Display Devices

Abstract

A display device includes: an optical member; a display panel arranged above the optical member; and a plurality of light emitting units arranged below the optical member and configured to provide a first color light to the optical member, wherein the optical member includes: a supporting substrate having an upper surface and a lower surface and overlapping the light emitting units; a quantum dot layer arranged on the supporting substrate and configured to convert the first color light into a second color light and a third color light; and a color filter directly arranged on at least one of the upper surface and the lower surface of the supporting substrate and having a first transmittance for the first color light having a first incident angle of 0 degrees, and having a second transmittance greater than the first transmittance for the first color light having a second incident angle greater than the first incident angle.

Description

Technical Field

[0001] Exemplary embodiments of the present invention relate generally to a display apparatus, and more particularly, to a display apparatus having improved display quality. Background Art

[0002] A non-emissive type display device DD, such as a liquid crystal display device, generates an image by using light provided from a backlight unit. The backlight unit includes a plurality of light emitting units that emit light. Each of the plurality of light emitting units includes a plurality of light emitting elements.

[0003] The non-emissive type display device DD includes an optical member for improving characteristics of light provided from a light emitting unit The optical member is disposed under a display panel.

[0004] The above information disclosed in this Background section is only for understanding the background of the present inventive concept and therefore it may contain information that does not constitute prior art. Summary of the invention

[0005] The device constructed according to the exemplary embodiment of the present invention can prevent the hot spot phenomenon.

[0006] Additional features of the inventive concept will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concept.

[0007] A display device according to an exemplary embodiment includes: an optical member; a display panel arranged above the optical member; and a plurality of light emitting units arranged below the optical member and configured to provide a first color light to the optical member, wherein the optical member includes: a supporting substrate having an upper surface and a lower surface facing each other in a thickness direction and overlapping with the light emitting units; a quantum dot layer arranged on the supporting substrate and configured to convert the first color light into a second color light and a third color light; and a color filter directly arranged on at least one of the upper surface and the lower surface of the supporting substrate and having a first transmittance for the first color light having a first incident angle of 0 degrees, and having a second transmittance greater than the first transmittance for the first color light having a second incident angle greater than the first incident angle.

[0008] The first transmittance may be about 10% to about 45%.

[0009] A value of the first transmittance for the first color light having the first incident angle may be smaller than a value of the reflectance for the first color light having the first incident angle.

[0010] The first color light may have a wavelength of about 410 nm to about 480 nm.

[0011] The color filter may include a plurality of first layers and a plurality of second layers arranged alternately with each other, each of the first layers may have a refractive index of approximately 1.8 to approximately 2.0 and a thickness of approximately 160 nm to approximately 200 nm at a wavelength of 450 nm, and each of the second layers may have a refractive index of approximately 1.4 to approximately 1.5 and a thickness of approximately 60 nm to approximately 100 nm at a wavelength of 450 nm.

[0012] Each of the first layers may include silicon nitride, and each of the second layers may include silicon oxide.

[0013] The number of laminations of the first layer and the second layer may be about 5 to about 20.

[0014] Each of the light emitting units may include a circuit board having a substantially elongated shape and a plurality of light emitting elements mounted on the circuit board.

[0015] The display device may further include a reflective sheet disposed on the circuit board, the reflective sheet having a plurality of openings corresponding to the light emitting elements, wherein the reflective sheet has a blue color.

[0016] The color filter may overlap a portion of the upper and lower surfaces of the support substrate, the color filter may include a plurality of color filter patterns spaced apart from each other, and each of the color filter patterns may correspond to a corresponding one of the light emitting elements in a plan view.

[0017] Each of the color filter patterns may include a first portion overlapping a corresponding one of the light emitting elements; and a second portion having an area smaller than that of the first portion and not overlapping the corresponding one of the light emitting elements.

[0018] The display device may further include a compensation layer disposed adjacent to the color filter pattern, the compensation layer not overlapping the color filter pattern.

[0019] The color filter may overlap a portion of each of the upper and lower surfaces of the support substrate, and the color filter may include an opening in a region that does not overlap with the light emitting element.

[0020] The display device may further include a compensation pattern filled in the opening.

[0021] The display device may further include: a scattering layer directly disposed on at least one of the upper surface and the lower surface of the support substrate, the scattering layer including a base resin layer and scattering particles mixed with the base resin layer.

[0022] Each of the scattering particles may include TiO 2 、SiO 2 、ZnO、Al 2 O 3 ,BaSO 4、CaCO 3 and ZrO 2 at least one of .

[0023] The scattering particles may have a refractive index of at least 2 and a diameter of about 150 nm to about 400 nm.

[0024] The display device may further include an insulating layer contacting an upper surface of the support substrate and having a refractive index of about 1.3 or less.

[0025] The lower surface of the support substrate may include a concave lens pattern.

[0026] The upper surface of the support substrate may include a convex scattering pattern.

[0027] The display device may further include a passivation layer contacting the convex diffusion pattern of the support substrate and providing a planarized surface.

[0028] The display device may further include a barrier layer contacting at least one of the upper surface and the lower surface of the quantum dot layer and including an inorganic material.

[0029] The supporting substrate may be a glass substrate.

[0030] A display device according to another exemplary embodiment includes: an optical member; a display panel arranged above the optical member; a plurality of light emitting units arranged below the optical member and configured to provide blue light to the optical member; and a protective member accommodating the light emitting units, the optical member and the display panel, wherein the optical member includes: a glass substrate having an upper surface and a lower surface facing each other in a thickness direction and overlapping the light emitting units; a quantum dot layer arranged on the glass substrate and configured to convert blue light into green light and red light; and a color filter arranged directly on at least one of the upper surface and the lower surface of the glass substrate, wherein the color filter includes a plurality of first layers and a plurality of second layers arranged alternately with the plurality of first layers, and each of the first layers has a refractive index of about 1.8 to about 2.0 at a wavelength of 450 nm and has a thickness of about 160 nm to about 200 nm, and each of the second layers has a refractive index of about 1.4 to about 1.5 at a wavelength of 450 nm and has a thickness of about 60 nm to about 100 nm.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the inventive concept.

