CN107768402B

CN107768402B - Display panel with barrier device

Info

Publication number: CN107768402B
Application number: CN201710003851.5A
Authority: CN
Inventors: 陈扬证; 许乃方; 吴昱娴
Original assignee: Individual
Current assignee: Innolux Corp
Priority date: 2016-08-23
Filing date: 2017-01-04
Publication date: 2020-10-09
Anticipated expiration: 2037-01-04
Also published as: CN107768402A

Abstract

A display panel with a barrier device comprises a substrate with a display area and a non-display area; the first inorganic material layer is positioned in the non-display area; the cathode electrode is positioned in the non-display area and on the first inorganic material layer, and is provided with a second side surface which is adjacent to and parallel to the first side surface; the organic material layer is arranged on the substrate and covers the cathode electrode, and a first distance (H) is reserved between the top surface of the first inorganic material layer and the top surface of the organic material layer at the second side surface; a first barrier device disposed in the non-display region and between the first side of the substrate and the organic material layer, the first barrier device having a first maximum barrier height (Hdam) and a barrier width (Wdam), a bottom edge of a fourth side of the first barrier device having a minimum distance (Lsr) to the second side; wherein H x (0.1870-Wdam/(2.46 XLsr)) ≦ Hdam ≦ H x (0.9548-Wdam/(44.26 XLsr)).

Description

Display panel with barrier device

Technical Field

The present invention relates to a display panel, and more particularly, to a display panel having a barrier device.

Background

Electronic products with display panels are indispensable to modern people, whether in work, process, study or personal entertainment, and include smart phones (SmartPhone), tablet computers (Pad), Notebook computers (Notebook), monitors (Monitor) to Televisions (TV), and other related products. Display panels, in addition to the mature liquid crystal display technology, have long been widely used to replace the early Cathode Ray Tube (CRT) displays, which are compact, lightweight, portable, less expensive, more reliable, and more comfortable for the eyes. The Organic Light Emitting Diode (OLED) display technology uses a very thin organic material coating and a glass substrate, and when a current flows, the organic material emits light, so that a backlight is not required.

Disclosure of Invention

The embodiment of the invention relates to a structural design for arranging at least one blocking device in a non-display area of a display panel.

According to an embodiment of the present invention, a display panel is provided, which includes a substrate having a display area and a non-display area surrounding the display area, wherein the substrate has a first side surface; a first inorganic material layer located in the non-display region, the first inorganic material layer having a top surface; a cathode electrode in the non-display region and on the first inorganic material layer, wherein the cathode electrode has a second side and a third side substantially parallel to the first side, the second side is opposite to the third side, and the second side is adjacent to the first side of the substrate; an organic material layer disposed on the substrate and covering the cathode electrode, wherein the organic material layer has a top surface, and a first distance H is provided between the top surface of the first inorganic material layer and the top surface of the organic material layer at the second side surface; and a first barrier device disposed in the non-display region and between the first side of the substrate and the organic material layer, the first barrier device having a first maximum barrier height Hdam and a barrier width Wdam, wherein the first barrier device has a fourth side adjacent to the second side of the cathode electrode, wherein a minimum distance Lsr is between a bottom edge of the fourth side and the second side; wherein the content of the first and second substances,

H×(0.1870-Wdam/(2.46×Lsr))≤Hdam≤H×(0.9548-Wdam/(44.26×Lsr))。

in order to better understand the above and other aspects of the present invention, the following detailed description is made with reference to the accompanying drawings, in which:

drawings

FIG. 1A is a top view of a display panel according to a first embodiment of the present invention;

FIG. 1B is a top view of another display panel according to the first embodiment of the present invention;

FIG. 2 is a schematic partial cross-sectional view of the display panel along the section line 2-2 in FIG. 1A;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIGS. 4A to 4C are top views of three different configurations of a first blocking device and a second blocking device of a display panel according to a second embodiment of the present invention;

FIG. 5 is a schematic partial cross-sectional view of the display panel along the section line 5-5 in FIG. 4A;

FIGS. 6A-6B are schematic views illustrating two different arrangement patterns of a second blocking device and a first inorganic material layer in a display panel according to a second embodiment;

fig. 7A to 7C are schematic views illustrating three different arrangement patterns of the groove of the first inorganic material layer, the second blocking device and the inorganic material layer in the display panel according to the embodiment.

