Display device including wire grid polarizing layer

Abstract

According to an embodiment disclosed herein, a display device including a wire grid polarizing layer is provided. The display device comprises: a display layer; a quantum-dot layer which is disposed on the display layer and includes a color conversion layer containing a quantum-dot and a scatterer; and an upper layer which is disposed on the quantum-dot layer and includes a phase retardation layer and a wire grid polarizing layer disposed on the phase retardation layer.

Description

Display device including a wire grid polarizing layer

[0001] The embodiments relate to a display device including a wire grid polarizing layer.

[0002] As information technology develops, the importance of display devices that function as a connecting medium between users and information is increasing.

[0003] Display devices require structures to improve external visibility. For example, there is a need to adjust external light reflectance to improve external visibility.

[0004] A display device may include a panel capable of emitting light. The emitted light may pass through one or more layers and be emitted to the outside. Accordingly, there is also a need to improve the light output efficiency of the display device.

[0005] Embodiments provide a display device including a wire grid polarizing layer having improved visibility by controlling external light reflectance.

[0006] Embodiments provide a display device including a wire grid polarizing layer, wherein light emission efficiency can be improved.

[0007] Embodiments provide a display device including a wire grid polarizing layer capable of implementing a light field display.

[0008] However, the embodiments of the present disclosure are not limited to those described above. The above and other embodiments will become more apparent to those skilled in the art by referring to the detailed description of the disclosure given below.

[0009] According to an embodiment, a display device may include: a display layer; a quantum-dot layer disposed on the display layer, the quantum-dot layer including a color conversion layer including quantum dots and scatterers; and an upper layer disposed on the quantum-dot layer, the upper layer including a phase delay layer and a wire grid polarization layer disposed on the phase delay layer.

[0010] In some embodiments, the upper layer may further include an upper substrate disposed on the wire grid polarization layer. The wire grid polarization layer may include wire grid pattern layers disposed under the upper substrate. Each of the wire grid pattern layers may include a first layer disposed on the upper substrate; a second layer disposed on the first layer; and a third layer disposed on the second layer. Each of the first layer and the second layer may include different metal materials.

[0011] In some embodiments, the first layer may be capable of absorbing at least a portion of light applied to the first layer. The second layer may be capable of reflecting at least a portion of light applied to the second layer.

[0012] In some embodiments, the first layer may include molybdenum tantalum oxide (MoTaOx). The second layer may include aluminum (Al).

[0013] In some embodiments, the thickness of the first layer may range from about 350 nm to about 550 nm.

[0014] In some embodiments, the first layer may be in contact with the upper substrate.

[0015] In some embodiments, the upper substrate may comprise a glass material.

[0016] In some embodiments, the phase delay layer may include a λ / 4 phase difference film.

[0017] In some embodiments, the phase delay layer and the wire grid polarization layer may be directly adjacent to each other.

[0018] In some embodiments, the upper layer may further include an optical layer disposed on the quantum-dot layer; and a color filter layer disposed on the optical layer. The optical layer and the color filter layer may be directly adjacent to each other to form an interface.

[0019] In some embodiments, the refractive index of the optical layer may be greater than the refractive index of the color filter layer and less than the refractive index of the color conversion layer.

[0020] According to an embodiment, the display device may include a first sub-pixel forming a first sub-pixel area in which light of a first color is provided; a second sub-pixel forming a second sub-pixel area in which light of a second color is provided; and a third sub-pixel forming a third sub-pixel area in which light of a third color is provided. The color conversion layer may include a first color conversion layer disposed within the first sub-pixel area and a second color conversion layer disposed within the second sub-pixel area. The quantum-dot layer may further include a scattering layer disposed within the third sub-pixel area.

[0021] According to an embodiment, each of the first color conversion layer, the second color conversion layer, and the scattering layer may include a scatterer.

[0022] According to an embodiment, the display device may further include a light control layer disposed on the upper layer. The light control layer may include a variable light-transmitting layer including liquid crystal molecules; and a lens layer disposed on the variable light-transmitting layer and including lenses and an outer layer disposed on the lenses.

[0023] According to an embodiment, the light provided by the display layer may be input to the light control layer as linearly polarized output light. The lenses and the outer layer may form a boundary surface. The display device may be capable of operating in a 2D image mode for displaying a 2D image or a 3D image mode for displaying a 3D image. When the display device operates in the 2D image mode, the linearly polarized output light may be transmitted without being refracted at the boundary surface. When the display device operates in the 3D image mode, the linearly polarized output light may be refracted at the boundary surface.

[0024] According to an embodiment, the display device may include a display layer including a lower substrate and a pixel circuit layer including a pixel circuit disposed on the lower substrate and a light-emitting element electrically connected to the pixel circuit; a quantum-dot layer disposed on the display layer and including a color conversion layer and a scattering layer; and an upper layer disposed on the quantum-dot layer and including an optical layer, a color filter layer on the optical layer, a phase delay layer on the color filter layer, a wire grid polarization layer on the phase delay layer, and an upper substrate directly disposed on the wire grid polarization layer.

[0025] In some embodiments, the phase delay layer may comprise a λ / 4 phase difference film.

[0026] In an embodiment, the display device may include a display layer that emits light; a wire grid polarization layer disposed on the display layer and including wire grid pattern layers; and an upper substrate disposed on the wire grid polarization layer and forming a grid base on which the wire grid pattern layers are disposed. Each of the wire grid pattern layers may include a first layer directly disposed on the grid base, a second layer on the first layer, and a third layer on the second layer. Each of the first layer and the second layer may include different metal materials. The first layer may be capable of absorbing at least a portion of light applied to the first layer. The second layer may be capable of reflecting at least a portion of light applied to the second layer.

[0027] In an embodiment, the first layer comprises molybdenum tantalum oxide (MoTaO x ) may include. The second layer may include aluminum (Al).

[0028] In some embodiments, the thickness of the first layer may range from about 350 nm to about 550 nm.

[0029] According to an embodiment of the present disclosure, a display device including a wire grid polarizing layer having improved visibility by controlling external light reflectance can be provided.

[0030] According to an embodiment of the present disclosure, a display device including a wire grid polarizing layer with improved light emission efficiency can be provided.

[0031] According to an embodiment of the present disclosure, a display device including a wire grid polarizing layer capable of implementing a light field display can be provided.

[0032] Fig. 1 is a schematic plan view showing a display device according to an embodiment.

[0033] Fig. 2 is a schematic cross-sectional view showing a display device according to an embodiment.

[0034] Figure 3 is a schematic cross-sectional view showing a display layer according to an embodiment.

[0035] Fig. 4 is a schematic cross-sectional view showing a display device according to an embodiment.

[0036] Fig. 5 is a schematic cross-sectional view showing a wire grid polarizing layer according to an embodiment.

[0037] FIG. 6 is a schematic cross-sectional diagram illustrating an optical path within a display device according to an embodiment.

