Display device

Abstract

A display device is provided. The display device is provided with: a sub-pixel including a first electrode, a light-emitting layer, and a second electrode; a pixel-defining layer defining the sub-pixel; a first total reflection layer overlapping the pixel-defining layer; a second total reflection layer arranged on the first total reflection layer; and a planarization layer arranged on the second total reflection layer, wherein the refractive index of the planarization layer is greater than the refractive index of the second total reflection layer, and the refractive index of the second total reflection layer is greater than the refractive index of the first total reflection layer.

Description

Technical Field

[0001] The present disclosure relates to a display device. Background Art

[0002] As the information society develops, the demand for display devices for displaying images in various forms is increasing. Therefore, various display devices such as liquid crystal displays, plasma display panels, and organic light emitting displays are being utilized.

[0003] Among display devices, organic light emitting displays, which are self-luminous display devices, have better viewing angles and contrast ratios than liquid crystal displays. Since organic light emitting displays do not require a separate backlight, they can be made light and thin, and are advantageous in terms of power consumption. In addition, organic light emitting displays can be driven with a DC low voltage and have the advantages of fast response speed and, in particular, low manufacturing cost.

[0004] The organic light emitting display includes an organic light emitting element that emits light and a pixel defining layer that defines the organic light emitting element. The organic light emitting element includes an anode, a hole transport layer, an organic light emitting layer, an electron transport layer, and a cathode. In this case, when a high potential voltage is applied to the anode and a low potential voltage is applied to the cathode, holes and electrons pass through the hole transport layer and the electron transport layer, respectively, and move to the organic light emitting layer, and recombine together in the organic light emitting layer to emit light.

[0005] A portion of the light emitted from the organic light emitting element propagates in a lateral direction of the organic light emitting display rather than in an upward direction. In this case, the portion of the light may be lost without being output in an upward direction of the organic light emitting display. Improving the output efficiency of the light emitted from the organic light emitting element may not only increase the life of the organic light emitting element, but also reduce the power consumption of the organic light emitting display. Summary of the invention

[0006] Technical issues

[0007] Aspects of the present disclosure provide a display device that can improve light output efficiency.

[0008] However, aspects of the present disclosure are not limited to the aspects set forth herein. The above and other aspects of the present disclosure will become more apparent to those of ordinary skill in the art to which the present disclosure pertains by referring to the detailed description of the present disclosure given below.

[0009] Technical Solution

[0010] According to aspects of the present disclosure, a display device is provided, comprising: a sub-pixel, the sub-pixel comprising a first electrode, a light-emitting layer, and a second electrode; a pixel defining layer, the pixel defining layer defining the sub-pixel; a first total reflection layer, the first total reflection layer overlapping the pixel defining layer; a second total reflection layer, the second total reflection layer being arranged on the first total reflection layer; and a planarization layer, the planarization layer being arranged on the second total reflection layer, wherein the refractive index of the planarization layer is greater than the refractive index of the second total reflection layer, and the refractive index of the second total reflection layer is greater than the refractive index of the first total reflection layer.

[0011] The maximum thickness of the planarization layer may be greater than the maximum thickness of the first total reflection layer, and the maximum thickness of the first total reflection layer is greater than the maximum thickness of the second total reflection layer.

[0012] The first total reflection layer may not overlap with the sub-pixel.

[0013] The display device may further include an encapsulation layer disposed on the pixel defining layer and the second electrode of the sub-pixel. The first total reflection layer may be disposed on the encapsulation layer, and the second total reflection layer may be disposed on the encapsulation layer not covered by the first total reflection layer.

[0014] The display device may further include a buffer layer disposed between the encapsulation layer and the first total reflection layer.

[0015] The first total reflection layer may surround the sub-pixel in a plan view.

[0016] The display device may further include a touch electrode overlapping the pixel defining layer.

[0017] The touch electrode may not overlap the first total reflection layer.

[0018] The second total reflection layer may cover the touch electrode.

[0019] The first total reflection layer may cover the touch electrode.

[0020] The first total reflection layer may include an opening region exposing the sub-pixel in a plan view.

[0021] The display device may further include a touch insulation layer covering the touch electrode, wherein the first total reflection layer is arranged on the touch insulation layer.

[0022] The display device may further include a third total reflection layer overlapping the pixel defining layer, wherein the first total reflection layer surrounds the sub-pixel in a plan view, and the third total reflection layer surrounds the first total reflection layer in a plan view.

[0023] The display device may further include a fourth total reflection layer disposed on the third total reflection layer, wherein a refractive index of the fourth total reflection layer is greater than a refractive index of the third total reflection layer.

[0024] The display device may further include an encapsulation layer, which is arranged on the pixel defining layer and the second electrode of the sub-pixel, wherein the first total reflection layer and the third total reflection layer are arranged on the encapsulation layer, and the second total reflection layer is arranged on the third total reflection layer and the encapsulation layer not covered by the first total reflection layer and the third total reflection layer.

[0025] The display device may further include a touch electrode overlapping the pixel defining layer.

[0026] The touch electrode may not overlap the first total reflection layer and the third total reflection layer.

[0027] The second total reflection layer may cover the touch electrode.

[0028] The third total reflection layer may cover the touch electrode.

[0029] The display device may further include a touch insulation layer covering the touch electrode, wherein the first total reflection layer and the third total reflection layer are arranged on the touch insulation layer.

[0030] The first total reflection layer may include a first inclined surface adjacent to the sub-pixel, and the second total reflection layer may include a second inclined surface arranged on the first inclined surface. The inclination angle of the first inclined surface may be defined as a first cone angle, the inclination angle of the second inclined surface may be defined as a second cone angle, and the first cone angle and the second cone angle may increase as the output angle of light totally reflected by the first total reflection layer and the output angle of light totally reflected by the second total reflection layer increase, respectively.

[0031] The first total reflection layer may include a first inclined surface adjacent to the sub-pixel, and the second total reflection layer may include a second inclined surface arranged on the first inclined surface. The inclination angle of the first inclined surface may be defined as a first cone angle, the inclination angle of the second inclined surface may be defined as a second cone angle, and each of the first cone angle and the second cone angle may decrease as an output angle of light refracted by the second total reflection layer and then totally reflected by the first total reflection layer increases.

[0032] Additional details of the disclosure are included in the detailed description and accompanying drawings.

[0033] Beneficial Effects

[0034] In the display device according to the embodiment, light of the sub-pixel that propagates in the lateral direction rather than the upward direction may be totally reflected from the third inclined surface of the second total reflection layer, totally reflected from the first inclined surface of the first total reflection layer, or refracted from the third inclined surface of the second total reflection layer and then totally reflected from the first inclined surface of the first total reflection layer to propagate in the upward direction. Therefore, the light output efficiency of the sub-pixel may be improved, thereby increasing the life of the organic light emitting element and reducing the power consumption of the organic light emitting display.

[0035] However, the effects of the present disclosure are not limited to the aforementioned effects, and various other effects are included in the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a perspective view of a display device according to an embodiment;

[0037] Figure 2 is a plan view of a display device according to an embodiment;

[0038] Figure 3 It is along Figure 2 A cross-sectional view taken along line II';

[0039] Figure 4 It is a detailed diagram Figure 3 illustrative views of examples of display units;

[0040] Figure 5 It is a detailed diagram Figure 3 illustrative views of examples of touch sensing units;

[0041] Figure 6 It is a graphic Figure 5 An example of area A, specifically illustrating Figure 4 The sub-pixel and Figure 5 A plan view of an example of a driving electrode;

[0042] Figure 7 It is along Figure 6 A cross-sectional view taken along line II-II';

[0043] Figure 8 It is along Figure 6 A cross-sectional view taken along line II-II';

[0044] Fig. 9 It is a detailed diagram Figure 7 A cross-sectional view of an example of a region B;

[0045] Fig.10 is a diagram illustrating a second cone angle of a second total reflection layer with respect to an output angle of each refractive index of a high-refractive planarization layer for outputting second light;

[0046] Fig.11 is a graph illustrating a minimum angle of a second cone angle of a second total reflection layer with respect to a refractive index of a high-refractive planarizing layer of each refractive index of the second total reflection layer for outputting second light;

[0047] Fig.12 is a diagram illustrating an example of an output angle of a first cone angle of a first total reflection layer with respect to each second cone angle of a second total reflection layer for outputting third light;

[0048] Fig.13 is a diagram illustrating another example of an output angle of a first cone angle of a first total reflection layer with respect to each second cone angle of a second total reflection layer for outputting third light;

[0049] Fig.14 It is a detailed diagram Figure 7 A cross-sectional view of another example of a region B;

[0050] Fig.15 It is a detailed diagram Figure 7 A cross-sectional view of another example of a region B;

[0051] Fig.16 It is a graphic Figure 5 Another example of region A, specifically shown in FIG. Figure 4 The sub-pixel and Figure 5 A plan view of another example of a first touch metal layer;

[0052] Fig.17 It is along Fig.16 A cross-sectional view taken along line III-III';

[0053] Fig.18 It is along Fig.16 A cross-sectional view taken along line III-III';

[0054] Fig.19 It is a graphic Figure 5 Another example of region A, specifically shown in FIG. Figure 4 The sub-pixel and Figure 5 A plan view of another example of a first touch metal layer;

[0055] Fig. 20 It is along Fig.19 A cross-sectional view taken along line IV-IV';

[0056] Fig.21 It is a graphic Figure 5 Another example of region A, specifically shown in FIG. Figure 4 The sub-pixel and Figure 5 A plan view of another example of a first touch metal layer;

[0057] Fig. 22 It is along Fig.21 A cross-sectional view taken along line V-V' of ; and

[0058] Fig.23 It is along Fig.21 A cross-sectional view taken along line V-V'. DETAILED DESCRIPTION

[0059] The advantages and features of the present invention and the methods for achieving them will be described later with reference to the accompanying drawings. Figure 1 It will become apparent from the embodiments described in detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms. The present invention is provided to fully inform the scope of the present invention to those who own the present invention, and the present invention is limited only by the scope of the claims.

[0060] When an element or layer is referred to as being "on" another element or layer, it includes all cases in which another layer or another element is directly inserted on another element or in the middle of another element. Throughout the specification, the same reference numerals refer to the same elements. The shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for describing the embodiments are exemplary, and the present invention is not limited to the illustrated contents.

[0061] Although first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below can be the second component within the technical concept of the present invention.

[0062] Each of the features of the various embodiments of the present invention can be partially or completely combined or combined with each other, various interlocks and drives are technically possible, and each embodiment can be implemented independently of each other. You can also implement them together.

[0063] Hereinafter, specific embodiments will be described with reference to the accompanying drawings.

[0064] Figure 1 is a perspective view of a display device according to an embodiment. Figure 2 is a plan view of a display device according to an embodiment.

[0065] In this specification, "above", "top" and "upper surface" refer to the upward direction from the display panel 100, that is, the Z-axis direction, and "below", "bottom" and "lower surface" refer to the downward direction from the display panel 100, that is, the direction opposite to the Z-axis direction. In addition, "left", "right", "upper" and "lower surface" refer to directions when the display panel 100 is viewed in a plane. For example, "left" refers to the direction opposite to the X-axis direction, "right" refers to the X-axis direction, "upper" refers to the Y-axis direction, and "lower" refers to the direction opposite to the Y-axis direction.

