Display device

Abstract

Display device. An organic light emitting display device and a manufacturing method thereof are disclosed to reduce thickness and weight. An organic light emitting display device having a touch sensor eliminates the necessity of an additional bonding process by directly forming a touch sensor including a touch sensing line and a touch driving line and a color filter on an encapsulation layer covering a light emitting device, thus simplifying a manufacturing process and reducing manufacturing costs.

Description

[0001] This application is a divisional application of the invention patent application filed on February 10, 2017, with application number 201710073167.4 and title "Display Device with Touch Sensor". Technical Field

[0002] Embodiments of this disclosure relate to an organic light-emitting display device with a touch sensor and a method for manufacturing the same, and more specifically, to an organic light-emitting display device with a touch sensor and a method for manufacturing the same, to simplify the manufacturing process and reduce manufacturing costs. Background Technology

[0003] A touchscreen is a device used to input user commands by selecting instructions displayed on a screen, such as a monitor, using the user's hand or an object. That is, the touchscreen converts the contact point where it directly touches the user's hand or object into an electrical signal, and receives the instruction selected at the contact point as an input signal. Such touchscreens can replace additional input devices such as keyboards or mice that operate in conjunction with a monitor, and therefore their applications are gradually expanding.

[0004] Generally, such touchscreens are often attached to the front surface of display panels, such as liquid crystal display panels or organic electroluminescent display panels, using adhesives. In this case, because the touchscreen is manufactured separately and attached to the front surface of the display panel, there is a problem of increased overall processing complexity and cost due to the additional attachment process. Summary of the Invention

[0005] One embodiment of this disclosure aims to provide an organic light-emitting display device with a touch sensor and a method for manufacturing the same, which substantially eliminates one or more problems caused by the limitations and disadvantages of the prior art.

[0006] The purpose of at least one embodiment of this disclosure is to provide an organic light-emitting display device with a touch sensor and a method for manufacturing the same, so as to simplify the manufacturing process and reduce manufacturing costs.

[0007] Additional advantages and features of this disclosure will be set forth in part in the description which follows, and will also be apparent in part to those skilled in the art upon review of the narrator or may be learned by practice of the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures specifically pointed out in the draft specification and its claims and drawings.

[0008] In one embodiment, an organic light-emitting display device with a touch sensor eliminates the need for additional bonding processes by directly forming a touch sensor and a color filter, including touch sensing lines and touch driving lines, on the encapsulation layer covering the light-emitting device, thereby simplifying the manufacturing process and reducing manufacturing costs.

[0009] It should be understood that both the above brief description and the following detailed description of this disclosure are exemplary and illustrative, and are intended to provide a further explanation of the claimed disclosure.

[0010] In one embodiment, a display device includes at least one light-emitting device located on a substrate. An encapsulation layer is located on the at least one light-emitting device. An insulating layer is located between the substrate and the encapsulation layer. A touch sensor is located on the encapsulation layer. The touch sensor has touch sensing lines and touch driving lines that intersect each other. Touch pads are electrically connected to the touch sensor and are in contact with the insulating layer.

[0011] In one embodiment, a display device includes at least one light-emitting device located on a substrate. An encapsulation layer is located on the at least one light-emitting device. A touch sensor is located on the encapsulation layer. The touch sensor has touch sensing lines and touch driving lines that intersect each other. Routing lines are electrically connected to the touch sensor. The routing lines cover the side surface of the encapsulation layer. Attached Figure Description

[0012] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings:

[0013] Figure 1 This is a perspective view illustrating an organic light-emitting display device with a touch sensor according to a first embodiment of the present disclosure;

[0014] Figure 2 This is an example Figure 1 A plan view of an organic light-emitting display device with a touch sensor shown;

[0015] Figure 3 This is an example along Figure 1 Cross-sectional view of an organic light-emitting display device with a touch sensor, taken from lines II and II-II in the diagram;

[0016] Figure 4 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a second embodiment of the present disclosure;

[0017] Figure 5This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a third embodiment of the present disclosure;

[0018] Figure 6 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a fourth embodiment of the present disclosure;

[0019] Figure 7 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a fifth embodiment of the present disclosure;

[0020] Figure 8A , Figure 8B , Figure 8C and Figure 8D This is an example of manufacturing. Figure 4 A cross-sectional view of the method for using an organic light-emitting display device with a touch sensor, as shown; and

[0021] Figure 9 This is a cross-sectional view illustrating a touch electrode and bridge according to another embodiment of the present disclosure. Detailed Implementation

[0022] Referring now to preferred embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or similar components.

[0023] It will be understood that when an element is referred to as being "connected to" or "linked to" another element, it can be not only "directly connected or linked to" the other element, but also "indirectly connected or linked to" the other element via an "intermediate" element. In the same context, it will be understood that when an element is referred to as being "on" or "below" another element, it can not only be directly on or below the other element, but also indirectly on or below the other element via an intermediate element.

[0024] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0025] Figure 1 and Figure 2 These are, respectively, a perspective view and a plan view illustrating an organic light-emitting display device with a touch sensor according to a first embodiment of the present disclosure.

