Light emitting display device

Abstract

A light-emitting display device according to one or more embodiments of the present disclosure can include a substrate including a plurality of sub-pixels having a light-emitting area and a non-light-emitting area; a pixel circuit disposed within the non-light-emitting area on the substrate; at least one insulating layer disposed on the pixel circuit; and a color filter disposed on the at least one insulating layer and corresponding to at least one of the plurality of sub-pixels, wherein one or more of the plurality of sub-pixels can include a low-reflection optical portion adjacent to or in contact with the color filter within the light-emitting area and having at least one transverse electric mode (TE mode) reflection pattern.

Description

[0001] Cross-reference to related applications This application claims the benefit and priority of Korean Patent Application No. 10-2024-0201454, filed in Korea on December 30, 2024, the entire contents of which are incorporated herein by reference for all purposes. Technical Field

[0002] This disclosure relates to a light-emitting display device. Background Technology

[0003] With the advancement of the information age, the demand for display devices for displaying images has increased in various forms. As a result, various types of display devices, such as liquid crystal displays (LCDs), organic light-emitting diode (OLEDs), micro light-emitting diode (LED) displays, and quantum dot (QD) displays, have recently been put into use.

[0004] In display devices, organic light-emitting display devices are self-emissive. In an organic light-emitting display device, holes and electrons are injected into the light-emitting layer from an anode for hole injection and a cathode for electron injection, and the injected holes and electrons combine with each other. Here, the excitons formed by the combination of holes and electrons transition from the excited state to the ground state, allowing the organic light-emitting display device to emit light and display images.

[0005] This type of organic light-emitting display device primarily uses polarizers on the display surface of the panel to reduce external light reflection. However, when an organic light-emitting display device uses polarizers, the transmittance decreases, thereby reducing panel efficiency and increasing power consumption. Summary of the Invention

[0006] One or more embodiments of this disclosure can provide a light-emitting display device that can reduce reflectivity, increase light efficiency, and enhance the color and visual perception of reflected light without using a polarizer.

[0007] Additional advantages and features of this disclosure will be set forth in part in the description which follows, and will become apparent in part to those skilled in the art upon examination of the narrator, or may be learned by practice of the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures specifically pointed out in the written description and claims, as well as the accompanying drawings.

[0008] A light-emitting display device according to one or more embodiments of the present disclosure may include: a substrate including a plurality of sub-pixels having light-emitting regions and non-light-emitting regions; a pixel circuit disposed in the non-light-emitting region on the substrate; at least one insulating layer disposed on the pixel circuit; and a color filter disposed on at least one insulating layer and corresponding to at least one of the plurality of sub-pixels, wherein one or more of the plurality of sub-pixels may include a low-reflection optical portion adjacent to or in contact with the color filter in the light-emitting region and having at least one TE (Transverse Electric) mode reflection pattern.

[0009] According to one or more embodiments of the present disclosure, a light-emitting display device can be provided that can reduce reflectivity, increase light efficiency, and enhance reflected color and visual perception without using a polarizer.

[0010] The light-emitting display device according to one or more embodiments of the present disclosure can reduce reflectivity, increase light efficiency, and enhance reflected color and viewing quality without using a polarizer, and thus can reduce power consumption to achieve low-power driving and reduce production energy to achieve ESG (environmental, social, and governance) effects.

[0011] The effects of this disclosure are not limited to those described above, but those skilled in the art will clearly understand from the following description other effects not described herein.

[0012] The details of this disclosure, described in the sections on technical problems, technical solutions, and beneficial effects, do not specifically describe the essential features of the claims. Therefore, the scope of the claims is not limited by the details described in the detailed description of the invention. Attached Figure Description

[0013] The accompanying drawings are included to provide a further understanding of this disclosure. The drawings are incorporated into and form part of this disclosure. The drawings illustrate aspects and embodiments of this disclosure and, together with the description, serve to explain the principles and examples of this disclosure.

[0014] Figure 1 A light-emitting display device according to an embodiment of the present disclosure is shown.

[0015] Figure 2 This is a circuit diagram showing a sub-pixel of a light-emitting display device according to an embodiment of the present disclosure.

[0016] Figure 3 A plurality of sub-pixels in a display panel according to an embodiment of the present disclosure are shown.

[0017] Figure 4 According to an embodiment of this disclosure Figure 3A sectional view taken by line I-I'.

[0018] Figure 5 The path change of external light in a display panel according to one embodiment of the present disclosure is shown.

[0019] Figure 6 The path change of emitted light in a display panel according to one embodiment of the present disclosure is shown.

[0020] Figure 7 According to another embodiment of this disclosure Figure 3 A sectional view taken by line I-I'.

[0021] Figure 8 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown.

[0022] Figure 9 According to another embodiment of this disclosure Figure 8 The sectional view taken from line II-II'.

[0023] Figure 10 According to another embodiment of this disclosure Figure 8 The sectional view taken from line II-II'.

[0024] Figure 11 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown.

[0025] Figure 12 According to another embodiment of this disclosure Figure 11 The sectional view taken from line III-III'.

[0026] Figure 13 According to another embodiment of this disclosure Figure 11 The sectional view taken from line III-III'.

[0027] Figure 14 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown.

[0028] Figure 15 According to another embodiment of this disclosure Figure 14 A sectional view taken from line IV-IV'.

[0029] Throughout the accompanying drawings and detailed embodiments, unless otherwise described, the same reference numerals shall be construed as indicating the same elements, features, and structures. For clarity, illustration, and / or convenience, the dimensions, lengths, and thicknesses of layers, regions, and elements, and their descriptions, may be exaggerated. Detailed Implementation

[0030] The advantages and features of this disclosure, as well as its implementation methods, have been illustrated by referring to the embodiments described in the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are examples, and are provided so that this disclosure can be complete and comprehensive, to assist those skilled in the art in understanding the inventive concept without limiting the scope of protection of this disclosure.

[0031] The shapes (e.g., size, length, width, height, thickness, position, radius, diameter, and area), dimensions, proportions, angles, quantities, etc., disclosed herein (including the shapes, dimensions, proportions, angles, quantities, etc. shown in the accompanying drawings) are merely examples, and therefore, this disclosure is not limited to the details shown. Any embodiment described herein as an "example" is not necessarily to be construed as superior to other embodiments. However, it should be noted that the relative dimensions of the components shown in the accompanying drawings are part of this disclosure.

[0032] Where terms such as “comprising,” “having,” “including,” “containing,” “constituting,” “made of,” “formed from,” etc., are used for one or more elements, one or more other elements may be added unless terms such as “only” are used. The terminology used in this disclosure is for describing exemplary embodiments only and is not intended to limit the scope of this disclosure. Singular terms may include plural forms unless the context clearly indicates otherwise.

[0033] When interpreting components, they are interpreted as including a range of error, even though no explicit description is provided.

[0034] When describing positional relationships, for example, when the positional order is described as "on top of", "above", "below", "under", and "near", it may include situations where there is no contact between them, unless "only" or "directly" is used.

[0035] When it is mentioned that the first element is "above" the second element, it does not mean that the first element is necessarily above the second element in the accompanying drawings. The upper and lower parts of the related objects can change depending on the orientation of the objects. Therefore, the case of the first element being "above" the second element includes both the case in the accompanying drawings or in the actual configuration where the first element is "below" the second element and the case where the first element is "above" the second element.

[0036] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases can be included unless “only” or “directly” is used.

[0037] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0038] In describing the elements of this disclosure, the terms “first,” “second,” “A,” “B,” “(a),” “(b),” etc., may be used. These terms are intended to identify the respective element and other elements, and are not used to define the nature, basis, order, or number of elements.

[0039] When describing a component as "connected," "joined," "attached," or "bonded" to another component, the component can be directly connected, joined, attached, or bonded to another component, or indirectly connected, joined, attached, or bonded to another component with one or more intermediate components disposed or inserted between them, unless otherwise specified.

[0040] When describing a component as "in contact" or "overlapping" with another component, the component may not only be in direct contact or overlap with another component, but may also be indirect contact or overlap with another component when one or more intermediate components are provided or inserted between them, unless otherwise stated.

