KR20160029376A - Organic light emitting display device and method for manufacturing the same - Google Patents

Abstract

The organic light emitting display according to an embodiment of the present invention includes a plurality of first sub pixel regions aligned only on a first axis among a first axis, a second axis and a third axis which are parallel to each other, And a plurality of third sub pixel regions aligned only on a third one of the first axis, the second axis, and the third axis, The plurality of first sub pixel regions and the plurality of second sub pixel regions are aligned only on the fourth axis among the fourth axis and the fifth axis which are parallel to each other and the plurality of third sub pixel regions are arranged on the fourth axis and the fifth axis Of the first and second axes. In the organic light emitting diode display according to an embodiment of the present invention, the sub pixel regions are arranged so as to minimize the clogging of the opening of the mask for forming the organic light emitting layer.

Description

Technical Field [0001] The present invention relates to an organic light emitting diode (OLED) display device and a method of manufacturing the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display and a method of manufacturing the same. More particularly, the present invention relates to an organic light emitting diode (OLED) display device and a method of manufacturing the same, in which an opening of a mask for forming an organic light emitting layer is minimized.

The organic light emitting diode (OLED) is a self-emissive type display device, and unlike a liquid crystal display (LCD), a separate light source is not required, so that it can be manufactured in a light and thin shape. Further, the organic light emitting display device is not only advantageous from the viewpoint of power consumption by low voltage driving, but also excellent in color implementation, response speed, viewing angle, and contrast ratio (CR), and is being studied as a next generation display.

The organic light emitting diode display is generally manufactured by forming an organic light emitting layer for emitting red light, green light, and blue light in each sub pixel area. Specifically, the organic light emitting layer for emitting red light is formed in the red sub pixel region, the organic light emitting layer for emitting green light is formed in the green sub pixel region, and the organic light emitting layer for emitting blue light is formed in the blue sub pixel region, A display device is manufactured.

In the past, a stripe type arrangement in which red sub-pixel regions, green sub-pixel regions, and blue sub-pixel regions are arranged in a row has been mainly used in the manufacture of organic light emitting display devices. However, the stripe arrangement method is not easy to realize high resolution due to the black matrix disposed between the sub pixel regions. Therefore, research on a sub-pixel region array system that can achieve a higher aperture ratio outside the stripe-type array system has been continued.

Of the various sub-pixel region arrangements, attention has been paid to a scheme of disposing a red sub pixel region and a green sub pixel region along one axis parallel to the y axis and arranging blue sub pixel regions along another axis parallel to the y axis have. Such an arrangement method has an advantage that a higher aperture ratio can be secured than a stripe arrangement method.

1A is a schematic plan view of a conventional organic light emitting diode display device in which sub pixel regions are arranged along two parallel axes.

Referring to FIG. 1A, a conventional OLED display 100 includes a plurality of pixel regions PA. Each of the plurality of pixel regions PA includes a red sub pixel region RP, a green sub pixel region GP, and a blue sub pixel region BP as regions for emitting color.

As shown in Fig. 1A, a red sub pixel region RP and a green sub pixel region GP are arranged along one axis y1A parallel to the y axis. Specifically, two red sub pixel regions RP and two green sub pixel regions GP are alternately arranged along one axis y1A parallel to the y axis. The blue sub pixel regions BP are arranged along another axis y2A parallel to the y axis.

1A, a red sub pixel region RP and a blue sub pixel region BP are arranged along one axis x1A parallel to the x axis and another axis x2A parallel to the x axis, A green sub pixel region GP and a blue sub pixel region BP are arranged. Specifically, one set consisting of the red sub pixel region RP and the blue sub pixel region BP along the axes x1A and x2A parallel to the x axis, the green sub pixel region GP and the blue sub pixel region BP) are alternately arranged.

A mask in which a plurality of openings are patterned is used to form an organic light emitting layer in each of the red sub pixel region RP, the green sub pixel region GP and the blue sub pixel region BP. Particularly, in order to form the blue organic light emitting layer in the blue sub pixel region BP, a slit mask having an elongated opening is used.

1B is a plan view showing an opening pattern of a slit mask for forming a blue organic light emitting layer in the blue sub pixel region of FIG. 1A.

Referring to FIG. 1B, a plurality of blue sub-pixel regions BP aligned along an axis parallel to the y-axis are formed by using an elongated opening 160 pattern extending in a direction parallel to the y- . ≪ / RTI >

However, as the efforts to realize the organic light emitting display device at high resolution continue, the width of the blue sub pixel region BP gradually decreases, and accordingly, the width W1 of the elongated opening portion is also reduced. Actually, the width W1 of the opening 160 for forming the blue organic light emitting layer in the plurality of blue sub-pixel regions BP is only about 10 mu m when manufacturing the organic light emitting display device 100 of Fig. 1A .

