KR102056666B1 - ORGANIC LIGHT EMITTING DISPLAY DEVICE and MANUFACTURING METHOD OF THE SAME - Google Patents

Abstract

According to an embodiment of the present disclosure, an organic light emitting display device in which a display area in which an image is displayed and a non-display area that is an outside of the display area is defined, wherein the non-display area corresponds to each corner of the outside of the display area. A first dummy region including a first dummy region, a second dummy region corresponding to an outer edge of the first dummy region including the display region, and a third dummy region other than the first and second dummy regions; A bank formed on the first substrate to correspond to the periphery of each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions; A light emitting layer formed of a light emitting organic material on the first substrate corresponding to each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions; And a second substrate formed to be bonded to the first substrate through a sealing layer formed to correspond to the third dummy region to seal the light emitting layer of each of the plurality of pixel regions. .

Description

Organic light emitting display device and manufacturing method thereof {ORGANIC LIGHT EMITTING DISPLAY DEVICE and MANUFACTURING METHOD OF THE SAME}

The present invention relates to an organic light emitting display device and a method of manufacturing the same that can improve image quality.

As the information age enters full swing, the display field for visually displaying electrical information signals is rapidly developing. Accordingly, researches for developing performances such as thinning, weight reduction, and low power consumption for various flat panel display devices have been continued.

Representative examples of such flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), field emission display devices (FEDs), and electroluminescent displays. Electroluminescent display device (ELD), electro-wetting display device (EWD), and organic light emitting display device (OLED).

Among these, an organic light emitting display device (hereinafter, referred to as "OLED") is a device that displays an image using an organic light emitting diode (OLED) which is a self-luminous type device. Such an OLED includes two or more organic light emitting devices that emit light of different colors corresponding to each unit pixel, and thus has an advantage of realizing a color image without a separate color filter. In addition, since a separate light source is not required, an advantage of miniaturization, thinning, and weight reduction than a liquid crystal display device, a wide viewing angle, and a reaction speed of more than 1000 times are provided, resulting in less afterimage.

On the other hand, the organic light emitting device includes a light emitting layer interposed between the first and second electrodes facing each other. Such an organic light emitting device emits a color corresponding to the material of the light emitting layer.

Accordingly, the light emitting layers of the plurality of organic light emitting diodes are formed for the same material by using a patterning method such as a fine metal mask (FMM) and an inkjet printing technique.

The FMM patterning method is a method of forming a pattern layer by depositing a material on a target region with a deposition mask including a fine pattern. The pattern accuracy is relatively high, but requires a separate mask and faces There is a disadvantage in that it is difficult to reduce the integration and process costs.

The inkjet printing method is a method of forming a pattern layer by drying the discharged liquid material after discharging the liquid material to the target area with droplets of several to several tens of pl (pico liter) along the fine pattern using a fine nozzle. Since it does not require a mask, there are advantages that are advantageous for large area and low process cost.

However, the inkjet printing method has problems such as unstable initial ejection operation in which the nozzle starts discharging the liquid material, that is, unstable straight movement of the nozzle, inconsistent discharge amount of the liquid material, or less than the designed amount. have.

In addition, when the discharged liquid material is dried, there is a problem in that the edge portion of the target region is placed in a different dry atmosphere from the center portion. That is, the liquid material discharged to the center portion of the target region is placed in a dry atmosphere in which the solvent is saturated due to the solvent vaporized from other liquid materials surrounding the surrounding. On the other hand, since the solvent vaporized from the liquid material discharged to the edge of the target region can be easily discharged out of the target region, the liquid material discharged to the edge of the target region is placed in a dry atmosphere in which the solvent is not saturated. .

Accordingly, the pattern corresponding to the initial operation of the nozzle in the target region or the partial region in which the solvent can be easily discharged is formed differently from the pattern of the other partial region, so that the uniformity of the pattern is reduced. That is, in the case of forming the light emitting layer using the inkjet printing method, since the uniformity of the light emitting layer is lowered, the organic light emitting element corresponding to each pixel area of the display area exhibits low uniformity luminance characteristics. As a result, the pixel area of the organic light emitting device having lower luminance characteristics than that of other organic light emitting devices is darker than other pixel areas, so that the pixel area is easily exposed.

1 illustrates a luminance of some pixel areas corresponding to an edge of a display area in a general organic light emitting display device including a light emitting layer formed by inkjet printing.

As shown in Fig. 1, when the light emitting layer is formed by an inkjet printing method, some of the pixel areas of the display area AA, which are arranged at the edge portion ① adjacent to the non-display area NA, are located in the middle of the inside thereof. By showing a lower luminance characteristic than some of the other pixel areas arranged in the portion (2), it can be seen that the appearance is dark and uneven.

The present invention is to provide an organic light emitting display device and a method of manufacturing the same that can form a light emitting layer using an inkjet printing method, and can prevent uneven phenomenon.

In order to solve such a problem, an exemplary embodiment of the present invention provides an organic light emitting display device in which a display area in which an image is displayed and a non-display area that is an outer portion of the display area are defined. A first dummy area corresponding to each corner of the second dummy area, a second dummy area corresponding to an outer edge of the first dummy area, and a third dummy area remaining except for the first and second dummy areas; A first substrate defining a plurality of pixel regions arranged in a matrix, a plurality of dummy pixel regions arranged in a matrix in the first dummy region, and a plurality of dummy pattern regions arranged in a matrix in the second dummy region; A bank formed on the first substrate to correspond to the periphery of each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions; A light emitting layer formed of a light emitting organic material on the first substrate corresponding to each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions; And a second substrate formed to be bonded to the first substrate through a sealing layer formed to correspond to the third dummy region to seal the light emitting layer of each of the plurality of pixel regions. .