[0033] Figure 1 is an exploded perspective view of a display apparatus according to an exemplary embodiment.

[0034] Figure 2A is a plan view of a portion of a display apparatus according to an exemplary embodiment.

[0035] Figure 2B is an equivalent circuit diagram of a light emitting unit according to an exemplary embodiment.

[0036] Figure 2C is a cross-sectional view of a light emitting unit according to an exemplary embodiment.

[0037] Figure 2D is a cross-sectional view of a portion of a display apparatus according to an exemplary embodiment.

[0038] Figure 3A is a cross-sectional view of a portion of a color filter according to an exemplary embodiment.

[0039] Figure 3B , Figure 3C , Figure 3D and Figure 3E is a graph illustrating transmittance depending on an incident angle of light incident into a color filter according to an exemplary embodiment.

[0040] Figure 4A is a cross-sectional view illustrating an operation of a color filter according to an exemplary embodiment.

[0041] Figure 4B is a graph illustrating the brightness of light depending on the distance within the effective radius of a light emitting element.

[0042] Figure 5A is a plan view of a portion of a display apparatus according to an exemplary embodiment.

[0043] Figure 5B , Figure 5C and Figure 5D is a plan view of a color filter arranged in a first region according to an exemplary embodiment.

[0044] Figure 5E is a plan view of a portion of a display apparatus according to an exemplary embodiment.

[0045] Fig. 6A is a cross-sectional view of a portion of a display apparatus according to an exemplary embodiment.

[0046] Figure 6B is a cross-sectional view of a portion of a scattering layer according to an exemplary embodiment.

[0047] Figure 6C , Fig.6D and Fig. 6E is a cross-sectional view of a portion of a display apparatus according to an exemplary embodiment.

[0048] Figure 7 is a cross-sectional view of a portion of a display apparatus according to an exemplary embodiment.

[0049] Figure 8 is a cross-sectional view of a portion of a display apparatus according to an exemplary embodiment. DETAILED DESCRIPTION

[0050] In the following description, for the purpose of illustration, many specific details are set forth to provide a comprehensive understanding of each exemplary embodiment or implementation of the present invention. As used herein, "embodiment" and "implementation" are interchangeable words for non-limiting examples of devices or methods using one or more inventive concepts disclosed herein. However, it is to be clear that each exemplary embodiment can be practiced without these specific details or with one or more equivalent settings. In other examples, well-known structures and devices are shown in block diagram form to avoid unnecessary obscurity of each exemplary embodiment. In addition, each exemplary embodiment may be different, but need not be exclusive. For example, the specific shape, configuration and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the present invention.

[0051] Unless otherwise indicated, the illustrated exemplary embodiments should be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise indicated, the features, components, modules, layers, films, panels, regions and / or aspects of the various embodiments (hereinafter individually or collectively referred to as "elements") can be combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0052] The use of cross hatching and / or shading in the drawings is generally provided to make the boundaries between adjacent elements clear. Therefore, unless specified, the presence or absence of cross hatching or shading does not express or indicate any preference or requirement for a specific material, material property, size, ratio, commonality between the illustrated elements, and / or any other characteristics, attributes, properties, etc. of the elements. In addition, in the drawings, the size and relative size of the elements may be exaggerated for clarity and / or description purposes. When the exemplary embodiments may be implemented differently, a particular process may be performed in an order different from the order described. For example, two processes described in succession may be performed substantially simultaneously, or in an order opposite to the order described. In addition, the same reference numerals represent the same elements.

[0053] When an element such as a layer is referred to as being "on" another element or layer, "connected to" or "coupled to" another element or layer, the element may be directly on, directly connected to or coupled to another element or layer, or there may be an intermediate element or layer. However, when an element or layer is referred to as being "directly on" another element or layer, "directly connected to" or "directly coupled to" another element or layer, there is no intermediate element or layer. For this reason, the term "connection" may refer to a physical connection, an electrical connection, and / or a fluid connection with or without an intermediate element. In addition, the D1 axis, the D2 axis, and the D3 axis are not limited to the three axes of a rectangular coordinate system (such as, the x-axis, the y-axis, and the z-axis), but may be interpreted in a broader sense. For example, the D1 axis, the D2 axis, and the D3 axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose 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, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0054] Although the terms "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, the first element discussed below can be referred to as the second element without departing from the teachings of the present disclosure.

[0055] For descriptive purposes, spatially relative terms such as "below," "below," "below," "above," "above," "higher," "side" (e.g., as in "sidewall"), etc. may be used herein, and thereby describe the relationship of one element to another element(s) as illustrated in the figure. Spatially relative terms are intended to encompass different orientations of the device when in use, in operation, and / or in manufacture other than the orientation depicted in the figure. For example, if the device in the figure is flipped, an element described as being "below" or "below" other elements or features would then be "above" the other elements or features. Thus, the exemplary term "below" may include both above and below orientations. Moreover, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are therefore interpreted accordingly.

[0056] The terms used herein are for the purpose of describing specific embodiments, and are not intended to be limiting. As used herein, the singular "one" and "the (described)" are intended to also include plural forms, unless the context clearly indicates otherwise. In addition, the terms "include" and / or "comprise" when used in this specification, specify the existence of the described features, integral bodies, steps, operations, elements, components and / or their combinations, but do not exclude the existence or increase of one or more other features, integral bodies, steps, operations, elements, components and / or their combinations. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and are not used as terms of degree, and are therefore used to consider the inherent deviations in the values ​​that will be recognized by those of ordinary skill in the art, calculated and / or provided.

[0057] Various exemplary embodiments are described herein with reference to cross-sectional illustrations and / or exploded illustrations, which are schematic illustrations of idealized exemplary embodiments and / or intermediate structures. In this way, changes in the shapes of the illustrations as a result of, for example, manufacturing techniques and / or tolerances will be expected. Therefore, the exemplary embodiments disclosed herein should not necessarily be interpreted as being limited to the shapes of the specifically illustrated zones, but will include deviations in shapes caused by, for example, manufacturing. In this way, the zones shown in the figures may actually be schematic, and the shapes of these zones may not reflect the actual shapes of the zones of the device, and are therefore not necessarily intended to be limiting.

