KR20230103933A - Touch panel and display device including the same - Google Patents

Abstract

A touch panel according to an embodiment of the present invention includes a touch pattern layer having a plurality of elongated patterns and a touch electrode layer disposed on the touch pattern layer and having a plurality of touch electrodes, and each of the plurality of elongated patterns includes a plurality of elongated patterns. It is composed of a unit pattern of, each of a plurality of touch electrodes is composed of a plurality of unit electrodes, each of the plurality of unit patterns is disposed inside the first sub-unit pattern and the first sub-unit overlapping the plurality of unit electrode electrodes Including the second sub-unit pattern, laser lift off (LLO) process efficiency for the touch panel may be increased.

Description

Touch panel and display device including the same {TOUCH PANEL AND DISPLAY DEVICE INCLUDING THE SAME}

The present invention relates to a touch panel and a display device including the same, and more particularly, to a stretchable touch panel and a display device including the same.

Display devices used in computer monitors, TVs, mobile phones, etc. include Organic Light Emitting Displays (OLEDs) that emit light by themselves, and Liquid Crystal Displays (LCDs) that require a separate light source. there is.

The range of applications of display devices is diversifying from computer monitors and TVs to personal portable devices, and research into display devices having a reduced volume and weight while having a large display area is being conducted.

In addition, recently, a display device manufactured to be stretchable in a specific direction and changeable into various shapes by forming a display unit and wires on a flexible substrate such as plastic, which is a flexible material, is attracting attention as a next-generation display device. there is.

An object to be solved by the present invention is to provide a touch panel including stretchable touch electrodes and a display device including the same.

Another problem to be solved by the present invention is to provide a touch panel capable of promoting process stability and a display device including the touch panel.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, the touch panel according to an embodiment of the present invention includes a touch pattern layer having a plurality of stretch patterns and a touch electrode layer disposed on the touch pattern layer and having a plurality of touch electrodes. wherein each of the plurality of stretching patterns is composed of a plurality of unit patterns, each of the plurality of touch electrodes is composed of a plurality of unit electrodes, and each of the plurality of unit patterns is composed of a plurality of unit electrode electrodes and overlaps with the first sub unit By including the pattern and the second sub-unit pattern disposed inside the first sub-unit, laser lift off (LLO) process efficiency for the touch panel may be increased.

Other embodiment specifics are included in the detailed description and drawings.

In the present invention, by disposing the touch pattern under the touch electrode, the stretching reliability of the touch panel can be improved.

In the present invention, by disposing additional touch patterns, the efficiency of a laser lift off (LLO) process for a touch panel can be increased.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present invention.

1 is a cross-sectional view of a display device according to an exemplary embodiment of the present invention.
2 is a plan view of a display panel of a display device according to an exemplary embodiment of the present invention.
FIG. 3 is an enlarged plan view of area A shown in FIG. 2 .
FIG. 4 is a cross-sectional view taken along the cutting line III-III′ shown in FIG. 3 .
FIG. 5 is a cross-sectional view taken along the cutting line IV-IV′ shown in FIG. 3 .
FIG. 6 is a cross-sectional view taken along the cutting line V-V′ shown in FIG. 3 .
7 is a circuit diagram of a sub-pixel of a display panel of a display device according to an exemplary embodiment of the present invention.
8 is a plan view of a touch panel of a display device according to an exemplary embodiment.
FIG. 9A is an enlarged plan view of area B shown in FIG. 8 .
FIG. 9B is a cross-sectional view taken along the cutting line IX-IX' shown in FIG. 9A.
10A is a cross-sectional view illustrating a laser lift off (LLO) process of a conventional touch panel.
10B is a cross-sectional view illustrating a laser lift off (LLO) process of a touch panel of a display device according to an exemplary embodiment.
11A is an enlarged plan view of a touch panel of a display device according to another exemplary embodiment of the present invention.
FIG. 11B is a cross-sectional view taken along the line XI-XI' shown in FIG. 11A.
12A is an enlarged plan view of a touch panel of a display device according to another embodiment (third embodiment) of the present invention.
FIG. 12B is a cross-sectional view taken along the cutting line XII-XII' shown in FIG. 12A.
13A is an enlarged plan view of a touch panel of a display device according to another embodiment (fourth embodiment) of the present invention.
FIG. 13B is a cross-sectional view taken along the cutting line XIII-XIII′ shown in FIG. 13A.
14A is an enlarged plan view of a touch panel of a display device according to another embodiment (fifth embodiment) of the present invention.
FIG. 14B is a cross-sectional view taken along the cutting lines A-A', BB', and C-C' shown in FIG. 14A.
15A to 15E are process charts for explaining a method of manufacturing a touch panel of a display device according to another embodiment (fifth embodiment) of the present invention.
16A is an enlarged plan view of a touch panel of a display device according to another embodiment (sixth embodiment) of the present invention.
FIG. 16B is a cross-sectional view taken along the cutting lines A-A', BB', and C-C' shown in FIG. 16A.
17A to 17E are process charts for explaining a method of manufacturing a touch panel of a display device according to another embodiment (sixth embodiment) of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different shapes, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person who has the scope of the invention.

The shapes, areas, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, and the present invention is not limited thereto. Like reference numbers designate like elements throughout the specification. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists', etc. mentioned in the present invention is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

When an element or layer is referred to as “on” another element or layer, it includes all cases where another element or layer is directly on top of another element or another layer or other element intervenes therebetween.

And, when it is described as 'connection' or 'connection', unless 'immediately' or 'directly' is used, it may include being 'connected' or 'connected' through one or more other components located between two components. can

In addition, although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

Like reference numbers designate like elements throughout the specification.

The area and thickness of each component shown in the drawings is shown for convenience of description, and the present invention is not necessarily limited to the area and thickness of the illustrated component.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship. may be

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A display device according to an exemplary embodiment of the present invention is a display device capable of displaying an image even when bent or stretched, and may also be referred to as a stretchable display device, a stretchable display device, and a stretchable display device. The display device may have high flexibility and stretchability compared to conventional general display devices. Accordingly, not only can the user bend or stretch the display device, but also the shape of the display device can be freely changed according to the user's manipulation. For example, when the user grabs the end of the display device and pulls it, the display device may stretch in the direction the user pulls it. Alternatively, when a user places the display device on an uneven outer surface, the display device may be disposed to be bent along the shape of the outer surface of the wall. Also, when the force applied by the user is removed, the display device may be restored to its original shape.

<Laminate structure of touch panel and display panel>

1 is a cross-sectional view of a display device according to an exemplary embodiment of the present invention.

As shown in FIG. 1 , a display device according to an exemplary embodiment of the present invention may include an extensible display panel 100 , an extensible touch panel 200 , and an adhesive layer 300 .

The display panel 100 can display an image while being stretchable. Also, the display panel 100 may include a lower substrate 111 , a pattern layer 120 , a plurality of transistors 150 and 160 , an LED 170 , and an upper substrate 112 that are sequentially stacked. Accordingly, as the LED 170 disposed on the pattern layer 120 is controlled by the plurality of transistors 150 and 160, an image may be displayed.

Also, the touch panel 200 is disposed on the display panel 100 and can sense a touch while being stretchable. The touch panel 200 may include a touch pattern layer 210 , a touch electrode layer 220 , and a touch substrate 230 sequentially stacked.

Accordingly, a change in mutual capacitance or self capacitance between components of the touch electrode layer 220 disposed on the touch pattern layer 210 may be sensed to determine a touch by a finger or a pen.

Also, the adhesive layer 300 serves to bond the display panel 100 and the touch panel 200 together. Accordingly, the adhesive layer 300 may be composed of an adhesive material disposed between the display panel 100 and the touch panel 200 . Specifically, the adhesive layer 300 may be an optically clear adhesive (OCA), and may be composed of an acrylic adhesive, a silicone adhesive, a urethane adhesive, and the like.

As shown in FIG. 1 , the touch panel 200 disposed on the display panel 100 is shown as an add-on type. However, the touch panel 200 may be disposed below the display panel 100 or may be disposed inside the display panel 100 .

Hereinafter, a display panel of a display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6 .

<Stretchable substrate and pattern layer>

2 is a plan view of a display panel of a display device according to an exemplary embodiment of the present invention.

FIG. 3 is an enlarged plan view of area A shown in FIG. 2 .

FIG. 4 is a cross-sectional view taken along the cutting line III-III′ shown in FIG. 3 .

Referring to FIG. 2 , the display panel 100 according to an exemplary embodiment includes a lower substrate 111, a pattern layer 120, a plurality of pixels PX, a gate driver GD, and a data driver DD. and a power supply (PS). Also, referring to FIG. 2 , the display panel 100 according to an exemplary embodiment may further include a first filling layer 190 and an upper substrate 112 .

The lower substrate 111 is a substrate for supporting and protecting various components of the display panel 100 . Also, the upper substrate 112 is a substrate for covering and protecting various components of the display panel 100 . That is, the lower substrate 111 is a substrate supporting the pattern layer 120 on which the pixel PX, the gate driver GD, and the power supply PS are formed. Also, the upper substrate 112 is a substrate covering the pixel PX, the gate driver GD, and the power supply PS.

Each of the lower substrate 111 and the upper substrate 112 is a flexible substrate and may be made of an insulating material capable of being bent or stretched. For example, each of the lower substrate 111 and the upper substrate 112 is made of silicone rubber such as polydimethylsiloxane (PDMS), or elastic materials such as polyurethane (PU) and PTFE (polytetrafluoroethylene). It is made of a polymer (elastomer), and thus may have a flexible property. In addition, the material of the lower substrate 111 and the upper substrate 112 may be the same, but may be variously modified without being limited thereto.

Each of the lower substrate 111 and the upper substrate 112 is a flexible substrate, and may reversibly expand and contract. Accordingly, the lower substrate 111 includes a lower stretchable substrate, a lower stretchable substrate, a lower stretched substrate, a lower flexible substrate, a lower flexible substrate, a first stretchable substrate, a first stretchable substrate, a first stretchable substrate, and a first stretchable substrate. It may also be referred to as a flexible substrate or a first flexible substrate, and the upper substrate 112 includes an upper stretchable substrate, an upper stretchable substrate, an upper stretchable substrate, an upper flexible substrate, an upper flexible substrate, and a second stretchable substrate. , It may also be referred to as a second stretchable substrate, a second stretched substrate, a second flexible substrate, or a second flexible substrate. Also, the modulus of elasticity of the lower substrate 111 and the upper substrate 112 may be several MPa to several hundred MPa. Also, the ductile breaking rate of the lower substrate 111 and the upper substrate 112 may be 100% or more. Here, the ductile failure rate means the elongation rate at the time when the object to be stretched is destroyed or cracked. The thickness of the lower substrate may be 10um to 1mm, but is not limited thereto.

The lower substrate 111 may have an active area (AA) and a non-active area (NA) surrounding the display area (AA). However, the display area AA and the non-active area NA are not limited to the lower substrate 111 but may be referred to throughout the display device.

The display area AA is an area where an image is displayed on the display panel 100 . A plurality of pixels PX are disposed in the display area AA. Also, each pixel PX may include a display element and various driving elements for driving the display element. Various driving elements may mean at least one thin film transistor (TFT) and a capacitor, but are not limited thereto. Also, each of the plurality of pixels PX may be connected to various wires. For example, each of the plurality of pixels PX may be connected to various wires such as a gate wire, a data wire, a high potential voltage wire, a low potential voltage wire, a reference voltage wire, and an initialization voltage wire.

The non-display area NA is an area in which an image is not displayed. The non-display area NA may be disposed adjacent to the display area AA. For example, the non-display area NA may be an area surrounding the display area AA. However, it is not limited thereto, and the non-display area NA corresponds to an area of the lower substrate 111 excluding the display area AA, which may be deformed and separated into various shapes. Components for driving the plurality of pixels PX disposed in the display area AA are disposed in the non-display area NA. A gate driver GD and a power supply PS may be disposed in the non-display area NA. In addition, a plurality of pads connected to the gate driver GD and the data driver DD may be disposed in the non-display area NA, and each pad corresponds to each of the plurality of pixels PX of the display area AA. can be connected

On the lower substrate 111, a plurality of first plate patterns 121 and a plurality of first line patterns 122 disposed in the display area AA, and a plurality of first line patterns 122 disposed in the non-display area NA. A pattern layer 120 including a second plate pattern 123 and a plurality of second line patterns 124 is disposed.

The plurality of first plate patterns 121 are disposed in the display area AA of the lower substrate 111 , and a plurality of pixels PX are formed on the plurality of first plate patterns 121 . Also, the plurality of second plate patterns 123 may be disposed in the non-display area NA of the lower substrate 111 . Also, a gate driver GD and a power supply PS may be formed on the plurality of second plate patterns 123 .

The plurality of first plate patterns 121 and the plurality of second plate patterns 123 described above may be arranged in an island shape spaced apart from each other. Each of the plurality of first plate patterns 121 and the plurality of second plate patterns 123 may be individually separated. Accordingly, the plurality of first plate patterns 121 and the plurality of second plate patterns 123 may be a first island pattern and a second island pattern or a first individual pattern. ) and a second individual pattern.

Specifically, gate drivers GD may be mounted on the plurality of second plate patterns 123 . The gate driver GD may be formed on the second plate pattern 123 in a Gate In Panel (GIP) method when manufacturing various components on the first plate pattern 121 . Accordingly, various circuit configurations constituting the gate driver GD, such as various transistors, capacitors, and wires, may be disposed on the plurality of second plate patterns 123 . However, the gate driver GD is not limited thereto and may be mounted in a COF (Chip on Film) method.

