Display device and method for manufacturing a display device

Abstract

A display device and a manufacturing method of the display device are provided. The display device can include a substrate; a plurality of first electrodes disposed on the substrate; a pixel definition film disposed on the substrate and exposing a part of an upper surface of each of the plurality of first electrodes to define a plurality of open regions; a spacer disposed on the pixel definition film between two open regions adjacent to each other among the plurality of open regions; a slot passing through the spacer and at least partially overlapping an imaginary straight line connecting two points located at a shortest distance between the two open regions; a first common layer covering the plurality of first electrodes, the pixel definition film, and the spacer; a plurality of light emitting layers disposed on the first common layer of each of the plurality of open regions; and a second electrode covering the plurality of light emitting layers and the first common layer, thereby improving display performance of the display device.

Description

Technical Field

[0001] This invention relates to a display device and a method for manufacturing a display device. Background Technology

[0002] An organic light-emitting display device is a device that emits light by causing holes injected from the anode and electrons injected from the cathode to meet in a light-emitting layer. To define the light-emitting area of ​​the organic light-emitting display device, it may include a pixel-defining film. Spacers may be disposed on the pixel-defining film.

[0003] In recent years, with the increasing integration of organic light-emitting display devices, crosstalk has occurred, where holes move from the light-emitting area to other adjacent light-emitting areas. As a result, the display performance of organic light-emitting display devices may decrease. Summary of the Invention

[0004] One object of the present invention is to provide a display device with improved display performance.

[0005] Another object of the present invention is to provide a method for manufacturing a display device with improved display performance.

[0006] However, the purpose of this invention is not limited to the above-described purpose, and various extensions can be made without departing from the spirit and scope of this invention.

[0007] To achieve an objective of the present invention, an embodiment of the display device may include: a substrate; a plurality of first electrodes disposed on the substrate; a pixel defining film disposed on the substrate, exposing a portion of the upper surface of each of the plurality of first electrodes to define a plurality of opening regions; a spacer disposed on the pixel defining film between two adjacent opening regions among the plurality of opening regions; a slot penetrating the spacer and at least a portion of it overlapping with an imaginary straight line connecting two points located at the shortest distance between the two opening regions; a first common layer covering the plurality of first electrodes, the pixel defining film, and the spacer; a plurality of light-emitting layers disposed on the first common layer of each of the plurality of opening regions; and a second electrode covering the plurality of light-emitting layers and the first common layer.

[0008] In one embodiment, the spacer may surround the groove.

[0009] In one embodiment, the groove may have a rectangular shape in a plane.

[0010] In one embodiment, the groove may have a cross shape on a plane.

[0011] In one embodiment, the first common layer may extend toward the interior of the groove.

[0012] In one embodiment, the first common layer may cover the upper surface of the pixel definition film exposed through the slot.

[0013] In one embodiment, the groove may also extend through at least a portion of the pixel definition film.

[0014] In one embodiment, the display device may further include a second common layer disposed between the plurality of light-emitting layers and the second electrode, and covering the plurality of light-emitting layers and the first common layer.

[0015] In one embodiment, the second common layer may extend toward the interior of the groove.

[0016] In one embodiment, each of the light-emitting layers extends upward toward the spacer.

[0017] In one embodiment, the first electrode may be an anode, the first common layer may be a hole injection layer (HIL), and the second electrode may be a cathode.

[0018] To achieve other objectives of the present invention as described above, other embodiments of the present invention relate to a method for manufacturing a display device that may include: the steps of forming a plurality of first electrodes on a substrate; forming an organic layer covering the plurality of first electrodes on the substrate; etching the organic layer to form a pixel defining film, spacers, and trenches, wherein the pixel defining film exposes a portion of the upper surface of each of the plurality of first electrodes to define a plurality of opening regions, the spacers are disposed between two adjacent opening regions among the plurality of opening regions, and at least a portion of the trenches overlaps with and passes through the spacers on an imaginary straight line connecting two points located at the shortest distance between the two opening regions; forming a first common layer covering the plurality of first electrodes, the pixel defining film, and the spacers; forming a plurality of light-emitting layers disposed on the first common layer of each of the plurality of opening regions; and forming a second electrode covering the plurality of light-emitting layers and the first common layer.

