JP6487898B2 - Organic light emitting display - Google Patents

Description

  The present invention relates to an organic light emitting display device, and more particularly, to an organic light emitting display device capable of preventing a light leakage phenomenon.

  The organic light-emitting display device is a self-luminous display device, and unlike a liquid crystal display device, it does not require a separate light source and can be manufactured to be light and thin. In addition, the organic light emitting display device is not only advantageous in terms of power consumption due to low voltage driving, but also excellent in color realization, response speed, viewing angle, and contrast ratio (CR), and as a next generation display. It has been studied.

  The light emitted from the organic light emitting layer of the organic light emitting display device passes through some components of the organic light emitting display device and comes out of the organic light emitting display device. However, among the light emitted from the organic light emitting layer, there is a light that does not go out of the organic light emitting display device and is confined inside the organic light emitting display device, so that the light extraction efficiency of the organic light emitting display device is a problem. It becomes.

  Particularly, in the organic light emitting display device having a lower light emitting structure among the organic light emitting display devices, light confined in the organic light emitting display device due to total reflection or light absorption by the anode electrode is emitted from the organic light emitting layer. It accounts for about 50% of the light. Further, light confined inside the organic light emitting display device due to total reflection or light absorption by the substrate accounts for about 30% of the light emitted from the organic light emitting layer. As described above, about 80% of the light emitted from the organic light emitting layer is confined in the organic light emitting display device, and only about 20% of the light is extracted to the outside. Therefore, the light efficiency is very low. .

  In order to improve the light extraction efficiency of such an organic light emitting display device, a microlens array (MLA) is attached to the outside of the substrate of the organic light emitting display device, or a microlens array (MLA) is attached to the overcoat layer of the organic light emitting display device. A method of forming a lens has been proposed.

  However, when the microlens array is introduced outside the substrate of the organic light emitting display device or the microlens is formed on the overcoat layer, the light generated from the organic light emitting layer reaches the polarizing plate through the substrate and is polarized. Reflected again from the plate, the path is switched in the direction of the substrate. Here, a part of the light traveling in the substrate direction reaches a microlens of an adjacent pixel that emits another color, causing a light leakage phenomenon.

  SUMMARY OF THE INVENTION The present invention is to solve the above-described problems and to provide an organic light emitting display device that can prevent light leakage of the organic light emitting display device and improve light extraction efficiency. It is.

  In order to solve the above-described problems of the prior art, an organic light emitting display device according to the present invention includes a substrate divided into a plurality of subpixels emitting different colors, and at least one subpixel among the plurality of subpixels. A light leakage prevention layer disposed in a region corresponding to the light emitting region of the pixel, a first microlens disposed on the substrate in at least one subpixel, and configured by a plurality of concave portions or a plurality of convex portions; and An organic light emitting device is disposed on the microlens.

  The plurality of sub-pixels are divided into red, green, blue and white sub-pixels, and first to fourth light leakage prevention layers are disposed in the respective sub-pixels. At least two light leakage prevention layers among the first to fourth light leakage prevention layers can transmit light of the same color. In addition, at least one of the first to fourth light leakage prevention layers can transmit the complementary color light of the light that passes through the other light leakage prevention layers.

  Also, the organic light emitting display device of the present invention is disposed in at least one of the subpixels excluding the subpixel in which the first microlens is disposed, and is the same as or different from the first microlens. A second microlens can be included. Further, a third microlens that is the same as or different from the first and second microlenses can be further included.

  In addition, the organic light emitting display device of the present invention may include a light leakage prevention layer non-arranged region in at least one subpixel. In addition, at least one of the plurality of subpixels may include a first microlens non-arranged region.

  The organic light emitting display device according to the present invention includes a light leakage prevention layer disposed in a region corresponding to the light emitting region in at least one subpixel of the plurality of subpixels, so that the subpixels are different from each other. Alternatively, it is possible to suppress the light leakage phenomenon that occurs between different pixels, and to prevent the efficiency of light emitted from the organic light emitting element from being deteriorated.

  In addition, the organic light emitting display device according to the present invention includes subpixels including different microlenses in a pixel composed of a plurality of subpixels, or subpixels in which microlenses are not arranged. Light extraction efficiency can be adjusted for each pixel, and light leakage can be prevented.

It is a figure which shows the display apparatus by embodiment simply. 1 is a plan view of an organic light emitting display device according to a first embodiment of the present invention; 1 is a cross-sectional view taken along line AB of an organic light emitting display device according to a first embodiment of the present invention. FIG. 5 is a plan view of an organic light emitting display device according to a second embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line CD of an organic light emitting display device according to a second embodiment of the present invention. FIG. 6 is a plan view of an organic light emitting display device according to a third embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line EF of an organic light emitting display device according to a third embodiment of the present invention. FIG. 6 is a plan view of an organic light emitting display device according to a fourth embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line GH of an organic light emitting display device according to a fourth embodiment of the present invention. FIG. 6 is a plan view of an organic light emitting display device according to a fifth embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line I-J of an organic light emitting display device according to a fifth embodiment of the present invention. FIG. 9 is a plan view of an organic light emitting display device according to a sixth embodiment of the present invention. FIG. 10 is a cross-sectional view taken along a line KL of an organic light emitting display device according to a sixth embodiment of the present invention. FIG. 9 is a plan view of an organic light emitting display device according to a seventh embodiment of the present invention. FIG. 10 is a cross-sectional view taken along line MN of an organic light emitting display device according to a seventh embodiment of the present invention. It is a figure which shows the arrangement structure of the insulating layer of the 4th sub pixel and 4th light leakage prevention layer by another embodiment. FIG. 17 is a graph illustrating an effect of reducing reflectance of the organic light emitting display device according to FIG. 16. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments introduced below are provided as examples in order to fully convey the concept of the present invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments described below, and can be embodied in other shapes. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

  Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be embodied in various shapes different from each other. However, the present disclosure is only a complete disclosure of the present invention. Thus, it is provided in the technical field to which the present invention pertains to fully convey the scope of the invention to those skilled in the art, and the present invention is only defined by the categories of the claims. Like reference numerals refer to like elements throughout the specification. The size and relative size of layers and regions in the drawings may be exaggerated for clarity of explanation.

  An element or layer is referred to as another element or “on” or “on” as well as directly above another element or layer. Any of the cases in which other layers or other elements are interposed in the above are included. On the other hand, a device being referred to as “directly on” or “directly above” indicates that no other device or layer is interposed therebetween.

  The spatially relative terms “Below, BenEAth”, “lower”, “above”, “upper”, etc., represent one element as shown in the drawing. Or it can be used to easily describe the correlation between a component and other elements or components. Spatial relative terms are to be understood as terms that include different directions of the elements in use or operation, in addition to the directions shown in the drawings. For example, when the element shown in the drawing is reversed, an element described as “Below” or “Beneath” of another element is replaced with “ABove” of the other element. Can be located. Thus, the exemplary term “down” can include both down and up directions.

  In describing the components of the present invention, terms such as first, second, A, B, (a), and (B) can be used. These terms are merely for distinguishing the constituent elements from other constituent elements, and the essence, order, order, number, etc. of the constituent elements are not limited by the terms.

  FIG. 1 is a diagram schematically illustrating a display device according to an embodiment. Referring to FIG. 1, the display device 1000 according to the embodiment includes a plurality of first lines VL <b> 1 to VLm in a first direction that is a vertical direction, and a plurality of second lines in a second direction that is a horizontal direction. The display panel 1100 in which the lines HL1 to HLn are formed, the first driver 1200 that supplies the first signal to the multiple first lines VL1 to VLm, and the second to the multiple second lines HL1 to HLn. And a timing controller 1400 for controlling the first driving unit 1200 and the second driving unit 1300, and the like.

  The display panel 1100 includes a plurality of pixels (by crossing a number of first lines VL1 to VLm formed in the first direction and a number of second lines HL1 to HLn formed in the second direction. P: Pixel) is defined.

