KR102405342B1 - Organic light emitting display device - Google Patents

Abstract

The present invention provides an organic light emitting diode including a first electrode and a second electrode, an organic layer positioned between the first electrode and the second electrode in a light emitting region of a pixel region, and a repair opening region positioned in a non-light emitting region of the pixel region. It relates to an organic light emitting display device including a black matrix comprising:

Description

Organic light emitting display device {ORGANIC LIGHT EMITTING DISPLAY DEVICE}

The present invention relates to an organic light emitting display device for displaying an image.

Recently, an organic light emitting display device, which has been in the spotlight as a display device, has advantages such as fast response speed, luminous efficiency, luminance, and viewing angle by using an organic light emitting diode (OLED) that emits light by itself.

In such an organic light emitting display device, pixels including organic light emitting diodes are arranged in a matrix form, and brightness of pixels selected by a scan signal is controlled according to a gray level of data.

Each pixel of the organic light emitting diode display has a pixel structure in which an organic light emitting diode and a driving circuit for driving the organic light emitting diode are disposed.

In order to manufacture a display panel in which a plurality of pixels having such a pixel structure are defined, it is necessary to go through very many processes. This becomes a bad pixel.

Such pixel defects may seriously deteriorate image quality, and in severe cases, the display panel itself should be discarded.

Therefore, there is an urgent need for a method for efficiently repairing pixel defects.

Against this background, it is an object of the present invention to provide an organic light emitting diode display having a repair structure enabling repair of pixel defects and an organic light emitting display device in which pixel defects are repaired.

Another object of the present invention is to provide an organic light emitting diode display capable of compensating for a decrease in luminance due to repair of a defective light emitting part.

In order to achieve the above object, in one aspect, the present invention provides an organic light emitting diode including a first electrode and a second electrode, an organic layer positioned between the first electrode and the second electrode in a light emitting area of a pixel area, and a pixel An organic light emitting display device including a black matrix including a repair opening area positioned in a non-emission area of the area is provided.

In another aspect, the present invention provides a display panel in which a plurality of pixels defined by disposing data lines and gate lines are arranged, a data driver supplying a data voltage to the data lines, and a scan signal supplying a scan signal to the gate lines and a gate driver comprising: an organic light emitting diode including a first electrode and a second electrode in a light emitting region of the pixel region, an organic layer positioned between the first electrode and the second electrode in each of the plurality of pixels, and located in a non-light emitting region An organic light emitting diode display including a black matrix including an opening region for repair is provided.

As described above, according to the present invention, there is an effect of providing an organic light emitting display device having a repair structure enabling repair of pixel defects and an organic light emitting display device in which pixel defects are repaired.

Also, according to the present invention, there is an effect of providing an organic light emitting display device capable of compensating for a decrease in luminance due to repair of a defective light emitting part.

1 is a diagram illustrating a schematic system of an organic light emitting diode display according to example embodiments.
2 is a cross-sectional view of an organic light emitting display device according to an exemplary embodiment.
3 is a diagram illustrating a basic pixel structure of an organic light emitting diode display 100 according to example embodiments.
4 is an exemplary diagram of an equivalent circuit diagram of a pixel of the organic light emitting diode display 100 according to example embodiments.
5 is a diagram illustrating a pixel defect type of the organic light emitting diode display 100 according to example embodiments.
6 is a diagram illustrating a repair process for a defective light emitting unit in the organic light emitting diode display according to the first embodiment.
7 is a diagram illustrating three types of pixel arrangements of the organic light emitting diode display 100 according to exemplary embodiments.
FIG. 8 is a detailed diagram of an organic light emitting display device in which the pixel area PA 1 of the first pixel P1 and the pixel area PA 2 of the second pixel P2 are adjacent to each other as shown in FIG. 7A . It is a circuit diagram.
9A is a partial cross-sectional view of a portion A of FIG. 8 .
9B is a partial cross-sectional view of a portion B of FIG. 8 .
FIG. 10 is a layout view in which the pixels of FIG. 8 are disposed on the entire display panel.
11A is a conceptual cross-sectional view of an organic light emitting display device according to a comparative example, in contrast to the organic light emitting display device according to the exemplary embodiment shown in FIG. 2 .
11B is a plan view of an organic light emitting display device according to a comparative example, in contrast to the organic light emitting display device according to the exemplary embodiment shown in FIG. 8 .
12 is a plan view of an organic light emitting display device according to another exemplary embodiment.
13 and 14 are plan views of an organic light emitting display device 500 according to another exemplary embodiment.
FIG. 14 illustrates a portion of a display panel including pixels of the redundancy structure of FIG. 7 .
15 and 16 show the configuration of the pixels of FIG. 14 in the organic light emitting diode display shown in FIGS. 1 and 2 .
16A and 16B are plan views of an organic light emitting diode display according to a third exemplary embodiment.
17A to 17C show cutting when the first pixel region A is the red sub-pixel region, the second pixel region B is the green sub-pixel region, and the third pixel region C is the blue sub-pixel region. At each of the points there is an illustration of the specific wavelengths that each color filter layer element transmits.
18 is a plan view of one pixel included in an organic light emitting diode display according to another exemplary embodiment in a state in which a black matrix and a color filter are not shown.
19 is a partial cross-sectional view of a portion C of FIG. 18 .
20 and 22 are partial cross-sectional views of a portion D of FIG. 18 .
22 is a schematic cross-sectional view of an organic light emitting diode display after a repair process according to another exemplary embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected”, “coupled” or “connected” through another component.

