Display device

Abstract

An embodiment provides a display device including a light functional layer disposed on a substrate, the light functional layer including: a bank having an opening; and a first light scattering pattern, a first sub-light conversion pattern, a second light scattering pattern, and a second sub-light conversion pattern sequentially disposed in a first of the openings, and each of the first sub-light conversion pattern and the second sub-light conversion pattern has a thickness greater than a thickness of each of the first light scattering pattern and the second light scattering pattern.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0036576 filed in the Korean Intellectual Property Office on March 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device. Background Art

[0004] With the development of information technology, the importance of display devices as a connection medium between users and information has emerged. Therefore, the use of display devices such as liquid crystal display devices, organic light emitting display devices, and inorganic light emitting display devices is increasing.

[0005] A display device can convert the color of light output from a light-emitting element. Methods for improving conversion efficiency may be needed.

[0006] It will be understood that this background section is intended, in part, to provide a useful background for understanding the technology. However, this background section may also include ideas, concepts, or insights that were not known or understood by those skilled in the relevant art before the corresponding effective filing date of the subject matter disclosed herein. Summary of the Invention

[0007] An object of the present disclosure is to provide a display device with improved light conversion efficiency and a display system including the same.

[0008] The display device may include an optical functional layer arranged on a substrate, wherein the optical functional layer includes: a dam having a plurality of openings, and a first light scattering pattern, a first sub-light conversion pattern, a second light scattering pattern, and a second sub-light conversion pattern, sequentially arranged in a first opening of the plurality of openings, and a thickness of each of the first sub-light conversion pattern and the second sub-light conversion pattern is greater than a thickness of each of the first light scattering pattern and the second light scattering pattern.

[0009] The display device may further include a display element layer arranged between the substrate and the optical functional layer, wherein the display element layer may include a first light-emitting element, a second light-emitting element, and a third light-emitting element corresponding to the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively, the first light scattering pattern may scatter the first reference light emitted from the first light-emitting element to provide the first reference light to the first sub-light conversion pattern, the first sub-light conversion pattern may convert the color of the first light which is a part of the first reference light, and the second light scattering pattern may provide the second light which is the remaining part of the first reference light to the first sub-light conversion pattern and the second sub-light conversion pattern.

[0010] The second light may be light that is not converted by the first sub-light conversion pattern.

[0011] The second light scattering pattern may provide first sub-light, which is a portion of the second light, to the first sub-light conversion pattern, and may provide second sub-light, which is a remaining portion of the second light, to the second sub-light conversion pattern.

[0012] The second sub-light conversion pattern can convert the color of the second sub-light.

[0013] The second sub-light conversion pattern may convert the color of the light of the first sub-light that is not converted by the first sub-light conversion pattern.

[0014] Another first light scattering pattern, another first sub-light conversion pattern, another second light scattering pattern and another second sub-light conversion pattern can be sequentially arranged in the second opening of the multiple openings, and the first opening can correspond to the first sub-pixel, the second opening can correspond to the second sub-pixel, and the thickness of the first light scattering pattern and the second light scattering pattern arranged in the first opening can be different from the thickness of the other first light scattering pattern and the other second light scattering pattern arranged in the second opening.

[0015] The thickness of the first and second sub-light conversion patterns disposed in the first opening may be different from the thickness of another first and second sub-light conversion patterns disposed in the second opening.

[0016] A passivation layer may be disposed on the bank and the second sub-light conversion pattern.

[0017] A low refractive index layer may be provided on the passivation layer.

[0018] The embankment may include a first sub-embankment and a second sub-embankment arranged on the first sub-embankment, the width of the first sub-embankment in the first direction may be greater than the width of the second sub-embankment in the first direction, and the first direction may be the direction along which the first sub-pixel to the third sub-pixel are arranged.

[0019] The number of scattering particles included in the first light scattering pattern may be smaller than the number of scattering particles included in the second light scattering pattern.

[0020] The refractive index of the first light scattering pattern may be about 1.5 or less, and the refractive index of the second light scattering pattern may be about 1.5 or more.

[0021] The thicknesses of the first light scattering pattern, the first sub-light conversion pattern, the second light scattering pattern, and the second sub-light conversion pattern may be different.

[0022] An embodiment may include a display device comprising a light-functional layer disposed on a substrate, wherein the light-functional layer comprises: a dam having a plurality of openings; and a first sub-light-conversion pattern, a light-scattering pattern, and a second sub-light-conversion pattern sequentially disposed in a first opening of the plurality of openings, and a thickness of each of the first sub-light-conversion pattern and the second sub-light-conversion pattern is greater than a thickness of the light-scattering pattern.

[0023] The display device may further include a display element layer arranged between the substrate and the optical functional layer, wherein the display element layer may include a first light-emitting element, a second light-emitting element, and a third light-emitting element corresponding to the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively, the first sub-light conversion pattern may convert the color of the first light which is a part of the first reference light emitted from the first light-emitting element, and the light scattering pattern may provide the second light which is the remaining part of the first reference light to the first sub-light conversion pattern and the second sub-light conversion pattern.

[0024] The second light may be light that is not converted by the first sub-light conversion pattern.

[0025] The light scattering pattern may provide first sub-light that is a portion of the second light to the first sub-light conversion pattern, and may provide second sub-light that is a remaining portion of the second light to the second sub-light conversion pattern.

[0026] The second sub-light conversion pattern may convert the colors of the second sub-light and the first sub-light that are not converted by the first sub-light conversion pattern.

[0027] An embodiment may include: a processor that provides image data and a control signal; and a display device that includes a display panel to display an image corresponding to the image data in response to the control signal, wherein the display panel includes a light-functional layer disposed on a substrate, and the light-functional layer includes: a dam having a plurality of openings; and a first light scattering pattern, a first sub-light conversion pattern, a second light scattering pattern, and a second sub-light conversion pattern that are sequentially disposed in a first opening of the plurality of openings; and a thickness of each of the first sub-light conversion pattern and the second sub-light conversion pattern is greater than a thickness of each of the first light scattering pattern and the second light scattering pattern.

[0028] The display device can return light without converting its color, thereby improving light conversion efficiency and reducing power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other aspects and features of the present disclosure will become more apparent by describing in detail embodiments of the present disclosure with reference to the attached drawings.

[0030] Figure 1 A block diagram of a display device according to an embodiment is shown.

[0031] Figure 2 Shown according to the embodiment Figure 1 Block diagram of a sub-pixel.

[0032] Figure 3 Shown according to the embodiment Figure 1 Schematic top plan view of a display panel.

[0033] Figure 4 Shown according to the embodiment Figure 3 Schematic cross-sectional view of a display panel.

[0034] Figure 5 Shown according to the embodiment Figure 3 Schematic cross-sectional view of a display panel.

[0035] Figure 6 Shown according to the embodiment Figure 3 Schematic top plan view of one of the pixels.

[0036] Figure 7 Shown along Figure 6 Schematic cross-sectional view taken along line II'.

[0037] Figure 8 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0038] Figure 9 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0039] Figure 10 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0040] Figure 11 A block diagram of a display system according to an embodiment is shown.

[0041] Figures 12 to 15 Shown Figure 11 A schematic perspective view of an application example of a display system. DETAILED DESCRIPTION

[0042] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The following description is intended to provide an understandable disclosure, and any other disclosure may be omitted to avoid blurring the scope of the present disclosure. The present disclosure can be implemented in different forms and is not limited to the embodiments set forth herein. The embodiments described herein are provided for the purpose of describing the present disclosure in sufficient detail to enable those skilled in the art to easily practice the present disclosure.

[0043] Throughout the specification, when it is described that one element is “connected” to another element, this includes not only “direct connection” but also “indirect connection” with another device therebetween. The terms used herein are for the purpose of describing the embodiments and are not intended to limit the scope of the present disclosure.

