Light emitting display panel and light emitting display device including the same

Abstract

Embodiments of the present disclosure relate to a light emitting display panel and a light emitting display apparatus including the same. Specifically, the light emitting display panel includes first, second, and third light emitting areas spaced apart from each other and emitting different colors of light, and a photochromic layer surrounding each of the first, second, and third light emitting areas and disposed in a non-light emitting area. When the first, second, and third light emitting areas emit light, the photochromic layer is in a transparent state. When light of a wavelength band shorter than visible light is incident on the photochromic layer, the photochromic layer is in an opaque state. Accordingly, a light emitting display panel and a light emitting display apparatus including the same having excellent FOV characteristics can be provided.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2020-0156408, filed on November 20, 2020, which is incorporated herein by reference for all purposes, as if fully set forth herein. Technical Field

[0003] Embodiments of this disclosure relate to a light-emitting display panel and a light-emitting display device including the light-emitting display panel, and more particularly to an organic light-emitting display panel and an organic light-emitting display device including the organic light-emitting display panel. Background Technology

[0004] Display devices are output devices used to present visual information and play a crucial role in the information age. Display devices are evolving to achieve higher performance while becoming thinner, lighter, and more portable. Among flat panel displays that are much lighter and smaller than cathode ray tubes (CRTs), organic light-emitting diode (OLED) devices are gaining popularity; they display images by controlling the amount of light emitted by an emissive layer.

[0005] OLED display devices include polarizing plates, which can be either circular or linear polarizing plates. The polarizing plates enable true black and reduce external light reflection to improve visibility.

[0006] However, OLED display devices using polarizers suffer from increased costs and reduced brightness. Summary of the Invention

[0007] Embodiments of this disclosure relate to a light-emitting display panel having an excellent field of view (FOV) structure and a light-emitting display device including the light-emitting display panel.

[0008] Embodiments of this disclosure relate to a light-emitting display panel having reduced external light reflectivity and excellent color characteristics, and a light-emitting display device including the light-emitting display panel and a non-polarizing plate.

[0009] Embodiments of this disclosure relate to a light-emitting display panel having a structure that prevents color mixing of light emitted from different light-emitting areas even in the absence of a black matrix, and a light-emitting display device including the light-emitting display panel.

[0010] According to embodiments of this disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, comprising: a substrate; a first electrode disposed on the substrate; a dam overlapping a portion of the upper surface of the first electrode; a light-emitting layer disposed on the first electrode; a second electrode disposed on the light-emitting layer; an encapsulation layer disposed on the substrate having the second electrode; and a photochromic layer disposed on the encapsulation layer, the photochromic layer overlapping a portion of the dam. When light of a first wavelength band irradiates the photochromic layer, the photochromic layer is in a transparent state. When light of a second wavelength band irradiates the photochromic layer, the photochromic layer is in an opaque state, the second wavelength band being shorter than the first wavelength band.

[0011] According to embodiments of this disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, comprising: a first light-emitting region, a second light-emitting region, and a third light-emitting region spaced apart from each other and emitting light of different colors; and a photochromic layer, the photochromic layer surrounding each of the first, second, and third light-emitting regions and disposed in a non-light-emitting region. When the first, second, and third light-emitting regions emit light, the photochromic layer is in a transparent state. When light with a wavelength shorter than visible light is incident on the photochromic layer, the photochromic layer is in an opaque state.

[0012] According to embodiments of the present disclosure, a light-emitting display panel having a structure capable of providing excellent FOV characteristics due to the presence of a photochromic layer in a portion of the non-display area, and a light-emitting display device including the light-emitting display panel, can be provided.

[0013] According to embodiments of the present disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, which have a structure that provides reduced external light reflectivity and excellent color characteristics due to the presence of at least two of a color filter, a photochromic layer and a color pattern on the encapsulation layer.

[0014] According to embodiments of the present disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, which have a structure that prevents color mixing of light emitted from different light-emitting areas even in the absence of a black matrix by including a photochromic layer and a color pattern. Attached Figure Description

[0015] The above and other objects, features and advantages of this disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0016] Figure 1This is a schematic diagram illustrating the system configuration of a light-emitting display device according to an embodiment of the present disclosure;

[0017] Figure 2 This is a cross-sectional view schematically illustrating the structure of a sub-pixel region of a light-emitting display panel according to an embodiment of the present disclosure;

[0018] Figure 3 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with a photochromic layer when the luminescent display panel is in the on state.

[0019] Figure 4 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with the photochromic layer when the luminescent display panel is in the off state;

[0020] Figure 5 It is along Figure 3 A cross-sectional view taken from line AB;

[0021] Figure 6 It is along Figure 3 A cross-sectional view of another structure intercepted by line AB;

[0022] Figure 7 It is along Figure 4 A cross-sectional view taken from line CD;

[0023] Figure 8 This is a cross-sectional view illustrating a portion of the structure of an effective area of ​​a light-emitting display panel according to an embodiment of the present disclosure;

[0024] Figure 9 This is a cross-sectional view illustrating an embodiment of a light-emitting display panel according to the present disclosure;

[0025] Figure 10 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with a photochromic layer when the luminescent display panel is in the on state.

[0026] Figure 11 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with the photochromic layer when the luminescent display panel is in the off state;

[0027] Figure 12 It is along Figure 10 A cross-sectional view taken from line EF;

[0028] Figure 13 It is along Figure 11 The cross-sectional view taken by line GH. Detailed Implementation

[0029] In the following description of examples or embodiments of this disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that can be implemented are shown by way of example, and the same reference numerals and symbols may be used in the drawings to refer to the same or similar components, even if they are shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, detailed descriptions will be omitted where it would make the subject matter of some embodiments of this disclosure unclear if a detailed description of known functions and components incorporated herein would be necessary. Terms used herein, such as “comprising,” “having,” “including,” “constituting,” “made of,” and “formed from,” are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” As used herein, singular forms are intended to include plural forms unless the context clearly indicates otherwise.

[0030] The elements of this disclosure may be described herein using terms such as “first,” “second,” “A,” “B,” “(A),” or “(B).” Each of these terms is not used to define the nature, order, sequence, or number of the elements, but is only used to distinguish the corresponding element from the others.

[0031] When referring to the first element and the second element as "connected or combined," "in contact or overlapping," etc., it should be interpreted as meaning that the first element can not only be "directly connected or combined" or "directly contact or overlap" with the second element, but also that a third element can be "inserted" between the first element and the second element, or that the first element and the second element can be "connected or combined," "in contact or overlapping," etc., with each other via a fourth element. Here, the second element may be included in at least one of two or more elements that are "connected or combined," "in contact or overlapping," etc., with each other.

[0032] When using time-relative terms such as “after,” “following,” “next,” “before,” etc., to describe the process or operation of an element or structure; or the flow and steps in a method of operation, processing, or manufacturing, these terms may be used to describe discontinuous or non-sequential processes or operations, unless the terms “directly” or “immediately following” are used together.

[0033] Furthermore, when referring to any scale, relative size, etc., even without a specific description, it should be assumed that the numerical values ​​(e.g., levels, ranges, etc.) of the component or feature or related information include the range of tolerances or errors that can be caused by various factors (e.g., process factors, internal or external shocks, noise, etc.). In addition, the term "may" fully encompasses all the meanings of the term "can".

[0034] Figure 1This is a schematic diagram illustrating the system configuration of a light-emitting display device according to an embodiment of the present disclosure.

