Display device

Abstract

The present disclosure relates to a display device, which includes a plurality of pixels arranged in a row direction and a column direction intersecting the row direction. The display device includes a first substrate, which includes light-emitting elements respectively disposed in each pixel. A second substrate faces the first substrate. A plurality of optical patterns are respectively disposed in pixel columns on the second substrate and extend along the column direction. A light-blocking pattern is disposed on the second substrate. The light-blocking pattern includes a main light-blocking pattern that extends along the pixel column boundary and fills the space between adjacent optical patterns, and an auxiliary light-blocking pattern that is disposed on the optical pattern at the pixel row boundary and has a thickness smaller than that of the main light-blocking pattern.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims priority to Korean Patent Application No. 10-2019-0018750, filed with the Korean Intellectual Property Office on February 18, 2019, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

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

[0004] With the development of multimedia technology, display devices have become increasingly important. Accordingly, various display devices, such as liquid crystal display (LCD) devices and organic light emitting diode (OLED) display devices, are currently being developed.

[0005] In a display device, an organic light emitting display device includes an organic light emitting element as a self-luminous element. The organic light emitting element may include two opposing electrodes and an organic emission layer interposed between the two opposing electrodes. Electrons and holes supplied from the two electrodes recombine in the organic emission layer to generate excitons. The generated excitons relax from an excited state to a ground state, which results in the emission of light.

[0006] The organic light emitting display device does not require a separate light source. Accordingly, the organic light emitting display device consumes less power and can be manufactured relatively light and thin. The organic light emitting display device also exhibits high-quality characteristics, such as a wide viewing angle, high brightness and contrast, and a fast response speed. Thus, the organic light emitting display device attracts attention as a display device. Summary of the Invention

[0007] Aspects of the present disclosure provide a display device capable of improving color mixing of light emitted from a light emitting element of each pixel and color mixing of light emitted from each optical pattern layer.

[0008] These and other aspects, embodiments, and advantages of the present disclosure will become apparent to those of ordinary skill in the art immediately upon reading the following detailed description and the present disclosure.

[0009] According to an exemplary embodiment of the present disclosure, color mixing of light emitted from a light emitting element of each pixel and color mixing of light emitted from each optical pattern layer can be improved.

[0010] It should be noted that the effects of the present disclosure are not limited to those described above, and other effects of the present disclosure will be apparent to those skilled in the art from the following description.

[0011] According to an exemplary embodiment of the present disclosure, a display device includes a plurality of pixels. A first substrate includes light-emitting elements disposed in the plurality of pixels. A second substrate faces the first substrate. A plurality of optical patterns are disposed on the second substrate and extend in a first direction. A light-blocking pattern is disposed on the second substrate. The light-blocking pattern includes a main light-blocking pattern disposed in a space between adjacent optical patterns and an auxiliary light-blocking pattern disposed on the optical pattern and having a thickness smaller than that of the main light-blocking pattern.

[0012] According to an exemplary embodiment of the present disclosure, a display device having a plurality of pixels arranged in a row direction and a column direction intersecting the row direction includes a first substrate having light-emitting elements disposed in the plurality of pixels. A second substrate faces the first substrate. A plurality of optical patterns are disposed in pixel columns on the second substrate and extend in the column direction. A light-blocking pattern is disposed on the second substrate and extends along a pixel column boundary. The light-blocking pattern is disposed between adjacent optical patterns and is configured to fill a space between the adjacent optical patterns.

[0013] According to an exemplary embodiment of the present disclosure, a method of manufacturing a display device includes forming a light-providing unit having a first substrate including light-emitting elements disposed in a plurality of pixels. Forming a light-converting unit including a second substrate, a plurality of optical patterns disposed on the second substrate, and a light-blocking pattern disposed on the second substrate. The light-blocking pattern includes a main light-blocking pattern disposed in a space between adjacent optical patterns. The main light-blocking pattern is configured to protrude from a surface of the optical pattern in a thickness direction. Depositing a filler on the second substrate of the light-converting unit. Attaching the light-providing unit to the light-converting unit. A protruding portion of the main light-blocking pattern is configured to maintain a gap having a minimum thickness between the light-providing unit and the light-converting unit to prevent contact between the light-providing unit and the light-converting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other aspects and features of the present disclosure will become more apparent by referring to the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0015] Figure 1 is a plan view showing a layout of pixels and a light-blocking pattern of a display device according to an exemplary embodiment of the present inventive concept;

[0016] Figure 2 is according to an exemplary embodiment of the present inventive concept along Figure 1 a sectional view of the display device taken along line II-II';

[0017] Figure 3 is according to an exemplary embodiment of the present inventive concept along Figure 1A cross-sectional view of a display device taken along line III-III';

[0018] Figure 4 is a cross-sectional view of a display device taken along line IV-IV' according to an exemplary embodiment of the inventive concept; Figure 1 A cross-sectional view of a display device taken along line IV-IV';

[0019] Figure 5 is a cross-sectional view showing the blocking of light by a light-blocking pattern according to an exemplary embodiment of the inventive concept;

[0020] Figure 6 is a plan view showing the layout of pixels and a light-blocking pattern of a display device according to another exemplary embodiment of the inventive concept;

[0021] Figure 7 is a cross-sectional view of a display device taken along line VII-VII' according to an exemplary embodiment of the inventive concept; Figure 6 A cross-sectional view of a display device taken along line VII-VII';

[0022] Figure 8 is a cross-sectional view of a display device taken along line VIII-VIII' according to an exemplary embodiment of the inventive concept; Figure 6 A cross-sectional view of a display device taken along line VIII-VIII';

[0023] Figures 9 to 10 is a front view illustrating a method for manufacturing a light-blocking pattern according to an exemplary embodiment of the inventive concept;

[0024] Figure 11 is a perspective view showing a method for manufacturing a light-blocking pattern according to an exemplary embodiment of the inventive concept;

[0025] Figure 12 is a plan view showing the layout of pixels and a light-blocking pattern of a display device according to yet another exemplary embodiment of the inventive concept;

[0026] Figure 13 is a cross-sectional view of a display device taken along line XIII-XIII' according to an exemplary embodiment of the inventive concept; Figure 12 A cross-sectional view of a display device taken along line XIII-XIII';

[0027] Figure 14 is a cross-sectional view of a display device taken along line XIV-XIV' according to an exemplary embodiment of the inventive concept; Figure 12 A cross-sectional view of a display device taken along line XIV-XIV';

[0028] Figure 15 is a plan view showing the layout of modified pixels and a light-blocking pattern of an exemplary embodiment including; Figure 12 A cross-sectional view of a display device taken along line XIV-XIV';

[0029] Figure 16is a plan view showing a layout of pixels and a light blocking pattern of a display device according to still another exemplary embodiment of the inventive concept;

[0030] Figure 17 is a cross-sectional view of a display device taken along line XVII-XVII' according to an exemplary embodiment of the inventive concept; Figure 16 of;

[0031] Figure 18 is a plan view showing a layout of pixels and a light blocking pattern of a display device according to still another exemplary embodiment of the inventive concept;

[0032] Figure 19 is a plan view showing a layout of pixels and a light blocking pattern of a display device according to still another exemplary embodiment of the inventive concept; and

[0033] Figure 20 is a plan view showing a layout of pixels and a light blocking pattern of a display device according to still another exemplary embodiment of the inventive concept. DETAILED DESCRIPTION

[0034] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. However, the present invention may be embodied in different forms and should not be construed as limited to the exemplary embodiments set forth herein.