[0026] Figure 1 and Figure 2The OLED display device with touch sensor illustrated herein detects changes in mutual capacitance (Cm) during the touch period by means of a user's touch via touch electrodes 152e and 154e, thereby sensing the presence and location of a touch. Additionally, the OLED display device with touch sensor displays an image via unit pixels including light-emitting elements 120 during the display period. These unit pixels include red (R), green (G), and blue (B) sub-pixels (PXL), or red (R), green (G), blue (B), and white (W) sub-pixels (PXL).

[0027] to this end, Figure 1 The organic light-emitting display device shown includes a plurality of sub-pixels (PXLs) arranged in a matrix on a substrate 111, an encapsulation layer 140 disposed on the sub-pixels (PXLs), and a touch sensor and a color filter 192 disposed on the encapsulation layer 140. The color filter 192 may be a monochromatic filter layer including a red (R) portion, a green (G) portion, and a blue (B) portion.

[0028] Each sub-pixel (PXL) includes a pixel driving circuit and a light-emitting device 120 connected to the pixel driving circuit.

[0029] The pixel driving circuit includes a switching transistor (T1), a driving transistor (T2), and a storage capacitor (Cst).

[0030] When a scan pulse is supplied to the scan line (SL), the switching transistor (T1) is turned on, and the data signal supplied to the data line (DL) is supplied to the gate of the storage capacitor (Cst) and the drive transistor (T2).

[0031] In response to the data signal supplied to the gate of the driving transistor (T2), the driving transistor (T2) controls the current (I) supplied to the light-emitting device 120 from the high-voltage power supply (VDD) line, thereby adjusting the amount of light emitted by the light-emitting device 120. Furthermore, although the switching transistor (T1) is turned off, the driving transistor (T2) provides a predetermined current (I) through the voltage charged in the storage capacitor (Cst) until the data signal for the next frame is provided, thus maintaining the light emission of the light-emitting device 120.

[0032] like Figure 3 As illustrated, the driving transistor (T2) 130 includes a gate 132, a semiconductor layer 134 overlapping the gate 132 via a gate insulating layer 112, and a source 136 and a drain 138 formed on the protective insulating layer 114 and in contact with the semiconductor layer 134.

[0033] The light-emitting device 120 includes an anode 122, at least one light-emitting stack 124 formed on the anode 122, and a cathode 126 formed on the light-emitting stack 124. In one embodiment, the light-emitting device 120 is an organic light-emitting diode (OLED) that converts electrical energy into light.

[0034] Anode 122 is electrically connected to drain 138 in drive transistor 130, exposed through pixel contact holes passing through planarization layer 116. Light-emitting stacks 124 are formed on anode 122 within a light-emitting region provided by embankment 128. Each of at least one light-emitting stack 124 is formed by stacking a hole-dependent layer, an organic light-emitting layer, and an electron-dependent layer on anode 122 in a sequential or reverse order, generating white light incident on color filter 192. For example, light-emitting stacks 124 may include a first light-emitting stack and a second light-emitting stack facing each other via charge-generating layers. In this case, either the first or second light-emitting stack generates blue light, while the other light-emitting layers in the first and second light-emitting stacks generate yellow-green light, thus generating white light through the first and second light-emitting stacks. Cathode 126 faces anode 122 via light-emitting stacks 124.

[0035] Encapsulation layer 140 prevents external moisture or oxygen from penetrating into the light-emitting device 120, which is susceptible to its effects. For this purpose, encapsulation layer 140 includes multiple inorganic encapsulation layers 142 and 146 and an organic encapsulation layer 144 disposed between the inorganic encapsulation layers 142 and 146, wherein the inorganic encapsulation layer 142 is positioned as the uppermost layer. In this case, encapsulation layer 140 includes at least two inorganic encapsulation layers 142 and 146 and at least one organic encapsulation layer 144. An example of an encapsulation layer 140 having a structure in which the organic encapsulation layer 144 is disposed between the first inorganic encapsulation layer 142 and the second inorganic encapsulation layer 146 will be described.

[0036] A first inorganic encapsulation layer 142 is formed on a substrate 101 on which the cathode 126 is disposed, such that it is closest to the light-emitting device 120. The first inorganic encapsulation layer 142 is made of a material such as silicon nitride (SiN) that can be deposited at low temperatures. x ), silicon dioxide (SiO) x It is formed from inorganic insulating materials such as silicon oxynitride (SiON) or aluminum oxide (Al2O3). Therefore, since the first inorganic encapsulation layer 142 is deposited at a low temperature, it is possible to prevent damage to the organic light-emitting layer in the high-temperature-sensitive light-emitting stack 124 during the deposition of the first inorganic encapsulation layer 142.

[0037] The organic encapsulation layer 144 acts as a buffer to reduce the pressure between the corresponding layers caused by the bending of the organic light-emitting display device and improves flatness performance. The organic encapsulation layer 144 is formed using organic insulating materials such as acrylic resin, epoxy resin, polyimide, polyethylene, or silicon carbide (SiOC).

[0038] A second inorganic encapsulation layer 146 is formed on a substrate 111 on which an organic encapsulation layer 144 is disposed, such that it covers the upper and side surfaces of each of the organic encapsulation layer 144 and the first inorganic encapsulation layer 142. Therefore, the second inorganic encapsulation layer 146 minimizes or prevents external moisture or oxygen from penetrating into the first inorganic encapsulation layer 142 and the organic encapsulation layer 144. The second inorganic encapsulation layer 146 is made of materials such as silicon nitride (SiN). x ), silicon dioxide (SiO) x It is formed from inorganic insulating materials such as silicon oxynitride (SiON) or aluminum oxide (Al2O3).

