Display device

Abstract

A display device is provided. The display device includes: a first substrate including a plurality of pixels; a second substrate opposite to the first substrate; and an optical path changing layer disposed between the first and second substrates and including a first pattern portion and a second pattern portion, wherein the first pattern portion has a first refractive index, the second pattern portion has a second refractive index smaller than the first refractive index, and the first pattern portion includes a blue colorant.

Description

Technical Field

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

[0002] With the development of multimedia, display devices are becoming more and more important. In response to this, various types of display devices, such as liquid crystal display (LCD) devices and organic light emitting diode display (OLED) devices, have been developed.

[0003] Among display devices, OLED devices include an organic light-emitting element as a self-emitting element. The organic light-emitting element may include two opposing electrodes and an organic emission layer between them. Electrons and holes provided from the two electrodes are recombined in the emission layer to generate excitons, and the generated excitons are converted from an excited state to a ground state and can emit light.

[0004] Since such an OLED device does not require a separate light source, it can be configured to have low power consumption and a thin and light structure, and can have high-quality characteristics such as a wide viewing angle, high brightness and contrast, and a fast response time, and therefore, the OLED device is gaining attention as a next-generation display device. Summary of the invention

[0005] Technical issues

[0006] Aspects of the present invention relate to a display device having improved color reproducibility (color gamut) by reducing external light reflectance while preventing color mixing between pixels.

[0007] Aspects of the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood from the following description by those skilled in the art.

[0008] Technical Solution

[0009] An aspect of the present invention provides a display device, comprising: a first substrate comprising a plurality of pixels; a second substrate facing the first substrate; and an optical path changing layer disposed between the first substrate and the second substrate and comprising a first pattern portion and a second pattern portion, wherein the first pattern portion has a first refractive index, the second pattern portion has a second refractive index less than the first refractive index, and the first pattern portion includes a blue colorant.

[0010] The first pattern portion may absorb green wavelength light and red wavelength light, and may transmit blue wavelength light.

[0011] The first pattern portion may be disposed on each of the plurality of pixels, and the second pattern portion may be disposed at a boundary of each of the plurality of pixels and may contact the first pattern portion.

[0012] The first pattern portion may include a first surface contacting the first substrate, a second surface contacting the second substrate, and third and fourth surfaces connecting the first and second surfaces, and an area of ​​the second surface may be greater than an area of ​​the first surface.

[0013] The first pattern part may include at least one of acrylic, cardo-based resin, and fluorine-containing polyurethane acrylate (F-PUA).

[0014] The second pattern portion may be an air gap.

[0015] The refractive index of the first pattern portion may be 1.4 or greater.

[0016] The thickness of the optical path changing layer may be 5 μm or less.

[0017] The first substrate may further include an organic light emitting element disposed in each of the plurality of pixels, and the organic light emitting element may output blue light.

[0018] The first substrate may further include an encapsulation layer covering the organic light emitting element, the second substrate may include a wavelength conversion pattern and a light-transmitting pattern and a capping layer covering the wavelength conversion pattern and the light-transmitting pattern, and the optical path changing layer may be disposed between the capping layer and the encapsulation layer.

[0019] Another aspect of the present invention provides a display device, comprising: a first substrate component, on which a plurality of pixels are defined; an organic light-emitting element, arranged on the first substrate component and in each of the plurality of pixels; an encapsulation layer, arranged on the organic light-emitting element; a second substrate component, facing the first substrate component; a wavelength conversion pattern and a light-transmitting pattern, arranged between the second substrate component and the encapsulation layer; a capping layer, covering the wavelength conversion pattern and the light-transmitting pattern; and an optical path changing layer, contacting each of the encapsulation layer and the capping layer, wherein the optical path changing layer comprises a first pattern portion having a first refractive index and a second pattern portion having a second refractive index less than the first refractive index, and the first pattern portion comprises a blue colorant.

[0020] The first pattern portion may absorb green wavelength light and red wavelength light, and may transmit blue wavelength light.

[0021] Each of the plurality of pixels may include an emission region and a non-emission region, the first pattern portion may be disposed to correspond to the emission region, and the second pattern portion may be disposed to correspond to the non-emission region.

[0022] The first pattern portion may include a plurality of high refraction portions and a plurality of low refraction portions respectively disposed between the plurality of high refraction portions.

[0023] The display device may further include: a first light blocking member, which is arranged between the second substrate component and the wavelength conversion pattern and the light-transmitting pattern, and is arranged to correspond to the boundary of each of the plurality of pixels, wherein the first light blocking member may include a first light blocking portion arranged on the second substrate component and a second light blocking portion arranged on the first light blocking portion, and the first light blocking portion may include a blue colorant.

[0024] The display device may further include a second light blocking member disposed between the wavelength conversion pattern and the light transmitting pattern, wherein the second light blocking member may overlap the first light blocking member in a thickness direction.

[0025] The display device may further include a third light blocking member disposed on the encapsulation layer, wherein the third light blocking member may overlap the second light blocking member in a thickness direction.

[0026] Another aspect of the present invention provides a display device, comprising: a first substrate, in which a display area including a plurality of pixels and a non-display area surrounding the display area are defined in the first substrate, and the plurality of pixels each include an emission area and a non-emission area; a second substrate facing the first substrate; and an optical path changing layer arranged between the first substrate and the second substrate, wherein the optical path changing layer includes a high refraction pattern portion having a refractive index of 1.4 or greater and an air gap surrounding the high refraction pattern portion, and the high refraction pattern portion includes a blue colorant, absorbs green wavelength light and red wavelength light, and transmits blue wavelength light.

[0027] The high-refractive pattern portion may be disposed on the emission region, and the air gap may be disposed on the non-emission region and the non-display region.

[0028] The high-refractive pattern portion may be provided to correspond to a portion of the non-emission area and the emission area, and the air gap may be provided to correspond to a portion of the non-emission area and a portion of the non-display area.

[0029] The high refraction pattern portion may include a plurality of high refraction pattern portions disposed in an island shape on the emission region, and an air gap may be provided to surround each of the plurality of high refraction pattern portions.

[0030] The high refraction pattern portion may include a plurality of high refraction pattern portions having a stripe shape and disposed to be spaced apart on the emission area, and the air gap may be disposed to surround each of the plurality of high refraction pattern portions.

[0031] The emission area may include first to third emission areas, the optical path change layer may be disposed on the first to third emission areas, and the high refraction pattern portion and the air gap may have different shapes in at least one of the first to third emission areas.

[0032] Specific details of other embodiments are included in the detailed description and drawings.

[0033] Beneficial Effects

[0034] The display device according to the embodiment can improve color reproducibility (color gamut) by preventing color mixing between adjacent pixels.

[0035] The display device according to the embodiment may improve image quality by reducing reflectivity of external light.

[0036] The effects according to the present invention are not limited to the above-described contents, and more various effects are included in this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a perspective view of a display device according to an embodiment.

[0038] Figure 2 It is along Figure 1 A schematic cross-sectional view of the display device taken along line II-II' in FIG.

[0039] Figure 3 is a schematic plan view of a display device according to an embodiment.

[0040] Figure 4 is a schematic plan view of a display device according to another embodiment.

[0041] Figure 5 It is along Figure 3 A cross-sectional view of the display device according to the embodiment taken along line VV′ in FIG.

[0042] Figure 6 yes Figure 5 An enlarged cross-sectional view of the organic layer.

[0043] Figure 7 It is shown Figure 6 A sectional view of a modified example of the structure shown in FIG.

[0044] Figure 8 It is shown Figure 6 sectional view of another modified example of the structure shown in .

[0045] Fig. 9 Is used to describe Figure 5 A partial enlarged view of the optical path in area A in FIG.

[0046] Fig.10 It is along Figure 3 FIG. 2 is a cross-sectional view of a display device according to an embodiment taken along line XX′.

[0047] Fig.11 is a view for describing the path of emitted light of the organic light emitting element in the embodiment.

[0048] Fig.12 is a view for describing the path of reflected light caused by external light in the embodiment.

[0049] Fig.13 is a cross-sectional view of a display device according to another embodiment.

[0050] Fig.14 is a view for describing the path of emitted light of an organic light emitting element in another embodiment.

[0051] Fig.15 is a cross-sectional view of a display device according to another embodiment.

[0052] Fig.16 is a cross-sectional view of a display device according to another embodiment.

[0053] Fig.17 is a schematic plan view of a display device according to another embodiment.

[0054] Fig.18 It is along Fig.17 A cross-sectional view taken along line XVIII-XVIII'.

[0055] Fig.19 is a schematic cross-sectional view of a display device according to another embodiment.

[0056] Fig. 20 and Fig.21 is a schematic plan view of a display device according to another embodiment.

[0057] Fig. 22 is a schematic plan view of a display device according to another embodiment.

[0058] Fig.23 and Fig.24 is a schematic plan view of a display device according to another embodiment.

[0059] Figure 25 to Figure 28 is a schematic plan view of a display device according to another embodiment. DETAILED DESCRIPTION

[0060] The advantages and features of the present invention and the methods for achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in different forms, and these embodiments are only provided to complete the disclosure of the present invention and to fully inform the ordinary technicians in the field to which the present invention belongs, that is, the present invention is only limited by the scope of the claims.

[0061] When an element or layer is referred to as being "on" another element or layer, this includes not only being directly on the other element or layer, but also another layer or element interposed therebetween. Throughout the specification, the same reference numerals refer to the same elements. The shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for describing the embodiments are exemplary, and therefore the present invention is not limited to the details shown.

[0062] Hereinafter, certain embodiments will be described in detail with reference to the accompanying drawings.

[0063] Figure 1 is a perspective view of a display device according to an embodiment, Figure 2 It is along Figure 1 A schematic cross-sectional view of the display device taken along line II-II' in FIG. Figure 3 is a schematic plan view of a display device according to an embodiment, and Figure 4 is a schematic plan view of a display device according to another embodiment.

[0064] Reference Figure 1 The display device 1 can be applied to various electronic devices, for example, small and medium-sized electronic devices such as tablet personal computers, smart phones, car navigation units, cameras, central information displays (CIDs) provided to cars, watch-type electronic devices, personal digital assistants (PDAs), portable multimedia players (PMPs), and game terminals, as well as medium and large electronic devices such as televisions, external billboards, monitors, personal computers, and notebook computers. These are given as examples only, and of course, the display device 1 can be applied to other electronic devices without departing from the concept of the present invention.

[0065] In some embodiments, the display device 1 may have a rectangular shape in a plane. The display device 1 may include two short sides extending in one direction and two long sides extending in another direction intersecting the one direction. The corner portion where the long side and the short side of the display device 1 intersect may be at a right angle in a plane, but the present invention is not limited thereto, and the corner portion may have a circular curved shape. The planar shape of the display device 1 is not limited to the shape shown, and may be applied in a square, circular, elliptical, or other shapes.

[0066] The display device 1 may include a display area DA that displays an image, and a non-display area NDA that is disposed outside the display area DA and does not display an image. The display area DA may be disposed in a central portion of the display device 1, but the present invention is not limited thereto, and the display area DA may be disposed in an edge area of ​​the display device 1.

[0067] Reference Figure 2The display device 1 according to the embodiment includes a first substrate 10, a second substrate 30 facing the first substrate 10, an optical path changing layer 70 interposed between the first substrate 10 and the second substrate 30, and a sealing member 50 for coupling the first substrate 10 and the second substrate 30 to each other at edges of the first substrate 10 and the second substrate 30.

[0068] The first substrate 10 may include elements and circuits for displaying images, for example, pixel circuits such as switching elements, a pixel defining film defining an emission region and a non-emission region in the display area DA, and an organic light emitting element. The first substrate 10 may be a display substrate.

[0069] The second substrate 30 is located above the first substrate 10 and faces the first substrate 10. The second substrate 30 may be a color conversion substrate including a color conversion pattern for converting the color of incident light, but the present invention is not limited thereto.

[0070] In the non-display area NDA, the sealing member 50 may be located between the first substrate 10 and the second substrate 30. The sealing member 50 may be disposed along the edges of the first substrate 10 and the second substrate 30 in the non-display area NDA to surround the display area DA on a plane. The first substrate 10 and the second substrate 30 may be coupled to each other through the sealing member 50. The sealing member 50 may be made of an organic material such as an epoxy-based resin, but the present invention is not limited thereto.