1 is a diagram illustrating a schematic system of an organic light emitting diode display 100 according to example embodiments.

Referring to FIG. 1 , in the organic light emitting diode display 100 according to the embodiments, a plurality of data lines DL1 to DLm disposed in one direction and a plurality of data lines DL1 to DLm are disposed in another direction crossing the plurality of data lines DL1 to DLm. A display panel 110 including a plurality of pixels (P: Pixels) disposed in each crossing region of the plurality of gate lines GL1 to GLn, and a data voltage supplied through a plurality of data lines DL1 to DLm The data driver 120, the gate driver 130 supplying scan signals through the plurality of gate lines GL1 to GLn, and a timing controller for controlling driving timings of the data driver 120 and the gate driver 130 ( 140) and the like.

An organic light-emitting diode (OLED) and a driving circuit (DRC) for driving the plurality of pixels P disposed on the above-described display panel 110 are disposed respectively.

The above-described data driver 120 may include a plurality of data driving integrated circuits (also referred to as source driving integrated circuits). The plurality of data driving integrated circuits may include a tape automated bonding (TAB) method or The chip-on-glass (COG) method may be connected to a bonding pad of the display panel 110 , or may be implemented as a GIP (Gate In Panel) type and disposed directly on the display panel 110 , or may be disposed on the display panel 110 . ) may be integrated and arranged.

The aforementioned gate driver 130 may be positioned on only one side of the display panel 110 as shown in FIG. 1 or may be divided into two and positioned on both sides of the display panel 110 according to a driving method.

Also, the gate driving unit 130 may include a plurality of gate driving integrated circuits. The plurality of gate driving integrated circuits may include a tape automated bonding (TAB) method or a chip-on-glass (COG) method. to be connected to a bonding pad of the display panel 110 , or may be implemented as a GIP (Gate In Panel) type and disposed directly on the display panel 110 , or may be integrated and disposed on the display panel 110 . have.

The above-described timing controller 140 controls driving timings of the data driver 120 and the gate driver 130 and outputs various control signals for this purpose.

2 is a cross-sectional view of an organic light emitting display device according to an exemplary embodiment.

Referring to FIG. 2 , the organic light emitting display device 100 according to an exemplary embodiment may be an upper light emitting display device 100 that emits light emitted from the organic light emitting diode 220 in the opposite direction of the substrate 210 . . The organic light emitting diode display 100 according to an exemplary embodiment includes a plurality of pixel areas A, B, and C that emit light. Each of the pixel areas A, B, and C includes a light emitting area (PA) and a non-emission area (EA).

The organic light-emitting display device 100 according to an embodiment includes an organic light-emitting diode (OLED) 220 that emits light in each pixel area on a substrate 210 and a black matrix positioned in a non-emission area. (BM, Black Matrix, 230).

The organic light emitting diode 220 may include a first electrode 222 and a second electrode 226 in the emission region, and an organic layer 224 positioned between the first electrode 222 and the second electrode 226 . . The organic light emitting diode 220 may emit light of the same color, for example, white (W). For example, the organic layer 224 of the organic light emitting diode 220 may include a first organic light emitting layer and a second organic light emitting layer. The first organic light emitting layer may emit blue (B), and the second organic light emitting layer may emit any one color of green (G) or yellow green. As another example, the organic layer 224 of the organic light emitting diode 220 may include first to third organic light emitting layers. The first organic light emitting layer emits blue (B), the second organic light emitting layer emits any one of green (G) or yellow green (Yellow Green), and the third organic light emitting layer emits both red (R) and blue (B). can emit light. Accordingly, the organic light emitting diode 220 of each of the pixels may have the same pixel structure.

The black matrix 230 is opened in the emission area EA. Each of the pixels may include a color filter 250 in the emission area of the pixel area. In each of the pixels, the color filter 250 may be disposed in the opening region of the black matrix 230 in the emission region. In other words, in each of the pixels, the black matrix 230 may be located in a non-emission area around the color filter 250 . As another example, some of the pixels may include the color filter 250 in the emission area of the pixel area, and some other pixels expressing white light for white balance may not include the color filter 250 .

Also, the black matrix 230 may be partially opened in the non-emission area NA. The black matrix 230 includes a repair opening area 232 positioned in the non-emission area NA.

The color filter 250 includes a plurality of color filter layer elements 250a, 250b, and 250c respectively formed in the pixel area. For example, the color filter layer 250 may include a first color filter layer element 250a formed in the first pixel area A, a second color filter layer element 250b formed in the second pixel area B, and a third pixel area. and a third color filter layer element 250c formed in (C). When the first pixel region A is the red sub-pixel region, the second pixel region B is the green sub-pixel region, and the third pixel region C is the blue sub-pixel region, the first color filter layer element 250a ) may be a red color filter element, the second color filter layer element 250b may be a green color filter element, and the third color filter layer element 250c may be a blue color filter element.

The white light W emitted by the organic layer 224 passes through the first color filter layer element 250a formed in the first pixel area A, and is converted into red light, and the second pixel area B is formed in the second pixel area B. The green light passes through the second color filter layer element 250b and is converted into blue light through the third color filter layer element 250c formed in the third pixel region C.