[0039] Color filter 192 and touch sensor are disposed on encapsulation layer 140. Color filter 192 is located between encapsulation layer 140 and touch sensor (e.g., 152 and 154).

[0040] Color filter 192 is disposed directly on encapsulation layer 140, overlapping with the light-emitting area disposed through embankment 128. Therefore, white light generated in light-emitting device 120 is emitted through color filter 192 to achieve a color image. Furthermore, color filter 192 is formed using materials capable of being manufactured at low temperatures (approximately 100 degrees Celsius or lower) to protect the heat-sensitive light-emitting stack 124.

[0041] The color filter 192 is directly disposed on and in contact with the encapsulation layer 140 covering the light-emitting device 120. In this case, since the color filter 192 and the light-emitting device 120 are disposed on the same substrate 111, no additional bonding process is required, thus simplifying the overall process and reducing manufacturing costs. On the other hand, since the related organic light-emitting display device has a structure in which the color filter 192 and the light-emitting device 120 are disposed on different substrates, it requires a process of bonding the substrate on which the color filter 192 is disposed to the substrate on which the light-emitting device 120 is disposed, thus causing problems of increased processing complexity and manufacturing costs.

[0042] Therefore, a black background 194 is disposed between the respective sub-pixel regions of the color filter 192 according to the present disclosure to separate the corresponding sub-pixel regions and prevent light interference and light leakage between adjacent sub-pixel regions. In this case, the black background 194 overlaps with the embankment 128 between the sub-pixel regions. The black background 194 is formed using a high-resistivity black insulating material, or it is formed by stacking at least two of the red (R), green (G), and blue (B) color filters 192.

[0043] A touch sensor comprising multiple touch sensing lines 154 and touch driving lines 152 intersecting each other via a touch insulating layer 158 is disposed on a substrate 111 provided with a color filter 192 and a black background 194. For example, the touch sensing lines 154 and touch driving lines 152 are disposed on the color filter 192.

[0044] The touch drive line 152 includes a plurality of first touch electrodes 152e and a first bridge 152b for electrically connecting the first touch electrodes 152e to each other.

[0045] The first touch electrodes 152e are spaced apart from each other by a predetermined distance along the Y direction on the color filter 192 and the black background 194 or the color filter 192. Each first touch electrode 152e is electrically connected to an adjacent first touch electrode 152e via a first bridge 152b.

[0046] The first bridge 152b is disposed on the black background 194 and is electrically connected to the first touch electrode 152e without requiring additional contact holes.

[0047] The touch sensing line 154 includes a plurality of second touch electrodes 154e and a second bridge 154b for electrically connecting the second touch electrodes 154e to each other.

[0048] The second touch electrodes 154e are spaced apart from each other by a predetermined distance along the X direction on the color filter 192 and the black background 194 or the color filter 192. Each of the first touch electrodes 152e is electrically connected to the adjacent second touch electrode 154e via the second bridge 154b.

[0049] The second bridge 154b is formed on the touch insulating layer 158 and is electrically connected to the second touch electrode 154e exposed through the touch contact hole 150 passing through the touch insulating layer 158. Similar to the first bridge 152b, the second bridge 154b overlaps with the embankment 128, thus preventing a reduction in the aperture ratio through the first bridge 152b and the second bridge 154b.

[0050] Therefore, the touch sensing line 154 intersects with each other via the touch driving line 152 and the touch insulating layer 158 to form a mutual capacitance (Cm) at the intersection between the touch sensing line 154 and the touch driving line 152. The mutual capacitance (Cm) is charged by the touch driving pulse provided to the touch driving line 152 and releases the charge to the touch sensing line 154.

[0051] Furthermore, according to this disclosure, the touch driving line 152 and the touch sensing line 154 are electrically connected to the touch driving unit (not shown) via the routing line 156 and the touch pad 170, respectively.

[0052] Therefore, the routing line 156 sends touch driving pulses generated in the touch driving section to the touch driving line 152 via the touch pad 170, and sends touch sensing signals from the touch sensing line 154 to the touch pad 170. The routing line 156 is disposed between each of the first touch electrode 152e and the second touch electrode 154e and the touch pad 170, and is electrically connected to each of the first touch electrode 152e and the second touch electrode 154e, without requiring additional contact holes.

[0053] like Figure 2 As shown, the routing line 156 connected to the first touch electrode 152e extends along at least one of the upper and lower sides of the display area and is connected to the touch pad 170. The routing line 156 connected to the second touch electrode 154e extends along at least one of the left and right sides of the display area and is connected to the touch pad 170. Furthermore, the arrangement of the routing line 156 is not limited to... Figure 2 The structure shown is not the same as the one described above, but can be varied according to the design specifications of the display device.

[0054] like Figure 3 As shown, the routing line 156 is inclined downward at an angle toward the substrate 111 and the touch pad 170. The inclined portion of the routing line at least partially covers the side surface of the encapsulation layer 140 and is in direct contact with the side surface of the encapsulation layer 140. The routing line 156 also has a stepped shape that follows the shape of the underlying layer that the routing line 156 contacts.

