KR102698318B1 - Organic light emitting display device and method of manufacturing the same - Google Patents

Abstract

The present invention provides an organic light-emitting display capable of implementing high resolution using a fine mask and a manufacturing method thereof, comprising: a first pixel including a first light-emitting layer; a second pixel including a second light-emitting layer and a first color filter disposed on the second light-emitting layer; and a third pixel including a second light-emitting layer and a second color filter disposed on the second light-emitting layer, wherein the first light-emitting layer and the second light-emitting layer emit different colors.

Description

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

The present invention relates to an organic light emitting display device and a method for manufacturing the same.

As the information society develops, the demand for display devices for displaying images is increasing in various forms. Accordingly, various display devices such as liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting displays (OLEDs) are being utilized recently.

Among display devices, organic light-emitting display devices are self-luminous, and have superior viewing angles and contrast ratios compared to liquid crystal displays (LCDs), and do not require a separate backlight, allowing for lightweight and thin designs, and have the advantage of low power consumption. In addition, organic light-emitting display devices can be driven by low direct current voltage, have a fast response speed, and have the advantage of low manufacturing costs.

An organic light-emitting display device includes pixels, each including an organic light-emitting element, and a bank that partitions the pixels to define the pixels. The bank can serve as a pixel definition film. The organic light-emitting element includes an anode electrode, an organic light emitting layer, and a cathode electrode. In this case, when a high potential voltage is applied to the anode electrode and a low potential voltage is applied to the cathode electrode, holes and electrons move to the light-emitting layer respectively, and combine with each other in the light-emitting layer to emit light.

Each of the pixels may have a red pixel including a red light-emitting layer that emits red light, a green pixel including a green light-emitting layer that emits green light, and a blue pixel including a blue light-emitting layer that emits blue light. In this case, a red light-emitting layer is formed in the red pixels using a first fine metal mask (hereinafter referred to as “FMM”) in which an opening is formed in an area corresponding to the red pixels, a green light-emitting layer is formed in the green pixels using a second FMM in which an opening is formed in an area corresponding to the green pixels, and a blue light-emitting layer is formed in the blue pixels using a third FMM in which an opening is formed in an area corresponding to the blue pixels.

Meanwhile, when applying FMM to a large-area display device such as a TV, the FMM may sag due to its large size and weight. If the FMM formed by a fine pattern sags, it may be difficult to deposit adjacent red pixels, green pixels, and blue pixels at the desired locations, respectively.

The present invention has been made to solve the above-mentioned problems, and a technical task is to provide an organic light-emitting display device capable of implementing high resolution using a fine mask and a method for manufacturing the same.

In order to achieve the above-described technical problem, the present invention provides an organic light-emitting display device and a method for manufacturing the same, which comprises a first pixel including a first light-emitting layer, a second pixel including a second light-emitting layer and a first color filter disposed on the second light-emitting layer, and a third pixel including a second light-emitting layer and a second color filter disposed on the second light-emitting layer, wherein the first light-emitting layer and the second light-emitting layer emit different colors.

In an organic light-emitting display device according to an embodiment of the present invention, adjacent pixels are deposited with organic light-emitting layers of the same color, and organic light-emitting layers of different colors are deposited at a distance from each other, so that even when pixels of a large-area display device are deposited using a fine mask, red pixels, green pixels, and blue pixels can be deposited at desired locations, respectively. Therefore, an organic light-emitting display device according to an embodiment of the present invention can have improved reliability, and can implement high resolution using a fine mask.

An organic light-emitting display device according to one example of the present invention can form pixels that emit different colors by depositing only a first light-emitting layer and a second light-emitting layer, thereby reducing the number of masks (fine metal masks), and thus reducing the manufacturing cost and defect rate of the organic light-emitting display device.

The effects obtainable from the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

FIG. 1 is a perspective view showing an organic light emitting display device according to an example of the present invention.
FIG. 2 is a plan view showing the first substrate, gate driver, source driver IC, flexible film, circuit board, and timing controller of FIG. 1.
FIG. 3 is a plan view showing the pixel structure of an organic light-emitting display device according to a first example of the present invention.
FIG. 4 is a cross-sectional view taken along line I-I' of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to an example of the present invention.
FIG. 5 is a cross-sectional view taken along line II-II' of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to an example of the present invention.
FIG. 6 is a cross-sectional view taken along line I-I' of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to another example of the present invention.
FIG. 7 is an enlarged view of area B of FIG. 6, showing in detail an organic light-emitting layer of an organic light-emitting display device according to another example of the present invention.
FIG. 8 is a plan view showing the pixel structure of an organic light-emitting display device according to a second example of the present invention.
FIG. 9 is a plan view showing the pixel structure of an organic light-emitting display device according to a third example of the present invention.
Fig. 10 is a plan view showing a pixel structure of an organic light emitting display device according to a fourth example of the present invention. Fig. 11 is a flowchart showing a method of manufacturing an organic light emitting display device according to an example of the present invention.
FIGS. 12A to 12E are plan views showing a method for manufacturing an organic light-emitting display device according to an example of the present invention.

The meanings of the terms described in this specification should be understood as follows.

The singular expression should be understood to include the plural expression unless the context clearly defines otherwise, and the terms "first", "second", etc. are intended to distinguish one element from another element, and the scope of the right should not be limited by these terms. The terms "comprise" or "have" should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, elements, parts, or combinations thereof. 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" means not only each of the first item, the second item, or the third item, 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. The term "on" is meant to include not only cases where one configuration is formed directly on top of another configuration, but also cases where a third configuration is interposed between these configurations.

Hereinafter, a preferred example of an organic light-emitting display device and a manufacturing method thereof according to the present invention will be described in detail with reference to the attached drawings. When adding reference numerals to components in each drawing, the same components may have the same numerals as much as possible even if they are shown in different drawings. In addition, when describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

FIG. 1 is a perspective view showing an organic light emitting display device according to an example of the present invention. FIG. 2 is a plan view showing a first substrate, a gate driver, a source driver IC, a flexible film, a circuit board, and a timing controller of FIG. 1.

Referring to FIGS. 1 and 2, an organic light-emitting display device (100) according to an example of the present invention includes a display panel (110), a gate driver (120), a source driver integrated circuit (hereinafter referred to as “IC”) (130), a flexible film (140), a circuit board (150), and a timing control unit (160).