In addition, the power supply PS may be mounted on the plurality of second plate patterns 123 . The power supply PS may be formed on the second plate pattern 123 as a plurality of power blocks patterned when manufacturing various components on the first plate pattern 121 . Accordingly, power blocks disposed on different layers may be disposed on the second plate pattern 123 . That is, a lower power block and an upper power block may be sequentially disposed on the second plate pattern 123 . Also, a low potential voltage may be applied to the lower power block, and a high potential voltage may be applied to the upper power block. Accordingly, the low potential voltage may be supplied to the plurality of pixels PX through the lower power block. Also, the high potential voltage may be supplied to the plurality of pixels PX through the upper power block.

Referring to FIG. 2 , the size of the plurality of second plate patterns 123 may be larger than that of the plurality of first plate patterns 121 . Specifically, the size of each of the plurality of second plate patterns 123 may be greater than that of each of the plurality of first plate patterns 121 . As described above, the gate driver GD may be disposed on each of the plurality of second plate patterns 123, and one stage of the gate driver GD may be disposed on each of the plurality of second plate patterns 123. . Accordingly, since the area occupied by various circuit configurations constituting one stage of the gate driver GD is relatively larger than the area occupied by the pixel PX, the size of each of the plurality of second plate patterns 123 is It may be larger than the size of each of the first plate patterns 121 .

In FIG. 2 , the plurality of second plate patterns 123 are shown to be disposed on both sides of the first direction X in the non-display area NA, but are not limited thereto and may be located in an arbitrary area of the non-display area NA. can be placed. In addition, although the plurality of first plate patterns 121 and the plurality of second plate patterns 123 are shown in the form of a rectangle, the plurality of first plate patterns 121 and the plurality of second plate patterns are not limited thereto. (123) is deformable into various forms.

2 and 4 , the pattern layer 120 includes a plurality of first line patterns 122 disposed in the display area AA and a plurality of second lines disposed in the non-display area NA. A (line) pattern 124 may be further included.

The plurality of first wiring patterns 122 are disposed in the display area AA and connect adjacent first plate patterns 121 to each other. That is, a plurality of first wiring patterns 122 are disposed between the plurality of first plate patterns 121 .

The plurality of second wiring patterns 124 are disposed in the non-display area NA, and connect the first plate pattern 121 and the second plate pattern 123 adjacent to each other, or connect the plurality of second plates adjacent to each other. It may be a pattern connecting the pattern 123 . That is, the plurality of second wiring patterns 124 may be disposed between the first plate pattern 121 and the second plate pattern 123 adjacent to each other. Also, the plurality of second wiring patterns 124 may be disposed between the plurality of second plate patterns 123 adjacent to each other. Referring to FIG. 2 , the plurality of first wiring patterns 122 and second wiring patterns 124 have curved shapes. For example, the plurality of first wiring patterns 122 and second wiring patterns 124 may have a sine wave shape. However, the shapes of the plurality of first wiring patterns 122 and the second wiring patterns 124 are not limited thereto. For example, the plurality of first wiring patterns 122 and the second wiring patterns 124 are zigzag. It can also be extended into a shape. Alternatively, the plurality of first wiring patterns 122 and the second wiring patterns 124 may have various shapes, such as a plurality of diamond-shaped boards connected at vertices and extending. The number and shape of the plurality of first wiring patterns 122 and the second wiring patterns 124 shown in FIG. 2 are exemplary, and the number of the plurality of first wiring patterns 122 and the second wiring patterns 124 And the shape may be variously changed according to the design.

The plurality of first plate patterns 121 , the plurality of first wiring patterns 122 , the plurality of second plate patterns 123 , and the plurality of second wiring patterns 124 are rigid patterns. That is, the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 are formed on the lower substrate 111 and the upper substrate. Compared to (112), it may be rigid. Therefore, the modulus of elasticity of the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 is It may be higher than the modulus of elasticity of the lower substrate 111 . Modulus of elasticity is a parameter representing a ratio of deformation with respect to stress applied to a substrate, and when the modulus of elasticity is relatively high, hardness may be relatively high. Accordingly, each of the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 includes a plurality of first rigid patterns, It may be referred to as a plurality of second stiffness patterns, a plurality of third stiffness patterns, and a plurality of fourth stiffness patterns. The elastic moduli of the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 are higher than those of the lower substrate 111 and the upper substrate 111. It may be 1000 times higher than the modulus of elasticity of the substrate 112, but is not limited thereto.

The plurality of first plate patterns 121 , the plurality of first wiring patterns 122 , the plurality of second plate patterns 123 , and the plurality of second wiring patterns 124 , which are a plurality of rigid substrates, are formed on the lower substrate 111 . and a plastic material having lower flexibility than the upper substrate 112 . For example, the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 are made of polyimide (PI). ), polyacrylate, or polyacetate. At this time, the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 may be made of the same material, but It is not limited and may be made of different materials. When the plurality of first plate patterns 121, the plurality of first wiring patterns 122, the plurality of second plate patterns 123, and the plurality of second wiring patterns 124 are made of the same material, they may be integrally formed. there is.

In some embodiments, the lower substrate 111 may be defined as including a plurality of first lower patterns and a plurality of second lower patterns. The plurality of first lower patterns may be regions overlapping the plurality of first plate patterns 121 and the plurality of second plate patterns 123 of the lower substrate 111, and the second lower patterns may be regions of the plurality of first plates It may be an area that does not overlap with the pattern 121 and the plurality of second plate patterns 123 .

Also, the upper substrate 112 may be defined as including a plurality of first upper patterns and second upper patterns. The plurality of first upper patterns may be an area overlapping the plurality of first plate patterns 121 and the plurality of second plate patterns 123 of the upper substrate 112, and the second upper pattern may be a region of the plurality of first plates It may be an area that does not overlap with the pattern 121 and the plurality of second plate patterns 123 .

In this case, elastic moduli of the plurality of first lower patterns and the first upper pattern may be greater than elastic moduli of the second lower patterns and the second upper pattern. For example, the plurality of first lower patterns and the first upper patterns may be formed of the same material as the plurality of first plate patterns 121 and the plurality of second plate patterns 123, and the second lower patterns and the second plate patterns 123 may be formed of the same material. The upper pattern may be made of a material having a lower modulus of elasticity than the plurality of first plate patterns 121 and the plurality of second plate patterns 123 .

That is, the first lower pattern and the first upper pattern may be made of polyimide (PI), polyacrylate, or polyacetate. And, the second lower pattern and the second upper pattern are made of silicone rubber such as polydimethylsiloxane (PDMS), or an elastomer such as polyurethane (PU) and PTFE (polytetrafluoroethylene). can be made with

<Non-display area drive element>

The gate driver GD is a component that supplies a gate voltage to the plurality of pixels PX disposed in the display area AA. The gate driver GD includes a plurality of stages formed on the plurality of second plate patterns 123 , and each stage of the gate driver GD may be electrically connected to each other through a plurality of gate connection lines. Accordingly, the gate voltage output from one stage can be transmitted to the other stage. Also, each stage may sequentially supply a gate voltage to the plurality of pixels PX connected to each stage.

The power supply PS may be connected to the gate driver GD to supply a gate driving voltage and a gate clock voltage. Also, the power supply PS may be connected to the plurality of pixels PX to supply a pixel driving voltage to each of the plurality of pixels PX. Also, the power supply PS may be formed on the plurality of second plate patterns 123 . That is, the power supply PS may be formed adjacent to the gate driver GD on the second plate pattern 123 . Also, each of the power supplies PS formed on the plurality of second plate patterns 123 may be electrically connected to the gate driver GD and the plurality of pixels PX. That is, the plurality of power supplies PS formed on the plurality of second plate patterns 123 may be connected by gate power supply connection wires and pixel power supply connection wires. Accordingly, each of the plurality of power supplies PS may supply a gate driving voltage, a gate clock voltage, and a pixel driving voltage.

A printed circuit board (PCB) is a component that transfers signals and voltages for driving display elements from a control unit to display elements. Accordingly, the printed circuit board (PCB) may also be referred to as a driving board. Control units such as IC chips and circuit units may be mounted on the printed circuit board (PCB). In addition, a memory, a processor, and the like may be mounted on the printed circuit board (PCB). In addition, the printed circuit board (PCB) provided in the display panel 100 may include an stretchable area and a non-stretchable area in order to secure stretchability. An IC chip, circuit unit, memory, processor, etc. may also be mounted in the non-stretched area, and wires electrically connected to the IC chip, circuit unit, memory, and processor may be disposed in the stretched area.

The data driver DD is a component that supplies data voltages to the plurality of pixels PX disposed in the display area AA. Since the data driver DD may be configured in the form of an IC chip, it may also be referred to as a data integrated circuit (D-IC). Also, the data driver DD may be mounted on a non-stretched area of the printed circuit board PCB. That is, the data driver DD may be mounted on the printed circuit board (PCB) in the form of a COB (Chip On Board). However, in FIG. 2, the data driver (DD) is illustrated as being mounted in a COF (Chip On Film) method, but is not limited thereto, and the data driver (DD) may include COF (Chip on Board), COG (Chip On Glass), It may be mounted in a method such as TCP (Tape Carrier Package).

Also, in FIG. 2 , it is illustrated that one data driver DD is arranged to correspond to the row of first plate patterns 121 arranged in the display area AA, but is not limited thereto. That is, one data driver DD may be arranged to correspond to the plurality of rows of first plate patterns 121 .

Hereinafter, FIGS. 5 and 6 will be referred to together for a more detailed description of the display area AA of the display panel 100 according to an exemplary embodiment of the present invention.

<Plane and cross-sectional structure of display area>

FIG. 5 is a cross-sectional view taken along the cutting line IV-IV′ shown in FIG. 3 .

FIG. 6 is a cross-sectional view taken along the cutting line V-V′ shown in FIG. 3 .

For convenience of explanation, it will be described with reference to FIGS. 2 to 4 together.

2 and 3 , a plurality of first plate patterns 121 are disposed on the lower substrate 111 in the display area AA. The plurality of first plate patterns 121 are spaced apart from each other and disposed on the lower substrate 111 . For example, the plurality of first plate patterns 121 may be arranged in a matrix form on the lower substrate 111 as shown in FIG. 2 , but is not limited thereto.

Referring to FIGS. 3 and 4 , pixels PX including a plurality of sub-pixels SPX are disposed on the first plate pattern 121 . Also, each of the sub-pixels SPX may include an LED 170 as a display element, a driving transistor 160 for driving the LED 170, and a switching transistor 150. However, the display element in the sub-pixel SPX is not limited to the LED and may be changed to an organic light emitting diode. Also, the plurality of sub-pixels SPX may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but are not limited thereto, and the colors of the plurality of sub-pixels SPX may be variously modified as needed. there is.

The plurality of sub-pixels SPX may be connected to a plurality of connection wires 181 and 182 . That is, the plurality of sub-pixels SPX may be electrically connected to the first connection wire 181 extending in the first direction X. Also, the plurality of sub-pixels SPX may be electrically connected to the second connection wire 182 extending in the second direction Y.

Hereinafter, the cross-sectional structure of the display area AA will be described in detail with reference to FIG. 4 .

Referring to FIG. 4 , a plurality of inorganic insulating layers are disposed on the plurality of first plate patterns 121 . For example, the plurality of inorganic insulating layers may include a buffer layer 141, a gate insulating layer 142, a first interlayer insulating layer 143, a second interlayer insulating layer 144, and a passivation layer 145, but , but not limited thereto, various inorganic insulating layers are additionally disposed on the plurality of first plate patterns 121, or the buffer layer 141, which is an inorganic insulating layer, the gate insulating layer 142, the first interlayer insulating layer 143, the first interlayer insulating layer 143, At least one of the two interlayer insulating layers 144 and the passivation layer 145 may be omitted.

Specifically, the buffer layer 141 is disposed on the plurality of first plate patterns 121 . The buffer layer 141 protects various components of the display panel 100 from permeation of moisture (H ₂ O) and oxygen (O ₂ ) from the outside of the lower substrate 111 and the plurality of first plate patterns 121 . It is formed on the plurality of first plate patterns 121 to do so. The buffer layer 141 may be made of an insulating material. For example, the buffer layer 141 may be formed of a single layer or a multi-layer made of at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON). However, the buffer layer 141 may be omitted depending on the structure or characteristics of the display panel 100 .

In this case, the buffer layer 141 may be formed only in an area where the lower substrate 111 overlaps the plurality of first plate patterns 121 and the plurality of second plate patterns 123 . As described above, since the buffer layer 141 may be made of an inorganic material, it may be easily damaged, such as cracks, in the process of stretching the display panel 100 . Accordingly, the buffer layer 141 is not formed in a region between the plurality of first plate patterns 121 and the plurality of second plate patterns 123, and the plurality of first plate patterns 121 and the plurality of second plate patterns. It may be patterned in the shape of (123) and formed only on the plurality of first plate patterns 121 and the plurality of second plate patterns 123. Accordingly, in the display panel 100 according to an embodiment of the present invention, the buffer layer 141 is formed only in an area overlapping the plurality of first plate patterns 121 and the plurality of second plate patterns 123, which are rigid patterns. Damage to various components of the display panel 100 may be prevented even when the display panel 100 is deformed such as being bent or stretched.

4, on the buffer layer 141, the switching transistor 150 including the gate electrode 151, the active layer 152, the source electrode 153 and the drain electrode 154, and the gate electrode 161, the active A driving transistor 160 including a layer 162 , a source electrode and a drain electrode 164 is formed.

