KR20150124360A - Organic light emitting diode display - Google Patents

Abstract

An organic light emitting diode display according to the present invention comprises: a first substrate; multiple electrodes which are positioned on the first substrate; a pixel definition layer which includes multiple opening portions separated from each other and exposing the electrodes, respectively; and a spacer which is positioned on the pixel definition layer. The pixel definition layer includes, for each pixel, a first opening portion and a second opening portion which are adjacent along a first direction at a distance, and a third opening portion which is adjacent to the first opening portion and the second opening portion along a second direction intersecting with the first direction at a distance, and the spacer can be positioned at an intersection point between a first imaginary line extending in the first direction and passing between the first opening portion and the third opening portion, and a second imaginary line extending in the second direction and passing between the first opening portion and the second opening portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light emitting display, and more particularly, to an organic light emitting display in which pixels are defined by a pixel defining layer.

An organic light emitting diode (OLED) display includes two electrodes and an organic light emitting layer disposed therebetween, and holes injected from an anode, which is one electrode and one electrode, injected from a cathode, To form an exciton, and the exciton is a display device emitting light while emitting energy.

The organic light emitting display has self-emission characteristics, and unlike a liquid crystal display, a separate light source is not required, so that the thickness and weight can be reduced. Further, organic light emitting display devices are attracting attention as display devices that exhibit high-quality characteristics such as low power consumption, high luminance, and high response speed.

A conventional organic light emitting display includes a first substrate, a pixel circuit including a thin film transistor, a first electrode connected to the pixel circuit, a pixel defining layer having a plurality of openings exposing the first electrode, As shown in FIG. The organic light emitting layer is disposed on the first electrode corresponding to the opening, the second electrode is disposed on the organic light emitting layer, and the second substrate is disposed on the second electrode.

The spacer is located in a space between the plurality of openings defined by the pixel defining layer and can perform the function of supporting the deposition mask in the organic material deposition process using the deposition mask. At this time, the edge of the opening of the deposition mask contacts the upper center portion of the spacer, and foreign matter may accumulate. As the deposition process continues, the foreign objects accumulate and increase in size, and the foreign objects that are enlarged in this way are caused to be shot inside the pixels, which may lead to pixel defects.

According to the technical background as described above, the present invention provides a spacer capable of minimizing or preventing the accumulation of foreign matter caused by the edge of the opening of the deposition mask even if the deposition process is carried out while supporting the deposition mask by the spacer in the organic material deposition process. And an organic light emitting display device.

Another object of the present invention is to provide an organic light emitting diode display capable of preventing the accumulation of impurities caused by the accumulation of impurities by minimizing or preventing the accumulation of impurities caused by the edge of the opening of the deposition mask during the organic material deposition process.

An organic light emitting display according to an embodiment of the present invention includes a first substrate, a plurality of electrodes disposed on the first substrate, a plurality of electrodes disposed on the plurality of electrodes, A pixel defining layer including a plurality of openings, and a spacer located on the pixel defining layer. Wherein the pixel defining layer has a first opening and a second opening adjacent to each other in the first direction with an interval therebetween and a second direction intersecting the first direction with an interval from the first opening and the second opening, Wherein the spacer includes a first imaginary line extending in the first direction and passing between the first and third openings, and a second imaginary line extending in the second direction, the first imaginary line extending in the second direction, And may be located at the intersection of the second imaginary line passing between the second openings.

A first organic emission layer on which a first organic emission material is deposited is formed on a first opening of the pixel defining layer, a second organic emission layer on which a second organic emission material is deposited is formed on a second opening of the pixel defining layer, And a third organic emission layer on which the third organic emission material is deposited may be formed in the third opening of the pixel defining layer.

At least one of the first organic luminescent material, the second organic luminescent material and the third organic luminescent material may be located on the pixel defining layer or the spacer.

Wherein the first virtual line passes between the first opening and the third opening belonging to the one pixel and the second virtual line belongs to each pixel neighboring to the first direction, And the spacer may include a first spacer located at an intersection of the first imaginary line and the second imaginary line.

Further comprising a third imaginary line extending in the first direction and each belonging to a pixel neighboring in the second direction and passing between neighboring first and third openings, And a second spacer located at an intersection of the third imaginary line.