[0035] It will also be understood that when a layer is referred to as being "on" another layer or substrate, the layer may be directly on the other layer or substrate, or an intermediate layer may also be present. Throughout the specification, like reference numerals refer to like components.

[0036] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 is a plan view showing a layout of pixels and a light blocking pattern of a display device. Figure 2 is a cross-sectional view of a display device taken along line II-II' according to an exemplary embodiment of the inventive concept; Figure 1 of; Figure 3 is a cross-sectional view of a display device taken along line III-III' according to an exemplary embodiment of the inventive concept; Figure 1 of; Figure 4 is a cross-sectional view of a display device taken along line IV-IV' according to an exemplary embodiment of the inventive concept; Figure 1 of; Figure 5 is a cross-sectional view showing blocking of light by a light blocking pattern according to an exemplary embodiment of the inventive concept.

[0038] Referring to Figures 1 to 5, according to an exemplary embodiment of the inventive concept, the display device may include an organic light emitting display device, a liquid crystal display device, a quantum dot nanocell emission display device, a micro LED device, a field emission display device, an electrophoretic display device, etc. In Figure 1 the exemplary embodiment shown in

[0039] As Figure 1 shown in

[0040] the exemplary embodiment, the display area DA may be provided in the central portion of the display device 1. The display area DA may include a plurality of pixels. The plurality of pixels may be arranged in a matrix. The plurality of pixels may include a first pixel PX1 for representing a first color, a second pixel PX2 for representing a second color, and a third pixel PX3 for representing a third color. For example, the first pixel PX1 may be a red pixel that emits red light having a peak wavelength in the range of about 610 to 650 nm. The second pixel PX2 may be a green pixel that emits green light having a peak wavelength in the range of about 510 to 550 nm. The third pixel PX3 may be a blue pixel that emits blue light having a peak wavelength in the range of about 430 to 470 nm. However, in other exemplary embodiments of the inventive concept, the first pixel PX1, the second pixel PX2, and the third pixel PX3 may be configured to emit various other colors.

[0041] The first pixel PX1, the second pixel PX2, and the third pixel PX3 may be arranged in a stripe (e.g., vertical stripe or horizontal stripe) form in the matrix. In one embodiment, the pixels belonging to a pixel column may represent the same color. For example, the first pixel PX1 may be arranged in a first pixel column that extends from the edge of the display area DA to a first pixel column boundary CL1. The second pixel PX2 may be arranged in a second pixel column that extends from the first pixel column boundary CL1 to a second pixel column boundary CL2. The third pixel PX3 may be arranged in a third pixel column that extends from the second pixel column boundary CL2 to a third pixel column boundary CL3. Additional pixels among the plurality of pixels may be arranged along the row direction. However, in other exemplary embodiments of the inventive concept, the arrangement of the pixels may be changed.

[0042] A light blocking pattern may be provided at the boundary of the pixels. The light blocking pattern may include a first light blocking pattern 360 provided between the wavelength conversion layers and a second light blocking pattern 320 provided between the color filters (refer to Figure 2)). The second light blocking pattern 320 may be disposed along the pixel row boundaries RL1, RL2, and RL3 and the pixel column boundaries CL1, CL2, and CL3. The first light blocking pattern 360 may not be disposed along the pixel row boundaries RL1, RL2, and RL3, but may be disposed only along the pixel column boundaries CL1, CL2, and CL3. The light blocking pattern will be described in detail later.

[0043] Hereinafter, Figures 2 to 4 the cross-sectional structure of the display device 1 will be described in more detail with reference to

[0044] As Figures 2 to 4 shown in, the display device 1 may include a light providing unit 100, a light converting unit 300, and a filler 70.

[0045] The light providing unit 100 may include a first substrate 110, switching elements T1, T2, and T3, an insulating layer 130, a bank layer 150, organic light emitting elements ED1, ED2, and ED3, and a thin encapsulation layer 170.

[0046] The first substrate 110 may be made of a material that transmits light. For example, the first substrate 110 may be a glass substrate or a plastic substrate.

[0047] On the first substrate 110, at least one of the switching elements T1, T2, and T3 may be disposed in each of the first pixel PX1, the second pixel PX2, and the third pixel PX3 (hereinafter referred to as pixels PX1, PX2, and PX3). In addition, a plurality of signal lines (for example, gate lines, data lines, power supply lines, etc.) for transmitting signals to the switching elements T1, T2, and T3 may be further disposed on the first substrate 110.

[0048] The insulating layer 130 may be disposed above the switching elements T1, T2, and T3. The insulating layer 130 may be formed of an organic layer. For example, the insulating layer 130 may include an acrylic resin, an epoxy resin, an imide resin, an ester resin, etc.

[0049] Pixel electrodes AE1, AE2, and AE3 may be respectively disposed on the insulating layer 130 in pixels PX1, PX2, and PX3. The pixel electrodes AE1, AE2, and AE3 may be respectively connected to the switching elements T1, T2, and T3 through vias passing through the insulating layer 130.

[0050] In an exemplary embodiment, each of pixel electrodes AE1, AE2, and AE3 may be an anode electrode of respective organic light-emitting elements. Pixel electrodes AE1, AE2, and AE3 may include materials having a high work function to facilitate hole injection. For example, pixel electrodes AE1, AE2, and AE3 may include materials such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium oxide (In2O3). For a top-emission display device, pixel electrodes AE1, AE2, and AE3 may further include a reflective material layer.

[0051] The bank layer 150 may be disposed above pixel electrodes AE1, AE2, and AE3. The bank layer 150 may be formed in a lattice shape extending along pixel column boundaries CL1 and CL2 and pixel row boundaries RL1 and RL2. Additionally, the bank layer 150 may include openings that partially expose pixel electrodes AE1, AE2, and AE3. Portions of pixel electrodes AE1, AE2, and AE3 that are exposed without being covered by the bank layer 150 may be emission regions LA1, LA2, and LA3, respectively. Other portions covered by the bank layer 150 may be non-emission regions. The bank layer 150 may be made of a material including an organic insulating material.

[0052] The organic layer OL may be disposed on portions of pixel electrodes AE1, AE2, and AE3 exposed through the openings of the bank layer 150. Although the organic layer OL is shown as a single piece extending across the pixels, the organic layer OL may be separately formed in each of pixels PX1, PX2, and PX3 and may not be continuous.

