KR101279655B1 - Display device - Google Patents

Abstract

The present invention relates to a display device for separating subpixels using a second partition wall. The display device includes first electrode layers, second electrode layers, and subpixels. The first electrode layers are arranged in a first direction, and the second electrode layers are arranged in a second direction different from the first direction. The subpixels are formed in a region where one electrode layer of the first electrode layers and one electrode layer of the second electrode layers intersect. Since the display device separates the subpixels using the second partition wall, even if one of the subpixels is defective, the subpixel can be replaced with another subpixel.

Display element, sub pixel, bulkhead

Description

Display element {DISPLAY DEVICE}

1 is a view showing a conventional display element.

2A illustrates a display device according to a first exemplary embodiment of the present invention.

FIG. 2B is a cross-sectional view illustrating the display device taken along the line II ′ of FIG. 2A.

FIG. 2C is a cross-sectional view illustrating the display device taken along the line II-II ′ of FIG. 2A.

3 is a circuit diagram illustrating the display device of FIG. 2A.

4 is a view showing a display device according to a second preferred embodiment of the present invention.

5 is a diagram illustrating a display device according to a third exemplary embodiment of the present invention.

The present invention relates to a display device, and more particularly to a display device for separating the sub-pixels using a second partition wall.

The display element refers to an element for displaying a predetermined image.

1 is a view showing a conventional display element.

Referring to FIG. 1, a conventional display device includes a panel 100 and a driver 102.

The panel 100 includes a plurality of sub pixels 116 formed in regions where the first electrode layers 110 and the second electrode layers 112 cross each other. Here, three sub-pixels, for example, a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B constitute one pixel 120.

The partitions 114 are insulators and separate the second electrode layers 112.

The first electrode lines 104 connect the first electrode layers 110 and the driver 102, so that the driver 102 transmits the data signals to the first electrode lines 104 and the first electrode layers 110. Through the sub-pixels 116 through.

The second electrode lines 106 and 108 connect the second electrode layers 112 and the driver 102, so the driver 102 sends scan signals to the second electrode lines 106 and 108 and the second electrode layer. To the subpixels 116 via the fields 112.

That is, the driver 102 transmits data signals and scan signals to the sub pixels 116 through the electrode lines 104, 106 and 108 and the electrode layers 110 and 112. Accordingly, the subpixels 116 emit light having a predetermined wavelength to display the predetermined image on the panel 100.

In one conventional display device, when one subpixel is defective, a portion of the panel 100 corresponding to the defective subpixel is darkly displayed. That is, the desired image is not displayed on the panel 100, and such a defect is immediately recognized by the user. Therefore, such panel 100 is found to be a defective product and can no longer be used. That is, the entire panel 100 cannot be used due to a failure of one subpixel, which causes a great waste of the panel 100.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display device capable of continuously using a panel even when one subpixel is defective.

In order to achieve the above object, the display device according to an exemplary embodiment of the present invention includes first electrode layers, second electrode layers, and subpixels. The first electrode layers are arranged in a first direction, and the second electrode layers are arranged in a second direction different from the first direction. The subpixels are formed in a region where one electrode layer of the first electrode layers and one electrode layer of the second electrode layers intersect.

The organic electroluminescent device according to an exemplary embodiment of the present invention includes a plurality of subpixels, first partitions, and second partitions. The subpixels are formed in regions where the first electrode layers and the second electrode layers intersect. The first partition walls separate the second electrode layers. The second partitions separate between subpixels corresponding to the second electrode layer of one of the subpixels. Here, the second partitions are formed in the same direction as the first partitions, and the subpixels facing each other with respect to the second partitions emit light of the same color.

Since the display device according to the present invention separates the subpixels by using the second partition wall, even if one of the subpixels is defective, the subpixel may be replaced with another subpixel. Therefore, waste of the panel can be reduced.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A illustrates a display device according to a first exemplary embodiment of the present invention.

Referring to FIG. 2A, the display device of the present invention includes a panel 200 and a driver 202.

The display device according to an exemplary embodiment of the present invention includes an organic electroluminescent device (PDP), a plasma dispaly panel (PDP), a liquid crystal display (LCD), and the like.

The panel 200 includes subpixels R, G, and B formed in regions where the first electrode layers 210 and the second electrode layers 212 cross each other. Here, the six sub pixels form one pixel 220 as shown in FIG. 2A. For example, the pixel 220 is composed of two red subpixels R, two green subpixels G, and two blue subpixels B. FIG. Of course, the pixel 220 may be formed of subpixels that emit light of colors other than the red, green, and blue subpixels.

The first electrode layer 210 and the second electrode layer 212 are conductors, one of which is a positive electrode and the other of which is a negative electrode. For example, the first electrode layer 210 is made of indium tin oxide as a positive electrode, and the second electrode layer 212 is made of metal, for example, Al as a negative electrode.

The first partitions 214 are formed between the second electrode layers 212 as shown in FIG. 2A.

The second partitions 216 are formed between the same subpixels, for example, red subpixels R, as shown in FIG. 2A.

