Display device

Abstract

The present specification discloses a display device. The display device may include a display panel and an optical element disposed below the display panel and configured to emit light to and detect light from outside of the display device, in which the display panel includes a substrate, an encapsulation layer disposed on the substrate, and an optical filter layer disposed on the encapsulation layer, and an optical filter layer disposed between the substrate and the encapsulation layer and configured to filter the emitted light and / or the detected light. The display device has an advantage of increasing the probability that light having a specific wavelength range reaches an object disposed inside or outside the display device.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0078737, filed on June 18, 2024, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] This specification relates to a display device. Background Technology

[0004] Based on the material of the emitting layer, electroluminescent display devices can be classified into inorganic light-emitting display devices and organic light-emitting display devices. Active-matrix organic light-emitting display devices include organic light-emitting diodes (OLEDs). OLEDs generate light themselves and have advantages in high response rate, high luminous efficiency, high brightness, and wide viewing angle. In organic light-emitting display devices, an OLED is formed in each pixel. Organic light-emitting display devices feature high response rate, high luminous efficiency, high brightness, and wide viewing angle, and can present black gradients with perfect or near-perfect blacks, thus achieving high contrast and high color reproduction.

[0005] Recently, various optical components have been added to mobile terminals with display panels. These optical components can be sensors or lighting devices required to support multimedia functions or perform biometric identification. The optical components can be assembled below the display panel. They can be placed in a notch (or section) designed as a recess at the top of the display panel screen, or they can be placed in a punch-hole area on the screen. Because such optical components are placed in a notch or punch-hole area, the screen size of the display panel is limited. Summary of the Invention

[0006] The purpose of this specification may be to address the aforementioned necessities and / or problems in the prior art.

[0007] The embodiments described herein are not limited to the objectives described above, and other objectives not mentioned will be clearly understood by those skilled in the art from the following description.

[0008] A display device according to one aspect of this specification includes: a display panel; and an optical element disposed below the display panel and configured to emit light to the outside of the display device and / or detect light from the outside of the display device, wherein the display panel includes: a substrate, an encapsulation layer disposed on the substrate, and an optical filter layer disposed between the substrate and the encapsulation layer and configured to filter the emitted light and / or the detected light.

[0009] In an aspect, the display device can further include a light emitting element disposed between the substrate and the encapsulation layer, and a circuit layer disposed between the substrate and the light emitting element to drive the light emitting element, wherein the optical filter layer can be disposed between the substrate and the circuit layer.

[0010] In an aspect, the display device can further include a light emitting element disposed between the substrate and the encapsulation layer, wherein the light emitting element can include a light emitting layer, an anode electrode disposed between the substrate and the light emitting layer, and a cathode electrode disposed between the encapsulation layer and the light emitting layer, and the optical filter layer can be disposed on the light emitting element.

[0011] In an aspect, the display device can further include a planarization layer disposed between the substrate and the encapsulation layer, wherein the optical filter layer can be disposed on the planarization layer.

[0012] In an aspect, the display device can further include a color filter layer disposed on the encapsulation layer.

[0013] In an aspect, the display device can further include a touch sensor disposed on the encapsulation layer and including a touch sensor electrode, and a band pass filter disposed to overlap the touch sensor electrode in a thickness direction of the display panel.

[0014] In an aspect, the display panel can include a first area including a first light emitting area, and a second area including a light transmissive area and a second light emitting area, the optical element can include at least one of a first optical element including a light source configured to emit first light, a second optical element including a sensor configured to sense the first light, and a third optical element including a sensor configured to sense second light having a wavelength range different from that of the first light, and the optical filter layer can include at least one of a first optical filter configured to transmit the first light, and a second optical filter configured to transmit the second light.

[0015] In an aspect, the optical element can include a first optical element disposed to overlap the first light emitting area in a thickness direction of the display panel, and the first light emitting area can include a first first light emitting area disposed to overlap the first optical element in the thickness direction of the display panel.

[0016] In an aspect, the optical filter layer can include a first optical filter disposed to overlap the first first light emitting area in a thickness direction of the display panel.

[0017] In an aspect, the optical element can include a first optical element disposed to overlap the second light emitting region in a thickness direction of the display panel, and the second light emitting region can include a first second light emitting region disposed to overlap the first optical element in the thickness direction of the display panel.

[0018] In an aspect, the optical filter layer can include a first optical filter disposed to overlap the first second light emitting region in a thickness direction of the display panel.

[0019] In an aspect, the optical element can include a second optical element disposed to overlap the second light emitting region in a thickness direction of the display panel, and the second light emitting region can include a second second light emitting region disposed to overlap the second optical element in the thickness direction of the display panel.

[0020] In an aspect, the optical filter layer can include a first optical filter disposed to overlap the second second light emitting region in a thickness direction of the display panel.

[0021] In an aspect, the optical element can include a third optical element disposed to overlap the second light emitting region in a thickness direction of the display panel, and the second light emitting region can include a third second light emitting region disposed to overlap the third optical element in the thickness direction of the display panel.

[0022] In an aspect, the optical filter layer can include a second optical filter disposed to overlap the third second light emitting region in a thickness direction of the display panel.

[0023] In an aspect, the optical element can include a first optical element disposed to overlap the light transmissive region in a thickness direction of the display panel, and the light transmissive region can include a first light transmissive region disposed to overlap the first optical element in the thickness direction of the display panel.

[0024] In an aspect, the optical filter layer can include a first optical filter disposed to overlap the first light transmissive region in a thickness direction of the display panel.

[0025] In an aspect, the optical element can include a second optical element disposed to overlap the light transmissive region in a thickness direction of the display panel, and the light transmissive region can include a second light transmissive region disposed to overlap the second optical element in the thickness direction of the display panel.

[0026] In an aspect, the optical filter layer can include a first optical filter disposed to overlap the second light transmissive region in a thickness direction of the display panel.

[0027] In an aspect, the optical element can include a third optical element disposed to overlap the light-transmissive region in a thickness direction of the display panel, the light-transmissive region can include a third light-transmissive region disposed to overlap the third optical element in the thickness direction of the display panel.

[0028] In an aspect, the optical filter layer can include a second optical filter disposed to overlap the third light-transmissive region in a thickness direction of the display panel.

[0029] In an aspect, the display panel can include a plurality of pixels, and a pixel density or resolution of the first region can be higher than a pixel density or resolution of the second region.

[0030] In an aspect, the second region can include groups of pixels spaced apart from each other by a predetermined distance, and the light-transmissive region can be disposed between adjacent groups of pixels.

[0031] In an aspect, the first region can include groups of pixels spaced apart from each other, and adjacent groups of pixels in the second region can be spaced apart from each other by a distance longer than a distance by which adjacent groups of pixels are spaced apart from each other in the first region.

[0032] In an aspect, the light-transmissive region can be a region without pixels and made of a transparent insulating material.

[0033] In an aspect, the first optical filter can block the second light, and the second optical filter can block the first light.

[0034] In an aspect, the first light can be infrared rays, and the second light can be a visible light beam.

[0035] In an aspect, the first optical element can include an infrared light source or a dot projector, the second optical element can include an infrared camera or an infrared sensor, and the third optical element can include a camera, an image sensor, or a visible light sensor.

[0036] In an aspect, the bandpass filter can include a color filter and a black matrix disposed to overlap the touch sensor electrode in a thickness direction of the display panel.

[0037] In an aspect, the encapsulation layer can include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer, the first encapsulation layer and the third encapsulation layer are inorganic films, the second encapsulation layer is an organic film, and the optical filter layer can be disposed between the first encapsulation layer and the second encapsulation layer.

[0038] According to the present specification, reduction in size of an optical element can be achieved. Accordingly, thickness of a display device can be reduced.

[0039] According to the present specification, there is an advantage of increasing the probability of light having a specific wavelength range reaching an element or object disposed inside or outside of a display device when light having a specific wavelength range is desired to reach the element or object disposed inside or outside of the display device.

[0040] According to the present specification, improvement in sensing quality of an element can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0041] The above and other objects, features and advantages of the present specification will become more apparent to one of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings that illustrate preferred embodiments of the application. It is to be understood that the drawings are designed solely for the purpose of illustration and description and in a manner that conveys the essential characteristics of the present specification.