[0058] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this disclosure belongs. 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 should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0059] Figure 1 is an exploded perspective view of a display device DD according to an exemplary embodiment.

[0060] refer to Figure 1 , the display device DD includes a display panel 100, a light emitting unit 200, an optical member 300, and protective members 400L and 400U.

[0061] The display panel 100 receives light from the light emitting unit 200 to display an image. The display panel 100 is not particularly limited. For example, the display panel may include a transmissive or semi-transmissive display panel, such as a liquid crystal display panel, an electrophoretic display panel, an electrowetting display panel, and the like.

[0062] The display panel 100 may display an image through the display surface 100-IS. The display surface 100-IS is substantially parallel to a surface defined by the first direction axis DR1 and the second direction axis DR2. The normal direction of the display surface 100-IS (eg, the thickness direction of the display panel 100) is indicated as a third direction axis DR3.

[0063] The front surface (or upper surface) and the rear surface (or bottom surface) of each of the components or units to be described below may be distinguished by the third directional axis DR3. However, the first to third directional axes DR1, DR2, and DR3 illustrated herein may be exemplary and may be changed in some exemplary embodiments. Hereinafter, the first direction to the third direction may be directions indicated by the first to third directional axes DR1, DR2, and DR3, respectively, and represented by the same reference numerals.

[0064] although Figure 1 The display panel 100 is shown to be flat, but the inventive concept is not limited thereto. For example, in some exemplary embodiments, the display panel 100 may be a curved display panel having a curved display surface. The shape of the display panel 100 is not particularly limited.

[0065] In the illustrated exemplary embodiment, the liquid crystal display panel will be described as a display panel 100. The liquid crystal display panel includes a first substrate 110, a second substrate 120 facing the first substrate 110, and a liquid crystal layer arranged between the first substrate 110 and the second substrate 120. The liquid crystal display panel can be divided into a display area and an edge area surrounding the display area. The display area may be an area where an image is displayed, and the edge area may be an area adjacent to the display area and may not display an image. The liquid crystal display panel includes a plurality of pixels arranged in the display area. In an exemplary embodiment, the display device DD may further include a pair of polarizers.

[0066] The signal lines and the pixel circuits of the pixels are arranged on one of the first substrate 110 (hereinafter, referred to as "array substrate") and the second substrate 120. The array substrate may be connected to the main circuit board by a chip-on-film (COF) method. A central control circuit for driving the display panel 100 is arranged on the main circuit board. For example, the central control circuit may be a microprocessor, and the COF may be a data drive circuit. The gate drive circuit may be mounted on the array substrate and integrated with the array substrate in the form of low temperature polysilicon (LTPS).

[0067] The control circuit may control the light emitting unit 200. The control circuit may transmit a dimming signal for controlling the light emitting unit 200 to the light emitting unit 200.

[0068] The light emitting unit 200 is arranged below the display panel 100 and the optical member 300. The light emitting unit 200 may generate a first color light. The first color light may have a wavelength of about 410nm to about 480nm. The first color light may have a peak wavelength of about 440nm to about 460nm. The first color light may be generally blue.

[0069] Each of the light emitting units 200 includes a plurality of light emitting elements 200-L provided as point light sources, and a circuit board 200-P that provides electrical signals to the light emitting elements 200-L. Each of the plurality of light emitting elements 200-L may be provided as a light emitting diode. Each of the light emitting units 200 may include a different number of light emitting elements 200-L therein.

[0070] The display device DD may further include a circuit board electrically connecting the light emitting units 200 to each other. A dimming circuit may be arranged on the circuit board. The dimming circuit may dim the light emitting unit 200 according to a control signal received from the central control circuit. Multiple light emitting elements 200-L may be turned off simultaneously or individually.

[0071] The optical member 300 may be disposed under the display panel 100 and above the light emitting unit 200. The optical member 300 receives the first color light from the light emitting unit 200. The optical member 300 may transmit a portion of the first color light and convert the first color light into second color light and third color light.

[0072] The second color light may have a wavelength of about 500 nm to about 570 nm. The third color light may have a wavelength of about 580 nm to about 675 nm. The second color light may have a peak wavelength of about 515 nm to about 545 nm. The second color light may be substantially green. The third color light may have a peak wavelength of about 610 nm to about 645 nm. The third color light may be substantially red.

[0073] The protective members 400L and 400U include a first protective member 400L disposed below the light emitting unit 200 and a second protective member 400U disposed above the display panel 100. The first protective member 400L and the second protective member 400U may be coupled to each other to accommodate the display panel 100, the light emitting unit 200, and the optical member 300. Each of the first protective member 400L and the second protective member 400U may be made of metal or plastic. The protective members 400L and 400U may further include a mold member.

[0074] The first protective member 400L accommodates the light emitting unit 200. The first protective member 400L includes a bottom part 400L-10 and a plurality of side wall parts 400L-20 bent and extended from the edge of the bottom part 400L-10. The bottom part 400L-10 may have a substantially rectangular shape, and the first protective member 400L may include four side wall parts 400L-20. However, the shape of the first protective member 400L is not particularly limited. The number of the side wall parts 400L-20 may vary, and a step portion may be arranged on the bottom part 400L-10 and the side wall parts 400L-20.

[0075] The light unit 200 may be mounted on the bottom part 400L-10. The light unit 200 (eg, the circuit board 200-P) may substantially cover the entire bottom part 400L-10. For example, the circuit board 200-P may cover approximately 90% or more of the bottom part 400L-10.

[0076] The second protective member 400U may be disposed above the display panel 100 to cover an edge region of the display panel 100. An opening 400U-OP through which an image may be displayed may be defined in the second protective member 400U. The opening 400U-OP may correspond to a display region of the display panel 100.

[0077] The second protective member 400U may be a frame having a substantially rectangular shape. The second protective member 400U may be divided into four sections. The four sections may have an integrated shape or be assembled with each other. Each of the four sections includes a side wall part 400U-10 and a front surface part 400U-20 bent from the side wall part 400U-10. The opening 400U-OP may be substantially defined by the front surface parts 400U-20 of the four sections. In an exemplary embodiment, the front surface part 400U-20 may be omitted.

