KR100760928B1 - Large Size Liquid Crystal Display Device and Fabricating Method Thereof - Google Patents

Abstract

The present invention relates to a large-area liquid crystal display device and a method of manufacturing the same that can reduce the manufacturing cost by forming the pad side by side up and down.

The large-area liquid crystal display device of the present invention includes a liquid crystal panel including two pad portions facing each other with an effective display portion therebetween, and at least two liquid crystal panels having the same shape are formed side by side.

According to the present invention, there is an advantage that can reduce the manufacturing cost when manufacturing the liquid crystal display.

Description

Large Size Liquid Crystal Display Device and Fabricating Method Thereof}

1 is a perspective view showing a large-area liquid crystal display device of the conventional four-tiling method.

2 is a longitudinal cross-sectional view taken along the line AA ′ of FIG. 1;

3 and 4 are cross-sectional views illustrating a process of connecting the liquid crystal display panel according to the embodiment of FIG. 1.

5 is a plan view showing a large area liquid crystal display device formed by the embodiment of FIG.

6 is a plan view showing a conventional liquid crystal injection process.

7 is a perspective view showing a large-area liquid crystal display device of the conventional two-tiling method.

FIG. 8 is a plan view showing a large area liquid crystal display device formed by the embodiment of FIG.

9 is a perspective view showing a large area liquid crystal display device according to an embodiment of the present invention.

10 is a longitudinal cross-sectional view taken along the line BB ′ of FIG. 9;
11 and 12 are cross-sectional views illustrating a connection process of a liquid crystal display panel according to an exemplary embodiment of the present invention.
13 is a plan view showing a large area liquid crystal display device formed by the embodiment of FIG.
14 and 15 are a plan view showing a liquid crystal injection process according to the present invention.

delete

delete

delete

<Description of Symbols for Main Parts of Drawings>

6,40,54: Upper plate 8,42,56: Lower plate

10,16,58,64: sealant 12,60: liquid crystal

14,62: contact surface 22,44,66: pad portion

24, 26, 28, 30, 46, 48, 68, 70, 72: liquid crystal panel

32,74,76: liquid crystal inlet 78: liquid crystal inlet

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a large area liquid crystal display device and a method of manufacturing the same, which can reduce manufacturing costs by forming pads side by side up and down.

The liquid crystal display device includes a lower plate, an upper plate, and liquid crystals injected into a space formed by bonding the lower plate and the upper plate together.

The lower plate is a thin film transistor array and driving circuit composed of a pixel element and a switching element composed of a thin film transistor composed of a gate electrode, a gate insulating film, an active layer, an ohmic contact layer, a source and a drain electrode on a transparent substrate. Is formed. The top plate is formed with a black matrix used as a color filter and a light shielding layer on the transparent substrate.

The liquid crystal display device described above is difficult to manufacture a large area panel due to the limitations of the equipment in the process. In addition, since a large area liquid crystal display device delays signals during operation due to an increase in wiring length, the screen is distorted. Therefore, a large area liquid crystal display device is connected by connecting a plurality of small area panels.

1 is a perspective view showing a large-area liquid crystal display device of the conventional four-tiling method.

Referring to FIG. 1, the conventional 4 tiling large area liquid crystal display includes four liquid crystal panels including an upper plate 6 and a lower plate 8. The upper plate 6 is formed of a color filter and a black matrix as a light blocking layer on the transparent substrate, and the lower plate 8 is formed of a thin film transistor array and a driving circuit on the transparent substrate.

2 is a longitudinal cross-sectional view taken along the line AA ′ of FIG. 1.

Referring to FIG. 2, in the conventional liquid crystal panel, the lower plate 8 and the upper plate 6 are bonded by the sealant 10 to have an inner space, and the liquid crystal 12 is injected into the inner space. The lower plate 8 on which the thin film transistor array and the driving circuit are formed, and the upper plate 6 on which the color filter and the black matrix are formed are bonded by the sealant 10. As the sealant 10, a thermosetting resin is used. After the upper plate 6 and the lower plate 8 are bonded by the sealant 10, the contact surface 14 in contact with the panel is thinned by grinding or cutting the sealant 10 as shown in FIG. 3. do. After the contact surface 14 is thinned, the panel is connected to the panel using the sealant 16 including the black pigment as shown in FIG. 4. At this time, the sealant 16 including the black pigment is formed within a range of ± 10% of the width of the black matrix so as not to lower the brightness of the liquid crystal display device.

5 is a plan view illustrating a large area liquid crystal display device formed by a four-tiling method.

