Test Display Panel Including Test Cell

Abstract

A test display panel including a test cell according to the present invention comprises: a test cell including at least one organic light-emitting diode; wherein the test cell comprises: a first electrode including a first partial electrode and a second partial electrode that are spaced apart from each other and electrically insulated; a pixel defining film defining a first opening that exposes a portion of the first partial electrode and a second opening that exposes a portion of the second partial electrode; and an organic light-emitting layer disposed at a portion of the second partial electrode of the first electrode at the second opening. and a second electrode disposed to cover the first opening and the second opening; wherein the second electrode is electrically connected to a part of the first partial electrode through the first opening and electrically connected to the organic light-emitting layer at the second opening, and the first partial electrode defines a first-1 slit and a first-2 slit on a plane and includes a first contact area in which a first jig is contacted in the area between the first-1 slit and the first-2 slit, and the second partial electrode defines a second-1 slit and a second-2 slit and includes a second contact area in which a second jig is contacted in the area between the second-1 slit and the second-2 slit.

Description

Technology Field

[0001] This specification relates to a test display panel including a test cell. Background Technology

[0002] Generally, as is widely known, OLEDs (Organic Light Emitting Diodes) use organic materials as the light-emitting layer, and are called organic light-emitting diodes because the electrical characteristics of the device are similar to those of a diode. Organic light-emitting diodes are formed by depositing multiple layers of organic material between the cathode electrode and the anode electrode, and when voltage is applied, electrons and holes are injected from the cathode and anode and recombine in the organic layers to generate light.

[0003] For materials deposited to form organic light-emitting diodes, a testing process to evaluate the physical properties of each material is essential before they are applied to a display panel, and an operator can perform this testing process using a test display panel containing at least one organic light-emitting diode. The problem to be solved

[0004] The technical objective of the present invention is to provide a test display panel comprising a test cell capable of efficiently performing physical property tests of materials deposited to form an organic light-emitting diode. means of solving the problem

[0005] A test display panel including a test cell according to the present invention comprises: a test cell including at least one organic light-emitting diode; wherein the test cell comprises: a first electrode including a first partial electrode and a second partial electrode that are spaced apart from each other and electrically insulated; a pixel defining film defining a first opening that exposes a portion of the first partial electrode and a second opening that exposes a portion of the second partial electrode; and an organic light-emitting layer disposed at a portion of the second partial electrode of the first electrode at the second opening. and a second electrode disposed to cover the first opening and the second opening; wherein the second electrode is electrically connected to a part of the first partial electrode through the first opening and electrically connected to the organic light-emitting layer at the second opening, and the first partial electrode defines a first-1 slit and a first-2 slit on a plane and includes a first contact area in which a first jig is contacted in the area between the first-1 slit and the first-2 slit, and the second partial electrode defines a second-1 slit and a second-2 slit and includes a second contact area in which a second jig is contacted in the area between the second-1 slit and the second-2 slit.

[0006] The apparatus further comprises a first substrate and a second substrate; and a sealant for bonding the first substrate and the second substrate between the first substrate and the second substrate, wherein the region in which the first substrate and the second substrate are bonded by the sealant is defined as a sealing region, the organic light-emitting diode is located inside the sealing region, and the first electrode is located inside the sealing region and outside the sealing region.

[0007] The first-1 slit, the first-2 slit, the first contact area, the second-1 slit, the second-2 slit, and the second contact area are located outside the sealing area.

[0008] The first contact area is defined by the first-1 slit and the first-2 slit and has a rectangular shape, and the second contact area is defined by the second-1 slit and the second-2 slit and has a rectangular shape, and the first contact area and the second contact area are symmetrical with respect to the area between the first partial electrode and the second partial electrode.

[0009] A low-potential power supply voltage is applied to the first contact area, and a high-potential power supply voltage is applied to the second contact area.

[0010] Two organic light-emitting diodes are arranged along a first direction in the test cell, and two organic light-emitting diodes are arranged along a second direction perpendicular to the first direction, and the first electrode includes four first partial electrodes and four second partial electrodes corresponding to each of the organic light-emitting diodes.