[0053] The organic layer OL may include an organic emission layer. Holes supplied from the anode electrode and electrons supplied from the cathode electrode may recombine in the organic emission layer to generate excitons. The generated excitons relax from the excited state to the ground state, and thus blue light L1 may be emitted. The organic layer OL may further include auxiliary layers that assist in the injection / movement of holes and electrons.

[0054] The common electrode CE may be disposed on the organic layer OL. In an embodiment where each of pixel electrodes AE1, AE2, and AE3 is an anode electrode of respective organic light-emitting elements, the common electrode CE may be a cathode electrode of the organic light-emitting elements. The common electrode CE may include materials having a low work function to allow easy electron injection. For example, the common electrode CE may include Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF, Ba, etc. or their compounds or mixtures (e.g., a mixture of Ag and Mg).

[0055] The first pixel electrode AE1, the organic layer OL, and the common electrode CE within the first pixel column may form the first organic light-emitting element ED1. The second pixel electrode AE2, the organic layer OL, and the common electrode CE within the second pixel column may form the second organic light-emitting element ED2. The third pixel electrode AE3, the organic layer OL, and the common electrode CE within the third pixel column may form the third organic light-emitting element ED3.

[0056] The blue light L1 emitted from the organic light-emitting elements ED1, ED2, and ED3 respectively disposed in the pixels PX1, PX2, and PX3 may be provided to such pixels. In addition, the light emitted from each of the organic light-emitting elements ED1, ED2, and ED3 may be provided to adjacent pixels.

[0057] The thin encapsulation layer 170 may be disposed on the common electrode CE. To prevent impurities or moisture from infiltrating from the outside, the thin encapsulation layer 170 may be disposed above the organic light-emitting elements to seal the organic light-emitting elements ED1, ED2, and ED3. The thin encapsulation layer 170 may include a first inorganic encapsulation layer 171 containing an inorganic material, a third inorganic encapsulation layer 173 containing an inorganic material, and an organic encapsulation layer 172 disposed between the first inorganic encapsulation layer 171 and the third inorganic encapsulation layer 173.

[0058] Hereinafter, the light conversion unit 300 will be described. The light conversion unit 300 may include a second substrate 310, a second light blocking pattern 320, color filters 331, 332, and 333, optical patterns 351, 352, and 353, a plurality of stacked cover layers 341 and 342, and a first light blocking pattern 360.

[0059] The second substrate 310 faces the first substrate 110. The second substrate 310 may be made of a material including at least one material selected from the materials of the first substrate 110 listed above.

[0060] The second light blocking pattern 320 may be disposed on the surface of the second substrate 310 facing the light providing unit 100 (e.g., Figure 4 the lower side of the second substrate 310 shown in

[0061] The second light blocking pattern 320 may block the transmission of light. Specifically, the second light blocking pattern 320 may prevent color mixing of the light emitted from the pixels PX1, PX2, and PX3 to the display surface. The second light blocking pattern 320 may include at least one of an opaque organic material, a metal material including chromium, carbon black, etc.

[0062] The color filter 330 may be disposed on the surface of the second substrate 310. For example, in the exemplary embodiment shown in Figure 2 , the color filter 330 is disposed on the bottom surface of the second substrate 310. In addition, the color filter 330 may be disposed on the second light blocking pattern 320. The color filter 330 may be an absorption type filter that absorbs light of a specific wavelength and transmits light of other wavelengths.

[0063] The color filter 330 may include a first color filter 331 to a third color filter 333. The first color filter 331 to the third color filter 333 may be arranged in stripes. The first color filter 331 to the third color filter 333 may be continuous along the column direction (second direction DR2). The first color filter 331 may be disposed in the first pixel column, the second color filter 332 may be disposed in the second pixel column, and the third color filter 333 may be disposed in the third pixel column. The color filters 331, 332, and 333 may extend across the pixel row boundaries RL1, RL2, and RL3.

[0064] When the blue light L1 and the red light L2 are emitted from the first wavelength conversion pattern 351, the first color filter 331 may block or absorb the blue light L1. For example, the first color filter 331 may be used as a blue light cut-off filter that blocks the blue light L1 and transmits the red light L2. The first color filter 331 may include a red colorant.

[0065] When the blue light L1 and the green light L3 are emitted from the second wavelength conversion pattern 352, the second color filter 332 may block or absorb the blue light L1. For example, the second color filter 332 may be used as a blue light cut-off filter that blocks the blue light L1 and transmits the green light L3. The second color filter 332 may include a green colorant.

[0066] The third color filter 333 may transmit the blue light L4 emitted from the light transmission pattern 353 to be described later. The third color filter 333 may be used as a blue light transmission filter. The third color filter 333 may include a blue colorant.

[0067] The adjacent color filters 331, 332, and 333 may partially overlap each other at the pixel column boundaries CL1, CL2, and CL3, or may be spaced apart from each other so that the adjacent color filters 331, 332, and 333 do not overlap each other.

[0068] The first cover layer 341 may be disposed on the color filter. The first cover layer 341 may be disposed on the entire surfaces of the color filters 331, 332, and 333.

[0069] The first cover layer 341 may prevent impurities such as moisture and air from infiltrating from the outside to damage or contaminate the color filters 331, 332, and 333.

[0070] The first cover layer 341 may be made of an inorganic material. For example, the first cover layer 341 may be made of a material including silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, etc.

[0071] The optical pattern 350 may be disposed on the first cover layer 341. The optical pattern 350 may include a first wavelength conversion pattern 351, a second wavelength conversion pattern 352, and a light transmission pattern 353 (hereinafter simply referred to as the optical patterns 351, 352, and 353).

[0072] In an exemplary embodiment, the blue light L1 incident on the first wavelength conversion pattern 351 may be converted into red light L2 and emitted. The blue light L1 incident on the second wavelength conversion pattern 352 may be converted into green light L3 and emitted. The blue light L1 incident on the light transmission pattern 353 may be emitted as blue light without wavelength conversion.

[0073] Referring to Figure 5 , the first wavelength conversion pattern 351 may include a first matrix resin 3511 and first wavelength conversion particles 3512 dispersed in the first matrix resin 3511. The second wavelength conversion pattern 352 may include a second matrix resin 3521 and second wavelength conversion particles 3522 dispersed in the second matrix resin 3521. The light transmission pattern 353 may include a third matrix resin 3531 and may not include wavelength conversion particles. The optical patterns 351, 352, and 353 may also include scattering particles respectively dispersed in the matrix resins 3511, 3521, and 3531. For example, the scattering particles may be metal oxide particles such as titanium oxide (TiO2), silicon oxide (SiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), and tin oxide (SnO2) or organic resins such as acrylic resin and polyurethane resin.