[0041] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, "at least one of the first element, the second element, and the third element" can include all combinations of two or more elements selected from the first element, the second element, and the third element, as well as each of the first element, the second element, and the third element.

[0042] Features of the various embodiments of this disclosure may be coupled or combined with each other in part or in whole, may be technically related to each other, and may interact, link, or drive each other in various ways. Embodiments of this disclosure may be implemented or performed independently of each other, or may be implemented or performed together in a mutually dependent or related relationship. In one or more aspects, components of each apparatus according to the various embodiments of this disclosure may be operatively coupled and configured.

[0043] In the following description, various exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings. Regarding the reference numerals for elements in each drawing, the same elements may be shown in other drawings, and similar reference numerals may indicate similar elements, unless otherwise stated. The same or similar elements may be represented by the same reference numerals even if they are shown in different drawings. Furthermore, for ease of description, the scale, dimensions, size, and thickness of each element shown in the drawings may differ from the actual scale, dimensions, size, and thickness; therefore, the embodiments of the present disclosure are not limited to the scale, dimensions, size, and thickness shown in the drawings.

[0044] Figure 1 A light-emitting display device according to an embodiment of the present disclosure is shown.

[0045] In the following text, the X-axis represents the direction parallel to the scan lines, the Y-axis represents the direction parallel to the data lines, and the Z-axis represents the height direction of the light-emitting display device.

[0046] The light-emitting display device according to one embodiment of the present disclosure is implemented as an organic light-emitting display device, but it can also be implemented as a liquid crystal display device, a quantum dot light-emitting diode display device, or an electrophoretic display device.

[0047] refer to Figure 1 According to one embodiment of the present disclosure, the light-emitting display device may include a display panel 110, a scan driver 120 (or gate driver) embedded in the display panel 110, a data driver 130 connected to the display panel 110, a timing controller 160 for controlling the scan driver 120 and the data driver 130, and a power supply circuit 170.

[0048] Display panel 110 includes a display area DA and a non-display area NDA surrounding the display area DA. Display panel 110 includes pixels P disposed within the display area DA to display images. Each pixel P may include multiple subpixels SP. The structure of the subpixels SP can vary depending on the type of light-emitting display device. For example, depending on the structure, subpixels SP can be formed as top-emitting, bottom-emitting, or double-sided-emitting. Subpixels SP represent units capable of forming a specific type of color filter or capable of emitting their own color without forming a color filter. Depending on the light-emitting characteristics, subpixels SP may have one or more other light-emitting areas. For example, multiple subpixels SP can be arranged in a strip or quad pattern, but embodiments of this disclosure are not limited to these. The color type, arrangement type, arrangement order, etc., of the subpixels SP can be configured in various forms depending on the light-emitting characteristics, device lifespan, device specifications, etc.

[0049] Display panel 110 may include data lines DL and scan lines SL (or gate lines) connected to sub-pixels SP. Data lines DL may be configured to cross scan lines SL. Each sub-pixel SP of display panel 110 may be connected to any one data line DL and any one scan line SL. Data lines DL may supply data voltage from data driver 130 to each sub-pixel SP. Scan lines SL may supply scan signals from scan driver 120 to each sub-pixel SP.

[0050] Each sub-pixel SP is turned on by a scan signal. When the data voltage of the data line DL is supplied to the gate of the driving transistor, the light-emitting device can emit light according to the drain-source current of the driving transistor. The scan driver 120 can receive a scan control signal GCS from the timing controller 160. The scan driver 120 can use the scan control signal GCS to supply a scan signal or a light emission control signal to the scan line SL.

[0051] The scan driver 120 can be configured as an in-panel gate driver (GIP) within a non-display area NDA outside one or both sides of the display area DA. Alternatively, the scan driver 120 can be manufactured as a driver chip, mounted on a flexible film, and attached to the non-display area NDA outside one or both sides of the display area DA via tape auto-bonding (TAB).

[0052] Data driver 130 can receive digital video data DATA and data control signal DCS from timing controller 160. Data driver 130 uses data control signal DCS to convert digital video data DATA into analog positive / negative data voltage and supplies analog positive / negative data voltage to data line DL.

[0053] The timing controller 160 receives digital video data (DATA) and timing signals from the host system. The timing signals may include a vertical sync signal, a horizontal sync signal, a data enable signal, and a dot clock. The vertical sync signal defines a frame duration. The horizontal sync signal defines a horizontal duration required to supply data voltage to the pixels of a horizontal line on the display panel 110. The data enable signal defines the duration during which valid data is input. The dot clock is a signal that repeats at predetermined short periods.

[0054] The timing controller 160 can generate a data control signal DCS for controlling the operating timing of the data driver 130 and a scan control signal GCS for controlling the operating timing of the scan driver 120 based on the timing signal. The timing controller 160 can output the scan control signal GCS to the scan driver 120 to control the scan driver 120, and output digital video data DATA and the data control signal DCS to the data driver 130 to control the data driver 130.

[0055] The power supply circuit 170 can use the input voltage to generate and supply multiple drive voltages required for the operation of all circuit structures of the light-emitting display device. The power supply circuit 170 can generate a first power supply voltage EVDD (or pixel power supply voltage), a second power supply voltage EVSS (or common power supply voltage), and an initialization voltage Vref (or reference voltage), and supply the generated voltages to the display panel 110. The power supply circuit 170 can generate and supply various drive voltages required for the operation of the scan driver 120, the data driver 130, and the timing controller 160.

[0056] Figure 2 This is a circuit diagram illustrating a sub-pixel of a light-emitting display device according to an embodiment of the present disclosure.

[0057] refer to Figure 2 Each pixel P comprises multiple sub-pixels SP constituting a unit pixel. Each of the multiple sub-pixels SP has: a pixel circuit comprising a 3T (transistor) 1C (capacitor) including a driving transistor DR, a first switching transistor TR1, a second switching transistor TR2, and a storage capacitor Cst, and a light-emitting device ED, but is not limited thereto. Each sub-pixel SP may further include compensation circuitry. In this case, the sub-pixel SP can have various structures such as 3T2C, 4T1C, 4T2C, 5T1C, 5T2C, 6T1C, 6T2C, 7T1C, and 7T2C.

[0058] At least one thin-film transistor DR, TR1, and TR2 in each sub-pixel SP may include a gate, a source, and a drain. Since the source and drain are not fixed and can change depending on the voltage and current direction applied to the gate, either the source or the drain can be represented as a first electrode, and the other as a second electrode. At least one transistor DR, TR1, and TR2 may be made of at least one of polycrystalline silicon, amorphous silicon, and oxide semiconductors. Transistors DR, TR1, and TR2 may be P-type or N-type, or P-type and N-type may be used interchangeably.

[0059] The driving transistor DR corresponds to the transistor used to drive the light-emitting device ED, and the driving transistor DR includes a first node N1 to which a data voltage Vdata is applied, a second node N2 connected to the pixel electrode (first electrode or anode) of the light-emitting device ED, and a third node N3 connected to the first power supply voltage line DVL (or pixel power supply voltage line) and supplied with the first power supply voltage EVDD (or pixel power supply voltage). For example, the driving transistor DR can generate a data current through the first power supply voltage EVDD supplied from the first power supply voltage line DVL, and can supply the data current to the first electrode of the light-emitting device ED.

[0060] The first switching transistor TR1 can be used to supply the data voltage Vdata from the data line DL to the first node N1 of the driving transistor DR. The second switching transistor TR2 can be used to supply the reference voltage Vref from the reference voltage line RVL to the second node N2 of the driving transistor DR, or it can output the voltage of the second node N2 of the driving transistor DR. A storage capacitor Cst can be connected between the first node N1 and the second node N2 of the driving transistor DR. The storage capacitor Cst can be used to hold the data voltage Vdata supplied to the driving transistor DR for one frame, but the embodiments of this disclosure are not limited thereto.