[0055] The routing line 156 is formed into a single-layer or multi-layer structure using a first conductive layer such as Al, Ti, Cu, or Mo, which has excellent corrosion resistance, acid resistance, and conductivity. For example, the routing line is formed into a three-layer stacked structure such as Ti / Al / Ti or Mo / Al / Mo, or it is formed into a transparent conductive layer such as ITO or IZO, which has excellent corrosion resistance and acid resistance, and a non-transparent conductive layer such as Mo / Al / Mo, which has excellent conductivity.

[0056] Touch pad 170 is located in the non-display area of ​​the display device and is electrically connected to touch sensors (e.g., 154 and 152) via routing line 156. Touch pad 170 includes pad electrode 172 and pad cover electrode 174 formed on pad electrode 172 such that pad cover electrode 174 covers pad electrode 172. Pad electrode 172 is in direct contact with protective insulating layer 114. In some embodiments, pad electrode 172 may be in direct contact with gate insulating layer 112. Both gate insulating layer 112 and protective insulating layer 114 are located between substrate 111 and encapsulation layer 140.

[0057] The pad electrode 172 extends from the routing line 156 and is formed using the same material as the routing line 156. The pad cover electrode 174 is formed using the same material as the second bridge 154b and is configured to cover the pad electrode 172 exposed through the touch insulating layer 158. The pad cover electrode 174 is formed to be exposed through the touch blocking layer 176, allowing it to be connected to the touch driver.

[0058] Here, the touch blocking layer 176 is formed to cover the touch sensing line 154 and the touch driving line 152, thus preventing damage to the light-emitting device 120, the touch sensing line 154, and the touch driving line 152 due to external moisture or the like. The touch blocking layer 176 is formed by coating an organic insulating layer with an inorganic insulating layer. An optical film 178, such as a circular polarizer or a brightness-enhancing film (OLED transmissive controllable film, OTF), can be disposed on the touch blocking layer 176.

[0059] Therefore, the organic light-emitting display device according to the first embodiment of this disclosure has a structure in which touch electrodes 152e and 154e are formed on the encapsulation layer 140 during the manufacturing of the display device. Therefore, compared to related organic light-emitting display devices where the touchscreen is attached to the organic light-emitting display device by adhesive, the embodiment of this disclosure does not require adhesive processing, thus simplifying the manufacturing process and reducing manufacturing costs.

[0060] Figure 3 All the layers shown are formed on a single substrate 111. In one embodiment, substrate 111 may be the only substrate in the display device.

[0061] Figure 4 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a second embodiment of the present disclosure.

[0062] In addition to the organic light-emitting display device, it also includes a touch buffer layer 166 placed between each of the color filters 192 and the black background 194 and the touch electrodes 152e and 154e. Figure 4 The organic light-emitting display device with touch sensor illustrated in the image also includes... Figure 3 The organic light-emitting display devices illustrated herein use the same components. Therefore, a detailed description of the same components will be omitted.

[0063] A touch buffer layer 166 is formed on the color filter 192 and the black base 194 to cover the color filter 192 and the black base 194. A first touch electrode 152e, a second touch electrode 154e, and a first bridge 152b are formed on the touch buffer layer 166. The position of the touch buffer layer 166 causes it to be located between the touch electrodes 152e and 154e and an underlying layer such as the color filter 192 and the encapsulation layer 140.

[0064] In this configuration, the touch buffer layer 166 is formed with a thickness of approximately 500 Å to 5 µm, and the distance between each of the touch sensing lines 154 and touch driving lines 152 and the cathode 126 is maintained at 5 µm or greater. Therefore, the capacitance of the parasitic capacitor formed between each of the touch sensing lines 154 and touch driving lines 152 and the cathode 126 can be minimized, thus preventing the mutual capacitance effect caused by capacitive coupling between each of the touch sensing lines 154 and touch driving lines 152 and the cathode 126. Furthermore, when the distance between each of the touch sensing lines 154 and touch driving lines 152 and the cathode 126 is less than 5 µm, the touch performance degrades due to the mutual capacitance effect caused by capacitive coupling between each of the touch sensing lines 154 and touch driving lines 152 and the cathode 126.

[0065] Additionally, the touch buffer layer 166 prevents the penetration of reagents (such as developing solutions or etching solutions) used to manufacture the touch sensing lines 154 and touch driving lines 152, or prevents external moisture from penetrating into the light-emitting stack 124. Therefore, the light-emitting stack 124, which is susceptible to reagents or moisture, is protected by the touch buffer layer 166, and damage to the light-emitting stack 124 can be prevented.

[0066] To prevent damage to the heat-sensitive light-emitting stack 124, the touch buffer layer 166 can be formed using an organic insulating material that can be formed at temperatures of 100 degrees Celsius or lower and has a low dielectric constant of 1 to 3. For example, the touch buffer layer 166 is formed using acrylic, epoxy, or silane materials. The touch buffer layer 166 prevents damage to the corresponding encapsulation layers 142, 144, and 146 inside the encapsulation layer 140 caused by bending of the organic light-emitting display device, and also prevents damage to the touch sensing lines 154 and touch driving lines 152 formed on the touch buffer layer 166. The touch buffer layer 166 also serves as a planarization layer.