[0074] It should be noted that the materials of the matrix resins 3511, 3521, and 3531 are not specifically limited as long as the materials of the matrix resins 3511, 3521, and 3531 have high light transmittance and the wavelength conversion particles 3512 and 3522 and the scattering particles can be well dispersed in the materials of the matrix resins 3511, 3521, and 3531. For example, each of the matrix resins 3511, 3521, and 3531 may include an organic material such as epoxy resin, acrylic resin, cardo resin, and imide resin.

[0075] The first wavelength conversion particles 3512 can convert blue light L1 into red light L2. The second wavelength conversion particles 3522 can convert blue light L1 into green light L3. Examples of the wavelength conversion particles 3512 and 3522 can include quantum dots, quantum rods, or phosphors. For example, a quantum dot can be a particulate matter that emits a color when an electron jumps from the conduction band to the valence band. When both the first wavelength conversion particles 3512 and the second wavelength conversion particles 3522 are formed of quantum dots, the diameter of the quantum dots forming the first wavelength conversion particles 3512 can be greater than the diameter of the quantum dots forming the second wavelength conversion particles 3522.

[0076] A quantum dot can be a semiconductor nanocrystal material. A quantum dot can have a specific bandgap according to the composition and size of the quantum dot, and can absorb light and emit light having an inherent wavelength. Examples of the semiconductor nanocrystals of the quantum dots can include Group-IV nanocrystals, II-VI compound nanocrystals, III-V compound nanocrystals, IV-VI nanocrystals, or a combination thereof. A quantum dot can have a core-shell structure including a core containing a nanocrystal and a shell surrounding the core.

[0077] The optical patterns 351, 352, and 353 can be arranged in stripes. Similar to the color filter 330, the first wavelength conversion pattern 351, the second wavelength conversion pattern 352, and the light transmission pattern 353 can be continuous along the column direction (the second direction DR2). The first wavelength conversion pattern 351 can be disposed in the first pixel column, the second wavelength conversion pattern 352 can be disposed in the second pixel column, and the light transmission pattern 353 can be disposed in the third pixel column. The optical patterns 351, 352, and 353 extend across the pixel row boundaries RL1, RL2, and RL3 arranged in the column direction.

[0078] In addition, the optical patterns 351, 352, and 353 can protrude in the thickness direction (e.g., Figure 4 the downward direction in

[0079] When viewed from the top, the optical patterns 351, 352, and 353 can be respectively disposed in the pixels PX1, PX2, and PX3. For example, when viewed from the top, the size of each of the optical patterns 351, 352, and 353 can be smaller than the size of the respective pixels PX1, PX2, and PX3. As a result, the optical patterns 351, 352, and 353 can be spaced apart from each other with respect to the pixel column boundaries CL1 and CL2.

[0080] There may be a horizontal difference between the area where the optical patterns 351, 352, and 353 are provided and the area where no optical pattern is provided (hereinafter referred to as the intermediate area), and the horizontal difference may be equal to the protrusion height of the optical patterns 351, 352, and 353.

[0081] The second cover layer 342 may be provided on the optical pattern 350. The second cover layer 342 may cover the optical patterns 351, 352, and 353.

[0082] The second cover layer 342 may include an inorganic material. The second cover layer 342 may be made of the same material as the first cover layer 341, or may include one of the materials listed above as the material of the first cover layer 341.

[0083] The first light-blocking pattern 360 may be provided on the second cover layer 342.

[0084] The first light-blocking pattern 360 may include at least one of the materials listed above as the material of the second light-blocking pattern 320. For example, the first light-blocking pattern 360 may be formed of an opaque organic material.

[0085] Similar to the optical patterns 351, 352, and 353, the lines of the first light-blocking pattern 360 may be arranged in stripes. The first light-blocking pattern 360 may be integrally formed along the pixel column boundaries CL1 and CL2. The first light-blocking pattern 360 may be a main light-blocking pattern provided between the optical patterns 351, 352, and 353 to prevent light mixing between the optical patterns 351, 352, and 353.

[0086] The first light-blocking pattern 360 may overlap with the second light-blocking pattern 320 in the thickness direction. For example, the first light-blocking pattern 360 may overlap with the second light-blocking pattern 320 at the pixel column boundaries CL1, CL2, and CL3. When viewed from the top, the width of the first light-blocking pattern 360 may be greater than the width of the second light-blocking pattern 320.

[0087] Specifically, the first light-blocking pattern 360 may be provided between adjacent optical patterns among the optical patterns 351, 352, and 353 so that the first light-blocking pattern 360 can fill the space between the optical patterns 351, 352, and 353. In addition, as Figure 2 shown, the first light-blocking pattern 360 may extend to the surfaces of the adjacent optical patterns 351, 352, and 353.

[0088] In addition, the first light-blocking pattern 360 may extend from the surfaces of the optical patterns 351, 352, and 353 in the thickness direction (for example, Figure 2protrudes in the downward direction). The maximum protruding thickness TP of the first light-blocking pattern 360 from the surface of each of the optical patterns 351, 352, and 353 may be about 1 to 5 μm.

[0089] As described above, the first light-blocking pattern 360 may be disposed at the boundaries between adjacent pixels among the plurality of pixels to prevent color mixing of light between the pixels PX1, PX2, and PX3. Although the first light-blocking pattern 360 is shown disposed along the pixel column boundaries CL1, CL2, and CL3 in the exemplary embodiment, in other exemplary embodiments according to the inventive concept, the pixels and the optical patterns may have various other arrangements, and the first light-blocking pattern 360 disposed between the optical patterns 350 may have another arrangement other than being positioned along the pixel column boundaries CL1, CL2, and CL3 (e.g., disposed along the pixel row boundaries RL1, RL2, and RL3, etc.).

[0090] Reference will be made to Figure 5 give a more detailed description thereof. The blue light L1 emitted from each of the organic light-emitting elements ED1, ED2, and ED3 may travel in the upward direction of the respective pixels PX1, PX2, and PX3 of the display device 1. However, as Figure 5 shown, the blue light L1 may also travel in the lateral direction toward the adjacent pixels PX1, PX2, and PX3. When this occurs, the light emitted from each of the organic light-emitting elements ED1, ED2, and ED3 may also be provided to the optical patterns 351, 352, and 353 of the adjacent pixels, which causes unwanted adjacent pixel light emission due to leakage current.

[0091] In contrast, in the display device 1 according to the exemplary embodiment of the present disclosure, the first light-blocking pattern 360 may be disposed between adjacent ones of the optical patterns 351, 352, and 353 such that the space between the optical patterns 351, 352, and 353 is filled with the first light-blocking pattern 360, and may protrude in the thickness direction (e.g., Figure 2 the downward direction) from the surfaces of the optical patterns 351, 352, and 353. As a result, it is possible to prevent the light emitted from each of the organic light-emitting elements ED1, ED2, and ED3 from traveling in the lateral direction to reach adjacent pixels.