According to one embodiment of the present invention, the first and second partitions 214 and 216 are made of the same material, for example, photoresist, and are formed together in the same process.

According to another embodiment of the present invention, the first partition 214 has a height greater than that of the second partition 216.

The first electrode lines 204 are conductors and are respectively connected to the first electrode layers 210.

The second electrode lines 206 and 208 are conductors and are respectively connected to the second electrode layers 212.

The driver 202 is connected to the ends of the electrode lines 204, 206 and 208 and transmits drive signals, for example data signals and scan signals, to the electrode lines 204, 206 and 208.

Hereinafter, the structure of the display device of the present invention will be described in detail with reference to FIGS. 2B and 2C.

FIG. 2B is a cross-sectional view illustrating the display device taken along the line II ′ of FIG. 2A, and FIG. 2C is a cross-sectional view illustrating the display device taken along the line II-II ′ of FIG. 2A.

Referring to FIG. 2B, the first electrode layer 210 is formed on the substrate 230, and the organic material layers 234 and the second electrode layers 212 are sequentially formed on the first electrode layer 210. However, the organic layers 234 are separated from each other by the second partition 216. Here, the second partition 216 has an overhang structure in which the upper side has a longer length than the lower side. However, according to another exemplary embodiment of the present invention, the second partition wall 216 may have a static taper structure having an upper side shorter than a lower side.

In addition, the insulating film 232 is formed on the first electrode layer 210, and the first partition wall 214 is formed on the insulating film 232. Here, according to one embodiment of the present invention, the partitions 214 and 216 are made of a material different from the insulating film 232.

As shown in FIG. 2B, the first partition wall 214 separates the second electrode layers 212 so that the second electrode layers 212 are not shorted.

In the above, the second electrode layers 212 are formed on the organic materials 234 while covering the second partitions 216, but the second electrode layers 212 are formed between the second pixels having the same emission color. It may be separated by the 216. However, even in this case, the second electrode layer 212 is not completely separated by the second partition wall 216, and the terminal portion thereof is not separated by the second partition wall 216, for example, as shown in FIG. 2A. Do not. Thus, the subpixels associated with the second electrode lines 206 and 208 emit light for the same emission time during light emission. Detailed description thereof will be described below with reference to the accompanying drawings.

Referring to FIG. 2C, the first electrode layers 210 are arranged in a predetermined pattern on the substrate 230, and the insulating layers 232 are formed between the first electrode layers 210.

In addition, the organic materials 234 are formed on the first electrode layers 210, and the metal material layer 236 is formed on the insulating layers 232 and the organic materials 234. Here, reference numeral 238 denotes a region corresponding to one sub pixel, and a portion corresponding to one sub pixel of the metal material layer 236 is the second electrode layer 212.

Hereinafter, the structure and driving process of the display device of the present invention will be described with reference to FIG.

3 is a circuit diagram illustrating the display device of FIG. 2A.

First, look at the structure of the display device of the present invention.

The first electrode layers 210 and the first electrode lines 204 correspond to the data lines D1 to D6, and the second electrode layers 212 and the second electrode lines 206 and 208 are scan lines. Corresponds to S1 to S12.

As can be seen in FIG. 3, the subpixels formed in one pixel 220 are separated by the second partition 216 to form a plurality of scan lines, for example, S1 and S2, but corresponding scan lines ( S1 and S2 are connected to the driver 202 while being interconnected. As a result, the sub-pixels formed in one pixel 220 emit light simultaneously as described below.

The driver 202 includes scan drivers 300 and 302 connected to the scan lines S1 to S12 and a data driver 304 connected to the data lines D1 to D6.

Next, the driving process of the display element of the present invention will be described in detail.

The first scan driver 300 transmits the first scan signals to a portion S1, S2, S5, S6, S9, and S10 of the scan lines S1 to S12, and the second scan driver 302 is configured as a second scan driver. The scan signals are transmitted to the remaining scan lines S3, S4, S7, S8, S11 and S12. As a result, the scan lines S1 to S12 are sequentially selected in units of two scan lines.

First, S1 and S2 of the scan lines S1 to S12 are selected, that is, S1 and S2 are connected to a light emitting source, for example, ground. In this case, the remaining scan lines S3 to S12 are connected to a non-light emitting source having a voltage having the same magnitude as the driving voltage of the display element of the present invention.

Subsequently, the data driver 304 provides first data currents to the data lines D1 to D6. These data currents flow to the light emitting source through the sub-pixels associated with the data lines D1 to D6 and the scan lines S1 and S2 and the scan lines S1 and S2. As a result, only the subpixels associated with the scan lines S1 and S2 emit light.

Subsequently, S3 and S4 of the scan lines S1 to S12 are selected.

Thereafter, the data driver 304 provides the second data currents to the data lines D1 to D6. These data currents flow to the light emitting source through the sub pixels and the scan lines S3 and S4 associated with the data lines D1 to D6 and the scan lines S3 and S4. As a result, only the sub pixels associated with the scan lines S3 and S4 emit light.

Subsequently, S5 and S6 of the scan lines S1 to S12 are selected.

