KR20090080404A - Liquid crystal display having multiple seal line and black matrix - Google Patents

Abstract

A liquid crystal display device having a multi-seal line and a black matrix is provided to reduce the bezel width of a backlight unit by remarkably reducing the widths of a seal line of an edge part and the black matrix. A seal is coated on an external line(71) and one or more cross lines(73) on a substrate. The external line is formed along the outside of the TFT substrate. The cross lines are formed as crossing a screen. A black matrix(75) is formed on the external line and cross lines correspondingly to the lines on which the seal is coated at a lower surface of a color filter(70). A plurality of split screens(90) are generated by the black matrix formed in the cross lines.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display having multiple seal lines and a black matrix,

The present invention relates to a liquid crystal display having multiple silanes and black matrices, and more particularly to a liquid crystal display having multiple silylines and black matrices, and more particularly, by forming multiple solid lines and black matrices across a screen, a black matrix area of an outline line is minimized, It enables the slim design of the LCD. In spite of the narrow BM, it improves the bonding of the TFT substrate and the color filter by the multiple seal lines to prevent the warping of the panel and to prevent the peeling phenomenon between the TFT substrate and the color filter And more particularly to a liquid crystal display device having a multi-room line and a black matrix which drastically reduce the generation rate of defective products.

Generally, in a liquid crystal display (LCD), when a predetermined voltage is applied to a TFT formed on a TFT (Thin Film Transistor) substrate, the arrangement of the liquid crystal sealed between the TFT substrate and the color filter is changed, Is a display means in which the optical characteristics of light are changed to output a color image while passing through the color filter.

1 shows a stacked structure of a general LCD. The LCD has a structure in which a BLU (Back Light Unit) 10, a TFT substrate 20, and a color filter 30 are laminated in a chassis not shown. Since the LCD itself does not emit light, the BLU 10 is required as a light source for ensuring visibility. The TFT substrate 20 is provided with a TFT, a capacitor for a charge axis, a gate line wiring, a source line wiring, and the like, and is joined by a color filter 30 and a seal 25, and liquid crystal is sealed in the TFT substrate 20. The color filter 30 is used for colorizing an image. The color filter 30 is manufactured by depositing RGB photoresist on a glass substrate, and a linear film or the like is attached. On the other hand, optical means such as a polarizing plate attached to the lower portion of the TFT substrate 20 and the upper portion of the color filter 30 are not illustrated.

At this time, a seal 25 is applied along the outer area of the TFT substrate 20 as shown in FIG. 2, and the TFT substrate 20 and the color filter 30 are bonded by the seal 25. A drive IC for driving the panel is mounted outside the line to which the seal 25 is applied. A source IC 23 is mounted on the lower edge 22 of the TFT substrate 20 and gate ICs 27 are provided on both side edge portions 26 or one side edge portion 26 of the TFT substrate 20. [ Is mounted. 2, reference numeral 29 denotes a liquid crystal injection hole.

3, a black matrix (BM), which is a video non-display area, is formed on the outer periphery of the lower surface of the color filter 30 in correspondence with the line to which the thread 25 is applied to hide the area of the thread 25. [ , 35 are printed. Further, a V_com line 31 is formed on the upper surface of the TFT substrate 20 adjacent to or overlapped with the line of the seal 25. The V_com line 31 is a line for applying a reference voltage to the TFT substrate 20 side, and the position relative to the thread 25 line varies depending on the design specification of the LCD maker. For example, when the gate IC 27 is mounted in the form of a chip on glass (COG) or a chip on film (COF) as shown in FIG. 2, the gate IC 27 is mounted only on one side edge portion 26, A V_com line 31 is formed in the edge portion 26. If a gate circuit is printed in the form of an amorphous silicon gate circuit (ASG) on the glass of the TFT substrate 20, the V_com line 31 may be formed adjacent to the ASG.