[0035] According to embodiments of this disclosure, the light-emitting display device 100 may include a panel PNL for displaying images or outputting light and a driving circuit for driving the panel PNL.

[0036] The panel PNL may include multiple data lines DL, multiple gate lines GL, and multiple sub-pixels SP defined by the multiple data lines DL and the multiple gate lines GL and arranged in a matrix.

[0037] In a panel PNL, multiple data lines DL and multiple gate lines GL can be arranged interleaved. For example, multiple gate lines GL can be arranged in rows or columns, while multiple data lines DL can be arranged in columns or rows. For ease of description, it is assumed below that multiple gate lines GL are arranged in rows and multiple data lines DL are arranged in columns.

[0038] For example, depending on the sub-pixel structure, in addition to multiple data lines (DL) and multiple gate lines (GL), the panel PNL may also have other types of signal lines. The panel PNL may further have drive voltage lines, reference voltage lines, or common voltage lines.

[0039] For example, the types of signal lines disposed on the panel PNL may differ depending on the sub-pixel structure or panel type. In this disclosure, the concept of a signal line may encompass the electrode on which a signal is applied.

[0040] A panel PNL may include a valid area AA for displaying pictures or images and a non-valid area NA surrounding the valid area AA that does not display images. The non-valid area NA is also called the border area.

[0041] The effective area AA includes multiple sub-pixels SP used to display the image.

[0042] The inactive region NA has a pad area for electrical connection with the data driver DDR, and may have multiple data lines connecting the pad area to multiple data lines DL. The multiple data lines may be extensions of the multiple data lines DL to the inactive region NA, or they may be separate patterns electrically connected to the multiple data lines DL.

[0043] The inactive region NA may also include gate drive-related lines to transmit the voltage (signals) required for the gate drive to the gate driver GDR via pads electrically connected to the data driver DDR. For example, gate drive-related lines may include clock lines for transmitting clock signals, gate voltage lines for transmitting gate voltage, and gate drive control signal lines for transmitting various control signals required to generate scan signals. Unlike the gate lines GL located in the active region AA, the gate drive-related lines are located in the inactive region NA.

[0044] The driving circuit may include a data driver DDR for driving multiple data lines DL, a gate driver GDR for driving multiple gate lines GL, and a controller CTR for controlling the data driver DDR and the gate driver GDR.

[0045] The data driver DDR can drive multiple data lines DL by outputting data voltage to multiple data lines DL.

[0046] The gate driver GDR can drive multiple gate lines GL by outputting a scan signal to multiple gate lines GL.

[0047] The controller CTR can control the drive operation of the data driver DDR and the gate driver GDR by providing various control signals DCS and GCS required for the drive operation of the data driver DDR and the gate driver GDR. In addition, the controller CTR can provide image data DATA to the data driver DDR.

[0048] The controller CTR begins scanning according to the timing implemented in each frame, converts input image data from external input into image data DATA in a data signal format suitable for use in the data driver DDR, outputs image data DATA, and controls the data drive at the appropriate time for scanning.

[0049] To control the data driver DDR and the gate driver GDR, the controller CTR receives timing signals such as vertical synchronization signals, horizontal synchronization signals, input data enable signals, or clock signals from external sources (e.g., the host system), generates various control signals, and outputs these control signals to the data driver DDR and the gate driver GDR.

[0050] As an example, in order to control the gate driver GDR, the controller CTR outputs various gate control signals GCS, including the gate start pulse, the gate shift clock, and the gate output enable signal.

[0051] To control the data driver DDR, the controller CTR outputs various data control signals DCS, such as the source start pulse, source sampling clock, and source output enable signal.

[0052] The controller CTR can be a timing controller used in general display technology, or it can be a control device that can perform other control functions in addition to performing the functions of a timing controller.

[0053] The controller CTR can be implemented as a separate component from the data driver DDR, or the controller CTR can be implemented as an integrated circuit together with the data driver DDR.

[0054] The data driver DDR receives image data DATA from the controller CTR and supplies data voltage to multiple data lines DL, thereby driving the multiple data lines DL. Here, the data driver DDR is also referred to as the source driver.

[0055] The data driver DDR can exchange various signals with the controller CTR via various interfaces.

[0056] The gate driver GDR sequentially drives multiple gate lines GL by sequentially providing scan signals to them. Here, the gate driver GDR is also referred to as a scan driver.

[0057] Under the control of the controller CTR, the gate driver GDR sequentially provides scan signals of turn-on or turn-off voltages to multiple gate lines GL.

[0058] When the gate driver GDR turns on a specific gate line, the data driver DDR converts the image data DATA received from the controller CTR into an analog data voltage and provides the analog data voltage to multiple data lines DL.

[0059] The data driver DDR may be located on only one side of the panel PNL (e.g., the top or bottom side), and in some cases, depending on the drive scheme or panel design, the data driver DDR may be located on each of the two opposite sides of the panel PNL (e.g., both the top and bottom sides).

[0060] The gate driver GDR may be located on only one side of the panel PNL (e.g., the left or right side), and in some cases, depending on the driving scheme or panel design, the gate driver GDR may be located on each of the two opposite sides of the panel PNL (e.g., both the left and right sides).

[0061] The data driver DDR may include one or more source driver integrated circuits (SDICs).

[0062] Each source driver integrated circuit (SDIC) may include a shift register, latch circuitry, a digital-to-analog converter (DAC), and an output buffer. In some cases, the data driver DDR may further include one or more analog-to-digital converters (ADCs).

[0063] Each source driver integrated circuit (SDIC) can be connected to the bonding pads of the panel PNL in a tape-on-board (TAB) or chip-on-glass (COG) manner, or it can be directly mounted on the panel PNL. In some cases, each source driver integrated circuit (SDIC) can be integrated and mounted on the panel PNL. Each source driver integrated circuit (SDIC) can be implemented as a chip-on-film (COF) type. In this case, each source driver integrated circuit (SDIC) can be mounted on the circuit film and electrically connected to the data line DL of the panel PNL through the circuit film.

[0064] A gate driver (GDR) may include multiple gate drive circuits (GDCs). Each of the multiple gate drive circuits (GDCs) may correspond to a multiple gate line (GL).

[0065] Each gate drive circuit (GDC) may include, for example, a shift register and a level shifter.

[0066] Each gate drive circuit (GDC) can be connected to the bonding pads of the panel PNL in either a tape-on-board (TAB) or chip-on-glass (COG) configuration. Each GDC can also be implemented as a chip-on-film (COF) solution. In this case, each GDC can be mounted on a circuit film and electrically connected to the gate line GL of the panel PNL via the circuit film. Alternatively, each GDC can be implemented as a gate-in-panel (GIP) type and integrated into the panel PNL. In other words, each GDC can be formed directly on the panel PNL.

[0067] Figure 2 This is a cross-sectional view schematically illustrating the structure of a sub-pixel region of a light-emitting display panel according to an embodiment of the present disclosure.

[0068] Reference Figure 2 According to embodiments of this disclosure, the light-emitting display panel may include at least one thin-film transistor disposed on a substrate 201 and a light-emitting element 210 disposed on the thin-film transistor. Here, the light-emitting element 210 may be an organic light-emitting element, and the light-emitting display panel may be an organic light-emitting display panel. However, this disclosure is not limited thereto, and the light-emitting element 210 may also be an inorganic light-emitting element.

[0069] A thin-film transistor may include an active layer 203, a gate electrode 205, a source electrode 207, and a drain electrode 208.

[0070] The light-emitting element 210 may include a first electrode 211, a light-emitting layer 212, and a second electrode 213.