[0071] The optical path changing layer 70 may be located in a space between the first substrate 10 and the second substrate 30 surrounded by the sealing member 50 .

[0072] The optical path changing layer 70 may include a first pattern portion 70a and a second pattern portion 70b. The first pattern portion 70a and the second pattern portion 70b may be alternately arranged in the first direction d1 and the second direction d2. The first pattern portion 70a and the second pattern portion 70b may have different refractive indices. The second pattern portion 70b may be arranged to surround the first pattern portion 70a on a plane, but the present invention is not limited thereto.

[0073] For example, the first pattern portion 70a may be a high refractive pattern having a higher refractive index than the second pattern portion 70b, and the second pattern portion 70b may be a low refractive pattern having a lower refractive index than the first pattern portion 70a. Although the present invention is not limited thereto, the first pattern portion 70a may be made of acrylic, carboxylic resin, and fluorinated polyurethane acrylate (F-PUA). In addition, the first pattern portion 70a may include a blue colorant. The second pattern portion 70b may be an air gap, or may be a gas layer including an inert gas such as nitrogen or argon or a mixture of various types of gases. The optical path changing layer 70 will be described in more detail later.

[0074] Reference Figure 3 , the display area DA of the display device 1 according to the embodiment may include a plurality of pixels PX1, PX2 and PX3. The plurality of pixels PX1, PX2 and PX3 may include a first pixel PX1 emitting light of a first color (e.g., red light having a peak wavelength in the range of about 610nm to about 650nm), a second pixel PX2 emitting light of a second color (e.g., green light having a peak wavelength in the range of about 510nm to about 550nm), and a third pixel PX3 emitting light of a third color (e.g., blue light having a peak wavelength in the range of about 430nm to about 470nm). The first pixel PX1, the second pixel PX2 and the third pixel PX3 may be alternately arranged in a matrix direction. The plurality of pixels PX1, PX2 and PX3 may be arranged in a stripe type, but the present invention is not limited thereto, and the plurality of pixels PX1, PX2 and PX3 may be arranged in various ways such as a honeycomb (PenTile) type.

[0075] A plurality of pixels PX1, PX2, and PX3 may include emission areas LA1, LA2, and LA3 and a non-emission area LB. The emission areas LA1, LA2, and LA3 are defined as areas where light is emitted through the organic layer, and the non-emission area LB is defined as an area where emission is not performed directly through the organic layer. The non-emission area LB may be disposed to surround the emission areas LA1, LA2, and LA3. The emission areas LA1, LA2, and LA3 and the non-emission area LB may be classified by a pixel defining film described later.

[0076] The wavelength of light emitted from each of the plurality of pixels PX1, PX2, and PX3 can be adjusted not only by the light emitted from each of the emission areas LA1, LA2, and LA3, but also by a wavelength conversion pattern or a color filter disposed to overlap therewith. For example, the first emission area LA1 of the first pixel PX1, the second emission area LA2 of the second pixel PX2, and the third emission area LA3 of the third pixel PX3 all emit light of the same wavelength (e.g., blue light), and the emission colors of the corresponding pixels can be changed by the wavelength conversion pattern and / or the color filter disposed in the corresponding pixels.

[0077] The non-display area NDA does not include the emission areas LA1, LA2 and LA3, or the non-display area NDA has a structure substantially the same as the emission areas LA1, LA2 and LA3 but may include a dummy emission area controlled not to emit light, or the non-display area NDA includes the emission areas LA1, LA2 and LA3 but light emission in the display direction may be blocked by a light blocking member.

[0078] The plurality of first pattern portions 70a of the optical path changing layer 70 may be disposed above the emission areas LA1, LA2, and LA3 of the display device 1. For example, each of the plurality of first pattern portions 70a may have the same area as that of a single emission area LA1, LA2, and LA3, and may be disposed to correspond to each of the emission areas LA1, LA2, and LA3. The second pattern portion 70b may be disposed in a form surrounding the plurality of first pattern portions 70a. That is, the first pattern portion 70a is disposed to overlap with each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be disposed to overlap with the non-emission area LB in a form surrounding the first pattern portion 70a. However, the present invention is not limited thereto, and as Figure 4 As shown in the figure, the first pattern portion 70a may have an area smaller than that of a single emission area LA1, LA2, and LA3, and may be set to correspond to each of the emission areas LA1, LA2, and LA3. That is, the first pattern portion 70a may be set to overlap with a portion of each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be set to overlap with a portion of each of the emission areas LA1, LA2, and LA3 and the non-emission area LB in the form of surrounding the first pattern portion 70a. In addition, although not shown in the drawings, the first pattern portion 70a may have an area larger than that of each of the emission areas LA1, LA2, and LA3, and in this case, the first pattern portion 70a may be set to overlap with the emission areas LA1, LA2, and LA3 and a portion of the non-emission area LB.

[0079] at this time, Figure 3 and Figure 4 It is shown that the first pattern portion 70a is provided corresponding to each of the emission areas LA1, LA2, and LA3, but this is an example, and the first pattern portion 70a may be provided only in some of the emission areas LA1, LA2, and LA3.

[0080] Figure 5 It is along Figure 3 A cross-sectional view of the display device according to the embodiment taken along line VV′ in FIG. Figure 6 yes Figure 5 An enlarged cross-sectional view of the organic layer. Figure 7 It is shown Figure 6 A sectional view of a modified example of the structure shown in FIG. Figure 8 It is shown Figure 6 sectional view of another modified example of the structure shown in .

[0081] Reference Figure 5 The display device 1 may include a first substrate 10 , a second substrate 30 facing the first substrate 10 , and an optical path changing layer 70 located between the first substrate 10 and the second substrate 30 .

[0082] The first substrate 10 may include a first base member 110 , a plurality of switching elements T1 , T2 , and T3 , an insulating film 130 , a pixel defining film 150 , a plurality of organic light emitting elements ED1 , ED2 , and ED3 , and an encapsulation layer 170 .

[0083] The first substrate member 110 may be made of a light-transmitting material. The first substrate member 110 may be a glass substrate or a plastic substrate.

[0084] At least one switching element T1, T2, or T3 may be disposed in each of the plurality of pixels PX1, PX2, and PX3 on the first substrate part 110. Although not shown in the drawings, a plurality of signal lines (e.g., gate lines, data lines, power lines, etc.) for transmitting signals to each of the switching elements T1, T2, and T3 may be further disposed on the first substrate part 110.

[0085] The insulating film 130 may be disposed on the plurality of switching elements T1, T2, and T3. The insulating film 130 may be made of an organic film. For example, the insulating film 130 may include an acrylic resin, an epoxy resin, an imide resin, an ester resin, or the like.

[0086] Pixel electrodes AE1, AE2, and AE3 may be respectively disposed in the plurality of pixels PX1, PX2, and PX3 on the insulating film 130. The plurality of pixel electrodes AE1, AE2, and AE3 may be respectively located in the emission regions LA1, LA2, and LA3, and at least some of the pixel electrodes AE1, AE2, and AE3 may extend to the non-emission region LB. The plurality of pixel electrodes AE1, AE2, and AE3 may be respectively connected to the switching elements T1, T2, and T3 through through holes passing through the insulating film 130.

[0087] In an embodiment, each of the plurality of pixel electrodes AE1, AE2 and AE3 may be an anode of the organic light emitting element ED1, ED2 or ED3. Each of the plurality of pixel electrodes AE1, AE2 and AE3 may include a material having a high work function and easy hole injection, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or indium oxide (In 2 O 3 ) and the like. When the display device 1 is a top emission display device, each of the plurality of pixel electrodes AE1, AE2, and AE3 may further include a reflective metal layer. The reflective metal layer may include, for example, silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), lead (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or a mixture thereof. In some embodiments, each of the plurality of pixel electrodes AE1, AE2, and AE3 may have a double-layer structure of ITO / Ag, Ag / ITO, ITO / Mg, or ITO / MgF, or a multi-layer structure such as ITO / Ag / ITO.

[0088] The pixel defining film 150 may be located on the pixel electrodes AE1, AE2, and AE3. The pixel defining film 150 may be arranged along the boundary of each of the plurality of pixels PX1, PX2, and PX3. The pixel defining film 150 may be formed in a grid shape and include an opening that at least partially exposes each of the plurality of pixel electrodes AE1, AE2, and AE3. As described above, the emission areas LA1, LA2, and LA3 may be distinguished from the non-emission area LB by the pixel defining film 150. That is, the areas of the pixel electrodes AE1, AE2, and AE3 that are not covered by the pixel defining film 150 and exposed may become the emission areas LA1, LA2, and LA3, and the areas covered by the pixel defining film 150 may become the non-emission areas LB.

[0089] In some embodiments, the pixel defining film 150 may include an organic insulating material such as an acrylic resin (polyacrylic resin), an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene resin, a polyphenylene sulfide resin, or a benzocyclobutene (BCB).

[0090] The organic layers OL1, OL2, and OL3 may be disposed on the pixel electrodes AE1, AE2, and AE3 exposed through the openings of the pixel defining film 150. Figures 6 to 8 The organic layers OL1 , OL2 , and OL3 are described in detail.

[0091] exist Figures 6 to 8 , only the stack structure of the first organic layer OL1 among the organic layers OL1 , OL2 , and OL3 is shown, but the other organic layers OL2 and OL3 may have the same stack structure.

[0092] Reference Figure 6 In an embodiment, the first organic layer OL1 may include a first hole transport layer HTL1 on the first pixel electrode AE1, a first emission layer EL11 on the first hole transport layer HTL1, and a first electron transport layer ETL1 on the first emission layer EL11. In an embodiment, the first organic layer OL1 may include only one emission layer (e.g., the first emission layer EL11) as an emission layer, and the first emission layer EL11 may be a blue emission layer. However, the stacking structure of the first organic layer OL1 is not limited to Figure 6 The structure can also be Figure 7 and Figure 8 has been modified as shown in .

[0093] Reference Figure 7 , the first organic layer OL1a may further include a first charge generation layer CGL11 on the first emission layer EL11 and a second emission layer EL12 on the first charge generation layer CGL11, and a first electron transport layer ETL1 may be on the second emission layer EL12.

[0094] The first charge generation layer CGL11 may be used to inject charges into each adjacent emission layer. The first charge generation layer CGL11 may be used to control the charge balance between the first emission layer EL11 and the second emission layer EL12. In some embodiments, the first charge generation layer CGL11 may include an n-type charge generation layer and a p-type charge generation layer. The p-type charge generation layer may be disposed on the n-type charge generation layer.

[0095] The second emission layer EL12 is not limited thereto, but may emit blue light like the first emission layer EL11. The second emission layer EL12 may emit blue light having the same peak wavelength as the first emission layer EL11 or a peak wavelength different from that of the first emission layer EL11. In another embodiment, the first emission layer EL11 and the second emission layer EL12 may emit light of different colors. That is, the first emission layer EL11 may emit blue light, and the second emission layer EL12 may emit green light.

[0096] The first organic layer OL1a having the above structure includes two emission layers so that Figure 6 Compared with the structure of , the luminous efficiency and life span can be improved.

[0097] Figure 8 It is described that the first organic layer OL1 b may include the three emission layers EL11 , EL12 , and EL13 and the two charge generation layers CGL11 and CGL12 interposed therebetween.

[0098] like Figure 8 As shown in , the first organic layer OL1b may further include a first charge generation layer CGL11 located on the first emission layer EL11, a second emission layer EL12 located on the first charge generation layer CGL11, a second charge generation layer CGL12 located on the second emission layer EL12, and a third emission layer EL13 located on the second charge generation layer CGL12. The first electron transport layer ETL1 may be located on the third emission layer EL13.

[0099] The third emission layer EL13 may emit blue light like the first emission layer EL11 and the second emission layer EL12. In an embodiment, the first emission layer EL11, the second emission layer EL12, and the third emission layer EL13 may each emit blue light, but the peak values ​​of the wavelengths may all be the same, or some of the peak values ​​may be different. In another embodiment, the emission colors of the first emission layer EL11, the second emission layer EL12, and the third emission layer EL13 may be different. For example, each emission layer may emit blue light or green light, or each emission layer may emit red light, green light, and blue light to emit white light as a whole.