[0044] In the drawings, the size, thickness, ratio, and dimensions of elements may be exaggerated for convenience of description and clarity. The same reference numerals denote the same elements throughout.

[0045] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0046] In the specification and claims, for the purposes of its meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in conjunction or antonym conjunction sense and may be understood to be equivalent to "and / or".

[0047] Throughout the specification, unless explicitly described to the contrary, the terms “comprises,” “comprising,” “includes,” and / or “including,” “has,” “have,” and / or “having,” and variations thereof, when used in this specification, indicate the presence of stated features, integers, steps, operations, elements, parts, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups thereof.

[0048] The term "overlap" or "overlapping" means that a first object can be above or below a second object, or to one side of the second object, and means that a second object can be above or below a first object, or to one side of the first object. Additionally, the term "overlap" may include stacking, stacking, facing, extending across, covering, or partially covering, or any other suitable term as would be appreciated and understood by one of ordinary skill in the art.

[0049] The terms "facing" and "facing" mean that the first element can be directly or indirectly opposite to the second element. In the case where a third element is interposed between the first and second elements, the first and second elements can be understood as being indirectly opposite to each other, but still facing each other.

[0050] When an element is described as “not overlapping” or “so as not to “overlap” another element, this can include the elements being spaced apart from each other, offset from each other, or positioned alongside each other, or any other suitable terminology as would be appreciated and understood by one of ordinary skill in the art.

[0051] For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z (such as, for example, XYZ, XY, YZ, and XZ). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0052] Although the terms first, second, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, without departing from the teachings of the present disclosure, the first component discussed below may be referred to as the second component.

[0053] For descriptive purposes, spatially relative terms such as "below," "beneath," "lower," "above," "upper," etc. may be used herein and thereby describe the relationship of one element or feature to another element or feature as shown in the accompanying drawings. In addition to the orientations described in the accompanying drawings, spatially relative terms are intended to also cover different orientations of the device in use, operation, and / or manufacture. For example, if the device in the accompanying drawings is turned over, elements or features described as being "below" or "below" other elements or features will then be oriented "above" the other elements or features. Thus, the term "below" can include both above and below orientations. Furthermore, the device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and thus, the spatially relative descriptors used herein should be interpreted accordingly.

[0054] Various embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of a given embodiment. Thus, deviations from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, the embodiments disclosed herein should not be construed as limited to the shapes of the regions illustrated, but are to include deviations in shapes due to, for example, manufacturing. Therefore, the regions illustrated in the figures are schematic in nature, and their shapes are not intended to indicate the actual shape of a region of a device and are not intended to be limiting.

[0055] As used herein, "about" or "approximately" are inclusive of the stated value and mean within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, in view of the measurements in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0056] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. It will also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted as idealized or overly formal unless expressly so defined herein.

[0057] Figure 1 A block diagram of a display device according to an embodiment is shown.

[0058] refer to Figure 1 , the display device DD may include a display panel DP, a gate driver 120 , a data driver 130 , a voltage generator 140 , and a controller 150 .

[0059] The display panel DP may include subpixels SP. The subpixels SP may be connected to the gate driver 120 through first to m-th gate lines GL1 to GLm. The subpixels SP may be connected to the data driver 130 through first to n-th data lines DL1 to DLn.

[0060] The sub-pixels SP may generate light of two or more colors. For example, within the spirit and scope of the present disclosure, the sub-pixels SP may each generate light of one color (such as red, green, blue, cyan, magenta, yellow, etc.).

[0061] Two or more of the sub-pixels SP may constitute one pixel PXL. For example, the pixel PXL may include: Figure 1 Thus, the pixel PXL may emit light of various colors and various brightness depending on a combination of light emitted from the sub-pixels SP included in the pixel PXL.

[0062] The gate driver 120 is connected to the sub-pixels SP arranged (or disposed) in the row direction through the first gate line GL1 to the m-th gate line GLm. The gate driver 120 can output gate signals to the first gate line GL1 to the m-th gate line GLm in response to the gate control signal GCS. In an embodiment, within the spirit and scope of the present disclosure, the gate control signal GCS may include a start signal indicating the start of each frame, a horizontal synchronization signal, etc.

[0063] The gate driver 120 may be provided on one side of the display panel DP. However, embodiments are not limited thereto. For example, the gate driver 120 may be divided into two or more physically and / or logically separate drivers, and the drivers may be provided on one side of the display panel DP and on the other side of the display panel DP opposite to the one side. As described above, the gate driver 120 may be provided around the display panel DP in various forms according to embodiments.

[0064] The data driver 130 is connected to the sub-pixels SP arranged in the column direction via the first to nth data lines DL1 to DLn. The data driver 130 receives image data DATA and a data control signal DCS from the controller 150. The data driver 130 operates in response to the data control signal DCS. In embodiments, within the spirit and scope of the present disclosure, the data control signal DCS may include a source start signal, a source shift clock, a source output enable signal, and the like.

[0065] The data driver 130 may receive a voltage from the voltage generator 140. The data driver 130 may use the received voltage to apply a data signal having a grayscale voltage corresponding to the image data DATA to the first to nth data lines DL1 to DLn. While applying a gate signal to each of the first to mth gate lines GL1 to GLm, a data signal corresponding to the image data DATA may be applied to the data lines DL1 to DLn. Thus, the subpixels SP may generate light corresponding to the data signals, and the display panel DP may display an image.

[0066] In an implementation, the gate driver 120 and the data driver 130 may include complementary metal oxide semiconductor (CMOS) circuit elements.

[0067] The voltage generator 140 may operate in response to a voltage control signal VCS from the controller 150. The voltage generator 140 is configured to generate a voltage and provide the generated voltage to components of the display device DD, such as the gate driver 120, the data driver 130, and the controller 150. The voltage generator 140 may generate a voltage by receiving an input voltage from outside the display device DD and regulating the received voltage.

[0068] The voltage generator 140 may generate a first power voltage and a second power voltage. The generated first power voltage and second power voltage may be provided to the subpixel SP via the power line PL. In other embodiments, at least one of the first power voltage and the second power voltage may be provided from outside the display device DD.

[0069] The voltage generator 140 can provide various voltages and / or signals. For example, the voltage generator 140 can provide one or more initialization voltages applied to the sub-pixels SP. For example, during a sensing operation for sensing electrical characteristics of the transistors and / or light-emitting elements of the sub-pixels SP, a selectable reference voltage can be applied to the first to nth data lines DL1 to DLn, and the voltage generator 140 can generate the reference voltages for transmission to the data driver 130. For example, during a display operation for displaying an image on the display panel DP, a common pixel control signal can be applied to the sub-pixels SP, and the voltage generator 140 can generate the pixel control signal. In an embodiment, the voltage generator 140 can provide the pixel control signal to the sub-pixels SP via the pixel control lines PXCL. Figure 1 The pixel control line PXCL is shown as being connected between the voltage generator 140 and the display panel DP, but embodiments are not limited thereto. For example, the pixel control line PXCL may be connected between the gate driver 120 and the display panel DP. In this case, the pixel control signal may be transmitted from the voltage generator 140 to the pixel control line PXCL via the gate driver 120.

[0070] The controller 150 controls various operations of the display device DD. The controller 150 receives input image data IMG and a control signal CTRL corresponding thereto from the outside. The controller 150 may provide a gate control signal GCS, a data control signal DCS, and a voltage control signal VCS in response to the control signal CTRL.

[0071] The controller 150 may convert the input image data IMG into a format suitable for the display device DD or the display panel DP to output the image data DATA. In an embodiment, the controller 150 may output the image data DATA by aligning the input image data IMG to be suitable for the sub-pixels SP in row units.