  Each of the first driving unit 1200 and the second driving unit 1300 described above may include at least one driving integrated circuit (Driver IC) that outputs a signal for displaying an image.

  As an example, the first lines VL1 to VLm formed in the first direction on the display panel 1100 are formed in the vertical direction, and data for transmitting a data voltage (first signal) to the pixel columns in the vertical direction. The first driving unit 1200 may be a data driving unit that supplies a data voltage to the data wiring.

  In addition, a large number of second lines HL1 to HLn formed in the second direction on the display panel 1100 are formed in the horizontal direction and transmit gate signals (first signals) to the horizontal pixel columns. The second driver 1300 may be a gate driver that supplies a scan signal to the gate wiring.

  Further, in order to connect the first driving unit 1200 and the second driving 1300, the display panel 1100 includes a pad unit. When the pad unit supplies the first signal to the first lines VL1 to VLm from the first driver 1200, the first signal is transmitted to the display panel 1100. Similarly, the pad unit receives a number of second signals from the second driver 1300. When the second signal is supplied to the two lines HL1 to HLn, it is transmitted to the display panel 1100.

  Meanwhile, the pixel of the present invention includes one or more subpixels. The colors defined in the sub-pixel may include red (R), green (G), blue (B) and white (W) selectively, but the present invention is not limited thereto.

  In addition, an electrode connected to a thin film transistor that controls light emission of each sub-pixel of the display panel is a first electrode, and an electrode that is arranged on the front surface of the display panel or includes two or more pixels is a first electrode. 2 electrode. When the first electrode is an anode electrode, the second electrode is a cathode electrode, and vice versa. The following description will focus on an anode electrode as an embodiment of the first electrode and a cathode electrode as an embodiment of the second electrode, but the present invention is not limited to this.

  In addition, the organic light emitting display device can be classified into a top emission method or a bottom emission method according to the structure of the organic light emitting device. In the embodiments to be described later, an organic light emitting display device for the lower light emission method will be mainly described, but the present invention is not limited thereto.

  In addition, a single color filter is arranged in the sub-pixel described above, or it becomes a reference for not arranging them. The color filter converts the color of a single organic light emitting layer into a specific wavelength color. Each subpixel may be provided with a light-scattering layer for increasing the light extraction efficiency of the organic light emitting layer. The scattering layer described above can be named as a microlens array, a nano pattern, a diffusion pattern, or a silica bead.

  Hereinafter, the microlens array will be mainly described as an embodiment of the scattering layer. However, the embodiment according to the present invention is not limited thereto, and various structures that scatter light can be combined.

  Next, referring to FIG. 2, a plan view of the OLED display according to the first exemplary embodiment of the present invention is as follows. FIG. 2 is a plan view of the organic light emitting display device according to the first embodiment of the present invention.

  Referring to FIG. 2, in the organic light emitting display device according to the first embodiment of the present invention, one pixel (P) includes a plurality of subpixels. Specifically, one pixel (P) may include four subpixels. On the other hand, in the embodiment of the present invention to be described later, one pixel (P) will be described focusing on a configuration including four sub-pixels. However, the embodiment of the present invention is not limited to these, and one pixel (P) Any configuration in which the pixel (P) includes 2 to 4 sub-pixels can be included.

  The plurality of subpixels may include light emitting areas EA11, EA21, EA31, and EA41, respectively. For example, the first sub-pixel includes a first light-emitting area EA11, the second sub-pixel includes a second light-emitting area EA21, the third sub-pixel includes a third light-emitting area EA31, The fourth subpixel includes a fourth light emitting area EA41.

  At this time, the first to fourth light emitting areas EA11, EA21, EA31, and EA41 can emit red (R), green (G), blue (B), and white (W) light, respectively. The embodiment of the present invention is not limited to these, and it is sufficient if at least two of the light emitting areas EA11, EA21, EA31, and EA41 emit light in different colors.

  On the other hand, each light emitting area EA11, EA21, EA31, EA41 is provided with a plurality of microlenses. The shape of the microlens arranged in each light emitting area EA11, EA21, EA31, EA41 can be made the same. Such a microlens can improve the external light extraction efficiency of the organic light emitting device. The plurality of microlenses includes a first concave portion 201 of the overcoat layer 120 and a first coupling portion 202 that couples the first concave portion 201 disposed adjacent to the first concave portion. be able to.

  At this time, microlenses having the same shape may be disposed in the first to fourth light emitting areas EA11, EA21, EA31, and EA41. Such a configuration will be described in detail with reference to FIG. 3 as follows.

  FIG. 3 is a cross-sectional view taken along line AB of the organic light emitting display device according to the first embodiment of the present invention. Referring to FIG. 3, the organic light emitting display according to the first embodiment of the present invention includes first to fourth sub-pixels SP1, SP2, SP3, and SP4.

  On the other hand, of the light emitted from the organic light emitting element EL, part of the light traveling in the direction of the substrate 100 reaches an adjacent subpixel emitting another color or a microlens of another pixel arranged adjacently. This can cause a light leakage phenomenon. Specifically, when the display device includes subpixels that do not include a color filter, light leakage components generated from other subpixels reach the microlens of the subpixel that does not include a color filter and are visually recognized. Occurs greatly. In particular, when no color filter is arranged in the white (W) sub-pixel, the light leakage component generated in the other sub-pixel reaches the micro lens of the white (W) sub-pixel to the viewer. There is a problem that is visible.

  In order to solve this problem, the OLED display according to the present invention includes light leakage prevention layers 110, 111, and 112 disposed on a substrate 100 divided into first to fourth subpixels SP1, SP2, SP3, and SP4. , 113. In detail, a first light leakage prevention layer 110 is disposed on the first subpixel SP1, a second light leakage prevention layer 111 is disposed on the second subpixel SP2, and a third subpixel SP2 is disposed. A third light leakage prevention layer 112 is disposed on the pixel SP3, and a fourth light leakage prevention layer 113 is disposed on the fourth subpixel SP4.

  An overcoat layer 120 is disposed on the substrate 100 including the first to fourth light leakage prevention layers 110, 111, 112, and 113. On the overcoat layer 120, an organic light emitting element EL including a first electrode 130, an organic light emitting layer 140, and a second electrode 150 is disposed.

  At this time, the organic light emitting device EL includes a microlens for improving external light extraction efficiency in the light emitting areas EA11, EA21, EA31, and EA41. The light emitting areas EA11, EA21, EA31, and EA41 may be defined by a bank pattern 160 disposed to expose a part of the upper surface of the first electrode 130.

  Specifically, the overcoat layer 120 connects the plurality of first recesses 201 and the other first recesses 201 disposed adjacent to the first recesses 201 in the light emitting areas EA11, EA21, EA31, and EA41. A microlens composed of a first connecting portion. On the other hand, when the organic light emitting element EL includes a microlens in the light emitting areas EA11, EA21, EA31, and EA41, due to the characteristics of the pattern, the plurality of concave portions (161) formed in the overcoat layer 120 causes the organic light emitting element EL to A concave bend occurs on the surface.

  On the other hand, the first to fourth light leakage prevention layers 110, 111, 112, and 113 are respectively connected to the light emitting areas EA11, EA21, EA31, and EA41 of the first to fourth subpixels SP1, SP2, SP3, and SP4. It can be placed in the corresponding area. Accordingly, the OLED display according to the first exemplary embodiment of the present invention can suppress the light leakage phenomenon between different subpixels. Here, the first to fourth light leakage prevention layers 110, 111, 112, and 113 can transmit light of a specific wavelength and absorb the remaining wavelength light. In addition, since at least one of the first to fourth light leakage prevention layers 110, 111, 112, and 113 is thinner than the remaining light leakage prevention layers, The light transmittance can be increased as compared with the leakage preventing layer.