[0067] Furthermore, the routing line 156 at least partially covers both the side surface of the encapsulation layer 140 and the side surface of the touch buffer layer 166. The inclined portion of the routing line 156 extends downward along the side surface of the touch buffer layer 166 and is in direct contact with the side surface of the touch buffer layer 166.

[0068] Therefore, the organic light-emitting display device with a touch sensor according to the second embodiment of the present invention has a structure in which touch electrodes 152e and 154e are formed on the encapsulation layer 140 during the manufacturing of the display device. Therefore, compared to conventional organic light-emitting display devices where the touch screen is attached to the organic light-emitting display device by adhesive, the embodiments of the present disclosure do not require adhesive processing, thus simplifying the manufacturing process and reducing manufacturing costs.

[0069] Furthermore, the organic light-emitting display device with a touch sensor according to the present invention has a structure in which a color filter 192 is formed on the encapsulation layer 140 during the manufacturing of the display device. Therefore, embodiments of the present disclosure do not require a sealant to bond separate substrates on which the color filter 192 and the touch sensor are disposed. This allows the display device to be made thinner.

[0070] Furthermore, the organic light-emitting display device with a touch sensor according to the second embodiment of the present invention can prevent damage to the light-emitting stack 124 by means of a touch buffer layer 166 placed between the color filter 192 and the touch electrode, and can also reduce the capacitance of the parasitic capacitor formed by the cathode 126 and the respective touch electrodes 152e and 154e.

[0071] Figure 5 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a third embodiment of the present disclosure.

[0072] In addition to the color filter 192 being formed on the touch electrodes 152e and 154e, Figure 5 The organic light-emitting display device illustrated herein also includes a... Figure 4 The organic light-emitting display devices illustrated herein use the same components. Therefore, detailed descriptions of these same components will be omitted.

[0073] Figure 5The color filter 192 and black background 194 illustrated cover the touch sensor. That is, the touch sensing line 154 and touch driving line 152 included in the touch sensor are disposed between the color filter 192 and the encapsulation layer 140. In this case, the color filter 192 and black background 194, positioned higher than the touch sensor, absorb external light incident from the outside of the organic light-emitting display device into its interior. Specifically, external light is prevented from being reflected through conductive layers (e.g., bridges 152b and 154b, anode 122, gate 132, source 136, and drain 138) formed using a highly reflective metal included in the touch sensor, light-emitting device 120, and driving transistor 130, and thus visibility reduction due to external light is prevented. Therefore, even without an additional circular polarizer, Figure 5 The organic light-emitting display device shown can also prevent reduced visibility due to external light, and thus reduce costs by eliminating the circular polarizer.

[0074] Additionally, a touch buffer layer 166 is formed on a substrate 111 on which the color filter 192 and the black base 194 are provided. The touch buffer layer 166 is formed using an organic insulating material such as acrylic resin, epoxy resin, polyimide, polyethylene, or silicon carbide (SiOC). The touch buffer layer 166, formed using an organic insulating material, flattens the substrate 111 on which the color filter 192 and the black base 194 are provided, thereby improving the adhesion of the touch blocking layer 176 and the optical film 178 to the touch buffer layer 166.

[0075] Therefore, the organic light-emitting display device with touch sensors according to the third embodiment of this disclosure has a structure in which touch electrodes 152e and 154e are directly disposed on the encapsulation layer 140. Therefore, compared to conventional organic light-emitting display devices where the touch screen is attached to the organic light-emitting display device by adhesive, the embodiments of this disclosure do not require adhesive processing, thus simplifying the manufacturing process and reducing manufacturing costs.

[0076] Furthermore, the organic light-emitting display device with a touch sensor according to this disclosure absorbs light through a color filter 192 covering the light-emitting device 120 and the touch sensor, and a black background 194, thus preventing reduced visibility due to external light.

[0077] Figure 6 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a fourth embodiment of the present disclosure.

[0078] In addition to at least one of the black base 194 and the color filter 192 being used as a touch insulating layer, Figure 6 The organic light-emitting display device illustrated herein also includes a... Figure 4The organic light-emitting display devices illustrated herein use the same components. Therefore, a detailed description of the same components will be omitted.

[0079] Figure 6 The touch sensing line 154 and touch driving line 152 of the illustrated organic light-emitting display device intersect each other via at least one of the color filter 192 and the black background 194. Therefore, a first bridge 152b and a first touch electrode 154e of the touch driving line 152 and a second touch electrode 154e of the touch sensing line 154 are formed on the encapsulation layer 140, and a second bridge 154b is formed on the color filter 192 and the black background 194. The second bridge 154b is electrically connected to the second touch electrode 154e exposed through a touch contact hole 150 passing through the black background 194. Thus, the first bridge 152b and the second bridge 154b are insulated from the black background 194 without requiring an additional insulating layer, thereby achieving a thin film, eliminating the need for a touch insulating layer manufacturing process, simplifying the overall process, and reducing manufacturing costs.

[0080] Furthermore, despite Figure 6 An example is shown where the touch contact hole 150 passes through the black background 194; however, depending on the design specifications of the display device, the touch contact hole 150 may pass through the color filter 192 or through both the color filter 192 and the black background 194.