[0092] On the other hand, as Figure 5As shown, when the optical patterns 351, 352, and 353 include wavelength-converted light and / or scattering particles, the scattered light can travel in the lateral directions toward the adjacent pixels PX1, PX2, and PX3 and in the upward direction of the pixels PX1, PX2, and PX3. When this occurs, the colors of the pixels PX1, PX2, and PX3 are mixed, and the color purity of each of the pixels PX1, PX2, and PX3 may be reduced.

[0093] The first light-blocking pattern 360 disposed between the optical patterns 351, 352, and 353 can block the wavelength-converted light and / or scattered light traveling in the lateral direction and can prevent the light from reaching the adjacent pixels PX1, PX2, and PX3. As a result, it is possible to prevent the reduction of color purity due to the adjacent pixels PX1, PX2, and PX3.

[0094] The first light-blocking pattern 360 can maintain the gap between the light-providing unit 100 and the light-converting unit 300.

[0095] Specifically, during the process of attaching the light-providing unit 100 and the light-converting unit 300 together (for example, attaching the light-providing unit 100 to the light-converting unit 300 in which the filler 70 is formed), it is desirable to attach the units together while maintaining the gap between the light-converting unit 300 and the light-providing unit 100 equal to the thickness of the filler 70 (which will be described later) to protect the elements of the light-providing unit 100 and the light-converting unit 300 that are vulnerable to impact (for example, the optical patterns 351, 352, and 353, the organic light-emitting elements ED1, ED2, and ED3).

[0096] As described later, the filler 70 disposed between the light-providing unit 100 and the light-converting unit 300 can be formed of a gel having microfluidity. The process of curing the filler 70 can be performed before the process of attaching the light-providing unit 100 and the light-converting unit 300 together. When the light-providing unit 100 and the light-converting unit 300 are attached together, the light-providing unit 100 may be set to inadvertently approach the light-converting unit 300 so that the gap is smaller than the thickness of the filler 70. When this occurs, even if the filler 70 is cured, the filler 70 may not be sufficient to prevent contact and / or collision between the light-providing unit 100 and the light-converting unit 300 during the process of attaching the light-providing unit 100 and the light-converting unit 300 together. As a result, the vulnerable organic light-emitting elements ED1, ED2, and ED3 and the wavelength-converting patterns 351 and 352 may be damaged.

[0097] In contrast, when the first light blocking pattern 360 of the exemplary embodiment is configured to maintain a gap between the light providing unit 100 and the light conversion unit 300 during the attachment process, damage to the units due to contact and / or collision can be prevented. The first light blocking pattern 360 may have an appropriate strength so as not to be damaged when there is contact and / or collision between the light providing unit 100 and the light conversion unit 300.

[0098] Returning to Figures 2 to 4 , the lower surface of the first light blocking pattern 360 may not be completely flat, but may be curved upward as shown in Figure 2 . A concave shape extending away from the light providing unit 100 may be formed at the central portion of the surface of the first light blocking pattern 360. The concave shape may be partly attributed to the level difference between the intermediate region and the region where the optical patterns 351, 352, and 353 are provided. However, the exemplary embodiment of the inventive concept is not limited thereto. For example, the protruding surface of the first light blocking pattern 360 may be substantially flat.

[0099] The display device 1 may further include a sealing member for coupling the light providing unit 100 and the light conversion unit 300 at the edge of the display device 1. The sealing member may include an organic material such as epoxy resin.

[0100] Returning to Figures 2 to 4 , a filler 70 may be disposed between the light providing unit 100 and the light conversion unit 300. The filler 70 may be disposed in a space surrounded by the light providing unit 100, the light conversion unit 300, and the sealing member. The filler 70 is made of a material that can transmit light and mitigate impact. In the exemplary embodiment, the filler 70 may be made of an organic material. For example, in one exemplary embodiment, the filler 70 may be made of a silicone-based organic material, an epoxy-based organic material, an acrylic-based organic material, etc.

[0101] The filler 70 may be in partial contact with the thin encapsulation layer 170 and the first base substrate 110 of the light providing unit 100, and may be in partial contact with the second cover layer 342 and the first light blocking pattern 360 of the light conversion unit 300.

[0102] The filler 70 may provide a flat surface above the optical patterns 351, 352, and 353 having a level difference and the first light blocking pattern 360. The filler 70 may be made of a material that can mitigate impact, and thus may serve as a buffer member that absorbs the impact generated between the light providing unit 100 and the light conversion unit 300. The filler 70 may have a sufficient thickness to maintain the gap between the light providing unit 100 and the light conversion unit 300 to serve as a buffer member. For example, as shown in Figure 2As shown, the filler 70 may have a minimum thickness TH1 between the surface of the first light-blocking pattern 360 and the light-providing unit 100. As long as the filler 70 maintains the minimum thickness TH1, it is possible to prevent the elements of the first light-blocking pattern 360 and / or the light-providing unit 100 from being worn or damaged when the first light-blocking pattern 360 comes into contact with and / or collides with the light-providing unit 100 below the first light-blocking pattern 360 after the attachment process. The minimum thickness TH1 may be about 2 to 5 μm.

[0103] Hereinafter, another exemplary embodiment of the present disclosure will be described. In the following description, the same or similar elements will be denoted by the same or similar reference numerals, and redundant descriptions will be omitted or briefly described.

[0104] Figure 6 is a plan view showing the layout of pixels of a display device and a first light-blocking pattern according to another exemplary embodiment of the inventive concept. Figure 7 is according to an exemplary embodiment of the inventive concept along Figure 6 a cross-sectional view of a display device taken along line VII-VII'. Figure 8 is according to an exemplary embodiment of the inventive concept along Figure 6 a cross-sectional view of a display device taken along line VIII-VIII'.

[0105] Referring to Figures 6 to 8 , since the auxiliary light-blocking pattern 361 is provided at the pixel row boundaries RL1 and RL2, the first light-blocking pattern 360_1 according to the exemplary embodiment of the present disclosure may be different from the first light-blocking pattern 360 according to Figure 1 the exemplary embodiment shown.

[0106] Specifically, when viewed from the top, the auxiliary light-blocking pattern 361 may be provided between adjacent lines of the first light-blocking pattern 360.

[0107] The auxiliary light-blocking pattern 361 may include substantially the same material as the first light-blocking pattern 360.

[0108] Different from the first light-blocking pattern 360, the auxiliary light-blocking pattern 361 may not block the light emitted from the emission region and the light converted in the optical patterns 351, 352, and 353 from traveling in the lateral direction.

[0109] The auxiliary light-blocking pattern 361 may be provided on each of the optical patterns 351, 352, and 353. When viewed from the top, the width of the auxiliary light-blocking pattern 361 may be smaller than the width of each of the optical patterns 351, 352, and 353. The auxiliary light-blocking pattern 361 may be provided on each of the optical patterns 351, 352, and 353 extending in the column direction. Thus, the surface of the auxiliary light-blocking pattern 361 may not include a concave shape away from the first light-blocking pattern 360 and the light-providing unit 100, but may have a substantially curved shape.