Description of the symbols

A_D: display area

A_ND: non-display area

Rc and Rc': cathode electrode area

1. 1': display panel

10: substrate

10 a: first side of the substrate

11: a first inorganic material layer

11 a: top surface of the first inorganic material layer

11 t: groove

130: planarization layer

131: pixel definition layer

132: cathode electrode

13 b-2: second side of the cathode electrode

13 b-3: third side of the cathode electrode

15: organic material layer

15 a: top surface of organic material layer

16. 16': first blocking device

16 b: fourth side of the first blocking means

16 e: bottom edge of the fourth side

17. 17': second blocking device

18: second inorganic material layer

H: first distance

H0: thickness of the planarization layer

H1: thickness of pixel definition layer

H2: thickness of organic material layer

H_CE: thickness of cathode electrode

Hdam: first maximum barrier height

Hdam 2: second maximum barrier height

Wdam: barrier width

Lsr, Lorg: minimum distance

Detailed Description

In the substrate package of an organic light emitting diode display panel (OLED), the organic material layer is easily affected by water and oxygen, and therefore, in the thin film package manufacturing process, the problems of water and oxygen blocking capability and easy overflow of the organic material layer need to be considered. Embodiments of the present invention provide a display panel, which has a structural design in which at least one blocking device (dam) is disposed in a non-display region, so as to control a boundary position of an organic layer in a thin film package, solve an overflow problem easily generated in the thin film package organic layer in a conventional structure, and increase a path length of water and oxygen entering the display region, thereby improving a quality of the display panel. The blocking device is disposed on at least one side of the non-display area, and may be disposed discontinuously or continuously, for example, two sides, three sides or four sides discontinuously located therein, or at least two sides, three sides or four sides continuously surrounding the display area; embodiments provide a height design of the blocking means at one side of the non-display area.

Embodiments of the present invention are described in detail below with reference to the attached drawings. Embodiments of the present invention are applied to a composite thin film (inorganic layer/organic layer/inorganic layer) package between two substrates (e.g., CG flexible substrate and Array flexible substrate) of an Organic Light Emitting Diode (OLED) display device, for example. It should be noted that the structure and content of the embodiments presented in the examples are only for illustrative purposes. The present invention is not intended to show all possible embodiments, and those skilled in the art can change or modify the structure of the embodiments to suit the actual application without departing from the spirit and scope of the present invention. Thus, other embodiments not contemplated by the present invention may also be applicable. Moreover, the drawings have been simplified to illustrate the embodiments clearly, and the dimensional proportions in the drawings are not to scale with respect to actual products. Accordingly, the description and drawings are only for the purpose of illustrating embodiments and are not to be construed as limiting the scope of the invention. Further, the same or similar reference numerals are used to designate the same or similar components in the embodiments.

Moreover, the use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a claim element does not by itself connote any preceding ordinal number of the claim element, nor does it denote the order of a certain claim element from another claim element or method of manufacture, but are used merely to distinguish one claim element having a certain name from another element having a same name. The following description will be made of an embodiment of a liquid crystal display panel having a back channel etched transistor array substrate.

< first embodiment >

Fig. 1A is a top view of a display panel according to a first embodiment of the invention. Fig. 1B is a top view of another display panel according to the first embodiment of the invention. In fig. 1A and 1B, the substrate of the display panel 1, 1' of the embodiment has a display area a_DSurrounding the display area A_DA non-display area A_NDA cathode electrode region Rc/Rc' (having a region where the cathode electrode is disposed)Domain) is located in the non-display area a_NDOr extend to the display area A_DInner and arranged in the non-display area A_NDA first barrier device 16, and the first barrier device 16 is continuously disposed in the display area a_DAt least one side of, e.g. surrounding, the display area A_DTwo, three, or four sides (fig. 1A and 1B illustrate a closed quadrilateral) and are located between the side surface (the first side surface 10a described later) of the substrate and the cathode electrode region Rc/Rc'. In other embodiments, the first blocking device 16 of the display panel may also be discontinuous and disposed on one, two, or three sides, but the invention is not limited thereto. The display area, the non-display area and the cathode electrode area of the display panel are the common knowledge of those skilled in the art, and the details thereof are not repeated herein.

