Display device

Abstract

A display device is provided. The display device includes a display panel and a first quantum dot layer disposed on the display panel. Among them, the first quantum dot layer includes a first portion and a second portion extending from one side of the first portion in a first direction, and based on a second direction intersecting the first direction, the width of the second portion can be smaller than the width of the first portion.

Description

Technical Field

[0001] The present invention relates to a display device. Background Art

[0002] Generally, a display device includes a plurality of pixels for displaying an image. Each of the pixels includes an image display element disposed in a pixel region and a driving element disposed around the pixel region. The driving element drives the image display element, and the image display element generates predetermined light to display an image.

[0003] Recently, a display device including a light conversion layer has been developed to improve color purity. The light conversion layer is disposed on the pixels to convert the light generated in the pixels into light having a different wavelength. Each of the light conversion layers is disposed to overlap a corresponding pixel in the pixels. Each of the light conversion layers includes quantum dots for converting the wavelength of light. Summary of the Invention

[0004] Technical Problem

[0005] An object of the present invention is to provide a display device in which light conversion efficiency is improved and the time taken to manufacture a QD layer is reduced.

[0006] Technical Solution

[0007] A display device according to an embodiment of the present invention includes a display panel and a first quantum dot layer disposed on the display panel, wherein the first quantum dot layer includes a first portion and a second portion extending from one side of the first portion in a first direction, and wherein, in a second direction intersecting the first direction, the second portion has a width smaller than the width of the first portion.

[0008] A display device according to an embodiment of the present invention includes: a display panel including a first emission region and a non-emission region around the first emission region; and a first quantum dot layer disposed on the first emission region, wherein the first quantum dot layer includes a first portion and a second portion extending from one side of the first portion in a first direction, and wherein the first portion has a thickness greater than the thickness of the second portion.

[0009] Advantageous Effects

[0010] According to an embodiment of the present invention, each of the first quantum dot layer and the second quantum dot layer may have an "L" shape to improve light conversion efficiency and reduce the time taken to manufacture the first quantum dot layer and the second quantum dot layer. Brief Description of the Drawings

[0011] Figure 1 is a perspective view of a display device according to an embodiment of the present invention.

[0012] Figure 2 showsFigure 1 A cross-sectional view of an example of the display device shown in

[0013] Figure 3 It shows Figure 2 A cross-sectional view of an example of the display panel shown in

[0014] Figure 4 It shows an example of any one pixel provided on Figure 3 the pixel layer shown in

[0015] Figure 5 A cross-sectional view of an example of a part of the display device corresponding to the first emission region, the second emission region, and the third emission region

[0016] Figure 6 It shows Figure 5 A plan view of the first emission region, the second emission region, and the third emission region, the first quantum dot layer, the second quantum dot layer, and the light-transmitting layer shown in

[0017] Figure 7 It is a cross-sectional view taken along line I-I' of Figure 6

[0018] Figure 8 It is a cross-sectional view taken along line II-II' of Figure 6

[0019] Figure 9 It is a cross-sectional view taken along line III-III' of Figure 6

[0020] Figure 10 It is a cross-sectional view taken along line IV-IV' shown in Figure 6

[0021] Figure 11 It is a cross-sectional view taken along line V-V' shown in Figure 6

[0022] Figures 12 to 14 A view for explaining a method for manufacturing the first quantum dot layer

[0023] Figure 15 A view for explaining a method for manufacturing the first quantum dot layer according to a comparative example

[0024] Figures 16 to 22 A view showing the structures of the first emission region, the second emission region, and the third emission region, the first quantum dot layer, the second quantum dot layer, and the light-transmitting layer according to various embodiments of the present invention

[0025] Figure 23 ​​​​​A cross-sectional view showing an example of a first emission region, a second emission region, and a third emission region of a display device according to another embodiment of the present invention.

[0026] Figure 24 A cross-sectional view of a color filter and a quantum dot layer according to another embodiment of the present invention.

[0027] Figures 25 to 29 A view showing the structures of a first quantum dot layer, a second quantum dot layer, and a light-transmitting layer according to various embodiments of the present invention. Detailed Description

[0028] In this specification, it will be understood that when one component (or region, layer, part) is referred to as being "on" another component, "connected to" or "coupled to" another component, the component may be directly disposed on / connected to / coupled to the other component, or there may also be an intervening third component.

[0029] Like reference numerals always denote like elements. Further, in the drawings, the thickness, ratio, and dimensions of the components are exaggerated for clarity of illustration.

[0030] The term "and / or" includes any combination and all combinations of one or more of the related listed items.

[0031] It will be understood that although terms such as "first" and "second" are used herein to describe various elements, these elements should not be limited by these terms. The terms are only used to distinguish one element from other elements. For example, a first element referred to as the first element in an embodiment may be referred to as the second element in another embodiment without departing from the scope of the appended claims. Unless stated to the contrary, the singular form of the terms may include the plural form.

[0032] In addition, terms such as "beneath", "below", "above", "on", etc. are used to explain the relative relationships of the components shown in the drawings. The terms may be relative concepts and are described based on the directions shown in the drawings.

[0033] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Additionally, terms such as those defined in commonly used dictionaries are interpreted to have a meaning consistent with the meaning in the context of the relevant art and are not interpreted in an ideal or overly formal sense unless expressly defined herein.

[0034] The meaning of "including" or "comprising" specifies a property, a fixed quantity, steps, operations, elements, components, or a combination thereof, but does not exclude other properties, fixed quantities, steps, operations, elements, components, or a combination thereof.

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 is a perspective view of a display device according to an embodiment of the present invention.

[0037] Referring to Figure 1 , the display device DD according to an embodiment of the present invention has a rectangular shape having a long side extending in a first direction DR1 and a short side extending in a second direction DR2 intersecting the first direction DR1. However, embodiments of the present invention are not limited thereto. For example, the display device DD may have various shapes such as a circular shape or a polygonal shape.

[0038] Hereinafter, a direction substantially perpendicular to the plane defined by the first direction DR1 and the second direction DR2 is defined as a third direction DR3. In the present specification, the term "viewed from the plane" may represent a state of viewing from the third direction DR3.

[0039] The top surface of the display device DD may be defined as a display surface DS and have a plane defined by the first direction DR1 and the second direction DR2. An image IM generated from the display device DD may be provided to a user through the display surface DS.

[0040] The display surface DS may include a display area DA and a non-display area NDA around the display area DA. An image may be displayed in the display area DA, but may not be displayed in the non-display area NDA. The non-display area NDA may surround the display area DA and define an edge of the display device DD, which is printed with a predetermined color.

[0041] The display device DD may be used for large electronic devices (such as televisions, monitors, or outdoor billboards). Additionally, the display device DD may be used for small or medium-sized electronic devices (such as personal computers, laptop computers, personal digital assistants, car navigation systems, game consoles, smart phones, tablet PCs, and cameras). However, the above devices are only exemplified as exemplary embodiments, and thus, unless departing from the spirit and scope of the present invention, the display device DD may be applicable to other electronic devices.

[0042] Figure 2 is an exemplary cross-sectional view of Figure 1 the display device.

[0043] Referring to Figure 2, the display device DD includes a display panel DP, an input sensing unit ISP, a light conversion unit LCP, a window WIN, a printed layer PIT, a protective film PFM, a cushion layer CSL, and first to fourth adhesives ADH1 to ADH4.

[0044] The display panel DP may include a display area DA and a non-display area NDA around the display area DA. The display panel DP may be a flexible display panel. For example, the display panel DP may include a plurality of electronic components disposed on a flexible substrate. The display panel DP may generate light for displaying an image. The light may be generated in the display area DA.

[0045] The display panel DP according to an embodiment of the present invention may be an emissive display panel, but is not limited thereto. For example, the display panel DP may be an organic light-emitting display panel or a quantum dot light-emitting display panel. The emission layer of the organic light-emitting display panel may include an organic light-emitting material. The emission layer of the quantum dot light-emitting display panel may include quantum dots, quantum rods, etc. Hereinafter, the display panel DP is described as an organic light-emitting display panel.