[0038] Fig. 7 is a graph showing the results of an experiment performed to explain the low-reflection characteristics of a wire grid polarizing layer according to an embodiment.

[0039] Fig. 8 is a schematic cross-sectional view showing a display device according to an embodiment.

[0040] Fig. 9 is a schematic block diagram showing the operation mode of a display device according to an embodiment.

[0041] FIG. 10 is a schematic cross-sectional view illustrating a 2D image mode of a display device according to an embodiment.

[0042] FIG. 11 is a schematic cross-sectional view illustrating a 3D image mode of a display device according to an embodiment.

[0043] In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of various embodiments or implementations of the invention. As used herein, the terms "embodiments" and "implementations" are interchangeable terms, referring to non-limiting examples of the devices or methods disclosed herein. However, it will be appreciated that various embodiments may be practiced without these specific details or in one or more equivalent arrangements. It should be understood that the disclosure of various embodiments is neither exclusive nor limiting. For example, specific features, configurations, and characteristics of one embodiment may be utilized or implemented in another embodiment.

[0044] Unless otherwise specified, the illustrated embodiments are to be understood as providing features of the present invention. Accordingly, unless otherwise specified, features, components, modules, layers, films, panels, regions, and / or aspects of the various embodiments (hereinafter individually or collectively referred to as "components") may be combined, separated, interchanged, and / or rearranged without departing from the scope of the present invention.

[0045] The use of crosshatching and / or shading in the accompanying drawings is generally provided to clarify boundaries between adjacent elements. As such, the presence or absence of crosshatching or shading does not convey or indicate any preference or requirement for specific materials, material properties, dimensions, proportions, commonalities between the illustrated elements, and / or any other characteristics, properties, or attributes of the elements, unless otherwise specified. Furthermore, the sizes and relative sizes of elements in the accompanying drawings may be exaggerated for clarity and / or technical purposes. Where the embodiments may be implemented differently, the order of certain processes may be performed differently from the order described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to the order described. Furthermore, like reference numerals designate like elements.

[0046] When a component or layer is referred to as being "disposed on," "connected to," or "connected to" another component or layer, it can be directly disposed on, connected to, or joined to the other component or layer, or there can be intermediate components or layers present. However, when an component or layer is referred to as being "directly disposed on," "directly connected to," or "directly connected to" another component or layer, there are no intervening components or layers present. For this purpose, the term "connected to" can refer to a physical, electrical, and / or fluid connection with or without intervening components. Furthermore, the axis in the first direction (DR1), the axis in the second direction (DR2), and the axis in the third direction (DR3) are not limited to the three axes of a rectangular coordinate system, such as the X, Y, and Z axes, and can be interpreted in a broader sense. For example, the axis in the first direction (DR1), the axis in the second direction (DR2), and the axis in the third direction (DR3) can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of A and B” may be understood to mean A alone, B alone, or any combination of A and B. Additionally, “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 to mean X alone, Y alone, Z alone, or any combination of two or more of X, Y, and Z. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0047] Although terms such as "first" and "second" may be used herein to describe various types of components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Accordingly, the first component discussed below may be referred to as the second component without departing from the teachings of the disclosure.

[0048] Spatially relative terms such as "below," "below," "above," "above," and the like may be used herein for descriptive purposes and thus to describe the relationship of one element to another element(s), as illustrated in the drawings. The spatially relative terms are intended to encompass different orientations of the device during use, operation, and / or manufacture other than the orientation depicted in the drawings. For example, if the device in the drawings were turned over, a component described as "below" or "beneath" another element or feature would be oriented "above" the other element or feature. Thus, the term "below" can encompass both the above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or in other directions), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0049] The present disclosure relates to a display device including a wire grid polarization layer. Hereinafter, a display device including a wire grid polarization layer according to an embodiment will be described with reference to the attached drawings.

[0050] Fig. 1 is a schematic plan view showing a display device according to an embodiment.

[0051] Referring to FIG. 1, the display device (DD) may include a base layer (BSL) and pixels (PXL) arranged on the base layer (BSL). For example, the display device (DD) may further include a driving circuit unit (e.g., a scan driving unit and a data driving unit), wires, pads, etc. for driving the pixels (PXL).

[0052] A display device (DD) (or base layer (BSL)) may include a display area (DA) and a non-display area (NDA). The non-display area (NDA) may refer to an area outside the display area (DA). The non-display area (NDA) may surround at least a portion of the display area (DA).

[0053] The base layer (BSL) may form a base surface of the display device (DD). The base layer (BSL) may be a rigid substrate, a flexible substrate, or a film. For example, the base layer (BSL) may be a rigid substrate made of glass or tempered glass, a flexible substrate (or a thin film) made of plastic or metal, or at least one insulating layer. The material and / or properties of the base layer (BSL) are not limited thereto.

[0054] The display area (DA) may refer to an area where pixels (PXL) are arranged. The non-display area (NDA) may refer to an area where pixels (PXL) are not arranged. In the non-display area (NDA), driving circuits, wires, and pads connected to the pixels (PXL) of the display area (DA) may be arranged.

[0055] Depending on the embodiment, the pixels (PXL) (or sub-pixels (SPX)) are arranged in stripes or pentiles. TM ) may be arranged according to the array structure, etc., but the embodiments are not limited thereto, and various embodiments may be applied.

[0056] According to an embodiment, a pixel (PXL) (or sub-pixels (SPX)) may include a first sub-pixel (SPX1), a second sub-pixel (SPX2), and a third sub-pixel (SPX3). The first sub-pixel (SPX1), the second sub-pixel (SPX2), and the third sub-pixel (SPX3) may each be a sub-pixel. At least one of the first sub-pixel (SPX1), the second sub-pixel (SPX2), and the third sub-pixel (SPX3) may form a pixel unit (e.g., one pixel unit) that emits light of various colors.

[0057] Each of the first sub-pixel (SPX1), the second sub-pixel (SPX2), and the third sub-pixel (SPX3) can emit light of a specific color.

[0058] For example, the first sub-pixel (SPX1) may be a red pixel that emits red light (e.g., a first color), the second sub-pixel (SPX2) may be a green pixel that emits green light (e.g., a second color), and the third sub-pixel (SPX3) may be a blue pixel that emits blue light (e.g., a third color). The red pixel may provide light in a wavelength band of about 600 nm to about 750 nm. The green pixel may provide light in a wavelength band of about 480 nm to about 560 nm. The blue pixel may provide light in a wavelength band of about 370 nm to about 460 nm.

[0059] According to an embodiment, the number of second sub-pixels (SPX2) may be greater than the number of first sub-pixels (SPX1) and the number of third sub-pixels (SPX3). However, the color, type, and / or number of the first sub-pixels (SPX1), the second sub-pixels (SPX2), and the third sub-pixels (SPX3) forming each pixel unit are not limited to a specific example.

