Display device

Abstract

A display device is provided. The display device includes: a substrate; a plurality of sub-pixels disposed on the substrate and including an organic light-emitting layer; a pixel-defining film disposed between the sub-pixels and separating the sub-pixels; a black matrix disposed on the pixel-defining film, wherein the black matrix absorbs visible light and emits infrared light; and a sensor layer receiving infrared light emitted by the black matrix and reflected from an external object.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2018-0130345 filed on October 30, 2018, in the Korean Intellectual Property Office, the contents of which are incorporated herein in their entirety by reference. Technical Field

[0002] An embodiment of the present disclosure relates to a display device. Background Art

[0003] According to the development of multimedia technology, display devices have become increasingly important. Therefore, various types of display devices such as liquid crystal display (LCD) devices, organic light emitting display devices, etc. have been used.

[0004] The organic light emitting display device displays images using a light emitting diode (OLED) that generates light through the recombination of electrons and holes. The organic light emitting display device has a fast response speed, high brightness, a wide viewing angle, and low power consumption.

[0005] Recently, research and development have been conducted into methods of integrating a sensor for touch recognition or for fingerprint recognition into a display panel, which generally occupies the largest area of ​​a mobile information communication device. Summary of the invention

[0006] Exemplary embodiments of the present disclosure provide a display device that may include a fingerprint recognition sensor without a separate external light source.

[0007] According to an embodiment of the present invention, a display device is provided. The display device includes: a substrate; a plurality of sub-pixels disposed on the substrate, including an organic light-emitting layer; a pixel-defining film disposed between the sub-pixels to separate the sub-pixels; a black matrix disposed on the pixel-defining film, wherein the black matrix absorbs visible light and emits infrared light; and a sensor layer receiving infrared light emitted by the black matrix and reflected from an external object.

[0008] According to another embodiment of the present invention, a display device is provided. The display device includes: a substrate; a plurality of sub-pixels disposed on the substrate, including an organic light-emitting layer; a pixel-defining film disposed between the sub-pixels to separate the sub-pixels; a black matrix disposed on the pixel-defining film, wherein the black matrix absorbs visible light and emits infrared light; and a first sensor layer disposed under the substrate to receive infrared light emitted by the black matrix and reflected from an external object.

[0009] According to another embodiment of the present invention, a display device is provided. The display device includes: a substrate; a light-emitting element layer disposed on the substrate, including a plurality of sub-pixels emitting visible light; a black matrix layer disposed on the light-emitting element layer, including a plurality of black matrices disposed between the sub-pixels, wherein the black matrix absorbs visible light and emits infrared light; and a sensor layer disposed below the black matrix layer, including a plurality of fingerprint recognition sensors, wherein the plurality of fingerprint recognition sensors are infrared sensors, and the infrared sensors receive infrared light emitted by the black matrix and reflected from an external object.

[0010] According to the foregoing and other exemplary embodiments of the present disclosure, since the black matrix can absorb visible light and emit infrared light, and the infrared fingerprint recognition sensor is disposed under the black matrix, fingerprint recognition can be performed without a separate light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 and Figure 2 is a plan view of a display device according to an exemplary embodiment of the present disclosure.

[0012] Figure 3 and Figure 4 is a plan view of a fingerprint recognition area according to an exemplary embodiment of the present disclosure.

[0013] Figure 5 is along Figure 3 A cross-sectional view taken along line AA'.

[0014] Figure 6 is a graph showing absorption and emission through a black matrix as a function of wavelength according to an exemplary embodiment of the present disclosure.

[0015] Figure 7 is a graph showing absorption and emission through a black matrix as a function of wavelength according to another exemplary embodiment of the present disclosure.

[0016] Figure 8 is a cross-sectional view showing how light is output according to an exemplary embodiment of the present disclosure.

[0017] Fig. 9 is a cross-sectional view illustrating how fingerprint recognition is performed according to an exemplary embodiment of the present disclosure.

[0018] Fig.10 is a plan view of a sensor layer according to an exemplary embodiment of the present disclosure.

[0019] Fig.11 is an equivalent circuit diagram of a fingerprint recognition sensor according to an exemplary embodiment of the present disclosure.

[0020] Fig.12is a block diagram of a display device according to an exemplary embodiment of the present disclosure.

[0021] Fig.13 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0022] Fig.14 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure.

[0023] Fig.15 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0024] Fig.16 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure.

[0025] Fig.17 is a plan view of a display device according to another exemplary embodiment of the present disclosure.

[0026] Fig.18 is a plan view of a touch sensor of a display device according to another exemplary embodiment of the present disclosure.

[0027] Fig.19 is a plan view of a portion of a fingerprint recognition area according to another exemplary embodiment of the present disclosure.

[0028] Fig. 20 is along Fig.19 A cross-sectional view taken along line BB'.

[0029] Fig.21 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0030] Fig. 22 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure.

[0031] Fig.23 is a cross-sectional view of a fingerprint recognition area according to another exemplary embodiment of the present disclosure.

[0032] Fig.24 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0033] Fig.25 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure.

[0034] Fig.26 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0035] Fig. 27 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure.

[0036] Fig.28 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure.

[0037] Fig.29 is a plan view of a portion of a fingerprint recognition area according to another exemplary embodiment of the present disclosure.

[0038] Fig.30 is along Fig.29 A cross-sectional view taken along line CC'. DETAILED DESCRIPTION

[0039] By referring to the detailed description of the embodiments and the accompanying drawings below, the features of the inventive concept and the methods for implementing the inventive concept can be more easily understood. However, the inventive concept can be implemented in many different forms and should not be interpreted as being limited to the embodiments set forth herein. Throughout the specification, the same reference numerals may refer to the same elements.

[0040] It will be understood that when an element or layer is referred to as being “on,” “connected to” or “coupled to” another element or layer, it can be directly on, directly connected to or directly coupled to the other element or layer, or intervening elements or layers may be present.

[0041] Throughout the specification, the same or similar components may be denoted by the same reference numerals.

[0042] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0043] Figure 1 and Figure 2 is a plan view of a display device according to an exemplary embodiment of the present disclosure.

[0044] Reference Figure 1 , according to an exemplary embodiment, the display device 10 is divided into a display area DA and a non-display area NDA.

[0045] According to an exemplary embodiment, the display area DA is an area in which an image is displayed, and a plurality of sub-pixels SP are provided in the display area DA. The display area DA may be used as a detector for detecting an external environment. In an exemplary embodiment, at least a portion of the display area DA is a fingerprint recognition area FPA that may recognize a user's fingerprint. That is, the fingerprint recognition area FPA includes the sub-pixels SP and a plurality of fingerprint recognition sensors FPS. That is, the fingerprint recognition area FPA may display an image and may be used to recognize a user's fingerprint, if necessary.

[0046] According to an exemplary embodiment, the non-display area NDA is disposed outside the display area DA and is an area in which no image is displayed. In the non-display area NDA, a speaker module 14, a camera module 15, and a sensor module 16 may be disposed. In an exemplary embodiment, the sensor module 16 may include, for example, at least one of an illumination sensor, a proximity sensor, an infrared sensor, and an ultrasonic sensor. In an exemplary embodiment, the sensor module 16 may recognize the iris of the user. However, the embodiment is not limited thereto, and in other embodiments, other arrangements of the speaker module 14, the camera module 15, and the sensor module 16 are possible.

[0047] In an exemplary embodiment, the display area DA is flat, but the embodiment is not limited thereto. In another embodiment, at least a portion of the display area DA is curved. In addition, in another embodiment, the display area DA extends into an edge area of ​​the display device 10.