Fig. 1A and 1B differ in that: the cathode region Rc of FIG. 1A is located in the non-display region A_NDAdjacent to the display area A_DIn the non-display area A_NDAnd the cathode electrode is positioned in the display area A_DThe cathode electrode can be electrically connected through the through hole, but only the non-display area A is shown in the figure_NDThe cathode electrode of (1). The cathode region Rc' of FIG. 1B can be selected from the non-display region A_NDDirectly extend to the display area A_DAnd spans the whole display area A_D. However, the present invention is not limited to the configuration of the cathode electrode region, and in other embodiments, the cathode electrode region Rc may be located in the non-display region a_NDAdjacent to the display area A_DTwo or three sides of the display area A are arranged through the through hole_DThe cathode electrode is electrically connected with or directly extends to the display area A_DIt is not limited thereto. Wherein is located in the non-display area A_NDMay correspond to a gop (gate on panel) circuit. The cross-section of the embodiment of FIG. 1A is illustrated as follows.

FIG. 2 is a partial cross-sectional view of the display panel along the section line 2-2 of FIG. 1A. Please refer to fig. 1A and fig. 2. The display panel 1 of the embodiment includes a substrate 10 (having a display area A)_DAnd a NAND display area A_ND) A first inorganic material layer 11 (e.g., an interlayer dielectric or buffer layer) on the substrate 10A cathode electrode 132 in the non-display region A_NDOn the first inorganic material layer 11, an organic material layer 15 disposed on the substrate 10 and covering the cathode electrode 132, and a first barrier device 16 disposed in the non-display region A_ND. Wherein the substrate 10 has a first side 10a (i.e. perpendicular to and connecting the upper and lower surfaces of the substrate), the first inorganic material layer 11 has a top surface 11a, the first blocking device 16 is located between the first side 10a of the substrate 10 and the organic material layer 15, and the description of "between" also includes the situation where the blocking device partially overlaps the organic material layer 15.

In one embodiment, the cathode electrode 132 has a second side 13b-2 and a third side 13b-3 substantially parallel to the first side 10a of the substrate 10, wherein the second side 13b-2 is opposite to the third side 13b-3, and the second side 13b-2 is adjacent to the first side 10a of the substrate 10 than the third side 13 b-3.

In the embodiment, in the non-display area A_NDA Pixel Defining Layer (PDL) 131 is included at the corresponding cathode electrode 132, the cathode electrode 132 is above the pixel defining layer 131, and the second side 13b-2 of the cathode electrode 132 is adjacent to the first blocking means 16.

Furthermore, the organic material layer 15 disposed on the substrate 10 and covering the cathode electrode 132 has a top surface 15a, wherein at the second side 13b-2 of the cathode electrode 132, a first distance H is formed between the top surface 11a of the first inorganic material layer 11 and the top surface 15a of the organic material layer 15. As shown in fig. 2, the first distance H is perpendicular to the top surface 11a of the first inorganic material layer 11 and substantially parallel to the first side surface 10a of the substrate 10.

According to the embodiment, the first barrier device 16 has a first maximum barrier height Hdam and a barrier width Wdam. Wherein the first blocking means 16 has a fourth side 16b adjacent to the second side 13b-2 of the cathode electrode 132. In one embodiment, the first blocking device 16 is formed on the top surface 11a of the first inorganic material layer 11, for example, and the bottom edge 16e of the fourth side surface 16b contacts the top surface 11a of the first inorganic material layer 11. In one embodiment, the first blocking means 16 has a bottom surface connected to the bottom edge 16e of the fourth side surface 16b, the bottom surface contacting the top surface 11a of the first inorganic material layer 11, and the bottom surface having a blocking width Wdam.

In practice, the first blocking device 16 may be fabricated together with the pixel defining layer 131, for example, so that the first blocking device 16 and the pixel defining layer 131 may comprise the same material. The invention is not so limited. In one embodiment, the material of the first barrier 16 includes carbon (C) or oxygen (O) or nitrogen (N), for example.

