OLED display panel

An OLED (organic light emitting diode) display panel is provided. The OLED display includes a substrate having a display region and a non-display region disposed around the display region, and the non-display region is provided with a partition wall. A first inorganic layer is disposed on the display region and the partition wall. A hydrophobic layer is disposed on the first inorganic layer and located corresponding to the partition wall. An organic layer is disposed on the first inorganic layer and a portion of the hydrophobic layer, wherein the organic layer is disposed on an inner side of the partition wall adjacent to the display region. A second inorganic layer is disposed on the organic layer.

BACKGROUND OF THE INVENTION

Field of Invention

The present invention relates to a field of display, and more particularly to a field of an OLED (organic light emitting diode) display panel.

Description of Prior Art

Organic materials used in OLED (organic light emitting diode) displays are highly susceptible to moisture and oxygen in the air whereby devices made of OLEDs may be easily to fail. Thus, OLED devices need to be packaged and require a moisture and oxygen permeability rate less than 10−6 g/m2d. The common traditional OLED packaging method is glass packaging; as the display technology is tending toward flexibility, the flexible display technology needs to apply a method of thin film packaging, and the basic structure of the thin film packaging is an inorganic/organic multilayer packaging form. The inorganic layer is usually deposited by means of PECVD (plasma enhanced chemical vapor deposition), etc., and the organic layer is mainly formed by inkjet printing (IJP). The function of the organic layer is planarizing and covering particles. In order to achieve a good leveling effect, ink with a lower viscosity is usually used for printing. Therefore, it is necessary to dispose a partition wall at the non-display region to determine the flowing boundary of the ink and prevent ink from overflowing from the display region to the non-display region. In order to effectively prevent the ink from overflowing, a plurality of partition walls is usually used.

However, use of a structure with two or three partition walls inevitably increases the distance of the cutting edge from the effective display region, and thus it is not conducive to carry out a narrow-framed display.

Therefore, the prior art has drawbacks, and thus it is urgent for improvement.

SUMMARY OF THE INVENTION

One objective of embodiments of the present invention is to provide an OLED (organic light emitting diode) organic display panel, which has beneficial effect of preventing ink from overflowing during printing.

An object of embodiments of the present invention is to provide an OLED display panel having the beneficial effect of preventing ink overflowing from printing.

In one embodiment of the present invention, the present invention provides an OLED display panel, which includes a substrate having a display region and a non-display region disposed around the display region, and the non-display region is provided with a partition wall; a first inorganic layer disposed on the display region and the partition wall; a hydrophobic layer disposed on the first inorganic layer and corresponding to the partition wall; an organic layer disposed on the first inorganic layer, wherein the organic layer is disposed on an inner side of the partition wall adjacent to the display region; and a second inorganic layer disposed on the organic layer; wherein the organic layer contacts with a portion of the hydrophobic layer, and the partition wall presents an annular structure.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer presents an annular structure, and a projection of the hydrophobic layer on the substrate covers a projection of the partition wall on the substrate.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer includes a first hydrophobic block disposed opposite to a second hydrophobic block and a third hydrophobic block disposed opposite to a fourth hydrophobic block, and the first hydrophobic block, the second hydrophobic block, the third hydrophobic block and the fourth hydrophobic block are interconnected to form the annular structure.

In one embodiment of an OLED display panel of the present invention, the first hydrophobic block, the second hydrophobic block, the third hydrophobic block and the fourth hydrophobic block each include a main body portion, a first end portion disposed on one side of the main body portion and a second end portion disposed on the other side of the main body portion, and the first end portion and the second end portion are both disposed on a surface of a side of the main body portion facing the partition wall.

In one embodiment of an OLED display panel of the present invention, an angle between the first end portion and the main body portion is 60 to 120 degrees, and an angle between the second end portion and the main body portion is 60 to 120 degrees.

In one embodiment of an OLED display panel of the present invention, the partition wall includes a first portion disposed opposite to a second portion, a third portion disposed opposite to a fourth portion, a first corner portion between the first portion and the third portion, a second corner portion between the first portion and the fourth portion, a third corner portion between the second portion and the third portion, and a fourth corner portion between the second portion and fourth portion; and the hydrophobic layer is disposed along the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer is further spaced at intervals along the first portion, the second portion, the third portion and the fourth portion.

In one embodiment of an OLED display panel of the present invention, material of the hydrophobic layer is polytetrafluoroethylene.

In further embodiment of the present invention, the present invention provides an OLED (organic light emitting diode) display panel, which includes a substrate having a display region and a non-display region disposed around the display region, and the non-display region is provided with a partition wall; a first inorganic layer disposed on the display region and the partition wall; a hydrophobic layer disposed on the first inorganic layer and corresponding to the partition wall; an organic layer disposed on the first inorganic layer, and the organic layer is disposed on an inner side of the partition wall adjacent to the display region; and a second inorganic layer disposed on the organic layer.