  The principle by which the light leakage phenomenon is prevented by the first to fourth light leakage prevention layers 110, 111, 112, and 113 will be described in detail. The first electrode 130 of the organic light emitting device EL and the organic light emitting layer 140 are described. The refractive index of can be greater than the refractive index of the substrate 100 and the overcoat layer 120. For example, the refractive index of the substrate 100 and the overcoat layer 120 is about 1.5, and the refractive index of the first electrode 130 and the organic light emitting layer 140 of the organic light emitting device EL is 1.7 to 2.0. There may be.

  At this time, a part of the light 800 emitted from the organic light emitting layer 140 is reflected by the second electrode 150, the optical path is switched in the direction of the first electrode 130, and the remaining part is the first electrode. Is emitted in the direction of the electrode 130. That is, most of the light 800 emitted by the organic light emitting layer 140 is directed toward the first electrode 130.

  Here, since the refractive indexes of the organic light emitting layer 140 and the first electrode 130 are substantially the same, the light 800 emitted from the organic light emitting layer 140 is emitted from the organic light emitting layer 140 and the first electrode 130. The optical path is not changed at the interface. On the other hand, the light that has passed through the first electrode 130 has a critical angle at the interface between the first electrode 130 and the overcoat layer 120 due to a difference in refractive index between the first electrode 130 and the overcoat layer 120. The incident light can be totally reflected.

  At this time, the light totally reflected at the interface between the first electrode 130 and the overcoat layer 120 is reflected again by the second electrode 150, and the light reflected again by the second electrode 150 is an organic light emission. Through the layer 140 and the first electrode 130, the light passes through the substrate 100 having substantially the same refractive index as that of the overcoat layer 140, reaches a polarizing plate (not shown) disposed on the back surface of the substrate 100, and Reflected again by a plate (not shown), the path is switched in the direction of the substrate 100.

  Meanwhile, the organic light emitting display device according to the first embodiment of the present invention is disposed on the substrate 100, and the first to fourth light leakage prevention layers 110, 111, and 112 are formed in regions corresponding to the respective light emitting regions. , 113 prevents light traveling at an angle greater than the total reflection critical angle from reaching other adjacent subpixels or microlenses of other adjacent pixels.

  Specifically, the light 800 emitted from the organic light emitting layer 140 undergoes total reflection at the interface between the first electrode 130 and the overcoat layer 120, is reflected again by the second electrode 150, and the path is switched toward the substrate 100. . Here, the light traveling at an angle larger than the total reflection critical angle passes through the overcoat layer 120 and the substrate 100 and is reflected again at the interface between the substrate 100 and a polarizing plate (not shown), in the direction of the substrate 100. The optical path is switched.

  Then, the light whose path is changed in the direction of the substrate 100 passes through the substrate 100 again, and is one of the first to fourth light leakage prevention layers 110, 111, 112, 113 disposed on the substrate 100. Reach one. The light that reaches one of the first to fourth light leakage prevention layers 110, 111, 112, and 113 is absorbed by the light leakage prevention layer that has reached. As described above, the light emitted from other subpixels or other pixels is absorbed by the light leakage prevention layer, thereby suppressing the light leakage phenomenon of the organic light emitting display device including a plurality of microlenses. There is.

  On the other hand, the first to fourth light leakage prevention layers 110, 111, 112, and 113 according to the present embodiment have characteristics that allow light of a specific wavelength to pass therethrough and absorb the remaining wavelength light. The fourth light leakage prevention layers 110, 111, 112, and 113 can transmit light having a specific wavelength among light leakage components and can absorb light having the remaining wavelength. For example, when the fourth light leakage prevention layer 113 that transmits blue (B) light is disposed in the fourth subpixel SP4, if the light leakage component has a wavelength of blue (B) light, the fourth subpixel SP4 transmits light. In the case of light having a wavelength other than blue (B) light, the light can be absorbed by the fourth light leakage prevention layer 113. In this case, blue light can be emitted to the fourth sub-pixel SP4, and in the case of a display device with low efficiency of blue (B) light, blue (B) can be compensated thereby.

  In addition, at least two light leakage prevention layers among the first to fourth light leakage prevention layers 110, 111, 112, and 113 can transmit light of the same color. For example, the first light leakage prevention layer 110, the second light leakage prevention layer 111, and the third light leakage prevention layer 112 transmit light of different colors, and the fourth light leakage prevention layer 113 Light of the same color as that of one of the first to third light leakage prevention layers 110, 111, 112 can be transmitted.

  More specifically, the first light leakage prevention layer 110 transmits red (R) light, the second light leakage prevention layer 111 transmits green (G) light, and the third light leakage prevention layer 112 is blue. (B) In the case of transmitting light, the fourth light leakage prevention layer 113 can transmit light of any color of red (R), green (G), and blue (B). However, the fourth light leakage prevention layer 113 is thinner than the first to third light leakage prevention layers 110, 111, and 112, so that red (R), green (G), or blue (B ) As well as any one of the colors of the light in the visible light range. At this time, the transmittance of the first to third light leakage prevention layers 110, 111, 112 to a specific wavelength may be 60% or more. Further, the light transmittance of the fourth light leakage prevention layer 113 to a wavelength in the visible light region may be 60% or more. On the other hand, the first to third light leakage prevention layers 110, 111, and 112 can absorb the light of the remaining colors except for the light of the transmitted color.

  Here, the first light leakage prevention layer 110 and the fourth light leakage prevention layer 113 transmit the same color light, and the light leakage component generated in the second subpixel SP1 or the third subpixel is the first light leakage component. In the case of proceeding to the fourth sub-pixel SP4, the light leakage component is absorbed by the fourth light leakage prevention layer 113, thereby preventing light leakage between different sub-pixels or different pixels. . Further, since the fourth light leakage prevention layer 113 is made thinner than the first to third light leakage prevention layers 110, 111, and 112, the fourth subpixel SP4 has visible light. The transmittance of light in the wavelength region may be relatively high. That is, the fourth subpixel SP4 includes the thin fourth light leakage prevention layer 113, thereby preventing light leakage and simultaneously ensuring high light transmittance as compared with other subpixels.

  Further, when the green (G) or blue (B) light leakage component generated in the second subpixel SP2 or the third subpixel SP3 proceeds to the fourth subpixel SP4, the fourth light leakage prevention layer. Since 113 absorbs green (G) or blue (B) light, the light leakage phenomenon can be prevented. At this time, the fourth light leakage prevention layer 113 can absorb light generated in the second subpixel SP2 or the third subpixel SP3 by transmitting only red (R) light.

  In addition, the first light leakage prevention layer 110 absorbs green (G) and blue (B) light leakage components generated in the second subpixel SP2 and the third subpixel SP3. The leakage prevention layer 111 absorbs red (R) and blue (B) light leakage components generated in the first subpixel SP1 and the third subpixel SP3, and the third light leakage prevention layer 112 Red (R) and green (G) light leakage components generated in the first and second subpixels can be absorbed.

  As described above, the configuration in which the fourth light leakage prevention layer 113 transmits light of the same color as that of the first light leakage prevention layer 110 has been exemplified. However, the organic light emitting display according to the first embodiment of the present invention is not limited to this. However, the fourth light leakage prevention layer 113 can transmit light of the same color as the second or third light leakage prevention layer (111, 112).

  As described above, the light emitted from other subpixels or other pixels is absorbed by the light leakage prevention layer, thereby suppressing the light leakage phenomenon of the organic light emitting display device including a plurality of microlenses. There is.

  The first to fourth light leakage prevention layers 110, 111, 112, and 113 are not limited thereto, and at least one of the first to fourth light leakage prevention layers 110, 111, 112, and 113 is used. One light leakage prevention layer can transmit light of a complementary color of the light transmitted by the other light leakage prevention layers.

  For example, the first light leakage prevention layer 110, the second light leakage prevention layer 111, and the third light leakage prevention layer 112 transmit light of different colors, and the fourth light leakage prevention layer 113 Light of a complementary color of one of the first to third light leakage prevention layers 110, 111, and 112 can be transmitted.