Fig. 3 is a partially enlarged view of fig. 2. Referring to fig. 2, at the second side 13b-2 of the cathode electrode 132, a first distance H is formed between the top surface 11a of the first inorganic material layer 11 and the top surface 15a of the organic material layer 15. The second side 13b-2 of the cathode electrode 132 is projected at a point on the substrate 10 with a minimum distance Lsr from the point on the substrate 10 where the bottom edge 16e of the fourth side 16b of the first barrier means 16 is projected. In addition, the second side 13b-2 of the cathode electrode 132 is projected at a point of the substrate 10 with a minimum distance Lorg from the first side 10a of the substrate 10. As shown in fig. 3, the first distance H, the minimum distance lrg, and a line connecting a highest point of the first distance H and an end of the minimum distance lrg may be regarded as forming a right triangle, and the first maximum blocking height Hdam may be calculated by (lrg-Lsr-Wdam/2) × (H/lrg). And assuming that Lorg ═ a × Lsr is an upper limit value and Lorg ═ b × Lsr is a lower limit value, the upper limit value of the first maximum barrier height Hdam can be expressed as:

Hdam＝(Lorg-Lsr-Wdam/2)×(H/Lorg)

＝(a×Lsr-Lsr-Wdam/2)×(H/(a×Lsr))

＝H-H/a-(Wdam×H)/(2×a×Lsr)

＝H(1-1/a-Wdam/2×a×Lsr)。

thus, the first maximum barrier height Hdam is between H (1-1/b-Wdam/2 × b × Lsr) and H (1-1/a-Wdam/2 × a × Lsr).

When the above formula is substituted for the values of a and b of 22.13 and 1.23 to obtain the upper and lower limits of the first maximum barrier height Hdam, the following formula (1) can be obtained:

H×(0.1870-Wdam/(2.46×Lsr))≤Hdam≤H×(0.9548-Wdam/(44.26×Lsr)).........(1)。

therefore, in practical applications, the upper and lower limit ranges of the first maximum blocking height Hdam of the first blocking device 16 can be obtained by substituting the first distance H, the blocking width Wdam, and the minimum distance Lsr into the above equation (1). Heights of the first blocking means 16 that fall within the upper and lower limits may be used. In an embodiment, the cross-section of the first blocking means 16 has a symmetrical shape (the first blocking means 16 is a symmetrical bump, for example) with the first maximum blocking height Hdam as a symmetry axis, but in other embodiments, the shape of the first blocking means 16 may be asymmetrical.

< second embodiment >

In addition to the first barrier device 16 described in the first embodiment, the display panel may further include a second barrier device 17 disposed outside the first barrier device 16. Fig. 4A to 4C are schematic top views of a display panel according to a second embodiment of the invention, in which three different arrangement modes of a first blocking device and a second blocking device are respectively illustrated. Wherein the first blocking means 16 and the second blocking means 17 may be continuously or discontinuously arranged on at least one side of the display area. The first blocking means 16 and the second blocking means 17 may be similar in form, for example, also a closed square (e.g. square) surrounding the display area, and the second blocking means 17 is located at the periphery of the first blocking means 16, as shown in fig. 4A; or one of them is a closed square and the other is a shape (e.g. n-shaped) surrounding only three sides of the display area, as shown in fig. 4B; or both may be shaped to surround only three sides of the display area, as shown in fig. 4C. The opening position of the first blocking device 16 and/or the second blocking device 17 is, for example, toward the peripheral circuit 41 receiving the signal, as shown in fig. 4B and 4C. In addition, refer to fig. 1A and 1B for top views of the display area, the non-display area, the cathode electrode area and the blocking device of the display panel. It should be understood that the relative positions of the elements and regions in all figures are for illustrative purposes only and are not intended to limit the scope of the invention or the embodiments in which the invention is used.

FIG. 5 is a partial cross-sectional view of the display panel along the section line 5-5 of FIG. 4A. For clarity, the same or similar reference numbers are used for the same or similar elements in fig. 5 and 2. The structure and arrangement of the same elements in the display panels of the second embodiment and the first embodiment include the substrate 10, the first inorganic material layer 11, the planarization layer 130, the pixel defining layer 131, the cathode electrode 132, the organic material layer 15, and the first blocking device 16', which are not described herein again.

As shown in fig. 5, the display panel of the second embodiment further includes a second blocking device 17 disposed between the first blocking device 16 'and the first side 10a of the substrate 10, in addition to the first blocking device 16' being disposed between the first side 10a of the substrate 10 and the organic material layer 15. In one embodiment, the first blocking device 16' is separated from the second blocking device 17 by a distance of, for example, 45 μm to 105 μm, and further, by a distance of, for example, 60 μm to 70 μm.