The organic light emitting diode display 100 may include an encapsulation layer 240 sealing the organic light emitting diode 220 . The encapsulation layer 240 may protect the organic light emitting diode 220 from external moisture, air, impact, and the like. The encapsulation layer 240 may be configured in various ways according to the arrangement of internal elements of the organic light emitting diode display 100 such as the organic light emitting diode 220 . For example, the encapsulation layer 240 may encapsulate the organic light emitting diode 220 using thin film encapsulation (TFE), a face seal, or the like.

The organic light emitting display device 100 includes an encapsulation layer 240 for encapsulating the organic light emitting diode 220 positioned on the substrate 210 and an adhesive layer 260 for adhering the black matrix 230 and the color filter 250 to each other. may additionally include. The adhesive layer 260 may be Optical Clear Adhesive (OCA), Optical Clear Resin (OCR), Super View Resin (SVR), Optical Elastic Resin (OER), Direct Bonding Resin (DBR), or the like. Ultraviolet (UV) or heat may be applied to at least one of a material such as OCA, OCR, SVR, OER, DBR, etc. in a vacuum or atmosphere.

The organic light emitting display device 100 may include a cover substrate or film 212 used to manufacture the black matrix 230 and the color filter 250 . In the manufacturing process, the black matrix 230 and the color filter 250 formed on the cover substrate or film 212 may be adhered to the organic light emitting diode 220 or the encapsulation layer formed on the substrate 210 using the adhesive layer 260. have.

3 is a diagram illustrating a basic pixel structure of an organic light emitting diode display 100 according to example embodiments.

Referring to FIG. 3 , a pixel area (PA) of each of the plurality of pixels P defined in the display panel 110 of the organic light emitting diode display 100 according to the embodiments is an organic light emitting diode (OLED). , 220 , an emission area (EA) in which light is emitted, and a non-emission area (NA) in which a driving circuit DRC for driving the organic light emitting diode 220 is disposed. .

In the light emitting area EA, a light emitting part including an organic light emitting diode OLED is disposed. In the non-emission area NA, a circuit unit including a driving circuit DRC for driving the organic light emitting diode OLED and various wirings is disposed.

As described above, two pixel structures of a pixel having a 3T (Transistor) 1C (Capacitor) structure including three transistors DT, T1 and T2 and one capacitor Cstg are illustrated in FIG. 4 .

As described above, the black matrix 230 includes the opening area 232 positioned in the non-emission area NA. As shown in FIG. 3 , at least one repair wiring 232 in the driving circuit DRC is disposed in the repair opening area 232 . One repair wiring 232 disposed in the repair opening area 232 of the black matrix 230 may be disconnected as a result of the repair process depending on a pixel defect, as shown in FIGS. 5 and 6 , respectively. It may not be disconnected under normal conditions.

4 is an exemplary diagram of an equivalent circuit diagram of a pixel of the organic light emitting diode display 100 according to example embodiments.

Referring to FIG. 4 , the driving circuit DRC disposed in each non-light emitting area NA includes, for example, a driving transistor (DT) for supplying current to the organic light emitting diode (OLED), and a driving transistor. A first transistor T1 connected between the first node N1 of DT and a reference voltage line RVL for supplying a reference voltage Vref, and a driving transistor DT A second transistor T2 connected between the second node N2 and the data line DL of It may include a storage capacitor (Cstg) and the like that serves to maintain the voltage during the period.

The first transistor T1 is controlled by a first scan signal (hereinafter, referred to as “sensing signal SENSE”) supplied through the first gate line GL1 to be controlled by the first node N1 of the driving transistor DT. . In this sense, the first transistor T1 is also referred to as a sensing transistor.

The second transistor T2 is controlled by a second scan signal (hereinafter, referred to as a “scan signal SCAN”) supplied through the second gate line GL2 to drive the data voltage Vdata to the driving transistor DT ) serves to apply to the second node N2. Turn-on or turn-off of the driving transistor DT is determined by the data voltage applied to the second node N2 of the driving transistor DT to control supply of current to the organic light emitting diode (OLED). In this sense, the second transistor T2 is also referred to as a switching transistor.

In other words, in the pixel structure of FIG. 3 , two gate lines GL1 and GL2 are required, and the first transistor T1 and the second transistor T2 are different from each other through different gate lines GL1 and GL2. It is controlled by the gate signal (sensing signal SENSE, scan signal SCAN). In this sense, the pixel structure of FIG. 3 is referred to as a "2-scan-based pixel structure".

As such, when each pixel has a two-scan-based pixel structure, the gate driver 130 shown in FIG. 1 includes a gate driver outputting the scan signal SCAN and a gate driver outputting the sensing signal SENSE. It can be implemented separately, and the n gate lines GL1 to GLn are the gate lines GL1 to GLn for supplying the scan signal SCAN and the gate lines GL1' to GLn for supplying the sensing signal SENSE. ') can be divided and arranged.

The first transistor T1 and the second transistor T2 may be commonly controlled by one scan signal SCAN supplied through one gate line GL. In this pixel structure, only one gate line GL is required, and the first transistor T1 and the second transistor T2 are controlled by the same gate signal (scan signal) through one common gate line GL. do. In this sense, this pixel structure is called "one-scan-based pixel structure".

The driving transistor DT mentioned in the embodiments may be an N-type transistor or a P-type transistor. Also, although the first transistor T1 and the second transistor T2 are exemplified as N-type transistors, they may also be implemented as P-type transistors.

5 is a diagram illustrating a pixel defect type of the organic light emitting diode display 100 according to example embodiments. 6 is a diagram illustrating a repair process for a defective light emitting unit in the organic light emitting diode display according to the first embodiment.