[0042] Figure 1 is a cross-sectional view schematically illustrating a display device having a display panel and an optical element according to one embodiment of the present specification;

[0043] Figure 2 is a diagram illustrating a portion of a display device having an optical element overlapping a second area of a display panel of the display device according to one embodiment of the present specification;

[0044] Figure 3 is a diagram illustrating an example of a display device having an optical element disposed in a second area and a notch area of a display panel of the display device according to one embodiment of the present specification;

[0045] Figure 4 is a block diagram illustrating a display device according to one embodiment of the present specification;

[0046] Figure 5 is a diagram illustrating an example of a mobile device to which a display device according to one embodiment of the present specification is applied;

[0047] Figures 6 to 8 is a circuit diagram illustrating various pixel circuits applicable to a display device according to an embodiment of the present specification;

[0048] Figure 9 is a plan view illustrating a pixel arrangement in a first area of a display panel of a display device according to one embodiment of the present specification;

[0049] Figure 10 is a plan view illustrating a pixel arrangement in a second area of a display panel of a display device according to one embodiment of the present specification;

[0050] Figure 11 is a diagram illustrating an optical element and an optical filter that can be disposed in a display device according to an embodiment of the present specification;

[0051] Figure 12 is a plan view showing a region of a display panel of a display apparatus in which an optical element and an optical filter can be disposed according to one embodiment of the present specification;

[0052] Figure 13 is a cross-sectional view showing a display apparatus according to one embodiment of the present specification;

[0053] Figure 14 is a graph and a cross-sectional view showing an optical element and an optical filter disposed by region of a display apparatus according to one embodiment of the present specification;

[0054] Figure 15 is a graph and a cross-sectional view showing a first optical element and an optical filter disposed in a light emitting region in which a first optical element is disposed of a display apparatus according to one embodiment of the present specification;

[0055] Figure 16 is a graph and a cross-sectional view showing a second optical element and an optical filter disposed in a light emitting region in which a second optical element is disposed of a display apparatus according to one embodiment of the present specification;

[0056] Figure 17 is a graph and a cross-sectional view showing a third optical element and an optical filter disposed in a light emitting region in which a third optical element is disposed of a display apparatus according to one embodiment of the present specification; and

[0057] Figure 18 is a graph and a cross-sectional view showing a first to third optical element and an optical filter disposed in a light transmitting region in which a first to third optical element is disposed of a display apparatus according to one embodiment of the present specification. DETAILED DESCRIPTION

[0058] The advantages and features of the present disclosure and methods for accomplishing the same will be more clearly understood from the following embodiments described with reference to the accompanying drawings. However, the present disclosure is not limited to the following embodiments and can be implemented in various different forms. Rather, these embodiments are provided so that the disclosure will be more complete and complete disclosure of the scope of the present disclosure will be made by those skilled in the art. The present disclosure is limited only by the scope of the appended claims.

[0059] In describing the present disclosure, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions can unnecessarily obscure the subject matter of the present disclosure.

[0060] In the present specification, "comprising." "having," "consisting of," and "consist of" can be used interchangeably unless otherwise clearly specifically stated. In the case where components are expressed in singular form, the singular form includes the plural form unless otherwise clearly specifically stated.

[0061] In describing the positional or interconnection relationship between two components, for example, "on top of," "above," "below," "beside," "connected or coupled with," "crossed," "intersected," and the like, unless "immediately" or "directly" is used, one or more other components can be interposed therebetween.

[0062] In describing the temporal context relationship, for example, "after," "subsequent to," "following," or "before," unless "immediately" or "directly" is used, it can be discontinuous on the time scale.

[0063] The terms "first," "second," and the like can be used to distinguish between multiple components from each other, but the functions or structures of the components are not limited by the ordinal number or the component name in front of the components.

[0064] The following embodiments can be combined or associated with each other in whole or in part, and various types of interlocking and driving are technically feasible. These embodiments can be implemented independently of each other or together in an interrelated relationship.

[0065] The terms used in the embodiments of the present specification (including technical and scientific terms) can be interpreted as having meanings that are commonly understood by those skilled in the art to which the present disclosure pertains, unless explicitly and specifically defined otherwise, and commonly used terms, such as pre-defined terms, can be interpreted in consideration of their meanings in the context of the relevant art.

[0066] In the display device according to the present specification, a pixel circuit and a gate driving circuit can include a plurality of transistors. The transistor can be an oxide thin film transistor (TFT) including an oxide semiconductor or a low temperature polysilicon thin film transistor including low temperature polysilicon (LTPS).

[0067] A transistor is a three-electrode element including a gate electrode, a source electrode, and a drain electrode. The source electrode is an electrode that supplies a carrier to the transistor. In the transistor, the carrier can start from the source electrode. The drain electrode is an electrode through which the carrier flows from the transistor to the outside. In the transistor, the carrier flows from the source electrode to the drain electrode.

[0068] In the case of an n-channel transistor, since the carriers are electrons, the source voltage is lower than the drain voltage, so that electrons can flow from the source electrode to the drain electrode. In the n-channel transistor, current flows from the drain electrode to the source electrode. In the case of a p-channel transistor, since the carriers are holes, the source voltage is higher than the drain voltage, so that holes can flow from the source electrode to the drain electrode. In the p-channel transistor, since holes flow from the source electrode to the drain electrode, current flows from the source electrode to the drain electrode. It should be noted that the source electrode and the drain electrode of the transistor are not fixed. For example, the source electrode and the drain electrode can change depending on the voltage applied thereto. Therefore, the present application can not be limited by the source electrode and the drain electrode of the transistor. In the following description, the source electrode and the drain electrode of the transistor can be referred to as a first electrode and a second electrode.

[0069] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0070] Figure 1 FIG. 1 is a cross-sectional view schematically illustrating a display apparatus having a display panel and an optical element according to an embodiment of the present specification. Figure 2 FIG. 2 is a diagram illustrating a portion of a display apparatus having an optical element overlapping a second area of a display panel of the display apparatus according to an embodiment of the present specification. Figure 3 FIG. 3 is a diagram illustrating an example of a display apparatus having an optical element disposed in a second area and a notch area of a display panel of the display apparatus according to an embodiment of the present specification.

[0071] Referring to Figures 1 to 3 A pixel array constituting a screen of a display panel 100 according to an embodiment of the present specification can include a first area (or section) NML and a second area UD. The first area NML and the second area UD can include pixels to which pixel data of an input image is written. The input image can be displayed in the first area NML and the second area UD.

[0072] The first area NML can be a display area in which a plurality of pixels are arranged so as to reproduce an input image. The first area NML can be larger in size than the second area UD and can be a main display area of the screen in which a majority of the input image is displayed.

[0073] The second area UD can be a display area in which a plurality of pixels are arranged so as to reproduce an input image. The pixel density or resolution of the second area UD can be the same as or less than that of the first area NML. The pixel density can be understood as the number of pixels per inch (PPI). In the present specification, the pixel density refers to the number of pixels arranged and driven in the same unit length or area.

[0074] The second area UD can include a plurality of light-transmissive portions without a light-blocking medium, but is not limited thereto. The light-transmissive portions can be positioned between sub-pixels. Light can pass through the light-transmissive portions with little loss. In a case where the light-transmissive portions of the second area UD are enlarged in order to increase the amount of light received by an optical element disposed under the display panel through the second area UD, the pixel density of the second area UD can decrease due to the area of the light-transmissive portions, and thus the pixel density or resolution of the second area UD can become lower than that of the first area NML.

[0075] Each of the pixels in the first area NML and the second area UD can include sub-pixels of different colors in order to realize colors of an image. The sub-pixels can include red sub-pixels, green sub-pixels, and blue sub-pixels. Hereinafter, the red sub-pixels can be simply referred to as "R sub-pixels", the green sub-pixels can be simply referred to as "G sub-pixels", and the blue sub-pixels can be simply referred to as "B sub-pixels". Each of the pixels can further include a white sub-pixel (hereinafter, simply referred to as a "W sub-pixel"). Each of the sub-pixels can include a pixel circuit that drives a light-emitting element.