[0081] Figure 7 This is a cross-sectional view illustrating an organic light-emitting display device with a touch sensor according to a fifth embodiment of the present disclosure.

[0082] Except for omitting the touch blocking layer 176 and providing the blocking film layer 160, Figure 7 The organic light-emitting display device illustrated herein also includes a... Figure 6 The organic light-emitting display devices illustrated herein use the same components. Therefore, a detailed description of the same components will be omitted.

[0083] The barrier film layer 160 is formed between the uppermost layer of the encapsulation layer 140 and the touch electrodes 152e and 154e (not shown), or is formed between the light-emitting device 120 and the lowermost layer of the encapsulation layer 140. Figure 7 (as shown in the diagram). For example, a barrier film layer 160 is formed between the cathode 126 and the first inorganic encapsulation layer 142, which is configured as the lowest layer of the encapsulation layer 140. The barrier film layer 160 is formed as an inorganic layer that can be formed by atomic layer deposition (ALD) at low temperature, and is made using materials such as silicon nitride (SiN). x ), silicon dioxide (SiO) xIt is formed from inorganic insulating materials such as silicon oxynitride (SiON) or aluminum oxide (Al2O3). Therefore, the barrier film layer 160 prevents external moisture or oxygen from penetrating into the light-emitting device 120, which is susceptible to external moisture or oxygen, thus eliminating the need for an additional touch barrier layer. In addition, the barrier film layer 160 is formed by low-temperature deposition, thus preventing damage to the light-emitting stack 124, which is susceptible to high temperatures.

[0084] Figures 8A to 8D This is a cross-sectional view illustrating a method for manufacturing an organic light-emitting display device with a touch sensor according to the first to fifth embodiments of this disclosure. Here, it will be used as an example... Figure 4 The structure illustrated in the second embodiment of this disclosure is described below.

[0085] Reference Figure 8A Routing lines 156 and pad electrodes 172 are formed on a substrate 111 which is provided with a switching transistor, a driving transistor 130, a light-emitting device 120, an encapsulation layer 140, a black base 194, a color filter 192 and a touch buffer layer 166.

[0086] Specifically, at room temperature, a first conductive layer is deposited on the entire surface of a substrate 111, which is provided with a switching transistor, a driving transistor, a light-emitting device 120, a package layer 140, a black base 194, a color filter 192, and a touch buffer layer 166, using sputtering deposition. The first conductive layer is then patterned by photolithography and etching to form routing lines 156 and pad electrodes 172. Here, the first conductive layer is formed as a single layer or multiple layers using a metal with excellent corrosion resistance and acid resistance, such as Al, Ti, Cu, or Mo. For example, the first conductive layer is formed as a three-layer stacked structure such as Ti / Al / Ti or Mo / Al / Mo.

[0087] Reference Figure 8B A first touch electrode 152e, a second touch electrode 154e, and a first bridge 152b are formed on a substrate 111 provided with routing lines 156 and pad electrodes 172.

[0088] Specifically, a second conductive layer is deposited on the entire surface of the substrate 111, on which the routing line 156 and the pad electrode 172 are provided. Here, when a transparent conductive layer such as ITO or IZO is used as the second conductive layer, the transparent conductive layer is formed at room temperature by deposition such as sputtering. Then, the second conductive layer is patterned by photolithography and etching to form the first touch electrode 152e, the second touch electrode 154e, and the first bridge 152b.

[0089] Reference Figure 8CA touch insulating layer 158 with touch contact holes 150 is formed on a substrate 111 provided with a first touch electrode 152e, a second touch electrode 154e and a first bridge 152b.

[0090] Specifically, a touch insulating layer 158 with a thickness of 500 Å to 5 µm is formed on a substrate 111 on which a first touch electrode 152e, a second touch electrode 154e, and a first bridge 152b are disposed. Here, when an organic layer is used as the touch insulating layer 158, the organic layer is coated onto the substrate and then cured at a temperature of 100 degrees Celsius or lower to form the touch insulating layer 158. When an inorganic layer is used as the touch insulating layer 158, at least two low-temperature CVD deposition and washing processes are repeated to form a touch insulating layer 158 with a multilayer structure. Then, the touch insulating layer 158 is patterned by photolithography and etching to form touch contact holes 150.

[0091] Reference Figure 8D A second bridge 154b and a pad-covered electrode 174 are formed on a substrate 111 having a touch insulating layer 158 with a touch contact hole 150.

[0092] Specifically, a third conductive layer is formed on a substrate 111 having a touch insulating layer 158 with touch contact holes 150. Here, when a transparent conductive layer such as ITO or IZO, or a metal with excellent corrosion and acid resistance such as Al, Ti, Cu, or Mo, is used as the third conductive layer, it is formed at room temperature by deposition such as sputtering. Then, the third conductive layer is patterned by photolithography and etching to form a second bridge 154b and a pad cover electrode 174. Finally, a touch blocking layer 176 and an optical film 178 are attached to the substrate 111 having the second bridge 154b and the pad cover electrode 174.

[0093] Figure 9 These are plan and cross-sectional views illustrating an organic light-emitting display device with a touch sensor according to a sixth embodiment of the present invention.