First, referring to FIG. 2 , the active layer 152 of the switching transistor 150 and the active layer 162 of the driving transistor 160 are disposed on the buffer layer 141 . For example, each of the active layer 152 of the switching transistor 150 and the active layer 162 of the driving transistor 160 may be formed of an oxide semiconductor, or the active layer 152 and The active layer 162 of the driving transistor 160 may be formed of amorphous silicon (a-Si), polycrystalline silicon (poly-Si), or an organic semiconductor.

A gate insulating layer 142 is disposed on the active layer 152 of the switching transistor 150 and the active layer 162 of the driving transistor 160 . The gate insulating layer 142 electrically insulates the gate electrode 151 of the switching transistor 150 from the active layer 152 of the switching transistor 150, and the gate electrode 161 of the driving transistor 160 and the driving transistor. It is a layer for electrically insulating the active layer 162 of (160). Also, the gate insulating layer 142 may be made of an insulating material. For example, the gate insulating layer 142 may be formed of a single layer of inorganic silicon nitride (SiNx) or silicon oxide (SiOx) or multiple layers of silicon nitride (SiNx) or silicon oxide (SiOx), but is limited thereto. it is not going to be

A gate electrode 151 of the switching transistor 150 and a gate electrode 161 of the driving transistor 160 are disposed on the gate insulating layer 142 . The gate electrode 151 of the switching transistor 150 and the gate electrode 161 of the driving transistor 160 are spaced apart from each other on the gate insulating layer 142 . In addition, the gate electrode 151 of the switching transistor 150 overlaps the active layer 152 of the switching transistor 150, and the gate electrode 161 of the driving transistor 160 is the active layer ( 162) and overlap.

Each of the gate electrode 151 of the switching transistor 150 and the gate electrode 161 of the driving transistor 160 is made of various metal materials, for example, molybdenum (Mo), aluminum (Al), chromium (Cr), gold ( It may be any one of Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), an alloy of two or more, or a multilayer thereof, but is not limited thereto.

A first interlayer insulating layer 143 is disposed on the gate electrode 151 of the switching transistor 150 and the gate electrode 161 of the driving transistor 160 . The first interlayer insulating layer 143 insulates the gate electrode 161 of the driving transistor 160 from the intermediate metal layer IM. The first interlayer insulating layer 143 may be formed of an inorganic material in the same manner as the buffer layer 141 . For example, the first interlayer insulating layer 143 may be composed of a single layer of inorganic silicon nitride (SiNx) or silicon oxide (SiOx) or multiple layers of silicon nitride (SiNx) or silicon oxide (SiOx). It is not limited thereto.

An intermediate metal layer IM is disposed on the first interlayer insulating layer 143 . Also, the intermediate metal layer IM overlaps the gate electrode 161 of the driving transistor 160 . Accordingly, a storage capacitor is formed in an overlapping region between the intermediate metal layer IM and the gate electrode 161 of the driving transistor 160 . In detail, the gate electrode 161 of the driving transistor 160, the first interlayer insulating layer 143, and the intermediate metal layer IM form a storage capacitor. However, the arrangement area of the intermediate metal layer IM is not limited thereto, and the intermediate metal layer IM may overlap other electrodes to form storage capacitors in various ways.

The intermediate metal layer (IM) is made of various metal materials, for example, molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and It may be any one of copper (Cu), an alloy of two or more, or a multilayer thereof, but is not limited thereto.

A second interlayer insulating layer 144 is disposed on the intermediate metal layer IM. The second interlayer insulating layer 144 insulates the gate electrode 151 of the switching transistor 150 from the source electrode 153 and the drain electrode 154 of the switching transistor 150 . Further, the second interlayer insulating layer 144 insulates the intermediate metal layer IM from the source and drain electrodes 164 of the driving transistor 160 . The second interlayer insulating layer 144 may be made of an inorganic material in the same manner as the buffer layer 141 . For example, the first interlayer insulating layer 143 may be composed of a single layer of inorganic silicon nitride (SiNx) or silicon oxide (SiOx) or multiple layers of silicon nitride (SiNx) or silicon oxide (SiOx). It is not limited thereto.

A source electrode 153 and a drain electrode 154 of the switching transistor 150 are disposed on the second interlayer insulating layer 144 . And, the source electrode and the drain electrode 164 of the driving transistor 160 are disposed on the second interlayer insulating layer 144 . The source electrode 153 and the drain electrode 154 of the switching transistor 150 are spaced apart from each other on the same layer. In addition, although the source electrode of the driving transistor 160 is omitted in FIG. 2 , the source electrode of the driving transistor 160 is also spaced apart from the drain electrode 164 on the same layer. In the switching transistor 150 , the source electrode 153 and the drain electrode 154 may be electrically connected to the active layer 152 in a manner in contact with the active layer 152 . Also, in the driving transistor 160 , the source electrode and the drain electrode 164 may be electrically connected to the active layer 162 in a manner in contact with the active layer 162 . Also, the drain electrode 154 of the switching transistor 150 may be electrically connected to the gate electrode 161 of the driving transistor 160 in a manner in contact with the gate electrode 161 of the driving transistor 160 through a contact hole. .

The source electrode 153 and the drain electrodes 154 and 164 may be made of various metal materials, for example, molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni) ), neodymium (Nd), and copper (Cu), or may be an alloy of two or more, or a multilayer thereof, but is not limited thereto.

In addition, although the driving transistor 160 is described as having a coplanar structure in this specification, various transistors such as a staggered structure may also be used. Also, in the present specification, the transistor may be formed in a bottom gate structure as well as a top gate structure.

A gate pad GP and a data pad DP may be disposed on the second interlayer insulating layer 144 .

Specifically, referring to FIG. 5 , the gate pad GP is a pad for transferring a gate voltage to the plurality of sub-pixels SPX. The gate pad GP is connected to the first connection wire 181 through a contact hole. Also, the gate voltage supplied from the first connection wire 181 may be transferred from the gate pad GP to the gate electrode 151 of the switching transistor 150 through the wire formed on the first plate pattern 121 . .

Also, referring to FIG. 4 , the data pad DP is a pad for transferring data voltages to the plurality of sub-pixels SPX. The data pad DP is connected to the second connection wire 182 through a contact hole. Also, the data voltage supplied from the second connection wire 182 may be transferred from the data pad DP to the source electrode 153 of the switching transistor 150 through the wire formed on the first plate pattern 121. .

Also, referring to FIG. 4 , the voltage pad VP is a pad for transferring a low potential voltage to the plurality of sub-pixels SPX. The voltage pad VP is connected to the first connection wire 181 through a contact hole. The low potential voltage supplied from the first connection wire 181 is applied from the voltage pad VP to the n-electrode 174 of the LED 170 through the second connection pad CNT2 formed on the first plate pattern 121. ) can be transmitted.

The gate pad GP and the data pad DP may be made of the same material as the source electrode 153 and the drain electrodes 154 and 164, but are not limited thereto.

Referring to FIG. 2 , a passivation layer 145 is formed on the switching transistor 150 and the driving transistor 160 . That is, the passivation layer 145 covers the switching transistor 150 and the driving transistor 160 to protect the switching transistor 150 and the driving transistor 160 from penetration of moisture and oxygen. The passivation layer 145 may be made of an inorganic material and may be made of a single layer or a double layer, but is not limited thereto.

In addition, the gate insulating layer 142, the first interlayer insulating layer 143, the second interlayer insulating layer 144, and the passivation layer 145 are patterned and formed only in regions overlapping the plurality of first plate patterns 121. It can be. Since the gate insulating layer 142 , the first interlayer insulating layer 143 , the second interlayer insulating layer 144 , and the passivation layer 145 may also be made of an inorganic material like the buffer layer 141 , the display panel 100 In the process of stretching, cracks may easily occur and may be damaged. Accordingly, the gate insulating layer 142, the first interlayer insulating layer 143, the second interlayer insulating layer 144, and the passivation layer 145 are not formed in regions between the plurality of first plate patterns 121, It may be patterned into the shape of the plurality of first plate patterns 121 and formed only on the plurality of first plate patterns 121 .

A planarization layer 146 is formed on the passivation layer 145 . The planarization layer 146 planarizes upper portions of the switching transistor 150 and the driving transistor 160 . The planarization layer 146 may be composed of a single layer or a plurality of layers, and may be made of an organic material. Accordingly, the planarization layer 146 may also be referred to as an organic insulating layer. For example, the planarization layer 146 may be made of an acryl-based organic material, but is not limited thereto.

Referring to FIG. 4 , the planarization layer 146 includes a buffer layer 141 , a gate insulating layer 142 , a first interlayer insulating layer 143 , and a second interlayer insulating layer 144 on the plurality of first plate patterns 121 . ) and the top and side surfaces of the passivation layer 145 . In addition, the planarization layer 146 includes a plurality of first plate patterns 121, a buffer layer 141, a gate insulating layer 142, a first interlayer insulating layer 143, a second interlayer insulating layer 144, and a passivation layer. Layer 145 surrounds it. Specifically, the planarization layer 146 is the top and side surfaces of the passivation layer 145, the side surface of the first interlayer insulating layer 143, the side surface of the second interlayer insulating layer 144, the side surface of the gate insulating layer 142, It may be disposed to cover portions of side surfaces of the buffer layer 141 and top surfaces of the plurality of first plate patterns 121 . Accordingly, the planarization layer 146 compensates for the step difference on the sides of the buffer layer 141, the gate insulating layer 142, the first interlayer insulating layer 143, the second interlayer insulating layer 144, and the passivation layer 145. can do. Also, the planarization layer 146 may increase adhesive strength with the connection wires 181 and 182 disposed on the side surfaces of the planarization layer 146 .

4, the inclination angle of the side of the planarization layer 146 is the buffer layer 141, the gate insulating layer 142, the first interlayer insulating layer 143, the second interlayer insulating layer 144, and the passivation layer 145. ) may be smaller than the inclination angle formed by the side surfaces of For example, the side of the planarization layer 146 is the side of the passivation layer 145, the side of the first interlayer insulating layer 143, the side of the second interlayer insulating layer 144, and the side of the gate insulating layer 142. And the side surfaces of the buffer layer 141 may have a gentler slope than the respective slopes. Accordingly, since the connection wires 181 and 182 disposed in contact with the side surfaces of the planarization layer 146 are disposed with a gentle slope, stress generated in the connection wires 181 and 182 when the display panel 100 is stretched is reduced. can be reduced In addition, since the side surface of the planarization layer 146 has a relatively gentle slope, a phenomenon in which the connection wires 181 and 182 are cracked or peeled off from the side surface of the planarization layer 146 can be suppressed.

Referring to FIGS. 3 to 5 , connection wires 181 and 182 refer to wires electrically connecting pads on the plurality of first plate patterns 121 . The connection wires 181 and 182 are disposed on the plurality of first wiring patterns 122 . In addition, the connection wires 181 and 182 also extend over the plurality of first plate patterns 121 to be electrically connected to the gate pads GP and data pads DP on the plurality of first plate patterns 121 . It can be. Referring to FIG. 2 , the first wiring pattern 122 is not disposed in an area between the plurality of first plate patterns 121 where the connection wires 181 and 182 are not disposed.

The connection wires 181 and 182 include a first connection wire 181 and a second connection wire 182 . The first connection wire 181 and the second connection wire 182 are disposed between the plurality of first plate patterns 121 . Specifically, the first connection wire 181 refers to a wire extending in the X-axis direction between the plurality of first plate patterns 121 among the connection wires 181 and 182, and the second connection wire 182 is connected A wiring extending in the Y-axis direction between the plurality of first plate patterns 121 among the wirings 181 and 182 .

The connection wires 181 and 182 are made of a metal material such as copper (Cu), aluminum (Al), titanium (Ti), or molybdenum (Mo), or copper/molybdenum-titanium (Cu/Moti) or titanium/aluminum/titanium (Ti). /Al/Ti) may be made of a laminated structure of a metal material such as, but is not limited thereto.

In the case of a display panel of a general display device, various lines such as a plurality of gate lines and a plurality of data lines are disposed extending in a straight line between a plurality of sub-pixels, and a plurality of sub-pixels are connected to one signal line. Accordingly, in the case of a display panel of a general display device, various wires such as a gate wire, a data wire, a high potential voltage wire, and a reference voltage wire extend from one side of the display panel of the organic light emitting display device to the other side without interruption on the substrate. .

In contrast, in the case of the display panel 100 according to an exemplary embodiment of the present invention, a linear gate wire, a data wire, a high potential voltage wire, a reference voltage wire, and Various wires such as initialization voltage wires are disposed only on the plurality of first plate patterns 121 and the plurality of second plate patterns 123 . That is, in the display panel 100 according to an exemplary embodiment of the present invention, linear wires are disposed only on the plurality of first plate patterns 121 and the plurality of second plate patterns 123 .

In the display panel 100 according to an exemplary embodiment of the present invention, pads on two adjacent first plate patterns 121 may be connected by connection wires 181 and 182 . Accordingly, the connection wires 181 and 182 electrically connect the gate pads GP or data pads DP on the two adjacent first plate patterns 121 . Accordingly, the display panel 100 according to an exemplary embodiment of the present invention electrically connects various wires such as a gate wire, a data wire, a high potential voltage wire, and a reference voltage wire between the plurality of first plate patterns 121 . A plurality of connection wires 181 and 182 may be included. For example, gate wires may be disposed on the plurality of first plate patterns 121 disposed adjacently in the first direction X, and gate pads GP may be disposed at both ends of the gate wires. In this case, each of the plurality of gate pads GP on the plurality of first plate patterns 121 disposed adjacently in the first direction X may be connected to each other by a first connection wire 181 functioning as a gate wire. . Accordingly, the gate wiring disposed on the plurality of first plate patterns 121 and the first connection wiring 181 disposed on the first wiring pattern 122 may function as one gate wiring. The gate wiring described above may be referred to as a scan signal wiring. In addition, among all the various wires that may be included in the display panel 100, wires extending in the first direction X, for example, light-emitting signal wires, low-potential voltage wires, and high-potential voltage wires, also have the first, as described above. They may be electrically connected by the connection wire 181 .