On the other hand, recently, LCDs are becoming larger and larger. For example, in recent years, 46-inch LCDs are becoming increasingly popular, and the scale-up of such LCDs will gradually accelerate. As the LCD becomes larger, stronger adhesion between the TFT substrate 20 and the color filter 30 is required. Accordingly, it is inevitable that the width of the yarn 25 is widened, which causes the increase of the width of the BM 35, resulting in an increase in the image non-display area at the periphery of the LCD.

As the BM width of the LCD outline increases, the width of the bezel outside the LCD increases. Thus, in a so-called " Tiled " display device in which a large number of LCDs are combined in a matrix form, the width of the contact portion between the LCDs is widened, leading to a problem that the continuity of the screen is deteriorated.

In order to solve such a problem, if the actual width of the LCD outline is narrowed, the bonding force between the TFT substrate 20 and the color filter 30 is lowered and the peeling phenomenon between the two panels occurs, This leads to a decline in product competitiveness.

Further, in the above-described conventional LCD, since the V_com line 31 is formed only on the side edge portion 26 of the screen, the short point of the V-com line 31 is formed locally at some point. As a result, the contact resistance is increased at a point far from the short point, which causes a distortion phenomenon and a deterioration in image quality.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a color filter in which a solid bonding region between a TFT substrate and a color filter is secured by forming multiple real regions and BM across a screen, , The bezel width of the exterior components such as the BLU can be slimly designed, and in the tiled display device combining a plurality of LCDs, the multi-room line and the black matrix And an object of the present invention is to provide a liquid crystal display device.

In addition, the present invention can be realized by mounting a gate IC on a BM formed across a screen and eliminating the gate IC mounting portions on both sides of the conventional panel, thereby reducing the image non-display area of the screen outline to a minimum, Another object of the present invention is to provide a liquid crystal display device having a matrix.

The present invention also provides a liquid crystal display having a plurality of room lines and a plurality of black lines, each of which has a plurality of black lines and a plurality of black lines, There is another purpose in providing the device.

In order to achieve the above object, the present invention provides a liquid crystal display device having a multi-seal line and a black matrix, which includes a backlight unit, a TFT substrate, and a color filter, A thread 55 is coated on the upper surface of the TFT substrate 50 to an outer line 51 formed along the outer periphery of the TFT substrate 50 and at least one cross line 53 formed across the screen A black matrix 75 is formed on a lower surface of the color filter 70 in correspondence with a line to which the seal 55 is applied and on at least one cross line 73 and at least one cross line 73, And a plurality of divided screens 90 are formed by the black matrix 75 formed on the display panel 73.

The present invention may have various embodiments. In one embodiment, at least one of the chambers 55 of the chambers 55 applied to the cross line 53 is not connected to the outer line 51. That is, the line 55 formed in the cross line 53 is sufficient to reinforce the adhesive force between the TFT substrate 50 and the color filter 70, and the line 55 and the outline line 51 of the cross line 53, It is not necessary that the chambers 55 of the respective chambers are connected.

In another embodiment, at least one of the chambers 55 of the chambers 55 applied to the cross line 53 may be connected to the outer line 51. In this case, the adhesive strength between the TFT substrate 50 and the color filter 70 can be further strengthened. In particular, the adhesion between the seal 55 of the cross line 53 and the seal 55 of the outer line 51 Of the V-com line 58 between the TFT substrate 50 and the color filter 70 by forming the short point 59 of the V_com lines 57 in the V_com line 57 by increasing the junction area of the V_com line 57. [ The resistance can be reduced.

The black matrix 75 formed on the vertical cross line 73 or the black matrix 75 formed on the vertical cross line 71 is provided with the black matrix 75 on each black matrix 75 An ASG 93 for applying a gate signal to the gate line 91 formed on the divided screen 90 is mounted. That is, by mounting the ASG 93 in the area of the black matrix 75 formed in the cross line 73, the ASG 93 mounting area in the area of the black matrix 75 formed on the outer line 71 can be reduced, Enabling a slim design according to narrow BM. The narrow BM can be implemented more effectively by mounting the ASG 93 only on the cross line 73 and removing the ASG 93 on the area of the black matrix 75 formed on the outer line 71.