Thereafter, the data driver 304 provides third data currents to the data lines D1 to D6. These data currents flow to the light emitting source through the sub-pixels associated with the data lines D1 to D6 and the scan lines S5 and S6 and the scan lines S5 and S6. As a result, only the sub pixels associated with the scan lines S5 and S6 emit light.

The above process proceeds to the last scan lines S11 and S12, and then the light emission process is continuously repeated in units of frames, that is, in units of scan lines S1 to S12.

In sum, in the display device of the present invention, the subpixels associated with one second electrode layer 212 are separated by a second partition 216 as shown in FIG. 2A. However, although the subpixels are connected together to the second electrode line 206 or 208 despite being separated by the second partition 216, the subpixels emit light at the same time. Therefore, even if a failure occurs in one of the subpixels, for example, the R subpixels, which emit the same color among the subpixels related to the second electrode layer 212 and face the second partition 216. The other subpixel emits light. That is, the remaining subpixels may replace the defective subpixels to continuously generate light of the same color. However, when one subpixel is defective, the light emitting device of the present invention detects the defective subpixel before driving the light emitting device so that the defective subpixel does not affect other subpixels. Removal is performed using a laser or the like, and then the light emitting device is driven, that is, the subpixels are emitted. As a result, even if a defect occurs in one subpixel, another subpixel can be replaced without being affected by the defective subpixel. Thus, unlike a conventional light emitting device in which a subpanel is defective, the entire panel cannot be used. The light emitting device of the present invention can continuously use the panel 200.

In the above, although the subpixels related to the second electrode layer 212 are separated by one second partition wall 216, the subpixels may be separated by a plurality of second partition walls. In this case, one pixel consists of at least nine subpixels.

4 is a view showing a display device according to a second preferred embodiment of the present invention.

Referring to FIG. 4, the display element of the present embodiment includes a panel 400 and a driver 402.

The partitions 404 separate the sub pixels. However, unlike in the first embodiment, in the second embodiment, the partitions 404 are present for each pixel. Therefore, the partition wall 404 does not exist between the pixels, so that during light emission, a data current flows through the space between the pixels in the second electrode layer. As a result, when data current flows to the light emitting source through the data lines, the second electrode layer, and the second electrode line connected to the second electrode layer, the resistance of the path through which the data current flows is reduced than the resistance of the first embodiment. . Therefore, the display element of the second embodiment can emit the subpixels with the same luminance even though a data current having a smaller magnitude than that of the display element of the first embodiment is applied.

5 is a diagram illustrating a display device according to a third exemplary embodiment of the present invention.

Referring to FIG. 5, the display element of the present embodiment includes a panel 500 and a driver 502.

The partitions 504 are arranged between each subpixel as shown in FIG. 5. Thus, the display element of the third embodiment can lower power consumption than the display elements of the first and second embodiments.

In the above embodiments, the second electrode lines are arranged in both directions of the panel, but may be arranged in one direction of the panel.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, additions within the spirit and scope of the present invention, such modifications, changes and Additions should be considered to be within the scope of the following claims.

As described above, the display device according to the present invention separates the subpixels by using the second partition wall, so that even if one of the subpixels is defective, the defective subpixel can be replaced with another subpixel. There is an advantage. Therefore, waste of the panel can be reduced.

Claims (11)

First electrode layers arranged in a first direction; Second electrode layers arranged in a second direction different from the first direction; First barrier ribs separating the second electrode layers; And Second barrier ribs separating the subpixels in subpixels formed in an area where an electrode layer of one of the first electrode layers and an electrode layer of the second electrode layers intersect each other; And the second partitions have a lower height than the first partitions. delete The method of claim 1, wherein the subpixels each include an organic material layer formed between the first electrode layer and the second electrode layer. And the organic layers are separated by the second partition wall. The display device of claim 1, wherein the second partition wall has a static taper structure having a top side having a length shorter than a bottom side. The display device according to claim 1, wherein the second partition wall is made of photoresist. The display device of claim 1, wherein the subpixels emit light of the same color and are connected together to a light emitting source through corresponding scan lines. The display device of claim 1, wherein the display device comprises: First electrode lines connected to the first electrode layers; And Further comprising second electrode lines connected to the second electrode layers, And the subpixels are connected to one of the second electrode lines. The method of claim 1, wherein the subpixels are: Display device comprising a light emitting layer made of an organic material. A plurality of subpixels formed in regions where the first electrode layers and the second electrode layers cross each other; First barrier ribs separating the second electrode layers; And Second partitions separating the subpixels corresponding to the second electrode layer of the one of the subpixels, The second partitions are formed in the same direction as the first partitions, and the subpixels facing each other emit light of the same color based on the second partitions, and the second partitions are lower than the first partitions. An organic electroluminescent element, characterized by having a height. The organic electroluminescent device according to claim 9, wherein the sub-pixels facing each other are separated by the second partition wall, but are interconnected by the second electrode layer to emit light together when emitting light. The organic electroluminescent device of claim 9, wherein the first and second barrier walls are made of the same material.

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