The above display panel (110) includes a first substrate (111) and a second substrate (112). The second substrate (112) may be a sealing substrate. The first substrate (111) and the second substrate (112) may be plastic or glass.

Gate lines, data lines, and pixels are formed on one surface of the first substrate (111) facing the second substrate (112). The pixels are provided in an area defined by the intersection structure of the gate lines and data lines.

Each of the pixels may include an organic light-emitting element having a thin film transistor, a first electrode, an organic light-emitting layer, and a second electrode. Each of the pixels supplies a predetermined current to the organic light-emitting element according to a data voltage of a data line when a gate signal is input from a gate line using the thin film transistor. Accordingly, the organic light-emitting element of each of the pixels can emit light with a predetermined brightness according to a predetermined current. A detailed description of the structure of each of the pixels will be described later with reference to FIGS. 3 to 7.

The display panel (110) can be divided into a display area (DA) where pixels are formed to display an image, as shown in Fig. 2, and a non-display area (NDA) where no image is displayed. Gate lines, data lines, and pixels can be formed in the display area (DA). Gate driving units (120) and pads can be formed in the non-display area (NDA).

The gate driver (120) supplies gate signals to the gate lines according to the gate control signal input from the timing control unit (160). The gate driver (120) may be formed in a non-display area (NDA) outside one side or both sides of the display area (DA) of the display panel (110) in a GIP (gate driver in panel) manner. Alternatively, the gate driver (120) may be manufactured as a driving chip, mounted on a flexible film, and attached to a non-display area (NDA) outside one side or both sides of the display area (DA) of the display panel (110) in a TAB (tape automated bonding) manner.

The above source drive IC (130) receives digital video data and a source control signal from a timing control unit (160). The source drive IC (130) converts digital video data into analog data voltages according to the source control signal and supplies the same to data lines. When the source drive IC (130) is manufactured as a driving chip, it can be mounted on a flexible film (140) in a COF (chip on film) or COP (chip on plastic) manner.

Pads such as data pads may be formed in the non-display area (NDA) of the display panel (110). Wires connecting the pads and the source drive IC (130), and wires connecting the pads and the wires of the circuit board (150) may be formed on the flexible film (140). The flexible film (140) is attached onto the pads using an anisotropic conducting film, and thus the pads and the wires of the flexible film (140) may be connected.

The circuit board (150) may be attached to flexible films (140). The circuit board (150) may have a plurality of circuits implemented with driving chips mounted thereon. For example, a timing control unit (160) may be mounted on the circuit board (150). The circuit board (150) may be a printed circuit board or a flexible printed circuit board.

The timing control unit (160) receives digital video data and a timing signal from an external system board through a cable of the circuit board (150). The timing control unit (160) generates a gate control signal for controlling the operation timing of the gate driver (120) and a source control signal for controlling the source drive ICs (130) based on the timing signal. The timing control unit (160) supplies the gate control signal to the gate driver (120) and the source control signal to the source drive ICs (130).

FIG. 3 is a plan view showing a pixel structure of an organic light-emitting display device according to a first example of the present invention. This is an enlarged view of area A of FIG. 2. Area A is an area including four unit pixels (PUs) in an organic light-emitting display device. More specifically, area A includes a first unit pixel (PU1), a second unit pixel (PU2), a third unit pixel (PU3), and a fourth unit pixel (PU4) in a clockwise direction.

Referring to FIG. 3, an organic light emitting display device according to a first example of the present invention includes a first pixel (P1), a second pixel (P2), and a third pixel (P3). An organic light emitting display device according to a first example of the present invention includes at least one of the first pixel (P1), the second pixel (P2), and the third pixel (P3) to form a unit pixel (PU). A unit pixel (PU) according to an example may be formed in a rectangular shape, but is not necessarily so formed.

The above first pixels (P1) are composed of a plurality of first pixels (P1), and are composed of N (N is a positive integer). The N first pixels (P1) are arranged at the edge of the unit pixel (PU). Four first pixels (P1) of the organic light emitting display device according to the first example of the present invention may be included in the unit pixel (PU), and the four first pixels (P1) may be arranged at each vertex of the unit pixel (PU) having a square shape. Accordingly, the first pixels (P1) are arranged so as to be spaced the farthest apart from each other within the unit pixel (PU).

In the organic light emitting display device according to the first example of the present invention, the first pixel (P1) may be formed in a shape such as a circle, a polygon, or the like, and may be formed in a triangular shape, for example. In the organic light emitting display device according to the first example of the present invention, when the first pixel (P1) has a triangular shape, any one of the vertices of the triangle may coincide with any one of the vertices of the unit pixel (PU). When the first pixel (P1) has a triangular shape, it may be arranged to be spaced apart from other pixels by a constant interval and at the furthest distance.

An organic light emitting display device according to a first example of the present invention includes a plurality of unit pixels (PUs). When four unit pixels (PUs) are arranged in a form of two rows and two columns, the first pixels (P1s) are arranged so as to be adjacent to the center. More specifically, the first pixels (P1s) may be arranged so as to be densely packed around a vertex where the first unit pixel (PU1), the second unit pixel (PU2), the third unit pixel (PU3), and the fourth unit pixel (PU4) all contact each other. The first pixel (P1) of the organic light emitting display device according to the first example of the present invention emits light of a first color, and may be, for example, a blue pixel emitting blue light.

The second pixels (P2) are composed of a plurality of K (K is a positive integer). The K second pixels (P2) are arranged at the center of the unit pixel (PU). The second pixels (P2) of the organic light-emitting display device according to the first example of the present invention may be included in two units of the unit pixel (PU), and the two second pixels (P2) may be arranged to face each other. Accordingly, the second pixels (P2) are arranged to be adjacent to each other in the unit pixel (PU).

In the organic light emitting display device according to the first example of the present invention, the second pixel (P2) may be formed in a shape such as a circle, a polygon, or the like, and may be formed in a triangular shape, for example. In the organic light emitting display device according to the first example of the present invention, when the second pixel (P2) has a triangular shape, one of the vertices of the triangle may face one of the vertices of another second pixel (P2). When the second pixel (P2) has a triangular shape, it may be arranged to be spaced the furthest from the first pixel (P1) by a constant interval.

The second pixel (P2) of the organic light-emitting display device according to the first example of the present invention emits light of a second color, and may be, for example, a red pixel that emits red light.