[0072] Two or more components of the data driver 130, the voltage generator 140, and the controller 150 may be mounted on one integrated circuit. Figure 1 As shown, the data driver 130, the voltage generator 140, and the controller 150 may be included in a driver integrated circuit DIC. In this case, the data driver 130, the voltage generator 140, and the controller 150 may be functionally separated components within the driver integrated circuit DIC or therein. In other embodiments, at least one of the data driver 130, the voltage generator 140, and the controller 150 may be provided as a component separate from the driver integrated circuit DIC.

[0073] Figure 2 Shown according to the embodiment Figure 1 A block diagram of a sub-pixel. Figure 2 In the Figure 1 The sub-pixel SPij arranged in the i-th row (i is an integer greater than or equal to 1 and less than or equal to m) and the j-th column (j is an integer greater than or equal to 1 and less than or equal to n) among the sub-pixels SP is taken as an example.

[0074] refer to Figure 2 , the sub-pixel SPij may include a sub-pixel circuit SPC and a light emitting element LD.

[0075] The light emitting element LD is connected between a first power voltage node VDDN and a second power voltage node VSSN. The first power voltage node VDDN is connected to Figure 1 One of the power lines PL in the circuit receives the first power voltage. The second power voltage node VSSN is connected to Figure 1 Another one of the power lines PL in the circuit is connected to receive the second power voltage. The first power voltage may have a higher voltage level than the second power voltage.

[0076] The light-emitting element LD is connected between the anode electrode AE ​​and the cathode electrode CE. The anode electrode AE ​​may be connected to a first power voltage node VDDN via a sub-pixel circuit SPC. For example, the anode electrode AE ​​may be connected to the first power voltage node VDDN via one or more transistors included in the sub-pixel circuit SPC. The cathode electrode CE may be connected to a second power voltage node VSSN. The light-emitting element LD is configured to emit light in response to a current flowing from the anode electrode AE ​​to the cathode electrode CE.

[0077] The sub-pixel circuit SPC can be connected to Figure 1 The i-th gate line GLi and the m-th gate line GLm among the first gate line GL1 to the m-th gate line GLm Figure 1 In response to the gate signal received through the i-th gate line GLi, the sub-pixel circuit SPC controls the light emitting element LD to emit light according to the data signal received through the j-th data line DLj. In an embodiment, the sub-pixel circuit SPC may be further connected to Figure 1 In this case, the sub-pixel circuit SPC may further control the light emitting element LD in response to a pixel control signal received through the pixel control line PXCL.

[0078] For these operations, the sub-pixel circuit SPC may include circuit elements such as a transistor and one or more capacitors.

[0079] The transistors of the sub-pixel circuit SPC may include P-type transistors and / or N-type transistors. In an embodiment, the transistors of the sub-pixel circuit SPC may include metal oxide silicon field effect transistors (MOSFETs). In an embodiment, the transistors of the sub-pixel circuit SPC may include amorphous silicon semiconductors, single crystal silicon semiconductors, polycrystalline silicon semiconductors, and oxide semiconductors.

[0080] Figure 3 Shown according to the embodiment Figure 1 Schematic top plan view of a display panel.

[0081] refer to Figure 3 The display panel DP may include a display area DA and a non-display area NDA. The display panel DP displays an image through the display area DA. The non-display area NDA is disposed around the display area DA.

[0082] The display panel DP may include subpixels SP in a display area DA. The subpixels SP may be arranged along a first direction DR1 and a second direction DR2 intersecting the first direction DR1. For example, the subpixels SP may be arranged in a matrix format along the first direction DR1 and the second direction DR2. As another example, the subpixels SP may be arranged in a zigzag pattern along the first direction DR1 and the second direction DR2. In embodiments, the arrangement of the subpixels SP may vary. The first direction DR1 may be a row direction, and the second direction DR2 may be a column direction.

[0083] Two or more of the sub-pixels SP may constitute one pixel PXL. Figure 3 The pixel PXL is shown to include three sub-pixels SP1 to SP3, but the embodiment is not limited thereto. For example, the pixel PXL may include two sub-pixels. Hereinafter, for better understanding and ease of description, it is assumed that the pixel PXL includes first to third sub-pixels SP1 to SP3.

[0084] Each of the first to third subpixels SP1 to SP3 can generate one of various colors such as red, green, blue, cyan, magenta, and yellow. Hereinafter, for the sake of clarity and simplicity of description, it is assumed that the first subpixel SP1 is configured to generate red light, the second subpixel SP2 is configured to generate green light, and the third subpixel SP3 is configured to generate blue light.

[0085] Each of the first to third subpixels SP1 to SP3 may include at least one light-emitting element configured to generate light. In an embodiment, the light-emitting elements of the first to third subpixels SP1 to SP3 may generate light of the same color. For example, the light-emitting elements of the first to third subpixels SP1 to SP3 may generate blue light. In other embodiments, the light-emitting elements of the first to third subpixels SP1 to SP3 may generate light of different colors. For example, the light-emitting elements of the first to third subpixels SP1 to SP3 may generate red light, green light, and blue light, respectively.

[0086] As the display panel DP, a self-luminous display panel such as an LED display panel using micron-sized or nano-sized light emitting diodes as light emitting elements and an organic light emitting display panel using organic light emitting diodes as light emitting elements may be used.

[0087] Constituent elements for controlling the sub-pixel SP may be provided in the non-display area NDA. Wiring (eg, Figure 1 As shown, first to m-th gate lines GL1 to GLm, first to n-th data lines DL1 to DLn, power lines PL, and pixel control lines PXCL may be disposed in the non-display area NDA.

[0088] Figure 1 At least one of the gate driver 120, the data driver 130, the voltage generator 140, and the controller 150 in the display panel DP may be provided in the non-display area NDA of the display panel DP. In an embodiment, the gate driver 120 may be provided in the non-display area NDA. In this case, the data driver 130, the voltage generator 140, and the controller 150 may be implemented as a separate device from the display panel DP. Figure 1 The driver integrated circuit DIC is provided, and the driver integrated circuit DIC may be connected to wiring provided in the non-display area NDA. In other embodiments, the gate driver 120 may be implemented as one integrated circuit separate from the display panel DP together with the data driver 130, the voltage generator 140, and the controller 150.

[0089] In an embodiment, the display area DA may have various shapes. The display area DA may have a closed loop shape including straight and / or curved sides. For example, the display area DA may have a shape such as a polygonal shape, a circular shape, a semicircular shape, and an elliptical shape.

[0090] In an embodiment, the display panel DP may have a flat display surface. In other embodiments, the display panel DP may have a display surface that is at least partially rounded. In an embodiment, the display panel DP may be bendable, foldable, or rollable. In these cases, the display panel DP and / or the substrate of the display panel DP may include a material having flexible properties.

[0091] Figure 4 Shown according to the embodiment Figure 3 Schematic cross-sectional view of a display panel.

[0092] refer to Figure 4 The display panel DP may include a substrate SUB, and a pixel circuit layer PCL, a display element layer DPL, and a light function layer LFL sequentially stacked on the substrate SUB in a third direction DR3 crossing (or intersecting) the first direction DR1 and the second direction DR2.

[0093] The substrate SUB may be made of an insulating material such as glass or resin. For example, the substrate SUB may include a glass substrate. As another example, the substrate SUB may include a polyimide (PI) substrate. As another example, the substrate SUB may include a silicon wafer substrate formed using a semiconductor process.

[0094] In an embodiment, the substrate SUB may be made of a bendable or foldable flexible material and may have a single-layer structure or a multi-layer structure. For example, the flexible material may include at least one of polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate, and cellulose acetate propionate. However, the embodiment is not limited thereto.