The width W1 of the opening 160 gradually decreases so that the opening 160 is blocked by the organic material during the manufacturing process of the OLED display 100 or the metal that defines the opening 160 by heat So-called mask rib (MASK RIB) phenomenon occurs. There is a growing possibility that the organic light emitting diode display is manufactured in a defective manner due to the mask lag phenomenon. Accordingly, there is a continuing need for an organic light emitting display having a new sub pixel region array.

 [Related Technical Literature]

1. Mask, organic light emitting display, and method of manufacturing the same (Patent Application No. 10-2011-0085794)

The inventors of the present invention have recognized the problems that arise when manufacturing a conventional high-resolution organic light emitting display device as described above, and have developed a novel structure of an organic light emitting display device capable of minimizing a phenomenon that an opening portion of a mask is blocked by organic matter or heat .

SUMMARY OF THE INVENTION The present invention provides an organic light emitting diode (OLED) display device and a method of manufacturing the same, in which sub pixel regions are arranged to minimize mask lag phenomenon.

Another object of the present invention is to provide an organic light emitting diode display device and a method of manufacturing the same, in which sub pixel regions are arranged to extend the width of an opening of a mask.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an organic light emitting diode (OLED) display device including a plurality of first sub-pixels aligned in a first axis, a first sub- A plurality of second sub pixel regions aligned only in the second axis among the pixel region, the first axis, the second axis, and the third axis, and a plurality of second sub pixel regions aligned only in the third axis among the first axis, the second axis, And a plurality of first sub pixel regions and a plurality of second sub pixel regions are aligned only on a fourth axis among a fourth axis and a fifth axis which are parallel to each other, And the area is aligned only on the fifth axis among the fourth axis and the fifth axis. In the organic light emitting diode display according to an embodiment of the present invention, the sub pixel regions are arranged so as to minimize the clogging of the opening of the mask for forming the organic light emitting layer.

According to another aspect of the present invention, each of the first sub-pixel region, the second sub-pixel region, and the third sub-pixel region emits light of different colors, and one of red light, green light, and blue light It can emit light.

According to another aspect of the present invention, the first axis and the fourth axis may be perpendicular to each other.

According to another aspect of the present invention, the first axis, the second axis, and the third axis are separated from each other by 10 mu m or more, and the fourth axis and the fifth axis may be separated from each other by 10 mu m or more.

According to another aspect of the present invention, the first axis, the second axis, the third axis, the fourth axis, and the fifth axis may be positioned in the same plane.

According to another aspect of the present invention, each of the plurality of third sub pixel regions obtained when the organic light emitting display device is viewed from above has the same cross-section, is a rectangle having a long side and a cross section, 30 to 50 [mu] m.

According to another aspect of the present invention, the interval between the plurality of third sub pixel regions aligned along the fifth axis may be 30 to 50 mu m.

According to another aspect of the present invention, two first sub pixel regions and two second sub pixel regions may be alternately arranged along a fourth axis.

According to another aspect of the present invention, it is possible to further include a plurality of fourth sub pixel regions emitting white light.

According to another aspect of the present invention, a fourth sub pixel region may be disposed at an intersection of the third axis and the fourth axis.

According to another aspect of the present invention, one third sub pixel region and one fourth sub pixel region may be alternately arranged along the third axis.

According to another aspect of the present invention, a plurality of first sub pixel regions, a plurality of second sub pixel regions, and a plurality of fourth sub pixel regions may be aligned along a fourth axis.

According to an aspect of the present invention, there is provided an organic light emitting diode (OLED) display device including a plurality of first pixels aligned only on a first axis among a first axis, a second axis, and a third axis, A plurality of second pixel electrodes aligned only on a second one of the first axis, the second axis, and the third axis, a plurality of third pixels aligned only on the third axis among the first axis, the second axis, and the third axis, A first organic light emitting layer disposed on the first pixel electrode, a second organic light emitting layer disposed on the second pixel electrode, a third organic light emitting layer disposed on the third pixel electrode, and a first organic light emitting layer, And a common electrode disposed in common on the light emitting layer and the third organic light emitting layer, wherein the plurality of first pixel electrodes and the plurality of second pixel electrodes are aligned only on the fourth axis and the fourth axis, And the plurality of third pixel electrodes are aligned only on the fifth axis among the fourth axis and the fifth axis. In the organic light emitting display according to an embodiment of the present invention, the sub pixel regions are arranged to extend the width of the opening of the mask.

According to another aspect of the present invention, the third organic light emitting layer may be disposed in common on the plurality of third pixel electrodes aligned along the third axis.

According to another aspect of the present invention, two first pixel electrodes and two second pixel electrodes may be alternately arranged along a fourth axis.