[0110] The lines of the auxiliary light-blocking pattern 361 may extend along the pixel column boundaries CL1, CL2, and CL3, and may directly contact and be connected to the ends of the adjacent lines of the first light-blocking pattern 360.

[0111] Each line of the auxiliary light-blocking pattern 361 may be connected to the adjacent lines of the first light-blocking pattern 360 on both sides. Thus, when viewed from the top, the first light-blocking pattern 360_1 may have a lattice shape in which the first light-blocking pattern 360 and the auxiliary light-blocking pattern 361 are integrally connected to each other and are arranged along the pixel row boundary RL and the pixel column boundary CL.

[0112] Each of the auxiliary light-blocking pattern 361 and the first light-blocking pattern 360 may have a maximum protrusion thickness TPa and TP from the surface of the optical patterns 351, 352, and 353.

[0113] The first light-blocking pattern 360_1 may be formed via a photolithography process. In an exemplary embodiment, a second light-blocking pattern material may be applied to the second substrate 310 on which the optical patterns 351, 352, and 353 are provided. The second light-blocking pattern material may be an opaque organic material as described above with respect to the second light-blocking pattern.

[0114] As described above, there may be a horizontal difference between the region where the optical patterns 351, 352, and 353 are provided and the intermediate region. Accordingly, the surface height of the region where the optical patterns 351, 352, and 353 are provided may be greater than the surface height of the intermediate region. Accordingly, the surface height of the second light blocking pattern material layer forming the auxiliary light blocking pattern 361 may become greater than the surface height of the second light blocking pattern material layer forming the first light blocking pattern 360. A part of the second light blocking pattern material layer provided on the optical patterns 351, 352, and 353 may move to an adjacent region (a region where the optical patterns 351, 352, and 353 are not provided), and thus the surface height may be reduced. However, the height of the second light blocking pattern material provided on the optical patterns 351, 352, and 353 may be greater than the surface height of the second light blocking pattern material layer located in the intermediate region.

[0115] As described above, the filler 70 may maintain the minimum thickness between the surface of the first light blocking pattern 360_1 and the light providing unit 100 to prevent damage caused by contact and / or collision between the first light blocking pattern 360_1 and the light providing unit 100 during the attachment process. If the surface height of the second light blocking pattern material layer forming the auxiliary light blocking pattern 361 becomes greater than the surface height of the second light blocking pattern material layer forming the first light blocking pattern 360, the overall thickness of the filler 70 may be increased to maintain the minimum thickness between the surface of the auxiliary light blocking pattern 361 having a surface height greater than that of the first light blocking pattern 360 and the light providing unit 100. This may deteriorate the light transmittance of the display device 2.

[0116] In view of the above, according to an exemplary embodiment of the present disclosure, the surface height of the first light blocking pattern 360_1 between different regions may be adjusted by using the dimming mask device M such that the surface height of the first light blocking pattern 360 from the surface of the optical patterns 351, 352, and 353 is equal to the surface height of the auxiliary light blocking pattern 361 from the surface of the optical patterns 351, 352, and 353. A more detailed description thereof will be made with reference to Figures 9 to 11 which will be described in more detail.

[0117] Figures 9 to 10 is a front view showing a method of manufacturing a light blocking pattern according to an exemplary embodiment of the inventive concept. Figure 11 is a perspective view showing a method of manufacturing a light blocking pattern according to an exemplary embodiment of the inventive concept.

[0118] Referring to Figures 9 to 11, the first light-blocking pattern 360_1 according to an exemplary embodiment of the inventive concept can be formed by using a dimming mask device M capable of adjusting the thickness between different regions. The dimming mask device M can be a halftone mask or a slit mask. In the following description, as an example, a halftone mask can be employed as the dimming mask device M.

[0119] Referring to FIG. 9, the dimming mask device M can be placed above the second light-blocking pattern material layer 60, which has been deposited on the optical patterns 351, 352, and 353 and has a level difference between the regions where the optical patterns are provided and the intermediate regions.

[0120] The second light-blocking material layer 60 can include a negative photoresist material (negative PR). However, the present disclosure is not limited thereto, and other materials can be used for the second light-blocking material layer 60. For example, the second light-blocking pattern material layer 60 can include a positive photoresist (PR). In the following description, the second light-blocking pattern material layer 60 includes a negative photoresist material (negative PR).

[0121] The dimming mask device M can include a transmissive portion FP that transmits light and a semi-transmissive and semi-reflective portion HP that blocks some of the transmitted light. As Figure 9 shown, the semi-transmissive and semi-reflective portion HP of the dimming mask device M can be disposed above the second light-blocking pattern material layer 60 on the optical patterns 351, 352, and 353, and the transmissive portion FP of the dimming mask device M can be disposed above the second light-blocking pattern material layer 60 that is not on the optical patterns 351, 352, and 353. The transmissive portions FP can be disposed adjacent to each other such that the semi-transmissive and semi-reflective portion HP is between the transmissive portions FP.

[0122] It should be noted that when a positive photoresist material is used as the second light-blocking pattern material layer 60, the positions of the semi-transmissive and semi-reflective portion HP and the transmissive portion FP can be exchanged.

[0123] Subsequently, irradiation light such as UV ultraviolet rays and CW lasers for a typical patterning process can be irradiated from above the dimming mask device M.

[0124] In the region where the transmissive portion FP of the dimming mask device M is placed, the irradiation light passes through the transmissive portion FP and irradiates the second light-blocking pattern material layer 60. In the region where the semi-transmissive and semi-reflective portion HP of the dimming mask device M is placed, at least a part of the light passes through the semi-transmissive and semi-reflective portion HP and irradiates the second light-blocking material layer 60. Therefore, a part of the second light-blocking material layer 60 below the transmissive portion FP can be developed and etched more than the part of the second light-blocking material layer 60 below the semi-transmissive and semi-reflective portion HP. Therefore, as shown in theFigure 10 As can be seen, the difference between the surface protrusion height TP of the first light blocking pattern 360 under the transmissive portion FP and the surface protrusion height TPa of the auxiliary light blocking pattern 361 under the semi-transmissive semi-reflective portion HP can be between about 0.8 and 1.2. To avoid an increase in the thickness of the filler 70, its surface protrusion heights TP and TPa can be substantially equal to each other.

[0125] In the region where the first light blocking pattern 360 is provided and the region where the auxiliary light blocking pattern 361 is provided, the filler 70 can have the same minimum thicknesses TH1 and TH2. Therefore, it is possible to avoid an increase in the thickness of the filler 70 in the region overlapping with the auxiliary light blocking pattern 361, thereby preventing an unnecessary decrease in light transmittance.

