KR20070013834A - Liquid crystal display and method for manufacturing of the same - Google Patents

Abstract

A liquid crystal display and a method for manufacturing the same are provided to decrease an inferiority rate by easily confirming deviation generated according to an aligning state when a driving integrated circuit is attached to a liquid crystal panel, and validity of deviation, thereby improving the yield. A liquid crystal display panel has a plurality of pad parts(PAD) at an outer block and signal lines(103) arranged on the pad parts. A first align key is formed at one side or both sides of the pad, formed of a plurality of graduations arranged at first gaps. A tape circuit board(110) has output channels(112) connected with the signal lines of the liquid crystal display panel, and a driving integrated circuit for supplying a driving signal to the liquid crystal display panel through the output channels. A second align key is formed at one side or both sides of the tape circuit board corresponding to the first align key, formed of a plurality of graduations arranged at second gaps.

Description

Liquid crystal display and method for manufacturing the same {Liquid crystal display and method for manufacturing of the same}

1 is a configuration diagram of a liquid crystal display according to an exemplary embodiment of the present invention.

2 is an enlarged view of a part of FIG. 1.

3 is a partial configuration diagram in which a part of FIG. 2 is enlarged.

4 is a flowchart illustrating a manufacturing method of a liquid crystal display according to an exemplary embodiment of the present invention.

5 is a reference diagram for describing FIG. 4.

(Explanation of symbols for the main parts of the drawing)

100: liquid crystal display panel 101: color filter substrate

102: array substrate 103: signal line

110: tape wiring board 111: drive integrated circuit

112: output channel 120: printed circuit board

130: Align key 131: First alignment key 132: Second alignment key 133, 134: Reference scale

PAD: Pad part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a manufacturing method thereof, and more particularly, to a liquid crystal display device and a manufacturing method thereof for improving alignment.

The liquid crystal display device injects a liquid crystal material having anisotropic dielectric constant between a color filter substrate, which is an upper transparent insulating substrate, and an array substrate, which is an upper transparent insulating substrate, and adjusts the strength of an electric field formed in the liquid crystal material to adjust molecules of the liquid crystal material. A display device expresses a desired image by changing an arrangement and adjusting an amount of light transmitted through a transparent insulating substrate through the arrangement. As the liquid crystal display, a thin film transistor liquid crystal display (TFT LCD) using a thin film transistor (TFT) as a switching element is mainly used.

The liquid crystal display includes a liquid crystal display panel in which an image is largely displayed, and a driver including a drive integrated circuit located at an outer side of the liquid crystal display panel to drive the liquid crystal display panel.

Recently, a chip on glass (COG) or a gate in panel (GIP) is used in order to reduce unnecessary bezel areas by changing a method of packaging a driving integrated circuit on a liquid crystal display panel. Liquid crystal display panels having structures such as panels) are also introduced.

In the liquid crystal display panel except for the chip on glass or the gate-in panel structure, a tape wiring board on which a driving integrated circuit is mounted is attached to the liquid crystal display panel to apply a driving signal. In this case, the tape wiring board may include a tape carrier package (TCP) or a chip on film (COF).

However, in the conventional liquid crystal display device, a guide hole is provided in a portion of the tape wiring board, and a driving integrated circuit is mounted in accordance with the guide hole, so that the tape wiring board is attached or attached to the liquid crystal display panel. After that, the alignment between the liquid crystal display panel and the driving integrated circuit could not be easily and accurately confirmed.

Therefore, if the alignment between the two is not good, defects may occur, causing deterioration of image quality such as greenish or flicker.

Therefore, the technical problem to be achieved by the present invention is to make it easy to confirm the deviation and the validity of the deviation caused by the alignment state when attaching the driving integrated circuit to the liquid crystal display panel, thereby reducing the failure rate to improve the yield It is to provide a liquid crystal display device.

Another object of the present invention is to provide a method of manufacturing a liquid crystal display device capable of efficiently manufacturing the above-described liquid crystal display device.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to an exemplary embodiment of the present invention, a liquid crystal display device includes a liquid crystal display panel having a plurality of pad parts formed on an outer side thereof, and signal lines arranged on the pad part, and one or both sides of the pad part. And a first alignment key having a plurality of scales arranged at first intervals, and output channels connected to the signal lines of the liquid crystal display panel, and driven through the output channels. A tape wiring board on which a drive integrated circuit for supplying a signal is mounted, and a plurality of scales formed on one or both sides of the tape wiring board so as to correspond to the first alignment key, and having a plurality of scales arranged at a second interval; And an alignment key.

