KR102443918B1 - Flexible display device - Google Patents

Abstract

The flexible display device includes a display panel providing a base surface and a touch screen disposed on the base surface. The touch screen is disposed on the base surface and includes a noise shielding conductive layer overlapping the non-emission region, a first insulating layer covering the noise shielding conductive layer, first conductive patterns overlapping a portion of the noise shielding conductive layer, and a first insulation a second insulating layer disposed on the layer; second conductive patterns disposed on the second insulating layer and overlapping a portion of the noise shielding conductive layer; and a third insulating layer disposed on the second insulating layer.

Description

Flexible display device {FLEXIBLE DISPLAY DEVICE}

The present invention relates to a flexible display device, and more particularly, to a touch screen integrated flexible display device.

Electronic devices such as smart phones, digital cameras, notebook computers, navigation systems, and smart televisions are being developed. These electronic devices are provided with a display device to provide information.

As electronic devices change into various shapes, the shapes of display devices are correspondingly changed. Existing electronic devices have a flat panel display device. Recently developed electronic devices require flexible display devices such as curved, bending, and rolling types.

In addition, consumers demand slimmer electronic devices. To implement this, various functional members are being integrated into the display device.

Accordingly, an object of the present invention is to provide a flexible display device having a touch screen with improved touch sensitivity.

A flexible display device according to an embodiment of the present invention provides a base surface, a display panel including a plurality of light emitting areas and a non-emission area adjacent to the plurality of light emitting areas, and a touch screen disposed on the base surface includes

The touch screen includes a noise shielding conductive layer disposed on the base surface and overlapping the non-emission area, a first insulating layer disposed on the base surface and covering the noise shielding conductive layer, and on the first insulating layer first conductive patterns disposed on and overlapping a portion of the noise shielding conductive layer, a second insulating layer disposed on the first insulating layer, and a portion of the noise shielding conductive layer disposed on the second insulating layer It includes overlapping second conductive patterns and a third insulating layer disposed on the second insulating layer.

The first insulating layer may include a first overcoat layer that provides a first flat surface on which the first conductive patterns are disposed.

The second insulating layer may include a plurality of color filters each overlapping a corresponding emission region among the plurality of emission regions.

An edge of each of the plurality of color filters may overlap the non-emission area.

The second insulating layer may further include a second overcoat layer that covers the plurality of color filters and provides a second flat surface on which the second conductive patterns are disposed.

The second insulating layer may further include a black matrix disposed on the first flat surface, covering the first conductive patterns, and having openings corresponding to the plurality of light emitting regions defined.

The third insulating layer may cover the second conductive patterns, and openings corresponding to the plurality of light emitting regions may be defined.

The first insulating layer may include a plurality of color filters each overlapping a corresponding emission region among the plurality of emission regions.

The second insulating layer may include an overcoat layer that provides a flat surface on which the second conductive patterns are disposed.

The second insulating layer may further include a black matrix disposed on the plurality of color filters, covering the first conductive patterns, and defining openings corresponding to the plurality of light emitting regions. The overcoat layer may cover the black matrix.

At least one of the first insulating layer, the second insulating layer, and the third insulating layer may include a hard coating layer.

The noise shielding conductive layer may include first mesh lines defining first openings corresponding to the plurality of light emitting regions. The first conductive patterns may include second mesh lines defining second openings corresponding to the plurality of light emitting regions. The line widths of the first mesh lines are greater than the line widths of the second mesh lines.

It may further include a window member disposed on the touch screen and a transparent optical adhesive member for coupling the window member and the touch screen. The window member may include a base member and a hard coating layer disposed on the base member.

The noise shielding conductive layer may receive a ground voltage.

The display panel may include a base substrate, a circuit layer disposed on the base substrate, an organic light emitting device layer disposed on the circuit layer, and a thin film encapsulation layer encapsulating the organic light emitting device layer. The thin film encapsulation layer may provide the base surface.

A flexible display device according to an embodiment of the present invention provides a base surface and is defined as a plurality of light emitting areas and a non-emission area adjacent to the plurality of light emitting areas, and is disposed on the base surface to overlap the non-emission area. and a display panel including a noise shielding conductive layer, a touch screen disposed on the noise shielding conductive layer, and a transparent optical adhesive member coupling the base surface and the touch screen.

The touch screen may include a base member, first conductive patterns disposed on the base member and overlapping noise shielding conductive layers of some of the noise shielding conductive layers, and disposed on the base member, a first insulating layer covering, second conductive patterns disposed on the second insulating layer and overlapping some of the noise shielding conductive layers of the noise shielding conductive layer, and a second insulating layer disposed on the first insulating layer layers may be included.

Any one of the first insulating layer and the second insulating layer may include a plurality of color filters overlapping a corresponding emission region among the plurality of emission regions.

At least one of the first insulating layer and the second insulating layer may include a black matrix in which openings corresponding to the plurality of light emitting regions are defined.

Each of the noise shielding conductive layer, the first conductive patterns, and the second conductive patterns may have a mesh shape in which openings corresponding to the plurality of light emitting regions are defined.

As described above, since the noise shielding conductive layer overlaps the first conductive patterns and the second conductive patterns, it is possible to prevent noise generated from the display panel from interfering with the first conductive patterns and the second conductive patterns.

Since the touch electrodes have a mesh shape, tensile stress/compressive stress applied to the touch electrodes is reduced, and as a result, cracks of the touch electrodes can be prevented.

Color filters reduce external and reflectance by filtering out external light. Since the insulating layer of the touch screen includes color filters, the display device becomes slim.

1A is a perspective view illustrating a first operation of a flexible display device according to an exemplary embodiment of the present invention.
1B is a perspective view illustrating a second operation of the flexible display device according to an exemplary embodiment of the present invention.
2A is a cross-sectional view illustrating a first operation of a flexible display device according to an exemplary embodiment of the present invention.
2B is a cross-sectional view illustrating a second operation of the flexible display device according to the exemplary embodiment of the present invention.
2C to 2E are cross-sectional views according to a first operation of the flexible display device according to an exemplary embodiment of the present invention.
3 is a perspective view of a flexible display panel according to an embodiment of the present invention.
4 is an equivalent circuit diagram of a pixel according to an embodiment of the present invention.
5 is a partial plan view of an organic light emitting display panel according to an exemplary embodiment.
6A and 6B are partial cross-sectional views of an organic light emitting display panel according to an exemplary embodiment.
7A to 7C are cross-sectional views of a thin film encapsulation layer according to an embodiment of the present invention.
8A and 8D are cross-sectional views of a display device according to an exemplary embodiment.
9A and 9B are plan views of conductive layers of a touch screen according to an embodiment of the present invention.
9C and 9D are plan views of a noise shielding conductive layer of a touch screen according to an embodiment of the present invention.
FIG. 10A is a partially enlarged view of area AA of FIG. 9A .
10B-10J are each a partial cross-sectional view of FIG. 10A according to an embodiment of the present invention.
11A is a partially enlarged view of a region BB of FIG. 9B .
11B is a partial cross-sectional view of FIG. 11A in accordance with an embodiment of the present invention.
12A is a partially enlarged view of a CC region of FIGS. 9A and 9B .
12B is a partial cross-sectional view of FIG. 12A .
13A and 13B are plan views of conductive layers of a touch screen according to an embodiment of the present invention.
13C is a partially enlarged view of a CC region of FIGS. 13A and 13B .
Fig. 13D is a partial cross-sectional view of Fig. 13C;
14A and 14B are plan views of conductive layers of a touch screen according to an embodiment of the present invention.
15A is a partially enlarged view of a DD region of FIGS. 14A and 14B .
15B is a partially enlarged view of FIG. 15A .
15C and 15D are partial cross-sectional views of FIG. 15A .

