KR20060078868A - A driver ic package having a new structure and a flat display device provided with the same - Google Patents

Abstract

The present invention relates to a drive IC package having a new structure and a flat panel display device having the same. The drive IC package according to the present invention includes an insulating film, a wiring formed on the insulating film, and an integrated circuit chip mounted on and connected to the insulating film. Here, the length of the side of the drive IC package parallel to the longitudinal direction of the integrated circuit chip is larger than the length of the side of the drive IC package parallel to the width direction of the integrated circuit chip.

Driver IC Package, COF, Integrated Circuit Chip, Wiring, Pitch

Description

A new IC package and a flat panel display having the same structure {A DRIVER IC PACKAGE HAVING A NEW STRUCTURE AND A FLAT DISPLAY DEVICE PROVIDED WITH THE SAME}

1 is an exploded perspective view of a flat panel display device according to an exemplary embodiment of the present invention.

2 is a perspective view illustrating a flat panel display device according to an exemplary embodiment of the present invention.

3 is a partial cross-sectional view taken along line AA of FIG. 2.

The present invention relates to a drive IC package having a new structure and a flat panel display device having the same, and more particularly, to a drive IC package having a new structure modified from a method of mounting an integrated circuit chip (IC chip) and having the same. It relates to a flat panel 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 displays information using the modulation of the light by a liquid crystal cell by converting it into a change.

A plurality of data lines and gate lines are formed on the liquid crystal display panel of the liquid crystal display device. A TFT (thin film transistor) substrate of the liquid crystal display panel is used to display an image by applying a driving voltage to the data line and the gate line. A tape carrier package (TCP) and the like are attached on the substrate, and a driving signal is transmitted through TCP connected to a printed circuit board (PCB).

While the width itself of the TCP attached to the TFT substrate is very narrow, a large number of wirings must be formed on the TCP, so that the pitch between the wirings is formed to be quite narrow. This not only increases the possibility of short circuit between wires, but also complicates the outer lead bonding (OLB) process.

In addition, in the case of the TCP used in the liquid crystal display device, since it has a certain length, the end portion protrudes toward the rear side of the liquid crystal display device. Therefore, a masking tape or the like is attached to the rear side of the liquid crystal display device in order to prevent the energization caused by contact with the outside so that the end portion of the TCP is mounted inside the liquid crystal display device. Therefore, an additional process for attaching the masking tape is required, which increases manufacturing time and increases manufacturing cost. Therefore, the necessity of mounting TCP in a liquid crystal display device by reducing the length of TCP is emerging.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide a driving IC package with a simplified structure while reducing its length.

In addition, the present invention is to provide a flat panel display device having the above-described driving IC package.

The driver IC package according to the present invention for achieving the above object is an insulating film, wiring formed on the insulating film, and integrated circuit chip (IC) mounted on the insulating film and connected to the wiring chip). Here, the length of the side of the drive IC package parallel to the longitudinal direction of the integrated circuit chip is larger than the length of the side of the drive IC package parallel to the width direction of the integrated circuit chip.

Here, the integrated circuit chips are preferably arranged side by side in the width direction of the wiring interconnected, and are mounted on a large number of insulating films.

The integrated circuit chip may include a first integrated circuit chip and a second integrated circuit chip spaced apart in the longitudinal direction, and the second integrated circuit chip may operate by receiving a control signal from the first integrated circuit chip.

The driving IC package is preferably a chip on film (COF).

The flat panel display device according to the present invention includes a flat panel display panel for displaying an image and a drive IC package for mounting an integrated circuit chip and overlapping with one edge of the flat panel display panel to apply a drive signal for driving the flat panel display panel. Include. Here, the length of the side of the driver IC package parallel to one edge of the flat panel display panel is larger than the length of the side of the drive IC package intersecting one edge of the flat panel display panel.

The flat panel display device according to the present invention further includes a top chassis for covering and fixing the edges of the flat panel display panel, wherein one end of the driver IC package includes a side end portion of the top chassis and is parallel to the flat panel display panel. It is preferred to be spaced apart from the cotton.

The flat panel display apparatus according to the present invention further includes a backlight assembly for supplying light to the flat panel display panel, wherein the flat panel display panel may be a liquid crystal display panel.