  Specifically, the fourth light leakage prevention layer 113 can transmit light having a wavelength corresponding to a complementary color of green (G). That is, the fourth light leakage prevention layer 113 can transmit light having a wavelength corresponding to (0.35, 0.1) to (0.55, 3) in the 1931 CIE-xy primary color system. .

  Accordingly, the fourth light leakage prevention layer 113 absorbs red (R), green (G), and blue (B) light leakage components generated from the first to third subpixels SP1, SP2, and SP3. By doing so, the light leakage phenomenon between different subpixels or between different pixels can be suppressed. In particular, the fourth light leakage prevention layer 113 transmits light having a wavelength corresponding to (0.35, 0.1) to (0.55, 3) in the 1931 CIE-xy primary color system. In 1931 CIE-xy color system, light leakage is minimized by absorbing light of the remaining colors excluding colors corresponding to (0.35, 0.1) to (0.55, 3). be able to.

  In addition, the fourth light leakage prevention layer 113 transmits light having a wavelength corresponding to (0.35, 0.1) to (0.55, 3) in the 1931 CIE-xy color system. Accordingly, it is possible to suppress a loss of light emitted from the organic light emitting element EL arranged in the fourth subpixel SP4. In particular, by minimizing the absorption of low-efficiency blue (B) light and red (G) light, the fourth light leakage prevention layer 113 allows the light efficiency of the organic light-emitting element to be reduced in the fourth subpixel SP1. Inferiority can be prevented.

  As described above, the fourth light leakage prevention layer 113 of the organic light emitting display device according to the first embodiment of the present invention exemplifies a configuration that transmits light having a wavelength corresponding to a complementary color of green (G). The fourth light leakage prevention layer 113 of the organic light emitting display device according to the first embodiment of the present invention is not limited to this, and the wavelength light corresponding to the complementary color of red (R) or the complementary color of blue (B). Can also be transmitted.

  As described above, the organic light emitting display according to the first embodiment of the present invention corresponds to the light emitting areas EA11, EA21, EA31, and EA41 in the first to fourth subpixels SP1, SP2, SP3, and SP4. By arranging the first to fourth light leakage prevention layers 110, 111, 112, and 113 in the region, it is possible to suppress the light leakage phenomenon that occurs between different subpixels or between different pixels. effective.

  In addition, in the organic light emitting display device according to the first embodiment of the present invention, the fourth light leakage prevention layer 113 is a 1931 CIE-xy color system (0.35, 0.1) to (0.55, By transmitting light having a wavelength corresponding to 3), light leakage occurring between different subpixels or between different pixels is suppressed, and the efficiency of light emitted from the organic light emitting device is inferior. There is an effect that can be prevented.

  Next, referring to FIG. 4 and FIG. 5, the organic light emitting display device according to the second embodiment of the present invention is considered as follows. FIG. 4 is a plan view of an organic light emitting display device according to a second embodiment of the present invention.

  The OLED display according to the second exemplary embodiment of the present invention may include the same components as those of the above-described exemplary embodiments. The description which overlaps with embodiment mentioned above can be abbreviate | omitted. Moreover, the same structure has the same code | symbol.

  Referring to FIG. 4, the organic light emitting display device according to the second embodiment of the present invention has a microlens shape disposed in at least one light emitting region when compared with the organic light emitting display device according to the first embodiment. There are differences in the differences.

  Specifically, the first to fourth subpixels include a first light emitting area EA11, a second light emitting area EA21, a third light emitting area EA32, and a fourth light emitting area EA41, respectively. The microlenses arranged in at least one of the four light emitting areas (EA11, EA21, EA32, EA41) may be formed to have different shapes.

  In FIG. 4, a first microlens is disposed in the first light emitting area EA11, the second light emitting area EA21, and the fourth light emitting area EA41, and a second microlens is disposed in the third light emitting area EA32. Is placed. At this time, the first microlens and the second microlens may be different from each other.

  Specifically, the first microlens is connected to the first concave portion 201 and the first concave portion 201 that couples the first concave portion 201 to be adjacent to the first concave portion 201. Composed. The second microlens includes a second concave portion 301 and a second coupling portion that couples the second concave portion 301 to be adjacent to the second concave portion 301. Is done.

  At this time, the diameter (D (Diameter)), height (H (Height)), full width at half maximum (F (Full Width Half Max)) of the first concave portion 201 and the second concave portion 301, the concave portion and the concave portion There may be a difference between at least one of a separation distance (G (Gap)), a slope (S (Slope)), and an aspect ratio (A / R (Aspect Ratio)). On the other hand, the full width at half maximum (F) means a length between two concave portions at a half of the height. The aspect ratio (A / R) means a value obtained by dividing the height (H) of the recess by the radius (D / 2) of the recess.

  4 and 5 disclose a configuration in which the diameter D2 of the second recess 301 of the second microlens is smaller than the diameter D1 of the first recess 201 of the first microlens. The second embodiment according to the present invention is not limited to this, and a configuration in which the shapes of the first recess 201 and the second recess 301 are different is sufficient.

  This structure will be described in detail with reference to FIG. 5 as follows. FIG. 5 is a cross-sectional view taken along the line CD of the organic light emitting display device according to the second embodiment of the present invention. Referring to FIG. 5, in the first light emitting area EA11, the second light emitting area EA21, and the fourth light emitting area EA41, first microlenses having the same shape are arranged. A second microlens different from the first microlens is disposed in the third light emitting area EA32.

  At this time, the diameter D2 of the second recess 301 of the second microlens can be smaller than the diameter D1 of the first recess 201 of the first microlens. On the other hand, since the change in the light path due to the shape of the concave portion of the microlens inserted in the overcoat layer 120 in order to improve the external light extraction efficiency is the main factor for improving the light extraction efficiency, The light efficiency can vary depending on the diameter (D).

  Specifically, the diameter D2 of the second concave portion 301 of the second microlens disposed in the third light emitting area EA32 is set to the first light emitting area EA11, the second light emitting area EA21, and the fourth light emitting area EA41. The number of times the light emitted from the organic light emitting element EL in the third light emitting area EA32 hits the third microlens structure by being smaller than the diameter D2 of the first recess 201 of the first microlens to be arranged. Can be increased. Therefore, there is an effect that the light extraction efficiency can be further improved in the subpixel in which the low-efficiency organic light-emitting element EL is disposed.

  In addition, the first to fourth light leakage prevention layers 110, 111, 112, and 113 are disposed in the first to fourth subpixels SP1, SP2, SP3, and SP4, respectively, so that different subpixels can be used. There is an effect that the light leakage phenomenon between different pixels can be prevented.

  Next, an organic light emitting display device according to the third embodiment of the present invention will be described with reference to FIGS. 6 and 7 as follows. FIG. 6 is a plan view of an organic light emitting display device according to a third embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line EF of the organic light emitting display device according to the third embodiment of the present invention.

  The organic light emitting display device according to the third embodiment of the present invention may include the same components as those of the previously described embodiments. The description overlapping with the above-described embodiment can be omitted. Moreover, the same structure has the same code | symbol.

  Referring to FIGS. 6 and 7, the organic light emitting display according to the third embodiment of the present invention includes at least one of four light emitting areas EA11, EA21, EA33, and EA42 included in one pixel (P). The two light emitting regions can include a light leakage prevention layer non-arranged region. In addition, at least one of the four light emitting areas EA11, EA21, EA33, and EA42 may include a micro non-arranged area.

  For example, the first light emission area EA11 and the second light emission area EA21 include a light leakage prevention layer, and the third light emission area EA33 and the fourth light emission area EA42 may not include a light leakage prevention layer. Further, the first light emitting area EA11 and the second light emitting area EA21 include microlenses, and the third light emitting area EA33 and the fourth light emitting area EA42 do not need to include microlenses. That is, the light emitting region including the light leakage prevention layer non-arranged region may not include the microlens.

  In addition, the organic light emitting display device according to the third embodiment of the present invention is not limited thereto, and the light emitting region including the light leakage prevention layer may not include the microlens.