[0046] The input sensing unit ISP may be disposed on the display panel DP. The input sensing unit ISP may include a plurality of sensing units (not shown) for sensing an external input. The sensing unit may sense an external input in a capacitive manner. When manufacturing the display panel DP, the input sensing unit ISP may be directly manufactured on the display panel DP. However, the embodiments of the present invention are not limited thereto, and the input sensing unit ISP may be configured to be manufactured as a panel separated from the display panel DP, and then it may be attached to the display panel DP through an adhesive. In addition, in the embodiments of the present invention, the input sensing unit ISP may be omitted.

[0047] The light conversion unit LCP may be disposed on the input sensing unit ISP. The light conversion unit LCP may receive the light generated by the display panel DP to convert the color of the received light. In addition, the light conversion unit LCP may reduce the reflection of external light. The above configuration will be described in detail hereinafter.

[0048] The window WIN may be disposed on the light conversion unit LCP. The window WIN may protect the display panel DP, the input sensing unit ISP, and the light conversion unit LCP from external scratches and impacts. The image generated in the display panel DP may pass through the window WIN and then be provided to the user.

[0049] The protective film PFM may be disposed below the display panel DP. The protective film PFM may be defined as a protective substrate. The protective film PFM may protect the lower part of the display panel DP. The protective film PFM may include a flexible plastic material. For example, the protective substrate PFM may include polyethylene terephthalate (PET).

[0050] The cushion layer CSL can be disposed under the protective film PFM. The cushion layer CSL can absorb external impacts applied to the lower part of the display panel DP to protect the display panel DP. The cushion layer CSL can include a foam sheet having a predetermined elasticity.

[0051] The printing layer PIT can be superimposed on the non-display area NDA and disposed on the bottom surface of the window WIN facing the display panel DP. The printing layer PIT can have a predetermined color, for example, a black color. The non-display area NDA can be printed with a predetermined color through the printing layer PIT.

[0052] The first adhesive ADH1 can be disposed between the window WIN and the light conversion part LCP. The window WIN and the light conversion part LCP can be joined to each other through the first adhesive ADH1. The second adhesive ADH2 can be disposed between the light conversion part LCP and the input sensing part ISP. The light conversion part LCP and the input sensing part ISP can be joined to each other through the second adhesive ADH2.

[0053] The third adhesive ADH3 can be disposed between the display panel DP and the protective film PFM. The display panel DP and the protective film PFM can be joined to each other through the third adhesive ADH3. The fourth adhesive ADH4 can be disposed between the protective film PFM and the cushion layer CSL. The protective film PFM and the cushion layer CSL can be joined to each other through the fourth adhesive ADH4.

[0054] The first adhesive ADH1 can include an optically clear adhesive. Each of the second adhesive ADH2, the third adhesive ADH3, and the fourth adhesive ADH4 can include a pressure-sensitive adhesive. In the third direction DR3, the first adhesive ADH1 can have a thickness greater than that of each of the second adhesive ADH2, the third adhesive ADH3, and the fourth adhesive ADH4.

[0055] Figure 3 is a cross-sectional view showing Figure 2 an example of the display panel shown in

[0056] Referring to Figure 3 , the display panel DP can include a first substrate SUB1, a pixel layer PXL disposed on the first substrate SUB1, and a thin film encapsulation layer TFE disposed on the first substrate SUB1 to cover the pixel layer PXL.

[0057] The first substrate SUB1 can include a display area DA and a non-display area NDA around the display area DA. The first substrate SUB1 can include a flexible plastic material. For example, the first substrate SUB1 can include polyimide (PI).

[0058] The pixel layer PXL may be disposed in the display area DA of the first substrate SUB1. The pixel layer PXL may include a plurality of pixels. Each of the pixels may include a transistor and a light-emitting element connected to the transistor.

[0059] Figure 4 is a cross-sectional view showing an example of any one pixel in the pixel layer shown in Figure 3 above.

[0060] Referring to Figure 4 , the pixel PX may include a light-emitting element OLED and a transistor TR connected to the light-emitting element OLED. The light-emitting element OLED may include a first electrode AE, a second electrode CE, a hole control layer HCL, an electron control layer ECL, and an emission layer EML.

[0061] The transistor TR and the light-emitting element OLED may be disposed on the first substrate SUB1. The display area DA of the display panel DP may include an emission area PA corresponding to each of the pixels PX and a non-emission area NPA surrounding the emission area PA. The light-emitting element OLED may be disposed in the emission area PA, and the transistor TR may be disposed in the non-emission area NPA.

[0062] A buffer layer BFL may be disposed on the first substrate SUB1, and a semiconductor layer SM of the transistor TR may be disposed on the buffer layer BFL.

[0063] The semiconductor layer SM may include amorphous silicon, polycrystalline silicon, or an oxide semiconductor. Although Figure 4 not shown in the figure, the semiconductor layer SM may include a source region, a drain region, and a channel region between the source region and the drain region.

[0064] A first insulating layer INS1 may be disposed on the buffer layer BFL to cover the semiconductor layer SM. A gate electrode GE of the transistor TR that overlaps with the semiconductor layer SM may be disposed on the first insulating layer INS1. The gate electrode GE may be disposed to overlap with the channel region of the semiconductor layer SM. A second insulating layer INS2 may be disposed on the first insulating layer INS1 to cover the gate electrode GE.

[0065] A source electrode SE and a drain electrode DE of the transistor TR may be disposed on the second insulating layer INS2 to be spaced apart from each other. The source electrode SE may be connected to the source region of the semiconductor layer SM through a first contact hole CH1 defined in each of the first insulating layer INS1 and the second insulating layer INS2. The drain electrode DE may be connected to the drain region of the semiconductor layer SM through a second contact hole CH2 defined in each of the first insulating layer INS1 and the second insulating layer INS2.

[0066] The third insulating layer INS3 may be disposed on the second insulating layer INS2 to cover the source electrode SE and the drain electrode DE of the transistor TR. The connection electrode CNE may be disposed on the third insulating layer INS3. The connection electrode CNE may be connected to the drain electrode DE through a third contact hole CH3 defined in the third insulating layer INS3.

[0067] The fourth insulating layer INS4 may be disposed on the third insulating layer INS3 to cover the connection electrode CNE. The first electrode AE may be disposed on the fourth insulating layer INS4. The first electrode AE may be connected to the connection electrode CNE through a fourth contact hole CH4 defined in the fourth insulating layer INS4.

[0068] The pixel defining layer PDL exposing a predetermined portion of the first electrode AE may be disposed on the first electrode AE and the fourth insulating layer INS4. The predetermined portion of the first electrode AE may be defined in the pixel defining layer PDL through an opening PX_OP by which it is exposed.

[0069] The hole control layer HCL may be disposed on the first electrode AE and the pixel defining layer PDL. The hole control layer HCL may be commonly disposed in the emission region PA and the non-emission region NPA. The emission layer EML may be disposed on the hole control layer HCL. The emission layer EML may be disposed in a region corresponding to the opening PX_OP. The emission layer EML may generate first light. For example, the first light may be blue light.

[0070] The electron control layer ECL may be disposed on the hole control layer HCL to cover the emission layer EML. The electron control layer ECL may be commonly disposed in the emission region PA and the non-emission region NPA. The second electrode CE may be disposed on the electron control layer ECL.

[0071] The thin film encapsulation layer TFE may be disposed on the second electrode CE to cover the light emitting element OLED. The pixel layer between the first substrate SUB1 and the thin film encapsulation layer TFE may be defined as the pixel layer PXL. The thin film encapsulation layer TFE may include at least two inorganic layers and an organic layer disposed between the at least two inorganic layers. The inorganic layer may protect the pixel layer PXL from moisture / oxygen. The organic layer may protect the pixel layer PXL from foreign substances such as dust particles.

[0072] A first voltage may be applied to the first electrode AE, and a second voltage having a level lower than the level of the first voltage may be applied to the second electrode CE. Holes and electrons injected into the emission layer EML may combine with each other to form excitons. When the excitons can transition to the ground state, the light emitting element OLED may emit light. The light emitting element OLED may emit light to display an image.