In one embodiment of an OLED display panel of the present invention, the organic layer contacts with a portion of the hydrophobic layer.

In one embodiment of an OLED display panel of the present invention, the partition wall presents an annular structure.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer presents an annular structure, and projection of the hydrophobic layer on the substrate covers projection of the partition wall on the substrate.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer includes a first hydrophobic block disposed opposite to a second hydrophobic block and a third hydrophobic block disposed opposite to a fourth hydrophobic block; and the first hydrophobic block, the second hydrophobic block, the third hydrophobic block and the fourth hydrophobic block are interconnected to form the annular structure.

In one embodiment of an OLED display panel of the present invention, the first hydrophobic block, the second hydrophobic block, the third hydrophobic block and the fourth hydrophobic block include a main body portion, a first end portion disposed on one side of the main body portion and a second end portion disposed on the other side of the main body portion, and the first end portion and the second end portion are both disposed on a surface of the main body portion facing a side of the partition wall.

In one embodiment of an OLED display panel of the present invention, an angle between the first end portion and the main body portion is 60 to 120 degrees, and an angle between the second end portion and the main body portion is 60 to 120 degrees.

In one embodiment of an OLED display panel of the present invention, the partition wall includes a first portion disposed opposite to a second portion, a third portion disposed opposite to a fourth portion, a first corner portion between the first portion and the third portion, a second corner portion between the first portion and the fourth portion, a third corner portion between the second portion and the third portion, and a fourth corner portion between the second portion and fourth portion; and the hydrophobic layer is disposed along the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion.

In one embodiment of an OLED display panel of the present invention, the hydrophobic layer is further spaced at intervals along the first portion, the second portion, the third portion and the fourth portion.

In one embodiment of an OLED display panel of the present invention, material of the hydrophobic layer is polytetrafluoroethylene.

The OLED display panel of the present invention improves the ink leveling at edges thereof and prevents the ink from overflowing by disposing a hydrophobic layer on the first inorganic layer, which is located corresponding to the partition wall. The present invention is beneficial to carry out a narrow-framed display. Moreover, the hydrophobic layer can further prevent external moisture and oxygen from entering the display region through lateral of the partition wall, whereby it improves the boundary packaging effect.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are used to understand the present invention, but are not to be as limiting.

In the description of the present invention, it is to be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” “outside,” “clockwise,” “counterclockwise,” etc., indicated as orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, they merely intend to illustrate the present invention and simplify the description, but are not to be as indicating or implying specific devices or elements having specific orientation, specific orientation structure and operating. Therefore, it cannot be understood as limitations. Moreover, the terms “first” and “second” are merely used for describing purposes, but are not to be conceived as indicating or implying a relative important or implicitly indicating specific technical feature numbers. Accordingly, the feature limitations of “first” or “second” may include one or more of the described features explicitly or implicitly. In the description of the present invention, the meaning of “a plurality of” is two or more, unless otherwise explicitly defined.

In the description of the present invention, it should be noted that, unless otherwise explicitly defined, the terms “installation,” “adjacent” and “connection” are to be understood broadly, for example, it may be fixed connection, disassembly connection or integral connection; it may be mechanical connection, electrically connection or interconnection; it may be directly connection or indirectly connected through an intermediate medium; and it may be interconnection of two elements or interaction of two elements. A person skilled in the art can conceive the specific meanings of the above-mentioned terms in the present invention based on the specific situation.

In the present invention, unless otherwise specifically defined and defined, the first feature is disposed “on” or “under” the second feature, which means that the first feature directly contacts the second feature, and also the first feature is not in direct contact the second feature but through addition features between them. Moreover, the first feature is disposed “above,” “on” and “upper” the second feature, which means that the first feature is directly or substantially above the second feature, or merely indicates that the first feature level is higher than the second feature. The first feature is “below,” “under” and “underneath” the second feature, which means that the first feature is directly or substantially below the second feature, or merely indicates that the first feature level is less than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may be repeated with reference numerals in the various examples, which are for the purpose of simplicity and clarity, and do not indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides embodiments of various specific processes and materials, but a person skilled in the art may recognize the use of other processes and/or the use of other materials.

Referring toFIG. 1, it is a schematic view of an OLED display panel according to an embodiment of the present invention. As shown inFIG. 1, the OLED display panel includes a substrate10; the substrate10includes a display region101and a non-display region102disposed around the display region101; the non-display region102is provided with a partition wall20. A first inorganic layer30is disposed on the display region101and the partition wall20. A hydrophobic layer40is disposed on the first inorganic layer30and it corresponds to the partition wall20. An organic layer50is disposed on the first inorganic layer30and a portion hydrophobic layer40. The organic layer50is disposed on an inner side of the partition wall20adjacent to the display region101. A second inorganic layer60is disposed on the organic layer50, wherein the organic layer50contacts with a portion of the hydrophobic layer40.