[0071] Specifically, a buffer layer 202 may be provided on the substrate 201.

[0072] The buffer layer 202 may include inorganic insulating materials such as silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiON), but this disclosure is not limited thereto.

[0073] exist Figure 2 In the present invention, the buffer layer 202 has a single-layer structure, but the buffer layer 202 may have a multi-layer structure.

[0074] When the buffer layer 202 has a multilayer structure, layers of at least two inorganic insulating materials, such as silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiON), may be alternately provided, but this disclosure is not limited thereto.

[0075] In the following description, for convenience, buffer layer 202 is described as a single-layer structure.

[0076] The active layer 203 of the thin-film transistor can be disposed on the buffer layer 202.

[0077] The active layer 203 can be any type of semiconductor layer. For example, the active layer 203 can be selected from oxide semiconductors, amorphous silicon semiconductors and polycrystalline silicon semiconductors, but this disclosure is not limited thereto.

[0078] A gate insulating film 204 can be disposed on the active layer 203.

[0079] The gate insulating film 204 may include inorganic insulating materials such as silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiON), but this disclosure is not limited thereto.

[0080] although Figure 2 The diagram shows a structure in which a gate insulating film 204 is disposed on a portion of the upper surface of the active layer 203, but the present disclosure is not limited thereto, and the gate insulating film 204 is disposed to cover the active layer 203.

[0081] The gate electrode 205 of the thin-film transistor can be disposed on the gate insulating film 204.

[0082] The gate electrode 205 may include any one of metals such as aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), and titanium (Ti) or alloys thereof, but this disclosure is not limited thereto.

[0083] An interlayer insulating film 206 can be disposed on the gate electrode 205.

[0084] The interlayer insulating film 206 may include inorganic insulating materials such as silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiON), but this disclosure is not limited thereto.

[0085] The source electrode 207 and drain electrode 208 of the thin film transistor can be disposed on the interlayer insulating layer 206, and the source electrode 207 and drain electrode 208 can be spaced apart from each other.

[0086] Alternatively, in embodiments of this disclosure, 207 may be a drain electrode and 208 may be a source electrode.

[0087] The source electrode 207 and the drain electrode 208 may include any one of metals such as aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), and titanium (Ti) or alloys thereof, but this disclosure is not limited thereto.

[0088] Each of the source electrode 207 and the drain electrode 208 can be connected to a portion of the upper surface of the active layer 203 through a contact hole provided in the interlayer insulating layer 206.

[0089] A planarization layer 209 may be provided on a substrate 201 on which a source electrode 207 and a drain electrode 208 are disposed.

[0090] Although not shown in the accompanying drawings, a protective film comprising an inorganic insulating material may be further disposed below the planarization layer 209.

[0091] The first electrode 211 of the light-emitting element 210 can be disposed on a portion of the upper surface of the planarization layer 209.

[0092] The first electrode 211 can be electrically connected to the drain electrode 208 of the thin-film transistor through a contact hole disposed in the planarization layer 209. Although Figure 2 The diagram shows a structure in which the first electrode 211 is connected to the drain electrode 208 of the thin-film transistor, but the present disclosure is not limited thereto. The first electrode 211 may be connected to the source electrode 207 of the thin-film transistor.

[0093] although Figure 2 The first electrode 211 is shown to be a single-layer structure, but this disclosure is not limited thereto. For example, the first electrode 211 may have a multilayer structure with two or more layers.

[0094] The first electrode 211 may include a reflective electrode.

[0095] Specifically, when the first electrode 211 has a single-layer structure, the first electrode 211 can be a reflective electrode including a reflective conductive material.

[0096] When the first electrode 211 has a multilayer structure, at least one layer may be a reflective electrode comprising a reflective conductive material. The other layers besides the reflective electrode may be layers formed of a transparent conductive material.

[0097] A dike 220 can be set on the flattening layer 209.

[0098] The embankment 220 may be configured to overlap a portion of the upper surface of the first electrode 211. The embankment 220 may be configured to expose a portion of the upper surface of the first electrode 211.

[0099] The dam 220 can define a light-emitting area EA and a non-light-emitting area NEA within the effective area AA of the light-emitting display device 100. For example, within the effective area AA, the area where the dam 220 is provided can be the non-light-emitting area NEA, and the area where the dam 220 is not provided can be the light-emitting area EA.

[0100] A light-emitting layer 212 of the light-emitting element 210 can be disposed on the first electrode 211.

[0101] The light-emitting layer 212 may be disposed on the upper surface of the first electrode 211 exposed by the embankment 220.

[0102] although Figure 2 The light-emitting layer 212 is shown to be a single-layer structure, but the present disclosure is not limited thereto. The light-emitting layer 212 may be formed from multiple organic layers.

[0103] The light-emitting layer 212 may emit light of at least one color selected from red (R), green (G), and blue (B). However, this disclosure is not limited thereto, and the light-emitting layer 212 may emit other colors, such as white (W).

[0104] The second electrode 213 of the light-emitting element 210 can be disposed on the substrate 201 on which the light-emitting layer 212 is disposed.

[0105] The second electrode 213 may include a transparent conductive material or a semi-transparent material.

[0106] although Figure 2 The second electrode 213 is shown to be a single-layer structure, but the present disclosure is not limited thereto; the second electrode 213 may have a multilayer structure with two or more layers.

[0107] An encapsulation layer 230 may be provided on the second electrode 213.

[0108] The encapsulation layer 230 may include: a first encapsulation layer 231 disposed on the second electrode 213, a second encapsulation layer 232 disposed on the first encapsulation layer 231, and a third encapsulation layer 233 disposed on the second encapsulation layer 232. The first encapsulation layer 231 and the third encapsulation layer 233 may include inorganic insulating materials, and the second encapsulation layer 232 may include organic insulating materials.

[0109] The first encapsulation layer 231 and the third encapsulation layer 233, which include inorganic insulating materials, can be used to prevent the penetration of moisture and oxygen, and the second encapsulation layer 232, which includes organic insulating materials, can be used to delay the movement of small amounts of moisture and oxygen that have penetrated through the third encapsulation layer 233.

[0110] Although not shown in the accompanying drawings, the encapsulation layer 230 can be disposed not only in the effective area AA of the light-emitting display panel, but also in the ineffective area NA of the light-emitting display panel.

[0111] At least one insulating layer 240 may be provided on the encapsulation layer 230.

[0112] A photochromic layer 260 may be disposed on the insulating layer 240. Furthermore, a color filter 250 may be further disposed on the insulating layer 240. The insulating layer 240 may be omitted or replaced, or other layers may be added, as needed. In other words, the color filter 250 and the photochromic layer 260 may be disposed on the encapsulation layer 230.

[0113] The color filter 250 can be set in the area corresponding to the light-emitting area EA.

[0114] Color filter 250 can be configured to overlap with a portion of the non-luminous area NEA and the luminous area EA to ensure process margin. In other words, in a plan view, the area of ​​color filter 250 can be designed to be larger than the area of ​​the luminous area EA.

[0115] The color filter 250 may be selected from a red (R) color filter, a green (G) color filter and a blue (B) color filter, but this disclosure is not limited thereto.

[0116] The color filter 250 can improve the color characteristics of the light emitted from the light-emitting element 210.

[0117] Furthermore, the color filter 250 can reduce the external light L5 of the polarizer-free light-emitting display panel of this disclosure (see...). Figure 7 ( ) increases reflectivity, improving visibility.