[0011] A low-potential power supply voltage is applied to the first contact region, and a high-potential power supply voltage is applied to the second contact region. The second electrode contacts the first partial electrode at the first opening to receive the low-potential power supply voltage through the first partial electrode, and contacts the organic light-emitting layer at the second opening to form an organic light-emitting diode together with the second partial electrode. Effects of the invention

[0012] A test display panel including a test cell according to the present invention allows an operator to more easily apply voltages for testing to the test display panel, thereby reducing the time required to conduct the test and enabling efficient testing of the physical properties of materials deposited to form an organic light-emitting diode.

[0013] In addition, since the test display panel including the test cell according to the present invention allows an operator to apply voltages for testing to a specific location on the test display panel, it can reduce test errors caused by changes in the location where voltage is applied for testing, thereby having the effect of performing physical property tests on materials deposited to form an organic light-emitting diode more accurately. Brief explanation of the drawing

[0014] FIG. 1 is a schematic cross-sectional view of a test display panel according to one embodiment of the present invention. FIG. 2 is a plan view of a test cell according to one embodiment of the present invention. Figure 3 is a cross-sectional view along I-I' of Figure 2. FIG. 4 is a cross-sectional view of a first electrode according to one embodiment of the present invention. Figure 5 is a plan view of part A of Figure 2. Specific details for implementing the invention

[0015] Throughout the specification, identical reference numbers denote substantially identical components. In the following description, detailed descriptions of components and functions known in the art may be omitted if they are not related to the core components of the invention. The meanings of the terms described in this specification should be understood as follows.

[0016] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0017] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0018] Where terms such as 'comprising,' 'having,' 'consisting of,' etc. are used in this specification, other parts may be added unless 'only' is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0019] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0020] In the case of an explanation of a temporal relationship, for example, when a temporal sequence is explained using 'after', 'following', 'next', 'before', etc., it may include cases where the sequence is not continuous unless 'immediately' or 'directly' is used.

[0021] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of the present invention.

[0022] The term “at least one” should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of “at least one of the first item, the second item and the third item” may mean not only the first item, the second item or the third item individually, but also all combinations of items that can be presented from two or more of the first item, the second item and the third item.

[0023] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0025] Hereinafter, a test display panel according to an embodiment of the present invention will be described with reference to FIG. 1.

[0026] FIG. 1 is a schematic cross-sectional view of a test display panel according to one embodiment of the present invention.

[0027] A test display panel according to one embodiment of the present invention may be a panel for conducting physical property (or reliability) tests of materials (e.g., organic light-emitting materials) deposited to form an organic light-emitting diode (OLED). For example, the test display panel may be an OLED test panel, an OLED test substrate, or an OLED test element group cell. A test display panel according to one embodiment of the present invention may include a test cell (TC) comprising at least one organic light-emitting diode formed by depositing materials to be tested.

[0028] Specifically, as illustrated in FIG. 1, a test display panel according to one embodiment of the present invention includes a first substrate (100), a test cell (TC), a second substrate (200), and a sealant (300).

[0029] The first substrate (110) supports various components of the test display panel. As shown in FIG. 1, the first substrate (110) can support a test cell (TC), a second substrate (200), and a sealant (300).

[0030] The first substrate (110) may be composed of an insulating material. The first substrate (110) may be a glass substrate or a plastic substrate.

[0031] As described above, the test cell (TC) may include at least one organic light-emitting diode.

[0032] Hereinafter, a test cell according to an embodiment of the present invention will be described with reference to FIGS. 2 and FIG. 3. FIG. 2 is a plan view of a test cell according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view along I-I' of FIG. 2.

[0033] According to one embodiment, four organic light-emitting diodes (OLEDs) may be arranged in a 2-row, 2-column configuration on a first substrate (100) as shown in FIG. 2. That is, as two columns of organic light-emitting diodes (OLEDs) are arranged along a first direction (D1) and two rows of organic light-emitting diodes (OLEDs) are arranged along a second direction (D2), one test cell (TC) may include four organic light-emitting diodes (OLEDs). For example, the first substrate (100) may include four pre-set test areas or four test cell areas to test each of the four organic light-emitting diodes (OLEDs).

[0034] As shown in FIGS. 2 and 3, the test cell (TC) includes a first electrode (110), a pixel defining film (120), an organic light-emitting layer (130), and a second electrode (140).