The third pixels (P3) are composed of a plurality of third pixels (P3), and are composed of J (J is a positive integer). The J third pixels (P3) are arranged at the center of the unit pixel (PU). The third pixels (P3) of the organic light-emitting display device according to the first example of the present invention may be included in two units of the unit pixel (PU), and the two third pixels (P3) may be arranged to face each other. Accordingly, the third pixels (P3) are arranged to be adjacent to each other in the unit pixel (PU).

In the organic light emitting display device according to the first example of the present invention, the third pixel (P3) may be formed in a shape such as a circle, a polygon, or the like, and may be formed in a triangular shape, for example. In the organic light emitting display device according to the first example of the present invention, when the third pixel (P3) has a triangular shape, any one of the vertices of the triangle may face any one of the vertices of another third pixel (P3). When the third pixel (P3) has a triangular shape, it may be arranged to be spaced the furthest from the first pixel (P1) by a constant interval.

The third pixel (P3) of the organic light-emitting display device according to the first example of the present invention emits light of a third color, and may be, for example, a green pixel that emits green light.

According to the first example of the present invention, the organic light-emitting display device includes N first pixels (P1), K second pixels (P2), and J third pixels (P3) to form one unit pixel (PU). At this time, the number (N) of the first pixels (P1) in the unit pixel (PU) is greater than the number (K) of the second pixels (P2) and the number (J) of the third pixels (P3). In addition, the number (K) of the second pixels (P2) in the unit pixel (PU) may be equal to the number (J) of the third pixels (P3).

In addition, in the organic light emitting display device according to the first example of the present invention, within a unit pixel (PU), a distance D4 between the first pixels (P1) is arranged to be longer than a distance D5 between the second pixels (P2) and a distance D6 between the third pixels (P3). In addition, the distance D4 between the first pixels (P1) is arranged to be longer than a distance D1 between the first pixels (P1) and the second pixels (P2), and a distance D1 between the first pixels (P1) and the third pixels (P3). In addition, the distance D4 between the first pixels (P1) is arranged to be longer than a distance D2 between the second pixels (P2) and the third pixels (P3).

In addition, in the organic light emitting display device according to the first example of the present invention, within the unit pixel PU, a distance D2 between the second pixels P2 and the third pixels P3 is arranged shorter than a distance D5 between the second pixels P2 and a distance D6 between the third pixels P3. In addition, the distance D2 between the second pixels P2 and the third pixels P3 is arranged shorter than a distance D1 between the first pixel P1 and the second pixels P2 and a distance D1 between the first pixel P1 and the third pixels P3. In addition, the distance D2 between the second pixels P2 and the third pixels P3 is arranged shorter than a distance D4 between the first pixels P1.

In addition, in the organic light emitting display device according to the first example of the present invention, when the first to fourth unit pixels (PU1, PU2, PU3, PU4) are arranged in the form of two rows and two columns, a plurality of first pixels (P1) are densely arranged centered on a vertex where all four unit pixels (PUs) meet at one place. At this time, the distance D3 between the first pixel (P1) and other adjacent first pixels (P1') arranged to be adjacent to the unit pixels (PUs) may be the same as the distance D2 between the second pixel (P2) and the third pixel (P3). Therefore, the distance D3 between the first pixel (P1) and other adjacent first pixels (P1') is arranged shorter than the distance D1 between the first pixel (P1) and the second pixels (P2), and the distance D1 between the first pixel (P1) and the third pixels (P3).

In this way, in the organic light emitting display device according to the first example of the present invention, the second pixel (P2) and the third pixel (P3) are arranged adjacently. As can be seen from the description of FIG. 4 which will be described later, in the organic light emitting display device according to the first example of the present invention, the second pixel (P2) and the third pixel (P3) are configured with organic light emitting layers of the same color. Therefore, in the organic light emitting display device according to the first example of the present invention, when depositing adjacent second pixels (P2) and third pixels (P3) using a fine mask, even if the fine mask sags, a defect in which the organic light emitting layer of the third pixel (P3) is deposited on the second pixel (P2) or the organic light emitting layer of the second pixel (P2) is deposited on the third pixel (P3) does not occur.

In addition, in the organic light emitting display device according to the first example of the present invention, a distance D1 between the first pixel (P1) and the second pixel (P2) and a distance D1 between the first pixel (P1) and the third pixel (P3) are longer than a distance D2 between the second pixel (P2) and the third pixel (P3). That is, the first pixel (P1) is arranged to be spaced apart from the other pixels. As can be seen in the description of FIG. 4 described below, in the organic light emitting display device according to the first example of the present invention, the second pixel (P2) and the third pixel (P3) are configured with organic light emitting layers that emit the same color, and the first pixel (P1) is configured with organic light emitting layers that emit a different color. That is, in the organic light emitting display device according to the first example of the present invention, organic light emitting layers that emit different colors are deposited to be spaced apart from each other. Therefore, in the organic light-emitting display device according to the first example of the present invention, when depositing the first pixel (P1) using a micro mask, even if the micro mask sags, a defect in depositing the organic light-emitting layer of the second pixel (P2) or the third pixel (P3) on the first pixel (P1) does not occur.

In this way, in the organic light-emitting display device according to the first example of the present invention, adjacent pixels are deposited with organic light-emitting layers of the same color, and organic light-emitting layers of different colors are deposited at a distance from each other, so that even when the pixels of a large-area display device are deposited using a fine mask, red pixels, green pixels, and blue pixels can be deposited at desired locations, respectively. Therefore, the organic light-emitting display device according to the first example of the present invention can have improved reliability, and can implement high resolution using a fine mask.

In addition, since the organic light-emitting display device according to the first example of the present invention has the first pixels (P1) within the unit pixel (PU) all separated by the first electrode (AND) and the bank (270), the brightness of the color emitted by the first pixel (P1) can be adjusted by controlling the number of first pixels (P1) that emit light and the amount of current delivered to the first pixel (P1).

FIG. 4 is a cross-sectional view taken along line I-I’ of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to an example of the present invention.

Referring to FIG. 4, an organic light emitting display device according to an example of the present invention includes a first substrate (111), a second substrate (112), a thin film transistor (210), a gate insulating film (220), an interlayer insulating film (230), a protective film (240), a planarizing film (250), an organic light emitting element (OLED), a bank (270), an encapsulating film (280), a black matrix (290), and a color filter (300).