[0095] The pixel circuit layer PCL is disposed on the substrate SUB. The pixel circuit layer PCL may include an insulating layer and a semiconductor pattern and a conductive pattern disposed between the insulating layers. Within the spirit and scope of the present disclosure, the conductive pattern of the pixel circuit layer PCL may be used as a circuit element, wiring, etc.

[0096] The circuit elements of the pixel circuit layer PCL may include Figure 3 The sub-pixel circuit SPC of each of the sub-pixels SP (see Figure 2 ). In other words, the circuit elements of the pixel circuit layer PCL may be configured as transistors and one or more capacitors of the sub-pixel circuit SPC.

[0097] The wirings of the pixel circuit layer PCL may include wirings connected to the sub-pixels SP. The wirings of the pixel circuit layer PCL may include various signal lines and / or voltage lines required to drive the display element layer DPL.

[0098] The display element layer DPL is disposed on the pixel circuit layer PCL and may include a light emitting element of a sub-pixel SP.

[0099] The light-function layer LFL may be disposed on the display element layer DPL. The light-function layer LFL may include a light-conversion pattern having color-conversion particles and / or scattering particles. For example, the color-conversion particles may include quantum dots. The quantum dots may change the wavelength (or color) of light emitted from the display element layer DPL. The light-function layer LFL may also include a light-scattering pattern having scattering particles. In embodiments, the light-conversion pattern and the light-scattering pattern may be omitted.

[0100] The light function layer LFL may further include a color filter layer including a color filter. The color filter may selectively transmit light of a given wavelength (or a given color). In an embodiment, the color filter layer may be omitted.

[0101] A window for protecting the exposed surface (or upper surface) of the display panel DP may be provided on the optical functional layer LFL. The window may protect the display panel DP from external impacts. The window may be coupled or connected to the optical functional layer LFL via an optically transparent adhesive (bonding) member. The window may have a multilayer structure selected from a glass substrate, a plastic film, and a plastic substrate. The multilayer structure may be formed by a continuous process or a bonding process using an adhesive layer. All or a portion of the window may be flexible.

[0102] Figure 5 Shown according to the embodiment Figure 3 Schematic cross-sectional view of a display panel.

[0103] refer to Figure 5 The display panel DP' may include a substrate SUB, a pixel circuit layer PCL, a display element layer DPL, an input sensing layer ISL and a light function layer LFL. The substrate SUB, the pixel circuit layer PCL, the display element layer DPL and the light function layer LFL are arranged with reference to FIG. Figure 4 The substrate SUB, the pixel circuit layer PCL, the display element layer DPL, and the light function layer LFL are configured in the same manner as described above, and redundant description thereof will be omitted hereinafter.

[0104] The input sensing layer ISL may detect user input on the upper surface (or display surface) of the display panel DP'. The input sensing layer ISL may include components adapted to sense external objects such as a user's hand or a pen. For example, the input sensing layer ISL may include touch electrodes.

[0105] Figure 6 Shown according to the embodiment Figure 3 Schematic top plan view of one of the pixels.

[0106] refer to Figure 6 , the pixel PXL may include first to third subpixels SP1 to SP3. The first to third subpixels SP1 to SP3 may be arranged in a first direction DR1. However, the arrangement of the pixel PXL is not limited thereto and may be variously changed in embodiments. For example, the first to third subpixels SP1 to SP3 may be arranged in a zigzag pattern.

[0107] The first to third anode electrodes AE1 to AE3 may be provided in the first to third sub-pixels SP1 to SP3, respectively. The first anode electrode AE1 may be provided to be connected to the sub-pixel circuit SPC (see Figure 2 ) of the anode electrode AE ​​(see Figure 2 The second anode electrode AE2 may be provided to be connected to the anode electrode AE ​​of the sub-pixel circuit SPC of the second sub-pixel SP2. The third anode electrode AE3 may be provided to be connected to the anode electrode AE ​​of the sub-pixel circuit SPC of the third sub-pixel SP3.

[0108] The cathode electrode CE may be spaced apart from the first to third anode electrodes AE1 to AE3. The cathode electrode CE may be disposed at the same height as the first to third anode electrodes AE1 to AE3. The cathode electrode CE may be spaced apart from the first to third anode electrodes AE1 to AE3 in the second direction DR2. In an embodiment, the cathode electrode CE may extend in the first direction DR1 and may serve as a common electrode for the pixel PXL and other pixels adjacent to the pixel PXL. Although not shown, the cathode electrode CE extends not only in the first direction DR1 but also in the second direction DR2 and may serve as a common electrode for the pixel PXL. Figure 3 Thus, the cathode electrode CE may have various shapes.

[0109] The first to third light emitting elements LD1 to LD3 may be provided on the first to third anode electrodes AE1 to AE3 and the cathode electrode CE. The first light emitting element LD1 may be electrically connected to the first anode electrode AE1 and the cathode electrode CE. The first light emitting element LD1 may be provided as a light emitting element LD connected to the sub-pixel circuit SPC of the first sub-pixel SP1 (see Figure 2). The second light-emitting element LD2 may be electrically connected to the second anode electrode AE2 and the cathode electrode CE. The second light-emitting element LD2 may be provided as the light-emitting element LD connected to the sub-pixel circuit SPC of the second sub-pixel SP2. The third light-emitting element LD3 may be electrically connected to the third anode electrode AE3 and the cathode electrode CE. The third light-emitting element LD3 may be provided as the light-emitting element LD connected to the sub-pixel circuit SPC of the third sub-pixel SP3.

[0110] The first light emitting element LD1, the second light emitting element LD2, and the third light emitting element LD3 may be inorganic light emitting diodes including an inorganic light emitting material. However, the embodiment is not limited thereto, and for example, an organic light emitting diode may be used.

[0111] Figure 7 Shown along Figure 6 Schematic cross-sectional view taken along line II'.

[0112] refer to Figure 6 and Figure 7 , the pixel circuit layer PCL, the display element layer DPL, and the light function layer LFL may be sequentially disposed on the substrate SUB.

[0113] In the pixel circuit layer PCL, sub-pixel circuits SPC corresponding to the first to third sub-pixels SP1 to SP3 are provided (see Figure 2 ).

[0114] As reference Figure 2 As described above, the sub-pixel circuit SPC of each of the first to third sub-pixels SP1 to SP3 (see Figure 2 ) may include transistors and one or more capacitors. The semiconductor pattern and the conductive pattern of the pixel circuit layer PCL may be used as the transistor and the capacitor of the sub-pixel circuit SPC. The conductive pattern of the pixel circuit layer PCL may further be used as wiring, for example, Figure 1 The first to m-th gate lines GL1 to GLm, the first to n-th data lines DL1 to DLn, the power lines PL and the pixel control lines PXCL are shown in FIG.

[0115] The display element layer DPL may be disposed on the pixel circuit layer PCL.

[0116] The display element layer DPL may include first to third anode electrodes AE1 to AE3 (see Figure 6 ), cathode electrode CE (see Figure 6 ), a first bank BNK1, and first to third light emitting elements LD1 to LD3, an overcoat layer OCL, a first passivation layer PSV1, and a capping layer CPL.

[0117] The first to third light emitting elements LD1 to LD3 may be provided on the pixel circuit layer PCL to correspond to the first to third sub-pixels SP1 to SP3, respectively. By way of non-limiting example, the first light emitting element LD1 is connected between the cathode electrode CE and the sub-pixel circuit SPC included in the first sub-pixel SP1 (see FIG. Figure 2 The second light emitting element LD2 is connected between the cathode electrode CE and the sub-pixel circuit SPC included in the second sub-pixel SP2 (see Figure 2 ) between the transistors in the third sub-pixel SP3. The third light emitting element LD3 is connected to the cathode electrode CE and the sub-pixel circuit SPC (see Figure 2 ) between the transistors in .