[0035] The first electrode (110) is placed on the first substrate (100). Although FIG. 1 is illustrated as having the test cell (TC) placed only within the sealing area (Encap_Area), which is a region sealed by the first substrate (100) and the second substrate (200) bonded by the sealant (300), according to one embodiment, only some of the test cells (TC) are placed in the sealing area (Encap_Area), and in particular, the first electrode (110) of the test cell (TC) may be placed inside the sealing area (Encap_Area) and outside the sealing area (Encap_Area).

[0036] The first electrode (110) may be formed in a pattern shape on each of the four test areas (or the first to fourth test areas) of the first substrate (100). The first electrode (110) may be the anode of an organic light-emitting diode (OLED). For example, the first electrode (110) may be formed of a material with a high work function so as to supply holes to the organic light-emitting layer (130).

[0037] Hereinafter, with reference to FIG. 4, a stacked structure of a first electrode (110) according to one embodiment of the present invention will be described.

[0038] The first electrode (110) may be configured with a structure in which at least three layers are stacked. For example, the first electrode (110) may be configured with a structure in which a first layer (111), a second layer (112), and a third layer (113) are stacked.

[0039] The first layer (111) is a layer made of a transparent conductive material, and the transparent conductive material may be made of a material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), but is not limited thereto.

[0040] The second layer (112) is a layer made of a highly reflective material, and may be made of a material including one or more of metal materials such as Au, W, Pt, Si, Ir, Ag, Cu, Ni, Ti, or Cr and alloys thereof.

[0041] For example, the second layer (112) may be composed of multiple layers made of different materials with high reflectivity. The second layer (112) may be composed of multiple layers made of different materials with high reflectivity that are alternately stacked.

[0042] The third layer (113) is a layer made of a transparent conductive material, and the transparent conductive material may be made of a material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), but is not limited thereto.

[0043] Hereinafter, with reference to FIG. 5, a planar structure of a first electrode according to an embodiment of the present invention will be described. FIG. 5 is a plan view of part A of FIG. 2.

[0044] Referring to FIG. 5, the first electrode (110) formed in each of the four test regions includes a first partial electrode (110a) and a second partial electrode (110b). At this time, the first partial electrode (110a) and the second partial electrode (110b) may be separated from each other and may be electrically insulated from each other, as shown in FIG. 2. Additionally, the first partial electrode (110a) and the second partial electrode (110b) may have different shapes.

[0045] Referring to FIG. 5, the first partial electrode (110a) may have a shape extending in a trapezoidal form (T1) along the first direction (D1) from the first rectangular electrode (R1), with the diagonal for the first direction (D1) and the second direction (D2) as the boundary. In this case, the first rectangular electrode (R1) may be a rectangular shape in which the length in the second direction (D2) is longer than the length in the first direction (D1). That is, the first rectangular electrode (R1) may be a rectangular shape extended along the second direction (D2). The first partial electrode (110a) may be a shape extended in a trapezoidal form (T1) along the first direction (D1), which is the width direction of the first rectangular electrode (R1).

[0046] Accordingly, the first partial electrode (110a) may have a wider width as it moves further away from the center point (C) of the test cell (TC). That is, the length of the first partial electrode (110a) in the second direction (D2) may become longer as it moves further away from the center point (C) of the test cell (TC).

[0047] Referring again to FIG. 2, according to one embodiment, four first partial electrodes (110a) included in one test cell (TC) may form a pinwheel shape or an X shape. Accordingly, the four first partial electrodes (110a) included in one test cell (TC) may be arranged in a shape that is symmetrical to the origin with respect to the center point (C) of one test cell (TC). For example, adjacent first partial electrodes (110a) may be arranged in a shape rotated 90 degrees relative to each other. The first partial electrode (110a) located to the left of part A in FIG. 2 may be arranged in a shape rotated 90 degrees counterclockwise from the first partial electrode (110a) located in part A, and the first partial electrode (110a) located to the lower side of part A may be arranged in a shape rotated 90 degrees clockwise from the first partial electrode (110a) located in part A. Additionally, the first part electrode (110a) located diagonally to part A can be positioned in a shape that is rotated 180 degrees clockwise or counterclockwise from the first part electrode (110a) located in part A.

[0048] Accordingly, even if the test cell (TC) itself is rotated in 90-degree increments, the first partial electrode (110a) can be positioned in a relatively identical position, making it easy for the operator to perform the test using the first partial electrode (110a), thereby reducing the time required to perform the test.

