Display module and head-mounted display device comprising the same

Abstract

A display module includes a plurality of light emitting elements, and a sealing member sealing the plurality of light emitting elements. The sealing member includes a base including a transparent substance, and a cover layer. The cover layer is in contact with one face of the base, and includes a plurality of first patterns and a plurality of second patterns. The plurality of first patterns are respectively recessed at a first depth, and the plurality of second patterns are respectively recessed at a second depth different from the first depth.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a display module and a display apparatus including the same, and more particularly, to a head-mounted display apparatus worn on a user's head. BACKGROUND

[0002] A head-mounted display apparatus, as a display apparatus worn on a head, can be used to implement augmented reality or virtual reality. A head-mounted display apparatus for implementing augmented reality can provide a virtual graphic image through a semi-transparent display. At this time, a user can simultaneously recognize a virtual graphic image and an actual thing. A head-mounted display apparatus for implementing virtual reality provides a virtual graphic image through a user's eyes. A user can experience virtual reality through a virtual content.

[0003] A screen-door effect (SDE) is one of noise patterns recognized by a user through a display apparatus, and is also called fixed-pattern noise. The screen-door effect (SDE) is generated within a pixel due to a difference in brightness between a center portion and a peripheral portion of a light emitting element, and if the screen-door effect (SDE) is caused, a boundary portion between pixels is recognized by a user, and thus display quality can be degraded.

[0004] Compared to a general flat panel display apparatus, a head-mounted display apparatus provides a wider range of a field of view to a user, and thus degradation of display quality caused by a screen-door effect (SDE) can occur more greatly in a head-mounted display apparatus. SUMMARY

[0005] An object of the disclosure is to provide a display module and a head-mounted display apparatus having a reduced screen-door effect (SDE).

[0006] A display module according to an embodiment of the disclosure can include a plurality of light emitting elements, and a sealing member sealing the plurality of light emitting elements. The sealing member can include a base including a transparent substance, and a cover layer. The cover layer can be in contact with one face of the base, and the cover layer can include a plurality of first patterns and a plurality of second patterns, the plurality of first patterns being respectively recessed at a first depth, and the plurality of second patterns being respectively recessed at a second depth different from the first depth.

[0007] In an embodiment of the disclosure, the cover layer can include silicon dioxide.

[0008] According to an embodiment of the disclosure, the plurality of first patterns and the plurality of second patterns can be alternately arranged with each other.

[0009] In an embodiment of the disclosure, the thickness of the base can be 100 μm or more and 300 μm or less, the thickness of the cover layer can be 500 nm or more and 600 nm or less, and the first depth and the second depth can be 100 nm or more and 200 nm or less, respectively.

[0010] In an embodiment of the disclosure, the second depth can be greater than the first depth, and a difference between the second depth and the first depth can be 70 nm or more and 90 nm or less.

[0011] In an embodiment of the disclosure, the cover layer can include a plurality of third patterns, the plurality of third patterns can be recessed at a third depth different from the first depth and the second depth, and the third depth can be 100 nm or more and 200 nm or less.

[0012] In an embodiment of the disclosure, among the first depth, the second depth, and the third depth, a difference between a depth having a maximum value and a depth having a minimum value can be 70 nm or more and 90 nm or less.

[0013] In an embodiment of the disclosure, the plurality of first patterns, the plurality of second patterns, and the plurality of third patterns can be alternately arranged with each other.

[0014] In an embodiment of the disclosure, the plurality of second patterns can be arranged between any one of the plurality of first patterns and any one of the plurality of third patterns, respectively.

[0015] In an embodiment of the disclosure, an angle formed by an inner side of at least any one of the plurality of first patterns and the plurality of second patterns defined in the cover layer and the base can be 60 degrees or more and 85 degrees or less.

[0016] A display module according to an embodiment of the disclosure can include a plurality of light emitting elements and a sealing member. The sealing member can seal the plurality of light emitting elements, and the sealing member can include a base including a transparent substance and a cover layer disposed on one surface of the base.