[0118] The first bank BNK1 may be disposed on the first to third anode electrodes AE1 to AE3 and the cathode electrode CE. The first bank BNK1 may have a first opening OP1 exposing portions of the first to third anode electrodes AE1 to AE3 and the cathode electrode CE.

[0119] The first to third light-emitting elements LD1 to LD3 may overlap with the first opening OP1 of the first bank BNK1. For example, each of the first to third light-emitting elements LD1 to LD3 may be disposed within each of the first openings OP1 of the first bank BNK1. In this manner, the first bank BNK1 may serve as a pixel-defining film defining the region in which the first to third light-emitting elements LD1 to LD3 are disposed.

[0120] The first bank BNK1 is configured to include a light-blocking material to prevent light mixing between adjacent sub-pixels. In an embodiment, the first bank BNK1 may include an organic material. For example, within the spirit and scope of the present disclosure, the first bank BNK1 may include an organic insulating material such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, or the like.

[0121] The first light emitting element LD1 may include a first semiconductor layer 11, an active layer 12, a second semiconductor layer 13, and an auxiliary layer 15. The first light emitting element LD1 may include a light emitting stack in which the auxiliary layer 15, the first semiconductor layer 11, the active layer 12, and the second semiconductor layer 13 are sequentially stacked one on another.

[0122] The first semiconductor layer 11 is configured to provide electrons to the active layer 12. For example, the first semiconductor layer 11 may include at least one n-type semiconductor layer. For example, the first semiconductor layer 11 may include one of gallium nitride (GaN), aluminum gallium nitride (AlGaN), indium gallium nitride (InGaN), aluminum nitride (AlN), and indium nitride (InN), and within the spirit and scope of the present disclosure, the first semiconductor layer 11 may be an n-type semiconductor layer doped with a first conductive dopant (or n-type dopant) such as silicon (Si), germanium (Ge), tin (Sn), etc. However, the material included in the first semiconductor layer 11 is not limited thereto, and the first semiconductor layer 11 may be made of various materials. In an embodiment, the first semiconductor layer 11 may include a gallium nitride (GaN) semiconductor material doped with a first conductive dopant (or n-type dopant). In an embodiment, the first semiconductor layer 11 may form an n-type semiconductor layer together with the auxiliary layer 15.

[0123] The active layer 12 is provided on the first semiconductor layer 11 and may be a region in which electrons and holes recombine. When electrons and holes recombine in the active layer 12, they transition to a low energy level, and thus, light having a wavelength corresponding thereto may be generated. The active layer 12 may have a single quantum well structure or a multi-quantum well structure. In the case where the active layer 12 is formed as a multi-quantum well structure, a unit including a barrier layer, a strain enhancement layer, and a well layer may be repeatedly stacked to form the active layer 12. However, the embodiment of the active layer 12 is not limited thereto.

[0124] The second semiconductor layer 13 is disposed on the active layer 12 and provides a hole in the active layer 12. The second semiconductor layer 13 may include a semiconductor layer of a different type from the first semiconductor layer 11. For example, the second semiconductor layer 13 may include at least one p-type semiconductor layer. For example, the second semiconductor layer 13 may include at least one of gallium nitride (GaN), aluminum gallium nitride (AlGaN), indium gallium nitride (InGaN), aluminum nitride (AlN), and indium nitride (InN), and within the spirit and scope of the present disclosure, the second semiconductor layer 13 may be a p-type semiconductor layer doped with a second conductive dopant (or p-type dopant) such as magnesium (Mg), zinc (Zn), calcium (Ca), strontium (Sr), barium (Ba), etc. However, the material included in the second semiconductor layer 13 is not limited thereto, and the second semiconductor layer 13 may be formed of various materials. In an embodiment, the second semiconductor layer 13 may include a gallium nitride (GaN) semiconductor material doped with a second conductive dopant (or p-type dopant).

[0125] The auxiliary layer 15 may include a gallium nitride (GaN) semiconductor material not doped with impurities, and may form an n-type semiconductor layer together with the first semiconductor layer 11 .

[0126] The first light emitting element LD1 may further include an insulating film 16 covering the outer circumferential surface of the light emitting stack. The insulating film 16 may prevent an electrical short circuit that may occur when the active layer 12 contacts other conductive materials besides the first semiconductor layer 11 and the second semiconductor layer 13. The insulating film 16 may include a transparent insulating material.

[0127] An overcoat layer (OCL) may be disposed in the first opening OP1. The overcoat layer (OCL) may secure the first to third light-emitting elements LD1 to LD3 so that they do not move. The overcoat layer (OCL) may protect components disposed thereunder from foreign matter, such as dust, and moisture. For example, the overcoat layer (OCL) may include at least one of an inorganic insulating film and an organic insulating film. For example, the overcoat layer (OCL) may include epoxy resin, but embodiments are not limited thereto.

[0128] The first passivation layer PSV1 is provided on the first bank BNK1 and the outer coating layer OCL. The first passivation layer PSV1 can protect the components provided thereunder and can provide a flat upper surface. The first passivation layer PSV1 can include an inorganic insulating layer including an inorganic material and / or an organic insulating layer including an organic material. For example, the inorganic insulating layer can include a material such as aluminum oxide (AlO x ) of metal oxides, silicon oxide (SiO x ), silicon nitride (SiN x ) and silicon oxynitride (SiO x N y The organic insulating layer may include, for example, at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, and benzocyclobutene resin.

[0129] The first passivation layer PSV1 may be provided as a single layer, but may also be provided as a multi-layer.

[0130] In an embodiment, the first passivation layer PSV1 may not be provided on the upper surfaces of the first to third light-emitting elements LD1 to LD3. The first to third light-emitting elements LD1 to LD3 may protrude into the light function layer LFL. The first to third light-emitting elements LD1 to LD3 may be at least partially provided in the second opening OP2 of the second bank BNK2. Therefore, light emitted from the first light-emitting element LD1 may be provided to the light function layer LFL at a relatively high ratio.

[0131] The capping layer CPL is provided on the first passivation layer PSV1. The capping layer CPL may protect components below or under the capping layer CPL (such as the first to third light emitting elements LD1 to LD3) from external moisture and humidity. In an embodiment, the capping layer CPL may not be provided on the upper surfaces of the first to third light emitting elements LD1 to LD3. In an embodiment, the capping layer CPL may completely cover the first to third light emitting elements LD1 to LD3 and the first passivation layer PSV1. The capping layer CPL may include amorphous metals such as aluminum oxide (AlO x ) of metal oxides, silicon nitride (SiN x ), silicon oxide (SiO x ) and silicon oxynitride (SiO x N y However, the material of the capping layer CPL is not limited thereto.

[0132] The light function layer LFL is disposed on the capping layer CPL and may include a second bank BNK2, a reflective layer RFL, a second passivation layer PSV2, first and second light conversion patterns CCP1 and CCP2, a light scattering pattern LSP, a low refractive index layer LRL, and a color filter layer CFL.

[0133] The second bank BNK2 is disposed on the capping layer CPL. The second bank BNK2 may overlap with the first bank BNK1. The second bank BNK2 may have a second opening OP2 that overlaps with the first opening OP1. It will be appreciated that the emission area EMA and the non-emission area NEMA for the first to third subpixels SP1 to SP3 are defined by the second bank BNK2. The area that overlaps with the substantial portion of the second bank BNK2 may correspond to the non-emission area NEMA. The area that overlaps with the second opening OP2 of the second bank BNK2 may correspond to the emission area EMA of the first to third subpixels SP1 to SP3.

