Indication device

Abstract

To provide a display device that has a new structure.SOLUTION: The display device comprises: a first dam that encloses a display region and a second dam that encloses the first dam; first and second sensor electrodes that overlap the display region; and first and second sensor wiring lines that are provided on the first dam and electrically connect to the first and second sensor electrodes, respectively; a first wiring line that is provided below the second dam and electrically connects to the first sensor wiring line at a first contact section; a second wiring line that is provided below the second dam and electrically connects to the second sensor wiring at a second contact section. The first and second contact sections are located between the first and second dams. The second dam overlaps the first wiring line in a first superposition section and overlaps the second wiring line in a second superposition section. The second dam has a recess between the first and second superposition sections in a plan view that is recessed toward the display region.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] One embodiment of the present invention relates to a display device. [Background technology]

[0002] One known display device that is bonded to a flexible printed circuit board is one that employs an on-cell touch sensor (see Patent Document 1). The touch sensor has electrodes formed on a sealing layer, and the display device has wiring formed thereon for transmitting signals from the electrodes to the flexible printed circuit board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-74709 Summary of the Invention [Problem to be solved by the invention]

[0004] However, display devices that use touch sensors with external drive circuits, such as flexible printed circuit boards, require mounting pads for mounting the external drive circuits in the peripheral area surrounding the display area. Wiring is also required to connect the electrodes used in the touch sensor to the mounting area. These installations can occupy a large area of ​​the peripheral area.

[0005] An object of one embodiment of the present invention is to provide a display device having a novel structure, and also to narrow the frame of the display device. [Means for solving the problem]

[0006] One embodiment of the present invention is a display device. The display device includes a display area, a first dam surrounding the display area, a second dam surrounding the first dam, first and second sensor electrodes overlapping the display area, a first sensor wiring provided on the first dam and electrically connected to the first sensor electrode, a second sensor wiring provided on the first dam and electrically connected to the second sensor electrode, a first wiring provided below the second dam and electrically connected to the first sensor wiring at a first contact portion, and a second wiring provided below the second dam and electrically connected to the second sensor wiring at a second contact portion. The first and second contact portions are located between the first and second dams. The second dam overlaps with the first wiring at a first overlapping portion and also overlaps with the second wiring at a second overlapping portion. In addition, the second dam has a recess recessed toward the display area between the first and second overlapping portions in a plan view.

[0007] One embodiment of the present invention is a display device. The display device includes a display area, a first dam surrounding the display area, a second dam provided around the periphery of the display area and having cut surfaces at both ends, a first sensor electrode and a second sensor electrode overlapping the display area, a first sensor wiring provided on the first dam and electrically connected to the first sensor electrode, a second sensor wiring provided on the first dam and electrically connected to the second sensor electrode, a first wiring provided below the second dam and electrically connected to the first sensor wiring at a first contact portion, and a second wiring provided below the second dam and electrically connected to the second sensor wiring at a second contact portion. The first contact portion and the second contact portion are located between the first dam and the second dam. The second dam overlaps with the first wiring at a first overlapping portion and also overlaps with the second wiring at a second overlapping portion. In addition, the second dam has a recess recessed toward the display area between the first overlapping portion and the second overlapping portion in a plan view. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 2]1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 3] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 4] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Figure 5] 1 is a schematic end view of a display device according to an embodiment of the present invention; [Figure 6] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 7] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 8] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 9] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 10] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 11] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 12] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 13] 1 is a schematic top view of a display device according to an embodiment of the present invention; [Figure 14] 1 is a schematic top view of a display device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, each embodiment of the present invention will be described with reference to the drawings, etc. However, the present invention can be embodied in various forms without departing from the spirit of the present invention, and should not be construed as being limited to the description of the embodiments exemplified below.

[0010] In order to clarify the description, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment, but these are merely examples and do not limit the interpretation of the present invention. In this specification and each drawing, elements having the same functions as those explained in the previous drawings may be assigned the same reference numerals, and duplicate explanations may be omitted.

[0011] In this specification and claims, when expressing an aspect of placing another structure on top of a certain structure, the term "on top" is used, unless otherwise specified, to include both a case where another structure is placed directly on top of a certain structure so as to be in contact with the certain structure, and a case where another structure is placed above a certain structure via yet another structure.

[0012] In this specification and claims, the expression "a structure is exposed from another structure" means a state in which a part of a structure is not covered by another structure, and also includes a state in which the part not covered by another structure is covered by yet another structure.

[0013] In this specification and claims, the term "end view" refers to an object cut vertically and viewed from the side. An end view includes a view when viewed from the end. A "plan view" refers to an object viewed from directly above. A top view or plan view includes a view when viewed from the top.

[0014] First Embodiment 1. Overall structure In this embodiment, the structure of a display device 100a according to one embodiment will be described. Fig. 1 is a schematic top view of the display device according to the embodiment.

[0015] 1, the display device 100a has a substrate 102, and a plurality of pixels 104 and a touch sensor 106 are provided on the substrate 102. The display device 100a further has a drive circuit 108, a mounting pad 110, a first dam 112, and a second dam 114.