[0017] The cover layer can include a base layer in contact with the one side of the base, a plurality of first patterns each protruding by a first length from the base layer and spaced apart by a first pitch, a plurality of second patterns each protruding by a second length from one side of a corresponding first pattern of the plurality of first patterns, and a plurality of third patterns each protruding by the second length from the other side of the corresponding first pattern of the plurality of first patterns.

[0018] In an embodiment of the disclosure, the plurality of second patterns can be spaced apart from a corresponding third pattern of the plurality of third patterns by a second pitch.

[0019] In an embodiment of the disclosure, the cover layer can include silicon dioxide.

[0020] In an embodiment of the disclosure, the base can have a thickness of 100 μm or more and 300 μm or less, the base layer can have a thickness of 250 nm or more and 400 nm or less, the first length can be 70 nm or more and 90 nm or less, and the second length can be 10 nm or more and 130 nm or less.

[0021] In an embodiment of the disclosure, each side surface of the plurality of first patterns or each side surface of the plurality of second patterns can form an angle of 60 degrees or more and 85 degrees or less with the base layer.

[0022] A head-mounted display device according to an embodiment of the disclosure can include a display module including a plurality of light emitting elements and a sealing member sealing the light emitting elements, a main body portion accommodating the display module and defining an opening portion exposing at least a portion of the display module to a user, and a band portion connected to the main body portion and configured to fix the main body portion to a head portion of the user.

[0023] The sealing member can include a base portion including a transparent substance and a cover layer in contact with one side of the base portion. The cover layer can include a plurality of first patterns each recessed by a first depth and a plurality of second patterns each recessed by a second depth different from the first depth.

[0024] According to an embodiment of the disclosure, a display device and a head-mounted display device having reduced screen-door effect (SDE) can be provided.

[0025] Accordingly, a display device and a head-mounted display device having improved display quality and visibility can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a perspective view of a display device according to an embodiment of the disclosure.

[0027] Figure 2 An example is shown wearing the display device Figure 1 The user of the display device shown.

[0028] Figure 3 An example is shown wearing the display device Figure 1 The main body, buffer and display module of the display device shown.

[0029] Figure 4A An example is shown in a part of the plane of the display module according to an embodiment of the present disclosure.

[0030] Figure 4B An example is shown in a part of the cross section taken along I-I' of the display module shown. Figure 4A

[0031] Figure 5 An example is shown in the AA region shown. Figure 4B

[0032] Figure 6A An example is shown in the AA region shown. Figure 6B

[0033] Figure 7 An example is shown in the AA region shown. Figure 8 Figure 5

[0034] Figure 9 An example is shown in a part of the plane of the display module according to an embodiment of the present disclosure.

[0035] Figure 10 An example is shown in a part of the cross section taken along I-I' of the display module shown. Figure 11 DETAILED DESCRIPTION Figure 4A Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0036] In the drawings, the proportions and sizes of the constituent elements are exaggerated for the sake of effective illustration of the technical content. "And / or" includes all combinations of one or more of the relevant constituents.

[0037] It should be understood that the terms "comprise" and the like are used to specify the presence of stated features, numbers, steps, actions, constituent elements, components or combinations thereof in the specification, and do not preclude the presence or addition of one or more other features, numbers, steps, actions, constituent elements, components or combinations thereof.

[0038] It should be understood that the terms "comprise" and the like are used to specify the presence of stated features, numbers, steps, actions, constituent elements, components or combinations thereof in the specification, and do not preclude the presence or addition of one or more other features, numbers, steps, actions, constituent elements, components or combinations thereof.

[0039] Figure 1 ​​​​​​A perspective view of a display device HMD according to an embodiment of the present disclosure. Figure 2 An example is shown in which a user US wearing a display device HMD is looking at a virtual object. Figure 1 An example is shown in which a user US wearing a display device HMD is looking at a virtual object.

