Display device

Abstract

The present application relates to a display device. The display device includes a substrate, a first display pixel disposed on the substrate and including a light emitting element, a first sensor pixel disposed on the substrate and including an optical sensor, a first bank disposed on the substrate, wherein the first display pixel is disposed in the first bank, a first light blocking layer overlapping the first bank, a first color filter disposed on the first light blocking layer and overlapping the light emitting element, and an optical pattern layer disposed on the optical sensor, wherein the optical pattern layer includes a light blocking portion and a plurality of light transmitting portions passing through the light blocking portion.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2019-0159161, filed on December 3, 2019, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present invention relates to a display device, and more specifically, to a display device including an optical sensor. Background Technology

[0004] With the further development of the information society, the demand for display devices for displaying images is increasing in various forms. For example, display devices are used in various electronic devices, such as smartphones, digital cameras, laptops, navigation devices, and smart TVs. Display devices can be flat panel displays such as liquid crystal displays, field emission displays, or organic light-emitting diode displays.

[0005] Organic light-emitting display devices typically use organic light-emitting elements (e.g., organic light-emitting diodes (OLEDs)) to display images. OLEDs generate light through the recombination of electrons and holes, which produces excitons that emit light when they approach the ground state. Organic light-emitting display devices can have relatively fast response times, relatively high brightness, and relatively wide viewing angles, and they are driven with low power consumption.

[0006] Recently, there has been research and development on display devices that include sensors for fingerprint recognition in the display panel of the display device. Summary of the Invention

[0007] According to an exemplary embodiment of the present invention, a display device includes: a substrate; a first display pixel disposed on the substrate and including a light-emitting element; a first sensor pixel disposed on the substrate and including an optical sensor; a first barrier disposed on the substrate, wherein the first display pixel is disposed in the first barrier; a first light-shielding layer overlapping the first barrier; a first color filter disposed on the first light-shielding layer and overlapping the light-emitting element; and an optical pattern layer disposed on the optical sensor, wherein the optical pattern layer includes a light-shielding portion and a plurality of light-transmitting portions passing through the light-shielding portion.

[0008] In an exemplary embodiment of the present invention, the light-emitting element includes a first pixel electrode and a light-emitting layer disposed on the first pixel electrode, the optical sensor includes a second pixel electrode and a light-receiving layer disposed on the second pixel electrode, and the first pixel electrode and the second pixel electrode are formed by the same conductive layer.

[0009] In an exemplary embodiment of the present invention, the display device further includes a common electrode disposed on the light receiving layer and the light emitting layer.

[0010] In an exemplary embodiment of the present invention, the display device further includes: a first source electrode and a first drain electrode, wherein the first source electrode or the first drain electrode is electrically connected to a first pixel electrode; and a second source electrode and a second drain electrode, wherein the second source electrode or the second drain electrode is electrically connected to a second pixel electrode, wherein the first source electrode, the first drain electrode, the second source electrode and the second drain electrode are formed of the same conductive layer.

[0011] In an exemplary embodiment of the present invention, the light-shielding portion and the first light-shielding layer are formed of the same material.

[0012] In an exemplary embodiment of the present invention, the display device further includes: a second barrier disposed on a substrate, wherein the first sensor pixel is disposed in the second barrier, and wherein the first barrier and the second barrier are formed of the same material.

[0013] In an exemplary embodiment of the present invention, the display device further includes a second light-shielding layer overlapping the second dam, wherein the first light-shielding layer and the second light-shielding layer are formed of the same material.

[0014] In an exemplary embodiment of the present invention, the display device further includes: a thin-film encapsulation layer disposed on the light-emitting element and the optical sensor; a cover window disposed on the thin-film encapsulation layer; and a touch sensing layer disposed between the thin-film encapsulation layer and the cover window.

[0015] In an exemplary embodiment of the present invention, the substrate includes: a folded region; a first non-folded region located on one side of the folded region; and a second non-folded region located on the other side of the folded region.

[0016] In an exemplary embodiment of the present invention, the optical sensor includes a phototransistor or a photodiode.

[0017] In an exemplary embodiment of the present invention, the display device further includes a second color filter disposed on the optical pattern layer and overlapping with the optical sensor.

[0018] In an exemplary embodiment of the present invention, the second color filter fills a plurality of light-transmitting portions and is disposed on the inner wall of the light-shielding portion.

[0019] In an exemplary embodiment of the present invention, the display device further includes a planarization layer covering the first color filter and the second color filter.

[0020] In an exemplary embodiment of the present invention, the display device further includes: a plurality of first transmissive patterns disposed on the light-emitting element.

[0021] In an exemplary embodiment of the present invention, a first color filter is disposed on the upper surface and side surface of the first transmission pattern.

[0022] In an exemplary embodiment of the present invention, the display device further includes: a second transmissive pattern disposed in a plurality of light-transmitting portions of the optical pattern layer, wherein the second transmissive pattern and the first transmissive pattern are formed of the same material.

[0023] In an exemplary embodiment of the present invention, a second color filter is disposed on the upper surface of the second transmission pattern and the light-blocking portion.

[0024] In an exemplary embodiment of the present invention, the display device further includes a second color filter disposed between the optical sensor and the optical pattern layer.

[0025] In an exemplary embodiment of the present invention, the display device further includes: a planarization layer disposed on the optical pattern layer, wherein the planarization layer fills a plurality of light-transmitting portions and is disposed on the inner wall of the light-shielding portions.

[0026] In an exemplary embodiment of the present invention, the planarization layer contacts the second color filter through a plurality of light-transmitting portions. Attached Figure Description

[0027] The above and other features of the present invention will become more apparent from the detailed description of exemplary embodiments of the invention with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention;

[0029] Figure 2 This is a perspective view of a display device in a folded state according to an embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional view of a display device according to an embodiment of the present invention;

[0031] Figure 4 This is a diagram illustrating the configuration of display pixels and sensor pixels of a display device according to an embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of the display pixels and sensor pixels of a display device according to an embodiment of the present invention;

[0033] Figure 6 It is shown Figure 5 A cross-sectional view of the light reflection path in a display device;

[0034] Figure 7 This is a perspective view showing the path of reflected light in a display device according to an embodiment of the present invention;

[0035] Figure 8 This is a diagram illustrating sensor pixels and an optical sensor according to an embodiment of the present invention;

[0036] Figure 9 This is a plan view illustrating an example of the optical pattern layer of a display device according to an embodiment of the present invention;

[0037] Figure 10 This is a plan view illustrating an example of the optical pattern layer of a display device according to an embodiment of the present invention;

[0038] Figure 11 This is a cross-sectional view of a display device according to an embodiment of the present invention; and

[0039] Figure 12 This is a cross-sectional view of a display device according to an embodiment of the present invention. Detailed Implementation

[0040] Exemplary embodiments of the invention will be described more fully below with reference to the accompanying drawings. However, the invention is not limited to the following exemplary embodiments, and the invention can be implemented in various different forms.

[0041] It will be understood that when an element or layer is referred to as being "on" another element or layer, the element or layer may be directly on the other element or layer, or there may be an intermediate element or layer. Throughout this specification, the same reference numerals may denote the same components. The shapes, sizes, proportions, angles, quantities, etc., disclosed in the drawings are merely examples, and therefore, the invention is not limited thereto.

[0042] Although terms such as "first," "second," etc., can be used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, without departing from the spirit and scope of the invention, the first component mentioned below may be referred to as the second component.

