and extend to the display panel 100. The connection wires 300 bend at least twice, and these wires bend toward the reverse direction at least once.

[0074] Specifically, among the multiple connection wires 300, the adjacent first connection wire 311 and second connection wire 312 respectively include first connectors 311a and 312a, second connectors 311b and 312b, and extension portions 311c and 312c. Refer to Figure 5 , the first connection wire 311 includes a first connector 311a, a second connector 311b, and an extension portion 311c.

[0075] The first connector 311a is connected to the pad P. The first connector 311a extends and is formed in the second direction. That is, the first connector 311a is formed to extend from the pad P to the display panel 100. As Figure 1 and Figure 5 shown, the first connector 311a can be formed linearly in the second direction.

[0076] The second connector 311b is connected to the display panel 100 and is connected to the first connector 311a through the extension portion 311c. The second connector 311b is formed to be bent and then connected to the signal line of the display panel 100.

[0077] The extension portion 311c is connected between the first connector 311a and the second connector 311b to increase the resistance of the first connection wire 311. The extension portion 311c increases the length of the connection wire to increase the resistance of the wire. Here, the extension portion 311c corresponds to the portion formed by rotating the letter S by 90 degrees.

[0078] Specifically, the extension portion 311c includes multiple first bridges 311c-1, 311c-3, and 311c-5 and multiple second bridges 311c-2 and 311c-4. The first bridges 311c-1, 311c-3, and 311c-5 are arranged parallel to the first connector 311a, while the second bridges 311c-2 and 311c-4 are arranged perpendicular to the first bridges 311c-1, 311c-3, and 311c-5. The multiple second bridges can form a predetermined angle with the first bridges, where the predetermined angle is 90 degrees or not 90 degrees. For example, one first bridge can form an angle less than 90 degrees with one second bridge, and then this second bridge can form an angle greater than 90 degrees with the next first bridge.

[0079] The first bridges 311c-1, 311c-3, and 311c-5 and the second bridges 311c-2 and 311c-4 are alternately connected to each other. When the first bridges 311c-1, 311c-3, and 311c-5 and the second bridges 311c-2 and 311c-4 are alternately connected, as Figure 5As shown, the extension portion 311c can be arranged in a manner similar to rotating the letter 'S' by 90 degrees. That is, the first bridge 311c-1, the second bridge 311c-2, the first bridge 311c-3, the second bridge 311c-4, and the first bridge 311c-5 are arranged in sequence so that they can be arranged according to the above-mentioned shape.

[0080] The first bridge 311c-1 is connected to the first connector 311a and is arranged along the same direction as the first connector 311a. In this way, the first connection wire 311 extends from the pad P to the display panel 100, and a portion that goes in the reverse direction is formed in the extension portion 311c. Here, the reverse portion represents the portion on the first connection wire 311 that extends from the pad P to the display panel 100 in the second direction, where the first connection wire 311 extends forward to the display panel 100, bends in the reverse portion and extends back towards the pad P, and then bends and extends to the display panel 100. The first connection wire 311 bends at least twice, and the wire bends in the reverse direction at least once.

[0081] The first bridges 311c-1, 311c-3, and 311c-5 are arranged parallel to each other. That is, the first bridges 311c-1, 311c-3, and 311c-5 are arranged parallel to the first connector 311a. The adjacent first bridges 311c-3 and 311c-5 can be formed to have the same length.

[0082] The second bridges 311c-2 and 311c-4 are arranged parallel to each other. That is, the second bridges 311c-2 and 311c-4 are arranged perpendicular to the first connector 311a. The second bridges 311c-2 and 311c-4 can be formed to have different lengths.

[0083] The second connection wire 312 includes a first connector 312a, a second connector 312b, and an extension portion 312c.

[0084] The first connector 312a is connected to the pad P in a manner similar to the first connector 311a of the first connection wire 311. In this case, the first connector 312a extends in the second direction. That is, the first connector 312a extends from the pad P to the display panel 100. The first connector 312a can be formed linearly in the second direction.

[0085] The second connector 312b is connected to the display panel 100 and is connected to the first connector 312a through the extension portion 312c. The second connector 312b can be bent and connected to the signal line of the display panel 100.