[0040] Referring to Figure 1 Figure 2 The display device HMD can be a head-mounted display device that can be worn on the head of the user US. The display device HMD can provide an image to the user US in a state in which the peripheral vision of the user US is cut off. Since the peripheral vision is cut off, the user US wearing the display device HMD can more easily immerse in virtual reality.

[0041] The display device HMD can include a main body part 100, a band part 200, a cushion part 300, and display modules DM-L, DM-R (see Figure 3 ).

[0042] The main body part 100 can be a part corresponding to the eyes of the user US. The main body part 100 can accommodate the display modules DM-L, DM-R that display an image, an acceleration sensor SS1, a proximity sensor SS2, an operation module CM, etc.

[0043] The acceleration sensor SS1 senses the movement of the user US, and the display modules DM-L, DM-R can provide an image corresponding to the movement to the user. Accordingly, the user US can experience virtual reality identical to actual reality.

[0044] The proximity sensor SS2 serves to determine whether the user is wearing the display device HMD, and can sense whether a part of the body of the user US is close or a part of the body of the user US applies pressure to the display device HMD.

[0045] The operation module CM is a part for adjusting the volume or the brightness of a screen, etc., and can be provided as a physical button or in a touch screen form.

[0046] The band part 200 can be combined with the main body part 100. The user US can fix the main body part 100 to the head using the band part 200.

[0047] The band part 200 can include a main band 210 and a sub band 220.

[0048] The main band 210 can be worn along the head of the user US. The main band 210 can allow the main body part 100 to be close to the head of the user US. The sub band 220 can connect the main body part 100 and the main band 210 along the upper part of the head of the user US. The sub band 220 can prevent the main body part 100 from falling. In addition, the sub band 220 can distribute the weight of the main body part 100, and can provide the user US with an improved wearing feeling. ​

[0049] As long as the display device HMD can be fixed to the user US, the main body 100 and the band 200 can be deformed into various shapes different from the shape shown in Figure 1 and Figure 2 . In addition, in another embodiment of the present disclosure, the display device HMD can have a helmet shape or a glasses shape, etc.

[0050] The cushion 300 can be disposed on one side of the main body 100. The one side can be a side that faces the user US when the user US uses the display device HMD. The cushion 300 can include a substance that is free to deform in shape. The cushion 300 can include a high molecular resin. For example, the cushion 300 can include polyurethane, polycarbonate, polypropylene, or polyethylene, or can include a sponge formed by foaming a rubber solution, a polyurethane series substance, or an acrylic series substance. However, the substance constituting the cushion 300 is not limited to the above examples.

[0051] The cushion 300 can improve the wearing feeling of the display device HMD. The cushion 300 can be detachable or attached with respect to the main body 100. In an embodiment of the present disclosure, the cushion 300 can also be omitted.

[0052] Figure 3 The main body 100, the cushion 300, and the display modules DM-L, DM-R of the display device HMD shown in Figure 1 are exemplarily shown.

[0053] Referring to Figure 3 , the display modules DM-L, DM-R can include a left-eye display module DM-L and a right-eye display module DM-R. In Figure 3 , it is exemplarily shown that the display device HMD includes a total of two display modules including one left-eye display module DM-L and one right-eye display module DM-R, but is not limited thereto. For example, in other embodiments of the present disclosure, the display device HMD can include only one display module. That is, the left-eye display module DM-L and the right-eye display module DM-R can be provided as one body.

[0054] The display modules DM-L, DM-R provide an image through a display area, and the display area can be parallel to a plane defined by the first direction axis DR1 and the second direction axis DR2. The normal direction of the display area, that is, the thickness direction of the display modules DM-L, DM-R can be designated by the third direction axis DR3.

