KR20040108140A - repairable FPD and fabrication method thereof - Google Patents

Abstract

PURPOSE: A flat panel display device and a method for manufacturing the same are provided to eliminate the disconnection problem of signal lines by repairing line defects by using a black matrix layer, thereby improving the yield. CONSTITUTION: A plurality of gate lines(110) and data lines(120) cross each other. A plurality of pixels are arranged in a plurality of pixel areas defined by the plurality of gate lines and data lines in matrix shape. A conductive film for repair is overlapped with the predetermined number of gate lines and data lines, wherein the conductive film for repair is formed separately on the predetermined number of pixels.

Description

Repairable flat panel display device and manufacturing method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device, and more particularly, to a flat panel display device capable of repairing line defects using a black matrix and a manufacturing method thereof.

Active matrix flat panel display devices, such as liquid crystal display devices or organic light emitting display devices, are discarded when defects occur during the manufacturing process, resulting in lower yields and higher manufacturing costs. Conventionally, defects generated during the manufacturing process have been repaired to improve the yield and reduce the manufacturing cost.

Generally, defects generated during the manufacturing process include point defects and line defects. A repair technique for suppressing leakage of charges due to pixel defects (dot defects) due to line defects is disclosed in US Pat. No. 6,437,341. The repair technique includes a pixel defect correction portion that is easily cut by a laser at a part of an electrode connecting the pixel electrode and the data electrode, and repairs the defect by cutting the pixel defect correction portion with a laser when a defect occurs.

Meanwhile, line defects include line shorts or line breaks, and US Patent No. 6,441,401 discloses a technique for repairing a line break using a repair auxiliary line. In the repair technique, a repair auxiliary line made of the same material as the source / drain electrode material is formed at a portion where the gate line and the storage electrode line cross or at a portion where the data line and the storage electrode line cross, thereby repairing disconnection or short circuit of the gate line or data line. It was.

However, the conventional repair method as described above has a problem that the display device is not only complicated in structure but also difficult to be applied as the display device becomes small and high resolution by forming a separate line to perform repair.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and an object thereof is to provide a flat panel display device and a repair method thereof that can solve a disconnection defect of a signal line without an additional process using a black matrix.

1 is a planar structure diagram of a repairable flat panel display device according to an embodiment of the present invention;

2A and 2B are cross-sectional structure diagrams of a flat panel display device taken along a line IIA-IIA 'of FIG. 1;

3 to 5 are plan views of a repairable flat panel display device according to another embodiment of the present invention;

* Description of the symbols for the main parts of the drawings *

100, 200, 300, 400, 500: insulated substrate 141, 143: thin film transistor

110, 210, 310, 410, 510: gate line 145: capacitor

120, 320, 420, 520: data line 147: pixel electrode

130, 330, 430, 530: common power line 202: buffer layer

150, 201, 350, 450, 550: Black Matrix

In order to achieve the object as described above, the present invention comprises a plurality of gate lines and data lines crossing each other; A plurality of pixels arranged in a matrix form of columns and rows in a plurality of pixel regions defined by the plurality of gate lines and data lines; A flat panel display device including a repair conductive layer overlapping a predetermined number of gate lines and a predetermined number of data lines among the plurality of gate lines and a plurality of data lines and separately formed for each predetermined number of pixels among the plurality of pixels. It is characterized by.

The repair conductive film may be separately formed for one pixel of the plurality of pixels, or may be separately formed for a predetermined number of pixels among a plurality of pixels arranged along one column of the plurality of pixels, or among the plurality of pixels. The repairing conductive film is formed by a plurality of pixels arranged in a predetermined number of columns and rows, and the repair conductive film is a black matrix for blocking light incident to the display device from the outside.

In addition, the present invention includes a plurality of gate lines and data lines crossing each other; A plurality of pixels arranged in a matrix form of columns and rows in a plurality of pixel regions defined by the plurality of gate lines and data lines; A flat panel display including a plurality of black matrices that are formed to be overlapped with the gate line and the data line to be separated for each pixel. When the disconnection occurs in the gate line or the data line, the gate line or data line in which the disconnection occurs is generated. It is characterized in that it provides a repair method of a flat panel display device to repair by connecting to a corresponding black matrix of a plurality of black matrix.