[0100] Refer again Figure 5, each of the organic layers OL1, OL2, and OL3 may be separated for each of the pixels PX1, PX2, and PX3. For example, the organic layers OL1, OL2, and OL3 are respectively disposed on the pixel electrodes AE1, AE2, and AE3 exposed by the opening of the pixel defining film 150, thereby being separated by the pixel defining film 150. However, the present invention is not limited thereto, and in another embodiment, the first organic layer OL1, the second organic layer OL2, and the third organic layer OL3 may be connected to each other, and in this case, since the separation process of the organic layers OL1, OL2, and OL3 does not need to be performed for each of the pixels PX1, PX2, and PX3, the process efficiency may be improved. In yet another embodiment, for each of the pixels PX1, PX2, and PX3, some of the stacked layers of the organic layers OL1, OL2, and OL3 are separated, and the rest may be formed integrally regardless of the pixels PX1, PX2, and PX3. For example, for each pixel PX1 , PX2 , PX3 , the emission layer of each of the organic layers OL1 , OL2 , and OL3 is separated, but the hole transport layer and / or the electron transport layer may be formed as a common layer.

[0101] The common electrode CE is disposed on the organic layers OL1, OL2, and OL3. The common electrode CE may be disposed on the entire surface regardless of the pixels PX1, PX2, and PX3.

[0102] When the pixel electrodes AE1, AE2 and AE3 are the anodes of the organic light-emitting elements ED1, ED2 and ED3, the common electrode CE becomes the cathode of the organic light-emitting elements ED1, ED2 and ED3, and the common electrode CE may include a material having a low work function that is easy for electron injection, for example, Li, Ca, LiF, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF, Ba or a compound or mixture thereof (for example, a mixture of Ag and Mg, etc.), or a double-layer structure of LiF / Ca or LiF / Al.

[0103] When the display device 1 is a top-emitting display device, the common electrode CE may have a transmissive or semi-transmissive characteristic. When a material having a low work function is formed to be as thin as tens to hundreds of angstroms, the common electrode CE may have a transmissive or semi-transmissive characteristic. When a metal film having a low work function is used, in order to reduce resistance while ensuring transmittance, the common electrode CE may further include a transparent conductive material layer stacked on the metal film, such as tungsten oxide (W x O y ), titanium oxide (TiO 2 ), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO) or magnesium oxide (MgO).

[0104] The first pixel electrode AE1, the first organic layer OL1 and the common electrode CE may form a first organic light-emitting element ED1, the second pixel electrode AE2, the second organic layer OL2 and the common electrode CE may form a second organic light-emitting element ED2, and the third pixel electrode AE3, the third organic layer OL3 and the common electrode CE may form a third organic light-emitting element ED3.

[0105] The encapsulation layer 170 is disposed on the common electrode CE. The encapsulation layer 170 may be disposed on the organic light emitting elements ED1, ED2, and ED3 to prevent impurities or moisture from penetrating from the outside, and may be provided to seal the first substrate 10.

[0106] The encapsulation layer 170 may be disposed on the entire surface regardless of the pixels PX1, PX2, and PX3. In an embodiment, the encapsulation layer 170 may directly cover the common electrode CE. In another embodiment, a capping layer covering the common electrode CE may be further disposed between the encapsulation layer 170 and the common electrode CE, and in this case, the encapsulation layer 170 may directly cover the capping layer.

[0107] The encapsulation layer 170 may include a first encapsulation inorganic film 171 , an encapsulation organic film 173 , and a second encapsulation inorganic film 175 sequentially stacked on the common electrode CE.

[0108] Each of the first encapsulation inorganic film 171 and the second encapsulation inorganic film 175 may be made of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride (SiON), lithium fluoride, or the like.

[0109] The encapsulating organic film 173 may be made of acrylic-based resin, methacrylic-based resin, polyisoprene, vinyl resin, epoxy-based resin, urea-based resin, cellulose-based resin, perylene-based resin, or the like.

[0110] However, the structure of the encapsulation layer 170 is not limited to the above-mentioned example, and additionally, the stack structure of the encapsulation layer 170 may be variously changed.

[0111] The second substrate 30 may include a second base part 310 , first to third light blocking members BM1 , BM2 , and BM3 , a color filter layer 330 , wavelength conversion patterns 341 and 343 , a light-transmitting pattern 345 , and a capping layer PS.

[0112] In the second substrate 30, light-emitting areas PA1, PA2 and PA3 and a non-light-emitting area PB may be defined. The light-emitting areas PA1, PA2 and PA3 are areas in which light is emitted to the outside, and the non-light-emitting area PB is defined as an area in which light is not emitted to the outside and is blocked. The non-light-emitting area PB may be arranged to surround the light-emitting areas PA1, PA2 and PA3. The light-emitting areas PA1, PA2 and PA3 may include the above-mentioned emission areas LA1, LA2 and LA3, and may include at least a portion of the non-light-emitting area LB. The non-light-emitting area PB may be arranged in the non-light-emitting area LB. That is, the areas of the light-emitting areas PA1, PA2 and PA3 may be larger than the areas of the emission areas LA1, LA2 and LA3, and the area of ​​the non-light-emitting area PB may be smaller than the area of ​​the non-light-emitting area LB.

[0113] The second substrate member 310 may be made of a light-transmitting material, and may be a glass substrate or a plastic substrate.

[0114] The first light blocking member BM1 may be disposed on the second substrate part 310. The first light blocking member BM1 may be disposed along the boundary of each of the pixels PX1, PX2, and PX3. For example, the first light blocking member BM1 may be disposed in a substantially grid shape on a plane, and may prevent light from penetrating between adjacent pixels PX1, PX2, and PX3 and causing color mixing.

[0115] The first light blocking member BM1 may include a first light blocking portion BM1 a and a second light blocking portion BM1 b , and may be disposed between a boundary portion of each of the color filter patterns 331 , 333 , and 335 and the second substrate part 310 .

[0116] The first light blocking portion BM1a may be disposed on one surface of the second substrate part 310. The first light blocking portion BM1a may transmit light of the third color, and may absorb and block light of the first color and light of the second color. That is, the first light blocking portion BM1a may be an absorption filter that transmits blue light but absorbs and blocks red light and green light. For example, the first light blocking portion BM1a may be formed of a blue color filter and may include a blue colorant.

[0117] The second light blocking portion BM1b may overlap with the first light blocking portion BM1a. The second light blocking portion BM1b may block light transmission by absorbing or reflecting light incident on the second light blocking portion BM1b. The width of the second light blocking portion BM1b may be narrower than the width of the first light blocking portion BM1a. However, the present invention is not limited thereto. In other embodiments, the width of the first light blocking portion BM1a may be narrower than the width of the second light blocking portion BM1b, or the width of the first light blocking portion BM1a may be the same as the width of the second light blocking portion BM1b.

[0118] The second light blocking member BM1b may be formed of an organic material or a metal material including chromium. For example, the second light blocking member BM1b may be formed of a carbon black matrix or an organic black matrix, but the present invention is not limited thereto. In addition, the thickness of the first light blocking member BM1 may be 2 μm, but the present invention is not limited thereto.

[0119] In an embodiment, the areas of the light-emitting regions PA1, PA2, and PA3 may be different from each other, and when the areas of the light-emitting regions PA1, PA2, and PA3 are different from each other, the light reflected by the external light may not be visually recognized as neutral black. For example, when the area of ​​the third light-emitting region PA3, which is a region emitting blue light, is narrow, the blue light reflected by the external light may also be less. Further, even if the areas of the light-emitting regions PA1, PA2, and PA3 are the same, the wavelength conversion pattern is not provided in the third light-emitting region PA3 among the light-emitting regions PA1, PA2, and PA3, so that the light reflected by the external light may have less blue light than red light and green light. That is, when the blue light is insufficient in the reflected light, the red light and the green light other than the blue light are visually recognized relatively more, and thus the reflected light may be a yellowish black color as a whole.

[0120] In an embodiment, the external light incident on the first light blocking member BM1 may transmit only blue light in the first light blocking portion BM1a, and the light of the remaining colors may be absorbed, and the blue external light transmitted through the first light blocking portion BM1a may be incident on the second light blocking portion BM1b. The blue external light incident on the second light blocking portion BM1b may be absorbed by the second light blocking portion BM1b, but some of the blue external light may be reflected without being absorbed by the second light blocking portion BM1b. That is, the blue light reflected to the outside by the external light may increase, and therefore, the color of the reflected light may be adjusted.

[0121] In addition, since light in the blue wavelength is not easily recognized by the human eye visually, when external light is incident on the blue first light blocking portion BM1a and reflected to the outside, the visibility of the reflected light is smaller than when the external light is directly incident on the black second light blocking portion BM1b and reflected to the outside. Therefore, in an embodiment of the present invention, since the first light blocking member BM1 further includes the first light blocking portion BM1a, the visibility of the reflected light can be reduced, thereby improving the image quality.

[0122] Likewise, the configuration of the first light blocking member BM1 is an example, and in another embodiment, the first light blocking member BM1 may be formed as a single layer structure consisting of either the first light blocking portion BM1a or the second light blocking portion BM1b. In yet another embodiment, the first light blocking member BM1 may be omitted.

[0123] The color filter layer 330 is disposed on the second substrate part 310 and the first light blocking member BM1. The color filter layer 330 may include a plurality of color filter patterns 331, 333, and 335. For example, the color filter layer 330 may include a first color filter pattern 331, a second color filter pattern 333, and a third color filter pattern 335. The first color filter pattern 331 may overlap the first light emitting region PA1, the second color filter pattern 333 may overlap the second light emitting region PA2, and the third color filter pattern 335 may overlap the third light emitting region PA3.

[0124] The first to third color filter patterns 331, 333, and 335 can selectively transmit light of a specific color, but absorb light of other colors to block transmission. For example, the first color filter pattern 331 can transmit light of the first color, but absorb and block light of the second color and light of the third color. As described above, the light of the first color can be red light, the light of the second color can be green light, and the light of the third color can be blue light. That is, the first color filter pattern 331 can be a red color filter pattern that transmits red light but absorbs and blocks green light and blue light, and can include a red colorant.

[0125] The second color filter pattern 333 may transmit the second color light, but may absorb and block the first color light and the third color light. That is, the second color filter pattern 333 may be a green color filter pattern that transmits green light but absorbs and blocks red light and blue light, and may include a green colorant.

[0126] The third color filter pattern 335 may transmit light of a third color, but may absorb and block light of the first color and light of the second color. That is, the third color filter pattern 335 may be a blue color filter pattern that transmits blue light but absorbs and blocks red light and green light, and may include a blue colorant.

[0127] A boundary portion of each of the color filter patterns 331 , 333 , and 335 may be located in the non-light emitting region PB.

[0128] The first capping layer PS1 may be located on the color filter patterns 331, 333, and 335. The first capping layer PS1 may prevent impurities such as moisture or air from penetrating from the outside to damage or contaminate the color filter patterns 331, 333, and 335. In addition, the first capping layer PS1 may prevent the colorant included in each of the color filter patterns 331, 333, and 335 from diffusing to other components. In some embodiments, the first capping layer PS1 may be made of an inorganic material. For example, the first capping layer PS1 may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, or silicon oxynitride, etc.

[0129] The wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345 may be disposed on the first capping layer PS1 .

[0130] The first wavelength conversion pattern 341 may be disposed in the first light emitting region PA1, and may not be disposed in the second light emitting region PA2 and the third light emitting region PA3. The area of ​​the first wavelength conversion pattern 341 may be formed to be larger than the area of ​​the first light emitting region PA1, but this is an example and the present invention is not limited thereto. In another embodiment, the area of ​​the first wavelength conversion pattern 341 and the area of ​​the first light emitting region PA1 may be the same, and in yet another embodiment, the area of ​​the first light emitting region PA1 may be formed to be larger than the area of ​​the first wavelength conversion pattern 341.

[0131] The first wavelength conversion pattern 341 may convert a peak wavelength of incident light into another specific peak wavelength to emit light. For example, the first wavelength conversion pattern 341 may convert blue light into red light in the range of about 610 nm to about 650 nm to emit light.

[0132] The first wavelength conversion pattern 341 may include a first base resin 341 a and a first wavelength conversion material 341 b dispersed in the first base resin 341 a , and may further include a first scatterer 341 c dispersed in the first base resin 341 a .

[0133] The first base resin 341a is not particularly limited as long as it is a material having high light transmittance and significant dispersion characteristics for the first wavelength conversion material 341b and the first scatterer 341c. For example, the first base resin 341a may include an organic material such as an epoxy-based resin, an acrylic-based resin, a cardo-based resin, or an imide-based resin.