[0016] The display device 100a includes a display area 116 and a surrounding peripheral area 118. A plurality of pixels 104 and a touch sensor 106 are arranged in the display area 116, while a drive circuit 108, mounting pads 110, a first dam 112, and a second dam 114 are arranged in the peripheral area 118. Although omitted in FIG. 1, the display device 100a further includes an opposing substrate 122 that is paired with the substrate 102 and overlaps with the display area 116 and the peripheral area 118, as indicated by dotted lines in FIG. 2, which will be described later.

[0017] On the substrate 102, structures such as the above-described plurality of pixels 104 and sensor electrodes 124 can be provided in the display region 116 and the peripheral region 118. As shown in FIG. 1, the outer shape of the substrate 102 can have an arc-shaped portion. However, the outer shape of the substrate 102 may be polygonal or even rectangular. Here, when a plurality of display devices 100a are manufactured from a single substrate, the outer shape of the substrate 102 is the outer shape of the display device 100a cut out from the single substrate.

[0018] The plurality of pixels 104 are arranged in the display region 116, for example, in a row direction (X direction) and a column direction (Y direction). Each pixel 104 is provided with a light-emitting element (not shown), which is electrically connected to a transistor provided in each pixel 104. The light-emitting element may be, for example, an organic electroluminescence (EL) element. The organic EL element may include a pair of electrodes serving as an anode and a cathode, an organic layer containing an organic EL material, and an insulating partition layer (Pixel Defining Layer: PDL) that separates adjacent organic EL elements.

[0019] Although not shown, a transistor is provided in each pixel 104. These transistors are electrically connected to a drive circuit 108, and signals from the drive circuit 108 are supplied to them.

[0020] The driving circuits 108 that supply signals to the pixels 104 can be arranged between the display area 116 and the first dam 112. Although Fig. 1 shows an example in which a plurality of driving circuits 108 are arranged to sandwich the display area 116, the arrangement is not limited to this.

[0021] The drive circuit 108 can be electrically connected to an external drive circuit via wiring (not shown) and can drive the pixels 104 in response to signals supplied from the external drive circuit. A drive integrated circuit (IC) can be used as the external drive circuit, and the drive IC can supply signals to the drive circuit 108 via mounting pads 110.

[0022] The driving IC may be, for example, a COF (Chip On Glass). The mounting pad 110 may be, for example, a FOG (Film On Glass) in which a wiring board is mounted on a plurality of external connection terminals 126 using an anisotropic conductive film. When a COF is mounted on the mounting pad 110 using a FOG, the COF is mounted to the mounting pad 110 by thermocompression bonding in a COF mounting area 128 including the mounting pad 110 shown in FIG.

[0023] The touch sensor 106 can be configured with a plurality of sensor electrodes 124, as shown in Fig. 1. The sensor electrodes 124 are shown in the shape of diamonds with diagonals in the X and Y directions in Fig. 1, but are not limited to this shape.

[0024] The touch sensor 106 may be of a capacitive type, a resistive type, or the like. When the capacitive type is used for the touch sensor 106, the multiple sensor electrodes 124 may be arranged in a matrix in the display area 116, for example, and may be connected in a row or column direction. The sensor electrodes 124 connected in the row direction and the sensor electrodes 124 connected in the column direction are spaced apart from each other. The sensor electrodes 124 connected in the row direction or the column direction may function as transmitting or receiving electrodes, respectively. The sensor electrodes 124 connected in the row direction or the column direction are electrically connected to an external drive circuit, and one of the sensor electrodes 124 connected in the row direction or the column direction may receive a signal from the external drive circuit, and the other may receive a signal from the external drive circuit.

[0025] The drive circuit that drives the sensor electrode 124 can be a drive IC, similar to the external drive circuit of the pixel 104. The sensor electrode 124 is electrically connected to the drive IC via the mounting pad 110 that is electrically connected to the sensor wiring 130 (sensor wiring 130-1 and sensor wiring 130-2). The above-mentioned FOG or COF can be used for the mounting pad 110 and the drive IC.

[0026] 1, the sensor wiring 130 and the mounting pad 110 are electrically connected by directly or electrically connecting the sensor wiring 130 to wiring 138 at contact 132, and further directly or electrically connecting wiring 138 to mounting pad 110. Although not shown, the sensor wiring 130 is arranged from one side of the sensor electrodes 124 connected in the row direction or column direction, and as shown in Fig. 1, is directly or electrically connected to wiring 138 at contacts 132 arranged on the left and right of mounting pad 110 in a plan view. A plurality of contacts 132-1 arranged to the left of mounting pad 110 and a plurality of contacts 132-2 arranged to the right of mounting pad 110 are included in contact portion 134-1 and contact portion 134-2, respectively.

[0027] Contact portion 134-1 and contact portion 134-2 are disposed and spaced apart between first dam 112 that surrounds display area 116 and second dam 114 that surrounds the first dam. Contact portion 134-1 and contact portion 134-2 also ensure space between first dam 112 and second dam 114 for contacting sensor wiring 130 and wiring 138.