The black matrix is separately formed for each pixel of the plurality of pixels, and the black matrix is disposed in the black matrix most adjacent to the disconnection portion of the black matrix arranged adjacent to the line where the disconnection occurs in the plurality of gate lines or data lines. Black connected to be repaired by being connected or separated by a predetermined number of pixels among a plurality of pixels arranged along one column of the plurality of pixels, and arranged adjacent to a line where a disconnection occurs in the plurality of gate lines or data lines. The repair conductive film is connected to a black matrix arranged closest to the disconnection portion of the matrix, or the repair conductive film is separated and formed for a predetermined number of pixels among the plurality of pixels arranged along one row of the plurality of pixels. A plurality of gate lines or data lines arranged adjacent to a line where a disconnection occurs The black matrix is repaired by being connected to the black matrix arranged closest to the disconnection part of the black matrix, or separately formed by a plurality of pixels arranged in a predetermined number of columns and rows of the plurality of pixels, and among the plurality of gate lines or data lines. The black matrices arranged adjacent to the line where the disconnection has occurred may be repaired by being connected to the black matrices arranged closest to the disconnection part.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 illustrates a planar structure of an organic light emitting display device that can be repaired using a black matrix according to an embodiment of the present invention.

Referring to FIG. 1, in a repairable organic light emitting display device according to an exemplary embodiment, a plurality of pixels are formed by a plurality of gate lines 110, a plurality of data lines 120, and a plurality of common power lines 130. A plurality of pixels are formed in the region 100, respectively. Each pixel arranged in each pixel region includes an EL element having two transistors 141 and 143, one capacitor 145, and a pixel electrode 147.

In addition, the display device includes a light blocking black matrix 150 arranged in each pixel area. The black matrix 150 is formed to be separated from each other between neighboring pixels, and is used as a repair line for repairing disconnection of the gate line 110 or the data line 120 as well as the light blocking layer, and thus has a light blocking characteristic. Is made of. As the conductive material for the black matrix, a conventional black matrix material may be used or MIHL having a concentration gradient may be used.

2A and 2B are cross-sectional views illustrating a method of repairing disconnection of a gate line or a data line using a black matrix in the organic light emitting display device of the present invention, and FIGS. 2A and 2B are IA of FIG. 1. It is a cross-sectional structure along the 'IA' line.

A display device having a structure in which black matrices as shown in FIG. 1 are arranged for each pixel or unit pixel is related to a method of repairing disconnection generated in the gate line 110 using a black matrix.

In other words, the display device according to the exemplary embodiment of the present invention is formed by a conventional organic light emitting display device, and is shown in FIG. 2A by being limited to the gate line 210 where disconnection occurs. Referring to FIG. 2A, a black matrix 201 is formed on an insulating substrate 100, and a buffer layer 202 is formed on a substrate including the black matrix 201. A single oxide film or nitride film may be formed in the buffer layer 202 or may be formed in a stacked structure of an oxide film and a nitride film.

A gate line 210 made of a conductive material, for example, a metal material, is formed on the buffer layer 202. The gate line 210 has a disconnection defect, causing the first portion 211 and the second portion 215. It is disconnected.

Referring to FIG. 2B, when the laser is irradiated to the first portion 211 and the second portion 215 of the gate line 210 where the disconnection has occurred, the metal material of the gate line 210 is formed through the buffer layer 202. The first and second portions 211 and 215 of the gate line 210 are connected to the black matrix 201 and are repaired because they are connected through the black matrix 150.

In the exemplary embodiment of the present invention, only the buffer layer 202 is present on the gate line 210 and the black matrix 201, but the buffer layer and the gate insulating layer are formed on the gate line 210 and the black matrix 201 according to the structure of the TFT. Alternatively, a multilayer insulating film may exist, such as an interlayer insulating film.

3 to 5 illustrate a planar structure of a repairable organic light emitting display device according to another embodiment of the present invention.

In the organic light emitting display device of FIG. 3, the black matrix 350 is formed and repaired for unit pixels arranged in rows of a plurality of unit pixels arranged in the plurality of unit pixel regions 300. For example, repairing a plurality of unit pixels arranged in one row of a plurality of rows, such as 2x1, 3x1, 4x1, ....

In the organic light emitting display device of FIG. 4, the black matrix 450 is formed and repaired for unit pixels arranged for each row of a plurality of unit pixels arranged in the plurality of unit pixel regions 400. For example, repairing a plurality of unit pixels arranged in one column of a plurality of columns such as 1x2, 1x3, 1x4, ....

In the organic light emitting display device of FIG. 5, the black matrix 550 is formed and repaired for some unit pixels arranged in rows and columns among the plurality of unit pixels arranged in the plurality of unit pixel regions 400. For example, 2x3, 3x2, 3x3, 3x4, 4x3, .., etc. are repaired in matrix form of columns and rows.