[0078] Figure 2A is a plan view illustrating a portion of a display device DD according to an exemplary embodiment. Figure 2B is an equivalent circuit diagram of the light emitting unit 200 according to an exemplary embodiment. Figure 2C is a cross-sectional view of a light emitting unit 200 according to an exemplary embodiment. Figure 2D is a cross-sectional view illustrating a portion of a display device DD according to an exemplary embodiment.

[0079] refer to FIG. 2A to FIG. 2C Each of the light emitting units 200 includes a light emitting element 200-L and a circuit board 200-P. FIG. 2A to FIG. 2C In FIG. 2 , a part of the light emitting unit 200 is not shown. Figure 2BAs shown, the light emitting elements 200 -L are respectively connected to the signal lines 200 -SL so as to be dimmable.

[0080] like Figure 2A and Figure 2B As shown, each of the circuit boards 200-P has a shape that substantially extends in the first direction DR1. Figure 2C As shown, the circuit board 200 -P includes at least one insulating layer 200 -I and at least one circuit layer 200 -S. Figure 2C A multilayer circuit board 200-P according to an exemplary embodiment is shown, in which two insulating layers 200-I and two circuit layers 200-S are alternately laminated. The circuit layer 200-S may include a plurality of conductive patterns. The conductive patterns may include Figure 2B Signal line 200-SL.

[0081] The uppermost circuit layer 200-S of the two circuit layers 200-S is covered by a protective layer 200-SR. The protective layer 200-SR provides an outer surface of the circuit board 200-P. The uppermost circuit layer 200-S includes a connection terminal connected to the signal line 200-SL. The protective layer 200-SR includes an opening 200-SRO exposing the connection terminal.

[0082] Each of the light emitting elements 200-L may include a light emitting diode LED. The light emitting diode LED generates light in response to a driving voltage applied through the first electrode ED1 and the second electrode ED2. The light emitting diode LED may have a structure in which an n-type semiconductor layer, an active layer, and a p-type semiconductor layer are sequentially laminated.

[0083] The first electrode ED1 is connected to one of the connection terminals, and the second electrode ED2 is connected to the other of the connection terminals. The first electrode ED1 and the second electrode ED2 may be connected to the connection terminals through wirings WR1 and WR2, respectively. The light emitting diode LED may be attached to the protective layer 200-SR through an adhesive member AD.

[0084] Each of the light emitting elements 200 -L may further include an encapsulation member EC that protects the light emitting diode LED. The encapsulation member EC may prevent the wirings WR1 and WR2 from being short-circuited or oxidized. The encapsulation member EC may include a resin material such as epoxy resin.

[0085] like Figure 2D As shown, the optical member 300 includes a support substrate 300 -G, a quantum dot layer 300 -Q, barrier layers 300 -B1 and 300 -B2 , a protective layer 300 -P, and a color filter 300 -F. Figure 2DThe illustrated lamination order of the support substrate 300 -G, the quantum dot layer 300 -Q, the barrier layers 300 -B1 and 300 -B2 , the protective layer 300 -P, and the color filter 300 -F is merely exemplary, and the lamination order thereof may be variously modified in other exemplary embodiments.

[0086] The support substrate 300-G supports the functional layer of the optical member 300. For example, the support substrate 300-G may be a glass substrate. However, the inventive concept is not limited thereto, and in some exemplary embodiments, the support substrate 300-G may be a transparent and heat-resistant synthetic resin substrate.

[0087] The glass substrate 300-G may have a thickness of about 0.3 mm to about 2 mm. Since the glass substrate 300-G has less thermal deformation, defects may not occur even if the optical distance LD between each of the light emitting elements 200-L and the glass substrate 300-G is short. The optical distance LD may be about 3 mm to about 10 mm.

[0088] In the illustrated exemplary embodiment, the quantum dot layer 300-Q is directly disposed on the upper surface 300-US of the glass substrate 300-G. As used herein, element A being "directly disposed" on element B may mean that no adhesive layer is disposed between elements A and B, and elements A and B may or may not be in contact with each other. In the illustrated exemplary embodiment, the quantum dot layer 300-Q is not formed by attaching a separate sheet, but is formed on the glass substrate 300-G.

[0089] The quantum dot layer 300-Q may include a base resin BR and quantum dots Q1 and Q2 mixed (or dispersed) in the base resin BR. The base resin BR may be a medium in which the quantum dots Q1 and Q2 are dispersed. Typically, the base resin BR may include various resin compositions or binders. However, the inventive concept is not limited thereto. As used herein, a medium capable of dispersing quantum dots Q1 and Q2 may be referred to as a base resin BR, regardless of its name, additional other functions, constituent materials, etc. The base resin BR may be a polymer resin. For example, the base resin BR may include acrylic resins, polyurethane resins, silicone resins, and epoxy resins. The base resin BR may be transparent.

[0090] Quantum dots Q1 and Q2 may be particles that convert the wavelength of light provided from the light source member. Each of the quantum dots Q1 and Q2 may be a material having a crystal structure having a size of several nanometers. The quantum dots may be composed of hundreds to thousands of atoms to provide a quantum confinement effect, in which the energy band gap increases due to the small size. When light of a wavelength having an energy greater than the energy of the band gap is incident on the quantum dots Q1 and Q2, the quantum dots Q1 and Q2 may absorb the light and become an excited state to emit light having a specific wavelength, and then become a ground state. The emitted light has a value corresponding to the band gap. When the size and composition of the quantum dots Q1 and Q2 are adjusted, the luminescence characteristics due to the quantum confinement effect may be adjusted.

[0091] Each of the quantum dots Q1 and Q2 may be selected from a group consisting of a II-VI compound, a III-V compound, a IV-VI compound, a group IV element, a group IV compound, and combinations thereof.

[0092] The II-VI group compound may be selected from: a binary compound selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and combinations thereof; a binary compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, Cd A ternary compound selected from the group consisting of HgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and a combination thereof; and a quaternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and a combination thereof.