In addition, the second maximum blocking height Hdam2 of second blocking means 17 is, for example, higher than the first maximum blocking height Hdam of first blocking means 16', as shown in fig. 5. However, the heights of the two blocking devices are not particularly limited, and the second blocking device 17, which may be located at the outer side, is lower than, approximately equal to, or higher than the first blocking device 16', all falling within the applicable scope of the present invention.

Moreover, the display panels of the first and second embodiments further include a second inorganic material layer 18 disposed on the organic material layer 15. As shown in fig. 5, the second inorganic material layer 18 of the second embodiment covers the first barrier means 16' and covers the second barrier means 17. It should be noted that "covering" herein may include covering all or part of the barrier means as long as the second inorganic material layer 18 is located on the barrier means and partially contacts the barrier means.

Fig. 6A to 6B are schematic views of two different arrangement modes of the second blocking device and the first inorganic material layer 11 in the display panel of the second embodiment, in which the second blocking device 17 at least partially overlaps with the first inorganic material layer 11, the second blocking device 17 shown in fig. 6A is formed on the first inorganic material layer 11 (the projection areas of the two are completely overlapped), or the second blocking device 17 shown in fig. 6B partially covers the first inorganic material layer 11 (the projection areas of the two are partially overlapped). As shown in fig. 6B, a portion of the second blocking means 17 is on the first inorganic material layer 11 and a portion is on the substrate 10.

In practice, the second barrier means 17 and the first barrier means 16 may be fabricated together with the pixel defining layer 131, for example, so that the second barrier means 17, the first barrier means 16 and the pixel defining layer 131 may comprise the same material. The invention is not so limited. In one embodiment, the material of the second barrier means 17 and the first barrier means 16 comprises carbon (C), oxygen (O) or nitrogen (N), for example.

In addition, in practical applications, a concave pattern (e.g., a plurality of grooves) may also be formed on the first inorganic material layer 11 of the display panel of the first embodiment and the second embodiment. As shown in fig. 7A, the first inorganic material layer 11 of the first embodiment further includes a plurality of grooves 11t between the first blocking device 16' and the first side 10a of the substrate 10, and the second inorganic material layer 18 disposed on the organic material layer 15 fills the grooves 11t (but not limited thereto, the second inorganic material layer 18 may not fill the grooves 11t or only partially fill the grooves). As shown in fig. 7B and 7C, the first inorganic material layer 11 of the second embodiment further includes a plurality of grooves 11t between the second barrier devices 17 and the first side 10a of the substrate 10, and the second inorganic material layer 18 may further fill the grooves 11t (fig. 7B) or not cover the grooves 11t (fig. 7C) except covering the second barrier devices 17. In other embodiments, a plurality of bumps or an uneven surface may be formed on the first inorganic material layer 11 of the display panel of the first embodiment and the second embodiment, but the invention is not limited thereto.

Two examples are presented below, calculating the range of the first maximum barrier height Hdam according to equation (1). Please refer to fig. 2 and the related elements. Wherein the thickness H2 of the organic material layer 15 is the thickness from the top surface of the cathode electrode 132 on the pixel defining layer 131 to the top surface 15a of the organic material layer 15. Thickness H of cathode electrode 132_CEOr even other layers not shown, are omitted because of their small thickness relative to other layers.

< example 1>

When the thickness H0 of the planarization layer 130 is 1.255 μm, the thickness H1 of the pixel defining layer 131 is 1.412 μm, and the thickness H2 of the organic material layer 15 is 4.65 μm, the first distance H is 7.317 μm. Please refer to table 1. When the barrier width Wdam is 40.3 μm and the minimum distance Lsr is 1136.7 μm, the first maximum barrier height Hdam may be between 1.26 μm and 6.99 μm as calculated according to equation (1). When other values are unchanged and the minimum distance Lsr is 117.24 μm, the first maximum barrier height Hdam can be calculated to be between 0.34 μm and 6.93 μm according to equation (1). In an embodiment, the first maximum barrier height Hdam may be designed, for example, to be 3.6 μm.

The upper and lower limits obtained according to equation (1) are summarized in Table 1.