[0076] The at least one optical element 200 can be disposed under the rear surface of the display panel 100 so as to overlap the first area NML of the display panel 100. Internal light generated in the optical element 200 can travel through the first area NML to an object located outside the display device.

[0077] The at least one optical element 200 can be disposed under the rear surface of the display panel 100 so as to overlap the second area UD of the display panel 100. External light can travel through the second area UD to the optical element 200 disposed under the display panel 100.

[0078] The optical element 200 can include one or more of an image sensor, a proximity sensor, a white light illuminator, and an optical element for face recognition.

[0079] The optical element for face recognition can include a first optical element disposed under the second area UD of the display panel 100, a second optical element, an infrared illuminator, etc.

[0080] Reference Figure 3 In one embodiment, the second optical element 202, the third optical element 203, the ambient light sensor 204, the proximity sensor 205, and the flood illuminator 206 can be disposed in a notch area 210 of the mobile terminal, and the first optical element 201 can be disposed in the second area UD. The notch area 210 can be a non-display area without pixels at the upper end of the screen of the mobile terminal. However, the present specification is not limited thereto, and the first optical element 201 can be disposed in the first area NML other than the notch area 210 and the second area UD.

[0081] In the display device according to the present specification, since the optical member 200 is disposed below the rear surface of the display panel 100 so as to overlap the second region UD, the display region of the screen is not restricted by the optical member 200. Therefore, with the display device according to the present specification, it is possible to expand the display region of the screen so as to achieve full-screen display, and it is possible to improve the degree of freedom of screen design.

[0082] The display panel 100 can have a width along the X-axis direction, a length along the Y-axis direction, and a thickness along the Z-axis direction. The X-axis direction and the Y-axis direction can intersect each other in the plane of the display panel 100. For example, the X-axis direction and the Y-axis direction can be perpendicular to each other.

[0083] The display panel 100 can include a circuit layer 12 positioned on the substrate 10 and a light emitting element layer 14 positioned on the circuit layer 12. The polarizing plate 18 can be positioned on the light emitting element layer 14, and the cover glass 20 can be positioned on the polarizing plate 18.

[0084] The circuit layer 12 can include a pixel circuit connected to a wire such as a data line, a gate line intersecting the data line, and a power line, and a gate driver connected to the gate line. The circuit layer 12 can include circuit elements such as transistors implemented as thin film transistors (TFTs) and capacitors. The circuit elements and wiring of the circuit layer 12 can be implemented by a plurality of insulating layers, by two or more metal layers spaced apart by a plurality of insulating layers interposed therebetween, and an active layer including a semiconductor material.

[0085] The light emitting element layer 14 can include light emitting elements driven by the pixel circuit. The light emitting elements can be implemented as OLEDs. The OLEDs can include an organic compound layer formed between an anode electrode and a cathode electrode. The organic compound layer can include a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL), but is not limited thereto. When a voltage is applied to the anode electrode and the cathode electrode of the OLED, holes that have passed through the hole transport layer (HTL) and electrons that have passed through the electron transport layer (ETL) move to the emission layer (EML) to form an exciton, thereby causing visible light to be emitted from the emission layer (EML). The OLEDs used as the light emitting elements can have a series structure in which a plurality of emission layers are stacked. The OLEDs having the series structure can improve the brightness and the lifespan of the pixels. The light emitting element layer 14 can further include a color filter array positioned above the light emitting elements so as to selectively transmit red, green, and blue wavelengths.

[0086] The light emitting element layer 14 can be covered with a protective layer, and the protective layer can be covered with an encapsulation layer. The protective layer and the encapsulation layer can have a multi-layer insulating film structure in which an organic film and an inorganic film are alternately stacked. The inorganic film can block the permeation of moisture or oxygen. The organic film can planarize the surface of the inorganic film. When the organic thin film and the inorganic thin film are stacked into a multi-layer, the moving path of moisture or oxygen can become longer than the moving path in a single layer, thereby efficiently blocking the permeation of moisture and oxygen that affect the light emitting element layer 14.

[0087] A touch sensor layer (not shown) can be formed on the encapsulation layer, and a polarizing plate 18 or a color filter layer can be positioned on the touch sensor layer. The touch sensor layer can include a capacitive touch sensor that senses a touch input based on a change in capacitance before and after the touch input. The touch sensor layer can include a metal wiring pattern that forms capacitance of the touch sensor and an insulating film. The insulating film can insulate intersecting portions in the metal wiring pattern and planarize the surface of the touch sensor layer.

[0088] The polarizing plate 18 can convert the polarization of external light reflected by the metal of the touch sensor layer and the circuit layer, in order to improve visibility and contrast. The polarizing plate 18 can be implemented as a linear polarizing plate or a circular polarizing plate that is bonded with a phase retardation film. A cover glass 20 can be bonded to the polarizing plate 18. The color filter layer positioned on the touch sensor layer can include a red filter, a green filter, and a blue filter. The color filter layer can further include a black matrix pattern. The color filter layer can absorb a portion of wavelengths of light reflected from the circuit layer and the touch sensor layer, thereby acting as a substitute for the polarizing plate 18 and increasing color purity of an image reproduced in the pixel array. In this case, the polarizing plate 18 can not be provided.

[0089] The configuration described above is explained in more detail through cross-sectional views described below.

[0090] Figure 4 is a block diagram illustrating a display apparatus according to one embodiment of the present specification. Figure 5 is a diagram illustrating an example of a mobile apparatus to which a display apparatus according to one embodiment of the present specification is applied.

[0091] Referring to Figure 4 and Figure 5 , a display apparatus according to one embodiment of the present specification can include a display panel 100, a display panel driver for writing pixel data of an input image to pixels P of the display panel 100, a timing controller 130 for controlling the display panel driver, and a power supply 150 for generating power required to drive the display panel 100.

[0092] The display panel 100 can include a pixel array for displaying an input image on a screen. The pixel array can be divided into the first area NML and the second area UD as described above.

[0093] The touch sensor can be disposed on the screen of the display panel 100 composed of the pixel array.

[0094] The display panel 100 can be implemented as a flexible display panel in which the pixels P are disposed on a flexible substrate such as a plastic substrate or a metal substrate.

[0095] The display panel driver can reproduce the input image on the screen of the display panel 100 by writing pixel data of the input image to the sub-pixels. The display panel driver can include a data driver 110 (in Figure 3 and Figure 5 also shown as "D-IC") and a gate driver 120. The display panel driver can further include a demultiplexer 112 positioned between the data driver 110 and the data lines DL.

[0096] The display panel driver can operate in a low-speed driving mode under the control of the timing controller 130.

[0097] The data driver 110 can convert pixel data of the input image, which is digital data, using a digital-to-analog converter (hereinafter referred to as "DAC") so as to generate a data voltage Vdata. The data voltage Vdata output from each of the channels of the data driver 110 can be provided to the data lines DL of the display panel 100, or can be provided to the data lines DL through the demultiplexer 112.

[0098] The demultiplexer 112 can distribute the data voltage Vdata output through the channels of the data driver 110 to the plurality of data lines DL in a time-division manner. Due to the presence of the demultiplexer 112, the number of channels of the data driver 110 can be reduced.

[0099] The gate driver 120 can use a shift register to shift a gate signal so as to sequentially provide the gate signal to the gate lines GL.

[0100] The gate driver 120 can be disposed on each of the left and right bezels of the display panel 100 and provide the gate signal to the gate lines GL in a double-feed manner.

[0101] The gate driver 120 can include a first gate driver 121 and a second gate driver 122. The first gate driver 121 can output a scan pulse and a sense pulse, and can shift the scan pulse and the sense pulse according to a shift clock. The second gate driver 122 can output an EM pulse and can shift the EM pulse according to a shift clock.

[0102] The timing controller 130 can receive pixel data of an input image and a timing signal synchronized with the pixel data from the host system HS. The timing signal can include a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a clock CLK, and a data enable signal DE.

[0103] The timing controller 130 can transfer the pixel data of the input image to the data driver 110, and can synchronize the data driver 110, the demultiplexer 112, and the gate driver 120.