[0093] The III-V compounds can be selected from: binary compounds selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and combinations thereof; ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and combinations thereof; and quaternary compounds selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and combinations thereof. The IV-VI group compound may be selected from: a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and combinations thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and combinations thereof; and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and combinations thereof. The IV group element may be selected from the group consisting of Si, Ge and combinations thereof. The IV group compound may be a binary compound selected from the group consisting of SiC, SiGe and combinations thereof.

[0094] The binary compound, the ternary compound, and the quaternary compound may exist in the particle at a uniform concentration, or in the particle whose concentration distribution is divided into a partially different state.

[0095] Each of the quantum dots Q1 and Q2 may have a core-shell structure including a core and a shell surrounding the core. Alternatively, the quantum dots may have a core / shell structure in which one quantum dot surrounds another quantum dot. The interface between the core and the shell may have a concentration gradient in which an element present in the shell has a concentration that gradually decreases toward the center.

[0096] Each of the quantum dots Q1 and Q2 may have particles, each of which has a nanometer-scale size. Each of the quantum dots Q1 and Q2 may have a half-maximum full width (FWHM) of an emission wavelength spectrum of about 45 nm or less (preferably about 40 nm or less, more preferably about 30 nm or less). Within this range, color purity and color reproducibility may be improved. In addition, light emitted by the quantum dots Q1 and Q2 may be emitted in all directions to improve the optical viewing angle.

[0097] In addition, each of the quantum dots Q1 and Q2 has a shape commonly used in the art, and is not particularly limited. In some exemplary embodiments, the quantum dots may have a spherical shape, a pyramidal shape, a multi-arm shape, a cubic nanoparticle shape, a nanotube shape, a nanowire shape, a nanofiber shape, a nanoplate-like particle shape, etc.

[0098] In an exemplary embodiment, the quantum dot layer 300-Q may include a plurality of quantum dots Q1 and Q2 that convert incident light into light having wavelengths different from each other. The plurality of quantum dots Q1 and Q2 may include a first quantum dot Q1 that converts a first color light LB into a second color light, and a second quantum dot Q2 that converts the first color light LB into a third color light. The first color light, the second color light, and the third color light emitted from the quantum dot layer 300-Q may be provided to the display panel 100 (see Figure 1 ) of white light.

[0099] The barrier layers 300-B1 and 300-B2 protect the quantum dot layer 300-Q from external moisture. In this exemplary embodiment, two barrier layers 300-B1 and 300-B2 arranged on the upper surface and the lower surface of the quantum dot layer 300-Q, respectively, are illustrated as an example. Each of the barrier layers 300-B1 and 300-B2 may be an inorganic layer. Each of the barrier layers 300-B1 and 300-B2 may include silicon oxide, silicon nitride, and silicon oxynitride. In an exemplary embodiment, at least one of the two barrier layers 300-B1 and 300-B2 may be omitted.

[0100] The protective layer 300-P may be disposed on the quantum dot layer 300-Q and contact the upper barrier layer 300-B2. The protective layer 300-P may include an organic layer. In some exemplary embodiments, the protective layer 300-P may be omitted.

[0101] The color filter 300-F transmits a portion of the first color light LB and reflects a portion of the first color light LB. The transmittance may vary according to the incident angle of the first color light LB. The color filter 300-F reflects a portion of the first color light LB incident into the region VA (hereinafter referred to as the "vertical region") to guide the reflected first color light LB to the peripheral region of the vertical region VA, the region VA being closest to the light emitting element 200-L and having the same area as the light emitting element 200-L. In this way, a hot spot phenomenon may be prevented from occurring in the vertical region VA. The hot spot phenomenon is a phenomenon in which light is concentrated in only a portion of the region of the display panel (such as a portion overlapping with the light emitting element 200-L). The color filter 300-F may also guide the first color light LB incident into the vertical region VA and the first color light LB incident into the peripheral region of the vertical region VA to other regions.

[0102] According to the illustrated exemplary embodiment, the direct type light emitting unit 200 may provide white light to the display panel 100 (see Figure 1 ) to achieve an image with high brightness.

[0103] The display device DD according to the exemplary embodiment may further include a reflective sheet RS. The reflective sheet RS is disposed on the plurality of light emitting units 200 and has a plurality of openings RS-O corresponding to the light emitting elements 200-L formed therein.

[0104] The reflective sheet RS may have a blue color that reflects blue light. The reflective sheet RS may include a resin layer and a blue organic layer disposed on the resin layer. The organic layer may absorb green light and red light.

[0105] A portion of the first color light LB generated from the light emitting element 200 -L and reflected by the optical member 300 may be reflected again by the reflective sheet RS and incident again into the optical member 300 to improve light efficiency.

[0106] The second color light and the third color light generated from the optical member 300 to propagate to the reflective sheet RS can be absorbed into the reflective sheet RS. In this way, the amount of reflected light incident into the area corresponding to the turned-off light emitting element 200-L can be reduced in the dimming of the light emitting element 200-L. Therefore, the display device DD can have a greater contrast.

[0107] In some exemplary embodiments, Figure 2D The reflective sheet RS may be omitted. In an exemplary embodiment, Figure 2CThe protective layer 200-SR described may have a blue color. The protective layer 200-SR may have substantially the same function as the reflective sheet RS. The circuit board 200-P may substantially cover the bottom member 400L-10 to improve light efficiency. Figure 1 The arrangement relationship between the circuit board 200 -P and the bottom member 400L- 10 is described.

[0108] Figure 3A is a cross-sectional view of a portion of a color filter 300 -F according to an exemplary embodiment. FIG. 3B to FIG. 3E is a graph illustrating transmittance depending on the incident angle of light incident into the color filter 300 -F according to an exemplary embodiment. Figure 4A is a cross-sectional view illustrating the operation of the color filter 300 -F according to an exemplary embodiment. Figure 4B is a graph illustrating the brightness of light depending on the distance within the effective radius of the light emitting element. Figure 3A , the barrier layers 300 - B1 and 300 - B2 are omitted.