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, when a component (or region, layer, part, etc.) is referred to as “on,” “connected to,” or “coupled with” another component, it is directly disposed/on the other component. It means that it can be connected/coupled or a third component can be placed between them.

Like reference numerals refer to like elements. In addition, in the drawings, thicknesses, ratios, and dimensions of components are exaggerated for effective description of technical content. “and/or” includes any combination of one or more that the associated configurations may define.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, terms such as “below”, “lower side”, “above”, “upper side” are used to describe the relationship between the components shown in the drawings. The above terms are relative concepts, and are described with reference to directions indicated in the drawings.

Terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, and includes one or more other features, number, or step. , it should be understood that it does not preclude the possibility of the existence or addition of , operation, components, parts or combinations thereof.

1A is a perspective view illustrating a first operation of a flexible display device DD according to an exemplary embodiment. 1B is a perspective view illustrating a second operation of the flexible display device DD according to an exemplary embodiment. 2A is a cross-sectional view of the flexible display device DD according to an exemplary embodiment in a first operation. 2B is a cross-sectional view illustrating a second operation of the flexible display device DD according to an exemplary embodiment. 2C to 2E are cross-sectional views according to a first operation of the flexible display devices DD-1 to DD-3 according to an embodiment of the present invention.

The display surface IS on which the image IM is displayed is parallel to a surface defined by the first direction axis DR1 and the second direction axis DR2 . The third direction axis DR3 indicates the normal direction of the display surface IS, that is, the thickness direction of the flexible display device DD. A front surface and a rear surface of each member are divided by a third direction axis DR3 . However, the directions indicated by the first to third direction axes DR1 , DR3 , and DR3 may be converted into other directions as a relative concept. Hereinafter, the first to third directions refer to the same reference numerals as directions indicated by the first to third direction axes DR1 , DR3 , and DR3 , respectively.

1A to 2B illustrate a foldable display device as an example of the flexible display device DD. However, the present invention is not limited thereto, and the flexible display device DD may be a curved flexible display device having a predetermined curvature or a rollable flexible display device that is rolled up. Although not shown separately, the flexible display device DD of the present invention may be used in large electronic devices such as televisions and monitors, as well as small and medium-sized electronic devices such as mobile phones, tablets, car navigation systems, game machines, and smart watches.

As shown in FIG. 1A , the display surface IS of the flexible display device DD may be divided into a plurality of regions. The flexible display device DD includes a display area DD-DA in which an image IM is displayed and a non-display area DD-NDA adjacent to the display area DD-DA. The non-display area DD-NDA is an area in which an image is not displayed. 1A shows a vase as an example of the image IM. As an example, the display area DD-DA may have a rectangular shape. The non-display area DD-NDA may surround the display area DD-DA. However, the present invention is not limited thereto, and the shape of the display area DD-DA and the shape of the non-display area DD-NDA may be relatively designed.

1A and 1B , the display device DD has a bending area BA that is bent on the basis of the bending axis BX and a first non-bending area NBA1 that is not bent. , and a second non-bending area NBA2. The inner-bending may be performed so that the display surface IS of the first non-bending area NBA1 and the display surface IS of the second non-bending area NBA2 face each other. The display device DD may be outwardly bent so that the display surface IS is exposed to the outside according to a user's manipulation.

In an embodiment of the present invention, the display device DD may include a plurality of bending areas BA. In addition, the bending area BA may be defined to correspond to a shape in which the user manipulates the display device DD. For example, unlike FIG. 1B , the bending area BA may be defined in parallel to the first direction axis DR1 or may be defined in a diagonal direction. The area of the bending area BA is not fixed and may be determined according to the bending radius BR (refer to FIG. 2B ).

2A and 2B , the display device DD may include a display panel DP, a touch screen TS, and a window member WM. Each of the display panel DP, the touch screen TS, and the window member WM may have a flexible property. Although not shown separately, the display device DD may further include a protection member coupled to the window member WM to protect the display panel DP and the touch screen TS.

The display panel DP generates an image IM (refer to FIG. 1A ) corresponding to the input image data. The display panel DP may be an organic light emitting display panel, an electrophoretic display panel, an electrowetting display panel, or the like, and the type thereof is not limited. In the present invention, an organic light emitting display panel is exemplarily described. A detailed description of the organic light emitting display panel will be described later.

The touch screen TS acquires coordinate information of an external input. The touch screen TS is disposed on a base surface provided by the display panel DP. In this embodiment, the touch screen TS may be manufactured by a continuous process with the display panel.

The touch screen TS may be a capacitive touch screen. However, the present invention is not limited thereto, and may be replaced with another type of touch screen including two types of touch electrodes, such as an electromagnetic induction type.

In this embodiment, the touch screen TS reduces external light reflection. This is because the touch screen TS includes color filters as will be described later. The color filters of the touch screen TS can replace optical films such as polarizing films and ?/4 wavelength films that prevent reflection of external light.

The window member WM may be coupled to the touch screen TS by an optically clear adhesive (OCA). The window member WM includes a base member WM-BS and a bezel layer WM-BZ. The base member WM-BS may include a plastic film or the like. The bezel layer WM-BZ partially overlaps the base member WM-BS. The bezel layer WM-BZ may be disposed on the rear surface of the base member WM-BS to define a bezel area of the display device DD, that is, a non-display area NDA (refer to FIG. 1A ).

The bezel layer WM-BZ is a colored organic layer and may be formed by, for example, a coating method. Although not shown separately, the window member WM may further include a functional coating layer disposed on the front surface of the base member WM-BS. The functional coating layer may include a hard coating layer, an anti-fingerprint layer, an anti-reflection layer, and the like.

2C to 2E illustrate flexible display devices DD-1 to DD-3 according to embodiments other than the flexible display device shown in FIGS. 2A and 2B .

As shown in FIG. 2C , the window member WM may be omitted. The window member WM may be integrated with the touch screen TS. In this case, the touch screen TS includes at least a hard coating layer to increase surface strength.

2D and 2E , the touch screen TS may be coupled to the display panel DP by an optically clear adhesive (OCA).

3 is a perspective view of a flexible display panel DP according to an embodiment of the present invention. 4 is an equivalent circuit diagram of a pixel PX according to an embodiment of the present invention. Hereinafter, the flexible display panel DP will be described as an organic light emitting display panel DP. The organic light emitting display panel DP includes a display area DA and a non-display area NDA in a plan view. The display area DA and the non-display area NDA of the organic light emitting display panel DP are the display area DD-DA and the non-display area NDA of the display device DD defined by the bezel layer WM-BZ. DD-NDA), and may be changed according to the structure/design of the organic light emitting display panel DP.

As illustrated in FIG. 3 , the organic light emitting display panel DP includes a plurality of pixels PX disposed in the display area DA. Although the plurality of pixels PX arranged in a matrix is illustrated, the present invention is not limited thereto. The plurality of pixels PX may be disposed in a non-matrix shape, for example, a pentile shape.

4 exemplarily shows an equivalent circuit of one pixel PXij connected to the i-th scan line SLi and the j-th source line DLj. Although not shown separately, the plurality of pixels PX may have the same equivalent circuit.

The pixel PXij includes at least one transistor TR1 and TR2 , at least one capacitor Cap, and an organic light emitting diode OLED. Although the pixel driving circuit including two transistors TR1 and TR2 and one capacitor Cap is exemplarily illustrated in the present embodiment, the configuration of the pixel driving circuit is not limited thereto.