[0126] Subsequently, referring to Figure 11 , the filler 70 can be formed on the second substrate on which the first light blocking pattern 360_1 is provided. The filler 70 can be disposed above the entire surface of the second substrate.

[0127] The first light blocking patterns 360_1 disposed along the pixel row boundaries RL1, RL2, and RL3 and the pixel column boundaries CL1, CL2, and CL3 can guide the direction in which the filler 70 flows. Specifically, the first light blocking pattern 360 can guide the filler 70 so that the filler 70 flows in the pixel column direction, and the auxiliary light blocking pattern 361 can guide the filler 70 so that the filler 70 flows in the pixel row direction.

[0128] As a result, the filler 70 can move in the pixel row direction so that the filler 70 can be evenly dispersed across the pixels PX1, PX2, and PX3. Therefore, the auxiliary light blocking pattern 361 can prevent defects that may occur when the space on the second substrate is not completely filled with the filler 70.

[0129] Similar to the first light blocking pattern 360, the auxiliary light blocking pattern 361 can maintain the gap between the light providing unit 100 and the light conversion unit 300 during the attachment process so that it is possible to prevent the light providing unit 100 and the light conversion unit 300 from being damaged by contact and / or collision.

[0130] Figure 12 is a plan view showing the layout of pixels of a display device and a first light blocking pattern according to still another exemplary embodiment of the inventive concept. Figure 13 is a cross-sectional view of a display device taken along line XIII-XIII' of Figure 12 according to an exemplary embodiment of the inventive concept. Figure 14 is a cross-sectional view of a display device taken along line XIV-XIV' of Figure 12 according to an exemplary embodiment of the inventive concept.Figure 15 is a plan view showing a layout of modified pixels and a light blocking pattern including Figure 12 .

[0131] According to an exemplary embodiment of the present disclosure, a first light blocking pattern 360_2 may be different from the exemplary embodiments shown in Figure 7 and Figure 8 in that an auxiliary light blocking pattern 361_1 may be separated from the first light blocking pattern 360.

[0132] More specifically, different from the auxiliary light blocking pattern 361 shown in the exemplary embodiments according to Figure 7 and Figure 8 , a plurality of island-shaped auxiliary light blocking patterns 361_1 may be disposed between adjacent lines of the first light blocking pattern 360. The auxiliary light blocking patterns 361_1 may be separated from each other and from the adjacent lines of the first light blocking pattern 360.

[0133] Since the auxiliary light blocking pattern 361_1 according to the present exemplary embodiment is arranged in a plurality of islands, the area of the auxiliary light blocking pattern 361_1 according to the present exemplary embodiment may be slightly reduced compared to the auxiliary light blocking pattern 361 shown in Figure 7 and Figure 8 . As a result, the buffering effect of the auxiliary light blocking pattern 361_1 may be enhanced. For example, since the size of the auxiliary light blocking pattern 361_1 is reduced when viewed from the top, the flexibility of each auxiliary light blocking pattern 361_1 may be improved, and thus, the overall flexibility of the first light blocking pattern 360_2 may be improved. Therefore, when the light providing unit 100 contacts and / or collides with the light conversion unit 300, the auxiliary light blocking pattern 361_1 may effectively mitigate the impact and prevent damage to the organic light emitting element and / or the optical pattern vulnerable to external impact.

[0134] However, the present disclosure is not limited thereto. For example, some of the auxiliary light blocking patterns 361_1 may be separated from each other, while the auxiliary light blocking patterns 361_1 adjacent to the first light blocking pattern 360 may be connected to the first light blocking pattern 360 on both sides of the first light blocking pattern 360. In this embodiment, when viewed from the top, the overall size of the first light blocking pattern 360_2 may still be reduced.

[0135] When viewed from the top, the shape of the auxiliary light blocking pattern 361_1 may be rectangular. However, the exemplary embodiments of the inventive concept are not limited thereto. For example, as shown in Figure 15 , the shape of the auxiliary light blocking pattern 361_1 may be circular or oval.

[0136] When viewed from the top, the width of the auxiliary light-blocking pattern 361_1 may be equal to the width of the first light-blocking pattern 360. However, the exemplary embodiments of the inventive concept are not limited thereto. For example, the width of the auxiliary light-blocking pattern 361_1 may be greater than or less than the width of the first light-blocking pattern 360.

[0137] Similar to Figure 6 and Figure 7 the auxiliary light-blocking pattern 361 shown in, the maximum protrusion thickness TPa of the auxiliary light-blocking pattern 361_1 may be equal to the maximum protrusion thickness TP of the first light-blocking pattern 360.

[0138] In the region where the first light-blocking pattern 360 may be provided and the region where the auxiliary light-blocking pattern 361_1 may be provided, the filler 70 may have the same minimum thicknesses T1 and T2. Accordingly, in the region overlapping with the auxiliary light-blocking pattern 361_1, it may not be necessary to increase the thickness of the filler 70, thereby preventing an unnecessary decrease in light transmittance.

[0139] In addition, the auxiliary light-blocking patterns 361_1 arranged along the pixel row boundaries RL1, RL2, and RL3 may guide the direction in which the filler 70 flows so that the filler 70 may move in the pixel row direction and be evenly dispersed across the pixels PX1, PX2, and PX3. Accordingly, the auxiliary light-blocking pattern 361_1 may prevent defects caused when the second substrate is not fully filled with the filler 70.

[0140] Figure 16 is a plan view showing the layout of pixels and a first light-blocking pattern of a display device according to still another exemplary embodiment of the present disclosure. Figure 17 is a cross-sectional view of a display device taken along the line Figure 16 XVII-XVII' according to an exemplary embodiment of the present disclosure.

[0141] Referring to Figure 16 and Figure 17 , since the lines of the first light-blocking pattern 362 are separated from each other, the first light-blocking pattern 362 according to the exemplary embodiment may be different from the first light-blocking pattern 360 according to the exemplary embodiment shown in Figures 1 to 4 .

[0142] More specifically, the first light-blocking pattern 362 may extend along the pixel column boundaries CL1, CL2, and CL3, but may not be provided at the intersections with the pixel row boundaries RL1, RL2, and RL3.

[0143] Since the first light-blocking pattern 362 according to the exemplary embodiment has islands disposed separately from each other, the buffering effect of the first light-blocking pattern 362 can be enhanced. More specifically, since the size of the first light-blocking pattern 362 is reduced when viewed from the top, the flexibility of each line of the first light-blocking pattern 362 can be improved. As a result, the impact caused by the contact and / or collision between the light-providing unit 100 and the light-converting unit 300 can be effectively alleviated by the first light-blocking pattern 362, so as to prevent damage to the organic light-emitting element and / or the optical pattern vulnerable to external impact.

[0144] Figure 18 is a plan view showing the layout of pixels and a first light-blocking pattern of a display device according to still another exemplary embodiment of the inventive concept.