[0109] According to the illustrated exemplary embodiment, the color filter 300-F is directly disposed on the upper surface 300-US of the glass substrate 300-G. The color filter 300-F may be formed by coating, printing, or deposition processes.

[0110] refer to Figure 3A , the color filter 300-F includes a plurality of first layers L1 and a plurality of second layers L2 alternately laminated. Each of the plurality of first layers L1 may have a refractive index of about 1.8 to about 2.0 at a wavelength of 450 nm, and each of the plurality of second layers L2 may have a refractive index of about 1.4 to about 1.5 at a wavelength of 450 nm. Each of the plurality of first layers L1 may have a thickness of about 160 nm to about 200 nm, and each of the plurality of second layers L2 may have a thickness of about 60 nm to about 100 nm.

[0111] For example, each of the plurality of first layers L1 and the plurality of second layers L2 may include silicon oxide, silicon nitride, and silicon oxynitride. In some exemplary embodiments, even when the plurality of first layers L1 and the plurality of second layers L2 include the same material, the layers may have different refractive indices according to the deposition conditions of the thin film. In an exemplary embodiment, each of the plurality of first layers L1 may include silicon nitride, and each of the plurality of second layers L2 may include silicon oxide.

[0112] The number of laminated color filters 300 -F may be about five to about twenty. Figure 3AA color filter 300-F having a nine-layer structure including five silicon nitride layers and four silicon oxide layers according to an exemplary embodiment is shown. The five silicon nitride layers may have substantially the same thickness, and the four silicon oxide layers may have substantially the same thickness. The silicon nitride layer may have a thickness of approximately 180 nm, and the silicon oxide layer may have a thickness of approximately 80 nm.

[0113] The transmittance and reflectance of the color filter 300-F may vary according to the incident angle θ of the first color light LB. The color filter 300-F has the lowest transmittance (hereinafter, referred to as the "first transmittance") and the highest reflectance (hereinafter, referred to as the "first reflectance") at an incident angle of about 0 degrees (or the "first incident angle"). With respect to the first color light LB having a second incident angle greater than the first incident angle, the color filter 300-F has a transmittance higher than the first transmittance and a reflectance lower than the first reflectance. In an exemplary embodiment, the first transmittance may be about 10% to about 45%.

[0114] Reference FIG. 3B to FIG. 3E The transmittance of the color filter 300-F to light having a wavelength of about 450 nm is described. Figure 3B As shown, when the incident angle θ is about 0 degrees, the transmittance of the color filter 300 -F may be about 30%. Figure 3C , when the incident angle θ is about 20 degrees, the transmittance of the color filter 300-F may be about 40%. Figure 3D and Figure 3E As shown, when the incident angle θ is about 40 degrees, the transmittance of the color filter 300 -F may be about 95% to about 98%.

[0115] like FIG. 3B to FIG. 3E As shown, the transmittance of the color filter 300-F increases as the incident angle θ of the incident first color light LB increases. When the incident angle θ is a predetermined angle or more, the transmittance of the color filter 300-F may be substantially the same.

[0116] Light that is not transmitted through the color filter 300-F may not be completely reflected, and may be partially absorbed or dissipated. However, this low transmittance may generally refer to high reflectance.

[0117] like Figure 4A As shown, the first color light LB (light incident at a first tilt angle) emitted from the light emitting element 200-L and incident on the color filter 300-F in the vertical direction can be mainly reflected from the color filter 300-F. The reflected light can be reflected by the upper surface 300-US of the glass substrate 300-G (see Figure 2D) or the reflective sheet RS, and then is guided away from the vertical area VA within the effective radius ER. As the incident angle to the color filter 300-F decreases, the guided first color light passes through the color filter 300-F. The effective radius ER can be obtained by measuring the distance at which the light generated in the light emitting element 200-L reaches the area on the upper surface of the optical member 300.

[0118] refer to Figure 4B , the vertical area VA of the display device DD in which the color filter 300-F is arranged may have a brightness "I-1" that is smaller than the brightness "I-0" of the vertical area VA of the display device DD in which the color filter 300-F is not arranged. In this way, the hot spot phenomenon can be reduced. In addition, the effective radius ER1 of the display device DD in which the color filter 300-F is arranged may be greater than the effective radius ER0 of the display device DD in which the color filter 300-F is not arranged. In this way, the brightness variation according to the area can be reduced.

[0119] Figure 5A is a plan view of a portion of a display device DD according to an exemplary embodiment. FIG. 5B to FIG. 5D is a plan view of a shape of a color filter arranged in the first region R1 according to an exemplary embodiment. Figure 5E is a plan view of a portion of a display device DD according to an exemplary embodiment. Figures 1 to 4B Detailed descriptions of substantially the same elements of the described display apparatus will be omitted to avoid redundancy.

[0120] refer to Figure 5A , the color filter 300-F may be arranged on only a portion of the area of ​​the upper surface 300-US of the glass substrate 300-G. The color filter 300-F may include a plurality of color filter patterns FP. Figure 5A , a portion of the region of the upper surface 300 -US on which the plurality of color filter patterns FP are arranged may be designated as a first region R1, and a portion of the region of the upper surface 300 -US on which the plurality of color filter patterns FP are not arranged may be designated as a second region R2.

[0121] The first region R1 may include a reference Figure 4A and Figure 4B The first region R1 may have various shapes. The color filter pattern FP may be aligned with the light emitting element 200-L so that the center of the first region R1 is aligned with the center of the vertical region VA. The color filter pattern FP and the light emitting element 200-L may correspond to each other, such as in a one-to-one manner.

[0122] The color filter pattern FP may be arranged to prevent a hot spot from being generated in the vertical area VA. The color filter pattern FP may be in a limited area to reduce the amount of the first color light LB to be dissipated. In this way, the display device may improve light efficiency.

[0123] like Figure 5B As shown, the color filter pattern FP may have a substantially circular shape. Figure 5C and Figure 5D As shown, the color filter pattern FP may include a first portion P1 and a second portion P2. The first portion P1 may overlap the light emitting element 200-L. The second portion P2 may have an area smaller than that of the first portion P1 and may not overlap the light emitting element 200-L.