[0019] In one embodiment, the pixel defining film, the spacer, and the groove may be integrally formed.

[0020] In one embodiment, the method of manufacturing the display device may further include the step of disposing of a first mask comprising a first semi-transparent portion, a second semi-transparent portion, a transparent portion and a light-blocking portion on the organic layer.

[0021] In one embodiment, the first semi-transparent portion may correspond to the pixel defining film, the second semi-transparent portion may correspond to the groove, the transparent portion may correspond to the plurality of opening regions, and the light-shielding portion may correspond to the spacer.

[0022] In one embodiment, the transmittance of the first semi-transparent portion of the first mask may be the same as the transmittance of the second semi-transparent portion of the first mask.

[0023] In one embodiment, the transmittance of the second semi-transparent portion of the first mask may be greater than the transmittance of the first semi-transparent portion of the first mask.

[0024] In one embodiment, the method of manufacturing the display device may further include the step of configuring a fine metal mask (FMM) on the first common layer of each of the plurality of opening regions.

[0025] In one embodiment, the fine metal mask may be in direct contact with the first common layer on the spacer.

[0026] In one embodiment, the plurality of light-emitting layers may be formed to extend from above the first common layer of each of the opening regions toward above the spacer.

[0027] (Invention Effects)

[0028] As described above, a display device according to an embodiment of the present invention may include a spacer with grooves formed therein. This provides a display device with improved display performance.

[0029] As described above, other embodiments of the present invention relate to a method for manufacturing a display device that includes spacers with grooves. This provides a method for manufacturing a display device with improved display performance.

[0030] However, the effects of the present invention are not limited to those described above, and various extensions can be made without departing from the spirit and scope of the present invention. Attached Figure Description

[0031] Figure 1 This is a plan view illustrating a display device according to an embodiment of the present invention.

[0032] Figure 2 It's enlarged. Figure 1 Plan view of area A.

[0033] Figure 3 It's enlarged. Figure 2 Plan view of area B.

[0034] Figure 4 It's enlarged. Figure 2 Plan view of area B.

[0035] Figures 5 to 8 It is along Figure 2 A sectional view taken from line II′.

[0036] Figure 9 It is along Figure 2 A sectional view taken from line II-II′.

[0037] Figures 10 to 17 This is a cross-sectional view illustrating a method for manufacturing a display device according to an embodiment of the present invention.

[0038] Symbol explanation:

[0039] 100: Display device; DP: Display area; NDP: Non-display area; OA: Opening area; SP: Spacer; H: Groove; PDL: Pixel definition film; CL1: First common layer; CL2: Second common layer; E1: First electrode; E2: Second electrode; SUB: Substrate; OL: Organic layer; M1: First mask; M2: Second mask; M3: Third mask. Detailed Implementation

[0040] Hereinafter, with reference to the accompanying drawings, a display device and a method for manufacturing the display device according to embodiments of the present invention will be described in more detail. The same or similar reference numerals are used for the same constituent elements in the drawings.

[0041] Figure 1 This is a plan view illustrating a display device according to an embodiment of the present invention.

[0042] Reference Figure 1 The display device 100 may include a display area DP and a non-display area NDP.

[0043] The display area DP can be an area in the display device 100 where an image is displayed. The display device 100 may include a plurality of pixels in the display area DP that emit light. The plurality of pixels can receive electrical signals, thereby emitting light with a brightness corresponding to the intensity of the electrical signals.

[0044] The non-display area (NDP) can be an area in the display device 100 where no image is displayed. The display device 100 may include a driving circuit in the NDP. The driving circuit may include a data driving circuit, a gate driving circuit, a timing controller, etc. The driving circuit can generate the electrical signal, thereby providing the electrical signal to the plurality of pixels.

[0045] Figure 2 It's enlarged. Figure 1 Plan view of area A. Figure 3 It's enlarged. Figure 2Plan view of area B. Figure 4 It's enlarged. Figure 2 Plan view of area B. Figure 5 It is along Figure 2 A sectional view taken from line II′.