[0055] In a region of the main body 100, an opening portion OP-L, OP-R can be defined. The opening portion OP-L, OP-R can include a left eye opening portion OP-L and a right eye opening portion OP-R. A user US (refer to Figure 2 ) can view and listen to an image provided by the left eye display module DM-L through the left eye opening portion OP-L and can view and listen to an image provided by the right eye display module DM-R through the right eye opening portion OP-R.

[0056] The left eye display module DM-L and the right eye display module DM-R provide independent image information to the left eye and the right eye of the user US, respectively, so that the user US can experience a sense of space from the images provided by the display modules DM-L, DM-R.

[0057] Figure 4A A portion of a plane of the display modules DM-L, DM-R according to an embodiment of the disclosure is exemplarily shown. Figure 4B A portion of a cross section taken along I-I' of the display modules DM-L, DM-R is exemplarily shown. Figure 4A A portion of the AA region shown in FIG. 10A is exemplarily shown. Figure 5 A portion of the AA region shown in FIG. 10A is exemplarily shown. Figure 4B A portion of the AA region shown in FIG. 10A is exemplarily shown. Figure 6A A portion of the AA region shown in FIG. 10A is exemplarily shown. Figure 6B A portion of the AA region shown in FIG. 10A is exemplarily shown.

[0058] Referring to Figure 4B , the display modules DM-L, DM-R can include a planar layer PL, a plurality of light emitting elements LD1, LD2, LD3, a pixel definition film PDL, and a sealing member ECP.

[0059] The planar layer PL can include an organic material or an inorganic material.

[0060] The plurality of light emitting elements LD1, LD2, LD3 can be disposed on the planar layer PL. The plurality of light emitting elements LD1, LD2, LD3 can emit light having mutually different colors.

[0061] The first light emitting element LD1 can emit red light. The first light emitting element LD1 can include an anode ADE, a hole transport region HTR, a first light emitting layer EML1, an electron transport region ETR, and a cathode CTD.

[0062] In the case where the first light-emitting layer EML1 emits red light, the first light-emitting layer EML1 can include, for example, a fluorescent substance including PBD:Eu(DBM)3(tris(dibenzoylmethanato)phenanthoroline europium) or Perylene. The dopant included in the first light-emitting layer EML1 can be, for example, selected from a metal complex or an organometallic complex such as PIQIr(acac) (bis(1-phenylisoquinoline)acetylacetonate iridium), PQIr(acac) (bis(1-phenylquinoline)acetylacetonate iridium), PQIr(tris(1-phenylquinoline) iridium), and PtOEP (octaethylporphyrin platinum).

[0063] The second light-emitting element LD2 can emit green light. The second light-emitting element LD2 can include an anode ADE, a hole control region HTR, a second light-emitting layer EML2, an electron control region ETR, and a cathode CTD.

[0064] In the case where the second light-emitting layer EML2 emits green light, the second light-emitting layer EML2 can include, for example, a fluorescent substance including Alq3 (tris(8-hydroxyquinolino)aluminum). The dopant included in the second light-emitting layer EML2 can be, for example, selected from a metal complex or an organometallic complex such as Ir(ppy)3 (fac-tris(2-phenylpyridine)iridium).

[0065] The third light-emitting element LD3 can emit blue light. The third light-emitting element LD3 can include an anode ADE, a hole control region HTR, a third light-emitting layer EML3, an electron control region ETR, and a cathode CTD.

[0066] In a case where the third light-emitting layer EML3 emits blue light, the third light-emitting layer EML3 may, for example, contain a fluorescent substance containing any one selected from the group consisting of spiro-DPVBi (spiro- DPVBi), spiro-6P (spiro-6P), distyryl-benzene (DSB), distyryl-arylene (DSA), polyfluorene (PFO), and poly(p-phenylene vinylene) (PPV). The dopant contained in the third light-emitting layer EML3 may, for example, be selected from a metal complex such as (4,6-F2ppy)2Irpic or an organometallic complex.