[0049] The first partial electrode (110a) defines the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2). That is, the first partial electrode (110a) defines the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) by surrounding the sides of the three faces of each of the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2), and each of the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) may be in a form that extends in a straight line along the second direction (D2) in a plane.

[0050] The first partial electrode (110a) includes a first-1 slit (110a_SL1) and a first-2 slit (110a_SL2). The first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) may be formed parallel to each other and spaced apart on one side of the first partial electrode (110a). For example, the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) may be formed in a line shape on one side of the first partial electrode (110a). For example, the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) may be a pair of first slits, a pair of first slit lines, or a pair of first slit patterns.

[0051] According to one embodiment of the present invention, the area between the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) of the first partial electrode (110a) is a first contact area (CNT1), which is an area where a jig is contacted to apply a low potential power supply voltage (or a first test signal or a cathode voltage or a common voltage).

[0052] To this end, according to one embodiment of the present invention, the first-1 slit (110a_SL1), the first-2 slit (110a_SL2), and the first contact area (CNT1) of the first partial electrode (110a) are located outside the sealing area (Encap_Area).

[0053] Additionally, the first contact area (CNT1) is visually distinguished from other areas through the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) of the first partial electrode (110a).

[0054] Accordingly, since it is easy for the operator conducting the test to visually distinguish the first contact area (CNT1) through the first-1 slit (110a_SL1) and the first-2 slit (110a_SL2) of the first partial electrode (110a), the time required to contact the jig that applies a low-potential power supply voltage to the first contact area (CNT1) to conduct the test can be reduced. In addition, since the operator can consistently contact the jig that applies a low-potential power supply voltage to the first contact area (CNT1) of the first partial electrode (110a), errors occurring during the test can be reduced.

[0055] As shown in FIGS. 2 and 3, the first partial electrode (110a) is connected to the second electrode (140) through the first opening (120_H1) of the pixel defining film (120), so that the low potential power supply voltage supplied to the first contact area (CNT1) can be applied to the second electrode (140) through the first partial electrode (110a).

[0056] Referring to FIG. 5, the second partial electrode (110b) may have a shape that extends in a trapezoidal form (T2) along the second direction (D2) from the second rectangular electrode (R2), with the diagonal for the first direction (D1) and the second direction (D2) as the boundary. In this case, the second rectangular electrode (R2) may be a rectangular shape in which the length in the first direction (D1) is longer than the length in the second direction (D2). That is, the second rectangular electrode (R2) may be a rectangular shape that extends along the first direction (D1). The second partial electrode (110b) may be a shape that extends in a trapezoidal form (T2) along the second direction (D2), which is the width direction of the second rectangular electrode (R2).

[0057] Accordingly, the second partial electrode (110b) may have a wider width as it moves further away from the center point (C) of the test cell (TC). That is, the length of the second partial electrode (110b) in the first direction (D1) may become longer as it moves further away from the center point (C) of the test cell (TC).

[0058] At this time, the second rectangular electrode (R2) may have a longer length than the first rectangular electrode (R1) described above. That is, the length of the second rectangular electrode (R2) in the first direction (D1) may be longer than the length of the first rectangular electrode (R1) in the second direction (D2). Accordingly, the second partial electrode (110b) may have a larger area than the first partial electrode (110a).

[0059] Referring again to FIG. 2, according to one embodiment, four second partial electrodes (110b) included in one test cell (TC) may form a pinwheel shape or an X shape. Specifically, adjacent second partial electrodes (110b) may be arranged in a shape rotated 90 degrees relative to each other. For example, the second partial electrode (110b) located to the left of part A in FIG. 2 may be arranged in a shape rotated 90 degrees counterclockwise from the second partial electrode (110b) located in part A, and the second partial electrode (110b) located to the lower side of part A may be arranged in a shape rotated 90 degrees clockwise from the second partial electrode (110b) located in part A.

[0060] Accordingly, even if the test cell (TC) itself is rotated in 90-degree increments, the first partial electrode (110a) can be positioned at a relatively identical location, making it easy for the operator to perform the test using the first partial electrode (110a).

[0061] The second partial electrode (110b) defines the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2). That is, the second partial electrode (110b) defines the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) by surrounding the sides of the three faces of each of the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2), and each of the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) may be in a form that extends in a straight line along the first direction (D1) in a plane.