[0048] Reference Figure 2 According to an exemplary embodiment, the fingerprint recognition area FPA is in substantially the same area as the display area DA. For example, the display area DA and the fingerprint recognition area FPA may coincide with each other. In this example, the fingerprint recognition function is provided over the entire display area DA.

[0049] According to an exemplary embodiment, each of the fingerprint recognition sensors FPS uses an organic light emitting diode (OLED) including at least one sub-pixel SP as a light source for performing fingerprint recognition. To this end, each of the fingerprint recognition sensors FPS is disposed adjacent to at least one sub-pixel SP, but the embodiments of the present disclosure are not limited thereto. In another embodiment, each of the fingerprint recognition sensors FPS is at least partially overlapped with a single pixel PXL.

[0050] According to an exemplary embodiment, since the fingerprint recognition area FPA including a plurality of fingerprint recognition sensors FPS is provided in the display area DA, a fingerprint recognition function can be provided in the display area DA. In addition, since the display device 10 uses light emitted from the sub-pixel SP to recognize the user's fingerprint, fingerprint recognition can be implemented without a separate external light source. Therefore, the thickness of the display device 10 that can recognize fingerprints can be reduced, and the manufacturing cost of the display device 10 can be reduced.

[0051] An embodiment in which the fingerprint recognition area FPA is a part of the display area DA will be described hereinafter, but embodiments of the present disclosure are not limited thereto.

[0052] Figure 3 and Figure 4 is a plan view of a fingerprint recognition area according to an exemplary embodiment of the present disclosure.

[0053] Reference Figure 3 and Figure 4 According to an exemplary embodiment, a plurality of sub-pixels SP and a plurality of fingerprint recognition sensors FPS are disposed in the fingerprint recognition area FPA. The sub-pixels SP include a blue sub-pixel B, a red sub-pixel R, and a green sub-pixel G.

[0054] According to an exemplary embodiment, the blue sub-pixel B has the same area as the red sub-pixel R, and the blue sub-pixel B and the red sub-pixel R have areas larger than the area of ​​the green sub-pixel G. However, the embodiments of the present disclosure are not limited thereto. In another embodiment, the blue sub-pixel B has an area larger than the area of ​​the red sub-pixel R, and the red sub-pixel R has an area larger than the area of ​​the green sub-pixel G.

[0055] According to an exemplary embodiment, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B have an octagonal shape in a plan view, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B have another polygonal shape, or a circular or elliptical shape in a plan view.

[0056] According to an exemplary embodiment, the fingerprint recognition sensor FPS is disposed between the sub-pixels SP. Figure 3 As shown in , the fingerprint recognition sensor FPS is disposed between all sub-pixels SP, but the embodiments of the present disclosure are not limited thereto. In another embodiment, as Figure 4 As shown in , the fingerprint recognition sensor FPS is disposed between only some of the sub-pixels SP. The fingerprint recognition sensor FPS is shown as not overlapping with the sub-pixels SP, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the fingerprint recognition sensor FPS partially overlaps with the sub-pixels SP. The size, number, resolution, position and / or arrangement of the fingerprint recognition sensor FPS may vary according to various factors, such as the amount of light, resolution, and crosstalk required for the fingerprint recognition sensor FPS to perform fingerprint recognition.

[0057] Figure 5 is along Figure 3 A cross-sectional view taken along line AA'.

[0058] Reference Figure 5 According to an exemplary embodiment, a thin film transistor (TFT) layer TFTL is disposed on a substrate SUB. The TFT layer TFTL includes a TFT 120, a gate insulating film 130, an interlayer insulating film 140, a passivation film 150, and a planarization film 160.

[0059] According to an exemplary embodiment, a buffer film BF is disposed on a substrate SUB. The buffer film BF protects the TFT 120 and the organic light emitting layer 172 of the light emitting element layer EML from moisture penetrating the substrate SUB, which is very susceptible to moisture. The buffer film BF includes a plurality of inorganic films stacked alternately. For example, the buffer film BF may be a multilayer film in which one or more inorganic films such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer are alternately stacked. In other embodiments, the buffer film BF may be omitted.

[0060] According to an exemplary embodiment, the TFTs 120 are disposed on the buffer film BF. Each of the TFTs 120 includes an active layer 121 , a gate electrode 122 , a source electrode 124 , and a drain electrode 123 . Figure 5 A top-gate TFT in which the gate electrode 122 is disposed above the active layer 121 is shown, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the TFT 120 is a bottom-gate TFT in which the gate electrode 122 is disposed below the active layer 121, or a dual-gate TFT in which the gate electrode 122 is disposed above and below the active layer 121.

[0061] According to an exemplary embodiment, the active layer 121 is disposed on the buffer film BF. The active layer 121 may include polycrystalline silicon, single crystal silicon, low temperature polycrystalline silicon, or an oxide semiconductor. For example, the oxide semiconductor may be a binary compound (AB) including indium (In), zinc (Zn), gallium (Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), or magnesium (Mg). x ), ternary compounds (AB x C y ) or quaternary compound (AB x C y D z For example, the active layer 121 may include indium tin zinc oxide (ITZO) or indium gallium zinc oxide (IGZO). A light shielding layer that shields the active layer 121 from external light incident thereon may be disposed between the buffer layer BF and the active layer 121.

[0062] According to an exemplary embodiment, the gate insulating film 130 is disposed on the active layer 121. The gate insulating film 130 includes an inorganic film such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0063] According to an exemplary embodiment, the gate electrode 122 and the gate line are disposed on the gate insulating film 130. The gate electrode 122 and the gate line may be formed as a single-layer film or a multi-layer film using molybdenum (Mo), Al, chromium (Cr), gold (Au), Ti, nickel (Ni), neodymium (Nd), copper (Cu), or an alloy thereof.

[0064] According to an exemplary embodiment, the interlayer insulating film 140 is disposed on the gate electrode 122 and the gate line. The interlayer insulating film 140 includes an inorganic film such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0065] According to an exemplary embodiment, the source electrode 124 and the drain electrode 123 are disposed on the interlayer insulating film 140. The source electrode 124 and the drain electrode 123 are connected to the active layer 121 via contact holes penetrating the gate insulating film 130 and the interlayer insulating film 140. The source electrode 124 and the drain electrode 123 may be formed as a single-layer film or a multi-layer film using Mo, Al, Cr, Au, Ti, Ni, Nd, Cu, or an alloy thereof.

[0066] According to an exemplary embodiment, the passivation film 150 is disposed on the source electrode 124 and the drain electrode 123 and insulates the TFT 120. The passivation film 150 includes an inorganic film such as a silicon nitride layer, a silicon nitride oxide layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer.

[0067] According to an exemplary embodiment, the planarization film 160 is disposed on the passivation film 150 and planarizes a height difference formed by the TFT 120. The planarization film 160 includes an organic film formed of an acrylic resin, an epoxy resin, a phenol resin, a polyamide resin, or a polyimide resin.

[0068] According to an exemplary embodiment, the light emitting element layer EML is disposed on the TFT layer TFTL. The light emitting element layer EML includes a light emitting element 170 and a pixel defining film 180.

[0069] According to an exemplary embodiment, the light emitting element 170 and the pixel defining film 180 are disposed on the planarization film 160. The light emitting element 170 includes a first electrode 171, an organic light emitting layer 172, and a second electrode 173.

[0070] According to an exemplary embodiment, the first electrode 171 is disposed on the planarization film 160. The first electrode 171 is connected to the source electrode 124 of the TFT 120 via a contact hole penetrating the passivation film 150 and the planarization film 160, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the first electrode 171 is connected to the drain electrode 123 of the TFT 120 via a contact hole penetrating the passivation film 150 and the planarization film 160.