[0086] The extension portion 312c is connected between the first connector 312a and the second connector 312b and can increase the resistance of the second connection wire 312. The extension portion 312c increases the length of the connection wire to increase the resistance of the wire.

[0087] To increase the length of the connection wire, the extension portion 312c is formed with a portion configured by rotating the letter S by 90 degrees.

[0088] Specifically, the extension portion 312c includes a plurality of first bridges 312c-1, 312c-3, and 312c-5 and a plurality of second bridges 312c-2 and 312c-4. The first bridges 312c-1, 312c-3, and 312c-5 are arranged parallel to the first connector 312a, while the second bridges 312c-2 and 312c-4 are arranged perpendicular to the first bridges 312c-1, 312c-3, and 312c-5. The lengths (e.g., L1) of the first bridges 312c-1, 312c-3, and 312c-5 are formed to be greater than the lengths (e.g., M1) of the second bridges 312c-2 and 312c-4. The plurality of second bridges can form a predetermined angle with the first bridges, where the predetermined angle is 90 degrees or not 90 degrees. For example, one first bridge can form an angle less than 90 degrees with one second bridge, and then the second bridge can form an angle greater than 90 degrees with the next first bridge.

[0089] The first bridges 312c-1, 312c-3, and 312c-5 and the second bridges 312c-2 and 312c-4 are alternately connected. When the first bridges 312c-1, 312c-3, and 312c-5 and the second bridges 312c-2 and 312c-4 are alternately connected, as Figure 5 shown, the extension portion 312c can be arranged in a shape formed by rotating the letter S by 90 degrees. That is, the first bridge 312c-1, the second bridge 312c-2, the first bridge 312c-3, the second bridge 312c-4, and the first bridge 312c-5 are arranged in sequence, so it can be arranged according to the above-mentioned shape.

[0090] The first bridge 312c-1 is connected to the first connector 312a and is arranged along the same direction as the first connector 312a. Thus, the second connection wire 312 has a portion that extends from the pad P to the display panel 100 and travels in the reverse direction in the extension portion 312c. Here, the reverse portion represents the portion of the second connection wire 312 that extends from the pad P to the display panel 100 in the second direction, where the second connection wire 312 extends forward to the display panel 100, bends in the reverse portion and extends back toward the pad P, and then bends and extends to the display panel 100. The second connection wire 312 bends at least twice, and the wire bends in the reverse direction at least once.

[0091] The extension portion 311c of the first connection wire 311 and the extension portion 312c of the second connection wire 312 can be formed to be identical to each other when one of the extension portions is rotated by 180 degrees. For example, when the extension portion 311c of the first connection wire 311 is rotated by 180 degrees in the first direction with respect to the dashed line I1 passing through the centers of the extension portions 311c and 312c, it can be transformed into the same shape as the extension portion 312c of the second connection wire 312.

[0092] Among the plurality of connection wires 300, the adjacent first connection wire 311 and the second connection wire 312 are separated and provided with a predetermined interval D1 to form the above-mentioned shape. That is, as Figure 4 and Figure 6 shown, the two first connection wires 311 and the second connection wire 312 are extended and formed with a constant interval D1 therebetween.

[0093] For example, the first bridges 311c-1, 311c-3, and 311c-5 of the adjacent first connection wire 311 are set to be separated from the first bridges 312c-1, 312c-3, and 312c-5 of the second connection wire 312 at a constant interval D1. The second bridges 311c-2 and 311c-4 of the adjacent first connection wire 311 are set to be separated from the second bridges 312c-2 and 312c-4 of the second connection wire 312 at a constant interval D1.

[0094] According to the first exemplary embodiment of the inventive concept, since the first connection wire 311 and the second connection wire 312 include portions that return in the second direction, it is easy to increase the length of the wire within a predetermined width. As Figure 4 and Figure 5 shown, the first connection wire 311 and the second connection wire 312 include portions that return in the second direction, so the resistance of the connection wire can be increased without deteriorating the integration degree of the connection wire.

[0095] Referring to Figure 6 , the first connection wire 311 and the second connection wire 312 are formed on different layers. The first connection wire 311 and the second connection wire 312 are sequentially stacked on the substrate SUB. The second insulating layer IL2 can be provided between the first connection wire 311 and the second connection wire 312.