[0134] The second bank BNK2 may be configured to include a light-blocking material to prevent light mixing between adjacent sub-pixels. In an embodiment, the second bank BNK2 may include an organic material. For example, within the spirit and scope of the present disclosure, the second bank BNK2 may include an organic insulating material such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0135] The reflective layer RFL may be disposed on a side surface of the second bank BNK2 defining the second opening OP2. The reflective layer RFL is configured to reflect incident light, thereby improving the efficiency of emitted light. The reflective layer RFL may include a material suitable for reflecting light. The reflective layer RFL may include at least one of aluminum (Al), silver (Ag), magnesium (Mg), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), titanium (Ti), and alloys of two or more materials selected therefrom. However, embodiments are not limited thereto.

[0136] On the capping layer CPL, a second passivation layer PSV2 is disposed in the second opening OP2. The second passivation layer PSV2 may protect components disposed thereunder and provide a flat upper surface. The second passivation layer PSV2 may include the same material as the first passivation layer PSV1, but the embodiment is not limited thereto.

[0137] On the second passivation layer PSV2 , first and second light conversion patterns CCP1 and CCP2 and a light scattering pattern LSP may be disposed in the second opening OP2 .

[0138] In an embodiment, the first to third light-emitting elements LD1 to LD3 may be configured to emit blue light. In this case, a first light conversion pattern CCP1 may be disposed in the second opening OP2 corresponding to the first subpixel SP1. The first light conversion pattern CCP1 may include first color conversion particles QD1 configured to convert blue light into red light. The second light conversion pattern CCP2 may be disposed in the second opening OP2 corresponding to the second subpixel SP2. The second light conversion pattern CCP2 may include second color conversion particles QD2 configured to convert blue light into green light. In an embodiment, the first and second color conversion particles QD1, QD2 may be quantum dots. A light scattering pattern LSP may be disposed in the second opening OP2 corresponding to the third subpixel SP3. The light scattering pattern LSP may include scattering particles SCT that scatter blue light to improve light output efficiency.

[0139] Thus, the first to third subpixels SP1 to SP3 may be set as red, green, and blue subpixels, respectively. In an embodiment, at least one of the first and second light conversion patterns CCP1 and CCP2 and the light scattering pattern LSP may further include color conversion particles that convert blue light into white light.

[0140] In an embodiment, the first to third light-emitting elements LD1 to LD3 may be configured to emit red light, green light, and blue light, respectively. In this case, each of the first and second light conversion patterns CCP1 and CCP2 and the light scattering pattern LSP may include scattering particles SCT. As described above, the particles included in the first and second light conversion patterns CCP1 and CCP2 and the light scattering pattern LSP may vary depending on the first to third light-emitting elements LD1 to LD3.

[0141] In the embodiment, reference Figure 8 , the first light scattering pattern LSP1_1, the first sub-light conversion pattern CCP1_1, the second light scattering pattern LSP1_2, and the second sub-light conversion pattern CCP1_2 may be sequentially disposed in the second opening OP2 corresponding to the first sub-pixel SP1. The first light scattering pattern LSP2_1, the first sub-light conversion pattern CCP2_1, the second light scattering pattern LSP2_2, and the second sub-light conversion pattern CCP2_2 may be sequentially disposed in the second opening OP2 corresponding to the second sub-pixel SP2. This will be referred to later. Figure 8 This is described in more detail.

[0142] A low-refractive-index layer LRL may be disposed on the second bank BNK2, the reflective layer RFL, the first and second light conversion patterns CCP1 and CCP2, and the light scattering pattern LSP. The low-refractive-index layer LRL may have a refractive index lower than that of the first and second light conversion patterns CCP1 and CCP2 and the light scattering pattern LSP. In an embodiment, the low-refractive-index layer LRL may be omitted in the region corresponding to the third subpixel SP3.

[0143] In an embodiment, a third passivation layer may be disposed on the second bank BNK2, the reflective layer RFL, the first light conversion pattern CCP1, the second light conversion pattern CCP2, and the light scattering pattern LSP, and a low refractive index layer LRL may be disposed on the third passivation layer. Figure 8 This is described in more detail.

[0144] The color filter layer CFL may be disposed on the low refractive index layer LRL. The color filter layer CFL may include first to third color filters CF1 to CF3 and a light blocking pattern LBP.

[0145] Each of the first to third color filters CF1 to CF3 can selectively transmit light within a desired wavelength range. When the first sub-pixel SP1 is a red sub-pixel, the first color filter CF1 may include a red filter. When the second sub-pixel SP2 is a green sub-pixel, the second color filter CF2 may include a green filter. When the third sub-pixel SP3 is a blue sub-pixel, the third color filter CF3 may include a blue filter. The first to third color filters CF1 to CF3 may have a refractive index higher than that of the low refractive index layer LRL. However, embodiments are not limited thereto, and the refractive index of the first to third color filters CF1 to CF3 may be lower than or equal to the refractive index of the low refractive index layer LRL.

[0146] The light-blocking pattern LBP may be disposed between the first to third color filters CF1 to CF3. It will be appreciated that the light-blocking pattern LBP defines the emission area EMA and the non-emission area NEMA for the first to third subpixels SP1 to SP3. The area overlapping the light-blocking pattern LBP may correspond to the non-emission area NEMA. The area not overlapping the light-blocking pattern LBP may correspond to the emission area EMA.

[0147] In an embodiment, the light-blocking pattern LBP may include at least one of various types of light-blocking materials. In an embodiment, each of the light-blocking patterns LBP may be provided in the form of a multilayer structure in which at least two of the first to third color filters CF1 to CF3 overlap. For example, each of the light-blocking patterns LBP may be formed by overlapping the first to third color filters CF1 to CF3. As another example, among the light-blocking patterns LBP, the light-blocking pattern between the first and second color filters CF1 and CF2 may be formed as a multilayer structure in which the first and second color filters CF1 and CF2 overlap, and the light-blocking pattern between the second and third color filters CF2 and CF3 may be formed as a multilayer structure in which the second and third color filters CF2 and CF3 overlap. The light-blocking pattern between the first and third color filters CF1 and CF3 of adjacent pixels may be formed as a multilayer structure in which the first and third color filters CF1 and CF3 overlap. Thus, each of the first to third color filters CF1 to CF3 may extend to the non-emission area NEMA to form the light blocking pattern LBP.

[0148] Figure 8 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0149] refer to Figure 7 and Figure 8, showing a light function layer LFL having multiple layers formed in the second openings OP2_1 and OP2_2 corresponding to the first sub-pixel SP1 and the second sub-pixel SP2.

[0150] The first light scattering pattern LSP1_1 , the first sub-light conversion pattern CCP1_1 , the second light scattering pattern LSP1_2 , and the second sub-light conversion pattern CCP1_2 may be sequentially disposed in the second opening OP2_1 corresponding to the first sub-pixel SP1 .

[0151] The first and second light scattering patterns LSP1_1 and LSP1_2 may include scattering particles SCT that scatter blue light to improve light output efficiency. The first and second sub-light conversion patterns CCP1_1 and CCP1_2 may include first color conversion particles QD1 configured to convert blue light into red light.

[0152] The number of scattering particles SCT included in the first light scattering pattern LSP1_1 may be smaller than that in the second light scattering pattern LSP1_2. For example, the refractive index of the first light scattering pattern LSP1_1 may be about 1.5 or less, and the refractive index of the second light scattering pattern LSP1_2 may be about 1.5 or greater.

[0153] The thickness of each of the first and second sub-light conversion patterns CCP1_1 and CCP1_2 may be greater than the thickness of each of the first and second light scattering patterns LSP1_1 and LSP1_2. In this specification, the thickness may refer to a width in the third direction DR3.

[0154] Thicknesses of the first and second sub-light conversion patterns CCP1_1 and CCP1_2 and the first and second light scattering patterns LSP1_1 and LSP1_2 may be different from each other.

[0155] In an embodiment, the sum of respective thicknesses of the first and second light scattering patterns LSP1_1 and LSP1_2 may be 30% or less of the sum of respective thicknesses of the first and second sub-light conversion patterns CCP1_1 and CCP1_2 and the first and second light scattering patterns LSP1_1 and LSP1_2.