[0028] Sensor wiring 130 electrically connected to contact portion 134-1 overlaps with first dam 112 at overlapping portion 136-1 of first dam 112 between sensor electrode 124 and contact portion 134-1. Sensor wiring 130 electrically connected to contact portion 134-2 overlaps with first dam 112 at overlapping portion 136-2 of first dam 112 between sensor electrode 124 and contact portion 134-2. Wiring 138 electrically connected to contact portion 134-1 overlaps with second dam 114 at overlapping portion 140-1 of second dam 114 between mounting pad 110 and contact portion 134-1. Furthermore, the wiring 138 electrically connected to the contact portion 134-2 overlaps with the second dam 114 at an overlapping portion 140-2 of the second dam 114 between the mounting pad 110 and the contact portion 134-2.

[0029] As described above, the first dam 112 and the second dam 114 overlap with the wiring 138 and the sensor wiring 130 that are directly or electrically connected to the contact portion 134, but do not overlap with the contact portion 134. The contact portion 134 and the first dam 112, as well as the second dam 114, are arranged at a distance that ensures a space for contacting the sensor wiring 130 and the wiring 138 described above.

[0030] Furthermore, second dam 114 is placed at a certain distance from mounting pad 110. Second dam 114 is also placed at a certain distance from COF installation area 128, where a film or the like on which a driving IC is mounted is placed on mounting pad 110. This certain distance may be a distance that minimizes the impact on second dam 114 due to thermocompression bonding when placing a COF or the like in COF installation area 128. Specifically, the certain distance may be a distance that prevents second dam 114 from being burned or the sealing of second dam 114 from being broken due to thermocompression bonding.

[0031] In order to achieve the above arrangement and to bring the mounting pad 110 and the COF installation area 128 closer to the display area 116, the second dam 114 has a recess 142, which is a recessed portion recessed toward the display area 116 in a plan view, between the overlapping portions 140-1 and 140-2 of the second dam 114. The recess 142 of the second dam 114 is located between the first dam 112 and the mounting pad 110, and can be further located between the contact portion 134-1 and the contact portion 134-2. The recess 142 of the second dam 114 is located at a certain distance from the contact portions 134-1 and 134-2 and the COF installation area 128, as described above.

[0032] The second dams 114 are arranged as described above around the mounting pads 110 and the contact portions 134, but as shown in FIG. 1, the outer shape of the second dams 114 can have arc-shaped portions.

[0033] Similarly, the outer shape of the first dam 112 surrounded by the second dam 114 can also have an arc-shaped portion. Although the outer shapes of the first dam 112 and the second dam 114 are shown in an example of having an arc-shaped shape in Fig. 1, they are not limited to this shape as long as they have a shape that is suited to the outer shape of the display device 100a.

[0034] Furthermore, the counter substrate 122 is provided so as to cover the inside of the substrate 102 beyond the second dam 114. The counter substrate 122 protects structures on the substrate 102, such as the sensor electrodes 124. The outer shape of the counter substrate 122 may be shaped to follow the outer shape of the substrate 102, as shown in Fig. 1. However, the counter substrate 122 is positioned away from the mounting pads 110 and the COF installation area 128, and is positioned so as not to interfere with the mounting of the driving IC or the like. 2.Substructure 2-1.Substructure-1

[0035] Fig. 2 shows a schematic top view of a partial structure 144-1 of the display device 100a surrounded by a chain line in Fig. 1, and Fig. 3 shows a schematic top view of a partial structure 144-2 of the display device 100a surrounded by a chain line in Fig. 1. Hereinafter, descriptions of the same configuration as in Fig. 1 may be omitted.

[0036] As shown in FIG. 2, the second dam 114 has a recess 142 toward the display area 116, so that the length 146 between the second dam 114 and the first dam at the recess 142 is shorter than the length 148-1 between the second dam and the first dam 112 at the contact portion 134-1.

[0037] 2 is shorter than length 148-1 between overlapping portion 136-1 of first dam 112 and overlapping portion 140-1 of second dam 114. Here, first dam 112, which defines length 146, is between adjacent overlapping portions 136-1 and 136-2. Furthermore, second dam 114, which defines length 146, is between adjacent overlapping portions 140-1 and 140-2. In this case, sensor wiring 130 overlapping with overlapping portion 136-1 and wiring 138 overlapping with overlapping portion 140-1 are directly and / or electrically connected by contact 132-1.

[0038] 3, the length between the first dam 112 and the second dam 114 can be similarly defined. As shown in FIG. 3, the second dam 114 has a recess 142 facing the display area 116, and therefore the length 146 between the second dam 114 and the first dam 112 in the recess 142 is shorter than the length 148-2 between the second dam and the first dam 112 in the contact portion 134-2.