[0067] Figure 4B The light-emitting elements LD1, LD2, and LD3 are exemplified as organic light-emitting elements OLED, but are not limited thereto. In another embodiment of the present disclosure, the light-emitting elements LD1, LD2, and LD3 can be micro-LEDs, respectively.

[0068] The sealing member ECP seals the light-emitting elements LD1, LD2, and LD3, and protects the light-emitting elements LD1, LD2, and LD3 from external oxygen or moisture.

[0069] The sealing member ECP can include a base BS and a cover layer CL. The thickness WD-BS of the base BS is 100 μm or more and 300 μm or less, and the thickness WD-CL of the cover layer CL is 500 nm or more and 600 nm or less.

[0070] The base BS contains a transparent substance, and can transmit light emitted from the light-emitting elements LD1, LD2, and LD3. The transparent substance can be glass.

[0071] The cover layer CL can be disposed on one face of the base BS. The cover layer CL can contain silicon dioxide.

[0072] The cover layer CL can include a pattern PT-G, PT-B for diffracting light transmitted through the base BS.

[0073] The pattern PT-G, PT-B can include a recessed pattern PT-G and a protruding pattern PT-B. As the recessed pattern PT-G is engraved on one face of the cover layer CL, the opposite protruding portion can be defined as the protruding pattern PT-B.

[0074] In an embodiment of the present disclosure, the recessed pattern PT-G can be formed by a photomask (e.g., a slit mask or a half-tone mask).

[0075] Referring toFigure 5 The etching pattern PT-G can include a plurality of first etching patterns PT-G1 and a plurality of second etching patterns PT-G2.

[0076] In an embodiment of the disclosure, a distance between a center of any one of the etching patterns PT-G and a center of another etching pattern adjacent to the any one of the etching patterns can be about 3 μm or more and 12 μm or less. Each of the first etching patterns PT-G1 can be etched with a first depth DH1, and each of the second etching patterns PT-G2 can be etched with a second depth DH2 different from the first depth DH1.

[0077] The first etching patterns PT-G1 and the second etching patterns PT-G2 can be disposed adjacent to each other. That is, the etching patterns PT-G having different depths from each other can be alternately disposed with each other.

[0078] In an embodiment of the disclosure, the first depth DH1 and the second depth DH2 can be 100 nm or more and 200 nm or less, respectively. In an embodiment of the disclosure, the second depth DH2 can be greater than the first depth DH1, and a difference between the second depth DH2 and the first depth DH1 can be 70 nm or more and 90 nm or less.

[0079] The diffraction of light emitted from the light emitting elements LD1, LD2, and LD3 is determined by the depth of the etching pattern PT-G, and thus the degree of diffraction of light passing through the first etching patterns PT-G1 having the first depth DH1 is different from the degree of diffraction of light passing through the second etching patterns PT-G2 having the second depth DH2.

[0080] Referring to Figure 6B The pixel area AR is an area corresponding to any one of the light emitting elements LD1, LD2, and LD3. The pixel area AR can include a central area AR-C overlapping any one of the light emitting layers EML1, EML2, and EML3 and a peripheral area AR-E adjacent to the central area AR-C.

[0081] Referring to Figure 6A The first curve GPH-C is a curve corresponding to a change in luminance of the central area AR-C based on a change in depth of the etching pattern PT-G, and the second curve GPH-E is a curve corresponding to a change in luminance of the peripheral area AR-E based on a change in depth of the etching pattern PT-G.

[0082] Referring to Figure 6A and Figure 6BWhen the depth of the engraved pattern PT-G is a, the luminance of the central region AR-C is higher than that of the peripheral region AR-E. When the depth of the engraved pattern PT-G is b, which is larger than a, the luminance of the central region AR-C is the same as that of the peripheral region AR-E. When the depth of the engraved pattern PT-G is c, which is larger than b, the luminance of the central region AR-C is lower than that of the peripheral region AR-E. When the depth of the engraved pattern PT-G is d, which is larger than c, the luminance of the central region AR-C is the same as that of the peripheral region AR-E. When the depth of the engraved pattern PT-G is e, which is larger than d, the luminance of the central region AR-C is higher than that of the peripheral region AR-E.