[0145] Referring to Figure 18 , since the auxiliary light-blocking pattern 361 according to the Figure 7 and Figure 8 exemplary embodiment is included, the first light-blocking pattern 360_3 according to the exemplary embodiment shown in Figure 18 is different from the first light-blocking pattern 362 according to the exemplary embodiment shown in Figure 16 and Figure 17 .

[0146] More specifically, the first light-blocking pattern 362 may extend along the pixel column boundaries CL1, CL2, and CL3, but may not be provided at the intersections with the pixel row boundaries RL1, RL2, and RL3. The auxiliary light-blocking pattern 361 may be provided at the intersections with the pixel row boundaries RL1, RL2, and RL3, but may not be provided at the intersections with the pixel column boundaries CL1, CL2, and CL3. When viewed from the top, the auxiliary light-blocking pattern 361 may be provided between adjacent lines of the first light-blocking pattern 362.

[0147] Figure 19 is a plan view showing the layout of pixels and a first light-blocking pattern of a display device according to still another exemplary embodiment of the inventive concept. Figure 20 is a plan view showing the layout of pixels and a first light-blocking pattern of a display device according to still another exemplary embodiment of the inventive concept.

[0148] Since the auxiliary light-blocking pattern 361 having the Figure 12 and Figure 15 shape shown in Figure 19 and Figure 20 is adopted, the first light-blocking pattern 360_4 according to the exemplary embodiment shown in Figure 18 is different from the first light-blocking pattern 360_3 according to the exemplary embodiment shown in

[0149] More specifically, the first light-blocking pattern 362 may extend along the pixel column boundaries CL1, CL2, and CL3, but may not be provided at the intersections with the pixel row boundaries RL1, RL2, and RL3.

[0150] The auxiliary light-blocking patterns 361_1 may be provided in a plurality of island shapes between adjacent lines of the first light-blocking pattern 362. The auxiliary light-blocking patterns 361_1 may be separated from each other and from the adjacent lines of the first light-blocking pattern 362.

[0151] Upon concluding the detailed description, those skilled in the art will understand that many changes and modifications can be made to the preferred embodiments without substantially departing from the principles of the present invention. Therefore, the exemplary embodiments of the inventive concept disclosed are used only in a general and descriptive sense and not for the purpose of limitation.

Claims

1. A display device including a plurality of pixels, wherein, The display device includes: A first substrate, the first substrate including light-emitting elements provided in the plurality of pixels; A second substrate, the second substrate facing the first substrate; A plurality of optical patterns, the plurality of optical patterns provided on the second substrate and extending in a first direction, each of the plurality of optical patterns spanning at least two pixels in the first direction; and A light-blocking pattern, the light-blocking pattern provided on the second substrate, wherein the light-blocking pattern includes a main light-blocking pattern provided in a space between adjacent optical patterns and an auxiliary light-blocking pattern provided on the optical pattern and having a thickness smaller than that of the main light-blocking pattern, Wherein: The plurality of pixels are arranged in a row direction and a column direction intersecting the row direction; The plurality of optical patterns are provided in pixel columns on the second substrate and extend in the column direction; the main light-blocking pattern extends along a pixel column boundary provided between adjacent pixel columns, The auxiliary light-blocking pattern is provided on the optical pattern at a pixel row boundary provided between adjacent pixel rows.

2. The display device according to claim 1, Among them, When viewed from the top, each of the optical patterns has a stripe shape, and Wherein, a surface height of the main light-blocking pattern from a surface of the optical pattern is 0.8 to 1.2 times a surface height of the auxiliary light-blocking pattern.

3. The display device according to claim 1, wherein, The auxiliary light-blocking pattern includes a plurality of island patterns separated from each other.

4. The display device according to claim 1, wherein, The auxiliary light-blocking pattern extends along the pixel row boundary.

5. The display device according to claim 4, wherein, When viewed from the top, lines of the main light-blocking pattern adjacent to each other and lines of the auxiliary light-blocking pattern are connected to form a lattice shape.

6. The display device according to claim 1, wherein, The main light-blocking pattern contacts a side surface of the adjacent optical pattern and partially covers a lower surface of the adjacent optical pattern.

7. The display device according to claim 1, wherein, The main light-blocking pattern protrudes from the surface of the optical pattern in a thickness direction.

8. The display device according to claim 7, wherein, A protruding thickness of the main light-blocking pattern from the surface of the optical pattern is in a range of 1 μm to 5 μm.

9. The display device according to claim 1, wherein, The display device further includes: An encapsulation layer, the encapsulation layer covering the light-emitting elements; and A filler, the filler provided between the encapsulation layer and the optical pattern.

10. The display device according to claim 9, wherein, The filler is in direct contact with the main light-blocking pattern at the pixel column boundary.

11. The display device according to claim 10, wherein, The filler is in direct contact with the auxiliary light-blocking pattern at the pixel row boundary.

12. The display device according to claim 11, wherein, The filler has a minimum thickness in a region where the filler overlaps with the light-blocking pattern.

13. The display device according to claim 1, wherein, Each of the light-emitting elements emits blue light, and the adjacent optical patterns are configured to receive the blue light and convert a wavelength of the blue light to emit light having a different wavelength.

14. A display device including a plurality of pixels arranged in a row direction and a column direction intersecting the row direction, wherein, The display device includes: A first substrate, the first substrate including light-emitting elements provided in the plurality of pixels; A second substrate, the second substrate facing the first substrate; A plurality of optical patterns, the plurality of optical patterns provided in pixel columns on the second substrate and extending in a column direction, each of the plurality of optical patterns spanning at least two pixels in a first direction; and A light-blocking pattern including a main light-blocking pattern and an auxiliary light-blocking pattern, wherein the main light-blocking pattern is disposed on the second substrate and extends along a pixel column boundary provided between adjacent pixel columns, and the auxiliary light-blocking pattern is disposed on the optical pattern at a pixel row boundary provided between adjacent pixel rows. Wherein the main light-blocking pattern is disposed between adjacent optical patterns and configured to fill a space between the adjacent optical patterns.

15. The display device according to claim 14, wherein, The display device further includes: An encapsulation layer that covers the light-emitting element; and A filler disposed between the encapsulation layer and the optical pattern. Wherein the filler is in direct contact with the light-blocking pattern at the pixel column boundary.

16. The display device according to claim 14, wherein, The light-blocking pattern contacts and partially covers a side surface of the adjacent optical pattern.

17. The display device according to claim 14, wherein, The main light-blocking pattern has a stripe shape that extends integrally along the pixel column boundary.

18. The display device according to claim 14, wherein, Each of the light-blocking patterns includes a plurality of light-blocking patterns that are separated from each other, and a pixel row boundary is provided between the plurality of light-blocking patterns.

19. The display device according to claim 14, wherein, The light-blocking pattern protrudes from a surface of the optical pattern in a thickness direction, and wherein a protruding thickness of the light-blocking pattern is in a range of 1 μm to 5 μm.

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