[0039] 3 is shorter than length 148-2 between overlapping portion 136-2 of first dam 112 and overlapping portion 140-2 of second dam 114. Here, as described above, first dam 112 that defines length 146 is the length between adjacent overlapping portions 136-1 and 136-2. In this case, sensor wiring 130 overlapping overlapping portion 136-2 and wiring 138 overlapping overlapping portion 140-2 are directly and / or electrically connected by contact 132-2.

[0040] 2, the wiring 138 having an overlap at the overlapping portion 140-1 can be electrically connected to the terminal 126 mounted on the mounting pad 110 via the terminal wiring 150. At this time, the wiring 138 and the terminal wiring 150 can be directly and / or electrically connected to each other via the contact 152. The terminal wiring 150 can be covered with an insulating film 154 between the contact 152 and the terminal 126.

[0041] 3, the wiring 138 having an overlap at the overlapping portion 140-2 can be electrically connected to the terminal 126 mounted on the mounting pad 110 via the terminal wiring 150. At this time, the wiring 138 and the terminal wiring 150 can be directly and / or electrically connected to each other via the contact 152. The terminal wiring 150 can be covered with an insulating film 154 between the contact 152 and the terminal 126.

[0042] 2-2. Cross-sectional structure-1 FIG. 4 shows a schematic end view taken along the chain line A1-A2 shown in FIG.

[0043] 4, in the display device 100a, an undercoat film 156 and an insulating film 158 are provided on a substrate 102, and wiring 138 is provided on the insulating film 158. Furthermore, an interlayer film 160 is provided on the wiring 138 and the insulating film 158, and a second dam 114 is provided on the interlayer film 160. Here, the wiring 138 and the second dam 114 overlap at overlapping portions 140-1 and 140-2 of the second dam 114.

[0044] The second dam 114 has a second dam layer 114b provided on a second dam layer 114a so as to cover the second dam layer 114a. A protective film 164 is provided on the second dam layer 114b, and a protective film 166 is provided thereon. An overcoat layer 168 is further provided on the protective film 166.

[0045] An opposing substrate 122 can be provided on the overcoat layer 168. The opposing substrate 122 can have an adhesive layer 170 on the surface facing the overcoat layer 168, as shown in Fig. 4. Note that Fig. 4 shows the structure of the second dam 114 surrounding the display area 116 described above and the structure around it, but there are no limitations on these structures, and various structures can be used.

[0046] In Figure 1, the second dam 114 is arranged to seamlessly surround the first dam 112, but since it has a recess 142 that is recessed toward the display area 116 around the mounting pad 110, the second dam 114 is separated in a cross section along the line connecting the overlapping portion 140-1 and the overlapping portion 140-2, such as A1-A2 shown in Figure 4.

[0047] 2-3. Cross-sectional structure-2 Fig. 5 is a schematic end view taken along the chain line B1-B4 shown in Fig. 2. Hereinafter, the description of the same configuration as in Fig. 4 may be omitted.

[0048] As described above, the display device 100a has the substrate 102, which may be, for example, a glass or quartz substrate, or an organic resin substrate. When an organic resin substrate is used, the substrate 102 may be flexible.

[0049] As described above, the underlayer 156 can be provided on the substrate 102. The underlayer 156 can prevent contamination from the substrate 102, and can be made of, for example, an inorganic insulating material. Examples of the inorganic insulating material that can be used include silicon nitride, silicon oxide, and composites thereof.

[0050] As described above, the insulating film 158 can be provided over the base film 156. Although not shown, the insulating film 158 in the display region 116 can function as a gate insulating film of transistors included in the pixels 104 and the driver circuit 108. The insulating film 158 can be formed using the same material as the base film 156.

[0051] On the insulating film 158, signal lines 172 can be provided in the display region 116, and wiring 138 can be provided in the peripheral region. Signals are supplied from the drive circuit 108 shown in FIG. 1 to each pixel 104 via the signal lines 172. Alternatively, the signal lines 172 can function as power supply lines that supply a constant potential to each pixel 104. As described above, the wiring 138 can function as wiring that transmits signals between the external drive circuit and the touch sensor 106 shown in FIG. 1. The signal lines 172 and the wiring 138 can be made of a material containing, for example, titanium, aluminum, copper, molybdenum, or the like as a main component, and these can be used as a single layer or a laminate.

[0052] An interlayer film 160 can be provided on the signal line 172 and the insulating film 158 so as to cover the signal line 172 and the wiring 138. The interlayer film 160 can also function as a planarization film for the signal line 172 and the wiring 138. The interlayer film 160 can be made of the same material as the base film 156.

[0053] Terminal wiring 150 can be provided on the wiring 138 and the interlayer film 160, and connected to the wiring 138 via contacts 152. The terminal wiring 150 can be made of the same material as the signal line 172 and the wiring 138.

[0054] A planarization film 174 can be provided on the interlayer film 160 and the signal lines 172 in the display region 116. Furthermore, a first dam 112 and a second dam 114 are provided on the interlayer film 160 in the peripheral region 118. The second dam 114 is provided on the interlayer film 160 so as to overlap with the wiring 138. Furthermore, an insulating film 154 continuous with the second dam 114 can be provided on the terminal wiring 150. The insulating film 154 can be formed simultaneously with the second dam 114, for example, by half-tone exposure and etching of a second dam layer 114a of the film that forms the second dam 114.