[0071] According to an exemplary embodiment, in a top emission structure in which light is emitted in a direction from the organic light emitting layer 172 toward the second electrode 173, the first electrode 171 is formed of a highly reflective metal, such as a stack of aluminum and titanium, for example, Ti / Al / Ti, a stack of aluminum and ITO, for example, ITO / Al / ITO, a silver-target-copper (APC) alloy, or a stack of APC alloy and ITO, for example, ITO / APC / ITO, but the embodiments of the present disclosure are not limited thereto. In a bottom emission structure in which light is emitted in a direction from the organic light emitting layer 172 toward the first electrode 171, the first electrode 171 is formed of a transparent conductive oxide material (TCO) (such as ITO or IZO) through which light can be transmitted, or is formed of a semi-transmissive conductive material such as Mg, silver (Ag) or an alloy thereof. When the first electrode 171 is formed of a semi-transmissive material, the emission efficiency of the display device 10 can be improved by a microcavity. Hereinafter, for convenience of description, the light emitting element 170 will be described as having a top emission structure in which light is emitted from the organic light emitting layer 172 toward the second electrode 173 .

[0072] According to an exemplary embodiment, a pixel defining film 180 is disposed on the planarization layer 160 to separate the first electrode 171 and define the sub-pixels SP1, SP2, and SP3. The pixel defining film 180 covers an edge of the first electrode 171. The pixel defining film 180 includes an organic film formed of an acrylic resin, an epoxy resin, a phenol resin, a polyamide resin, or a polyimide resin.

[0073] According to an exemplary embodiment, the first subpixel SP1, the second subpixel SP2, and the third subpixel SP3 are regions where the first electrode 171, the organic light emitting layer 172, and the second electrode 173 are sequentially stacked so that holes from the first electrode 171 and electrons from the second electrode 173 can be combined together in the organic light emitting layer 172 to emit light. For example, the first subpixel SP1 is a red subpixel R, the second subpixel SP2 is a green subpixel G, and the third subpixel SP3 is a blue subpixel B.

[0074] According to an exemplary embodiment, the organic light emitting layer 172 is disposed on the first electrode 171, and the edge of the organic light emitting layer 172 overlaps the pixel defining film 180. The organic light emitting layer 172 includes an organic material and emits light of a predetermined color. For example, the organic light emitting layer 172 includes a hole transport layer, an organic material layer, and an electron transport layer. In this example, the organic light emitting layer 172 of the red sub-pixel R emits red light, the organic light emitting layer 172 of the green sub-pixel G emits green light, and the organic light emitting layer 172 of the blue sub-pixel B emits blue light. However, the embodiment is not limited thereto, and in another embodiment, the organic light emitting layer 172 of the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 emits white light, in which case the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B further include a red color filter layer, a green color filter layer, and a blue color filter layer, respectively.

[0075] According to an exemplary embodiment, the second electrode 173 is disposed on the organic light emitting layer 172 and the pixel defining film 180. The second electrode 173 covers the organic light emitting layer 172. The second electrode 173 is a common layer formed commonly for the sub-pixels SP1, SP2, and SP3, and a cap layer may be disposed on the second electrode 173.

[0076] According to an exemplary embodiment, in a top emission structure, the second electrode 173 may be formed of a TCO (such as ITO or IZO) through which light can be transmitted, or of a semi-transmissive conductive material such as Mg, Ag, or an alloy thereof. When the second electrode 173 is formed of a semi-transmissive metal material, the emission efficiency of the display device 10 may be improved through a microcavity.

[0077] According to an exemplary embodiment, the thin film encapsulation layer TFEL is disposed on the light emitting element layer EML. The thin film encapsulation layer TFEL includes at least one inorganic film that prevents oxygen or moisture from penetrating into the organic light emitting layer 172 and the second electrode 173. In addition, the thin film encapsulation layer TFEL includes at least one organic film that protects the light emitting element layer EML from foreign substances (such as dust). For example, the thin film encapsulation layer TFEL includes a first inorganic film disposed on the second electrode 173, an organic film disposed on the first inorganic film, and a second inorganic film disposed on the organic film. The first inorganic film and the second inorganic film may be a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer, but the embodiments of the present disclosure are not limited thereto. The organic film may be formed of an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin, but the embodiments of the present disclosure are not limited thereto.

[0078] According to an exemplary embodiment, the sensor layer SL is disposed on the thin film encapsulation layer TFEL. The sensor layer SL includes a fingerprint recognition sensor FPS that can recognize a user's fingerprint. The fingerprint recognition sensor FPS is disposed corresponding to the pixel defining film 180. For example, the fingerprint recognition sensor FPS is disposed not to overlap with the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, but to overlap with the pixel defining film 180, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the fingerprint recognition sensor FPS is disposed to partially overlap with the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, in which case the fingerprint recognition sensor FPS not only overlaps with the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, but also overlaps with the pixel defining film 180.

[0079] According to an exemplary embodiment, the fingerprint recognition sensor FPS is disposed between the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3. In an embodiment, the fingerprint recognition sensor FPS is disposed between all the sub-pixels SP1, SP2, and SP3, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the fingerprint recognition sensor FPS is disposed only between some of the sub-pixels SP1, SP2, and SP3.

[0080] According to an exemplary embodiment, the fingerprint recognition sensor FPS has an area larger than that of the sub-pixels SP1, SP2, and SP3, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the fingerprint recognition sensor FPS has an area less than or equal to that of the sub-pixels SP1, SP2, and SP3.

[0081] According to an exemplary embodiment, the fingerprint recognition sensor FPS is an infrared sensor. The fingerprint includes protruding ridges and recessed valleys, and the amount of time taken by the fingerprint recognition sensor FPS to receive infrared light emitted from a light source or the amount of light received by the fingerprint recognition sensor FPS changes depending on whether the light is reflected by the ridges or valleys. Therefore, the fingerprint recognition sensor FPS analyzes the unique pattern of the fingerprint by measuring the amount of time taken by the fingerprint recognition sensor FPS to receive infrared light emitted from a light source or the amount of light received by the fingerprint recognition sensor FPS. The fingerprint recognition sensor FPS is a photoelectric infrared sensor including a phototransistor or a photodiode, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the fingerprint recognition sensor FPS is a thermal infrared sensor that detects infrared light by measuring physical changes.

[0082] According to an exemplary embodiment, the black matrix BM is disposed on the sensor layer SL. The black matrix BM is disposed corresponding to the peripheral area SA located between the sub-pixels SP. In an embodiment, the black matrix BM is disposed on the sensor layer SL and has the same area as the peripheral area SA, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the black matrix BM overlaps the peripheral area SA, but may have an area smaller than or larger than the area of ​​the peripheral area SA.

[0083] According to an exemplary embodiment, the black matrix BM absorbs visible light and emits infrared light. In an embodiment, the black matrix BM absorbs visible light with a wavelength in the range of 380nm to 770nm emitted by the sub-pixels SP1, SP2, and SP3, and emits infrared light with a wavelength in the range of 800nm ​​to 2000nm. To this end, the black matrix BM includes a black organic material and quantum dots, and the central emission wavelength of the quantum dots is in the range of 700nm to 2200nm or 800nm ​​to 2000nm. The black matrix BM absorbs light in the visible wavelength range and emits light in the infrared wavelength range.

[0084] According to an exemplary embodiment, an overcoat layer OCL is disposed on the black matrix BM. The overcoat layer OCL planarizes the top of the black matrix BM. The overcoat layer OCL is formed of an acrylic epoxy resin material, but the embodiments of the present disclosure are not limited thereto.