The first spacer and the second spacer may be alternately arranged along the first direction for every pixel.

The first spacer and the second spacer may be arranged for each pixel along the second direction.

The first spacer and the second spacer may be formed to be opposite to each other with the third opening interposed therebetween and protrude in opposite directions.

The spacer may have a triangular planar shape.

The spacer may have a first side extending in the first direction, and a first vertex opposite to the first side may protrude toward a region between the first opening and the second opening.

The spacer may have a polygonal planar shape having a first side extending in the first direction and a protruding portion facing the first side and projecting toward an area between the first opening and the second opening .

The spacer may have a protrusion protruding toward the region between the first opening and the second opening and toward the region between the first opening or between the second opening and the third opening.

Wherein the first virtual line passes between the first opening and the third opening belonging to the one pixel and extends in the second direction and extends between the first opening and the second opening belonging to the one pixel, And a virtual line, and the spacer may be located at an intersection of the first virtual line and the fourth virtual line.

The spacers may be disposed one by one along the first direction.

The spacers may be disposed one by one along the second direction.

The spacer may be formed such that the thickness on the plane of the planar central portion is thicker than the thickness of the planar edge of the planar edge.

According to another aspect of the present invention, there is provided a method of manufacturing an organic light emitting diode display, comprising: forming a plurality of electrodes on a first substrate; forming a pixel defining layer on the first substrate to cover the plurality of electrodes; Forming a plurality of openings in the pixel defining layer so as to correspond to the plurality of electrodes to expose the plurality of electrodes; forming spacers on the pixel defining layer; Depositing a deposition mask having a mask opening on the spacer, and depositing an organic luminescent material through the mask opening.

In this case, the pixel defining layer may include a first opening and a second opening adjacent to each other in the first direction with an interval therebetween, and a second opening and a second opening intersecting the first direction with an interval from the first opening and the second opening, Wherein the spacer includes a first imaginary line extending in the first direction and passing between the first and third openings and a second imaginary line extending in the second direction, 1 is located at the intersection of the second virtual line passing through the first opening and the second opening, and the edge of the mask opening can be seated away from the uppermost end of the spacer.

The edge of the mask opening may have a curved edge.

The deposition of the organic luminescent material may include depositing a first organic luminescent material on the first opening of the pixel defining layer to form a first organic luminescent layer and forming a second organic luminescent material on the second opening of the pixel defining layer Forming a second organic emission layer by depositing a third organic emission layer on the third opening of the pixel defining layer, and depositing a third organic emission layer on the third opening of the pixel defining layer.

According to the above-described organic light emitting diode display, foreign matter accumulation that may occur due to the edge of the opening of the deposition mask can be minimized or prevented even if the deposition process is performed while supporting the deposition mask by the spacer in the organic material deposition process.

In addition, it is possible to minimize or prevent the accumulation of foreign matter that may occur at the edge of the opening of the deposition mask in the course of the organic material deposition process, thereby preventing the poor image formation due to the foreign material accumulation.

1 is a plan view showing a part of a display region of an OLED display according to a first embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a plan view showing a state in which a part of a display region of the organic light emitting diode display shown in FIG. 1 is covered with a deposition mask.
4 is a cross-sectional view taken along line IV-IV in Fig.
FIGS. 5 and 6 are arrangement views showing deposition masks for depositing organic materials on pixels different from the deposition masks shown in FIG. 3 in the process of manufacturing the organic light emitting display shown in FIG.
7 is a plan view showing a result of depositing an organic luminescent material sequentially using a deposition mask in order to manufacture the organic light emitting diode display shown in Fig.
8 is a plan view showing a part of a display region of an OLED display according to a modification of the first embodiment of the present invention.
9 is a plan view showing a part of a display region of an OLED display according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. In addition, since the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown in the drawings.

The term "on " in the present invention means to be located above or below the object member, and does not necessarily mean that the object is located on the upper side with respect to the gravitational direction. Also, throughout the specification, when an element is referred to as "including" an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

Hereinafter, an OLED display according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

FIG. 1 is a plan view showing a part of a display region of an OLED display according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. In FIG. 1, the first electrode, the pixel defining layer, the organic light emitting layer, and the spacer are mainly shown for the sake of convenience, and illustration of a part of the structure not related to the description is omitted. In FIG. 2, the first substrate, Electrodes, and a common layer are shown together.