[0083] The change in the luminance of the central region AR-C and the peripheral region AR-E is due to the degree of light diffraction varying depending on the depth of the engraved pattern PT-G. Therefore, the depth of the engraved pattern PT-G can be determined based on the difference in the luminance of the central region AR-C and the peripheral region AR-E. For example, the depth of the engraved pattern PT-G can be determined to be a value b or d at which the luminance of the central region AR-C is the same as that of the peripheral region AR-E (refer to FIG. 6). Figure 6A ).

[0084] In the actual process of forming the engraved pattern PT-G, it is difficult to uniformly form the depth of the engraved pattern PT-G to be b or d, and in practice, there is a difference in the luminance of the central region AR-C and the peripheral region AR-E as when the depth is a or e. Therefore, in order to offset the difference in the luminance between the central region AR-C and the peripheral region AR-E, a plurality of engraved patterns PT-G having mutually different depths can be formed on one side of the cover layer CL as shown in FIGS. 7 and 8. Figure 4B and Figure 5 In the actual process of forming the engraved pattern PT-G, it is difficult to uniformly form the depth of the engraved pattern PT-G to be b or d, and in practice, there is a difference in the luminance of the central region AR-C and the peripheral region AR-E as when the depth is a or e. Therefore, in order to offset the difference in the luminance between the central region AR-C and the peripheral region AR-E, a plurality of engraved patterns PT-G having mutually different depths can be formed on one side of the cover layer CL as shown in FIGS. 7 and 8.

[0085] Hereinafter, a structure shown in FIG. 9 will be described with the protruding pattern PT-B as the center. Figure 5

[0086] The cover layer CL can include a base layer BL and a protruding pattern PT-B. The base layer BL can be in contact with the base portion BS.

[0087] In an embodiment of the disclosure, the thickness of the base layer BL can be 250 nm or more and 400 nm or less.

[0088] ​The protrusion pattern PT-B can include first protrusion patterns PT-B1, second protrusion patterns PT-B2, and third protrusion patterns PT-B3.

[0089] The first protrusion pattern PT-B1 can protrude by a first length LL1 amount from the base layer BL. The first protrusion patterns PT-B1 can be spaced apart from each other by a first pitch DT1 amount. In an embodiment of the disclosure, the first length LL1 can be 70 nm or more and 90 nm or less. In an embodiment of the disclosure, the first pitch DT1 can be about 1.5 µm or more and 7.5 µm or less.

[0090] In an embodiment of the disclosure, a width WD1 (hereinafter referred to as a first width) of each of the first protrusion patterns PT-B1 can be about 4 µm or more and 20 µm or less.

[0091] Each of the second protrusion patterns PT-B2 can protrude by a second length LL2 amount from a first side of the corresponding first protrusion pattern PT-B1. In an embodiment of the disclosure, the second length LL2 can be 10 nm or more and 130 nm or less.

[0092] In an embodiment of the disclosure, a width WD2 (hereinafter referred to as a second width) of each of the second protrusion patterns PT-B2 can be about 1 µm or more and 6 µm or less.

[0093] Each of the third protrusion patterns PT-B3 can protrude by the second length LL2 amount from a second side of the corresponding first protrusion pattern PT-B1.

[0094] In an embodiment of the disclosure, the second length LL2 has the same value as the first depth DH1, and a sum of the first length LL1 and the second length LL2 has the same value as the second depth DH2.

[0095] Each of the second protrusion patterns PT-B2 can be spaced apart from the corresponding third protrusion pattern PT-B3 by a second pitch DT2 amount. In an embodiment of the disclosure, the second pitch DT2 can be about 1.5 µm or more and 7.5 µm or less. In an embodiment of the disclosure, the first pitch DT1 and the second pitch DT2 can be substantially the same.