  Specifically, the first light emission area EA11 and the second light emission area EA21 include a first light leakage prevention layer 110 and a second light leakage prevention layer 111, respectively. On the other hand, the third light emitting area EA33 and the fourth light emitting area EA42 do not include the light leakage prevention layer.

  In the first light emitting area EA11 and the second light emitting area EA21, the overcoat layer 220 includes microlenses having the same shape. Further, in the third light emitting area EA33 and the fourth light emitting area EA42, the overcoat layer 220 may not include a microlens.

  That is, the overcoat layer 220 may be flat in the third light emitting area EA33 and the fourth light emitting area EA42. Accordingly, the first electrode 230, the organic light emitting layer 240, and the second electrode 250 disposed on the third light emitting area EA33 and the fourth light emitting area EA42 can also be formed flat.

  Here, the light leakage prevention layer and the microlens are not disposed in the fourth light emitting area EA42. In this way, in the fourth subpixel SP4 that is most vulnerable to light leakage, since no microlens is provided, light leakage components generated in subpixels that emit different colors are arranged in the fourth subpixel SP4. It is possible to prevent a phenomenon that the microlens is taken out and visually recognized.

  As described above, since no microlens is disposed in the fourth subpixel SP4 and the light leakage phenomenon can be prevented, the configuration of the light leakage prevention layer may be omitted in the fourth subpixel SP4. it can.

  6 and 7 disclose a configuration in which the light leakage prevention layer and the microlens are not arranged in the third light emitting area EA33, the organic light emitting display device according to the third embodiment of the present invention has the same structure. The microlens and the light leakage prevention layer are disposed not only in the fourth subpixel SP4 but also in at least one of the first to third subpixels SP1, SP2, and SP3. You can not.

  Thereby, not only the fourth subpixel SP4 but also other subpixels vulnerable to light leakage can prevent light acting on the light leakage from being taken out by the microlens.

  Next, an organic light emitting display device according to the fourth embodiment of the present invention will be described with reference to FIGS. 8 and 9 as follows. FIG. 8 is a plan view of an organic light emitting display device according to a fourth embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line GH of the organic light emitting display device according to the fourth embodiment of the present invention.

  The OLED display according to the fourth exemplary embodiment of the present invention may include the same components as those of the above-described exemplary embodiments. The description overlapping with the above-described embodiment can be omitted. Moreover, the same structure has the same code | symbol.

  Referring to FIGS. 8 and 9, the OLED display according to the fourth exemplary embodiment of the present invention has one pixel (P) when compared with the OLED display according to the third exemplary embodiment of the present invention. Microlenses are arranged in at least two of the light emitting areas EA12, EA21, EA33, EA42 included. At this time, there is a difference that the shape of the microlens arranged in at least one light emitting region is different from the shape of the microlens arranged in different light emitting regions.

  In detail, the first to fourth subpixels include a first light emitting area EA11, a second light emitting area EA21, a third light emitting area EA33, and a fourth light emitting area EA42, respectively. Microlenses are arranged in at least two of the light emitting areas EA12, EA21, EA33, and EA42, and the shapes of the microlenses arranged in the two light emitting areas can be different from each other. The light leakage prevention layer and the microlens can be prevented from being disposed in at least one light emitting region.

  For example, a second microlens is disposed in the first light emitting area EA12, a first microlens is disposed in the second light emitting area EA21, and the third light emitting area EA33 and the fourth light emitting area. The EA 42 may not be provided with a micro lens. At this time, the shapes of the first microlens and the second microlens may be different.

  Specifically, the diameter D2 of the second recess 301 of the second microlens arranged in the first light emitting area EA12 can be larger than the diameter D1 of the first recess 201 of the first microlens. Accordingly, the first light emitting area EA12 having the second microlens may include more microlenses per unit area than the second light emitting area EA21 having the first microlens.

  As described above, by providing a larger number of microlenses in the first light emitting area EA12 in which the organic light emitting elements having lower efficiency than the second light emitting area EA21 are arranged, the organic light emitting elements 330, 340, 350 are provided. There is an increased probability that the light emitted from the light hits the microlens, thereby increasing the light emission efficiency in the first light emitting area EA12 and reducing the power consumption.

  Next, an organic light emitting display device according to the fifth embodiment of the present invention will be described with reference to FIGS. 10 and 11 as follows. FIG. 10 is a plan view of an organic light emitting display device according to a fifth embodiment of the present invention. FIG. 11 is a cross-sectional view taken along line IJ of the organic light emitting display device according to the fifth embodiment of the present invention.

  The OLED display according to the fifth exemplary embodiment of the present invention may include the same components as those of the above-described exemplary embodiments. The description overlapping with the above-described embodiment can be omitted. Further, the same components have the same reference numerals.

  Referring to FIGS. 10 and 11, the organic light emitting display device according to the fifth embodiment of the present invention includes at least three of the plurality of light emitting areas EA12, EA21, EA34, and EA42 included in one pixel (P). A microlens is formed on the overcoat layer 420 in one light emitting region.

  At this time, the shape of the microlens disposed in at least one light emitting region may be different from the shape of the microlens disposed in the remaining light emitting region. The shape of the microlens arranged in at least one light emitting area is the same as that of the microlens arranged in any one of the microlenses arranged in the remaining light emitting areas. Can.

  In addition, the microlenses are not arranged in the remaining light emitting areas except the light emitting areas where the microlenses of the plurality of light emitting areas EA12, EA21, EA34, and EA42 included in one pixel (P) are arranged. Also good.

  For example, respective microlenses can be disposed in the first light emitting area EA12, the second light emitting area EA21, and the third light emitting area EA34. Further, it is possible to prevent the microlens from being arranged in the fourth light emitting area EA42.

  Here, in the first light emitting area EA12, the second light emitting area EA21, and the third light emitting area EA34, a second microlens, a first microlens, and a third microlens are disposed, respectively. be able to. At this time, the shapes of the first to third microlenses can be different from each other.

  Specifically, the diameter D1 of the first recess 201 of the first microlens is larger than the diameter D2 of the second recess 301 of the second microlens, and the second recess 301 of the second microlens 301 has a diameter D1. The diameter D2 can be larger than the diameter D3 of the third recess 401 of the third microlens.

  Accordingly, the number of microlenses arranged per unit area of the third light emitting area EA34 is larger than the number of microlenses arranged per unit area of the second light emitting area EA21, and the unit in the second light emitting area EA21. The number of microlenses arranged per area may be larger than the number of microlenses arranged per unit area of the first light emitting area EA12.

  Accordingly, the probability that the light emitted from the organic light emitting devices 430, 440, and 450 in the third light emitting area EA34 can hit the microlens is higher in the first light emitting area EA12 and the second light emitting area EA21. The probability that the light emitted from the organic light emitting elements 430, 440, and 450 in the first light emitting area EA12 can hit the microlens is higher than that in the second light emitting area EA21.

  That is, the organic light emitting display device according to the fifth embodiment of the present invention has a light efficiency in units of light emitting regions by changing the shape of the microlens according to the efficiency of the organic light emitting elements disposed in each light emitting region. There is an effect that can be improved.

  10 and 11, the diameters of the first concave portion 201, the second concave portion 301, and the third concave portion 401 of the first microlens, the second microlens, and the third microlens are different from each other. Although the configuration is shown, the present invention is not limited to this, and it is sufficient if at least one of the diameter, the height, the full width at half maximum, the separation distance between the recess and the recess, the inclination, or the aspect ratio is different. It is.

  Next, an organic light emitting display device according to the sixth embodiment of the present invention will be described with reference to FIGS. 12 and 13 as follows. FIG. 12 is a plan view of an organic light emitting display device according to a sixth embodiment of the present invention. FIG. 13 is a cross-sectional view taken along the line KL of the organic light emitting display device according to the sixth embodiment of the present invention.

  The OLED display according to the sixth exemplary embodiment of the present invention may include the same components as those of the above-described exemplary embodiments. The description overlapping with the above-described embodiment can be omitted. Further, the same components have the same reference numerals.