An embodiment of the present invention provides a method of manufacturing an organic light emitting display device in which a display area in which an image is displayed and a non-display area that is an outside of the display area are defined. A first dummy region corresponding to an edge, a second dummy region corresponding to an outer periphery of the first dummy region, and a third dummy region other than the first and second dummy regions, and having a matrix arranged in the display region. Providing a first substrate having a plurality of pixel regions, a plurality of dummy pixel regions arranged in a matrix in the first dummy region, and a plurality of dummy pattern regions arranged in a matrix in the second dummy region; Forming a bank on the first substrate, the bank corresponding to the periphery of each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions; Forming a light emitting layer corresponding to each of the plurality of pixel regions, the plurality of dummy pixel regions, and the plurality of dummy pattern regions, on the first substrate using a light emitting organic light emitting material; And sealing the light emitting layers of each pixel region by bonding the first substrate and the second substrate to each other through a sealing layer formed corresponding to the third dummy region. to provide.

An organic light emitting display device according to an exemplary embodiment of the present invention includes a first dummy area corresponding to each corner of the outside of the display area as well as a display area, and a second dummy area corresponding to the outside of the first dummy area including the display area. A light emitting layer corresponding to each dummy region is included.

That is, when the light emitting layer is formed by the inkjet printing method, the target region where the light emitting liquid material is discharged and dried is not limited to the display region where the organic light emitting element is formed and the first dummy region, but extends to the second dummy region. It is possible to prevent the light emitting layer of low uniformity from being formed in the display area. Therefore, unevenness of the display area and the deterioration of image quality can be prevented.

The method of manufacturing an organic light emitting display device according to an exemplary embodiment of the present disclosure includes forming a light emitting layer corresponding to the display area, the first and second dummy areas. In this case, the forming of the light emitting layer may include discharging the liquid material including the luminescent organic material to a target area including the display area and the first and second dummy areas, and then drying the discharged liquid material.

As a result, the liquid material may be discharged in the second dummy area at the initial stage when the discharge amount is not constant, and the liquid material may be discharged in the display area after the discharge amount is constant.

The liquid material discharged to the edge of the display area is a solvent similar to the liquid material discharged to the center of the display area by a solvent vaporized from the liquid material discharged to the first or second dummy area surrounding the display area. Can be dried in a saturated atmosphere.

Therefore, even when the light emitting layer is formed using the inkjet printing method, due to the disadvantage of the inkjet printing method, it is possible to prevent the light emitting layer corresponding to each pixel area of the display area from being formed with low uniformity, thereby causing unevenness in the display area and The deterioration of image quality can be prevented.

1 illustrates a luminance of some pixel areas corresponding to an edge of a display area in a general organic light emitting display device including a light emitting layer formed by inkjet printing.
2 is a plan view illustrating an organic light emitting display device according to an exemplary embodiment of the present disclosure.
3 is a plan view illustrating a pixel area, a dummy pixel area, and a dummy pattern area corresponding to part II of FIG. 2.
4 is a cross-sectional view illustrating III-III ′ of FIG. 3.
FIG. 5 is a plan view illustrating a wiring part corresponding to part II of FIG. 2.
6 is a cross-sectional view of an organic light emitting diode according to an embodiment of the present disclosure.
7 is a cross-sectional view showing a dummy pattern according to an embodiment of the present application.
8 is a flowchart illustrating a method of manufacturing an organic light emitting display device according to an embodiment of the present disclosure.
FIG. 9 is a flowchart illustrating detailed steps of forming an emission layer of FIG. 8.
10, 11A-11E, 12A-12G, 13 and 14 are process diagrams showing the respective steps shown in FIGS. 8 and 9.
FIG. 15 illustrates luminance of some pixel areas corresponding to an edge of the display area in the organic light emitting diode display according to the exemplary embodiment.

Hereinafter, an organic light emitting display device and a method of manufacturing the same according to an exemplary embodiment will be described in detail with reference to the accompanying drawings.

First, an organic light emitting display device according to an exemplary embodiment of the present disclosure will be described with reference to FIGS. 2 to 7.

2 is a plan view illustrating an organic light emitting display device according to an exemplary embodiment of the present disclosure. 3 is a plan view illustrating a pixel region, a dummy pixel region, and a dummy pattern region corresponding to part II of FIG. 2, and FIG. 4 is a cross-sectional view illustrating III-III ′ of FIG. 3. 5 is a plan view illustrating a wiring part corresponding to part II of FIG. 2. 6 is a cross-sectional view showing an organic light emitting device according to an embodiment of the present application, Figure 7 is a cross-sectional view showing a dummy pattern according to an embodiment of the present application.

As shown in FIG. 2, the organic light emitting display device 100 according to an exemplary embodiment of the present disclosure has a display area AA in which an image is displayed, and a non-display area NA outside the display area AA. Non-active Area is defined.

The non-display area NA includes a first dummy area DA1 corresponding to each edge of the outside of the display area AA, each vertex of the outside of the display area AA, and the first dummy area DA1. A second dummy area DA2 corresponding to the outer portion, and a third dummy area DA3 other than the first and second dummy areas DA1 and DA2 are included.

The first dummy area DA1 is an area corresponding to the periphery of each edge of the outside of the display area AA in a form including each edge of the outside of the display area AA and an opposite edge thereof. For example, when the display area AA has a rectangular shape, four first dummy areas DA1 extending from upper, lower, left, and right edges of the outside of the display area AA are disposed.