[0073] Figure 5It is a cross-sectional view showing an example of a portion of a display device corresponding to a first emission region, a second emission region, and a third emission region.

[0074] For ease of description, in Figure 5 , the window WIN, the protective film PFM, and the cushion layer CSL are omitted. In addition, the detailed structure of the pixel PX is omitted, and the first emission region PA1, the second emission region PA2, and the third emission region PA3 of the display panel DP are shown.

[0075] Referring to Figure 5 , the display panel DP may include a first emission region PA1, a second emission region PA2, a third emission region PA3, and a non-emission region NPA disposed around each of the first emission region PA1, the second emission region PA2, and the third emission region PA3.

[0076] Figure 4 The emission region PA shown in

[0077] may be any one of the first emission region PA1, the second emission region PA2, and the third emission region PA3. The first emission region PA1, the second emission region PA2, and the third emission region PA3 may generate first light L1. For example, the first light L1 may be blue light.

[0078] The light conversion unit LCP may include a second substrate SUB2, a first quantum dot layer QDL1 and a second quantum dot layer QDL2, a light transmissive layer LTL, a first color filter CF1, a second color filter CF2, and a third color filter CF3, a black matrix BM, a barrier layer SW, and a first insulating layer LC-IL1 and a second insulating layer LC-IL2.

[0079] The first quantum dot layer QDL1 and the second quantum dot layer QDL2, the light transmissive layer LTL, the first color filter CF1, the second color filter CF2, and the third color filter CF3, the black matrix BM, and the barrier layer SW may be disposed on the bottom surface of the second substrate SUB2 facing the display panel DP. Accordingly, the first quantum dot layer QDL1 and the second quantum dot layer QDL2, the light transmissive layer LTL, the first color filter CF1, the second color filter CF2, and the third color filter CF3, the black matrix BM, and the barrier layer SW may be disposed between the display panel DP and the second substrate SUB2.

[0080] The first color filter CF1 may be stacked with the first emission region PA1, the second color filter CF2 may be stacked with the second emission region PA2, and the third color filter CF3 may be stacked with the third emission region PA3.

[0081] The first color filter CF1 may include a red color filter. The second color filter CF2 may include a green color filter. The third color filter CF3 may include a blue color filter. The first insulating layer LC-IL1 may be disposed under the first color filter CF1, the second color filter CF2, the third color filter CF3, and the black matrix BM.

[0082] An opening OP in which the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL are disposed may be defined in the barrier layer SW. The opening OP may be stacked with the first emission region PA1, the second emission region PA2, and the third emission region PA3. The barrier layer SW may include a first barrier layer SW1 and a second barrier layer SW2 disposed on the first barrier layer SW1. The term "on" may be a relative concept and may mean disposed on the top surface or the bottom surface of a specific structure. For example, the second barrier layer SW2 may be disposed on the bottom surface of the first barrier layer SW1.

[0083] The first barrier layer SW1 may be disposed under the first insulating layer LC-IL1. First openings OP1_1, OP1_2, and OP1_3 stacked with the first emission region PA1, the second emission region PA2, and the third emission region PA3 may be defined in the first barrier layer SW1.

[0084] The second barrier layer SW2 may be disposed under the first barrier layer SW1. Second openings OP2_1, OP2_2, and OP2_3 stacked with the first emission region PA1, the second emission region PA2, and the third emission region PA3 may be defined in the second barrier layer SW2.

[0085] The first barrier layer SW1 and the second barrier layer SW2 may be stacked with the non-emission region NPA. For example, each of the first barrier layer SW1 and the second barrier layer SW2 may have a black color, but the color of each of the first barrier layer SW1 and the second barrier layer SW2 is not limited thereto.

[0086] The first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may be disposed below the first insulating layer LC-IL1. The first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may be disposed in the first openings OP1_1, OP1_2, and OP1_3 and the second openings OP2_1, OP2_2, and OP2_3. The layer in which the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL are disposed may be defined as a light conversion section.

[0087] The first openings OP1_1, OP1_2, and OP1_3 may include a first sub-opening OP1_1 in which the first quantum dot layer QDL1 is disposed, a second sub-opening OP1_2 in which the second quantum dot layer QDL2 is disposed, and a third sub-opening OP1_3 in which the light transmissive layer LTL is disposed. The second openings OP2_1, OP2_2, and OP2_3 may include a fourth sub-opening OP2_1 in which the first quantum dot layer QDL1 is disposed, a fifth sub-opening OP2_2 in which the second quantum dot layer QDL2 is disposed, and a sixth sub-opening OP2_3 in which the light transmissive layer LTL is disposed.

[0088] The first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may be respectively disposed in a first emission region PA1, a second emission region PA2, and a third emission region PA3 so as to overlap the first emission region PA1, the second emission region PA2, and the third emission region PA3, respectively. For example, the first quantum dot layer QDL1 may overlap the first emission region PA1. The second quantum dot layer QDL2 may overlap the second emission region PA2. The light transmissive layer LTL may overlap the third emission region PA3.

[0089] The first sub-opening OP1_1 and the fourth sub-opening OP2_1 may overlap the first emission region PA1. The second sub-opening OP1_2 and the fifth sub-opening OP2_2 may overlap the second emission region PA2. The third sub-opening OP1_3 and the sixth sub-opening OP2_3 may overlap the third emission region PA3.

[0090] The first light L1 generated in the first emission region PA1, the second emission region PA2, and the third emission region PA3 may be provided to the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL. The first light L1 generated in the first emission region PA1 may be provided to the first quantum dot layer QDL1, and the first light L1 generated in the second emission region PA2 may be provided to the second quantum dot layer QDL2. The first light L1 generated in the third emission region PA3 may be provided to the light transmissive layer LTL.

[0091] The first quantum dot layer QDL1 can convert the first light L1 into a second light L2. The second quantum dot layer QDL2 can convert the first light L1 into a third light L3. For example, the second light L2 can be red light, and the third light L3 can be green light. The first quantum dot layer QDL1 can include first quantum dots (not shown), and the second quantum dot layer QDL2 can include second quantum dots (not shown). The light transmissive layer LTL can include light scattering particles (not shown) for scattering light.

[0092] The first quantum dots can convert the first light L1 with a blue wavelength band into a second light L2 with a red wavelength band. The second quantum dots can convert the first light L1 with a blue wavelength band into a third light L3 with a green wavelength band. The first quantum dots and the second quantum dots can scatter the second light L2 and the third light L3. The light transmissive layer LTL can transmit the first light L1 without performing a light conversion operation. The light transmissive layer LTL can scatter the first light L1 through the light scattering particles to emit light. In addition, the light scattering particles can be disposed in at least one of the first quantum dot layer QDL1 and the second quantum dot layer QDL2.

[0093] The first quantum dot layer QDL1 can emit the second light L2, the second quantum dot layer QDL2 can emit the third light L3, and the light transmissive layer LTL can emit the first light L1. Therefore, a predetermined image can be displayed by the second light L2, the third light L3, and the first light L1 that display red, green, and blue.

[0094] A portion of the first light L1 can be provided to the first color filter CF1 by passing through the first quantum dot layer QDL1 without being light-converted by the first quantum dots. That is, since the first light L1 does not contact the first quantum dots, the first light L1 that is not converted into the second light L2 can exist. The first color filter CF1 can block light with different colors. The first light L1 that is not converted in the first quantum dot layer QDL1 can be blocked by the first color filter CF1 with a red color filter and thus may not be emitted upward.

[0095] A portion of the first light L1 can be provided to the second color filter CF2 by passing through the second quantum dot layer QDL2 without being light-converted by the second quantum dots. That is, since the first light L1 does not contact the second quantum dots, the first light L1 that is not converted into the third light L3 can exist. The second color filter CF2 can block light with different colors. The first light L1 that is not converted in the second quantum dot layer QDL2 can be blocked by the second color filter CF2 with a green color filter and thus may not be emitted upward.