1 and 2, an OLED display 100 according to a first exemplary embodiment of the present invention includes a first substrate SU1, a circuit unit PC, a first electrode E1, A first electrode layer E2, a third electrode E3, a pixel defining layer PDL, spacers SPC1 and SPC2, a first common layer CL1, a first organic emission layer OL1, a second organic emission layer OL2, 3 organic light emitting layer OL3, a second common layer CL2, a common electrode CE, and a second substrate SU2.

The first substrate SU1 is formed of an insulating substrate, and may be formed of a material selected from, for example, glass, quartz, ceramic, metal, and plastic. Also, the first substrate SU1 may be made of a flexible substrate such as plastic. In this case, the OLED display 100 may have a bending property.

The circuit portion PC is disposed on the first substrate SU1 and includes wiring including one or more scan lines, data lines, driving power supply lines, common power supply lines, and the like, A pixel circuit such as two or more thin film transistors (TFT) and one or more capacitors, and the like. The circuit portion PC may be formed to have various known structures. Here, the pixel PX means a minimum unit for displaying an image, and may include a plurality of sub-pixels for displaying individual colors.

A plurality of first electrodes E1 and second electrodes E2 are alternately arranged in a first direction (y-axis direction in the drawing), and a third electrode E3 is arranged alternately in the first direction Are arranged adjacent to the first electrode (E1) and the second electrode (E2) in a second direction (x-axis direction in the drawing) intersecting the first direction, and are arranged in parallel along the first direction. Accordingly, a plurality of second sub-pixel columns including the first sub-pixel line including the first electrode E1 and the second electrode E2 and the third electrode E3 are alternately arranged in the second direction.

Each of the first electrode E1, the second electrode E2 and the third electrode E3 may be either an anode electrode functioning as a hole injection electrode or a cathode electrode functioning as an electron injection electrode. The first electrode E1, the second electrode E2, and the third electrode E3 may be formed of a light transmitting electrode, a light semi-transmissive electrode, or a light reflecting electrode.

The pixel defining layer PDL is located on the first electrode E1, the second electrode E2 and the third electrode E3 and includes a first electrode E1, a second electrode E2, E3). The pixel defining layer PDL includes a first opening OM1 for exposing a portion of each of the first electrode E1, the second electrode E2 and the third electrode E3 for each pixel PX, An opening OM2 and a third opening OM3.

The first opening OM1 opens a part of the first electrode E1 and has a substantially rectangular shape. The first opening OM1 is spaced apart from the third opening OM3 and the second opening OM2 and has a smaller area than the third opening OM3. The first opening OM1 has a rectangular shape, but is not limited thereto, and may have a polygonal shape such as a triangle, a rectangle, a pentagon, a hexagon, a hexagon, an octagon, or the like. A plurality of first openings OM1 correspond to the plurality of first electrodes E1 and each of the plurality of first openings OM1 opens a part of each of the plurality of first electrodes E1. A first organic emission layer OL1 for emitting red light is disposed on the first electrode E1 exposed by the first opening OM1. On the other hand, an organic light emitting layer emitting light of various colors such as blue, green, or white may be selectively disposed on the first electrode E1 opened by the first opening OM1.

Here, the organic light emitting layer is formed in a region where the organic light emitting material is substantially deposited through the opening of the mask, and when voltage or current is applied to the electrode corresponding to the organic light emitting layer, the organic light emitting layer emits light of a predetermined color. However, since the organic luminescent material is deposited through the openings of the mask and deposited in the regions corresponding to the openings of the mask, the organic luminescent material may be deposited in a wider area than the openings of the pixel defining layer, Can also be placed on the spacer. However, in the drawings and detailed description for explaining the present embodiment, an organic luminescent material is deposited, and an area in which the luminescence of the organic luminescent material is scheduled according to the application of a voltage or an electric current is defined as an organic luminescent layer.