[0066] Reference Figure 1 and Figure 2 , the display device 10 is a device for displaying a moving image or a still image. The display device 10 can be used as a display screen in portable electronic devices such as mobile phones, smart phones, tablet personal computers (PCs), smart watches, watch phones, mobile communication terminals, electronic notebooks, electronic books, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs (UMPCs), as well as in various products such as televisions, notebook computers, monitors, billboards, and Internet of Things (IoT) devices. The display device 10 can be any one of an organic light-emitting display, a liquid crystal display, a plasma display panel, a field emission display, an electrophoretic display, an electrowetting display, a quantum dot light-emitting display, and a micro-light-emitting diode (LED) display. The following will mainly describe the case where the display device 10 is an organic light-emitting display, but the present disclosure is not limited thereto.

[0067] The display device 10 according to the embodiment includes a display panel 100 , a display driving circuit 200 , a circuit board 300 , and a touch driving circuit 400 .

[0068] The display panel 100 may include a main area MA and a protrusion area PA protruding from one side of the main area MA.

[0069] The main area MA may be formed as a rectangular plane having a short side in a first direction (X-axis direction) and a long side in a second direction (Y-axis direction) intersecting the first direction (X-axis direction). Each corner where the short side extending in the first direction (X-axis direction) and the long side extending in the second direction (Y-axis direction) intersect may be rounded with a predetermined curvature or may be a right angle. The planar shape of the display device 10 is not limited to a quadrilateral shape, but may also be other polygonal shapes, a circular shape, or an elliptical shape. The main area MA may be formed to be flat. However, the embodiments of the present disclosure are not limited thereto, and the main area MA may also include curved portions formed at its left and right ends. In this case, the curved portion may have a constant curvature or a varying curvature.

[0070] The main area MA may include a display area DA in which pixels are formed to display an image and a non-display area NDA disposed around the display area DA.

[0071] In the display area DA, not only pixels but also scan lines, data lines, and power lines connected to the pixels may be arranged. When the main area MA includes a curved portion, the display area DA may be arranged in the curved portion. In this case, an image of the display panel 100 may also be seen in the curved portion.

[0072] The non-display area NDA may be defined as a region extending from the outside of the display area DA to the edge of the display panel 100. Scan drivers for transmitting scan signals to scan lines and link lines connecting data lines and the display driving circuit 200 may be arranged in the non-display area NDA.

[0073] The protruding area PA may protrude from one side of the main area MA. Figure 2 As shown in FIG. 1 , the protrusion area PA may protrude from the lower side of the main area MA. The length of the protrusion area PA in the first direction (X-axis direction) may be smaller than the length of the main area MA in the first direction (X-axis direction).

[0074] The protruding area PA may include a bending area BA and a pad area PDA. In this case, the pad area PDA may be arranged on one side of the bending area BA, and the main area MA may be arranged on the other side of the bending area BA. For example, the pad area PDA may be arranged on the lower side of the bending area BA, and the main area MA may be arranged on the upper side of the bending area BA.

[0075] The display panel 100 may be formed to be flexible so that it can be bent, folded, or curled. Therefore, the display panel 100 may be bent in the bending area BA in the thickness direction (Z-axis direction). In this case, the surface of the pad area PDA of the display panel 100 faces upward before the display panel 100 is bent, and the surface of the pad area PDA of the display panel 100 faces downward after the display panel 100 is bent. Therefore, since the pad area PDA is arranged below the main area MA, it may be overlapped by the main area MA.

[0076] Pads electrically connected to the display driving circuit 200 and the circuit board 300 may be arranged on the pad area PDA of the display panel 100 .

[0077] The display driving circuit 200 outputs a signal and a voltage for driving the display panel 100. For example, the display driving circuit 200 may supply a data voltage to a data line. In addition, the display driving circuit 200 may supply a power supply voltage to a power supply line and supply a scan control signal to a scan driver. The display driving circuit 200 may be formed as an integrated circuit and may be mounted on the display panel 100 using a chip on glass (COG) method, a chip on plastic (COP) method, or an ultrasonic bonding method. However, the embodiments of the present disclosure are not limited thereto. For example, the display driving circuit 200 may be mounted on a circuit board 300.

[0078] The pads may include a display pad electrically connected to the display driving circuit 200 and a touch pad electrically connected to the touch line.

[0079] The circuit board 300 may be attached to the pad using an anisotropic conductive film. Thus, the leads of the circuit board 300 may be electrically connected to the pad. The circuit board 300 may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on film.

[0080] The touch drive circuit 400 may be connected to the touch electrodes of the touch sensor layer TSL of the display panel 100. The touch drive circuit 400 transmits a drive signal to the touch electrodes of the touch sensor layer TSL and measures the capacitance value of the touch electrodes. Each of the drive signals may be a signal having a plurality of drive pulses. The touch drive circuit 400 may not only determine whether a touch has been input, but may also calculate the touch coordinates where the touch has been input based on the capacitance value.

[0081] The touch driving circuit 400 may be disposed on the circuit board 300. The touch driving circuit 400 may be formed as an integrated circuit and mounted on the circuit board 300.

[0082] Figure 3 It is along Figure 2 A cross-sectional view taken along line II'.

[0083] Reference Figure 3 The display panel 100 may include a display unit DU having a substrate SUB, a thin film transistor layer TFTL, a light emitting element layer EML, and a thin film encapsulation layer TFEL disposed on the substrate SUB, and a touch sensing unit TDU having a touch sensor layer TSL and a total reflection layer TRL.

[0084] The substrate SUB may be made of an insulating material such as glass, quartz or a polymer resin. The polymer material may be, for example, polyethersulfone (PES), polyacrylate (PA), polyarylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyacrylate, polyimide (PI), polycarbonate (PC), cellulose triacetate (CAT), cellulose acetate propionate (CAP) or a combination thereof. Alternatively, the substrate SUB may include a metal material.

[0085] The substrate SUB may be a rigid substrate, or a flexible substrate that can be bent, folded, or rolled. When the substrate SUB is a flexible substrate, it may be made of, but not limited to, polyimide (PI).

[0086] The thin film transistor layer TFTL may be arranged on the substrate SUB. In the thin film transistor layer TFTL, not only the respective thin film transistors of the pixels but also scan lines, data lines, power lines, scan control lines, and routing lines connecting pads and data lines may be formed. Each of the thin film transistors may include a gate electrode, a semiconductor layer, a source electrode, and a drain electrode. When the scan driver 110 is as shown in FIG. Figure 4 When formed in the non-display area NDA of the display panel 100 as shown in FIG. 1 , it may include a thin film transistor.

[0087] The thin film transistor layer TFTL may be arranged in the display area DA and the non-display area NDA. Specifically, respective thin film transistors of the pixels of the thin film transistor layer TFTL, scan lines, data lines, and power lines may be arranged in the display area DA. Scan control lines and link lines of the thin film transistor layer TFTL may be arranged in the non-display area NDA.

[0088] The light emitting element layer EML may be arranged on the thin film transistor layer TFTL. The light emitting element layer EML may include pixels and a pixel defining layer defining the pixels, each pixel including a first electrode, a light emitting layer, and a second electrode. The light emitting layer may be an organic light emitting layer including an organic material. In this case, the light emitting layer may include a hole transport layer, an organic light emitting layer, and an electron transport layer. When a predetermined voltage is applied to the first electrode through the thin film transistor of the thin film transistor layer TFTL and a cathode voltage is applied to the second electrode, holes and electrons pass through the hole transport layer and the electron transport layer, respectively, and move to the organic light emitting layer, and are combined in the organic light emitting layer to emit light. The pixels of the light emitting element layer EML may be arranged in the display area DA.

[0089] The thin film encapsulation layer TFEL may be arranged on the light emitting element layer EML. The thin film encapsulation layer TFEL prevents oxygen or moisture from penetrating into the light emitting element layer EML. To this end, the thin film encapsulation layer TFEL may include at least one inorganic layer. The inorganic layer may be, but is not limited to, a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. In addition, the thin film encapsulation layer TFEL protects the light emitting element layer EML from foreign substances such as dust. To this end, the thin film encapsulation layer TFEL may include at least one organic layer. The organic layer may be, but is not limited to, an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0090] The thin film encapsulation layer TFEL may be disposed in both the display area DA and the non-display area NDA. Specifically, the thin film encapsulation layer TFEL may cover the light emitting element layer EML of the display area DA and the non-display area NDA, and may cover the thin film transistor layer TFTL of the non-display area NDA.

[0091] The touch sensor layer TSL may be disposed on the thin film encapsulation layer TFEL. Since the touch sensor layer TSL is directly disposed on the thin film encapsulation layer TFEL, the thickness of the display device 10 may be reduced compared to when a separate touch panel including the touch sensor layer TSL is attached to the thin film encapsulation layer TFEL.

[0092] The touch sensor layer TSL may include a touch electrode for sensing a user's touch in a capacitive manner and a touch line connecting a pad and the touch electrode. For example, the touch sensor layer TSL may sense a user's touch in a self-capacitive manner or a mutual-capacitive manner.

[0093] The touch electrodes of the touch sensor layer TSL may be Figure 5 The touch lines of the touch sensor layer TSL may be arranged in the touch sensor area TSA overlapping the display area DA. Figure 5 As shown in FIG. 1 , the touch peripheral area TPA is arranged in the touch peripheral area TPA overlapping the non-display area NDA.

[0094] The total reflection layer TRL may be disposed on the touch sensor layer TSL. The total reflection layer TRL is a layer that completely reflects light propagating in a lateral direction of the display panel 100 rather than in an upward direction (Z-axis direction) among the light of the light emitting element layer EML so that the light can propagate in an upward direction (Z-axis direction) of the display panel 100. Figure 3 The touch sensor layer TSL is formed as a separate layer on the touch sensor layer TSL, but the embodiments of the present disclosure are not limited thereto. For example, the touch sensor layer TSL and the total reflection layer TRL may be formed as one layer.

[0095] A cover window may be additionally disposed on the total reflection layer TRL. In this case, the total reflection layer TRL and the cover window may be bonded together by a transparent adhesive member such as an optically clear adhesive (OCA) film.

[0096] Figure 4 It is a detailed diagram Figure 3 An exemplary view of an example of a display unit.

[0097] exist Figure 4 In the figure, for convenience of description, only the pixel P, the scan line SL, the data line DL, the power line PL, the scan control line SCL, the scan driver 110, the display driving circuit 200 and the display pad DP of the display unit DU are illustrated.

[0098] Reference Figure 4 , scan lines SL, data lines DL, power lines PL, and pixels P are arranged in the display area DA. The scan lines SL may be formed parallel to each other in a first direction (X-axis direction), and the data lines DL may be formed parallel to each other in a second direction (Y-axis direction) crossing the first direction (X-axis direction). The power lines PL may include at least one line formed parallel to the data lines DL in the second direction (Y-axis direction), and a plurality of lines branched from the at least one line in the first direction (X-axis direction).

[0099] Each of the pixels P may be connected to at least any one of the scan lines SL, any one of the data lines DL, and the power line PL. Each of the pixels P may include a thin film transistor including a driving transistor and at least one switching transistor, an organic light emitting diode, and a capacitor. Each of the pixels P may receive a data voltage of the data line DL when a scan signal is transmitted from the scan line SL, and may supply a driving current to the organic light emitting diode according to the data voltage applied to the gate electrode, thereby emitting light.

[0100] The scan driver 110 is connected to the display driving circuit 200 through at least one scan control line SCL. Therefore, the scan driver 110 may receive a scan control signal of the display driving circuit 200. The scan driver 110 generates a scan signal according to the scan control signal and supplies the scan signal to the scan line SL.