The anode of the organic light emitting diode OLED receives the first power voltage ELVDD applied to the power line PL through the second transistor TR2 . The cathode of the organic light emitting diode OLED receives the second power voltage ELVSS. The first transistor TR1 outputs a data signal applied to the j-th source line DLj in response to the scan signal applied to the i-th scan line SLi. The capacitor Cap is charged with a voltage corresponding to the data signal received from the first transistor TR1 . The second transistor TR2 controls the driving current flowing through the organic light emitting diode OLED in response to the voltage stored in the capacitor Cap.

5 is a partial plan view of an organic light emitting display panel DP according to an embodiment of the present invention. 6A and 6B are partial cross-sectional views of an organic light emitting display panel DP according to an exemplary embodiment. FIG. 5 illustrates a portion of the display area DA (refer to FIG. 3 ). 6A is a cross-sectional view of a portion corresponding to the first transistor TR1 and the capacitor Cap of the equivalent circuit shown in FIG. 4 , and FIG. 6B is the second transistor TR2 and the equivalent circuit shown in FIG. 4 . A cross-section of a portion corresponding to an organic light emitting diode (OLED) is shown.

As shown in FIG. 5 , the organic light emitting display panel DP includes a plurality of light emitting regions PXA-R, PXA-G, PXA-B) and the non-emission area (NPXA). FIG. 5 exemplarily illustrates three types of light emitting regions PXA-R, PXA-G, and PXA-B arranged in a matrix form. Organic light emitting devices emitting three different colors may be respectively disposed in the three types of light emitting areas PXA-R, PXA-G, and PXA-B.

In an embodiment of the present invention, organic light emitting devices emitting white colors may be respectively disposed in the three types of light emitting areas PXA-R, PXA-G, and PXA-B. In this case, three types of color filters of different colors may overlap each of the three types of emission areas PXA-R, PXA-G, and PXA-B.

The non-emission area NPXA includes the first non-emission areas NPXA-1 and the first non-emission areas NPXA-1 surrounding the light-emitting areas PXA-R, PXA-G, and PXA-B. It may be divided into a second non-emission area NPXA-2 defining a boundary. A driving circuit of the sub-pixel corresponding to each of the first non-emission areas NPXA-1, for example, transistors TR1 and TR2 (refer to FIG. 4 ) or a capacitor Cap (refer to FIG. 4 ) may be disposed. Signal lines, for example, a scan line SLi (refer to FIG. 4 ), a source line DLj (refer to FIG. 4 ), and a power line PL (refer to FIG. 4 ) may be disposed in the second non-emission area NPXA-2 . . However, the present invention is not limited thereto, and the first non-emission areas NPXA-1 and the second non-emission areas NPXA-2 may not be distinguished from each other.

Although not shown separately, according to an embodiment of the present invention, each of the emission regions PXA-R, PXA-G, and PXA-B may have a shape similar to a rhombus. According to an embodiment of the present invention, organic light emitting devices emitting four different colors may be respectively disposed in the four types of light emitting regions that are repeatedly arranged.

In the present specification, "emitting light of a predetermined color from the light emitting region" means not only emitting the light generated from the corresponding light emitting device as it is, but also converting the color of the light generated from the corresponding light emitting device and emitting it. include

6A and 6B , the organic light emitting display panel DP includes a base substrate SUB, a circuit layer DP-CL, an organic light emitting device layer DP-OLED, and a thin film encapsulation layer TFE. includes The circuit layer DP-CL may include a plurality of conductive layers and a plurality of insulating layers, and the organic light emitting diode layer DP-OLED may include a plurality of conductive layers and a plurality of functional organic layers. The thin film encapsulation layer TFE may include a plurality of organic layers and/or a plurality of inorganic layers.

The base substrate SUB is a flexible substrate and may include a plastic substrate such as polyimide, a glass substrate, a metal substrate, or the like. A semiconductor pattern AL1 (hereinafter, referred to as a first semiconductor pattern) of the first transistor TR1 and a semiconductor pattern AL2 (hereinafter, a second semiconductor pattern) of the second transistor TR2 are disposed on the base substrate SUB. The first semiconductor pattern AL1 and the second semiconductor pattern AL2 may include amorphous silicon formed at a low temperature. In addition, the first semiconductor pattern AL1 and the second semiconductor pattern AL2 may include a metal oxide semiconductor. Although not shown separately, functional layers may be further disposed on one surface of the base substrate SUB. The functional layers include at least one of a barrier layer and a buffer layer. The first semiconductor pattern AL1 and the second semiconductor pattern AL2 may be disposed on a barrier layer or a buffer layer.

A first insulating layer 12 covering the first semiconductor pattern AL1 and the second semiconductor pattern AL2 is disposed on the base substrate SUB. The first insulating layer 12 includes an organic layer and/or an inorganic layer. In particular, the first insulating layer 12 may include a plurality of inorganic thin films. The plurality of inorganic thin films may include a silicon nitride layer and a silicon oxide layer.

A control electrode GE1 (hereinafter, referred to as a first control electrode) of the first transistor TR1 and a control electrode GE2 (hereinafter, referred to as a second control electrode) of the second transistor TR2 are disposed on the first insulating layer 12 . do. The first electrode E1 of the capacitor Cap is disposed on the first insulating layer 12 . The first control electrode GE1 , the second control electrode GE2 , and the first electrode E1 may be manufactured according to the same photolithography process as the scan line SLi (refer to FIG. 4 ). In other words, the first electrode E1 may be made of the same material as the scan line.

A second insulating layer 14 is disposed on the first insulating layer 12 to cover the first control electrode GE1 , the second control electrode GE2 , and the first electrode E1 . The second insulating layer 14 includes an organic layer and/or an inorganic layer. In particular, the second insulating layer 14 may include a plurality of inorganic thin films. The plurality of inorganic thin films may include a silicon nitride layer and a silicon oxide layer.

A source line DLj (refer to FIG. 4 ) and a power line PL (refer to FIG. 4 ) may be disposed on the second insulating layer 14 . An input electrode SE1 (hereinafter, referred to as a first input electrode) and an output electrode DE1 (hereinafter, referred to as a first output electrode) of the first transistor TR1 are disposed on the second insulating layer 14 . An input electrode SE2 (hereinafter, referred to as a second input electrode) and an output electrode DE2 (hereinafter, referred to as a second output electrode) of the second transistor TR2 are disposed on the second insulating layer 14 . The first input electrode SE1 is branched from the source line DLj. The second input electrode SE2 is branched from the power line PL.

The second electrode E2 of the capacitor Cap is disposed on the second insulating layer 14 . The second electrode E2 may be manufactured according to the same photolithography process as the source line DLj and the power line PL, and may be made of the same material.

The first input electrode SE1 and the first output electrode DE1 form a first through hole CH1 and a second through hole CH2 passing through the first insulating layer 12 and the second insulating layer 14 . are respectively connected to the first semiconductor pattern AL1 through the The first output electrode DE1 may be electrically connected to the first electrode E1 . For example, the first output electrode DE1 may be connected to the first electrode E1 through a through hole (not shown) penetrating the second insulating layer 14 . The second input electrode SE2 and the second output electrode DE2 form a third through hole CH3 and a fourth through hole CH4 passing through the first insulating layer 12 and the second insulating layer 14 . through the second semiconductor pattern AL2. Meanwhile, in another embodiment of the present invention, the first transistor TR1 and the second transistor TR2 may be implemented by being modified into a bottom gate structure.

