Organic light emitting display panel

Abstract

The application discloses an organic light-emitting display panel. A first groove is arranged on the side of a pixel definition part away from a substrate, a part of an isolation column is arranged in the first groove, and another part of the isolation column extends to the outside of the first groove in the direction away from the substrate, so that the organic functional layer covering the isolation column is disconnected from the organic functional layer covering the pixel definition part. The isolation column can disconnect the organic functional layer covering the upper surface of the isolation column from the organic functional layer covering the pixel definition part, prevent the current in the lighted sub-pixel from flowing into another sub-pixel with a different light-emitting color in the transverse direction, prevent the mis-lighting of the adjacent sub-pixel which does not need to be lighted with other light-emitting colors, and avoid the display abnormality of the organic light-emitting display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an organic light emitting display panel. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display devices are widely used due to low power consumption, fast response speed, wide viewing angle, self-luminous, and flexible implementation. There is a horizontal leakage current between adjacent sub-pixels of a conventional organic light emitting display panel. When a sub-pixel of a certain light emitting color is lighted, the horizontal leakage current will flow into adjacent sub-pixels of other light emitting colors, so that adjacent sub-pixels of other light emitting colors which do not need to be lighted are mistakenly lighted, resulting in display abnormalities of the organic light emitting display panel. SUMMARY

[0003] Embodiments of the present application provide an organic light emitting display panel to improve the problem of display abnormalities of the organic light emitting display panel.

[0004] In a first aspect, embodiments of the present application provide an organic light emitting display panel, comprising:

[0005] a substrate;

[0006] an organic planarization layer, disposed on the substrate;

[0007] a pixel definition layer, disposed on a surface of the organic planarization layer away from the substrate, the pixel definition layer comprising a plurality of pixel definition portions arranged at intervals, and a first groove being disposed on a side of the pixel definition portion away from the substrate;

[0008] an isolation column, a part of the isolation column being disposed in the first groove, and another part of the isolation column extending to the outside of the first groove in a direction away from the substrate;

[0009] an organic functional layer, disposed on a side of the pixel definition layer away from the substrate, a part of the organic functional layer covering the isolation column, and a part of the organic functional layer covering the pixel definition portion.

[0010] Further, a ratio of a depth of the first groove to a height of the isolation column is not greater than 0.5.

[0011] Further, a ratio of a width of the first groove to a width of the isolation column ranges from 1.5 to 3.

[0012] Further, the isolation column comprises a first surface, a second surface, and a side surface, the distance from the first surface to the substrate is greater than the distance from the second surface to the substrate, the side surface is located between the first surface and the second surface, the included angle between the first surface and the side surface is less than 90 degrees, and the included angle between the second surface and the side surface is greater than 90 degrees.

[0013] Further, the area of the first surface is greater than the area of the second surface.

[0014] Further, the organic light-emitting display panel further comprises an inorganic encapsulation layer covering the organic functional layer and a part of the isolation column.

[0015] The connecting part between the first surface and the side surface protrudes in the direction away from the substrate, and the surface at the connection between the first surface and the side surface is an arc-shaped convex surface.

[0016] Further, the connecting part between the second surface and the side surface is recessed in the direction toward the substrate, and the surface at the connection between the second surface and the side surface is an arc-shaped concave surface.

[0017] Further, the area of the opening of the first groove away from the substrate is greater than the area of the opening of the side of the first groove close to the substrate.

[0018] Further, the organic planar layer is provided with a second groove on the side away from the substrate, and a part of the organic planar layer fills the second groove.

[0019] In the top view of the organic light-emitting display panel, the isolation column is located in the second groove.

[0020] Further, the material of the isolation column is a negative photoresist material.

