Organic light emitting display panel

Abstract

The utility model discloses an organic light-emitting display panel, which is characterized in that the organic light-emitting display panel comprises a plurality of retaining walls and a curing bonding layer, the retaining walls are arranged on one side, far away from a substrate, of a packaging layer, the retaining walls are sequentially connected to define a containing cavity, the curing bonding layer is arranged in the containing cavity, and the curing bonding layer is arranged on the side, far away from the substrate, of the packaging layer. The cover plate is arranged on the side, away from the substrate, of the retaining wall, the cover plate is fixed to the curing bonding layer, and when the cover plate is installed, liquid glue can form the curing bonding layer after being cured and is fixed to the cover plate, so that the attaching precision of the cover plate is improved, and the problem of bubbles of the organic light-emitting display panel is solved.

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] The organic light emitting display panel comprises a substrate, a light emitting device layer arranged on the substrate, an encapsulation layer arranged on the substrate and covering the light emitting device layer, and a cover plate arranged on a side of the encapsulation layer away from the substrate. In a conventional scheme, the cover plate of the organic light emitting display panel is fixed on the encapsulation layer by an optical transparent adhesive. However, the bonding precision of the cover plate in this scheme is not high, which leads to the problem that the organic light emitting display panel is prone to bubbles. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide an organic light emitting display panel to improve the problem of bubbles in the organic light emitting display panel caused by low bonding precision of the cover plate.

[0004] Embodiments of the present application provide an organic light emitting display panel, comprising:

[0005] a substrate;

[0006] a light emitting device layer arranged on the substrate;

[0007] an encapsulation layer arranged on the substrate and covering the light emitting device layer;

[0008] a plurality of barrier walls arranged on a side of the encapsulation layer away from the substrate, the plurality of barrier walls being connected in sequence to form a containing cavity;

[0009] a cured adhesive layer arranged in the containing cavity;

[0010] a cover plate arranged on a side of the barrier wall away from the substrate, and the cover plate is fixed with the cured adhesive layer.

[0011] Further, in a top view of the organic light emitting display panel, the barrier wall does not overlap the light emitting device layer.

[0012] Further, the cured adhesive layer comprises a first cured adhesive sub-layer and a second cured adhesive sub-layer, the first cured adhesive sub-layer is arranged on the encapsulation layer, the second cured adhesive sub-layer is arranged on a surface of the first cured adhesive sub-layer away from the substrate, and the refractive index of the second cured adhesive sub-layer is greater than the refractive index of the first cured adhesive sub-layer.

[0013] Further, the area of the side of the cured adhesive layer away from the substrate is smaller than the area of the side of the cured adhesive layer close to the substrate.

[0014] Further, the width of the barrier wall is 0.02mm-0.2mm in the direction of the column of the organic light emitting display panel, or / and the width of the barrier wall is 0.02mm-0.2mm in the direction of the row of the organic light emitting display panel.

[0015] Further, the top surface of the solidified adhesive layer is not higher than the top surface of the barrier wall.

[0016] Further, the difference between the height of the barrier wall and the thickness of the solidified adhesive layer is not more than 0.01mm.

[0017] Further, the thickness of the solidified adhesive layer is 0.02mm-0.1mm, and the height of the barrier wall is 0.03mm-0.11mm.

[0018] Further, the ratio of the refractive index of the cover plate to the refractive index of the solidified adhesive layer is 0.95-1.05.

[0019] Further, the material of the solidified adhesive layer comprises transparent solidified glue.

[0020] The beneficial effects of the present application are:

[0021] The present application provides an organic light emitting display panel, by setting the organic light emitting display panel comprising a plurality of barrier walls and a solidified adhesive layer, a plurality of the barrier walls are arranged on the side of the encapsulation layer away from the substrate, a plurality of the barrier walls are sequentially connected to form a containing cavity, the solidified adhesive layer is arranged in the containing cavity, the cover plate is arranged on the side of the barrier wall away from the substrate, and the cover plate is fixed with the solidified adhesive layer. When the cover plate is installed, the liquid glue can form a solidified adhesive layer after solidification and is fixed with the cover plate, so as to improve the fitting precision of the cover plate and improve the problem of bubbles of the organic light emitting display panel. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of a conventional organic light emitting display panel;

[0023] Figure 2 is a schematic diagram of a first organic light emitting display panel of the present application;

[0024] Figure 3 is a schematic diagram of a second organic light emitting display panel of the present application;

[0025] Figure 4 is a schematic diagram of a third organic light emitting display panel of the present application;

[0026] Figure 5 is a top view of the barrier wall of the three organic light emitting display panels of the present application.