As described above, the black matrix is formed so as to be separated from each other for each pixel or unit pixel, or each pixel or unit pixel, and a disconnection occurs in a plurality of gate lines or data lines, or each gate line or data. This is to enable repair in the case where disconnection occurs in a large number of lines, and to prevent interference of signals between neighboring lines.

Therefore, when a disconnection occurs in a plurality of data lines or any one of the data lines, the black matrix arranged adjacent to the disconnected line is connected to the black matrix closest to the disconnection portion of the disconnected line. It is desirable to repair.

In the organic light emitting display device according to the embodiment of the present invention, the structure of the black matrix is not limited to the structure of the black matrix shown in FIGS. 1 to 5, but overlaps with the gate line or the data line, so that the gate line or Any structure that connects to a data line is possible. In addition, although the black matrix is formed under the buffer layer, the present invention is not limited thereto, but any position capable of performing a function as a light blocking film that blocks external light and repairing disconnection defects is possible.

According to the embodiment of the present invention as described above, by allowing the repair using the black matrix layer, it is possible not only to block the external light to improve the brightness, but also to solve the disconnection defect of the gate line or the data line to improve the yield. There is an advantage that can be improved. In addition, since the use of the black matrix, no additional process for repair is required, which has the advantage of simplifying the process.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (11)

A plurality of gate lines and data lines crossing each other; A plurality of pixels arranged in a matrix form of columns and rows in a plurality of pixel regions defined by the plurality of gate lines and data lines; And a repair conductive layer overlapping a predetermined number of gate lines and a predetermined number of data lines among the plurality of gate lines and the plurality of data lines, the repair conductive layer being formed separately for a predetermined number of pixels among the plurality of pixels. Device. The flat panel display of claim 1, wherein the repair conductive film is formed separately for each pixel of the plurality of pixels. The flat panel display of claim 1, wherein the repair conductive film is formed separately by a predetermined number of pixels among the plurality of pixels arranged along one column of the plurality of pixels. The flat panel display of claim 1, wherein the repair conductive film is formed by a predetermined number of pixels among the plurality of pixels arranged along one row of the plurality of pixels. The flat panel display of claim 1, wherein the repair conductive film is formed separately by a plurality of pixels arranged in a predetermined number of columns and rows of the plurality of pixels. The flat panel display according to any one of claims 1 to 5, wherein the repair conductive film is a black matrix for blocking light incident on the display device from the outside. A plurality of gate lines and data lines crossing each other; A plurality of pixels arranged in a matrix form of columns and rows in a plurality of pixel regions defined by the plurality of gate lines and data lines; A flat panel display including a plurality of black matrices which are formed to overlap each of the gate lines and data lines and are formed separately for each pixel. And when the disconnection occurs in the gate line or the data line, repairing the disconnected gate line or data line by connecting the gate line or the data line to a corresponding black matrix among a plurality of black matrices. 8. The black matrix of claim 7, wherein the black matrix is separately formed for each pixel of the plurality of pixels, and the black matrix is adjacent to the disconnection portion of the black matrix arranged adjacent to the line where the disconnection occurs in the plurality of gate lines or data lines. The repair method of a flat panel display device characterized in that the repair by connecting to the black matrix arranged. 8. The black matrix of claim 7, wherein the black matrix is separately formed for a predetermined number of pixels among the plurality of pixels arranged along one column of the plurality of pixels, and the black matrix is formed on a line where disconnection occurs among the plurality of gate lines or data lines. A repairing method of a flat panel display device, characterized in that for repairing by connecting to a black matrix arranged closest to a disconnection portion among the adjacently arranged black matrices. 8. The line of claim 7, wherein the repair conductive layer is formed separately by a predetermined number of pixels among the plurality of pixels arranged along one row of the plurality of pixels, and thus a disconnection occurs in the plurality of gate lines or data lines. A repair method for a flat panel display device, characterized in that for repairing by connecting to a black matrix arranged closest to a disconnected portion among the black matrices arranged adjacent to each other. 8. The repair conductive film of claim 7, wherein the repair conductive film is formed by a plurality of pixels arranged in a predetermined number of columns and rows of the plurality of pixels, and is arranged adjacent to a line where a disconnection occurs in the plurality of gate lines or data lines. A repair method of a flat panel display device, characterized in that for repairing by connecting to a black matrix arranged closest to the disconnected portion of the black matrix.