The second opening OM2 opens a part of the second electrode E2 and has a substantially rectangular shape. The second opening OM2 is spaced apart from the third opening OM3 and the first opening OM1 and has a smaller area than the third opening OM3. The second opening OM2 has a rectangular shape, but is not limited thereto and may have a polygonal shape such as a triangle, a rectangle, a pentagon, a hexagon, a hexagon, an octagon, or the like. A plurality of second openings OM2 correspond to the plurality of second electrodes E2, and each of the plurality of second openings OM2 opens a part of each of the plurality of second electrodes E2. And a second organic emission layer OL2 emitting green light is disposed on the second electrode E2 exposed by the second opening OM2. On the other hand, an organic light emitting layer that emits light of various colors such as blue, red, or white may be selectively disposed on the second electrode E2 opened by the second opening OM2.

The third opening OM3 opens a part of the third electrode E3 and has a substantially rectangular shape having a pair of opposed long sides and a pair of short sides. The third opening OM3 is spaced apart from the first opening OM1 and the second opening OM2 and has a larger area than the first opening OM1 and the second opening OM2. The third opening OM3 has a rectangular shape, but is not limited thereto and may have a polygonal shape such as a triangle, a rectangle, a pentagon, a hexagon, a hexagon, an octagon, or the like. A plurality of third openings OM3 correspond to the plurality of third electrodes E3. Each of the plurality of third openings OM3 opens a part of each of the plurality of third electrodes E3. A third organic light emitting layer OL3 for emitting blue light is disposed on the third electrode E3 exposed by the third opening OM3. On the other hand, an organic light emitting layer that emits light of various colors such as green, red, or white may be selectively disposed on the third electrode E3 opened by the third opening OM3.

The first opening OM1, the second opening OM2 and the third opening OM3 are spaced apart from each other and the short sides of the first opening OM1 and the second opening OM2 are separated from the third opening OM3 ).

On the other hand, in FIG. 1, the first opening OM1 (or the second opening OM2) and the third opening OM3 belonging to the same pixel PX in the plan view pass through the third opening OM3, The first virtual line VL1 extending in the first direction and the first opening OM1 and the second opening OM2 of the pixel PX adjacent to each other in the first direction, The second virtual line VL2 and the first opening OM1 (or the second opening OM2), which are imaginary straight lines extending in the x-axis direction of the first opening 11a, A third imaginary line VL3, which is a virtual straight line extending in the first direction passing between the first virtual line OM3 and the second virtual line OM3.

In the present embodiment, the spacers SPC1 and SPC2 include a first spacer SPC1 positioned at the intersection of the first imaginary line VL1 and the second imaginary line VL2 in a plan view, a third imaginary line VL3, And a second spacer SPC2 located at the intersection of the second imaginary line VL2.

The spacers SPC1 and SPC2 are located across the boundaries of the plurality of pixels arranged in the first direction and alternately arranged for each pixel. That is, the first spacer SPC1 is arranged on the first imaginary line VL1 every two pixels along the first direction, and the second spacer SPC2 is arranged on the third imaginary line VL3 in the first direction VL2, And the first spacers SPC1 are alternately arranged for every pixel.

In the present embodiment, the planar shape of the spacers SPC1 and SPC2 is formed in a triangular shape. The first sides of the triangular spacers SPC1 and SPC2 extend in the first direction, and the long sides of the third opening OM3 And a first vertex opposed to the first side is protruded toward an area between the first opening OM1 and the second opening OM2. At this time, the first spacer SPC1 and the second spacer SPC2 are formed to be equal to each other with the third opening OM3 interposed therebetween, and the first vertex of the first spacer SPC1 and the second spacer SPC2 are protruded so as to face each other in opposite directions.

As shown in FIG. 2, the spacers SPC1 and SPC2 are located on the upper side of the pixel defining layer (PDL) in a sectional view, and the thickness of the planar central portion may be thicker than the thickness of the edge , Which can be controlled according to process conditions. In other words, the cross-sectional shape of the spacers SPC1 and SPC2 becomes lower at the edges on the plane and becomes higher toward the center. Here, 'planar shape' refers to a shape that is observed when viewed from a direction perpendicular to a substrate surface of the first substrate SU1, and 'sectional shape' refers to a shape that is formed by cutting a plane perpendicular to the substrate surface .

The spacers SPC1 and SPC2 may be integrally formed with the pixel defining layer (PDL), or formed of different materials. The spacers SPC1 and SPC2 may not be bounded when the pixel defining layers PDL are integrally formed of the same kind of material.