Referring to FIG. 5 , as described above, a defect may occur in the emission area EA in each pixel area PA. The defect in the light emitting area EA occurs when an electrode (eg, the first electrode 222 or the second electrode 226 ) of the display panel 110 is shorted by a foreign material in the process, or the display panel A defect may occur in any one or more of the first electrode 222 or the second electrode 226 of 110 . In addition to this, defects in the light emitting area EA may occur for any reason that is not mentioned.

When such a defect occurs in the light emitting area EA, current excessively flows, does not flow, or flows weakly in the organic light emitting diode OLED of the display panel 110, and the pixel becomes bright, dark, or weakly darkened. and becomes a bad pixel.

The repair described in this specification may be performed during a panel manufacturing process prior to product shipment, or may be performed according to a customer's after-sales service request after product shipment.

As shown in FIG. 6 , when a light emitting part defect occurs in the organic light emitting diode (OLED) of one pixel P, repair for the light emitting part defect is the first step of the organic light emitting diode (OLED) in which the light emitting part defect occurs. In one electrode (eg, anode or cathode), a "cutting process" of cutting a portion in which the light emitting part is defective due to a foreign material in the process may be included.

According to the repair of the light emitting part defect, the light emitting area EA in the pixel area PA of the corresponding pixel P may decrease, which may decrease the luminance of the corresponding pixel. However, the decrease in luminance may be compensated for by internal or external compensation as described below with reference to FIG. 22 .

The position where the cutting process can be performed is a position where at least one wire electrically connecting between the organic light emitting diode (OLED) and the driving circuit (DRC) of the corresponding pixel can be cut when the repair process for the light emitting part defect is related. or area. Hereinafter, a position where the cutting process can be performed is referred to as a cutting point (CP). The repair wiring 232 positioned at the cutting point CP may be cut and disconnected according to a pixel defect, or may not be disconnected if the pixel is normal.

The position or number of the cutting points CP may vary according to the structure and arrangement of pixels. The cutting point CP may be any point that prevents the driving circuit of a pixel having a pixel defect from supplying current to the organic light emitting diode, as well as the aforementioned points.

Hereinafter, an embodiment of a repair structure enabling repair of a light emitting part defect and a repair process for a light emitting part defect using the same will be described.

However, below, for convenience of explanation, the organic light emitting diode display 100 having a repair structure designed to perform a repair process on any one pixel P among a plurality of pixels disposed on the display panel 110 . ), a repair process using the repair structure, and the organic light emitting diode display 100 having a structure changed through the repair process will be described.

In addition, any one pixel P among the plurality of pixels disposed on the display panel 110 may be a pixel representing the plurality of pixels disposed on the display panel 110 .

That is, if any one pixel P is a normal pixel, all pixels disposed on the display panel 110 may be regarded as normal pixels, and if a pixel defect occurs in any one pixel P, It may be considered that a pixel defect occurs in at least one pixel among all pixels disposed on the display panel 110 . In addition, if repair is performed in any one pixel P in which the pixel defect occurs, it may be considered that the repair for the pixel defect is performed in at least one pixel among all the pixels disposed on the display panel 110 .

First, an arrangement relationship between two pixels P1 and P2 involved in repairing pixel defects will be described with reference to FIG. 7 .

7 is a diagram illustrating three types of pixel arrangement of the organic light emitting diode display 100 according to exemplary embodiments.

As shown in (a), (b) and (c) of FIG. 7 , the pixel area PA 1 of the first pixel P1 and the pixel area PA 2 of the second pixel P2 are adjacent to each other. However, as shown in (a) of FIG. 7 , the organic light emitting diode OLED 1 of the first pixel P1 and the organic light emitting diode OLED 2 of the second pixel P2 are disposed adjacent to each other, or ( As shown in b), the driving circuit DRC 1 of the first pixel P1 and the organic light emitting diode OLED 2 of the second pixel P2 are disposed adjacent to each other, or as shown in FIG. 7(c), the first The driving circuit DRC 1 of the pixel P1 and the driving circuit DRC 2 of the second pixel P2 may be disposed adjacent to each other.

FIG. 8 is a detailed diagram of an organic light emitting display device in which the pixel area PA 1 of the first pixel P1 and the pixel area PA 2 of the second pixel P2 are adjacent to each other as shown in FIG. 7A . It is a circuit diagram.

Referring to FIG. 8 , the pixel area PA 1 of the first pixel P1 and the pixel area PA 2 of the second pixel P2 are adjacent to each other, but as shown in FIG. 7A , the first pixel The organic light emitting diode OLED 1 of (P1) and the organic light emitting diode OLED 2 of the second pixel P2 may be disposed adjacent to each other.

In the non-emission area NA of the first pixel P1 and the second pixel P2 , the high potential power voltage line VDDL and the data line DL are connected in a first direction (vertical direction in FIG. 8 ), for example, It may be disposed at both ends in the vertical direction, and the first gate line GL1 and the second gate line GL2 may be disposed at both ends in the second direction, for example, in a horizontal direction.