[0046] Reference Figures 2 to 5 The display device 100 may include a substrate SUB, a plurality of first electrodes E1, a pixel definition film PDL, a spacer SP, a first common layer CL1, a plurality of light-emitting layers EL, and a second electrode E2.

[0047] The substrate SUB may include a plurality of transistors (not shown). Each of the plurality of transistors may be electrically connected to a plurality of first electrodes E1. The plurality of transistors may supply electrical signals to the plurality of first electrodes E1.

[0048] Multiple first electrodes E1 can be disposed on the substrate SUB. Each of the multiple first electrodes E1 may comprise a conductive material. For example, each of the multiple first electrodes E1 may comprise a metal. The multiple first electrodes E1 may be disposed on the substrate SUB and spaced apart from each other. Each of the multiple first electrodes E1 may be an anode. That is, the multiple first electrodes E1 may provide holes to multiple light-emitting layers EL.

[0049] A pixel definition film (PDL) can be disposed on a substrate SUB. The PDL exposes a portion of the upper surface of each of the plurality of first electrodes E1 to define a plurality of opening regions OA. In the plurality of opening regions OA, the plurality of first electrodes E1 can be in direct contact with the first common layer CL1.

[0050] Spacers SP can be configured on a pixel-defined film PDL. Furthermore, spacers SP can be configured between two adjacent opening regions within a plurality of opening regions OA. Spacers SP can define a slot H that passes through the spacers SP. Spacers SP can surround the slot H. For example, the slot H can have a closed curve shape in a planar view.

[0051] A first common layer CL1 may cover multiple first electrodes E1, a pixel definition film PDL, and spacers SP. The first common layer CL1 serves as a pathway for the movement of holes provided from the multiple first electrodes E1. Thus, the first common layer CL1 can transfer the holes to multiple light-emitting layers EL. The first common layer CL1 may be a hole injection layer (HIL). The hole injection layer may include a metal oxide with a relatively high work function. For example, the metal oxide may include tungsten oxide (WO3). x ), Vanadium oxide (VO) x ), molybdenum oxide (MoO) x ), rhodium oxide (RhO) x), Iridium oxide (IrO) x Nickel oxide (NiO) x ), cobalt oxide (CoO) x ) or combinations thereof.

[0052] Multiple light-emitting layers (ELs) can be configured on a first common layer (CL1) of each of multiple opening regions (OA). The multiple light-emitting layers (ELs) can emit light. Specifically, the first common layer (CL1) can receive the provision of holes from multiple first electrodes (E1), thereby transferring the holes to the multiple light-emitting layers (ELs). Furthermore, the multiple light-emitting layers (ELs) can receive the provision of electrons from second electrodes (E2). The holes and electrons can combine in the multiple light-emitting layers (ELs) to emit light.

[0053] Since the holes can move through the first common layer CL1, they can also move between the multiple first electrodes E1 via the first common layer CL1. This is known as crosstalk. When crosstalk occurs, the holes may not be transmitted to the multiple light-emitting layers EL, but instead only move between the multiple first electrodes E1. Therefore, since the number of holes transmitted to the multiple light-emitting layers EL is relatively reduced, the luminous efficiency of the multiple light-emitting layers EL may be relatively reduced. Consequently, the display performance of the display device 100 may decrease.

[0054] The second electrode E2 may cover multiple light-emitting layers EL and a first common layer CL1. The second electrode E2 may include a conductive material. For example, the second electrode E2 may include a metal. The second electrode E2 may be a cathode. That is, the second electrode E2 may provide electrons to the multiple light-emitting layers EL.

[0055] Refer again Figure 2 , Figure 2 A plan view showing a pixel definition film (PDL), spacers (SP) disposed on the pixel definition film (PDL), and multiple opening regions (OA) can be provided.

[0056] Multiple opening regions OA may include a first opening region OA1, a second opening region OA2, and a third opening region OA3. Light of different colors may be emitted from the first opening region OA1, the second opening region OA2, and the third opening region OA3. For example, the display device 100 may emit green light from the first opening region OA1, red light from the second opening region OA2, and blue light from the third opening region OA3. Figure 2 As shown, the first opening region OA1, the second opening region OA2, and the third opening region OA3 can be arranged regularly.