[0118] At least one side surface of the color filter 250 may be in contact with the photochromic layer 260.

[0119] The photochromic layer 260 may include a first photochromic layer 261 disposed on the encapsulation layer 230 and a second photochromic layer 262 disposed on the first photochromic layer 261.

[0120] The photochromic layer 260 can change color depending on the wavelength of the light incident on it. For example, depending on the wavelength of the light incident on it, the photochromic layer 260 can become transparent or opaque with a specific color.

[0121] Depending on the state of the photochromic layer 260, the field of view (FOV) characteristics of the light-emitting display device 100 will be affected.

[0122] This will be described in detail below.

[0123] Figure 3 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with a photochromic layer when the luminescent display panel is in the on state. Figure 4 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with the photochromic layer when the luminescent display panel is in the off state.

[0124] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0125] Reference Figure 3 The effective area of ​​the light-emitting display panel may include multiple light-emitting areas EA1, EA2 and EA3; and a non-light-emitting area NEA surrounding the multiple light-emitting areas EA1, EA2 and EA3.

[0126] although Figure 3 The diagram shows a structure in which the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 have the same area; however, this disclosure is not limited thereto. For example, depending on the lifetime or light-emitting characteristics of the light-emitting layer (or light-emitting element) disposed in each light-emitting region, at least two of the first to third light-emitting regions EA1, EA2, and EA3 may have different areas.

[0127] like Figure 3 As shown, the first to third luminescent regions EA1, EA2, and EA3 can be octagonal in the plan view. However, this disclosure is not limited thereto; the first to third luminescent regions EA1, EA2, and EA3 can be circular, elliptical, or polygonal in the plan view, or can be formed in a combination of these shapes.

[0128] At least two of the first to third luminescent regions EA1, EA2, and EA3 may be arranged in different rows or columns. However, this disclosure is not limited thereto, and the first to third luminescent regions EA1, EA2, and EA3 may be arranged in the same row or column.

[0129] When the light-emitting display panel is in the on state, light can be emitted from the first to third light-emitting areas EA1, EA2 and EA3 of the light-emitting display panel.

[0130] The light emitted from the first to third light-emitting regions EA1, EA2, and EA3 is light emitted from the light-emitting element, and the light emitted from the light-emitting element can reach not only the first to third light-emitting regions EA1, EA2, and EA3, but also the photochromic layer 260 located in the non-light-emitting region NEA.

[0131] When light emitted from the light-emitting element reaches the photochromic layer 260, the photochromic layer 260 can become transparent.

[0132] Furthermore, when the light-emitting display panel is in the on state, even if external light shines on the photochromic layer 260 from the outside of the light-emitting display panel, the photochromic layer 260 can still become transparent due to the influence of the light irradiated from the first to the third light-emitting regions EA1, EA2, and EA3.

[0133] Therefore, when the light-emitting display panel is in the on state, the FOV characteristics of the panel can be improved. In particular, when the light-emitting display device 100 is an electronic device that is frequently used outdoors, such as a mobile device or an IT device, it can prevent the visibility of the light-emitting display device 100 from being reduced due to the reflection of external light.

[0134] like Figure 4 As shown, when the light-emitting display panel is in the off state, the first to third light-emitting areas EA1, EA2 and EA3 of the light-emitting display panel may not emit light.

[0135] In this state, when external light is incident on the photochromic layer 260 disposed in the non-light-emitting area NEA of the light-emitting display panel, the photochromic layer 260 can become opaque (e.g., black).

[0136] The FOV characteristics of the photochromic layer 260 in its transparent and opaque states, based on embodiments of the present disclosure, are described below.

[0137] Figure 5 It is along Figure 3 The cross-sectional view taken by line AB. Figure 6 It is along Figure 3 A cross-sectional view of another structure taken by line AB. Figure 7 It is along Figure 4 A cross-sectional view taken from line CD.

[0138] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0139] Reference Figure 5 and Figure 6 According to embodiments of the present disclosure, the light-emitting display panel may include a plurality of light-emitting regions EA1, EA2 and EA3 disposed in the effective area.

[0140] For example, according to embodiments of the present disclosure, the light-emitting display panel may include a first light-emitting region EA1, a second light-emitting region EA2, and a third light-emitting region EA3 that emit light of different colors. The first light-emitting region EA1 may be an area that emits red (R) light, the second light-emitting region EA2 may be an area that emits green (G) light, and the third light-emitting region EA3 may be an area that emits blue (B) light, but the present disclosure is not limited thereto.

[0141] In this configuration, the first light-emitting layer 212a of the light-emitting element 210 disposed in the first light-emitting region EA1, the second light-emitting layer 212b of the light-emitting element 210 disposed in the second light-emitting region EA2, and the third light-emitting layer 212c of the light-emitting element 210 disposed in the third light-emitting region EA3 can emit light of different colors. The first light-emitting layer 212a can emit red (R) light, the second light-emitting layer 212b can emit green (G) light, and the third light-emitting layer 212c can emit blue (B) light. However, this disclosure is not limited thereto.

[0142] Multiple light-emitting regions EA1, EA2 and EA3 can correspond to the regions in the effective region where the first electrode 211 is disposed that do not overlap with the embankment 220.

[0143] The embankment 220 of the light-emitting display panel according to embodiments of the present disclosure may be formed of an opaque organic material. For example, the embankment 220 may be formed of a black organic material, but the present disclosure is not limited thereto.

[0144] Multiple luminescent regions EA1, EA2, and EA3 may have a structure surrounded by a non-luminescent region NEA. The non-luminescent region NEA may be a region within the effective area corresponding to the area where the embankment 220 is set.

[0145] although Figure 5 and Figure 6 The diagram shows a structure in which a first electrode 211 and a dam 220 are disposed on a substrate 201, but the structure of the light-emitting display panel of this disclosure is not limited thereto. For example, as Figure 2 As shown, a thin-film transistor electrically connected to the first electrode 211 may be further disposed on the substrate 201.

[0146] An encapsulation layer 230 can be provided on the light-emitting element 210 to protect the light-emitting element 210 from foreign matter such as moisture and oxygen.

[0147] An insulating layer 240 may be provided on the encapsulation layer 230.

[0148] although Figure 5 The insulating layer 240 is shown to be a single-layer structure, but the present disclosure is not limited thereto.

[0149] For example, such as Figure 6 As shown, the insulating layer 240 disposed on the encapsulation layer 230 may have a multilayer structure.

[0150] like Figure 6 As shown, a first insulating layer 441 may be provided on the third encapsulation layer 233, a second insulating layer 442 may be provided on the first insulating layer 441, and a third insulating layer 443 may be provided on the second insulating layer 442. However, this is only an example, and at least two insulating layers 240 may be provided on the encapsulation layer 230.

[0151] like Figure 5 and Figure 6 As shown, a photochromic layer 260 may be provided on the encapsulation layer 230. Furthermore, preferably, a plurality of color filters 250 may be further provided on the encapsulation layer 230.

[0152] Multiple color filters 250 may include a first color filter 351, a second color filter 352, and a third color filter 353 with different colors. For example, the first color filter 351 may be a red (R) color filter, the second color filter 352 may be a green (G) color filter, and the third color filter 353 may be a blue (B) color filter, but this disclosure is not limited thereto.

[0153] Considering process margins, a color filter corresponding to a light-emitting area can overlap with that light-emitting area, and can also overlap with a portion of the non-light-emitting area (NEA) surrounding that light-emitting area. In other words, as... Figure 2 As shown, each of the first color filter 351, the second color filter 352, and the third color filter 353 may overlap with the region in which the first electrode 211 and the embankment 220 overlap with each other.