The first substrate (111) is positioned to face the second substrate (112), and a buffer film (not shown) may be formed on one surface of the first substrate (111). The buffer film is formed on one surface of the first substrate (111) to protect the thin film transistors (210) and the organic light emitting diodes (OLEDs) from moisture penetrating through the first substrate (111) which is vulnerable to moisture permeation. The buffer film may be formed of a plurality of inorganic films that are alternately laminated. For example, the buffer film may be formed as a multi-film in which one or more inorganic films of a silicon oxide film (SiOx), a silicon nitride film (SiNx), and SiON are alternately laminated. The buffer film may be omitted.

The above thin film transistor (210) is formed on the first substrate (111) and the buffer film. The thin film transistor (210) according to an example includes an active layer (211), a gate electrode (212), a source electrode (213), and a drain electrode (214). The thin film transistor (210) illustrated in FIG. 4 is formed in a top gate manner in which the gate electrode (212) is positioned above the active layer (211), but it should be noted that the present invention is not limited thereto. That is, the thin film transistor (210) may be formed in a bottom gate manner in which the gate electrode (212) is positioned below the active layer (211), or in a double gate manner in which the gate electrode (212) is positioned both above and below the active layer (211).

The above active layer (211) is formed on the first substrate (111) and the buffer film. The active layer (211) may be formed of a silicon-based semiconductor material or an oxide-based semiconductor material. A light-blocking layer may be formed between the buffer film and the active layer (211) to block external light incident on the active layer (211).

The above gate insulating film (220) is formed on the active layer (211). The gate insulating film (220) may be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof.

The above gate electrode (212) is formed on a gate insulating film (220). A gate electrode (212) and a gate line may be formed on the gate insulating film (220). The gate electrode (212) and the gate line may be formed as a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

The interlayer insulating film (230) may be formed on the gate electrode (212) and the gate line. The interlayer insulating film (230) may be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof.

The source electrode (213) and the drain electrode (214) are formed on the interlayer insulating film (230). The source electrode (213), the drain electrode (214), and the data line may be formed on the interlayer insulating film (230). Each of the source electrode (213) and the drain electrode (214) may be connected to the active layer (211) through a contact hole penetrating the gate insulating film (220) and the interlayer insulating film (230). The source electrode (213), the drain electrode (214), and the data line may be formed as a single layer or multiple layers made of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

The above protective film (240) is formed on the source electrode (213) and the drain electrode (214). A protective film (240) for insulating the thin film transistor (210) may be formed on the source electrode (213), the drain electrode (214), and the data line. The protective film (240) may be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof.

The above-mentioned planarization film (250) is formed on the protective film (240). The planarization film (250) is formed on the protective film (240) to planarize the step caused by the thin film transistor (210). The planarization film (250) can be formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

The above organic light emitting device (OLED) and the bank (270) are formed on a planarizing film (250). The organic light emitting device (OLED) includes a first electrode (AND), an organic light emitting layer (260), and a second electrode (CAT). The first electrode (AND) may be an anode electrode, and the second electrode (CAT) may be a cathode electrode.

The first electrode (AND) may be formed on a planarization film (250). The first electrode (AND) is connected to a drain electrode (214) of a thin film transistor (210) through a contact hole penetrating the protective film (240) and the planarization film (250). The first electrode (AND) may be formed of a metal material having a high reflectivity, such as a laminated structure of aluminum and titanium (Ti/Al/Ti), a laminated structure of aluminum and ITO (ITO/Al/ITO), an APC alloy, and a laminated structure of an APC alloy and ITO (ITO/APC/ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

The organic light-emitting layer (260) is formed on the first electrode (AND). The organic light-emitting layer (260) may also be formed on the bank (270). The organic light-emitting layer (260) of the organic light-emitting display device according to one example of the present invention includes a first hole transport layer (261a), a first light-emitting layer (261b), a second light-emitting layer (262b), and a first electron transport layer (261c).

The above first hole transport layer (261a) can be formed commonly in all pixels (P1, P2, P3).

The first light-emitting layer (261b) is formed in the first pixel (P1). The first light-emitting layer (261b) may be arranged between the banks (270) or may be formed on the banks (270). The first light-emitting layer (261b) of the organic light-emitting display device according to an example of the present invention may be a blue light-emitting layer that emits blue light. Accordingly, the first pixel (P1) according to an example of the present invention may be a blue pixel including the blue first light-emitting layer (261b).

The second light-emitting layer (262b) is formed on the second pixel (P2) and the third pixel (P3). The second light-emitting layer (262b) may be disposed between the banks (270) or may be formed on the banks (270). In addition, the second light-emitting layer (262b) may be formed to cover the second bank (272), so that the second pixel (P2) and the third pixel (P3) are connected. The second light-emitting layer (262b) of the organic light-emitting display device according to an example of the present invention may be a yellow light-emitting layer that emits yellow light.

A first color filter (301) is arranged on the second light-emitting layer (262b) of the second pixel (P2) to convert yellow light into another color. The first color filter (301) according to an example may be a red color filter. Accordingly, the second pixel (P2) according to an example of the present invention may be a red pixel including a yellow second light-emitting layer (262b).

In addition, a second color filter (302) is arranged on the second light-emitting layer (262b) of the third pixel (P3) to convert yellow light into another color. The second color filter (302) according to an example may be a green color filter. Accordingly, the third pixel (P3) according to an example of the present invention may be a green pixel including a yellow second light-emitting layer (262b).

The above first electron transport layer (261c) can be formed commonly in all pixels (P1, P2, P3).

In this way, the organic light emitting display device according to one example of the present invention forms pixels (P1, P2, P3) that emit different colors by depositing only the first light emitting layer (261b) and the second light emitting layer (262b) that emit different colors, thereby reducing the number of fine metal masks (FMMs), and thus reducing the manufacturing cost and defect rate of the organic light emitting display device.

The second electrode (CAT) is formed on the organic light-emitting layer (260). The second electrode (CAT) is a common layer formed commonly on the pixels (P1, P2, P3). The second electrode (CAT) may be formed of a transparent metal material (TCO, Transparent Conductive Material) such as ITO or IZO that can transmit light. A capping layer may be formed on the second electrode (CAT).

The above bank (270) may be formed to cover the edge of the first electrode (AND) on the planarization film (250) to partition the pixels (P1, P2, P3). That is, the bank (270) functions as a pixel definition film that defines the pixels (P1, P2, P3). Each of the pixels (P1, P2, P3) has a first electrode (AND) corresponding to an anode electrode, an organic light-emitting layer (260), and a second electrode (CAT) corresponding to a cathode electrode sequentially laminated to represent a region where holes from the first electrode (AND) and electrons from the second electrode (CAT) combine with each other in the organic light-emitting layer (260) to emit light. In this case, the region where the bank (270) is formed does not emit light and thus may be defined as a non-emitting portion. The bank (270) may be formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. The bank (270) of the organic light-emitting display device according to one example of the present invention includes a first bank (271) and a second bank (272).