The third insulating layer 16 covering the first input electrode SE1 , the first output electrode DE1 , the second input electrode SE2 , and the second output electrode DE2 on the second insulating layer 14 . ) is placed. The third insulating layer 16 includes an organic layer and/or an inorganic layer. In particular, the third insulating layer 16 may include an organic material to provide a flat surface.

A pixel defining layer PXL and an organic light emitting diode OLED are disposed on the third insulating layer 16 . An opening OP is defined in the pixel defining layer PXL. The pixel defining layer PXL is like another insulating layer. The opening OP of FIG. 6B may correspond to the openings OP-R, OP-G, and OP-B of FIG. 5 .

The anode AE is connected to the second output electrode DE2 through the fifth through hole CH5 penetrating the third insulating layer 16 . The opening OP of the pixel defining layer PXL exposes at least a portion of the anode AE. The hole control layer HCL may be formed in common in the emission regions PXA-R, PXA-G, PXA-B (refer to FIG. 5 ) and the non-emission region NPXA (refer to FIG. 5 ). An organic emission layer EML and an electron control layer ECL are sequentially formed on the hole control layer HCL. The hole control layer HCL includes at least a hole transport layer, and the electron control layer ECL includes at least an electron transport layer. Thereafter, the cathode CE may be formed in common in the light emitting areas PXA-R, PXA-G, and PXA-B and the non-emission area NPXA. Depending on the layer structure of the cathode CE, it may be formed by deposition or sputtering.

The emission area PXA may be defined as an area in which light is generated. The emission area PXA may be defined to correspond to the anode AE or the emission layer EML of the organic light emitting diode OLED.

A thin film encapsulation layer TFE for encapsulating the organic light emitting device layer DP-OLED is disposed on the cathode CE. The thin film encapsulation layer (TFE) protects the organic light emitting diode (OLED) from moisture and foreign substances.

7A to 7C are cross-sectional views of thin film encapsulation layers TFE1 , TFE2 , and TFE3 according to an embodiment of the present invention. The thin film encapsulation layers TFE1 , TFE2 , and TFE3 according to embodiments of the present invention will be described with reference to FIGS. 7A to 7C .

The thin film encapsulation layer includes at least two inorganic thin films and an organic thin film disposed therebetween. The inorganic thin film protects the organic light emitting diode (OLED) from moisture, and the organic thin film protects the organic light emitting element (OLED) from foreign substances such as dust particles.

As shown in FIG. 7A , the thin film encapsulation layer TFE1 may include n inorganic thin films IOL1 to IOLn including the first inorganic thin film IOL1 in contact with the cathode CE (refer to FIG. 6B ). . The first inorganic thin film IOL1 may be defined as a lower inorganic thin film, and inorganic thin films other than the first inorganic thin film IOL1 among the n inorganic thin films IOL1 to IOLn may be defined as upper inorganic thin films.

The thin film encapsulation layer TFE1 may include n organic thin films OL1 to OLn, and the n organic thin films OL1 to OLn may be alternately disposed with the n inorganic thin films IOL1 to IOLn. The layer disposed on the uppermost layer may be an organic layer or an inorganic layer. The n organic thin films OL1 to OLn may have a thickness greater than that of the n inorganic thin films IOL1 to IOLn on average.

Each of the n inorganic thin films IOL1 to IOLn may be a single layer including one material or may have a multilayer each including a different material. Each of the n organic thin films OL1 to OLn may be formed by depositing organic monomers. The organic monomers may include acrylic monomers.

7B and 7C , the inorganic thin films included in each of the thin film encapsulation layers TFE2 and TFE3 may have the same or different inorganic materials, and may have the same or different thicknesses. The organic thin films included in each of the thin film encapsulation layers TFE2 and TFE3 may have the same or different organic materials, and may have the same or different thicknesses.

As shown in FIG. 7B , the thin film encapsulation layer TFE2 is a sequentially stacked first inorganic thin film IOL1 , a first organic thin film OL1 , a second inorganic thin film IOL2 , and a second organic thin film OL2 . , and a third inorganic thin film IOL3.

The first inorganic thin film IOL1 may have a two-layer structure. The first sub-layer S1 may be a lithium fluoride layer, and the second sub-layer S2 may be an aluminum oxide layer. The first organic thin film OL1 is a first organic monomer layer, the second inorganic thin film IOL2 is a first silicon nitride layer, the second organic thin film OL2 is a second organic monomer layer, and a third inorganic thin film (IOL3) may be a second silicon nitride layer.

As shown in FIG. 7C , the thin film encapsulation layer TFE3 may include a first inorganic thin film IOL10 , a first organic thin film OL1 , and a second inorganic thin film IOL20 that are sequentially stacked. The first inorganic thin film IOL10 may have a two-layer structure. The first sub-layer S10 may be a lithium fluoride layer, and the second sub-layer S20 may be a silicon oxide layer. The first organic thin film OL1 may be an organic monomer layer, and the second inorganic thin film IOL20 may have a two-layer structure. The second inorganic thin film IOL20 may include a first sub-layer S100 and a second sub-layer S200 deposited in different deposition environments. The first sub-layer S100 may be deposited under a low-power condition, and the second sub-layer S200 may be deposited under a high-power condition. Each of the first sub-layer S100 and the second sub-layer S200 may be a silicon nitride layer.

8A to 8D are cross-sectional views of display devices according to an exemplary embodiment of the present invention. The display panels DP, DP1, and DP2 are briefly illustrated. The similarities and differences of the display devices will be described with reference to FIGS. 8A to 8D .

8A and 8B , the touch screen TS includes a first conductive layer TS-CL1 , a first insulating layer TS-IL1 , a second conductive layer TS-CL2 , and a second and an insulating layer TS-IL2 , a third conductive layer TS-CL3 , and a third insulating layer TS-IL3 . The touch screen TS is directly disposed on the display panels DP and DP1. The first conductive layer TS-CL1, the second conductive layer TS-CL2, and the third conductive layer TS-CL3, respectively. Silver may have a single-layer structure or a multi-layer structure stacked along the third direction axis DR3. The multi-layered conductive layer may include a transparent conductive layer and at least one metal layer. The transparent conductive layer may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), PEDOT, metal nanowires, or graphene. The metal layer may include molybdenum, silver, titanium, copper, aluminum, and alloys thereof.

Each of the first conductive layer TS-CL1 , the second conductive layer TS-CL2 , and the third conductive layer TS-CL3 includes a plurality of patterns. Hereinafter, the first conductive layer TS-CL1 includes first conductive patterns, the second conductive layer TS-CL2 includes second conductive patterns, and the third conductive layer TS-CL3 includes third conductive patterns. It is described as including conductive patterns. The first conductive patterns are conductive layers (hereinafter, noise shielding conductive layers) that shield noise generated in the display panel DP. The noise shielding conductive layer may be a floating electrode layer or may receive a ground voltage. The second conductive patterns and the third conductive patterns may include touch electrodes and touch signal lines to sense an external input.

In the present embodiment, any one of the first insulating layer TS-IL1 and the second insulating layer TS-IL2 includes at least a color filter layer. The color filter layer includes a plurality of color filters. The color filters may be organic patterns including dyes or pigments. The color filters may include a plurality of groups of color filters. For example, the color filters may include red color filters, green color filters, and blue color filters.

In an embodiment of the present invention, any one of the first insulating layer TS-IL1 and the second insulating layer TS-IL2 may further include a black matrix. The black matrix may include an organic material as a base material. The black matrix may include a black pigment or a black dye. The material constituting the black matrix is not particularly limited.