The first common layer CL1 is located on the first electrode E1, the second electrode E2, the third electrode E3, the pixel defining layer PDL and the spacers SPC1 and SPC2, , A hole transporting layer, an electron injecting layer, and an electron transporting layer.

The first organic emission layer OL1 is located on the first common layer CL1 located on the first electrode E1 corresponding to the first opening OM1. The first organic emission layer OL1 includes an organic material that emits red light and emits red light when an electrical signal is applied. As another example, the first organic light emitting layer OL1 may include an organic light emitting material that emits light of green, blue, or white, and emits green, blue, or white light.

The second organic emission layer OL2 is located on the first common layer CL1 located on the second electrode E2 corresponding to the second opening OM2. The second organic emission layer OL2 includes an organic material that emits green light and emits green light when an electrical signal is applied. As another example, the second organic emission layer OL2 may include an organic material that emits light of red, blue, or white, and emits red, blue, or white light.

The third organic light emitting layer OL3 is located on the first common layer CL1 located on the third electrode E3 corresponding to the third opening OM1. The third organic light emitting layer OL3 includes an organic material that emits blue light, and can emit blue light when an electrical signal is applied. In another example, the third organic emission layer OL3 may include an organic material emitting light of red, green, or white, and emits red, green, or white light in this case.

That is, the first organic light emitting layer OL1, the second organic light emitting layer OL2, and the third organic light emitting layer OL3 emit light of different colors. For example, the third organic light emitting layer OL3 emits blue light, and one of the first organic light emitting layer OL1 and the second organic light emitting layer OL2 emits red light, .

The second common layer CL2 is formed on the first organic light emitting layer OL1, the second organic light emitting layer OL2, the third organic light emitting layer OL3, the pixel defining layer PDL and the spacers SPC1 and SPC2. 1 common layer CL1 and may include at least one layer selected from a hole injecting layer, a hole transporting layer, an electron injecting layer, and an electron transporting layer.

The common electrode CE is disposed on the second common layer CL2 over the entire surface of the first substrate SU1 and may be either a cathode electrode functioning as an electron injection electrode or an anode functioning as a hole injection electrode. Electrode. The common electrode CE may be formed of a light-transmitting electrode or a light-reflecting electrode.

The second substrate SU2 is formed of an insulating substrate. In this embodiment, the second substrate SU2 may be a thin film encapsulating layer in which a plurality of organic films and inorganic films are alternately stacked. In addition, the second substrate SU2 may be made of a flexible substrate such as plastic together with the first substrate SU1. In this case, the OLED display 100 may have a bending property .

Although not shown in FIG. 2, functional layers such as a capping layer (CPL) and lithium fluoride (LiF) may be added between the common electrode CE and the second substrate SU2.

FIG. 3 is a plan view showing a state in which a part of a display region of the organic light emitting display shown in FIG. 1 is covered with a deposition mask, and FIG. 4 is a sectional view taken along the line IV-IV in FIG.

Referring to FIG. 3, a first deposition mask M1 may be covered to deposit the first organic light emitting material in the first opening OM1. At this time, in the first deposition mask M1, a mask opening OP1 is formed only in a portion corresponding to the first opening OM1, and the edge of the mask opening OP1 has a curved edge.

3, when the spacers SPC1 and SPC2 of the OLED display 100 according to the present embodiment are formed, a first deposition mask M1 is formed on the spacers SPC1 and SPC2 in the organic material deposition process, The edges of the openings OP1 of the first deposition mask M1 do not come into contact with the uppermost ends of the centers T of the spacers SPC1 and SPC2 even if they are supported by the springs SPC1 and SPC2. Accordingly, it is possible to minimize or prevent foreign matter accumulation that may occur due to the edge of the opening OP1 of the first deposition mask M1 during the deposition process, and to prevent the defect from being caused by foreign matter accumulation.

FIG. 5 and FIG. 6 are arrangement views showing deposition masks for depositing organic substances in sub-pixels different from the deposition masks shown in FIG. 3 in the process of manufacturing the organic light emitting display shown in FIG.