According to another aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal layer, a first organic light emitting layer disposed on two first pixel electrodes aligned along a fourth axis, The light emitting layers can be disposed in common.

According to another aspect of the present invention, the display device may further include a plurality of fourth pixel electrodes disposed at intersections of the third axis and the fourth axis.

According to still another aspect of the present invention, a first organic light emitting layer is disposed in common on one first pixel electrode and one fourth pixel electrode aligned along a fourth axis, and the second organic light emitting layer is aligned And the third organic electroluminescent layer is disposed in common on the plurality of third pixel electrodes aligned along the third axis and the plurality of fourth pixel electrodes arranged in common on one second pixel electrode and one fourth pixel electrode, .

According to an aspect of the present invention, there is provided a method of manufacturing an organic light emitting diode display, including: forming a first electrode on a first axis, a second axis and a third axis, A plurality of second pixel electrodes are arranged so as to be aligned only on the second axis among the first axis, the second axis and the third axis, and a plurality of second pixel electrodes are arranged on the first axis, Arranging a plurality of third pixel electrodes so as to be aligned only on a third axis of the axis, disposing a first organic light emitting layer on the first pixel electrode, arranging a second organic light emitting layer on the second pixel electrode, Disposing a third organic light emitting layer on the three pixel electrodes, and disposing a common electrode commonly on the first organic light emitting layer, the second organic light emitting layer, and the third organic light emitting layer, The plurality of second pixel electrodes may include a fourth axis parallel to each other, It aligned only the fourth axis of the shaft 5, a plurality of third pixel electrode is characterized in that alignment only a fifth axis of the fourth axis and the fifth axis. The method of manufacturing an organic light emitting display according to an embodiment of the present invention can reduce the possibility of manufacturing a defective organic light emitting display.

According to still another aspect of the present invention, the step of disposing the third organic light emitting layer on the third pixel electrode includes a step of forming a third organic EL layer on the third pixel electrode aligned along the third axis, And a step of disposing an organic light emitting layer.

The details of other embodiments are included in the detailed description and drawings.

The present invention has the effect of minimizing the clogging of the opening of the mask for forming the organic light emitting layer during the manufacturing process of the organic light emitting diode display.

The present invention has the effect of greatly enlarging the width of the opening of the mask for forming the organic light emitting layer used in the manufacture of the organic light emitting diode display.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1A is a schematic plan view of a conventional organic light emitting diode display device in which sub pixel regions are arranged along two parallel axes.
1B is a plan view showing an opening pattern of a slit mask for forming a blue organic light emitting layer in the blue sub pixel region of FIG. 1A.
2A is a schematic plan view of an OLED display according to an exemplary embodiment of the present invention.
2B is a schematic cross-sectional view of the OLED display according to IIb-IIb 'of FIG. 2A.
2C is a schematic cross-sectional view of the organic light emitting diode display according to IIc-IIc 'of FIG. 2A.
FIG. 2D is a schematic perspective view of a first pixel electrode, a second pixel electrode, and a third pixel electrode according to an embodiment of the present invention.
2E is a plan view showing an opening pattern of the slit mask for disposing the third organic light emitting layer.
3A is a schematic plan view of an OLED display according to another embodiment of the present invention.
3B is a schematic cross-sectional view of the OLED display according to IIIb-IIIb 'of FIG. 3B.
4A is a schematic plan view of an OLED display according to another embodiment of the present invention.
4B is a schematic cross-sectional view of the OLED display according to IVb-IVb 'of FIG. 4A.
4C is a schematic cross-sectional view of the OLED display according to IVc-IVc 'of FIG. 4A.
5 is a flowchart illustrating a method of manufacturing an organic light emitting display according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

An element or layer is referred to as being another element or layer "on ", including both intervening layers or other elements directly on or in between.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, and technically various interlocking and driving are possible, and that the embodiments may be practiced independently of each other, It is possible.

Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

2A is a schematic plan view of an OLED display according to an exemplary embodiment of the present invention. 2B is a schematic cross-sectional view of the OLED display according to IIb-IIb 'of FIG. 2A. 2C is a schematic cross-sectional view of the organic light emitting diode display according to IIc-IIc 'of FIG. 2A.

2A to 2C, the OLED display 200 includes an overcoat layer 210, a first pixel electrode 220, a second pixel electrode 222, a third pixel electrode 224, The first organic emission layer 240, the second organic emission layer 242, the third organic emission layer 240, and the third organic emission layer 240. The pixel region 1P, the second sub pixel region 2P, the third sub pixel region 3P, the bank layer 230, (244) and a common electrode (250).

An overcoat layer 210 is disposed on a substrate, not shown. The overcoat layer 210 functions as a planarization layer as a layer for planarizing an upper portion of the substrate. The overcoat layer 210 includes a contact hole for electrically connecting the thin film transistor (not shown) and the first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224.