The second dummy area DA2 corresponds to a periphery of the outer periphery of the first dummy area DA1 including the display area AA. That is, the second dummy area DA2 is formed around the edge of the first dummy area DA1 that is not adjacent to the display area AA and outside the display area AA that is not adjacent to the first dummy area DA1. The area around each vertex of.

The third dummy area DA3 is an area corresponding to the periphery of the outside of the second dummy area DA2 including the display area AA and the first dummy area DA1.

As shown in FIG. 3, the display area AA includes a plurality of pixel areas PA arranged in a matrix. Here, the plurality of pixel areas PA correspond to a plurality of organic light emitting diodes (not shown). Accordingly, the plurality of organic light emitting diodes are selectively driven to selectively emit light in the plurality of pixel areas PA, thereby implementing image display in the display area AA.

The plurality of organic light emitting diodes may emit one of red, green, and blue light, respectively. Thus, each of the plurality of pixel areas may be an area that emits any one of red, green, and blue. That is, three pixel areas corresponding to each unit pixel among the plurality of pixel areas may be areas that emit red, green, and blue light.

Alternatively, although not illustrated in FIG. 3, each of the plurality of pixel areas may be an area emitting one of red, green, blue, and white light. In this case, four pixel areas corresponding to each unit pixel may be areas emitting red, green, blue, and white light.

The first dummy area DA1 of the non-display area NA includes a plurality of dummy pixel areas DP arranged in a matrix. Here, the plurality of dummy pixel areas corresponds to a plurality of dummy elements (not shown).

Each of the plurality of dummy elements is the same as the organic light emitting element of the display area AA. This dummy element is not intended to display an image, but to test element characteristics in place of the organic light emitting element in the display area AA.

The second dummy area DA2 includes a plurality of dummy pattern areas DT arranged in a matrix. In this case, the plurality of dummy pattern regions correspond to a plurality of dummy patterns (not shown).

Each of the plurality of dummy patterns may be the same as the organic light emitting diode of the display area AA or includes only a part of the organic light emitting diode formed by inkjet printing. This dummy pattern will be described in more detail below.

As shown in FIG. 4, the organic light emitting display device 100 according to an exemplary embodiment of the present disclosure includes a first substrate 110, a bank 120, an emission layer 130, a sealing layer 140, and a second substrate ( 150).

The first substrate 110 defines a plurality of pixel areas PA corresponding to the display area AA, and defines a plurality of dummy pixel areas DP corresponding to the first dummy area DA1. In addition, the first substrate 110 may define a plurality of dummy pattern areas DT corresponding to the second dummy area DA2.

That is, although not specifically illustrated in FIG. 4, the first substrate 110 is formed on the support substrate (not shown) and the display region AA of the support substrate to define the plurality of pixel regions PA. A cell array (not shown) for selectively driving a plurality of organic light emitting diodes (not shown) corresponding to the plurality of pixel areas PA is included. Here, the cell array includes gate lines and data lines formed in directions crossing each other and defining a plurality of pixel regions, and a plurality of switching elements formed corresponding to the plurality of pixel regions at intersections thereof.

The first substrate 110 is formed on the first dummy area DA1 of the support substrate to define a plurality of dummy pixel areas DP, and a plurality of dummy corresponding to the plurality of dummy pixel areas DP. A dummy cell array (not shown) for selectively driving a device (not shown) is further included. Here, the dummy cell array is formed in the direction crossing each other, similarly to the cell array of the display area AA, and the dummy gate line and the dummy data line defining a plurality of dummy pixel areas, and a plurality of dummy pixels in the intersection area thereof. And a plurality of dummy switching elements formed corresponding to the regions.

The bank 120 is formed of a hydrophobic material on the first substrate 110 to correspond to the periphery of each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT. . That is, the bank 120 is formed on the display area AA of the first substrate 110 to correspond to the outside of the plurality of pixel areas PA, and the first dummy area DA1 of the first substrate 110 is formed. On the second dummy area DA2 of the first substrate 110, a plurality of dummy pattern areas DT are formed on the second dummy area DA2.

The bank 120 divides each pixel area PA, each dummy pixel area DP, and each dummy pattern area DT, and the light emitting layer 130 to be described later includes each pixel area PA and each dummy pixel area. It is used as a partition for forming in DP and each dummy pattern area DT.

The emission layer 130 is formed of a light emitting organic material on the first substrate 110 to correspond to each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT. .

That is, the emission layer 130 of the display area AA is formed on the first substrate 110 exposed between the banks 120 so as to correspond to each pixel area PA divided by the banks 120. The light emitting layer 130 of the first dummy area DA1 is formed on the first substrate 110 exposed between the banks 120 so as to correspond to each dummy pixel area DP divided by the bank 120. do. Similarly, the emission layer 130 of the second dummy area DA2 is formed on the first substrate 110 exposed between the banks 120 so as to correspond to each dummy pattern area DT divided by the banks 120. do.

In this case, each of the light emitting layers 130 of the plurality of pixel areas PA and the plurality of dummy pixel areas DP emits red, green, and blue colors different from each other. It may be formed of any one of the third organic light emitting material.

That is, the light emitting layer 130 of each of the plurality of pixel areas PA and the plurality of dummy pixel areas DP may include a first light emitting layer 130R formed of a red light emitting first organic light emitting material and a second light emitting second organic light. Any one of the second light emitting layer 130G formed of the light emitting material and the third light emitting layer 130B formed of the third organic light emitting material having blue light emission.

The light emitting layer 130 of each of the plurality of dummy pattern regions DT may include inkjets among first, second, and third organic light emitting materials emitting red, green, and blue colors. It can be formed with at least one that can be patterned in a printing manner.