[0043] Each of the features of the various exemplary embodiments of the present invention can be paired or combined with each other, either partially or entirely, and various interlocking and driving mechanisms are technically possible. Each exemplary embodiment of the present invention can be implemented independently of each other or the exemplary embodiments of the present invention can be implemented together.

[0044] In the following description, exemplary embodiments of the invention will be described in more detail with reference to the accompanying drawings.

[0045] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention. Figure 2 This is a perspective view of a display device in a folded state according to an embodiment of the present invention.

[0046] In this specification, "upper," "top," and "upper surface" represent the upward direction, for example, relative to the Z-axis direction of display device 1, and "lower," "bottom," and "lower surface" represent the downward direction, for example, relative to the direction opposite to the Z-axis direction of display device 1 (e.g., the negative Z-axis direction). Additionally, "left," "right," "up," and "down" represent the directions when display device 1 is viewed in a plan view. For example, "left" represents the direction opposite to the X-axis direction (e.g., the negative X-axis direction), "right" represents the X-axis direction, "up" represents the Y-axis direction, and "down" represents the direction opposite to the Y-axis direction (e.g., the negative Y-axis direction).

[0047] Reference Figure 1 and Figure 2 Display device 1 is a device used to display video or still images. Display device 1 can be used as a display screen for various products, such as not only mobile phones, smartphones, tablet PCs, smartwatches, watch phones, mobile terminals, e-notebooks, e-books, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs (UMPCs), but also televisions, laptops, monitors, billboards, and Internet of Things (IoT) products.

[0048] Display device 1 can be a foldable display device. For example, a foldable display device can be foldable, flexible, or rollable. For example, a foldable display device can include a flexible state.

[0049] Display device 1 may have a planar rectangular shape. Display device 1 may have a planar rectangular shape in which the corners form right angles or are rounded. Display device 1 may include four side edges LS1, LS2, SS1, and SS2. Display device 1 may include long side edges LS1 and LS2 and short side edges SS1 and SS2. For example, each of the long side edges LS1 and LS2 may extend in a first direction (X-axis direction), and each of the short side edges SS1 and SS2 may extend in a second direction (Y-axis direction).

[0050] Display device 1 may include a folding axis AXIS_F extending in a second direction (Y-axis direction). Display device 1 can be folded at the folding axis AXIS_F. The folding axis AXIS_F may extend across each of the long side edges LS1 and LS2. In this case, each of the long side edges LS1 and LS2 of display device 1 can be folded, but the invention is not limited thereto. For example, the folding axis AXIS_F may extend across each of the short side edges SS1 and SS2, and in this case, each of the short side edges SS1 and SS2 of display device 1 can be folded along the folding axis AXIS_F.

[0051] Display device 1 may include a foldable region FA (or, for example, a foldable region), a first non-foldable region NFA1, and a second non-foldable region NFA2 (or, for example, a non-foldable region). The first non-foldable region NFA1 and the second non-foldable region NFA2 may be portions that are not flexible or have a slight degree of bending under external pressure. For example, the first non-foldable region NFA1 and the second non-foldable region NFA2 may have relatively high rigidity.

[0052] The folding region FA can be located between the first non-folding region NFA1 and the second non-folding region NFA2. The folding region FA can be flexible, capable of bending to a large extent under external pressure, and can be folded or unfolded. The first non-folding region NFA1, the second non-folding region NFA2, and the folding region FA can be connected to each other or integrated into one unit, and can be separated from each other by a rigid layer (e.g., a metal plate disposed on the rear surface of the display device 1 to support the upper structure). The display device 1 can be folded inward so that the display area DA faces inward, or folded outward so that the display area DA faces outward.

[0053] Display device 1 includes a display panel 10 for displaying images. The display panel 10 may include a display area DA and a non-display area NDA.

[0054] The display area DA is an area used to display an image and may include multiple display pixels DPX. Additionally, the display area DA can be used as a detection component for detecting the external environment. For example, the display area DA may include a fingerprint recognition area for identifying a user's fingerprint. For example, the display area DA may correspond to a fingerprint recognition area for identifying a user's fingerprint. Therefore, the display area DA may include multiple display pixels DPX and multiple sensor pixels SPX.

[0055] The non-display area NDA can be the remaining area in the display panel 10 other than the display area DA. For example, the non-display area NDA can be adjacent to the display area DA. For example, the non-display area NDA may include a scan driver for applying scan signals to scan lines, fan-out lines connecting data lines and display drivers to each other, and pads connected to the circuit board.

[0056] The non-display area NDA can be formed as opaque. The non-display area NDA can also be formed with a decorative layer containing a pattern that can be displayed to the user. In the folded state of the display device 1, the regions of the display area DA, divided based on the folding axis AXIS_F, can be stacked on top of each other. In the unfolded state of the display device 1, a screen can be displayed in the display area DA in each of the unfolded states of the regions. For example, when in the unfolded state, the first non-folded area NFA1 and the second non-folded area NFA2 form a generally flat surface to provide a screen in the display area DA.

[0057] Figure 3 This is a cross-sectional view of a display device according to an embodiment of the present invention.

[0058] Reference Figure 3 The display device 1 may include a display panel 10 and a cover window CW.

[0059] Display panel 10 may be a light-emitting display panel that includes light-emitting elements. For example, display panel 10 may be an organic light-emitting display panel using organic light-emitting diodes (OLEDs) including organic light-emitting layers, a micro-LED display panel using micro light-emitting diodes (LEDs), a quantum dot light-emitting display panel using quantum dot light-emitting diodes (LEDs) including quantum dot emission layers, or an inorganic light-emitting display panel using inorganic light-emitting elements that include inorganic semiconductors. In the following description, examples in which display panel 10 is an organic light-emitting display panel will be given.

[0060] The display panel 10 may include a substrate SUB, a thin film transistor layer (TFTL), a light-emitting element layer (EML), a thin film encapsulation layer (TFEL), a touch sensing layer (TSL), and an anti-reflective layer (RFL).

[0061] The substrate SUB can be formed from a flexible material, allowing it to be bent or folded. For example, flexible materials may include at least one of polystyrene (PS), polyvinyl alcohol (PVA), polymethyl methacrylate (PMMA), polyethersulfone (PES), polyacrylate (PA), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate (PAR), polyimide (PI), polycarbonate (PC), triacetyl cellulose (TAC), and cellulose acetate propionate (CAP). However, the material of the substrate SUB can be varied and may be formed from materials such as fiberglass reinforced plastic (FRP).

[0062] A thin-film transistor layer (TFTL) can be disposed on a substrate (SUB). The TFTL may include at least one thin-film transistor for driving each of a plurality of display pixels and sensor pixels. Each of the thin-film transistors may include a gate electrode, a semiconductor layer, a source electrode, and a drain electrode. The TFTL may also include scan lines, data lines, power lines, scan control lines, and routing lines connecting the pads and data lines to the thin-film transistors.

[0063] The thin-film transistor layer (TFTL) can be disposed in both the display area (DA) and the non-display area (NDA). For example, the thin-film transistors, scan lines, data lines, and power lines of the TFTL can be disposed in the display area (DA). Conversely, the scan control lines and wiring of the TFTL can be disposed in the non-display area (NDA).

[0064] A light-emitting element layer (EML) is disposed on a thin-film transistor layer (TFTL). The EML may include a light-emitting element having a first pixel electrode, a light-emitting layer, and a common electrode. The EML may also include an optical sensor having a second pixel electrode, a light-receiving layer, and a common electrode. The light-emitting element and the optical sensor can be disposed on the same layer. Therefore, since the thickness of the display panel 10 can be minimized, the folding characteristics of the display device 1 can be improved. (See later...) Figure 5 Provide a detailed description.