[0101] Despite Figure 5 The scan driver 110 is formed in the non-display area NDA outside the left side of the display area DA, but the embodiments of the present disclosure are not limited thereto. For example, the scan driver 110 may be formed in the non-display area NDA outside the left and right sides of the display area DA.

[0102] The display driving circuit 200 is connected to the display pad DP to receive digital video data and timing signals. The display driving circuit 200 converts the digital video data into analog positive / negative data voltages and supplies the data voltages to the data lines DL through the link lines LL. In addition, the display driving circuit 200 generates a scan control signal for controlling the scan driver 110, and supplies the generated scan control signal to the scan driver 110 through the scan control line SCL. The pixel P to be supplied with the data voltage is selected by the scan signal of the scan driver 110, and the data voltage is supplied to the selected pixel P. The display driving circuit 200 can be formed as an integrated circuit and can be attached to the substrate SUB using a COG method, a COP method, or an ultrasonic bonding method.

[0103] Figure 5 It is a detailed diagram Figure 3 An exemplary view of an example of a touch sensing unit.

[0104] exist Figure 5 In the present invention, for convenience of description, only the touch electrodes TE and RE, the touch lines TL and RL, and the touch pad TP are illustrated.

[0105] Reference Figure 5 The touch sensing unit TDU includes a touch sensor area TSA for sensing a user's input and a touch peripheral area TPA arranged to surround the touch sensor area TSA. The touch sensor area TSA may overlap with the display area DA of the display unit DU, and the touch peripheral area TPA may overlap with the non-display area NDA of the display unit DU.

[0106] The touch electrodes TE and RE may be arranged in the touch sensor area TSA. The touch electrodes TE and RE may include a sensing electrode RE electrically connected in a first direction (X-axis direction), and a driving electrode TE electrically connected in a second direction (Y-axis direction) crossing the first direction (X-axis direction). In addition, although the sensing electrodes RE and the driving electrodes TE are Figure 5 The PCB is formed in a diamond shape in a plan view, but the embodiments of the present disclosure are not limited thereto.

[0107] In order to prevent the sensing electrodes RE and the driving electrodes TE from being short-circuited to each other at their intersections, the driving electrodes TE adjacent to each other in the second direction (Y-axis direction) may be electrically connected by the connecting electrode BE. In this case, the driving electrodes TE and the sensing electrodes RE may be arranged on one layer, and the connecting electrode BE may be arranged on a layer different from the driving electrodes TE and the sensing electrodes RE. In addition, the sensing electrodes RE electrically connected in the first direction (X-axis direction) and the driving electrodes TE electrically connected in the second direction (Y-axis direction) are electrically insulated from each other.

[0108] The touch lines TL and RL may be arranged in the touch peripheral area TPA. The touch lines TL and RL may include a sensing line RL connected to the sensing electrode RE and first and second driving lines TL1 and TL2 connected to the driving electrode TE.

[0109] The sensing electrode RE arranged on the right side of the touch sensor area TSA may be connected to the sensing line RL. For example, the rightmost sensing electrode among the sensing electrodes RE electrically connected in the first direction (X-axis direction) may be connected to the sensing line RL. The sensing line RL may be connected to the first touch pad TP1. Therefore, the touch drive circuit 400 may be electrically connected to the sensing electrode RE.

[0110] The driving electrode TE arranged on the lower side of the touch sensor area TSA can be connected to the first driving line TL1, and the driving electrode TE arranged on the upper side of the touch sensor area TSA can be connected to the second driving line TL2. For example, the lowermost driving electrode TE among the driving electrodes TE electrically connected in the second direction (Y-axis direction) can be connected to the first driving line TL1, and the uppermost driving electrode TE can be connected to the second driving line TL2. The second driving line TL2 can be connected to the driving electrode TE on the upper side of the touch sensor area TSA via the left outer side of the touch sensor area TSA. The first driving line TL1 and the second driving line TL2 can be connected to the second touch pad TP2. Therefore, the touch driving circuit 400 can be electrically connected to the driving electrode TE.

[0111] The touch electrodes TE and RE may be driven in a mutual capacitance manner or a self-capacitance manner. First, when the touch electrodes TE and RE are driven in a mutual capacitance manner, a drive signal is supplied to the drive electrode TE through the first drive line TL1 and the second drive line TL2 to charge the mutual capacitance formed at the intersection of the sensing electrode RE and the drive electrode TE. Subsequently, the charge change amount of the sensing electrode RE is measured through the sensing line RL, and it is determined whether a touch has been input based on the charge change amount of the sensing electrode RE. Each of the drive signals may be a signal having a plurality of drive pulses.

[0112] Second, when the touch electrodes TE and RE are driven in a self-capacitance manner, a drive signal is supplied to all the drive electrodes TE and the sensing electrodes RE through the first drive line TL1, the second drive line TL2, and the sensing line RL to charge the self-capacitance of the drive electrodes TE and the sensing electrodes RE. Subsequently, the charge change amount of the self-capacitance of the drive electrodes TE and the sensing electrodes RE is measured through the first drive line TL1, the second drive line TL2, and the sensing line RL, and it is determined whether a touch has been input based on the charge change amount of the self-capacitance.

[0113] The driving electrodes TE, the sensing electrodes RE and the connecting electrodes BE may be as follows Figure 5When the touch sensor layer TSL including the driving electrodes TE and the sensing electrodes RE is formed into a mesh shape as shown in FIG. Figure 3 When the second electrode of the light emitting element layer EML is directly formed on the thin film encapsulation layer TFEL as shown in the figure, the distance between the second electrode of the light emitting element layer EML and the driving electrode TE or the sensing electrode RE of the touch sensor layer TSL is small. Therefore, a very large parasitic capacitance may be formed between the second electrode of the light emitting element layer EML and the driving electrode TE or the sensing electrode RE of the touch sensor layer TSL. Therefore, in order to reduce the parasitic capacitance, the driving electrode TE and the sensing electrode RE may be as shown in FIG. Figure 5 In the figure, an electrode formed in a mesh shape of a transparent oxide conductive layer such as ITO or IZO is shown instead of a non-patterned electrode.

[0114] The first protection line GL1 may be arranged outside the outermost sensing line RL among the sensing lines RL. In addition, the first ground line GRL1 may be arranged outside the first protection line GL1. That is, the first protection line GL1 may be arranged on the right side of the rightmost sensing line RL among the sensing lines RL, and the first ground line GRL1 may be arranged on the right side of the first protection line GL1.

[0115] The second protection line GL2 may be arranged between the innermost sensing line RL among the sensing lines RL and the rightmost first driving line TL1 among the first driving lines TL1. In addition, the second protection line GL2 may be arranged between the rightmost first driving line TL1 among the first driving lines TL1 and the second ground line GRL2. In addition, the third protection line GL3 may be arranged between the innermost sensing line RL among the sensing lines RL and the second ground line GRL2. The second ground line GRL2 may be connected to the leftmost first touch pad among the first touch pads TP1 and the rightmost second touch pad among the second touch pads TP2.

[0116] The fourth protection line GL4 may be arranged outside the outermost second driving line TL2 among the second driving lines TL2. In addition, the third ground line GRL3 may be arranged outside the fourth protection line GL4. That is, the fourth protection line GL4 may be arranged on the left side and above the leftmost second driving line TL2 and the uppermost second driving line TL2 among the second driving lines TL2, and the third ground line GRL3 may be arranged on the left side and above the fourth protection line GL4.

[0117] The fifth protection line GL5 may be disposed inside the innermost second driving line TL2 among the second driving lines TL2. That is, the fifth protection line GL5 may be disposed between the rightmost second driving line TL2 among the second driving lines TL2 and the touch electrodes TE and RE.

[0118] according to Figure 5 In the embodiment illustrated in FIG. 1 , the first ground line GRL1, the second ground line GRL2, and the third ground line GRL3 are arranged at the uppermost side, the leftmost side, and the rightmost side of the display panel 100. In addition, a ground voltage is applied to the first ground line GRL1, the second ground line GRL2, and the third ground line GRL3. Therefore, when static electricity is applied from the outside, it can be discharged to the first ground line GRL1, the second ground line GRL2, and the third ground line GRL3.

[0119] In addition, according to Figure 5 In the embodiment illustrated in FIG, since the first protection line GL1 is arranged between the outermost sensing line RL and the first ground line GRL1, it can minimize the influence of the voltage change of the first ground line GRL1 on the outermost sensing line RL. The second protection line GL2 is arranged between the innermost sensing line RL and the outermost first driving line TL1. Therefore, the second protection line GL2 can minimize the influence of the voltage change of the innermost sensing line RL and the leftmost first driving line TL1 on each other. Since the third protection line GL3 is arranged between the innermost sensing line RL and the second ground line GRL2, it can minimize the influence of the voltage change of the second ground line GRL2 on the innermost sensing line RL. Since the fourth protection line GL4 is arranged between the outermost second driving line TL2 and the third ground line GRL3, it can minimize the influence of the voltage change of the third ground line GRL3 on the second driving line TL2. Since the fifth protection line GL5 is arranged between the innermost second driving line TL2 and the touch electrodes TE and RE, it can minimize the influence of the innermost second driving line TL2 and the touch electrodes TE and RE on each other.

[0120] When the touch electrodes TE and RE are driven in a mutual capacitance manner, a ground voltage may be applied to the first protection line GL1, the second protection line GL2, the third protection line GL3, the fourth protection line GL4, and the fifth protection line GL5. In addition, when the touch electrodes TE and RE are driven in a self-capacitance manner, a drive signal identical to a drive signal transmitted to the first drive line TL1, the second drive line TL2, and the sensing line RL may be transmitted to the first protection line GL1, the second protection line GL2, the third protection line GL3, the fourth protection line GL4, and the fifth protection line GL5.

[0121] Figure 6 It is a graphic Figure 4 The sub-pixel and Figure 5 FIG. 1 is a plan view of an example of a first touch metal layer.

[0122] Reference Figure 6, the subpixels may include a first subpixel RP, a second subpixel GP, and a third subpixel BP. Each of the first subpixels RP may display a first color, each of the second subpixels GP may display a second color, and each of the third subpixels BP may display a third color. The first color may be red, the second color may be green, and the third color may be blue, but the embodiments of the present disclosure are not limited thereto.

[0123] The display panel 100 may represent a white grayscale in units of pixels P. One first sub-pixel RP, two second sub-pixels GP, and one third sub-pixel BP may be defined as one pixel P. In addition, the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP defined as one pixel P may be as follows: Figure 6 As shown in the figure, they are arranged in a diamond shape.

[0124] In the display panel 100, the number of the first sub-pixels RP may be equal to the number of the third sub-pixels BP. In the display panel 100, the number of the second sub-pixels GP may be twice the number of the first sub-pixels RP and may be twice the number of the third sub-pixels BP. In addition, in the display panel 100, the number of the second sub-pixels GP may be equal to the sum of the number of the first sub-pixels RP and the number of the third sub-pixels BP.

[0125] exist Figure 6 In the embodiment of the present disclosure, when viewed in a plan view, the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are formed in a rhombus shape. However, the embodiments of the present disclosure are not limited thereto. That is, when viewed in a plan view, the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP may also be formed in a rectangular shape or a square shape, or may be formed in a polygonal shape other than a rectangular shape, or in a circular shape or an elliptical shape. In addition, the shape of the first sub-pixel RP, the shape of the second sub-pixel GP, and the shape of the third sub-pixel BP may be different from each other.