For example, when only the first red organic light emitting material and the second green organic light emitting material may be patterned by an inkjet printing method, as shown in FIG. 4, each of the plurality of dummy pattern areas DT may emit light. Reference numeral 130 is any one of a red luminous first light emitting layer 130R and a green luminous second light emitting layer 130G. In this case, some of the plurality of dummy pattern regions DT may not include the emission layer 130.

Alternatively, although not separately illustrated, when the first organic light emitting material of red color, the second organic light emitting material of green color and the third organic light emitting material of blue color may all be patterned by inkjet printing, a plurality of dummy patterns Each of the light emitting layers 130 of the region DT is similar to the plurality of pixel areas PA and the plurality of dummy pixel areas DP, and the first light emitting layer 130R having a red light emission and the second light emitting layer 130G having a green light emission may be formed. And the blue light emitting third light emitting layer 130B.

The sealing layer 140 may be formed to correspond to the third dummy area DA3.

The second substrate 150 is formed by being bonded to the first substrate 110 through the sealing layer 140. In this way, the light emitting layer 130 disposed in the inner spaces of the first and second substrates 110 and 150 facing to each other through the sealing layer 140 may be blocked from external moisture and oxygen.

In addition, as illustrated in FIG. 5, the first substrate 110 may further include a wiring part 112 formed on the second or third dummy areas DA2 and DA3 of the support substrate 111. . Here, the wiring unit 112 includes a plurality of power wirings 112a, 112b, and 112c connected to an external power source and supplying various kinds of power to the cell array and the dummy cell array. For example, the wiring unit 112 may include a wiring 112a for supplying a reference power, a wiring 112b for supplying a source power, and a wiring 112c for supplying a drain power to the cell array and the dummy cell array. Can be.

Although not shown in detail in FIG. 5, the first substrate 110 is a gate driver provided in a GIP form on the second or third dummy regions DA2 and DA3 of the support substrate 111. It may further include. Here, the gate driver is a circuit for driving the gate line of the cell array and the dummy gate line of the dummy cell array.

In addition, the first substrate 110 may further include an uppermost interlayer insulating layer to insulate the cell array, the dummy cell array, the wiring unit 112, the gate driver, and the like from the outside from the outside of the support substrate 111.

Accordingly, in the second or third dummy regions DA2 and DA3, the wiring part 112 is formed under the interlayer insulating layer of the first substrate 110, and the plurality of dummy patterns DT are formed on the first substrate ( On the interlayer insulating layer of 110, it may be formed to at least partially overlap the wiring portion 112.

As shown in FIG. 6, in the display area AA, an organic light emitting element D is formed on the first substrate 110 in correspondence with each pixel area PA.

The organic light emitting diode D includes a light emitting layer 130 formed of a light emitting organic material between the first and second electrodes 141 and 142 and the first and second electrodes 141 and 142 which are formed to face each other. do. The organic light emitting diode D may further include a hole injection layer 131 and a hole transport layer 132 formed between the first electrode 141 and the light emitting layer 130, and between the light emitting layer 130 and the second electrode 142. It further includes an electron transport layer 133 and the electron injection layer 134 formed on.

The light emitting layer 130 of each organic light emitting diode D may be any one of a red light emitting first light emitting layer 130R, a green light emitting second light emitting layer 130G, and a blue light emitting third light emitting layer 130B. .

The organic light emitting device (D) is injected through the first and second electrodes (141, 142) and the electrons and holes transferred to the light emitting layer 130 to recombine in the light emitting layer 130 to generate excitons (exciton), The luminescent organic material constituting the light emitting layer 130 reacts with the extra energy generated when the excitons fall to the ground state to drive the light in the wavelength region corresponding to the specific color. .

Meanwhile, at least one of the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection layer 134 corresponds to each pixel area PA using an inkjet printing method. It is formed so as to be patterned. This will be described below in detail as a method of manufacturing an organic light emitting display device.

Although not separately illustrated, in the first dummy area DA1, a dummy element (not shown) is formed on the first substrate 110 to correspond to each dummy pixel area DP.

Since the dummy device (not shown) is the same as the organic light emitting device D of FIG. 6 except that the dummy device is formed in the first dummy area DA1, the overlapping description will be omitted.

As shown in FIG. 7, in the second dummy area DA2, a dummy pattern Dm is formed on the first substrate 110 corresponding to each dummy pattern area DT.

The dummy pattern Dm is an inkjet printing method among the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection layer 134 included in the organic light emitting diode D. At least one formed.

For example, the hole injection layer 131 of the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection layer 134 included in the organic light emitting device D, When the hole transport layer 132 and the light emitting layer 130 are patterned and formed by an inkjet printing method, as shown in FIG. 7, the dummy pattern Dm may include the hole injection layer 131, the hole transport layer 132, and the light emitting layer 130. ).

In addition, when the red light-emitting first light emitting layer 130R and the green light-emitting second light emitting layer 130G of the organic light emitting element D of the organic light emitting layer 130 are patterned and formed by an inkjet printing method, as shown in FIG. Likewise, the light emitting layer 130 of the dummy pattern Dm is one of the first light emitting layer 130R and the second light emitting layer 130G.

And, among the light emitting layers 130 of each organic light emitting device D, the blue light emitting third light emitting layer 130B is formed by being patterned by an inkjet printing method, or if not, a part of the light emitting layer 130 of the dummy pattern Dm. In addition to the third light emitting layer 130B of each organic light emitting device D, the first light emitting layer 130B may be formed of a blue light emitting layer 130B. In this case, the light emitting layer 130 of the dummy pattern Dm is any one of the first light emitting layer 130R, the second light emitting layer 130G, and the third light emitting layer 130B.