[0055] Here, the terminal wiring 150 disposed under the insulating film 154 has a portion exposed from the insulating film 154 in the COF installation region 128 , which can be used as the terminal 126 of the mounting pad 110 .

[0056] The terminal 126 and the terminal wiring 150 may be made of the same material as the signal line 172 and the wiring 138. The planarizing film 174, the first dam layer 112a, the second dam layer 114a, and the insulating film 154 may be made of a material such as an organic resin containing acrylic resin, polysiloxane, polyimide, polyester, or the like.

[0057] Furthermore, spacers 176 and a partition layer 177 can be provided on the planarization film 174. The partition layer 177 functions as a partition defining the pixels 104. The partition layer 177 is also arranged to cover the electrode edges of the light-emitting elements provided in the pixels 104. The spacers 176 can be arranged on the partition layer 177 and can function to support a fine mask used in the manufacturing process of the light-emitting elements of the pixels 104, such as a vapor deposition process. The partition layer 177 can be formed by halftone exposure in the spacer 176 formation process. In addition, the second dam layer 112b and the second dam layer 114b can be formed on the first dam layer 112a and the second dam layer 114a, respectively, in the same process as the spacer 176 formation process. The spacers 176, the partition layer 177, the second dam layer 112b, and the second dam layer 114b formed in these processes can be made of organic resin materials such as epoxy resin or acrylic resin.

[0058] A first passivation film 178 is provided on the spacer 176 and in a region surrounded by the first dam 112 and the second dam 114 in a plan view. The region surrounded by them includes the display region 116, and when an organic EL element is used in the pixel 104, the first passivation film 178 can prevent impurities from entering the organic EL element. The first passivation film 178 can be provided in the same layer as the protective film 164 provided on the second dam 114. The first passivation film 178 and the protective film 164 can be made of an inorganic compound such as silicon oxide or silicon nitride, for example.

[0059] A cover layer 180 is provided on the first passivation film 178 in a region surrounded by the first dam 112 in plan view. The cover layer 180 can flatten the surface of the pixel 104 and, if a light-emitting element is provided in the pixel 104, can protect the light-emitting element from impurities. The cover layer 180 can be made of the same material as the insulating film 154.

[0060] A second passivation film 182 can be provided on the cover layer 180 in a region surrounded by the first dam 112 and the second dam 114 in a plan view. The second passivation film 182 can be formed in the same layer as the protective film 166. Therefore, the second passivation film 182 can be made of an inorganic compound such as silicon nitride, for example.

[0061] Since multiple different types of films, such as the cover layer 180 and the second passivation film 182 described above, can provide planarization over the pixels 104 and protect the light-emitting elements provided in the pixels 104 from impurities, structures such as touch sensors 106 can be provided over the pixels 104 in the display area 116.

[0062] A sensor electrode 124 can be provided on the second passivation film 182 in the display region 116. Since the sensor electrode 124 is disposed in the display region 116, a transparent conductive film of a translucent oxide that can ensure visibility of a displayed image, such as conductive indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium tin zinc oxide (ITZO), can be used.

[0063] Furthermore, the sensor wiring 130, which connects to the sensor electrode 124 and the wiring 138, is provided on the second passivation film 182. Since the second passivation film 182 is also disposed on the first dam 112, the sensor wiring 130 is also disposed on the first dam 112. The sensor wiring 130 can be made of the same material as the signal line 172 and the wiring 138.

[0064] Furthermore, an overcoat layer 168 is provided on the sensor electrode 124 and the sensor wiring 130 so as to cover them. The overcoat layer 168 is provided in an area surrounded by the second dam 114 in a plan view. The overcoat layer 168 can be made of the same material as the cover layer 180.

[0065] The counter substrate 122 can be provided on the overcoat layer 168. Although FIG. 5 shows an example in which the counter substrate 122 is arranged so as to overlap the overcoat layer 168, it may be arranged on a structure provided on the substrate 102. The counter substrate 122 can be made of a film or glass having a polarizing plate function. The counter substrate 122 also has a function to protect the structures provided on the substrate 102, such as the pixels 104 and the touch sensor 106. Furthermore, when bonding the counter substrate 122 and the substrate 102 together, an adhesive having a refractive index close to that of the material of the counter substrate 122, such as OCA (Optical Clear Adhesive), can be applied to the surface of the substrate 102 facing the structure.