[0126] exist Figure 6 In the embodiment of the present disclosure, when viewed in a plan view, the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are the same as each other. However, the embodiments of the present disclosure are not limited to this. That is, when viewed in a plan view, the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP may also be different from each other. For example, when viewed in a plan view, the size of the first sub-pixel RP may be larger than the size of the second sub-pixel GP, and the size of the third sub-pixel BP may be larger than the size of the second sub-pixel GP. In addition, when viewed in a plan view, the size of the first sub-pixel RP may be substantially the same as the size of the third sub-pixel BP, or may be smaller than the size of the third sub-pixel BP.

[0127] The first total reflection layer 210 does not overlap the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP. When viewed in a plan view, the first total reflection layer 210 may surround the sub-pixels RP, GP, and BP, respectively.

[0128] The planar shape of the first total reflection layer 210 may depend on the shapes of the sub-pixels RP, GP, and BP. For example, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are the same, the shapes of the first total reflection layer 210 surrounding the first sub-pixel RP, the first total reflection layer 210 surrounding the second sub-pixel GP, and the first total reflection layer 210 surrounding the third sub-pixel BP may be the same. Alternatively, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are different from each other, the shapes of the first total reflection layer 210 surrounding the first sub-pixel RP, the first total reflection layer 210 surrounding the second sub-pixel GP, and the first total reflection layer 210 surrounding the third sub-pixel BP may be different from each other.

[0129] When viewed in a plan view, the size of the first total reflection layer 210 may depend on the sizes of the sub-pixels RP, GP, and BP. For example, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are substantially the same in a plan view, the size of the first total reflection layer 210 surrounding the first sub-pixel RP, the size of the first total reflection layer 210 surrounding the second sub-pixel GP, and the size of the first total reflection layer 210 surrounding the third sub-pixel BP may be the same. Alternatively, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are different from each other in a plan view, the size of the first total reflection layer 210 surrounding the first sub-pixel RP, the size of the first total reflection layer 210 surrounding the second sub-pixel GP, and the size of the first total reflection layer 210 surrounding the third sub-pixel BP may be different from each other.

[0130] When viewed in a plan view, the driving electrode TE may surround the first total reflection layer 210. The driving electrode TE does not overlap with the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP. In addition, the driving electrode TE does not overlap with the first total reflection layer 210. The driving electrode TE may be formed in a grid shape and arranged between the sub-pixels RP, GP, and BP. Therefore, it is possible to prevent the driving electrode TE from reducing the opening area of ​​each of the sub-pixels RP, GP, and BP. In addition, since the overlapping area between the driving electrode TE and the second electrode 173 can be reduced, the parasitic capacitance between the driving electrode TE and the second electrode 173 can be reduced. The sensing electrode RE may be formed substantially the same as the driving electrode TE, and thus a detailed description of the sensing electrode RE is omitted.

[0131] Figure 7 It is along Figure 6 A cross-sectional view taken along line II-II'.

[0132] Reference Figure 7 The thin film transistor layer TFTL is formed on the substrate SUB. The thin film transistor layer TFTL includes a thin film transistor 120, a gate insulating layer 130, an interlayer insulating layer 140, a protective layer 150 and a planarization layer 160.

[0133] The first buffer layer BF1 may be formed on the surface of the substrate SUB. The first buffer layer BF1 may be formed on the surface of the substrate SUB to protect the thin film transistor 120 and the organic light emitting layer 172 of the light emitting element layer EML from moisture introduced through the substrate SUB susceptible to moisture penetration. The first buffer layer BF1 may be composed of a plurality of inorganic layers alternately stacked. For example, the first buffer layer BF1 may be a multilayer in which one or more inorganic layers selected from silicon nitride layers, silicon oxynitride layers, silicon oxide layers, titanium oxide layers, and aluminum oxide layers are alternately stacked. The first buffer layer BF1 may be omitted.

[0134] The thin film transistors 120 are formed on the first buffer layer BF1. Each of the thin film transistors 120 includes an active layer 121, a gate electrode 122, a source electrode 123, and a drain electrode 124. Fig. 9 In the embodiment, each of the thin film transistors 120 is formed as a top gate type in which the gate electrode 122 is located above the active layer 121. However, it should be noted that the embodiments of the present disclosure are not limited thereto. That is, each of the thin film transistors 120 may also be formed as a bottom gate type in which the gate electrode 122 is located below the active layer 121, or a dual gate type in which the gate electrode 122 is located both above and below the active layer 121.

[0135] The active layer 121 is formed on the first buffer layer BF1. The active layer 121 may include polycrystalline silicon, single crystal silicon, low temperature polycrystalline silicon, amorphous silicon, or an oxide semiconductor. Examples of oxide semiconductors may include binary compounds (AB) containing indium, zinc, gallium, tin, titanium, aluminum, hafnium (Hf), zirconium (Zr), magnesium (Mg), etc. x ), ternary compounds (AB x C y ) and quaternary compounds (AB x C y D z For example, the active layer 121 may include ITZO (an oxide including indium, tin, and zinc) or IGZO (an oxide including indium, gallium, and zinc). A light blocking layer may be formed between the buffer layer and the active layer 121 to block external light from entering the active layer 121.

[0136] The gate insulating layer 130 may be formed on the active layer 121. The gate insulating layer 130 may be made of an inorganic layer such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0137] The gate electrode 122 and the gate line may be formed on the gate insulating layer 130. Each of the gate electrode 122 and the gate line may be a single layer or a multilayer made of any one or more of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), and alloys thereof.

[0138] An interlayer insulating film 140 may be formed on the gate electrode 122 and the gate line. The interlayer insulating film 140 may be made of an inorganic layer such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0139] The source electrode 123 and the drain electrode 124 may be formed on the interlayer insulating film 140. Each of the source electrode 123 and the drain electrode 124 may be connected to the active layer 121 through a contact hole penetrating the gate insulating layer 130 and the interlayer insulating film 140. Each of the source electrode 123 and the drain electrode 124 may be a single layer or a multilayer made of any one or more of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), and alloys thereof.

[0140] A protective layer 150 for insulating the thin film transistor 120 may be formed on the source electrode 123 and the drain electrode 124. The protective layer 150 may be made of an inorganic layer such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0141] The planarization layer 160 may be formed on the protection layer 150 to planarize a step caused by the thin film transistor 120. The planarization layer 160 may be made of an organic layer such as acrylic resin, epoxy resin, phenol resin, polyamide resin, or polyimide resin.

[0142] The light emitting element layer EML is formed on the thin film transistor layer TFTL and includes a light emitting element 170 and a pixel defining layer 180 .

[0143] The light emitting elements 170 and the pixel defining layer 180 are formed on the planarization layer 160. Each of the light emitting elements 170 may include a first electrode 171, an organic light emitting layer 172, and a second electrode 173.

[0144] The first electrode 171 may be formed on the planarization layer 160. The first electrode 171 is connected to the drain electrode 124 of the thin film transistor 120 through a contact hole penetrating the protection layer 150 and the planarization layer 160.

[0145] In the top emission structure in which light is emitted from the organic light emitting layer 172 toward the second electrode 173, the first electrode 171 may be made of a metal material having high reflectivity, such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide (ITO / Al / ITO), an APC alloy, or a stacked structure of an APC alloy and indium tin oxide (ITO / APC / ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

[0146] In a bottom emission structure in which light is emitted from the organic light emitting layer 172 toward the first electrode 171, the first electrode 171 may be made of a transparent conductive material (TCO) capable of transmitting light such as ITO or IZO, or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), or an alloy of Mg and Ag. In this case, when the first electrode 171 is made of a semi-transmissive conductive material, light output efficiency may be improved by the microcavity.

[0147] The pixel defining layer 180 may be formed on the planarization layer 160 to separate the first electrode 171 from another first electrode 171 so as to function as a pixel defining layer for defining sub-pixels RP, GP, and BP. The pixel defining layer 180 may cover the edge of the first electrode 171. The pixel defining layer 180 may be made of an organic layer such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0148] Each of the sub-pixels RP, GP, and BP is a region where a first electrode 171, an organic light emitting layer 172, and a second electrode 173 are sequentially stacked so that holes from the first electrode 171 and electrons from the second electrode 173 are combined in the organic light emitting layer 172 to emit light. Each of the sub-pixels RP, GP, and BP may include a light emitting element 170.

[0149] The organic light emitting layer 172 is formed on the first electrode 171 and the pixel defining layer 180. The organic light emitting layer 172 may include an organic material to emit light of a predetermined color. For example, the organic light emitting layer 172 may include a hole transport layer, an organic material layer, and an electron transport layer. In this case, the organic light emitting layer 172 of the first sub-pixel RP may emit light of a first color, the organic light emitting layer 172 of the second sub-pixel GP may emit light of a second color, and the organic light emitting layer 172 of the third sub-pixel BP may emit light of a third color. The first color may be red, the second color may be green, and the third color may be blue, but the embodiments of the present disclosure are not limited thereto.

[0150] Alternatively, the organic light emitting layer 172 of each of the sub-pixels RP, GP, and BP may emit white light. In this case, the first sub-pixel RP may overlap with the color filter layer of the first color, the second sub-pixel GP may overlap with the color filter layer of the second color, and the third sub-pixel BP may overlap with the color filter layer of the third color.

[0151] The second electrode 173 is formed on the organic light emitting layer 172. The second electrode 173 may be formed to cover the organic light emitting layer 172. The second electrode 173 may be a common layer formed in common for the sub-pixels RP, GP, and BP. A capping layer may be formed on the second electrode 173.

[0152] In the top emission structure, the second electrode 173 may be made of a transparent conductive material (TCO) capable of transmitting light such as ITO or IZO, or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), or an alloy of Mg and Ag. When the second electrode 173 is made of a semi-transmissive conductive material, light output efficiency may be improved by the microcavity.

[0153] In the bottom emission structure, the second electrode 173 may be made of a metal material having high reflectivity, such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide (ITO / Al / ITO), an APC alloy, or a stacked structure of an APC alloy and indium tin oxide (ITO / APC / ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd) and copper (Cu).

[0154] The thin film encapsulation layer TFEL is formed on the light emitting element layer EML and includes an encapsulation layer 190 .

[0155] The encapsulation layer 190 is arranged on the second electrode 173. The encapsulation layer 190 may include at least one inorganic layer to prevent oxygen or moisture from penetrating into the organic light-emitting layer 172 and the second electrode 173. In addition, the encapsulation layer 190 may include at least one organic layer to protect the light-emitting element layer EML from foreign substances such as dust. For example, the encapsulation layer 190 may include a first inorganic layer arranged on the second electrode 173, an organic layer arranged on the first inorganic layer, and a second inorganic layer arranged on the organic layer. The first inorganic layer and the second inorganic layer may be made of, but not limited to, a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The organic layer may be made of, but not limited to, acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, etc.

[0156] The second buffer layer BF2 is formed on the thin film encapsulation layer TFEL. The second buffer layer BF2 may be composed of a plurality of inorganic layers alternately stacked. For example, the second buffer layer BF2 may be a multilayer in which one or more inorganic layers selected from silicon nitride layers, silicon oxynitride layers, silicon oxide layers, titanium oxide layers, and aluminum oxide layers are alternately stacked. The second buffer layer BF2 may be omitted.