[0021] The beneficial effects of the present application are as follows:

[0022] The application provides an organic light-emitting display panel, by arranging a first groove on the side of the pixel definition part away from the substrate, arranging a part of the isolation column in the first groove, and extending another part of the isolation column to the outside of the first groove in the direction away from the substrate, the organic functional layer covering the isolation column is disconnected from the organic functional layer covering the pixel definition part; the isolation column can disconnect the organic functional layer covering the upper surface of the isolation column from the organic functional layer covering the pixel definition part, can prevent the current in the lighted sub-pixel from flowing into another sub-pixel with a different light-emitting color in the adjacent direction, so that the adjacent sub-pixel which does not need to be lighted with another light-emitting color will not appear mis-lighting, and the display abnormality of the organic light-emitting display panel is avoided; and since the isolation column is arranged in the first groove formed by the pixel definition part instead of being directly arranged on the plane of the pixel definition part without the first groove, the height of the isolation column caused by arranging the isolation column can be reduced, the partial light shielding of the sub-pixel caused by the isolation column is avoided, the voltage for driving the sub-pixel is increased, and the problem of the power consumption increase of the organic light-emitting display panel is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of a first structure of the organic light-emitting display panel of the application;

[0024] Figure 2 is a schematic diagram of a second structure of the organic light-emitting display panel of the application;

[0025] Figure 3 is a schematic diagram of a third structure of the organic light-emitting display panel of the application;

[0026] Figures 4a-4d is a schematic diagram of a manufacturing method of the organic light-emitting display panel of the application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 100-substrate; 200-organic flat layer, 210-second groove; 300-pixel definition layer, 310-pixel definition part, 311-first groove; 400-isolation column, 410-first surface, 420-second surface, 430-side surface; 500-organic functional layer; 600-inorganic encapsulation layer; 700-anode. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be described below in combination with the drawings in the embodiments of the application. The technical solutions described below are only used to explain and illustrate the idea of the application, and should not be regarded as a limitation on the protection scope of the application.

[0030] In addition, the terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are used to distinguish different technical features. The term "a plurality of" and similar terms means two or more, unless otherwise expressly limited.

[0031] A first embodiment of the present application provides an organic light emitting display panel, referring to Figures 1-3 The organic light emitting display panel includes a substrate 100, an organic planar layer 200, a pixel definition layer 300, a spacer column 400, and an organic functional layer 500.

[0032] Specifically, the organic planar layer 200 is arranged on the substrate 100; the pixel definition layer 300 is arranged on a surface of the organic planar layer 200 away from the substrate 100, and the pixel definition layer 300 includes a plurality of pixel definition portions 310 arranged at intervals, and the pixel definition portion 310 is provided with a first groove 311 on a side away from the substrate 100; a part of the spacer column 400 is arranged in the first groove 311, and another part of the spacer column 400 extends to the outside of the first groove 311 in a direction away from the substrate 100; the organic functional layer 500 is arranged on a side of the pixel definition layer 300 away from the substrate 100, and a part of the organic functional layer 500 covers the spacer column 400, and a part of the organic functional layer 500 covers the pixel definition portion 310.

[0033] The conventional organic light-emitting display panel needs to set a pixel definition layer 300 on the array substrate 100 after the array substrate 100 is prepared to form a display device, open through the pixel definition layer 300, and set an organic functional layer 500 corresponding to the light-emitting layer. However, the organic light-emitting display panel includes a plurality of sub-pixels of different colors in the light-emitting pixel area. Since the organic functional layer 500 is a continuous film layer, there is a horizontal leakage current between adjacent sub-pixels. When a sub-pixel of a certain light-emitting color is lighted, the horizontal leakage current will flow into the adjacent sub-pixel of other light-emitting colors, so that the adjacent sub-pixel of other light-emitting colors is mistakenly lighted, causing the display abnormality of the organic light-emitting display panel. Therefore, the organic light-emitting display panel of the present application is provided with a first groove 311 on the side of the pixel definition part 310 away from the substrate 100, a part of the isolation column 400 is arranged in the first groove 311, and the other part of the isolation column 400 extends to the outside of the first groove 311 in the direction away from the substrate 100, covering the organic functional layer 500 of the isolation column 400 and disconnecting the organic functional layer 500 covering the pixel definition part 310. The isolation column 400 can disconnect the organic functional layer 500 covering the upper surface of the isolation column 400 from the organic functional layer 500 covering the pixel definition part 310, prevent the current in the lighted sub-pixel from flowing horizontally into the adjacent sub-pixel of different light-emitting colors, so that the adjacent sub-pixel of other light-emitting colors will not be mistakenly lighted, avoiding the display abnormality of the organic light-emitting display panel. In addition, since the isolation column 400 is arranged in the first groove 311 formed by the pixel definition part 310, instead of being directly arranged on the plane of the pixel definition part 310 without the first groove 311, the height of the isolation column 400 is increased due to the arrangement of the isolation column 400, which can reduce the light shielding of the sub-pixel by the isolation column 400, avoid the increase of the voltage for driving the sub-pixel, and the problem of the increase of the power consumption of the organic light-emitting display panel.