[0066] 3. Modification of the First Dam 3-1. Variation 1 As shown in FIG. 6, the display device 100b can be provided with a first dam 112 having a convex portion 184. The first dam 112 can have the convex portion 184 that protrudes toward the outside of the substrate 102 around the contact portion 134. The first dam 112 has a portion (convex portion 184) between the overlapping portion 136-1 and the overlapping portion 136-2 that is convex toward the second dam 114 relative to the overlapping portions 136-1 and 136-2 in a planar view. In this case, the convex portion 184 of the first dam 112 is disposed opposite the concave portion 142 of the second dam 114. Furthermore, the convex portion 184 of the first dam 112 and the concave portion 142 of the second dam 114 are located between the contact portion 134-1 and the contact portion 134-2. Furthermore, the protrusion 184 of the first dam 112 and the recess 142 of the second dam 114 are located between the mounting pad 110 and the display area 116 .

[0067] 3-2. Variation 2 7, the first dam 112 can have a recess 188 facing the display area 116 in the area sandwiched between the mounting pad 110 and the display area 116. In this case, when the display device 100c has a plurality of contact portions 134 that sandwich the recess 142 of the second dam 114, it can also be said that the first dam 112 has a protrusion facing the contact portion 134.

[0068] 7, a plurality of sensor wirings 130 are connected to the contact portion 134, and these plurality of sensor wirings 130 overlap with the first dam 112 at a plurality of overlapping portions 136. In other words, in the region where these plurality of overlapping portions 136 are located, the first dam 112 has a convex portion facing the second dam 114.

[0069] 4. Variations in product shape In the following description, modified examples of the outer shape of the substrate 102 are shown as the outer shapes of the display devices 100d and 100e.

[0070] 4-1. Variation 1 The display device 100d can be provided with a polygonal substrate 102. Figure 8 shows an example in which the display device 100d is provided with a rectangular substrate 102. The first dam 112 and the second dam 114 have portions shaped to follow the outline of the substrate 102. Therefore, as shown in Figure 8, when the substrate 102 is rectangular, the outline of the first dam 112 can be rectangular.

[0071] 9, the first dam 112 can have a convex portion 184 facing the second dam 114 between the display area 116 and the concave portion 142 of the second dam 114. In this case, the outer shape of the first dam 112 may have a shape that is adapted to the outer shape of the substrate 102, except for the convex portion 184.

[0072] The second dam 114 has a recess 142 facing the first dam 112 between the mounting pad 110 and the first dam 112 and between the contact portion 134-1 and the contact portion 134-2, so that the second dam 114 can have a shape that follows the outer shape of the substrate 102 except for the recess 142.

[0073] Therefore, the first dam 112 and the second dam 114 can have a shape that follows the outer shape of the substrate 102, and are therefore adaptable to substrates 102 having various shapes.

[0074] The display device 100 has a display area 116, a first dam 112 surrounding the display area 116, and a second dam 114 surrounding the first dam 112. The display device 100 also has a mounting pad 110 connected to an external drive circuit that supplies signals to the touch sensor 106 provided in the display area 116, and the mounting pad 110 is disposed between the outer shape of the substrate 102 and the second dam 114. In this case, the second dam 114 has a recess 142 facing the first dam 112 between the mounting pad 110 and the first dam 112. Furthermore, the second dam 114 has a recess 142 facing the first dam 112 between a contact portion 134-1 and a contact portion 134-2 located between the first dam 112 and the second dam 114. By having the recess 142 arranged in this manner in the second dam, the mounting pad 110 can be maintained at a certain distance from the second dam 114, and the contact portion 134 can also be positioned close to the display area 116 while maintaining a certain distance between the first dam 112 and the second dam 114.

[0075] Furthermore, according to this embodiment, the first dam 112 has a convex portion facing the second dam between the display area 116 and the concave portion of the second dam 114, so that the display area 116 can be made wider.

[0076] Therefore, by applying this embodiment, structures such as mounting pads 110 and contact portions 134 can be efficiently arranged in the peripheral region 118 of the display device 100e, and the display region 116 can be widely occupied on the substrate 102, thereby providing a display device 100 with a narrow frame.

[0077] Second Embodiment This embodiment shows the structure of a display device 200 according to one embodiment of the present invention. Description of configurations that are the same as or similar to those of the first embodiment may be omitted.

[0078] 1. Overall structure One of the differences between the display device 200 and the display device 100 of the first embodiment is that the display device 200 has a second dam having a portion that surrounds the outline of the product or the outline of the substrate 202. Another difference between the display device 200 and the display device 100 of the first embodiment is that the outline of the product or the outline of the substrate 202 is located between the first dam 212 and the second dam 214, and therefore the second dam 214 has a cut surface 286 resulting from cutting out the display device 200 product.

[0079] 10 is composed of second dams 214-1 and 214-2. Second dam 214-2, which is cut off when display device 200 is cut out as a product, is indicated by a two-dot chain line, and second dam 214-1, which remains on substrate 202, is indicated by a solid line.

[0080] 10, the second dam 214-1 is disposed between the first dam 212 and the outer shape of the substrate 202, and the second dam 214-2 is disposed so as to sandwich the first dam 212 and the outer shape of the substrate 202. In other words, the outer shape of the substrate 202 is located between the first dam 212 and the second dam 214-2.