[0062] The second partial electrode (110b) includes a second-1 slit (110b_SL1) and a second-2 slit (110b_SL2). The second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) may be formed parallel to each other and spaced apart on one side of the second partial electrode (110b). For example, the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) may be formed in a line shape on one side of the second partial electrode (110b). For example, the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) may be a pair of second slits, a pair of second slit lines, or a pair of second slit patterns.

[0063] According to one embodiment of the present invention, the area between the first-1 slit (110b_SL1) and the second-2 slit (110b_SL2) of the second partial electrode (110b) is a second contact area (CNT2), which is an area where a jig is contacted to which a high potential power supply voltage (or a second test signal or anode voltage) is applied.

[0064] To this end, according to one embodiment of the present invention, the second-1 slit (110b_SL1) of the second partial electrode (110b), the second-2 slit (110b_SL2), and the second contact area (CNT2) are located outside the sealing area (Encap_Area).

[0065] Additionally, the second contact area (CNT2) is visually separated from other areas through the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) of the second partial electrode (110b).

[0066] Accordingly, since it is easy for the operator conducting the test to visually distinguish the second contact area (CNT2) through the second-1 slit (110b_SL1) and the second-2 slit (110b_SL2) of the second partial electrode (110b), the time required to contact the jig that applies a high potential power supply voltage to the second contact area (CNT2) to conduct the test can be reduced. In addition, since the operator can consistently contact the jig that applies a high potential power supply voltage to the second contact area (CNT2) of the second partial electrode (110b), errors occurring during the test can be reduced.

[0067] The high potential power supply voltage supplied to the second contact region (CNT2) can be applied to the second partial electrode (110b).

[0068] According to the present invention, in the first electrode (110) formed in each of the four test regions, the first contact region (CNT1) in the first partial electrode (110a) and the second contact region (CNT2) in the second partial electrode (110b) are arranged (or positioned) to be identical or symmetrical to each other with respect to the region between the first partial electrode (110a) and the second partial electrode (110b), thereby minimizing the occurrence of an error in the resistance measurement value during an electrical short test between the first partial electrode (110a) and the second partial electrode (110b) of the first electrode (110), and making it easy to test (or confirm) the presence or absence of a residual film caused by the electrode material between the first partial electrode (110a) and the second partial electrode (110b) of the first electrode (110).

[0069] Referring again to FIG. 3, the pixel defining film (120) is located on the first substrate (100) and the first electrode (110).

[0070] The pixel defining film (120) defines a first opening (120_H1) and a second opening (120_H2). That is, the pixel defining film (120) can be arranged to surround each of the first opening (120_H1) and the second opening (120_H2).

[0071] According to one embodiment, the pixel defining film (120) can define four first openings (120_H1) and four second openings (120_H2) arranged corresponding to each of the four organic light-emitting diodes (OLEDs), as shown in FIG. 2.

[0072] The first opening (120_H1) may expose a portion of the first partial electrode (110a) disposed on the first substrate (100). The exposed portion of the first partial electrode (110a) is electrically connected by contacting a second electrode (140) formed on the pixel defining film (120), and a low potential power supply voltage supplied through the first contact area (CNT1) of the first partial electrode (110a) may be applied to the second electrode (140).

[0073] The second opening (120_H2) may expose a portion of the second partial electrode (110b) disposed on the first substrate (100). The exposed portion of the second partial electrode (110b) comes into contact with and is electrically connected to the organic light-emitting layer (130) formed on the pixel defining film (120). In particular, an organic light-emitting diode (OLED) may be formed in the second opening (120_H2) by stacking the second partial electrode (110b) receiving a high potential power supply voltage, the organic light-emitting layer (130), and the second electrode (140) receiving a low potential power supply voltage. Accordingly, when a high potential power supply voltage is applied to the second partial electrode (110b) and a low potential power supply voltage is applied to the second electrode (140), light is emitted from the organic light-emitting diode (OLED) formed in the second opening (120_H2).

[0074] The pixel defining film (120) may be formed from an organic insulating material. For example, the pixel defining film (120) may be made of one or more materials selected from polyimide, photoacrylic, benzocyclobutene (BCB), etc. The pixel defining film (120) may be formed in a tapered shape.