[0034] In the present embodiment, the organic functional layer 500 covering the isolation column 400 is disconnected from the organic functional layer 500 covering the pixel definition part 310.

[0035] In the present embodiment, the organic light-emitting display panel further includes an anode 700 arranged on the organic planar layer 200.

[0036] In the present embodiment, a pixel opening is formed between two adjacent pixel definition parts 310.

[0037] In the present embodiment, the first groove 311 is formed by etching on the pixel definition part 310.

[0038] In the present embodiment, reference is made to Figure 1, the ratio of the depth a of the first groove 311 to the height b of the isolation column 400 is not greater than 0.5. By setting the ratio of the depth a of the first groove 311 to the height b of the isolation column 400 to be not greater than 0.5, the part of the isolation column having a certain height is located outside the groove, avoiding the absolute value of the difference between the depth a of the first groove 311 and the height b of the isolation column 400 being too small to cause the isolation column 400 to fail to play a role of covering the upper surface of the isolation column 400. The organic functional layer 500 covering the pixel definition part 310. Preferably, the ratio of the depth a of the first groove 311 to the height b of the isolation column 400 is 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49 or 0.5.

[0039] In the present embodiment, with reference to Figure 1 , the ratio of the width c of the first groove 311 to the width d of the isolation column 400 is in the range of 1.5-3. By setting the ratio of the width c of the first groove 311 to the width d of the isolation column 400 to be in the range of 1.5-3, on the one hand, the difficulty of the isolation column 400 is avoided to be increased due to the too small width c of the first groove 311, and on the other hand, the width c of the first groove 311 is avoided to be too large to cause the anode 700 to be etched when the first groove 311 is made, thereby reducing the working stability of the organic light-emitting display panel. Preferably, the ratio of the width c of the first groove 311 to the width d of the isolation column 400 is 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 or 3.0.

[0040] In the present embodiment, with reference to Figure 3The second recess 210 is arranged on the side of the organic planar layer 200 away from the substrate 100, and a part of the organic planar layer 200 fills the second recess 210. In the top view of the organic light-emitting display panel, the isolation column 400 is located in the second recess 210. By arranging the second recess 210 on the side of the organic planar layer 200 away from the substrate 100, and arranging a part of the organic planar layer 200 to fill the second recess 210, and arranging, in the top view of the organic light-emitting display panel, the isolation column 400 in the second recess 210, that is, arranging the second recess 210 at the position corresponding to the first recess 311 on the planar layer, the depth of the first recess 311 can be increased, so that the relative height of the isolation column 400 is reduced without reducing the height of the isolation column 400, and the problem of increasing power consumption of the organic light-emitting display panel caused by the increase of voltage for driving the sub-pixel is further avoided.