A gate line for applying a gate signal to a gate line 91 formed on both side split screens 90 in contact with the black matrix 75 is formed in a region of the black matrix 75 formed on the cross line 73 in the vertical direction, The IC 77 is mounted. As a result, it is not necessary to mount the gate IC 77 on both side edge portions of the TFT substrate 50, and consequently, a narrow BM can be realized.

According to the embodiment of the present invention, the divided screens 90 divided by the black matrix 75 formed on the cross line 73 are mounted on the source IC 79 driven by individual data and data clock, do. Accordingly, the divided screens 90 operate as individual displays outputting individual images. As a result, it is possible to reproduce dual or multiple independent display screens as a single display device.

As another embodiment, the divided screens 90 divided by the black matrix 75 formed on the cross line 73 are mounted with the source IC 79 driven by the same data and data clock. Accordingly, the divided screens 90 operate as a single display outputting a single continuous image. This facilitates the acceleration of the large LCD and may replace a multi-screen device of the Tiled type, which conventionally combines a plurality of discrete display devices. Partitioning of a plurality of screens in a single device, compared to combining a plurality of display devices, will lead to control and integration of the video signal and simplification of the driving device.

According to the liquid crystal display device having a multiple seal line and a black matrix of the present invention, a black matrix for hiding the junction region between the TFT substrate and the color filter and the junction region is formed in the plurality of cross lines crossing the outer line and the screen , The actual line and the black matrix width of the outline line can be minimized and the bonding strength between the TFT substrate and the color filter can be improved and the product defect rate can be drastically reduced even though the width of the seal line and the black matrix of the outline line are reduced .

Further, according to the present invention, a plurality of short points of the V_com line between the TFT substrate and the color filter are formed at the actual connecting portions of the outer line and the cross line to increase the short point, thereby reducing the total contact resistance, Can be expected to improve.

According to the present invention, by alternately mounting the gate IC or the ASG mounted on both side edges of the conventional TFT substrate in the black matrix region formed in the cross line, the narrow black matrix width of the outline line can be minimized to realize a narrow BM have.

In addition, according to the present invention, it is possible to output individual images to respective divided screens divided by the black matrix formed on the cross line, and to use the divided images as a multiple display device, So that it can be used as a single display device and can be used for various purposes.

Particularly, the biggest advantage of the present invention is that the width of the outer bezel of the LCD can be minimized through the narrow BM implementation of the outline line, which minimizes the border area between the LCDs in the multi- Thereby ensuring continuity and, as a result, enhancing product competitiveness.

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

FIG. 4 is a plan view showing an example in which a seal line is formed on a TFT substrate according to an embodiment of the present invention, FIG. 5 is a plan view showing an example in which a seal line is formed on a TFT substrate according to another embodiment of the present invention, 6 is a plan view showing an example in which a BM line is formed according to an embodiment of the present invention, FIG. 7 is a plan view showing an example in which a BM line is formed according to another embodiment of the present invention, Fig.

First, a liquid crystal display device having a multiple seal line and a black matrix (hereinafter referred to as "BM") according to the present invention has a junction structure between a TFT substrate 50 and a color filter 70, A line 55 is applied to the line 51 and at least one cross line 53. An outer line 71 is formed on the lower surface of the color filter 70 in correspondence with the application line of the chamber 55 on the TFT substrate 50, And at least one cross line (73). In the following description, the term "cross line" refers to an imaginary line formed across the active area in which an actual screen is displayed on the TFT substrate 50 or the color filter 70 in the horizontal direction or the vertical direction. In other words, "cross line" means a line dividing the active area into a plurality of screens. The following description will focus on the bonding structure of the TFT substrate 50 and the color filter 70 and the area where the BM 75 is formed. The exterior components such as the BLU and the chassis are not limited to the general LCD structure Therefore, detailed description will be omitted.