[0060] Referring to FIGS. 2 to 5, a display device (DD) including a wire grid polarizing layer (WGP) according to an embodiment will be described.

[0061] Fig. 2 is a schematic cross-sectional view showing a display device according to an embodiment. Fig. 3 is a schematic cross-sectional view showing a display layer according to an embodiment. Fig. 4 is a schematic cross-sectional view showing a display device according to an embodiment. Fig. 5 is a schematic cross-sectional view showing a wire grid polarizing layer according to an embodiment.

[0062] Referring to FIGS. 2 to 5, a display device (DD) according to an embodiment may include a display layer (DL), a quantum-dot layer (QL), and an upper layer (UPL). The quantum-dot layer (QL) may be a bank layer.

[0063] The display layer (DL) can emit light. The display layer (DL) can form a base on which a quantum-dot layer (QL) is arranged.

[0064] The display layer (DL) may include a pixel circuit layer (PCL) including a base layer (BSL) and a light-emitting element layer (LEL). The light-emitting element layer (LEL) may include a light-emitting element (LD) and may form a sub-pixel (SPX).

[0065] The base layer (BSL) can form a base on which a pixel circuit (PXC) is disposed. The pixel circuit (PXC) can be disposed on the base layer (BSL) and can be configured to drive a light-emitting element (LD). The pixel circuit layer (PCL) can include conductive layers and insulating layers, and the conductive layers can form the pixel circuit (PXC). The pixel circuit (PXC) can include circuit elements capable of driving the sub-pixel (SPX) (or the light-emitting element (LD)). The circuit elements can include a driving transistor and may also include additional transistors and capacitors.

[0066] In some embodiments, the base layer (BSL) may be referred to as a first substrate. The base layer (BSL) may be referred to as a lower substrate.

[0067] The light emitting element layer (LEL) may be disposed on the pixel circuit layer (PCL). According to an embodiment, the light emitting element layer (LEL) may include a light emitting element (LD). The light emitting element (LD) may be an inorganic light emitting diode including an inorganic semiconductor, and the light emitting element (LD) may be an organic light emitting diode (OLED) including an organic material. However, the embodiments are not limited thereto. For convenience of explanation, an embodiment in which the light emitting element (LD) includes an organic light emitting diode will be described.

[0068] The light emitting element layer (LEL) may further include a pixel defining layer (PDL), a capping layer (CPL), and an encapsulating film (or encapsulating layer) (TFE).

[0069] According to an embodiment, a light emitting element (LD) may be disposed on a pixel circuit layer (PCL). The light emitting element (LD) may include a first light emitting element included in a first sub-pixel (SPX1), a second light emitting element included in a second sub-pixel (SPX2), and a third light emitting element included in a third sub-pixel (SPX3). The first light emitting element may include a first light emitting portion (EL1) and a first-first electrode (ELT1-1). The second light emitting element may include a second light emitting portion (EL2) and a first-second electrode (ELT1-2). The third light emitting element may include a third light emitting portion (EL3) and a first-third electrode (ELT1-3).

[0070] According to an embodiment, the light emitting element (LD) may include a first electrode (ELT1) (e.g., a first-first electrode (ELT1-1), a first-second electrode (ELT1-2), and a first-third electrode (ELT1-3)), a light emitting portion (EL) (e.g., a first light emitting portion (EL1), a second light emitting portion (EL2), and a third light emitting portion (EL3)), and a second electrode (ELT2). According to an embodiment, the light emitting portion (EL) may be arranged in an area defined by a pixel defining layer (PDL). One surface of the light emitting portion (EL) may be electrically connected to the first electrode (ELT1), and the other surface of the light emitting portion (EL) may be electrically connected to the second electrode (ELT2).

[0071] The first electrode (ELT1) may be an anode electrode for the light-emitting portion (EL), and the second electrode (ELT2) may be a cathode electrode for the light-emitting portion (EL). According to an embodiment, the first electrode (ELT1) and the second electrode (ELT2) may include a conductive material. For example, the conductive material may include one or more of the group consisting of gold (Au), silver (Ag), aluminum (Al), molybdenum (Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), and platinum (Pt). In another example, the conductive material may include one or more of the group consisting of silver nanowires (AgNWs), indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), antimony zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), tin oxide (SnO2), carbon nanotubes, and graphene. However, the embodiments are not limited thereto.

[0072] The light-emitting portion (EL) may have a multilayer thin film structure including a light generation layer (e.g., a light-emitting layer). The light-emitting portion (EL) may include a hole injection layer that injects holes, a hole transport layer that has excellent hole transport properties and suppresses the movement of electrons that are not combined in the light-emitting layer to increase the chance of recombination of holes and electrons, a light-emitting layer that emits light by recombination of injected electrons and holes, an electron transport layer that smoothly transports electrons to the light-emitting layer, and an electron injection layer that injects electrons. The light-emitting portion (EL) may emit light based on an electrical signal provided from an anode electrode (e.g., a first electrode (ELT1)) and a cathode electrode (e.g., a second electrode (ELT2)).

[0073] A pixel defining layer (PDL) can be disposed on a pixel circuit layer (PCL) to define a position at which an EL is arranged. The pixel defining layer (PDL) may include an organic material. For example, the pixel defining layer (PDL) may include one or more of the group consisting of acrylic resin, epoxy resin, phenol resin, polyamide resin, and polyimide resin. However, the embodiments are not limited thereto. In another embodiment, the pixel defining layer (PDL) may include an inorganic material. For example, the pixel defining layer (PDL) may include one or more of silicon oxide (SiOx) and silicon nitride (SiNx). According to an embodiment, the pixel defining layer (PDL) may have a multilayer structure in which a layer including silicon oxide (SiOx) and a layer including silicon nitride (SiNx) are stacked on each other.

[0074] A capping layer (CPL) may be disposed on the second electrode (ELT2). The capping layer (CPL) may cap (or cover / encapsulate) the second electrode (ELT2). The capping layer (CPL) may include an inorganic material.

[0075] The encapsulation film (TFE) may be disposed on the light emitting element (LD) (e.g., the second electrode (ELT2)). The encapsulation film (TFE) may remove or compensate for a step difference generated by the light emitting element (LD) and the pixel defining film (PDL). The encapsulation film (TFE) may include insulating films covering the light emitting element (LD). According to an embodiment, the encapsulation film (TFE) may have a structure in which inorganic films and organic films are alternately laminated. According to an embodiment, the encapsulation film (TFE) may be a thin film encapsulation film.

[0076] According to an embodiment, sub-pixel areas (SPXA) corresponding to the sub-pixels (SPX) may be formed in the display area (DA). The sub-pixel areas (SPXA) may include a first sub-pixel area (SPXA1) corresponding to the first sub-pixel (SPX1), a second sub-pixel area (SPXA2) corresponding to the second sub-pixel (SPX2), and a third sub-pixel area (SPXA3) corresponding to the third sub-pixel (SPX3).