Two first and second plates PL1 and PL2 constituting the storage capacitor Cstg are disposed in the emission area EA of the first pixel P1 and the second pixel P2, and the first An electrode 220 is disposed. The second gate line GL2 is positioned between the data line DL and the first plate PL1 and a semiconductor layer (or an activation layer) is disposed on the second gate line GL2 to configure the switching transistor T2 . . The first gate line GL1 is positioned between the second plate PL2 and the connection pattern from the reference voltage line RVL and a semiconductor layer is disposed on the first gate line GL1 to configure the sensing transistor T1 . . A gate region integrally formed with the first plate PL2 is positioned between the high potential power voltage line VDDL and the second plate PL2 , and a semiconductor layer is disposed on the gate region to configure the driving transistor DT. Although not shown in FIG. 8 , the organic layer 224 and the second electrode 226 are sequentially disposed on the first electrode 222 , so that the first electrode 222 and the second electrode 226 and the organic layer 224 therebetween. constitutes the organic light emitting diode (OLED, 220).

A bank 280 having an open light emitting region is disposed on the first electrode 222 . The bank 280 has a matrix-like lattice structure on the entire substrate 210 , surrounds the edge of the first electrode 222 , and exposes a portion of the first electrode 222 . An organic layer 224 may be stacked on the open light emitting region, and a second electrode 226 may be positioned as a common electrode on the organic layer 224 .

As described above, the color filter 250 is positioned in the light emitting area EA, and the black matrix 230 is positioned in the non-emission area NA. In this case, the black matrix 230 positioned in the non-emission area NA includes the repair opening area 232 , and the repair opening area 232 is disposed at substantially the same position as the cutting point CP. However, since the repair opening area 232 is wider than the cutting point CP in terms of area, it may be convenient to perform a laser cutting procedure. Conversely, the repair opening area 232 may be narrower than the cutting point CP in terms of area.

For example, referring to FIGS. 4 and 8 , the cutting point CP is a first connection pattern 272 electrically connecting the driving transistor DL and the first electrode 222 of the organic light emitting diode (OLED). ) or located in the second connection pattern 274 positioned between the reference voltage line RVL for applying a reference voltage to the source/drain of the driving transistor DT and the driving transistor DT. In other words, the first connection pattern 272 and the second connection pattern 274 may be the repair wiring 234 described with reference to FIGS. 3, 5, and 6 .

9A is a partial cross-sectional view of a portion A of FIG. 8 . 9B is a partial cross-sectional view of a portion B of FIG. 8 .

In a stacked structure, as shown in FIG. 9A , the first connection pattern 272 may be positioned on at least one, for example, two insulating layers 290 and 292 . A bank 280 may be positioned on the first connection pattern 272 .

In a stacked structure, as shown in FIG. 9B , at least one, for example, one protective layer 294 and at least one, for example, two insulating layers 290 and 292 on the second connection pattern 274 . This can be arranged. A bank 280 may be positioned on the insulating layers 290 and 292 .

FIG. 10 is a layout view in which the pixels of FIG. 8 are disposed on the entire display panel.

As shown in FIG. 10 , if all pixels are normal pixels, all pixels disposed on the display panel 110 may be regarded as normal pixels. If a pixel defect occurs in at least one of the pixels, the display panel 110 ), it may be considered that a pixel defect has occurred in at least one pixel among all the pixels arranged in . In addition, if at least one of the pixels in which the pixel defect has occurred has been repaired, it may be regarded that at least one pixel among all the pixels disposed on the display panel 110 has been repaired for the pixel defect.

Also, according to the repair, the area of the light emitting part EP of the corresponding pixel P is reduced, which reduces the luminance of the corresponding pixel P. However, this decrease in luminance is compensated for by internal or external compensation through a method of changing the data voltage supplied to the corresponding pixel, etc. to compensate for the decrease in luminance. The luminance compensation will be described below with reference to FIG. 22 .

11A is a conceptual cross-sectional view of an organic light emitting display device according to a comparative example, in contrast to the organic light emitting display device according to the exemplary embodiment shown in FIG. 2 . 11B is a plan view of an organic light emitting display device according to a comparative example, in contrast to the organic light emitting display device according to the exemplary embodiment shown in FIG. 8 .

11A and 11B , in comparison with the organic light emitting display device 100 according to the exemplary embodiment shown in FIGS. 2 and 8 , the organic light emitting display device 300 according to the comparative example is located in the non-emission area. There is no repair opening area corresponding to the cutting point in the black matrix 330 . As such, in the organic light emitting diode display 300 according to the comparative example, since the repair opening area corresponding to the cutting point does not exist in the black matrix 330 , as shown in FIG. 8 , even if the cutting point is disposed in the driving circuit, black Since the cutting point is cut by irradiating a laser or the like in the direction of the black matrix 330 because it is covered by the matrix 330, it cannot be repaired.

On the other hand, in the organic light emitting display device 100 according to the exemplary embodiment shown in FIGS. 2 and 8 , since the repair opening area 232 corresponding to the cutting point is present in the black matrix 230 , it is shown in FIG. 8 . As described above, even when the cutting point CP is disposed in the driving circuit DRC, the pixel defect can be repaired because the cutting point is cut by irradiating a laser or the like in the direction of the black matrix 330 .

12 is a plan view of an organic light emitting display device according to another exemplary embodiment. 13 and 14 are plan views of an organic light emitting display device 500 according to another exemplary embodiment.

As shown in FIG. 12 , in the organic light emitting display device 400 according to another exemplary embodiment, the black matrix 430 includes the repair area RA and the entire repair area of the non-emission area is opened. A part of the driving circuit including the cutting point is disposed in the repair area RA. In addition, there is no color filter positioned in the light emitting area in the repair area RA.