[0061] The light-emitting device (ED) may include a pixel electrode (first electrode or anode) connected to a second node N2 of a driving transistor DR, and a common electrode (second electrode or cathode) to which a second power supply voltage EVSS (or a common power supply voltage) can be applied. The ED may emit light in response to a driving current generated by the driving transistor DR through a light-emitting layer (or organic light-emitting layer) between the first and second electrodes. The pixel electrode of the ED may be an independent electrode for each light-emitting device, and the common electrode and light-emitting layer of the ED may be a common layer shared by all light-emitting devices, but the embodiments of this disclosure are not limited thereto.

[0062] Figure 3 A plurality of sub-pixels in a display panel according to an embodiment of the present disclosure are shown. Figure 4 According to an embodiment of this disclosure Figure 3 A sectional view taken by line I-I'.

[0063] refer to Figure 3 and Figure 4 According to one embodiment of the present disclosure, the display panel 110 can be configured as a top-emitting type, a bottom-emitting type, or a double-sided emitting type. For example, the display panel 110 can be implemented as a bottom-emitting type, but the embodiments of the present disclosure are not limited thereto.

[0064] A display panel 110 according to an embodiment of the present disclosure may include a plurality of sub-pixels SP1, SP2, SP3, and SP4. Each of the sub-pixels SP1, SP2, SP3, and SP4 may include light-emitting regions EA1, EA2, EA3, and EA4 and a non-light-emitting region NEA. The non-light-emitting region NEA of each of the sub-pixels SP1, SP2, SP3, and SP4 may include pixel circuits CA1, CA2, CA3, and CA4. For example, each of the sub-pixels SP1, SP2, SP3, and SP4 may be provided with at least one scan line SL extending along a first direction (or the X-axis direction), multiple data lines DL extending along a second direction (or the Y-axis direction), and one or more power supply voltage lines DVL and RVL, but the embodiments of the present disclosure are not limited thereto.

[0065] Multiple subpixels SP1, SP2, SP3, and SP4 can be unit pixels displaying different colors. These subpixels SP1, SP2, SP3, and SP4 can be arranged in a stripe pattern along a first direction (or the X-axis direction) or a second direction (or the Y-axis direction). For example, multiple subpixels SP1, SP2, SP3, and SP4 can be arranged along the first direction (or the X-axis direction), but are not limited to this. The arrangement order or type of the multiple subpixels can be varied.

[0066] Multiple sub-pixels SP1, SP2, SP3, and SP4 may include light-emitting regions EA1, EA2, EA3, and EA4 and a non-light-emitting region NEA, wherein a light-emitting device ED, configured with a pixel electrode AE, a light-emitting layer EL, and a common electrode CE, is disposed within the light-emitting regions EA1, EA2, EA3, and EA4 and emits light. For example, the pixel circuits CA1, CA2, CA3, and CA4 of each of the sub-pixels SP1, SP2, SP3, and SP4 may be disposed within the non-light-emitting region NEA. For example, the pixel circuits CA1, CA2, CA3, and CA4 of each of the sub-pixels SP1, SP2, SP3, and SP4 may include at least one thin-film transistor DR, TR1, and TR2 and a storage capacitor Cst, but the embodiments of this disclosure are not limited thereto.

[0067] According to one embodiment of the present disclosure, the display panel 110 can be implemented as a bottom-emitting type, and the light-emitting regions EA1, EA2, EA3, EA4 of each of the sub-pixels SP1, SP2, SP3, SP4 and the pixel circuits CA1, CA2, CA3, CA4 disposed in the non-light-emitting region NEA may not overlap with each other or may at least partially overlap with each other. For example, the light-emitting regions EA1, EA2, EA3, and EA4 may be disposed on the upper side in the second direction (or the Y-axis direction), and the pixel circuits CA1, CA2, CA3, and CA4 in the non-light-emitting region NEA may be disposed on the lower side in the second direction, but the embodiments of the present disclosure are not limited thereto.

[0068] The non-emissive region NEA may further include a dam BA covering the edge of the pixel electrode AE ​​of each of sub-pixels SP1, SP2, SP3, and SP4. The dam BA may be configured to cover the non-emissive region NEA of each of sub-pixels SP1, SP2, SP3, and SP4. For example, the dam BA may be configured to define the emissive regions EA1, EA2, EA3, and EA4 of each of sub-pixels SP1, SP2, SP3, and SP4. The dam BA may be positioned around the periphery of the emissive regions EA1, EA2, EA3, and EA4 of each of sub-pixels SP1, SP2, SP3, and SP4. The dam BA may be located between the pixel electrode AE ​​of each of sub-pixels SP1, SP2, SP3, and SP4 and the emissive layer EL.

[0069] The light-emitting regions EA1, EA2, EA3, and EA4 can correspond to the light-emitting regions in each of the sub-pixels SP1, SP2, SP3, and SP4. For example, each of the sub-pixels SP1, SP2, SP3, and SP4 can include a light-emitting device ED constructed by overlapping a pixel electrode AE, a light-emitting layer EL, and a common electrode CE, and the light-emitting regions EA1, EA2, EA3, and EA4 can correspond to the light-emitting device ED in each of the sub-pixels SP1, SP2, SP3, and SP4.

[0070] The emitting regions EA1, EA2, EA3, and EA4 may include the first to fourth emitting regions EA1, EA2, EA3, and EA4 that emit light of different colors from each other. For example, the emitting regions EA1, EA2, EA3, and EA4 may overlap with the corresponding color filters CF1, CF2, CF3, and CF4, and thus may emit light of different colors.

[0071] Each of the color filters CF1, CF2, CF3, and CF4 can emit light of a different color. For example, each of the color filters CF1, CF2, CF3, and CF4 can be made of an organic material that transmits different colors of light. The color filters CF1, CF2, CF3, and CF4 may include a first color filter CF1 that transmits red light, a second color filter CF2 that transmits white light, a third color filter CF3 that transmits blue light, and a fourth color filter CF4 that transmits green light.

[0072] The first light-emitting area EA1 of the first sub-pixel SP1 can emit red light through the first color filter CF1. The second light-emitting area EA2 of the second sub-pixel SP2 can emit white light without a color filter or through the second color filter CF2. The third light-emitting area EA3 of the third sub-pixel SP3 can emit blue light through the third color filter CF3. The fourth light-emitting area EA4 of the fourth sub-pixel SP4 can emit green light through the fourth color filter CF4. However, the embodiments disclosed herein are not limited to these.

[0073] refer to Figure 4 A display panel 110 according to an embodiment of the present disclosure may include a substrate 111, at least one insulating layer BF and PAS, a plurality of color filters CF1, CF2, CF3 and CF4, low-reflection optics 200 and 300, a planarization layer PLN, a pixel electrode AE, a light-emitting layer EL, a common electrode CE, and a dam BA. The low-reflection optics 200 and 300 according to an embodiment of the present disclosure may be configured to be adjacent to or in contact with the color filters CF1, CF2, CF3 and CF4 in each of the light-emitting regions EA1, EA2, EA3 and EA4. For example, the low-reflection optics 200 and 300 may be disposed on each of the color filters CF1, CF2, CF3 and CF4.

[0074] At least one voltage signal line may be disposed on the substrate 111. For example, multiple data lines DL, a first power supply voltage line DVL, and a reference voltage line RVL may be disposed on the substrate 111. For example, the multiple data lines DL, the first power supply voltage line DVL, and the reference voltage line RVL may be made of the same material in the same layer as the light-shielding layers disposed in the pixel circuits CA1, CA2, CA3, and CA4, but the embodiments of this disclosure are not limited thereto.

[0075] At least one insulating layer BF and PAS may be disposed on substrate 111. At least one insulating layer BF and PAS may be disposed on pixel circuits CA1, CA2, CA3, and CA4, and at least one insulating layer BF and PAS may include a buffer layer BF and a passivation layer PAS. For example, buffer layer BF may be disposed on substrate 111. Buffer layer BF may be configured to cover at least one voltage signal line DL, DVL, and RVL on substrate 111, as well as a light-shielding layer. Pixel circuits CA1, CA2, CA3, and CA4 and passivation layer PAS may be disposed on buffer layer BF. For example, each of pixel circuits CA1, CA2, CA3, and CA4 may include at least one thin-film transistor DR, ST1, and ST2, and a storage capacitor Cst.