5 illustrates a state in which the second deposition mask M2 is covered to deposit a second organic luminescent material in the second opening OM2. FIG. 6 illustrates a state in which the third organic luminescent material M2 is deposited in the third opening OM3. The third deposition mask M3 is covered. At this time, in the second deposition mask M2, a mask opening OP2 is formed only in a portion corresponding to the second opening OM2, and the edge of the mask opening OP2 has a curved edge. On the other hand, in the third deposition mask M3, mask openings OP3 extending in the first direction including portions corresponding to the third openings OM3 are formed. However, it is also possible that the mask opening OP3 is formed only in the portion corresponding to each third opening OM3.

5 and 6, it can be seen that each of the deposition masks is supported by the spacers SPC1 and SPC2. At this time, the edges of the openings OP2 and OP3 of each deposition mask are separated from each other by the spacers SPC1, and SPC2), which are located outside the center (T). Accordingly, it is possible to minimize or prevent foreign matter accumulation that may occur due to the edges of the openings of the deposition masks M1, M2, and M3 during the deposition process, and to prevent sticking defects due to foreign matter accumulation.

7 is a plan view showing a result of depositing an organic luminescent material sequentially using a deposition mask in order to manufacture the organic light emitting diode display shown in Fig.

Referring to FIG. 7, a first organic light emitting material layer OD1 deposited using a first deposition mask M1, a second organic light emitting material layer OD2 deposited using a second deposition mask M2, It can be confirmed that the third organic light emitting material layer (OD3) deposited using the third deposition mask (M3) is formed. The respective organic light emitting material layers OD1, OD2 and OD3 are formed substantially larger than the respective openings OM1, OM2 and OM3 of the pixel defining layer PDL, They may be formed so as to be adjacent to each other or partially overlap each other. Accordingly, the organic light emitting material layer on which the organic light emitting material is deposited may be located on the pixel defining layer or the spacer.

8 is a plan view showing a part of a display region of an OLED display according to a modification of the first embodiment of the present invention. In FIG. 8, the pixel defining layer, the organic light emitting layer, and the spacer are shown for convenience, and the deposition mask M1 is shown together.

The first opening OM1, the second opening OM2, and the third opening OM3 are formed in the pixel defining layer PDL of the OLED display 150 according to the present modification. The first opening OM1, the second opening OM2 and the third opening OM3 are spaced apart from each other and the short sides of the first opening OM1 and the second opening OM2 are separated from the third opening OM3 ).

Referring to FIG. 8, the OLED display 150 includes spacers SPC3 and SPC4 disposed at the same positions as the OLED display 100 according to the first embodiment shown in FIG.

That is, the spacers SPC3 and SPC4 include a third spacer SPC3 positioned at the intersection of the first imaginary line VL1 and the second imaginary line VL2 in a plane, and a third spacer SPC3 positioned at the intersection of the first imaginary line VL1 and the second imaginary line VL2, And a fourth spacer SPC4 located at the intersection of the imaginary line VL2.

The spacers SPC3 and SPC4 are located over the boundaries of the plurality of pixels arranged in the first direction and alternately arranged for each pixel. That is, the third spacer SPC3 is arranged on the first imaginary line VL1 every two pixels along the first direction, and the fourth spacer SPC4 is arranged on the third imaginary line VL3 in the first direction And the third spacer SPC3 are alternately arranged for every pixel.

The planar shape of the spacers SPC3 and SPC4 has a first side extending in the first direction and parallel to a long side of the third opening OM3 and a second side of the pixel adjacent to the second opening OM2 And a protrusion protruding toward an area between the first openings OM1. That is, the spacers SPC3 and SPC4 may include two protrusions protruding in both directions along the first direction and protrusions protruding in the direction opposite to the first side along the second direction.

The third spacer SPC3 and the fourth spacer SPC4 formed as described above are formed to protrude in the direction away from the third opening OM3 at both sides of the third opening OM3, They are arranged alternately left and right as they follow. That is, the third spacer SPC3 and the fourth spacer SPC4 are formed to be equal to each other with the third opening OM3 interposed therebetween.

The spacers SPC3 and SPC4 are located on the upper side of the pixel defining layer PDL in a sectional view and can be formed such that the thickness on the plane of the planar central portion is thicker than the thickness of the edge on the edge, Lt; / RTI > That is, the cross-sectional shape of the spacers SPC3 and SPC4 is lower at the edge on the plane and becomes higher toward the center.