A plurality of first pixel electrodes 220, a plurality of second pixel electrodes 222 and a plurality of third pixel electrodes 224 are disposed on the overcoat layer 210. The first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224 are connected to the first organic light emitting layer 240, the second organic light emitting layer 242 and the third organic light emitting layer 244, respectively. And serves to apply a voltage. Each of the first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224 may be formed of a transparent conductive material having a high work function as an anode. For example, the first, second, and third pixel electrodes 220, 222, and 224 may be formed of indium tin oxide (ITO), indium zinc oxide (IZO) And indium tin zinc oxide (ITZO). The first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224 may further include a reflective layer in the case where the OLED display 200 is a top emission type OLED display .

The first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224 may be formed of the same material and the same thickness in a single process.

2B and 2C, the first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224 are separately arranged for each sub-pixel region. Specifically, the first pixel electrode 220 is disposed in the first sub pixel area 1P, the second pixel electrode 222 is disposed in the second sub pixel area 2P, the third pixel electrode 224, Is arranged in the third sub pixel area 3P.

Here, each of the first sub pixel region 1P, the second sub pixel region 2P and the third sub pixel region 3P is a region where light is emitted, and the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224, respectively. Specifically, the first sub pixel region 1P is a three-dimensional region overlapping the first pixel electrode 220, and the second sub pixel region 2P is a three-dimensional region overlapping the second pixel electrode 222. [ And the third sub pixel region 3P is a three-dimensional region overlapping with the third pixel electrode 224. [ The end face of the first pixel electrode 220, the end face of the second pixel electrode 222, and the end face of the third pixel electrode 224, which are obtained when the organic light emitting display device 200 is viewed from above, The cross section of the first sub pixel region 1P, the cross section of the second sub pixel region 2P, and the cross section of the third sub pixel region 3P, which are obtained when the apparatus 200 is viewed from above.

As shown in FIG. 2A, the first sub pixel region 1P, the second sub pixel region 2P, and the third sub pixel region 3P form one pixel region PA. That is, one pixel region PA includes a first sub pixel region 1P, a second sub pixel region 2P, and a third sub pixel region 3P. In each of the first, second, and third sub pixel regions 1P, 2P, and 3P, light of different colors is emitted. Specifically, light of any one of red, green, And is emitted. For example, green light is emitted in the first sub pixel region 1P, red light is emitted in the second sub pixel region 2P, and blue light is emitted in the third sub pixel region 3P do.

As shown in FIG. 2A, when viewed from the top of the OLED display 200, each of the first sub-pixel regions 1P has a rectangular cross-section of the same shape, and a plurality of second sub- The cross section of each of the regions 2P is formed into a quadrangle of the same shape, and the cross section of each of the plurality of third sub pixel regions 3P is formed of a quadrangle of the same shape. In particular, as viewed from the top of the OLED display 200, the cross-section of each of the plurality of third sub-pixel regions 3P is formed into a rectangle having long sides and short sides constantly, To 50 m.

2A, a first axis 1A, a second axis 2A, a third axis 3A, a fourth axis 4A, and a fifth axis 5A are disposed in the OLED display 200, . Referring to FIG. 2D, the first axis 1A, the second axis 2A, the third axis 3A, the fourth axis 4A and the fifth axis 5A will be described in more detail.

FIG. 2D is a schematic perspective view of a first pixel electrode, a second pixel electrode, and a third pixel electrode according to an embodiment of the present invention.

The first axis 1A, the second axis 2A and the third axis 3A are parallel to each other and mean three axes spaced apart by a predetermined distance. 2A and 2D, the first axis 1A, the second axis 2A, and the third axis 3A are parallel to the x-axis, and the organic light emitting display device 200, Quot; refers to three axes spaced apart by an interval of at least 10 [mu] m when viewed from the top. The first axis 1A, the second axis 2A, and the third axis 3A can be repeated in a predetermined pattern in the organic light emitting diode display 200.

The fourth axis 4A and the fifth axis 5A are parallel to each other and mean two axes spaced apart by a predetermined distance. For example, as shown in FIGS. 2A and 2D, the fourth axis 4A and the fifth axis 5A are parallel to the y-axis and mean two axes spaced apart by an interval of at least 10 μm. The fourth axis 4A and the fifth axis 5A may form a predetermined angle with the first axis 1A. For example, as shown in Figs. 2A and 2D, the fourth axis 4A and the fifth axis 5A may be perpendicular to the first axis 1A. The fourth axis 4A and the fifth axis 5A may be repeated in the organic light emitting diode display 200 in a predetermined pattern.

The first axis 1A, the second axis 2A, the third axis 3A, the fourth axis 4A and the fifth axis 5A may be located on the same plane. More specifically, as shown in FIG. 2D, the first axis 1A, the second axis 2A, the third axis 3A, the fourth axis 4A, May be positioned on a predetermined plane Pl including a vertical section of the electrode 220, a vertical section of the second pixel electrode 222, and a vertical section of the third pixel electrode 224.