[0057] Refer again Figure 3 , Figure 3 It can be shown in magnification Figure 2 A plan view of two adjacent first opening regions OA1.

[0058] A spacer SP can be configured between two adjacent first opening regions OA1, and the slot H defined by the spacer SP can be configured to at least partially overlap with an imaginary straight line II′ connecting two points B1 and B6 located at the shortest distance between the two adjacent first opening regions OA1. For example, the shortest distance between the two adjacent first opening regions OA1 can be represented by a line segment connecting points B1 and B6. In this case, the slot H can overlap with a line segment connecting points B2 and B5. Thus, the distance that allows the hole to move can be increased between two adjacent first electrodes E1.

[0059] For example, in the absence of slot H, the hole can move along the line segment connecting point B1 and point B6. In this case, crosstalk may occur.

[0060] In the presence of slot H, the hole can move by meandering through slot H between two adjacent first electrodes E1. For example, when there is a slot H with a rectangular shape on the plane, the hole can move along the line that connects points B1, B2, B3, B4, B5, and B6 in sequence.

[0061] The distance the hole travels in the presence of slot H is longer than the distance it travels in the absence of slot H by an amount equivalent to the sum of the lengths of the line segments connecting points B2 and B3 and the line segments connecting points B4 and B5. Therefore, when slot H is present, crosstalk does not occur between two adjacent first electrodes E1.

[0062] Refer again Figure 4 , Figure 4 Can be enlarged for display Figure 2 A plan view of two adjacent first opening regions OA1. Figure 4 Besides the shape on the plane of groove H, it can be compared with Figure 3 They are essentially the same.

[0063] The groove H can be cross-shaped on a plane. In this case, the cavity can move along the line segment that sequentially connects points B1, B2, B3, B4, B5, B6, B7, B8, B9, and B10.

[0064] The distance the cavity moves when slot H is present is longer than the distance the cavity moves when slot H is absent by an amount equivalent to the sum of the lengths of the line segments connecting points B2 and B3, B4 and B5, B6 and B7, and B8 and B9.

[0065] exist Figure 3 and Figure 4 The illustration shows embodiments of the groove H having a rectangular shape in a plane and embodiments of the groove H having a cross shape in a plane, but the shape of the groove H is not limited to these. The groove H can include all shapes that can increase the distance between two adjacent first electrodes E1 that causes the hole to move. For example, the groove H can have a circular shape in a plane.

[0066] The shape of the adjustable groove H can be used to increase the travel distance of the cavity. For example, as... Figure 3 As shown, when the groove H has a rectangular shape on the plane, the movement distance of the cavity can be increased by lengthening the line segment connecting points B2 and B3. In other words, the movement distance of the cavity can be increased by lengthening the length of any side of the rectangular shape.

[0067] For example, such as Figure 4 As shown, when the groove H has a cross shape on the plane, the movement distance of the cavity can be increased by lengthening the line segment connecting points B2 and B3. Alternatively, the movement distance of the cavity can be increased by lengthening the line segment connecting points B4 and B5.

[0068] Refer again Figure 3 and Figure 5 The first common layer CL1 can extend toward the interior of the slot H. Furthermore, the first common layer CL1 can cover the upper surface of the pixel definition film PDL exposed through the slot H. In other words, the first common layer CL1 can cover the interior of the slot H.

[0069] Specifically, when the size of the slot H is relatively large (e.g., in...), Figure 3 In the case where the lengths of the line segments connecting points B2 and B3 and the line segments connecting points B3 and B4 are relatively long, the first common layer CL1 can be formed as the interior of the covering groove H during the formation process of the first common layer CL1.

[0070] Figure 6 It is along Figure 2 A sectional view taken along line II′. Further explanation is omitted below.

[0071] Reference Figure 3 and Figure 6The first common layer CL1 can extend toward the interior of the groove H. Furthermore, a portion of the upper surface of the pixel definition film PDL exposed through the groove H can be exposed.