Referring to FIGS. 3 and 5 , the first connection wire 181 is disposed side by side among the gate pads GP on the plurality of first plate patterns 121 disposed adjacent to each other in the first direction X. Gate pads GP on the first plate pattern 121 may be connected to each other. The first connection wire 181 may function as a gate wire, a light emitting signal wire, a high potential voltage wire, or a low potential voltage wire, but is not limited thereto. The gate pads GP on the plurality of first plate patterns 121 disposed in the first direction X may be connected by a first connection wire 181 functioning as a gate wire, and one gate voltage may be transmitted. can

Further, referring to FIGS. 3 and 3 , the second connection wire 182 is disposed side by side among the data pads DP on the plurality of first plate patterns 121 disposed adjacent to each other in the second direction Y. Data pads DP on the first plate pattern 121 of the dog may be connected to each other. The second connection wire 182 may function as a data wire, a high potential voltage wire, a low potential voltage wire, or a reference voltage wire, but is not limited thereto. Internal wires on the plurality of first plate patterns 121 disposed in the second direction (Y) may be connected by a plurality of second connection wires 182 functioning as data wires, and one data voltage may be transmitted. there is.

As shown in FIG. 5 , the first connection wire 181 may be disposed to contact the top and side surfaces of the planarization layer 146 disposed on the first plate pattern 121 . Also, the first connection wire 181 may be formed to extend to the upper surface of the first wire pattern 122 . In addition, the second connection wires 182 may be disposed to contact the top and side surfaces of the planarization layer 146 disposed on the first plate pattern 121 . Also, the second connection wire 182 may be formed to extend to the upper surface of the first wire pattern 122 .

However, as shown in FIG. 6 , since the rigid pattern does not need to be disposed in an area where the first connection wire 181 and the second connection wire 182 are not disposed, the first connection wire 181 and the second connection wire 182 do not need to be disposed. The first wiring pattern 122 , which is a rigid pattern, is not disposed under the connection wiring 182 .

Meanwhile, referring to FIG. 4 , a bank 147 is formed on the first connection pattern CNT1 , the connection wires 181 and 182 , and the planarization layer 146 . The bank 147 is a component that divides adjacent sub-pixels SPX. The bank 147 is disposed to cover at least a portion of the pad PD, the connection wires 181 and 182 , and the planarization layer 146 . The bank 147 may be made of an insulating material. Also, the bank 147 may include a black material. The bank 147 serves to cover wires visible through the display area AA by including a black material. The bank 147 may be made of, for example, a transparent carbon-based mixture, and may specifically include carbon black. However, it is not limited thereto, and the bank 147 may be made of a transparent insulating material. Also, although the height of the bank 147 is lower than that of the LED 170 in FIG. 2 , it is not limited thereto, and the height of the bank 147 may be equal to the height of the LED 170 .

Referring to FIG. 4 , LEDs 170 are disposed on the first and second connection pads CNT1 and CNT2 . The LED 170 includes an n-type layer 171, an active layer 172, a p-type layer 173, an n-electrode 174, and a p-electrode 175. The LED 170 of the display panel 100 according to an embodiment of the present invention has a flip-chip structure in which an n-electrode 174 and a p-electrode 175 are formed on one surface.

The n-type layer 171 may be formed by implanting n-type impurities into gallium nitride (GaN) having excellent crystallinity. The n-type layer 171 may be disposed on a separate base substrate made of a material that can emit light.

An active layer 172 is disposed on the n-type layer 171 . The active layer 172 is a light emitting layer that emits light from the LED 170 and may be formed of a nitride semiconductor, for example, indium gallium nitride (InGaN). A p-type layer 173 is disposed on the active layer 172 . The p-type layer 173 may be formed by implanting p-type impurities into gallium nitride (GaN).

As described above, in the LED 170 according to an embodiment of the present invention, after sequentially stacking the n-type layer 171, the active layer 172, and the p-type layer 173, and then etching a predetermined portion, It is manufactured by forming the n-electrode 174 and the p-electrode 175. At this time, a predetermined portion is a space for separating the n-electrode 174 and the p-electrode 175, and the predetermined portion is etched to expose a portion of the n-type layer 171. In other words, the surfaces of the LED 170 on which the n-electrode 174 and the p-electrode 175 are disposed may have different height levels instead of being flattened.

In this way, the n-electrode 174 is disposed in the etched region, and the n-electrode 174 may be made of a conductive material. Also, a p-electrode 175 is disposed in an area that is not etched, and the p-electrode 175 may also be made of a conductive material. For example, the n electrode 174 is disposed on the n-type layer 171 exposed through the etching process, and the p-electrode 175 is disposed on the p-type layer 173. The p-electrode 175 is the n-electrode 174 It may be made of the same material as

The adhesive pattern AD is disposed between the upper surfaces of the first and second connection pads CNT1 and CNT2 and between the first and second connection pads CNT1 and CNT2, so that the LED 170 is It may be adhered to the first connection pad CNT1 and the second connection pad CNT2. In this case, the n-electrode 174 may be disposed on the second connection pad CNT2, and the p-electrode 175 may be disposed on the first connection pad CNT1.

The adhesive pattern AD may be a conductive adhesive pattern in which conductive balls are dispersed in an insulating base member. Accordingly, when heat or pressure is applied to the adhesive pattern AD, the conductive balls are electrically connected to the portion where the heat or pressure is applied to have conductive characteristics, and the non-pressurized region may have insulating characteristics. For example, the n-electrode 174 is electrically connected to the second connection pad CNT2 through the adhesive pattern AD, and the p-electrode 175 is electrically connected to the first connection pad CNT1 through the adhesive pattern AD. is electrically connected with After the adhesive pattern AD is applied on the top surface of the second connection pad CNT2 and the first connection pad CNT1 by an inkjet method or the like, the LED 170 is transferred onto the adhesive pattern AD, and the LED The first connection pad CNT1 and the p-electrode 175 and the second connection pad CNT2 and the n-electrode 174 may be electrically connected by pressing and heating the 170 . However, the portion of the adhesive pattern AD disposed between the n-electrode 174 and the second connection pad CNT2 and the portion of the adhesive pattern AD disposed between the p-electrode 175 and the first connection pad CNT1 Parts of the adhesive pattern AD other than the part have insulating properties. Meanwhile, the adhesive pattern AD may be disposed on each of the first connection pad CNT1 and the second connection pad CNT2 in a separate form.

Also, the first connection pad CNT1 is electrically connected to the drain electrode 164 of the driving transistor 160 and receives a driving voltage for driving the LED 170 from the driving transistor 160 . Although FIG. 4 shows that the first connection pad CNT1 and the drain electrode 164 of the driving transistor 160 are indirectly connected without direct contact, the first connection pad CNT1 and the driving transistor are not limited thereto. The drain electrode 164 of 160 may be in direct contact. Also, a low potential driving voltage for driving the LED 170 is applied to the second connection pad CNT2 . Accordingly, when the display panel 100 is turned on, different voltage levels applied to the first and second connection pads CNT1 and CNT2 are applied to the n-electrode 174 and the p-electrode 175, respectively. It is transmitted and the LED 170 emits light.

The upper substrate 112 is a substrate supporting various components disposed under the upper substrate 112 . Specifically, the upper substrate 112 is formed by coating a material constituting the upper substrate 112 on the lower substrate 111 and the first plate pattern 121 and then curing the material, thereby forming the lower substrate 111, It may be disposed to be in contact with the first plate pattern 121 , the first wiring pattern 122 , and the connection wires 181 and 182 .

The upper substrate 112 may be made of the same material as the lower substrate 111 . For example, the upper substrate 112 may be made of silicone rubber such as polydimethylsiloxane (PDMS), polyurethane (PU), or elastomer such as polytetrafluoroethylene (PTFE). , Therefore, it may have a flexible property. However, the material of the upper substrate 112 is not limited thereto.

Meanwhile, although not shown in FIG. 4 , a polarization layer may be disposed on the upper substrate 112 . The polarization layer may polarize light incident from the outside of the display panel 100 to reduce reflection of external light. In addition, an optical film other than the polarization layer may be disposed on the upper substrate 112 .

In addition, a first filling layer 190 may be disposed on the entire surface of the lower substrate 111 to fill between the upper substrate 112 and components disposed on the lower substrate 111 . The first filling layer 190 may be made of a curable adhesive. Specifically, the material constituting the first filling layer 190 is coated on the entire surface of the lower substrate 111 and then cured to form a space between the upper substrate 112 and the components disposed on the lower substrate 111. The first filling layer 190 may be disposed on. For example, the first filling layer 190 may be an optically clear adhesive (OCA), and may be composed of an acrylic adhesive, a silicone adhesive, a urethane adhesive, or the like.

<Circuit structure of display area>

7 is a circuit diagram of a sub-pixel of a display panel of a display device according to an exemplary embodiment of the present invention.

Hereinafter, for convenience of explanation, the structure and operation of the case where the sub-pixel (SPX) of the display panel of the display device according to an embodiment of the present invention is a 2T (transistor) 1C (capacitor) pixel circuit will be described. The invention is not limited thereto.

4 and 7 , the subpixel SPX of the display panel of the display device according to an exemplary embodiment of the present invention includes a switching transistor 150, a driving transistor 160, and a storage capacitor (C). ) and LED 170.

The switching transistor 150 transmits the data signal DATA supplied through the second connection line 182 to the driving transistor 160 and the storage capacitor according to the gate signal SCAN supplied through the first connection line 181. Applies to (C).

And, the gate electrode 151 of the switching transistor 150 is electrically connected to the first connection wire 181, and the source electrode 153 of the switching transistor 150 is connected to the second connection wire 182, The drain electrode 154 of the switching transistor 150 is connected to the gate electrode 161 of the driving transistor 160 .

The driving transistor 160 corresponds to the data voltage DATA stored in the storage capacitor C, so that the driving current according to the high potential power VDD supplied through the first connection wire 181 and the data voltage DATA can work smoothly.

The gate electrode 161 of the driving transistor 160 is electrically connected to the drain electrode 154 of the switching transistor 150, and the source electrode of the driving transistor 160 is connected to the first connection wire 181. , the drain electrode 164 of the driving transistor 160 is connected to the LED 170.

The LED 170 may operate to emit light according to a driving current formed by the driving transistor 160 . And, as described above, the n-electrode 174 of the LED 170 is connected to the first connection wire 181 to receive low-potential power (VSS), and the p-electrode 174 of the LED 170 is driven. A driving voltage corresponding to the driving current may be applied by being connected to the drain electrode 164 of the transistor 160 .

A sub-pixel SPX of a display panel of a display device according to an exemplary embodiment of the present invention has a 2T1C structure including a switching transistor 150, a driving transistor 160, a storage capacitor C, and an LED 170. , When a compensation circuit is added, it can be configured in various ways such as 3T1C, 4T2C, 5T2C, 6T1C, 6T2C, 7T1C, 7T2C, etc.

As described above, the display panel of the display device according to an exemplary embodiment of the present invention may include a plurality of subpixels on a first substrate that is a rigid substrate, and each of the plurality of subpixels SPX includes a switching transistor and a driving transistor. It may be configured to include a storage capacitor and an LED.

Accordingly, the display panel of the display device according to an exemplary embodiment of the present invention may not only be stretched by the lower substrate, but also may include pixel circuits having a 2T1C structure on each first substrate, and data may be provided according to each gate timing. Light can be emitted according to the voltage.

Hereinafter, a touch panel of a display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 8 to 9A .

<Touch panel structure>

8 is a plan view of a touch panel of a display device according to an exemplary embodiment.

FIG. 9A is an enlarged plan view of area B shown in FIG. 8 .

FIG. 9B is a cross-sectional view taken along the cutting line IX-IX' shown in FIG. 9A.

As shown in FIGS. 7 to 9B , the touch panel may include a touch pattern layer 210 , a touch electrode layer 220 and a touch substrate 230 .

The touch pattern layer 210 may include a plurality of stretched patterns 211 and 212 . The plurality of stretched patterns 211 and 212 include first stretched patterns 211 and second stretched patterns 212 having different shapes. Specifically, the plurality of first stretched patterns 211 may be arranged in the second direction (Y). Also, the plurality of second stretched patterns 212 may be disposed adjacent to each other in the first direction X of the plurality of first stretched patterns 211 and may be arranged in the second direction Y.

Each of the plurality of stretching patterns 211 and 212 may be composed of a plurality of unit patterns 211u. Specifically, as shown in FIGS. 9A and 9B , each of the plurality of unit patterns 211u constituting the first stretched pattern 211 includes a first sub-unit pattern 211a and a first sub-unit pattern 211a. A second sub-unit pattern 211b disposed inside may be included.

For example, as shown in FIG. 9A , the first sub-unit pattern 211a may have a hexagonal shape. However, without being limited thereto, the first sub unit pattern 211a may be transformed into a polygon such as an octagon or a circle. Also, the second sub unit pattern 211b may have a mesh shape.

Accordingly, since an empty space exists inside each of the plurality of unit patterns 211u, each of the plurality of unit patterns 211u may be stretched in the first direction (X) and the second direction (Y). Accordingly, the first stretched pattern 211 composed of a plurality of unit patterns 211u may also extend in the first direction (X) and the second direction (Y).

Although only the first stretched pattern 211 is illustrated in FIGS. 9A and 9B , the second stretched pattern 212 may also be composed of the plurality of unit patterns 211u described above. Accordingly, the second stretched pattern 212 may also extend in the first direction (X) and the second direction (Y).