2A and 2D, a plurality of first sub pixel regions 1P and a plurality of first pixel electrodes 220 are connected to the first axis 1A, the second axis 2A, and the third axis 3A, only in the first axis 1A. The plurality of second sub pixel regions 2P and the plurality of second pixel electrodes 222 are connected to the second axis 2A of the first axis 1A, the second axis 2A and the third axis 3A, Lt; / RTI > The plurality of third sub pixel regions 3P and the plurality of third pixel electrodes 224 are connected to the third axis 3A among the first axis 1A, the second axis 2A and the third axis 3A, Lt; / RTI >

2A and 2D, a plurality of first sub pixel regions 1P and a plurality of second sub pixel regions 2P are arranged on the fourth axis 4A and the fourth axis 4B of the fifth axis 5A, (4A). Similarly, the plurality of first pixel electrodes 220 and the plurality of second pixel electrodes 222 are aligned only on the fourth axis 4A of the fourth axis 4A and the fifth axis 5A. The plurality of third sub pixel regions 3P are aligned only on the fourth axis 4A and the fifth axis 5A of the fifth axis 5A. Similarly, the plurality of third pixel electrodes 224 are aligned only on the fourth axis 4A and the fifth axis 5A of the fifth axis 5A.

The interval between the plurality of third sub pixel regions 3P aligned along the fifth axis 5A may be 30 to 50 mu m, but is not limited thereto.

The bank layer 230 is disposed on the edge of each of the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224. The bank layer 230 serves to separate adjacent sub pixel regions. The bank layer 230 may be formed of a transparent organic insulating material such as polyimide, photo acryl, benzocyclobutene (BCB), or a material that exhibits black, such as a black resin Lt; / RTI >

A first organic light emitting layer 240 is disposed on the first pixel electrode 220 and a second organic light emitting layer 242 is disposed on the second pixel electrode 222. On the third pixel electrode 224, 3 organic light emitting layer 244 is disposed. A first organic light emitting layer 240 is formed on the first pixel electrode 220 of the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224, A second organic light emitting layer 242 is formed only on the second pixel electrode 222 of the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224, The third organic light emitting layer 244 is formed only on the third pixel electrode 224 of the pixel electrode 222 and the third pixel electrode 224. In other words, in each of the first sub pixel region 1P, the second sub pixel region 2P and the third sub pixel region 3P, the first organic light emitting layer 240, the second organic light emitting layer 242, Two or more of the organic light emitting layers 244 are not overlapped.

 Each of the first organic light emitting layer 240, the second organic light emitting layer 242 and the third organic light emitting layer 244 is connected to the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224, And is capable of emitting light. Each of the first organic light emitting layer 240, the second organic light emitting layer 242 and the third organic light emitting layer 244 emits light of different colors and specifically emits light of any one of red, .

Referring to FIG. 2C, the third organic light emitting layer 244 is disposed in common on the plurality of third pixel electrodes 224 aligned along the third axis 3A. Although the third organic emission layer 244 is shown as being disposed on only two of the third pixel electrodes 224 in FIG. 2C, the third organic emission layer 244 may include a plurality of The third pixel electrode 224 of the first pixel electrode 224 may be disposed in common. A slit mask having an elongated opening may be used to arrange the third organic light emitting layer 244 in common to the plurality of third pixel electrodes 224 aligned along the third axis 3A. Referring to FIG. 2E, the opening of the slit mask for disposing the third organic light emitting layer 244 will be further described.

2E is a plan view showing an opening pattern of the slit mask for disposing the third organic light emitting layer.

Referring to FIG. 2E, an opening 260 of a slit mask elongated in the x-axis direction is shown. The width W2 of the opening portion 260 of the slit mask for commonly arranging the third organic light emitting layer 244 corresponds to the length of the long side of the rectangle formed by the cross section of each of the plurality of third sub pixel regions 3P . For example, when the length of the long side of the rectangle formed by the cross section of each of the third sub pixel regions 3P is 30 to 50 mu m, the opening of the slit mask for commonly arranging the third organic light emitting layer 244 The width W2 of the protrusion 260 may also be 30 to 50 mu m.

In a conventional organic light emitting diode display, a slit mask having an elongated opening is used for commonly arranging organic light emitting layers on a plurality of pixel electrodes aligned along a certain axis. However, in order to realize a high-resolution organic light emitting display, the width of the opening of the slit mask was only about 10 mu m. Therefore, the opening of the slit mask is clogged by the organic material, or the metal that defines the opening of the slit mask is adhered to each other by heat.