The first bank (271) is arranged between the first pixel (P1) and the second pixel (P2), and between the first pixel (P1) and the third pixel (P3). Since the area where the bank (270) is formed does not emit light, the width of the first bank (271) can be referred to as the distance D1 between the first pixel (P1) and the second pixel (P2), and the distance D1 between the first pixel (P1) and the third pixel (P3).

The second bank (272) is arranged between the second pixel (P2) and the third pixel (P3). Since the area where the bank (270) is formed does not emit light, the width of the second bank (272) can be referred to as the distance D2 between the second pixel (P2) and the third pixel (P3).

In this way, in the organic light-emitting display device according to an example of the present invention, the width (D2) of the second bank (272) is formed narrower than the width (D1) of the first bank (271). That is, the distance (D2) between the second pixels (P2) and the third pixels (P3) is arranged shorter than the distance (D1) between the first pixels (P1) and the second pixels (P2) and the distance (D1) between the first pixels (P1) and the third pixels (P3). Therefore, in the organic light-emitting display device according to an example of the present invention, the second organic light-emitting layer (272b) can be deposited on the second pixels (P2) and the third pixels (P3) at once through the fine mask (FMM) by densely arranging the second pixels (P2) and the third pixels (P3).

In an organic light-emitting display device according to one example of the present invention, adjacent pixels (P2, P3) have organic light-emitting layers of the same color deposited, and organic light-emitting layers of different colors deposited far apart from each other, so that even when pixels of a large-area display device are deposited using a fine mask (FMM), red pixels, green pixels, and blue pixels can be deposited at desired locations, respectively.

The above sealing film (280) is formed on the second electrode (CAT). The sealing film (280) serves to prevent oxygen or moisture from penetrating into the organic light-emitting layer (260) and the second electrode (CAT). To this end, the sealing film (280) may include at least one inorganic film. The inorganic film may be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, or titanium oxide.

Additionally, the sealing film (280) may further include at least one organic film. The organic film may be formed to a sufficient thickness to prevent foreign substances (particles) from penetrating the sealing film (280) and entering the organic light-emitting layer (260) and the second electrode (CAT).

The above black matrix (290) and the color filter (300) are formed on the sealing film (280). When the black matrix (290) and the color filter (300) are formed on the sealing film (280) rather than the second substrate (112), there is no need to align the first substrate (111) and the second substrate (112) when bonding them together, and since a separate adhesive layer is not required, the thickness of the display panel can be reduced.

A black matrix (290) may be placed between color filters (300) to prevent light from one pixel from traveling to the color filter of an adjacent pixel, thereby causing color mixing. In addition, the black matrix (290) may be placed to overlap with a bank (270) corresponding to a non-light-emitting portion.

The color filter (300) includes a first color filter (301) and a second color filter (302). Each of the color filters (301, 302) may be arranged to correspond to pixels (P2, P3). For example, as shown in FIG. 4, the first color filter (301) is arranged to correspond to the second pixel (P2), and the second color filter (302) is arranged to correspond to the third pixel (P3). Although the drawing shows that the color filter (300) is not arranged on the first pixel (P1), this is not necessarily the case, and a blue color filter may be arranged. The first color filter (301) of the organic light emitting display device according to an example of the present invention may be a red color filter, and the second color filter (302) may be a green color filter.

An organic light-emitting display device according to an example of the present invention can emit red light from a second pixel (P2) by arranging a first color filter (301) on a second light-emitting layer (262b) that emits yellow light, and can emit green light from a third pixel (P3) by arranging a second color filter (302).

The second substrate (112) is placed on the color filter (300). The second substrate (112) may be a plastic film, a glass substrate, or a sealing film (protective film).

FIG. 5 is a cross-sectional view taken along line II-II’ of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to an example of the present invention. The organic light-emitting display device illustrated in FIG. 5 is the same as the organic light-emitting display device according to the example described in FIGS. 1 to 4, except for the third bank (273) arranged between the illustrated pixels (P1, P1’). Accordingly, in the following description, only the illustrated pixels (P1, P1’) and the third bank (273) will be described, and redundant descriptions of the same configuration will be omitted.

Referring to FIG. 5, an organic light-emitting display device according to an example of the present invention includes a first pixel (P1) and another adjacent first pixel (P1'). At this time, the first pixel (P1) and the other adjacent first pixel (P1') are each arranged in a different unit pixel (PU), and are arranged adjacently when a plurality of unit pixels (PUs) are arranged. More specifically, the first pixel (P1) is arranged at the upper right of the fourth unit pixel (PU4), and the other adjacent first pixel (P1') is arranged at the upper left of the third unit pixel (PU3), so as to be adjacent to each other.

According to an example of the present invention, a first pixel (P1) and another adjacent first pixel (P1') of an organic light-emitting display device may be blue pixels that emit blue light. The first pixel (P1) and another adjacent first pixel (P1') include a first light-emitting layer (261b) in common. The first light-emitting layer (261b) may be arranged between banks (270), and may be formed to cover a third bank (273) so that the first pixel (P1) and another adjacent first pixel (P1') are connected.

A third bank (273) is arranged between the first pixel (P1) and the adjacent other first pixel (P1'). Since the area where the bank (270) is formed does not emit light, the width of the third bank (273) can be referred to as the distance D3 between the first pixel (P1) and the adjacent other first pixels (P1'). The width (D3) of the third bank (273) of the organic light-emitting display device according to an example of the present invention can be formed to be 8.0 um.

In this way, in the organic light-emitting display device according to an example of the present invention, the width (D3) of the third bank (273) is formed narrower than the width (D1) of the first bank (271). That is, the distance (D3) between the first pixel (P1) and the other adjacent first pixels (P1') is arranged shorter than the distance (D1) between the first pixel (P1) and the second pixels (P2), and the distance (D1) between the first pixel (P1) and the third pixels (P3). Therefore, in the organic light-emitting display device according to an example of the present invention, the first organic light-emitting layer (272a) can be deposited on the first pixel (P1) and the other adjacent first pixels (P1') at once through the fine mask (FMM) by densely arranging the first pixel (P1) and the other adjacent first pixels (P1').