[0104] The timing controller 130 can multiply an input frame frequency by i (i is a positive integer greater than zero) in order to control the operation timing of the display panel drivers (110, 112, and 120) at a frame frequency of the input frame frequency x i Hz.

[0105] Based on the timing signal (Vsync, Hsync, and DE) received from the host system HS, the timing controller 130 can generate a data timing control signal for controlling the operation timing of the data driver 110 and a gate timing control signal for controlling the operation timing of the gate driver 120.

[0106] The voltage level of the gate timing control signal output from the timing controller 130 can be converted into a gate high voltage VGH / VEH and a gate low voltage VGL / VEL by a level shifter (which is omitted in the drawing) and provided to the gate driver 120. The level shifter can receive a clock of the gate timing control signal from the timing controller 130 and output a timing signal required for driving the gate driver 120, for example, a start pulse and a shift clock.

[0107] The power supply 150 can adjust a direct current (DC) input voltage from the host system HS in order to generate power required for driving the display panel 100 and the display panel drivers. The power supply 150 can output a DC voltage, for example, a gamma reference voltage, a gate-off voltage VGH / VEH, a gate-on voltage VGL / VEL, a pixel driving voltage ELVDD (see Figure 6 ), a low-potential power voltage ELVSS (see Figure 6 ), an initialization voltage Vini (see Figure 8 ), and a reference voltage VREF.

[0108] The host system HS can be a main circuit board of a television (TV) system, a set-top box, a navigation system, a personal computer (PC), a vehicle system, a home theater system, a mobile device, or a wearable device. The host system HS can include an authentication module.

[0109] Figures 6 to 8 is a circuit diagram illustrating various pixel circuits applicable to a display apparatus according to an embodiment of the present specification.

[0110] Referring to Figure 6 , the pixel circuit can include a light emitting element OLED, a driving element DT that supplies a current to the light emitting element OLED, a switching element M01 that connects a data line DL to a second node n2 in response to a scan pulse SCAN, and a capacitor Cst connected between the second node n2 and a third node n3. The driving element DT and the switching element M01 can be implemented as n-channel transistors.

[0111] The driving element DT can include a gate electrode connected to the second node n2, a first electrode connected to the first node n1, and a second electrode connected to the third node n3. A VDD line PL to which a pixel driving voltage ELVDD is applied can be connected to the first node n1. The light emitting element OLED can include an anode electrode connected to the third node n3 and a cathode electrode connected to a VSS line to which a low potential power voltage ELVSS is applied.

[0112] Referring to Figure 7 , the pixel circuit can further include a second switching element M02 connected between a reference voltage line REFL and the second electrode of the driving element DT. In this pixel circuit, the driving element DT and the switching elements M01 and M02 can be implemented as n-channel transistors.

[0113] Referring to Figure 8 , the pixel circuit can include a light emitting element OLED, a driving element DT that supplies a current to the light emitting element OLED, and a switching circuit that switches a voltage applied to the light emitting element EL and the driving element DT.

[0114] The switching circuit can include an internal compensation circuit that samples a threshold voltage Vth of the driving element DT using a plurality of switching elements M01, M1 to M5 in order to store it in the capacitor Cst and compensates for a gate voltage of the driving element DT by the threshold voltage Vth of the driving element DT. The driving element DT and each of the plurality of switching elements M01, M1 to M5 can be implemented as p-channel TFTs.

[0115] The anode electrode of the light emitting element OLED can be connected to a fourth node n4 located between a fourth switching element M4 and a fifth switching element M5. The fourth node n4 can be connected to the anode electrode of the light emitting element OLED, a second electrode of the fourth switching element M4, and a second electrode of the fifth switching element M5. The cathode electrode of the light emitting element OLED can be connected to a VSS line PL3 to which a low potential power voltage ELVSS is applied.

[0116] The capacitor Cst1 can be connected between a VDD line PL1 and the second node n2.

[0117] The driving element DT can drive the light emitting element OLED by adjusting a current flowing through the light emitting element OLED according to a gate-source voltage Vgs. The driving element DT can include a gate electrode connected to the second node n2, a first electrode connected to the first node n1, and a second electrode connected to the third node n3.

[0118] It should be noted that the pixel circuit is not limited to those shown in Figures 6 to 8 For example, the data voltage Vdata can be applied to the gate electrode of the driving element DT, or can be applied to the first electrode or the second electrode of the driving element DT.

[0119] Figure 9 is a plan view showing a pixel arrangement in a first region of a display panel of a display apparatus according to an embodiment of the present specification. Figure 10 is a plan view showing a pixel arrangement in a second region of a display panel of a display apparatus according to an embodiment of the present specification.

[0120] Referring to Figure 9 , the first region NML can include a plurality of pixels. Each of the pixels can be implemented as a real-type pixel in which R, G, and B sub-pixels of three primary colors constitute a single pixel. Each of the pixels can further include a W sub-pixel (which is omitted in the drawing).

[0121] The pixel density or resolution of the first region NML can be higher than that of the second region. As will be described later, the reference numeral of the second region is UD.

[0122] Each of the pixels can be configured as a pixel consisting of two sub-pixels using a sub-pixel rendering algorithm. For example, a first pixel can consist of an R sub-pixel and a first G sub-pixel, and a second pixel can consist of a B sub-pixel and a second G sub-pixel. In each of the first and second pixels, a deficiency in color representation can be compensated for by averaging corresponding color data between adjacent pixels.

[0123] The sub-pixels can have different light emitting element light emitting efficiencies depending on colors. In consideration of this, the sizes of the sub-pixels can differ depending on their colors. For example, among the R, G, and B sub-pixels, the size of the B sub-pixel can be the largest, and the size of the G sub-pixel can be the smallest.

[0124] Referring to Figure 10The second area UD can include groups of pixels spaced apart from each other by a predetermined distance and light-transmissive portions (or areas) AG disposed between adjacent groups of pixels. Due to the presence of the light-transmissive portions AG, the distance between adjacent groups of pixels in the second area UD can be longer than the distance between adjacent groups of pixels in the first area NML. The groups of pixels disposed in the area indicated by the dotted line can include a plurality of sub-pixels.

[0125] The light-transmissive portions AG can be areas without pixels. Thus, the light-transmissive portions AG lack any pixels. The light-transmissive portions AG can be made of a transparent insulating material and do not include metal lines or pixels. Although the pixel density in the second area UD is lower due to the light-transmissive portions AG, the amount of light received by the optical elements disposed below the display panel can increase since the average light transmittance in the second area UD is higher than the average light transmittance in the first area NML. The light-transmissive portions AG have a circular shape, but are not limited thereto. For example, the light-transmissive portions AG can be designed in various shapes, such as a circular shape, an elliptical shape, a polygonal shape, and an angular shape.

[0126] Figure 11 is a chart illustrating optical elements and optical filters that can be disposed in a display apparatus according to an embodiment of the present specification. Figure 12 is a plan view illustrating an area of a display panel in which optical elements and optical filters can be disposed according to an embodiment of the present specification. In Figure 11 In the chart of , "E" can indicate an embodiment, "T" can indicate transmissive, and "B" can indicate blocking.

[0127] Referring to Figure 11 and Figure 12 , the display apparatus can include a display panel including a first area NML and a second area UD. The first area NML can include a first light-emitting area LE1. The second area UD can include a second light-emitting area LE2 and a light-transmissive area LT.

[0128] The light-emitting area LE can include the first light-emitting area LE1 and the second light-emitting area LE2. The first light-emitting area LE1 can include a first first light-emitting area LE11. The second light-emitting area LE2 can include a first second light-emitting area LE21, a second second light-emitting area LE22, and a third second light-emitting area LE23. The light-transmissive area LT can include a first light-transmissive area LT1, a second light-transmissive area LT2, and a third light-transmissive area LT3.