9 is a plan view showing a part of a display region of an OLED display according to a second embodiment of the present invention. In FIG. 9, a pixel defining layer, an organic light emitting layer, and a spacer are shown for convenience, and a first deposition mask M1 is shown together, and a first electrode and some configurations not related to other descriptions are omitted.

9, the organic light emitting diode display 200 according to the present embodiment is the same as the display region of the organic light emitting display shown in FIG. 1 in the structure of the pixel defining layer and the organic light emitting layer. However, the formation of the spacer SPC5 The locations are different.

The first opening OM1, the second opening OM2 and the third opening OM3 are formed in the pixel defining layer PDL of the OLED display 200 according to the present embodiment. The first opening OM1, the second opening OM2 and the third opening OM3 are spaced apart from each other and the short sides of the first opening OM1 and the second opening OM2 are separated from the third opening OM3 ).

9, a fourth virtual line VL4 can be additionally defined in addition to the first virtual line VL1, the second virtual line VL2, and the third virtual line VL3 defined in FIG. 1 have. That is, the fourth virtual line VL4 may be defined as a virtual straight line passing between the first opening OM1 and the second opening OM2 belonging to the same pixel and extending in the second direction.

In this embodiment, the spacer SPC5 is located at the intersection of the first imaginary line VL1 and the fourth imaginary line VL4 in a plane, and the pixels SPC5 are arranged in the first direction and the second direction, Respectively. Also, unlike the first embodiment, no spacer is disposed on the second virtual line VL2 and the third virtual line VL3.

The planar shape of the spacer SPC5 is a triangle. The first side of the triangular spacer SPC5 extends in the first direction and is formed parallel to the long side of the third opening OM3. The first vertex opposed to the one side is positioned to face the region between the first opening OM1 and the second opening OM2 belonging to the same pixel.

9, when forming the spacer SPC5 of the OLED display 200 according to the present embodiment, the first deposition mask M1 is supported by the spacer SPC3 in the organic material deposition process, The edge of the opening OP1 of the first deposition mask M1 does not come into contact with the center of the spacer SPC5. Accordingly, it is possible to minimize or prevent foreign matter accumulation that may occur due to the edge of the opening OP1 of the first deposition mask M1 during the deposition process, and to prevent the defect from being caused by foreign matter accumulation.

Although the first deposition mask M1 is illustrated in FIG. 9, the second deposition mask M2 and the third deposition mask M3 may be used for depositing the organic luminescent material in the second opening OM2 and the third opening OM3, respectively. The edges of the openings OP2 and OP3 of the deposition masks M2 and M3 are not in contact with the center of the spacer SPC5 at this time.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

100, 150, 200: light emitting display device CE: common electrode
CL1, CL2: common layer E1: first electrode
E2: second electrode E3: third electrode
M1, M2, and M3: deposition masks OL1, OL2, and OL3:
OM1, OM2, OM3: openings OP1, OP2, OP3: mask openings
PC: Circuit part PDL: Pixel definition layer
SPC1, SPC2, SPC3, SPC4, SPC5: Spacer
SU1: first substrate SU2: second substrate
VL1, VL2, VL3, VL4: virtual line PX: pixel

Claims (23)