4 and 5 are conceptual views of an example in which a thread 55 is applied to the upper surface of the TFT substrate 50. FIG. Referring to FIG. 5, a seal 55 is applied to the upper surface of the TFT substrate 50 and / or the lower surface of the color filter 70 as shown in FIG. After the TFT substrate 50 and the color filter 70 are fabricated, the TFT substrate 50 and the color filter 70 are cleaned after removing the foreign substances on the surface through the cleaning process and printing an alignment film, A seal 55 is applied for interfacing. At this time, the BM 75 is patterned in advance on the lower surface of the color filter 70, as will be described later, in the region to which the seal 55 is applied.

4 and 5, a seal 55 is applied to the upper surface of the TFT substrate 50 along the outer line 51 and the cross line 53. [ The region under the TFT substrate 50 is a region where the source IC 79 is to be mounted. As shown in Fig. 4, the seal 55 can be applied to divide the screen into three sections along the longitudinal cross line 53, and as shown in Fig. 5, the transverse cross line 53 The thread 55 may be applied.

The bonding force between the TFT substrate 50 and the color filter 70 can be further enhanced by applying the seal 55 to the cross line 53 as well as the outer line 51 of the TFT substrate 50. [ In addition, since the coating area of the thread 55 of the outer line 51 can be deducted by the area of the thread 55 applied to the cross line 53, a narrow BM of the outer line can be realized.

As shown, the seal 55 applied to the cross line 53 may not be connected to the outer line 51. 4, the chamber 55 of the left cross line 53 is connected to the outer line 51, but the chamber 55 of the right cross line 53 is disconnected from the outer line 51 Able to know. That is, the seal 55 can be used only for strengthening the bonding strength between the TFT substrate 50 and the color filter 70.

Preferably, however, the chamber 55 of the cross line 53 is connected to the outer line 51. The advantage of connecting the chamber 55 of the cross line 53 with the outline line is that it can increase the short point 59 of the V_com lines 57 marked with a hint line in Fig. Normally, the V_com line 57 is provided to provide a reference voltage for determining the polarity upon liquid crystal driving, and is formed in such a manner as to be close to or overlapped with a line to which the chamber 55 is applied.

When the V_com line 57 is formed only on the outer line 51 of the conventional TFT substrate 50, the short point 59 of the V_com line 57 is formed to be limited to the corner portion. However, according to the present invention, the seal 55 is applied along the cross line 53, and the V_com line 57 overlaps the seal 55 to form the short point 59 of the V_com line 57 .

With the increase of the short point 59 of the V_com line 57, reduction of the contact resistance can be expected. When the contact resistance is reduced, not only the signal distortion phenomenon can be prevented, but also the effect of improving the image quality is obviously predicted.

6 and 7 show various examples in which the ASG 93 and the gate IC 77 are mounted on the cross line 53 corresponding to the line to which the seal 55 is applied.

6, the BM 75 may be formed on two cross lines 73 in the vertical direction in addition to the BM 75 on the outer line 71 at the bottom surface of the color filter 70 have. In this case, the screen will be divided into three by two central BMs 75. The ASG 93 replacing the gate IC can be formed on the TFT substrate 50 and operated in the region of the BM 75 formed in the cross line 73 in the vertical direction.

6, the ASGs 93 for applying gate signals to the gate lines 91 formed on the left divided screen 90 among the three divided screens 90 are connected to the left outer line 71, The BM 75 area of the left cross line 73 and the BM 75 area of the left cross line 73, respectively. Likewise, the ASGs 93 for applying the gate signal to the center screen 90 and the right side screen 90 are located at the BM 75 of the both side rooms.

