KR100953419B1 - Liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device. In the liquid crystal display according to the present invention, a plurality of TFT channel portions in which a top plate, a gate electrode, an insulating film, a semiconductor film, a data electrode, and a passivation mask are sequentially arranged are arranged along a gate line and the data electrode formed along the gate electrode. A liquid crystal display device comprising a lower plate on which a matrix of the formed data lines is formed, the liquid crystal display device comprising a black mask made of metal, wherein the black mask is formed on the passivation layer and formed along the gate line. As a result, when the line is opened, a liquid crystal display device which is easy to repair is provided.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

1 is a gate ring structure of a lower plate of a conventional liquid crystal display device

FIG. 2A is a bottom view of a liquid crystal display including a TFT channel unit according to an embodiment of the present invention, in which a black mask is omitted. FIG.

Figure 2b is a simplified cross section of Figure 2a with a black mask

3A, 3B, 3C, and 3D are views showing the position of the black mask of FIG.

FIG. 4 is a diagram illustrating a gate line open repair method using the structure of the black mask of FIG. 2B.

  * Explanation of symbols for the main parts of the drawings

  1: top plate of liquid crystal display device 3 bottom plate of liquid crystal display device

  5: gate line 5 ': conventional ring gate structure

 5'a: conventional gate line 5'b: conventional gate line

  7: data line 7 ': conventional data line

  9 TFT channel section 10 black mask

 51 gate electrode 53 insulating film

 55 semiconductor film 71 data electrode                 

 73: shield

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device that is easily repaired when a line is opened when COA (Color Filter on Array), which is a structure in which RGB is formed on a lower plate, is applied.

As shown in FIG. 1, a liquid crystal display generally has a ladder structure in which a gate line is formed in a double structure so that a signal may be applied through another gate line 5 ′ b even when a part of the gate line 5 ′ a is opened. And a ring gate structure 5 '. In this case, the double gate line reduces the area actually displayed without the gate line, the data line, or the black mask per unit pixel, thereby relatively decreasing the aperture ratio. Therefore, in the case of the high-aperture-rate structure, the gate ring free structure which does not use the ring gate structure 5 'is formed, and it becomes a structure vulnerable to line opening.

Accordingly, an object of the present invention is to provide a liquid crystal display device that is easy to repair when the line is open.

The object of the present invention is to provide a plurality of TFT channel portions in which a top plate, a gate electrode, an insulating film, a semiconductor film, a data electrode and a protective film are sequentially arranged, and a gate line formed along the gate electrode and a data line formed along the data electrode. A liquid crystal display device comprising a lower plate having a matrix formed thereon, wherein the liquid crystal display device comprises a black mask made of metal, and the black mask is formed on the passivation layer and formed along the gate line.

In this case, it is preferable to further form a black mask provided on the passivation layer along the data line.

The object of the present invention is to form a plurality of TFT channel portions in which a top plate, a gate electrode, an insulating film, a semiconductor film, a data electrode, a protective film, and a pixel electrode are sequentially arranged and formed along a gate line and the data electrode formed along the gate electrode. A liquid crystal display device comprising a lower plate on which a matrix of data lines is formed, wherein the liquid crystal display device comprises a black mask made of metal, and the black mask is provided on the passivation layer on each TFT channel portion and follows the gate line. It is also achieved by a liquid crystal display device characterized in that it is formed before the TFT channel portion.

At this time, it is preferable to further form the black mask provided on the passivation layer of each TFT channel portion along the data line until the next TFT channel portion.

Hereinafter, with reference to the accompanying drawings will be described in detail. For the sake of convenience, the same parts shown in the drawings use the same numbers.

As shown in FIG. 2A, a gate electrode 51, an insulating film 53, a semiconductor film 55, a data electrode 71, and a protective film 73 are formed in the TFT channel portion of the lower plate 3 of the liquid crystal display device. Masked in turn.                     

As shown in FIG. 2B, a black mask 10 is provided on the passivation layer 73.

In a liquid crystal display device to which a color filter on array (COA) is applied, in which a RGB is formed on a lower plate, an RGB layer is added on the black mask 10. Thus, the structure of the pixel layer is not directly in contact with the metal of the pixel electrode provided on the RGB layer to apply a voltage to the liquid crystal.

As shown in FIG. 3A, a black mask 10 made of metal is provided along the gate line 5 from an upper portion of the passivation layer 73.

As shown in FIG. 3B, the protection layer 73 may be provided along the data line 7 from the upper portion of the passivation layer 73.

3C and 3D, the black mask 10 may be provided pixel by pixel along the gate line 5 and the data line 7.

As shown in FIG. 4, when the gate line 5 is open, a metal is melted using a laser to short-circuit the open line and the black mask 10. Therefore, a gate signal is applied to the black mask 10 to heal the line open defect.

Similarly, when the data line 7 is open, the metal is melted using a laser to short the open line and the black mask 10. Accordingly, a data signal is applied to the black mask 10 to heal the line open defect.

The black mask is generally provided on the upper plate of the liquid crystal display device and used to prevent light leakage or to protect the TFT channel. When the thickness is large, a black mask generates a step at the pattern boundary. Therefore, the overcoat is used for the step compensation, but in recent years, the overcoat is omitted in terms of process simplification and cost reduction. Thus, liquid crystals lie along the slope between the black mask and the non-black mask, and there is a problem that light leakage occurs in the area.

In the present invention, as a result of providing the black mask 10 on the lower plate 3, the upper plate 1 only has an ITO electrode formed of a transparent conductive film or a columnar column spacer used to maintain the cell gap during the liquid crystal process. Therefore, the generation of the step can be reduced.

In addition, when the upper plate (1) and the lower plate (3) is not accurately arranged during the assembly process, the risk of opening ratio is reduced due to the black mask 10 provided on the upper plate (1).

As described above, according to the present invention, a liquid crystal display device which is easy to repair when a line is opened is provided.

Claims (4)

A matrix comprising a top plate, a plurality of TFT channel portions in which a gate electrode, an insulating film, a semiconductor film, a data electrode, and a protective film are sequentially masked, and a gate line formed along the gate electrode and a data line formed along the data electrode are provided. In the liquid crystal display device comprising a lower plate, The liquid crystal display device includes a black mask made of metal, The black mask is formed on the passivation layer and formed along the gate line. And when the gate line is open, melting the metal of the black mask using a laser to electrically contact the open gate line and the black mask. The method of claim 1, And a black mask provided on the passivation layer and formed along the data line. A plurality of TFT channel portions in which a top plate, a gate electrode, an insulating film, a semiconductor film, a data electrode, a protective film and a pixel electrode are sequentially masked are arranged, and a gate line formed along the gate electrode and a data line formed along the data electrode are formed. In the liquid crystal display device comprising a lower plate provided with a matrix, The liquid crystal display device includes a black mask made of metal, The black mask is formed above the passivation layer of each TFT channel part and is formed along the gate line until the next TFT channel part. And when the gate line is opened, melting the metal of the black mask using a laser to electrically contact the open gate line and the black mask. The method of claim 3, And a black mask formed over the passivation layer of each TFT channel portion and formed before the next TFT channel portion along the data line.

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