[0124] like Figure 5C As shown, the first portion P1 and the second portion P2 may be separated from each other. Figure 5D As shown, the second portion P2 may be provided in plurality and extend from the first portion P1.

[0125] like Figure 5E As shown, the color filter 300-F may be arranged only on a portion of the area of ​​the upper surface 300-US of the glass substrate 300-G. The color filter 300-F may have a second area R2 in an area that does not overlap with the light emitting element 200-L. For example, the second area R2 may be defined by the opening 300-FO. Figure 5E The color filter 300-F may have the same FIG. 5A to FIG. 5D The color filter 300 -F described has essentially the same function.

[0126] FIG. 5A to FIG. 5D The second region R2 of the color filter 300-F shown may include a compensation layer CL, and Figure 5E The second region R2 of the color filter 300-F may include a compensation pattern CP therein. The compensation layer CL and the compensation pattern CP may have substantially the same refractive index. For example, the difference between the refractive index of the compensation layer CL and the refractive index of the color filter 300-F may be within 10% of the refractive index of the color filter 300-F. The compensation layer CL and the compensation pattern CP may not overlap with the color filter 300-F and optically compensate for the area in which the color filter 300-F is not arranged.

[0127] Fig. 6A is a cross-sectional view of a portion of a display device DD according to an exemplary embodiment. Figure 6B is a cross-sectional view of a portion of a scattering layer 300 -S according to an exemplary embodiment. FIG. 6C to FIG. 6E is a cross-sectional view of a portion of a display device DD according to an exemplary embodiment. Figures 1 to 5EDetailed descriptions of substantially the same elements described herein will be omitted to avoid redundancy. FIG. 6A to FIG. 6E In the embodiment, barrier layers 300-B1 and 300-B2 (see Figure 2D ) is omitted.

[0128] refer to Fig. 6A The scattering layer 300-S is directly arranged on the upper surface 300-US of the glass substrate 300-G (see Figure 2D ). The scattering layer 300-S may be formed by a coating or printing process. The scattering layer 300-S may be arranged between the upper surface 300-US of the glass substrate 300-G and the quantum dot layer 300-Q. The scattering layer 300-S may scatter the first color light LB passing through the glass substrate 300-G to prevent the occurrence of a hot spot phenomenon.

[0129] refer to Figure 6B , the scattering layer 300-S may include a base resin BR and scattering particles SP mixed (or dispersed) in the base resin BR. The base resin BR may be a medium in which the scattering particles SP are dispersed. Generally, the base resin BR may include various resin compositions such as a binder.

[0130] refer to Figure 6B The scattering particles SP may include one or more types of particles. The scattering particles SP may have a refractive index of about 2 or more and a diameter of about 150 nm to about 400 nm. The scattering particles SP may include inorganic particles such as TiO 2 、SiO 2 、ZnO、Al 2 O 3 ,BaSO 4 、CaCO 3 or ZrO 2 .

[0131] refer to Figure 6C , the scattering layer 300-S according to the exemplary embodiment may be disposed on the lower surface 300-LS of the glass substrate 300-G. Fig.6D , the color filter 300-F according to an exemplary embodiment may be disposed above the quantum dot layer 300-Q. Fig. 6E According to an exemplary embodiment, the color filter 300-F may be disposed on the quantum dot layer 300-Q, and the scattering layer 300-S may be disposed on the color filter 300-F. Here, the quantum dot layer 300-Q may contact the upper surface 300-US of the glass substrate 300-G (see Figure 2D). In some exemplary embodiments, the protective layer 300-P may be omitted, and the scattering layer 300-S may have substantially the same function as the protective layer 300-P. In exemplary embodiments, a barrier layer may be disposed on an upper surface of the quantum dot layer 300-Q.

[0132] Figure 7 is a cross-sectional view of a portion of a display device DD according to an exemplary embodiment. Figure 8 is a cross-sectional view of a portion of a display device DD according to an exemplary embodiment. Figures 1 to 6C Detailed descriptions of substantially the same elements described will be omitted to avoid redundancy.

[0133] refer to Figure 7 The display device DD may further include an upper surface 300-US contacting the glass substrate 300-G (see Figure 2D ) and an insulating layer 300-I having a refractive index of about 1.3 or less. In the first color light LB propagating toward the vertical area VA, the first color light LB having a large incident angle may be totally reflected by the interface between the glass substrate 300-G and the insulating layer 300-I. In this way, a portion of the first color light LB propagating to the vertical area VA is guided in a direction away from the vertical area VA in a plan view. In this way, a hot spot phenomenon can be prevented.

[0134] refer to Figure 8 According to an exemplary embodiment, the lower surface 300-LS of the glass substrate 300-G may have a concave lens pattern 300-RP formed thereon. The lens pattern 300-RP may diffuse the first color light LB received from the light emitting unit 200. The lens pattern 300-RP may be formed by an etching or embossing process.

[0135] like Figure 8 As shown, the upper surface 300-US of the glass substrate 300-G (see Figure 2D ) may have a convex scattering pattern 300-SP formed thereon. The scattering pattern 300-SP may be irregularly disposed. The scattering pattern 300-SP may scatter the first color light LB received from the light emitting unit 200. The scattering pattern 300-SP may be formed by an etching process.

[0136] A passivation layer 300-PA contacting the scattering pattern 300-SP and providing a planarized surface may be disposed on the upper surface 300-US of the glass substrate 300-G (see Figure 2D The passivation layer 300-PA may include an organic material and be formed by a coating process.

[0137] As described above, the optical member according to the exemplary embodiment can guide the first color light to the peripheral area of ​​the first area to prevent the light from being concentrated in the first area overlapping with the light emitting unit in a plan view. In this way, the hot spot phenomenon can be prevented.

[0138] The glass substrate can support the functional layer of the optical member. Since the glass substrate has less thermal deformation, defects may not occur even if the optical distance between the light emitting element and the glass substrate is short.

[0139] Since the direct type light emitting unit provides white light to the display panel by using the quantum dot layer, the display panel can provide a high brightness image.