[0065] A thin-film encapsulation layer (TFEL) can be disposed on the light-emitting element layer (EML). The TFEL prevents oxygen or moisture from penetrating into the EML. Therefore, the TFEL may include at least one inorganic film. The inorganic film may be silicon nitride (SiN). x ) layer, silicon oxynitride (SiON) layer, silicon oxide (SiO) layer x ) layer, titanium oxide (TiO) x ) layer or aluminum oxide (AlO) x (This may be a layer, but the invention is not limited thereto.)

[0066] In addition, the thin-film encapsulation layer TFEL can protect the light-emitting element layer EML from foreign substances such as dust. For this purpose, the thin-film encapsulation layer TFEL may further include at least one organic film. The organic film may be acrylic resin, epoxy resin, phenolic resin, polyamide (PA) resin, or polyimide (PI) resin, but the invention is not limited thereto.

[0067] The thin-film encapsulation layer TFEL can be configured to span the display area DA and the non-display area NDA. For example, the thin-film encapsulation layer TFEL can be configured to cover the light-emitting element layer EML and the thin-film transistor layer TFTL in the display area DA and the non-display area NDA.

[0068] The touch sensing layer TSL can be disposed on the thin-film encapsulation layer TFEL. The touch sensing layer TSL can also be directly disposed on the thin-film encapsulation layer TFEL. In the specification, "directly disposed" means "formed by a continuous process," except that components are attached to each other using a separate adhesive layer. Compared to a separate sensing panel including the touch sensing layer TSL attached to the thin-film encapsulation layer TFEL, the thickness of the display device 1 can be reduced by directly disposing the touch sensing layer TSL on the thin-film encapsulation layer TFEL. However, the invention is not limited to this, and another layer, such as an adhesive layer or a substrate, can be inserted between the display panel 10 and the touch sensing layer TSL.

[0069] The touch sensing layer (TSL) can be disposed on the surface from which the image is emitted from the display panel 10, and can sense user touch input. The touch sensing layer (TSL) can recognize touch events of the display device 1 via the user's hand or other input methods. For example, the touch sensing layer (TSL) can recognize touch events capacitively.

[0070] The touch sensing layer (TSL) can include multiple touch electrodes and multiple sensing lines. The touch electrodes and sensing lines can have a single-layer structure or a multi-layer structure.

[0071] Touch electrodes and sensing lines may include, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), PEDOT, metal nanowires, and / or graphene. Touch electrodes and sensing lines may include metal layers such as molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), or alloys thereof. Touch electrodes and sensing lines may have the same layer structure or different layer structures.

[0072] An anti-reflective layer RFL can be disposed on the touch sensing layer TSL. The anti-reflective layer RFL can be used to block external light reflection. For this purpose, the anti-reflective layer RFL may include a light-shielding layer formed of a light-shielding material. Therefore, since a separate polarizing plate can be omitted, the brightness reduction of the display device 1 can be prevented, and the thickness of the display panel 10 can be minimized.

[0073] A cover window (CW) can be disposed on the display panel 10. The cover window (CW) can be disposed on the anti-reflective layer (RFL) of the display panel 10. The cover window (CW) can protect the display panel 10 from external impacts and provide an input surface and / or display surface to the user. The cover window (CW) can be attached to the display panel 10 via an optically transparent adhesive component.

[0074] Cover window CWs can be formed from flexible materials, allowing all or part of the cover window CW to be bent or folded. For example, cover window CWs can have a multilayer structure selected from plastic films and plastic substrates. The multilayer structure can be formed by a continuous process or by an adhesive process using adhesive layers. Examples of plastics that can be used in cover window CWs include polyimide (PI), polyacrylate (PA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene naphthalate (PEN), polyvinylidene chloride (PVDC), polyvinylidene fluoride (PVDF), polystyrene (PS), ethylene vinyl alcohol copolymer (EVOH), polyethersulfone (PES), polyetherimide (PEI), polyphenylene sulfide (PPS), polyarylate (PAR), triacetyl cellulose (TAC), cellulose acetate propionate (CAP), etc., but the invention is not limited thereto.

[0075] The protective layer can also be disposed on the lower surface of the display panel 10 (e.g., a surface on which the touch sensing layer TSL is not disposed). The protective layer can protect the display panel 10 by absorbing and / or dispersing external impacts applied to the display panel 10. In addition, the protective layer can prevent oxygen, moisture, etc. from flowing into the display panel 10 from the outside. The protective layer can be configured in a film shape to further ensure the flexibility of the display device 1.

[0076] Figure 4 This is a diagram illustrating the configuration of display pixels and sensor pixels of a display device according to an embodiment of the present invention.

[0077] Reference Figure 4 A display pixel DPX can indicate a set of subpixels that can represent grayscale. Each display pixel DPX can include multiple subpixels R, G, and B. Subpixels R, G, and B can include a first subpixel R emitting a first color of light, a second subpixel G emitting a second color of light, and a third subpixel B emitting a third color of light. A first subpixel R, a second subpixel G, and a third subpixel B can form a display pixel DPX. In a plan view, the first subpixel R and the third subpixel B can be arranged in a first row along a first direction (X-axis direction). In addition, the second subpixel G and the sensor pixel SPX can be arranged in a second row along the first direction (X-axis direction). However, the invention is not limited thereto.

[0078] Data lines DL1, DL2, DL3, and DL4 can be provided to connect to multiple pixel DPX and SPX respectively. Data lines DL1, DL2, DL3, and DL4 can extend along a second direction (Y-axis direction).

[0079] Data lines DL1, DL2, DL3, and DL4 may include a first data line DL1, a second data line DL2, a third data line DL3, and a fourth data line DL4. These data lines can extend along a second direction (Y-axis direction) and can be arranged sequentially along a first direction (X-axis direction). The first data line DL1 can be connected to a first sub-pixel R, the second data line DL2 can be connected to a second sub-pixel G, the third data line DL3 can be connected to a third sub-pixel B, and the fourth data line DL4 can be connected to a sensor pixel SPX.

[0080] Figure 5 This is a cross-sectional view of the display pixels and sensor pixels of a display device according to an embodiment of the present invention. Figure 6 It is shown Figure 5 A cross-sectional view of the light reflection path in a display device.

[0081] Reference Figure 5 and Figure 6 The display device 1 may include a substrate SUB, an OLED, a light-emitting element TR1, an optical sensor OPD, an optical sensor transistor TR2, etc. For ease of description, the second sub-pixel G in the display pixel DPX is taken as an example. Figure 5 and Figure 6 The cross-sectional structure of the display pixel DPX is shown.

[0082] The substrate SUB can support each layer disposed thereon. The semiconductor layer ACT is disposed on the substrate SUB. A buffer layer can also be disposed between the substrate SUB and the semiconductor layer ACT. The buffer layer can prevent the diffusion of impurity ions and prevent the penetration of moisture.

[0083] The semiconductor layer ACT can form the channels of multiple transistors. For example, the semiconductor layer ACT may include the first semiconductor layer ACT_D of the light-emitting element transistor TR1 and the second semiconductor layer ACT_S of the optical sensor transistor TR2.

[0084] The semiconductor layer ACT may include polycrystalline silicon. Polycrystalline silicon can be formed by crystallizing amorphous silicon. When the semiconductor layer ACT is formed of polycrystalline silicon, and when ions are doped into the semiconductor layer ACT, the ion-doped semiconductor layer ACT can be conductive.