[0081] Second dam 214-1 is the area from cut surface 286-1 to cut surface 286-2 on substrate 202, and second dam 214-2 is the remaining area. Thus, second dam 214 including recess 242 is second dam 214-1. In addition, recess 242 of second dam 214 is located between cut surface 286-1 and cut surface 286-2.

[0082] 10, second dam 214-1 is disposed between mounting pad 210 and first dam 212, and has cut surfaces 286 at both ends. In this case, the cut surfaces of overcoat layer 268 and second dam 214 are cut surfaces 286-1 along A1 and 286-2 along A2, respectively, as shown in FIG. 4. Therefore, the cut surfaces of overcoat layer 268 disposed on sensor electrode 224 and second dam 214 can be flush with cut surface 286 of second dam 214. However, because the cut surfaces of overcoat layer 268 and second dam 214 are formed when the outer shape of substrate 202 is cut, flushness refers to a state in which there is substantially no step between the cut surface of overcoat layer 268 and cut surface 286 of second dam 214.

[0083] 2. Modification of the First Dam 2-1. Variation 1 The display device 200b can be provided with a first dam 212 having a convex portion 284. The first dam 212 can have the convex portion 284 facing the outer shape of the substrate 202 around the contact portion 234. Specifically, as shown in FIG. 11, the first dam 212 has the convex portion 284 between the second dam 214-1 and the display area 216. When the display area 216 has a circular shape as shown in FIG. 11, a larger space can be secured between the first dam 212, making the display area 216 larger and enabling the display device 200b to have a narrower frame.

[0084] 2-2. Variation 2 The display device 200c can be provided with a first dam 212 having a recess 288. As shown in Fig. 12, the first dam 212 can be provided with a portion (recess 288) that is recessed toward the display region 216. As shown in Fig. 12, the first dam 212 has the recess 288 between the second dam 214-1 and the display region 216. The first dam 212 and the second dam 214 have the recess 288 and the recess 242 between the mounting pad 210 and the display region 216, so that the mounting pad 210 can be disposed closer to the display region 216 than in the display device 200b.

[0085] 3. Variations in product shape In the following description, modified examples of the outer shape of the substrate 202 are shown as the outer shape of the product of the display device 200d. 3-1. Variation 1 The display device 200d may have a polygonal substrate 202. Fig. 13 shows an example in which the substrate 202 of the display device 200d or the outer shape of the product is rectangular. When the outer shape of the substrate 202 or the product is rectangular, the space between adjacent display devices 200d can be used efficiently when manufacturing multiple display devices 200d on a single substrate.

[0086] 13, the outer shape of the first dam 212 is also polygonal, like the substrate 202. Furthermore, if the outer shape of the second dam 214-2 conforms to the outer shape of the substrate 202, the space between adjacent display devices 200d can be used efficiently when manufacturing multiple display devices 200d on a single substrate. In particular, if the second dam 214-2 is rectangular, as shown in FIG. 13, the space between adjacent display devices 200d can be used even more efficiently.

[0087] Next, as shown in FIG. 14, an example will be shown in which the first dam 212 has a convex portion 284 facing the second dam 214 between the display area 216 and the concave portion 242 of the second dam 214.

[0088] 13 and 14, the display area 216 is shown to have a shape that follows the outline of the substrate 202, but the shape of the display area 216 does not have to follow the outline of the substrate 202. For example, the display area 216 in FIG. 13 may be circular as shown in FIG.

[0089] The display device 200 includes a first dam 212 surrounding a display area 216, a second dam 214-1 provided between the outer shape of the substrate 202 and the first dam 212, and a second dam 214-2 surrounding the outer shape of the substrate 202. The second dam 214-1 has a recess 242 facing the first dam 212 between the mounting pad 210 and the first dam, and the recess 242 is disposed between the mounting pad 210 and the first dam. The second dam 214-2 is disposed outside the outer shape of the substrate 202. This arrangement ensures that the mounting pad 210 is spaced a certain distance from the second dam 214, and the contact portion 234 can be disposed close to the display area 216 while maintaining a certain distance between the first dam 212 and the second dam 214. Furthermore, since the second dam 214-2 is disposed outside the outer shape of the substrate 202, the first dam 212 can be disposed closer to the outer shape of the substrate 202. The closer arrangement of the first dams 212 creates a space between the first dams 212 and the display area 216. The drive circuit 208 located between the first dams 212 and the display area 216 is arranged in this space, thereby making the display area 216 wider.

[0090] Therefore, by applying this embodiment, structures such as mounting pads 210, contact portions 234, and drive circuits 208 can be efficiently arranged in the peripheral region 218 of the display device 200, and the display region 216 can be widely occupied on the substrate 202, thereby providing a display device 200 with a narrow frame.