[0072] Specifically, when the size of the slot H is relatively small (e.g., in...), Figure 3 In the case where the lengths of the line segments connecting points B2 and B3, and the lengths of the line segments connecting points B3 and B4 are relatively short, the first common layer CL1 may not be formed on the upper surface of the pixel definition film PDL exposed through the groove H during the formation process. Therefore, the two first electrodes E1 that are adjacent to each other in the cross-sectional view may not be connected due to the first common layer CL1.

[0073] Figure 7 It is along Figure 2 A sectional view taken along line II′. Further explanation is omitted below.

[0074] Reference Figure 3 and Figure 7 The groove H may penetrate at least a portion of the pixel definition film (PDL). Furthermore, the first common layer CL1 may extend toward the interior of the groove H and may cover the upper surface of the pixel definition film (PDL) exposed through the groove H.

[0075] When the groove H penetrates at least a portion of the pixel-defining film PDL, the depth of the groove H can be relatively increased. Consequently, the length of the first common layer CL1 connecting two adjacent first electrodes E1 in a cross-sectional view can be relatively increased.

[0076] Figure 8 It is along Figure 2 A sectional view taken along line II′. Repeated descriptions are omitted below.

[0077] Reference Figure 3 and Figure 8 A second common layer CL2 can be disposed between the multiple light-emitting layers EL and the second electrode E2. The second common layer CL2 can cover the multiple light-emitting layers EL and the first common layer CL1. In addition, the second common layer CL2 can extend toward the interior of the trench H.

[0078] The second common layer CL2 can be an electron transfer layer (ETL). The electron transfer layer can receive an electron supply from the second electrode E2, thereby transferring the electrons to the light-emitting layer EL.

[0079] Figure 9 It is along Figure 2 A sectional view taken along line II-II′. Repeated descriptions are omitted below.

[0080] Reference Figure 9The first region A1 can be a region in which a spacer SP is disposed between two adjacent first electrodes E11 and E12, and the second region A2 can be a region in which no spacer SP is disposed between two adjacent first electrodes E12 and E13.

[0081] In the first region A1, two light-emitting layers EL1 and EL2, respectively disposed on two adjacent first electrodes E11 and E12, can extend upward toward the spacer SP. In this case, in the first region A1, the two light-emitting layers EL1 and EL2 may not be in contact with each other.

[0082] In the first region A1, since the display device 100 includes a slot H, crosstalk does not occur between two adjacent first electrodes E11 and E12.

[0083] In the second region A2, two light-emitting layers EL2 and EL3, respectively disposed on two adjacent first electrodes E12 and E13, may extend upward toward the pixel definition film PDL. In other words, in the second region A2, a light-emitting layer (e.g., EL2 or EL3) may exist between the first common layer CL1 and the second electrode E2.

[0084] In one embodiment, in the second region A2, the two light-emitting layers EL2 and EL3 can be in contact with each other and cover the pixel definition film PDL. In this case, in the second region A2, holes existing in the first common layer CL1 above the pixel definition film PDL and electrons provided from the second electrode E2 above the pixel definition film PDL can meet in the light-emitting layer EL2 or the light-emitting layer EL3 above the pixel definition film PDL and emit light. That is, in the second region A2, crosstalk, which would occur when the holes move between the two adjacent first electrodes E12 and E13 through the first common layer CL1, can be avoided.

[0085] Figures 10 to 17 This is a cross-sectional view illustrating a method for manufacturing a display device according to an embodiment of the present invention. For example, Figures 10 to 17 It can be shown that manufacturing is possible. Figure 5 A cross-sectional view of the method of displaying the device.

[0086] Reference Figure 10 A plurality of first electrodes E1 can be formed on the substrate SUB. The substrate SUB can be formed to include a plurality of transistors (not shown). The plurality of first electrodes E1 can be formed to be electrically connected to the plurality of transistors.

[0087] Reference Figure 11 An organic layer OL covering multiple first electrodes E1 can be formed on the substrate SUB. In this case, the upper surface of the organic layer OL can have a flat surface.