[0076] At least one thin-film transistor DR, ST1, and ST2 disposed between the buffer layer BF and the passivation layer PAS may further include a gate insulating layer and an interlayer insulating layer interposed between the active layer, gate, and source / drain of at least one thin-film transistor DR, ST1, and ST2, or covering the active layer, gate, and source / drain of at least one thin-film transistor DR, ST1, and ST2, but embodiments of this disclosure are not limited thereto. For example, at least one insulating layer BF and PAS may be configured to contain materials such as silicon oxide (SiO2). x ), silicon nitride (SiN) x The present disclosure may be a single layer or multiple layers of inorganic insulating materials of aluminum oxide (Al2O3) or aluminum oxide (Al2O3), but the embodiments thereof are not limited thereto.

[0077] Multiple color filters CF1, CF2, CF3, and CF4 can be disposed on at least one insulating layer BF and PAS. For example, multiple color filters CF1, CF2, CF3, and CF4 can be disposed on a passivation layer PAS. Multiple color filters CF1, CF2, CF3, and CF4 can be configured to correspond to each of sub-pixels SP1, SP2, SP3, and SP4. For example, a first color filter CF1 can be disposed in the first emitting region EA1 of the first sub-pixel SP1 to convert white light emitted from the light-emitting device ED into red light. In the second emitting region EA2 of the second sub-pixel SP2, a second color filter CF2 may not be disposed, or a second color filter CF2 that emits white light emitted from the light-emitting device ED may be disposed. In the third emitting region EA3 of the third sub-pixel SP3, a third color filter CF3 that converts white light emitted from the light-emitting device ED into blue light can be disposed. In the fourth emitting region EA4 of the fourth sub-pixel SP4, a fourth color filter CF4 that converts white light emitted from the light-emitting device ED into green light can be disposed.

[0078] A planarization layer PLN (or outer coating) may be disposed on the passivation layer PAS and multiple color filters CF1, CF2, CF3, and CF4. The planarization layer PLN may be configured to planarize the steps caused by the pixel circuits CA1, CA2, CA3, and CA4 disposed on the substrate 111, at least one voltage signal line DL, DVL, and RVL, and the multiple color filters CF1, CF2, CF3, and CF4, and may be composed of an organic insulating material. For example, the planarization layer PLN may be composed of organic materials such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin, but embodiments of this disclosure are not limited thereto.

[0079] The pixel electrode AE ​​(first electrode or anode), the light-emitting layer EL (or organic light-emitting layer), and the common electrode CE (second electrode or cathode) constituting the light-emitting device ED can be disposed on the planarization layer PLN. Furthermore, the embankment BA configured to define the opening region (or light-emitting region) of the pixel electrode AE ​​can be further disposed on the planarization layer PLN.

[0080] Pixel electrodes AE can be set on the planarization layer PLN. Pixel electrodes AE can be patterned and set on each of the sub-pixels SP1, SP2, SP3, and SP4 on the planarization layer PLN.

[0081] Pixel electrodes (AEs) can be formed from transparent or semi-transparent metallic materials. For example, pixel electrodes (AEs) can be formed from transparent conductive materials (TCOs) such as indium tin oxide (ITO) or indium zinc oxide (IZO) that transmit light. Pixel electrodes (AEs) can also be formed from semi-transparent conductive materials such as magnesium (Mg), silver (Ag), or alloys of magnesium (Mg) and silver (Ag). For example, pixel electrodes (AEs) formed from semi-transparent metallic materials can improve light extraction efficiency through microcavities. Pixel electrodes (AEs) can serve as the anode of a light-emitting device (ED).

[0082] A dam BA can be disposed on the pixel electrode AE ​​and the planarization layer PLN. The dam BA can be disposed on the planarization layer PLN to cover a portion of the edge of the pixel electrode AE. The dam BA can be configured to define an opening region (or light-emitting region) of the pixel electrode AE. For example, the dam BA can be disposed between the pixel electrode AE ​​and the light-emitting layer EL. The opening region of the pixel electrode AE ​​can correspond to the light-emitting regions EA1, EA2, EA3, and EA4 of each of the sub-pixels SP1, SP2, SP3, and SP4. For example, the pixel electrode AE ​​exposed by the dam BA can be electrically connected by direct contact with the light-emitting layer EL and the common electrode CE, thereby forming a light-emitting device ED. For example, the dam BA can be omitted.

[0083] An emissive layer (EL) (or organic emissive layer) can be disposed on the pixel electrode AE ​​and the embankment BA. The emissive layer EL may include a hole transport layer, a light-emitting material layer, and an electron transport layer. For example, when a voltage is applied to the pixel electrode AE ​​and the common electrode CE, holes and electrons can move to the emissive layer EL through the hole transport layer and the electron transport layer, respectively, and can combine with each other in the emissive layer EL to emit light. The emissive layer EL may be a common layer formed together above multiple sub-pixels SP1, SP2, SP3, and SP4. For example, the emissive layer EL may be a white emissive layer that emits white light.

[0084] According to one embodiment of the present disclosure, the light-emitting layer EL may include two or more light-emitting layers to emit white light. For example, the light-emitting layer EL may be configured as a series structure including a first light-emitting layer and a second light-emitting layer stacked vertically to emit white light by mixing the first light and the second light. For example, the light-emitting layer EL may also be constructed by vertically stacking three or four light-emitting layers, but the embodiments of the present disclosure are not limited thereto.

[0085] A common electrode CE can be disposed on the light-emitting layer EL. The common electrode CE can be a common layer formed together above multiple sub-pixels SP1, SP2, SP3, and SP4. The common electrode CE can be disposed on the pixel electrodes AE and the light-emitting layer EL that are in contact with each other to constitute a light-emitting device ED. For example, the common electrode CE can be formed of a highly reflective metallic material such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, a stacked structure of Ag alloy and ITO (ITO / Ag alloy / ITO), a MoTi alloy, and a stacked structure of MoTi alloy and ITO (ITO / MoTi alloy / ITO). The Ag alloy can be an alloy of silver (Ag), palladium (Pd), copper (Cu), etc. The MoTi alloy can be an alloy of molybdenum (Mo) and titanium (Ti). The common electrode CE can be the cathode of the light-emitting device ED.

[0086] According to one embodiment of the present disclosure, the display panel 110 may include low-reflection optics 200 and 300, which are adjacent to or in contact with color filters CF1, CF2, CF3, CF4 in the light-emitting regions EA1, EA2, EA3, EA4 of each of the sub-pixels SP1, SP2, SP3, SP4.

[0087] According to one embodiment of the present disclosure, the low-reflection optics 200 and 300 may include a TE (lateral electric) mode reflection pattern 220.

[0088] The TE mode reflection pattern 220 can be configured as multiple TE mode reflection patterns 220, and the multiple TE mode reflection patterns 220 can extend in a first direction (or X-axis direction) or a second direction (or Y-axis direction) of the light-emitting regions EA1, EA2, EA3 and EA4, and can be arranged spaced apart from each other. For example, the multiple TE mode reflection patterns 220 can extend in the second direction and can be set to be spaced apart from each other in the first direction.

[0089] Multiple TE mode reflection patterns 220 can be configured such that the width of each TE mode reflection pattern 220 or the distance between adjacent TE mode reflection patterns 220 is less than the wavelength range of light from the corresponding sub-pixels SP1, SP2, SP3, and SP4. For example, the multiple TE mode reflection patterns 220 disposed in each of the sub-pixels SP1, SP2, SP3, and SP4 can be configured such that their widths or distances differ from each other. For example, the width of each TE mode reflection pattern 220 or the distance between adjacent TE mode reflection patterns 220 can be from 200 nm to 1000 nm, but the embodiments of this disclosure are not limited thereto.