[0085] According to an exemplary embodiment, a cover window CW is disposed on the overcoat layer OCL. The cover window CW protects elements of the display device 10 and transmits visible light output by the light emitting element layer EML and infrared light output by the black matrix BM therethrough.

[0086] According to an exemplary embodiment, the cover window CW includes a transparent material such as transparent glass, polyethylene terephthalate, polyethylene resin or polyester, but the embodiments of the present disclosure are not limited thereto. The material of the cover window CW is not specifically limited as long as the cover window CW has sufficient transmittance to allow visible light output by the light emitting element layer EML and infrared light output by the black matrix BM to be transmitted therethrough. In addition, a polarizer is provided between the cover window CW and the outer coating OCL.

[0087] Figure 6 is a graph showing absorption and emission through a black matrix as a function of wavelength according to an exemplary embodiment of the present disclosure, Figure 7 is a graph showing absorption and emission through a black matrix as a function of wavelength according to other exemplary embodiments of the present disclosure. Figure 6 and Figure 7 , the horizontal axis represents the wavelength of light, and the vertical axis represents the transmittance (%) of light in terms of the intensity of light.

[0088] According to an exemplary embodiment, Figure 6The case where the black matrix BM includes ZGGO:Cr is shown. Figure 6 , the first line L1 represents the light absorbed by the black matrix BM, and the second line L2 represents the light emitted by the black matrix BM. Figure 6 As shown in , the black matrix BM absorbs visible light and emits infrared light.

[0089] According to an exemplary embodiment, Figure 7 The case where the black matrix BM includes LGO:Cr is shown. Figure 7 , the first line L1 represents the light absorbed by the black matrix BM, and the second line L2 represents the light emitted by the black matrix BM. Figure 7 As shown in , the black matrix BM absorbs visible light and emits infrared light.

[0090] exist Figure 6 and Figure 7 In the example of , the black matrix BM includes ZGGO:Cr or LGO:Cr, but the embodiments of the present disclosure are not limited thereto. Even when the black matrix BM contains a material that can absorb visible light and emit infrared light, the inherent function of the black matrix BM (i.e., the inherent function of blocking the visible light emitted by the light-emitting element layer EML) is not impaired. In addition, since the infrared light emitted by the black matrix BM can be used as the light source of the fingerprint recognition sensor FPS, a separate light source for the fingerprint recognition sensor FPS is not required.

[0091] Figure 8 is a cross-sectional view showing how light is output according to an exemplary embodiment of the present disclosure, Fig. 9 is a cross-sectional view illustrating how fingerprint recognition is performed according to an exemplary embodiment of the present disclosure. Figure 8 and Fig. 9 An example is shown in which the black matrix BM absorbs visible light and emits infrared light using red visible light.

[0092] Reference Figure 8 According to an exemplary embodiment, the fingerprint recognition area FPA includes sub-pixels SP1, SP2, and SP3 and a peripheral area SA disposed between the sub-pixels SP1, SP2, and SP3. The pixel defining film 180, the fingerprint recognition sensor FPS, and the black matrix BM are disposed above the peripheral area SA. The sub-pixels SP1, SP2, and SP3 include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3, and the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are red sub-pixels R, green sub-pixels G, and blue sub-pixels B, respectively.

[0093] According to an exemplary embodiment, the red light R1 and R2 emitted by the first subpixel SP1 includes a first red light R1 output to an area between the black matrixes BM and a second red light R2 output to the black matrix BM. The first red light R1 penetrates the overcoat layer OCL and the cover window CW and is output as red light RL, and the second red light R2 is incident on the black matrix BM and is converted and output as infrared light IR through the overcoat layer OCL and the cover window CW.

[0094] According to an exemplary embodiment, the green light G1 and G2 emitted by the second subpixel SP2 includes a first green light G1 output to an area between the black matrixes BM and a second green light G2 output to the black matrix BM. The first green light G1 penetrates the overcoat layer OCL and the cover window CW and is output as the green light GL, and the second green light G2 is absorbed by the black matrix BM.

[0095] According to an exemplary embodiment, the blue light B1 and B2 emitted by the third subpixel SP3 includes a first blue light B1 output to an area between the black matrixes BM and a second blue light B2 output to the black matrix BM. The first blue light B1 penetrates the overcoat layer OCL and the cover window CW and is output as the blue light BL, and the second blue light B2 is absorbed by the black matrix BM.

[0096] Reference Fig. 9 According to an exemplary embodiment, in response to a user's finger F being placed in contact with the cover window CW, infrared light IR output from the black matrix BM is reflected by the ridges FR and valleys FV of the user's finger F, and the reflected infrared light is received by the fingerprint recognition sensor FPS, so that the pattern of the user's fingerprint can be recognized. Since the fingerprint recognition sensor FPS is disposed between the pixel defining film 180 and the black matrix BM, the reception sensitivity of the reflected infrared light IR can be improved.

[0097] exist Fig. 9 , according to an exemplary embodiment, the sizes of the sub-pixels SP1, SP2, and SP3 are exaggerated compared to the size of the user's finger F to more clearly illustrate the sub-pixels SP1, SP2, and SP3 and the fingerprint recognition sensor FPS, but the actual sizes of the sub-pixels SP1, SP2, and SP3 and the fingerprint recognition sensor FPS are very small compared to the size of the user's finger F, and the actual intervals between the sub-pixels SP1, SP2, and SP3 and the fingerprint recognition sensor FPS are very small. That is, a plurality of sub-pixels SP1, SP2, and SP3 and a plurality of fingerprint recognition sensors FPS are disposed under the user's finger F, and the fingerprint pattern of the user's finger F is recognized by splicing together the output signals of the fingerprint recognition sensors FPS.

[0098] An embodiment in which the second red light R2 emitted by the first sub-pixel SP1 is converted into infrared light IR has been described above, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the second green light G2 emitted by the second sub-pixel SP2 is converted into infrared light IR by the black matrix BM, and the second red light R2 and the second blue light B2 emitted by the first sub-pixel SP1 and the third sub-pixel SP3, respectively, are absorbed by the black matrix BM. In another embodiment, the second blue light B2 emitted by the third sub-pixel SP3 is converted into infrared light IR by the black matrix BM, and the second red light R2 and the second green light G2 emitted by the first sub-pixel SP1 and the second sub-pixel SP2, respectively, are absorbed by the black matrix BM. In another embodiment, light of different colors emitted by any two sub-pixels among the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are converted into infrared light by the black matrix BM.

[0099] Fig.10 is a plan view of a sensor layer according to an exemplary embodiment of the present disclosure, Fig.11 is an equivalent circuit diagram of a fingerprint recognition sensor according to an exemplary embodiment of the present disclosure, Fig.12 is a block diagram of a display device according to an exemplary embodiment of the present disclosure.

[0100] Reference Fig.10 According to an exemplary embodiment, the sensor layer SL includes a plurality of scan lines SCL, a plurality of readout lines RCL, and a fingerprint recognition sensor FPS. The area in which the fingerprint recognition sensor FPS is disposed is referred to as a fingerprint recognition area FPA.

[0101] According to an exemplary embodiment, the scan lines SCL are connected to their corresponding fingerprint recognition sensors FPS, and the readout lines RCL are connected to their corresponding fingerprint recognition sensors FPS.

[0102] According to an exemplary embodiment, the non-fingerprint recognition area NFPA is located on the outer side of the fingerprint recognition area FPA. The scan driver circuit SCV to which the scan lines SCL are connected is disposed on one side of the non-fingerprint recognition area NFPA.

[0103] According to an exemplary embodiment, the readout circuit RCV to which the readout line RCL is connected is disposed on the other side of the non-fingerprint recognition area NFPA, but the embodiments of the present disclosure are not limited thereto. In another embodiment, a signal may be transmitted from an external integrated circuit to the readout line RCL without the intermediary of the readout circuit RCV.