[0027] 100 - substrate; 200 - light emitting device layer; 300 - encapsulation layer; 400 - barrier wall, 410 - accommodating cavity; 500 - solidified adhesive layer, 510 - first solidified adhesive sub-layer, 520 - second solidified adhesive sub-layer; 600 - cover plate.

[0028] 01 - substrate; 02 - light emitting device layer; 03 - encapsulation layer; 04 - cover plate; 05 - optically transparent adhesive. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. The technical solutions described below are only used to explain and illustrate the ideas of the present application, and should not be regarded as limiting the protection scope of the present application.

[0030] In addition, the terms "first", "second", and similar words do not represent any order, quantity or importance, but are only used to distinguish different technical features. The term "multiple" and similar words represent two or more, unless otherwise explicitly limited.

[0031] Reference Figure 1 The organic light emitting display panel includes a substrate 01, a light emitting device layer 02 disposed on the substrate 01, an encapsulation layer 03 disposed on the substrate 01 and covering the light emitting device layer 02, and a cover plate 04 disposed on the side of the encapsulation layer 03 away from the substrate 01. The cover plate 04 of the conventional scheme organic light emitting display panel is fixed on the encapsulation layer 03 by the optically transparent adhesive 05, but the cover plate 04 of this scheme has low bonding precision, which leads to the organic light emitting display panel being prone to bubbles.

[0032] Therefore, the embodiments of the present application provide an organic light emitting display panel, which refers to Figures 2-5 The organic light emitting display panel includes a substrate 100, a light emitting device layer 200, an encapsulation layer 300, a plurality of barrier walls 400, a solidified adhesive layer 500, and a cover plate 600. The light emitting device layer 200 is disposed on the substrate 100. The encapsulation layer 300 is disposed on the substrate 100, and the encapsulation layer 300 covers the light emitting device layer 200. A plurality of barrier walls 400 are disposed on the side of the encapsulation layer 300 away from the substrate 100, and the plurality of barrier walls 400 are sequentially connected to form an accommodating cavity 410. The solidified adhesive layer 500 is disposed in the accommodating cavity 410, the cover plate 600 is disposed on the side of the barrier wall 400 away from the substrate 100, and the cover plate 600 is fixed with the solidified adhesive layer 500.

[0033] By setting the organic light emitting display panel to include a plurality of barriers 400 and a cured adhesive layer 500, the plurality of barriers 400 are arranged on a side of the encapsulation layer 300 away from the substrate 100, the plurality of barriers 400 are sequentially connected to form a containing cavity 410, the cured adhesive layer 500 is arranged in the containing cavity 410, the cover plate 600 is arranged on a side of the barrier 400 away from the substrate 100, and the cover plate 600 is fixed with the cured adhesive layer 500. When assembling the organic light emitting display panel, first, a plurality of barriers 400 sequentially connected to form a containing cavity 410 are formed on the encapsulation layer 300, then liquid glue is applied in the containing cavity 410 by a dripping mode of a spray head, and the cover plate 600 is pressed to make the cover plate 600 adhere to the liquid glue, then the liquid glue is heated and cured to form the cured adhesive layer 500. Since the liquid glue has good fluidity, the filling effect of the cured adhesive layer 500 can be improved, the amount of the liquid glue can be accurately controlled, the thickness of the cured adhesive layer 500 can be accurately controlled, the adhesion precision of the cover plate 600 is improved, and the problem of bubbles of the organic light emitting display panel is improved.

[0034] In the embodiment, with reference to Figures 2-4 In a top view of the organic light emitting display panel, the barrier 400 does not overlap with the light emitting device layer 200. By setting that, in a top view of the organic light emitting display panel, the barrier 400 does not overlap with the light emitting device layer 200, the barrier 400 can prevent the light emitting device layer 200 from being blocked, so that the light emitting efficiency of the organic light emitting display panel is improved.

[0035] In the embodiment, with reference to Figure 3 The cured adhesive layer 500 includes a first cured adhesive sub-layer 510 and a second cured adhesive sub-layer 520, the first cured adhesive sub-layer 510 is arranged on the encapsulation layer 300, the second cured adhesive sub-layer 520 is arranged on a surface of the first cured adhesive sub-layer 510 away from the substrate 100, and the refractive index of the second cured adhesive sub-layer 520 is greater than the refractive index of the first cured adhesive sub-layer 510. By setting that the cured adhesive layer 500 includes the first cured adhesive sub-layer 510 and the second cured adhesive sub-layer 520, the first cured adhesive sub-layer 510 is arranged on the encapsulation layer 300, the second cured adhesive sub-layer 520 is arranged on a surface of the first cured adhesive sub-layer 510 away from the substrate 100, and the refractive index of the second cured adhesive sub-layer 520 is greater than the refractive index of the first cured adhesive sub-layer 510, the loss of light reflection can be reduced, and the light emitting efficiency of the organic light emitting display panel is improved.