[0129] The display device according to the first embodiment E1 can include the second region UD in which the optical element 200 is provided. The display device according to the first embodiment E1 can be applied to, for example, a mobile terminal. However, the present specification is not limited to this, and the display device can also be applied to a display of a vehicle. The display device according to the second embodiment E2 can include the first region NML in which the optical element 200 is provided and the second region UD in which the optical element 200 is provided. The display device according to the second embodiment E2 can be applied to, for example, a display of a vehicle. However, the present specification is not limited to this, and the display device can also be applied to a mobile terminal.

[0130] The illustrated diagrams show that the light emitting regions LE, the optical elements 200, or the optical filters OF "may" be provided in the first region NML and / or the second region UD, and it is not necessary to provide all of the specified light emitting regions LE, optical elements 200, and optical filters OF.

[0131] For example, the display device according to the present embodiment can include a second light emitting region LE2. According to the diagram, the second light emitting region LE2 can include a first second light emitting region LE21, a second second light emitting region LE22, and a third second light emitting region LE23. However, the display device according to the above-described embodiments including the second light emitting region LE2 does not need to include all of the above-described light emitting regions LE21, LE22, and LE23. As described below, a corresponding optical element 200 and optical filter OF can be provided in each of the light emitting regions LE21, LE22, and LE23. Therefore, the display device according to the above-described embodiments including the second light emitting region LE2 does not need to include all of the first optical element 201, the second optical element 202, and the third optical element 203. Further, the display device does not need to include both of the first optical filter OF1 and the second optical filter OF2. The display device according to the above-described embodiments can include at least one of the above-described light emitting regions LE21, LE22, and LE23 (which can be included in the second light emitting region LE2).

[0132] As another example, a display apparatus according to the present embodiment can include a light-transmissive region LT. According to the chart, the light-transmissive region LT can include a first light-transmissive region LT1, a second light-transmissive region LT2, and a third light-transmissive region LT3. However, a display apparatus according to the above-described embodiment that includes a light-transmissive region LT need not include all of the above-described light-transmissive regions LT1, LT2, and LT3. As described below, a corresponding optical element 200 and optical filter OF can be provided in each of the above-described light-transmissive regions LT1, LT2, and LT3. Accordingly, a display apparatus according to the above-described embodiment that includes a light-transmissive region LT need not include all of the first optical element 201, the second optical element 202, and the third optical element 203. Further, the display apparatus need not include both the first optical filter OF1 and the second optical filter OF2. A display apparatus according to the above-described embodiment can include at least one of the above-described light-transmissive regions LT1, LT2, and LT3 (which can be included in the light-transmissive region LT).

[0133] Accordingly, a display apparatus according to various embodiments that includes a second light-emitting region LE2 and / or a light-transmissive region LT can be derived according to the chart.

[0134] If a light-emitting region LE is specified, an optical element 200 can be specified. The optical element 200 can be any one of the first optical element 201, the second optical element 202, and the third optical element 203. For example, the first optical element 201 can be provided in a first first light-emitting region LE11. For example, the first optical element 201 can be provided in a first second light-emitting region LE21. The second optical element 202 can be provided in a second second light-emitting region LE22. The third optical element 203 can be provided in a third second light-emitting region LE23. The first optical element 201 can be provided in a first light-transmissive region LT1. The second optical element 202 can be provided in a second light-transmissive region LT2. The third optical element 203 can be provided in a third light-transmissive region LT3.

[0135] The optical filter OF can be any one of a first optical filter OF1 that transmits the first light IR and a second optical filter OF2 that transmits the second light VIS. The optical filter OF can be any one of a first optical filter OF1 that transmits the first light IR and blocks the second light VIS and a second optical filter OF2 that blocks the first light IR and transmits the second light VIS. The degree of transmission and blocking of light is not limited. Blocking can include reflection.

[0136] For example, the first optical filter OF1 can transmit the first light IR to a greater extent than the second light VIS. For example, the second optical filter OF2 can transmit the second light VIS to a greater extent than the first light IR. For example, the first optical filter OF1 can block the first light IR to a lesser extent than the second light VIS. For example, the second optical filter OF2 can block the second light VIS to a lesser extent than the first light IR.

[0137] In an embodiment, the first optical element 201 can include an infrared light source or a dot projector, but the present specification is not limited thereto. In an embodiment, the second optical element 202 can include an infrared camera or an infrared sensor, but the present specification is not limited thereto. In an embodiment, the third optical element 203 can include a camera, an image sensor, or a visible light sensor, but the present specification is not limited thereto.

[0138] In an embodiment, the first light IR can be infrared rays. In an embodiment, the second light VIS can be a visible light beam. However, the present specification is not limited thereto. The wavelength range of the first light IR can be 800 nm to 1100 nm. Specifically, the wavelength range of the first light IR can be 850 nm to 940 nm. The wavelength range of the second light VIS can be 400 nm to 800 nm. However, the wavelength range is not designated as a numerical value, and can be changed within a range that would be obvious to one of ordinary skill in the art.

[0139] The first optical filter OF1 can be disposed to correspond to the first optical element 201. The first optical filter OF1 can be disposed to correspond to the second optical element 202. The second optical filter OF2 can be disposed to correspond to the third optical element 203.

[0140] Accordingly, the first optical filter OF1 can be disposed in the first first light emitting area LE11. The first optical filter OF1 can be disposed in the first second light emitting area LE21. The first optical filter OF1 can be disposed in the second second light emitting area LE22. The second optical filter OF2 can be disposed in the third second light emitting area LE23. The first optical filter OF1 can be disposed in the first light transmission area LT1. The first optical filter OF1 can be disposed in the second light transmission area LT2. The second optical filter OF2 can be disposed in the third light transmission area LT3.

[0141] Accordingly, with reference to FIG. 1, the first optical filter OF1 can be disposed in the first first light emitting area LE11. The first optical filter OF1 can be disposed in the first second light emitting area LE21. The first optical filter OF1 can be disposed in the second second light emitting area LE22. The second optical filter OF2 can be disposed in the third second light emitting area LE23. The first optical filter OF1 can be disposed in the first light transmission area LT1. The first optical filter OF1 can be disposed in the second light transmission area LT2. The second optical filter OF2 can be disposed in the third light transmission area LT3. Figure 12The first optical filter OF1 can be disposed in the first region NML. The first optical element 201 can be disposed in the first region NML. The first optical filter OF1 and the second optical filter OF2 can be disposed in the second region UD. The first optical element 201, the second optical element 202, and the third optical element 203 can be disposed in the second region UD.

[0142] Figure 13 is a cross-sectional view illustrating a display apparatus according to the present embodiment of the present specification.

[0143] Referring to Figure 13 The display apparatus can include a light emitting region LE or a light transmitting region LT. The first region described above can include the light emitting region LE. The second region described above can include the light emitting region LE and / or the light transmitting region LT.

[0144] The light emitting region LE can include a substrate SUBS, a buffer layer BUF, a gate insulating film GI, a transistor T, a bottom shield metal BSM, an interlayer dielectric film ILD, a planarization layer PLN, a light emitting element layer in which a light emitting element OLED is disposed, a bank BK, a first encapsulation layer PAS1, a second encapsulation layer PCL, a third encapsulation layer PAS2, a touch sensor electrode TSM, a bridge electrode BRG, a sensor buffer layer S-BUF, a first sensor interlayer dielectric film S-ILD1, a second sensor interlayer dielectric film S-ILD2, a sensor protection layer S-PAC, and a band pass filter BPF including a color filter CF and a black matrix BM. In addition, the light emitting region LE can include various electrodes or signal lines.

[0145] The light transmitting region LT can include a substrate SUBS, a buffer layer BUF, a planarization layer PLN, a bank BK, a first encapsulation layer PAS1, a second encapsulation layer PCL, a third encapsulation layer PAS2, a sensor buffer layer S-BUF, a first sensor interlayer dielectric film S-ILD1, a second sensor interlayer dielectric film S-ILD2, and a sensor protection layer S-PAC.

[0146] The substrate SUBS can include a plurality of sub-substrates and an intermediate film disposed between the sub-substrates. For example, the intermediate film can be an inorganic film, and thus can block moisture penetration.

[0147] The bottom shield metal BSM can be disposed on the substrate SUBS. The bottom shield metal BSM can be disposed under an active layer of the transistor T. The bottom shield metal BSM can protect the active layer sensitive to light.

