KR20060021559A - Liquid Crystal Display for Protection of Driving Integrated Circuit Chip - Google Patents

Abstract

The present invention relates to a liquid crystal display device for protecting a driving integrated circuit chip. To this end, the liquid crystal display according to the present invention includes a liquid crystal display panel including a liquid crystal display panel for displaying an image and a tab IC mounted with a driving integrated circuit chip connected to the liquid crystal display panel to transfer driving signals to the liquid crystal display panel. A panel assembly, a backlight assembly for supplying light to the liquid crystal display panel, and a printed circuit board disposed opposite the liquid crystal display panel assembly with the backlight assembly interposed therebetween and connected to the tab IC. Here, the tab IC is bent and wrapped around the side of the backlight assembly is connected to the printed circuit board, the elastic member is formed between the driving integrated circuit chip and the backlight assembly. According to the present invention, when an external impact is applied to the liquid crystal display, the driving integrated circuit chip may be protected from the external impact.

Driving integrated circuit chip, COF, impact, elastic member

Description

Liquid crystal display for driving integrated circuit chip protection {A LIQUID CRYSTAL DISPLAY FOR PROTECTING A DRIVE INTEGRATED CIRCUIT}

1 is an exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

2 is another exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

4 is a cross-sectional view taken along line AA of FIG. 3.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display for protecting a drive integrated circuit (IC) chip, and more particularly, to a liquid crystal for protecting a driving integrated circuit chip attached to a tap IC (integrated circuit). It relates to a display device.

With the recent rapid development of semiconductor technology, the demand for liquid crystal display devices having improved performance while being smaller and lighter is exploding.

Recently, liquid crystal displays (LCDs), which have been in the spotlight, have advantages such as miniaturization, light weight, and low power consumption, and as an alternative means to overcome the disadvantages of the conventional cathode ray tube (CRT). It has been attracting attention gradually and is currently used in almost all information processing devices that require a display device.

A general liquid crystal display device applies voltage to a specific molecular array of a liquid crystal to convert it into another molecular array, and visually changes optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell emitted by the molecular array. It is a light-receiving display device which converts into a change and displays information using the modulation of the light by a liquid crystal cell.

The liquid crystal display device includes a printed circuit board for supplying a driving signal to the liquid crystal display panel. In general, the liquid crystal display device has a printed circuit board installed on the rear surface of the liquid crystal display to minimize its volume. As such, the printed circuit board is installed on the rear side of the liquid crystal display device, whereas the liquid crystal display panel is located on the front side of the liquid crystal display device, so a flexible printed circuit board (FPC) is required to interconnect them. .

By using such a flexible circuit board, it is possible to connect the printed circuit board and the liquid crystal display panel while minimizing the volume of the liquid crystal display device. In recent years, a tap IC having a drive IC chip mounted on the flexible circuit board ( Tap ICs and tap integrated circuits have been developed and used. Here, since the tab IC is bent along the inner side of the liquid crystal display, the driving integrated circuit chip mounted on the tab IC is also typically located on the inner side of the liquid crystal display, and the outside is covered with a top chassis. have. Due to this structural weakness, the impact is applied from the outside of the liquid crystal display, and when there is almost no margin between the top chassis and the tap IC, the impact is immediately applied to the tab IC, thereby deteriorating the driving of the liquid crystal display. There is this.

In particular, in the case of COF (chip on film), which has been widely used as a tap IC in recent years, the bending degree of the film is relatively large due to the bending structure, so that the margin of the top chassis is insufficient and the driving integrated circuit chip is caused by external impact. There is this fragile issue.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid crystal display device having a structure in which the driving integrated circuit chip is not damaged during external impact.

According to an aspect of the present invention, there is provided a liquid crystal display device including: a liquid crystal display panel displaying an image; and a drive integrated circuit chip connected to the liquid crystal display panel to transmit a driving signal to the liquid crystal display panel. , a liquid crystal display panel assembly including a tap IC mounted with a drive IC chip, a backlight assembly for supplying light to the liquid crystal display panel, and a backlight assembly opposite the liquid crystal display panel assembly. It includes a printed circuit board (PCB) installed at and connected to the tap IC. Here, the tab IC is bent while wrapping the side of the backlight assembly and connected to the printed circuit board, and an elastic member is formed between the driving integrated circuit chip and the backlight assembly.                     