[0036] In the embodiment, the ratio of the refractive index of the cover plate 600 to the refractive index of the second cured adhesive sub-layer 520 is 0.95-1.05. By setting the ratio of the refractive index of the cover plate 600 to the refractive index of the second cured adhesive sub-layer 520 to be 0.95-1.05, the refractive index of the cover plate 600 matches the refractive index of the cured adhesive layer 500, thereby reducing the loss of light and improving the transmittance of light efficiency. Preferably, the ratio of the refractive index of the cover plate 600 to the refractive index of the second cured adhesive sub-layer 520 is 0.95, 0.96, 0.97, 0.98, 0.99, 1.0, 1.01, 1.02, 1.03, 1.04, or 1.05.

[0037] In the embodiment, the transmittance of the cured adhesive layer 500 is not less than 90%.

[0038] In the embodiment, referring to Figure 4 , the area S1 of the side of the cured adhesive layer 500 away from the substrate 100 is smaller than the area S2 of the side of the cured adhesive layer 500 close to the substrate 100.

[0039] In the embodiment, the width of the side of the barrier wall 400 away from the cover plate 600 is greater than the width of the side of the barrier wall 400 close to the cover plate 600. By setting the width of the side of the barrier wall 400 away from the cover plate 600 to be greater than the width of the side of the barrier wall 400 close to the cover plate 600, the contact area of the barrier wall 400 and the encapsulation layer 300 can be increased, thereby improving the stability of the structure of the organic light-emitting display panel.

[0040] In the embodiment, the cross section of the barrier wall 400 is trapezoidal.

[0041] In the embodiment, the width of the side of the barrier wall 400 away from the cover plate 600 is equal to the width of the side of the barrier wall 400 close to the cover plate 600.

[0042] In the embodiment, the cross section of the barrier wall 400 is rectangular.

[0043] In the embodiment, referring to Figure 2 , the width of the barrier wall 400 in the direction L of the columns of the organic light-emitting display panel is 0.02mm-0.2mm. By setting the width a of the barrier wall 400 to be 0.02mm-0.2mm, the risk of bending of the barrier wall 400 can be avoided, thereby ensuring the stability of the structure of the organic light-emitting display panel. Preferably, the width a of the barrier wall 400 is 0.02mm, 0.04mm, 0.06mm, 0.08mm, 0.1mm, 0.12mm, 0.14mm, 0.16mm, 0.18mm, or 0.2mm.

[0044] In the embodiment, the width of the barrier wall 400 is 0.02mm-0.2mm in the direction M of the rows of the organic light-emitting display panel. By setting the width a of the barrier wall 400 to be 0.02mm-0.2mm, the risk of bending of the barrier wall 400 can be avoided, thereby ensuring the stability of the structure of the organic light-emitting display panel. Preferably, the width a of the barrier wall 400 is 0.02mm, 0.04mm, 0.06mm, 0.08mm, 0.1mm, 0.12mm, 0.14mm, 0.16mm, 0.18mm or 0.2mm.

[0045] In the embodiment, the top surface of the cured adhesive layer 500 is not higher than the top surface of the barrier wall 400. By setting the top surface of the cured adhesive layer 500 to be not higher than the top surface of the barrier wall 400, the overflow of the liquid glue coated into the accommodating cavity 410 can be avoided.

[0046] In the embodiment, with reference to Figure 2 , the difference between the height b of the barrier wall 400 and the thickness c of the cured adhesive layer 500 is not more than 0.01mm. By setting the difference between the height b of the barrier wall 400 and the thickness c of the cured adhesive layer 500 to be not more than 0.01mm, the overflow of the liquid glue coated into the accommodating cavity 410 can be avoided while ensuring that the cover plate 600 can be connected with the cured adhesive layer 500. Preferably, the difference between the height b of the barrier wall 400 and the thickness c of the cured adhesive layer 500 is 0.001mm, 0.002mm, 0.003mm, 0.004mm, 0.005mm, 0.006mm, 0.007mm, 0.008mm, 0.009 or 0.01mm.

[0047] It should be noted that when the display panel is produced, since the cover plate 600 is not an entire plane, the cover plate 600 has a certain degree of bending deformation, and therefore when the top surface of the cured adhesive layer 500 is not higher than the top surface of the barrier wall 400, only the difference between the height b of the barrier wall 400 and the thickness c of the cured adhesive layer 500 needs to be set within a certain range, and the bottom surface of the cover plate 600 can still be directly in contact with the top surface of the cured adhesive layer 500.