However, in the OLED display 200 according to the embodiment of the present invention, only the first and second sub-pixel regions 1P, The second sub-pixel region 3P and the third sub-pixel region 3P are aligned so that the opening portion 260 of the mask extended elongated in the x-axis direction is used in addition to the opening portion of the mask elongated in the y- The pixel region 3P can be formed. Therefore, the width W2 of the opening portion 260 of the slit mask can be greatly extended to, for example, 30 to 50 mu m, so that the opening portion 260 of the slit mask is clogged or the opening portion 260 of the slit mask 260 Can be minimized.

A common electrode 250 is formed on the first organic light emitting layer 240, the second organic light emitting layer 242, and the third organic light emitting layer 244. The common electrode 250 is disposed to face the first pixel electrode 220, the second pixel electrode 222 and the third pixel electrode 224 and includes a first organic light emitting layer 240, a second organic light emitting layer 242, And to apply a voltage to the third organic light emitting layer 244. The common electrode 250 may be connected to a separate power supply voltage line to apply the same voltage to all sub-pixel regions, and may be formed to have a very thin thickness and be substantially transparent. The common electrode 250 may be formed of a metallic material having a low work function such as Ag, Ti, Al, Mo, or an alloy of Ag and Mg Lt; / RTI >

3A is a schematic plan view of an OLED display according to another embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the OLED display 200 according to IIIb-IIIb 'of FIG. 3B.

The organic light emitting display 300 of FIGS. 3A and 3B is different from the organic light emitting display 200 of FIGS. 2A to 2D in that two first sub pixel regions 1P are formed along the fourth axis 4A, And a configuration in which the first and second axes 2A and 2B are alternately arranged and the pattern in which the first axis 1A, the second axis 2A and the third axis 3A are repeated, The first organic light emitting layer 340 and the second organic light emitting layer 342 are disposed in common on the two first pixel electrodes 220 and the two second pixel electrodes 222, And the remainder of the configuration is substantially the same, so redundant description is omitted.

Referring to FIGS. 3A and 3B, two first sub pixel regions 1P and two second sub pixel regions 2P are alternately arranged along a fourth axis 4A. Accordingly, in the OLED display 200 of FIGS. 2A to 2D, a group formed by one first axis 1A, one second axis 2A, and one third axis 3A is repeated in a pattern 3A to 3B, a group formed by two first axes 1A, two second axes 2A, and two third axes 3A is repeated in a pattern .

Referring to FIG. 3B, the first organic light emitting layer 340 is disposed in common on the two first pixel electrodes 220 aligned along the fourth axis 4A. The second organic light emitting layer 342 is disposed in common on the two second pixel electrodes 222 aligned along the fourth axis 4A. The first organic light emitting layer 340 and the second organic light emitting layer 342 are formed in common on the two first pixel electrodes 220 and the two second pixel electrodes 222 aligned along the fourth axis 4A A slot mask having a rectangular opening whose length is comparatively comparable to the length of the short side can be used.

When the two first sub pixel regions 1P and the two second sub pixel regions 2P are alternately arranged as in the OLED display 300 according to another embodiment of the present invention, The first organic light emitting layer 240 and the second organic light emitting layer 242 can be disposed in common on the first pixel electrode 220 and the two second pixel electrodes 222, Lt; / RTI > can be used. Accordingly, it is possible to realize an organic light emitting display having a higher resolution than that of the organic light emitting display having the same display area.

4A is a schematic plan view of an OLED display according to another embodiment of the present invention. 4B is a schematic cross-sectional view of the OLED display according to IVb-IVb 'of FIG. 4A. 4C is a schematic cross-sectional view of the OLED display according to IVc-IVc 'of FIG. 4A.

The organic light emitting display 400 of FIGS. 4A to 4C is different from the organic light emitting display 200 of FIGS. 2A to 2D in that a plurality of fourth sub pixel regions 4P, a plurality of fourth pixel electrodes 426 and the arrangement of the first organic light emitting layer 440, the second organic light emitting layer 442 and the third organic light emitting layer 444 are the same and the remaining components are substantially the same, .

4A to 4C, an OLED display 400 according to another embodiment of the present invention includes a plurality of fourth pixel electrodes 426 and a plurality of fourth sub pixel regions 4P.

Each of the plurality of fourth sub pixel regions 4P overlaps the fourth pixel electrode 426 as a three-dimensional region where white light can be emitted.

A plurality of fourth pixel electrodes 426 are disposed on the overcoat layer 210. Each of the plurality of fourth pixel electrodes 426 may be formed of the same material and thickness as those of the first pixel electrode 220, the second pixel electrode 222, and the third pixel electrode 224. The cross section of the fourth pixel electrode 426 obtained when the organic light emitting display 400 is viewed from above is a cross section of the fourth sub pixel region 4P obtained when the organic light emitting display 400 is viewed from above. Section.