[0096] The first connection wire 311 can be formed on the same layer as the second gate wire GW2 of the display panel 100. The second connection wire 312 can be formed on the same layer as the first gate wire GW1 of the display panel 100.

[0097] When the first connection wire 311 and the second connection wire 312 are formed on a single layer and the interval D1 between the first connection wire 311 and the second connection wire 312 decreases, the possibility of short - circuit between the first connection wire 311 and the second connection wire 312 increases. The etching process has limitations in reducing the interval D1 between the first connection wire 311 and the second connection wire 312. However, according to the first exemplary embodiment of the inventive concept, by forming the first connection wire 311 and the second connection wire 312 on different layers, the interval D1 between the first connection wire 311 and the second connection wire 312 can be minimized. That is, when the interval D1 between the first connection wire 311 and the second connection wire 312 decreases, the possibility of short - circuit between the first connection wire 311 and the second connection wire 312 is reduced.

[0098] Figure 13 A comparison of connection wires configured with a single layer and a double layer is shown.

[0099] Reference Figure 13 (A), when the first connection wire 311 and the second connection wire 312 are formed with a constant interval D1, an insulating layer is provided between the first connection wire 311 and the second connection wire 312, so the possibility that the first connection wire 311 and the second connection wire 312 are short - circuited by external particles E is low. However, as Figure 13 (B) shows, when the first connection wire 311 and the second connection wire 312 are formed on the same layer at the same interval D1 as shown in Figure 13 (A), the possibility that the first connection wire 311 and the second connection wire 312 are short - circuited by external particles E increases.

[0100] As described above, the first connection wire 311 and the second connection wire 312 are formed on different layers to prevent the first connection wire 311 and the second connection wire 312 from being short - circuited by external particles.

[0101] The interval D1 between the first connection wire 311 and the second connection wire 312 can be minimized so that the integration degree of the connection wires can be increased. The width S1 of the first connection wire 311 can correspond to the width S2 of the second connection wire 312.

[0102] As described in the first exemplary embodiment of the inventive concept, the first connection wire 311 and the second connection wire 312 are formed in two layers, and they can be configured in three or four layers.

[0103] Reference Figure 1 , the pad P is configured with a plurality of connection pad terminals P1 and connection pad terminals P3, and a plurality of empty pad terminals P2.

[0104] As described above, a plurality of connection pad terminals P1 and connection pad terminals P3 can be connected to a plurality of connection wires 300. That is, some of the connection wires are connected to the connection pad terminals P1, and the remaining connection wires are connected to the connection pad terminals P3.

[0105] Dummy pad terminals P2 can be provided between the connection pad terminals P1 and the connection pad terminals P3. The connection wires are not connected to the dummy pad terminals P2.

[0106] Regarding the display device according to the first exemplary embodiment of the inventive concept, a flexible film 400 is connected to the pads P in the peripheral area PA. The first driving chip 200 for driving the display panel 100 can be mounted on the flexible film 400. The flexible film 400 can be a chip on film (COF).

[0107] The flexible film 400 can be produced by forming a plurality of metal wires on a flexible base film.

[0108] The first driving chip 200 can be mounted on the base film and can generate driving signals. For example, the first driving chip 200 can be a scan driving circuit for receiving control signals and generating scan signals, or a data driving circuit for generating data signals. That is, the gate driver 210 or the data driver 230 can be formed in the first driving chip 200.

[0109] In the first exemplary embodiment of the inventive concept, a COF type flexible film 400 is disposed on the pads P. In addition, as Figure 9 shown, a chip on glass type second driving chip 500 can be disposed in the peripheral area PA of the substrate SUB. A first side of the second driving chip 500 is connected to the pads P. A second side of the second driving chip 500 can be connected to another pad N through additional wires formed in the peripheral area PA.

[0110] In a similar manner to the first driving chip 200, the second driving chip 500 can be a scan driving circuit for receiving control signals and generating scan signals or a data driving circuit for generating data signals. That is, the gate driver 210 or the data driver 230 can be formed in the second driving chip 500.

[0111] In an exemplary variation of the connection wires according to the first exemplary embodiment of the inventive concept, a first connection wire 331 and a second connection wire 332 are arranged such that their adjacent sides can overlap each other.