[0085] In an exemplary embodiment of the present invention, the semiconductor layer ACT may include monocrystalline silicon, low-temperature polycrystalline silicon, amorphous silicon, or oxide semiconductor. For example, the oxide semiconductor may include a binary compound (AB) containing indium (In), zinc (Zn), gallium (Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), magnesium (Mg), etc.x ), ternary compound (AB) x C y ) and quaternary compound (AB) x C y D z In an exemplary embodiment of the present invention, the semiconductor layer ACT may include indium tin zinc oxide (ITZO) or indium gallium zinc oxide (IGZO).

[0086] A first insulating layer IL1 is disposed on the semiconductor layer ACT. The first insulating layer IL1 can be disposed on the substrate SUB. For example, the first insulating layer IL1 can be disposed on the entire surface of the substrate SUB. The first insulating layer IL1 can be a gate insulating film with gate insulation function. The first insulating layer IL1 can include silicon compounds, metal oxides, etc. For example, the first insulating layer IL1 can include silicon oxide (SiO₂). x ), silicon nitride (SiN) x ), silicon oxynitride (SiON), aluminum oxide (SiO) x ), tantalum oxide (TaO) x ), Hafnium oxide (HfO) x Zirconium oxide (ZrO) x Titanium oxide (TiO) x The first insulating layer IL1 can be a single-layer film or a multilayer film formed by stacking films of different materials.

[0087] A first conductive layer 110 is disposed on a first insulating layer IL1. The first conductive layer 110 may include at least one metallic material, such as molybdenum (Mo), aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), and / or copper (Cu). The first conductive layer 110 may be a single-layer film or a multilayer film.

[0088] The first conductive layer 110 may include a first gate electrode 110_D of a light-emitting element transistor TR1 and a second gate electrode 110_S of an optical sensor transistor TR2. The first gate electrode 110_D may overlap with the first semiconductor layer ACT_D. The second gate electrode 110_S may overlap with the second semiconductor layer ACT_S.

[0089] A second insulating layer IL2 is disposed on the first conductive layer 110. The second insulating layer IL2 may be disposed on the substrate SUB. For example, the second insulating layer IL2 may be disposed on the entire surface of the substrate SUB. The second insulating layer IL2 may insulate the first conductive layer 110 from the second conductive layer 120. For example, the second insulating layer IL2 may be an interlayer insulating film. The second insulating layer IL2 may comprise the same material as the first insulating layer IL1 described above, or may comprise one or more materials selected from the examples of materials used as the configuration material of the first insulating layer IL1.

[0090] The second conductive layer 120 is disposed on the second insulating layer IL2. The second conductive layer 120 may include at least one metallic material, such as aluminum (Al), molybdenum (Mo), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), and / or copper (Cu). The second conductive layer 120 may be a single-layer film or a multilayer film. For example, the second conductive layer 120 may be formed from a stacked structure such as Ti / Al / Ti, Mo / Al / Mo, Mo / AlGe / Mo, or Ti / Cu.

[0091] The second conductive layer 120 may include a first source electrode 121_D and a first drain electrode 122_D of a light-emitting element transistor TR1, and a second source electrode 121_S and a second drain electrode 122_S of an optical sensor transistor TR2.

[0092] The first source electrode 121_D can be connected to the source region of the first semiconductor layer ACT_D through a contact hole that penetrates the second insulating layer IL2 and the first insulating layer IL1 and exposes one end of the first semiconductor layer ACT_D. Similarly, the first drain electrode 122_D can be connected to the drain region of the first semiconductor layer ACT_D through a contact hole that penetrates the second insulating layer IL2 and the first insulating layer IL1 and exposes the other end of the first semiconductor layer ACT_D.

[0093] The second source electrode 121_S can be connected to the source region of the second semiconductor layer ACT_S through a contact hole that penetrates the second insulating layer IL2 and the first insulating layer IL1 and exposes one end of the second semiconductor layer ACT_S. Similarly, the second drain electrode 122_S can be connected to the drain region of the second semiconductor layer ACT_S through a contact hole that penetrates the second insulating layer IL2 and the first insulating layer IL1 and exposes the other end of the second semiconductor layer ACT_S.

[0094] A third insulating layer IL3 is disposed on the second conductive layer 120. The third insulating layer IL3 may be disposed on the light-emitting element transistor TR1 and the optical sensor transistor TR2 to protect the transistors. The third insulating layer IL3 may comprise the same material as the first insulating layer IL1 described above, or may comprise one or more materials selected from the examples of materials used as the configuration material for the first insulating layer IL1.

[0095] The fourth insulating layer IL4 may be disposed on the third insulating layer IL3. For example, the fourth insulating layer IL4 may be a through-hole layer. The fourth insulating layer IL4 may include organic insulating materials such as acrylic resin (or polyacrylate resin), epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, or benzocyclobutene (BCB).

[0096] The light-emitting element (OLED) and the optical sensor (OPD) are disposed on the fourth insulating layer IL4. Since the thickness of the display panel 10 can be minimized by disposing the light-emitting element (OLED) and the optical sensor (OPD) on the same layer, the folding characteristics of the display device 1 can be improved.

[0097] The OLED (Organic Light-Emitting Device) can be an organic light-emitting device that generates light through the recombination of electrons and holes, but the present invention is not limited thereto. The OLED can be connected to a light-emitting transistor TR1. The OLED may include a first pixel electrode ANO_D, a light-emitting layer EL, and a common electrode CAT.

[0098] For example, the optical sensor OPD can be an optical fingerprint sensor. For example, the optical sensor OPD can be formed from a photodiode, a complementary metal-oxide-semiconductor (CMOS) image sensor, a charge-coupled device (CCD) camera, a phototransistor, etc., but the invention is not limited thereto. The optical sensor OPD can identify fingerprints by sensing the light reflected from the ridge FR and the valley FV between the ridge FR and the ridge F of the finger F.

[0099] For example, when a user's finger F touches the cover window CW, the first light L1 emitted from the light-emitting element OLED can be reflected by the ridge FR or valley FV of finger F, and the reflected second light L2 can pass through the light-transmitting portion TA of the optical pattern layer OPL to reach the optical sensor OPD. The optical sensor OPD can distinguish the second light L2 reflected from the ridge FR of finger F and the second light L2 reflected from the valley FV of finger F to identify the pattern of the user's fingerprint.

[0100] The optical sensor OPD can be connected to the optical sensor transistor TR2. The optical sensor OPD may include a second pixel electrode ANO_S, a light-receiving layer RL, and a common electrode CAT.

[0101] The first pixel electrode ANO_D and the second pixel electrode ANO_S can be formed from the pixel electrode layer ANO.

[0102] The pixel electrode layer ANO can be formed of a metallic material with high reflectivity, such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy, and a stacked structure of APC alloy and ITO (ITO / APC / ITO), but the present invention is not limited thereto.

[0103] The first pixel electrode ANO_D can be connected to the first source electrode 121_D through a contact hole penetrating the fourth insulating layer IL4 and the third insulating layer IL3. However, the present invention is not limited thereto, and for example, the first pixel electrode ANO_D can be connected to the first drain electrode 122_D.

[0104] The second pixel electrode ANO_S can be connected to the second source electrode 121_S through a contact hole penetrating the fourth insulating layer IL4 and the third insulating layer IL3. However, the present invention is not limited thereto, and for example, the second pixel electrode ANO_S can be connected to the second drain electrode 122_S.