In addition, the liquid crystal display device according to the present invention, a liquid crystal display panel assembly including a liquid crystal display panel for displaying an image and a tab integrated circuit IC connected to the liquid crystal display panel and a driving integrated circuit chip for transmitting a driving signal to the liquid crystal display panel, liquid crystal display A backlight assembly for supplying light to the panel, a mold frame for receiving the backlight assembly, and a printed circuit board mounted across the liquid crystal display panel assembly with the backlight assembly interposed therebetween and connected to the tab IC. Here, the tab IC is bent and wrapped around the side of the mold frame is connected to the printed circuit board, the elastic member is formed between the driving integrated circuit chip and the mold frame.

The elastic member may be formed to be adjacent to the driving integrated circuit chip.

The area of the elastic member is preferably equal to or larger than the area of the driving integrated circuit chip.

The elastic member may be made of rubber.

And the tap IC may be TCP or COF.

In the liquid crystal display device according to the present invention, it is preferable that a guide member for guide fixing the tab IC to the side of the mold frame is formed.

Here, the guide member may guide fix the tab IC on both sides of the tab IC.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. These embodiments of the present invention are merely for illustrating the present invention, but the present invention is not limited thereto.

FIG. 1 is an exploded perspective view of a liquid crystal display device 100 according to an exemplary embodiment of the present invention. The liquid crystal display device 100 having an elastic member 101 formed on a side surface of a lower mold frame 10 is shown. Indicates. The structure of the liquid crystal display shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the present invention can also be applied to liquid crystal display devices having other structures.

The liquid crystal display device 100 according to the exemplary embodiment of the present invention illustrated in FIG. 1 includes a backlight assembly 70 that supplies light and a liquid crystal display panel assembly 40 that displays an image corresponding to the light. . In addition, a top chassis 60, an upper mold frame 62, a bottom chassis 64, and a lower mold frame 10 are combined to fix and support them. . The mold frames 62 and 10 consist of an upper mold frame 62 and a lower mold frame 10.

The backlight assembly 70 supplies light to the liquid crystal display panel assembly 40 and guides the light to improve brightness, and the liquid crystal display panel assembly 40 positioned on the backlight assembly 70 displays an image. Control panel 50.

The liquid crystal display panel assembly 40 includes a liquid crystal display panel 50, a tap integrated circuit 44, and a PCB 42. The liquid crystal display panel 50 includes a TFT substrate 51 composed of a plurality of TFTs (thin film transistors), a color filter substrate 53 positioned on the TFT substrate 51, and a liquid crystal (injected therebetween). Not shown). Polarizers (not shown) are attached to the upper portion of the color filter substrate 53 and the lower portion of the TFT substrate 51 to linearly polarize the visible light supplied from the backlight assembly 70.

The TFT substrate 51 is a transparent glass substrate on which a matrix thin film transistor is formed, a data line is connected to a source terminal, and a gate line is connected to a gate terminal. In the drain terminal, a pixel electrode made of transparent indium tin oxide (ITO) as a conductive material is formed.

When an electrical signal is input from the PCB 42 to the data line and the gate line of the liquid crystal display panel 50 described above, an electrical signal is input to the source terminal and the gate terminal of the TFT, and according to the input of these electrical signals, the TFT Is turned on or turned off, and an electrical signal necessary for pixel formation is output to the drain terminal.

On the other hand, the color filter substrate 53 is disposed thereon opposite the TFT substrate 51. The color filter substrate 53 is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process, and a common electrode made of ITO is coated on the entire surface thereof. When power is applied to the gate terminal and the source terminal of the TFT and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter substrate. By this electric field, the arrangement angle of the liquid crystal injected between the TFT substrate 51 and the color filter substrate 53 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel.

In order to control the alignment angles of the liquid crystals and the timing at which the liquid crystals are arranged in the liquid crystal display panel 50, a driving signal and a timing signal are applied to the gate line and the data line of the TFT. In order to do this, the tab IC 44 is attached.