[0148] The buffer layer BUF can be a single layer film or a multi-layer film. When the buffer layer BUF is a multi-layer film, the buffer layer BUF can include a multi-layer buffer layer MBUF and an active buffer layer ABUF.

[0149] A plurality of transistors T, storage capacitors, and various electrodes or signal lines can be formed over the buffer layer BUF.

[0150] The transistors formed over the buffer layer BUF can be made of the same material and can be provided in the same layer, but the present specification is not limited to this.

[0151] The transistor T can include an active layer A, a first electrode S, a second electrode D, and a gate electrode G. The active layer A can be provided over the buffer layer BUF. A gate insulating film GI can be provided over the active layer A. The gate electrode G can be provided over the gate insulating film GI, and an interlayer dielectric film ILD can be provided over the gate electrode G.

[0152] The active layer A can include a channel region overlapping with the gate electrode G, a source connection region located on one side of the channel region, and a drain connection region located on the other side of the channel region. The active layer A can include an oxide semiconductor material. For example, the oxide semiconductor material can include indium gallium zinc oxide (IGZO), indium gallium zinc tin oxide (IGZTO), ZnO, CdO, InO, zinc tin oxide (ZTO), and zinc indium tin oxide (ZITO). The active layer A can include a silicon-based semiconductor material. For example, the silicon-based semiconductor material can include low-temperature polysilicon (LTPS).

[0153] The first electrode S and the second electrode D of the transistor T can be provided over the gate insulating film GI and the interlayer dielectric film ILD. The first electrode S and the second electrode D of the transistor T can be connected to the first source connection region and the first drain connection region in the active layer A, respectively, through a via in the gate insulating film GI and the interlayer dielectric film ILD.

[0154] A planarization layer PLN can be provided over the transistor T. The planarization layer PLN can be provided over the first electrode S and the second electrode D of the transistor T.

[0155] Although not shown, a connection electrode connecting the first electrode S and the anode electrode ANO can be additionally provided. The connection electrode can be an electrode for relaying electrical connection between the first electrode S and the anode electrode ANO. The connection electrode can be connected to the first electrode S through a via in the planarization layer PLN.

[0156] A light emitting element OLED can be formed in the light emitting element layer. The light emitting element OLED can be driven by the transistor T. In an embodiment, the light emitting element OLED can be an organic light emitting element. In this case, the light emitting element OLED can include an anode electrode ANO, a cathode electrode CAT, and a light emitting layer EL disposed between the anode electrode ANO and the cathode electrode CAT. The light emitting layer EL can include an organic compound layer. The organic compound layer can include a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL), but the present specification is not limited thereto.

[0157] In a case where a voltage is applied to the anode electrode ANO and the cathode electrode CAT of the light emitting element OLED, holes passing through the hole transport layer and electrons passing through the electron transport layer can be moved to the emission layer so as to form an exciton, and light having a wavelength range of visible light can be emitted from the emission layer. The light emitting element OLED can have a series structure in which a plurality of emission layers are stacked. Since the light emitting element OLED has the series structure, the brightness and the lifespan of the pixel can be improved. The light emitting element layer can emit any one of red light, green light, blue light, and white light, but the present specification is not limited thereto. When the light emitting element layer emits white light, any one of red light, green light, and blue light can be emitted through a color filter CF disposed thereabove.

[0158] The anode electrode ANO can be connected to the first electrode S through a via in the planarization layer PLN. A bank BK can be disposed on the anode electrode ANO. The bank BK can overlap at least a portion of the anode electrode ANO. The light emitting layer EL can be disposed on the anode electrode ANO. The cathode electrode CAT can be disposed on the light emitting layer EL.

[0159] An encapsulation layer can be disposed on the cathode electrode CAT. The encapsulation layer can be a layer that prevents moisture or oxygen from permeating to the light emitting element OLED disposed below the encapsulation layer. The encapsulation layer can prevent moisture or oxygen from permeating to the light emitting layer EL.

[0160] The encapsulation layer can be formed as a single layer or multiple layers. The encapsulation layer can include a first encapsulation layer PAS1, a second encapsulation layer PCL, and a third encapsulation layer PAS2. The first encapsulation layer PAS1 and the third encapsulation layer PAS2 can be inorganic films, and the second encapsulation layer PCL can be an organic film. When the second encapsulation layer PCL is made of an organic film, the second encapsulation layer PCL can also function as a planarization layer.

[0161] A touch sensor can be disposed on the encapsulation layer. The touch sensor can include a touch sensor electrode TSM and a bridge electrode BRG. The touch sensor can also include insulating films, for example, a sensor buffer layer S-BUF, a first sensor interlayer dielectric film S-ILD1, a second sensor interlayer dielectric film S-ILD2, and a sensor protection layer S-PAC.

[0162] The sensor buffer layer S-BUF can be disposed on the encapsulation layer, the bridge electrode BRG can be disposed on the sensor buffer layer S-BUF, and the first sensor interlayer dielectric film S-ILD1 and the second sensor interlayer dielectric film S-ILD2 can be disposed on the bridge electrode BRG.

[0163] The touch sensor electrode TSM can be disposed on the first sensor interlayer dielectric film S-ILD1 and the second sensor interlayer dielectric film S-ILD2. A portion of the touch sensor electrode TSM can be connected to the bridge electrode BRG through a hole in the first sensor interlayer dielectric film S-ILD1 and the second sensor interlayer dielectric film S-ILD2.

[0164] A plurality of touch sensor electrodes TSM can constitute one touch electrode (or one touch electrode line) and can be disposed in a grid and electrically connected. A portion of the touch sensor electrode TSM can be electrically connected to another portion of the touch sensor electrode TSM through the bridge electrode BRG so as to constitute one touch electrode (or one touch electrode line).

[0165] The sensor protection layer S-PAC can be disposed to cover the touch sensor electrode TSM and the bridge electrode BRG.

[0166] A color filter layer including a band pass filter BPF can be disposed on the encapsulation layer. The band pass filter BPF can prevent visible light from entering the touch sensor TSM. Accordingly, the sensing sensitivity of the touch sensor can be improved. The band pass filter BPF can be disposed to overlap the touch sensor electrode TSM in a thickness direction (e.g., a Z-axis direction) of the display panel.

[0167] The band pass filter BPF can include a color filter CF and a black matrix BM.

[0168] The color filter CF can be formed to substantially face the light emitting layer EL. As described above, the color filter CF can selectively convert a wavelength range of light to be transmitted so as to implement any one color selected from a group including red, green, and blue, to a wavelength range corresponding to visible light.

[0169] The black matrix BM can prevent light from entering the touch sensor electrode TSM. Accordingly, the black matrix BM can be disposed below the touch sensor electrode TSM so as to overlap the touch sensor electrode TSM in a thickness direction of the display panel.

[0170] A black matrix BM can be disposed between color filters CF implementing different colors, or between color filters CF implementing the same color.

[0171] By disposing the optical filter OF (which has been disposed in the existing third optical element) in the display panel including the light emitting region LE and the light transmitting region LT, the display apparatus according to the present specification can achieve a size reduction of the optical element 200. Accordingly, the thickness of the display apparatus can be reduced. Accordingly, it is advantageous to optimize the process, thereby reducing the production energy consumption, and reducing the weight of the display apparatus. In addition, by applying the optical filter OF as an optical filter for filtering (e.g., transmitting and / or blocking) the first light and / or the second light, an improvement in sensing quality can be achieved.

[0172] Accordingly, the display apparatus can further include an optical filter layer OF-P disposed in the display panel and including the optical filter OF as described above. As shown in the cross-sectional view, the optical filter layer OF-P can be divided into a first optical filter layer OF-P1, a second optical filter layer OF-P2, a third optical filter layer OF-P3, a fourth optical filter layer OF-P4, and a fifth optical filter layer OF-P5 according to the position where the optical filter layer is disposed. However, the position where the optical filter layer OF-P is disposed is not limited to the position shown in the drawing, and the scope of the present specification is only limited by the content recited in the claims.