[0075] Referring to FIG. 3, the organic light-emitting layer (130) is positioned on the second partial electrode (110b) at the second opening (120_H2) and positioned below the second electrode (140). When a high-potential power supply voltage is applied to the second partial electrode (110b) to inject holes into the organic light-emitting layer (130), and a low-potential power supply voltage is applied to the second electrode (140) through the first partial electrode (110a) to inject electrons into the organic light-emitting layer (130), light can be emitted by the recombination of electrons and holes in the organic light-emitting layer (130) and the fluorescent or phosphorescent material emitting light. That is, when a low-potential power supply voltage is applied to the second partial electrode (110b) and a high-potential power supply voltage is applied to the second electrode (140), light is emitted from the organic light-emitting diode (OLED) composed of the second partial electrode (110b), the organic light-emitting layer (130), and the second electrode (140).

[0076] The organic light-emitting layer (130) may be configured to emit light of any one of red, green, blue, and white. The organic light-emitting layer (130) may be composed of a single light-emitting layer, but may also have a stacked structure in which multiple light-emitting layers emitting light of different colors are stacked with a charge-generating layer in between.

[0077] Additionally, although not shown, at least one organic layer such as a hole transport layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole injection layer, or an electron injection layer may be further disposed between the second partial electrode (110b) and the organic light-emitting layer (130) or between the organic light-emitting layer (130) and the second electrode (140). Such organic layers can easily transport or inject electrons or holes and regulate the charge balance of electrons and holes, thereby further improving the luminous efficiency of the organic light-emitting layer (130).

[0078] Referring to FIG. 3, a second electrode (140) is disposed on a first substrate (100) on which a first electrode (110), a pixel defining film (120), and an organic light-emitting layer (130) are formed. The second electrode (140) supplies electrons to the organic light-emitting layer (130). For example, the second electrode (140) may be formed from a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), and tin oxide (TO), or from an ytterbium (Yb) alloy. However, it is not limited thereto, and the second electrode (140) may be formed from a metallic material including calcium (Ca), barium (Ba), aluminum (Al), silver (Ag), etc. If the second electrode (140) is formed from such a metallic material, it may be formed with a very thin thickness and be substantially transparent. Additionally, the second electrode (140) may not be patterned and may be formed as a single layer on the first electrode (110). That is, the second electrode (140) may not be formed separately from the first electrode (110) and may be formed as a single layer.

[0079] As illustrated in FIG. 3, the second electrode (140) may be positioned to cover the first opening (120_H1) and the second opening (120_H2). Specifically, the second electrode (140) may be formed on the first opening (120_H1) and electrically connected to the first partial electrode (110a) exposed by the first opening (120_H1). Additionally, the second electrode (140) may be formed on the second opening (120_H2) and electrically connected to the organic light-emitting layer (130) in the second opening (120_H2).

[0080] The second substrate (200) may be configured to seal a test cell (TC) on the first substrate (100). For example, the second substrate (200) may be positioned to overlap with the organic light-emitting diodes (OLEDs) to seal the organic light-emitting diodes (OLEDs) placed on the first substrate (100).

[0081] The second substrate (200) may be composed of an insulating material, similar to the first substrate (100). That is, the second substrate (200) may be a glass substrate or a plastic substrate.

[0082] The sealant (300) bonds the first substrate (100) and the second substrate (200) together to block moisture and oxygen penetrating from the sides, thereby sealing the organic light-emitting diode (OLED) located within the sealing area (Encap_Area). To this end, the sealant (300) may be positioned to surround the organic light-emitting diodes (OLED) placed on the first substrate (100) in a planar manner. For example, the sealant (300) may be positioned in a planar manner to surround the sealing area (Encap_Area) containing the organic light-emitting diodes (OLED).

[0083] In particular, according to one embodiment of the present invention, the sealant (300) may be positioned to contact the first substrate (100) and the first electrode (110), and to contact the second substrate (200). Although FIG. 1 shows the test cell (TC) being positioned only in a location surrounded by the sealant (300), the first electrode (110) of the test cell (TC) may be positioned inside and outside the sealing area (Encap_Area). Specifically, the first-1 slit (110a_SL1), the first-2 slit (110a_SL2) and the first contact area (CNT1) of the first partial electrode (110a), and the second-1 slit (110b_SL1), the second-2 slit (110b_SL2) and the second contact area (CNT2) of the second partial electrode (110b) may be located outside the sealing area (Encap_Area) to receive a low potential power supply voltage and a high potential power supply voltage for testing from the jig, respectively. Accordingly, the sealant (300) may be placed overlapping at least a portion of the first partial electrode (110a) and at least a portion of the second partial electrode (110b).