In an embodiment of the present invention, the first insulating layer TS-IL1 and the second insulating layer TS-IL2 may further include at least one of an inorganic material layer and an organic material layer. The inorganic material layer or the organic material layer may be a planarization layer providing a flat surface. The inorganic material layer may include silicon oxide or silicon nitride. The organic material layer may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, and a perylene resin.

In an embodiment of the present invention, the third insulating layer TS-IL3 may include a black matrix. The black matrix may include an organic material having a high light absorption as a base material. The black matrix may include a black pigment or a black dye.

In an embodiment of the present invention, the third insulating layer TS-IL3 may further include at least one of an inorganic material layer and an organic material layer. In particular, it may further include an organic material layer to provide a flat surface. The inorganic material may include silicon oxide or silicon nitride. The organic material may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, urethane resin, cellulose resin, and perylene resin. In one embodiment of the present invention, the first At least one of the insulating layer TS-IL1 , the second insulating layer TS-IL2 , and the third insulating layer TS-IL3 may further include a hard coating layer. Accordingly, the touch screen TS may replace the window member. In this embodiment, the hard coating layer may include a silicone-based polymer. The material of the hard coat layer is not particularly limited, and a known hard coat material may be included.

As shown in FIG. 8A , the first conductive layer TS-CL1 may be disposed on the thin film encapsulation layer TFE. In other words, the thin film encapsulation layer TFE provides the base surface BS on which the touch screen TS is disposed.

The display panel DP1 illustrated in FIG. 8B may further include a buffer layer BFL disposed on the thin film encapsulation layer TFE compared to the display panel DP illustrated in FIG. 8A . The buffer layer BFL provides the base surface BS. The buffer layer BFL is an organic layer and may include other materials depending on its purpose. The buffer layer BFL may be an organic layer/inorganic layer for refractive index matching.

As illustrated in FIG. 8C , the touch screen TS1 may be coupled to the display panel DP by a transparent optical adhesive member OCA. The touch screen TS1 may further include a base member TS-BS on which the first conductive layer TS-CL1 and the first insulating layer TS-IL1 are disposed.

As shown in FIG. 8D , the touch screen TS2 includes a second conductive layer TS-CL2 and a third conductive layer TS-CL3 each including touch electrodes and touch signal lines. The first conductive layer TS-CL1 for shielding noise is omitted from the touch panel TS2 , and the display panel DP2 further includes a noise shielding conductive layer DP-NSPL. The noise shielding conductive layer DP-NSPL may be disposed on the thin film encapsulation layer TFE.

9A and 9B are plan views of conductive layers TS-CL1 and TS-CL2 of the touch screen TS according to an embodiment of the present invention. 9C and 9D are plan views of a noise shielding conductive layer of a touch screen according to an embodiment of the present invention. In this embodiment, a two-layer capacitive touch screen is exemplarily shown. A two-layer capacitive touch screen may acquire coordinate information of a touched point by a self-capacitance method or a mutual capacitance method. A method of driving the touch screen for obtaining coordinate information is not particularly limited.

As illustrated in FIG. 9A , the first conductive patterns may include first touch electrodes TE1-1 to TE1-3 and first touch signal lines SL1-1 to SL1-3. 9A exemplarily shows three first touch electrodes TE1-1 to TE1-3 and first touch signal lines SL1-1 to SL1-3 connected thereto.

The first touch electrodes TE1-1 to TE1-3 extend in the first direction DR1 and are arranged in the second direction DR2. Each of the first touch electrodes TE1-1 to TE1-3 has a mesh shape in which a plurality of touch openings are defined. The touch openings may correspond to the plurality of light emitting areas PXA-R, PXA-G, and PXA-B (refer to FIG. 5 ). A detailed description of the mesh shape will be described later.

Each of the first touch electrodes TE1-1 to TE1-3 includes a plurality of first sensor parts SP1 and a plurality of first connection parts CP1. The first sensor units SP1 are arranged in the first direction DR1 . Each of the first connection parts CP1 connects two adjacent first sensor parts SP1 among the first sensor parts SP1 .

The first touch signal lines SL1-1 to SL1-3 may also have a mesh shape. The first touch signal lines SL1-1 to SL1-3 may have the same layer structure as the first touch electrodes TE1-1 to TE1-3.

As illustrated in FIG. 9B , the second conductive patterns may include second touch electrodes TE2-1 to TE2-3 and second touch signal lines SL2-1 to SL2-3. 9B exemplarily shows three second touch electrodes TE2-1 to TE2-3 and second touch signal lines SL2-1 to SL2-3 connected thereto.

The second touch electrodes TE2-1 to TE2-3 insulate and cross the first touch electrodes TE1-1 to TE1-3. Each of the second touch electrodes TE2-1 to TE2-3 has a mesh shape in which a plurality of touch openings are defined.

Each of the second touch electrodes TE2-1 to TE2-3 includes a plurality of second sensor parts SP2 and a plurality of second connection parts CP2. The second sensor units SP2 are arranged in the second direction DR2 . Each of the second connection parts CP2 connects two adjacent second sensor parts SP2 among the second sensor parts SP2 .

The second touch signal lines SL2-1 to SL2-3 may also have a mesh shape. The second touch signal lines SL2-1 to SL2-3 may have the same layer structure as the second touch electrodes TE2-1 to TE2-3.

The first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 are electrostatically coupled. As touch sensing signals are applied to the first touch electrodes TE1-1 to TE1-3, capacitors are formed between the first sensor units SP1 and the second sensor units SP2.

In the present invention, the shapes of the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 including the sensor unit and the connection unit are merely exemplary and are limited thereto. doesn't happen It is sufficient if the connection part is defined as a portion where the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 intersect, and the sensor part is the first touch electrodes TE1 -1 to TE1-3) and the second touch electrodes TE2-1 to TE2-3 are defined as non-overlapping portions. For example, each of the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 may have a bar shape having a constant width.

As illustrated in FIG. 9C , the noise shielding conductive layer NSPL overlaps the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3. For example, the noise shielding conductive layer NSPL includes the first shielding parts NSP1 overlapping the first sensor parts SP1 , the second shielding parts NSP2 overlapping the second sensor parts SP2 , and the first connection part It may include third shielding parts NCP overlapping the poles CP1 and the second connection parts CP2 . The noise shielding conductive layer NSPL has a mesh shape in which a plurality of shielding openings are defined. The plurality of shielding openings may correspond to the plurality of light emitting areas PXA-R, PXA-G, PXA-B, see FIG. 5 . Each of the first shielding parts NSP1 , the second shielding parts NSP2 , and the third shielding parts NCP may be defined as a mesh line. The line width of the mesh line may be several micrometers.

As shown in FIG. 9D , the noise shielding conductive layer NSPL-1 has the shape of the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 and It can have an irrelevant shape. The noise shielding conductive layer NSPL - 1 has a rectangular shape corresponding to the display area DA, and a plurality of shielding openings may be defined.

FIG. 10A is a partially enlarged view of area AA of FIG. 9A . 10B-10J are each a partial cross-sectional view of FIG. 10A according to an embodiment of the present invention. 11A is a partially enlarged view of a region BB of FIG. 9B . 11B is a partial cross-sectional view of FIG. 11A . 12A is a partially enlarged view of a CC region of FIGS. 9A and 9B . Fig. 12B is a partial cross-sectional view of Fig. 12A; 10B to 10J, 11B, and 12B each illustrate a cross-section of the entire display device except for the window member (see FIGS. 2A and 2B ), and the circuit layer DP-CL is schematically illustrated.