Referring to FIG. 8 , the touch pattern layer 210 has a first connection pattern 213 connecting a plurality of elongated patterns 211 and 212 disposed in a first direction (X) and disposed in a second direction (Y). It may include a second connection pattern 214 connecting the plurality of elongated patterns 211 and 212 to be.

For example, the first connection pattern 213 may connect the first stretched pattern 211 and the second stretched pattern 212 adjacent in the first direction (X). Also, the second connection pattern 214 may connect a plurality of first stretched patterns 211 adjacent in the second direction (Y).

Also, each of the first connection pattern 213 and the second connection pattern 214 has a curved shape. For example, each of the first connection pattern 213 and the second connection pattern 214 may have a sine wave shape. However, the shape of each of the first connection pattern 213 and the second connection pattern 214 is not limited thereto, and for example, each of the first connection pattern 213 and the second connection pattern 214 has a zigzag shape. may be extended. Alternatively, each of the first connection pattern 213 and the second connection pattern 214 may have various shapes, such as a plurality of diamond-shaped substrates connected at vertices and extending.

Thus, the first connection pattern 213 and the second connection pattern 214 may physically connect the plurality of first stretched patterns 211 and second stretched patterns 212 . Thus, even if the touch panel 200 is stretched, the arrangement of the plurality of first stretched patterns 211 and second stretched patterns 212 may be maintained.

Meanwhile, the first stretched pattern 211, the second stretched pattern 212, the first connection pattern 213, and the second connection pattern 214 constituting the touch pattern layer 210 have low flexibility. It may be made of a plastic material having. For example, the first stretched pattern 211, the second stretched pattern 212, the first connection pattern 213, and the second connection pattern 214 constituting the touch pattern layer 210 may be made of polyimide; PI), polyacrylate, and polyacetate.

The touch electrode layer 220 may include a plurality of touch electrodes 221 and 222 , a bridge wire 223 , and a plurality of routing wires 224 and 225 .

The plurality of touch electrodes 221 and 222 may include a plurality of first touch electrodes 221 extending in a first direction (X) and a plurality of second touch electrodes 222 extending in a second direction (Y). can Also, the plurality of first touch electrodes 221 and the plurality of second touch electrodes 222 may be formed of a metal layer disposed on the same layer. Accordingly, the first touch electrode 221 may be electrically connected through the bridge wire 223 extending in the first direction (X), but the second touch electrode 222 may be electrically connected without a separate bridge wire. . The above-described bridge wiring 223 may be formed of a metal layer disposed on a different layer from the first touch electrode 221 and the plurality of second touch electrodes 222 .

Each of the plurality of touch electrodes 221 and 222 may include a plurality of unit electrodes 221u. Specifically, as shown in FIGS. 9A and 9B , each of the plurality of unit electrodes 221u constituting the first touch electrode 221 may have a hexagonal shape. However, it is not limited thereto, and each of the plurality of unit electrodes 221u may be deformed into a polygonal shape such as an octagon or a circular shape. Each of the plurality of touch electrodes 221 and 222 may have a honeycomb shape.

Also, each of the plurality of unit electrodes 221u may be disposed on the first sub-unit pattern 211a. That is, each of the plurality of unit electrodes 221u may overlap the first sub-unit pattern 211a.

Thus, since an empty space exists inside each of the plurality of unit electrodes 221u, each of the plurality of unit electrodes 221u may be stretched and contracted in the first direction (X) and the second direction (Y). Accordingly, the first touch electrode 221 composed of the plurality of unit electrodes 221u may also extend in the first direction (X) and the second direction (Y).

Although only the first touch electrode 221 is illustrated in FIGS. 9A and 9B , the second touch electrode 222 may also include the plurality of unit electrodes 221u described above. Accordingly, the second touch electrode 222 may also extend in the first direction (X) and the second direction (Y).

Meanwhile, although it has been described that all of the plurality of touch electrodes 221 and 222 are composed of a plurality of unit electrodes 221u, the plurality of unit electrodes 221u are a plurality of first unit electrodes constituting the first touch electrode 221 and The second touch electrode 222 may be defined as being divided into a plurality of second unit electrodes, but is not limited thereto.

Referring to FIG. 8 , the touch electrode layer 220 includes a first routing wire 224 electrically connected to the first touch electrode 221 and a second routing wire 225 electrically connected to the second touch electrode 222 . ) may be further included.

For example, each of the plurality of first routing wires 224 is connected to both sides of the first touch electrode 221 in the first direction X, and each of the second routing wires 225 is connected to the second touch electrode 222 . ) is connected to one side of the second direction (Y).

Accordingly, a touch driving signal may be transmitted to the first touch electrode 221 through each of the plurality of first routing wires 224 and may be transmitted to the second touch electrode 222 through each of the plurality of second routing wires 225 . The applied touch detection signal may be transmitted to the touch driver.

Accordingly, each of the plurality of first touch electrodes 221 may perform the function of a touch transmission electrode (Tx electrode) for applying a touch driving signal, and each of the plurality of second touch electrodes 222 may receive a touch sensing signal. It can perform the function of a touch receiving electrode (Rx electrode).

Conversely, the touch sensing signal applied to the first touch electrode 221 is transmitted to the touch driver through each of the plurality of first routing wires 224, and the second touch electrode is transmitted through each of the plurality of second routing wires 225. A touch driving signal may be transmitted to 222 . In this case, the plurality of first touch electrodes 221 function as touch receiving electrodes (Rx electrodes) to which a touch sensing signal is applied, and the plurality of second touch electrodes 222 function as touch transmitting electrodes to which a touch driving signal is applied ( Tx electrode).

Also, each of the bridge wiring 223, the first routing wiring 224, and the second routing wiring 225 has a curved shape. For example, each of the bridge wiring 223, the first routing wiring 224, and the second routing wiring 225 may have a sine wave shape. However, each shape of the first connection pattern 213 and the second connection pattern 214 is not limited thereto, and for example, the bridge wiring 223, the first routing wiring 224, and the second routing wiring 225 ) may each extend in a zigzag shape. Alternatively, each of the bridge wiring 223, the first routing wiring 224, and the second routing wiring 225 may have various shapes, such as a plurality of diamond-shaped substrates connected at vertices and extending.

Accordingly, since each of the bridge wiring 223, the first routing wiring 224, and the second routing wiring 225 is stretchable, the touch electrode layer 220 may also be stretchable.

The plurality of touch electrodes 221 and 222 constituting the touch electrode layer 220, the bridge wiring 223, and the plurality of routing wirings 224 and 225 are made of various metal materials, for example, molybdenum (Mo), aluminum ( It may be any one of Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), an alloy of two or more, or a multilayer thereof. It is not limited.

And referring to FIG. 9B , a touch substrate 230 may be disposed on the touch electrode layer 220 . The touch substrate 230 is disposed on the uppermost part of the display device, and is a configuration in which a touch such as a finger or a pen is directly performed. Also, the touch substrate 230 is a flexible substrate and may be made of an insulating material that can be bent or stretched. For example, the touch substrate 230 is made of silicone rubber such as polydimethylsiloxane (PDMS) or an elastomer such as polyurethane (PU) and PTFE (polytetrafluoroethylene). , Therefore, it may have a flexible property.

A second filling layer 240 may be disposed to fill between components disposed under the touch substrate 230 . The second filling layer 240 may be made of a curable adhesive. Specifically, a material constituting the second filling layer 240 is formed by coating the entire surface of the touch substrate 230 and then curing the second filling layer ( 240) can be placed. For example, the second filling layer 240 may be an optically clear adhesive (OCA), and may be composed of an acrylic adhesive, a silicone adhesive, a urethane adhesive, or the like.

As described above, in the touch panel 200 of the display device according to an embodiment of the present invention, the stretchable touch electrode 210 may be disposed on the stretchable touch pattern layer 210 . Accordingly, even if the touch panel 200 is stretched, the stretching stress received by the touch electrodes 221 and 222 due to the touch pattern layer 210 may be dispersed. Accordingly, reliability of stretching of the touch panel of the display device according to an embodiment of the present invention may be improved.

10A is a cross-sectional view illustrating a laser lift off (LLO) process of a conventional touch panel.

10B is a cross-sectional view illustrating a laser lift off (LLO) process of a touch panel of a display device according to an exemplary embodiment.

Referring to FIG. 10A , a conventional touch panel is manufactured by forming a sacrificial pattern on a glass substrate and stacking a touch pattern and a touch electrode thereon. And, by irradiating a laser on the lower part of the glass substrate, the glass substrate and the sacrificial pattern were separated. Then, a display device was formed by attaching the separated touch patterns and touch electrodes to the display panel.

However, as shown in FIG. 10A, the contact area between the adhesive filling layer (Adhesive) filled on the touch electrode and the glass substrate is relatively wide, so even if the laser is irradiated on the lower part of the glass substrate, the glass substrate is separated from the adhesive filling layer. An unsolvable problem occurred.

As shown in FIG. 10B , in the touch panel 200 of the display device according to an exemplary embodiment, a second sub unit pattern 211b may be further disposed between the second filling layer 240 and the glass substrate. there is. Accordingly, the contact area between the second filling layer 240 and the glass substrate can be relatively narrowed, so that the glass substrate can be easily separated from the second filling layer 240 when a laser is irradiated to the lower portion of the glass substrate. .

Accordingly, efficiency of a laser lift off (LLO) process for the touch panel of the display device according to an embodiment of the present invention may be increased.

Hereinafter, a touch panel of a display device according to another embodiment of the present invention will be described. Since the touch panel of the display device according to one embodiment of the present invention and the touch panel of the display device according to another embodiment of the present invention differ only in the shape of the second sub unit pattern and the sub connection pattern, only this will be described. In addition, overlapping contents of the touch panel of the display device according to one embodiment of the present invention and the display device according to another embodiment of the present invention are omitted, and the same reference numerals are used for the same elements.

11A is an enlarged plan view of a touch panel of a display device according to another exemplary embodiment of the present invention.

FIG. 11B is a cross-sectional view taken along the line XI-XI' shown in FIG. 11A.

Each of the plurality of stretched patterns may be composed of a plurality of unit patterns 411u. Specifically, as shown in FIGS. 11A and 11B , each of the plurality of unit patterns 411u constituting each of the plurality of stretch patterns is located inside the first sub-unit pattern 411a and the first sub-unit pattern 411a. A second sub-unit pattern 411b may be disposed.

For example, as shown in FIG. 11A , the first sub-unit pattern 411a may have a hexagonal shape. However, without being limited thereto, the first sub-unit pattern 411a may be transformed into a polygon such as an octagon or a circle.

In addition, the second sub unit pattern 411b may also have a hexagonal shape. However, it is not limited thereto and the second sub unit pattern 411b may also be transformed into a polygon such as an octagon or a circle. However, since the second sub-unit pattern 411b is disposed inside the first sub-unit pattern 411a, the size of the second sub-unit pattern 411b may be smaller than that of the first sub-unit pattern 411a. .

In addition, although it is illustrated that no empty space exists inside the second sub-unit pattern 411b in FIG. 11A, it is not limited thereto, and empty space may exist inside the second sub-unit pattern 411b.

Accordingly, an empty space exists between the first sub-unit pattern 411a and the second sub-unit pattern 411b inside each of the plurality of unit patterns 411u, so that each of the plurality of unit patterns 411u has a first sub-unit pattern 411u. It can be stretched in the direction (X) and the second direction (Y). Accordingly, each of the plurality of stretched patterns composed of the plurality of unit patterns 411u may also extend in the first direction (X) and the second direction (Y).

Also, the touch panel of the display device according to another embodiment of the present invention may further include a sub connection pattern 411c connecting the first sub unit pattern 411a and the second sub unit pattern 411b.

Accordingly, since the first sub unit pattern 411a and the second sub unit pattern 411b are physically connected, they are not separated even when the touch panel of the display device according to another embodiment of the present invention is stretched, thereby promoting structural stability. can do.

Also, each of the plurality of unit electrodes 421u may be disposed on the first sub-unit pattern 411a. That is, each of the plurality of unit electrodes 421u may overlap the first sub-unit pattern 411a.

Accordingly, since an empty space exists inside each of the plurality of unit electrodes 421u, each of the plurality of unit electrodes 421u may be stretched in the first direction (X) and the second direction (Y). Accordingly, the plurality of touch electrodes composed of the plurality of unit electrodes 421u may also extend in the first direction (X) and the second direction (Y).

As described above, the touch panel of the display device according to another embodiment of the present invention may also dispose the stretchable touch electrode on the stretchable touch pattern layer. Accordingly, reliability of stretching of the touch panel of the display device according to another embodiment of the present invention may be improved.

In addition, as shown in FIG. 10B , the touch panel of the display device according to another embodiment of the present invention includes a second sub unit pattern 411b and a sub connection pattern 411c between the second filling layer 240 and the glass substrate. ) may be further arranged. Accordingly, a contact area between the second filling layer 240 and the glass substrate may be relatively narrowed, and thus the efficiency of a laser lift off (LLO) process for the touch panel may be increased.

Hereinafter, a touch panel of a display device according to another embodiment (third embodiment) of the present invention will be described. The touch panel of the display device according to one embodiment of the present invention and the touch panel of the display device according to another embodiment (third embodiment) of the present invention have differences only in the shape of the second sub unit pattern and the sub connection pattern. So, only this is explained. In addition, overlapping contents of the touch panel of the display device according to one embodiment of the present invention and the display device according to another embodiment (third embodiment) of the present invention will be omitted, and the same reference numerals refer to the same elements. use.

12A is an enlarged plan view of a touch panel of a display device according to another embodiment (third embodiment) of the present invention.