[0091] Even if there are other effects and advantages different from those brought about by the aspects of each of the above-mentioned embodiments, those that are clear from the description in this specification or that can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0092] 100: display device, 100a: display device, 100b: display device, 100c: display device, 100d: display device, 100e: display device, 102: substrate, 104: pixel, 106: touch sensor, 108: drive circuit, 110: mounting pad, 112: first dam, 112a: first dam layer, 112b: first dam layer, 114: second dam, 114a: second dam layer, 114b: second dam layer, 116: display area, 118: peripheral area, 122: opposing substrate, 124: sensor sensor electrode, 126: terminal, 128: installation area, 130: sensor wiring, 132: contact, 132-1: contact, 132-2: contact, 134: contact portion, 134-1: contact portion, 134-2: contact portion, 136: overlapping portion, 136-1: overlapping portion, 136-2: overlapping portion, 138: wiring, 140-1: overlapping portion, 140-2: overlapping portion, 142: recess, 144-1: partial structure, 144-2: partial structure, 148-1: length, 148- 2: length, 150: terminal wiring, 152: contact, 154: insulating film, 156: undercoat film, 158: insulating film, 160: interlayer film, 164: protective film, 166: protective film, 168: overcoat layer, 170: adhesive layer, 172: signal line, 174: planarizing film, 176: spacer, 177: partition layer, 178: first passivation film, 180: cover layer, 182: second passivation film, 184: convex portion, 200: display device, 188: concave portion, 200a: display Device, 200b: display device, 200c: display device, 200d: display device, 202: substrate, 208: drive circuit, 210: mounting pad, 212: first dam, 214: second dam, 214-1: second dam, 214-2: second dam, 216: display area, 218: peripheral area, 224: sensor electrode, 234: contact portion, 242: recess, 268: overcoat layer, 284: protrusion, 286: cut surface, 286-1: cut surface, 286-2: cut surface, 288: recess

Claims

1. A display area; a first dam surrounding the display area; a second dam surrounding the first dam; a first sensor electrode and a second sensor electrode overlapping the display area; a first sensor wiring provided on the first dam and electrically connected to the first sensor electrode; a second sensor wiring provided on the first dam and electrically connected to the second sensor electrode; a first wiring provided below the second dam and electrically connected to the first sensor wiring at a first contact portion; a second wiring provided below the second dam and electrically connected to the second sensor wiring at a second contact portion; the first contact portion and the second contact portion are located between the first dam and the second dam; the second dam overlaps with the first wiring at a first overlapping portion; the second dam overlaps with the second wiring at a second overlapping portion; the second dam has, in a plan view, a recessed portion recessed toward the display area between the first overlapping portion and the second overlapping portion; Display device.

2. the first dam overlaps with the first sensor wiring at a third overlapping portion; the first dam overlaps with the second sensor wiring at a fourth overlapping portion; the first dam has a convex portion that protrudes toward the second dam between the third overlapping portion and the fourth overlapping portion in a plan view; The display device according to claim 1 .

3. The first dam has a polygonal outer shape. The display device according to claim 1 .

4. The outer shape of the first dam has an arc-shaped portion. The display device according to claim 1 .

5. the first dam overlaps with the first sensor wiring at a third overlapping portion; the first dam overlaps with the second sensor wiring at a fourth overlapping portion; a length between the second dam between the first overlapping portion and the second overlapping portion and the first dam between the third overlapping portion and the fourth overlapping portion is shorter than a first length between the first overlapping portion and the third overlapping portion and a second length between the second overlapping portion and the fourth overlapping portion; The display device according to claim 1 .

6. A display area; a first dam surrounding the display area; a second dam provided around the display area and having cut surfaces at both ends; a first sensor electrode and a second sensor electrode overlapping the display area; a first sensor wiring provided on the first dam and electrically connected to the first sensor electrode; a second sensor wiring provided on the first dam and electrically connected to the second sensor electrode; a first wiring provided below the second dam and electrically connected to the first sensor wiring at a first contact portion; a second wiring provided below the second dam and electrically connected to the second sensor wiring at a second contact portion; the first contact portion and the second contact portion are located between the first dam and the second dam; the second dam overlaps with the first wiring at a first overlapping portion; the second dam overlaps with the second wiring at a second overlapping portion; the second dam has a recessed portion recessed toward a display area between the first overlapping portion and the second overlapping portion in a plan view; Display device.

7. the first dam overlaps with the first sensor wiring at a third overlapping portion; the first dam overlaps with the second sensor wiring at a fourth overlapping portion; the first dam has a convex portion that protrudes toward the second dam between the third overlapping portion and the fourth overlapping portion in a plan view; The display device according to claim 6.

8. The first dam has a polygonal outer shape. The display device according to claim 6.

9. The outer shape of the first dam has an arc-shaped portion. The display device according to claim 6.

10. the first dam overlaps with the first sensor wiring at a third overlapping portion; the first dam overlaps with the second sensor wiring at a fourth overlapping portion; a length between the second dam between the first overlapping portion and the second overlapping portion and the first dam between the third overlapping portion and the fourth overlapping portion is shorter than a first length between the first overlapping portion and the third overlapping portion and a second length between the second overlapping portion and the fourth overlapping portion; The display device according to claim 6.

11. an overcoat layer over the first sensor electrode; the cut surface of the overcoat layer and the cut surface of the second dam are flush with each other; The display device according to claim 6.

Images