It should be noted that, the organic layer50is mainly formed by inkjet printing. In order to achieve a good leveling effect for the organic layer50, one embodiment of the present invention disposes a partition wall20outside the display region101to ensure a leveling boundary of the ink, and a hydrophobic layer40is disposed on the first inorganic layer30and corresponds to the partition wall20, thereby preventing the ink from overflowing the boundary of the partition wall20and ink sticking on the partition wall20. In addition, since the embodiment of the present invention merely forms one partition wall20on the non-display region102, the frame width of the OLED display panel is scaled down.

Furthermore, referring toFIG. 1andFIG. 2,FIG. 2is a schematic plan view of the OLED display panel according to the embodiment of the present invention. As shown inFIG. 2, the partition wall20and the hydrophobic layer40are both presented as annular structures; that is, the partition wall20and the hydrophobic layer40are both disposed around the periphery of the display region101, and a projection of the hydrophobic layer40on the substrate10covers a projection of the partition wall20.

Specifically, the hydrophobic layer40includes a first hydrophobic block401and a second hydrophobic block402located opposite to each other, and a third hydrophobic block403and a fourth hydrophobic block404located opposite to each other. The first hydrophobic block401, the second hydrophobic block402, the third hydrophobic block403and the fourth hydrophobic block404are interconnected to form an annular structure. In the embodiment, referring toFIG. 3, it is a schematic view showing formation of the hydrophobic layer40of the OLED display panel according to the embodiment of the present invention. As shown inFIG. 3, the first hydrophobic block401is formed opposite to the second hydrophobic block402through the first mask layer405on the non-display region102of the substrate, and the third hydrophobic block403is formed opposite to the fourth hydrophobic block404through the second mask layer406on the non-display region102.

More specifically, the first hydrophobic block401includes a main body portion410, a first end portion411disposed on one side of the main body portion410and a second end portion412disposed on the other side of the main body portion410. The first end portion411and the second end portion412are both disposed on a surface of a side of the main body portion410facing the partition wall20. Likewise, the second hydrophobic block402, the third hydrophobic block403and the fourth hydrophobic block404each include a body portion, a first end portion on one side of the body portion, and a second end portion on the other side of the body portion, and the first end portion and the second end portion are both disposed on a surface of a side of the main body portion facing the partition wall.

In the embodiment, an angle between the first end portion411and the main body portion410is 60 to 120 degrees, and an angle between the second end portion412and the main body portion410is also 60 to 120 degrees. That is, in the embodiment of the present invention, due to a certain angel is formed between the first end portion411and main body portion410and a certain angel is formed between the second end portion412and the main body portion410, the organic layer50is positioned in the middle of the annular structure formed by the first hydrophobic block401, the second hydrophobic block402, the third hydrophobic block403and the fourth hydrophobic block404interconnected to each other.

In the embodiment, material of the hydrophobic layer40is polytetrafluoroethylene.

Referring toFIG. 4, it is another schematic plan view of the OLED display panel according to the embodiment of the present invention. The difference between the OLED display panel shown inFIG. 4and the OLED display panel shown inFIG. 2is that the hydrophobic layer40in the OLED display panel shown inFIG. 4is not presented as an annular structure, but it is disposed at some specific positions, and it also can prevent the ink from overflowing the boundary of the partition wall20and ink sticking on the partition wall20.

As shown inFIG. 1andFIG. 4, the partition wall20includes a first portion201and a second portion202located opposite to each other, a third portion203and a fourth portion204located opposite to each other, a first corner portion205disposed between the first portion201and a third portion203, a second corner portion206disposed between the first portion201and the fourth portion204, a third corner portion207disposed between the second portion202and the third portion203, and a fourth corner portion208disposed between the second portion202and the fourth portion204.

More specifically, the hydrophobic layer40is disposed along the first corner portion205, the second corner portion206, the third corner portion207and the fourth portion208. That is, the embodiment of the present invention merely provides a hydrophobic layer40, such as the first corner portion205, the second corner portion206, the third corner portion207and the fourth portion208, disposed opposite to the partition wall.

Furthermore, the hydrophobic layer40is spaced at intervals along the first portion201, the second portion202, the third portion203and fourth portion204.

The OLED display panel of the present invention improves the ink leveling at edges of the ink and prevents the ink from overflowing by disposing a hydrophobic layer on the first inorganic layer, and the hydrophobic layer is located corresponding to the partition wall, whereby the present invention is beneficial to carry out a narrow-framed display. Moreover, the hydrophobic layer can further prevent external moisture and oxygen from entering the display region through laterals of the partition wall, and thereby to improve the boundary packaging effect.

The OLED display panel and the OLED display device provided by the embodiments of the present invention is described in detail. The principles and embodiments of the present invention are described in detail herein. The description of the above-mentioned embodiments is merely for helping to understand the present invention. Simultaneously, a person skilled in the art can modify the description and application field based on the content of the present invention. Accordingly, the present invention is not deemed as being limited by the content of the specification.