[0112] Referring to Figure 7 and Figure 8 , no gap is provided between the first connection wire 331 and the second connection wire 332, and the mutually facing sides overlap each other. That is, Figures 4 to 6The first connection wire 311 and the second connection wire 312 are respectively provided with a fixed interval D1, and in Figure 7 and Figure 8 in the exemplary variation shown, it can be set such that the interval D1 can approach 0.

[0113] According to this exemplary variation, the integration degree of multiple connection wires 300 provided in the peripheral area PA of the substrate SUB can be further improved. That is, the connection wires 300 can be set more densely by removing the intervals among the connection wires 300.

[0114] Now, a display device including connection wires according to a second exemplary embodiment of the present inventive concept will be described with reference to Figures 10 to 12 In the second exemplary embodiment of the present inventive concept, the same detailed description as in the first exemplary embodiment of the present inventive concept will be omitted.

[0115] Figure 10 An enlarged view of the connection wires according to the second exemplary embodiment of the present inventive concept is shown, Figure 11 showing Figure 10 the first connection wire and the second connection wire, and Figure 12 showing a cross-sectional view of line XII-XII with respect to Figure 10 this.

[0116] Referring to Figure 10 and Figure 11 , in a manner similar to the first exemplary embodiment of the present inventive concept, adjacent first connection wire 351 and second connection wire 352 among multiple connection wires 300 include portions extending from the pad P to the display panel 100 in the second direction, where the connection wires 351 and 352 extend forward to the display panel 100, bend to extend back towards the pad P, and then bend and extend to the display panel 100 to increase the resistance of the connection wires. The connection wires 351 and 352 bend at least twice, and these wires bend towards the reverse direction at least once. For example, the connection wire may include a portion formed by rotating the letter S by 90 degrees.

[0117] The extension portion 351c of the first connection wire 351 and the extension portion 352c of the second connection wire 352 can be formed to be the same as each other when one of the extension portions is rotated by 180 degrees. For example, when the extension portion 351c of the first connection wire 351 is rotated by 180 degrees with respect to the dashed line I2 passing between the extension portion 351c of the first connection wire 351 and the extension portion 352c of the second connection wire 352 in the first direction, it can become the same shape as the extension portion 352c of the second connection wire 352.

[0118] Referring to Figure 11, the first connection wire 351 includes a first connector 351a, a second connector 351b, and an extension portion 351c.

[0119] The first connector 351a is connected to the pad P. The first connector 351a extends and is formed in the second direction. That is, the first connector 351a is formed by extending from the pad P to the display panel 100. The first connector 351a can be formed linearly in the second direction.

[0120] The second connector 351b is connected to the display panel 100 and is connected to the first connector 351a through the extension portion 351c. The second connector 351b is bent and then connected to the signal line of the display panel 100 to be formed.

[0121] The extension portion 351c is connected between the first connector 351a and the second connector 351b to increase the resistance of the first connection wire 351. The extension portion 351c increases the length of the connection wire to increase the resistance of the wire.

[0122] The extension portion 351c may include a portion formed by rotating the letter S by 90 degrees to increase the length of the connection wire.

[0123] The extension portion 351c includes a plurality of first bridges 351c-1, 351c-3, and 351c-5 and a plurality of second bridges 351c-2, 351c-4, and 351c-6. The first bridges 351c-1, 351c-3, and 351c-5 are arranged parallel to the first connector 351a, while the second bridges 351c-2, 351c-4, and 351c-6 are arranged perpendicular to the first bridges 351c-1, 351c-3, and 351c-5. The second bridges 351c-2 and 351c-4 may be formed to have the same length. The plurality of second bridges may form a predetermined angle with the first bridges, where the predetermined angle is 90 degrees or not 90 degrees. For example, one first bridge may form an angle less than 90 degrees with one second bridge, and then this second bridge may form an angle greater than 90 degrees with the next first bridge.