[0096] Figure 7 and Figure 8 exemplarily show Figure 5 deformed embodiments of the AA region of

[0097] Referring to the AA-1 region of Figure 7 the engraved pattern PT-G0 can include first engraved patterns PT-G1, second engraved patterns PT-G2, and third engraved patterns PT-G3.

[0098] Each of the first recessed patterns PT-G1 can be recessed at a first depth DH1, each of the second recessed patterns PT-G2 can be recessed at a second depth DH2 different from the first depth DH1, and each of the third recessed patterns PT-G3 can be recessed at a third depth DH3 different from the first depth DH1 and the second depth DH2.

[0099] In one embodiment of the present disclosure, the first depth DH1, the second depth DH2, and the third depth DH3 can each be 100 nm or more and 200 nm or less.

[0100] In one embodiment of the present disclosure, the third depth DH3 can be greater than the first depth DH1, and the second depth DH2 can be greater than the third depth DH3. In this case, a difference between the first depth DH1 and the second depth DH2 can be 70 nm or more and 90 nm or less.

[0101] The first recessed patterns PT-G1, the second recessed patterns PT-G2, and the third recessed patterns PT-G3 can be arranged adjacent to each other. That is, the recessed patterns PT-G0 having mutually different depths can be alternately arranged with each other.

[0102] Reference Figure 8 The recessed pattern PT-G10 can include a plurality of first recessed patterns PT-G11 and a plurality of second recessed patterns PT-G12 having different depths. The first recessed patterns PT-G11 and the second recessed patterns PT-G12 are alternately formed. In one embodiment of the present disclosure, the recessed pattern PT-G10 can have a shape different from the recessed pattern PT-G of Figure 5 and the recessed pattern PT-G0 of Figure 7 . Figure 5 The recessed pattern PT-G of Figure 7 and the recessed pattern PT-G0 have a rectangular or square cross-sectional shape, and in one embodiment of the present disclosure, the recessed pattern PT-G10 has a trapezoidal cross-sectional shape. An upper edge width and a lower edge width of the first recessed patterns PT-G11 can each be different from an upper edge width and a lower edge width of the second recessed patterns PT-G12.

[0103] An angle θ formed by the inner side surface SF of the recessed pattern PT-G10 and the base layer BL or the base portion BS can be 60 degrees or more and 85 degrees or less. f

[0104] Further, the description of Figure 8 is substantially the same as the description of Figure 5 , and is omitted here.

[0105] Figure 9 ​A portion of the plane of a display module DM-L1, DM-R1 according to an embodiment of the present disclosure is shown as an example.

[0106] Reference Figure 9 The engraved patterns PT-G on display modules DM-L1 and DM-R1 can be arranged to form a predetermined angle θ with the second direction axis DR2. p The predetermined angle θ p It can be between approximately 5 degrees Celsius and 50 degrees Celsius.

[0107] Figure 10 and Figure 11 Examples are shown along Figure 4A A portion of the cross-section taken from section II'.

[0108] Reference Figure 10 The light-emitting elements LD1, LD2, and LD3 can be sealed by the sealing component ECP-1. The sealing component ECP-1 may include a thin-film encapsulation layer TFE and a cover layer CL-1.

[0109] The thin-film encapsulation layer TFE can contact and cover the light-emitting elements LD1, LD2, and LD3.

[0110] The thin-film encapsulation layer TFE may include a first inorganic layer CVD1, an organic layer MN, and a second inorganic layer CVD2. Figure 10 The example illustrates a TFE encapsulation layer comprising two inorganic layers and one organic layer, but is not limited thereto. For instance, the TFE encapsulation layer may comprise three inorganic layers and two organic layers, in which case it may have a structure with alternating layers of inorganic and organic layers.

[0111] In one embodiment of this disclosure, the cover layer CL-1, which defines patterns PT-G and PT-B, can be directly disposed on the thin-film encapsulation layer TFE.