In addition, although not separately illustrated, the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection layer 134 included in the organic light emitting diode D are all inkjet. When the pattern is formed by a printing method, the dummy pattern Dm may be formed in the same manner as the organic light emitting device D, including the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection. It may also include layer 134.

In addition, the dummy pattern Dm may further include a first electrode 141 formed on each dummy pattern area DT of the first substrate 110. Alternatively, the dummy pattern Dm may be formed to face each other with at least one of the hole injection layer 131, the hole transport layer 132, the light emitting layer 130, the electron transport layer 133, and the electron injection layer 134 interposed therebetween. It may further include the first and second electrodes (141, 142).

Next, referring to FIGS. 8, 9, 10, 11a to 11e, 12a to 12g, 13, 14 and 15, a method of manufacturing an organic light emitting display device according to an embodiment of the present application. Explain about.

8 is a flowchart illustrating a method of manufacturing an organic light emitting display device according to an exemplary embodiment of the present disclosure, and FIG. 9 is a flowchart illustrating detailed steps of forming an emission layer of FIG. 8. 10, 11A to 11E, 12A to 12G, 13 and 14 are process diagrams showing the respective steps shown in FIGS. 8 and 9.

As mentioned above, the dummy pixel corresponding to each dummy pixel area DP of the first dummy area DA1 is the same as the organic light emitting device D corresponding to each pixel area PA of the display area AA. 10, 11A, 11C, 11D, 11E, 12A, 12C, 12D, 12F, 12G, 13, and 14 show each pixel area PA of the display area AA. ) And only the dummy pattern area DT of the second dummy area DA2, and the illustration of each dummy pixel area DP of the first dummy area DA1 is omitted.

As shown in FIG. 8, the method of manufacturing an organic light emitting display device according to an exemplary embodiment of the present disclosure includes preparing a first substrate (S100), forming a first electrode on the first substrate (S110), Forming a bank on the first substrate (S120), forming a hole injection layer on the first electrode (S130), forming a hole transport layer on the hole injection layer (S140), a light emitting layer on the hole transport layer Forming (S150), forming an electron transport layer on the light emitting layer (S160), forming an electron injection layer on the electron transport layer (S170), on the electron injection layer, a second electrode facing the first electrode Forming an electrode (S180), and bonding the first substrate and the second substrate to each other through a sealing layer (S190).

As shown in FIG. 9, in the forming of the light emitting layer of FIG. 8, in operation S150, the first light emitting liquid material including the organic light emitting material emitting one of red and green is discharged onto a part of the first substrate. In step S151, drying the discharged first light emitting liquid material to form a first light emitting layer (S152), a second light emitting liquid material including an organic light emitting material for emitting another one of red and green Discharging onto the other part of the substrate (S153), drying the discharged second light emitting liquid material to form a second light emitting layer (S154), and forming a third light emitting layer from an organic light emitting material emitting blue light. Step S155 is included.

Although not separately illustrated, in the step S100 of preparing the first substrate, the first substrate 110 is formed in the support substrate (not shown) and the display region AA of the support substrate to form a plurality of pixel regions PA. Cell array defining a plurality of dummy pixel areas DP formed in the first dummy area DA1 of the support substrate and a plurality of dummy cells defined in the second dummy area DA2 of the support substrate. The dummy pattern area DT is included. The first substrate may further include a wiring part 112 and a gate driver formed in the second or third dummy regions DA2 and DA3 of the support substrate. The first substrate may further include an interlayer insulating layer covering the cell array, the dummy cell array, the wiring unit 112, and the gate driver on the front surface of the support substrate.

As shown in FIG. 10, the first electrode 141 is formed on the first substrate 110 (S110), and the bank 120 is formed. (S120)

In detail, in operation S110 of forming the first electrode 141, a plurality of pixel areas PA and a plurality of pixels are disposed on the display area AA and the first dummy area DA1 of the first substrate 110. The first electrode 141 corresponding to each of the dummy pixel areas DP of is formed.

In this case, the plurality of dummy pattern regions on the second dummy region DA2 of the first substrate 110 together with the first electrodes 141 of the plurality of pixel regions PA and the plurality of dummy pixel regions DP, respectively. The first electrode 141 corresponding to each of the DT may be further formed.

In the forming of the bank 120, a plurality of pixel areas PA is disposed on the display area AA, the first dummy area DA1, and the second dummy area DA2 of the first substrate 110. The bank 120 corresponding to the outer periphery of each of the plurality of dummy pixel areas DP and the plurality of dummy pattern areas DT is formed.

In this case, the bank 120 is selected as a hydrophobic material and is formed in the form of a partition that separates each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT.

In at least a portion of the display area AA, the first dummy area DA1, and the second dummy area DA2 in which the first electrode 141 is formed, the bank 120 may be formed at an edge of the first electrode 141. It may be formed to at least partially overlap.

In the forming of the hole injection layer on the first electrode (S130), the hole injection layer 131 may be formed by inkjet printing. In this case, the hole injection layer 131 includes a plurality of pixel areas PA, a plurality of dummy pixel areas DP, and a plurality of pixel areas PA, a first dummy area DA1, and a second dummy area DA2. It is formed corresponding to each of the plurality of dummy pattern regions DT.

That is, as shown in FIG. 11A, the plurality of pixel areas PA and the plurality of dummy pixels are moved using the head 220 while moving the nozzle 200 mounted on the first substrate 110 in one direction. The first liquid material 310 including the hole injection organic material is discharged toward the first substrate 110 in a pattern corresponding to each of the region DP and the plurality of dummy pattern regions DT. Accordingly, a first liquid material 310 corresponding to each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT is formed on the first electrode 141.