As illustrated in FIG. 10A , the first sensor unit SP1 overlaps the non-emission area NPXA adjacent to the light emission areas PXA. The first sensor unit SP1 includes a plurality of first vertical parts SP1-C extending in the first direction DR1 and a plurality of first horizontal parts SP1-L extending in the second direction DR2. include The plurality of first vertical parts SP1-C and the plurality of first horizontal parts SP1-L may be defined as mesh lines. The line width of the mesh line may be several micrometers.

The plurality of first vertical parts SP1-C and the plurality of first horizontal parts SP1-L are connected to each other to form a plurality of touch openings TS-OP. In other words, the first sensor unit SP1 has a mesh shape including a plurality of touch openings TS-OP. Although it is illustrated that the touch openings TS-OP correspond to the emission areas PXA one-to-one, the present invention is not limited thereto. One touch opening TS-OP may correspond to two or more emission areas PXA. That is, two or more light emitting areas PXA may be disposed inside one touch opening TS-OP.

As shown in FIG. 10B , the thin film encapsulation layer TFE provides the base surface BS. The first shielding part NSP1 is disposed to overlap the non-emission area NPXA on the base surface BS. The first shielding part NSP1 has a mesh shape in which the shielding opening NSP-OP is defined.

A first overcoat layer TS-OC may be disposed on the base surface BS to cover the first shielding part NSP1 and provide the first flat surface FS1 . The first overcoat layer TS-OC1 may be an organic material layer as the first insulating layer TS-IL1 described with reference to FIGS. 8A to 8C .

The first sensor unit SP1 overlapping the first shielding unit NSP1 is disposed on the first overcoat layer TS-OC1. The color filters CF covering the first sensor unit SP1 are disposed on the first overcoat layer TS-OC1. The color filters CF are respectively disposed to correspond to the emission areas PXA. The color filters CF may be organic layers included in the second insulating layer TS-IL2 described with reference to FIGS. 8A to 8C .

Each of the color filters CF may include a center portion CF-C and an edge portion CF-E. The central portion CF-C overlaps a corresponding light emitting area among the plurality of light emitting areas PXA. The edge portion CF-E extends from the center portion CF-C, overlaps the non-emission area NPXA, and covers the first horizontal portion SP1 -L of the first sensor unit SP1. Although not shown separately, in each of the color filters CF, the edge portion CF-E may surround the center portion CF-C when viewed in a plan view.

Among the color filters CF shown in the present embodiment, the left color filter may be a red color filter, and the right color filter may be a green color filter. An edge portion CF-E of each of the adjacent color filters CF may contact the first horizontal portion SP1-L and cover the first horizontal portion SP1-L. Edge portions CF-E of adjacent color filters CF may contact each other. The edge portions CF-E of the adjacent color filters CF partially cover the first horizontal portion SP1 -L, and complementarily and complementarily completely cover the first conductive pattern.

The black matrix TS-BM is disposed on the color filters CF to overlap the non-emission area NPXA. The black matrix TS-BM may be an organic material layer included in the third insulating layer TS-IL3 described with reference to FIGS. 8A to 8C . As shown in FIG. 10B , the black matrix TS-BM may be directly disposed on the color filters CF. A plurality of transmission openings BM-OP corresponding to the emission areas PXA are defined in the black matrix TS-BM.

The plurality of light emitting areas PXA and the plurality of transmission openings BM-OP may have the same planar shape. In other words, the black matrix TS-BM has substantially the same shape as the non-emission area NPXA (eg, the black matrix TS-BM) has the non-emission area NPXA, the first direction DR1, and the second direction ( DR2) with the same widths). However, the present invention is not limited thereto, and the plurality of emission areas PXA and the plurality of transmission openings BM-OP may have different shapes. When viewed in a plan view, the first shielding part NSP1 and the first horizontal part SP1-L are disposed inside the black matrix TS-BM.

The color filters CF not only transmit light generated from the organic light emitting diodes OLED, but also reduce reflectance of external light. Also, as the external light passes through the color filters CF, the amount of light is reduced to about 1/3. Light passing through the color filters CF is partially extinguished and partially reflected from the organic light emitting diode layer (DP-OLED), the thin film encapsulation layer (TFE), and the like. The reflected light is incident on the color filters CF. As the reflected light passes through the color filters CF, the amount of light is reduced to about 1/3. As a result, only a portion of the external light is reflected from the display device.

10C and 10D are enlarged views of the non-emission area NPAX shown in FIG. 10B . The structure below the base surface BS was abbreviate|omitted. As illustrated in FIG. 10C , the edge portion CF-E of the left color filter may completely cover the first horizontal portion SP1-L. The edge portion CF-E of the right color filter may be disposed on the edge portion CF-E of the left color filter. The shape of the boundary portion of the color filters disposed in the non-emission area NPAX may be changed according to the order in which the left color filter and the right color filter are formed. The first horizontal portions SP1 -L may have a first line width W1 , and the first shielding portion NSP1 may have a second line width W2 greater than the first line width W1 . The first horizontal parts SP1-L are disposed inside the first shielding part NSP1.

As shown in FIG. 10D , the first black matrix TS-BM1 overlapping the first horizontal portions SP1 -L is disposed on the first flat surface FS1 . A color filter is disposed on the first flat surface FS1 . The edge portion CF-E of the right color filter and the edge portion CF-E of the left color filter partially expose the first black matrix TS-BM1. In an embodiment of the present invention, the edge portions CF-E of the color filters may be omitted. That is, the color filters may be disposed only inside the transmission openings BM-OP of the black matrix TS-BM.

A second overcoat layer TS-OC2 may be disposed on the left color filter and the right color filter. The second overcoat layer TS-OC2 may provide a second flat surface FS2 . The second overcoat layer TS-OC2 may be an organic material layer included in the second insulating layer TS-IL2 described with reference to FIGS. 8A to 8C . The second black matrix TS-BM2 may be disposed directly on the second flat surface FS2 . As shown in FIG. 10E , the first shielding part NSP1 is non-emissive on the base surface BS. It is arranged to overlap the area NPXA. The color filters CF covering the first shielding part NSP1 are disposed on the base surface BS. The first horizontal parts SP1-L are disposed on the color filters CF. An overcoat layer TS-OC is disposed on the color filters CF. A black matrix TS-BM is disposed on the flat surface FS of the overcoat layer TS-OC. In an embodiment of the present invention, another overcoat layer may be further disposed on the color filters CF.

As shown in FIG. 10F , a first black matrix TS-BM1 is disposed on the color filters CF to cover the first horizontal portions SP1-L. The first black matrix TS-BM1 may define the first transmission openings BM-OP1 . An overcoat layer TS-OC covering the first black matrix TS-BM1 is disposed on the color filters CF. A second black matrix TS-BM2 is disposed on the flat surface FS of the overcoat layer TS-OC. The second black matrix TS-BM2 may define second transmission openings BM-OP2 .

10G and 10H , the touch screen TS may further include at least one hard coating layer TS-HC, TS-HC1, TS-HC2, and TS-HC3. The touch screen TS shown in FIG. 10G has a hard coating layer TS-HC disposed on the second overcoat layer TS-OC2 and the second flat surface FS2 compared to the touch screen TS shown in FIG. 10B . further includes

By disposing the hard coating layer TS-HC, hardness may increase, and the window member WM ( FIGS. 2A and 2B ) may be omitted. Since the window member WM is integrated with the touch screen TS, the display device may be slim.