The liquid crystal display panel includes a color filter substrate, a TFT substrate facing the color filter substrate and having a plurality of thin film transistors formed thereon, and a liquid crystal injected between the color filter substrate and the TFT substrate, and the driver IC package is connected to the TFT substrate superimposed. Can be.

The driving IC package may be connected to a gate line formed on the TFT substrate to apply a driving signal to the gate line.

In the flat panel display device according to the present invention, the integrated circuit chips are arranged side by side in the width direction of the wiring and are interconnected and may be mounted on a plurality of insulating films.                     

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. 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 flat panel display device 100 according to an embodiment of the present invention, and shows a wedge type flat panel display device mainly used in a notebook or the like.

The structure of the flat panel display device 100 shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the flat panel display device 100 may be modified in other forms. In addition, although the liquid crystal display panel 50 is shown in FIG. 1 as a flat panel display panel, this is merely to illustrate the present invention, and the present invention is not limited thereto. Therefore, other light receiving flat panel display panels can be used.

The flat panel display apparatus 100 according to an exemplary embodiment of the present invention shown in FIG. 1 includes a liquid crystal display panel 50 for displaying an image and a backlight assembly 70 for supplying light thereto. The top chassis 60 is coupled to the backlight assembly 70 while covering the liquid crystal display panel 50 with the top chassis 60 to fix and support the liquid crystal display panel 50 on the backlight assembly 70. Let's do it.

The liquid crystal display panel assembly 40 includes a liquid crystal display panel 50, COFs 43 and 44, and a PCB 42. Here, the COFs 43 and 44 are examples of the driving IC package, and the driving IC package according to the present invention is not limited to the COF. The driver IC package collectively refers to the components packaged to apply the integrated circuit chip required to drive each pixel of the flat panel display to the flat panel display. In addition to COF, TAB (tape automated bonding) and TCP can also be used. Can be.

The liquid crystal display panel 50 includes a TFT substrate 51 composed of a plurality of TFTs, a color filter substrate 53 positioned on the TFT substrate 51, and a liquid crystal (not shown) injected between these substrates. Polarizing plates (not shown) are attached to the upper portion of the color filter substrate 53 and the lower portion of the TFT substrate 51 to polarize light.

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, and when the data driving signal and the gate driving signal are determined. COFs 43 and 44 are attached for this purpose. COFs 43 and 44 are divided into gate COFs 43 and data COFs 44, and are formed by mounting integrated circuit chips 431 and 441 on wirings formed of films, respectively.

The PCB 42 for receiving a video 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 connected to the data COF 44 attached to the liquid crystal display panel 50. The PCB 43 generates a plurality of driving signals for applying the data driving signal and the gate driving signals for driving the flat panel display device 100 at an appropriate time, thereby providing the gate driving signal and the data driving signal to the data COF 44. Through the gate line and the data line of the liquid crystal display panel 50, respectively. The gate drive signal for driving the gate line is transmitted to the gate COF 43 through the wiring formed on the data COF 44 and the TFT substrate 51. In the gate COF 43 shown in the enlarged source of FIG. 1, an input side wiring 435 that serves this role is formed.

A backlight assembly 70 is provided below the liquid crystal display panel assembly 40 to provide uniform light to the liquid crystal display panel 50. Upper and lower mold frames 71 and lower mold frames 78 are positioned on the upper and lower portions of the backlight assembly 70, respectively, to form the backlight assembly 70 including lamps 76 and the like. House the internal parts.                     

The backlight assembly 70 may include a lamp 76 that emits light, a lamp cover 75 that surrounds the lamp 76 to protect the lamp, and guides light emitted from the lamp 76 to guide the liquid crystal display panel 50. A light guide plate 74 to be supplied to the light guide plate, a reflective sheet 79 positioned below the light guide plate 74 to reflect light, and a luminance characteristic of the light from the lamp 76 to be secured to provide the light to the liquid crystal display panel 50. The optical sheet 72 for this is provided.