Here, as shown in FIG. 11B, the target area where the first liquid material 310 is discharged is not limited to the display area AA and the first dummy area DA1 on the first substrate 110. It extends to 2 dummy area DA2. That is, the target region for discharging the first liquid material 310 includes the display region AA and the first and second dummy regions DA1 and DA2.

Thereafter, as shown in FIG. 11C, the discharged first liquid material 310 is dried, and each of the plurality of pixel regions PA, the plurality of dummy pixel regions DP, and the plurality of dummy pattern regions DT are formed. The corresponding hole injection layer 131 is formed on the first electrode 141.

As described above, according to the exemplary embodiment of the present application, when the hole injection layer 131 is formed by using an inkjet printing method, not only the display area AA and the first dummy area DA1, but also the second dummy area ( DA2) is also discharged and dried for the first liquid material 310.

In this way, the discharge of the first liquid material 310 may be started from the second dummy area DA2 instead of the display area AA and the first dummy area DA1, so that the nozzle 200 is in an unstable initial state. And the discharge of the first liquid material 310 by the head 220 is performed to the second dummy area DA2, and thereafter, in the state where the driving of the nozzle 200 and the head 220 is stabilized, the first dummy material. The first liquid material 310 may be discharged to the area DA1 and the display area AA.

In other words, in the inkjet printing method, there is a problem in that the nozzle 200 has an unstable linear movement during initial driving, a problem that the head 220 discharges the liquid material at a discharge amount smaller or different from a predetermined amount. However, according to one embodiment of the present application, the discharge of the first liquid material 310 by the nozzle 200 and the head 220 during the initial driving is not the display area AA and the first dummy area DA1. The first liquid material is applied to the second dummy area DA2, and then the driving of the nozzle 200 and the head 220 is stabilized, and then the first liquid material is applied to the display area AA and the first dummy area DA1. Discharge 310. As a result, it is possible to prevent the uniformity of the first liquid material 310 discharged to the display area AA and the first dummy area DA1 from being lowered.

In addition, since the display area AA is surrounded by the first and second dummy areas DA1 and DA2, when the first liquid material 310 is dried, the display area AA may be at the center or the edge of the display area AA. The first liquid material 310 discharged in the display area AA may be placed in a dry atmosphere in which a solvent is saturated.

Therefore, even when the hole injection layer 131 is formed, the uniformity of the hole injection layer 131 formed in the display area AA can be prevented even if the inkjet printing method is used.

Next, in the forming of the hole transport layer on the hole injection layer (S140), the hole transport layer 132, like the hole injection layer 131, may be formed by an inkjet printing method. Also in this case, the hole transport layer 132 has a plurality of pixel areas PA, a plurality of dummy pixel areas DP, and a plurality of pixel areas PA, a first dummy area DA1 and a second dummy area DA2. It is formed corresponding to each of the plurality of dummy pattern regions DT.

That is, as illustrated in FIG. 11D, the plurality of pixel areas PA and the plurality of dummy pixels are moved by using the head 220 while moving the nozzle 200 mounted on the first substrate 110 in one direction. The second liquid material 320 including the hole transporting organic material is discharged to the first substrate 110 in a pattern corresponding to each of the region DP and the plurality of dummy pattern regions DT. Accordingly, the second liquid material 320 corresponding to each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT is formed on the hole injection layer 131.

Here, the range in which the second liquid material 320 is discharged is similar to the discharge range of the first liquid material 310 shown in FIG. 11B, and the display area AA and the first dummy on the first substrate 110 are provided. In addition to the area DA1, the second dummy area DA2 is included.

Thereafter, as shown in FIG. 11E, the discharged second liquid material 320 is dried, and each of the plurality of pixel regions PA, the plurality of dummy pixel regions DP, and the plurality of dummy pattern regions DT are formed. The corresponding hole transport layer 132 is formed on the first electrode 141.

As described above, according to the exemplary embodiment of the present application, when the hole transport layer 132 is formed using the inkjet printing method, not only the display area AA and the first dummy area DA1, but also the second dummy area DA2. ), The second liquid material 320 is discharged and dried.

Thus, after the driving of the nozzle 200 and the head 220 is stabilized, the second liquid material 320 may be discharged to the first dummy area DA1 and the display area AA, thereby displaying the display area. The uniformity of the second liquid material 320 discharged to the AA and the first dummy area DA1 can be prevented from being lowered. When the second liquid material 320 is dried, the solvent is saturated in the second liquid material 320 discharged to the display area AA regardless of which part of the display area AA is located. Can be placed in a dry atmosphere. Therefore, even when the hole transport layer 132 is formed, the uniformity of the hole transport layer 132 formed in the display area AA can be prevented from being degraded even when the inkjet printing method is used.

In the forming of the light emitting layer on the hole transport layer (S150), the light emitting layer 130, like the hole injection layer 131 and the hole transport layer 132, may be formed by an inkjet printing method. As such, when the light emitting layer 130 is formed by an inkjet printing method, the light emitting layer 130 may include a plurality of pixel areas PA in the display area AA, the first dummy area DA1, and the second dummy area DA2. ), Corresponding to each of the plurality of dummy pixel regions DP and the plurality of dummy pattern regions DT, are formed of a light emitting organic material.

In this case, the light emitting layer 130 corresponding to each of the plurality of pixel areas PA, the plurality of dummy pixel areas DP, and the plurality of dummy pattern areas DT may be formed of the first light emitting layer 130R having the red light emission and the first light emitting layer having the green light emitting property. It may be one of the second light emitting layer 130G and the third light emitting layer emitting blue light.