The touch screen TS illustrated in FIG. 10H further includes first to third hard coating layers TS-HC1, TS-HC2, and TS-HC3. The first hard coating layer TS-HC1 is disposed between the first overcoat layer TS-OC1 and the color filter layer including the color filters CF, and the second hard coating layer TS-HC2 includes the color filter layer and the black color filter layer. It is disposed between the matrices TS-BM, and the third hard coating layer TS-HC3 may be disposed on the uppermost layer of the touch screen TS. The touch screen TS of FIGS. 10G and 10H exemplarily shows an embodiment in which a hard coating layer is added to the touch screen TS of FIG. 10B , but the present invention is not limited thereto.

As shown in FIG. 10I , the first shielding part NSP1 , that is, the noise shielding conductive layers NSPL and NSPL-1 (refer to FIGS. 9C and 9D ) is disposed on the buffer layer BFL of the display panel DP-1. can be Although the touch screen TS of FIG. 10B is illustrated in FIG. 10I by way of example, the configuration of the touch screen TS is not limited thereto.

Although not shown separately, the touch screen shown in FIGS. 10B to 10I may further include a base member. When the base member and the display panel are combined with a transparent optical adhesive member, the display device shown in FIG. 8C may be realized.

FIG. 10J is the same as the display device shown in FIG. 8D in detail. As shown in FIG. 10J , the display panel may include noise shielding conductive layers NSPL and NSPL-1 (refer to FIGS. 9C and 9D ). 10J illustrates the first shielding part NSP1 as a part of the noise shielding conductive layer. The first shielding part NSP1 is disposed on the base surface BS. The transparent optical adhesive member OCA is disposed on the base surface BS, and the base member TS-BS is disposed on the transparent optical adhesive member OCA.

FIG. 10J exemplarily shows a touch screen TS having the same layer structure as that of the touch screen TS shown in FIG. 10B . The configuration of the touch screen TS is not limited thereto.

11A and 11B , the second sensor unit SP2 overlaps the non-emission area NPXA. The second sensor unit SP2 includes a plurality of second vertical parts SP2-C extending in the first direction DR1 and a plurality of second horizontal parts SP2-L extending in the first direction DR1 . include

The plurality of second vertical portions SP2-C and the plurality of second horizontal portions SP2-L are connected to each other to form a plurality of touch openings TS-OP. In other words, the second sensor unit SP2 has a mesh shape.

As illustrated in FIG. 11B , the color filters CF are disposed on the first flat surface FS1 . Edges CF-E of adjacent color filters CF contact each other. The second vertical portions SP2-C are disposed on the color filters CF. The black matrix TS-BM disposed on the color filters CF covers the second conductive patterns, that is, the second vertical portions SP2-C.

FIG. 11B is a partial cross-section of a region BB corresponding to FIG. 10B. In another embodiment of the present invention, the partial cross-section of the BB region may have the structure shown in FIGS. 10C to 10J . However, the first horizontal parts SP1-L are omitted and the second vertical parts SP2-C are disposed on the partial cross-section of the BB region. As shown in FIGS. 12A and 12B , the first connection part CP1 is the third horizontal parts CP1 connecting the third vertical parts CP1-C1 and CP1-C2 and the third vertical parts CP1-C1 and CP1-C2 disposed on the first over-coating layer TS-OC1 -L) may be included. Although the two third vertical parts CP1-C1 and CP1-C2 are illustrated, the present invention is not limited thereto.

The second connecting portion CP2 is a fourth connecting the fourth horizontal portions CP2-L1 and CP2-L2 and the fourth horizontal portions CP2-L1 and CP2-L2 disposed on the color filter layer TS-CF. It may include vertical parts CP2-C. The first connection part CP1 may have a mesh shape, and the second connection part CP2 may also have a mesh shape.

Although not shown in FIG. 12A , as shown in FIG. 12B , the third shielding part NCP is disposed on the base surface BS. The third shielding part NCP overlaps the first connection part CP1 and the second connection part CP2 . The first overcoat layer TS-OC1 covers the third shielding part NCP.

12A and 12B illustrate a layer structure corresponding to FIGS. 10B and 11B, but is not limited thereto. A cross-sectional structure corresponding to the connection parts CP1 and CP2 of the touch screen TS may be deformed as shown in FIGS. 10C to 10J .

As described with reference to FIGS. 10A to 12B , the first touch electrodes TE1-1 to TE1-3, the second touch electrodes TE2-1 to TE2-3, and the first shielding parts NSP1 , the second shielding parts NSP2 , and the third shielding parts NCP have a mesh shape, so that the flexibility of the flexible display device DD is improved. 1B and 2B , when the flexible display device DD is bent, applied to the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 are applied. As the tensile stress/compressive stress is reduced, their cracking can be prevented.

Since the insulating layers of the touch screen TS include the color filter CF, the display device becomes slim. The first shielding parts NSP1 , the second shielding parts NSP2 , and the third shielding parts NCP are disposed, whereby the first touch electrodes TE1-1 to TE1-1 and the second touch electrodes TE2- are disposed. Even if 1 to TE2-3) are adjacent to the circuit layer DP-CL and the organic light emitting device layer DP-OLED, noise generated therefrom may be blocked. Accordingly, touch sensitivity may be improved.

13A and 13B are plan views of conductive layers of the touch screen TS-1 according to an embodiment of the present invention. 13C is a partially enlarged view of a CC region of FIGS. 13A and 13B . Fig. 13D is a partial cross-sectional view of Fig. 13C; Hereinafter, a detailed description of the same configuration as that described with reference to FIGS. 1 to 12B will be omitted.

In this embodiment, a one-layer capacitive touch screen is illustrated as an example. It may be driven in a self-capacitance method, and a driving method of the touch screen for obtaining coordinate information is not particularly limited.

As shown in FIG. 13A , the first conductive patterns include first touch electrodes TE1-1 to TE1-3, first touch signal lines SL1-1 to SL1-3, and second touch electrodes TE1-1 to TE1-3. It may include second sensor units SP2 of TE2-1 to TE2-3, and second touch signal lines SL2-1 to SL2-3. Each of the first touch electrodes TE1-1 to TE1-3 includes a plurality of first sensor parts SP1 and a plurality of first connection parts CP1.

In other words, the plurality of first sensor units SP1 , the plurality of first connection units CP1 , and the second sensor units SP2 are disposed on the same layer. Although not shown separately, each of the regions AA and BB may have the structure of FIGS. 10B to 10J in cross-section.

As shown in FIG. 13B , the second conductive patterns include a plurality of second connection parts CP2 of the second touch electrodes TE2-1 to TE2-3. The second connection parts CP2 have a bridge function.

13C and 13D , the second connection part CP2 is formed through the first through hole TS-CH1 and the second through hole TS-CH2 passing through the color filter layer TS-CF. Among the two sensor units SP2 , two adjacent second sensor units SP2 in the second direction DR2 are electrically connected.

Although not shown in FIG. 13C , as shown in FIG. 13D , the third shielding part NCP is disposed on the base surface BS. The third shielding part NCP overlaps the first connection part CP1 and the second connection part CP2 . The first overcoat layer TS-OC1 covers the third shielding part NCP.

13C and 13D illustrate a layer structure corresponding to FIGS. 10B and 11B, but is not limited thereto. A cross-sectional structure corresponding to the connection parts CP1 and CP2 of the touch screen TS may be modified as shown in FIGS. 10C to 10J . FIGS. 14A and 14B are a touch screen according to an embodiment of the present invention. Top views of the conductive layers of (TS-2). 15A is a partially enlarged view of a DD region of FIGS. 14A and 14B . 15B is a partially enlarged view of FIG. 15A . 15C and 15D are partial cross-sectional views of FIG. 15A . Hereinafter, detailed descriptions of the same components as those described with reference to FIGS. 1 to 13D will be omitted.