[0104] According to an exemplary embodiment, the scan lines SCL and the readout lines RCL include a fingerprint recognition sensor pad (also referred to as a “pad” or “bonding pad”) PD-FPS connected to ends of the scan lines SCL and the readout lines RCL.

[0105] According to an exemplary embodiment, the fingerprint recognition sensor pad PD-FPS is formed by the same process as a process of forming a transistor driving the fingerprint recognition sensor FPS.

[0106] According to an exemplary embodiment, the scan signal is sequentially transmitted to the scan line SCL. The readout line RCL receives the signal output from the fingerprint recognition sensor FPS and transmits the received signal to the readout circuit RCV, but the embodiment of the present disclosure is not limited thereto. In another embodiment, the readout line RCL does not transmit the signal output from the fingerprint recognition sensor FPS to the readout circuit RCV, but transmits it to a circuit that processes the signal received from the fingerprint recognition sensor FPS.

[0107] Fig.11 An exemplary fingerprint recognition sensor FPS connected to an arbitrary scan line SCL and an arbitrary readout line RCL is shown, but the structure of the fingerprint recognition sensor FPS is not limited thereto and may vary in other embodiments.

[0108] Reference Fig.11 According to an exemplary embodiment, the fingerprint recognition sensor FPS includes a first transistor TFT1, a second transistor TFT2, and a sensing capacitor CP-FPS.

[0109] According to an exemplary embodiment, a control electrode of a first transistor TFT1 as a switching element is connected to a scan line SCL, an output electrode of the first transistor TFT1 is connected to a readout line RCL, an input electrode of the first transistor TFT1 is connected to a sensing capacitor CP-FPS, an input electrode of the second transistor TFT2 is connected to an input voltage line VDD, an output electrode of the second transistor TFT2 is connected to the sensing capacitor CP-FPS, and a control electrode of the second transistor TFT2 is connected to a common voltage line VSS.

[0110] According to an exemplary embodiment, in response to light reflected from an external object being incident on the second transistor TFT2, a current is generated by a semiconductor in a channel portion formed of amorphous silicon or polycrystalline silicon, and the current flows to the sensing capacitor CP-FPS and the first transistor TFT1 due to the voltage of the input voltage line VDD. That is, the second transistor TFT2 is a phototransistor as a type of optical sensor that converts light energy into electrical energy using a photovoltaic effect in which current varies according to the intensity of light. The phototransistor uses a transistor to amplify the photocurrent. In response to the selection signal being transmitted to the scan line SCL, the current flows through the readout line RCL.

[0111] Reference Fig.12 According to an exemplary embodiment, the display device 10 further includes a sensor controller SC and a display driver PC.

[0112] According to an exemplary embodiment, the sensor controller SC controls the operation of the sensor layer SL and recognizes the fingerprint of the user by detecting a change in the amount of light in the sensor layer SL.

[0113] According to an exemplary embodiment, the display driver PC controls the image display operation of the display panel DP by transmitting an image drive signal to the display panel DP. Here, the display panel DP includes a substrate SUB, a buffer film BF, a thin film transistor (TFT) layer TFTL, a light emitting element layer EML, and a thin film encapsulation layer TFEL. The display driver PC generates an image drive signal using image data and a control signal received from an external source. For example, the display driver PC receives image data and a control signal from an external host, and the control signal includes a vertical synchronization signal, a horizontal synchronization signal, and a main clock signal. The image drive signal includes a scan signal and a data signal generated using the image data.

[0114] According to an exemplary embodiment, the sensor controller SC and the display driver PC may be combined into a single element. For example, the sensor controller SC and the display driver PC may be combined into a single integrated circuit.

[0115] According to an exemplary embodiment, the above reference Figures 10 to 12 The described structure is an exemplary structure for driving the fingerprint recognition sensor FPS, but the embodiments of the present disclosure are not limited thereto. In other embodiments, various other types of sensors that can sense infrared light may be used as the fingerprint recognition sensor FPS.

[0116] Fig.13 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, Fig.14 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure. Fig.13 and Fig.14 An exemplary embodiment of Figure 8 and Fig. 9 The difference of the exemplary embodiment of is that the color filter is arranged above the sub-pixel. Figure 8 and Fig. 9 The differences of the exemplary embodiments are described Fig.13 and Fig.14 An exemplary embodiment of .

[0117] Reference Fig.13 and Fig.14According to an exemplary embodiment, the color filter CF is disposed above the sub-pixels SP1, SP2, and SP3. For example, when the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 are respectively a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, a red color filter Rcf is disposed above the first sub-pixel SP1, a green color filter Gcf is disposed above the second sub-pixel SP2, and a blue color filter Bcf is disposed above the third sub-pixel SP3.

[0118] According to an exemplary embodiment, the color filter CF is disposed on the sensor layer SL in a region between the black matrixes BM, and an edge of the color filter CF partially overlaps a top of the black matrix BM. An overcoat layer OCL is disposed on the black matrix BM and the color filter CF.

[0119] exist Fig.13 and Fig.14 In the exemplary embodiment of the present invention, the color filter CF corresponds to the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3. Therefore, color reproducibility can be improved. In addition, since the polarizing plate can be eliminated, the thickness of the display device 10 can be reduced, and the manufacturing cost of the display device 10 can be reduced.

[0120] Fig.15 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, Fig.16 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure. Fig.15 and Fig.16 An exemplary embodiment of Fig.13 and Fig.14 The difference of the exemplary embodiment of is that the light emitting element layer in which a plurality of sub-pixels are arranged emits white light. Fig.13 and Fig.14 The differences of the exemplary embodiments are described Fig.15 and Fig.16 An exemplary embodiment of .

[0121] Reference Fig.15 and Fig.16 According to an exemplary embodiment, the light emitting element layer EML_1 emits white light W. Specifically, the organic light emitting element layer 172 corresponding to the first sub-pixel SP1 , the second sub-pixel SP2 , and the third sub-pixel SP3 emits white light W.

[0122] According to an exemplary embodiment, each of the organic light emitting element layers 172 is formed by stacking a plurality of light emitting layers emitting light of different colors, and thus emits white light W by combining light of different colors emitted by the plurality of light emitting layers.

[0123] According to an exemplary embodiment, the organic light emitting layer 172 is shown to correspond to the first sub-pixel SP1, the second sub-pixel SP2 and the third sub-pixel SP3, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the organic light emitting layer 172 is formed on the entire surface of the substrate SUB to cover the first electrode 171 and the pixel defining film 180.

[0124] According to an exemplary embodiment, the white light W1 and W2 emitted by the organic light emitting layer 172 disposed in the first subpixel SP1 includes a first white light W1 output to an area between black matrices BM and a second white light W2 output to the black matrix BM. The first white light W1 passes through a red color filter Rcf and is output as red light RL, and the second white light W2 is incident on the black matrix BM and is converted and output as infrared light IR through an overcoat layer OCL and a cover window CW.

[0125] According to an exemplary embodiment, the white light W1 and W2 emitted by the organic light emitting layer 172 disposed in the second sub-pixel SP2 includes a first white light W1 output to an area between the black matrixes BM and a second white light W2 output to the black matrix BM. The first white light W1 passes through a green color filter Gcf and is output as green light GL, and the second white light W2 is incident on the black matrix BM and is converted and output as infrared light IR through the overcoat layer OCL and the cover window CW.