[0134] The first wavelength conversion material 341b can convert the peak wavelength of the incident light into another specific peak wavelength. Examples of the first wavelength conversion material 341b may include quantum dots, quantum rods, or phosphors. Quantum dots may be granular materials that emit light of a specific wavelength when electrons transition from a conduction band to a valence band.

[0135] Quantum dots can be semiconductor nanocrystal materials. Quantum dots have specific band gaps according to their composition and size, and therefore can emit light with a unique wavelength after absorbing light. Examples of semiconductor nanocrystals of quantum dots can include IV group nanocrystals, II-VI group compound nanocrystals, III-V group compound nanocrystals, IV-VI group compound nanocrystals, or combinations thereof.

[0136] For example, the Group IV nanocrystal may be exemplified by a binary compound including silicon (Si), germanium (Ge), such as silicon carbide (SiC) or silicon-germanium (SiGe), but the present invention is not limited thereto.

[0137] In addition, II-VI compound nanocrystals can be made of binary compounds such as CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, or mixtures thereof, such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdH The present invention is exemplified by ternary compounds such as HgZnTe, CdHgSe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS or mixtures thereof, or quaternary compounds such as HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe or mixtures thereof, but the present invention is not limited thereto.

[0138] In addition, the III-V compound nanocrystals can be exemplified by binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb or mixtures thereof, ternary compounds such as GaNPs, GaNAs, GaNSb, GaPAs, GaPSb, AlNPs, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNPs or mixtures thereof, or quaternary compounds such as GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb or mixtures thereof, but the present invention is not limited thereto.

[0139] Group IV-VI compound nanocrystals can be exemplified by binary compounds such as SnS, SnSe, SnTe, PbS, PbSe, PbTe or mixtures thereof, ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe or mixtures thereof, or quaternary compounds such as SnPbSSe, SnPbSeTe, SnPbSTe or mixtures thereof, but the present invention is not limited thereto.

[0140] The quantum dot may have a core-shell structure including a core containing the above-mentioned nanocrystal and a shell surrounding the core. The shell of the quantum dot may be used as a protective layer for maintaining semiconductor properties by preventing chemical modification of the core and / or a charging layer for imparting electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. Examples of the shell of the quantum dot may include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0141] For example, metal oxides or non-metal oxides can be made of SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 or binary compounds such as NiO, or MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 or CoMn 2 O 4 The invention is exemplified by ternary compounds such as , but the invention is not limited thereto.

[0142] In addition, the semiconductor compound can be exemplified by CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP or AlSb, etc., but the present invention is not limited thereto.

[0143] The light emitted by the first wavelength conversion material 341b may have a spectral half-width (FWHM) emission wavelength of about 45nm or less, about 40nm or less, or about 30nm or less, and thus, the color purity and color reproducibility (color gamut) of the color displayed by the display device may be improved. In addition, the light emitted by the first wavelength conversion material 341b may be emitted in all directions regardless of the incident direction of the incident light. Thus, the side visibility of the display device may be improved.

[0144] Some of the emission light L provided from the first organic light emitting element ED1 may pass through the first wavelength conversion pattern 341 to be emitted without being converted into red light by the first wavelength conversion material 341b. Components that are not converted by the first wavelength conversion pattern 341 and incident on the first color filter pattern 331 may be blocked by the first color filter pattern 331. On the other hand, red light converted by the first wavelength conversion pattern 341 among the emission light L may pass through the first color filter pattern 331 to be emitted to the outside. Therefore, the first emission light L1 emitted from the first light emitting region PA1 to the outside may be red light.

[0145] The first scatterer 341c may have a refractive index different from that of the first base resin 341a, and may form an optical interface with the first base resin 341a. For example, the first scatterer 341c may be light scattering particles. The first scatterer 341c is not particularly limited as long as it is a material capable of scattering at least a portion of the transmitted light, and may be, for example, metal oxide particles or organic particles. Examples of metal oxides may include titanium oxide (TiO 2 )、ZrO 2 ), aluminum oxide (Al 2 O 3 ), indium oxide (In 2 O 3 ), zinc oxide (ZnO) and tin oxide (SnO 2 ) and the like, and examples of the material of the organic particles may include acrylic-based resins and urea-based resins, etc. The first scatterer 341c may scatter light in random directions without substantially converting the wavelength of light passing through the first wavelength conversion pattern 341, regardless of the incident direction of the incident light. Therefore, the path length of light passing through the first wavelength conversion pattern 341 may be increased, and the color conversion efficiency by the first wavelength conversion material 341b may be increased.

[0146] In some embodiments, the thickness of the first wavelength conversion pattern 341 may be in the range of 3 μm to 15 μm. The content of the first wavelength conversion material 341 b included in the first wavelength conversion pattern 341 may be 10% to 60%. In addition, the content of the first scatterer 341 c included in the first wavelength conversion pattern 341 may be 2% to 15%, but the present invention is not limited thereto.

[0147] The second wavelength conversion pattern 343 may be disposed in the second light emitting region PA2, and may not be disposed in the first light emitting region PA1 and the third light emitting region PA3. The area of ​​the second wavelength conversion pattern 343 may be formed to be larger than the area of ​​the second light emitting region PA2, but this is an example and the present invention is not limited thereto. In another embodiment, the area of ​​the second wavelength conversion pattern 343 and the area of ​​the second light emitting region PA2 may be the same, and in yet another embodiment, the area of ​​the second light emitting region PA2 may be formed to be larger than the area of ​​the second wavelength conversion pattern 343.

[0148] The second wavelength conversion pattern 343 may convert the peak wavelength of the incident light into another specific peak wavelength to emit light. For example, the second wavelength conversion pattern 343 may convert blue light into green light in the range of about 510nm to about 550nm to emit light.

[0149] The second wavelength conversion pattern 343 may include a second base resin 343 a and a second wavelength conversion material 343 b dispersed in the second base resin 343 a , and may further include a second scatterer 343 c dispersed in the second base resin 343 a .

[0150] The second base resin 343a is not particularly limited as long as it is a material having high light transmittance and significant dispersion characteristics for the second wavelength conversion material 343b and the second scatterer 343c. For example, the second base resin 343a may include an organic material such as an epoxy-based resin, an acrylic-based resin, a cardo-based resin, or an imide-based resin.

[0151] As described above, the second wavelength conversion material 343b can convert the peak wavelength of the incident light into another specific peak wavelength. The second wavelength conversion material 343b can convert blue light having a peak wavelength in the range of 430nm to 470nm into green light having a peak wavelength in the range of 510nm to 550nm.

[0152] Examples of the second wavelength conversion material 343b may include quantum dots, quantum rods, or phosphors. A more specific description of the second wavelength conversion material 343b is substantially the same as or similar to that described above in the description of the first wavelength conversion material 341b, and thus will be omitted.

[0153] Both the first wavelength conversion material 341b and the second wavelength conversion material 343b may be formed of quantum dots. In this case, the diameter of the quantum dots forming the first wavelength conversion material 341b may be larger than the diameter of the quantum dots forming the second wavelength conversion material 343b. For example, the size of the quantum dots of the first wavelength conversion material 341b may be approximately to Further, the size of the quantum dots of the second wavelength conversion material 343b may be approximately to

[0154] Light transmitted through the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343 may be in a non-polarized state in which there is no polarization. Non-polarized light refers to light that is not composed of polarization components only in a specific direction, that is, light that is not polarized only in a special direction, in other words, non-polarized light refers to light composed of random polarization components. Natural light may be included as an example of non-polarized light.

[0155] The second scatterer 343c may have a refractive index different from that of the second base resin 343a, and may form an optical interface with the second base resin 343a. For example, the second scatterer 343c may be light scattering particles. The specific description of the second scatterer 343c other than the above is substantially the same or similar to the description of the first scatterer 341c, and thus the specific description will be omitted.

[0156] In some embodiments, the thickness of the second wavelength conversion pattern 343 may be 3 μm to 15 μm. The content of the second wavelength conversion material 343b included in the second wavelength conversion pattern 343 may be 10% to 60%. In addition, the content of the second scatterer 343c included in the second wavelength conversion pattern 343 may be 2% to 15%, but the present invention is not limited thereto.

[0157] The emission light L emitted from the second organic light emitting element ED2 may be provided to the second wavelength conversion pattern 343, and the second wavelength conversion material 343b may convert the emission light L provided from the second organic light emitting element ED2 into green light having a single peak wavelength in the range of about 510 nm to about 550 nm to emit light.

[0158] Some of the emission light L provided from the second organic light emitting element ED2 may pass through the second wavelength conversion pattern 343 to be emitted without being converted into green light by the second wavelength conversion material 343b, and components that are not converted by the second wavelength conversion pattern 343 and incident on the second color filter pattern 333 may be blocked by the second color filter pattern 333. On the other hand, green light converted by the second wavelength conversion pattern 343 among the emission light L may pass through the second color filter pattern 333 to be emitted to the outside. Therefore, the second emission light L2 emitted to the outside from the second light emitting area PA2 may be green light.

[0159] The light-transmitting pattern 345 may be located in the third light-emitting region PA3 and may not be located in the first light-emitting region PA1 and the second light-emitting region PA2. The light-transmitting pattern 345 may transmit incident light. The area of ​​the light-transmitting pattern 345 may be larger than the area of ​​the third light-emitting region PA3, but this is an example and the present invention is not limited thereto. In another embodiment, the area of ​​the light-transmitting pattern 345 and the area of ​​the third light-emitting region PA3 may be the same, and in yet another embodiment, the area of ​​the third light-emitting region PA3 may be larger than the area of ​​the light-transmitting pattern 345.

[0160] The light-transmitting pattern 345 may include a third base resin 345 a and a third scatterer 345 b dispersed in the third base resin 345 a .

[0161] The third base resin 345 a may be made of an organic material having high light transmittance, and may be made of the same material as the first base resin 341 a , or may include at least one of the materials exemplified as constituent materials of the first base resin 341 a .

[0162] The third scatterer 345b may have a refractive index different from that of the third base resin 345a, and may form an optical interface with the third base resin 345a. For example, the third scatterer 345b may be light scattering particles. The third scatterer 345b is not particularly limited as long as it is a material capable of scattering at least a portion of the transmitted light, and may be, for example, metal oxide particles or organic particles. Examples of metal oxides may include titanium oxide (TiO 2 )、ZrO 2 ), aluminum oxide (Al 2 O 3 ), indium oxide (In 2 O 3 ), zinc oxide (ZnO) and tin oxide (SnO 2) and the like, and examples of the material of the organic particles may include acrylic resins and urea-based resins, etc. The third scatterer 345b may scatter light in random directions without substantially converting the wavelength of light passing through the light-transmitting pattern 345, regardless of the incident direction of the incident light. Therefore, the side visibility of the light passing through the light-transmitting pattern 345 may be improved.

[0163] The emission light L provided from the third organic light emitting element ED3 may pass through the light-transmitting pattern 345 and the third color filter pattern 335 to be emitted to the outside. That is, the third emission light L3 emitted from the third emission area PA3 may have the same wavelength as the emission light L which is blue light emitted from the third organic light emitting element ED3.

[0164] Although not shown in the drawings, in some embodiments, a low refractive index layer may be further disposed between the first wavelength conversion pattern 341, the second wavelength conversion pattern 343, the light-transmitting pattern 345 and the first capping layer PS1. The low refractive index layer may be disposed on the first light-emitting area PA1, the second light-emitting area PA2, the third light-emitting area PA3 and the non-light-emitting area PB. The low refractive index layer may have a lower refractive index than the first wavelength conversion pattern 341, the second wavelength conversion pattern 343 and the light-transmitting pattern 345. For example, the difference in refractive index between the first wavelength conversion pattern 341, the second wavelength conversion pattern 343 and the light-transmitting pattern 345 and the low refractive index layer may be 0.3 or greater. The low refractive index layer may include a base resin and particles dispersed in the base resin. The particles included in the low refractive index layer may be zinc oxide (ZnO) particles, titanium oxide (TiO 2 ) particles, hollow silica particles with empty interiors, silica particles that are not empty interiors, nanosilicate particles, and porogen particles.

[0165] The low refractive index layer may re-reflect some of the light emitted from the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343 toward the second substrate member 310 to the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343. That is, the low refractive index layer may improve light utilization efficiency and improve light efficiency of the display device by recycling at least a portion of the light emitted in a direction toward the second substrate member 310.