  Referring to FIGS. 12 and 13, the organic light emitting display device according to the sixth embodiment of the present invention is the first of the plurality of light emitting areas EA11, EA22, EA31, EA41 included in one pixel (P). The microlenses may be disposed in the light emitting area EA11, the third light emitting area EA31, and the fourth light emitting area EA41, respectively, and the microlenses may not be disposed in the second light emitting area EA22.

  At this time, the first light leakage prevention layer 110, the second light leakage prevention layer 111, and the third light leakage prevention layer 112 are formed on the substrate 100 in regions corresponding to the light emitting regions EA11, EA22, EA31, and EA41. In addition, a fourth light leakage prevention layer 113 may be disposed.

  When the organic light emitting elements 530, 540, and 550 that emit green (G) are disposed in the second light emitting area EA22, the first light emitting area EA11 and the third light emitting efficiency are lower than those of the second light emitting area EA22. By arranging a plurality of microlenses in the light emitting area EA31 and the fourth light emitting area EA41, there is an effect that the light efficiency can be improved.

  Next, an organic light emitting display device according to the sixth embodiment of the present invention will be described with reference to FIGS. 14 and 15 as follows. FIG. 14 is a plan view of an organic light emitting display device according to a seventh embodiment of the present invention. FIG. 15 is a cross-sectional view taken along line MN of the organic light emitting display device according to the seventh embodiment of the present invention.

  The organic light emitting display device according to the seventh embodiment of the present invention may include the same components as those of the above-described embodiment. The description overlapping with the above-described embodiment can be omitted. Moreover, the same structure has the same code | symbol.

  First, referring to FIG. 14, in the organic light emitting display device according to the seventh embodiment of the present invention, microlenses are arranged in a plurality of light emitting areas EA11, EA22, EA31, and EA43 included in one pixel (P). Is done. In addition, a light leakage prevention layer may be disposed under the overcoat layer 320 including microlenses in the subpixels included in one pixel (P).

  On the other hand, the light leakage prevention layer disposed in at least one subpixel in one pixel (P) is made of the material of the light leakage prevention layer disposed in the remaining other subpixels and other materials. Can do. Thereby, the reflectance of a specific subpixel can be reduced and the light leakage phenomenon can be reduced.

  A study of such a configuration with reference to FIG. 15 is as follows. Referring to FIG. 15, the organic light emitting display device according to the seventh embodiment of the present invention provides a fourth light leakage arranged in at least one subpixel among a plurality of subpixels included in one pixel. The prevention layer 210 may be made of a material that reflects light. The first to third light leakage prevention layers 110, 111, and 112 arranged in the remaining subpixels among the plurality of subpixels included in one pixel are red (R) and green (G). , Blue (B) light of any color can be transmitted.

  Specifically, the insulating layer 200 is disposed on the substrate 100 of the organic light emitting display device. In addition, on the insulating layer 200, the first to third light leakage prevention layers 110, 111, 112 are provided in regions corresponding to the light emitting regions EA11, EA21, EA1, EA43 of the subpixels SP1, SP2, SP3, SP4. , 210 are arranged. At this time, the first to third light leakage prevention layers 110, 111, and 112 disposed in the first to third subpixels SP1, SP2, and SP3 are respectively red (R) and green ( G) or blue (B) light of any color can be transmitted. Further, the fourth light leakage prevention layer 210 disposed in the fourth subpixel SP4 can reflect light.

  On the other hand, the fourth light leakage prevention layer 210 disposed in the fourth subpixel SP4 may include at least two layers. Specifically, the fourth light leakage prevention layer 210 disposed in the fourth subpixel SP3 is disposed on the first metal layer 211 and the first metal layer 211 disposed on the insulating layer 200. A second metal layer 212. Here, the insulating layer 200 may be an inorganic insulating layer such as silicon oxide (SiO 2) or silicon nitride (SiN x), but the present embodiment is not limited thereto.

  As described above, the fourth subpixel SP4 is provided with the fourth light leakage prevention layer 210 made of at least two metal layers, so that the remaining subpixels excluding the fourth subpixel SP4 are disposed. The light leakage component generated in the step is reflected by the first metal layer 211 or the second metal layer 212, the path is switched in the direction of the substrate 100, and reaches a polarizing plate (not shown) disposed below the substrate 100. can do.

  Here, the optical axis of the light leakage component reflected by the first metal layer 211 or the second metal layer 212 and whose path is switched is switched differently from the optical axis of the polarizing plate (not shown), and the substrate It is not taken out of the outside of 100 but is confined in the display device. That is, by confining the light leakage component whose path is switched by the first metal layer 211 or the second metal layer 212 in the display device, the viewer may not see the light leakage.

  In other words, when the fourth light leakage prevention layer 210 is not disposed in the fourth subpixel SP4, the light leakage component generated in different subpixels is at the boundary between the substrate 100 and the polarizing plate (not shown). The light can reach the microlens of the fourth subpixel SP4 by switching. At this time, the light that reaches the microlens is taken out by the microlens and emitted to the outside of the substrate 100 to cause a light leakage phenomenon. That is, the optical axis of the light reaching the microlens may be the same as the optical axis of the polarizing plate (not shown) by the microlens, so that the light is taken out of the substrate 100 and light leakage is visually recognized by the viewer. Can be done.

  In addition, when external light 850 incident from the outside of the substrate 100 is incident on the fourth subpixel SP4, the external light 850 is reflected by the first metal layer 211 or the second metal layer 212, and the external light 850 is reflected. Can be switched again in the direction of the first substrate 100. On the other hand, since the optical axis of the external light 850 changes in the process in which the external light 850 is reflected by the first metal layer 211 or the second metal layer 212, a polarizing plate (not shown) disposed on the back surface of the substrate 100. ) Will not pass. Therefore, there is an effect that the reflectance of the external light 850 can be lowered so that the external light 850 does not leak outside the display device.

  The first metal layer 211 may be made of a material having a negative permittivity. In addition, the absolute value of the dielectric constant of the first metal layer 211 may be larger than the absolute value of the dielectric constant of the insulating layer 200.

  The first metal layer 211 can be made of an alkaline earth metal having a negative dielectric constant and an absolute value of the dielectric constant larger than the absolute value of the dielectric constant of the insulating layer 200. The material of the first metal layer 211 according to the form is not limited thereto. For example, the first metal layer 211 includes beryllium (Be), calcium (Ca), barium (Ba), strontium (Sr), radium (Ra), lithium (Li), sodium (having a negative dielectric constant). Na) or magnesium (Mg).

  A second metal layer 212 made of a metal material is disposed on the first metal layer 211. At this time, the second metal layer 212 may be made of at least one of silver (Ag), aluminum (Al), and gold (Au).

  On the other hand, when light is incident on the boundary between the insulating layer and the metal layer having a high dielectric constant, the light incident on the metal layer is absorbed, and most of the light is lost due to the non-emitting plasmon mode. , The transmittance may decrease. Here, the non-light-emitting plasmon mode includes the vibration of the surface electrons of the metal from the surface of the metal layer serving as a reflector, the loss due to interference of the wavelength of the emitted light from the organic light emitting element, and the absorption of the metal layer. It is a mode that appears. That is, when the insulating layer and the metal layer serving as a reflector are arranged so as to be in contact with each other, a phenomenon occurs in which light is lost at the interface between the insulating layer and the metal layer and the transmittance is lowered.

  In contrast, the fourth subpixel SP4 has a negative dielectric constant between the insulating layer 200 and the second metal layer 212, and the absolute value of the dielectric constant is the absolute value of the dielectric constant of the insulating layer 200. By disposing the first metal layer 211 that is larger than the value, the amount of light lost can be reduced, and the transmittance of the fourth subpixel SP4 can be improved. Therefore, the light emitted from the organic light emitting element EL can be extracted outside the substrate 100 through the fourth light leakage prevention layer 210 including the first metal layer 211 and the second metal layer 212. .