14A and 14B , the first conductive patterns may include first touch electrodes TE1-1 to TE1-3 and first auxiliary electrodes SE1. Each of the first touch electrodes TE1-1 to TE1-3 includes a plurality of first sensor parts SP1 and a plurality of first connection parts CP1. The second conductive patterns may include second touch electrodes TE2-1 to TE2-3 and second auxiliary electrodes SE1. Each of the second touch electrodes TE2-1 to TE2-3 includes a plurality of second sensor parts SP2 and a plurality of second connection parts CP2.

Each of the first auxiliary electrodes SE1 overlaps a corresponding second sensor unit among the plurality of second sensor units SP2 , and each of the second auxiliary electrodes SE2 is one of the plurality of first sensor units SP1 . It may overlap the corresponding first sensor unit. The first auxiliary electrodes SE1 and the second auxiliary electrodes SE2 may have a mesh shape. Each of the first auxiliary electrodes SE1 is electrically connected to a corresponding second sensor unit, and each of the second auxiliary electrodes SE2 is electrically connected to a corresponding first sensor unit. Accordingly, the resistance of the first touch electrodes TE1-1 to TE1-3 and the second touch electrodes TE2-1 to TE2-3 is lowered, and the touch sensitivity is improved.

A combination of the first sensor units SP1 , the plurality of first connection units CP1 , and the second auxiliary electrodes SE2 may be defined as the first touch electrode. The first sensor parts SP1 correspond to the lower sensor part of the first touch electrode, the plurality of first connection parts CP1 correspond to the lower connection parts, and the second auxiliary electrodes SE2 are connected to the upper sensor part. may be applicable. Similarly, a combination of the second sensor units SP2 , the plurality of second connection units CP2 , and the first auxiliary electrodes SE1 may be defined as the second touch electrode.

15A and 15B show a connection relationship between the second auxiliary electrode SE2 and the first sensor unit SP1 in detail. The first sensor unit SP1 is illustrated by a dotted line, and the second auxiliary electrode SE2 is illustrated by a solid line. Although the line width of the second auxiliary electrode SE2 is shown to be larger than the line width of the first sensor unit SP1, the present invention is not limited thereto. The line widths of the second auxiliary electrode SE2 and the first sensor unit SP1 may be the same. The second auxiliary electrode SE2 may overlap the first sensor unit SP1 and may not overlap the first connection unit CP1 .

15C and 15D , the second auxiliary electrode SE2 and the first sensor unit SP1 may be connected through a plurality of auxiliary through-holes SCH. Although not shown in FIGS. 15A and 15B , as shown in FIGS. 15C and 15D , the third shielding part NCP is disposed on the base surface BS. The third shielding part NCP overlaps the first sensor part SP1 and the second auxiliary electrode SE2 . The first overcoat layer TS-OC1 covers the third shielding part NCP. The first sensor unit SP1 is disposed on the first overcoat layer TS-OC1.

15C and 15D illustrate a layer structure corresponding to FIGS. 10B and 11B, but is not limited thereto. A cross-sectional structure corresponding to the DD region of the touch screen TS may be deformed as shown in FIGS. 10C to 10J .

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art or those having ordinary knowledge in the technical field will not depart from the spirit and technical scope of the present invention described in the claims to be described later. It will be understood that various modifications and variations of the present invention can be made without departing from the scope of the present invention.

Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

WM: Window member WM-BS: Base member
WM-BM: Bezel layer TS: Touch screen
DP: display panel

Claims (20)

a display panel providing a base surface and including a plurality of light emitting areas and a non-emission area adjacent to the plurality of light emitting areas; and
It includes a touch screen disposed on the base surface,
The touch screen is
a noise shielding conductive layer disposed on the base surface and overlapping the non-emission area;
a first insulating layer disposed on the base surface and covering the noise shielding conductive layer;
first conductive patterns disposed on the first insulating layer and overlapping a portion of the noise shielding conductive layer;
a second insulating layer disposed on the first insulating layer;
second conductive patterns disposed on the second insulating layer and overlapping a portion of the noise shielding conductive layer; and
and a third insulating layer disposed on the second insulating layer. The method of claim 1,
and the first insulating layer includes a first overcoat layer that provides a first flat surface on which the first conductive patterns are disposed. 3. The method of claim 2,
The second insulating layer includes a plurality of color filters each overlapping a corresponding one of the plurality of emission regions. 4. The method of claim 3,
An edge of each of the plurality of color filters overlaps the non-emission area. 5. The method of claim 4,
The second insulating layer further includes a second overcoat layer that covers the plurality of color filters and provides a second flat surface on which the second conductive patterns are disposed. 5. The method of claim 4,
The second insulating layer further includes a black matrix disposed on a first flat surface, covering the first conductive patterns, and defining openings corresponding to the plurality of light emitting regions. The method of claim 1,
and the third insulating layer covers the second conductive patterns and includes a black matrix in which openings corresponding to the plurality of light emitting regions are defined. The method of claim 1,
The first insulating layer includes a plurality of color filters each overlapping a corresponding one of the plurality of emission regions. 9. The method of claim 8,
and the second insulating layer includes an overcoat layer that provides a flat surface on which the second conductive patterns are disposed. 10. The method of claim 9,
The second insulating layer further includes a black matrix disposed on the plurality of color filters, covering the first conductive patterns, and having openings corresponding to the plurality of light emitting regions defined;
The overcoat layer covers the black matrix. The method of claim 1,
At least one of the first insulating layer, the second insulating layer, and the third insulating layer includes a hard coating layer. The method of claim 1,
The noise shielding conductive layer includes first mesh lines defining first openings corresponding to the plurality of light emitting regions,
The first conductive patterns include second mesh lines defining second openings corresponding to the plurality of light emitting regions,
A line width of the first mesh lines is greater than a line width of the second mesh lines. The method of claim 1,
Further comprising a window member disposed on the touch screen and a transparent optical adhesive member for coupling the window member and the touch screen,
The window member includes a base member and a hard coating layer disposed on the base member. The method of claim 1,
The noise shielding conductive layer receives a ground voltage. The method of claim 1,
The display panel is
base substrate;
a circuit layer disposed on the base substrate;
an organic light emitting device layer disposed on the circuit layer; and
and a thin film encapsulation layer encapsulating the organic light emitting device layer. 16. The method of claim 15,
The thin film encapsulation layer provides the base surface. A display panel including a noise shielding conductive layer provided on a base surface and defined as a plurality of light emitting regions and a non-emission region adjacent to the plurality of light emitting regions, the noise shielding conductive layer disposed on the base surface to overlap the non-emission region ; and
a touch screen disposed on the noise shielding conductive layer; and
A transparent optical adhesive member for coupling the base surface and the touch screen,
The touch screen is
base member;
first conductive patterns disposed on the base member and overlapping a portion of the noise shielding conductive layer;
a first insulating layer disposed on the base member and covering the first conductive patterns;
second conductive patterns disposed on the first insulating layer and overlapping a portion of the noise shielding conductive layer; and
and a second insulating layer disposed on the first insulating layer. 18. The method of claim 17,
One of the first insulating layer and the second insulating layer includes a plurality of color filters overlapping a corresponding emission region among the plurality of emission regions. 19. The method of claim 18,
At least one of the first insulating layer and the second insulating layer includes a black matrix in which openings corresponding to the plurality of light emitting regions are defined. 20. The method of claim 19,
Each of the noise shielding conductive layer, the first conductive patterns, and the second conductive patterns has a mesh shape in which openings corresponding to the plurality of light emitting regions are defined.

Images