[0077] A quantum-dot layer (QL) may be disposed on a display layer (DL) (e.g., a light-emitting element layer (LEL)). The quantum-dot layer (QL) may be a layer on which a color conversion layer (CCL) and / or a scattering layer (SCT) are disposed.

[0078] The quantum-dot layer (QL) may include a first capping layer (CP1), a bank (BNK), a color conversion layer (CCL), a scattering layer (SCT), and a second capping layer (CP2). The color conversion layer (CCL) may include a first color conversion layer (CCL1) and a second color conversion layer (CCL2).

[0079] The first capping layer (CP1) may be disposed on the light emitting element layer (LEL). In some embodiments, the first capping layer (CP1) may cap (or cover / encapsulate) the lower portions of each of the first color conversion layer (CCL1), the second color conversion layer (CCL2), and the scattering layer (SCT).

[0080] According to an embodiment, the first capping layer (CP1) may be provided (or formed) across the first to third sub-pixels (SPX1, SPX2, SPX3). According to an embodiment, the first capping layer (CP1) may be an inorganic layer and include one or more of the group consisting of silicon nitride (SiNx), aluminum nitride (AlNx), titanium nitride (TiNx), silicon oxide (SiOx), aluminum oxide (AlxOy), titanium oxide (TiOx), silicon oxycarbide (SiOxCy), and silicon oxynitride (SiOxNy). However, the embodiments are not limited thereto.

[0081] The bank (BNK) may be disposed on a display layer (DL) (e.g., a light emitting element layer (LEL)). The bank (BNK) may be disposed between sub-pixel areas (SPXA).

[0082] The bank (BNK) can surround at least a portion of an area. For example, the bank (BNK) can surround at least a portion of an area for forming a sub-pixel area (SPXA) and can protrude in the thickness direction of the base layer (BSL) (e.g., the third direction (DR3)). Accordingly, the bank (BNK) can form a space in which a first color conversion layer (CCL1), a second color conversion layer (CCL2), and a scattering layer (SCT) can be arranged (e.g., accommodated).

[0083] The bank (BNK) may include an organic material. In some embodiments, the bank (BNK) may include one or more of the following: acrylic resin, epoxy resin, phenol resin, polyamide resin, and polyimide resin. However, the embodiments are not limited thereto.

[0084] According to an embodiment, a color conversion layer (CCL) may be disposed on a light emitting element layer (LEL) (e.g., a light emitting element (LD)). The color conversion layer (CCL) may change a wavelength of light. According to an embodiment, the first to third sub-pixels (SPX1, SPX2, SPX3) may include light emitting elements (LD) that emit light of the same color. For example, the first to third sub-pixels (SPX1, SPX2, SPX3) may include light emitting elements (LD) that emit light of a third color (e.g., blue). By disposing (or forming) a color conversion layer (CCL) including color conversion particles on each of the first to third sub-pixels (SPX1, SPX2, SPX3), a full-color image may be displayed.

[0085] However, the color of light emitted by the light-emitting element (LD) is not limited to the examples described above. For convenience of explanation, the description will be based on an example in which the light-emitting element (LD) of each sub-pixel (SPX) emits blue light.

[0086] The first color conversion layer (CCL1) may include first color conversion particles that convert light of a third color emitted from the light emitting element (LD) into light of a first color. For example, the first color conversion layer (CCL1) may include first quantum dots (QD1) dispersed within a matrix material such as a base resin.

[0087] According to an embodiment, when the light-emitting element (LD) is a blue light-emitting element that emits blue light and the first sub-pixel (SPX1) is a red pixel, the first color conversion layer (CCL1) may include a first quantum dot (QD1) that converts blue light emitted from the blue light-emitting element into red light. The first quantum dot (QD1) may absorb blue light and shift its wavelength according to energy transition to emit red light. When the first sub-pixel (SPX1) is a pixel of a different color, the first color conversion layer (CCL1) may include a first quantum dot (QD1) corresponding to the color of the first sub-pixel (SPX1).

[0088] The second color conversion layer (CCL2) may include second color conversion particles that convert light of a third color emitted from the light emitting element (LD) into light of a second color. For example, the second color conversion layer (CCL2) may include second quantum dots (QD2) dispersed within a matrix material such as a base resin.

[0089] According to an embodiment, when the light-emitting element (LD) is a blue light-emitting element that emits blue light and the second sub-pixel (SPX2) is a green pixel, the second color conversion layer (CCL2) may include a second quantum dot (QD2) that converts the blue light emitted from the blue light-emitting element into green light. The second quantum dot (QD2) may absorb blue light and shift the wavelength according to energy transition to emit green light. Meanwhile, when the second sub-pixel (SPX2) is a pixel of a different color, the second color conversion layer (CCL2) may include a second quantum dot (QD2) corresponding to the color of the second sub-pixel (SPX2).

[0090] According to an embodiment, by incident blue light having a relatively short wavelength in the visible light range onto the first quantum dot (QD1) and the second quantum dot (QD2), respectively, the absorption coefficients of the first quantum dot (QD1) and the second quantum dot (QD2) can be increased. Accordingly, the efficiency of light emitted from the first sub-pixel (SPX1) and the second sub-pixel (SPX2) can be improved, and excellent color reproducibility can be ensured. For example, by forming the first to third sub-pixels (SPX1, SPX2, SPX3) using light-emitting elements (LD) of the same color (for example, blue light-emitting elements), the manufacturing efficiency of the display device (DD) can be increased.

[0091] The scattering layer (SCT) may be provided (or formed) to efficiently utilize the third color (or blue) light emitted from the light-emitting element (LD). For example, when the light-emitting element (LD) is a blue light-emitting element that emits blue light and the third sub-pixel (SPX3) is a blue pixel, the scattering layer (SCT) may include at least one type of scatterer (SC) to efficiently utilize the light emitted from the light-emitting element (LD). For example, the scatterer (SC) of the scattering layer (SCT) may include various light-scattering particles or light-scattering materials. For example, the scatterer (SC) may include one or more of the group consisting of titanium oxide (TiOx), silica (SiOx) (e.g., silica beads, hollow silica, etc.), zirconium oxide (ZrOx), aluminum oxide (AlxOy), indium oxide (InxOy), zinc oxide (ZnOx), tin oxide (SnOx), and antimony oxide (SbxOy).

[0092] For example, the scatterer (SC) may not be placed only in the third sub-pixel (SPX3). Depending on the embodiment, the scatterer (SC) may be placed (or included) in the first color conversion layer (CCL1). The scatterer (SC) may be placed (or included) in the second color conversion layer (CCL2).

[0093] The second capping layer (CP2) can be disposed on top of each of the first color conversion layer (CCL1), the second color conversion layer (CCL2), and the scattering layer (SCT), and can cap (or cover / encapsulate) each of the first color conversion layer (CCL1), the second color conversion layer (CCL2), and the scattering layer (SCT).