[0124] The first bridges 351c-1, 351c-3, and 351c-5 and the second bridges 351c-2, 351c-4, and 351c-6 are alternately connected to each other. When the first bridges 351c-1, 351c-3, and 351c-5 and the second bridges 351c-2, 351c-4, and 351c-6 are alternately connected, as Figure 11 shown, the extension portion 351c can be arranged in a manner similar to rotating the letter S by 90 degrees. That is, the first bridge 351c-1, the second bridge 351c-2, the first bridge 351c-3, the second bridge 351c-4, the first bridge 351c-5, and the second bridge 351c-6 are sequentially arranged, so it can be arranged according to the above-mentioned shape.

[0125] Unlike the first exemplary embodiment of the inventive concept, the first bridge of the adjacent second connection wire 352 is not provided among the first bridges 351c-1, 351c-3, and 351c-5 of the first connection wire 351. That is, in the first exemplary embodiment of the inventive concept, the extensions of the first connection wire 311 and the second connection wire 312 overlap each other, while in the second exemplary embodiment of the inventive concept, the extensions of the first connection wire 351 and the second connection wire 352 are provided separately from each other.

[0126] Reference Figure 12 , in a manner similar to the first exemplary embodiment of the inventive concept, the first connection wire 351 and the second connection wire 352 are formed on different layers. The first connection wire 351 and the second connection wire 352 are sequentially stacked on the substrate SUB. The second insulating layer IL2 may be provided between the first connection wire 351 and the second connection wire 352.

[0127] In a display device including connection wires according to an exemplary embodiment of the inventive concept, the first connection wire 311 and the second connection wire 312 are formed on different layers to prevent the first connection wire 311 and the second connection wire 312 from being short-circuited by external particles, and the interval between the adjacent first connection wire 311 and the second connection wire 312 can be minimized to increase the integration degree of the connection wires.

[0128] Although the present invention has been described with respect to presently considered to be practicable exemplary embodiments, it should be understood that the present invention is not limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A display device, comprising: a substrate including a display area for displaying an image and a peripheral area adjacent to the display area; a plurality of signal lines provided in the display area; a pad provided in the peripheral area and including a plurality of pad terminals arranged in a first direction; and a plurality of connection wires connecting the signal lines and the pad terminals, wherein the connection wires include a first connection wire and a second connection wire adjacent to each other, the first connection wire and the second connection wire are bent at least twice in the first direction and a second direction intersecting the first direction in the peripheral area, wherein at least one time is bent in the reverse direction, the first connection wire and the second connection wire each include: a first portion and a second portion extending in the second direction; and a third portion connecting the first portion and the second portion and extending in the first direction, and the adjacent first portion and second portion of the first connection wire, and the third portion connecting the first portion and the second portion are arranged between the first portion and the second portion of the second connection wire in the first direction.

2. The display device according to claim 1, further comprising: an insulating layer provided on the substrate, wherein the first connection wire is provided between the substrate and the insulating layer, and the second connection wire is provided on the insulating layer.

3. The display device according to claim 1, wherein, The first connection wire and the second connection wire are separated from each other at a predetermined interval.

4. The display device according to claim 1, wherein, The third portion of the second connection wire is closer to the pad than the third portion of the first connection wire.

5. The display device according to claim 1, wherein, The first direction and the second direction are perpendicular to each other.

6. The display device according to claim 1, wherein, The first portion and the second portion are parallel to each other.

7. The display device according to claim 1, wherein, The third portions are parallel to each other.

8. The display device according to claim 7, wherein, The third portion of the second connection wire is longer than the third portion of the first connection wire.

9. The display device according to claim 1, wherein, The first connection wire and the second connection wire each further include: a fourth portion extending in the second direction; and a fifth portion connecting the second portion and the fourth portion and extending in the first direction.

10. The display device according to claim 9, wherein, The second portion, the fourth portion, and the fifth portion of the second connection wire are arranged between the second portion and the fourth portion of the first connection wire in the first direction.

11. The display device according to claim 9, wherein, The fifth portion of the second connection wire is closer to the pad than the fifth portion of the first connection wire.

12. The display device according to claim 1, further comprising: a flexible film connected to the pad and including a first side, and a first driving chip is provided on the first side.

13. The display device according to claim 1, further comprising: a second driving chip provided in the peripheral area and connected to the pad.

14. The display device according to claim 1, wherein, The signal lines connected to the first connection wire and the second connection wire among the signal lines are provided in different layers.

15. The display device according to claim 1, wherein, The signal lines are gate lines or data lines.

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