[0166] The second capping layer PS2 may be located on the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343. The second capping layer PS2 may cover the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343, and in some embodiments, the second capping layer PS2 may be further located on the light-transmitting pattern 345 and may further cover the light-transmitting pattern 345. The second capping layer PS2 may seal the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343 together with the first capping layer PS1, and thus, impurities such as moisture or air may be prevented from penetrating from the outside to damage or contaminate the first wavelength conversion pattern 341 and the second wavelength conversion pattern 343. In some embodiments, the second capping layer PS2 may be made of an inorganic material. The second capping layer PS2 may be made of the same material as the first capping layer PS1, or may include at least one of the materials mentioned in the description of the first capping layer PS1.

[0167] The second light blocking member BM2 may be disposed on the second capping layer PS2. For example, the second light blocking member BM2 may be disposed between the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345. The second light blocking member BM2 may be disposed between the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345, and may cover a portion of the upper surface of the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345, and the thickness of the second light blocking member BM2 protruding from the upper surface of the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345 may be 1 μm. However, this is an example, and the second light blocking member BM2 may be disposed only on the side surfaces of the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345.

[0168] The second light blocking member BM2 may overlap with the first light blocking member BM1 in the thickness direction d3. However, the present invention is not limited thereto. For example, the second light blocking member BM2 and the first light blocking member BM1 may be arranged in different regions in the thickness direction d3, and in this case, the second light blocking member BM2 and the first light blocking member BM1 may not overlap in the thickness direction d3, or may partially overlap. In addition, the width of the second light blocking member BM2 may be the same as the width of the first light blocking portion BM1a of the first light blocking member BM1. However, the present invention is not limited thereto, and the width of the second light blocking member BM2 may be the same as the width of the second light blocking portion BM1b of the first light blocking member BM1, or the width of the second light blocking member BM2 may be formed to be narrower than the width of the second light blocking portion BM1b of the first light blocking member BM1.

[0169] The second light blocking member BM2 may be a carbon black matrix or an organic black matrix, but the present invention is not limited thereto. The second light blocking member BM2 may block light emitted to the side surfaces of the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345 to effectively prevent color mixing between the light emitting areas PA1, PA2, and PA3.

[0170] The optical path changing layer 70 may be disposed in a space between the second substrate 30 and the first substrate 10. The optical path changing layer 70 may be made of a material capable of transmitting light. The optical path changing layer 70 may serve as a buffer zone between the first substrate 10 and the second substrate 30.

[0171] The optical path changing layer 70 may include a first pattern portion 70a and a second pattern portion 70b so that a moving path of the emission light L emitted from the first substrate 10 in the light emitting areas PA1, PA2, and PA3 to the second substrate 30 may also be changed. In addition, the first pattern portion 70a may include a blue colorant and may transmit blue light, but may absorb and block red light and green light.

[0172] The first pattern portion 70a and the second pattern portion 70b of the optical path changing layer 70 may be alternately arranged in a cross section. Typically, the first pattern portion 70a may be arranged to overlap each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be arranged to overlap the non-emission area LB. However, the present invention is not limited thereto, and in another embodiment, the first pattern portion 70a may overlap the emission areas LA1, LA2, and LA3 and a portion of the non-emission area LB, and the second pattern portion 70b may overlap a portion of the non-emission area LB, and in yet another embodiment, the first pattern portion 70a may overlap a portion of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may overlap the non-emission area LB and a portion of the emission areas LA1, LA2, and LA3, and in yet another embodiment, the first pattern portion 70a may be arranged to overlap each of the light emitting areas PA1, PA2, and PA3, and the second pattern portion 70b may be arranged to overlap the non-light emitting area PB.

[0173] The first pattern portion 70a and the second pattern portion 70b may be formed of materials having different refractive indexes. For example, the first pattern portion 70a may have a first refractive index, and the second pattern portion 70b may have a second refractive index smaller than the first refractive index.

[0174] The first pattern portion 70a may be formed of a high refractive pattern including a blue colorant. For example, the first pattern portion 70a may be a blue high refractive pattern made of acrylic, cardo, or fluorine-containing polyurethane acrylate (F-PUA), etc., but the present invention is not limited thereto.

[0175] The second pattern portion 70b may be formed of a low-refractive pattern. For example, the second pattern portion 70b may be an air gap, or may be a low-refractive pattern including an inert gas such as nitrogen or argon, or a mixture of various types of gases.

[0176] The first pattern portion 70a may be made of a material having a refractive index greater than 1.4 to effectively generate total reflection at a boundary surface between the first pattern portion 70a and the second pattern portion 70b when the refractive index difference with the second pattern portion 70b is 0.3 or more, but the present invention is not limited thereto.

[0177] When the second pattern portion 70b includes an air gap or a gas mixture, the refractive index of the second pattern portion 70b can be substantially close to 1.0. That is, the difference in refractive index between the first pattern portion 70a and the second pattern portion 70b can be 0.5 or more, and total reflection can effectively occur at the boundary surface between the first pattern portion 70a and the second pattern portion 70b. In another embodiment, the second pattern portion 70b can include a low-refractive material instead of an air gap. The low-refractive material can be made of a material having a refractive index higher than the refractive index of the air gap and lower than the refractive index of the first pattern portion 70a.

[0178] As described above, the optical path changing layer 70 can prevent the emission light L emitted from each of the emission areas LA1, LA2 and LA3 from penetrating into the adjacent pixels PX1, PX2 and PX3 by the difference in refractive index between the first pattern portion 70a and the second pattern portion 70b, and at the same time, the optical path changing layer 70 can prevent color mixing from occurring in the display device 1 by allowing the emission light L to be emitted to the light emitting areas PA1, PA2 and PA3 of the corresponding pixels PX1, PX2 and PX3, and can improve the emission efficiency.

[0179] The thickness H of the optical path changing layer 70 may be formed within 5 μm, and preferably, the thickness H of the optical path changing layer 70 may be formed within 3 μm. Therefore, the optical path changing layer 70 may be formed as a thin film compared to a conventional filling layer, and thus may minimize the emission light L emitted from the emission areas LA1, LA2, and LA3 from advancing to the adjacent pixels PX1, PX2, and PX3.

[0180] Furthermore, since the optical path changing layer 70 includes a blue colorant, reflected light caused by external light may be emitted as light in a blue wavelength band that is not easily visible to human eyes, thereby effectively reducing visibility of the reflected light.

[0181] The third light blocking member BM3 may be disposed on the encapsulation layer 170 of the first substrate 10. The third light blocking member BM3 may be disposed to overlap with the second light blocking member BM2 and the second pattern portion 70b in the thickness direction d3. For example, the second light blocking member BM2 and the third light blocking member BM3 may be disposed to face each other in the region in which the second pattern portion 70b is disposed. In addition, in an embodiment, the second light blocking member BM2 and the third light blocking member BM3 may be disposed to be spaced apart from each other in the thickness direction d3, and in another embodiment, the second light blocking member BM2 and the third light blocking member BM3 may contact each other.

[0182] The width of the third light blocking member BM3 may be the same as the width of the second light blocking member BM2, and may be formed to be narrower than the width of the second pattern portion 70b. However, the present invention is not limited thereto. In another embodiment, the width of the third light blocking member BM3 may be less than the width of the second light blocking member BM2 and the width of the second pattern portion 70b, and in yet another embodiment, the width of the third light blocking member BM3 may be greater than the width of the second light blocking member BM2, and may be the same as the width of the second pattern portion 70b. In addition, in another embodiment, the third light blocking member BM3 may be omitted.

[0183] Fig. 9 Is used to describe Figure 5 A partial enlarged view of the optical path in area A.

[0184] Reference Figure 5 and Fig. 9 , each of the organic light emitting elements ED1, ED2, and ED3 emits blue light, and the emission light L may propagate toward the second substrate 30. As described above, the optical path changing layer 70 may be disposed between the first substrate 10 and the second substrate 30. In addition, the optical path changing layer 70 may include a first pattern portion 70a and a second pattern portion 70b, the first pattern portion 70a may overlap with each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may overlap with the non-emission area LB. That is, the emission light L emitted from each of the organic light emitting elements ED1, ED2, and ED3 may be incident on the first pattern portion 70a of the optical path changing layer 70.

[0185] Light incident on the first pattern portion 70a may generally propagate toward the second substrate 30 in each of the light emitting regions PA1, PA2, and PA3, but some of the light La, Lb, and Lc may propagate toward the second pattern portion 70b in the first pattern portion 70a.

[0186] The first pattern portion 70a and the second pattern portion 70b may have different refractive indices and may form a boundary surface 70i. When the refractive indices of the media are different from each other based on the boundary surface 70i, an optical interface is formed, and light incident on the boundary surface 70i may be refracted or reflected. Therefore, light La, Lb, and Lc propagating from the first pattern portion 70a having a high refractive index to the second pattern portion 70b having a low refractive index may be refracted and transmitted to the second pattern portion 70b, or may be reflected to the first pattern portion 70a.

[0187] The propagation direction of the light may be determined according to the incident angles θa, θb, and θc of the light incident on the boundary surface 70i between the first pattern portion 70a and the second pattern portion 70b. For example, when the incident angle θc of the first incident light Lc is less than the critical angle, at the boundary surface 70i, a portion is reflected as the first reflected light Lc', and a portion may be transmitted to the second pattern portion 70b as the first transmitted light Lc". When the incident angle θb of the second incident light Lb is equal to the critical angle, the second incident light Lb is not reflected or refracted, and may propagate along the boundary surface 70i as the critical light Lb'. When the incident angle θa of the third incident light La is greater than the critical angle, the third incident light La is not refracted to be transmitted to the second pattern portion 70b, and may be totally reflected at the boundary surface 70i to propagate to the first pattern portion 70a as the third reflected light La'. Here, the more light is totally reflected, the more light may be converged to the first pattern portion 70a.

[0188] Here, the critical angle may be determined by the refractive index of the first pattern portion 70a and the second pattern portion 70b. The magnitude of the critical angle decreases as the difference between the refractive index of the first pattern portion 70a and the refractive index of the second pattern portion 70b increases. That is, the greater the difference in refractive index, the smaller the critical angle and the more light that can be fully emitted.

[0189] In addition, since the optical path changing layer 70 minimizes light dispersion to the second pattern portion 70b through the structure or optical characteristics as described above, color mixing between adjacent pixels PX1, PX2, and PX3 can be prevented. Further, since the optical path changing layer 70 can converge light to the first pattern portion 70a corresponding to each of the emission areas LA1, LA2, and LA3, a more improved light emitting effect can be provided.

[0190] Fig.10 It is along Figure 3 FIG. 2 is a cross-sectional view of a display device according to an embodiment taken along line XX′.

[0191] Reference Fig.10 The display device 1 may include a first substrate 10 , a second substrate 30 disposed to face the first substrate 10 , and an optical path changing layer 70 disposed between the first substrate 10 and the second substrate 30 .

[0192] A fourth color filter pattern 337 and a third wavelength conversion pattern 347 disposed to correspond to the fourth light emitting region PA4 may be included in the second substrate 30. The fourth color filter pattern 337 and the third wavelength conversion pattern 347 may be different from the first color filter pattern 331 and the first wavelength conversion pattern 341, respectively. That is, in the first light emitting region PA1, the first wavelength conversion pattern 341 may convert incident light into light of the first color, and the first color filter pattern 331 may transmit the converted light of the first color. Therefore, the first light emitting region PA1 may be a region in which light of the first color is emitted to the outside. However, the fourth light emitting region PA4 may be a region in which light of the second color or light of the third color, rather than light of the first color, is emitted to the outside. Hereinafter, the fourth light emitting region PA4 is described as a region in which light of the second color is emitted to the outside, but the present invention is not limited thereto, and may also be a region in which light of the third color is emitted to the outside.

[0193] The third wavelength conversion pattern 347 of the fourth light emitting area PA4 may convert incident light into light of a second color. That is, the third wavelength conversion pattern 347 may be substantially the same as the second wavelength conversion pattern 343. The third wavelength conversion pattern 347 may include a fourth base resin 347a, a third wavelength conversion material 347b dispersed in the fourth base resin 347a, and a fourth scatterer 347c dispersed in the fourth base resin 347a. The fourth color filter pattern 337 may transmit the light of the second color converted by the third wavelength conversion pattern 347, but may absorb and block other light.