[0157] The touch sensor layer TSL is formed on the second buffer layer BF2. The touch sensor layer TSL may be formed as follows. Figure 5 The figure includes a driving electrode TE, a sensing electrode RL, a connecting electrode BE, a first driving line TL1, a second driving line TL2, a sensing line RL, protection lines GL1 to GL5, and ground lines GRL1 to GRL3. Figure 7 In the figure, for the convenience of description, only the driving electrodes TE of the touch sensor layer TSL are illustrated.

[0158] The driving electrode TE is formed on the second buffer layer BF2. In addition to the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 may be arranged on the second buffer layer BF2. That is, except for the connecting electrode BE, the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 may be arranged on the same layer and may be made of the same material. The driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 may be made of, but not limited to, a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide (ITO / Al / ITO), an APC alloy, or a stacked structure of an APC alloy and indium tin oxide (ITO / APC / ITO).

[0159] The touch insulating layer TINS ​​is formed on the driving electrode TE. The touch insulating layer TINS ​​may be made of an inorganic layer such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0160] Figure 5The connection electrodes BE illustrated in FIG. 1 may be formed on the touch insulating layer TINS. Each of the connection electrodes BE may be connected to the drive electrode TE through a contact hole penetrating the touch insulating layer TINS. The drive electrodes TE arranged in the second direction (Y-axis direction) may be electrically connected by the connection electrodes BE. The connection electrodes BE may be made of, but not limited to, a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide (ITO / Al / ITO), an APC alloy, or a stacked structure of an APC alloy and indium tin oxide (ITO / APC / ITO).

[0161] exist Figure 7 In the embodiment, the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the grounding lines GRL1 to GRL3 are formed on the second buffer layer BF2, and the connection electrode BE is formed on the touch insulating layer TINS. However, the embodiments of the present disclosure are not limited thereto. For example, the connection electrode BE may be formed on the second buffer layer BF2, and the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the grounding lines GRL1 to GRL3 may be formed on the touch insulating layer TINS.

[0162] The total reflection layer TRL is disposed on the touch sensor layer TSL. The total reflection layer TRL is a layer that totally reflects light propagating in a lateral direction rather than an upward direction (Z-axis direction) among the light from the sub-pixels RP, GP, and BP so that the light can propagate in an upward direction (Z-axis direction). The total reflection layer TRL may include a first total reflection layer 210, a second total reflection layer 220, and a high-refractive planarization layer 230.

[0163] The first total reflection layer 210 may be arranged on the touch insulation layer TINS. The first total reflection layer 210 overlaps with the pixel defining layer 180 and does not overlap with the sub-pixels RP, GP, and BP. The first total reflection layer 210 may include a first inclined surface SS1 adjacent to each of the sub-pixels RP, GP, and BP, a second inclined surface SS2 facing the first inclined surface SS1, and a first upper surface UP1 connecting the first inclined surface SS1 and the second inclined surface SS2. The first inclined surface SS1 of the first total reflection layer 210 may be an inner surface of the first total reflection layer 210, and the second inclined surface SS2 may be an outer surface of the first total reflection layer 210.

[0164] The first taper angle θ1 of the first inclined surface SS1 of the first total reflection layer 210 may be 90 degrees or less. Therefore, the first inclined surface SS1 of the first total reflection layer 210 may be a regular cone. The first taper angle θ1 is the inclination angle of the first inclined surface SS1 and represents the angle formed by the touch insulation layer TINS ​​and the first inclined surface SS1 of the first total reflection layer 210.

[0165] The first total reflection layer 210 may be made of an organic layer, or may be made of an organic layer including inorganic particles. The organic layer may be, but is not limited to, acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin. The inorganic particles may be, but are not limited to, metal particles.

[0166] The greater the thickness D1 of the first total reflection layer 210, the higher the ratio of the light of the sub-pixels RP, GP, and BP that is totally reflected from the first inclined surface SS1 of the first total reflection layer 210 to propagate in the upward direction (Z-axis direction). Therefore, in order to improve the light output efficiency of the sub-pixels RP, GP, and BP, the thickness D1 of the first total reflection layer 210 may be 1.5 μm or more, preferably, may be about 3 μm.

[0167] The second total reflection layer 220 may be disposed on the first total reflection layer 210. The second total reflection layer 220 overlaps with the pixel defining layer 180 and does not overlap with the sub-pixels RP, GP, and BP. The second total reflection layer 220 may include a third inclined surface SS3 disposed on the first inclined surface SS1, a fourth inclined surface SS4 disposed on the second inclined surface SS2, and a second upper surface UP2 disposed on the first upper surface UP1. The second upper surface UP2 may connect the third inclined surface SS3 and the fourth inclined surface SS4. The third inclined surface SS3 of the second total reflection layer 220 may be an inner surface of the second total reflection layer 220, and the fourth inclined surface SS4 may be an outer surface of the second total reflection layer 220.

[0168] The second inclination angle θ2 of the third inclined surface SS3 of the second total reflection layer 220 may be 90 degrees or less. Therefore, the third inclined surface SS3 of the second total reflection layer 220 may be a regular cone. The second cone angle θ2 is the inclination angle of the third inclined surface SS3 and represents the angle formed by the touch insulation layer TINS ​​and the third inclined surface SS3 of the second total reflection layer 220.

[0169] The second total reflection layer 220 can be made of an inorganic layer, an organic layer, or an organic layer including inorganic particles. The inorganic layer can be, but is not limited to, a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The organic layer can be, but is not limited to, an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. The inorganic particles can be, but are not limited to, metal particles.

[0170] The refractive index of the second total reflection layer 220 may be greater than that of the first total reflection layer 210 so that light of the subpixels RP, GP, and BP may be totally reflected from the first inclined surface SS1 of the first total reflection layer 210 to propagate in an upward direction (Z-axis direction).

[0171] When the thickness D2 of the second total reflection layer 220 is equal to the thickness D1 of the first total reflection layer 210 or is greater than the thickness of the first total reflection layer 210, the proportion of light refracted from the third inclined surface SS3 of the second total reflection layer 220 and then totally reflected from the first inclined surface SS1 of the first total reflection layer 210 to propagate in the upward direction (Z-axis direction) among the light of the sub-pixels RP, GP, and BP may be reduced. Therefore, the thickness D2 of the second total reflection layer 220 may be less than the thickness D1 of the first total reflection layer 210. The thickness D1 of the first total reflection layer 210 may represent the maximum thickness of the first total reflection layer 210, and the thickness D2 of the second total reflection layer 220 may represent the maximum thickness of the second total reflection layer 220.

[0172] Despite Figure 7 The second total reflection layer 220 is disposed on the first inclined surface SS1, the second inclined surface SS2 and the first upper surface UP1 of the first total reflection layer 210, but the embodiments of the present disclosure are not limited thereto. The second total reflection layer 220 may also be disposed only on the first inclined surface SS1 and the second inclined surface SS2 of the first total reflection layer 210.

[0173] The second total reflection layer 220 may be Figure 8 As shown in FIG. 1 , the touch insulating layer TINS ​​is formed to cover the touch insulating layer TINS ​​not covered by the first total reflection layer 210. In this case, since the second total reflection layer 220 can be formed without using a separate mask process, the manufacturing cost can be reduced.

[0174] The high refractive index planarization layer 230 may be Figure 7 As shown in FIG. 1 , the touch insulating layer TINS ​​and the second total reflection layer 220 may be formed on the touch insulating layer TINS ​​and the second total reflection layer 220, or may be formed on the touch insulating layer TINS ​​and the second total reflection layer 220 as shown in FIG. Figure 8 2 is formed on the second total reflection layer 220. The high-refractive planarization layer 230 is used to planarize the step formed by the first total reflection layer 210 and the second total reflection layer 220. To this end, the thickness D3 of the high-refractive planarization layer 230 may be greater than the thickness D1 of the first total reflection layer 210. For example, the thickness D3 of the high-refractive planarization layer 230 may be about 5 μm. The thickness D3 of the high-refractive planarization layer 230 may represent the maximum thickness of the high-refractive planarization layer 230.

[0175] The high-refractive planarization layer 230 may be made of an organic layer, or may be made of an organic layer including inorganic particles. The organic layer may be, but is not limited to, acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin. The inorganic particles may be, but are not limited to, metal particles.

[0176] The refractive index of the high-refractive planarization layer 230 may be greater than that of the second total reflection layer 220 so that light of the subpixels RP, GP, and BP may be totally reflected from the second inclined surface SS2 of the second total reflection layer 220 to propagate in an upward direction (Z-axis direction).

[0177] according to Figure 7 In the embodiment illustrated in FIG. 1 , light propagating in the lateral direction rather than the upward direction (Z-axis direction) among the light of the sub-pixels RP, GP, and BP may be totally reflected from the third inclined surface SS3 of the second total reflection layer 220, totally reflected from the first inclined surface SS1 of the first total reflection layer 210, or refracted from the third inclined surface SS3 of the second total reflection layer 220 and then totally reflected from the first inclined surface SS1 of the first total reflection layer 210 to propagate in the upward direction. Therefore, the light output efficiency of the sub-pixels RP, GP, and BP can be improved, thereby increasing the life of the organic light emitting element and reducing the power consumption of the organic light emitting display.

[0178] Fig. 9 It is a detailed diagram Figure 7 An example cross-sectional view of region B.

[0179] Reference Fig. 9 , the first light L1 is light that is output at the first output angle θ11 at the interface between the touch insulating layer TINS ​​and the high-refractive planarization layer 230 and then totally reflected from the first inclined surface SS1 of the first total-reflection layer 210. The light of the organic light-emitting layer 172 of the second subpixel GP may be refracted at the interface between the touch insulating layer TINS ​​and the high-refractive planarization layer 230 due to the difference in refractive index between the touch insulating layer TINS ​​and the high-refractive planarization layer 230. Therefore, the first output angle θ11 refers to an angle formed by a normal line VL drawn vertically upward at the interface between the touch insulating layer TINS ​​and the high-refractive planarization layer 230 and the first light L1.

[0180] The second light L2 is light that is output at a second output angle θ12 at the interface between the touch insulation layer TINS ​​and the high-refractive planarization layer 230 and then totally reflected from the third inclined surface SS3 of the second total-reflection layer 220. The second output angle θ12 refers to an angle formed by a normal line VL drawn vertically upward at the interface between the touch insulation layer TINS ​​and the high-refractive planarization layer 230 and the second light L2.

[0181] The first output angle θ11 may be calculated as in Equation 1, and the second output angle θ12 may be calculated as in Equation 2:

[0182]

[0183]

[0184] Fig.10 The second output angle θ12 is shown relative to the second cone angle θ2 of the second total reflection layer 220 calculated by Equation 2. Fig.10 , the x-axis represents the second cone angle θ2 of the second total reflection layer 220, and the y-axis represents the second output angle θ12.

[0185] Meanwhile, because the refractive index of the high-refractive planarization layer 230 is high, the first light L1 totally reflected from the first inclined surface SS1 of the first total-reflection layer 210 and the second light L2 totally reflected from the third inclined surface SS3 of the second total-reflection layer 220 may be refracted when they enter or exit the high-refractive planarization layer 230. Therefore, the first output angle θ11 and the second output angle θ12 may be as shown in FIG. Fig.10 The diagram shown in FIG. 11 changes according to the refractive index of the high-refractive planarization layer 230. That is, the first output angle θ11 and the second output angle θ12 may increase as the refractive index of the high-refractive planarization layer 230 increases.