[0156] The first light scattering pattern LSP1_1 may scatter the first reference light emitted from the first light emitting element LD1 to provide the first reference light to the first sub-light conversion pattern CCP1_1.

[0157] The first sub-light conversion pattern CCP1_1 may convert the first light, which is a portion of the first reference light provided from the first light scattering pattern LSP1_1 , into red light.

[0158] The second light scattering pattern LSP1_2 may scatter the remaining portion of the first reference light to provide it to the second sub-light conversion pattern CCP1_2, or may recycle the second light to provide it to the first sub-light conversion pattern CCP1_1. The second light may be light not converted by the first sub-light conversion pattern CCP1_1.

[0159] As a non-limiting example, the second light scattering pattern LSP1_2 may provide first sub-light that is a portion of the second light to the first sub-light conversion pattern CCP1_1 or provide second sub-light that is a remaining portion of the second light to the second sub-light conversion pattern CCP1_2.

[0160] The first sub-light conversion pattern CCP1_1 may convert the first sub-light returned from the second light scattering pattern LSP1_2 into red light, and the second sub-light conversion pattern CCP1_2 may convert the second sub-light into red light.

[0161] In an embodiment, the second sub-light conversion pattern CCP1_2 may convert light among the first sub-light that is not converted by the first sub-light conversion pattern CCP1_1 into red light.

[0162] When the first light scattering pattern LSP1_1, the first sub-light conversion pattern CCP1_1, the second light scattering pattern LSP1_2, and the second sub-light conversion pattern CCP1_2 are sequentially disposed in the second opening OP2_1, the color conversion efficiency of light may be increased. For example, the power consumption of the display device may be reduced.

[0163] The first light scattering pattern LSP2_1 , the first sub-light conversion pattern CCP2_1 , the second light scattering pattern LSP2_2 , and the second sub-light conversion pattern CCP2_2 may be sequentially disposed in the second opening OP2_2 corresponding to the second sub-pixel SP2 .

[0164] Each of the first and second light scattering patterns LSP2_1 and LSP2_2 and the first and second sub-light conversion patterns CCP2_1 and CCP2_2 may be configured similarly to each of the first and second light scattering patterns LSP1_1 and LSP1_2 and the first and second sub-light conversion patterns CCP1_1 and CCP1_2.

[0165] However, the thicknesses of the first light scattering pattern LSP1_1 and the second light scattering pattern LSP1_2 disposed in the second opening OP2_1 and the first light scattering pattern LSP2_1 and the second light scattering pattern LSP2_2 disposed in the second opening OP2_2 may be different from each other. For example, in a case where the light conversion efficiency of the first sub-light conversion pattern CCP1_1 and the second sub-light conversion pattern CCP1_2 disposed in the second opening OP2_1 is lower than the light conversion efficiency of the first sub-light conversion pattern CCP2_1 and the second sub-light conversion pattern CCP2_2 disposed in the second opening OP2_2, the thicknesses of the first light scattering pattern LSP1_1 and the second light scattering pattern LSP1_2 disposed in the second opening OP2_1 may be smaller than the thicknesses of the first light scattering pattern LSP2_1 and the second light scattering pattern LSP2_2 disposed in the second opening OP2_2.

[0166] Thicknesses of the first and second sub-light conversion patterns CCP1_1 and CCP1_2 disposed in the second opening OP2_1 corresponding to the first sub-pixel SP1 and the first and second sub-light conversion patterns CCP2_1 and CCP2_2 disposed in the second opening OP2_2 corresponding to the second sub-pixel SP2 may be different from each other.

[0167] In an embodiment, a third passivation layer PSV3 may be disposed on the second bank BNK2 , the reflective layer RFL, the second sub-light conversion patterns CCP1_2 and CCP2_2 , and the light scattering pattern LSP, and a low refractive index layer LRL may be disposed on the third passivation layer PSV3 .

[0168] The third passivation layer PSV3 may protect components disposed thereunder and may provide a flat upper surface. The third passivation layer PSV3 may include the same material as the first passivation layer PSV1, but the embodiment is not limited thereto.

[0169] Figure 9 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0170] refer to Figure 7 and Figure 9 , showing a light function layer LFL having multiple layers formed in the second openings OP2_1 and OP2_2 corresponding to the first sub-pixel SP1 and the second sub-pixel SP2. Figure 9 The light functional layer LFL is similar to Figure 8 Therefore, the redundant description thereof can be omitted.

[0171] refer to Figure 9The second bank BNK2 may include a first sub-bank BNK2_1 and a second sub-bank BNK2_2 disposed on the first sub-bank BNK2_1. The first sub-bank BNK2_1 and the second sub-bank BNK2_2 may have different widths in the first direction DR1. In an embodiment, the width of the first sub-bank BNK2_1 in the first direction DR1 may be greater than the width of the second sub-bank BNK2_2 in the first direction DR1.

[0172] The first sub-bank BNK2_1 and the second sub-bank BNK2_2 may be made of the same material, and the thicknesses of the first sub-bank BNK2_1 and the second sub-bank BNK2_2 may be different from each other.

[0173] Since the second bank BNK2 may include the first sub-bank BNK2_1 and the second sub-bank BNK2_2 , the second sub-light conversion patterns CCP1_2 and CCP2_2 may have a thickness thicker than the first sub-light conversion patterns CCP1_1 and CCP2_1 .

[0174] Figure 10 Shown according to the embodiment Figure 7 Schematic cross-sectional view of a light functional layer.

[0175] refer to Figure 7 and Figure 10 , showing a light function layer LFL having multiple layers formed in the second openings OP2_1 and OP2_2 corresponding to the first sub-pixel SP1 and the second sub-pixel SP2. Figure 10 The light functional layer LFL is similar to Figure 8 Therefore, the redundant description thereof can be omitted.

[0176] The first sub-light conversion pattern CCP1_1 , the first light scattering pattern LSP1 , and the second sub-light conversion pattern CCP1_2 may be sequentially disposed in the second opening OP2_1 corresponding to the first sub-pixel SP1 .

[0177] The first light scattering pattern LSP1 may include scattering particles SCT that scatter blue light to improve light output efficiency.The first and second sub-light conversion patterns CCP1_1 and CCP1_2 may include first color conversion particles QD1 configured to convert blue light into red light.

[0178] The first sub-light conversion pattern CCP1_1 may convert the first light, which is a portion of the first reference light emitted from the first light emitting element LD1 , into red light.

[0179] The first light scattering pattern LSP1 may scatter the remaining portion of the first reference light to provide it to the second sub-light conversion pattern CCP1_2, or may recycle the second light to provide it to the first sub-light conversion pattern CCP1_1. The second light may be light not converted by the first sub-light conversion pattern CCP1_1.

[0180] As a non-limiting example, the first light scattering pattern LSP1 may provide first sub-light that is a portion of the second light to the first sub-light conversion pattern CCP1_1 or provide second sub-light that is a remaining portion of the second light to the second sub-light conversion pattern CCP1_2.

[0181] The first sub-light conversion pattern CCP1_1 may convert the first sub-light returned from the first light scattering pattern LSP1 into red light, and the second sub-light conversion pattern CCP1_2 may convert the second sub-light into red light.

[0182] In an embodiment, the second sub-light conversion pattern CCP1_2 may convert light among the first sub-light that is not converted by the first sub-light conversion pattern CCP1_1 into red light.

[0183] The first sub-light conversion pattern CCP2_1 , the second light scattering pattern LSP2 , and the second sub-light conversion pattern CCP2_2 may be sequentially disposed in the second opening OP2_2 corresponding to the second sub-pixel SP2 .