[0090] The TE mode reflective pattern 220 may contain conductive materials or conductive organic materials. For example, an induced current can be generated by the conductive material in the TE mode reflective pattern 220. For example, the conductive material may include metallic materials such as gold (Au), silver (Ag), aluminum (Al), copper (Cu), molybdenum-titanium (MoTi), indium tin oxide (ITO), indium zinc oxide (IZO), or indium gallium zinc oxide (IGZO). Furthermore, the conductive organic material may include conductive polymer materials such as PEDOT:PSS, but embodiments of this disclosure are not limited thereto.

[0091] The TE mode reflective pattern 220 can generate an induced current to absorb or reflect TE mode light perpendicular to the pattern and can transmit horizontal TM mode light. For example, TE mode refers to the case where the electric field component of the electromagnetic wave is perpendicular to the propagation direction, while TM (transverse magnetic) mode refers to the case where the electric field component is parallel to the propagation direction. For example, when light propagates horizontally, the component of light whose electric field vibrates in the vertical direction (e.g., up-down direction) is in TE mode, while the component of light whose electric field vibrates in the horizontal direction (e.g., left-right direction) is in TM mode.

[0092] refer to Figure 4 According to one embodiment of the present disclosure, low-reflection optical units 200 and 300 can be disposed on the color filters CF1, CF2, CF3, CF4 of each of the sub-pixels SP1, SP2, SP3, SP4. Low-reflection optical units 200 and 300 can be disposed in each of the plurality of sub-pixels SP1, SP2, SP3, and SP4.

[0093] The low-reflection optical components 200 and 300 may include a first low-reflection optical layer 200 and a second low-reflection optical layer 300. The first low-reflection optical layer 200 may be disposed on color filters CF1, CF2, CF3 and CF4, and the second low-reflection optical layer 300 may be disposed on the first low-reflection optical layer 200.

[0094] The first low-reflection optical layer 200 may include a TE mode reflection pattern 220. For example, the first low-reflection optical layer 200 may include a light absorption pattern 210, a TE mode reflection pattern 220, and a protective layer 215.

[0095] The light-absorbing pattern 210 can be configured to have light-absorbing properties. For example, the light-absorbing pattern 210 can contain a light-absorbing material or a black material. For example, the light-absorbing pattern 210 can contain an insulating light-absorbing material such as black resin or graphite, but the embodiments of this disclosure are not limited thereto. The light-absorbing pattern 210 can correspond to each of the TE mode reflection patterns 220. The light-absorbing pattern 210 can be disposed on color filters CF1, CF2, CF3, and CF4. The TE mode reflection pattern 220 can be disposed on the light-absorbing pattern 210. The light-absorbing pattern 210 and the TE mode reflection pattern 220 can be configured to have the same pattern as each other.

[0096] The protective layer 215 can be configured to support the light absorption pattern 210 and the TE mode reflection pattern 220. The protective layer 215 can be made of a non-conductive material. For example, the protective layer 215 can be made of an organic or inorganic film with non-conductive properties. The protective layer 215 can be configured to surround the periphery of the stacked light absorption pattern 210 and the TE mode reflection pattern 220.

[0097] A second low-reflection optical layer 300 may be disposed on the first low-reflection optical layer 200. For example, the second low-reflection optical layer 300 may contain anisotropic birefringent material to have phase retardation characteristics. The second low-reflection optical layer 300 may contain reactive liquid crystal as anisotropic birefringent material. The second low-reflection optical layer 300 may be configured to have a transmission axis of 45° or 135° (or -45°) and may be a QWP (quarter-wave plate) with a phase retardation value of λ / 4.

[0098] According to one embodiment of this disclosure, a first low-reflection optical layer 200 may be disposed on the upper surface of each of the color filters CF1, CF2, CF3, CF4 in the light-emitting regions EA1, EA2, EA3, EA4 of each of the plurality of sub-pixels SP1, SP2, SP3, SP4. It may absorb a portion of the external light incident through the substrate 111 via a light absorption pattern 210, absorb or reflect the TE mode light component of the external light via a TE mode reflection pattern 220, and transmit only the TM mode light component of the external light. Furthermore, a second low-reflection optical layer 300 may prevent external light from being reflected by converting light polarized to TM mode light that has passed through the TE mode reflection pattern 220 into circularly polarized light.

[0099] For example, when external light with TE mode and TM mode components in an unpolarized state is incident on the first low-reflection optical layer 200, a portion of the light can be absorbed by the light absorption pattern 210, and the TE mode light can be absorbed or reflected by the TE mode reflection pattern 220, thereby eliminating a portion of the external light. The second low-reflection optical layer 300 can convert the TM mode component of the external light into circularly polarized light. Then, the circularly polarized external light can be reflected by the common electrode CE and can be converted into 0° linearly polarized light while passing through the second low-reflection optical layer 300 again. The 0° linearly polarized external light can be absorbed or reflected by the TE mode reflection pattern 220 and can be mostly absorbed while passing through the light absorption pattern 210 again. Therefore, the low-reflection optical units 200 and 300 according to an embodiment of the present disclosure can reduce external light reflection in a plurality of sub-pixels SP1, SP2, SP3, and SP4.

[0100] Figure 5 The path change of external light in a display panel according to one embodiment of the present disclosure is shown. Figure 6 The path change of emitted light in a display panel according to one embodiment of the present disclosure is shown.

[0101] refer to Figure 5 and Figure 6 According to one embodiment of the present disclosure, the display panel 110 can reduce the reflectivity of external light and improve the light extraction efficiency of emitted light.

[0102] refer to Figure 5 External light can be incident on the display panel 110 from the outside through the substrate 111, and this external light 1 can be considered as 100% external light. External light 1 can pass through the light absorption pattern 210, and a portion of external light 1 can be absorbed. Since the light absorption pattern 210 is not formed on the entire incident surface but is formed in a patterned manner, it can affect only a portion of all external light 1. For example, the light absorption pattern 210 can absorb 50% of external light 1. The external light 1 that has passed through the light absorption pattern 210 can be incident on the TE mode reflection pattern 220, and can be separated into external light 2-1 of the TM mode component and external light 2-2 of the TE mode component.

[0103] For example, the transmitted external light 2-1 can be 25% of external light 1, and the reflected external light 2-2 can be 25% of external light 1. In this case, the 25% transmitted external light 2-1 can be further reduced based on the TM transmittance characteristics of the TE mode reflective pattern 220, and the 25% reflected external light 2-2 can be further reduced based on the TE reflectance characteristics. For example, when the TM transmittance of the TE mode reflective pattern 220 is 91% and the TE reflectance is 71%, the transmitted external light 2-1 can be 23%, and the reflected external light 2-2 can be 18%.

[0104] When the transmitted external light 2-1 reaches the common electrode CE, it can be reflected by the CE, and its phase can be changed to become right-hand circularly polarized light. 23% of the reflected external light 3 can be re-intruded onto the TE mode reflective pattern 220, 16% of the TE mode component of external light 4 can be reflected back onto the common electrode CE, and 16% of the external light 5 can pass through the light absorption pattern 210 and be emitted as 16% reflected light 6 towards the substrate 111. Therefore, the incident external light 1 can output 34% reflected light to the outside, which consists of 18% of the external light 2-2 pre-reflected by the TE mode reflective pattern 220 and 16% of the external light 6 reflected from the interior of the display panel 110.

[0105] Therefore, the display panel 110 according to one embodiment of the present disclosure can reduce the reflectivity by about 4% compared to the 38% external light reflection when a transmittance control film with 62% transmittance is applied.

[0106] refer to Figure 6 Light can be emitted from the light-emitting device (ED) of the display panel 110, and the emitted light 1 can be considered as 100% emitted light. Emitted light 1 can be incident on the TE mode reflective pattern 220 and can be divided into emitted light 2-1 in TM mode and emitted light 2-2 in TE mode. For example, the transmitted emitted light 2-1 can be 50% of emitted light 1, and the reflected emitted light 2-2 can be 50% of emitted light 1. At this time, the 50% transmitted emitted light 2-1 and 50% reflected emitted light 2-2 can be reduced according to the TM transmittance and TE reflectance characteristics of the TE mode reflective pattern 220. For example, when the TM transmittance of the TE mode reflective pattern 220 is 91% and the TE reflectance is 71%, the transmitted emitted light 2-1 can be 46%, and the reflected emitted light 2-2 can be 36%.