[0094] According to an embodiment, the second capping layer (CP2) may be provided (or formed) across the first to third sub-pixels (SPX1, SPX2, SPX3). According to an embodiment, the second capping layer (CP2) may be an inorganic layer and include one or more of the group consisting of silicon nitride (SiNx), aluminum nitride (AlNx), titanium nitride (TiNx), silicon oxide (SiOx), aluminum oxide (AlxOy), titanium oxide (TiOx), silicon oxycarbide (SiOxCy), and silicon oxynitride (SiOxNy). However, the embodiments are not limited thereto.

[0095] The upper layer (UPL) may be disposed on the quantum dot layer (QL). In some embodiments, light provided from the display layer (DL) may transmit through the upper layer (UPL) and be emitted to the outside.

[0096] The upper layer (UPL) may include an optical layer (LR), a color filter layer (CF), a phase delay layer (QWP), a wire grid polarizing layer (WGP), and an upper substrate (USUB).

[0097] The optical layer (LR) may be disposed on the quantum-dot layer (QL) (e.g., the second capping layer (CP2)). In some embodiments, the optical layer (LR) may be disposed under the color filter layer (CF). The optical layer (LR) and the color filter layer (CF) may be adjacent to each other (e.g., directly adjacent) to form an interface.

[0098] The optical layer (LR) may have a higher refractive index than the layers forming the color filter layer (CF). The optical layer (LR) may have a lower refractive index than the layers forming the quantum-dot layer (QL) (e.g., the color conversion layer (CCL) and the scattering layer (SCT)) and may form a light recycling structure.

[0099] The optical layer (LR) may include various materials to have a single refractive index. For example, the optical layer (LR) may include various resins and hollow silica. In another example, the optical layer (LR) may include zirconium oxide (ZrOx). However, the embodiments are not limited thereto.

[0100] In some embodiments, the optical layer (LR) may be referred to as a low-refractive layer.

[0101] The color filter layer (CF) may be disposed on the optical layer (LR). The color filter layer (CF) may be disposed under the phase delay layer (QWP). The color filter layer (CF) may include a first color filter (CF1) included in (e.g., corresponding to) a first sub-pixel (SPX1), a second color filter (CF2) included in (e.g., corresponding to) a second sub-pixel (SPX2), and a third color filter (CF3) included in (e.g., corresponding to) a third sub-pixel (SPX3).

[0102] A first color filter (CF1) may be positioned within the first sub-pixel area (SPXA1). The first color filter (CF1) may include a color filter material (e.g., a dye or pigment) that selectively transmits light of a first color (e.g., red).

[0103] The second color filter (CF2) may be positioned within the second sub-pixel area (SPXA2). The second color filter (CF2) may include a color filter material (e.g., a dye or pigment) that selectively transmits light of a second color (e.g., green).

[0104] A third color filter (CF3) may be positioned within the third sub-pixel area (SPXA3). The third color filter (CF3) may include a color filter material (e.g., a dye or pigment) that selectively transmits light of a third color (e.g., blue).

[0105] According to an embodiment, a non-sub-pixel area (NSPXA) in which light of a single color is not recognized may be formed between the sub-pixel areas (SPXA). According to an embodiment, when viewed in a plane within the non-sub-pixel area (NSPXA), a first color filter (CF1), a second color filter (CF2), and a third color filter (CF3) may overlap.

[0106] The phase delay layer (QWP) may be disposed on the color filter layer (CF). The phase delay layer (QWP) may be disposed under the wire grid polarization layer (WGP). The phase delay layer (QWP) may be closer to the upper substrate (USUB) than the color conversion layer (CCL).

[0107] In some embodiments, the phase delay layer (QWP) can be adjacent (e.g., directly adjacent) to the wire grid polarization layer (WGP). For example, the phase delay layer (QWP) can be in contact (e.g., physically in contact) with the wire grid polarization layer (WGP).

[0108] In some embodiments, the phase retardation layer (QWP) may include a λ / 4 phase difference film. Experimentally, the λ / 4 phase difference film can form a phase difference of about λ / 4 between two polarization components that are substantially parallel to the optical axis of the phase retardation layer (QWP) and perpendicular to each other. Accordingly, the λ / 4 phase difference film can change linear polarization into circular polarization or change circular polarization into linear polarization.

[0109] A phase retardation layer (QWP) may also retard the phase of incident light. In some embodiments, the phase retardation layer (QWP) may include one or more of the following: a birefringent film comprising a polymer, a liquid crystal alignment film, and an alignment layer of a liquid crystal polymer formed on a substrate. However, the embodiments are not limited thereto.

[0110] A wire grid polarization layer (WGP) may be disposed on a phase delay layer (QWP). The wire grid polarization layer (WGP) may be disposed on a lower portion of an upper substrate (USUB).

[0111] In some embodiments, the wire grid polarization layer (WGP) may be adjacent (e.g., directly adjacent) to the phase delay layer (QWP). The wire grid polarization layer (WGP) may be in contact (e.g., physically in contact) with the phase delay layer (QWP).

[0112] In some embodiments, the wire grid polarization layer (WGP) may linearly polarize incident light. The wire grid polarization layer (WGP) may include a wire grid pattern layer (WL). The wire grid polarization layer (WGP) may include a structure in which the wire grid pattern layer (WL) is patterned and periodically arranged on a substrate (e.g., a grid base (GBS)).

[0113] In some embodiments, the wire grid polarization layer (WGP) may include a reflective polarization structure. In some embodiments, the wire grid polarization layer (WGP) may not include an absorptive planar polarization structure.

[0114] For example, the wire grid polarization layer (WGP) can reflect polarization parallel to the pattern direction of the wire grid pattern layer (WL). The wire grid polarization layer (WGP) can transmit polarization perpendicular to the pattern direction of the wire grid pattern layer (WL). According to an embodiment, the wire grid polarization layer (WGP) can include a reflective polarization structure, and the reflected light can be recycled. Details thereof are described below with reference to FIG. 6.

[0115] In some embodiments, the wire grid polarization layer (WGP) may be adjacent (e.g., directly adjacent) to the upper substrate (USUB). For example, the upper substrate (USUB) may be a grid base (GBS) for patterning the wire grid pattern layer (WL).

[0116] According to an embodiment, the wire grid pattern layer (WL) can be manufactured by forming (e.g., depositing) conductive layers and an insulating layer on a grid base (GBS) forming an upper substrate (USUB) and then etching them.

[0117] For example, a first base layer for forming a first layer (L1), a second base layer for forming a second layer (L2), and a third base layer for forming a third layer (L3) are deposited on an upper substrate (USUB), and then the first base layer, the second base layer, and the third base layer are collectively etched, thereby providing the first layer (L1), the second layer (L2), and the third layer (L3).