[0094] Apart from the changes in the construction of the first touch electrode 152e and the second touch electrode 154e, Figure 9 The organic light-emitting display device illustrated herein also includes a... Figures 3 to 7 The organic light-emitting display devices illustrated herein use the same components. Therefore, a detailed description of the same components will be omitted.

[0095] Figure 9Some layers of the first touch electrode 152e and the second touch electrode 154e illustrated herein can be formed with a grid shape. That is, the first touch electrode 152e and the second touch electrode 154e include a transparent conductive layer 1541 and a grid metal layer 1542 having a grid-shaped pattern. The grid metal layer 1542 is located on or below the transparent conductive layer 1541. The grid metal layer 1542 is formed using the same material as the routing line 156 through the same masking process as the routing line 156. Therefore, the grid metal layer 1542 prevents complexity in the manufacturing process and increases manufacturing costs.

[0096] Furthermore, touch electrodes 152e and 154e may consist solely of a mesh metal layer 1542 without the need for a transparent conductive layer 1541, or they may be formed of a mesh-like transparent conductive layer 1541 without the need for a mesh metal layer 1542. Here, the mesh metal layer 1542 may comprise touch electrodes 152e and 154e, which serve as low-resistance electrodes due to their superior conductivity compared to the transparent conductive layer 1541. Specifically, when the transparent conductive layer 1541 is formed at a low temperature (approximately 100 degrees Celsius or lower) to protect the heat-sensitive light-emitting stack 124, the transparent conductive layer 1541 cannot achieve high transparency and low resistance. In this case, it is possible to reduce the resistance of touch electrodes 152e and 154e by using a highly conductive mesh metal layer 1542 while simultaneously improving light transmittance by forming a transparent conductive layer 1541 with a small thickness.

[0097] Therefore, by reducing the resistance and capacitance of the touch electrodes 152e and 154e, touch sensitivity can be improved, and thus the RC time constant can be reduced. Furthermore, the reduction in aperture ratio and light transmittance caused by the very small linewidth of the mesh metal layer 1542 can be prevented.

[0098] In addition, such as Figure 9 As shown, the bridge 154b, disposed in a plane different from the touch electrodes 152e and 154e, includes a plurality of slits 151. Therefore, the area of ​​the bridge 154b including slits 151 is reduced compared to a bridge 154b without slits 151. Some slits 151 overlap with the bridge 152b. Therefore, the reflection of external light can be reduced due to the bridge 154b, thus preventing a decrease in visibility. The bridge 154b including slits 151 is formed as a transparent conductive layer or a non-transparent conductive layer. When the bridge 154b is formed as a non-transparent conductive layer, the bridge 154b overlaps with the embankment 128, thus preventing a decrease in the aperture ratio.

[0099] exist Figure 9In this embodiment, the display device has a structure in which the bridge 154b of the touch sensing line 154 and the second touch electrode 154e are disposed in different planes and connected through a touch contact hole 150. In this case, the method for manufacturing an organic light-emitting display device with a touch sensor according to this disclosure is as follows: The second bridge 154b is formed by a first mask process; a touch insulating layer with a touch contact hole 150 is formed by a second mask process; routing lines and a mesh metal layer are formed by a third mask process; and the first bridge 152b, the first touch electrode 152e, and the second touch electrode 154e are formed by a fourth mask process. In other embodiments, the bridge 152b of the touch driving line 152 and the first touch electrode 152e may be disposed in different planes and connected through a touch contact hole 150.

[0100] As is evident from the foregoing, the organic light-emitting display device with a touch sensor according to the embodiments of the present disclosure has a structure in which touch electrodes are formed on an encapsulation layer. Therefore, compared to conventional organic light-emitting display devices where the touchscreen is attached to the organic light-emitting display device via adhesive, the embodiments of the present disclosure do not require bonding processing, thus simplifying the manufacturing process, reducing manufacturing costs, making the display device easier to fold, and improving resolution and aperture ratio.

[0101] Furthermore, the organic light-emitting display device with a touch sensor according to embodiments of the present disclosure has a structure in which a color filter is formed on an encapsulation layer. Therefore, embodiments of the present disclosure do not require bonding processing, thus simplifying the manufacturing process, reducing manufacturing costs, making the display device easier to fold, and improving resolution and aperture ratio.

[0102] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from the spirit or scope thereof. Therefore, this invention is intended to cover any modifications and variations falling within the scope of the appended claims and their equivalents.

[0103] Cross-reference to related applications

[0104] This application claims the benefit of Korean Patent Application No. 10-2016-0126761, filed on September 30, 2016, which is incorporated herein by reference as if fully set forth herein.