4A, each of the plurality of fourth pixel regions 4P is disposed at a position where the third axis 3A intersects with the fourth axis 4A, and each of the plurality of fourth pixel electrodes 426 And is arranged at a point where the third axis 3A and the fourth axis 4A intersect.

Referring to FIGS. 4A and 4C, one third sub pixel region 3P and one fourth sub pixel region 4P are alternately aligned along the third axis 3A. Similarly, one third pixel electrode 224 and one fourth pixel electrode 426 are alternately aligned along the third axis 3A.

4A and 4B, a plurality of first sub pixel regions 1P, a plurality of second sub pixel regions 2P, and a plurality of fourth sub pixel regions 4P are formed along the fourth axis 4A, Aligned. Similarly, a plurality of first pixel electrodes 220, a plurality of second pixel electrodes 222, and a plurality of fourth pixel electrodes 426 are aligned along the third axis 3A.

Referring to FIG. 4B, a first organic light emitting layer 440 is disposed in common on one first pixel electrode 220 and one fourth pixel electrode 426 aligned along the fourth axis 4A. The second organic light emitting layer 442 is disposed on one second pixel electrode 222 and one fourth pixel electrode 426 aligned along the fourth axis 4A. Referring to FIG. 4C, a third organic light emitting layer 444 is disposed in common on the plurality of third pixel electrodes 224 and the plurality of fourth pixel electrodes 426 aligned along the third axis 3A.

The first organic light emitting layer 440, the second organic light emitting layer 442, and the third organic light emitting layer 412, which emit light of different colors and emit light of any one of red, green, and blue on the fourth pixel electrode 426, The light emitting layer 444 is superposed and arranged, and white light can be emitted in the fourth sub pixel region 4P.

5 is a flowchart illustrating a method of manufacturing an organic light emitting display according to an embodiment of the present invention.

First, a plurality of first pixel electrodes are arranged on a substrate so as to be aligned only on a first axis among a first axis, a second axis and a third axis which are parallel to each other, and the first, A plurality of second pixel electrodes are arranged so as to be aligned only on the second axis, and a plurality of third pixel electrodes are arranged on only the third axis among the first axis, the second axis and the third axis (S510).

The first pixel electrode, the second pixel electrode, and the third pixel electrode may be simultaneously formed in one process using a patterned mask.

Next, a first organic emission layer is formed on the first pixel electrode (S520).

The first organic emission layer may be formed using a patterned slot mask. The first organic light emitting layer may be formed on the two first pixel electrodes in common.

Next, a second organic emission layer is formed on the second pixel electrode (S530).

The second organic emission layer may be formed using a patterned slot mask. And the second organic light emitting layer may be formed on the two first pixel electrodes in common.

Next, a third organic emission layer is formed on the third pixel electrode (S540).

And the third organic light emitting layer may be formed in common on the plurality of third pixel electrodes aligned along the third axis. In order to form the third organic light emitting layer, a patterned slit mask may be used. The width of the opening of the slit mask for forming the third organic light emitting layer may be 30 to 50 탆.

Next, a common electrode is formed on the first, second and third organic light emitting layers (S550).

In the case of using the method of manufacturing an organic light emitting display according to an embodiment of the present invention, the width of the slit mask for forming the third organic light emitting layer can be greatly increased. Therefore, it is possible to suppress the clogging of the opening portion of the slit mask at the time of manufacturing the organic light emitting display device.

Although the foregoing description has been made with respect to the organic light emitting display device of the top emission type, the pixel array structure of the present invention can be equally applied to the bottom emission organic light emitting display device.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

200, 300, 400: organic light emitting display
RP: pixel area
1P: a first sub pixel region
2P: second sub pixel region
3P: a third sub pixel region
4P: a fourth sub pixel region
1A: 1st axis
2A: 2nd axis
3A: 3rd axis
4A: fourth axis
5A: fifth axis
P1: plane
160, 260:
210: overcoat layer
220, a first pixel electrode
222: second pixel electrode
224: a third pixel electrode
230: bank layer
240, 440: a first organic light emitting layer
242, 342, 442: a second organic light emitting layer
244, 444: a third organic light emitting layer
250: common electrode
426: a fourth pixel electrode

Claims (20)