[0048] In the embodiment, the thickness c of the cured adhesive layer 500 is 0.02mm-0.1mm. By setting the thickness c of the cured adhesive layer 500 to be 0.02mm-0.1mm, the stable connection of the cover plate 600 with the cured adhesive layer 500 can be ensured. Preferably, the thickness c of the cured adhesive layer 500 is 0.02mm, 0.03mm, 0.04mm, 0.5mm, 0.06mm, 0.07mm, 0.8mm, 0.09mm or 0.1mm.

[0049] In the embodiment, the height b of the barrier wall 400 is 0.03mm-0.11mm. Preferably, the height b of the barrier wall 400 is 0.03mm, 0.04mm, 0.04mm, 0.6mm, 0.07mm, 0.08mm, 0.9mm, 0.1mm, 0.11mm.

[0050] It should be noted that when the thickness c of the cured adhesive layer 500 is 0.02mm, the height b of the barrier wall 400 is 0.03mm, and when the thickness c of the cured adhesive layer 500 is 0.03mm, the height b of the barrier wall 400 is 0.04mm.

[0051] In the embodiment, the ratio of the refractive index of the cover plate 600 to the refractive index of the cured adhesive layer 500 is 0.95-1.05. By setting the ratio of the refractive index of the cover plate 600 to the refractive index of the cured adhesive layer 500 to be 0.95-1.05, the refractive index of the cover plate 600 matches the refractive index of the cured adhesive layer 500, thereby reducing the loss of light and improving the transmittance of light efficiency. Preferably, the ratio of the refractive index of the cover plate 600 to the refractive index of the cured adhesive layer 500 is 0.95, 0.96, 0.97, 0.98, 0.99, 1.0, 1.01, 1.02, 1.03, 1.04 or 1.05.

[0052] In the embodiment, the material of the cured adhesive layer 500 includes transparent cured glue, and specifically can be OCR (Optical Clear Resin) glue. The OCR optical glue has the characteristics of high light transmittance, high adhesion and weather resistance, etc. During the process of bonding the inner and outer screens, the OCR optical glue can ensure the close bonding between the screens, avoid the occurrence of bubbles and gaps, and thus ensure the clarity and stability of the screen display effect. In addition, the OCR optical glue also has good weather resistance and can maintain stable performance in different environments, thereby prolonging the service life of the screen.

[0053] The specific embodiments of the present application are described in detail above. The above-described embodiments disclosed by the present application are only preferred embodiments of the present application. Those skilled in the art can make many variations and improvements without departing from the concept of the present application. These variations and improvements fall within the scope of the claims of the present application.

Claims

1. An organic light emitting display panel, characterized by, The organic light emitting display panel comprises: a substrate; a light emitting device layer disposed on the substrate; an encapsulation layer disposed on the substrate, and covering the light emitting device layer; a plurality of barriers disposed on a side of the encapsulation layer away from the substrate, and sequentially connected to form a receiving cavity; a cured adhesive layer disposed in the receiving cavity; and a cover plate disposed on a side of the barriers away from the substrate, and fixed with the cured adhesive layer. 2.The organic light emitting display panel of claim 1, wherein, In a top view of the organic light emitting display panel, the barriers do not overlap the light emitting device layer. 3.The organic light emitting display panel of claim 1, wherein, The cured adhesive layer comprises a first cured adhesive sub-layer disposed on the encapsulation layer, and a second cured adhesive sub-layer disposed on a surface of the first cured adhesive sub-layer away from the substrate, and having a refractive index greater than that of the first cured adhesive sub-layer. 4.The organic light emitting display panel of claim 1, wherein, An area of a side of the cured adhesive layer away from the substrate is less than an area of a side of the cured adhesive layer close to the substrate. 5.The organic light emitting display panel of claim 1, wherein, In a direction of columns of the organic light emitting display panel, a width of the barriers is 0.02mm-0.2mm, or / and in a direction of rows of the organic light emitting display panel, a width of the barriers is 0.02mm-0.2mm. 6.The organic light emitting display panel of claim 1, wherein, A top surface of the cured adhesive layer is not higher than a top surface of the barriers. 7.The organic light emitting display panel of claim 6, wherein, A difference between a height of the barriers and a thickness of the cured adhesive layer is not greater than 0.01mm. 8.The organic light emitting display panel of claim 7, wherein, The thickness of the cured adhesive layer is 0.02mm-0.1mm, and the height of the barriers is 0.03mm-0.11mm. 9.The organic light emitting display panel of claim 1, wherein, A ratio of a refractive index of the cover plate to a refractive index of the cured adhesive layer is 0.95-1.

05. 10.The organic light emitting display panel of claim 1, wherein, A material of the cured adhesive layer comprises transparent cured glue.

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