  Specifically, since the first metal layer 211 has a negative dielectric constant, the refractive index of the first metal layer 211 can have a negative value. More specifically, the refractive index can be expressed by the square root of the product of permittivity and permeability, but the first metal layer 211 has a negative permittivity, so the first metal The refractive index of the layer 211 may also be a sound value.

  On the other hand, a substance having a negative refractive index transmits light without reflecting or absorbing incident light. In addition, the thickness of the first metal layer 211 and the second metal layer 212 can be extremely reduced. For example, the thickness of the first metal layer 211 and the second metal layer 212 may be 1 nm to 30 nm. Thus, the transmittance of the fourth light leakage prevention layer 210 can be improved by reducing the thickness of the first metal layer 211 and the second metal layer 212.

  When the light emitted from the organic light emitting element EL reaches the second metal layer 212 of the fourth light leakage prevention layer 210 via the overcoat layer 320, a part of the light is transmitted by the second metal layer 212. Although reflected, the remaining part of the light passes through the second metal layer 212 and reaches the first metal layer 211. Further, as described above, the first metal layer 211 does not reflect or absorb light, and the light can pass through the first metal layer 211 and be extracted outside the first substrate 100.

  That is, the light leakage component and the reflectivity are transmitted through the insulating layer 200 disposed on the substrate 100 in the fourth subpixel SP4, the first metal layer 211 and the second metal layer 212 disposed on the insulating layer 200. This has the effect of reducing and improving the transmittance of light emitted from the organic light emitting device EL.

  On the other hand, the arrangement structure of the insulating layer 200 and the fourth light leakage prevention layer 210 arranged in the fourth subpixel SP4 is not limited to the above-described structure.

  Referring to FIG. 16, the arrangement structure of the insulating layer and the fourth light leakage prevention layer of the fourth subpixel according to another embodiment will be described as follows. FIG. 16 is a diagram illustrating an arrangement structure of an insulating layer and a fourth light leakage prevention layer of the fourth subpixel according to another embodiment.

  Referring to FIG. 16, in the display device according to another embodiment, the first to third subpixels SP1, SP2, and SP3 include an insulating layer 300 on the substrate 100, and the first to third subpixels SP1, SP2, and SP3. First to third light leakage prevention layers 110, 111, and 112 are disposed.

  An overcoat layer 420 including microlenses is disposed on the first to third light leakage prevention layers 110, 111, and 112 disposed in the first to third subpixels SP1, SP2, and SP3, respectively. In addition, an organic light emitting element EL including a first electrode 430, an organic light emitting layer 440, and a second electrode 450 is disposed on the overcoat layer 420.

  In addition, a fourth light leakage prevention layer 310 is disposed on the substrate 100 in the fourth subpixel SP4. At this time, the fourth light leakage prevention layer 310 includes a third metal layer 311 and a fourth metal layer 312. On the fourth metal layer 312, an insulating layer 300 integrated with the insulating layer 300 disposed in the first to third subpixels SP 1, SP 2, SP 3 is disposed. That is, the process of forming the insulating layer 300 on the first to third subpixels SP1, SP2, and SP3 without adding a process to the formation of the insulating layer 300 disposed in the fourth subpixel SP4 is performed simultaneously. Can be formed.

  An overcoat layer 420 provided with microlenses is disposed on the insulating layer 300 of the fourth subpixel SP4, and the first electrode 430, the organic light emitting layer 440, and the second electrode 450 are disposed on the overcoat layer 420. An organic light emitting device EL including the above is disposed. Here, the first electrode 430, the organic light emitting layer 440, and the second electrode 450 disposed in the first to fourth subpixels SP 1, SP 2, SP 3, SP 4 are microlenses provided in the overcoat layer 420. The shape may conform to the morphology.

  On the other hand, each of the third metal layer 311 and the fourth metal layer 312 disposed in the fourth subpixel SP4 may include at least one layer. The third metal layer 311 can be made of a metal material. For example, the third metal layer 311 can be made of at least one of silver (Ag), aluminum (Al), and gold (Au).

  Further, the fourth metal layer 312 may be made of an alkaline earth metal having a negative dielectric constant and an absolute value of the dielectric constant that is larger than the absolute value of the dielectric constant of the insulating layer 300. However, the material of the fourth metal layer 312 is not limited thereto. For example, the fourth metal layer 312 includes beryllium (Be), calcium (Ca), barium (Ba), strontium (Sr), radium (Ra), lithium (Li), sodium (having a negative dielectric constant). Na) or magnesium (Mg).

  Moreover, the thickness of the 30th metal layer 311 and the 4th metal layer 312 can be made very thin. For example, the thicknesses of the third metal layer 311 and the fourth metal layer 312 may be 1 nm to 30 nm. Thus, the transmittance of the fourth light leakage prevention layer 310 can be improved by reducing the thicknesses of the third metal layer 311 and the fourth metal layer 312.

  As described above, in the fourth subpixel SP4, the third metal layer 311 disposed on the substrate 100, the fourth metal layer 312 and the fourth metal layer 312 disposed on the third metal layer 311. There is an effect that the light leakage component and the reflectance can be reduced and the light transmittance emitted from the organic light emitting element EL can be improved through the insulating layer 300 disposed above.

  That is, in the organic light emitting display device according to the present embodiment, the light leakage prevention layer disposed in at least one subpixel includes at least two metal layers, and has a negative dielectric constant and an absolute value of the dielectric constant. It is sufficient if the metal layer made of a substance having a larger value than the absolute value of the insulating layer is arranged between the insulating layer and the highly reflective metal layer.

  Next, the effect of reducing the reflectance of the organic light emitting display device according to the present embodiment and the comparative example is examined as follows. FIG. 17 is a graph showing the effect of reducing the reflectance of the organic light emitting display device according to the present embodiment and the comparative example.

  Referring to FIG. 17, the organic light emitting display device has a negative dielectric constant and the absolute value of the dielectric constant is the same as that in the case where only a metal layer having a high reflectance is disposed in the light leakage prevention layer. A light leakage prevention layer (embodiment) in which a metal layer larger than the absolute value of the dielectric constant of an insulating layer arranged in contact with the leakage prevention layer and a metal layer having a high reflectance is laminated is applied to an organic light emitting display device. A comparison of the reflectance at the time is as follows.

  The x axis in FIG. 17 means an angle at which external light is incident on the organic light emitting display device, and the y axis means the reflectance of the organic light emitting display device. On the other hand, in FIG. 17, the metal layer having high reflectivity uses silver (Ag), has a negative dielectric constant, and the dielectric constant of the insulating layer arranged so that the absolute value of the dielectric constant is in contact with the light leakage prevention layer. The metal layer larger than the absolute value of the rate used calcium (Ca).

  In the case of an organic light emitting display device to which a microlens is applied, when the external light is incident at a high angle (for example, an angle of 40 degrees or more), the external light is diffused by the microlens and can be visually recognized by the viewer. There is. Therefore, as in the above-described embodiment, it is necessary to prevent leakage to the outside of the display device by changing the optical axis of the external light incident on the organic light emitting display device using a light leakage prevention layer or the like. is there.

  However, as shown in FIG. 17, when external light is incident on the organic light emitting display device at a high angle (an angle of 40 degrees or more), a light leakage prevention layer made of only silver (Ag) is applied to 5 nm and 10 nm. Further, it can be seen that the organic light emitting display device according to the comparative example reflects outside light by about 5% to 30%. That is, it can be seen that the ratio of the optical axis of the external light incident on the display device to the optical axis of the polarizing plate is only 5% to 30%.

  In contrast, an organic light emitting display device having a light leakage prevention layer in which 5 nm to 10 nm of calcium (Ca) and silver (Ag) are stacked is 50% to 80% of external light incident at a high angle. You can know to reflect. That is, it can be seen that the ratio of the optical axis of the external light incident on the display device to the optical axis of the polarizing plate is 50% to 80%.