Accordingly, when a pixel defect occurs and the cutting point is repaired by irradiating a laser or the like to cut the cutting point, the cutting point is cut by irradiating the laser or the like from the direction of the black matrix 430 to repair.

In the two pixels P1 and P2 of FIG. 12 , color filter elements of the same color are disposed, so that even if the black matrix 430 does not exist in the non-emission region between them, the light leakage phenomenon does not occur or the effect thereof is small. can

Meanwhile, in the organic light emitting diode display 400 according to another exemplary embodiment, the black matrix 430 is still disposed in the non-emission area NA between two adjacent pixels P1 and P2 . However, as shown in FIG. 13 , the black matrix 530 is still not disposed in the non-emission area NA between two adjacent pixels P1 and P2 in the organic light emitting diode display 500 according to another embodiment. it may not be As a result, the black matrix 530 may be arranged in a stripe type in the non-emission areas NA on both sides of the pixel area in the first direction. Accordingly, the repair opening area 532 of the black matrix 530 may be disposed in a stripe type including the cutting point CP in the first direction.

In this case, the color filter 250 may be located only in the emission area. Meanwhile, in the organic light emitting diode display 600 shown in FIG. 14 , it may also be located in the repair opening area 632 of the black matrix 630 . As a result, the black matrix 630 may be disposed in a stripe type in the non-emission areas NA on both sides of the pixel area PA in the first direction, and the color filter 650 may be disposed therebetween.

15 and 16 show the configuration of the pixels of FIG. 14 in the organic light emitting diode display shown in FIGS. 1 and 2 .

As shown in FIG. 1 , the organic light emitting diode display 100 includes a display panel 110 in which a plurality of pixels defined by disposing data lines DL1 to DLm and gate lines GL1 to GLn, and data It includes a data driver 120 that supplies a data voltage to the lines DL1 to DLm and a gate driver 130 that supplies a scan signal to the gate lines GL1 to GLn.

As shown in FIG. 2 , in each of the plurality of pixels, a space between the first electrode 222 and the second electrode 226 and the first electrode 222 and the second electrode 226 in the emission area EA of the pixel area is provided. It includes an organic light-emitting diode (OLED) 220 that emits light, including an organic layer 224 positioned therein, and a black matrix 230 positioned in the non-emission area NA and including an opening area 232 for repair. .

For example, as shown in FIG. 15 , three pixels P1 , P2 , and P3 may express one color. In other words, the three pixels P1, P2, and P3 may each constitute sub-pixels, and the lights emitted by the three pixels P1, P2, and P3 may be unit pixels expressing one color. Each of the three pixels P1, P2, and P3 further includes a color filter 650 positioned in the light emitting area EA, and the black matrix 630 is a non-emission area NA of the pixel area PA. It is located in the vicinity of the color filter (650).

In this case, the color filter 250 may be located only in the emission area EA other than the non-emission area NA of the pixel area PA. Conversely, in the organic light emitting diode display 600 shown in FIG. 15 , the color filter 650 may be located in the non-emission area NA in which the black matrix 630 is not disposed. As a result, the black matrix 630 may be disposed in a stripe type in the non-emission areas NA on both sides of the pixel area PA in the first direction, and the color filter 650 may be disposed therebetween.

For another example, as shown in FIG. 16 , four pixels P1 , P2 , P3 , and P4 may express one color. That is, the four pixels P1, P2, P3, and P4 may constitute a unit pixel expressing one color. Each of the three pixels P1, P2, and P3 further includes a color filter 650 positioned in the light emitting area EA, and the black matrix 630 is a non-emission area NA of the pixel area PA. It may be located in the vicinity of the color filter (650).

The other pixel P4 does not include a color filter, and the black matrix 620 may be positioned in the non-emission area NA in the same manner as the other pixels P1 , P2 , and P3 .

15 and 16 , the black matrix 630 may be disposed in a stripe type in the non-emission areas on both sides of the pixel area in the first direction, and the color filter 650 may be disposed therebetween. The three pixels P1 , P2 , and P3 may include a plurality of color filter layer elements 650a , 650b , and 650c respectively formed in the pixel area.

As described above, when the first pixel region A is the red sub-pixel region, the second pixel region B is the green sub-pixel region, and the third pixel region C is the blue sub-pixel region, the first The color filter layer element 650a may be a red color filter element, the second color filter layer element 650b may be a green color filter element, and the third color filter layer element 650c may be a blue color filter element.

When a pixel defect occurs and a laser is irradiated to the cutting point CP to cut and repair, the cutting point CP is cut by irradiating a laser or the like in the direction of the black matrix 630, so that it can be repaired. In this case, as described above, the first color filter layer element 650a, the second color filter layer element 650b, and the third color filter layer element 650c are positioned in the area where the cutting point CP is disposed in each pixel area PA. Therefore, it is possible to irradiate a laser of a specific wavelength or the like. For example, as shown in FIGS. 17A to 17C , the first pixel region A is a red sub-pixel region, the second pixel region B is a green sub-pixel region, and the third pixel region C is blue. In the case of the sub-pixel region, lasers having specific wavelengths transmitted by each color filter layer element, for example, about 1050 nm, 530 nm, and 355 nm, may be used at the cutting points.

18 is a plan view of one pixel included in an organic light emitting diode display according to another exemplary embodiment in a state in which a black matrix and a color filter are not shown.