[0105] The dam layer BK can be set on the pixel electrode layer ANO.

[0106] The dam layer BK can be formed from an organic film such as acrylic resin, epoxy resin, phenolic resin, polyamide resin or polyimide resin.

[0107] Additionally, the dam layer BK may include light-absorbing materials, or light absorbers may be applied to absorb light introduced from the outside. For example, the dam layer BK may include a carbon-based black pigment. However, the invention is not limited thereto, and the dam layer BK may include opaque metallic materials with high light absorption, such as chromium (Cr), molybdenum (Mo), an alloy of molybdenum and titanium (MoTi), tungsten (W), vanadium (V), niobium (Nb), tantalum (Ta), manganese (Mn), cobalt (Co), or nickel (Ni).

[0108] The dam layer BK may include a first dam BK_D and a second dam BK_S. The first dam BK_D may be disposed on the first pixel electrode ANO_D, and the second dam BK_S may be disposed on the second pixel electrode ANO_S.

[0109] The first dam BK_D may include an opening that exposes the first pixel electrode ANO_D. The opening of the first dam BK_D may form the light-emitting area of ​​the display pixel DPX. For ease of description, Figure 5 Only the luminescent area of ​​the second sub-pixel G is shown in the image.

[0110] The second dam BK_S may include an opening that exposes the second pixel electrode ANO_S. The opening of the second dam BK_S can form the light-receiving area of ​​the sensor pixel SPX.

[0111] An emitting layer EL is disposed in the opening portion of the first embankment BK_D. The emitting layer EL may include organic materials to emit light of a predetermined color. For example, the emitting layer EL may include a hole transport layer, an organic material layer, and an electron transport layer.

[0112] A light-receiving layer RL is disposed in the opening portion of the second embankment BK_S. The light-receiving layer RL can be used to absorb and detect the second light L2 reflected or scattered from the fingerprint of the user's finger F. The fingerprint can be identified by sensing the difference between the amounts of light reflected and scattered from the ridges FR and valleys FV of the fingerprint and absorbed by the light-receiving layer RL. Holes and electrons generated by the light-absorbing layer RL can be transferred to each of the second pixel electrode ANO_S and the common electrode CAT.

[0113] The light-receiving layer RL can be formed from organic photosensitive materials. For example, organic photosensitive materials may include dithioene-based materials (BDN) (bis(4-dimethylaminodithiobenzyl)nickel(II)), benzotriazole-based polymers (PTZBTTT-BDT), porphyrin-based small molecule materials (DHTBTEZP), etc., but the present invention is not limited thereto.

[0114] An electron blocking layer can also be disposed between the light receiving layer RL and the second pixel electrode ANO_S. The electron blocking layer can prevent electrons generated in the light receiving layer RL from moving to the second pixel electrode ANO_S.

[0115] The common electrode CAT can be disposed on the light-emitting layer EL and the light-receiving layer RL. The common electrode CAT can also be disposed on the substrate SUB. For example, the common electrode CAT can be disposed on the entire surface of the substrate SUB. For example, the common electrode CAT can be implemented without being divided by the display pixel DPX and the sensor pixel SPX, and can be implemented as an electrode common to all pixels. For example, the common electrode CAT can be continuously disposed on the display pixel DPX and the sensor pixel SPX.

[0116] The common electrode CAT may include a material layer with a low work function, such as Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF2, Ba, or compounds or mixtures thereof (e.g., mixtures of Ag and Mg). The common electrode CAT may also include a transparent metal oxide layer disposed on the material layer with the low work function.

[0117] The display device 1 according to an exemplary embodiment of the present invention can minimize its thickness by disposing the light-emitting element OLED and the optical sensor OPD on the same layer. Therefore, since the folding characteristics can be improved, a foldable display device 1 can be easily realized.

[0118] The thin-film encapsulation layer TFEL is disposed on the common electrode CAT. (This is based on existing references.) Figure 3 The description of the thin-film encapsulation layer TFEL is used, so repeated descriptions can be omitted.

[0119] The touch sensing layer TSL is disposed on the thin film encapsulation layer TFEL.

[0120] The touch sensing layer TSL includes a touch insulating layer TIL, a touch connection layer TCNT, a touch protective layer TPVX, a first touch conductive layer TCL1, and a second touch conductive layer TCL2. Each of these layers can be formed from a single film, or from a stack of films comprising multiple films. Another layer may also be disposed between each layer.

[0121] The touch insulating layer (TIL) may include an inorganic film. However, the invention is not limited thereto, and for example, the touch insulating layer (TIL) may be formed of an organic film, or may have a structure in which inorganic and organic films are stacked alternately.

[0122] For example, inorganic membranes may include aluminum oxide (AlO2). x Titanium oxide (TiO) x ), silicon dioxide (SiO) x ), silicon oxynitride (SiON), zirconium oxide (ZrO) x ) and hafnium oxide (HfO) x At least one of the following.

[0123] For example, the organic membrane may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, siloxane resin, polyimide (PI) resin, polyamide (PA) resin, and dinaphthalene-containing resin.

[0124] The first touch conductive layer TCL1 can be disposed on the touch insulating layer TIL. The first touch conductive layer TCL1 may include molybdenum (Mo), titanium (Ti), copper (Cu), aluminum (Al), and their alloys. The first touch conductive layer TCL1 can form the first layer of multiple touch electrodes in the touch sensing layer TSL. The first touch conductive layer TCL1 can be configured to overlap with the first barrier BK_D and the second barrier BK_S to prevent a reduction in the aperture ratio of the display pixel DPX and the sensor pixel SPX.

[0125] A touch connection layer TCNT may be disposed on the first touch conductive layer TCL1. The touch connection layer TCNT insulates the first touch conductive layer TCL1 from the second touch conductive layer TCL2. The touch connection layer TCNT may comprise the same material as the touch insulating layer TIL described above, or may comprise one or more materials selected from examples of materials used as configuration materials for the touch insulating layer TIL. For example, the touch connection layer TCNT may comprise an inorganic film, but the invention is not limited thereto.

[0126] The second touch conductive layer TCL2 may be disposed on the touch connection layer TCNT. The second touch conductive layer TCL2 may include the same material as the first touch conductive layer TCL1 described above, or may include one or more materials selected from the examples of materials used as the configuration material of the first touch conductive layer TCL1.

[0127] The second touch conductive layer TCL2 can form a second layer of multiple touch electrodes of the touch sensing layer TSL. The second touch conductive layer TCL2 can be electrically connected to the first touch conductive layer TCL1 through the contact holes penetrating the touch connection layer TCNT. The second touch conductive layer TCL2 can be configured to overlap with the first barrier BK_D and the second barrier BK_S to prevent a reduction in the aperture ratio of the display pixel DPX and the sensor pixel SPX.

[0128] The touch protective layer TPVX can be disposed on the second touch conductive layer TCL2. The touch protective layer TPVX may include an organic film. However, the present invention is not limited thereto, and the touch protective layer TPVX may be formed of an inorganic film, or may have a structure in which organic and inorganic films are alternately stacked.

[0129] For example, the organic membrane may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, siloxane resin, polyimide resin, polyamide resin, and dinaphthalene-containing resin.

[0130] For example, inorganic membranes may include aluminum oxide (AlO2). x Titanium oxide (TiO) x ), silicon dioxide (SiO) x ), silicon oxynitride (SiON), zirconium oxide (ZrO) x ) and hafnium oxide (HfO) x At least one of the following.