A printed circuit board (PCB) 42 for receiving an image signal from the outside of the liquid crystal display panel 50 and applying a driving signal to the data line and the gate line, respectively, is attached to the liquid crystal display panel 50. The tap IC 44 is connected. The PCB 42 generates a data signal for driving the liquid crystal display device 100, a gate driving signal, and a plurality of driving signals for applying these signals at an appropriate time, thereby converting the gate driving signal and the data driving signal into a tap IC ( 44 is applied to the gate line and the data line of the liquid crystal display panel 50, respectively. The driving integrated circuit chip 441 is mounted on the tab IC 44 to supply driving signals to the liquid crystal display panel 50. In order to prevent the driving integrated circuit chip 441 shown in dotted lines in FIG. 1 from being damaged by an external impact, the driving integrated circuit chip 441 is disposed to face the inside of the liquid crystal display device 100. The tap IC 44 may use a tape carrier package (TCP) or a COF.

The backlight assembly 70 is provided below the liquid crystal display panel assembly 40 to provide uniform light to the liquid crystal display panel assembly 40.

The backlight assembly 70 is received and fixed in the bottom chassis 64, which emits light and wraps around the lamp 74 and the lamp 74 installed inside the lamp cover 76 to protect the lamp 74. A light guide plate 78 for guiding light emitted from the lamp cover 76 and the lamp 74 to the liquid crystal display panel 50, a reflective sheet 79 positioned below the light guide plate 78 to reflect light; An optical sheet 72 is provided to secure the luminance characteristic of the light from the lamp 74 and provide the light to the liquid crystal display panel 50.

On the back of the bottom chassis 64, an inverter board (not shown), which is a power supply PCB, and a signal conversion PCB (not shown) are installed. The inverter board transforms an external power supply to a constant voltage level and supplies the lamp to the lamp, and the signal conversion PCB is connected to the PCB 42 described above to convert the analog data signal into a digital data signal and provides it to the liquid crystal display panel 50. .

The top chassis 60 is formed on the liquid crystal display panel assembly 40 to prevent the liquid crystal display panel assembly 40 from being separated from the lower mold frame 10 while bending the tab IC 44 to the outside of the lower mold frame 10. ). As such, the tab IC 44 is bent to the outside of the lower mold frame 10 to fix the PCB 42 to the bottom of the bottom chassis 64. In this case, in order to fix the tab IC 44 to the side of the lower mold frame 10 more firmly, the guide member 103 for guiding the tab IC 44 to the side of the lower mold frame 10 is formed. . The guide member 103 guides the tab IC 44 on both sides of the tab IC 44. When the liquid crystal display device 100 is assembled, the elastic member 101 is formed on the side surface of the lower mold frame 10 so as to face the driving integrated circuit chip 441. 441) to prevent damage.

The elastic member 101 may use various materials having elasticity, and examples thereof include rubber. In the case of rubber, it is not only easy to obtain a material but also relatively inexpensive, so it does not have a great influence on the process cost. Therefore, by attaching rubber to the side of the lower mold frame 10 can be used as the elastic member (101).

A fixing opening 621 is formed in the upper mold frame 62 to be fitted to the fixing protrusion 105 of the lower mold frame 10, so that the upper mold frame 62 and the lower mold frame are assembled when the liquid crystal display device is assembled. 10 is firmly combined. The lower mold frame 10 receives and supports the backlight assembly 70. Although not shown in FIG. 1, a front case and a rear case are positioned at an upper portion of the top chassis 60 and a lower portion of the lower mold frame 10 to form a liquid crystal display device 100 by combining them.

2 is another exploded perspective view of a liquid crystal display according to an exemplary embodiment of the present invention. Among the internal parts of the liquid crystal display 100 shown in FIG. Indicates.

As shown in FIG. 2, the tab IC 44 is bent and wrapped around the side of the backlight assembly housed in the lower mold frame 10 and connected to the printed circuit board 42 (shown in FIG. 1) located below. do. More specifically, the tab IC 44 is bent and wrapped around the lower mold frame 10 and connected to the printed circuit board. Since the tab IC 44 is bent, the printed circuit board is positioned opposite the liquid crystal display panel assembly 40, that is, on the rear surface of the liquid crystal display device 100 with the backlight assembly interposed therebetween.

3 is a perspective view illustrating a liquid crystal display device 100 according to an embodiment of the present invention, in which internal components of the liquid crystal display device 100 shown in FIGS. 1 and 2 are combined.