[0154] However, this disclosure is not limited thereto. For example, such as Figure 5 As shown, the first color filter 351, the second color filter 352 and the third color filter 353 can be respectively configured to correspond to the first light-emitting area EA1, the second light-emitting area EA2 and the third light-emitting area EA3, but they can be separate from the non-light-emitting area NEA.

[0155] According to existing technology, light-emitting display panels typically use polarizers to reduce external light L5 (see...). Figure 7 The reflection of light is a key factor in the light emission of a display panel. However, the use of polarizing plates increases manufacturing costs, and due to their low transmittance, they reduce the brightness of the light-emitting display panel, resulting in a deterioration in display quality.

[0156] According to embodiments of this disclosure, the light-emitting display panel does not include such a polarizing plate and has a plurality of color filters 250 on the encapsulation layer 230, thereby increasing brightness while reducing external light reflection compared to when a polarizing plate is used.

[0157] Furthermore, the light-emitting display panel according to embodiments of this disclosure includes an opaque embankment 220. The embankment 220 absorbs light reflected by a plurality of wirings and electrodes disposed in the panel, thereby preventing an increase in reflectivity due to the wirings and electrodes.

[0158] Furthermore, since the multiple color filters 250 have a higher transmittance than the polarizing plate, the light-emitting display panel according to the embodiments of this disclosure can have high brightness characteristics.

[0159] Furthermore, as described above, the plurality of color filters 250 includes first to third color filters 351, 352, and 353, and the first to third color filters 351, 352, and 353 are configured to correspond to light-emitting regions EA1, EA2, and EA3 that respectively emit light of colors corresponding to the colors of the first to third color filters 351, 352, and 353. Therefore, through the first to third color filters 351, 352, and 353, more vivid (crisp) colors of light can be seen.

[0160] A conventional light-emitting display panel may include a black matrix disposed in an area overlapping with a non-light-emitting area. The black matrix may be disposed between adjacent sub-pixels (e.g., between red and green sub-pixels, between green and blue sub-pixels, or between blue and red sub-pixels).

[0161] The screen appears clear when viewed from the front. Viewing the light-emitting display panel from the front means viewing it from a direction perpendicular to the surface of the substrate 201.

[0162] However, when a user views the light-emitting display panel from the side, the light emitted from the multiple light-emitting areas EA1, EA2, and EA3 can be absorbed by the black matrix, resulting in a decrease in image brightness compared to viewing the light-emitting display panel from the front. Viewing the light-emitting display panel from the side refers to viewing the panel from an angle other than the angle between the surface of substrate 201 and any straight line perpendicular to the surface of substrate 201, and the angle between the surface of substrate 201 and any straight line parallel to the surface of substrate 201.

[0163] As a specific example, such as Figure 5 As shown, even when a user views the light-emitting display panel from the front or the side, some of the light beams L1 and L2 from the multiple light-emitting areas EA1, EA2, and EA3 are visible. Here, L1 and L2 can be light beams emitted from the same position on the light-emitting layer 212.

[0164] Even if light beams L3 and L4 are emitted from the same position on the light-emitting layer 212, some beams L4 are visible when the user views the light-emitting display panel from the front, but are invisible when viewed from the side. In a typical conventional light-emitting display panel, beam L4 is absorbed by the black matrix and therefore is not transmitted to the user.

[0165] Therefore, when viewing a light-emitting display panel from the side, users can perceive a decrease in brightness compared to viewing it from the front.

[0166] However, in the light-emitting display panel according to the embodiments of the present disclosure, even when the light-emitting display panel is viewed from the side, the same brightness can be provided by the photochromic layer 260 that surrounds the color filter 250 from the side as when the light-emitting display panel is viewed from the front.

[0167] The photochromic layer 260 may include a first photochromic layer 261 disposed on the encapsulation layer 230 and a second photochromic layer 262 disposed on the first photochromic layer 261.

[0168] Each of the plurality of color filters 250 may be laterally surrounded by a photochromic layer 260. At least a first side surface of each photochromic layer 260 may contact the side surface of one of the color filters 351, 352 and 353. A second side surface of each photochromic layer 260 (e.g., the surface opposite the first side surface) may contact the side surface of one of the other color filters.

[0169] The photochromic layer 260 can overlap with the non-luminescent region NEA in the effective region.

[0170] When light of the first wavelength band shines on the first photochromic layer 261 and the second photochromic layer 262 of the photochromic layer 260, the first photochromic layer 261 and the second photochromic layer 262 can be in a transparent state.

[0171] The first band can be in the range greater than 380nm and less than 760nm. In other words, the first band can be the visible light band.

[0172] When an electric field is applied to the light-emitting element 210 having a first electrode 211 including a reflective electrode (i.e., when the light-emitting display panel is in the on state), the light emitted from the light-emitting element 210 can be directed to the color filter 250 and the photochromic layer 260.

[0173] The first to third color filters 351, 352 and 353 can transmit light emitted from the light-emitting element 210 at wavelengths corresponding to the respective colors of the color filters 351, 352 and 353.

[0174] Light emitted from the light-emitting element 210 and reaching the first photochromic layer 261 and the second photochromic layer 262 can make the first photochromic layer 261 and the second photochromic layer 262 transparent.

[0175] Specifically, the light emitted from the light-emitting element 210 according to the embodiments of the present disclosure may include light in the visible light band (a band in the range of greater than 380 nm and less than 760 nm), so that when the light emitted from the light-emitting element 210 reaches the first photochromic layer 261 and the second photochromic layer 262, the first photochromic layer 261 and the second photochromic layer 262 may become transparent.

[0176] Therefore, even when a user views the luminescent display panel from the side, they can see that it has the appearance of... Figure 5 The path of beam L4 shown in the diagram allows for an increased field of view (FOV). In other words, the same amount of light is visible when viewing the luminous display panel from the side as when viewing it from the front, ensuring the same brightness level regardless of whether the view is from the front or the side.

[0177] When the light-emitting element 210 included in the light-emitting display panel does not emit light (i.e., when the light-emitting display panel is in the off state), the photochromic layer 260 can become opaque.

[0178] The following reference Figure 7 This will be described.

[0179] Figure 7 This is an illustration of a portion of the effective area when the light-emitting display panel is in a closed state, according to an embodiment of the present disclosure.

[0180] Constructions and effects that are essentially the same as those described above will not be repeated below.

[0181] Reference Figure 7 When the light-emitting display panel according to the embodiments of the present disclosure is in a closed state, each of the first photochromic layer 261 and the second photochromic layer 262 may be in an opaque state. In this case, light of the second wavelength band illuminates the first photochromic layer 261 and the second photochromic layer 262.

[0182] Specifically, when light of a second wavelength shorter than the first wavelength illuminates the first photochromic layer 261 and the second photochromic layer 262 instead of the first wavelength light, the first photochromic layer 261 and the second photochromic layer 262 can remain opaque.

[0183] The second band can be in the range of 100nm to 380nm. In other words, the second band can be the ultraviolet band.

[0184] For example, when the light-emitting display panel is in the off state (no electric field is applied to the light-emitting element 210) and external light L5 is incident on the light-emitting display panel, the first photochromic layer 261 and the second photochromic layer 262 can remain opaque.

[0185] Specifically, since the external light L5 is light that includes the ultraviolet band (e.g., the band in the range of 100nm and below 380nm), if the external light L5 reaches the first photochromic layer 261 and the second photochromic layer 262 when the light-emitting display panel is in the off state, the first photochromic layer 261 and the second photochromic layer 262 can become opaque.