A plurality of first sub pixel regions aligned only on the first axis among a first axis, a second axis and a third axis which are parallel to each other;
A plurality of second sub pixel regions aligned only on the second axis among the first axis, the second axis, and the third axis; And
And a plurality of third sub pixel regions aligned only on the third axis among the first axis, the second axis, and the third axis,
Wherein the plurality of first sub pixel regions and the plurality of second sub pixel regions are aligned only on the fourth axis among a fourth axis and a fifth axis which are parallel to each other,
And the plurality of third sub-pixel regions are aligned only on the fifth axis among the fourth and fifth axes. The method according to claim 1,
Wherein each of the first sub pixel region, the second sub pixel region and the third sub pixel region emits light of different colors and emits one of red light, green light and blue light. And the organic light emitting display device. The method according to claim 1,
Wherein the first axis and the fourth axis are perpendicular to each other. The method according to claim 1,
Wherein the first axis, the second axis, and the third axis are spaced apart by 10 占 퐉 or more from each other,
And the fourth axis and the fifth axis are separated from each other by 10 mu m or more. The method according to claim 1,
Wherein the first axis, the second axis, the third axis, the fourth axis, and the fifth axis are positioned in the same plane. Sectional areas of the plurality of third sub pixel regions are equal to each other and are rectangular having a long side and a cross section,
Wherein a length of the long side of the rectangle is 30 to 50 mu m. The method according to claim 1,
And the interval between the plurality of third sub pixel regions aligned along the fifth axis is 30 to 50 占 퐉. The method according to claim 1,
Wherein two of the first sub pixel regions and the two second sub pixel regions are alternately arranged along the fourth axis. The method according to claim 1,
And a plurality of fourth sub-pixel regions for emitting white light. 10. The method of claim 9,
And the fourth sub pixel region is disposed at an intersection of the third axis and the fourth axis. 10. The method of claim 9,
And one third sub pixel region and one fourth sub pixel region are alternately arranged along the third axis. 9. The method of claim 8,
Wherein the plurality of first sub pixel regions, the plurality of second sub pixel regions, and the plurality of fourth sub pixel regions are aligned along the fourth axis. A plurality of first pixel electrodes aligned only on the first axis among a first axis, a second axis and a third axis which are parallel to each other;
A plurality of second pixel electrodes aligned only on the second axis among the first axis, the second axis, and the third axis;
A plurality of third pixel electrodes aligned only on the third axis among the first axis, the second axis, and the third axis;
A first organic emission layer disposed on the first pixel electrode;
A second organic emission layer disposed on the second pixel electrode;
A third organic light emitting layer disposed on the third pixel electrode; And
And a common electrode disposed on the first organic light emitting layer, the second organic light emitting layer, and the third organic light emitting layer,
Wherein the plurality of first pixel electrodes and the plurality of second pixel electrodes are aligned only on the fourth axis among a fourth axis and a fifth axis which are parallel to each other,
Wherein the plurality of third pixel electrodes are aligned only on the fifth axis among the fourth axis and the fifth axis. 14. The method of claim 13,
And the third organic emission layer is disposed in common on the plurality of third pixel electrodes aligned along the third axis. 14. The method of claim 13,
Wherein two of the first pixel electrodes and the two second pixel electrodes are alternately arranged along the fourth axis. 16. The method of claim 15,
Wherein the first organic light emitting layer is commonly disposed on two first pixel electrodes aligned along the fourth axis and the second organic light emitting layer is common to two second pixel electrodes aligned along the fourth axis The organic light emitting display device comprising: 14. The method of claim 13,
And a plurality of fourth pixel electrodes disposed at intersections of the third axis and the fourth axis. 18. The method of claim 17,
Wherein the first organic light emitting layer is disposed in common on one first pixel electrode and one fourth pixel electrode aligned along the fourth axis,
Wherein the second organic light emitting layer is disposed in common on one second pixel electrode and one fourth pixel electrode aligned along the fourth axis,
Wherein the third organic light emitting layer is disposed in common on a plurality of third pixel electrodes and a plurality of fourth pixel electrodes aligned along the third axis. A plurality of first pixel electrodes are arranged on the substrate so as to be aligned only on the first axis among a first axis, a second axis and a third axis which are parallel to each other, and the first axis, the second axis, A plurality of second pixel electrodes are arranged so as to be aligned only in the second axis among the axes and a plurality of third pixel electrodes are arranged to be aligned only in the third axis among the first axis, the second axis and the third axis step;
Disposing a first organic light emitting layer on the first pixel electrode;
Disposing a second organic light emitting layer on the second pixel electrode;
Disposing a third organic light emitting layer on the third pixel electrode;
And disposing a common electrode in common on the first organic light emitting layer, the second organic light emitting layer, and the third organic light emitting layer,
Wherein the plurality of first pixel electrodes and the plurality of second pixel electrodes are aligned only on the fourth axis among a fourth axis and a fifth axis which are parallel to each other,
Wherein the plurality of third pixel electrodes are aligned only on the fifth axis among the fourth axis and the fifth axis. The method of claim 19, wherein
And disposing the third organic light emitting layer on the third pixel electrode includes disposing the third organic light emitting layer in common on the plurality of third pixel electrodes aligned along the third axis using one mask Wherein the organic light emitting display device further comprises an organic light emitting diode.

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