[0194] The fourth emission light L4 of the fourth light emitting area PA4 may be light having a different color from the first emission light L1 of the first light emitting area PA1. That is, as described above, the optical path changing layer 70 may be patterned into the first pattern portion 70a and the second pattern portion 70b to prevent color mixing between the first light emitting area PA1 and the fourth light emitting area PA4.

[0195] The optical path changing layer 70 may include a first pattern portion 70a and a second pattern portion 70b, wherein the first pattern portion 70a may overlap with each of the emission areas LA1 and LA4, and the second pattern portion 70b may overlap with the non-emission area LB. However, the present invention is not limited thereto, and in another embodiment, the first pattern portion 70a may overlap with each of the light emitting areas PA1 and PA4, and the second pattern portion 70b may overlap with the non-light emitting area PB.

[0196] Refer to Figure 3 Floor plan and Figure 5 A cross-sectional view of Fig.10 , the first pattern portion 70a may be positioned individually for each of the emission areas LA1, LA2, LA3, and LA4. That is, the first pattern portions 70a overlapping each of the emission areas LA1, LA2, LA3, and LA4 may be spaced apart from each other. In other words, the first pattern portion 70a may be formed in an independent island shape for each of the emission areas LA1, LA2, LA3, and LA4 on a plane.

[0197] The emission light L emitted from the organic light emitting elements ED1 and ED4 is incident on the optical path changing layer 70, and as shown in FIG. Fig. 9 As described above, since some light can be totally reflected at the optical interface between the first pattern portion 70a and the second pattern portion 70b without being transmitted to the second pattern portion 70b and can be converged to the first pattern portion 70a, the dispersion of light is minimized, thereby preventing color mixing between adjacent pixels PX1 and PX4 and improving the luminous effect.

[0198] Fig.11 d3 is a diagram for describing the path of light emitted from an organic light emitting element in an embodiment. In describing the path of light, the vertical direction refers to the same direction as the third direction (ie, thickness direction) d3, and the adjacent pixel direction refers to the first direction d1 or the direction opposite to the first direction d1.

[0199] Reference Fig.11 The first organic light emitting element ED1 provided in the first pixel PX1 may output a first emission light L11 incident on the optical path changing layer 70 in a vertical direction, and a second emission light L12 incident on the optical path changing layer 70 at a certain angle in the direction of adjacent pixels PX1, PX2, and PX3.

[0200] The first emission light L11 is vertically incident on the first pattern portion 70 a and passes through the first wavelength conversion pattern 341 and the first color filter pattern 331 , and may be output to the outside corresponding to the first pixel PX1 as the first emission light L1 (red light).

[0201] The second emission light L12 is incident on the second pattern portion 70b at an angle less than the critical angle, and is refracted in a vertical direction through an optical interface formed by the difference in refractive index between the encapsulation layer 170 and the second pattern portion 70b and is incident on the second pattern portion 70b. In addition, the second emission light L12 is refracted in a more vertical direction through an optical interface formed by the difference in refractive index between the second pattern portion 70b and the first wavelength conversion pattern 341 to be incident on the first wavelength conversion pattern 341, and can be output to the outside corresponding to the first pixel PX1 as the first emission light L1 (red light) while passing through the first color filter pattern 331.

[0202] Therefore, the path of the second emission light L12 is changed above the first pixel PX1 by the second pattern portion 70b of the low refraction pattern serving as the optical path changing layer 70, so that the second emission light L12 propagating in the direction of adjacent pixels PX1, PX2, and PX3 in the first organic light-emitting element ED1 can be output as the first emission light L1.

[0203] The second organic light emitting element ED2 disposed in the second pixel PX2 may output first emission light L21 incident on the optical path change layer 70 in a vertical direction and second emission light L22 incident on the optical path change layer 70 at a certain angle in the direction of adjacent pixels PX1, PX2, and PX3.

[0204] The first emission light L21 may be incident on the first pattern portion 70 a in a vertical direction and may pass through the second wavelength conversion pattern 343 and the second color filter pattern 333 to be output to the outside corresponding to the second pixel PX2 as the second emission light L2 (green light).

[0205] The second emission light L22 is incident on the first pattern portion 70a at an angle less than the critical angle in the direction of the adjacent pixels PX1, PX2, and PX3, and is refracted in the direction of the adjacent pixels PX1, PX2, and PX3 through the optical interface formed by the difference in refractive index between the encapsulation layer 170 and the first pattern portion 70a, and is refracted in the vertical direction through the optical interface formed by the difference in refractive index between the first pattern portion 70a and the second pattern portion 70b to be incident on the second pattern portion 70b at an angle less than the critical angle. In addition, the second emission light L22 may be refracted in a more vertical direction through the optical interface formed by the difference in refractive index between the second pattern portion 70b and the second wavelength conversion pattern 343 to be incident on the second wavelength conversion pattern 343, and may be output to the outside corresponding to the second pixel PX2 as the second emission light L2 (green light) while passing through the second color filter pattern 333.

[0206] Therefore, the path of the second emission light L22 is changed above the second pixel PX2 due to the difference in refractive index between the first pattern portion 70a and the second pattern portion 70b of the optical path changing layer 70, so that the second emission light L22 propagating in the direction of adjacent pixels PX1, PX2 and PX3 in the second organic light-emitting element ED2 can be output as the second emission light L2.

[0207] The third organic light emitting element ED3 disposed in the third pixel PX3 may output first emission light L31 incident on the optical path changing layer 70 in a vertical direction and second emission light L32 incident on the optical path changing layer 70 at an angle in the direction of adjacent pixels PX1, PX2, and PX3.

[0208] The first emission light L31 is incident on the first pattern portion 70a in a direction perpendicular to the first pattern portion 70a and passes through the light-transmitting pattern 345 and the third color filter pattern 335 , and may be output to the outside corresponding to the third pixel PX3 as third emission light L3 (blue light).

[0209] The second emission light L32 is incident on the first pattern portion 70a at an angle less than the critical angle in the direction of the adjacent pixels PX1, PX2 and PX3, and is refracted in the direction of the adjacent pixels PX1, PX2 and PX3 through the optical interface formed by the difference in refractive index between the encapsulation layer 170 and the first pattern portion 70a, and is incident on the optical interface between the first pattern portion 70a and the second pattern portion 70b at an angle greater than the critical angle to be totally reflected at the optical interface. In addition, the totally reflected light passes through the light-transmitting pattern 345 and the third color filter pattern 335, and can be output to the outside corresponding to the third pixel PX3 as the third emission light L3 (blue light).

[0210] Therefore, the path of the second emission light L32 is changed above the third pixel PX3 by being totally reflected due to the difference in refractive index between the first pattern portion 70a and the second pattern portion 70b of the optical path changing layer 70, so that the second emission light L32 propagating in the direction of adjacent pixels PX1, PX2 and PX3 in the third organic light-emitting element ED3 can be output as the third emission light L3.

[0211] Fig.12 1 is a view for describing a path of reflected light caused by external light in an embodiment. For convenience of description, the first to fifth external lights W1, W2, W3, W4, and W5 incident on the first pixel PX1, the second pixel PX2, and the third pixel PX3 are described as examples, and the first to fifth external lights W1, W2, W3, W4, and W5 may be white light.

[0212] Reference Fig.12 The first external light W1 and the second external light W2 may be incident on the first pixel PX1. The second external light W2 passes through the first color filter pattern 331 and the first wavelength conversion pattern 341 and is converted into red light R, and the converted red light R is absorbed in the first pattern portion 70a of the optical path change layer 70.

[0213] The first external light W1 passes through the first color filter pattern 331 and the first wavelength conversion pattern 341 and is converted into red light R. A portion of the converted red light R is absorbed in the first pattern portion 70a of the optical path changing layer 70, and a portion of the converted red light R is reflected to the first organic light emitting element ED1 (e.g., the first pixel electrode AE1 of the first organic light emitting element ED1) and becomes reflected light because the path of the light is changed to the outside, but is absorbed by the first pattern portion 70a that absorbs the red light R and the green light G. Therefore, the first pattern portion 70a of the optical path changing layer 70 includes a blue colorant and is disposed to overlap the first emission area LA1, so that the first external light W1 and the second external light W2 can be converted into red light R by the first color filter pattern 331 and the first wavelength conversion pattern 341 to effectively block the reflected light emitted to the outside.

[0214] The third external light W3 and the fourth external light W4 may be incident on the second pixel PX2 . The fourth external light W4 passes through the second color filter pattern 333 and the second wavelength conversion pattern 343 and is converted into green light G, and the converted green light G is absorbed in the first pattern portion 70 a of the optical path change layer 70 .

[0215] The third external light W3 passes through the second color filter pattern 333 and the second wavelength conversion pattern 343 and is converted into green light G. A portion of the converted green light G is absorbed in the first pattern portion 70a of the optical path changing layer 70, and a portion of the converted green light G is reflected to the second organic light emitting element ED2 (e.g., the second pixel electrode AE2 of the second organic light emitting element ED2) and becomes reflected light because the path of the light is changed outward, but is absorbed by the first pattern portion 70a that absorbs the red light R and the green light G. Therefore, the first pattern portion 70a of the optical path changing layer 70 includes a blue colorant and is disposed to overlap the second emission area LA2, so that the third external light W3 and the fourth external light W4 can be converted into green light G by the second color filter pattern 333 and the second wavelength conversion pattern 343 to effectively block the reflected light emitted to the outside.

[0216] The fifth external light W5 may be incident on the third pixel PX3. The fifth external light W5 passes through the third color filter pattern 335 and is converted into blue light B, the converted blue light B is reflected to the third organic light emitting element ED3 (e.g., the third pixel electrode AE3 of the third organic light emitting element ED3) and becomes reflected light because the path of the light changes to the outside, a portion of the reflected light is absorbed by the third light blocking member BM3, and a portion of the reflected light is emitted to the outside. Since light in the blue wavelength band is not easily visible to the human eye, the visibility of the reflected light is smaller than when the external light is directly incident on the black light blocking member and is reflected to the outside.

[0217] Therefore, in the optical path changing layer of the embodiment, the first pattern portion includes the blue colorant, and thus the reflected light can be significantly reduced as a whole.

[0218] Fig.13 is a cross-sectional view of a display device according to another embodiment, and Fig.14 is a view for describing the path of emitted light of an organic light emitting element in another embodiment.

[0219] Fig.13 and Figure 5 The difference of the embodiment is that the first pattern portion of the optical path changing layer is formed in an inverted trapezoidal shape. Figure 5 The description of the embodiments is repeated, and the description will mainly focus on the differences.

[0220] The optical path changing layer 70_1 may be disposed in a space between the second substrate 30 and the first substrate 10. The optical path changing layer 70_1 may include a first pattern portion 70a_1 and a second pattern portion 70b_1. The first pattern portion 70a_1 may be provided in plurality and may be provided to be spaced apart from each other. The second pattern portion 70b_1 may be provided in a space in which a plurality of first pattern portions 70a_1 are separated, and the second pattern portion 70b_1 may be an air gap, or may be a low refractive pattern including an inert gas such as nitrogen or argon or a mixture of various types of gases, and the shape of the second pattern portion 70b_1 may be changed according to the shape of the first pattern portion 70a_1.

[0221] The first pattern portion 70a_1 may be formed in an inverted trapezoidal shape in cross section. Specifically, the first pattern portion 70a_1 may include a first surface S1 in contact with the first substrate 10, a second surface S2 in contact with the second substrate 30, and a third surface S3 and a fourth surface S4 as side surfaces connecting the first surface S1 and the second surface S2, and the area of ​​the second surface S2 is formed to be larger than the area of ​​the first surface S1. In addition, the angle θ1 formed between the first surface S1 and the third surface S3 or the fourth surface S4 may be an obtuse angle.

[0222] The first pattern portion 70a_1 and the second pattern portion 70b_1 of the optical path changing layer 70_1 may be alternately arranged in a cross section. The first pattern portion 70a_1 may be arranged to overlap each of the emission areas LA1, LA2, and LA3. For example, the second surface S2 of the first pattern portion 70a_1 may be arranged to overlap each of the emission areas LA1, LA2, and LA3. However, the present invention is not limited thereto, and the first surface S1 of the first pattern portion 70a_1 may be arranged to overlap each of the emission areas LA1, LA2, and LA3. Therefore, the first pattern portion 70a_1 has an inverted trapezoidal shape, so that the optical interface between the first pattern portion 70a_1 and the second pattern portion 70b_1 may have a constant slope, and thus the path of the emission light L output from the organic light emitting elements ED1, ED2, and ED3 in the vertical direction may be more effectively changed.