[0118] According to an embodiment, the upper substrate (USUB) may be a base substrate for forming a phase delay layer (QWP), a color filter layer (CF), an optical layer (LR), and a quantum-dot layer (QL) in subsequent processes. According to an embodiment, the quantum-dot layer (QL) can be manufactured only after the wire grid polarization layer (WGP) is patterned on the upper substrate (USUB). For example, the risk of the quantum-dot layer (QL) being damaged due to a process environment (e.g., high temperature) for manufacturing the wire grid polarization layer (WGP) or the like can be prevented.

[0119] The pitch of each wire grid pattern layer (WL) can be determined based on the wavelength of light provided from the display layer (DL), and each can have a predetermined aspect ratio. However, the embodiments are not limited thereto.

[0120] According to an embodiment, the wire grid pattern layer (WL) may include a first layer (L1), a second layer (L2), and a third layer (L3).

[0121] The first layer (L1) may be the layer closest to the grid base (GBS) among the layers forming the wire grid pattern layer (WL). The first layer (L1) may be adjacent (e.g., directly adjacent) to the grid base (GBS).

[0122] The first layer (L1) can reduce external light reflection on the display device (DD). For example, the first layer (L1) can absorb at least a portion of the external light.

[0123] In some embodiments, the first layer (L1) may include a different metal material than the second layer (L2). For example, the first layer (L1) may include molybdenum tantalum oxide (MoTaOx). The molybdenum tantalum oxide (MoTaOx) may be a mixed material of molybdenum oxide (MoOx) and tantalum (Ta). However, the embodiments are not limited thereto.

[0124] According to an embodiment, the first layer (L1) may include MoTaOx, and the thickness of the first layer (L1) may be in a range of about 350 nm to about 550 nm. According to an embodiment, the thickness of the first layer (L1) may be in a range of about 400 nm to about 500 nm. Here, the thickness may be defined based on the direction in which the first layer (L1) and the second layer (L2) are spaced apart (for example, the third direction (DR3)). When the thickness of the first layer (L1) satisfies the above-described numerical range, the wire grid polarization layer (WGP) may have excellent low-reflection characteristics. An experimental example related to this is described below with reference to FIG. 7.

[0125] The second layer (L2) may be positioned between the first layer (L1) and the third layer (L3). The second layer (L2) may include a reflective wall.

[0126] The second layer (L2) can reflect at least a portion of the light. Accordingly, the wire grid polarizing layer (WGP) can include a reflective polarizing structure.

[0127] In some embodiments, the second layer (L2) may include a reflective metallic material. For example, the second layer (L2) may include aluminum (Al). However, the embodiments are not limited thereto.

[0128] The third layer (L3) may be disposed on the second layer (L2). The third layer (L3) may cover at least a portion of the second layer (L2).

[0129] The third layer (L3) can protect other parts of the wire grid pattern layer (WL). For example, the third layer (L3) can be an oxidation prevention film for the first layer (L1) and the second layer (L2).

[0130] Depending on the embodiment, the third layer (L3) may include various materials. For example, the third layer (L3) may include silicon oxide (SiOx) or molybdenum (Mo). However, the embodiments are not limited thereto.

[0131] In some embodiments, the wire grid polarization layer (WGP) may be disposed between the wire grid pattern layers (WL) and may further include a protective layer covering each of the layers (L1, L2, L3). The protective layer may include a transparent material.

[0132] The upper substrate (USUB) may be disposed on the wire grid polarization layer (WGP). In some embodiments, the upper substrate (USUB) may be a manufacturing substrate for manufacturing the wire grid polarization layer (WGP) as described above, and may be a grid base (GBS).

[0133] In some embodiments, the upper substrate (USUB) may include a glass substrate (e.g., a glass material). However, the embodiments are not necessarily limited thereto.

[0134] Referring to FIG. 6, the optical path within the display device (DD) according to the embodiment will be described.

[0135] FIG. 6 is a schematic cross-sectional diagram illustrating an optical path within a display device according to an embodiment.

[0136] For convenience of explanation, the hatching of the color filter layer (CF) and the color conversion layer (CCL) in FIG. 6 is expressed based on the layers included in the second sub-pixel (SPX2). For example, the technical features described with reference to FIG. 6 can be applied to the first sub-pixel (SPX1) and can also be applied to the third sub-pixel (SPX3). For example, although the following description is based on the color conversion layer (CCL), a corresponding (e.g., substantially the same or similar) light path can also be defined (or formed) in the scattering layer (SCT).

[0137] For convenience of explanation, FIG. 6 illustrates configurations arranged on the upper side of the color conversion layer (CCL) based on the color conversion layer (CCL) and the light emission path (or optical path).

[0138] Figure 6 illustrates examples of light emission paths provided from a display layer (DL) (e.g., a light emitting element (LD)).

[0139] FIG. 6 schematically illustrates the optical paths of each of scattered light (L) provided from a display layer (DL) and scattered by a color conversion layer (CCL) (or scattering layer (SCT)) and emitted in an emission direction, internal light (IL) defined (or formed) in the internal structure of the display device (DD), and output light (OL) emitted to the outside. The internal light (IL) may include a first internal light (IL1), a second internal light (IL2), and a third internal light (IL3). The output light (OL) may include a first output light (OL1), a second output light (OL2), and a third output light (OL3).

[0140] Light provided from a display layer (DL) (e.g., a light-emitting element (LD)) may be scattered by a scatterer (SC) in a color conversion layer (CCL) and emitted to the outside. Accordingly, scattered light (L) provided (e.g., scattered) by the color conversion layer (CCL) may be directed upward.

[0141] The scattered light (L) can transmit through the second capping layer (CP2), the optical layer (LR), and the color filter layer (CF), and a portion of the scattered light (L) can transmit through the phase delay layer (QWP) and the wire grid polarizing layer (WGP) to be provided as linearly polarized first output light (OL1), and another portion of the scattered light (L) can transmit through the phase delay layer (QWP) but be reflected by the wire grid polarizing layer (WGP) to be provided as first internal light (IL1).

[0142] The scattered light (L) can be provided as circularly polarized light defined in the first rotational direction by transmitting through the phase delay layer (QWP). Accordingly, a portion of the scattered light (L) can transmit through the wire grid polarization layer (WGP), and the linearly polarized first output light (OL1) can be emitted. For example, the first inner light (IL1) that is reflected and faces inward can still be provided as circularly polarized light defined in the first rotational direction.

[0143] The first internal light (IL1) can transmit through the phase delay layer (QWP) and the color filter layer (CF), a portion of the first internal light (IL1) can be reflected at the interface between the color filter layer (CF) and the optical layer (LR) and provided as the second internal light (IL2), and another portion of the first internal light (IL1) can transmit through the optical layer (LR) and the second capping layer (CP2) and be provided again to the color conversion layer (CCL).