[0186] When the first photochromic layer 261 and the second photochromic layer 262 are opaque, the colors of the first photochromic layer 261 and the second photochromic layer 262 can be different from each other. The colors of the first photochromic layer 261 and the second photochromic layer 262 can be selected from red (R), green (G), and blue (B).

[0187] For example, when the photochromic layer 260 is opaque and the first photochromic layer 261 is red (R), the second photochromic layer 262 can be blue (B) or green (G). Similarly, when the photochromic layer 260 is opaque and the first photochromic layer 261 is green (G), the second photochromic layer 262 can be red (R) or blue (B).

[0188] The photochromic layer 260, in which the first photochromic layer 261 and the second photochromic layer 263 are stacked on top of each other, can achieve black.

[0189] In other words, when external light L5 is incident on the black photochromic layer 260, the reflectivity of the external light can be reduced due to the light-blocking properties of the photochromic layer 260.

[0190] In other words, according to embodiments of this disclosure, when light corresponding to the visible light band (e.g., light emitted from the light-emitting element) irradiates the first photochromic layer 261 and the second photochromic layer 262, each of the first photochromic layer 261 and the second photochromic layer 262 can become transparent. When the light-emitting display panel switches from an on state to an off state, and external light L5 irradiates the first photochromic layer 261 and the second photochromic layer 262, the first photochromic layer 261 and the second photochromic layer 262 can become different colors. When the light-emitting display panel is on, because the visible light inside the light-emitting display panel has a higher intensity than ultraviolet light, the first photochromic layer 261 and the second photochromic layer 262 can be in a transparent state. However, when the light-emitting display panel is off, because ultraviolet light has a higher intensity, the first photochromic layer 261 and the second photochromic layer 262 can be in an opaque state.

[0191] The first photochromic layer 261 and the second photochromic layer 262 may be formed from any one selected from thiopheneperfluoropentene, benzothiopheneperfluoropentene, benzothiophenecyanoethene, benzothiophenemaleicanhydride, and benzothiophenesulfoneperfluoropetene.

[0192] For example, when the first photochromic layer 261 is formed from any one selected from thiophene perfluoropentene, benzothiophene perfluoropentene, and benzothiophene cyanoethylene, the second photochromic layer 262 may be formed from any one selected from benzothiophene maleic anhydride and benzothiophene sulfone perfluoropentene. However, this is merely an example, and the embodiments of this disclosure are not limited thereto. For example, the first photochromic layer 261 and the second photochromic layer 262 may be formed from any material that can be changed to different colors.

[0193] Thiophene perfluoropentene, benzothiophene perfluoropentene, and benzothiophene cyanoethylene can be materials that turn red (R) when irradiated with ultraviolet light, benzothiophene maleic anhydride can be materials that turn blue (B) when irradiated with ultraviolet light, and benzothiophene sulfone perfluoropentene can be materials that turn green (G) when irradiated with ultraviolet light.

[0194] In the light-emitting display panel according to embodiments of the present disclosure, the color filter and the photochromic layer may have various structures to improve color coordinate characteristics.

[0195] This will be described in detail below.

[0196] Figure 8 This is a cross-sectional view illustrating a portion of the structure of an effective area of ​​a light-emitting display panel according to an embodiment of the present disclosure.

[0197] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0198] exist Figure 8 In this structure, the light-emitting element 210 and the embankment 220 are disposed on the substrate 201, which can be combined with... Figure 2 The structures are the same.

[0199] Reference Figure 8 According to embodiments of the present disclosure, the light-emitting display panel may include a color filter 850 and a photochromic layer 260 disposed on the encapsulation layer 230.

[0200] Color filter 850 may include multiple color filters with different colors. For example, such as Figure 8 As shown, the color filter 850 may include a first color filter 851, a second color filter 852, and a third color filter 853 that present different colors.

[0201] At least two of the first to third color filters 851, 852 and 853 may have different heights.

[0202] The first color filter 851, the second color filter 852, and the third color filter 853 may each have a first height H1, a second height H2, and a third height H3, respectively. For example, the second height H2 may be greater than the first height H1 and the third height H3, and the third height H3 may be greater than the first height H1.

[0203] The first to third heights H1, H2 and H3 can refer to the shortest length from bottom to top of each corresponding color filter.

[0204] As described above, by making at least two of the first to third color filters 851, 852 and 853 have different heights, the luminous display panel can be adjusted to its target color coordinates.

[0205] The height of at least one of the first to third color filters 851, 852 and 853 can correspond to the sum of the height H4 of the first photochromic layer 261 and the height H5 of the second photochromic layer 262.

[0206] For example, such as Figure 8As shown, the sum of the height H4 of the first photochromic layer 261 and the height H5 of the second photochromic layer 262 corresponds to the height of the first color filter 851, i.e., the first height H1. The height of at least one of the first to third color filters 851, 852, and 853 may be greater than the sum of the height H4 of the first photochromic layer 261 and the height H5 of the second photochromic layer 262. For example, the sum of the height H4 of the first photochromic layer 261 and the height H5 of the second photochromic layer 262 may be less than the second height H2 and the third height H3 of the second color filter 852 and the third color filter 853, respectively.

[0207] The heights H4 and H5 of the first and second photochromic layers 261 can refer to the shortest length from bottom to top of each corresponding photochromic layer.

[0208] When the light-emitting display panel according to the embodiments of this disclosure is in the on state, even when the light-emitting display panel is viewed from the side, the light emitted from the light-emitting element 210 can be transmitted through the first photochromic layer 261 and the second photochromic layer 262 and perceived by the user's vision. Therefore, even when the user views the light-emitting display panel from the side, a clear image can be delivered to the user within a wider field of view (FOV).

[0209] Although the above has been combined Figures 3 to 8 The structure of the light-emitting display panel, including first to third light-emitting regions EA1, EA2 and EA3, is described, but the present disclosure is not limited thereto.

[0210] For example, a light-emitting display panel according to an embodiment of the present disclosure may further include at least one light-emitting region that emits light of a different color than the first to third light-emitting regions EA1, EA2 and EA3.

[0211] The following reference Figure 9 This will be described.

[0212] Figure 9 This is a cross-sectional view illustrating an embodiment of a light-emitting display panel according to the present disclosure.

[0213] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0214] Reference Figure 9 According to embodiments of the present disclosure, the light-emitting display panel may include a first light-emitting region EA1, a second light-emitting region EA2, a third light-emitting region EA3, and a fourth light-emitting region EA4 that emit light of different colors.

[0215] In this case, such as Figure 9As shown, the light-emitting layer 912 of the light-emitting element 910 can be configured to overlap with the first electrode 211 and the embankment 220. For example, the light-emitting layer 912 of the light-emitting element 910 can be disposed on the entire surface of the substrate 201 in the effective region, but the structure of the light-emitting layer 912 according to the embodiments of this disclosure is not limited thereto. Figure 2 , Figures 5 to 8 As shown, the light-emitting layer 212 of the light-emitting element 210 may be disposed only on the upper surface of the first electrode 211 exposed by the embankment 220.

[0216] In this case, the first emitting region EA1 can be a region that emits red (R) light, the second emitting region EA2 can be a region that emits green (G) light, the third emitting region EA3 can be a region that emits blue (B) light, and the fourth emitting region EA4 can be a region that emits white (W) light.