  As described above, in the organic light emitting display device according to the embodiment, the amount of the external light reflected through the light leakage prevention layer is the amount of the external light reflected through the light leakage prevention layer in the organic light emitting display device according to the comparative example. You can know that it is more than the amount. That is, since the amount of external light reflected through the light leakage prevention layer applied to the organic light emitting display device according to the embodiment is large, the optical axis of the external light is different from the optical axis of the polarizing plate. Since the amount of light leaking to the outside is reduced, there is an effect that the external light reflectance can be lowered.

  As described above, the organic light emitting display according to an embodiment of the present invention includes a light leakage prevention layer disposed in a region corresponding to the light emitting region in at least one subpixel of the plurality of subpixels. There is an effect that it is possible to suppress the light leakage phenomenon that occurs between different subpixels or between different pixels and to prevent the efficiency of light emitted from the organic light emitting element from being deteriorated.

  In addition, the organic light emitting display device according to the embodiment of the present invention includes subpixels including different microlenses in pixels composed of a plurality of subpixels, or subpixels in which microlenses are not arranged. Light extraction efficiency can be adjusted for each sub-pixel, and light leakage can be prevented.

  Features, structures, effects, and the like described in the above-described embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, and the like exemplified in each embodiment can be combined with or modified in another embodiment by a person having ordinary knowledge in the field to which the embodiment belongs. Therefore, the contents related to these combinations and modifications should be construed as being included in the scope of the present invention.

  Further, although the embodiment has been mainly described above, this is merely an example and does not limit the present invention. Any person having ordinary knowledge in the field to which the present invention belongs can be used. It will be appreciated that several variations and applications not previously exemplified are possible without departing from the essential characteristics. For example, each component specifically shown in the embodiment can be modified and implemented.

110: first light leakage prevention layer 111: second light leakage prevention layer 112: third light leakage prevention layer 113: fourth light leakage prevention layer 120: overcoat layer 201: first recess 202: first 1 connection

Claims (20)

A substrate divided into a plurality of sub-pixels emitting different colors;
A light leakage prevention layer disposed in at least one subpixel of the plurality of subpixels and transmitting light of a specific wavelength and absorbing the remaining wavelength light;
An overcoat layer including a microlens disposed on a substrate including the light leakage prevention layer and configured by a plurality of concave portions or a plurality of convex portions;
An organic light emitting device disposed on the overcoat layer;
A bank pattern disposed on the overcoat layer and configured to define a light emitting region;
An insulating layer disposed on the substrate;
At least one first metal layer disposed on the insulating layer and disposed on at least one subpixel of the plurality of subpixels; and at least one layer disposed on the first metal layer. A second metal layer ,
An organic light emitting display device, wherein the light leakage prevention layer corresponds to the light emitting region. A substrate divided into a plurality of sub-pixels emitting different colors;
A light leakage prevention layer disposed in at least one subpixel of the plurality of subpixels and transmitting light of a specific wavelength and absorbing the remaining wavelength light;
An overcoat layer including a microlens disposed on a substrate including the light leakage prevention layer and configured by a plurality of concave portions or a plurality of convex portions;
An organic light emitting device disposed on the overcoat layer;
A bank pattern disposed on the overcoat layer and configured to define a light emitting region;
At least one third metal layer disposed on the substrate from the at least one subpixel;
At least one fourth metal layer disposed on the third metal layer;
An insulating layer disposed on the fourth metal layer ,
An organic light emitting display device, wherein the light leakage prevention layer corresponds to the light emitting region. The plurality of sub-pixels are divided into red, green, blue and white sub-pixels;
The first to fourth light leakage prevention layers are disposed in each subpixel, and the thickness of at least one light leakage prevention layer is smaller than the thickness of the other light leakage prevention layers. Or an organic light-emitting display device according to 2; 4. The organic light emitting device according to claim 3 , wherein at least two light leakage prevention layers of the first to fourth light leakage prevention layers include a light leakage prevention layer that transmits light of the same color. Display device. At least one light leakage prevention layer of the first to fourth light leakage prevention layers includes a light leakage prevention layer that transmits light of a color complementary to the light color transmitted by the remaining other light leakage prevention layers. The organic light emitting display device according to claim 3 . The microlens includes a first microlens and a second microlens that is the same as or different from the first microlens,
The second microlens, and being disposed in at least one sub-pixel of the sub-pixels where the first microlens excluding arranged subpixels, according to claim 3 Organic light-emitting display device. The diameter, height, full width at half maximum, slope, aspect ratio of the convex portion of the second microlens, or the separation distance between the convex portion and the convex portion,
The diameter, height, full width at half maximum, inclination, aspect ratio, or separation distance between the convex portions of the first microlens is different from each other. 6. The organic light emitting display device according to 6 . The diameter, height, full width at half maximum, inclination, aspect ratio of the concave portion of the second microlens, or the separation distance between the concave portion and the concave portion,
Diameter of the recess of the first micro lens, height, full width at half maximum, the slope, at least one of the magnitude of the separation between the aspect ratio or recess and the recess are different from each other, according to claim 6 Organic light-emitting display device. A third microlens disposed in at least one of the subpixels excluding the subpixel in which the first microlens and the second microlens are respectively disposed;
The third microlens is the same as or different from the first microlens and the second microlens of the first microlens and the second microlens. The organic light emitting display device according to claim 6 . The diameter, height, full width at half maximum, inclination, aspect ratio, or separation distance between the convex portions of the third microlens is as follows:
The first microlens and the second microlens have different diameters, heights, full widths at half maximum, inclinations, aspect ratios, or at least one of the separation distances between the convex parts. The organic light emitting display device according to claim 9 . The diameter, height, full width at half maximum, inclination, aspect ratio of the concave portion of the third microlens, or the separation distance between the concave portion and the concave portion,
The first microlens and the second microlens are different in at least one of a diameter, a height, a full width at half maximum, an inclination, an aspect ratio, or a separation distance between the recess and the recess. The organic light emitting display device according to claim 9 . The plurality of sub-pixels are divided into red, green, blue and white sub-pixels;
The organic light emitting display of a subpixel according to claim 1 or 2 , wherein the at least one subpixel is not provided with a light leakage prevention layer. The organic light emitting display device according to claim 12 , wherein the subpixel in which the light leakage prevention layer is not disposed is a subpixel in which a microlens is not disposed. The organic light emitting display device according to claim 13 , wherein the subpixel in which the light leakage prevention layer and the microlens are not disposed is a white subpixel. 3. The organic light emitting display device according to claim 1, wherein at least one subpixel of the plurality of subpixels is a subpixel in which a microlens is not disposed. The first metal layer has a negative dielectric constant,
The organic light emitting display device according to claim 1 , wherein an absolute value of a dielectric constant of the first metal layer is larger than an absolute value of a dielectric constant of the insulating layer. The second metal layer is made of at least one of silver (Ag), aluminum (Al), and gold (Au),
The first metal layer includes at least beryllium (Be), calcium (Ca), barium (Ba), strontium (Sr), radium (Ra), lithium (Li), sodium (Na), or magnesium (Mg). The organic light emitting display device according to claim 1, comprising any one of the above. In the remaining subpixels excluding the at least one subpixel,
An insulating layer disposed on the substrate and a light leakage prevention layer disposed on the insulating layer;
The organic light emitting display device according to claim 2 , wherein the insulating layer disposed on the at least one sub-pixel and the insulating layer disposed on the remaining sub-pixel are integrated. The dielectric constant of the fourth metal layer is a negative value,
The organic light emitting display device according to claim 2 , wherein an absolute value of a dielectric constant of the fourth metal layer is larger than an absolute value of a dielectric constant of the insulating layer. The third metal layer is made of at least one of silver (Ag), aluminum (Al), and gold (Au),
The fourth metal layer includes at least beryllium (Be), calcium (Ca), barium (Ba), strontium (Sr), radium (Ra), lithium (Li), sodium (Na), or magnesium (Mg). The organic light-emitting display device according to claim 2 , comprising any one of them.

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