[0144] The second internal light (IL2) may be reflected at the interface between the color filter layer (CF) and the optical layer (LR) and may be provided as circularly polarized light defined in a second rotational direction different from the first rotational direction described above. Accordingly, the second internal light (IL2) may include an optical component that can transmit the phase retardation layer (QWP). The second internal light (IL2) may be provided as linearly polarized second output light (OL2) by transmitting through the phase retardation layer (QWP) and the wire grid polarization layer (WGP).

[0145] The first internal light (IL1) provided again to the color conversion layer (CCL) can be scattered by the scatterer (SC) to form a third internal light (IL3) directed in the light-emitting direction (e.g., the third direction (DR3)).

[0146] The third internal light (IL3) can transmit through the second capping layer (CP2), the optical layer (LR), and the color filter layer (CF), and the third internal light (IL3) can transmit through the phase delay layer (QWP) to be provided as circularly polarized light, thereby transmitting through the wire grid polarization layer (WGP). The third internal light (IL3) transmitted through the wire grid polarization layer (WGP) can be provided as linearly polarized third output light (OL3).

[0147] According to an embodiment, a wire grid polarization layer (WGP) and a phase delay layer (QWP) are arranged adjacent to each other adjacent to an upper substrate (USUB), so that a reflective polarization structure can be provided in which light recycling is performed more efficiently.

[0148] According to the light recycling structure according to this embodiment, a wire grid polarization layer (WGP) and a phase delay layer (QWP) can be arranged in order on the upper side of a quantum-dot layer (QL) including quantum dots (QDs) and scatterers (SC), and accordingly, the path of light (e.g., internal light (IL)) defined (or formed) inside the display device (DD) can be variously defined (or formed), but can ultimately be emitted to the outside.

[0149] According to an embodiment, the light output efficiency can be improved, while the light output to the outside can be arranged to be linearly polarized.

[0150] According to an embodiment, a wire grid polarizing layer (WGP) can have excellent low-reflection characteristics. In this regard, with reference to FIG. 7, the low-reflection characteristics of a wire grid polarizing layer (WGP) according to an embodiment will be described.

[0151] Fig. 7 is a graph showing the results of an experiment performed to explain the low-reflection characteristics of a wire grid polarizing layer according to an embodiment.

[0152] This experiment shows the reflectance according to the thickness of the first layer (L1) included in the wire grid polarization layer (WGP) according to an embodiment. This experiment was conducted on the basis that the first layer (L1) includes MoTaOx. For example, the reflectance of MoTaOx was measured by applying light of approximately 550 nm while varying the thickness of MoTaOx.

[0153] Referring to the experimental results of Fig. 7, it can be confirmed that when the first layer (L1) has a thickness of about 350 nm to about 550 nm, it has excellent low-reflection characteristics. Accordingly, when the wire grid polarization layer (WGP) according to the embodiment includes the first layer (L1) having a thickness of about 350 nm to about 550 nm, it can have excellent low-reflection characteristics.

[0154] Referring to FIGS. 8 to 11, an embodiment in which a display device (DD) further includes a light control layer (LCL) will be described. For convenience of explanation, any content that may overlap with the above-described content will be briefly described or not repeated.

[0155] Fig. 8 is a schematic cross-sectional view illustrating a display device according to an embodiment. Fig. 9 is a schematic block diagram illustrating an operation mode of a display device according to an embodiment. Fig. 10 is a schematic cross-sectional view illustrating a 2D image mode of a display device according to an embodiment. Fig. 11 is a schematic cross-sectional view illustrating a 3D image mode of a display device according to an embodiment.

[0156] According to an embodiment, the display device (DD) may further include a light control layer (LCL) capable of implementing a stereoscopic image.

[0157] The light control layer (LCL) may be disposed on the upper layer (UPL). Accordingly, the light control layer (LCL) may be disposed on the upper substrate (USUB) which is disposed on the wire grid polarization layer (WGP). In connection with the above, according to an embodiment, light provided from the display layer (DL) may be linearly polarized by transmitting through the upper substrate (USUB), and linearly polarized output light (OL) may be provided (e.g., input) to the light control layer (LCL).

[0158] According to an embodiment, the display device (DD) may include a light control layer (LCL) to implement a light field display. For example, referring to FIG. 9, the display device (DD) may operate in a 2D (2-dimensional) image mode or a 3D (3-dimensional) image mode. For example, the display device (DD) may include a controller for changing an operation mode, and the controller may change the operation mode of the display device (DD) based on a preset standard, a user input, etc. The controller may be implemented by including any one of software, hardware, firmware, and an application. However, the embodiments are not limited thereto.

[0159] According to an embodiment, when the display device (DD) operates in a 3D image mode, the display device (DD) can form a light field expressed as a vector distribution (e.g., intensity, direction, etc.) of light in space using the lens layer (LL) to implement a stereoscopic image. The light field display can be implemented when the display device (DD) operates in a 3D image mode to display or implement the depth and side of an object. Therefore, the light field display can be a display technology that is expected to be utilized in various ways through convergence with augmented reality (AR) technology because it can implement more natural 3D images.

[0160] For example, the display device (DD) can also operate in 2D image mode. When the display device (DD) operates in 2D image mode, the display device (DD) can provide an image to the entire display area (DA).

[0161] According to an embodiment, the display device (DD) can selectively operate in a 2D image mode and a 3D image mode, and the operation mode can be appropriately selected depending on the image reproduction environment to be used.

[0162] In some embodiments, the light control layer (LCL) may include a variable light transmission layer (VTL) and a lens layer (LL).

[0163] The variable light-transmitting layer (VTL) can be driven in a Twisted Nematic (TN) liquid crystal mode with a λ / 2 phase shift. However, this is merely exemplary, and the VTL can also be driven in other liquid crystal modes such as Vertical Alignment (VA), Optical Compensated Bend (OCB), or Electrically Controlled Birefringence (ECB).

[0164] According to an embodiment, the variable light-transmitting layer (VTL) may include liquid crystal molecules (LC). The arrangement (or alignment) state of the liquid crystal molecules (LC) may be changed based on an electrical signal provided to the variable light-transmitting layer (VTL).

[0165] A lens layer (LL) may be disposed on a variable light-transmitting layer (VTL). The lens layer (LL) may include lenses (LS) and an outer layer (PL) covering the lenses (LS).

[0166] The lens layer (LL) can be implemented in various structures. For example, the lens layer (LL) can be implemented as a lenticular lens array, a micro lens array, etc.

[0167] The lens layer (LL) may or may not refract light transmitted through the variable light-transmitting layer (VTL). For example, when the display device (DD) operates in a 2D image mode, the lens layer (LL) may transmit (e.g., directly transmit) an image (e.g., output light (OL)) provided from the display layer (DL) (e.g., sub-pixel (SPX)), and when the display device (DD) operates in a 3D image mode, the lens layer (LL) may separate a viewing area of ​​an image provided from the display layer (DL). When the display device (DD) operates in a 3D image mode, the lens layer (LL) may cause a multi-viewpoint image formed by the display layer (DL) to be imaged in a corresponding viewing area for each viewpoint image based on (e.g., using) diffraction and refraction phenomena of light.