In addition, the ASG 93 may be provided only in the BM 75 area of the cross line 73. The blocks of the two cross lines 73 may be provided with an ASG 93 for individually driving the split screen 90 on the left side of the cross line 73 and the split screen 90 on the right side. In this case, the ASG 93 is not mounted on the BM 75 area of the outer line 71, and the BM 75 of the outer line 71 can be formed narrower.

In this embodiment, the ASG 93 is located in the BM 75 area of the outer line 71, the BM 75 area of the cross line 73, or the BM 75 area of the cross line 73 , And drives the adjacent divided screen 90. Therefore, the drive rods of the ASG 93 are dispersed, and the circuit size of each ASG 93 can be made small. In addition, the outer line 71 can be formed by excluding the ASG 93. [ Therefore, the width of the BM 75 of the outer line 71 can be greatly reduced, and a narrow BM can be realized.

7, gate ICs 77 (gate lines) for applying gate signals to the gate lines 91 of the split screen 90 on both sides are formed in the BM 75 area formed in the two cross lines 73, Can be mounted. In this case, the seal 55 is not applied to the corresponding region where the gate IC 77 is mounted, and the color filter 70 at the portion where the gate IC 77 is to be mounted through a laser scribing facility or the like And allows the gate IC 77 to be easily bonded.

As a result, the gate IC 77 is not mounted on the region of the outer line 71 adjacent to the BM 75 region. Therefore, it is sufficient that the BM 75 of the outer line 71 has only a minimum width to prevent peeling between the TFT substrate 50 and the color filter 70.

As described above, by applying the cross lines 53 and 73 of the TFT substrate 50 and the color filter 70 and applying the seal 55, the bonding force between the TFT substrate 50 and the color filter 70 is improved And the gate IC 77 or the ASG 93 is mounted thereon, it is possible to reduce the width of the line of the outer chamber 55 and the width of the BM 75. Accordingly, even when the large-screen LCD is configured, the image non-display area on the outer side of the panel is minimized, and when a plurality of LCD panels are combined to form a tiled multi-screen, the continuity of the screen can be improved at the intersection between the LCD panels .

Fig. 8 shows an example in which, in the embodiment of Fig. 7, T_con 95 controls the driving of the gate IC 77 and the source IC 79. Fig. T_con 95 is a control means for controlling the driving of the gate IC 77 and the source IC 79. The source IC 79 provides image data and a driving clock of the image to be displayed, And provides clock information capable of sequentially turning ON / OFF the gate lines 91 on the screen. As shown, T_con 95 individually applies a signal to the source IC 79 assigned to each divided screen 90. If the data clock of the left split screen 90 and the source IC 79 of the central split screen 90 are connected and the clock synchronized with the above source ICs 79 and common image data are provided, The left divided screen 90 and the central divided screen 90 will display a continuous single screen. Conversely, if the data clock and data lines of the left split screen 90 and the source IC 79 of the central split screen 90 are not interconnected and separate clock and image data are provided, 90 will be controlled as separate display devices in T_con 95.

As described above, in the liquid crystal display device having the multiple BMs of the present invention, the divided screens 90 whose areas are divided by the BM 75 of the cross line 73 can be individually controlled to operate as separate display devices have. That is, the effect of dual or multiple monitors as a single display device can be expected. Accordingly, when the resolution of the screen increases drastically in the future and the speed of the screen driving frequency is required, the frequency can be lowered due to the screen division, so that the cost reduction effect can be expected.

Further, under the control of T_con 95, each divided screen 90 can operate as a display device that outputs a single continuous image. In this case, a portion where the image is broken by the BM 75 of the cross line 73 may occur. However, in the large-screen LCD such as the electric sign board, the image disconnection phenomenon by the BM 75 of the cross line 73 is insignificant enough to be visually recognized. In particular, in a case where a plurality of display devices are combined to constitute a large screen such as a conventional electric sign board and the like, compared with the case where a substantial portion of the video non-display area exists at the contact portion of the display devices, The display device can have a merit that the phenomenon of image blindness in the cross line 73 is extremely small, because it is easy to produce a large screen.