[0096] External light is provided to the display panel from the upper side of the display device. The external light may be white light. The white light may include red light, green light, and blue light. If the first color filter CF1, the second color filter CF2, and the third color filter CF3 are not used, the external light is reflected inside the display panel DP and then provided to the external user as it is. In this case, the external light is viewed by the user, such as light reflected from a mirror.

[0097] The first color filter CF1, the second color filter CF2, and the third color filter CF3 can prevent the external light from being reflected. For example, the first color filter CF1, the second color filter CF2, and the third color filter CF3 can filter the external light into light having red, green, and blue colors.

[0098] Specifically, the green light and the blue light in the external light provided to the first color filter CF1 can be blocked by the first color filter CF1 including a red color filter. Therefore, the external light provided to the first color filter CF1 can be filtered by the first color filter CF1 into red light that is the same as the light emitted from the first quantum dot layer QDL1.

[0099] The red light and the blue light in the external light provided to the second color filter CF2 can be blocked by the second color filter CF2 serving as a green color filter. Therefore, the external light provided to the second color filter CF2 can be filtered by the second color filter CF2 into green light that is the same as the light emitted from the second quantum dot layer QDL2.

[0100] The red light and the green light in the external light provided to the third color filter CF3 can be blocked by the third color filter CF3 serving as a blue color filter. Therefore, the external light provided to the third color filter CF3 can be filtered by the third color filter CF3 into blue light that is the same as the light emitted from the light transmissive layer LTL. As a result, the reflection of the external light can be reduced.

[0101] The black matrix BM can block unnecessary light in the non-emitting area NPA. Each of the first blocking layer SW1 and the second blocking layer SW2 having a black color can also have a function similar to that of the black matrix BM to block unnecessary light in the non-emitting area NPA.

[0102] For example, in order to prevent the reflection of the external light, the first color filter CF1, the second color filter CF2, and the third color filter CF3 are used, but embodiments of the present invention are not limited thereto. For example, the display device DD may include a polarizing film provided on the display panel DP instead of the first color filter CF1, the second color filter CF2, and the third color filter CF3 to prevent the reflection of the external light.

[0103] A polarizing film can be defined as an external light antireflection film. The polarizing film can reduce the reflectance of external light incident on the display panel from the upper side of the display device. For this operation, for example, the polarizing film can include a phase retarder and / or a polarizer.

[0104] Figure 6 is a plan view showing Figure 5 the first emission region, the second emission region, and the third emission region, the first quantum dot layer and the second quantum dot layer, and the light-transmitting layer shown in

[0105] For example, in Figure 6 the non-emission region NPA is shown in gray color.

[0106] Referring to Figure 6 , the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light-transmitting layer LTL can be arranged in the second direction DR2. When viewed in a plan view, the first emission region PA1 can have a surface area smaller than the surface area of the first quantum dot layer QDL1. When viewed in a plan view, the second emission region PA2 can have a surface area smaller than the surface area of the second quantum dot layer QDL2. When viewed in a plan view, the third emission region PA3 can have a surface area smaller than the surface area of the light-transmitting layer LTL.

[0107] Each of the first emission region PA1, the second emission region PA2, and the third emission region PA3 can have a rectangular shape, but the shapes of the first emission region PA1, the second emission region PA2, and the third emission region PA3 are not limited thereto. The third emission region PA3 can have a rectangular shape that extends longer in the first direction DR1.

[0108] The first quantum dot layer QDL1 can include a first portion PT1 and a second portion PT2 extending from the first portion PT1. Each of the first portion PT1 and the second portion PT2 can have a rectangular shape, but the shapes of the first portion PT1 and the second portion PT2 are not limited thereto. For example, the second portion PT2 can have a rectangular shape that extends longer in the first direction DR1.

[0109] The second portion PT2 can extend from one side of the first portion PT1 that is opposite to each other in the first direction DR1 of the first portion PT1 in the first direction DR1. The width of the second portion PT2 in the second direction DR2 can be smaller than the width of the first portion PT1. The first emission region PA1 can overlap with the first portion PT1. Although the first portion PT1 is shown as having the same shape as the shape of the first emission region PA1, the present invention is not limited thereto, and the first portion PT1 can have a shape different from the shape of the first emission region PA1. The second portion PT2 can overlap with the non-emission region NPA.

[0110] One side of the first part PT1 extending in the first direction DR1 and one side of the second part PT2 extending in the first direction DR1 may be disposed in the first same line. According to this structure, the first quantum dot layer QDL1 may have a shape in which the shape "L" is vertically inverted. For example, one side of the first part PT1 may indicate the left side of the first part PT1, and one side of the second part PT2 may indicate the left side of the second part PT2.

[0111] The first light L1 generated in the first emission region PA1 may be provided to the first part PT1. The first part PT1 may convert the first light L1 provided from the first emission region PA1 into a second light L2. The second part PT2 may not receive the first light L1. Therefore, the second part PT2 may not perform the light conversion operation for converting the first light L1 into the second light L2.

[0112] The second quantum dot layer QDL2 may include a third part PT3 and a fourth part PT4 extending from the third part PT3. Each of the third part PT3 and the fourth part PT4 may have a rectangular shape, but the shapes of the third part PT3 and the fourth part PT4 are not limited thereto. For example, the fourth part PT4 may have a rectangular shape that extends longer in the first direction DR1.

[0113] The fourth part PT4 may extend in the first direction DR1 from one side of the third part PT3 that is opposite to each other in the first direction DR1 of the third part PT3. The width of the fourth part PT4 in the second direction DR2 may be smaller than the width of the third part PT3. The third part PT3 may face the second part PT2 in the second direction DR2. The fourth part PT4 may face the first part PT1 in the second direction DR2. The second emission region PA2 may overlap with the third part PT3. Although the third part PT3 is shown as having the same shape as the shape of the second emission region PA2, the present invention is not limited thereto, and the third part PT3 may have a shape different from the shape of the second emission region PA2. The fourth part PT4 may overlap with the non-emission region NPA.

[0114] One side of the third part PT3 extending in the first direction DR1 and one side of the fourth part PT4 extending in the first direction DR1 may be disposed in the second same line. According to this structure, the second quantum dot layer QDL2 may have a shape in which the shape "L" is inverted from left to right.

[0115] For example, one side of the third part PT3 may indicate the right side of the third part PT3, and one side of the fourth part PT4 may indicate the right side of the fourth part PT4. Therefore, the first same line and the second same line may be opposite to each other in the second direction DR2.

[0116] The first light L1 generated in the second emission region PA2 can be provided to the third part PT3. The third part PT3 can convert the first light L1 provided from the second emission region PA2 into a third light L3. The fourth part PT4 may not receive the first light L1. Accordingly, the fourth part PT4 may not perform an optical conversion operation for converting the first light L1 into the third light L3.

[0117] The light transmissive layer LTL may include a fifth part PT5 extending in a first direction DR1 and a sixth part PT6 extending from the fifth part PT5 in the first direction DR1. The sixth part PT6 may extend from one side of the fifth part PT5 among two sides of the fifth part PT5 that are opposite to each other in the first direction DR1. The third emission region PA3 may overlap with the fifth part PT5, and the sixth part PT6 may overlap with the non-emission region NPA. For example, the fifth part PT5 may have a rectangular shape that extends relatively long in the first direction DR1.

[0118] Each of the first part PT1, the third part PT3, and the fifth part PT5 may have a predetermined area ratio. The surface area of each of the first part PT1, the third part PT3, and the fifth part PT5 may be determined according to the area ratio. The light transmissive layer LTL includes the fifth part PT5 and the sixth part PT6, but the sixth part PT6 may be omitted. In this case, the light transmissive layer LTL may include only the fifth part PT5.

[0119] Figure 7 is a cross-sectional view taken along line I-I' of Figure 6 . Figure 8 is a cross-sectional view taken along line II-II' of Figure 6 . Figure 9 is a cross-sectional view taken along line III-III' of Figure 6 . Figure 10 is a cross-sectional view taken along line IV-IV' shown in Figure 6 . Figure 11 is a cross-sectional view taken along line V-V' shown in Figure 6 .