[0223] Reference Fig.14 , the first pattern portion 70a_1 has an inverted trapezoidal shape, so that the optical interface between the first pattern portion 70a_1 and the second pattern portion 70b_1 is tilted outward. Since the light incident on the first pattern portion 70a_1 and propagating to the second pattern portion 70b_1 is totally reflected based on the optical interface, the path of the incident light can be changed to a more vertical direction by the outwardly tilted optical interface. The paths of the emitted light output from the organic light emitting elements ED1, ED2, and ED3 have been described above, and thus a repeated description is omitted.

[0224] Fig.15 is a cross-sectional view of a display device according to another embodiment. Fig.15 and Figure 5 The difference between the embodiments is that the structure of the second substrate is different. Figure 5 The description of the embodiments is repeated, and the description will mainly focus on the differences.

[0225] Reference Fig.15 ,and Figure 5 Unlike the second substrate 30 shown in FIG. 3 , the second substrate 30_1 may include a planarization layer OC, a third capping layer PS3 , and a second light blocking member BM2_1 .

[0226] The first light blocking member BM1 may include a first light blocking portion BM1a and a second light blocking portion BM1b. The first light blocking member BM1 may be disposed between a boundary portion of each of the color filter patterns 331, 333, and 335 and the second substrate part 310. Figure 5 The embodiments are the same as those of the present invention, and thus the detailed description is omitted.

[0227] In the second substrate 30_1 according to another embodiment, a planarization layer OC may be further disposed on the second capping layer PS2. When the thicknesses of the first wavelength conversion pattern 341, the second wavelength conversion pattern 343, and the light-transmitting pattern 345 are different from each other during the process or when there is a separated space between components, the height between the components and the separated space may be formed to be substantially uniform by the planarization layer OC.

[0228] The material of the planarization layer OC is not particularly limited as long as it has a planarization property. In an embodiment, the planarization layer OC may include an organic material. For example, the organic material may include a carboxylic acid-based resin, a polyimide-based resin, an acrylic-based resin, a siloxane-based resin, or a silsesquioxane-based resin.

[0229] The third capping layer PS3 may be further disposed on the planarization layer OC. The third capping layer PS3 may cover the planarization layer OC as a whole. The third capping layer PS3 may be made of an inorganic material. The third capping layer PS3 may be made of the same material as the first capping layer PS1, or may include at least one of the materials mentioned in the description of the first capping layer PS1.

[0230] The second light blocking member BM2_1 may be disposed on the third capping layer PS3. The second light blocking member BM2_1 may be disposed to overlap with the first light blocking member BM1, and may prevent color mixing between adjacent pixels PX1, PX2, and PX3. The first light blocking member BM1 may be disposed between the second substrate part 310 and the wavelength conversion patterns 341 and 343 and between the second substrate part 310 and the light-transmitting pattern 345, and the second light blocking member BM2_1 may be disposed between the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345 and the organic light-emitting elements ED1, ED2, and ED3. The thickness of the second light blocking member BM2_1 may be less than the thickness of each of the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345, but the present invention is not limited thereto.

[0231] The second light blocking member BM2_1 may be disposed on another surface of the third capping layer PS3 different from one surface of the third capping layer PS3 contacting the planarization layer OC.

[0232] The second light blocking member BM2_1 may absorb or reflect light of all colors to block transmission. The second light blocking member BM2_1 may be disposed in a substantially grid shape on a plane, and may prevent light from penetrating between adjacent pixels and causing color mixing.

[0233] The second light blocking member BM2_1 may be formed of one of the materials described with respect to the second light blocking portion BM1b of the first light blocking member BM1, but in some embodiments, the second light blocking member BM2_1 may be formed of the same material as the second light blocking portion BM1b.

[0234] Fig.16 is a cross-sectional view of a display device according to another embodiment. Fig.16 and Fig.15 The difference of the embodiment is that the first light blocking member is a single-layer structure made of organic material. Fig.15 The description of the embodiments is repeated, and the description will be mainly focused on the differences.

[0235] Reference Fig.16 , the second substrate 30_2 may include a first light blocking member BM1_1 and a second light blocking member BM2_1.

[0236] The first light blocking member BM1_1 may be disposed on the second base part 310. Fig.15 Unlike the embodiment of the present invention, the first light blocking member BM1_1 may be an organic black matrix including an organic material. The first light blocking member BM1_1 is located between the second substrate part 310 and the wavelength conversion patterns 341 and 343 and between the second substrate part 310 and the light-transmitting pattern 345, and is disposed along the boundary of the pixels PX1, PX2, and PX3, and thus light can be prevented from penetrating between adjacent pixels PX1, PX2, and PX3 and causing color mixing. In addition, by forming the first light blocking member BM1_1 using an organic material, there are advantages of heat resistance, light resistance, chemical resistance, and high adhesion strength to the second substrate part 310.

[0237] The second light blocking member BM2_1 may be disposed on the third capping layer PS3 and may be made of a carbon black matrix. The second light blocking member BM2_1 is located between the wavelength conversion patterns 341 and 343 and the light-transmitting pattern 345 and the organic light emitting elements ED1, ED2, and ED3, and is disposed along the boundaries of the pixels PX1, PX2, and PX3, and thus may prevent light from penetrating between adjacent pixels PX1, PX2, and PX3 and causing color mixing. In addition, the first light blocking member BM1_1 and the second light blocking member BM2_1 may be disposed to overlap each other in the thickness direction d3.

[0238] Fig.17is a schematic plan view of a display device according to another embodiment, and Fig.18 It is along Fig.17 A cross-sectional view taken along line XVIII-XVIII'. Fig.17 and Fig.18 Examples and Figure 5 The difference of the embodiment is that the first pattern portion of the optical path changing layer is composed of a plurality of high refractive portions and a plurality of low refractive portions. Figure 5 The description of the embodiments is repeated, and the description will mainly focus on the differences.

[0239] Reference Fig.17 and Fig.18 , the optical path change layer 70_2 according to another embodiment may include a first pattern portion 70 a and a second pattern portion 70 b.

[0240] The first pattern portion 70a may be disposed above the emission areas LA1, LA2, and LA3 to correspond to each of the emission areas LA1, LA2, and LA3. The second pattern portion 70b may be disposed in a form surrounding the first pattern portion 70a. That is, the first pattern portion 70a may be disposed to overlap each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be disposed to overlap the non-emission area LB in a form surrounding the first pattern portion 70a.

[0241] The first pattern portion 70a may include a plurality of high refraction portions 70a1 as a high refraction pattern including a blue colorant, and a low refraction portion 70a2 disposed between the plurality of high refraction portions 70a1. Each of the plurality of high refraction portions 70a1 may have a strip shape and may be disposed to be separated, and the low refraction portion 70a2 may be disposed in each separation space between the plurality of high refraction portions 70a1. Therefore, the first pattern portion 70a including the plurality of high refraction portions 70a1 and the plurality of low refraction portions 70a2 may be disposed to correspond to each of the emission areas LA1, LA2, and LA3 of the respective pixels PX1, PX2, and PX3, and the second pattern portion 70b may have a form surrounding the outside of the first pattern portion 70a.

[0242] The number and size of the high refraction portion 70a1 and the low refraction portion 70a2 included in the first pattern portion 70a may be variously formed according to the size of the emission area LA1, LA2, or LA3.

[0243] Each of the high refractive part 70a1 may include acrylic acid, carboxylic resin and fluorinated polyurethane acrylate (F-PUA). In addition, the high refractive part 70a1 may include a blue colorant. Each of the low refractive part 70a2 may include an air gap, or may be a gas layer including an inert gas such as nitrogen or argon or a mixture of various types of gases. The refractive index of the high refractive part 70a1 may be greater than 1.4, and the refractive index of the low refractive part 70a2 may be close to 1.0.

[0244] The upper surface of the high refractive portion 70a1 may be in contact with the second substrate 30, and the lower surface of the high refractive portion 70a1 may be in contact with the first substrate 10. The low refractive portion 70a2 and the second pattern portion 70b may have the same material and the same refractive index. For example, when distinguishing the second pattern portion 70b from the low refractive portion 70a2, the second pattern portion 70b may be disposed between the high refractive portion 70a1 closest to the second pixel PX2 among the plurality of high refractive portions 70a1 disposed in the first emission area LA1 of the first pixel PX1 and the high refractive portion 70a1 closest to the first pixel PX1 among the plurality of high refractive portions 70a1 disposed in the second emission area LA2 of the second pixel PX2, and the low refractive portion 70a2 may be disposed between the plurality of high refractive portions 70a1 disposed on each of the pixels PX1, PX2, and PX3.

[0245] The width of the high refraction part 70a1 of the first pattern part 70a and the width of the low refraction part 70a2 may be the same, but the present invention is not limited thereto. For example, the width of the high refraction part 70a1 may be greater than the width of the low refraction part 70a2, or the width of the low refraction part 70a2 may be greater than the width of the high refraction part 70a1. Therefore, when a plurality of high refraction parts 70a1 and a plurality of low refraction parts 70a2 are arranged in the first pattern part 70a, an optical interface may be formed not only between the first pattern part 70a and the second pattern part 70b, but also between the plurality of high refraction parts 70a1 and the plurality of low refraction parts 70a2 in the first pattern part 70a, and the path of the emitted light L outputted from each of the pixels PX1, PX2 and PX3 may be changed in the vertical direction by the plurality of optical interfaces, thereby more effectively preventing the color mixing between the adjacent pixels PX1, PX2 and PX3.

[0246] Fig.19 is a schematic cross-sectional view of a display device according to another embodiment. Fig.19 Examples and Fig.18 The embodiment of the present invention is different in that the shapes of the high refractive part and the low refractive part are formed differently. Fig.18The description of the embodiments is repeated, and the description will be mainly focused on the differences.

[0247] Reference Fig.19 According to another embodiment, the optical path change layer 70_3 may include a first pattern portion 70a and a second pattern portion 70b. The first pattern portion 70a may include a plurality of high refraction portions 70a1 as a high refraction pattern including a blue colorant, and a low refraction portion 70a2 disposed between the plurality of high refraction portions 70a1.

[0248] Each of the high refractive parts 70a1 can have an inverted trapezoidal shape in the cross section, and can be set to be spaced apart. Specifically, the high refractive part 70a1 may include a lower surface a1 contacting the first substrate 10, an upper surface a2 contacting the second substrate 30, and a first side surface a3 and a second side surface a4 connecting the lower surface a1 and the upper surface a2, and the area of ​​the upper surface a2 can be formed to be greater than the area of ​​the lower surface a1. In addition, the angle θ2 formed between the lower surface a1 and the first side surface a3 or the second side surface a4 can be an obtuse angle. Since the low refractive part 70a2 is arranged in the separation space between the high refractive parts 70a1, the shape of the low refractive part 70a2 depends on the shape of the high refractive part 70a1. Therefore, when the high refractive part 70a1 has an inverted trapezoidal shape, the low refractive part 70a2 arranged between the high refractive parts 70a1 can have a trapezoidal shape.

[0249] and Fig.18 Compared with the embodiment of Fig.19 In the embodiment of the present invention, the high refractive portion 70a1 has an inverted trapezoidal shape, so that the optical interface between the high refractive portion 70a1 and the low refractive portion 70a2 can have a constant slope, and the path of the emission light L output from the organic light emitting elements ED1, ED2 and ED3 can be more effectively changed in the vertical direction, and thus color mixing between adjacent pixels PX1, PX2 and PX3 can be more effectively prevented.

[0250] Hereinafter, various forms of the optical path changing layer will be described. Hereinafter, a high refractive pattern refers to a pattern including a blue colorant having a refractive index of 1.4 or more, and a low refractive pattern refers to an air gap or a pattern formed of a gas having a refractive index close to an air gap.

[0251] Fig. 20 and Fig.21 is a schematic plan view of a display device according to another embodiment.