[0088] Reference Figure 12 The organic layer OL can be etched. In one embodiment, the organic layer OL can be etched by irradiating a laser L using a first mask M1.

[0089] The first mask M1 may include a first semi-transparent portion P1, a second semi-transparent portion P2, a transparent portion P3, and a light-blocking portion P4.

[0090] The first semi-transparent portion P1 and the second semi-transparent portion P2 allow only a portion of the irradiated laser L to pass through. Therefore, only a portion of the laser L irradiating the first semi-transparent portion P1 and the second semi-transparent portion P2 of the first mask M1 can irradiate the organic layer OL. The first semi-transparent portion P1 can correspond to the pixel defining film PDL, and the second semi-transparent portion P2 can correspond to the groove H.

[0091] The transmitting part P3 allows all the irradiated laser L to pass through. The blocking part P4 prevents all the irradiated laser L from passing through. The transmitting part P3 can correspond to multiple first opening regions OA1, and the blocking part P4 can correspond to the spacer SP.

[0092] Reference Figure 13 The organic layer OL can be etched to form the pixel definition film PDL, spacers SP, and grooves H.

[0093] The pixel definition film (PDL) can be formed such that a portion of the upper surface of each of the plurality of first electrodes E1 is exposed to define a plurality of first opening regions OA1. The plurality of first opening regions OA1 can be formed in the organic layer OL at the junction with the permeable portion (…). Figure 12 The overlapping part of P3).

[0094] The spacer SP can be disposed between two adjacent first opening regions among a plurality of first opening regions OA1. The spacer SP can be formed in the organic layer OL in relation to the light-shielding portion ( Figure 12 The overlapping part of P4).

[0095] The groove H can be formed such that at least a portion overlaps with an imaginary straight line connecting two points located at the shortest distance between the two adjacent first opening regions. The groove H can penetrate the spacer SP. The groove H can be formed in the organic layer OL and the second semi-permeable portion ( Figure 12 The overlapping part of P2).

[0096] Refer again Figure 12 and Figure 13 The pixel definition film (PDL), spacers (SP), and grooves (H) can be formed as a single unit. For example, the pixel definition film (PDL), spacers (SP), and grooves (H) can be formed by etching an organic layer (e.g., OL) using only one mask (e.g., M1).

[0097] In one embodiment, the transmittance of the first semi-transparent portion P1 may be approximately half the transmittance of the transparent portion P3. Therefore, the height of the spacer SP and the height of the pixel defining film PDL may be substantially the same.

[0098] In one embodiment, the depth HL of the groove H can be adjusted by adjusting the transmittance of the second semi-transparent portion P2. For example, when the transmittance of the second semi-transparent portion P2 is the same as the transmittance of the first semi-transparent portion P1, a groove H can be formed that penetrates the spacer SP to expose the upper surface of the pixel definition film PDL. For example, when the transmittance of the second semi-transparent portion P2 is greater than the transmittance of the first semi-transparent portion P1, a groove H can be formed that penetrates the spacer SP and also penetrates at least a portion of the pixel definition film PDL.

[0099] Reference Figure 14 A first common layer CL1 can be formed. The first common layer CL1 can be formed to cover multiple first electrodes E1, pixel definition film PDL and spacers SP.

[0100] In one embodiment, the first common layer CL1 may be formed to extend toward the interior of the groove H and cover the upper surface of the pixel definition film PDL exposed through the groove H.

[0101] Reference Figure 15 and Figure 16 Multiple light-emitting layers (ELs) can be formed. Each of the multiple ELs can be formed on a first common layer CL1 and configured with multiple opening regions (...). Figure 13 The OA1 overlaps.

[0102] Multiple light-emitting layers (ELs) can be formed using different masks. For example, multiple light-emitting layers (ELs) can be formed using a second mask M2 and a third mask M3, respectively. In this case, the second mask M2 and the third mask M3 can be fine metal masks (FMMs).