[0186] like Fig.10 As shown in FIG. 1 , when the second cone angle θ2 of the second total reflection layer 220 increases, the second output angle θ12 increases. In addition, when the second cone angle θ2 of the second total reflection layer 220 and the refractive index of the second total reflection layer 220 are constant, the second output angle θ12 is as follows: Fig.10 As shown in FIG. 1 , the second output angle θ12 increases as the refractive index of the high-refractive planarizing layer 230 increases. That is, when the difference between the refractive index of the high-refractive planarizing layer 230 and the refractive index of the second total reflection layer 220 increases, the second output angle θ12 increases. For example, referring to Fig.10 , if the second cone angle θ2 of the second total reflection layer 220 is 75 degrees and the refractive index of the second total reflection layer 220 is 1.5, when the refractive index of the high-refractive planarization layer 230 is 1.8, the second output angle θ12 is about 30 degrees. On the other hand, when the refractive index of the high-refractive planarization layer 230 is 1.55, the second output angle θ12 may be about 26 degrees.

[0187] Similar to Fig.10, when the first cone angle θ1 of the first total reflection layer 210 increases, the first output angle θ11 increases. In addition, when the first cone angle θ1 of the first total reflection layer 210 and the refractive index of the first total reflection layer 210 are constant, the first output angle θ11 increases as the refractive index of the second total reflection layer 220 increases. When the difference between the refractive index of the second total reflection layer 220 and the refractive index of the first total reflection layer 210 increases, the first output angle θ11 increases.

[0188] Therefore, when the first cone angle θ1 of the first total reflection layer 210 is substantially equal to the second cone angle θ2 of the second total reflection layer 220, and the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 is substantially equal to the difference in refractive index between the second total reflection layer 220 and the high-refractive flattening layer 230, the first output angle θ11 and the second output angle θ12 can be substantially equal.

[0189] In addition, the minimum angle of the second cone angle θ2 of the second total reflection layer 220 for outputting the second light L2 may be as follows: Fig.11 , the angle θ2 of the second cone angle θ2 of the second total reflection layer 220 for outputting the second light L2 may increase as the difference in refractive index between the second total reflection layer 220 and the high-refractive planarization layer 230 decreases.

[0190] Similar to Fig.11 , the minimum angle of the first cone angle θ1 of the first total reflection layer 210 for outputting the first light L1 may increase as the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 decreases.

[0191] The third light L3 is light that is output at a third output angle θ13 at the interface between the touch insulation layer TINS ​​and the high-refractive planarization layer 230, refracted from the third inclined surface SS3 of the second total reflection layer 220, and then totally reflected from the first inclined surface SS1 of the first total reflection layer 210. The third output angle θ13 refers to an angle formed by a normal line VL drawn vertically upward at the interface between the touch insulation layer TINS ​​and the high-refractive planarization layer 230 and the third light L3.

[0192] The third output angle θ13, the first taper angle θ1 of the first total reflection layer 210, and the second taper angle θ2 of the second total reflection layer 220 may be defined as Equation 3:

[0193]

[0194] Herein, n2 represents the refractive index of the second total reflection layer 220 , and n3 represents the refractive index of the high-refractive planarization layer 230 .

[0195] Fig.12 The third output angle θ13 of the first taper angle θ1 of the first total reflection layer 210 relative to each second taper angle θ2 of the second total reflection layer 220 calculated by Equation 3 is shown. Fig.12 , the x-axis represents the third output angle θ13 , and the y-axis represents the first cone angle θ1 of the first total reflection layer 210 .

[0196] like Fig.12 and Fig.13 As shown in FIG. 2 , when the first cone angle θ1 of the first total reflection layer 210 increases, the third output angle θ13 decreases. Fig.12 and Fig.13 As shown in FIG. 2 , when the second taper angle θ2 of the second total reflection layer 220 increases, the third taper angle θ13 decreases.

[0197] In addition, if Fig.12 and Fig.13 As shown in FIG. 2 , when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 and the difference in refractive index between the second total reflection layer 220 and the high-refractive planarization layer 230 increase, the third output angle θ2 decreases. Fig.12 As shown in , when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 43 degrees. On the other hand, as Fig.13 As shown in the figure, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.6, the refractive index of the high-refractive flattening layer 230 is 1.7, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 can be approximately 40 degrees.

[0198] Fig.14 It is a detailed diagram Figure 7 A cross-sectional view of another example of region B.

[0199] Reference Fig.14 , the first cone angle θ1 of the first total reflection layer 210 may be greater than the second cone angle θ2 of the second total reflection layer 220. When the first cone angle θ1 of the first total reflection layer 210 increases, the first output angle θ11 of the first light L1 increases. Fig.10As shown in FIG. 2 , when the second cone angle θ2 of the second total reflection layer 220 increases, the second output angle θ12 of the second light L2 increases. Therefore, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 is substantially equal to the difference in refractive index between the second total reflection layer 220 and the high-refractive flattening layer 230, because the first cone angle θ1 of the first total reflection layer 210 is greater than the second cone angle θ2 of the second total reflection layer 220, the first output angle θ11 may be greater than the second output angle θ12.

[0200] In addition, when the first cone angle θ1 of the first total reflection layer 210 increases, the third output angle θ13 of the third light L3 decreases. When the second cone angle θ2 of the second total reflection layer 220 increases, the third output angle θ13 decreases. Therefore, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 is substantially equal to the difference in refractive index between the second total reflection layer 220 and the high-refractive flattening layer 230, because the second cone angle θ2 of the second total reflection layer 220 is Fig.14 In the embodiment shown in the figure, Fig. 9 In the embodiment shown in the figure, the third output angle θ13 of the third light L3 is smaller than Fig.14 In the embodiment shown in FIG. Fig. 9 In the embodiment shown in the figure.

[0201] For example, refer to Fig.12 , when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 70 degrees, the third output angle θ13 may be about 45 degrees. On the other hand, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 42 degrees.

[0202] In addition, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 and the difference in refractive index between the second total reflection layer 220 and the high-refractive planarization layer 230 increase, the third output angle θ13 of the third light L3 decreases. Fig.12, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 70 degrees, the third output angle θ13 may be about 45 degrees. On the other hand, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.6, the refractive index of the high-refractive planarization layer 230 is 1.7, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 70 degrees, the third output angle θ13 may be about 42 degrees.

[0203] Fig.15 It is a detailed diagram Figure 7 A cross-sectional view of another example of region B.

[0204] Reference Fig.15 , the first cone angle θ1 of the first total reflection layer 210 may be smaller than the second cone angle θ2 of the second total reflection layer 220. When the first cone angle θ1 of the first total reflection layer 210 increases, the first output angle θ11 of the first light L1 increases. Fig.10 As shown in FIG. 2 , when the second cone angle θ2 of the second total reflection layer 220 increases, the second output angle θ12 of the second light L2 increases. Therefore, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 is substantially equal to the difference in refractive index between the second total reflection layer 220 and the high-refractive flattening layer 230, because the first cone angle θ1 of the first total reflection layer 210 is smaller than the second cone angle θ2 of the second total reflection layer 220, the first output angle θ11 may be smaller than the second output angle θ12.

[0205] In addition, when the first cone angle θ1 of the first total reflection layer 210 increases, the third output angle θ13 of the third light L3 decreases. When the second cone angle θ2 of the second total reflection layer 220 increases, the third output angle θ13 of the third light L3 decreases. Therefore, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 is substantially equal to the difference in refractive index between the second total reflection layer 220 and the high-refractive flattening layer 230, because the first cone angle θ1 of the first total reflection layer 210 is Fig.15 In the embodiment shown in the figure, Fig. 9 In the embodiment shown in the figure, the third output angle θ13 of the third light L3 is smaller than Fig.15 In the embodiment shown in FIG. Fig. 9 In the embodiment shown in the figure.

[0206] For example, refer to Fig.12, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 70 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 49 degrees. On the other hand, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 75 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 43 degrees.

[0207] In addition, when the difference in refractive index between the first total reflection layer 210 and the second total reflection layer 220 and the difference in refractive index between the second total reflection layer 220 and the high-refractive planarization layer 230 increase, the third output angle θ13 of the third light L3 decreases. Fig.12 , when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.65, the refractive index of the high-refractive planarization layer 230 is 1.8, the first cone angle θ1 of the first total reflection layer 210 is 70 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 49 degrees. On the other hand, when the refractive index of the first total reflection layer 210 is 1.5, the refractive index of the second total reflection layer 220 is 1.6, the refractive index of the high-refractive planarization layer 230 is 1.7, the first cone angle θ1 of the first total reflection layer 210 is 70 degrees, and the second cone angle θ2 of the second total reflection layer 220 is 75 degrees, the third output angle θ13 may be about 47 degrees.

[0208] like Figures 9 to 15 As described in the embodiment of the present invention, the first output angle θ11 of the first light L1, the second output angle θ12 of the second light L2, and the third output angle θ13 of the third light L3 can be determined by the first cone angle θ1 of the first total reflection layer 210, the second cone angle θ2 of the second total reflection layer 220, the refractive index of the first total reflection layer 210, the refractive index of the second total reflection layer 220, and the refractive index of the high-refractive planarization layer 230. If the first cone angle θ1 of the first total reflection layer 210, the second cone angle θ2 of the second total reflection layer 220, the refractive index of the first total reflection layer 210, the refractive index of the second total reflection layer 220, and the refractive index of the high-refractive planarization layer 230 are appropriately set in advance through preliminary experiments, the ratio of the first light L1, the second light L2, and the third light L3 can be increased, thereby improving the light output efficiency of the sub-pixels RP, GP, and BP. Therefore, this can not only increase the life of the organic light emitting element, but also reduce the power consumption of the organic light emitting display.

[0209] Fig.16 It is a graphic Figure 4 The sub-pixel and Figure 5 FIG. 1 is a plan view of another example of a first touch metal layer.

[0210] Fig.16 The embodiments shown in the figure are Figure 6 The difference between the embodiment illustrated in FIG. 2 is that the first total reflection layer 210 overlaps with the driving electrode TE.

[0211] When viewed in plan view, refer to Fig.16 The first total reflection layer 210 does not overlap the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP. When viewed in a plan view, the first total reflection layer 210 may include an opening area OA exposing the sub-pixels RP, GP, and BP.

[0212] The planar shape of the opening area OA may depend on the shapes of the sub-pixels RP, GP, and BP. For example, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are the same, the shapes of the opening area OA exposing the first sub-pixel RP, the shapes of the opening area OA exposing the second sub-pixel GP, and the shapes of the opening area OA exposing the third sub-pixel BP may be the same. Alternatively, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are different from each other, the shapes of the opening area OA exposing the first sub-pixel RP, the shapes of the opening area OA exposing the second sub-pixel GP, and the shapes of the opening area OA exposing the third sub-pixel BP may be different from each other.

[0213] When viewed in a plan view, the size of the opening area OA may depend on the sizes of the sub-pixels RP, GP, and BP. For example, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are the same in a plan view, the size of the opening area OA exposing the first sub-pixel RP, the size of the opening area OA exposing the second sub-pixel GP, and the size of the opening area OA exposing the third sub-pixel BP may be the same. Alternatively, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are different from each other in a plan view, the size of the opening area OA exposing the first sub-pixel RP, the size of the opening area OA exposing the second sub-pixel GP, and the size of the opening area OA exposing the third sub-pixel BP may be different from each other.