[0126] According to an exemplary embodiment, the white light W1 and W2 emitted by the organic light emitting layer 172 disposed in the third sub-pixel SP3 includes a first white light W1 output to an area between the black matrixes BM and a second white light W2 output to the black matrix BM. The first white light W1 passes through a blue color filter Bcf and is output as blue light BL, and the second white light W2 is incident on the black matrix BM and is converted and output as infrared light IR through an overcoat layer OCL and a cover window CW.

[0127] According to an exemplary embodiment, when the organic light emitting layer 172 entirely emits white light W, infrared light IR is output from the black matrix BM adjacent to the first, second, and third subpixels SP1, SP2, and SP3, and is reflected from the ridges FR or valleys FV of the user's finger F. Therefore, the amount of infrared light IR received by the fingerprint recognition sensor FPS increases, and as a result, the fingerprint pattern can be accurately recognized.

[0128] Fig.17 is a plan view of a display device according to another exemplary embodiment of the present disclosure, Fig.18 is a plan view of a touch sensor of a display device according to another exemplary embodiment of the present disclosure.

[0129] Reference Fig.17According to an exemplary embodiment, in the display device 10_1, the touch detection sensor TDS is provided in the entire display area DA including the fingerprint recognition area FPA. The touch detection sensor TDS is a capacitive type and includes touch electrodes TE and RE that detect a user's touch input and touch lines TL and RPL that connect the pad and the touch electrodes. For example, the touch detection sensor TDS may detect a user's touch input in a self-capacitance manner or in a mutual capacitance manner.

[0130] Reference Fig.18 According to an exemplary embodiment, the display device 10_1 includes a touch sensing area TSA for detecting a user's touch input and a touch peripheral area TPA disposed on the periphery of the touch sensing area TSA. The touch sensing area TSA overlaps the display area DA, and the touch peripheral area TPA overlaps the non-display area NDA.

[0131] According to an exemplary embodiment, touch electrodes TE (e.g., TE1 to TE16) and RE (e.g., RE1 to RE37) are disposed in a touch sensing area TSA. The touch electrodes TE and RE include sensing electrodes RE electrically connected in a first (X) direction and driving electrodes TE electrically connected in a second (Y) direction intersecting the first (X) direction. Fig.18 An embodiment in which the sensing electrodes RE and the driving electrodes TE have a rhombus shape in a plan view is illustrated, but embodiments of the present disclosure are not limited thereto.

[0132] According to an exemplary embodiment, in order to prevent the sensing electrodes RE and the driving electrodes TE from being short-circuited at their intersections, the adjacent driving electrode TE pairs in the second (Y) direction are electrically connected via the connecting electrode BE. In this case, the driving electrodes TE and the sensing electrodes RE are disposed in the same layer, and the connecting electrode BE is disposed in a layer different from the driving electrodes TE and the sensing electrodes RE. The sensing electrodes RE are electrically insulated from the driving electrodes TE.

[0133] According to an exemplary embodiment, the touch lines TL and RPL are disposed in the touch peripheral area TPA. The touch lines TL and RPL include a sensing line RPL (e.g., RPL1 to RPL37) connected to the sensing electrode RE and a first driving line TL1 (e.g., TL11 to TL116) and a second driving line TL2 (e.g., TL21 to TL216) connected to the driving electrode TE.

[0134] According to an exemplary embodiment, the sensing electrode RE is connected to the sensing line RPL. The sensing line RPL is connected to the first touch pad TP1. The first end of the driving electrode TE is connected to the first driving line TL1, and the second end of the driving electrode TE is connected to the second driving line TL2. For example, the first driving line TL1 is connected to the driving electrode TE at the lower side of the touch sensing area TSA, and the second driving line TL2 is connected to the driving electrode TE at the upper side of the touch sensing area TSA. In this example, the second driving line TL2 is connected to the driving electrode TE on the upper side of the touch sensing area TSA located at the outer right side of the touch sensing area TSA. The first driving line TL1 and the second driving line TL2 are connected to the second driving pad TP2. Therefore, the touch driving circuit (not shown) is electrically connected to the driving electrode TE and the sensing electrode RE.

[0135] According to an exemplary embodiment, the touch electrodes TE and RE may be driven in a mutual capacitance manner or in a self-capacitance manner. When the touch electrodes TE and RE are driven in a mutual capacitance manner, a drive signal is transmitted to the drive electrode TE through the first drive line TL1 and the second drive line TL2, so that the mutual capacitance at the intersection of the sensing electrode RE and the drive electrode TE is charged. Then, the charge change in the sensing electrode RE is measured by the sensing line RPL, and the presence of the touch input is determined based on the measured charge change. The drive signal has a plurality of drive pulses.

[0136] According to an exemplary embodiment, when the touch electrodes TE and RE are driven in a self-capacitive manner, a driving signal is transmitted to both the driving electrode TE and the sensing electrode RE through the first driving line TL1, the second driving line TL2, and the sensing line RPL, so that the self-capacitance of the driving electrode TE and the sensing electrode RE is charged. Then, the charge change of the driving electrode TE and the sensing electrode RE is measured through the first driving line TL1, the second driving line TL2, and the sensing line RPL, and the presence of the touch input is determined based on the measured charge change.

[0137] According to an exemplary embodiment, the driving electrodes TE and the sensing electrodes RE are formed as mesh type electrodes. When the sensor layer SL_1 including the driving electrodes TE and the sensing electrodes RE is directly formed on the thin film encapsulation layer TFEL, as shown in FIG. Fig. 20 As shown in , because the second electrode 173 is very close to the driving electrode TE and the sensing electrode RE of the sensor layer SL_1, a very large parasitic capacitance is generated between the second electrode 173 of the light emitting element layer EML and the driving electrode TE or the sensing electrode RE of the sensor layer SL_1. In order to reduce such parasitic capacitance, the driving electrode TE and the sensing electrode RE are formed as mesh-type electrodes instead of being formed as non-patterned electrodes of a transparent oxide conductive layer (such as ITO or IZO), but the embodiments of the present disclosure are not limited thereto.

[0138] Fig.19 is a plan view of a portion of a fingerprint recognition area according to another exemplary embodiment of the present disclosure, Fig. 20 is along Fig.19 For ease of description, Fig.19 and Fig. 20 A region where the driving electrodes TE of the touch detection sensors TDS are disposed is shown, and the following description of this region may also refer to a region where the sensing electrodes RE are disposed.

[0139] Reference Fig.19 According to an exemplary embodiment, a plurality of sub-pixels SP, a driving electrode TE of a touch detection sensor TDS, and a fingerprint recognition sensor FPS are disposed in a fingerprint recognition area FPA.

[0140] According to an exemplary embodiment, the driving electrode TE is a grid-type electrode and includes a plurality of openings OP, and the sub-pixel SP and the fingerprint recognition sensor FPS are arranged corresponding to the openings OP. The openings OP of the driving electrode TE include a first opening OP1 and a second opening OP2. The sub-pixel SP is arranged in the first opening OP1, and the fingerprint recognition sensor FPS is arranged in the second opening OP2. The first opening OP1 and the second opening OP2 are arranged alternately, but the embodiments of the present disclosure are not limited thereto. The first opening OP1 may have the same size as or a different size from the second opening OP2. That is, the size of the first opening OP1 and the size of the second opening OP2 may vary according to the size of the sub-pixel SP and the fingerprint recognition sensor FPS and the spacing between the sub-pixel SP and the fingerprint recognition sensor FPS.