[0120] For example, Figures 7 to 11 shows a cross-section of the optical conversion part LCP. Further, in Figures 7 to 11 , the first color filter CF1, the second color filter CF2, and the third color filter CF3, the first blocking layer SW1 and the second blocking layer SW2, the first quantum dot layer QDL1 and the second quantum dot layer QDL2, and the light transmissive layer LTL are shown to be provided on the second substrate SUB2.

[0121] Referring to Figure 7 and Figure 8, the first blocking layer SW1 can be arranged to overlap with the non-emitting region NPA. The first sub-opening OP1_1 can be defined in the first blocking layer SW1. The first sub-opening OP1_1 can overlap with the first emitting region PA1. The first sub-opening OP1_1 can be defined to overlap with the first part PT1. The first part PT1 can be arranged in the first sub-opening OP1_1.

[0122] The fourth sub-opening OP2_1 can be defined in the second blocking layer SW2. The fourth sub-opening OP2_1 can be defined to overlap with the first part PT1 and the second part PT2. The first part PT1 and the second part PT2 can be arranged in the fourth sub-opening OP2_1. In the third direction DR3, the thickness TH1 of the first part PT1 can be greater than the thickness TH2 of the second part PT2.

[0123] Referring to Figure 9 and Figure 10 , the second sub-opening OP1_2 can be defined in the first blocking layer SW1. The second sub-opening OP1_2 can overlap with the second emitting region PA2. The second sub-opening OP1_2 can be defined to overlap with the third part PT3. The third part PT3 can be arranged in the second sub-opening OP1_2.

[0124] The fifth sub-opening OP2_2 can be defined in the second blocking layer SW2. The fifth sub-opening OP2_2 can be defined to overlap with the third part PT3 and the fourth part PT4. The third part PT3 and the fourth part PT4 can be arranged in the fifth sub-opening OP2_2. In the third direction DR3, the thickness TH1 of the third part PT3 can be greater than the thickness TH2 of the fourth part PT4.

[0125] Referring to Figure 11 , the third sub-opening OP1_3 defined in the first blocking layer SW1 can overlap with the third emitting region PA3. The third sub-opening OP1_3 can be defined to overlap with the fifth part PT5. The fifth part PT5 can be arranged in the third sub-opening OP1_3.

[0126] The sixth sub-opening OP2_3 can be defined in the second blocking layer SW2. The sixth sub-opening OP2_3 can be defined to overlap with the fifth part PT5 and the sixth part PT6. The fifth part PT5 and the sixth part PT6 can be arranged in the sixth sub-opening OP2_3. In the third direction DR3, the thickness TH1 of the fifth part PT5 can be greater than the thickness TH2 of the sixth part PT6.

[0127] The light-transmitting layer LTL may include an organic material and scattering particles disposed in the organic material. For example, the organic material may include acrylate monomers. However, the present invention is not limited thereto, and the light-transmitting layer LTL may include various polymer materials.

[0128] When viewed in a plan view, in the light conversion unit including quantum dots, since the region for converting light is closer to a square shape, the light conversion efficiency can be improved.

[0129] Although the first quantum dot layer QDL1 extends long in the first direction DR1, the portion that actually performs the light conversion operation may be the first portion PT1 of the first quantum dot layer QDL1. Since the region where the first portion PT1 is provided can have a shape closer to a square shape compared to the entire region of the first quantum dot layer QDL1, the light conversion efficiency of the first quantum dot layer QDL1 can be improved.

[0130] Although the second quantum dot layer QDL2 extends long in the first direction DR1, the portion that actually performs the light conversion operation may be the third portion PT3 of the second quantum dot layer QDL2. Since the region where the third portion PT3 is provided can have a shape closer to a square shape compared to the entire region of the second quantum dot layer QDL2, the light conversion efficiency of the second quantum dot layer QDL2 can be improved.

[0131] Figures 12 to 14 is a view for explaining a method for manufacturing the first quantum dot layer.

[0132] Hereinafter, for example, a method for manufacturing the first quantum dot layer QDL1 will be described, but the second quantum dot layer QDL2 can also be manufactured in a similar manner. Additionally, for ease of explanation, Figure 12 is Figure 8 a perspective view of the first barrier layer SW1 and the second barrier layer SW2 shown in, and Figure 13 is corresponding to Figure 8 a cross-sectional view.

[0133] Referring to Figure 12 , a first barrier layer SW1 in which a first sub-opening OP1_1 is defined can be formed. A second barrier layer SW2 in which a fourth sub-opening OP2_1 is defined can be provided on the first barrier layer SW1.

[0134] Referring to Figure 13 , a head HAD for providing ink INK can be provided on the second substrate SUB2. The head HAD may include a plurality of nozzles NOZ for discharging the ink INK. A predetermined number of nozzles NOZ can be provided on the first sub-opening OP1_1 and the fourth sub-opening OP2_1.

[0135] For example, four nozzles NOZ are provided above the first sub-opening OP1_1 and the fourth sub-opening OP2_1, but the number of nozzles NOZ provided above the first sub-opening OP1_1 and the fourth sub-opening OP2_1 is not limited to this. The number of nozzles NOZ can vary according to the length of the first sub-opening OP1_1 and the fourth sub-opening OP2_1 extending in the first direction DR1.

[0136] The ink INK discharged from the nozzles NOZ can be supplied to the first sub-opening OP1_1 and the fourth sub-opening OP2_1. The ink INK supplied in the first sub-opening OP1_1 and the fourth sub-opening OP2_1 can be cured to form the first quantum dot layer QDL1.

[0137] The top surface of the second barrier layer SW2 can have a liquid-repellent property. As Figure 5 shown, the top surface of the second barrier layer SW2 can be a surface of the second barrier layer SW2 facing the display panel DP. Referring to Figure 5 , one surface of the second barrier layer SW2 can be the bottom surface of the second barrier layer SW2. Since the top surface of the second barrier layer SW2 has a liquid-repellent property, even if the ink INK is supplied to the first sub-opening OP1_1 and the fourth sub-opening OP2_1 slightly in excess, the ink INK will not overflow the second barrier layer SW2.

[0138] Referring to Figure 13 and Figure 14 , when viewed in a plan view, the nozzles NOZ can be arranged in the first direction DR1. The nozzles NOZ can move in the second direction DR2. Some of the nozzles NOZ can supply the ink INK to the first sub-opening OP1_1 and the fourth sub-opening OP2_1.

[0139] Figure 15 is a view for explaining a method for manufacturing the first quantum dot layer according to a comparative example.

[0140] Referring to Figure 15 , the first quantum dot layer QDL1' can have the same surface area as the surface area of the first quantum dot layer QDL1 shown in Figure 14 , and can have a square shape. A barrier layer defining a square opening OP for setting the first quantum dot layer QDL1' can be provided on the substrate. In this case, the first quantum dot layer QDL1' has a width larger than the width of the first quantum dot layer QDL1 in the second direction DR2, and a width smaller than the width of the first quantum dot layer QDL1 in the first direction DR1.

[0141] Referring to Figure 14 and Figure 15, since the first quantum dot layer QDL1' has a width smaller than that of the first quantum dot layer QDL1 in the first direction DR1, the number of nozzles NOZ used to form the first quantum dot layer QDL1' can be reduced. For example, four nozzles NOZ can be used to form Figure 14 the first quantum dot layer QDL1 shown in Figure 15 but three nozzles NOZ can be used to form

[0142] the first quantum dot layer QDL1' shown in Figure 14 In addition, since the first quantum dot layer QDL1' has a width larger than that of the first quantum dot layer QDL1 in the second direction DR2, in order to form the first quantum dot layer QDL1', the moving distance of each of the nozzles NOZ moving in the second direction DR2 can be increased. For example, Figure 14 the nozzle NOZ used to form the first quantum dot layer QDL1 shown in Figure 15 can move a first distance DT1, but

[0143] each of the nozzles NOZ used to form the first quantum dot layer QDL1' shown in

[0144] can move a second distance DT2 greater than the first distance DT1.