Referring to FIG. 18 , in the organic light emitting display device 700 according to another exemplary embodiment, although the black matrix and the color filter are not shown in FIG. 16 , the arrangement and the arrangement as shown in FIGS. 3 , 8 , and 12 to 16 , It includes the black matrix and color filter of the composition.

The pixel area PA 1 of the first pixel P1 and the pixel area PA 2 of the second pixel P2 are adjacent to each other, but the organic light emitting diode OLED 1 and the second pixel of the first pixel P1 are adjacent to each other. The organic light emitting diodes OLED 2 of (P2) may be disposed adjacent to each other. In this case, the pixel structures of the first pixel P1 and the second pixel P2 may be the same as shown in FIG. 8 .

However, a bank 780 having an open light emitting region is disposed on the first electrode, and the bank 780 may be a black bank. The bank 780 may be made of a material that absorbs light, or a light absorber may be applied to absorb external light introduced from the outside.

The black bank 780 may be made of a black-based material. For example, carbon black alone or a black pigment mixed with carbon black and two or more color pigments, or black dye alone is used. Alternatively, it may include one of black dye, black resin, graphite powder, gravure ink, black spray, and black enamel prepared in black by mixing dyes of two or more different colors.

The black bank 780 has the effect of absorbing light introduced from the outside, preventing deterioration of visibility and contrast ratio, and improving luminance.

19 is a partial cross-sectional view of a portion C of FIG. 18 . 20 and 22 are partial cross-sectional views of a portion D of FIG. 18 .

In a stacked structure, as shown in FIG. 19 , the first connection pattern 772 may be positioned on at least one, for example, two insulating layers 790 and 792 . A black bank 780 may be positioned on the first connection pattern 772 . The first connection pattern 772 may include an opening region 782 for the black bank positioned to correspond to the cutting point CP. A black matrix and a color filter of the arrangement and configuration as shown in FIGS. 3, 8, and 12 to 16 are included at a position corresponding to the cutting point CP, and at the same time, the blank bank 780 also includes the cutting point CP ), there may be an opening region 782 for the black bank positioned corresponding to the .

Since there is an opening region 782 for the black bank, the black bank 780 can not only absorb the light introduced from the outside, but also process the repair described above.

In a laminated structure, as shown in FIG. 20 , at least one, for example, one protective layer 794 and at least one, for example, two insulating layers 790 and 792 on the second connection pattern 774 . This can be arranged. A black bank 780 including an opening region 782 for a black bank positioned corresponding to the cutting point CP may be positioned on the insulating layers 790 and 792 , as in FIG. 19 .

At this time, as shown in FIG. 21 , the two insulating layers 790 and 792 are also opened at the same position as the blank bank opening region 782 positioned corresponding to the cutting point CP, and the same opening regions 790a and 792a. may include Although not shown in FIG. 21 , the passivation layer 784 positioned on the second connection pattern 774 may also include an opening region.

In other words, other layers, for example, insulating layers 790 , located on each of the first connection pattern 772 and the second connection pattern 774 at the same position as the repair opening area 732 of the black matrix 730 . , 792 , the passivation layer 784 , and some or all of the blank bank 780 may include an opening region. For example, the black matrix 730 is formed in some or all of the other layers positioned between the opening region 782 of the blank bank 780 and at least one of the first connection pattern 772 and the second connection pattern 774 . An opening region may be included at the same position as the repair opening region 732 .

22 is a schematic cross-sectional view of an organic light emitting diode display after a repair process according to another exemplary embodiment.

Referring to FIG. 22 , the organic light emitting diode OLED2 has a defect in the second pixel P2 of the first pixel P1 and the second pixel P2 of the organic light emitting diode display 100 according to another exemplary embodiment. In this case, it is necessary to repair the defective light emitting part of the second pixel P2 .

When a defect occurs in the organic light emitting diode OLED2 in the second pixel P2, the cutting point CP of the second pixel P2 is cut.

In order to disconnect the driving circuit DRC 2 of the second pixel P2 and the organic light emitting diode OLED 2 , the second pixel at the first electrode of the organic light emitting diode OLED 2 of the second pixel P2 is disconnected. The cutting point CP2 is cut in the driving circuit DRC 2 of (P2).

On the other hand, when the repair process for the light emitting part defect described above is performed, compared to before the repair process, the luminance is reduced.

Accordingly, the organic light emitting diode display according to another exemplary embodiment may compensate for a decrease in luminance of a pixel that has undergone repair processing for a defective light emitting unit.

In addition, in the description in relation to luminance compensation below, it is assumed that the pixel structure is the 2-scan-based pixel structure of FIG. 4 . Of course, even with the aforementioned 1-scan-based pixel structure, the luminance compensation concept to be described below may be equally applied.

As shown in FIG. 22 , in the organic light emitting display device 100 according to another exemplary embodiment, a light emitting part defect occurs in the second pixel P2 and thus a repair process has been performed.

This may cause a decrease in luminance because the light emitting part is defective in the second pixel P2 and repair processing is performed. A compensator 800 compensating for luminance in each of the first pixel P1 and the second pixel P2 may be included.

The compensator 800 determines the data compensation amount so that the driving circuit DRC 1 of the first pixel P1 outputs a current having a larger current value than a current value corresponding to a predetermined luminance. When the second pixel P2 is cut at the cutting point, the compensator 800 compensates for the luminance in the pixel, but outputs a current greater than the current value corresponding to the predetermined luminance to the driving circuit DRC of the pixel. A data voltage compensation amount may be determined. Accordingly, the compensation unit 800 transmits the compensation data Data' generated according to the determined data compensation amount or the determined data compensation amount to the data driver IC 810 in the data driver 120 . .