Claims

1. A display device, the display device comprising: A light-emitting device, wherein the light-emitting device is disposed on a substrate; A embankment, the embankment being configured to define the light-emitting area of ​​the light-emitting device; A packaging unit, wherein the packaging unit is disposed on the light-emitting device, the packaging unit comprising: A first inorganic encapsulation layer, wherein the first inorganic encapsulation layer is set as the bottom layer of the encapsulation unit. The second inorganic encapsulation layer, which is set as the uppermost layer of the encapsulation unit, and An organic encapsulation layer is inserted between the first inorganic encapsulation layer and the second inorganic encapsulation layer; A plurality of first touch electrodes, the plurality of first touch electrodes being arranged in a first direction; A plurality of second touch electrodes are arranged in a second direction intersecting the first direction; A first bridge, configured to interconnect the first touch electrodes; A second bridge, configured to interconnect the second touch electrodes; Multiple routing lines are connected to the first touch electrode or the second touch electrode and are arranged along the side of the packaging unit. Each of the second bridges has a first end, a second end opposite to the first end, and a plurality of openings between the first end and the second end. Each of the first end and the second end is in contact with a corresponding second touch electrode in the second touch electrode. The plurality of openings penetrate a corresponding second bridge and are spaced apart from each other between the first end and the second end along the longitudinal direction of the corresponding second bridge. The second bridge overlaps with the embankment.

2. The display device according to claim 1, in, The plurality of openings are linearly arranged in the second direction, and each of the plurality of openings is longer in the first direction than in the second direction.

3. The display device according to claim 1, further comprising: A touch dielectric film is disposed between the first bridge and the second bridge, wherein... The first touch electrode, the second touch electrode, and the first bridge are disposed on either the packaging unit or the touch dielectric film. The second bridge is disposed on the other of the packaging unit and the touch dielectric film, and The second bridge is connected to the second touch electrode exposed through a touch contact hole formed through the touch dielectric film.

4. The display device according to claim 3, wherein, At least one of the first bridge, the second bridge, the first touch electrode, and the second touch electrode is configured to have a structure having multiple conductive films stacked on top of each other. Wherein, at least one of the conductive films is configured to have a multilayer structure, and The at least one of the conductive films is configured to have a multilayer structure including one of Al, Ti, Cu, Mo, ITO and IZO.

5. The display device according to claim 1, wherein, At least one of the first bridge, the second bridge, the first touch electrode, and the second touch electrode is configured to have a structure with multiple conductive films stacked on top of each other. Wherein, at least one of the plurality of conductive films includes at least one of Ti / Al / Ti and Mo / Al / Mo.

6. The display device according to claim 1, wherein, At least one of the first touch electrode, the second touch electrode, the first bridge, and the second bridge includes a grid-shaped conductive film with openings formed in the grid-shaped conductive film.

7. The display device according to claim 6, wherein, The grid-shaped conductive film overlaps with the embankment, and The grid-shaped conductive film is arranged along the embankment.

8. The display device according to claim 7, wherein, The embankment is configured such that the openings formed in the grid-shaped conductive film have a diamond shape.

9. The display device according to claim 1, further comprising: A touch buffer film is disposed between the encapsulation unit and the first touch electrode and between the encapsulation unit and the second touch electrode.

10. The display device according to claim 9, wherein, The routing lines are formed along the side surface of the touch buffer film.

11. The display device according to claim 1, wherein, The routing line is configured to have a structure with multiple routing layers stacked together, the multiple routing layers including a lower routing layer and an upper routing layer.

12. The display device according to claim 1, further comprising: Multiple touch pads, the multiple touch pads being connected to the routing line, The plurality of touch pads are configured to have a structure with multiple pad layers stacked on top of each other. At least one of the pad layers is disposed on the same layer and is made of the same material as at least one of the first bridge and the second bridge.

13. The display device according to claim 12, wherein, The at least one of the pad layers includes one of Ti / Al / Ti and Mo / Al / Mo.

14. The display device according to claim 12, further comprising: A thin-film transistor connected to the light-emitting device; A gate dielectric film is disposed on the gate of the thin-film transistor and the active layer of the thin-film transistor; A passivation film is disposed between the source of the thin-film transistor and the active layer and between the drain of the thin-film transistor and the active layer; as well as A leveling layer is disposed on the source and the drain.

15. The display device according to claim 14, wherein, The routing line and the touch pad located at the outer edge of the substrate are disposed on one of the gate dielectric film, the passivation film, and the planarization layer located between the light-emitting device and the substrate.

16. A display device comprising: A light-emitting device, wherein the light-emitting device is disposed on a substrate; A embankment, the embankment being configured to define the light-emitting area of ​​the light-emitting device; A packaging unit is disposed on the light-emitting device; A touch sensor, wherein the touch sensor is disposed on the packaging unit; A routing line, which is electrically connected to the touch sensor and is disposed along the side of the package unit; as well as A color filter, the color filter being on the touch sensor, The sensor includes a plurality of first touch electrodes arranged in a first direction, a plurality of second touch electrodes arranged in a second direction intersecting the first direction, a first bridge configured to interconnect the first touch electrodes, and a second bridge configured to interconnect the second touch electrodes. Each of the second bridges has a first end, a second end opposite to the first end, and a plurality of openings between the first end and the second end. Each of the first end and the second end is in contact with a corresponding second touch electrode in the second touch electrode. The plurality of openings penetrate a corresponding second bridge and are spaced apart from each other between the first end and the second end along the longitudinal direction of the corresponding second bridge. The second bridge overlaps with the embankment.

17. The display device according to claim 16, further comprising: A touch buffer layer is disposed on the color filter.

18. The display device according to claim 16, wherein, The plurality of openings are linearly arranged in the second direction, and each of the plurality of openings is longer in the first direction than in the second direction.

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