[0217] A first color filter 351 can be provided on the encapsulation layer 230 in the first light-emitting region EA1, a second color filter 352 can be provided on the encapsulation layer 230 in the second light-emitting region EA2, a third color filter 353 can be provided on the encapsulation layer 230 in the third light-emitting region EA3, and a fourth color filter 954 can be provided on the encapsulation layer 230 in the fourth light-emitting region EA4.

[0218] The first color filter 351 can be a red (R) color filter, the second color filter 352 can be a green (G) color filter, and the third color filter 353 can be a blue (B) color filter. The fourth color filter 954 can have the same color as any one of the first to third color filters 351, 352, and 353, or it can have a different color than the first to third color filters 351, 352, and 353 (e.g., sky blue).

[0219] To improve the color characteristics of the fourth luminous region EA4, the height H6 of the fourth color filter 954 can be less than the height of each of the first to third color filters 351, 352 and 353.

[0220] The height H6 of the fourth color filter 954 can be less than the sum of the height H4 of the first photochromic layer 261 and the height H5 of the second photochromic layer 262. Therefore, a step can exist at the boundary between the fourth color filter 954 and the photochromic layer 260.

[0221] Although not in Figure 9 As shown, however, another planarization layer can be further provided on the color filter 950 and the photochromic layer 260.

[0222] Furthermore, the light-emitting display panel according to embodiments of this disclosure may include a structure capable of preventing the mixing of different colors of light during driving.

[0223] Figure 10 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with a photochromic layer when the luminescent display panel is in the on state.

[0224] Figure 11 This is a schematic diagram illustrating, according to an embodiment of the present disclosure, the luminescent area, the non-luminescent area, and the area provided with the photochromic layer when the luminescent display panel is in the off state.

[0225] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0226] Reference Figure 10 The effective area of ​​the light-emitting display panel may include multiple light-emitting areas EA1, EA2 and EA3 and a non-light-emitting area NEA surrounding the multiple light-emitting areas EA1, EA2 and EA3.

[0227] Multiple light-emitting regions EA1, EA2 and EA3 may include a first light-emitting region EA1, a second light-emitting region EA2 and a third light-emitting region EA3.

[0228] A first region A1 can be set between the first light-emitting region EA1 and the non-light-emitting region NEA, a second region A2 can be set between the second light-emitting region EA2 and the non-light-emitting region NEA, and a third region A3 can be set between the third light-emitting region EA3 and the non-light-emitting region NEA.

[0229] The first to third regions, A1, A2 and A3, can be areas where photochromic layers are set.

[0230] Color patterns can be set in the remaining non-luminous areas (NEA) where no photochromic layer is set, thereby preventing color mixing between luminous areas when the luminous display panel is driven.

[0231] In other words, when the light-emitting display panel is in the on state, the light emitted from the light-emitting element can reach not only the light-emitting area but also the non-light-emitting area (NEA). Therefore, in the light-emitting area, light from the light-emitting element can be emitted to the outside of the light-emitting display panel.

[0232] When light emitted from the light-emitting element reaches the photochromic layer disposed in the non-light-emitting area NEA, the photochromic layer becomes transparent. Therefore, a user viewing the panel from the side can visually perceive not only the light transmitted through the light-emitting area, but also the light transmitted through the areas where the photochromic layer is disposed (e.g., the first to third areas).

[0233] Furthermore, the light emitted from the light-emitting element can be absorbed by the color pattern in the non-light-emitting area NEA.

[0234] like Figure 11 As shown, when the light-emitting display panel is in the off state, the first to third light-emitting areas EA1, EA2 and EA3 of the light-emitting display device 100 may not emit light.

[0235] In this state, when external light is incident on the photochromic layer 260 disposed in the non-light-emitting area NEA of the light-emitting display panel, the photochromic layer 260 can become opaque (e.g., black).

[0236] Therefore, even when external light is incident on the light-emitting display panel, the external light can be absorbed by the photochromic layer 260 and color pattern set in the non-light-emitting area NEA, thereby reducing the external light reflectivity.

[0237] The following describes in more detail the features Figure 10 and Figure 11 A light-emitting display panel with a structure.

[0238] Figure 12 It is along Figure 10 The cross-sectional view taken by line EF. Figure 13 It is along Figure 11 The cross-sectional view taken by line GH.

[0239] Constructions and effects that are substantially the same as those described above will not be repeated below.

[0240] like Figure 12 and Figure 13 The structure shown, which includes the light-emitting element 210 and the embankment 220, can be used in conjunction with, for example... Figure 5 The structures of the light-emitting element 210 and the embankment 220 shown are the same.

[0241] Reference Figure 12 Multiple color filters 250 and photochromic layers 260 can be provided on the encapsulation layer 230.

[0242] The multiple color filters 250 may include a first color filter 351, a second color filter 352, and a third color filter 353 with different colors.

[0243] Each of the first to third color filters 351, 352 and 353 may be laterally surrounded by a photochromic layer 260.

[0244] The photochromic layer 260 can overlap with the non-luminescent region NEA in the effective region.

[0245] One side surface of the photochromic layer 260 may be surrounded by a color pattern 1250. The photochromic layer 260 is disposed between the color pattern 1250 and the first light-emitting region EA1, between the color pattern 1250 and the second light-emitting region EA2, and between the color pattern 1250 and the third light-emitting region EA3.

[0246] Color pattern 1250 may include a first color pattern 1251 disposed on the encapsulation layer 230 and a second color pattern 1252 disposed on the first color pattern 1251.

[0247] The first color pattern 1251 and the second color pattern 1252 can be color patterns of different colors. The first color pattern 1251 and the second color pattern 1252 can be formed with colors selected from red (R), green (G) and blue (B).

[0248] For example, when the first color pattern 1251 is a red (R) color pattern, the second color pattern 1252 may have a color selected from green (G) and blue (B).

[0249] As described above, since the first color pattern 1251 and the second color pattern 1252 of different colors overlap each other, the color pattern 1250 can achieve black.

[0250] Therefore, when the light-emitting display panel is driven, the light emitted from the light-emitting element and reaching the color pattern 1250 can be absorbed by the color pattern 1250, thereby preventing the user from seeing the mixture of different colors of light emitted from the light-emitting area.

[0251] Furthermore, even when external light is incident on the luminescent display panel, the external light can be absorbed by the color pattern 1250, thereby improving the visibility of the luminescent display panel.

[0252] Furthermore, when the light-emitting display panel is driven, the light emitted from the light-emitting element 210 and reaching the first photochromic layer 261 and the second photochromic layer 262 can make the first photochromic layer 261 and the second photochromic layer 262 transparent.

[0253] Therefore, even when a user views the luminescent display panel from the side, they can see that it has the appearance of... Figure 12 The path of the light beam L6 is shown. In other words, the same amount of light can be seen when viewing the luminous display panel from the side as when viewing it from the front, ensuring the same brightness level regardless of whether it is viewed from the front or the side.

[0254] In comparison, such as Figure 13 As shown, when the light-emitting display panel is in the off state, each of the first photochromic layer 261 and the second photochromic layer 262 can be in an opaque state.

[0255] Specifically, when the light-emitting display panel is in a closed state (no electric field is applied to the light-emitting element 210) and external light is incident on the light-emitting display panel, the first photochromic layer 261 and the second photochromic layer 262 can remain opaque.

[0256] When the first photochromic layer 261 and the second photochromic layer 262 are opaque, the colors of the first photochromic layer 261 and the second photochromic layer 262 can be different from each other. The colors of the first photochromic layer 261 and the second photochromic layer 262 can be selected from red (R), green (G), and blue (B).