FIG. 12B is a cross-sectional view taken along the cutting line XII-XII' shown in FIG. 12A.

Each of the plurality of stretched patterns may be composed of a plurality of unit patterns 511u. Specifically, as shown in FIGS. 12A and 12B, each of the plurality of unit patterns 511u constituting the plurality of stretched patterns is inside the first sub-unit pattern 511a and the first sub-unit pattern 511a. It may include a second sub-unit pattern 511b disposed and a third sub-unit pattern 511c disposed inside the second sub-unit pattern 511b.

For example, as shown in FIG. 12A , the first sub-unit pattern 511a may have a hexagonal shape. However, without being limited thereto, the first sub-unit pattern 511a may be transformed into a polygon such as an octagon or a circle.

And, the second sub unit pattern 511b may also have a hexagonal shape. However, it is not limited thereto and the second sub unit pattern 511b may also be transformed into a polygonal shape such as an octagon or a circular shape. However, since the second sub-unit pattern 511b is disposed inside the first sub-unit pattern 511a, the size of the second sub-unit pattern 511b may be smaller than that of the first sub-unit pattern 511a. .

In addition, the third sub unit pattern 511c may also have a hexagonal shape. However, it is not limited thereto and the third sub unit pattern 511c may also be transformed into a polygon such as an octagon or a circle. However, since the third sub-unit pattern 511c is disposed inside the second sub-unit pattern 511b, the size of the third sub-unit pattern 511c may be smaller than that of the second sub-unit pattern 511b. .

In addition, although FIG. 12A shows that an empty space exists inside the third sub-unit pattern 511c, it is not limited thereto, and the empty space may not exist inside the third sub-unit pattern 511c.

Accordingly, between the first sub-unit pattern 511a and the second sub-unit pattern 511b and between the second sub-unit pattern 511b and the third sub-unit pattern 511c are included in each of the plurality of unit patterns 511u. Since an empty space exists in , each of the plurality of unit patterns 511u may be stretched in the first direction (X) and the second direction (Y). Accordingly, each of the plurality of stretched patterns composed of the plurality of unit patterns 511u may also extend in the first direction (X) and the second direction (Y).

Further, in the touch panel of the display device according to another embodiment (third embodiment) of the present invention, the first sub-unit pattern 511a, the second sub-unit pattern 511b, and the third sub-unit pattern 511c A sub connection pattern 511d connecting the may be further included.

Accordingly, the first sub-unit pattern 511a, the second sub-unit pattern 511b, and the third sub-unit pattern 511c are physically connected, so that according to another embodiment (third embodiment) of the present invention, Even if the touch panel of the display device is stretched, it is not separated, so structural stability can be promoted.

Also, each of the plurality of unit electrodes 521u may be disposed on the first sub-unit pattern 511a. That is, each of the plurality of unit electrodes 521u may overlap the first sub-unit pattern 511a.

Accordingly, since an empty space exists inside each of the plurality of unit electrodes 521u, each of the plurality of unit electrodes 521u may be stretched and contracted in the first direction (X) and the second direction (Y). Accordingly, the plurality of touch electrodes composed of the plurality of unit electrodes 521u may also extend in the first direction (X) and the second direction (Y).

As described above, in the touch panel of the display device according to another embodiment (third embodiment) of the present invention, the stretchable touch electrode may be disposed on the stretchable touch pattern layer. Accordingly, the stretching reliability of the touch panel of the display device according to another embodiment (third embodiment) of the present invention may be improved.

In addition, as shown in FIG. 10B , the touch panel of the display device according to another embodiment (third embodiment) of the present invention has a second sub unit pattern 511b between the second filling layer 240 and the glass substrate. ), a third sub unit pattern 511c and a sub connection pattern 511d may be further disposed. Accordingly, a contact area between the second filling layer 240 and the glass substrate may be relatively narrowed, and thus the efficiency of a laser lift off (LLO) process for the touch panel may be increased.

Hereinafter, a touch panel of a display device according to another embodiment (fourth embodiment) of the present invention will be described. A touch panel of a display device according to an embodiment of the present invention and a touch panel of a display device according to another embodiment (fourth embodiment) of the present invention differ only in the shape of the second sub unit pattern and the sub connection pattern. So, only this is explained. In addition, overlapping contents of the touch panel of the display device according to one embodiment of the present invention and the display device according to another embodiment (the fourth embodiment) of the present invention are omitted, and the same reference numerals refer to the same components. use.

13A is an enlarged plan view of a touch panel of a display device according to another embodiment (fourth embodiment) of the present invention.

FIG. 13B is a cross-sectional view taken along the cutting line XIII-XIII′ shown in FIG. 13A.

Each of the plurality of stretched patterns may be composed of a plurality of unit patterns 611u. Specifically, as shown in FIGS. 13A and 13B , each of the plurality of unit patterns 611u constituting each of the plurality of stretch patterns is located inside the first sub-unit pattern 611a and the first sub-unit pattern 611a. A second sub-unit pattern 611b may be disposed.

For example, as shown in FIG. 13A , the first sub-unit pattern 611a may have a cross shape (+). However, without being limited thereto, the first sub-unit pattern 611a may be transformed into a polygonal shape such as an octagon or a circular shape.

Also, the second sub unit pattern 611b may have an X shape (X). Specifically, the four ends of the X-shaped second sub-unit pattern 611b may be connected to the inside of the first sub-unit pattern 611a.

Also, the unit pattern 611u including the first sub-unit pattern 611a and the second sub-unit pattern 611b may have a honeycomb shape. That is, the unit pattern 611u may have a hexagonal mesh shape.

Accordingly, an empty space exists between the first sub-unit pattern 611a and the second sub-unit pattern 611b inside each of the plurality of unit patterns 611u, so that each of the plurality of unit patterns 611u has a first sub-unit pattern 611u. It can be stretched in the direction (X) and the second direction (Y). Accordingly, each of the plurality of stretch patterns composed of the plurality of unit patterns 611u may also extend in the first direction (X) and the second direction (Y).

Also, each of the plurality of unit electrodes 621u may be disposed on the first sub-unit pattern 611a. That is, each of the plurality of unit electrodes 621u may overlap the first sub-unit pattern 611a.

Thus, since an empty space exists inside each of the plurality of unit electrodes 621u, each of the plurality of unit electrodes 621u may be stretched and contracted in the first direction (X) and the second direction (Y). Accordingly, the plurality of touch electrodes composed of the plurality of unit electrodes 621u may also extend in the first direction (X) and the second direction (Y).

As described above, in the touch panel of the display device according to another embodiment (the fourth embodiment) of the present invention, the stretchable touch electrode may be disposed on the stretchable touch pattern layer. Accordingly, the stretching reliability of the touch panel of the display device according to another embodiment (the fourth embodiment) of the present invention may be improved.

In addition, as shown in FIG. 13B , the touch panel of the display device according to another embodiment (fourth embodiment) of the present invention has a second sub-unit pattern 611b between the second filling layer 240 and the glass substrate. ) may be further arranged. Accordingly, a contact area between the second filling layer 240 and the glass substrate may be relatively narrowed, and thus the efficiency of a laser lift off (LLO) process for the touch panel may be increased.

Hereinafter, a touch panel of a display device according to another embodiment (fifth embodiment) of the present invention will be described. Since the touch panel of the display device according to one embodiment of the present invention and the touch panel of the display device according to another embodiment (fifth embodiment) of the present invention differ only in the touch pattern layer and the touch electrode layer, only these will be described. do. In addition, overlapping contents of the touch panel of the display device according to one embodiment of the present invention and the display device according to another embodiment (fifth embodiment) of the present invention will be omitted, and the same reference numerals refer to the same components. use.

14A is an enlarged plan view of a touch panel of a display device according to another embodiment (fifth embodiment) of the present invention.

FIG. 14B is a cross-sectional view taken along cutting lines A-A', B-B', and C-C' shown in FIG. 14A.

Referring to FIG. 14A , the touch pattern layer 710 includes a plurality of elongated patterns 711 and 712, and each of the plurality of elongated patterns 711 and 712 may be composed of a plurality of unit patterns 711u and 712u. there is. Specifically, the plurality of stretched patterns 711 and 712 include a first stretched pattern 711 on which the first touch electrode 721 is disposed and a second stretched pattern 712 on which the second touch electrode 722 is disposed. do. The first stretched pattern 711 is composed of a plurality of first unit patterns 711u, and the second stretched pattern 712 is composed of a plurality of second unit patterns 712u.

Each of the plurality of first unit patterns 711u constituting the first stretched pattern 711 includes a first sub-unit pattern 711a and a second sub-unit pattern 711b disposed inside the first sub-unit pattern 711a. can include

For example, as shown in FIG. 14A , the first sub-unit pattern 711a may have a rectangular shape with four curved sides. For example, the first sub-unit pattern 711a may be formed in a quadrangular shape by connecting four sine wave patterns to have four vertices. However, without being limited thereto, the first sub-unit pattern 711a may be transformed into a polygonal shape such as an octagon or a circular shape.

Also, the second sub-unit pattern 711b may have a circular shape smaller than the size of the first sub-unit pattern 711a. However, it is not limited thereto, and the second sub unit pattern 711b may also be transformed into a polygon such as a quadrangle. In addition, in FIG. 14A, it is illustrated that no empty space exists inside the second sub-unit pattern 711b, but an empty space may exist inside the second sub-unit pattern 711b, but is not limited thereto.

The plurality of second unit patterns 712u constituting the second stretched pattern 712 may have substantially the same structure as the plurality of first unit patterns 711u. Each of the plurality of second unit patterns 712u may include a third sub-unit pattern 712a and a fourth sub-unit pattern 712b disposed inside the third sub-unit pattern 712a.

The third sub-unit pattern 712a has the same structure as the first sub-unit pattern 711a and may have a rectangular shape with four curved sides. For example, the third sub-unit pattern 712a may be formed in a quadrangular shape by connecting four sine wave patterns to have four vertices. However, it is not limited thereto and the third sub unit pattern 712a may be transformed into a polygon such as an octagon or a circle.

The fourth sub-unit pattern 712b may have the same structure as the second sub-unit pattern 711b and may have a circular shape smaller than the size of the third sub-unit pattern 712a. However, it is not limited thereto, and the fourth sub unit pattern 712b may also be transformed into a polygon such as a square. In addition, although it is illustrated that no empty space exists inside the fourth sub-unit pattern 712b in FIG. 14A, an empty space may exist inside the fourth sub-unit pattern 712b, but is not limited thereto.

Accordingly, since each of the plurality of unit patterns 711u and 712u has an empty space therein, each of the plurality of unit patterns 711u and 712u may be stretched in the first direction (X) and the second direction (Y). there is.

Also, the touch pattern layer 710 may include a first connection pattern 713 connecting the plurality of elongated patterns 711 and 712 disposed in the first direction (X). Meanwhile, although not shown in FIG. 14A , a second connection pattern connecting a plurality of first stretched patterns 711 adjacent to each other in the second direction Y may be disposed as shown in FIG. 8 .

The touch pattern layer 710 may further include a plurality of island patterns 715 disposed between the plurality of stretched patterns 711 and 712 . The plurality of island patterns 715 may be disposed in an area between the first stretched pattern 711 and the second stretched pattern 712 . The island pattern 715 may be disposed in a space between the first stretched pattern 711 and the first connection pattern 713 and between the first connection pattern 713 and the second stretched pattern 712 . The island pattern 715 may have a circular shape, but is not limited thereto and may be transformed into a polygonal shape such as a quadrangle. In addition, although it is illustrated that no empty space exists inside the island pattern 715 in FIG. 14A, an empty space may exist inside the island pattern 715, but is not limited thereto.

Meanwhile, the first connection pattern 713, the island pattern 715, the second sub unit pattern 711b, and the fourth sub unit pattern 712b on which the touch electrode layer 720 is not disposed are the second filling layer 240. It is a pattern for reducing the area in contact with the glass substrate. Accordingly, the first connection pattern 713, the island pattern 715, the second sub unit pattern 711b, and the fourth sub unit pattern 712b are additionally disposed in the remaining area where the touch electrode layer 720 is not disposed. , The contact area between the second filling layer 240 and the glass substrate can be reduced, and the efficiency of a laser lift off (LLO) process for the touch panel can be increased.

Referring to FIGS. 14A and 14B , each of the plurality of touch electrodes 721 and 722 may include a plurality of unit electrodes 721u and 722u. For example, the first touch electrode 721 may include a plurality of first unit electrodes 721u. Also, the second touch electrode 722 may include a plurality of second unit electrodes 722u. Each of the plurality of unit electrodes 721u and 722u may be disposed on the first sub-unit pattern 711a and the third sub-unit pattern 712a, that is, each of the plurality of unit electrodes 721u and 722u may have a first It may overlap with the sub unit pattern 711a and the third sub unit pattern 712a.

Thus, an empty space exists inside each of the plurality of unit electrodes 721u and 722u, and the plurality of unit electrodes 721u and 722u may be stretched in the first direction (X) and the second direction (Y). . Therefore, the first touch electrode 721 composed of a plurality of first unit electrodes 721u and the second touch electrode 722 composed of a plurality of second unit electrodes 722u are also formed in the first direction (X) and It can be extended in two directions (Y).

Referring to FIG. 14B , a plurality of first touch electrodes 721 adjacent in the first direction X may be connected to each other through a bridge wire 723 . The bridge wires 723 extending in the first direction X may be disposed on the first connection pattern 713 and the second elongation pattern 712 to electrically connect adjacent first touch electrodes 721 to each other. For example, a first connection pattern 713 connecting the first stretched pattern 711 and the second stretched pattern 712 and a first connection pattern 713 disposed between the first connection pattern 713 and the first connection pattern 713. A bridge wire 723 may be disposed on the two-stretched pattern 712 .