[0184] The second light scattering pattern LSP2 and each of the first and second sub-light conversion patterns CCP2_1 and CCP2_2 may be configured similarly to the first light scattering pattern LSP1 and each of the first and second sub-light conversion patterns CCP1_1 and CCP1_2.

[0185] In an embodiment, Figure 9 As described above, the second bank BNK2 may include a first sub-bank BNK2_1 and a second sub-bank BNK2_2 disposed on the first sub-bank BNK2_1.

[0186] Figure 11 A block diagram illustrating an embodiment of a display system is shown.

[0187] refer to Figure 11 , the display system 1000 may include a processor 1100 and a display device 1200 .

[0188] The processor 1100 can perform various tasks and calculations. In an embodiment, within the spirit and scope of the present disclosure, the processor 1100 may include an application processor, a graphics processor, a microprocessor, a central processing unit (CPU), etc. The processor 1100 can be connected to other components of the display system 1000 through a bus system and enable them to step.

[0189] The processor 1100 may transmit the input image data IMG and the control signal CTRL to the display device 1200. The display device 1200 may display an image based on the input image data IMG and the control signal CTRL. The display device 1200 may communicate with the reference image data IMG and the control signal CTRL. Figure 1 The display device DD described is similarly configured. In this case, the input image data IMG and the control signal CTRL can be provided as Figure 1 Input image data IMG and control signal CTRL.

[0190] The display system 1000 may include a computing system that provides an image display function, such as a smartwatch, a mobile phone, a smartphone, a portable computer, a tablet personal computer (PC), a watch phone, an auto display, smart glasses, a portable multimedia layer (PMP), a navigation system, and an ultra-mobile personal computer (UMPC). The display system 1000 may include at least one of a head-mounted display device (HMD), a virtual reality (VR) device, a mixed reality (MR) device, and an augmented reality (AR) device.

[0191] Figures 12 to 15 Shown Figure 11 A schematic perspective view of an application example of a display system.

[0192] refer to Figure 12 , Figure 11 The display system 1000 may be applied to a smart watch 2000 including a display portion 2100 and a band portion 2200 .

[0193] Smartwatch 2000 may be a wearable electronic device. For example, smartwatch 2000 may have a structure in which a band portion 2200 is worn on a user's wrist. Here, display system 1000 and / or display device 1200 may be applied to display portion 2100 so that image data including time information can be provided to the user.

[0194] refer to Figure 13 , Figure 11 The display system 1000 may be applied to a car display system 3000. Here, the car display system 3000 may include a computing system provided inside and / or outside a vehicle to provide image data.

[0195] For example, the display system 1000 and / or the display device 1200 may be applied to at least one of an infotainment panel 3100, an instrument panel 3200, a co-pilot display 3300, a head-up display 3400, a side-view mirror display 3500, and a rear seat display 3600 provided in a vehicle.

[0196] refer to Figure 14 , Figure 11 The display system 1000 can be applied to smart glasses 4000. The smart glasses 4000 can be a wearable electronic device that can be worn on the head of a user. For example, the smart glasses 4000 can be a wearable device for augmented reality.

[0197] Smart glasses 4000 may include a frame 4100 and a lens portion 4200. The frame 4100 may include a housing 4110 supporting the lens portion 4200 and temple portions 4120 for the user to wear. The temple portions 4120 may be connected to the housing 4110 via a hinge to be folded or unfolded relative to the housing 4110.

[0198] A battery, a touch panel, a microphone, and a camera may be embedded in the frame 4100. A projector that outputs light and a processor that controls light signals, etc. may be embedded in the frame 4100.

[0199] The lens portion 4200 may include an optical member that transmits light or reflects light. For example, within the spirit and scope of the present disclosure, the lens portion 4200 may include glass, a transparent synthetic resin, or the like.

[0200] To allow the user's eyes to recognize visual information, the lens portion 4200 can reflect an image from the rear surface (e.g., the surface facing the user's eyes) of the lens portion 4200 using an optical signal transmitted from the projector of the frame 4100. For example, the user can recognize visual information such as the time and date displayed on the lens portion 4200. In this case, the projector and / or the lens portion 4200 can be a type of display device. The display device 1200 can be applied to the projector and / or the lens portion 4200.

[0201] refer to Figure 15 , Figure 11 The display system 1000 can be applied to a head-mounted display device 5000 .

[0202] The head-mounted display device 5000 may be a wearable electronic device that can be worn on the user's head. For example, the head-mounted display device 5000 may be a wearable device for virtual reality or mixed reality.

[0203] The head-mounted display device 5000 may include a head-mounted strap 5100 and a display device housing box 5200. The head-mounted strap 5100 may be connected to the display device housing box 5200. The head-mounted strap 5100 may include a horizontal strap and / or a vertical strap for securing the head-mounted display device 5000 to the user's head. The horizontal strap may be configured to wrap around the side portion of the user's head, and the vertical strap may be configured to wrap around the upper portion of the user's head. However, embodiments are not limited thereto. For example, within the spirit and scope of the present disclosure, the head-mounted strap 5100 may be implemented in the form of an eyeglass frame, a helmet, or the like.

[0204] The display device receiving box 5200 may receive the display system 1000 and / or the display device 1200 .

[0205] While embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the disclosure is not limited to these embodiments, but rather to the broader scope of the presented claims and various obvious modifications and equivalent arrangements.

Claims

1. A display device comprising: The optical functional layer is provided on the substrate, wherein The optical functional layer comprises: a dike having a plurality of openings, and A first light scattering pattern, a first sub-light conversion pattern, a second light scattering pattern, and a second sub-light conversion pattern are sequentially disposed in a first opening of the plurality of openings, and A thickness of each of the first sub-light conversion pattern and the second sub-light conversion pattern is greater than a thickness of each of the first light scattering pattern and the second light scattering pattern.

2. The display device according to claim 1, further comprising: The display element layer is provided between the substrate and the optical function layer, wherein: The display element layer includes a first light-emitting element, a second light-emitting element, and a third light-emitting element corresponding to the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively. the first light scattering pattern scattering the first reference light emitted from the first light emitting element to provide the first reference light to the first sub-light conversion pattern, The first sub-light conversion pattern converts the color of the first light which is a part of the first reference light, and The second light scattering pattern provides second light, which is a remaining portion of the first reference light, to the first sub-light conversion pattern and the second sub-light conversion pattern.

3. The display device according to claim 2, wherein: The second light is light that is not converted by the first sub-light conversion pattern.

4. The display device according to claim 2, wherein The second light scattering pattern provides first sub-light, which is a portion of the second light, to the first sub-light conversion pattern, and provides second sub-light, which is a remaining portion of the second light, to the second sub-light conversion pattern.

5. The display device according to claim 4, wherein The second sub-light conversion pattern converts the color of the second sub-light. The display device according to claim 4 , wherein: The second sub-light conversion pattern converts the color of the first sub-light that is not converted by the first sub-light conversion pattern.

7. The display device according to claim 2, wherein: Another first light scattering pattern, another first sub-light conversion pattern, another second light scattering pattern, and another second sub-light conversion pattern are sequentially disposed in a second opening of the plurality of openings, and The first opening corresponds to the first sub-pixel, The second opening corresponds to the second sub-pixel, and The thickness of the first and second light scattering patterns disposed in the first opening is different from the thickness of the other first and second light scattering patterns disposed in the second opening.

8. The display device according to claim 7, wherein: The thickness of the first sub-light conversion pattern and the second sub-light conversion pattern disposed in the first opening is different from the thickness of the another first sub-light conversion pattern and the another second sub-light conversion pattern disposed in the second opening.

9. The display device according to claim 2, wherein: A passivation layer is disposed on the bank and the second sub-light conversion pattern.

10. The display device according to claim 9, wherein A low refractive index layer is disposed on the passivation layer.

Images