Referring to FIG. 5, a large area liquid crystal display device formed by a four-tiling method includes a pad part 22 at which contact points of a gate line and a data line of a thin film transistor are formed, and a contact surface 14 to form one unit panel. Four liquid crystal panels 24, 26, 28, and 30 connected to each other. The pad part 22 has gate line and data line contact points connected to the gate drive IC and the data drive IC. In the four tiling schemes, two thin film transistor masks and four color filters are required. This is described in detail as follows. Since the first and third liquid crystal panels 24 and 28 are symmetric in diagonal directions, when the third liquid crystal panel 28 is rotated, the first and third liquid crystal panels 24 and 28 become the same shape, and thus the same thin film transistor mask. Can be used. However, when the third liquid crystal panel 28 is rotated, the arrangement of the photosensitive material of the color filter is changed. The photosensitive material arrangement of the first liquid crystal panel 24 color filter is red (R), green (G), and blue (B), but the photosensitive material arrangement of the third liquid crystal panel 28 color filter is blue (B), It becomes green (G) and red (R) and cannot use the same color filter. That is, one thin film transistor mask and two color filters are used for the first and third liquid crystal panels 24. In the case of the second and fourth liquid crystal panels 26 and 30, one thin film transistor mask and two color filters are used. Therefore, a large-area liquid crystal display formed by four tiling methods requires two thin film transistor masks and four color filters.

6 is a plan view illustrating a dipping method of injecting liquid crystal into one liquid crystal panel illustrated in FIG. 5.

Referring to FIG. 6, a liquid crystal injection hole 32 into which a liquid crystal 12 is injected, and a pad portion 22 having a contact point between a gate line and a data line of a thin film transistor are formed. The pad part 22 is provided with a gate line and a data line contact point for connecting to a gate drive IC and a data drive IC. The liquid crystal 12 is injected through the liquid crystal injection hole 32 formed in the liquid crystal panel. After the liquid crystal 12 is injected into the liquid crystal injection hole 32 and the liquid crystal injection hole 32 is sealed with UV curable resin, the liquid crystal injection is completed.

7 is a perspective view showing a large-area liquid crystal display device of the conventional two-tiling method.

Referring to FIG. 7, the conventional two-tiling large area liquid crystal display includes two liquid crystal panels including an upper plate 40 and a lower plate 42. The upper plate 40 is formed of a black matrix that serves as a color filter and a light shielding layer on the transparent substrate, and the lower plate 42 is formed of a thin film transistor array and a driving circuit on the transparent substrate. The 2 tiling liquid crystal panel is larger in size than the 4 tiling liquid crystal panel and many pixel cells are formed. Since the other panel connection method and the liquid crystal injection method is the same, it will be omitted.

8 is a plan view illustrating a large area liquid crystal display device formed by two tiling schemes.

Referring to FIG. 8, a large area liquid crystal display formed by a two-tiling method includes a pad part 44 having contact points between a gate line and a data line of a thin film transistor, and two contact surfaces connected to form one unit panel. Liquid crystal panels 46 and 48 are provided. The pad part 44 is provided with a gate line and a data line contact point for connecting the gate drive IC and the data drive IC. In the two tiling method, since the first and second liquid crystal panels 46 and 48 are symmetrically left and right, two thin film transistor masks and two color filters are required.

Such a large area method of the conventional liquid crystal display device has a disadvantage in that manufacturing cost increases because two or more thin film transistor masks and two or more color filters are used.

Accordingly, an object of the present invention is to provide a large-area liquid crystal display device and a method of manufacturing the same that can reduce the manufacturing cost.

In order to achieve the above object, the large-area liquid crystal display device of the present invention includes a liquid crystal panel including two pad portions facing each other with an effective display portion therebetween, and at least two liquid crystal panels having the same shape are formed side by side. It is characterized by.
In the manufacturing method of the large-area liquid crystal display device of the present invention, at least two liquid crystal panels are connected to each other, and the forming of the at least two liquid crystal panels is performed on the same substrate on the first substrate through a mask of the same first group. Forming a pad portion for connecting the thin film transistor array and the electrode line of the thin film transistor array to a driver driver integrated circuit; Forming a color filter of the same arrangement on a second substrate bonded to the first substrate through a mask of the same second group, wherein the pad part is disposed between the effective display part on which the thin film transistor array is formed; It is formed to face.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 9 to 15.

9 is a perspective view illustrating a large area liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the large-area liquid crystal display according to the embodiment of the present invention includes three liquid crystal panels including an upper plate 54 and a lower plate 56. The upper plate 54 is formed of a black matrix, which is a color filter and a light shielding layer, on the transparent substrate, and the lower plate 56 is formed of a thin film transistor array and a driving circuit on the transparent substrate.

10 is a longitudinal cross-sectional view taken along the line BB ′ of FIG. 9.