In an organic light-emitting display device according to one example of the present invention, adjacent pixels (P1, P1’) have organic light-emitting layers of the same color deposited, and organic light-emitting layers of different colors deposited far apart from each other, so that even when pixels of a large-area display device are deposited using a fine mask (FMM), red pixels, green pixels, and blue pixels can be deposited at desired locations, respectively.

FIG. 6 is a cross-sectional view taken along the line I-I’ of FIG. 3, and is a cross-sectional view of an organic light-emitting display device according to another example of the present invention. The organic light-emitting display device illustrated in FIG. 6 is identical to the organic light-emitting display device according to the example described in FIGS. 1 to 5 above, except for the organic light-emitting layer (260). Accordingly, in the following description, only the organic light-emitting layer (260) will be described, and redundant descriptions of the same components will be omitted.

Referring to FIG. 6, an organic light-emitting layer (260) of an organic light-emitting display device according to another example of the present invention may be formed in a tandem structure of two or more stacks. Each of the stacks may include a hole transporting layer, at least one light emitting layer, and an electron transporting layer. The organic light-emitting layer (260) of an organic light-emitting display device according to another example of the present invention includes a first stack (261), a second stack (262), and a charge generation layer (263).

The first stack (261) is formed on the first electrode (AND). The first stack (261) is a common layer formed commonly on the pixels (P1, P2, P3). The first stack (261) may also be formed on the banks (270). The first stack (261) according to another example of the present invention may be a blue organic light-emitting layer that emits blue light.

The second stack (262) is formed on the charge generation layer (263) and the second stack (262). The second stack (262) is a common layer formed only on the second pixel (P2) and the third pixel (P3). That is, the second pixel (P2) and the third pixel (P3) of the organic light-emitting display device according to another example of the present invention may be formed in a tandem structure of two or more stacks including the first stack (261) and the second stack (262). In FIG. 6, the organic light-emitting layer (260) includes two stacks (261, 262), but is not limited thereto. That is, the organic light-emitting layer (260) may include three or more stacks. The second stack (262) may also be formed on the banks (270). The second stack (262) according to another example of the present invention may be a yellow organic light-emitting layer that emits yellow light.

The charge generation layer (263) is disposed between the stacks and may be formed between the first stack (261) and the second stack (262). The charge generation layer (263) may include an n-type charge generation layer positioned adjacent to the lower stack and a p-type charge generation layer formed on the n-type charge generation layer and positioned adjacent to the upper stack. The n-type charge generation layer injects electrons into the lower stack, and the p-type charge generation layer injects holes into the upper stack. The n-type charge generation layer may be an organic layer in which an alkali metal such as Li, Na, K, or Cs, or an alkaline earth metal such as Mg, Sr, Ba, or Ra is doped into an organic host material having electron transport capability. The p-type charge generation layer may be an organic layer in which an organic host material having hole transport capability is doped with a dopant.

FIG. 7 is an enlarged view of area B of FIG. 6, showing in detail an organic light-emitting layer of an organic light-emitting display device according to another example of the present invention.

Referring to FIG. 7, the first stack (261) includes a first hole transport layer (261a), a first light-emitting layer (261b), and a first electron transport layer (261c). The second stack (262) includes a second hole transport layer (262a), a second light-emitting layer (262b), and a second electron transport layer (262c).

The first hole transport layer (261a) plays a role of smoothly transferring holes injected from the first electrode (AND) to the first light-emitting layer (261b). The second hole transport layer (262a) plays a role of smoothly transferring holes injected from the charge generation layer (263) to the second light-emitting layer (262b).

Each of the first light-emitting layer (261b) and the second light-emitting layer (262b) includes a host and a dopant. In addition, each of the first light-emitting layer (261b) and the second light-emitting layer (262b) may include a material that emits a predetermined light, and may be formed using a phosphorescent or fluorescent material.

The second electron transport layer (262c) plays a role of smoothly transferring electrons injected from the second electrode (CAT) to the second light-emitting layer (262b). The first electron transport layer (261c) plays a role of smoothly transferring electrons injected from the charge generation layer (263) to the first light-emitting layer (261b).

FIG. 8 is a plan view showing a pixel structure of an organic light-emitting display device according to a second example of the present invention, FIG. 9 is a plan view showing a pixel structure of an organic light-emitting display device according to a third example of the present invention, and FIG. 10 is a plan view showing a pixel structure of an organic light-emitting display device according to a fourth example of the present invention.

The pixel structure of the organic light-emitting display device illustrated in FIGS. 8 to 10 is identical to the pixel structure of the organic light-emitting display device according to the first example described in FIG. 3, except for the shape of the first pixel (P1). Accordingly, in the following description, only the first pixel (P1) will be described, and redundant description of the same configuration will be omitted.

Referring to FIGS. 8 and 9, the first pixel (P1) of the organic light emitting display device according to the second and third examples of the present invention is composed of a plurality of first pixels (P1), and may be composed of N/2 (N is a positive integer). The first pixels (P1) of the organic light emitting display device according to the second and third examples of the present invention may be included in two units of a unit pixel (PU). This is the same as the form in which the first pixels (P1) of the organic light emitting display device according to the first example of the present invention are respectively connected. More specifically, the first pixel (P1) according to the second example of the present invention has a form in which the first pixels (P1) arranged at two upper vertices in the unit pixel (PU) are connected at the corners, and the first pixels (P1) arranged at two lower vertices are connected at the corners. A first pixel (P1) according to a third example of the present invention has a form in which first pixels (P1) arranged at two vertices on the left side within a unit pixel (PU) are connected, and first pixels (P1) arranged at two vertices on the right side are connected.

The organic light-emitting display device according to the second and third examples of the present invention can control the brightness of the color emitted by the first pixel (P1) by controlling the number of first pixels (P1) that emit light and the amount of current delivered to the first pixel (P1).

Referring to FIG. 10, the first pixel (P1) of the organic light emitting display device according to the fourth example of the present invention is formed as one. The first pixel (P1) of the organic light emitting display device according to the fourth example of the present invention has a form that surrounds the remaining second pixels (P2) and third pixels (P3). This is the same as a form in which all the first pixels (P1) of the organic light emitting display device according to the first example of the present invention are connected. More specifically, the first pixel (P1) of the organic light emitting display device according to the fourth example of the present invention has a form in which the first pixels (P1) respectively arranged at the vertices within the unit pixel (PU) are connected at the corners of the unit picture element (PU).