In addition, according to an embodiment of the present invention, a method of manufacturing a liquid crystal display device may include forming a plurality of pad parts on an outer side of a liquid crystal display panel, forming signal lines on the pad part, and forming a plurality of pad lines on one or both sides of the pad part. Forming a first alignment key consisting of a plurality of graduations arranged at one interval, forming output channels corresponding to the signal lines on a tape wiring board, and at one or both sides of the tape wiring board Forming a second alignment key consisting of a plurality of graduations arranged at a second interval, and attaching the tape wiring substrate to the liquid crystal display panel to connect the signal lines and the output channels, respectively; Characterized in that.

Specific details of other embodiments are included in the detailed description and drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

Hereinafter, a liquid crystal display according to an exemplary embodiment and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 2 is a partial block diagram of an enlarged part of FIG. 1, and FIG. 3 is a partial block diagram of an enlarged part of FIG. 2.

1 to 3, a liquid crystal display according to an exemplary embodiment of the present invention may include a liquid crystal display panel 100, a tape wiring board 110, first and second printed circuit boards 120, and first and second devices. And an alignment key 130 or the like.

The liquid crystal display panel 100 includes an array substrate 102 and a color filter substrate 101 on which a black matrix, a color filter, and the like are formed to face each other, and has a structure in which liquid crystal is injected into a space therebetween. A plurality of pad parts PAD is formed outside the array substrate 102, and signal lines 103 are arranged at regular intervals in each pad part PAD.

Here, the signal lines 103 are collectively referred to as data lines and gate lines disposed on the liquid crystal display panel 100 to apply a driving signal output from the driving integrated circuit 111 mounted on the tape wiring board 110. In the substrate 102, a thin film transistor, a pixel electrode, and the like are formed at a portion where each data line and the gate line cross each other.

Since the array substrate 102 has a larger area than the color filter substrate 101, a portion not covered by the color filter substrate 101 is formed on the array substrate 102 when the two substrates are bonded together. The pad units PAD for applying a driving signal to the signal line 103 of the liquid crystal display panel 100 are positioned in the LCD panel 100.

The pad part PAD is connected to the driving integrated circuit 111, and the tape wiring board 110 is connected to the first and second printed circuit boards 120.

Output channels connected to the signal lines 103 of the liquid crystal display panel 100 are formed on the tape wiring board 110, and a driving signal is applied to the liquid crystal display panel 100 through the output channels. The tape wiring board 110 is in the form of a tape carrier package or a chip-on film, and the first and second printed circuit boards 120 may be formed by tab soldering using lead, an anisotropic conductive film (ACF), or the like. )

The anisotropic conductive film is a kind of thermosetting resin film containing small conductive particles. The anisotropic conductive film is attached to the pad portion PAD of the liquid crystal display panel 100 to be conductively bonded, and the tape wiring substrate 110 is attached to the pad portion ( After attaching it in accordance with PAD), apply electrical contact with proper heat and pressure.

The alignment key 130 is configured on the outside of the tape wiring board 110 and the outside of the liquid crystal display panel 100 so that the alignment state of the tape wiring board 110 can be easily confirmed.

The first alignment key 131 is formed on one side or both sides of the pad portion PAD and includes a plurality of scales arranged at a first interval d1.

The second alignment key 132 is formed on one side or both sides of the tape wiring board 110 so as to correspond to the first alignment key 131, and includes a plurality of scales arranged at a second interval d2.

Here, as shown in FIG. 3, the first interval d1 in which each scale of the first alignment key 131 is arranged is the second interval d2 in which each scale of the second alignment key 132 is arranged. It is preferable to form longer.

As such, when the first interval d1 has a larger value than the second interval d2, the first alignment key 131 is a reference that becomes the center of the plurality of scales arranged at the first interval d1. In the state in which the scale 133 coincides with the reference scale 134 of the second alignment key 132, the interval that is shifted from each scale of the second alignment key 132 is constant as the scale moves away from the center to the left and right. (For example, 1 µm or the like).

In this case, the interval at which each scale of the first alignment key 131 corresponding to the scales of the second alignment key 132 is shifted from each scale of the second alignment key 132 is a reference scale that is the center. It is preferable to increase by a predetermined value as it moves to the left and right from (133, 134).

For example, when an alignment defect of about 1 μm occurs between the tape wiring board 110 and the pad portion PAD, the first alignment key 131 and the second alignment key 132 are configured, respectively. All of the corresponding scales are shifted by 1 μm so that the deviation and the validity of the alignment can be easily confirmed.

4 is a flowchart illustrating a method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 5 is a reference view for explaining FIG. 4.

First, in step S100, a plurality of pad parts PAD are formed on the outside of the liquid crystal display panel 100, and signal lines 103 arranged at regular intervals are formed on the pad part PAD.