[0141] Reference Fig. 20 According to an exemplary embodiment, the sensor layer SL_1 is disposed on the thin film encapsulation layer TFEL, and includes a touch detection sensor TDS and a fingerprint recognition sensor FPS. Specifically, in the sensor layer SL_1, the drive electrodes TE separated from each other of the touch detection sensor TDS are disposed in the sensor layer SL_1, and the fingerprint recognition sensor FPS is disposed between the drive electrodes TE. In addition, not only the drive electrode TE but also the sensing electrode RE, the first drive line TL1, the second drive line TL2, and the sensing line RPL are disposed on the thin film encapsulation layer TFEL. That is, the drive electrode TE, the sensing electrode RE, the first drive line TL1, the second drive line TL2, and the sensing line RPL are disposed in the same layer and are formed of the same material.

[0142] According to an exemplary embodiment, the first opening OP1 of the drive electrode TE corresponds to the sub-pixel SP, the second opening OP2 of the drive electrode TE corresponds to the peripheral area SA, and the fingerprint recognition sensor FPS is disposed in the second opening OP2. Due to the second opening OP2 of the drive electrode TE, the drive electrode TE and the fingerprint recognition sensor FPS are disposed in the same layer. However, the embodiments of the present disclosure are not limited to this case. In another embodiment, the second opening OP2 of the drive electrode TE is omitted. For example, the drive electrode TE is formed in a shape having a rhombus-shaped first opening OP1, in which case the drive electrode TE and the fingerprint recognition sensor FPS are disposed in different layers.

[0143] In the cross-sectional view, according to an exemplary embodiment, the driving electrode TE is separated from each other by the first opening OP1 and the second opening OP2, and the driving electrode TE and the fingerprint recognition sensor FPS correspond to the peripheral area SA. Therefore, the pixel defining film 180, the driving electrode TE and the fingerprint recognition sensor FPS, and the black matrix BM are sequentially disposed in the peripheral area SA.

[0144] Fig.21 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, Fig. 22 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure. Fig.21 and Fig. 22 An exemplary embodiment of Fig.13 and Fig.14 The difference of the exemplary embodiment of FIG. 1 is that the touch detection sensor is also included in the sensor layer. Fig.13 and Fig.14 The differences of the exemplary embodiments are described Fig.21 and Fig. 22 An exemplary embodiment of .

[0145] Reference Fig.21 and Fig. 22 According to an exemplary embodiment, the display device detects a touch input from a user based on a capacitance change, and detects a fingerprint of the user through infrared light IR. The touch detection sensor TDS and the fingerprint recognition sensor FPS may operate independently, and the touch detection sensor TDS may be used to recognize a fingerprint. For example, a contact with a user's finger F or an area of ​​contact with the user's finger F may be detected based on a touch signal from the touch detection sensor TDS, and a fingerprint recognition mode may be activated.

[0146] In another embodiment, the fingerprint recognition area FPA is an area where a touch signal is generated, and the sub-pixels SP in the fingerprint recognition area FPA are driven in a fingerprint recognition mode. For example, when the fingerprint recognition sensor FPS is set in the entire display area DA, the predetermined area where the touch signal is generated can be determined in real time as the fingerprint recognition area FPA.

[0147] In another embodiment, the sub-pixels SP in the area where the touch signal is generated are driven to emit light, thereby displaying the fingerprint recognition area FPA.

[0148] In this way, according to an exemplary embodiment, since the touch detection sensor TDS can be used for fingerprint recognition, Fig.21 and Fig. 22 The display device can provide more functions.

[0149] Fig.23 is a cross-sectional view of a fingerprint recognition area according to another exemplary embodiment of the present disclosure, Fig.24 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, Fig.25 is a cross-sectional view showing how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure, Fig.26 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, Fig. 27 is a cross-sectional view showing how light is output according to another exemplary embodiment of the present disclosure, and Fig.28 is a cross-sectional view illustrating how fingerprint recognition is performed according to another exemplary embodiment of the present disclosure. Figure 23 to Figure 28 An exemplary embodiment of Figure 8 and Fig. 9 as well as Figures 13 to 16 The difference of the exemplary embodiment of is that the sensor layer is arranged below the substrate. Figure 8 and Fig. 9 as well as Figures 13 to 16 The differences of the exemplary embodiments are described Figure 23 to Figure 28 An exemplary embodiment of .

[0150] Reference Figure 23 to Figure 28 According to an exemplary embodiment, the sensor layer SL_2 is disposed on a bottom surface of the substrate SUB. The bottom surface of the substrate SUB refers to a surface opposite to a top surface of the substrate SUB on which the TFT 120 is disposed.

[0151] According to an exemplary embodiment, the sensor layer SL_2 includes a plurality of fingerprint recognition sensors FPS, and the fingerprint recognition sensors FPS correspond to the peripheral area SA. In response to the user's finger F being placed in contact with the top of the cover window CW, infrared light IR output from the black matrix BM is reflected by the ridge FR or valley FV of the user's finger F, and the reflected infrared light is received by the fingerprint recognition sensor FPS disposed under the substrate SUB, so that the user's fingerprint pattern can be recognized.

[0152] According to an exemplary embodiment, the sensor layer SL_2 includes a light guiding layer LL that helps receive infrared light IR reflected from the user's finger F. The light guiding layer LL is disposed between the substrate SUB and the fingerprint recognition sensor FPS. The light guiding layer LL includes a light guiding path that focuses the infrared light IR reflected from the user's finger F on the fingerprint recognition sensor FPS. For example, the light guiding path may be an optical fiber including a core having a relatively high refractive index and a cladding wrapped around the core and having a refractive index lower than that of the core, but the embodiments of the present disclosure are not limited thereto. In another embodiment, the light guiding path includes an opening. The light guiding path corresponds to the fingerprint recognition sensor FPS.

[0153] According to exemplary embodiments, when the sensor layer SL_2 is disposed under the substrate SUB, the process may be simplified, the fingerprint recognition sensor FPS may be easily aligned with its surroundings, and any reduction in resolution may be prevented because the sensor layer SL_2 is not disposed in an output path of light.

[0154] Fig.29 is a plan view showing a portion of a fingerprint recognition area according to another exemplary embodiment of the present disclosure, Fig.30 is along Fig.29 A cross-sectional view taken along line CC'. Fig.29 and Fig.30 An exemplary embodiment of Fig.19 and Fig. 20 The difference of the exemplary embodiment of FIG. 1 is that the touch detection sensor is arranged in a different layer from the fingerprint recognition sensor. Fig.19 and Fig. 20 The differences of the exemplary embodiments are described Fig.29 and Fig.30 For ease of description, Fig.29 and Fig.30 A region where the driving electrodes TE of the touch detection sensors TDS are disposed is shown, and the following description of this region may also refer to a region where the sensing electrodes RE are disposed.

[0155] Reference Fig.29According to an exemplary embodiment, a plurality of sub-pixels SP, a driving electrode TE of a touch detection sensor TDS, and a fingerprint recognition sensor FPS are disposed in a fingerprint recognition area FPA.

[0156] According to an exemplary embodiment, the driving electrode TE is formed as a mesh type electrode and includes a plurality of openings OP, and the sub-pixels SP are disposed in the openings OP. The fingerprint recognition sensor FPS overlaps the driving electrode TE. For example, the fingerprint recognition sensor FPS is disposed at a cross point of the driving electrode TE.

[0157] Reference Fig.30 According to an exemplary embodiment, a first sensor layer SL1 including a fingerprint recognition sensor FPS is disposed under a substrate SUB, and a second sensor layer SL2 including a touch detection sensor TDS is disposed on a thin film encapsulation layer TFEL.

[0158] According to an exemplary embodiment, the touch detection sensor TDS includes a driving electrode TE. The driving electrode TE includes a first metal layer ML1 and a second metal layer ML2. The first metal layer ML1 is disposed on the thin film encapsulation layer TFEL.