[0112] In addition, for Figure 10 The description of the cover layer CL-1 shown is essentially the same as the description of the cover layer CL mentioned above.

[0113] Reference Figure 11 The light-emitting elements LD1, LD2, and LD3 can be sealed by the thin-film encapsulation layer TFE-1.

[0114] The thin-film encapsulation layer TFE-1 may include a first inorganic layer CVD1, an organic layer MN, and a second inorganic layer CVD2-1.

[0115] Patterns PT-G and PT-B can be defined in the second inorganic layer CVD2-1.

[0116] The role of the patterns PT-G and PT-B in the second inorganic layer CVD2-1 is related to... Figures 4A to 10The patterns PT-G, PT-B described in the above description have substantially the same function.

[0117] The embodiments disclosed in the present disclosure are explained with reference to the drawings, but it should be understood by those skilled in the art that the present disclosure can be variously modified and changed without departing from the scope of the idea and technical field of the present disclosure. In addition, the embodiments disclosed in the present disclosure are not intended to limit the technical idea of the present disclosure, and should be interpreted as all technical ideas within the same scope of the present disclosure being included in the scope of the rights of the present disclosure.

Claims

1. A display module, wherein, including: a plurality of light emitting elements; and, a sealing member sealing the plurality of light emitting elements, the sealing member including: a base portion including a transparent substance; and, a cover layer in contact with one face of the base portion, the cover layer including a plurality of first patterns each recessed at a first depth and a plurality of second patterns each recessed at a second depth different from the first depth, the difference between the second depth and the first depth being determined based on a luminance difference between a central region and a peripheral region of a pixel region corresponding to at least any one of the plurality of light emitting elements, the plurality of first patterns and the plurality of second patterns being alternately arranged with each other in one direction, the second depth being greater than the first depth, the difference between the second depth and the first depth being 70 nm or more and 90 nm or less.

2. The display module according to claim 1, wherein the cover layer includes silicon dioxide.

3. The display module according to claim 1, wherein a thickness of the base portion is 100 pm or more and 300 pm or less, a thickness of the cover layer is 500 nm or more and 600 nm or less, the first depth and the second depth are each 100 nm or more and 200 nm or less.

4. The display module according to claim 1, wherein the cover layer further includes a plurality of third patterns each recessed at a third depth different from the first depth and the second depth, the third depth is 100 nm or more and 200 nm or less.

5. The display module according to claim 4, wherein a difference between a depth having a maximum value among the first depth, the second depth, and the third depth and a depth having a minimum value is 70 nm or more and 90 nm or less.

6. The display module according to claim 4, wherein the plurality of first patterns, the plurality of second patterns, and the plurality of third patterns are alternately arranged with each other.

7. The display module according to claim 1, wherein an angle formed by an inner side face of at least any one of the plurality of first patterns and the plurality of second patterns defined in the cover layer and the base portion is 60 degrees or more and 85 degrees or less.

8. A display module, wherein, including: a plurality of light emitting elements; and, a sealing member sealing the plurality of light emitting elements, the sealing member including a base portion and a cover layer, the base portion including a transparent substance, the cover layer arranged on one face of the base portion, the cover layer including: a base layer in contact with the one face of the base portion; a plurality of first patterns each protruding by a first length amount from the base layer and the plurality of first patterns each spaced apart by a first pitch; a plurality of second patterns each protruding by a second length amount from one side of a corresponding first pattern among the plurality of first patterns; and a plurality of third patterns each protruding by the second length amount from the other side of the corresponding first pattern among the plurality of first patterns, the first length being determined based on a luminance difference between a central region and a peripheral region of a pixel region corresponding to at least any one of the plurality of light emitting elements, the plurality of first patterns and the plurality of second patterns being alternately arranged with each other in one direction, The first length is 70 nm or more and 90 nm or less. The first length is 70 nm or more and 90

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