[0173] The first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5 can be disposed between the substrate SUBS and the package layer PAS1, PCL, or PAS2. The first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5 can at least partially overlap the optical element 200 in a thickness direction (e.g., a Z-axis direction) of the display device. For example, at least a portion of light entering the optical element 200 or emitted from the optical element 200 can be transmitted through or blocked by the first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5. For example, all light can be transmitted through or blocked by the first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5.

[0174] The first optical filter layer OF-P1, the second optical filter layer OF-P2, and the third optical filter layer OF-P3 can be optical filter layers OF-P disposed in the light emitting region LE. The fourth optical filter layer OF-P4 and the fifth optical filter layer OF-P5 can be optical filter layers OF-P disposed in the light transmitting region LT. Since the second region can include the light transmitting region LT, the fourth optical filter layer OF-P4 and the fifth optical filter layer OF-P5 disposed in the light transmitting region LT can be included in the second region.

[0175] Although examples in which the optical filter layers are provided in the display apparatus have been described due to the limitation of the size of the drawings, the first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5 can not all be located in one display apparatus.

[0176] For example, the display apparatus can include only the first optical filter layer OF-P1. For example, the display apparatus can include only the second optical filter layer OF-P2. For example, the display apparatus can include only the third optical filter layer OF-P3. For example, the display apparatus can include only the fourth optical filter layer OF-P4. For example, the display apparatus can include only the fifth optical filter layer OF-P5.

[0177] For example, the display apparatus can include the first optical filter layer OF-P1 and the second optical filter layer OF-P2. For example, the display apparatus can include the first optical filter layer OF-P1 and the third optical filter layer OF-P3. For example, the display apparatus can include the first optical filter layer OF-P1 and the fourth optical filter layer OF-P4. For example, the display apparatus can include the first optical filter layer OF-P1 and the fifth optical filter layer OF-P5. For example, the display apparatus can include the second optical filter layer OF-P2 and the third optical filter layer OF-P3. For example, the display apparatus can include the second optical filter layer OF-P2 and the fourth optical filter layer OF-P4. For example, the display apparatus can include the second optical filter layer OF-P2 and the fifth optical filter layer OF-P5. For example, the display apparatus can include the third optical filter layer OF-P3 and the fourth optical filter layer OF-P4. For example, the display apparatus can include the third optical filter layer OF-P3 and the fifth optical filter layer OF-P5. For example, the display apparatus can include the fourth optical filter layer OF-P4 and the fifth optical filter layer OF-P5.

[0178] As described above, the optical filter layers OF-P illustrated in the drawings are used to show the positions of the optical filter layers OF-P and are not intended to limit the number of optical filter layers OF-P that can be included in the display apparatus. Various combinations of the first optical filter layer OF-P1, the second optical filter layer OF-P2, the third optical filter layer OF-P3, the fourth optical filter layer OF-P4, and the fifth optical filter layer OF-P5 can also be included in the display apparatus according to the present specification.

[0179] A first optical filter layer OF-P1 can be provided on the substrate SUBS. The first optical filter layer OF-P1 can be provided between the substrate SUBS and the transistor T. The transistor T can be included in the circuit layer described above. The first optical filter layer OF-P1 can be provided between the buffer layer BUF and the gate insulating film GI. The first optical filter layer OF-P1 can be provided between the bottom shield metal BSM and the active layer A.

[0180] A second optical filter layer OF-P2 can be provided on the substrate SUBS. The second optical filter layer OF-P2 can be provided between the substrate SUBS and the encapsulation layer PAS1, PCL, or PAS2. The second optical filter layer OF-P2 can be provided on the planarization layer PLN. The second optical filter layer OF-P2 can be provided on the light emitting element OLED. The second optical filter layer OF-P2 can be provided between the light emitting element OLED and the encapsulation layer PAS1, PCL, or PAS2. The second optical filter layer OF-P2 can be provided between the cathode electrode CAT and the first encapsulation layer PAS1.

[0181] A third optical filter layer OF-P3 can be provided on the substrate SUBS. The third optical filter layer OF-P3 can be provided between the substrate SUBS and the encapsulation layer PAS1, PCL, or PAS2. The third optical filter layer OF-P3 can be provided on the planarization layer PLN. The third optical filter layer OF-P3 can be provided on the light emitting element OLED. The third optical filter layer OF-P3 can be provided between the light emitting element OLED and the encapsulation layer PAS1, PCL, or PAS2. The third optical filter layer OF-P3 can be provided between the cathode electrode CAT and the second encapsulation layer PCL. The third optical filter layer OF-P3 can be provided between the cathode electrode CAT and the third encapsulation layer PAS2. The third optical filter layer OF-P3 can be provided between the first encapsulation layer PAS1 and the second encapsulation layer PCL.

[0182] A fourth optical filter layer OF-P4 can be provided on the substrate SUBS. The fourth optical filter layer OF-P4 can be provided between the substrate SUBS and the planarization layer PLN. The fourth optical filter layer OF-P4 can be provided between the substrate SUBS and the transistor T. The fourth optical filter layer OF-P4 can not overlap the transistor T in a thickness direction of the display device. The fourth optical filter layer OF-P4 can be provided between the buffer layer BUF and the encapsulation layer PAS1, PCL, or PAS2. The fourth optical filter layer OF-P4 can be provided between the active buffer layer ABUF and the planarization layer PLN. The fourth optical filter layer OF-P4 can be formed in the same layer and of the same material as the first optical filter layer OF-P1.

[0183] A fifth optical filter layer OF-P5 can be disposed on the substrate SUBS. The fifth optical filter layer OF-P5 can be disposed between the substrate SUBS and the packaging layer PAS1, PCL, or PAS2. The fifth optical filter layer OF-P5 can be disposed between the planarization layer PLN and the packaging layer PAS1, PCL, or PAS2. The fifth optical filter layer OF-P5 can be disposed on the first packaging layer PAS1. The fifth optical filter layer OF-P5 can be disposed between the first packaging layer PAS1 and the second packaging layer PCL. The fifth optical filter layer OF-P5 can be formed in the same layer and of the same material as the third optical filter layer OF-P3.

[0184] Figure 14 FIG. 1 is a diagram and cross-sectional view illustrating optical elements and optical filters disposed by area of a display apparatus according to an embodiment of the present specification. Figure 15 FIG. 2 is a diagram and cross-sectional view illustrating a first optical element and optical filters in a light emitting area in which the first optical element is disposed according to an embodiment of the present specification. Figure 16 FIG. 3 is a diagram and cross-sectional view illustrating a second optical element and optical filters in a light emitting area in which the second optical element is disposed according to an embodiment of the present specification. Figure 17 FIG. 4 is a diagram and cross-sectional view illustrating a third optical element and optical filters in a light emitting area in which the third optical element is disposed according to an embodiment of the present specification. Figure 18 FIG. 5 is a diagram and cross-sectional view illustrating first to third optical elements and optical filters in a light transmitting area in which the first to third optical elements are disposed according to an embodiment of the present specification. In Figures 14 to 18 In the diagram of FIG. 5, “T” can indicate transmission, and “B” can indicate blocking.

[0185] Referring to Figure 14 The direction of travel of the first light IR or the second light VIS can be determined by the type of the optical element 201, 202, or 203. For example, since the first optical element 201 emits the first light IR, the direction of travel of the light can be a direction toward the outside of the display apparatus. For example, since the second optical element 202 and the third optical element 203 respectively sense the first light IR and the second light VIS, the directions of travel of the first light IR and the second light VIS can be directions toward the inside of the display apparatus.

[0186] As described above with reference to the cross-sectional view, the optical filters OF1 and OF2 can be disposed inside the display panel. In the diagram, the optical filters OF1 and OF2 disposed above and below the light emitting elements OLED of the light emitting element layer 14 are simply illustrated.

[0187] Referring toFigure 15 The first optical filter OF1 can be disposed in the first light-emitting region LE11 or the first second light-emitting region LE21 in which the first optical element 201 is disposed. Thus, the first light IR among the light traveling in a direction from the inside of the display device toward the outside of the display device can be transmitted. The second light VIS can be blocked. The first light IR can be more selectively transmitted to the outside of the display device compared to the second light VIS. When it is desired that the first light IR reaches an object disposed outside the display device, the display device according to the present embodiment has an advantage of increasing the probability that the first light IR reaches the object located outside the display device.