[0131] An anti-reflective layer RFL is disposed on the touch sensing layer TSL. Since the anti-reflective layer RFL can block the reflection of external light, a separate polarizing plate can be omitted. Therefore, the brightness of the display device 1 can be prevented from decreasing, and the thickness of the display panel 10 can be minimized.

[0132] The anti-reflective layer RFL can include a light-shielding layer BM and a color filter CF.

[0133] The light-shielding layer BM can be placed on the touch protection layer TPVX.

[0134] The light-shielding layer BM may include an organic light-shielding material. For example, the organic light-shielding material may include at least one of carbon black (CB) and titanium black (TiBK), but the invention is not limited thereto.

[0135] The shading layer BM can be configured to overlap with the embankment layer BK. For example, the shading layer BM can overlap with the embankment layer BK in the third direction (Z-axis direction).

[0136] The light-shielding layer BM may include a first light-shielding layer BM_D that overlaps with the first dam BK_D and a second light-shielding layer BM_S that overlaps with the second dam BK_S.

[0137] The first light-shielding layer BM_D and the second light-shielding layer BM_S can each include an opening.

[0138] The opening portion of the first light-shielding layer BM_D provides an optical path for allowing the first light L1 emitted from the light-emitting element OLED to travel to the cover window CW and reach the top of the display device 1. For this purpose, the opening portion of the first light-shielding layer BM_D can be configured to overlap with the light-emitting element OLED.

[0139] The opening portion of the second light-shielding layer BM_S provides an optical path for allowing the second light L2 reflected from the fingerprint of the user's finger F to travel to the optical sensor OPD. For this purpose, the opening portion of the second light-shielding layer BM_S can be configured to overlap with the optical sensor OPD.

[0140] The color filter CF can be set on the light-shielding layer BM.

[0141] The color filter CF may include a first color filter CF_D disposed on the first light-shielding layer BM_D and a second color filter CF_S disposed on the second light-shielding layer BM_S.

[0142] The first color filter CF_D can be disposed in the opening portion of the first light-shielding layer BM_D and can directly contact the touch protective layer TPVX exposed through the opening portion of the first light-shielding layer BM_D. For example, the first color filter CF_D can extend from the edge of the opening portion of the first light-shielding layer BM_D to the upper surface of the first light-shielding layer BM_D and can directly contact the upper surface of the first light-shielding layer BM_D. The first color filter CF_D can be configured to overlap with the light-emitting element OLED. For example, the first color filter CF_D can be configured to overlap with the display pixel DPX. For ease of description, Figure 5Only the second sub-pixel G is shown, and the first color filter CF_D can be a green color filter. The first color filter CF_D can also include a red color filter overlapping with the first sub-pixel R and a blue color filter overlapping with the third sub-pixel B, respectively.

[0143] The second color filter CF_S can be disposed within an opening in the second light-shielding layer BM_S and can directly contact the touch protective layer TPVX exposed through the opening in the second light-shielding layer BM_S. For example, the second color filter CF_S can extend from the edge of the opening in the second light-shielding layer BM_S to the upper surface of the second light-shielding layer BM_S and can directly contact the upper surface of the second light-shielding layer BM_S. The second color filter CF_S can be configured to overlap with the optical sensor OPD.

[0144] The second color filter CF_S can be formed by a green or cyan color filter to block long-wavelength external light incident on the optical sensor OPD. Therefore, the signal-to-noise ratio (SNR) of the optical sensor OPD can be increased.

[0145] The optical pattern layer OPL can also be disposed between the touch sensing layer TSL and the second color filter CF_S. The optical pattern layer OPL can be disposed in the opening portion of the second light-shielding layer BM_S. For example, the optical pattern layer OPL can be disposed on the optical sensor OPD and overlap with the optical sensor OPD.

[0146] An optical patterning layer (OPL) can be used to remove noise by separating and selectively transmitting light reflected from the ridges (FR) and valleys (FV) of a user's finger (F). This improves the signal-to-noise ratio (SNR) of the fingerprint recognition signal. For this purpose, the OPL may include light-shielding portions (BA) and multiple light-transmitting portions (TA) disposed between the light-shielding portions (BA). For example, the multiple light-transmitting portions (TA) may be openings between the light-shielding portions (BA). Alternatively, the multiple light-transmitting portions (TA) may extend through the light-shielding portions (BA) to expose a portion of the touch protection layer (TPVX).

[0147] The light-shielding portion BA can be disposed on the same layer as the light-shielding layer BM. For example, the light-shielding portion BA can be formed simultaneously with the light-shielding layer BM. The light-shielding portion BA can include the same material as the light-shielding layer BM, or it can include one or more materials selected from the examples of materials used as configuration materials for the light-shielding layer BM. For example, an optical pattern layer OPL with a low modulus can be achieved by forming the light-shielding portion BA using an organic light-shielding material. Therefore, since the foldability of the display panel 10 can be increased, a foldable display device 1 can be easily realized.

[0148] Multiple light-transmitting portions TA can be used to selectively transmit a second light L2 traveling to the optical sensor OPD. The second light L2 is generated by a first light L1 emitted from the light-emitting element layer EML and reflected from the user's finger F.

[0149] The second color filter CF_S can fill multiple light-transmitting portions TA. For example, the second color filter CF_S can directly contact the inner wall of the light-shielding portion BA. Alternatively, the second color filter CF_S can contact a surface of the touch protective layer TPVX exposed by the light-transmitting portion TA.

[0150] The planarization layer OC can also be disposed between the antireflective layer RFL and the cover window CW. The planarization layer OC can be used to planarize the step difference caused by the layer disposed below the planarization layer OC. The planarization layer OC can be an organic film. For example, the organic film may include acrylic resin, epoxy resin, phenolic resin, polyamide resin and / or polyimide resin, but the invention is not limited thereto.

[0151] Figure 7 This is a perspective view showing the path of reflected light in a display device according to an embodiment of the present invention. Figure 8 This is a diagram illustrating sensor pixels and an optical sensor according to an embodiment of the present invention.

[0152] Reference Figure 7 and Figure 8 The cover window (CW) may include multiple sensor pixels (SPX) and a sampling region (SPR) surrounding each of the multiple sensor pixels (SPX). The light-emitting element layer (EML) may include multiple optical sensors (OPD) and a sensing region (SSR) surrounding each of the multiple optical sensors (OPD).

[0153] One sensor pixel SPX on the cover window CW can correspond to at least one optical sensor OPD on the light-emitting element layer EML. For example, one sensor pixel SPX can correspond to approximately 20 to approximately 30 optical sensor OPDs, but the invention is not limited thereto. The sampling area SPR on the cover window CW can correspond to the sensing area SSR on the light-emitting element layer EML.

[0154] Each of the multiple sensor pixels SPX can correspond to a light-transmitting portion TA of the optical patterning layer OPL. For example, as Figure 6 As shown, when the user's finger F touches the cover window CW, each of the multiple sampling areas SPR can reflect the first light L1 output from the display panel 10, and the second light L2 reflected from each of the multiple sampling areas SPR can pass through the light-transmitting portion TA of the optical pattern layer OPL and can be provided to the sensing area SSR of the light-emitting element layer EML.

[0155] Multiple light-transmitting portions TA of the optical pattern layer OPL can be the path of the second light L2 reflected by the user's finger F, allowing the second light L2 to be received by the sensing area SSR. Therefore, multiple optical sensors OPD can sense the second light L2 reflected by the ridge FR and the valley FV between the ridge FR and the finger F, with the ridge FR contacting the sampling area SPR on the cover window CW.