[0041] In the embodiment, with reference to Figure 1 The isolation column 400 includes a first surface 410, a second surface 420, and a side surface 430. The distance from the first surface 410 to the substrate 100 is greater than the distance from the second surface 420 to the substrate 100. The side surface 430 is located between the first surface 410 and the second surface 420. The included angle formed by the first surface 410 and the side surface 430 is less than 90 degrees. The included angle formed by the second surface 420 and the side surface 430 is greater than 90 degrees. By arranging the isolation column 400 to include the first surface 410, the second surface 420, and the side surface 430, the distance from the first surface 410 to the substrate 100 is greater than the distance from the second surface 420 to the substrate 100, the side surface 430 is located between the first surface 410 and the second surface 420, the included angle formed by the first surface 410 and the side surface 430 is less than 90 degrees, and the included angle formed by the second surface 420 and the side surface 430 is greater than 90 degrees. When the organic functional layer 500 is manufactured, the organic functional layer 500 is more easily cut off by using the evaporation process to manufacture the organic functional layer 500 when the organic light-emitting display panel is manufactured, so as to ensure that the isolation column 400 can disconnect the organic functional layer 500 covering the upper surface of the isolation column 400 from the organic functional layer 500 covering the pixel definition part 310 in the lower region of the isolation column 400.

[0042] In the embodiment, with reference to Figure 1 The area of the first surface 410 is greater than the area of the second surface 420.

[0043] In the embodiment, the cross section of the isolation column 400 is in the shape of an inverted trapezoid.

[0044] In the embodiment, with reference toFigure 2 The organic light-emitting display panel further comprises an inorganic encapsulation layer 600 covering the organic functional layer 500 and a part of the isolation column 400.

[0045] In the embodiment, referring to Figure 2 The connecting part between the first surface 410 and the side surface 430 protrudes away from the direction of the substrate 100, and the surface S1 at the connecting part of the first surface 410 and the side surface 430 is an arc convex surface. By setting the connecting part between the first surface 410 and the side surface 430 to protrude away from the direction of the substrate 100, and the surface S1 at the connecting part of the first surface 410 and the side surface 430 to be an arc convex surface, the arc convex surface can facilitate the film formation and extension of the inorganic encapsulation layer 600 on the side surface 430 of the isolation column 400.

[0046] In the embodiment, referring to Figure 2 The connecting part between the second surface 420 and the side surface 430 is recessed toward the direction of the substrate 100, and the surface S2 at the connecting part of the second surface 420 and the side surface 430 is an arc concave surface. By setting the connecting part between the second surface 420 and the side surface 430 to be recessed toward the direction of the substrate 100, and the surface S2 at the connecting part of the second surface 420 and the side surface 430 to be an arc concave surface, the arc concave surface can facilitate the deposition of the inorganic encapsulation layer 600 in the lower area of the isolation column 400, avoid encapsulation failure in the lower area of the isolation column 400, and the arc convex surface of the isolation column 400 can cooperate with the arc concave surface, so that the inorganic encapsulation layer 600 forms a complete layer, thereby improving the encapsulation reliability of the organic light-emitting display panel.

[0047] In the embodiment, referring to Figure 1 The area A1 of the opening of the first groove 311 away from the substrate 100 is greater than the area A2 of the opening of the first groove 311 close to the substrate 100. By setting the area A1 of the opening of the first groove 311 away from the substrate 100 to be greater than the area A2 of the opening of the first groove 311 close to the substrate 100, it can facilitate the deposition of the organic functional layer 500 in the first groove 311, thereby reducing the difficulty of manufacturing the organic light-emitting display panel.

[0048] In the embodiment, the included angle between the bottom surface of the first groove 311 and the side surface 430 of the first groove 311 is greater than 90 degrees.

[0049] In the embodiment, the area of the opening of the second groove 210 away from the substrate 100 is greater than the area of the opening of the second groove 210 close to the substrate 100.

[0050] In the embodiment, the angle between the bottom surface of the second groove 210 and the side surface 430 of the second groove 210 is greater than 90 degrees.

[0051] In the embodiment, the material of the isolation column 400 is negative photoresist material. The exposed part of the negative photoresist material is insoluble in the developing solution due to cross-linking and curing, and the unexposed part is soluble in the developing solution, so that the negative photoresist material can be used to facilitate the manufacture of the inverted trapezoidal isolation column 400.