In particular, the light emitting layer 130 corresponding to each of the plurality of pixel areas PA and the plurality of dummy pixel areas DP may be any one of the first, second, and third light emitting layers 130R, 130G, and 130B. The light emitting layer 130 corresponding to each of the dummy pattern regions DT is at least one of the first, second, and third light emitting layers 130R, 130G, and 130B formed by an inkjet printing method.

For example, when the first, second, and third light emitting layers 130R, 130G, and 130B are all formed by an inkjet printing method, the light emitting layer 130 corresponding to each of the plurality of dummy pattern regions DT may be formed of a first, a second, and a third light emitting layer 130. Any one of the second and third light emitting layers 130R, 130G, and 130B. Alternatively, when only the first and second light emitting layers 130R and 130G are formed by inkjet printing, the light emitting layer 130 corresponding to each of the plurality of dummy pattern regions DT may include the first and second light emitting layers 130R and 130G. Which is either.

Specifically, forming the light emitting layer (S150) is as follows.

As shown in FIG. 12A, while moving the nozzle 200 mounted on the first substrate 110 in one direction, using the head 220, the plurality of pixel areas PA and the plurality of dummy pixel areas ( A first light emitting liquid phase including an organic light emitting material that emits any one of red and green (for example, red) in a pattern corresponding to each of the DP and the plurality of dummy pattern regions DT, PA1 and DT1. The material 330 is discharged to the first substrate 110 side. (S151)

Accordingly, the first corresponding to each of the pixel area PA1 of the plurality of pixel areas, the dummy pixel area of some of the plurality of dummy pixel areas DP, and the dummy pattern area DT1 of some of the dummy pattern areas, respectively. The light emitting liquid material 330 is formed on the hole transport layer 132.

As shown in FIG. 12B, the range in which the first light emitting liquid material 330 is discharged is the display area AA, the first dummy area DA1, and the second dummy area (above the first substrate 110). DA2) each comprising a portion (R).

Thereafter, as shown in FIG. 12C, the discharged first light emitting liquid material 330 is dried to form dummy pixels of some of the pixel areas PA1 and a plurality of dummy pixel areas DP of the plurality of pixel areas. A first light emitting layer 130R corresponding to each of the dummy pattern regions DT1 of the region and the plurality of dummy pattern regions is formed on the hole transport layer 132. (S152)

Next, as illustrated in FIG. 12D, the plurality of pixel areas PA and the plurality of dummy pixels are moved by using the head 220 while moving the nozzle 200 mounted on the first substrate 110 in one direction. A material including an organic light emitting material that emits one of red and green (for example, green) in a pattern corresponding to the other part PA2 and DT2 of each of the area DP and the plurality of dummy pattern areas DT. The light emitting liquid material 340 is discharged to the first substrate 110 side. (S153)

Accordingly, each of the plurality of pixel areas PA2 of the plurality of pixel areas, the dummy pixel area of another part of the plurality of dummy pixel areas DP, and the dummy pattern area DT2 of another part of the plurality of dummy pattern areas respectively correspond to each other. The second light emitting liquid material 340 is formed on the hole transport layer 132.

12E, the second light emitting liquid material 340 may be discharged in the display area AA, the first dummy area DA1, and the second dummy area (above the first substrate 110). DA2) each other part (G).

Thereafter, as shown in FIG. 12F, the discharged second light emitting liquid material 340 is dried so that the other part of the pixel area PA2 and the other part of the plurality of dummy pixel areas DP of the plurality of pixel areas are dried. A second light emitting layer 130G corresponding to each of the dummy pattern regions DT2 of the other part of the dummy pixel region and the plurality of dummy pattern regions is formed on the hole transport layer 132. (S154)

Next, as shown in FIG. 12G, blue is formed in a pattern corresponding to the pixel area PA3 of another part of the plurality of pixel areas and the dummy pixel area of another part of the plurality of dummy pixel areas DP. The light emitting organic light emitting material is stacked to form a third light emitting layer 130B on the hole transport layer 132.

In this case, although not separately illustrated, when the organic light emitting material emitting blue light may be provided as a liquid material, the third light emitting layer 130B may also be inkjet, like the first and second light emitting layers 130R and 130G described above. It may be formed by a printing method. That is, after discharging the liquid material including the organic light emitting material emitting blue light, it is dried to form the third light emitting layer 130B. In this case, the third light emitting layer 130B includes the plurality of dummy pattern regions DT, including the pixel region PA3 of another portion of the plurality of pixel regions, and the dummy pixel region of another portion of the plurality of dummy pixel regions DP. Is formed to correspond to each of the other dummy pattern regions DT3.

As described above, when the light emitting layer 130 is formed using the inkjet printing method, the light emitting liquid material is discharged and discharged not only for the display area AA and the first dummy area DA1 but also for the second dummy area DA2. By drying, the uniformity of the light emitting layer 130 formed in the display area AA can be prevented from being lowered.

Next, as shown in FIG. 13, an electron transport layer 133 corresponding to each of the plurality of pixel areas PA and the plurality of dummy pixel areas DP is formed on the light emitting layer 130 (S160). An electron injection layer 134 corresponding to each of the pixel area PA and the plurality of dummy pixel areas DP is formed on the electron transport layer 133. (S170)

As illustrated in FIG. 14, the second electrode 142 facing the first electrode 141 is formed to correspond to each of the plurality of pixel regions PA and the plurality of dummy pixel regions DP. 134 is formed on (S180). The second electrode 142 may be formed in common in all of the plurality of pixel areas PA and the plurality of dummy pixel areas DP.