[0257] As described above, since the first photochromic layer 261 and the second photochromic layer 262 with different colors are stacked, the photochromic layer 260 can achieve black.

[0258] The first color pattern 1251 and the second color pattern 1252 can be color patterns of different colors. The first color pattern 1251 and the second color pattern 1252 can be formed with colors selected from red (R), green (G) and blue (B).

[0259] As described above, since the first color pattern 1251 and the second color pattern 1252 of different colors are stacked on top of each other, the color pattern 1250 can achieve black.

[0260] Therefore, even when external light is incident on the light-emitting display panel, the external light can be absorbed by the photochromic layer 260 and color pattern 1250 set in the non-light-emitting area NEA, thereby reducing the external light reflectivity.

[0261] According to embodiments of the present disclosure, a light-emitting display panel having a structure capable of providing excellent FOV characteristics due to the presence of a photochromic layer in a portion of the non-display area, and a light-emitting display device including the light-emitting display panel, can be provided.

[0262] According to embodiments of the present disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, which have a structure that provides reduced external light reflectivity and excellent color characteristics due to the presence of at least two of a color filter, a photochromic layer and a color pattern on the encapsulation layer.

[0263] According to embodiments of the present disclosure, a light-emitting display panel and a light-emitting display device including the light-emitting display panel can be provided, which have a structure that prevents color mixing of light emitted from different light-emitting areas even in the absence of a black matrix by including a photochromic layer and a color pattern.

[0264] The foregoing description has been provided to enable those skilled in the art to acquire and use the technical concepts of this disclosure, and has been provided in the context of a specific application and its requirements. Various modifications, additions, and substitutions to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. The foregoing description and figures are provided merely as examples of the technical concepts of this disclosure for illustrative purposes. That is, the disclosed embodiments are intended to illustrate the scope of the technical concepts of this disclosure. Therefore, the scope of this disclosure is not limited to the embodiments shown, but conforms to the widest scope consistent with the claims. The scope of protection of this disclosure should be interpreted based on the following claims, and all technical concepts within the equivalent scope of these claims should be interpreted as included within the scope of this disclosure.

Claims

1. A light-emitting display panel, comprising: substrate; A first electrode disposed on the substrate; A dam portion overlapping a portion of the upper surface of the first electrode; A light-emitting layer disposed on the first electrode; The second electrode is disposed on the light-emitting layer; An encapsulation layer disposed on the substrate having the second electrode; and A photochromic layer is disposed on the encapsulation layer, the photochromic layer overlapping a portion of the embankment. The light-emitting display panel includes a light-emitting area and a non-light-emitting area. The photochromic layer is disposed in the non-luminescent area and surrounds the luminescent area. When the light-emitting layer emits light, causing light of the first wavelength band to illuminate the photochromic layer, the photochromic layer is in a transparent state, and When the second wavelength of light shines on the photochromic layer, the photochromic layer is in an opaque state, and the second wavelength is shorter than the first wavelength.

2. The light-emitting display panel according to claim 1, wherein when the light-emitting layer does not emit light, light of the second wavelength band irradiates the photochromic layer from the outside of the light-emitting display panel.

3. The light-emitting display panel according to claim 1, wherein when the light-emitting layer emits light and light of the second wavelength band irradiates the photochromic layer from the outside of the light-emitting display panel, the photochromic layer is in a transparent state.

4. The light-emitting display panel according to claim 1, wherein the first wavelength band is in the range of greater than 380nm and less than 760nm, and the second wavelength band is in the range of greater than 100nm and less than 380nm.

5. The light-emitting display panel according to claim 1, further comprising a plurality of color filters disposed on the encapsulation layer and spaced apart from each other, wherein the photochromic layer is disposed between at least two color filters.

6. The light-emitting display panel according to claim 1, wherein the photochromic layer comprises a first photochromic layer disposed on the encapsulation layer and a second photochromic layer disposed on the first photochromic layer.

7. The light-emitting display panel according to claim 6, wherein when the first photochromic layer and the second photochromic layer are in an opaque state, the color of the first photochromic layer is different from the color of the second photochromic layer.

8. The light-emitting display panel according to claim 7, wherein the color of the first photochromic layer and the color of the second photochromic layer are selected from red, green and blue.

9. The light-emitting display panel of claim 6, wherein the area where the first electrode, which does not overlap with the embankment, is disposed is the light-emitting area, and wherein the light-emitting area of ​​the light-emitting display panel includes at least two light-emitting areas that emit light of different colors.

10. The light-emitting display panel according to claim 9, wherein the light-emitting display panel includes a first light-emitting area, a second light-emitting area and a third light-emitting area, and wherein a first color filter corresponding to the first light-emitting area, a second color filter corresponding to the second light-emitting area and a third color filter corresponding to the third light-emitting area are disposed on the encapsulation layer.

11. The light-emitting display panel according to claim 10, wherein at least two of the first color filter, the second color filter, and the third color filter have different heights.

12. The light-emitting display panel according to claim 11, wherein the height of at least one of the first color filter, the second color filter, and the third color filter corresponds to the sum of the height of the first photochromic layer and the height of the second photochromic layer.

13. The light-emitting display panel according to claim 11, wherein the height of at least one of the first color filter, the second color filter, and the third color filter is greater than the sum of the height of the first photochromic layer and the height of the second photochromic layer.

14. The light-emitting display panel of claim 10, wherein the first photochromic layer and the second photochromic layer are disposed in the non-light-emitting area and surround each of the first light-emitting area, the second light-emitting area and the third light-emitting area.

15. The light-emitting display panel of claim 14, wherein each of the first photochromic layer and the second photochromic layer overlaps with a portion of the first electrode in the non-light-emitting region.

16. The light-emitting display panel according to claim 14, wherein a color pattern is further provided in the non-light-emitting area, and wherein the color pattern includes a first color pattern disposed on the encapsulation layer and a second color pattern disposed on the first color pattern.

17. The light-emitting display panel according to claim 16, wherein the first photochromic layer and the second photochromic layer are disposed between the color pattern and the first light-emitting area, between the color pattern and the second light-emitting area, and between the color pattern and the third light-emitting area.

18. The light-emitting display panel of claim 16, wherein the colors of the first color pattern and the second color pattern are different from each other and are selected from red, green and blue.

19. The light-emitting display panel of claim 10, further comprising a fourth light-emitting region, wherein a fourth color filter is disposed on the encapsulation layer, the fourth color filter having a height smaller than that of each of the first color filter, the second color filter, and the third color filter.

20. The light-emitting display panel of claim 5, wherein each of the plurality of color filters is laterally surrounded by the photochromic layer.

21. A light-emitting display panel, comprising: The first, second, and third luminous regions are spaced apart from each other and emit light of different colors. and A photochromic layer, the photochromic layer surrounding each of the first luminescent region, the second luminescent region, and the third luminescent region, and disposed in the non-luminescent region. When the first, second, and third luminescent regions emit light, the photochromic layer is in a transparent state, and When light with a wavelength shorter than visible light is incident on the photochromic layer, the photochromic layer is in an opaque state.

22. The light-emitting display panel according to claim 21, further comprising a color pattern disposed in the non-light-emitting area other than the area where the photochromic layer is disposed.

23. The light-emitting display panel of claim 22, wherein one side surface of the photochromic layer is surrounded by the color pattern.

24. A light-emitting display device comprising a light-emitting display panel according to any one of claims 1 to 23.

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