[0052] The second embodiment of the present application provides a manufacturing method of an organic light-emitting display panel, referring to Figures 4a-4d , the manufacturing method comprises the following steps:

[0053] Manufacturing a pixel definition layer 300 on a substrate 100;

[0054] Manufacturing a plurality of pixel openings on the pixel definition layer 300, so as to form a plurality of spaced pixel definition parts 310 on the substrate 100;

[0055] Etching a first slot on the pixel definition part 310;

[0056] Forming an isolation column 400 on the first slot;

[0057] Forming an organic functional layer 500 on the pixel definition layer 300, wherein a part of the organic functional layer 500 covers the isolation column 400, a part of the organic functional layer 500 covers the pixel definition part 310, and the organic functional layer 500 covering the isolation column 400 is disconnected from the organic functional layer 500 covering the pixel definition part 310;

[0058] Manufacturing an inorganic encapsulation layer 600 on the organic functional layer 500.

[0059] The specific embodiments of the present application are described in detail above. The above-mentioned embodiments disclosed by the present application are only preferred embodiments of the present application, and those skilled in the art can make many modifications and improvements without departing from the concept of the present application. These modifications and improvements all fall within the protection scope of the claims of the present application.

Claims

1. An organic light-emitting display panel, characterized in that, include: substrate; An organic planarization layer is disposed on the substrate; A pixel definition layer is disposed on a surface of the organic planarization layer away from the substrate. The pixel definition layer includes a plurality of spaced pixel definition portions, and a first groove is provided on the side of the pixel definition portion away from the substrate. An isolation post, a portion of which is disposed within the first groove, and another portion of which extends outward from the substrate to the outside of the first groove; An organic functional layer is disposed on the side of the pixel definition layer away from the substrate, a portion of the organic functional layer covers the isolation pillar, and a portion of the organic functional layer covers the pixel definition portion.

2. The organic light-emitting display panel according to claim 1, characterized in that, The ratio of the depth of the first groove to the height of the isolation post is no greater than 0.

5.

3. The organic light-emitting display panel according to claim 1, characterized in that, The ratio of the width of the first groove to the width of the isolation post ranges from 1.5 to 3.

4. The organic light-emitting display panel according to claim 1, characterized in that, The isolation pillar includes a first surface, a second surface, and a side surface. The distance from the first surface to the substrate is greater than the distance from the second surface to the substrate. The side surface is located between the first surface and the second surface. The angle formed by the connection between the first surface and the side surface is less than 90 degrees, and the angle formed by the connection between the second surface and the side surface is greater than 90 degrees.

5. The organic light-emitting display panel according to claim 4, characterized in that, The area of ​​the first surface is greater than the area of ​​the second surface.

6. The organic light-emitting display panel according to claim 4, characterized in that, The organic light-emitting display panel further includes an inorganic encapsulation layer, which covers the organic functional layer and a portion of the isolation pillars; The connection portion between the first surface and the side surface protrudes in the direction away from the substrate, and the surface at the connection between the first surface and the side surface is an arc-shaped convex surface.

7. The organic light-emitting display panel according to claim 6, characterized in that, The connection portion between the second surface and the side surface is recessed toward the substrate, and the surface at the connection between the second surface and the side surface is an arc-shaped concave surface.

8. The organic light-emitting display panel according to claim 1, characterized in that, The area of ​​the opening of the first groove away from the substrate is greater than the area of ​​the opening of the first groove on the side closer to the substrate.

9. The organic light-emitting display panel according to claim 1, characterized in that, The organic planarization layer has a second groove on the side away from the substrate, and a portion of the organic planarization layer fills the second groove; In the top view of the organic light-emitting display panel, the isolation pillar is located within the second groove.

10. The organic light-emitting display panel according to claim 1, characterized in that, The isolation column is made of negative photoresist material.

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