Since the organic light-emitting display device according to the fourth example of the present invention is composed of one first pixel (P1), the brightness of the color emitted by the first pixel (P1) can be adjusted by controlling the amount of current delivered to the first pixel (P1).

In this way, the organic light emitting display devices according to the second to fourth examples of the present invention have a larger area of the first pixel (P1) and a wider opening than the organic light emitting display device according to the first example. Therefore, the organic light emitting display devices according to the second to fourth examples of the present invention can have improved power consumption and luminous efficiency.

FIG. 11 is a flowchart showing a method for manufacturing an organic light-emitting display device according to an example of the present invention, and FIGS. 12a to 12e are plan views showing a method for manufacturing an organic light-emitting display device according to an example of the present invention.

The plan views illustrated in FIGS. 12a to 12e relate to a method for manufacturing an organic light-emitting display device according to an example of the present invention illustrated in FIG. 3 described above, and the same reference numerals are assigned to the same components. Hereinafter, a method for manufacturing an organic light-emitting display device will be described by combining FIGS. 11 and 12a to 12e.

First, a thin film transistor (210), a first electrode (AND), and a bank (270) are formed on a first substrate (111).

Specifically, a buffer film can be formed on the first substrate (111). The buffer film is intended to protect the thin film transistor (210) and the organic light emitting diode (OLED) from moisture penetrating through the first substrate (111) which is vulnerable to moisture permeation, and can be formed of a plurality of inorganic films that are alternately laminated. For example, the buffer film can be formed as a multi-film in which one or more inorganic films of a silicon oxide film (SiOx), a silicon nitride film (SiNx), and SiON are alternately laminated. The buffer film can be formed using a CVD (Chemical Vapor Deposition) method.

Then, an active layer (211) of a thin film transistor (210) is formed on the buffer film. Specifically, an active metal layer is formed on the entire surface of the buffer film using a sputtering method or a MOCVD method (Metal Organic Chemical Vapor Deposition). Then, the active metal layer is patterned using a mask process using a photoresist pattern to form the active layer (211). The active layer (211) can be formed of a silicon-based semiconductor material or an oxide-based semiconductor material.

Then, a gate insulating film (220) is formed on the active layer (211). The gate insulating film (220) can be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof.

Then, a gate electrode (212) of a thin film transistor (210) is formed on the gate insulating film (220). Specifically, a first metal layer is formed on the entire surface of the gate insulating film (220) using a sputtering method or a MOCVD method. Then, the first metal layer is patterned using a mask process using a photoresist pattern to form the gate electrode (212). The gate electrode (212) can be formed as a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

Then, an interlayer insulating film (230) is formed on the gate electrode (212). The interlayer insulating film (230) can be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof.

Then, contact holes are formed to expose the active layer (211) by penetrating the gate insulating film (220) and the interlayer insulating film (230).

Then, the source and drain electrodes (213, 214) of the thin film transistor (210) are formed on the interlayer insulating film (230). Specifically, a second metal layer is formed on the entire surface of the interlayer insulating film (230) using a sputtering method or a MOCVD method. Then, the second metal layer is patterned using a mask process using a photoresist pattern to form the source and drain electrodes (213, 214). Each of the source and drain electrodes (213, 214) can be connected to the active layer (211) through a contact hole penetrating the gate insulating film (220) and the interlayer insulating film (230). The source and drain electrodes (213, 214) may be formed as a single layer or multiple layers made of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or an alloy thereof.

Then, a protective film (240) is formed on the source and drain electrodes (213, 214) of the thin film transistor (210). The protective film (240) may be formed of an inorganic film, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a multi-film thereof. The protective film (240) may be formed using a CVD method.

Then, a planarization film (250) is formed on the protective film (240) to planarize the step caused by the thin film transistor (210). The planarization film (250) can be formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

Then, a first electrode (AND) of an organic light emitting device (OLED) is formed on the planarization film (250). Specifically, a third metal layer is formed on the entire surface of the planarization film (280) using a sputtering method or a MOCVD method. Then, the third metal layer is patterned using a mask process using a photoresist pattern to form the first electrode (AND). The first electrode (AND) can be connected to the drain electrode (214) of the thin film transistor (210) through a contact hole penetrating the protective film (240) and the planarization film (250). The first electrode (AND) can be formed of a metal material having a high reflectivity, such as a laminated structure of aluminum and titanium (Ti/Al/Ti), a laminated structure of aluminum and ITO (ITO/Al/ITO), an APC alloy, and a laminated structure of an APC alloy and ITO (ITO/APC/ITO).

Then, a bank (270) is formed on the planarization film (250) to cover the edge of the first electrode (AND) in order to partition the pixels (P1, P2, P3). The bank (270) may be formed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. At this time, the organic light-emitting display device according to an example of the present invention forms the bank (270) on the first substrate (111) such that the distance (D4) between the first pixels (P1), the distance (D1) between the first pixels (P1) and the second pixels (P2), and the distance (D1) between the first pixels (P1) and the third pixels (P3) are different from the distance (D2) between the second pixels (P2) and the third pixels (P3). That is, the width (D2) of the second bank (272) is formed narrower than the width (D1) of the first bank (271). In addition, the width (D3) of the third bank (273) is formed narrower than the width (D1) of the first bank (271).

Then, a first hole transport layer (261a) is formed commonly in all pixels (P1, P2, P3). (S1)

Second, as shown in Fig. 12b, a first light-emitting layer (261b) is formed in the first pixels (P1) using a first mask (FMM1).

Specifically, a first light-emitting layer (261b) is formed on the first electrode (AND) and the bank (270) by a deposition process or a solution process using a first mask (FMM1) in which an opening is formed in an area corresponding to the first pixels (P1). (S2)

Thirdly, a second light-emitting layer (262b) is formed in the second pixel (P2) and the third pixel (P3) using the second mask (FMM2) as shown in Fig. 12c.

Specifically, a second light-emitting layer (262b) is formed on the first electrode (AND) and the bank (270) by a deposition process or a solution process using a second mask (FMM2) in which openings are formed in areas corresponding to the second pixels (P2) and the third pixels (P3). (S3)

Then, a first electron transport layer (261c) is formed commonly in all pixels (P1, P2, P3).