Referring to FIG. 10, in the conventional liquid crystal panel, the lower plate 56 and the upper plate 54 are bonded by the sealant 58 to have an inner space, and the liquid crystal 60 is injected into the inner space. The lower plate 56 on which the thin film transistor array and the driving circuit are formed, and the upper plate 54 on which the color filter and the black matrix are formed are bonded by the sealant 58. As the sealant 58, a thermosetting resin is used. After the upper plate 54 and the lower plate 56 are bonded by the sealant 58, the contact surface 62 where the panel is in contact with the panel by grinding or cutting the sealant 58 as shown in FIG. 11 is thinned. do. After the contact surface 62 is thinned, the panel is connected to the panel using the sealant 64 including the black pigment as shown in FIG. 12. At this time, the sealant 64 including the black pigment is formed within a range of ± 10% of the width of the black matrix so as not to lower the brightness of the liquid crystal display device.

13 is a plan view showing a large area liquid crystal display device formed by an embodiment of the present invention.

Referring to FIG. 13, a large-area liquid crystal display device according to an exemplary embodiment of the present invention includes a pad portion 66 at which contact points of a gate line and a data line of a thin film transistor are formed, and a contact surface for forming one unit panel. Three liquid crystal panels 68, 70, and 72 connected to each other are provided. The pad portion 66 is provided with gate line and data line contact points connected to the gate drive IC and the data drive IC. In the present invention, the pad portion 66 formed on the liquid crystal panel is formed side by side up and down. That is, since all the liquid crystal panels 68, 70, and 72 are formed in the same shape (that is, the thin film transistor array and the color filter of the same arrangement), the same thin film is used to manufacture the respective liquid crystal panels 68, 70, and 72. Transistor masks and color filters are used. In addition, a large area liquid crystal display device may be realized by connecting a plurality of panels.

14 and 15 illustrate a liquid crystal injection method according to an embodiment of the present invention.

Referring to FIG. 14, a liquid crystal injection hole 74 into which a liquid crystal 60 is injected, and a pad portion 66 having a contact point between a gate line and a data line of a thin film transistor are formed. The liquid crystal 60 is injected into the liquid crystal inlet 74 from a liquid crystal supply unit (not shown). After the liquid crystal 60 is injected into the liquid crystal inlet 74, the liquid crystal inlet 60 is sealed by UV curing resin.

Referring to FIG. 15, the liquid crystal inlet 76 into which the liquid crystal 60 is injected, the liquid crystal inlet 78 to suck the liquid crystal 60 injected by the liquid crystal inlet 76, and gate lines and data of the thin film transistors. A pad portion 66 is shown in which contact points of the lines are formed. The liquid crystal 60 is injected into the liquid crystal inlet 76 from a liquid crystal supply unit (not shown). When the liquid crystal 60 is injected into the liquid crystal injection hole 76, the liquid crystal suction hole 78 sucks the liquid crystal 60. When the liquid crystal 60 is discharged to the liquid crystal suction opening 78 after a predetermined time, the liquid crystal supply unit stops the injection of the liquid crystal 60. In this manner, the liquid crystal 60 can be injected into the liquid crystal panel in a short time.

As described above, according to the large-area liquid crystal display device and the manufacturing method thereof according to the present invention, since at least two or more liquid crystal panels have the same shape, that is, each liquid crystal panel has the same array of color filters and the same array of thin film transistor arrays. Since it can be manufactured using the same mask can reduce the number of masks and the number of color filters, there is an advantage that can reduce the manufacturing cost.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (5)

In a large area liquid crystal display device in which at least two liquid crystal panels are connected, Each liquid crystal panel has the same shape as each other, and includes an effective display unit in which a pixel array is formed, and two pad units facing each other with the effective display unit interposed therebetween to connect electrode lines of the pixel array to a driver driver integrated circuit. , At least two liquid crystal panels of the same shape are formed side by side, The thin film transistor array or the color filter formed on each liquid crystal panel is formed using the same mask. The method of claim 1, The pad portion comprises a gate pad portion connected to a gate line; And a data pad part disposed symmetrically with the gate pad part and connected to the data line. delete In forming a unit panel in which at least two liquid crystal panels are connected, Forming the at least two liquid crystal panel is Forming a thin film transistor array and a pad portion for connecting the thin film transistor array of the same array and the electrode line of the thin film transistor array to a driver driver integrated circuit on a first substrate through a mask of the same first group; Forming a color filter of the same arrangement on a second substrate bonded to face the first substrate through a same second group of masks, The at least two liquid crystal panels are formed in the same shape with each other, And the pad portion is formed to face the effective display portion on which the thin film transistor array is formed. The method of claim 4, wherein The pad portion comprises a gate pad portion connected to a gate line; And a data pad portion disposed symmetrically with the gate pad portion and connected to a data line.

Images