[0107] The reflected emitted light 2-2 can reach the common electrode CE and can be reflected, and 36% of the reflected emitted light 3 can pass through the TE mode reflective pattern 220 again, and according to the TM transmittance, 32% of the emitted light 4 can be emitted to the substrate 111. Therefore, the emitted light 1 can output 78% of the emitted light to the outside, which consists of the 46% of emitted light 2-1 pre-transmitted through the TE mode reflective pattern 220 and the 32% of emitted light 4 reflected from the inside of the display panel 110.

[0108] Therefore, the display panel 110 according to one embodiment of the present disclosure can improve the light extraction efficiency by about 16% compared to the 62% emitted light output when a transmittance control film is applied.

[0109] Figure 7 According to another embodiment of this disclosure Figure 3 A sectional view taken by line I-I'. Figure 7 It is shown in the reference Figures 1 to 6 The described embodiment of the light-emitting display device features a modified arrangement of the low-reflection optical components. (Refer to...) Figure 7 In the following description, except for modified structures, the same reference numerals will be used for the same parts, and redundant descriptions of them will be omitted or briefly described.

[0110] refer to Figure 7 According to another embodiment of this disclosure, a low-reflection optical element 200 may be disposed between color filters CF1, CF2, CF3, and CF4 and the substrate 111, and a low-reflection optical element 300 may be disposed on color filters CF1, CF2, CF3, and CF4. For example, a first low-reflection optical layer 200 of the low-reflection optical elements 200 and 300 may be disposed between color filters CF1, CF2, CF3, and CF4 and the substrate 111, and a second low-reflection optical layer 300 may be disposed on color filters CF1, CF2, CF3, and CF4.

[0111] The first low-reflection optical layer 200 may include a light absorption pattern 210 and a TE mode reflection pattern 220. The first low-reflection optical layer 200 may be formed in a passivation layer PAS. For example, the passivation layer PAS may be configured to support the light absorption pattern 210 and the TE mode reflection pattern 220. The passivation layer PAS may be made of a non-conductive material. For example, the passivation layer PAS may be made of an inorganic film having non-conductive properties. The passivation layer PAS may be configured to surround the outer periphery of the light absorption pattern 210 and the TE mode reflection pattern 220. According to another embodiment of this disclosure, the light absorption pattern 210 and the TE mode reflection pattern 220 of the first low-reflection optical layer 200 may be disposed on the passivation layer PAS and may be configured to be covered by color filters CF1, CF2, CF3, and CF4, but the embodiments of this disclosure are not limited thereto.

[0112] According to another embodiment of this disclosure, the low-reflection optical components 200 and 300 may not be configured as separate layers of the display panel 110, but may be integrated into the passivation layer PAS or color filters CF1, CF2, CF3 and CF4. Therefore, the light-emitting display device according to another embodiment of this disclosure can reduce costs, optimize manufacturing processes, reduce reflectivity, and improve light efficiency through uni-materialization.

[0113] Figure 8 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown. Figure 9 According to another embodiment of this disclosure Figure 8 The sectional view taken from line II-II'. Figure 10 According to another embodiment of this disclosure Figure 8 The sectional view taken from line II-II'. Figures 8 to 10 It is shown in the reference Figures 1 to 7 The described embodiment of the light-emitting display device features a modified arrangement of the low-reflection optical components. (Refer to...) Figures 8 to 10 In the following description, except for modified structures, the same reference numerals will be used for the same parts, and redundant descriptions will be omitted or briefly described.

[0114] refer to Figures 8 to 10 According to another embodiment of the present disclosure, the low-reflection optical units 200 and 300 can be disposed in at least one of the plurality of sub-pixels SP1, SP2, SP3 and SP4. For example, the low-reflection optical units 200 and 300 can be disposed in the second sub-pixel SP2 of the plurality of sub-pixels SP1, SP2, SP3 and SP4.

[0115] refer to Figure 9 According to another embodiment of this disclosure, the low-reflection optical components 200 and 300 can be disposed on the second color filter CF2 of the second sub-pixel SP2. For example, the second sub-pixel SP2 can be a white sub-pixel that emits white light from the light-emitting device ED as is.

[0116] By selectively arranging low-reflection optical elements 200 and 300 in the second sub-pixel SP2, the unit reflectivity of the second sub-pixel SP2, which has a relatively high reflectivity compared to other sub-pixels SP1, SP3, and SP4, can be selectively reduced.

[0117] Furthermore, the low-reflection optics 200 and 300 can be disposed in one or more selected sub-pixels among the plurality of sub-pixels SP1, SP2, SP3, and SP4. For example, the low-reflection optics 200 and 300 can be selectively disposed in the second sub-pixel SP2, which is a white sub-pixel, and the fourth sub-pixel SP4, which is a green sub-pixel, or they can be disposed in all sub-pixels from the first sub-pixel to the fourth sub-pixel SP1, SP2, SP3, and SP4, but the embodiments of this disclosure are not limited thereto.

[0118] refer to Figure 10 According to another embodiment of this disclosure, the second sub-pixel SP2 can be a white sub-pixel that does not require a color filter.

[0119] Low-reflection optics 200 and 300 can be selectively disposed in the second sub-pixel SP2 where no color filter is disposed. Low-reflection optics 200 and 300 can also be disposed on the passivation layer PAS corresponding to the second sub-pixel SP2.

[0120] Low-reflection optics 200 and 300 can be disposed on the passivation layer PAS between the first sub-pixel SP1 and the third sub-pixel SP3 adjacent to the second sub-pixel SP2. For example, low-reflection optics 200 and 300 can have the same or different heights as the color filters CF1 and CF3 of the adjacent first sub-pixel SP1 and third sub-pixel SP3. For example, low-reflection optics 200 and 300 can be configured to have the same height as the first color filter CF1 and the third color filter CF3 within a process tolerance range.

[0121] According to another embodiment of this disclosure, low-reflection optical units 200 and 300 are selectively disposed in the second sub-pixel SP2, which does not have a color filter, thereby selectively reducing the unit reflectivity of the second sub-pixel SP2, which has a relatively high reflectivity compared to other sub-pixels SP1, SP3, and SP4 due to the absence of a color filter. Therefore, the light-emitting display device according to another embodiment of this disclosure can optimize the unit reflectivity of each of the sub-pixels SP1, SP2, SP3, and SP4, reduce reflections caused by external light, and improve light extraction efficiency.

[0122] Figure 11 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown. Figure 12 According to another embodiment of this disclosure Figure 11 The sectional view taken from line III-III'. Figure 13 According to another embodiment of this disclosure Figure 11 The sectional view taken from line III-III'. Figures 11 to 13 It is shown in the reference Figures 1 to 10The described embodiment of the light-emitting display device features a modified configuration of the low-reflection optics. (Refer to...) Figures 11 to 13 In the following description, except for modified configurations, the same reference numerals will be used for the same parts, and redundant descriptions will be omitted or briefly described.

[0123] refer to Figures 11 to 13 According to another embodiment of this disclosure, low-reflection optical units 200 and 300 can be disposed in at least one of a plurality of sub-pixels SP1, SP2, SP3, and SP4. For example, low-reflection optical units 200 and 300 can be disposed in the first sub-pixel SP1 of the plurality of sub-pixels SP1, SP2, SP3, and SP4. For example, the first sub-pixel SP1 can be provided with a first color filter CF1 that converts white light into red light.

[0124] By selectively arranging low-reflection optics 200 and 300 in the first sub-pixel SP1, the reflected color and visual perception of the first sub-pixel SP1 can be improved. Furthermore, low-reflection optics 200 and 300 can be arranged in one or more selected sub-pixels among the plurality of sub-pixels SP1, SP2, SP3, and SP4. For example, low-reflection optics 200 and 300 can be selectively arranged in one or more sub-pixels among the plurality of sub-pixels SP1, SP2, SP3, and SP4 where improved reflected color and visual perception are desired, or they can be arranged in all sub-pixels from the first to the fourth sub-pixels SP1, SP2, SP3, and SP4, but the embodiments of this disclosure are not limited thereto.