[0214] The first total reflection layer 210 may overlap the driving electrode TE. Since the sensing electrode RE may be formed substantially the same as the driving electrode TE, the first total reflection layer 210 may overlap the sensing electrode RE. In addition, since the connection electrode BE overlaps the driving electrode TE and the sensing electrode RE, the first total reflection layer 210 may overlap the connection electrode BE.

[0215] Fig.17 It is along Fig.16 A cross-sectional view taken along line III-III'.

[0216] Fig.17 The embodiments shown in the figure are Figure 7 The embodiment illustrated in FIG. 1 is different in that the first total reflection layer 210 includes a first inclined surface SS1 defining an opening area OA exposing each of the sub-pixels RP, GP, and BP and is formed to cover the driving electrode TE.

[0217] Reference Fig.17 , the first total reflection layer 210 may be formed to cover the driving electrode TE and the touch insulating layer TINS, except as Fig.17 , outside the opening area OA that exposes each of the sub-pixels RP, GP, and BP.

[0218] Despite Fig.17 The second total reflection layer 220 is disposed on the first inclined surface SS1 and the first upper surface UP1 of the first total reflection layer 210, but the embodiments of the present disclosure are not limited thereto. That is, the second total reflection layer 220 may also be disposed on the first total reflection layer 210 and the touch insulation layer TINS ​​exposed when not covered by the first total reflection layer 210.

[0219] Fig.18 It is along Fig.16 A cross-sectional view taken along line III-III'.

[0220] Fig.18 The embodiments shown in the figure are Fig.17 The embodiment illustrated in FIG. 8 is different in that the touch insulating layer TINS ​​is omitted, and thus, the touch sensor layer TSL and the total reflection layer TRL are formed as one layer.

[0221] Reference Fig.18 , a first total reflection layer 210 is formed on the driving electrode TE. A connection electrode BE may be formed on the first total reflection layer 210. A second total reflection layer 220 may be formed on the connection electrode BE. Each of the connection electrodes BE may be connected to the driving electrode TE through a contact hole penetrating the first total reflection layer 210. The driving electrodes TE arranged in the second direction (Y-axis direction) may be electrically connected by the connection electrodes BE.

[0222] exist Fig.18In the embodiment, the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 are formed on the second buffer layer BF2, and the connection electrode BE is formed on the first total reflection layer 210. However, the embodiments of the present disclosure are not limited thereto. For example, the connection electrode BE may be formed on the second buffer layer BF2, and the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 may be formed on the first total reflection layer 210.

[0223] Despite Fig.18 The second total reflection layer 220 is disposed on the first inclined surface SS1 and the first upper surface UP1 of the first total reflection layer 210, but the embodiments of the present disclosure are not limited thereto. That is, the second total reflection layer 220 may also be disposed on the first total reflection layer 210 and the second buffer layer BF2 exposed when not covered by the first total reflection layer 210.

[0224] Fig.19 It is a graphic Figure 4 The sub-pixel and Figure 5 FIG. 1 is a plan view of another example of a first touch metal layer.

[0225] Fig.19 The embodiments shown in the figure are Figure 6 The embodiment illustrated in FIG. 2 is different in that the third total reflection layer 240 surrounds the first total reflection layer 210 when viewed in a plan view.

[0226] Reference Fig.19 , the third total reflection layer 240 does not overlap with the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP. When viewed in a plan view, the third total reflection layer 240 may surround the sub-pixels RP, GP, and BP, respectively. In addition, when viewed in a plan view, the third total reflection layer 240 may surround the first total reflection layer 210, respectively. In addition, when viewed in a plan view, the driving electrode TE may surround the third total reflection layer 240. The driving electrode TE does not overlap with the third total reflection layer 240.

[0227] The planar shape of the third total reflection layer 240 may depend on the shapes of the sub-pixels RP, GP, and BP. For example, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are the same, the shapes of the third total reflection layer 240 surrounding the first sub-pixel RP, the third total reflection layer 240 surrounding the second sub-pixel GP, and the third total reflection layer 240 surrounding the third sub-pixel BP may be the same. Alternatively, when the shapes of the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP are different from each other, the shapes of the third total reflection layer 240 surrounding the first sub-pixel RP, the third total reflection layer 240 surrounding the second sub-pixel GP, and the third total reflection layer 240 surrounding the third sub-pixel BP may be different from each other.

[0228] When viewed in a plan view, the size of the third total reflection layer 240 may depend on the sizes of the sub-pixels RP, GP, and BP. For example, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are the same in a plan view, the size of the third total reflection layer 240 surrounding the first sub-pixel RP, the size of the third total reflection layer 240 surrounding the second sub-pixel GP, and the size of the third total reflection layer 240 surrounding the third sub-pixel BP may be the same. Alternatively, when the size of the first sub-pixel RP, the size of the second sub-pixel GP, and the size of the third sub-pixel BP are different from each other in a plan view, the size of the third total reflection layer 240 surrounding the first sub-pixel RP, the size of the third total reflection layer 240 surrounding the second sub-pixel GP, and the size of the third total reflection layer 240 surrounding the third sub-pixel BP may be different from each other.

[0229] Fig. 20 It is along Fig.19 A cross-sectional view taken along line IV-IV'.

[0230] Fig. 20 The embodiments shown in the figure are Figure 7 The embodiment illustrated in FIG. 2 is different in that a third total reflection layer 240 is additionally arranged.

[0231] Reference Fig. 20, the third total reflection layer 240 may be arranged on the touch insulation layer TINS. The third total reflection layer 240 overlaps with the pixel defining layer 180 and does not overlap with the sub-pixels RP, GP and BP. The third total reflection layer 240 may include a fifth inclined surface SS5 adjacent to the second inclined surface SS2 of the first total reflection layer 210, a sixth inclined surface SS6 facing the fifth inclined surface SS5, and a third upper surface UP3 connecting the fifth inclined surface SS5 and the sixth inclined surface SS6. The fifth inclined surface SS5 of the third total reflection layer 240 may be an inner surface of the third total reflection layer 240, and the sixth inclined surface SS6 may be an outer surface of the third total reflection layer 240.

[0232] The third taper angle θ3 of the fifth inclined surface SS5 of the third total reflection layer 240 may be 90 degrees or less. Therefore, the fifth inclined surface SS5 of the third total reflection layer 240 may be a regular cone. The third taper angle θ3 is the inclination angle of the fifth inclined surface SS5 and represents the angle formed by the touch insulation layer TINS ​​and the fifth inclined surface SS5 of the third total reflection layer 240.

[0233] The third total reflection layer 240 may be made of an organic layer, or may be made of an organic layer including inorganic particles. The organic layer may be, but is not limited to, acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin. The inorganic particles may be, but are not limited to, metal particles.

[0234] The larger the thickness D4 of the third total reflection layer 240, the higher the proportion of light that is totally reflected from the fifth inclined surface SS5 of the third total reflection layer 240 to propagate in the upward direction among the light of the sub-pixels RP, GP, and BP. Therefore, in order to improve the light output efficiency of the sub-pixels RP, GP, and BP, the thickness D4 of the third total reflection layer 240 may be 1.5 μm or more, preferably, may be about 3 μm. The thickness D4 of the third total reflection layer 240 may be substantially equal to the thickness D1 of the first total reflection layer 210. In addition, the width W3 of the third total reflection layer 240 may be substantially equal to the width W1 of the first total reflection layer 210. However, the embodiments of the present disclosure are not limited thereto.

[0235] The fourth total reflection layer 250 may be disposed on the third total reflection layer 240. The fourth total reflection layer 250 overlaps with the pixel defining layer 180 and does not overlap with the sub-pixels RP, GP, and BP. The fourth total reflection layer 250 may include a seventh inclined surface SS7 disposed on the fifth inclined surface SS5, an eighth inclined surface SS8 disposed on the sixth inclined surface SS6, and a fourth upper surface UP4 disposed on the third upper surface UP3. The fourth upper surface UP4 may connect the seventh inclined surface SS7 and the eighth inclined surface SS8. The seventh inclined surface SS7 of the fourth total reflection layer 250 may be an inner surface of the fourth total reflection layer 250, and the eighth inclined surface SS8 may be an outer surface of the fourth total reflection layer 250.

[0236] The fourth taper angle θ4 of the seventh inclined surface SS7 of the fourth total reflection layer 250 may be 90 degrees or less. Therefore, the seventh inclined surface SS7 of the fourth total reflection layer 250 may be a regular cone. The fourth taper angle θ4 is the inclination angle of the seventh inclined surface SS7 and represents the angle formed by the touch insulation layer TINS ​​and the seventh inclined surface SS7 of the fourth total reflection layer 250.

[0237] The fourth total reflection layer 250 can be made of an inorganic layer, an organic layer, or an organic layer including inorganic particles. The inorganic layer can be, but is not limited to, a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The organic layer can be, but is not limited to, an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. The inorganic particles can be, but are not limited to, metal particles.

[0238] The refractive index of the fourth total reflection layer 250 may be greater than that of the third total reflection layer 240 so that light of the subpixels RP, GP, and BP may be totally reflected from the fifth inclined surface SS5 of the third total reflection layer 240 to propagate in an upward direction.

[0239] When the thickness D5 of the fourth total reflection layer 250 is equal to the thickness D4 of the third total reflection layer 240 or is greater than the thickness D4 of the third total reflection layer 240, the proportion of light refracted from the seventh inclined surface SS7 of the fourth total reflection layer 250 and then totally reflected from the fifth inclined surface SS5 of the third total reflection layer 240 to propagate in the upward direction (Z-axis direction) among the light of the sub-pixels RP, GP, and BP can be reduced. Therefore, the thickness D5 of the fourth total reflection layer 250 can be less than the thickness D4 of the third total reflection layer 240. The thickness D5 of the fourth total reflection layer 250 can be substantially equal to the thickness D2 of the second total reflection layer 220.

[0240] Despite Fig. 20The fourth total reflection layer 250 is arranged on the fifth inclined surface SS5, the sixth inclined surface SS6 and the third upper surface UP3 of the third total reflection layer 240, but the embodiments of the present disclosure are not limited thereto. The fourth total reflection layer 250 may also be arranged only on the fifth inclined surface SS5 and the sixth inclined surface SS6 of the third total reflection layer 240.

[0241] The fourth total reflection layer 250 may be Figure 8 As shown in FIG. 1 , the touch insulating layer TINS ​​is formed to cover the touch insulating layer TINS ​​not covered by the first total reflection layer 210 and the third total reflection layer 240. In this case, since the second total reflection layer 220 and the fourth total reflection layer 250 can be formed as one layer without using separate mask processes, the manufacturing cost can be reduced.

[0242] The high refractive index planarization layer 230 may be Fig. 20 , is formed on the touch insulation layer TINS, the second total reflection layer 220, and the fourth total reflection layer 250. Alternatively, when the second total reflection layer 220 and the fourth total reflection layer 250 are formed as one layer without using a separate mask process, the high-refractive planarization layer 230 may be formed on the second total reflection layer 220 and the fourth total reflection layer 250. The high-refractive planarization layer 230 is used to planarize the steps formed by the first total reflection layer 210, the second total reflection layer 220, the third total reflection layer 230, and the fourth total reflection layer 250. To this end, the thickness D3 of the high-refractive planarization layer 230 may be greater than the thickness D4 of the third total reflection layer 240.

[0243] The refractive index of the high-refractive planarization layer 230 may be greater than the refractive index of the second total reflection layer 220 and the fourth total reflection layer 250 so that light of sub-pixels RP, GP and BP may be totally reflected from the second inclined surface SS2 of the second total reflection layer 220 to propagate in an upward direction (Z-axis direction).