[0188] Referring to Figure 16 The first optical filter OF1 can be disposed in the second second light-emitting region LE22 in which the second optical element 202 is disposed. Thus, the first light IR among the light traveling in a direction from the outside of the display device toward the inside of the display device can be transmitted. The second light VIS can be blocked. The first light IR can be more selectively transmitted to the inside of the display device compared to the second light VIS. When it is desired that the first light IR reaches an element disposed inside the display device, the display device according to the present embodiment has an advantage of increasing the probability that the first light IR reaches the element located inside the display device.

[0189] Referring to Figure 17 The second optical filter OF2 can be disposed in the third second light-emitting region LE23 in which the third optical element 203 is disposed. Thus, the second light VIS among the light traveling in a direction from the outside of the display device toward the inside of the display device can be transmitted. The first light IR can be blocked. The second light VIS can be more selectively transmitted to the inside of the display device compared to the first light IR. When it is desired that the second light VIS reaches an element disposed inside the display device, the display device according to the present embodiment has an advantage of increasing the probability that the second light VIS reaches the element located inside the display device.

[0190] Referring to Figure 18 The first optical filter OF1 can be disposed in the first light-transmitting region LT1 in which the first optical element 201 is disposed. Thus, the first light IR among the light traveling in a direction from the inside of the display device toward the outside of the display device can be transmitted. The second light VIS can be blocked. The first light IR can be more selectively transmitted to the outside of the display device compared to the second light VIS. When it is desired that the first light IR reaches an object disposed outside the display device, the display device according to the present embodiment has an advantage of increasing the probability that the first light IR reaches the object located outside the display device.

[0191] The first optical filter OF1 can be disposed in the second light-transmissive region LT2 in which the second optical element 202 is disposed. Accordingly, the first light IR among the light traveling in a direction from the outside of the display apparatus toward the inside of the display apparatus can be transmitted. The second light VIS can be blocked. The first light IR can be more selectively transmitted to the inside of the display apparatus than the second light VIS. When it is desired for the first light IR to reach the element disposed inside the display apparatus, the display apparatus according to the present embodiment has an advantage of increasing the probability of the first light IR reaching the element disposed inside the display apparatus.

[0192] The second optical filter OF2 can be disposed in the third light-transmissive region LT3 in which the third optical element 203 is disposed. Accordingly, the second light VIS among the light traveling in a direction from the outside of the display apparatus toward the inside of the display apparatus can be transmitted. The first light IR can be blocked. The second light VIS can be more selectively transmitted to the inside of the display apparatus than the first light IR. When it is desired for the second light VIS to reach the element disposed inside the display apparatus, the display apparatus according to the present embodiment has an advantage of increasing the probability of the second light VIS reaching the element disposed inside the display apparatus.

[0193] Although the embodiments of the present application have been described in detail with reference to the accompanying drawings, the present application is not necessarily limited to the embodiments and can be variously modified without departing from the technical idea of the present application.

[0194] Accordingly, the embodiments disclosed herein are not intended to limit the technical spirit of the present application, but merely to exemplify and describe it, and the scope of the technical idea of the present application is not limited by these embodiments.

[0195] Accordingly, it should be understood that the above-described embodiments are illustrative in all aspects and are not restrictive.

[0196] The scope of protection of the present application should be explained on the basis of the claims, and all technical ideas within the equivalent scope thereof should be interpreted as being included in the scope of the present application.

Claims

1. A display device, comprising: Display panel; as well as An optical element, located below the display panel, is configured to emit light to the outside of the display device and / or detect light from the outside of the display device. The display panel includes a substrate, an encapsulation layer on the substrate, and an optical filter layer located between the substrate and the encapsulation layer. The optical filter layer filters the emitted light and / or the detected light.

2. The display device according to claim 1, wherein, The display device further includes: A light-emitting element, located between the substrate and the encapsulation layer; and A circuit layer, located between the substrate and the light-emitting element, is configured to drive the light-emitting element. The optical filter layer is located between the substrate and the circuit layer.

3. The display device according to claim 1, wherein, The display device further includes: The light-emitting element is located between the substrate and the encapsulation layer. The light-emitting element includes a light-emitting layer, an anode electrode located between the substrate and the light-emitting layer, and a cathode electrode located between the encapsulation layer and the light-emitting layer. The optical filter layer is located on the light-emitting element.

4. The display device according to claim 1, wherein, The display device further includes: A planarization layer is located between the substrate and the encapsulation layer. The optical filter layer is located on the planarization layer.

5. The display device according to claim 1, wherein, The display device further includes: A color filter layer is located on the encapsulation layer.

6. The display device according to claim 1, wherein, The display device further includes: A touch sensor, located on the encapsulation layer, includes touch sensor electrodes; and A bandpass filter that overlaps with the touch sensor electrodes in the thickness direction of the display panel.

7. The display device according to claim 1, wherein, The display panel includes: The first region includes a first luminescent region, and The second region includes a light-transmitting region and a second light-emitting region. The optical element includes at least one of the following: a first optical element comprising a light source configured to emit a first light; a second optical element comprising a sensor configured to sense the first light; and a third optical element comprising a sensor configured to sense a second light having a wavelength range different from that of the first light; and The optical filter layer includes at least one of the following: a first optical filter configured to transmit the first light; and a second optical filter configured to transmit the second light.

8. The display device according to claim 7, wherein, The optical element includes the first optical element, which overlaps with the first light-emitting area in the thickness direction of the display panel. The first light-emitting area includes a first light-emitting region, which overlaps with the first optical element in the thickness direction of the display panel.

9. The display device according to claim 8, wherein, The optical filter layer includes the first optical filter, which overlaps with the first light-emitting area in the thickness direction of the display panel.

10. The display device according to claim 7, wherein, The optical element includes the first optical element, which overlaps with the second light-emitting area in the thickness direction of the display panel; as well as The second light-emitting area includes a first second light-emitting area, which overlaps with the first optical element in the thickness direction of the display panel.

11. The display device according to claim 10, wherein, The optical filter layer includes the first optical filter, which overlaps with the first second light-emitting area in the thickness direction of the display panel.

12. The display device according to claim 7, wherein, The optical element includes the second optical element, which overlaps with the second light-emitting area in the thickness direction of the display panel. The second light-emitting area includes a second second light-emitting area, which overlaps with the second optical element in the thickness direction of the display panel.

13. The display device according to claim 12, wherein, The optical filter layer includes the first optical filter, which overlaps with the second light-emitting region in the thickness direction of the display panel.

14. The display device according to claim 7, wherein, The optical element includes the third optical element, which overlaps with the second light-emitting area in the thickness direction of the display panel. The second light-emitting region includes a third second light-emitting region, which overlaps with the third optical element in the thickness direction of the display panel.

15. The display device according to claim 14, wherein, The optical filter layer includes a second optical filter, which overlaps with the third second light-emitting region in the thickness direction of the display panel.

16. The display device according to claim 7, wherein, The optical element includes the first optical element, which overlaps with the light-transmitting area in the thickness direction of the display panel; as well as The light-transmitting area includes a first light-transmitting area, which overlaps with the first optical element in the thickness direction of the display panel.

17. The display device according to claim 16, wherein, The optical filter layer includes the first optical filter, which overlaps with the first light-transmitting area in the thickness direction of the display panel.

18. The display device according to claim 7, wherein, The optical element includes the second optical element, which overlaps with the light-transmitting area in the thickness direction of the display panel; as well as The light-transmitting area includes a second light-transmitting area, which overlaps with the second optical element in the thickness direction of the display panel.

19. The display device according to claim 18, wherein, The optical filter layer includes the first optical filter, which overlaps with the second light-transmitting area in the thickness direction of the display panel.

20. The display device according to claim 7, wherein, The optical element includes the third optical element, which overlaps with the light-transmitting area in the thickness direction of the display panel. The light-transmitting area includes a third light-transmitting area, which overlaps with the third optical element in the thickness direction of the display panel.

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