[0125] refer to Figure 12 and Figure 13 According to another embodiment of the present disclosure, the low-reflection optical sections 200 and 300 may include a first low-reflection optical layer 200 and a second low-reflection optical layer 300. For example, the low-reflection optical sections 200 and 300 may include a light absorption pattern 210, a TE mode reflection pattern 220, and a protective layer 215.

[0126] refer to Figure 12 According to another embodiment of this disclosure, the first low-reflection optical layer 200 may include one or more light absorption patterns 230a, 230b, and 230c formed of the same colored material as the color filters CF1, CF2, CF3, and CF4 corresponding to each of the sub-pixels SP1, SP2, SP3, and SP4. For example, the light absorption patterns 230a, 230b, and 230c may include a first light absorption pattern 230a formed of the same material as the first color filter CF1, a second light absorption pattern 230b formed of the same material as the third color filter CF3, and a third light absorption pattern 230c formed of the same material as the fourth color filter CF4.

[0127] The first low-reflection optical layer 200 may include light absorption patterns 230a, 230b and 230c made of the material of all color filters CF1, CF3 and CF4 that present colors (including the first light absorption pattern 230a formed of the same material as the first color filter CF1 on which the first low-reflection optical layer 200 is disposed).

[0128] refer to Figure 13 According to another embodiment of this disclosure, the first low-reflection optical layer 200 may include light absorption patterns 230b and 230c formed of the material of the remaining color filters CF3 and CF4, excluding the first color filter CF1 on which the first low-reflection optical layer 200 is disposed. Furthermore, the first low-reflection optical layer 200 may include a first TE reflection pattern 220a stacked on the light absorption patterns 230b and 230c, and a second TE reflection pattern 220b directly disposed on the first color filter CF1.

[0129] For example, the second TE reflective pattern 220b can add a red reflective color by reflecting external light that has passed through the first color filter CF1, on which the first low-reflectivity optical layer 200 is disposed. Furthermore, the second TE reflective pattern 220b can overlap with the first color filter CF1, and can add neutral reflective colors of red and blue overlap or red and green overlap by reflecting external light incident via light absorption patterns 230b and 230c, which transmit light of a different color than the first color filter CF1.

[0130] According to another embodiment of this disclosure, the first low-reflection optical layer 200 can improve the reflected color and visual perception of external light through light absorption patterns 230a, 230b, and 230c composed of a material comprising at least one of a plurality of color filters CF1, CF3, and CF4. Therefore, the light-emitting display device according to another embodiment of this disclosure can optimize the unit reflectivity of each of the sub-pixels SP1, SP2, SP3, and SP4, reduce reflection caused by external light, improve light extraction efficiency, and improve reflected color and visual perception.

[0131] Figure 14 A plurality of sub-pixels in a display panel according to another embodiment of the present disclosure are shown. Figure 15 According to another embodiment of this disclosure Figure 14 A sectional view taken from line IV-IV'. Figure 14 and Figure 15 It is shown in the reference Figures 1 to 13 The described embodiment of the light-emitting display device features modifications to the configuration and arrangement of the low-reflection optics. (Refer to...) Figure 14 and Figure 15In the following description, except for modified configurations, the same reference numerals will be used for the same parts, and redundant descriptions will be omitted or briefly described.

[0132] refer to Figure 14 and Figure 15 According to another embodiment of the present disclosure, the first low-reflection optical layer 200 may include a first-1 low-reflection optical layer 200a, a first-2 low-reflection optical layer 200b, a first-3 low-reflection optical layer 200c, and a first-4 low-reflection optical layer 200d, each made of a different material for each of the sub-pixels SP1, SP2, SP3, and SP4.

[0133] refer to Figure 15 According to another embodiment of the present disclosure, the first-1 low-reflection optical layer 200a, the first-2 low-reflection optical layer 200b, the first-3 low-reflection optical layer 200c and the first-4 low-reflection optical layer 200d can be disposed in each sub-pixel SP1, SP2, SP3 and SP4.

[0134] The first-1 low-reflection optical layer 200a may be disposed in the first sub-pixel SP1, and may include a second light absorption pattern 230b and a third light absorption pattern 230c made of materials of other color filters CF3 and CF4 besides the first color filter CF1. Furthermore, the first-1 low-reflection optical layer 200a may include a first TE reflection pattern 220a and a second TE reflection pattern 220b.

[0135] The first and second low-reflection optical layers 200b can be disposed on the second sub-pixel SP2 and can include a light absorption pattern 210 and a TE mode reflection pattern 220.

[0136] The first-third low-reflection optical layer 200c can be disposed on the third sub-pixel SP3, and can include a first light absorption pattern 230a and a third light absorption pattern 230c formed by the materials of color filters CF1 and CF4 other than the third color filter CF3.

[0137] The first-fourth low-reflection optical layer 200d can be disposed on the fourth sub-pixel SP4, and can include a first light absorption pattern 230a and a second light absorption pattern 230b formed by the materials of color filters CF1 and CF3 other than the fourth color filter CF4. Furthermore, the first-fourth low-reflection optical layer 200d can include a first TE reflection pattern 220a and a second TE reflection pattern 220b.

[0138] According to another embodiment of this disclosure, by providing a plurality of first low-reflection optical layers 200a, 200b, 200c, and 200d formed of different materials on each of the plurality of sub-pixels SP1, SP2, SP3, and SP4, the reflected color and visibility relative to external light can be optimally improved for each of the sub-pixels SP1, SP2, SP3, and SP4. Therefore, the light-emitting display device according to another embodiment of this disclosure can optimize the unit reflectivity of each of the sub-pixels SP1, SP2, SP3, and SP4, thereby improving light extraction efficiency while reducing reflection caused by external light, and optimally improving reflected color and visibility.

[0139] The following describes a light-emitting display device according to one or more embodiments of the present disclosure.

[0140] A light-emitting display device according to one or more embodiments of the present disclosure may include: a substrate, the substrate including a plurality of sub-pixels having light-emitting regions and non-light-emitting regions; a pixel circuit disposed in the non-light-emitting region on the substrate; at least one insulating layer disposed on the pixel circuit; and a color filter disposed on at least one insulating layer and corresponding to at least one of the plurality of sub-pixels, wherein one or more of the plurality of sub-pixels may include a low-reflection optical portion adjacent to or in contact with the color filter in the light-emitting region and having at least one transverse electric mode reflection pattern, i.e., a TE mode reflection pattern.

[0141] According to one or more embodiments of the present disclosure, at least one TE mode reflection pattern may include multiple TE mode reflection patterns, and the multiple TE mode reflection patterns may extend in a first direction of the light-emitting area or in a second direction intersecting the first direction, and may be arranged spaced apart from each other.

[0142] According to one or more embodiments of this disclosure, a plurality of TE mode reflection patterns can be configured such that the width of each TE mode reflection pattern or the distance between adjacent TE mode reflection patterns is less than the wavelength range of light of the corresponding sub-pixel.

[0143] According to one or more embodiments of this disclosure, the width of each TE mode reflection pattern or the distance between adjacent TE mode reflection patterns can be from 200 nm to 1000 nm.

[0144] According to one or more embodiments of this disclosure, the TE mode reflective pattern may contain conductive material or conductive organic material.

[0145] According to one or more embodiments of this disclosure, a low-reflection optics unit may be disposed on a color filter.

[0146] According to one or more embodiments of this disclosure, a low-reflection optics unit may be disposed between a color filter and a substrate.

[0147] According to one or more embodiments of this disclosure, the low-reflection optics may include a portion of at least one insulating layer.

[0148] According to one or more embodiments of the present disclosure, the low-reflection optics may include a first low-reflection optical layer disposed between the color filter and the substrate, and a second low-reflection optical layer disposed on the color filter, wherein the first low-reflection optical layer may include a portion of at least one insulating layer.

[0149] According to one or more embodiments of this disclosure, a low-reflection optics unit may be disposed in each of a plurality of sub-pixels.