As described above, the present invention can operate not only as a separate display device, but also as a single display device displaying a single continuous image, with the divided screens of the area divided by the multiple seal lines and the BM. Therefore, the liquid crystal display device having multiple BMs of the present invention is highly useful as a multi-monitor for a personal computer as well as a large LCD.

That is, the technical spirit of the present invention is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes may be made without departing from the technical spirit of the present invention. And will be apparent to those skilled in the art.

1 is an exploded perspective view showing a laminated structure of a general LCD;

2 is a plan view schematically showing a seal line applied to the upper surface of a conventional TFT substrate.

3 is a side view showing an example of a junction between a conventional TFT substrate and a color filter

4 is a plan view showing an example in which a seal line is formed on a TFT substrate according to an embodiment of the present invention.

5 is a plan view showing an example in which a seal line is formed on a TFT substrate according to another embodiment of the present invention.

6 is a plan view showing an example in which BM lines are formed according to an embodiment of the present invention.

7 is a plan view showing an example in which BM lines are formed according to another embodiment of the present invention.

8 is a plan view showing an example of driving and controlling a plurality of divided screens

Description of the Related Art

50: TFT substrate 51: outer line

53: cross line 55: thread

57: V_com line 59: Short point

70: Color filter 71: Outline line

73: cross line 75: black matrix

77: Gate IC 79: Source IC

90: split screen 91: gate line

93: ASG

Claims (9)

In a liquid crystal display device in which a backlight unit, a TFT substrate 50, and a color filter 70 are laminated, On the upper surface of the TFT substrate 50, a thread 55 is applied to an outer line 51 formed along the outer periphery of the TFT substrate 50 and at least one cross line 53 formed across the screen, A black matrix 75 is formed on the outer line 71 and the at least one cross line 73 corresponding to the line to which the seal 55 is applied to the lower surface of the color filter 70, 73) having a plurality of divided screens (90) by a black matrix (75) formed on the liquid crystal display panel (73). The method according to claim 1, Wherein at least one of the chambers (55) of the chambers (55) applied to the cross line (53) is not connected to the external line (51). The method according to claim 1, At least one of the chambers 55 of the chambers 55 applied to the cross line 53 is connected to the outer line 51 and the chambers 55 of the cross line 53 and the outer line 51 are connected to the cross line 53, And a short point (59) of the V_com lines (57) is formed at a point where the chambers (55) of the V_com lines (57) are connected to the liquid crystal display panel. The method according to claim 1, The area of the black matrix 75 formed on the black matrix 75 formed on the vertical line 71 and the vertical cross line 73 is formed with a gate formed on the divided screen 90 in contact with each black matrix 75, And an ASG (93) for applying a gate signal to the line (91) is mounted on the liquid crystal display panel. 5. The method of claim 4, And the ASG (93) is mounted only in a region of the black matrix (75) formed in the vertical cross line (73). The method according to claim 1, A gate IC 77 for applying a gate signal to a gate line 91 formed on both side split screens 90 in contact with the black matrix 75 is formed in a region of the black matrix 75 formed on the cross line 73 in the vertical direction And the plurality of pixel electrodes are arranged in a matrix. The method according to claim 6, Wherein a sealant (55) is applied to a region of the black matrix (75) of the cross line (73) other than a region where the gate IC (77) is mounted. The method according to claim 1, The source ICs 79 driven by the respective data and data clocks are mounted on the divided screens 90 divided by the black matrix 75 formed on the cross line 73, And each of the pixels is configured to output an individual image. The method according to claim 1, A source IC 79 driven by the same data and data clock is mounted on the divided screens 90 divided by the black matrix 75 formed on the cross line 73, And outputs the continuous image of the black matrix.

Images