[0168] The lenses (LS) can refract light provided from the display layer (DL) depending on the driving state of the variable light-transmitting layer (VTL). For example, when the liquid crystal molecules (LC) of the variable light-transmitting layer (VTL) are in a first alignment state (e.g., an alignment state for operating in a 3D image mode, see FIG. 11), the lenses (LS) can refract light, thereby forming a light field. For example, a stereoscopic image can be implemented by the lenses (LS). In another example, when the liquid crystal molecules (LC) of the variable light-transmitting layer (VTL) are in a second alignment state different from the first alignment state (e.g., an alignment state for operating in a 2D image mode, see FIG. 10), the lenses (LS) may not refract light, and for example, a 2D image can be implemented (or displayed).

[0169] The lenses (LS) may be a liquid crystal type lens array. For example, the lenses (LS) may include lens liquid crystal molecules (200). The lens liquid crystal molecules (200) may be aligned in one direction.

[0170] According to an embodiment, the lenses (LS) may or may not form a refractive surface with the outer layer (PL) depending on the operating state of the display device (DD), including lens liquid crystal molecules (200).

[0171] For example, when the display device (DD) operates in a 3D image mode, the lenses (LS) including the lens liquid crystal molecules (200) and the outer layer (PL) may form an interface that induces light refraction. When the display device (DD) operates in a 2D image mode, the interface between the lenses (LS) including the lens liquid crystal molecules (200) and the outer layer (PL) may not refract the provided light.

[0172] In some embodiments, in order to implement a light field display using a light control layer (LCL), the input light of the display device (DD) may need to be linearly polarized. As described above, in some embodiments, an upper layer (UPL) including a wire grid polarization layer (WGP) is provided so that excellent light output efficiency can be obtained while providing linearly polarized output light (OL). Accordingly, in some embodiments, a display device (DD) capable of implementing a light field display and having excellent low-reflection characteristics can be provided without causing light loss through a light recycling structure.

[0173] To conclude this detailed description, those skilled in the art will recognize that numerous variations and modifications can be made to the embodiments without substantially departing from the principles, spirit, and scope of the disclosure. Accordingly, the disclosed embodiments are used in a general and descriptive sense, not for purposes of limitation.

Claims

1. Display layer; A quantum-dot layer disposed on the display layer and including a color conversion layer including quantum dots and scatterers; and An upper layer disposed on the quantum-dot layer, comprising a phase delay layer and a wire grid polarization layer disposed on the phase delay layer; Display device.

2. In paragraph 1, The upper layer further includes an upper substrate disposed on the wire grid polarizing layer, The above wire grid polarizing layer includes wire grid pattern layers arranged on the lower portion of the upper substrate, Each of the above wire grid pattern layers, A first layer disposed on the upper substrate; a second layer disposed on the first layer; and A third layer disposed on the second layer; comprising; Each of the first layer and the second layer comprises different metal materials. Display device.

3. In paragraph 2, The first layer can absorb at least a portion of the light applied to the first layer, The second layer is capable of reflecting at least a portion of the light applied to the second layer. Display device.

4. In paragraph 2, The first layer comprises molybdenum tantalum oxide (MoTaOx), The second layer comprises aluminum (Al). Display device.

5. In paragraph 4, The thickness of the first layer is in a range of about 350 nm to about 550 nm. Display device.

6. In paragraph 2, The above first layer is in contact with the upper substrate, Display device.

7. In paragraph 6, The upper substrate comprises a glass material, Display device.

8. In paragraph 2, The above phase delay layer comprises a λ / 4 phase difference film. Display device.

9. In paragraph 8, The above phase delay layer and the above wire grid polarization layer are directly adjacent to each other, Display device.

10. In paragraph 2, The upper layer further includes an optical layer disposed on the quantum-dot layer; and a color filter layer disposed on the optical layer; The optical layer and the color filter layer are directly adjacent to each other to form an interface, Display device.

11. In Article 10, The refractive index of the optical layer is greater than the refractive index of the color filter layer and less than the refractive index of the color conversion layer. Display device.

12. In paragraph 1, A first sub-pixel forming a first sub-pixel area in which light of a first color is provided; a second sub-pixel forming a second sub-pixel area in which light of a second color is provided; and a third sub-pixel forming a third sub-pixel area in which light of a third color is provided; comprising: The color conversion layer includes a first color conversion layer arranged in the first sub-pixel area and a second color conversion layer arranged in the second sub-pixel area, The quantum-dot layer further includes a scattering layer disposed within the third sub-pixel area. Display device.

13. In paragraph 12, Each of the first color conversion layer, the second color conversion layer, and the scattering layer includes a scatterer. Display device.

14. In paragraph 1, further comprising a light control layer disposed on the upper layer; The light control layer comprises a variable light-transmitting layer including liquid crystal molecules; and a lens layer disposed on the variable light-transmitting layer and including lenses and an outer layer disposed on the lenses; Display device.

15. In paragraph 14, The light provided by the above display layer is provided as linearly polarized output light and is input to the light control layer, The above lenses and the above outer layer form a boundary surface, The above display device can operate in a 2D image mode for displaying a 2D image or a 3D image mode for displaying a 3D image, When the above display device operates in the 2D image mode, the linearly polarized output light is transmitted without refraction at the boundary surface, When the above display device operates in the 3D image mode, the linearly polarized output light is refracted at the boundary surface. Display device.

16. A display layer including a lower substrate and a pixel circuit layer including a pixel circuit arranged on the lower substrate and a light-emitting element electrically connected to the pixel circuit; A quantum dot layer disposed on the display layer and including a color conversion layer and a scattering layer; and An upper layer disposed on the quantum-dot layer, comprising an optical layer, a color filter layer on the optical layer, a phase delay layer on the color filter layer, a wire grid polarization layer on the phase delay layer, and an upper substrate directly disposed on the wire grid polarization layer; Display device.

17. In paragraph 16, The above phase delay layer comprises a λ / 4 phase difference film. Display device.

18. Light-emitting display layer; A wire grid polarizing layer disposed on the above display layer and including wire grid pattern layers; and; An upper substrate is disposed on the wire grid polarization layer and forms a grid base on which the wire grid pattern layers are disposed; Each of the above wire grid pattern layers includes a first layer directly disposed on the grid base, a second layer on the first layer, and a third layer on the second layer, Each of the first layer and the second layer comprises different metal materials, The first layer can absorb at least a portion of the light applied to the first layer, The second layer is capable of reflecting at least a portion of the light applied to the second layer. Display device.

19. In paragraph 18, The first layer is molybdenum tantalum oxide (MoTaO x ) including The second layer comprises aluminum (Al). Display device.

20. In paragraph 18, The thickness of the first layer is in a range of about 350 nm to about 550 nm. Display device.

Images