The data driving integrated circuit 810 transmits the received compensation data Data' or the compensation data voltage Vdata' corresponding to the data compensation amount to the driving circuit DRC 1 of the first pixel P1 through the corresponding data line. supply

Meanwhile, in the organic light emitting display device 100 according to another exemplary embodiment, information on the repaired pixel(s) may be stored in a memory (not shown) and used for the above-described luminance compensation.

The above-described compensator 800 may be included inside the timing controller 140 or the data driver 120 , and in some cases, may be included outside the timing controller 140 and the data driver 120 as separate components. may be

As described above, according to the present invention, there is an effect of providing an organic light emitting display device having a repair structure capable of repairing a light emitting unit defect among causes of pixel defects and an organic light emitting display device having a light emitting unit defect repaired. .

Also, according to the present invention, the organic light emitting display device can repair pixel defects by irradiating a laser or the like in the direction of the black matrix even when the cutting point CP is disposed in the non-emission area.

Also, according to the present invention, there is an effect of providing an organic light emitting display device capable of compensating for a decrease in luminance due to repair of a defective light emitting part.

The above description and the accompanying drawings are merely illustrative of the technical spirit of the present invention, and those of ordinary skill in the art to which the present invention pertains can combine configurations within a range that does not depart from the essential characteristics of the present invention. , various modifications and variations such as separation, substitution and alteration will be possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100 to 700: organic light emitting display device 110: display panel
120: data driver 130: gate driver
140: timing controller 220: organic light emitting diode
230, 330, 430, 530, 630, 730: Black Matrix
250, 350, 450, 550, 650, 750: color filter
800: compensation unit
810: data driving integrated circuit DRC: driving circuit (Driving Circuit)
PA: Pixel Area
EA: Emission Area
NA: Non-emission Area
CP: Cutting Point

Claims (17)

an organic light emitting diode including a first electrode and a second electrode in a light emitting area of the pixel area, and an organic layer positioned between the first electrode and the second electrode; and
and a black matrix including a repair opening region located in a non-emission region of the pixel region;
A position of the repair opening area of the black matrix corresponds to a position of a cutting point of a driving circuit for driving the organic light emitting diode. According to claim 1,
It includes a color filter located in the light emitting region,
The black matrix is positioned around the color filter in a non-emission area of the pixel area. According to claim 1,
The driving circuit is positioned at the intersection of the data line and the gate line, and is electrically connected to the organic light emitting diode;
and the driving circuit includes at least one wire disconnected at a cutting point. delete According to claim 1,
The driving circuit includes a driving transistor (DR) positioned between the high potential power supply voltage line and the organic light emitting diode and supplying a driving current to the organic light emitting diode according to a data voltage,
The cutting point may be a first connection pattern electrically connecting the driving transistor and the organic light emitting diode, or a second connection between the driving transistor and a reference voltage line for applying a reference voltage to a source/drain of the driving transistor. An organic light emitting display device positioned on a pattern. According to claim 1,
The repair opening area of the black matrix occupies the entire repair area. 3. The method of claim 2,
The repair opening area of the black matrix is arranged in a stripe type including cutting points in the first direction. 8. The method of claim 7,
The color filter is also located in the repair opening area of the black matrix. 6. The method of claim 5,
and a black bank exposing a portion of the first electrode on the first electrode in the non-emission area;
and the black bank includes an opening region for a bank at the same position as an opening region for repair of the black matrix. 10. The method of claim 9,
an opening region in the same position as the repair opening region of the black matrix in some or all of the other layers positioned between the bank opening region and at least one of the first connection pattern and the second connection pattern organic light emitting display device. 4. The method of claim 3,
In the other organic light emitting diodes located in the adjacent pixel area, in order to compensate for the luminance of the organic light emitting diode whose wiring is disconnected at the cutting point, the driving circuit of the organic light emitting diode has a current value greater than a current value corresponding to the predetermined luminance. An organic light emitting display device that outputs current. a display panel in which a plurality of pixels defined by arrangement of data lines and gate lines are arranged;
a data driver supplying a data voltage to the data lines; and
a gate driver supplying a scan signal to the gate lines;
an organic light emitting diode for emitting light, each of the plurality of pixels including a first electrode and a second electrode in a light emitting area of the pixel area, and an organic layer positioned between the first electrode and the second electrode; and
The non-light-emitting region includes a black matrix including an opening region,
A position of the opening region of the black matrix corresponds to a position of a cutting point of a driving circuit for driving the organic light emitting diode. 13. The method of claim 12,
Three pixels express one color,
Each of the three pixels further includes a color filter positioned in the light emitting area,
The black matrix is positioned around the color filter in a non-emission area of the pixel area. 13. The method of claim 12,
Four pixels express one color,
Each of the four pixels further includes a color filter positioned in the light emitting region, and the black matrix is positioned around the color filter in a non-emission region of the pixel region,
The other pixel does not include a color filter, and the black matrix is positioned in the non-emission area to be the same as other pixels. 13. The method of claim 12,
The repair opening area of the black matrix occupies the entire repair area. 14. The method of claim 13,
The repair opening area of the black matrix is arranged in a stripe type including cutting points in the first direction. 17. The method of claim 16,
The color filter is also located in the repair opening area of the black matrix.

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