Then, a second electrode (CAT) is formed on the organic light-emitting layer (260). The second electrode (CAT) may be a common layer formed commonly on the pixels (P1, P2, P3). The second electrode (CAT) may be formed of a transparent metal material (TCO, Transparent Conductive Material) such as ITO or IZO that can transmit light. The second electrode (CAT) may be formed by a physical vapor deposition method such as a sputtering method. A capping layer may be formed on the second electrode (CAT).

Then, a sealing film (280) is formed on the second electrode (CAT). The sealing film (280) serves to prevent oxygen or moisture from penetrating into the organic light-emitting layer (260) and the second electrode (CAT). To this end, the sealing film (280) may include at least one inorganic film. The inorganic film may be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, or titanium oxide.

Additionally, the sealing film (280) may further include at least one organic film. The organic film may be formed to a sufficient thickness to prevent foreign substances (particles) from penetrating the sealing film (280) and entering the organic light-emitting layer (260) and the second electrode (CAT).

Fourth, a first color filter (301) is formed on the second light-emitting layer (262b) as shown in Fig. 12d. (S4)

Specifically, a first color filter (301) is formed to correspond to the second pixel (P2) of the second light-emitting layer (262b). A black matrix (290) may be placed between the color filters (300) to prevent light from one pixel from traveling to the color filter of an adjacent pixel and causing color mixing. In addition, the black matrix (290) may be placed to overlap with a bank (270) corresponding to a non-light-emitting portion.

Fifthly, a second color filter (302) is formed on the second light-emitting layer (262b) as shown in Fig. 12e. (S5)

Specifically, a second color filter (302) is formed to correspond to the third pixel (P3) of the second light-emitting layer (262b).

Then, a second substrate (112) is attached on the color filter (300). The second substrate (112) may be a plastic film, a glass substrate, or a sealing film (protective film).

As described above, the organic light emitting display device according to an example of the present invention can reduce the number of masks by depositing the first light emitting layer (261b) and the second light emitting layer (262b) using only two masks (FMM1, FMM2) and forming pixels (P1, P2, P3) that emit different colors using a color filter (300), thereby reducing the manufacturing cost and defect rate of the organic light emitting display device.

Although the embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical idea of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are exemplary in all aspects and not restrictive. The protection scope of the present invention should be interpreted by the claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

100: Organic light emitting display device 110: Display panel
111: Lower substrate 112: Upper substrate
120: Gate driver 130: Source driver IC
140: Flexible film 150: Circuit board
160: Timing controller 210: Thin film transistor
211: Active layer 212: Gate electrode
213: Source electrode 214: Drain electrode
220: Gate insulating film 230: Interlayer insulating film
240: Shield 250: Flattening Shield
260: Organic light emitting device 261: First electrode
262: Organic light-emitting layer 263: Second electrode
270: Bank 280: End of the envelope
290: Black Matrix 300: Color Filter

Claims (15)

A first pixel comprising a first light-emitting layer;
A second pixel including a second light-emitting layer and a first color filter disposed on the second light-emitting layer; and
A third pixel including the second light-emitting layer and a second color filter disposed on the second light-emitting layer,
The first light-emitting layer and the second light-emitting layer emit different colors,
A unit pixel is formed by including N (N is a positive integer) of the first pixels, K (K is a positive integer) of the second pixels, and J (J is a positive integer) of the third pixels,
An organic light emitting display device wherein the spacing between the first pixels within the unit pixel is longer than the spacing between the second pixels, the spacing between the third pixels, the spacing between the first and second pixels, the spacing between the first and third pixels, or the spacing between the second and third pixels. In paragraph 1,
a first bank between the first pixel and the second pixel; and
A second bank is further arranged between the second pixel and the third pixel,
An organic light emitting display device, wherein the width of the second bank is narrower than the width of the first bank. In the second paragraph,
An organic light emitting display device in which the first bank is also arranged between the first pixel and the third pixel. In the third paragraph,
An organic light emitting display device, wherein a third bank is further arranged between the first pixel and another adjacent first pixel, and the width of the third bank is narrower than the width of the first bank. In paragraph 1,
An organic light emitting display device, wherein the first pixels are arranged at the edge of the unit pixel, and the second and third pixels are arranged at the center of the unit pixel. delete In paragraph 5,
An organic light emitting display device wherein the distance between the second and third pixels is shorter than the distance between the second pixels, the distance between the third pixels, the distance between the first and second pixels, the distance between the first and third pixels, or the distance between the first pixels. In paragraph 5,
An organic light-emitting display device in which the unit pixels are composed of a plurality of the above-mentioned unit pixels, and when the plurality of the unit pixels are arranged in two rows and two columns, the N first pixels are arranged adjacent to each other at the center of the unit pixels. In Article 8,
An organic light emitting display device, wherein the distance between the first pixel and other adjacent first pixels is the same as the distance between the second pixel and the third pixel. In paragraph 5,
An organic light emitting display device wherein the first pixel, the second pixel, and the third pixel have a triangular shape. In paragraph 1,
The second pixel and the third pixel further include the first light-emitting layer,
An organic light emitting display device in which the second light emitting layer is disposed on the first light emitting layer. In claim 1 or claim 11,
An organic light-emitting display device in which the first light-emitting layer is a blue light-emitting layer that emits blue light, and the second light-emitting layer is a yellow light-emitting layer that emits yellow light. In Article 12,
An organic light emitting display device wherein the first color filter is a red color filter and the second color filter is a green color filter. In paragraph 5,
An organic light-emitting display device in which the first pixel is additionally arranged at a corner within a unit pixel. A step of forming a bank on a substrate such that the distance between the first pixels, the distance between the first pixels and the second pixels, and the distance between the first pixels and the third pixels are different from the distance between the second and third pixels;
A step of forming a first light-emitting layer in the first pixels using a first mask in which an opening is formed in an area corresponding to the first pixels;
A step of forming a second light-emitting layer in the second and third pixels using a second mask in which an opening is formed in an area corresponding to the second pixels and the third pixels;
forming a first color filter on the second light-emitting layer in each of the second pixels; and
A step of forming a second color filter on the second light-emitting layer in each of the third pixels,
A unit pixel is formed by including N (N is a positive integer) of the first pixels, K (K is a positive integer) of the second pixels, and J (J is a positive integer) of the third pixels,
A method for manufacturing an organic light emitting display device, wherein the spacing between the first pixels within the unit pixel is longer than the spacing between the second pixels, the spacing between the third pixels, the spacing between the first and second pixels, the spacing between the first and third pixels, or the spacing between the second and third pixels.

Images