[0159] According to an exemplary embodiment, a first insulating film INS1 is disposed on the first metal layer ML1, and a second metal layer ML2 is disposed on the first insulating film INS1. The second metal layer ML2 is connected to the first metal layer ML1 through a first contact hole CT1 and is formed of the same material as that of the first metal layer ML1.

[0160] According to an exemplary embodiment, the second insulating film INS2 and the third insulating film INS3 are sequentially disposed on the second metal layer ML2, and the connection electrode BE ( Fig.30 ) is disposed on the second insulating film INS2. Fig.29 and Fig.30 The structure of the driving electrode TE is exemplary, and the embodiments of the present disclosure are not limited thereto.

[0161] According to an exemplary embodiment, the fingerprint recognition sensor FPS of the first sensor layer SL1 and the driving electrode TE of the second sensor layer SL2 are disposed in the peripheral area SA. The fingerprint recognition sensor FPS overlaps the driving electrode TE, but the embodiments of the present disclosure are not limited thereto.

[0162] In the peripheral area SA, according to an exemplary embodiment, the fingerprint recognition sensor FPS, the pixel defining film 180, the driving electrode TE, and the black matrix BM are sequentially disposed.

[0163] According to an exemplary embodiment, the width FPSW of the fingerprint recognition sensor FPS is greater than the width TEW of the driving electrode TE. When the first metal layer ML1 has a different width from the second metal layer ML2, the wider width of the first and second metal layers ML1 and ML2 is defined as the width TEW of the driving electrode TE.

[0164] According to an exemplary embodiment, the width FPSW of the fingerprint recognition sensor FPS is in the range of 8 μm to 10 μm, and the width TEW of the driving electrode is in the range of 3 μm to 3.5 μm. However, the embodiments of the present disclosure are not limited thereto. Since the width TEW of the driving electrode TE is smaller than the width FPSW of the fingerprint recognition sensor FPS, the fingerprint recognition sensor FPS can receive infrared light IR reflected by the user's finger F.

[0165] According to an exemplary embodiment, when the fingerprint recognition sensor FPS and the touch detection sensor TDS are provided in different layers, it is not necessary to Fig.19 The second opening OP2 that separates the fingerprint recognition sensor FPS from the driving electrode TE or the sensing electrode RE of the touch detection sensor TDS is formed, and the arrangement of the driving electrode TE and the fingerprint recognition sensor FPS can be simplified.

[0166] Although the exemplary embodiments of the present disclosure have been mainly described, they are not intended to limit the embodiments of the present disclosure, and it will be understood by those skilled in the art that various modifications and applications not shown above may be made without departing from the basic characteristics of the exemplary embodiments of the present invention. For example, the components of the exemplary embodiments of the present disclosure may be practiced by modification. In addition, differences associated with such modifications should be interpreted as being included within the scope of the present disclosure as defined by the claims.

Claims

1. A display device, comprising: substrate; a plurality of sub-pixels disposed on the substrate and comprising an organic light-emitting element emitting visible light; A pixel defining film is disposed between the plurality of sub-pixels to separate the plurality of sub-pixels; a layer of black matrix disposed on the pixel defining film, wherein the black matrix absorbs visible light and emits infrared light; and a first sensor layer, disposed under the substrate and comprising a plurality of fingerprint recognition sensors, the plurality of fingerprint recognition sensors receiving infrared light emitted by the black matrix and reflected from an external object, The pixel defining films in the pixel defining films, the black matrices in the black matrices, and the fingerprint recognition sensors in the plurality of fingerprint recognition sensors are overlapped with each other in a thickness direction of the substrate.

2. The display device according to claim 1, wherein: The multiple fingerprint recognition sensors are infrared sensors.

3. The display device according to claim 2, wherein: The first sensor layer is disposed below the substrate.

4. The display device according to claim 2, wherein: The black matrix includes quantum dots that convert visible light into infrared light.

5. The display device according to claim 4, wherein: The emission wavelength of the black matrix is ​​in the range of 800 nm to 2000 nm.

6. The display device according to claim 4, wherein: The black matrix includes ZGGO:Cr or LGO:Cr.

7. The display device according to claim 3, further comprising: A second sensor layer is disposed between the pixel definition film and the black matrix and includes a touch detection sensor, Wherein, the touch detection sensor includes a first touch electrode and a second touch electrode.

8. The display device according to claim 7, wherein: The plurality of fingerprint recognition sensors, the first touch electrodes, and the second touch electrodes overlap the pixel defining film and the black matrix.

9. The display device according to claim 7, wherein: The plurality of fingerprint recognition sensors are wider than the first touch electrodes and wider than the second touch electrodes.

10. The display device according to claim 3, wherein: The first sensor layer includes a light guide layer disposed between the substrate and the plurality of fingerprint recognition sensors.

11. A display device, comprising: substrate; A light-emitting element layer, disposed on the substrate, comprising a plurality of sub-pixels emitting visible light; a black matrix layer, disposed on the light-emitting element layer, comprising a plurality of black matrices disposed between the plurality of sub-pixels, wherein the plurality of black matrices absorb visible light and emit infrared light; and a sensor layer, disposed below the black matrix layer, wherein the sensor layer includes a plurality of fingerprint recognition sensors and touch electrodes, the plurality of fingerprint recognition sensors are infrared sensors, the infrared sensors receive infrared light emitted by the plurality of black matrices and reflected from external objects, and the touch electrodes detect touch inputs, The plurality of fingerprint recognition sensors and the touch electrodes are stacked with the black matrix layer, and the plurality of fingerprint recognition sensors and the touch electrodes are spaced apart from each other.

12. The display device according to claim 11, further comprising: a layer of a touch detection sensor, the layer of the touch detection sensor including a first touch electrode and a second touch electrode, and Wherein, the light emitting element layer further includes a pixel defining film, which is arranged between the plurality of sub-pixels to separate the plurality of sub-pixels, wherein the plurality of black matrices are arranged on the pixel defining film.

13. A display device, comprising: substrate; a plurality of sub-pixels disposed on the substrate and comprising an organic light-emitting element emitting visible light; A pixel defining film is disposed between the plurality of sub-pixels to separate the plurality of sub-pixels; a layer of black matrix disposed on the pixel defining film, wherein the black matrix absorbs visible light and emits infrared light; and a sensor layer including a plurality of fingerprint recognition sensors and touch electrodes, wherein the plurality of fingerprint recognition sensors receive infrared light emitted by the black matrix and reflected from an external object, and the touch electrodes detect touch input, Wherein, the sensor layer is arranged on the pixel definition film, and the layer of the black matrix is ​​arranged on the sensor layer.

14. The display device according to claim 13, wherein: The multiple fingerprint recognition sensors are infrared sensors.

15. The display device according to claim 13, wherein: The black matrix includes quantum dots that convert visible light into infrared light.

16. The display device according to claim 15, wherein: The emission wavelength of the black matrix is ​​in the range of 800 nm to 2000 nm.

17. The display device according to claim 15, wherein: The black matrix includes ZGGO:Cr or LGO:Cr.

18. The display device according to claim 13, wherein: The sensor layer includes a touch detection sensor, and The touch detection sensor includes a first touch electrode and a second touch electrode.

19. The display device according to claim 18, wherein: The plurality of fingerprint recognition sensors, the first touch electrodes, and the second touch electrodes overlap the pixel defining film and the black matrix.

20. The display device according to claim 18, wherein: The first touch electrode and the second touch electrode include a first opening and a second opening.

21. The display device according to claim 20, wherein: The first opening corresponds to the plurality of sub-pixels, and The second opening corresponds to the plurality of fingerprint recognition sensors.

22. The display device according to claim 21, wherein: The first touch electrodes and the second touch electrodes are disposed in the same layer as the plurality of fingerprint recognition sensors.

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