[0156] Display device 1 can sense light reflected by a user's finger F using an optical sensor OPD based on the ratio of fingerprint distance OD to sensor distance ID. Here, fingerprint distance OD corresponds to the distance between the surface of the cover window CW that contacts the user's finger F and the center point of the light-transmitting portion TA of the optical pattern layer OPL. Sensor distance ID corresponds to the distance between the center point of the light-transmitting portion TA and the optical sensor OPD. For example, light reflected from one end (e.g., the first end) of the sensor pixel SPX on the cover window CW can pass through the center point of the light-transmitting portion TA to reach the other end (e.g., the second end) of the optical sensor OPD. Additionally, light reflected from the other end (e.g., the second end opposite to the first end) of the sensor pixel SPX on the cover window CW can pass through the center point of the light-transmitting portion TA to reach one end (e.g., the first end opposite to the second end) of the optical sensor OPD. Therefore, the shape of the fingerprint directly contacting the sensor pixel SPX can differ from the image formed on the optical sensor OPD by approximately 180 degrees.

[0157] The light-transmitting portion TA can be formed with a high aspect ratio to distinguish the light reflected from the ridge FR of the user's finger F from the light reflected from the valley FV, and the light reflected from the ridge FR and the light reflected from the valley FV are provided to different optical sensors OPD. For example, the aspect ratio of the light-transmitting portion TA, as represented by Equation 1, can have a value equal to or greater than 2.

[0158] [Equation 1]

[0159] The aspect ratio of the light-transmitting portion TA = the height t of the light-transmitting portion TA / the line width r of the light-transmitting portion TA (for example, the aspect ratio of the light-transmitting portion TA = t / r).

[0160] Here, the line width r of the light-transmitting portion TA can be the length of the light-transmitting portion TA in the first direction (X-axis direction) or the second direction (Y-axis direction).

[0161] Figure 9 This is a plan view illustrating an example of the optical pattern layer of a display device according to an embodiment of the present invention.

[0162] Reference Figure 6 and Figure 9The optical pattern layer (OPL) may include multiple light-transmitting portions (TAs). For example, the planar shape of the multiple light-transmitting portions (TAs) may be circular. The line width (or, for example, the diameter) r of each of the light-transmitting portions (TAs) may be approximately 3 μm to 20 μm, but the invention is not limited thereto.

[0163] Multiple light-transmitting portions TA can be arranged with a first spacing P1 in a first direction (X-axis direction). For example, as Figure 8 As shown, the first spacing P1 can be approximately 1.3 to approximately 1.5 times the sensor distance ID, and preferably approximately 1.3 times the sensor distance ID.

[0164] Multiple light-transmitting portions TA can be arranged with a second spacing P2 in a second direction (Y-axis direction). For example, the second spacing P2 can be approximately equal to the first spacing P1. As another example, the second spacing P2 can be different from the first spacing P1.

[0165] For example, multiple light-transmitting portions TA can be arranged side-by-side along a first direction (X-axis direction) and a second direction (Y-axis direction). As another example, multiple light-transmitting portions TA can be arranged with a first spacing P1 and a second spacing P2, and can be aligned in directions other than the first direction (X-axis direction) and the second direction (Y-axis direction). For example, multiple light-transmitting portions TA can be arranged in a zigzag or staggered arrangement.

[0166] For example, the first spacing P1 or the second spacing P2 can be proportional to the thickness of the thin-film encapsulation layer TFEL. Increasing the thickness of the TFEL layer increases the fingerprint distance OD, and also increases the area of ​​the sensor pixel SPX and the sampling area SPR. Therefore, the first spacing P1 or the second spacing P2 of the multiple light-transmitting portions TA can be proportional to the thickness of the TFEL layer to adjust the ratio of the fingerprint distance OD to the sensor distance ID.

[0167] For example, the first spacing P1 or the second spacing P2 can be proportional to the distance between the light-emitting elements (OLEDs) or the distance between sub-pixels in the light-emitting element layer EML. As the distance between the light-emitting elements (OLEDs) increases, the distance between the second light L2 reflected by the finger F can also increase. Therefore, the first spacing P1 or the second spacing P2 can be proportional to the distance between the light-emitting elements (OLEDs) or the sub-pixels, such that multiple light-transmitting portions TA serve as paths for the second light L2.

[0168] Figure 10 This is a plan view illustrating an example of the optical pattern layer of a display device according to an embodiment of the present invention. Figure 10 The light-transmitting portion of TA has the same characteristics as... Figure 9The shape of the light-transmitting portion TA varies, and configurations that are substantially the same as those described above will be briefly described or omitted.

[0169] Reference Figure 10 The planar shape of the plurality of light-transmitting portions TA can be quadrilateral. Each of the plurality of light-transmitting portions TA can have a first length d1 in a first direction (X-axis direction) and a second length d2 in a second direction (Y-axis direction). For example, the first length d1 of each of the plurality of light-transmitting portions TA can be approximately 3 μm to 20 μm, but the invention is not limited thereto. For example, the second length d2 of each of the plurality of light-transmitting portions TA can be equal to the first length d1. As another example, the second length d2 of each of the plurality of light-transmitting portions TA can be different from the first length d1.

[0170] In addition, the shape of multiple light-transmitting parts TA is not limited to Figure 9 and Figure 10 The circular and quadrilateral shapes shown are illustrated. For example, multiple light-transmitting portions TA can be formed into various shapes such as ellipses and polygons. Furthermore, multiple light-transmitting portions TA can have different shapes from each other in the optical pattern layer OPL.

[0171] According to the above embodiments, the thickness of the display panel 10 can be minimized by placing the light-emitting element OLED and the optical sensor OPD on the same layer.

[0172] Furthermore, by implementing an optical patterning layer (OPL) with low modulus, the signal-to-noise ratio (SNR) of the fingerprint recognition signal can be increased, and the folding characteristics of the display device 1 can be improved. For example, a foldable display device 1 can be easily realized.

[0173] In the following, exemplary embodiments of the present invention will be described. In the following exemplary embodiments of the present invention, the same configurations as those already described will be indicated by the same reference numerals, and repetitive descriptions may be omitted or simplified.

[0174] Figure 11 This is a cross-sectional view of a display device according to an embodiment of the present invention.

[0175] Figure 11 Display device 1_1 and Figures 1 to 10 The difference in display device 1 is that the optical pattern layer OPL is set on the second color filter CF_S.

[0176] Reference Figure 11 The optical patterning layer OPL can be set between the second color filter CF_S and the planarization layer OC.

[0177] The optical pattern layer OPL may include a light-shielding portion BA and a light-transmitting portion TA that passes through the light-shielding portion BA. For example, the light-transmitting portion TA may be disposed between adjacent light-shielding portions BA. For example, the light-transmitting portion TA may pass through the light-shielding portion BA to expose a portion of the second color filter CF_S.

[0178] The planarization layer OC can fill multiple light-transmitting portions TA. For example, the planarization layer OC can contact the inner wall of the light-shielding portion BA. For example, the planarization layer OC can directly contact the light-shielding portion BA. In addition, the planarization layer OC can contact one surface of the second color filter CF_S exposed by the light-transmitting portion TA.

[0179] Since it has been referenced Figure 5 Other configurations are described, so repeated descriptions can be omitted.