[0145] Figures 16 to 22 is a view showing the structures of a first emission region, a second emission region, and a third emission region, a first quantum dot layer and a second quantum dot layer, and a light-transmitting layer according to various embodiments of the present invention.

[0146] Hereinafter, Figures 16 to 22The structures of the first emission regions PA1_1 to PA1_5 and the second emission regions PA2_1 to PA2_5, and the first quantum dot layers QDL1_1 to QDL1_5 and the second quantum dot layers QDL2_1 to QDL2_5 shown in Figure 6 differ from those of the first emission region PA1 and the second emission region PA2, and the first quantum dot layer QDL1 and the second quantum dot layer QDL2 shown in Figures 16 to 22 The structures of the third emission region PA3 and the light transmissive layer LTL shown in Figure 6 are the same as those of the third emission region PA3 and the light transmissive layer LTL shown in

[0147] Referring to Figure 16 , the first quantum dot layer QDL1_1 may include a first part PT1, a second part PT2_1, and a first sub-part SPT1 disposed between the first part PT1 and the second part PT2_1. The first sub-part SPT1 may extend from the first part PT1. The second part PT2_1 may extend from the first sub-part SPT1.

[0148] The first sub-part SPT1 may have the same width as that of the second part PT2_1 in the second direction DR2. The first sub-part SPT1 may have a width smaller than that of the first part PT1 in the second direction DR2. Basically, Figure 6 the first part PT1 shown in

[0149] Figure 17 may protrude toward the second part PT2_1 to form the first sub-part SPT1. Thus, the first sub-part SPT1 may have the same thickness as that of the first part PT1 in the third direction DR3. Figure 16 is a cross-sectional view taken along the line VI-VI' shown in

[0150] Referring to Figure 16 and Figure 17 , the first color filter CF1 is stacked with the first emission region PA1_1, and the first emission region PA1_1 may be stacked with the first part PT1 and the first sub-part SPT1. The second part PT2_1 may be stacked with the non-emission region NPA.

[0151] The first sub-opening OP1_1 may be defined in the first blocking layer SW1. The first sub-opening OP1_1 may be defined to be stacked with the first part PT1 and the first sub-part SPT1. The fourth sub-opening OP2_1 may be defined in the second blocking layer SW2. The fourth sub-opening OP2_1 may be defined to be stacked with the first part PT1, the second part PT2_1, and the first sub-part SPT1.

[0152] The first light L1 generated in the first emission region PA1_1 can be provided to the first part PT1 and the first sub - part SPT1. The first part PT1 and the first sub - part SPT1 can convert the first light L1 provided from the first emission region PA1_1 into a second light L2. The second part PT2_1 may not receive the first light L1.

[0153] Referring Figure 16 , the second quantum dot layer QDL2_1 can include a third part PT3, a fourth part PT4_1, and a second sub - part SPT2 disposed between the third part PT3 and the fourth part PT4_1. The second sub - part SPT2 can extend from the third part PT3. The fourth part PT4_1 can extend from the second sub - part SPT2. The second sub - part SPT2 can have the same width as the width of the fourth part PT4_1 in the second direction DR2. Basically, Figure 6 the third part PT3 shown in

[0154] can protrude toward the fourth part PT4_1 to form the second sub - part SPT2. The second emission region PA2_1 can be superimposed on the third part PT3 and the second sub - part SPT2. The fourth part PT4_1 can be superimposed on the non - emission region NPA. The cross - sectional structure of the second quantum dot layer QDL2_1 can be substantially similar to the cross - sectional structure of the first quantum dot layer QDL1_1. For example, the second sub - opening OP1_2 can be defined to be superimposed on the third part PT3 and the second sub - part SPT2. The fifth sub - opening OP2_2 can be defined to be superimposed on the third part PT3, the fourth part PT4_1, and the second sub - part SPT2.

[0155] The first light L1 generated in the second emission region PA2_1 can be provided to the third part PT3 and the second sub - part SPT2. The third part PT3 and the second sub - part SPT2 can convert the first light L1 provided from the second emission region PA2_1 into a third light L3. The fourth part PT4_1 may not receive the first light L1.

[0156] Referring Figure 18 , the first emission region PA1_2 can be superimposed on the first quantum dot layer QDL1_2. For example, the first emission region PA1_2 can have the same shape as the shape of the first quantum dot layer QDL1_2. The second emission region PA2_2 can be superimposed on the second quantum dot layer QDL2_2. For example, the second emission region PA2_2 can have the same shape as the shape of the second quantum dot layer QDL2_2.

[0157] The first quantum dot layer QDL1_2 may include a first portion PT1 and a second portion PT2_2 extending from one side of the first portion PT1 in a first direction DR1. The width of the second portion PT2_2 in a second direction DR2 may be less than the width of the first portion PT1. The first emission region PA1_2 may overlap with the first portion PT1 and the second portion PT2_2.

[0158] The second quantum dot layer QDL2_2 may include a third portion PT3 and a fourth portion PT4_2 extending from one side of the third portion PT3 in the first direction DR1. The width of the fourth portion PT4_2 in the second direction DR2 may be less than the width of the third portion PT3. The second emission region PA2_2 may overlap with the third portion PT3 and the fourth portion PT4_2.

[0159] Figure 19 is a cross-sectional view taken along Figure 18 line VII-VII'.

[0160] Referring to Figure 18 and Figure 19 , the first sub-opening OP1_1 and the fourth sub-opening OP2_1 may be defined to overlap with the first emission region PA1_2.

[0161] The first sub-opening OP1_1 in which the first portion PT1 and the second portion PT2_2 are provided may be defined in the first blocking layer SW1. The fourth sub-opening OP2_1 in which the first portion PT1 and the second portion PT2_2 are provided may be defined in the second blocking layer SW2. Accordingly, the first portion PT1 and the second portion PT2_2 may be integrally formed to have the same thickness. Although not shown in cross-section, the second sub-opening OP1_2 and the fifth sub-opening OP2_2 for providing the third portion PT3 and the fourth portion PT4_2 are defined to overlap with the second emission region PA2_2.

[0162] Referring to Figure 20 , each of the first emission region PA1_3 and the second emission region PA2_3 may have a rectangular shape. The first emission region PA1_3 may have a rectangular shape that extends longer in the second direction DR2.

[0163] The first quantum dot layer QDL1_3 may include a first portion PT1_1 that overlaps with the first emission region PA1_3 and a second portion PT2_1 that extends from one side of the first portion PT1_1 in the first direction DR1. The first portion PT1_1 may have a rectangular shape and may extend in the second direction DR2. The second portion PT2_1 may overlap with the non-emission region NPA. The width of the second portion PT2_1 in the second direction DR2 may be less than the width of the first portion PT1_1.

[0164] The second quantum dot layer QDL2_3 may have a rectangular shape and may be stacked with the second emission region PA2_3. Different from the second quantum dot layer QDL2 shown in Figure 6 , the second quantum dot layer QDL2_3 may not include the fourth part PT4. The second quantum dot layer QDL2_3 may face the first part PT1_1 in the first direction DR1 and may face the second part PT2_1 in the second direction DR2.

[0165] The first sub-opening OP1_1 may be defined to be stacked with the first part PT1_1. The second sub-opening OP1_2 may be defined to be stacked with the second quantum dot layer QDL2_3. The fourth sub-opening OP2_1 may be defined to be stacked with the first part PT1_1 and the second part PT2_1. The fifth sub-opening OP2_2 may be defined to be stacked with the second quantum dot layer QDL2_3.

[0166] Referring to Figure 21 , each of the first emission region PA1_4 and the second emission region PA2_4 may have a rectangular shape. The second emission region PA2_4 may have a rectangular shape that extends longer in the second direction DR2.

[0167] The second quantum dot layer QDL2_4 may include a third part PT3_1 stacked with the second emission region PA2_4 and a fourth part PT4_1 extending from one side of the third part PT3_1 in the first direction DR1. The third part PT3_1 has a rectangular shape and may extend in the second direction DR2. The fourth part PT4_1 may be stacked with the non-emission region NPA. The width of the fourth part PT4_1 in the second direction DR2 may be smaller than the width of the third part PT3_1.