[0150] According to one or more embodiments of this disclosure, the low-reflection optics can be configured to include a different material in each of a plurality of sub-pixels.

[0151] According to one or more embodiments of the present disclosure, at least one of the plurality of sub-pixels may be a white sub-pixel without a color filter, and a low-reflection optical element may be disposed on at least one insulating layer corresponding to the white sub-pixel, and may have the same or different height as the color filter between other sub-pixels adjacent to the white sub-pixel.

[0152] According to one or more embodiments of the present disclosure, a low-reflection optics unit may include: a first low-reflection optical layer, in which a plurality of TE mode reflection patterns are arranged along a first direction or a second direction intersecting the first direction, the first low-reflection optical layer including a protective layer supporting the plurality of TE mode reflection patterns; and a second low-reflection optical layer disposed on the first low-reflection optical layer and having phase delay characteristics.

[0153] According to one or more embodiments of this disclosure, the phase delay value of the second low-reflection optical layer may be λ / 4.

[0154] According to one or more embodiments of the present disclosure, the first low-reflection optical layer may further include a light-absorbing pattern corresponding to each of the plurality of TE mode reflection patterns and having light-absorbing characteristics, and the light-absorbing pattern may be disposed below the TE mode reflection pattern.

[0155] According to one or more embodiments of this disclosure, the light-absorbing pattern may comprise a light-absorbing material or a black material.

[0156] According to one or more embodiments of the present disclosure, the first low-reflection optical layer may include a portion having a TE mode reflection pattern and a portion having a light absorption pattern and a TE mode reflection pattern stacked on top of each other.

[0157] According to one or more embodiments of this disclosure, the light absorption pattern may contain the same color filter material as the color filter corresponding to each of the plurality of sub-pixels.

[0158] According to one or more embodiments of this disclosure, the plurality of sub-pixels may include a white sub-pixel without a color filter, a red sub-pixel emitting red light, a blue sub-pixel emitting blue light, and a green sub-pixel emitting green light, and the first low-reflection optical layer may include at least one of the following portions: a portion having a TE mode reflection pattern; a portion having a light absorption pattern of a material having a TE mode reflection pattern and a color filter containing a red sub-pixel stacked on top of it; a portion having a light absorption pattern of a material having a TE mode reflection pattern and a color filter containing a blue sub-pixel stacked on top of it; and a portion having a light absorption pattern of a material having a TE mode reflection pattern and a color filter containing a green sub-pixel stacked on top of it.

[0159] According to one or more embodiments of this disclosure, a first low-reflection optical layer corresponding to each of the red, blue, and green sub-pixels may include a light absorption pattern of a material containing at least one color filter, a light absorption pattern of a material containing all color filters except the color filter corresponding to the respective sub-pixel, or a light absorption pattern of a material containing all color filters.

[0160] The features, structures, and effects described above in this disclosure are included in at least one embodiment of this disclosure, but are not limited to only one embodiment. Furthermore, the features, structures, and effects described in at least one embodiment of this disclosure can be implemented by those skilled in the art through combinations or modifications of other embodiments. Therefore, anything associated with combinations and modifications should be interpreted as being within the scope of this disclosure.

[0161] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from its spirit or scope. Therefore, this disclosure is intended to cover such modifications and variations as long as they fall within the scope of the appended claims and their equivalents.

Claims

1. A light-emitting display device, comprising: A substrate, the substrate comprising a plurality of sub-pixels having light-emitting regions and non-light-emitting regions; A pixel circuit, wherein the pixel circuit is disposed in the non-light-emitting area on the substrate; At least one insulating layer is disposed on the pixel circuit; as well as A color filter is disposed on the at least one insulating layer and corresponds to at least one of the plurality of sub-pixels. One or more of the plurality of sub-pixels include a low-reflection optical element, which is adjacent to or in contact with the color filter in the light-emitting area and has at least one lateral electrical mode reflection pattern, i.e., a TE mode reflection pattern.

2. The light-emitting display device according to claim 1, wherein, The at least one TE mode reflection pattern includes multiple TE mode reflection patterns that extend in a first direction of the luminescent area or in a second direction intersecting the first direction and are spaced apart from each other.

3. The light-emitting display device according to claim 2, wherein, The plurality of TE mode reflection patterns are configured such that the width of each TE mode reflection pattern or the distance between adjacent TE mode reflection patterns is less than the wavelength range of the light of the corresponding sub-pixel.

4. The light-emitting display device according to claim 3, wherein, The width of each TE mode reflection pattern or the distance between adjacent TE mode reflection patterns is 200 nm to 1000 nm.

5. The light-emitting display device according to claim 1, wherein, The TE mode reflection pattern contains conductive material.

6. The light-emitting display device according to claim 1, wherein, The low-reflection optics are disposed on the color filter.

7. The light-emitting display device according to claim 1, wherein, The low-reflection optical component is disposed between the color filter and the substrate.

8. The light-emitting display device according to claim 7, wherein, The low-reflection optics includes a portion of the at least one insulating layer.

9. The light-emitting display device according to claim 1, wherein, The low-reflection optical component includes: A first low-reflection optical layer disposed between the color filter and the substrate; and A second low-reflection optical layer is disposed on the color filter. The first low-reflection optical layer includes a portion of the at least one insulating layer.

10. The light-emitting display device according to claim 1, wherein, The low-reflection optics are disposed in each of the plurality of sub-pixels.

11. The light-emitting display device according to claim 10, wherein, The low-reflection optics are configured such that each of the plurality of sub-pixels contains a different material.

12. The light-emitting display device according to claim 1, wherein, At least one of the plurality of sub-pixels is a white sub-pixel without the color filter applied, and The low-reflection optical element is disposed on at least one insulating layer corresponding to the white sub-pixel, and has the same or different height as the color filter between other sub-pixels adjacent to the white sub-pixel.

13. The light-emitting display device according to claim 1, wherein, The low-reflection optical component includes: A first low-reflection optical layer, wherein a plurality of TE mode reflection patterns are arranged along a first direction or a second direction intersecting the first direction, and the first low-reflection optical layer includes a protective layer supporting the plurality of TE mode reflection patterns; and A second low-reflection optical layer is disposed on the first low-reflection optical layer and has phase delay characteristics.

14. The light-emitting display device according to claim 13, wherein, The phase delay value of the second low-reflection optical layer is λ / 4.

15. The light-emitting display device according to claim 13, wherein, The first low-reflection optical layer further includes a light-absorbing pattern corresponding to each of the plurality of TE mode reflection patterns and having light-absorbing characteristics, and The light absorption pattern is positioned below the TE mode reflection pattern.

16. The light-emitting display device according to claim 15, wherein, The light-absorbing pattern comprises light-absorbing material or black material.

17. The light-emitting display device according to claim 15, wherein, The first low-reflection optical layer includes a portion having the TE mode reflection pattern and a portion having the light absorption pattern and the TE mode reflection pattern stacked on top of each other.

18. The light-emitting display device according to claim 15, wherein, The light absorption pattern contains the same color filter material as the color filter corresponding to each of the plurality of sub-pixels.

19. The light-emitting display device according to claim 18, wherein, The plurality of sub-pixels includes a white sub-pixel without the color filter, a red sub-pixel emitting red light, a blue sub-pixel emitting blue light, and a green sub-pixel emitting green light. The first low-reflection optical layer includes at least one of the following: The portion containing the TE mode reflection pattern; A portion of a material having the TE mode reflection pattern and a light absorption pattern of a color filter containing the red sub-pixels stacked on top of it; A portion of a material having the TE mode reflection pattern and a light absorption pattern of a color filter containing the blue sub-pixels stacked on top of each other; and A portion of the material having the TE mode reflection pattern and the light absorption pattern of the material containing the green sub-pixels stacked together.

20. The light-emitting display device according to claim 19, wherein, The first low-reflection optical layer corresponding to each of the red sub-pixel, the blue sub-pixel, and the green sub-pixel includes: a light absorption pattern of a material containing at least one color filter, a light absorption pattern of a material containing the remaining color filters other than the color filter corresponding to each sub-pixel, or a light absorption pattern of a material containing all the color filters.

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