TABLE 1

< example 2>

Assuming the case of no planarization layer 130 and the thickness H of the cathode electrode 132_CEOr other layers not shown are omitted because the thickness of the pixel defining layer 131 is smaller than that of other layers, when the thickness H1 of the pixel defining layer 131 is 1.28 μm and the thickness H2 of the organic material layer 15 is 13.26 μm, the first distance H is 14.54 μm. Please refer to table 2. When the barrier width Wdam and the minimum distance Lsr are the values in table 2, the range of the first maximum barrier height Hdam can be calculated according to equation (1). In an embodiment, the first maximum barrier height Hdam may be designed, for example, to be 3.25 μm.

The upper and lower limits obtained according to equation (1) are summarized in Table 2.

TABLE 2

In addition, in one embodiment, the ratio of the maximum blocking height to the blocking width of the first blocking device is, for example, between 0.06 and 0.09 (ex: 3.6/40.3). It should be understood by those skilled in the art that the dimensions, such as the thickness H0 of the planarization layer 130, the thickness H1 of the pixel definition layer 131, the thickness of the organic material layer 15 and other related elements, may be appropriately selected according to different specifications of the application product (e.g., different electrical requirements and limitations), and thus these values are used for reference and are not intended to limit the present invention.

According to the display panel provided by the embodiment, the at least one blocking device is arranged in the non-display area, so that the boundary position of the organic material layer in the film package can be controlled, the problem that the organic layer of the film package is easy to overflow in the traditional structure is solved, and moisture is prevented from entering. The design of the second embodiment with two blocking devices, such as the first blocking device 16 and the second blocking device 17, ensures that the organic material layer does not overflow to the substrate side, prevents the water and oxygen from entering the substrate side, and lengthens the inorganic material layer to increase the path length of the water and oxygen. Therefore, the design of the embodiment can improve the quality of the display panel.

In summary, although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the definition of the appended claims.

Claims

1. A display panel, comprising:

the display device comprises a substrate, a first substrate and a second substrate, wherein the substrate is provided with a display area and a non-display area surrounding the display area;

a first inorganic material layer located in the non-display area, the first inorganic material layer having a top surface;

a cathode electrode in the non-display region and on the first inorganic material layer, wherein the cathode electrode has a second side and a third side substantially parallel to the first side, wherein the second side is opposite to the third side and the second side is adjacent to the first side of the substrate than the third side;

an organic material layer disposed on the substrate and covering the cathode electrode, wherein the organic material layer has a top surface, wherein at the second side surface, a first distance (H) is provided between the top surface of the first inorganic material layer and the top surface of the organic material layer; and

a first blocking device disposed in the non-display region and between the first side of the substrate and the organic material layer, the first blocking device having a first maximum blocking height (Hdam) and a blocking width (Wdam), wherein the first blocking device has a fourth side adjacent to the second side of the cathode electrode, wherein a bottom edge of the fourth side has a minimum distance (Lsr) to the second side; wherein:

H×(0.1870-Wdam/(2.46×Lsr))≤Hdam≤H×(0.9548-Wdam/(44.26×Lsr))。

2. the display panel of claim 1, wherein the first blocking device is formed on the top surface of the first inorganic material layer, and the bottom edge of the fourth side surface contacts the top surface of the first inorganic material layer.

3. The display panel of claim 1, wherein a ratio of the first maximum blocking height to the blocking width of the first blocking device is between 0.06 and 0.09.

4. The display panel of claim 1, further comprising a second inorganic material layer disposed on the organic material layer and covering the first barrier device.

5. The display panel of claim 1, wherein the first inorganic material layer further comprises a plurality of grooves between the first blocking device and the first side of the substrate.

6. The display panel of claim 1, further comprising a second barrier device interposed between the first barrier device and the first side of the substrate.

7. The display panel of claim 6, wherein the second barrier has a second maximum barrier height, the second maximum barrier height being greater than the first maximum barrier height.

8. The display panel of claim 6, wherein the distance between the first blocking means and the second blocking means is between 45 μm and 105 μm.

9. The display panel of claim 6, wherein the second blocking means at least partially overlaps the first inorganic material layer.

10. The display panel of claim 6, wherein the first inorganic material layer further comprises a plurality of grooves between the second blocking device and the first side of the substrate.

11. The display panel of claim 6, further comprising a second inorganic material layer disposed on the organic material layer and covering the second barrier device.

12. The display panel of claim 1, further comprising a pixel defining layer interposed between the first inorganic material layer and the cathode electrode.