[0168] The first quantum dot layer QDL1_4 may have a rectangular shape and may be stacked with the first emission region PA1_4. Different from the first quantum dot layer QDL1_2 shown in Figure 18 , the first quantum dot layer QDL1_4 may not include the second part PT2_2. The first quantum dot layer QDL1_4 may face the third part PT3_1 in the first direction DR1 and may face the fourth part PT4_1 in the second direction DR2.

[0169] The first sub-opening OP1_1 may be defined to be stacked with the first quantum dot layer QDL1_4. The second sub-opening OP1_2 may be defined to be stacked with the third part PT3_1. The fourth sub-opening OP2_1 may be defined to be stacked with the first quantum dot layer QDL1_4. The fifth sub-opening OP2_2 may be defined to be stacked with the third part PT3_1 and the fourth part PT4_1.

[0170] Reference Figure 22 , the first quantum dot layer QDL1_5 includes a first part PT1, a second part PT2, and a first sub-part SPT1_1 disposed between the first part PT1 and the second part PT2. The width of the first sub-part SPT1_1 in the second direction DR2 may gradually decrease from the first part PT1 to the second part PT2.

[0171] The first emission region PA1_5 may overlap with the first part PT1 and the first sub-part SPT1_1. The second part PT2 may overlap with the non-emission region NPA. The first sub-opening OP1_1 may be defined to overlap with the first part PT1 and the first sub-part SPT1_1. The fourth sub-opening OP2_1 may be defined to overlap with the first part PT1, the second part PT2, and the first sub-part SPT1_1.

[0172] The second quantum dot layer QDL2_5 may include a third part PT3, a fourth part PT4, and a second sub-part SPT2_1 disposed between the third part PT3 and the fourth part PT4. The width of the second sub-part SPT2_1 in the second direction DR2 may gradually decrease from the third part PT3 to the fourth part PT4.

[0173] The second emission region PA2_5 may overlap with the third part PT3 and the second sub-part SPT2_1. The fourth part PT4 may overlap with the non-emission region NPA. The second sub-opening OP1_2 may be defined to overlap with the third part PT3 and the second sub-part SPT2_1. The fifth sub-opening OP2_2 may be defined to overlap with the third part PT3, the fourth part PT4, and the second sub-part SPT2_1.

[0174] One surface of the first sub-part SPT1_1 may have an inclined surface, and the other surface of the first sub-part SPT1_1 opposite to the one surface of the first sub-part SPT1_1 may extend in the first direction DR1. One surface of the second sub-part SPT2_1 may have an inclined surface, and the other surface of the second sub-part SPT2_1 opposite to the one surface of the second sub-part SPT2_1 may extend in the first direction DR1.

[0175] One surface of the first sub-part SPT1_1 and one surface of the second sub-part SPT2_1 may face each other and may respectively have inclined surfaces extending in a diagonal direction DDR that intersects the first direction DR1 and the second direction DR2. The diagonal direction DDR may be defined as a direction that intersects the first direction DR1 and the second direction DR2 on a plane defined by the first direction DR1 and the second direction DR2.

[0176] Figure 23 It is a cross-sectional view showing examples of a first emission region, a second emission region, and a third emission region of a display device according to another embodiment of the present invention.

[0177] For ease of description, Figure 23 a cross-sectional view corresponding to Figure 5 is shown.

[0178] Referring to Figure 23 , the structures of the display panel DP and the input sensing unit ISP are the same as those of the display panel DP and the input sensing unit ISP shown in Figure 5 , and thus descriptions thereof will be omitted. The first insulating layer LC-IL1' may be provided on the input sensing unit ISP. The first quantum dot layer QDL1, the second quantum dot layer QDL2, the light transmissive layer LTL, and the first barrier layer SW1 and the second barrier layer SW2 are provided on the first insulating layer LC-IL1'.

[0179] The second barrier layer SW2 may be provided on the first barrier layer SW1. First openings OP1_1, OP1_2, and OP1_3 and second openings OP2_1, OP2_2, and OP2_3 that overlap with the first emission region PA1, the second emission region PA2, and the third emission region PA3 may be defined in the first barrier layer SW1 and the second barrier layer SW2, respectively. Figure 23 The first barrier layer SW1 and the second barrier layer SW2 shown in Figure 5 may have a structure in which the first barrier layer SW1 and the second barrier layer SW2 shown in Figure 5 are arranged in an inverted manner, and may basically have the same structure as the structure of the first barrier layer SW1 and the second barrier layer SW2 shown in

[0180] The first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may overlap with the first emission region PA1, the second emission region PA2, and the third emission region PA3, respectively. The first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may be provided in the first openings OP1_1, OP1_2, and OP1_3 and the second openings OP2_1, OP2_2, and OP2_3. The structures of the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL may be substantially the same as the structures of the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light transmissive layer LTL shown in Figure 6 .

[0181] The second insulating layer LC-IL2' may be disposed on the first quantum dot layer QDL1 and the second quantum dot layer QDL2, the light-transmitting layer LTL, and the first barrier layer SW1 and the second barrier layer SW2. The first color filter CF1, the second color filter CF2, and the third color filter CF3, and the black matrix BM may be disposed on the second insulating layer LC-IL2'. The color filters CF1, CF2, and CF3 may be respectively superimposed on the first emission region PA1, the second emission region PA2, and the third emission region PA3. The black matrix BM may be superimposed on the non-emission region NPA. The third insulating layer LC-IL3 may be disposed on the color filters CF1, CF2, and CF3, and the black matrix BM.

[0182] Unlike Figure 5 the display device DD, Figure 23 the display device DD' shown in

[0183] Figure 24 is a cross-sectional view of a color filter and a quantum dot layer according to another embodiment of the present invention.

[0184] For example, Figure 24 shows a cross-section of the first quantum dot layer QDL1 and a cross-section of the first color filter CF1.

[0185] Referring to Figure 24 , the width of the first color filter CF1 may be smaller than the width of the first quantum dot layer QDL1. The width represents a value measured in the horizontal direction, and in Figure 24 , for example, the width may be defined as a value measured in the second direction DR2.

[0186] For example, although the widths of the first color filter CF1 and the first quantum dot layer QDL1 have been described, the width of each of the second color filter CF2 and the third color filter CF3 may also be smaller than the width of each of the second quantum dot layer QDL2 and the light-transmitting layer LTL.

[0187] Figures 25 to 29 is a view showing the structures of the first quantum dot layer and the second quantum dot layer and the light-transmitting layer according to various embodiments of the present invention.

[0188] Hereinafter, the structures of the first quantum dot layers QDL1_6 to QDL1_9, the second quantum dot layers QDL2_6 to QDL2_9, and the light-transmitting layer LTL' shown in Figures 25 to 29 will be described with respect to the differences from the structures of the first quantum dot layer QDL1, the second quantum dot layer QDL2, and the light-transmitting layer LTL shown in Figure 6 .

[0189] Referring to Figure 25The structure of the first quantum dot layer QDL1_6 and the second quantum dot layer QDL2_6 on the plane can be the same as Figure 18 The first quantum dot layer QDL1_2 and the second quantum dot layer QDL2_2 shown in FIG are substantially the same. The structure of the light-transmitting layer LTL' on the plane can be the same as that in FIG. Figure 18 The configuration in which the sixth portion PT6 shown in FIG. 5 is removed from the light transmitting layer LTL is substantially the same.

[0190] The first emission region PA1' may have the same shape as the first quantum dot layer QDL1_6 in a plane. The second emission region PA2' may have the same shape as the second quantum dot layer QDL2_6 in a plane. The third emission region PA3' may have the same shape as the light-transmitting layer LTL' in a plane.

[0191] The first, second, and third openings OP1', OP2', and OP3' may be defined in the blocking member SW'. The first quantum dot layer QDL1_6 may be disposed in the first opening OP1'. The second quantum dot layer QDL2_6 may be disposed in the second opening OP2'. The light-transmitting layer LTL' may be disposed in the third opening OP3'.