The bridge wiring 723 may be disposed on the same layer as the plurality of first touch electrodes 721 . Accordingly, the bridge wiring 723 and the plurality of first touch electrodes 721 may be integrally formed and electrically connected to each other.

Most of the plurality of second touch electrodes 722 may be disposed on the same layer as the plurality of first touch electrodes 721 and the bridge wiring 723 . However, since the bridge wiring 723 extending in the first direction (X) and the second touch electrode 722 extending in the second direction (Y) are disposed to cross each other, among the plurality of second touch electrodes 722 Some of the second touch electrodes 722 adjacent to the bridge wiring 723 are disposed on a different layer from the plurality of first touch electrodes 721 and the bridge wiring 723, so that the plurality of first touch electrodes 721 and the bridge wiring (723) and can be insulated.

For example, referring to FIG. 14B , a touch insulating layer (TIN) is formed on the touch pattern layer 710 and the bridge wire 723 in an area where the bridge wire 723 is disposed and an area adjacent to the bridge wire 723. and a second touch electrode 722 may be disposed on the touch insulating layer TIN. Therefore, the first touch electrode 721 and the second touch electrode 722 to which different signals are applied are insulated by the touch insulating layer TIN disposed between the second touch electrode 722 and the bridge wire 723. It can be.

Meanwhile, in FIG. 14B , the touch insulating layer (TIN) is shown as being disposed on a region overlapping the bridge wiring 723 and one second stretched pattern 712 closest to the bridge wiring 723, but touch insulation The area of the second stretched pattern 712 on which the layer TIN is disposed may be larger, but is not limited thereto.

The arrangement structure of the bridge wiring 723 and the plurality of touch electrodes 721 and 722 of the display device according to another embodiment (fifth embodiment) described with reference to FIGS. 14A and 14B is illustrated in FIGS. A touch panel of a display device according to an embodiment of the present invention shown in FIG. 9B, a touch panel of a display device according to another embodiment shown in FIGS. 11A and 11B, and another embodiment of the present invention shown in FIGS. 12A and 12B ( It can also be applied to the touch panel of the display device according to the third embodiment) and the touch panel of the display device according to another embodiment (the fourth embodiment) of FIGS. 13A and 13B .

Hereinafter, a method of manufacturing a touch panel of a display device according to another embodiment (the fifth embodiment) of the present invention will be described.

15A to 15E are process charts for explaining a method of manufacturing a touch panel of a display device according to another embodiment (fifth embodiment) of the present invention.

Referring to FIG. 15A , a sacrificial pattern and a pattern material layer 710m are formed on a glass substrate. The pattern material layer 710m may be etched in a subsequent process to form the touch pattern layer 710 .

A plurality of first unit electrodes 721u of a plurality of first touch electrodes 721 and a bridge wiring 723 are formed on the pattern material layer 710m. A metal layer may be formed on the pattern material layer 710m, and the metal layer may be etched to form the plurality of first unit electrodes 721u and the bridge wiring 723 together.

Next, a touch insulating layer TIN is formed on the plurality of first touch electrodes 721 and the bridge wiring 723 . The touch insulating layer TIN may be formed to cover at least the bridge wiring 723 . Also, the touch insulating layer TIN may be formed in an area adjacent to the bridge wiring 723 among areas where the second touch electrode 722 is to be formed.

Next, referring to FIG. 15B , a plurality of second touch electrodes 722 including a plurality of second unit electrodes 722u are formed on the touch insulating layer TIN and the pattern material layer 710m. The second unit electrode 722u is formed on the pattern material layer 710m in an area relatively far from the bridge wiring 723, and the second unit electrode 722u touches the area relatively adjacent to the bridge wiring 723. It may be formed on the insulating layer TIN. A part of the second unit electrode 722u formed to overlap the bridge wiring 723 may be formed on the touch insulating layer TIN and may be insulated from the bridge wiring 723 .

Subsequently, referring to FIG. 15C , a masking layer ML is formed on the touch electrode layer 720 including the first touch electrode 721, the second touch electrode 722, and the bridge wiring 723, and the masking layer The pattern material layer 710m is etched using (ML). For example, the touch pattern layer 710 may be formed by etching a partial area of the pattern material layer 710m on which the masking layer ML is not formed through a dry etching process. The masking layer ML may be formed of an oxide film such as indium tin oxide (ITO), but is not limited thereto.

Next, referring to FIG. 15D , the masking layer ML is removed, and the second filling layer 240 and the touch substrate 230 are formed on the touch pattern layer 710 and the touch electrode layer 720 . The second filling layer 240 may contact the touch pattern layer 710, the touch electrode layer 720, the sacrificial pattern, and the glass substrate, and the touch substrate 230 may cover the entire surface of the second filling layer 240. there is.

Finally, referring to FIG. 15E, a laser lift off (LLO) process is performed to separate the glass substrate and the sacrificial pattern by irradiating a laser on the lower portion of the glass substrate. A display device may be formed by attaching the touch pattern layer 710 and the touch electrode layer 720 separated from the glass substrate to a display panel.

At this time, the second sub unit pattern 711b, the fourth sub unit pattern 712b, the first connection pattern 713 and the island pattern 715 are disposed between the glass substrate and the second filling layer 240, A contact area between the glass substrate and the second filling layer 240 may be reduced. Accordingly, a contact area between the second filling layer 240 and the glass substrate is reduced, and the efficiency of a laser lift off (LLO) process for the touch panel may be increased.

In the touch panel of the display device according to another embodiment (fifth embodiment) of the present invention, the first touch electrode 721 and the bridge wiring 723 may be formed on the same layer. A second touch electrode 722 is formed on the first touch electrode 721 and the bridge wire 723, and a touch insulating layer (TIN) is formed in a region where the second touch electrode 722 and the bridge wire 723 intersect. ) may be formed to insulate the second touch electrode 722 , the bridge wiring 723 , and the first touch electrode 721 . Accordingly, a touch input may be sensed by applying different signals to each of the plurality of first touch electrodes 721 and the plurality of second touch electrodes 722 .

Hereinafter, a touch panel of a display device according to another embodiment (sixth embodiment) of the present invention will be described. A touch panel of a display device according to another embodiment (fifth embodiment) and a touch panel of a display device according to another embodiment (sixth embodiment) include a first touch electrode, a second touch Since there are differences only in electrode and bridge wiring, only these are described. In addition, overlapping contents of the touch panel of the display device according to another embodiment (fifth embodiment) of the present invention and the display device according to another embodiment (sixth embodiment) of the present invention are omitted, and the same Components use the same reference numerals.

16A is an enlarged plan view of a touch panel of a display device according to another embodiment (sixth embodiment) of the present invention.

FIG. 16B is a cross-sectional view taken along the cutting lines A-A', B-B', and C-C' shown in FIG. 16A.

16A and 16B, the touch pattern layer 810 includes a plurality of elongated patterns 811 and 812, and each of the plurality of elongated patterns 811 and 812 forms a plurality of unit patterns 811u and 812u. can be configured. Specifically, the plurality of stretched patterns 811 and 812 include a first stretched pattern 811 on which the first touch electrode 821 is disposed and a second stretched pattern 812 on which the second touch electrode 822 is disposed. do. The first stretched pattern 811 is composed of a plurality of first unit patterns 811u, and the second stretched pattern 812 is composed of a plurality of second unit patterns 812u.

Each of the plurality of first unit patterns 811u constituting the first stretched pattern 811 includes a first sub-unit pattern 811a and a second sub-unit pattern 811b disposed inside the first sub-unit pattern 811a. can include

For example, as shown in FIG. 16A , the first sub-unit pattern 811a may have a rectangular shape with four curved sides. For example, the first sub-unit pattern 811a may be formed in a quadrangular shape by connecting four sine wave patterns to have four vertices. However, without being limited thereto, the first sub unit pattern 811a may be transformed into a polygon such as an octagon or a circle.

Also, the second sub-unit pattern 811b may have a circular shape smaller than the size of the first sub-unit pattern 811a. However, it is not limited thereto, and the second sub unit pattern 811b may also be transformed into a polygon such as a quadrangle. In addition, although it is illustrated that no empty space exists inside the second sub-unit pattern 811b in FIG. 16A, an empty space may exist inside the second sub-unit pattern 811b, but is not limited thereto.

The plurality of second unit patterns 812u constituting the second stretched pattern 812 may have substantially the same structure as the plurality of first unit patterns 811u. Each of the plurality of second unit patterns 812u may include a third sub-unit pattern 812a and a fourth sub-unit pattern 812b disposed inside the third sub-unit pattern 812a.

The third sub-unit pattern 812a has the same structure as the first sub-unit pattern 811a and may have a rectangular shape with four curved sides. For example, the third sub-unit pattern 812a may be formed in a quadrangular shape by connecting four sine wave patterns to have four vertices. However, without being limited thereto, the third sub unit pattern 812a may be transformed into a polygon such as an octagon or a circular shape.

The fourth sub-unit pattern 812b may have the same structure as the second sub-unit pattern 811b and may have a circular shape smaller than the size of the third sub-unit pattern 812a. However, it is not limited thereto, and the fourth sub unit pattern 812b may also be transformed into a polygon such as a quadrangle. In addition, although it is illustrated that no empty space exists inside the fourth sub-unit pattern 812b in FIG. 16A, an empty space may exist inside the fourth sub-unit pattern 812b, but is not limited thereto.

Accordingly, each of the plurality of unit patterns 811u and 812u has an empty space therein, so that each of the plurality of unit patterns 811u and 812u can be stretched in the first direction (X) and the second direction (Y). there is.

Also, the touch pattern layer 810 may include a first connection pattern 813 connecting the plurality of elongated patterns 811 and 812 disposed in the first direction (X). Meanwhile, although not shown in FIG. 16A , a second connection pattern connecting a plurality of first stretched patterns 811 adjacent to each other in the second direction Y may be disposed as shown in FIG. 8 .

The touch pattern layer 810 may further include a plurality of island patterns 815 disposed between the plurality of stretched patterns 811 and 812 . The plurality of island patterns 815 may be disposed in a region between the first stretched pattern 811 and the second stretched pattern 812 . The island pattern 815 may be disposed in a space between the first stretched pattern 811 and the first connection pattern 813 and between the first connection pattern 813 and the second stretched pattern 812 . The island pattern 815 may have a circular shape, but is not limited thereto and may be transformed into a polygonal shape such as a quadrangle. Also, although it is shown that no empty space exists inside the island pattern 815 in FIG. 16A, an empty space may exist inside the island pattern 815, but is not limited thereto.

Meanwhile, the first connection pattern 813, the island pattern 815, the second sub-unit pattern 811b, and the fourth sub-unit pattern 812b on which the touch electrode layer 720 is not disposed are formed during manufacture of the touch panel. This is a pattern for reducing the contact area between the filling layer 240 and the glass substrate. Therefore, the first connection pattern 813, the island pattern 815, the second sub unit pattern 811b, and the fourth sub unit pattern 812b are additionally disposed in the remaining area where the touch electrode layer 820 is not disposed. , The contact area between the second filling layer 240 and the glass substrate can be reduced, and the efficiency of a laser lift off (LLO) process for the touch panel can be increased.

Referring to FIGS. 16A and 16B , a plurality of touch electrodes 821 and 822 are disposed on the plurality of first stretched patterns 811 and the plurality of second stretched patterns 812 . Each of the plurality of touch electrodes 821 and 822 may include a plurality of unit electrodes 821u and 822u. For example, the first touch electrode 821 may include a plurality of first unit electrodes 821u. Also, the second touch electrode 822 may include a plurality of second unit electrodes 822u. Each of the plurality of unit electrodes 821u and 822u may be disposed on the first sub-unit pattern 811a and the third sub-unit pattern 812a, that is, each of the plurality of unit electrodes 821u and 822u may have a first It may overlap with the sub unit pattern 811a and the third sub unit pattern 812a.

Accordingly, an empty space exists inside each of the plurality of unit electrodes 821u and 822u, and the plurality of unit electrodes 821u and 822u may be stretched and contracted in the first direction X and the second direction Y. . Therefore, the first touch electrode 821 composed of a plurality of first unit electrodes 821u and the second touch electrode 822 composed of a plurality of second unit electrodes 822u are also formed in the first direction (X) and It can be extended in two directions (Y).

Referring to FIG. 16B , a plurality of first touch electrodes 821 adjacent in the first direction X may be connected to each other through a bridge wire 823 . The bridge wires 823 extending in the first direction X may be disposed on the first connection pattern 813 and the second elongation pattern 812 to electrically connect adjacent first touch electrodes 821 to each other. For example, a first connection pattern 813 connecting the first stretched pattern 811 and the second stretched pattern 812 and a first connection pattern 813 disposed between the first connection pattern 813 and the first connection pattern 813. A bridge wire 823 may be disposed on the two-stretched pattern 812 .

The plurality of first touch electrodes 821 and the plurality of second touch electrodes 822 are disposed on the same layer, and the bridge wiring 823 includes the plurality of first touch electrodes 821 and the plurality of second touch electrodes 822 . ) and can be placed on different floors. At least a portion of each of the plurality of second touch electrodes 822 formed on the same layer may be integrally formed and connected to each other. In addition, each of the plurality of first touch electrodes 821 is connected to the adjacent first touch electrode 821 in the first direction (X) so that a touch driving signal may be applied. However, since the second touch electrodes 822 are disposed between each of the plurality of first touch electrodes 821 in the first direction X, at least a portion of the first touch electrodes 821 may be integrally formed and connected to each other. and may be electrically connected to each other through a separate bridge wire 823.