[0180] According to this embodiment, the thickness of the display panel 10 can be minimized by placing the light-emitting element OLED and the optical sensor OPD on the same layer. Furthermore, as described above, by implementing a low-modulus optical pattern layer OPL, the folding characteristics of the display device 1_1 can be improved, and the signal-to-noise ratio (SNR) of the optical sensor OPD can be increased.

[0181] Figure 12 This is a cross-sectional view of a display device according to an embodiment of the present invention.

[0182] Figure 12 Display devices 1_2 and Figures 1 to 10 The difference between display device 1 and display device 2 is that display device 1_2 also includes multiple first transmission patterns TP_D and second transmission patterns TP_S.

[0183] Reference Figure 12 Multiple first transmission patterns TP_D can be disposed on the light-emitting element OLED to overlap with the light-emitting element OLED. The white angular dependency (WAD) of the display device 1_2 can be reduced by disposing the first transmission patterns TP_D on the light-emitting element OLED. Here, WAD refers to the problem of identifying green (or other color) hues at edges based on the observer's viewing angle.

[0184] Multiple first transmission patterns TP_D can be disposed between the touch sensing layer TSL and the first color filter CF_D. Multiple first transmission patterns TP_D can be disposed in the opening portion of the first light-shielding layer BM_D.

[0185] Multiple first transmission patterns TP_D can be arranged at predetermined intervals in a first direction (X-axis direction) or a second direction (Y-axis direction).

[0186] Multiple first transmission patterns TP_D can be formed from inorganic or organic films. For example, the inorganic film can be silicon nitride (SiN). x ) layer, silicon oxynitride (SiON) layer, silicon oxide (SiO) layer x ) layer, titanium oxide (TiO) x ) layer and / or alumina (AlO) x The organic film may be an acrylic resin, epoxy resin, phenolic resin, polyamide (PA) resin, and / or polyimide (PI) resin, but the invention is not limited thereto.

[0187] For example, the upper and side surfaces of multiple first transmission patterns TP_D can be in direct contact with the first color filter CF_D.

[0188] The optical pattern layer OPL' may include multiple second transmission patterns TP_S disposed between multiple light-shielding portions BA.

[0189] Multiple second transmission patterns TP_S can be used to selectively transmit a second light L2 traveling to the optical sensor OPD, the second light L2 being generated by a first light L1 emitted from the light-emitting element layer EML and reflected from the user's finger F.

[0190] For example, multiple second transmission patterns TP_S can directly contact the inner wall of the light-shielding portion BA.

[0191] Multiple second transmission patterns TP_S can pass through the light-shielding portion BA and can be disposed on the touch protection layer TPVX. For example, multiple second transmission patterns TP_S can contact a portion of a surface of the touch protection layer TPVX.

[0192] The plurality of second transmission patterns TP_S may include the same material as the first transmission pattern TP_D described above, or may include one or more materials selected from the examples of materials used as the configuration material for the first transmission pattern TP_D. The plurality of first transmission patterns TP_D and second transmission patterns TP_S may be formed simultaneously.

[0193] Since it has been referenced Figure 5 Other configurations are described, so repeated descriptions can be omitted.

[0194] According to this embodiment, the thickness of the display panel 10 can be minimized by placing the light-emitting element OLED and the optical sensor OPD on the same layer. Furthermore, by implementing a low-modulus optical pattern layer OPL', the folding characteristics of the display device 1_2 can be improved, and the signal-to-noise ratio (SNR) of the optical sensor OPD can be improved.

[0195] Although the invention has been specifically shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.

Claims

1. A display device, including: Substrate; A first display pixel is disposed on the substrate and includes a light-emitting element; A first sensor pixel is disposed on the substrate and includes an optical sensor; A first dam is disposed on the substrate, wherein the first display pixel is disposed in the first dam; The first light-shielding layer overlaps with the first embankment; A first color filter is disposed on the first light-shielding layer and overlaps with the light-emitting element; and An optical pattern layer is disposed on the optical sensor. The optical pattern layer includes a light-shielding portion and multiple light-transmitting portions passing through the light-shielding portion. The light-emitting element includes a first pixel electrode and a light-emitting layer disposed on the first pixel electrode. The optical sensor includes a second pixel electrode and a light-receiving layer disposed on the second pixel electrode, and The first pixel electrode and the second pixel electrode are formed from the same conductive layer.

2. The display device according to claim 1, further comprising: A common electrode is disposed on the light-receiving layer and the light-emitting layer.

3. The display device according to claim 2, further comprising: A first source electrode and a first drain electrode, wherein the first source electrode or the first drain electrode is electrically connected to the first pixel electrode; and A second source electrode and a second drain electrode, wherein the second source electrode or the second drain electrode is electrically connected to the second pixel electrode. The first source electrode, the first drain electrode, the second source electrode, and the second drain electrode are formed from the same conductive layer.

4. The display device according to claim 1, wherein, The light-shielding portion and the first light-shielding layer are formed of the same material.

5. The display device according to claim 1, further comprising: A second dike is disposed on the substrate, wherein the first sensor pixel is disposed within the second dike. The first and second dikes are made of the same material.

6. The display device according to claim 5, further comprising: The second light-shielding layer overlaps with the second embankment. The first light-shielding layer and the second light-shielding layer are formed of the same material.

7. The display device according to claim 1, further comprising: A thin-film encapsulation layer is disposed on the light-emitting element and the optical sensor; A cover window is disposed on the thin-film encapsulation layer; as well as A touch sensing layer is disposed between the thin film encapsulation layer and the cover window.

8. The display device according to claim 1, wherein, The substrate includes: Folded area; The first non-folded region is located on one side of the folded region; and The second non-folded region is located on the other side of the folded region.

9. The display device according to claim 1, wherein, The optical sensor includes a phototransistor or a photodiode.

10. The display device according to claim 1, further comprising: A second color filter is disposed between the optical sensor and the optical pattern layer.

11. The display device according to claim 10, further comprising: A planarization layer is disposed on the optical pattern layer. The planarization layer fills the plurality of light-transmitting portions and is disposed on the inner wall of the light-shielding portion.

12. The display device according to claim 11, wherein, The planarization layer contacts the second color filter through the plurality of light-transmitting portions.

13. A display device, including: Substrate; A first display pixel is disposed on the substrate and includes a light-emitting element; A first sensor pixel is disposed on the substrate and includes an optical sensor; A first dam is disposed on the substrate, wherein the first display pixel is disposed in the first dam; The first light-shielding layer overlaps with the first embankment; A first color filter is disposed on the first light-shielding layer and overlaps with the light-emitting element; and An optical pattern layer is disposed on the optical sensor. The optical pattern layer includes a light-shielding portion and multiple light-transmitting portions passing through the light-shielding portion. The display device further includes: A second color filter is disposed on the optical pattern layer and overlaps with the optical sensor.

14. The display device according to claim 13, wherein, The second color filter fills the plurality of light-transmitting portions and is disposed on the inner wall of the light-blocking portion.

15. The display device according to claim 13, further comprising: A planarization layer covers the first color filter and the second color filter.

16. The display device according to claim 13, further comprising: Multiple first transmission patterns are disposed on the light-emitting element.

17. The display device according to claim 16, wherein, The first color filter is disposed on the upper surface and side surface of the first transmission pattern.

18. The display device according to claim 16, further comprising: A second transmission pattern is disposed in the plurality of light-transmitting portions of the optical pattern layer. The second transmission pattern is formed of the same material as the first transmission pattern.

19. The display device according to claim 18, wherein, The second color filter is disposed on the upper surface of the second transmission pattern and the light-blocking portion.

Images