[0140] Although specific exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements, as will be apparent to those of ordinary skill in the art.

Claims

1. A display device, comprising: Optical components; A display panel is arranged above the optical member; as well as a plurality of light emitting units arranged below the optical member and configured to provide the optical member with a first color light, The optical component comprises: a supporting substrate having an upper surface and a lower surface facing each other in a thickness direction and overlapping the plurality of light emitting units; a quantum dot layer disposed on the support substrate and configured to convert the first color light into second color light and third color light; and a color filter disposed directly on at least one of the upper surface and the lower surface of the support substrate, and having a first transmittance for the first color light having a first incident angle of 0 degrees, and having a second transmittance greater than the first transmittance for the first color light having a second incident angle greater than the first incident angle, wherein the color filter overlaps only a portion of the upper surface and the lower surface of the support substrate, wherein the color filter includes a plurality of color filter patterns spaced apart from each other, and The display device further comprises: A compensation layer is disposed adjacent to the plurality of color filter patterns, the compensation layer not overlapping the plurality of color filter patterns.

2. The display device according to claim 1, wherein: The first transmittance is 10% to 45%.

3. The display device according to claim 1, wherein: A value of the first transmittance for the first color light having the first incident angle is smaller than a value of the reflectance for the first color light having the first incident angle.

4. The display device according to claim 1, wherein: The first color light has a wavelength of 410 nm to 480 nm.

5. The display device according to claim 1, wherein: The color filter includes a plurality of first layers and a plurality of second layers arranged alternately with each other; Each of the plurality of first layers has a refractive index of 1.8 to 2.0 at a wavelength of 450 nm and a thickness of 160 nm to 200 nm; and Each of the plurality of second layers has a refractive index of 1.4 to 1.5 at the wavelength of 450 nm, and has a thickness of 60 nm to 100 nm.

6. The display device according to claim 5, wherein: Each of the plurality of first layers includes silicon nitride, and each of the plurality of second layers includes silicon oxide.

7. The display device according to claim 5, wherein: The plurality of first layers and the plurality of second layers may be laminated in an amount of 5 to 20.

8. The display device according to claim 1, wherein: Each of the plurality of light emitting units includes a circuit board having an elongated shape and a plurality of light emitting elements mounted on the circuit board.

9. The display device according to claim 8, further comprising: a reflective sheet disposed on the circuit board, the reflective sheet having a plurality of openings corresponding to the plurality of light emitting elements, The reflective sheet has a blue color. 10 . The display device of claim 8 , wherein each of the plurality of color filter patterns corresponds to a corresponding one of the plurality of light emitting elements in a plan view.

11. The display device according to claim 10, wherein each of the plurality of color filter patterns comprises: a first portion overlapping the corresponding one of the plurality of light emitting elements; as well as The second portion has an area smaller than that of the first portion and does not overlap with the corresponding one of the plurality of light emitting elements.

12. The display device according to claim 1, further comprising: A scattering layer is directly disposed on at least one of the upper surface and the lower surface of the support substrate, the scattering layer including a base resin layer and scattering particles mixed with the base resin layer.

13. The display device according to claim 12, wherein: Each of the scattering particles includes at least one of TiO2, SiO2, ZnO, Al2O3, BaSO4, CaCO3, and ZrO2.

14. The display device according to claim 12, wherein: The scattering particles have a refractive index of at least 2 and a diameter of 150 nm to 400 nm.

15. The display device according to claim 1, further comprising: An insulating layer contacts the upper surface of the support substrate and has a refractive index of 1.3 or less.

16. The display device according to claim 1, wherein: The lower surface of the support substrate includes a concave lens pattern.

17. The display device according to claim 1, wherein: The upper surface of the support substrate includes a convex scattering pattern.

18. The display device according to claim 17, further comprising: A passivation layer contacts the convex scattering pattern of the support substrate and provides a planarized surface.

19. The display device according to claim 1, further comprising: A barrier layer contacts at least one of the upper and lower surfaces of the quantum dot layer and includes an inorganic material.

20. The display device according to claim 1, wherein: The supporting substrate is a glass substrate.

21. A display device comprising: Optical components; A display panel is arranged above the optical member; as well as a plurality of light emitting units arranged below the optical member and configured to provide the optical member with a first color light, The optical component comprises: a supporting substrate having an upper surface and a lower surface facing each other in a thickness direction and overlapping the plurality of light emitting units; a quantum dot layer disposed on the support substrate and configured to convert the first color light into second color light and third color light; and a color filter disposed directly on at least one of the upper surface and the lower surface of the support substrate, and having a first transmittance for the first color light having a first incident angle of 0 degrees, and having a second transmittance greater than the first transmittance for the first color light having a second incident angle greater than the first incident angle, wherein each of the plurality of light emitting units comprises a circuit board having an elongated shape and a plurality of light emitting elements mounted on the circuit board, wherein the color filter overlaps only a portion of each of the upper surface and the lower surface of the support substrate, wherein the color filter includes an opening in a region that does not overlap with the plurality of light emitting elements, and The display device further comprises: A compensation pattern is filled in the opening.

22. A display device comprising: Optical components; A display panel is arranged above the optical member; a plurality of light emitting units arranged below the optical member and configured to provide blue light to the optical member; as well as a protective member accommodating the plurality of light emitting units, the optical member and the display panel, The optical component comprises: a glass substrate having an upper surface and a lower surface facing each other in a thickness direction and overlapping the plurality of light emitting units; a quantum dot layer disposed on the glass substrate and configured to convert the blue light into green light and red light; and a color filter disposed directly on only a portion of at least one of the upper surface and the lower surface of the glass substrate, wherein the color filter comprises a plurality of first layers and a plurality of second layers arranged alternately with the plurality of first layers, and Each of the plurality of first layers has a refractive index of 1.8 to 2.0 at a wavelength of 450 nm and a thickness of 160 nm to 200 nm; and each of the plurality of second layers has a refractive index of 1.4 to 1.5 at the wavelength of 450 nm and a thickness of 60 nm to 100 nm.

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