At this time, the bridge wiring 823 extending in the first direction (X) and electrically connecting the first touch electrodes 821 adjacent to each other in the first direction (X) extends in the second direction (Y). It may be disposed to cross the touch electrode 822 . A touch insulating layer TIN is formed on some of the second touch electrodes 822 adjacent to the bridge wiring 823 among the plurality of second touch electrodes 822, and the plurality of second touch electrodes 822 and the bridge wiring ( 823) may be insulated.

For example, referring to FIG. 16B , on the touch pattern layer 810 and the plurality of touch electrodes 821 and 822 in an area where the bridge wire 823 is disposed and an area adjacent to the area where the bridge wire 823 is disposed. A touch insulating layer TIN may be disposed on the touch insulating layer TIN, and a bridge wire 823 may be disposed on the touch insulating layer TIN. Therefore, the first touch electrode 821 and the second touch electrode 822 to which different signals are applied are insulated by the touch insulating layer TIN disposed between the second touch electrode 822 and the bridge wire 823. It can be.

Meanwhile, although FIG. 16B shows that the touch insulating layer TIN is disposed in an area overlapping the bridge wiring 823, the area of the plurality of stretched patterns 811 and 812 on which the touch insulating layer TIN is disposed is further increased. It may be many, but is not limited thereto.

The arrangement structure of the bridge wiring 823 and the plurality of touch electrodes 821 and 822 of the display device according to another embodiment (sixth embodiment) described with reference to FIGS. 16A and 16B is illustrated in FIGS. A touch panel of a display device according to an embodiment of the present invention shown in FIG. 9B, a touch panel of a display device according to another embodiment shown in FIGS. 11A and 11B, and another embodiment of the present invention shown in FIGS. 12A and 12B ( It can also be applied to the touch panel of the display device according to the third embodiment) and the touch panel of the display device according to another embodiment (the fourth embodiment) of FIGS. 13A and 13B .

Hereinafter, a method of manufacturing a touch panel of a display device according to another embodiment (the sixth embodiment) of the present invention will be described.

17A to 17E are process charts for explaining a method of manufacturing a touch panel of a display device according to another embodiment (sixth embodiment) of the present invention.

Referring to FIG. 17A , a sacrificial pattern and a pattern material layer 810m are formed on a glass substrate. The pattern material layer 810m may be etched in a subsequent process to form the touch pattern layer 810 .

Then, a plurality of first unit electrodes 821u of the plurality of first touch electrodes 821 and a plurality of second unit electrodes 822u of the plurality of second touch electrodes 822 are formed on the pattern material layer 810m. do. A metal layer may be formed on the pattern material layer 810m and the metal layer may be etched to form a plurality of first unit electrodes 821u and a plurality of second unit electrodes 822u together.

Next, a touch insulating layer TIN is formed on the plurality of first touch electrodes 821 and the plurality of second touch electrodes 822 . The touch insulating layer TIN may be formed at least in a region where the bridge wiring 823 is to be formed. A contact hole may be formed in the touch insulating layer TIN formed to cover the first unit electrode 821u connected to the bridge wire 823 among the touch insulating layers TIN. Also, the touch insulating layer TIN may be formed to cover the plurality of second unit electrodes 822u crossing the bridge wiring 823 .

Next, referring to FIG. 17B , a bridge wire 823 is formed on the touch insulating layer TIN. The bridge wiring 823 may be electrically connected to the first unit electrode 821u through a contact hole formed in the touch insulating layer TIN. Also, the bridge wiring 823 may be insulated from the second unit electrode 823u by the touch insulating layer TIN.

Subsequently, referring to FIG. 17C , a masking layer ML is formed on the touch electrode layer 820 including the first touch electrode 821, the second touch electrode 822, and the bridge wiring 823, and the masking layer The pattern material layer 810m is etched using (ML). For example, the touch pattern layer 810 may be formed by etching a partial area of the pattern material layer 810m on which the masking layer ML is not formed through a dry etching process. The masking layer ML may be formed of an oxide film such as indium tin oxide (ITO), but is not limited thereto.

Next, referring to FIG. 17D , the masking layer ML is removed, and the second filling layer 240 and the touch substrate 230 are formed on the touch pattern layer 810 and the touch electrode layer 820 . The second filling layer 240 may contact the touch pattern layer 810, the touch electrode layer 820, the sacrificial pattern, and the glass substrate, and the touch substrate 230 may cover the entire surface of the second filling layer 240. there is.

Finally, referring to FIG. 17E, a laser lift off (LLO) process is performed to separate the glass substrate and the sacrificial pattern by irradiating a laser on the lower portion of the glass substrate. A display device may be formed by attaching the touch pattern layer 810 and the touch electrode layer 820 separated from the glass substrate to the display panel.

At this time, the second sub-unit pattern 811b, the fourth sub-unit pattern 812b, the first connection pattern 813 and the island pattern 815 are disposed between the glass substrate and the second filling layer 240, A contact area between the glass substrate and the second filling layer 240 may be reduced. Accordingly, a contact area between the second filling layer 240 and the glass substrate is reduced, and the efficiency of a laser lift off (LLO) process for the touch panel may be increased.

In the touch panel of the display device according to another embodiment (sixth embodiment) of the present invention, the first touch electrode 821 and the second touch electrode 822 may be formed on the same layer. And, in order to electrically connect the first touch electrodes 821 adjacent to each other in the first direction (X), a second touch electrode 822 is formed on the first touch electrode 821 and the second touch electrode 822. A bridge wiring 823 disposed across the bridge may be formed. At this time, a touch insulating layer (TIN) is formed in an area where the second touch electrode 822 and the bridge wire 823 intersect, so that the second touch electrode 822, the bridge wire 823 and the first touch electrode 821 are formed. ) can be insulated. Accordingly, a touch input may be sensed by applying different signals to each of the plurality of first touch electrodes 821 and the plurality of second touch electrodes 822 .

A touch panel and a display device including the touch panel according to various embodiments of the present disclosure can be described as follows.

A touch panel according to an embodiment of the present invention includes a touch pattern layer having a plurality of elongated patterns and a touch electrode layer disposed on the touch pattern layer and having a plurality of touch electrodes, and each of the plurality of elongated patterns includes a plurality of elongated patterns. It is composed of a unit pattern of, each of a plurality of touch electrodes is composed of a plurality of unit electrodes, each of the plurality of unit patterns is disposed inside the first sub-unit pattern and the first sub-unit overlapping the plurality of unit electrode electrodes Including the second sub-unit pattern, laser lift off (LLO) process efficiency for the touch panel may be increased.

According to another feature of the present invention, each of the plurality of unit electrodes may have a hexagonal shape, and the first sub unit pattern may have a hexagonal shape.

According to another feature of the present invention, the second sub-unit pattern may have a mesh shape.

According to another feature of the present invention, the second sub-unit pattern may be a hexagon having a smaller size than the first sub-unit pattern.

According to another feature of the present invention, each of the plurality of unit patterns may further include a sub connection pattern connecting the first sub unit pattern and the second sub unit pattern.

According to another feature of the present invention, each of the plurality of unit patterns may further include a third sub unit pattern disposed inside the second sub unit.

According to another feature of the present invention, the third sub-unit pattern may be a hexagon having a smaller size than the second sub-unit pattern.

According to another feature of the present invention, each of the plurality of unit patterns may further include a sub connection pattern connecting the first sub unit pattern, the second sub unit pattern, and the third sub unit pattern.

According to another feature of the present invention, each of the plurality of unit patterns may have a hexagonal mesh shape.

According to another feature of the present invention, the plurality of touch electrodes may include a plurality of first touch electrodes extending in a first direction and a plurality of second touch electrodes extending in a second direction.

According to another feature of the present invention, the touch electrode layer may further include a bridge wire connecting the plurality of first touch electrodes.

According to another feature of the present invention, a touch insulating layer disposed between the bridge wiring and the plurality of second touch electrodes may be further included.

According to another feature of the present invention, the plurality of first touch electrodes are disposed on the same layer as the bridge wiring, and at least some of the plurality of second touch electrodes are disposed on the touch insulating layer to cross the bridge wiring.

According to another feature of the present invention, the plurality of first touch electrodes are disposed on the same layer as the plurality of second touch electrodes, and the bridge wiring is disposed on the touch insulating layer to cross the plurality of second touch electrodes. .

According to another feature of the present invention, the plurality of stretched patterns may include a plurality of first stretched patterns overlapping a plurality of first touch electrodes and a plurality of second stretched patterns overlapping a plurality of second touch electrodes.

According to another feature of the present invention, the touch pattern layer further includes a first connection pattern connecting a plurality of elongated patterns disposed in a first direction and a second connection pattern connecting a plurality of elongated patterns disposed in a second direction. can be provided

Although the embodiments of the present invention have been described in more detail, the present invention is not necessarily limited to these embodiments, and may be variously modified and implemented without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: display device
111: lower substrate
112: upper board
120: pattern layer
121 First plate pattern
122: first wiring pattern
123 Second plate pattern
124: second wiring pattern
141: buffer layer
142: gate insulating layer
143: first interlayer insulating layer
144: second interlayer insulating layer
145: passivation layer
146: planarization layer
147: bank
150: switching transistor
160: driving transistor
151, 161: gate electrode
152, 162: active layer
153: source electrode
154, 164: drain electrode
170: LEDs
171: n-type layer
172: active layer
173: p-type layer
174: p-electrode
175: n-electrode
181: first connection wire
182: second connection wire
190: filling layer
PX: pixels
SPX: sub-pixel
GD: Gate Driver
DD: Data Driver
GP: Gate Pad
DP: data pad
PCB: printed circuit board
PS: power supply
AA: display area
NA: non-display area
LED: light emitting element
VP: voltage pad
CNT1: first connection pad
CNT2: second connection pad
200: touch panel
210, 710, 810: touch pattern layer
211, 711, 811: first stretching pattern
212, 712, 812: second stretching pattern
213, 713, 813: first connection pattern
214: second connection pattern
715, 815: island pattern
220, 720, 820: touch electrode layer
221, 721, 821: first touch electrode
222, 722, 822: second touch electrode
223, 723, 823: bridge wiring
224: first routing wire
225: second routing wire
211u, 411u, 511u, 611u: unit pattern
711u, 811u: first unit pattern
712u, 812u: second unit pattern
221u, 421u, 521u, 621u: unit electrode
721u, 821u: first unit electrode
722u, 822u: second unit electrode

Claims (17)

a touch pattern layer having a plurality of stretched patterns; and
A touch electrode layer disposed on the touch pattern layer and having a plurality of touch electrodes;
Each of the plurality of stretching patterns is composed of a plurality of unit patterns,
Each of the plurality of touch electrodes is composed of a plurality of unit electrodes,
Each of the plurality of unit patterns,
A first sub-unit pattern overlapping the plurality of unit electrode electrodes; and
A touch panel comprising a second sub-unit pattern disposed inside the first sub-unit. According to claim 1,
Each of the plurality of unit electrodes is hexagonal,
The first sub-unit pattern is a hexagon, the touch panel. According to claim 2,
The second sub-unit pattern is a mesh shape, the touch panel. According to claim 2,
The second sub-unit pattern is a hexagon having a smaller size than the first sub-unit pattern, the touch panel. According to claim 4,
Each of the plurality of unit patterns,
The touch panel further comprises a sub connection pattern connecting the first sub unit pattern and the second sub unit pattern. According to claim 4,
Each of the plurality of unit patterns,
The touch panel further comprising a third sub-unit pattern disposed inside the second sub-unit. According to claim 6,
The third sub-unit pattern is a hexagon having a smaller size than the second sub-unit pattern, the touch panel. According to claim 6,
Each of the plurality of unit patterns,
The touch panel further comprises a sub connection pattern connecting the first sub unit pattern, the second sub unit pattern, and the third sub unit pattern. According to claim 1,
Each of the plurality of unit patterns is in the form of a hexagonal mesh, a touch panel. According to claim 1,
The plurality of touch electrodes
a plurality of first touch electrodes extending in a first direction;
A touch panel comprising a plurality of second touch electrodes extending in a second direction. According to claim 10,
The touch electrode layer is
The touch panel further comprises a bridge wire connecting the plurality of first touch electrodes. According to claim 11,
The touch panel further includes a touch insulating layer disposed between the bridge wiring and the plurality of second touch electrodes. According to claim 12,
The plurality of first touch electrodes are disposed on the same layer as the bridge wiring,
At least some of the plurality of second touch electrodes are disposed on the touch insulating layer and intersect the bridge wiring. According to claim 12,
The plurality of first touch electrodes are disposed on the same layer as the plurality of second touch electrodes;
The bridge wiring is disposed on the touch insulating layer and crosses the plurality of second touch electrodes, the touch panel. According to claim 10,
The plurality of stretching patterns
A plurality of first stretch patterns overlapping the plurality of first touch electrodes;
A touch panel comprising a plurality of second stretched patterns overlapping the plurality of second touch electrodes. According to claim 1,
The touch pattern layer
A first connection pattern connecting a plurality of stretched patterns disposed in a first direction, and
A touch panel further comprising a second connection pattern connecting a plurality of stretched patterns arranged in a second direction. A display device including an extensible display panel and an extensible touch panel,
The touch panel,
a touch pattern layer having a plurality of stretched patterns; and
A touch electrode layer disposed on the touch pattern layer and having a plurality of touch electrodes;
Each of the plurality of stretching patterns is composed of a plurality of unit patterns,
Each of the plurality of touch electrodes is composed of a plurality of unit electrodes,
Each of the plurality of unit patterns,
A first sub-unit pattern overlapping the plurality of unit electrode electrodes; and
A display device comprising a second sub-unit pattern disposed inside the first sub-unit.

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