As shown in FIG. 3, since the tab IC 44 (dotted line) is located directly inside the top chassis 60, a driving integrated circuit mounted on the tab IC 44 in the fundamental structure of the liquid crystal display device 100. Chip 441 is vulnerable to external shock. Therefore, in order to protect the driving integrated circuit chip 441 from external impact, the driving integrated circuit chip 441 is disposed to face the side of the backlight assembly and an elastic member is disposed between the driving integrated circuit chip 441 and the backlight assembly. Form. Through the double protection structure, even when an external impact is applied, the elastic member buffers to some extent, thereby preventing malfunction of the liquid crystal display due to damage of the driving integrated circuit chip 441.

FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 and schematically illustrates an arrangement relationship between the driving integrated circuit chip 441 and the elastic member 101.

As shown in FIG. 4, since the elastic member 101 is positioned between the driving integrated circuit chip 441 and the backlight assembly 70, the impact is applied to the driving integrated circuit chip 441 from the outside. It plays a role. In particular, the area of the elastic member 101 is preferably equal to or larger than the area of the driving integrated circuit chip 441. That is, since the area of the elastic member 101 facing the drive integrated circuit chip 441 is equal to or larger than the area of the drive integrated circuit chip 441 facing the elastic member 101, the cross-sectional area of the elastic member 101 is relatively higher. Even if the position of the driving integrated circuit chip 441 is changed by the flow, it is possible to cope flexibly.

In some cases, as shown in FIG. 4, the elastic member 101 may be formed adjacent to the driving integrated circuit chip 441. In this case, the driving integrated circuit chip 441 may also be formed due to the elastic member 101. ) Is less likely to be damaged by external shocks.

As described above, in the liquid crystal display according to the present invention, since the elastic member is formed between the driving integrated circuit chip and the backlight assembly, the driving integrated circuit chip can be protected from an external impact.

Similarly, since the elastic member is formed between the driving integrated circuit chip and the mold frame, the driving integrated circuit chip can be protected from external shock.                     

Since the elastic member is formed to be adjacent to the driving integrated circuit chip, the driving integrated circuit chip is less likely to be damaged by an external impact.

Since the area of the elastic member is greater than the area of the driving integrated circuit chip, the elastic member may continuously protect the driving integrated circuit chip even if its position changes.

Since the elastic member is made of rubber, it is easy to obtain a material and has an advantage of low cost.

The tap IC can be either TCP or COF, allowing for universal application.

A guide member for guiding and fixing the tab IC is formed on the side of the mold frame to prevent the flow of the tab IC.

In addition, the guide member guides the tab IC on both sides of the tab IC, so that the tab IC can be more firmly fixed.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

Claims (8)

A liquid crystal display panel displaying an image and a tap IC connected to the liquid crystal display panel and mounted with a drive integrated circuit chip (drive IC chip) for transmitting a driving signal to the liquid crystal display panel. Liquid crystal display panel assembly, A backlight assembly supplying light to the liquid crystal display panel; A printed circuit board (PCB) installed opposite the liquid crystal display panel assembly with the backlight assembly interposed therebetween and connected to the tab IC; Including, And the tab IC is bent and wrapped around a side of the backlight assembly to be connected to the printed circuit board, and an elastic member is formed between the driving integrated circuit chip and the backlight assembly. A liquid crystal display panel assembly including a liquid crystal display panel displaying an image and a tab IC mounted on a driving integrated circuit chip connected to the liquid crystal display panel to transmit a driving signal to the liquid crystal display panel; A backlight assembly supplying light to the liquid crystal display panel; A mold frame for receiving the backlight assembly, and A printed circuit board disposed opposite the liquid crystal display panel assembly with the backlight assembly interposed therebetween and connected to the tab IC; Including, And the tab IC is bent and wrapped around a side of the mold frame and connected to the printed circuit board, and an elastic member is formed between the driving integrated circuit chip and the mold frame. The method of claim 1 or 2, And the elastic member is adjacent to the driving integrated circuit chip. The method of claim 1 or 2, And an area of the elastic member is greater than an area of the driving integrated circuit chip. The method of claim 1 or 2, The elastic member is a liquid crystal display device made of rubber. The method of claim 1 or 2, The tap IC may be a tape carrier package (TCP) or a chip on film (COF). In claim 2, And a guide member for guiding the tab IC on the side of the mold frame. In claim 7, And the guide member guides and fixes the tab IC on both sides of the tab IC.

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