[0252] Reference Fig. 20 and Fig.21, the optical path changing layers 70_4 and 70_5 according to other embodiments may include a first pattern portion 70a, a second pattern portion 70b, and a third pattern portion 70c. The first pattern portion 70a may be a high refraction pattern provided in an island shape in each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be a low refraction pattern provided in the non-emission area LB. The third pattern portion 70c may be a low refraction pattern provided in a grid shape around the plurality of first pattern portions 70a in each of the emission areas LA1, LA2, and LA3. Fig. 20 As shown in FIG. 1 , a plurality of first pattern portions 70a may be arranged in matching columns and rows, and as shown in FIG. Fig.21 As shown in , a plurality of first pattern portions 70a may be provided by changing the arrangement of odd and even rows. However, the present invention is not limited thereto, and a plurality of first pattern portions 70a having an island shape may be irregularly provided and may be provided in different sizes.

[0253] Therefore, the optical path change layers 70_4 and 70_5 include a plurality of first pattern portions 70a disposed in an island shape, and thus may more effectively prevent color mixing between adjacent pixels PX1, PX2, and PX3 by maximizing an optical interface formed between the first pattern portion 70a and the third pattern portion 70c.

[0254] Fig. 22 is a schematic plan view of a display device according to another embodiment.

[0255] Reference Fig. 22 , the optical path changing layer 70_6 according to another embodiment may include a first pattern portion 70a, a second pattern portion 70b, and a third pattern portion 70c. The first pattern portion 70a may be a high refraction pattern having a rectangular shape provided in each of the emission areas LA1, LA2, and LA3, and the second pattern portion 70b may be a low refraction pattern provided in the non-emission area LB. The third pattern portion 70c may be a low refraction pattern surrounding a plurality of first pattern portions 70a in each of the emission areas LA1, LA2, and LA3. A plurality of first pattern portions 70a may be provided in different numbers in odd columns and even columns. However, the present invention is not limited thereto. For example, a plurality of first pattern portions 70a having a rectangular shape may be irregularly provided, and each of the plurality of first pattern portions 70a having a rectangular shape may be provided to have different sizes.

[0256] Fig.23 and Fig.24 is a schematic plan view of a display device according to another embodiment.

[0257] Reference Fig.23 and Fig.24 , Fig.23 The optical path changing layer 70_7 and Fig.24 The optical path changing layer 70_8 may each include a first pattern portion 70a, a second pattern portion 70b, and a third pattern portion 70c. The first pattern portion 70a may include a first sub-pattern SB1 as a high refraction pattern having a rectangular shape provided in each of the emission areas LA1, LA2, and LA3 and a second sub-pattern SB2 as a high refraction pattern having a stripe shape, and the second pattern portion 70b may be a low refraction pattern provided in the non-emission area LB, and the third pattern portion 70c may be a low refraction pattern surrounding the first sub-pattern SB1 and the second sub-pattern SB2 in each of the emission areas LA1, LA2, and LA3. Among the plurality of first sub-patterns SB1 and second sub-patterns SB2, as shown in FIG. Fig.23 The second sub-pattern SB2 having a stripe shape shown in FIG. 1 may be disposed at a central portion of each of the emission areas LA1, LA2, and LA3, and as shown in FIG. Fig.24 The second sub-pattern SB2 having a strip shape shown in the figure may be disposed at the peripheral portion of each of the emission areas LA1, LA2, and LA3. However, the present invention is not limited thereto, and the first sub-pattern SB1 and the second sub-pattern SB2 may be disposed irregularly, and each of the plurality of first sub-patterns SB1 may have a different size. Each of the plurality of second sub-patterns SB2 may be disposed to have a different size.

[0258] Figure 25 to Figure 28 is a schematic plan view of a display device according to another embodiment.

[0259] Reference Figure 25 to Figure 28 The optical path changing layer C70 according to other embodiments may have a structure in which different patterns are compositely arranged. For example, the pattern in which the optical path changing layer C70 is arranged on each of the pixels PX1, PX2, and PX3 may be different.

[0260] Reference Fig.25 , the optical path changing layer C70 may include a plurality of first pattern portions 70a having a stripe shape in the first pixel PX1, one first pattern portion 70a corresponding to one emission area LA2 in the second pixel PX2, and a plurality of first pattern portions 70a having a stripe shape in the third pixel PX3. That is, Fig.25 The optical path changing layer C70 of the embodiment may have a Fig.17 The optical path changing layer 70_2 and Figure 3 The optical path changing layer 70 of the embodiment has a compositely combined structure.

[0261] Reference Fig.26 , the optical path change layer C70_1 may include a plurality of first pattern portions 70a having an island shape in the first pixel PX1, one first pattern portion 70a corresponding to one emission area LA2 in the second pixel PX2, and a plurality of first pattern portions 70a having a stripe shape in the third pixel PX3. That is, Fig.26 The optical path changing layer C70_1 of the embodiment may have a Fig. 20 The optical path changing layer 70_4 of the embodiment, Figure 3 The optical path changing layer 70 of the embodiment, and Fig.17 The optical path changing layer 70_2 of the embodiment has a compositely combined structure.

[0262] Reference Fig. 27 , the optical path change layer C70_2 may include a plurality of first pattern portions 70a having an island shape in which the arrangement of odd and even rows is different in the first pixel PX1, one first pattern portion 70a corresponding to one emission area LA2 in the second pixel PX2, and a plurality of first pattern portions 70a having a stripe shape in the third pixel PX3. That is, Fig. 27 The optical path changing layer C70_2 may have Fig.21 The optical path changing layer 70_5 of the embodiment, Figure 3 The optical path changing layer 70 of the embodiment, and Fig.17 The optical path changing layer 70_2 of the embodiment has a compositely combined structure.

[0263] Reference Fig.28 , the optical path changing layer C70_3 may include a plurality of first pattern portions 70a having a rectangular shape in the first pixel PX1, a first pattern portion 70a in which a first sub-pattern SB1 having a rectangular shape is disposed at a central portion of the emission area LA2 and a second sub-pattern SB2 having a stripe shape is disposed at an outer portion of the emission area LA2 in the second pixel PX2, and a first pattern portion 70a in which a first sub-pattern SB1 having a rectangular shape is disposed at an outer portion of the emission area LA3 and a second sub-pattern SB2 having a stripe shape is disposed at a central portion of the emission area LA3 in the third pixel PX3. That is, Fig.28 The optical path changing layer C70_3 of the embodiment may have a Fig. 22 The optical path changing layer 70_6 of the embodiment of Fig.24 The optical path changing layer 70_8 of the embodiment, and Fig.23Therefore, when the optical path changing layer C70 is formed in a composite structure, there is an advantage that light output and external light reflectivity can be controlled for each of the pixels PX1, PX2, and PX3.

[0264] Figure 25 to Figure 28 The composite structure of the optical path changing layer shown in is an example, and the present invention is not limited thereto. Fig.13 as well as Figures 18 to 28 Various shapes of optical path changing layers can be applied Fig.15 and Fig.16 Embodiment of the invention.

[0265] Although the embodiments of the present invention have been described with reference to the accompanying drawings, it should be clear to those skilled in the art that the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the above embodiments are illustrative and non-restrictive in all aspects.

Claims

1. A display device, comprising: A first substrate including a plurality of pixels; a second substrate, facing the first substrate; as well as an optical path changing layer, disposed between the first substrate and the second substrate, the optical path changing layer comprising a first pattern portion and a second pattern portion, wherein the first pattern portion has a first refractive index, the second pattern portion has a second refractive index smaller than the first refractive index, and the first pattern portion includes a blue colorant, The first pattern portion is disposed on each of the plurality of pixels, and the second pattern portion is disposed at a boundary of each of the plurality of pixels and in contact with the first pattern portion, and The first substrate further includes an organic light emitting element disposed in each of the plurality of pixels, and the organic light emitting element outputs blue light.

2. The display device according to claim 1, wherein: The first pattern portion absorbs green wavelength light and red wavelength light, and transmits blue wavelength light.

3. The display device according to claim 2, wherein: The first pattern portion includes a first surface in contact with the first substrate, a second surface in contact with the second substrate, and a third surface and a fourth surface connecting the first surface and the second surface, and Wherein, the area of ​​the second surface is greater than the area of ​​the first surface.

4. The display device according to claim 2, wherein: The first pattern portion includes at least one of acrylic-based resin, kadox-based resin, and fluorine-containing urethane acrylate.

5. The display device according to claim 2, wherein: The second pattern portion is an air gap.

6. The display device according to claim 5, wherein: The first refractive index of the first pattern portion is 1.4 or more.

7. The display device according to claim 6, wherein: The optical path changing layer has a thickness of 5 μm or less.

8. The display device according to claim 2, wherein: The first substrate further includes an encapsulation layer covering the organic light emitting element. The second substrate includes a wavelength conversion pattern and a light-transmitting pattern and a capping layer covering the wavelength conversion pattern and the light-transmitting pattern, and Wherein, the optical path changing layer is arranged between the capping layer and the encapsulation layer.

9. A display device, comprising: a first substrate member on which a plurality of pixels are defined; an organic light emitting element disposed on the first substrate member and disposed in each of the plurality of pixels, wherein the organic light emitting element outputs blue light; An encapsulation layer, disposed on the organic light emitting element; a second base member, facing the first base member; a wavelength conversion pattern and a light-transmitting pattern, disposed between the second base member and the encapsulation layer; a capping layer, covering the wavelength conversion pattern and the light-transmitting pattern; and an optical path changing layer in contact with each of the encapsulation layer and the capping layer, wherein the optical path changing layer includes a first pattern portion having a first refractive index and a second pattern portion having a second refractive index smaller than the first refractive index, and the first pattern portion includes a blue colorant, and Each of the plurality of pixels includes an emission region and a non-emission region, the first pattern portion is disposed to correspond to the emission region, and the second pattern portion is disposed to correspond to the non-emission region.

10. The display device according to claim 9, wherein: The first pattern portion absorbs green wavelength light and red wavelength light, and transmits blue wavelength light.

11. The display device according to claim 10, wherein: The first pattern portion includes a plurality of high refraction portions and a plurality of low refraction portions respectively disposed between the plurality of high refraction portions.

12. The display device according to claim 10, further comprising: a first light blocking member disposed between the second base member and the wavelength conversion pattern and the light-transmitting pattern and disposed to correspond to a boundary of each of the plurality of pixels, The first light shielding member includes a first light shielding portion disposed on the second base member and a second light shielding portion disposed on the first light shielding portion, wherein the first light shielding portion includes a blue colorant.

13. The display device according to claim 12, further comprising: a second light blocking member disposed between the wavelength conversion pattern and the light-transmitting pattern, The second light blocking member overlaps with the first light blocking member in a thickness direction.

14. The display device according to claim 13, further comprising: A third light blocking member is disposed on the encapsulation layer, The third light blocking member overlaps with the second light blocking member in the thickness direction.

15. A display device, comprising: a first substrate, a display area including a plurality of pixels and a non-display area surrounding the display area being defined in the first substrate, the plurality of pixels each including an emission area and a non-emission area; a second substrate, facing the first substrate; as well as an optical path changing layer disposed between the first substrate and the second substrate, wherein the optical path changing layer includes a high refraction pattern portion having a refractive index of 1.4 or more and an air gap surrounding the high refraction pattern portion, The high refractive pattern portion includes a blue colorant, absorbs green wavelength light and red wavelength light, and transmits blue wavelength light, The high-refractive pattern portion is disposed to correspond to a portion of the non-emission area and the emission area, and the air gap is disposed to correspond to a portion of the non-emission area and a portion of the non-display area, and The first substrate further includes an organic light emitting element disposed in each of the plurality of pixels, and the organic light emitting element outputs blue light.

16. The display device according to claim 15, wherein: The high-refractive pattern portion is disposed on the emission area, and the air gap is disposed on the non-emission area and the non-display area.

17. The display device according to claim 15, wherein: The high refraction pattern portion includes a plurality of high refraction pattern portions disposed in an island shape on the emission area, and the air gap is disposed to surround each of the plurality of high refraction pattern portions.

18. The display device according to claim 15, wherein: The high refraction pattern portion includes a plurality of high refraction pattern portions having a stripe shape and disposed to be spaced apart on the emission area, and the air gap is disposed to surround each of the plurality of high refraction pattern portions.

19. The display device according to claim 15, wherein: The emission area includes a first emission area to a third emission area, The optical path changing layer is disposed in the first emission region to the third emission region, and The high-refraction pattern portion and the air gap have different shapes in at least one of the first to third emission regions.

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