[0244] according to Fig. 20 The embodiment shown in FIG. Figure 7 Compared to the embodiment illustrated in FIG. 1 , light propagating in a lateral direction rather than an upward direction among the light of the sub-pixels RP, GP, and BP may be additionally totally reflected from the seventh inclined surface SS7 of the fourth total reflection layer 250, may be totally reflected from the fifth inclined surface SS5 of the third total reflection layer 240, or may be refracted from the seventh inclined surface SS7 of the fourth total reflection layer 250 and then totally reflected from the fifth inclined surface SS5 of the third total reflection layer 240 to propagate in an upward direction. Therefore, the light output efficiency of the sub-pixels RP, GP, and BP may be further improved, thereby further increasing the lifespan of the organic light emitting element and further reducing the power consumption of the organic light emitting display.

[0245] In addition, among the lights of the sub-pixels RP, GP, and BP, light totally reflected by the fifth inclined surface SS5 of the third total reflection layer 240, light totally reflected by the seventh inclined surface SS7 of the fourth total reflection layer 250, and light refracted by the seventh inclined surface SS7 of the fourth total reflection layer 250 and then totally reflected by the fifth inclined surface SS5 of the third total reflection layer 240 are reflected by the light beams refracted by the seventh inclined surface SS7 of the fourth total reflection layer 250. Figures 9 to 15 The first light L1 , the second light L2 , and the third light L3 are totally reflected according to substantially the same principle, and thus, a detailed description thereof is omitted.

[0246] Despite Fig. 20 In the embodiment, the second total reflection layer 220 is arranged only on the first total reflection layer 210 and the fourth total reflection layer 250 is arranged only on the third total reflection layer 240, but the embodiments of the present disclosure are not limited thereto. That is, the second total reflection layer 220 and the fourth total reflection layer 250 may also be formed as one layer and arranged on the first total reflection layer 210, the third total reflection layer 240, and the touch insulation layer TINS ​​exposed when not covered by the first total reflection layer 210 and the third total reflection layer 240. In this case, the second total reflection layer 220 and the fourth total reflection layer 250 formed as one layer may cover the driving electrode TE.

[0247] Fig.21 It is a graphic Figure 4 The sub-pixel and Figure 5 FIG. 1 is a plan view of another example of a first touch metal layer.

[0248] Fig.21 The embodiments shown in the figure are Figure 6 The difference between the embodiment illustrated in FIG. 2 is that the third total reflection layer 240 overlaps with the driving electrode TE.

[0249] Reference Fig.21 When viewed in a plan view, the third total reflection layer 240 does not overlap the first sub-pixel RP, the second sub-pixel GP, and the third sub-pixel BP. When viewed in a plan view, the third total reflection layer 240 may include an opening area OA2 exposing the sub-pixels RP, GP, and BP and the first total reflection layer 210.

[0250] The planar shape of the opening area OA2 may depend on the size of the sub-pixels RP, GP, and BP. In addition, when viewed in a plan view, the size of the opening area OA2 may depend on the size of the sub-pixels RP, GP, and BP.

[0251] The third total reflection layer 240 may overlap the driving electrode TE. Since the sensing electrode RE may be formed substantially the same as the driving electrode TE, the third total reflection layer 240 may overlap the sensing electrode RE. In addition, since the connection electrode BE is formed as in Figure 5The first total reflection layer 210 overlaps with the driving electrode TE and the sensing electrode RE, so the first total reflection layer 210 may overlap with the connecting electrode BE.

[0252] Fig. 22 It is along Fig.21 A cross-sectional view taken along line V-V'.

[0253] Fig. 22 The embodiments shown in the figure are Fig. 20 The embodiment illustrated in FIG. 4 is different in that the third total reflection layer 240 includes a fifth inclined surface SS5 defining an opening area OA2 of each of the sub-pixels RP, GP, and BP and is formed to cover the driving electrode TE.

[0254] Reference Fig. 22 , the third total reflection layer 240 may be formed to cover the driving electrode TE and the touch insulation layer TINS, except as Fig. 22 , outside the opening area OA2 that exposes each of the sub-pixels RP, GP, and BP as illustrated in FIG.

[0255] Despite Fig. 22 In the embodiment, the second total reflection layer 220 is arranged only on the first total reflection layer 210 and the fourth total reflection layer 250 is arranged only on the third total reflection layer 240, but the embodiments of the present disclosure are not limited thereto. That is, the second total reflection layer 220 and the fourth total reflection layer 250 may also be formed as one layer and arranged on the first total reflection layer 210, the third total reflection layer 240, and the touch insulation layer TINS ​​exposed when not covered by the first total reflection layer 210 and the third total reflection layer 240. Fig.23 It is along Fig.21 A cross-sectional view taken along line V-V'.

[0256] Fig.23 The embodiments shown in the figure are Fig. 22 The embodiment illustrated in FIG. 8 is different in that the touch insulating layer TINS ​​is omitted, and thus, the touch sensor layer TSL and the total reflection layer TRL are formed as one layer.

[0257] Reference Fig.23 , a third total reflection layer 240 is formed on the driving electrode TE. A connection electrode BE may be formed on the third total reflection layer 240. A fourth total reflection layer 250 may be formed on the connection electrode BE. Each of the connection electrodes BE may be connected to the driving electrode TE through a contact hole penetrating the third total reflection layer 240. The driving electrodes TE arranged in the second direction (Y-axis direction) may be connected by the connection electrode BE.

[0258] exist Fig.23In the embodiment, the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 are formed on the second buffer layer BF2, and the connection electrode BE is formed on the third total reflection layer 240. However, the embodiments of the present disclosure are not limited thereto. For example, the connection electrode BE may be formed on the second buffer layer BF2, and the driving electrode TE, the sensing electrode RE, the first driving line TL1, the second driving line TL2, the sensing line RL, the protection lines GL1 to GL5, and the ground lines GRL1 to GRL3 may be formed on the third total reflection layer 240.

[0259] Despite Fig.23 In the embodiment, the second total reflection layer 220 is disposed only on the first total reflection layer 210 and the fourth total reflection layer 250 is disposed only on the third total reflection layer 240, but the embodiments of the present disclosure are not limited thereto. That is, the second total reflection layer 220 and the fourth total reflection layer 250 may also be formed as one layer and disposed on the first total reflection layer 220, the third total reflection layer 240, and the second buffer layer BF2 exposed without being covered by the first total reflection layer 220 and the third total reflection layer 240.

[0260] Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A display device, comprising: A sub-pixel, wherein the sub-pixel includes a first electrode, a light-emitting layer, and a second electrode; A pixel defining layer, wherein the pixel defining layer defines the sub-pixel; a first total reflection layer, the first total reflection layer overlaps the pixel defining layer and is arranged on the second electrode; a second total reflection layer, wherein the second total reflection layer is arranged on the first total reflection layer; as well as a planarization layer, the planarization layer being arranged on the second total reflection layer, The refractive index of the planarization layer is greater than the refractive index of the second total reflection layer, and the refractive index of the second total reflection layer is greater than the refractive index of the first total reflection layer, and Wherein, the first total reflection layer does not overlap with the sub-pixel, and The maximum thickness of the planarization layer is greater than the maximum thickness of the first total reflection layer, and the maximum thickness of the first total reflection layer is greater than the maximum thickness of the second total reflection layer.

2. The display device according to claim 1, further comprising an encapsulation layer, the encapsulation layer being arranged on the pixel defining layer and the second electrode of the sub-pixel, wherein: The first total reflection layer is disposed on the encapsulation layer, and the second total reflection layer is disposed on the encapsulation layer not covered by the first total reflection layer. 3 . The display device according to claim 2 , further comprising a buffer layer disposed between the encapsulation layer and the first total reflection layer.

4. The display device according to claim 1, wherein: The first total reflection layer surrounds the sub-pixel in a plan view. 5 . The display device according to claim 1 , further comprising a touch electrode overlapping the pixel defining layer.

6. The display device according to claim 5, wherein: The touch electrode does not overlap with the first total reflection layer.

7. The display device according to claim 6, wherein: The second total reflection layer covers the touch electrode.

8. The display device according to claim 5, wherein: The first total reflection layer covers the touch electrode.

9. The display device according to claim 8, wherein: The first total reflection layer includes an opening area exposing the sub-pixel in a plan view.

10. The display device according to claim 5, further comprising a touch insulating layer, the touch insulating layer covering the touch electrode, wherein: The first total reflection layer is arranged on the touch insulation layer.

11. The display device according to claim 1, wherein: The first total reflection layer includes a first inclined surface adjacent to the sub-pixel, and the second total reflection layer includes a second inclined surface arranged on the first inclined surface, wherein an inclination angle of the first inclined surface is defined as a first cone angle, an inclination angle of the second inclined surface is defined as a second cone angle, and the first cone angle and the second cone angle increase as an output angle of light totally reflected by the first total reflection layer and an output angle of light totally reflected by the second total reflection layer increase, respectively.

12. The display device according to claim 1, wherein: The first total reflection layer includes a first inclined surface adjacent to the sub-pixel, and the second total reflection layer includes a second inclined surface arranged on the first inclined surface, wherein an inclination angle of the first inclined surface is defined as a first cone angle, an inclination angle of the second inclined surface is defined as a second cone angle, and each of the first cone angle and the second cone angle decreases as an output angle of light refracted by the second total reflection layer and then totally reflected by the first total reflection layer increases.

13. A display device, comprising: A sub-pixel, wherein the sub-pixel includes a first electrode, a light-emitting layer, and a second electrode; A pixel defining layer, wherein the pixel defining layer defines the sub-pixel; a first total reflection layer, the first total reflection layer overlaps the pixel defining layer and is arranged on the second electrode; a second total reflection layer, wherein the second total reflection layer is arranged on the first total reflection layer; as well as a planarization layer, the planarization layer being arranged on the second total reflection layer; a third total reflection layer, the third total reflection layer overlaps with the pixel defining layer, The refractive index of the planarization layer is greater than the refractive index of the second total reflection layer, and the refractive index of the second total reflection layer is greater than the refractive index of the first total reflection layer, and The first total reflection layer surrounds the sub-pixel in a plan view, and the third total reflection layer surrounds the first total reflection layer in a plan view.

14. The display device according to claim 13, further comprising a fourth total reflection layer, the fourth total reflection layer being arranged on the third total reflection layer, wherein: The refractive index of the fourth total reflection layer is greater than the refractive index of the third total reflection layer.

15. The display device according to claim 13, further comprising an encapsulation layer, the encapsulation layer being arranged on the pixel defining layer and the second electrode of the sub-pixel, wherein: The first total reflection layer and the third total reflection layer are disposed on the encapsulation layer, and the second total reflection layer is disposed on the third total reflection layer and the encapsulation layer not covered by the first total reflection layer and the third total reflection layer. 16 . The display device according to claim 13 , further comprising a touch electrode overlapping the pixel defining layer.

17. The display device according to claim 16, wherein: The touch electrode does not overlap with the first total reflection layer and the third total reflection layer.

18. The display device according to claim 17, wherein: The second total reflection layer covers the touch electrode.

19. The display device according to claim 16, wherein: The third total reflection layer covers the touch electrode.

20. The display device according to claim 16, further comprising a touch insulating layer, the touch insulating layer covering the touch electrode, wherein: The first total reflection layer and the third total reflection layer are arranged on the touch insulation layer.

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