Subsequently, after the sealing layer 140 corresponding to the third dummy area DA3 is formed in at least one of the first and second substrates 110 and 150, the first and second substrates are formed through the sealing layer 140. (110, 150) are opposed to each other. In operation S190, the light emitting layer 130 of each of the plurality of pixel areas PA is sealed to be blocked from external moisture and oxygen. Thus, the organic light emitting display device shown in FIG. 4 is manufactured.

As described above, according to the exemplary embodiment of the present application, in forming a part of the organic light emitting device, particularly, the light emitting layer, the display area in which the organic light emitting device is to be formed is a target area for discharging the liquid material while using the inkjet printing method. The present invention is not limited to AA and the first dummy area DA1, but extends to the second dummy area DA2, so that the discharge and drying of the liquid material can be performed under the same conditions in the display area. Thus, due to the disadvantages of the inkjet printing method such as the initial unsafe driving and the difference in the dry atmosphere, it is possible to prevent the light emitting layer of the display area AA from being formed with low uniformity. Therefore, the luminance characteristic of the organic light emitting element D corresponding to each pixel area PA can be made uniform, thereby preventing unevenness in the display area AA.

FIG. 15 illustrates luminance of some pixel areas corresponding to an edge of the display area in the organic light emitting diode display according to the exemplary embodiment. FIG.

As shown in FIG. 15, according to the exemplary embodiment of the present application, it is confirmed that each pixel area of the display area AA exhibits relatively the same luminance characteristics regardless of the position. In other words, the pixel region disposed in the edge portion adjacent to the non-display region NA in the display region AA also exhibits the same luminance characteristics as the pixel region disposed in the middle portion thereof. Accordingly, since the pixel area that is darker than other pixel areas, that is, the unevenness does not occur, image quality deterioration can be prevented.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is conventional in the art that various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

100: organic light emitting display device
AA: display area NA: non-display area
DA1, DA2, DA3: first, second and third dummy regions
PA: pixel area DP: dummy pixel area
DT: dummy pattern area
110: first substrate 120: bank
130: light emitting layer
130R: red light emitting first light emitting layer
130G: green light emitting second light emitting layer
130B: blue light emitting third light emitting layer
140: sealing layer 150: second substrate
112: wiring section
112a, 112b, 112c: multiple power wiring
131: hole injection layer 132: hole transport layer
133: electron transport layer 134: electron injection layer
141: first electrode 142: second electrode
200: nozzle 220: head
310, 320: first and second liquid material
330 and 340: first and second light emitting liquid materials

Claims (17)

A first dummy area having a display area and a non-display area outside the display area, and positioned outside the predetermined width on each side of the non-display area except for the vertex of the edge of the display area, the first dummy area and the display area A first substrate comprising a second dummy region positioned to surround a vertex of an edge of the second dummy region and a third dummy region surrounding the second dummy region;
On the first substrate, spaces are regularly spaced to separate a plurality of dummy pixel regions in the first dummy region and a plurality of dummy pattern regions in the second dummy region, and to classify a plurality of pixel regions in the display region. A bank provided with;
An organic light emitting diode disposed in each of the plurality of pixel regions, the organic light emitting diode including first and second electrodes facing each other with a light emitting layer therebetween;
Each of the plurality of dummy pixel regions, including first and second electrodes facing each other with a light emitting layer interposed therebetween, and a dummy element having the same structure as the organic light emitting element;
A second substrate facing the first substrate; And
A sealing layer provided between the first substrate and the second substrate and sealingly bonding the first and second substrates to correspond to the third dummy region without the light emitting layer and the bank;
The organic light emitting diode, the dummy device, and the dummy pattern region include the light emitting layer in a space spaced apart from the bank.
And a bank of the second dummy region overlapping a power line parallel to each side of the first substrate. The method of claim 1,
The plurality of dummy pixel areas may be arranged in the first dummy area in a vertical direction from each edge of the display area.
The second dummy area includes a plurality of dummy pattern areas arranged in a normal direction from each edge side of the display area. The method of claim 1,
For each of the plurality of dummy pattern regions, further comprising a dummy pattern including the light emitting layer,
The dummy pattern is
And an organic layer formed of a liquid material formed only between the first substrate and the light emitting layer, wherein the organic layer formed of a liquid material is not provided on the light emitting layer. The method of claim 1,
The organic light emitting device
A hole injection layer and a hole transport layer formed between the first electrode and the light emitting layer; And
Further comprising an electron transport layer and an electron injection layer formed between the light emitting layer and the second electrode,
And the first electrode is formed on the first substrate, and the edge of the first electrode and the bank overlap at least a portion of each other. The method of claim 1,
The light emitting layer of each of the plurality of pixel areas and the plurality of dummy pixel areas may be any one of first, second, and third light emitting layers emitting different red, green, and blue colors,
In the second dummy region, a part of the plurality of dummy pattern regions does not include a light emitting layer, and the rest includes the light emitting layer, and the light emitting layer is any one of the first and second light emitting layers emitting different red and green colors. One organic light emitting display device. delete delete delete delete delete delete delete delete The method of claim 1,
The bank is a hydrophobic material. The method of claim 1,
And the dummy pattern area includes a dummy pattern having fewer stacks on the light emitting layer than the organic light emitting element. The method of claim 15,
And the plurality of organic light emitting elements and the plurality of dummy elements each further include a layer related to electron transport and electron injection of an organic light emitting element on the light emitting layer, rather than the dummy pattern. The method of claim 1,
The dummy device of the first dummy area is used to test the characteristics of the organic light emitting device.

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