[0103] The process of forming multiple light-emitting layers (ELs) using a second mask M2 and a third mask M3 may include configuring the second mask M2 and the third mask M3 on a first common layer CL1 to be aligned with multiple opening regions (ELs). Figure 13 The steps of overlapping OA1). In this case, the second mask M2 and the third mask M3 can be in direct contact with the first common layer CL1 on the spacer SP. Since the spacer SP is formed on the pixel definition film PDL, the second mask M2 and the third mask M3 may not be in direct contact with the first common layer CL1 on the pixel definition film PDL.

[0104] The size of the openings in the second mask M2 and the third mask M3 can be larger than the size of multiple opening regions. Figure 13The size of each of the OA1). Thus, multiple emitting layers EL can be formed from multiple opening regions (OA1). Figure 13 The OA1) extends above the first common layer CL1 of each of them toward the spacer SP.

[0105] Reference Figure 17 A second electrode E2 can be formed. The second electrode E2 can be formed to cover multiple light-emitting layers EL and a first common layer CL1.

[0106] As described above, the invention has been illustrated with reference to exemplary embodiments. However, those skilled in the art should understand that various modifications and alterations can be made to the invention without departing from the spirit and scope of the invention as set forth in the claims.

[0107] (Industry availability)

[0108] This invention can be applied to display devices. For example, it can be applied to high-resolution smartphones, mobile phones, smart tablets, smartwatches, tablet PCs, vehicle navigation systems, televisions, computer displays, etc.

Claims

1. A display device, comprising: substrate; Multiple first electrodes are disposed on the substrate; A pixel definition film is disposed on the substrate, and exposes a portion of the upper surface of each of the plurality of first electrodes to define a plurality of opening regions; A spacer is disposed on the pixel-defining film between two adjacent opening regions among the plurality of opening regions; A groove, penetrating the spacer, and at least a portion of which overlaps with an imaginary straight line connecting two points at the shortest distance on a plan view between the two opening regions; A first common layer covers the plurality of first electrodes, the pixel definition film, and the spacer; Multiple light-emitting layers are configured on the first common layer to overlap with the multiple opening regions, respectively; as well as The second electrode covers the plurality of light-emitting layers and the first common layer. The spacer surrounds the groove in a closed curve shape. The two points having the shortest distance are two opposite vertices of the two opening regions, and the spacer is disposed between the two vertices. The first common layer extends continuously from the opening area through the spacer into the interior of the slot.

2. The display device according to claim 1, characterized in that, The groove has a rectangular or cross shape on a plane.

3. The display device according to claim 1, characterized in that, The first common layer covers the upper surface of the pixel definition film exposed through the slot.

4. The display device according to claim 1, characterized in that, The groove also extends through at least a portion of the pixel definition film.

5. The display device according to claim 1, characterized in that, Also includes: A second common layer is disposed between the plurality of light-emitting layers and the second electrode, and covers the plurality of light-emitting layers and the first common layer.

6. The display device according to claim 5, characterized in that, The second common layer extends toward the interior of the groove.

7. A method for manufacturing a display device, comprising: The step of forming multiple first electrodes on a substrate; The step of forming an organic layer covering the plurality of first electrodes on the substrate; The step of etching the organic layer to form a pixel defining film, spacers, and trenches, wherein the pixel defining film exposes a portion of the upper surface of each of the plurality of first electrodes to define a plurality of opening regions, the spacers are disposed between two adjacent opening regions among the plurality of opening regions, and at least a portion of the trenches overlaps with and passes through the spacers by an imaginary straight line connecting two points at the shortest distance on a plan view between the two opening regions. The step of forming a first common layer covering the plurality of first electrodes, the pixel definition film and the spacers; The steps of forming a plurality of light-emitting layers on the first common layer, configured to overlap with the plurality of opening regions respectively; and The step of forming a second electrode covering the plurality of light-emitting layers and the first common layer, The spacer surrounds the groove in a closed curve shape. The two points having the shortest distance are two opposite vertices of the two opening regions, and the spacer is disposed between the two vertices. The second electrode extends continuously from above the first common layer of the opening region through the spacer into the interior of the groove.

8. The method for manufacturing a display device according to claim 7, characterized in that, The pixel defining film, the spacer, and the groove are formed as a single unit.

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