[0192] Figure 26 It is along Figure 25 A cross-sectional view taken along line VIII-VIII' shown in FIG.

[0193] Reference Figure 25 and Figure 26 , the first opening OP1' may be defined in the blocking member SW'. Figure 19 The structure shown in Figure 26 In the embodiment, a single barrier SW' may be disposed on the second substrate SUB2, and the first opening OP1' may be defined in the barrier SW'. Although a cross-sectional structure is not shown, the second opening OP2' and the third opening OP3' may also be defined in the barrier SW'.

[0194] Reference Figure 27 The structure of the first quantum dot layer QDL1_7 and the second quantum dot layer QDL2_7 on the plane can be the same as Figure 20 The first quantum dot layer QDL1_3 and the second quantum dot layer QDL2_3 shown in FIG are substantially the same. Figures 27 to 29 The light-transmitting layer LTL' shown in Figure 25 In a plane, the first emission region PA1' may have the same shape as the first quantum dot layer QDL1_7, and the second emission region PA2' may have the same shape as the second quantum dot layer QDL2_7.

[0195] A first opening OP1' for disposing the first quantum dot layer QDL1_7, a second opening OP2' for disposing the second quantum dot layer QDL2_7, and a third opening OP3' for disposing the light-transmitting layer LTL' may be defined in the blocking member SW'. Figure 26 Like the blocking member SW' described in , the first opening OP1', the second opening OP2', and the third opening OP3' may be defined in a single blocking member SW'.

[0196] Reference Figure 28 The structure of the first quantum dot layer QDL1_8 and the second quantum dot layer QDL2_8 on the plane can be the same as Figure 21 The first quantum dot layer QDL1_4 and the second quantum dot layer QDL2_4 shown in FIG are substantially the same. The first emission region PA1′ and the second emission region PA2′ may have the same shapes as the first quantum dot layer QDL1_8 and the second quantum dot layer QDL2_8, respectively, on a plane.

[0197] With reference Figure 26 Like the described blocking member SW', the first opening OP1' for disposing the first quantum dot layer QDL1_8, the second opening OP2' for disposing the second quantum dot layer QDL2_8, and the third opening OP3' for disposing the light-transmitting layer LTL' may be defined in a single blocking member SW'.

[0198] Reference Figure 29 The structure of the first quantum dot layer QDL1_9 and the second quantum dot layer QDL2_9 on the plane can be the same as Figure 22 The first quantum dot layer QDL1_5 and the second quantum dot layer QDL2_5 shown in FIG are substantially the same. The first emission region PA1′ and the second emission region PA2′ may have the same shapes as the first quantum dot layer QDL1_9 and the second quantum dot layer QDL2_9, respectively, on a plane.

[0199] With reference Figure 26 Like the described blocking member SW', the first opening OP1' for disposing the first quantum dot layer QDL1_9, the second opening OP2' for disposing the second quantum dot layer QDL2_9, and the third opening OP3' for disposing the light-transmitting layer LTL' may be defined in a single blocking member SW'.

[0200] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention, provided they fall within the scope of the appended claims and their equivalents. Therefore, to the maximum extent allowed by law, the scope of the present invention is to be determined by the broadest permissible interpretation of the claims and their equivalents, and shall not be restricted or limited by the foregoing detailed description.

[0201] Industrial Applicability

[0202] Since the quantum dot layer used in manufacturing a display device has a specific shape, light conversion efficiency can be improved, and the time taken to manufacture the quantum dot layer can be reduced, thereby manufacturing a display device with improved quality. Therefore, the present invention has high industrial applicability.

Claims

1. A display device, the display device comprising: A display panel; A color filter; A black matrix; And A first quantum dot layer disposed on the display panel, Wherein, the first quantum dot layer includes: a first portion; and a second portion extending from one side of the first portion in a first direction, Wherein, in a second direction intersecting the first direction, the second portion has a width smaller than the width of the first portion, Wherein, the first portion is stacked with the color filter, and the second portion is stacked with the black matrix.

2. The display device according to claim 1, wherein, In a third direction perpendicular to the plane defined by the first direction and the second direction, the first portion has a thickness greater than the thickness of the second portion.

3. The display device according to claim 1, the display device further comprising: A first barrier layer, a first opening is defined in the first barrier layer, and the first portion is disposed in the first opening; And A second barrier layer disposed on the first barrier layer, and a second opening is defined in the second barrier layer, and the first portion and the second portion are disposed in the second opening.

4. The display device according to claim 3, wherein, Each of the first barrier layer and the second barrier layer has a black color.

5. The display device according to claim 1, wherein, The display panel includes: A first emission region; and A non-emission region surrounding the first emission region, Wherein, the first emission region is stacked with the first portion, and the second portion is stacked with the non-emission region.

6. The display device according to claim 5, wherein, The first portion is configured to convert a first light generated in the first emission region into a second light.

7. The display device according to claim 1, the display device further comprising a second quantum dot layer and a light-transmitting layer, the second quantum dot layer and the light-transmitting layer are disposed on the display panel and are arranged together with the first quantum dot layer in the second direction.

8. The display device according to claim 7, wherein, The second quantum dot layer includes: A third portion facing the second portion in the second direction; and A fourth portion extending from one side of the third portion in the first direction and facing the first portion in the second direction, Wherein, in the second direction, the fourth portion has a width smaller than the width of the third portion.

9. The display device according to claim 8, wherein, In a third direction perpendicular to the plane defined by the first direction and the second direction, the third portion has a thickness greater than the thickness of the fourth portion.

10. The display device according to claim 8, wherein, The display panel includes: A second emission region; and A non-emission region surrounding the second emission region, Wherein, the second emission region is stacked with the third portion, and the fourth portion is stacked with the non-emission region.

11. The display device according to claim 10, wherein, The third portion is configured to convert a first light generated in the second emission region into a third light.

12. The display device according to claim 7, wherein, The light-transmitting layer includes: A fifth portion extending in the first direction; and A sixth portion extending from one side of the fifth portion in the first direction, Wherein, in a third direction perpendicular to the plane defined by the first direction and the second direction, the fifth portion has a thickness greater than the thickness of the sixth portion.

13. The display device according to claim 12, wherein, The display panel includes: A third emission region; and A non-emission region surrounding the third emission region, Among them, the third emission region overlaps with the fifth part, and the sixth part overlaps with the non-emission region.

14. The display device according to claim 1, wherein, The first quantum dot layer further includes a first sub-part, which is disposed between the first part and the second part, has a width smaller than that of the first part in the second direction, and has the same thickness as that of the first part in a third direction perpendicular to the plane defined by the first direction and the second direction.

15. The display device according to claim 14, wherein, In the second direction, the first sub-part has the same width as that of the second part and extends from the first part.

16. The display device according to claim 14, wherein, The first sub-part has a width gradually decreasing from the first part to the second part in the second direction.

17. The display device according to claim 14, wherein the display device further comprises: a first barrier layer, in which a first opening is defined, and the first part and the first sub-part are disposed in the first opening; and a second barrier layer, disposed on the first barrier layer, and in which a second opening is defined, and the first part, the second part and the first sub-part are disposed in the second opening.

18. The display device according to claim 1, wherein the display device further comprises a second quantum dot layer, which has a rectangular shape, faces the first part in the first direction, and faces the second part in the second direction.

19. A display device, comprising: a display panel, including a first emission region and a non-emission region surrounding the first emission region; a color filter, overlapping with the first emission region; a black matrix, overlapping with the non-emission region; and a first quantum dot layer, disposed on the first emission region, wherein the first quantum dot layer includes: a first part; and a second part, extending from one side of the first part in a first direction, wherein the first part has a thickness greater than that of the second part, wherein the first part overlaps with the color filter, and the second part overlaps with the black matrix.

20. The display device according to claim 19, wherein the display device further comprises: a first barrier layer, in which a first opening is defined, and the first part is disposed in the first opening; and a second barrier layer, disposed below the first barrier layer, and in which a second opening is defined, and the first part and the second part are disposed in the second opening.

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