A first substrate;
A plurality of electrodes located on the first substrate;
A pixel defining layer disposed on the plurality of electrodes and including a plurality of openings exposing the plurality of electrodes; And
The spacer located on the pixel defining layer
Lt; / RTI >
Wherein the pixel defining layer has a first opening and a second opening adjacent to each other in the first direction with an interval therebetween and a second direction intersecting the first direction with an interval from the first opening and the second opening, And a third opening adjacent to the first opening,
Wherein the spacer includes a first imaginary line extending in the first direction and passing between the first opening and the third opening and an intersection of a second imaginary line extending in the second direction and passing between the first opening and the second opening, And an organic light emitting diode (OLED). The method according to claim 1,
A first organic emission layer on which a first organic emission material is deposited is formed on a first opening of the pixel defining layer, a second organic emission layer on which a second organic emission material is deposited is formed on a second opening of the pixel defining layer, And a third organic emission layer on which a third organic emission material is deposited is formed in a third opening of the pixel defining layer. 3. The method of claim 2,
Wherein at least one of the first organic luminescent material, the second organic luminescent material, and the third organic luminescent material is located on the pixel defining layer or the spacer. The method according to claim 1,
Wherein the first virtual line passes between the first opening and the third opening belonging to the one pixel and the second virtual line belongs to each pixel neighboring to the first direction, Passes between the second openings,
Wherein the spacer includes a first spacer located at an intersection of the first imaginary line and the second imaginary line. 5. The method of claim 4,
Further comprising a third imaginary line extending in the first direction and each belonging to a pixel neighboring in the second direction and passing between neighboring first and third openings,
Wherein the spacer further comprises a second spacer located at an intersection of the second imaginary line and the third imaginary line. 6. The method of claim 5,
Wherein the first spacer and the second spacer are alternately arranged in each pixel along the first direction. 6. The method of claim 5,
Wherein the first spacer and the second spacer are disposed for each pixel along the second direction. 6. The method of claim 5,
Wherein the first spacer and the second spacer are formed to be opposite to each other with the third opening interposed therebetween and protrude in opposite directions to each other. The method according to claim 1,
Wherein the spacer has a triangular planar shape. 10. The method of claim 9,
Wherein the spacer has a first side extending in the first direction and a first vertex opposite to the first side is protruded toward an area between the first opening and the second opening. The method according to claim 1,
Wherein the spacer has a polygonal planar shape having a first side extending in the first direction and a protruding portion facing the first side and projecting toward an area between the first opening and the second opening, Emitting display device. 12. The method of claim 11,
Wherein the spacer has a protrusion protruding toward an area between the first opening and the second opening and toward a region between the first opening or between the second opening and the third opening. The method according to claim 1,
The first imaginary line passes between the first opening and the third opening belonging to the one pixel,
And a fourth imaginary line extending in the second direction and passing between the first opening and the second opening belonging to the one pixel,
Wherein the spacer is located at an intersection of the first imaginary line and the fourth imaginary line. 14. The method of claim 13,
Wherein the spacers are disposed one by one along the first direction. 14. The method of claim 13,
Wherein the spacers are disposed one by one along the second direction. 14. The method of claim 13,
Wherein the spacer has a triangular planar shape. 17. The method of claim 16,
Wherein the spacer has a first side extending in the first direction and a first vertex opposite to the first side protrudes toward an area between the first opening and the second opening. 14. The method of claim 13,
Wherein the spacer has a polygonal planar shape having a first side extending in the first direction and a protruding portion facing the first side and projecting toward an area between the first opening and the second opening, Emitting display device. 19. The method of claim 18,
Wherein the spacer has a protrusion protruding toward an area between the first opening and the second opening and toward a region between the first opening or between the second opening and the third opening. 20. The method according to any one of claims 1 to 19,
Wherein the spacer is formed such that the thickness of the spacer on the plane of the center is larger than the thickness of the edge of the planar edge. Forming a plurality of electrodes on a first substrate;
Forming a pixel defining layer to cover the plurality of electrodes on the first substrate;
Exposing the plurality of electrodes by forming a plurality of openings in the pixel defining layer to correspond to the plurality of electrodes;
Forming a spacer on the pixel defining layer;
Placing a deposition mask on the spacer with a mask opening corresponding to the openings of the pixel defining layer; And
Depositing an organic luminescent material through the mask opening
Lt; / RTI >
Wherein the pixel defining layer has a first opening and a second opening adjacent to each other in the first direction with an interval therebetween and a second direction intersecting the first direction with an interval from the first opening and the second opening, And a third opening adjacent to the first opening,
Wherein the spacer includes a first imaginary line extending in the first direction and passing between the first opening and the third opening and an intersection of a second imaginary line extending in the second direction and passing between the first opening and the second opening, Lt; / RTI >
Wherein an edge of the mask opening is seated and spaced apart from a top end of the spacer. 22. The method of claim 21,
Wherein edges of the mask opening have curved edges. 22. The method of claim 21,
Wherein the step of depositing the organic luminescent material comprises:
Forming a first organic light emitting layer by depositing a first organic light emitting material on the first opening of the pixel defining layer and depositing a second organic light emitting material on the second opening of the pixel defining layer, And forming a third organic emission layer by depositing a third organic emission material on a third opening of the pixel defining layer.

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