Next, in operation S110, a first alignment key 131 including a plurality of scales arranged at first intervals d1 is formed at one side or both sides of the pad unit PAD.

Next, in step S120, the output channels 112 are formed on the tape wiring board 110 at intervals corresponding to the signal lines 103. Here, the tape wiring board 110 is a tape carrier package or a chip on film.

Next, in operation S130, a second alignment key 132 including a plurality of graduations arranged at one or both sides of the tape wiring board 110 at second intervals d2 is formed.

Here, the first interval d1 is preferably longer than the second interval d2. The first alignment key 131 has a state in which the reference scale 133, which is the center of the plurality of scales arranged at the first interval d1, coincides with the reference scale 134 of the second alignment key 132. In this case, the distance shifted from the center to the left and right is formed such that the interval shifted from each scale of the second alignment key 132 is increased by a predetermined value.

In this case, the interval at which each scale of the first alignment key 131 corresponding to the scales of the second alignment key 132 is shifted from each scale of the second alignment key 132 is a reference scale that is the center. It is preferable to increase by a predetermined value away from the left and right (133, 134).

Next, in step S140, the tape wiring board 110 is attached to the liquid crystal display panel 100 to connect the signal lines 103 and the output channels 112, respectively.

In steps S110 and S130, the alignment key 130 is set to be deflected left and right about the center reference marks 133 and 134, and shifted when the tape wiring board 110 is attached to the pad part PAD. By shifting the tape wiring board 110 and the liquid crystal display panel 100 as much as you want to know the degree, the deviation can be easily confirmed.

For example, assuming that the left side is in the (-) direction and the right side is in the (+) direction, the degree to which the tape wiring board 110 is shifted to the left side based on the liquid crystal display panel 100 by the (-) value is known. The degree to which the tape wiring board 110 is shifted to the right side based on the liquid crystal display panel 100 can be known by the positive value.

The output channel 112 of the tape wiring board 110 may be formed of copper wiring, or the like, and together with the first alignment key 131 during metal deposition for forming copper wiring, or an array on the liquid crystal display panel 100. The second alignment key 132 may be formed together in the photolithography process of the third to fifth masks for forming the thin film transistor on the substrate 102.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

The liquid crystal display according to the exemplary embodiment of the present invention configured as described above can easily confirm the deviation and the validity of the deviation caused by the alignment state when attaching the driving integrated circuit to the liquid crystal display panel, thereby reducing the defect occurrence rate. Can be lowered to improve yield.

In addition, the method of manufacturing the liquid crystal display according to the exemplary embodiment of the present invention can efficiently manufacture such a liquid crystal display.

Claims (8)

A liquid crystal display panel in which a plurality of pad parts are formed at an outer side, and signal lines are arranged on the pad part; A first alignment key formed on one side or both sides of the pad part, the first alignment key including a plurality of graduations arranged at first intervals; A tape wiring board having output channels connected to the signal lines of the liquid crystal display panel, and having a driving integrated circuit configured to supply a driving signal to the liquid crystal display panel through the output channels; And And a second alignment key formed on one side or both sides of the tape wiring board so as to correspond to the first alignment key, and having a plurality of graduations arranged at a second interval. The method of claim 1, The first interval is formed to have a value greater than the second interval, and the first alignment key is a reference scale that is the center of a plurality of graduations arranged at the first interval. And an interval shifted from each scale of the second align key increases as the scale moves away from the center to the left and right in a state consistent with the scale. The method of claim 2, And the interval at which each scale of the first align key is shifted from each scale of the second align key increases by a predetermined value as the distance from the center to the left and right of the reference scale. The method of claim 1, The tape wiring board, And a tape carrier package (TCP) or a chip on film (COF). Forming a plurality of pad parts on the outside of the liquid crystal display panel, and forming signal lines on the pad parts; Forming a first alignment key including a plurality of graduations arranged at one interval on one or both sides of the pad part; Forming output channels corresponding to the signal lines on a tape wiring substrate; Forming a second alignment key composed of a plurality of graduations arranged at one or both sides of the tape wiring board at second intervals; And And attaching the tape wiring substrate to the liquid crystal display panel to connect the signal lines and the output channels, respectively. The method of claim 5, The first interval is formed to have a value greater than the second interval, and the first alignment key is a reference scale that is the center of a plurality of graduations arranged at the first interval. And the interval shifted from each scale of the second alignment key increases as the scale moves away from the center to the left and right in a state consistent with the scale. The method of claim 6, The interval between the respective graduations of the first alignment key shifted from each of the graduations of the second alignment key increases by a predetermined value as the distance from the center to the left and right from the center reference grid increases. Way. The method of claim 5, The tape wiring board, And a tape carrier package (TCP) or a chip on film (COF).

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