[0084] Referring again to FIG. 1, a getter (210) may be placed between the first substrate (100) and the second substrate (200). For example, the getter (210) may be attached to the second substrate (200). The getter can more effectively block moisture and oxygen from penetrating from the outside by absorbing moisture or hindering the progress of moisture and oxygen.

[0085] The getter (210) is a substance that absorbs residual gas or forms a compound with that gas, and is not limited to any type as long as it can absorb residual moisture or oxygen contained on the adhesive film or react with it to form a compound, but, for example, it may be at least one of activated carbon, barium, magnesium, zirconium and red phosphorus.

[0086] Additionally, although not shown, a filling portion may be further disposed between the organic light-emitting diode (OLED) located on the first substrate (100) and the second substrate (200) together with the getter (210). The filling portion may have properties that block moisture. Accordingly, the penetration of moisture and oxygen can be suppressed.

[0087] Alternatively, although not illustrated, the getter (210) may be positioned in a dispersed form in a resin in the space between the first substrate (100) and the second substrate (200). For example, the getter may be dispersed and disposed in a resin composition having moisture-blocking properties, and such resin composition may be a transparent adhesive resin capable of adhering the second substrate (200) to an organic light-emitting diode (OLED) located on the first substrate (100).

[0089] Those skilled in the art to which the present invention pertains will understand that the above-described invention may be implemented in other specific forms without altering its technical concept or essential features.

[0090] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the invention. Explanation of the symbols

[0091] 100: First substrate TC: Test cell 200: Second substrate 300: Sealant

Claims

Claim 1 A test cell comprising at least one organic light-emitting diode, wherein the test cell comprises: a first electrode comprising a first partial electrode and a second partial electrode that are spaced apart from each other and electrically insulated; a pixel defining film defining a first opening that exposes a portion of the first partial electrode and a second opening that exposes a portion of the second partial electrode; and an organic light-emitting layer disposed at a portion of the second partial electrode of the first electrode at the second opening. and includes a second electrode disposed to cover the first opening and the second opening, wherein the second electrode is electrically connected to a part of the first partial electrode through the first opening and is electrically connected to the organic light-emitting layer at the second opening, wherein the first partial electrode defines a first-1 slit and a first-2 slit on a plane and includes a first contact area which is an area where a first jig is contacted in the region between the first-1 slit and the first-2 slit, and the second partial electrode defines a second-1 slit and a second-2 slit and includes a second contact area which is an area where a second jig is contacted in the region between the second-1 slit and the second-2 slit, wherein a low-potential power supply voltage is applied to the first contact area and a high-potential power supply voltage is applied to the second contact area, and the second electrode contacts the first partial electrode at the first opening and the low-potential power supply through the first partial electrode A test display panel that receives a voltage and forms an organic light-emitting diode together with the second partial electrode by contacting the organic light-emitting layer at the second opening. Claim 2 A test display panel according to claim 1, further comprising: a first substrate and a second substrate; and a sealant for bonding the first substrate and the second substrate between the first substrate and the second substrate, wherein the region in which the first substrate and the second substrate are bonded by the sealant is defined as a sealing region, the organic light-emitting diode is located inside the sealing region, and the first electrode is located inside the sealing region and outside the sealing region. Claim 3 In paragraph 2, the test display panel, wherein the first-1 slit, the first-2 slit, the first contact area, the second-1 slit, the second-2 slit, and the second contact area are located outside the sealing area. Claim 4 A test display panel according to claim 2, wherein two organic light-emitting diodes are arranged along a first direction in the test cell, and two organic light-emitting diodes are arranged along a second direction perpendicular to the first direction, and the first electrode includes four first partial electrodes and four second partial electrodes corresponding to each of the organic light-emitting diodes. Claim 5 In claim 4, the test display panel, wherein the four first partial electrodes corresponding to each of the four organic light-emitting diodes are arranged in a pinwheel shape or an X shape that is origin-symmetric with respect to the center point of the test cell. Claim 6 A test display panel according to any one of claims 2 to 5, wherein the first contact area is defined by the first-1 slit and the first-2 slit and has a rectangular shape, the second contact area is defined by the second-1 slit and the second-2 slit and has a rectangular shape, and the first contact area and the second contact area are symmetrical with respect to the area between the first partial electrode and the second partial electrode.

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