A cover-back 62 made of sus (stainless use steel, stainless steel) is attached to the rear surface of the lower mold frame 78, and an inverter, which is a PCB for power supply ( Install a control board (not shown) and a control board (not shown). An inverter (not shown) converts an external power supply to a constant voltage level to provide a lamp 76, and a control board (not shown) is connected to the PCB 42 to convert an analog data signal into a digital data signal and then display a liquid crystal display. The panel 50 is provided.

The top chassis 60 is disposed on the liquid crystal display panel assembly 40 to prevent the liquid crystal display panel assembly 40 from escaping from the backlight assembly 70 while bending the data COF 44 to the outside of the lower mold frame 78. It is provided. The top chassis 60 covers and fixes the edge of the liquid crystal display panel 50. The PCB 42 connected to the bent data COF 44 is seated and supported on the back side of the lower mold frame 78.

An enlarged circle of FIG. 1 shows an enlarged portion of a gate COF 43 connected to one edge 51a of the liquid crystal display panel 50 to apply a driving signal for driving the liquid crystal display panel 50. Here, the gate COF 43 is an example of the drive IC package according to the present invention, but the present invention is not limited thereto. Therefore, the present invention can also be applied to other driver IC packages of the flat panel display device 100.

The gate COF 43 includes an insulating film 437, a wiring 439, integrated circuit chips 431, 433, and the like. The wirings 439 drawn out from the integrated circuit chips 431 and 433 are formed on the insulating film 437. The integrated circuit chips 431 and 433 are mounted on the insulating film 437. The integrated circuit chips 431 and 433 are connected to the wires 439 and arranged side by side in the Y-axis direction in the width direction of the wires. Although the gate COF 43 is shown as having two integrated circuit chips mounted therein, this is merely to exemplify the present invention, and the present invention is not limited thereto. Therefore, a plurality of integrated circuit chips may be mounted on the gate COF 43.

The integrated circuit chips 431 and 433 mounted on the gate COF 43 are divided into two integrated circuit chips according to their functions. The first integrated circuit chip 431 controls each driving signal, and the second The integrated circuit chip 433 is spaced apart from the first integrated circuit chip 431 along the Y-axis direction, which is a length direction of the first integrated circuit chip 431. The second integrated circuit chip 433 operates by receiving a control signal from the first integrated circuit chip 431. Accordingly, the first integrated circuit chip 431 functions as a main integrated circuit chip, and the second integrated circuit chip 433 functions as a sub integrated circuit chip. The gate COF 43 mounting the divided integrated circuit chips 431 and 433 is connected to the gate line formed on the TFT substrate 51 to apply a driving signal thereto. Specific roles and driving methods of the integrated circuit chips 431 and 433 may be easily understood by those skilled in the art, and thus detailed descriptions thereof will be omitted.                     

In general, in order to prevent the driving IC package from being exposed to the outside of the flat panel display device 100, it is necessary to reduce the length L2 of the driving IC package in the X-axis direction. To this end, it is necessary to increase the angle of the wiring connected to the integrated circuit chip of the driving IC package and increase the pitch between the wiring lines to increase the length L1 of the driving IC package in the Y-axis direction. That is, since the length of the X-axis direction L1 is increased while reducing the length of the X-axis direction L2 of the driver IC package, the driver IC package is external to the flat panel display 100 while maintaining the surface area of the driver IC package as before. May not be exposed.

In view of the fact that the wirings are tightly connected to one integrated circuit chip to increase the angle of the wiring connected to the integrated circuit chip or increase the pitch between the wirings, the wirings are shorted by contacting each other. The length of the side of the gate COF 43 parallel to the direction is made larger than the length of the side of the gate COF 43 parallel to the width direction of the integrated circuit chips 431 and 433. That is, the Y-axis length L1 of the gate COF 43 is formed longer than the X-axis length L2 of the gate COF 43. The length L1 of the gate COF 43 in the Y-axis direction is parallel to one edge 51a of the TFT substrate 51 included in the flat panel display panel 50, and the length L2 of the gate COF 43 in the X-axis direction. ) Crosses one edge 51a of the TFT substrate 51.

By forming a plurality of integrated circuit chips 431 and 433 in the longitudinal direction, and drawing out the wirings 439, the pitch between the wirings 439 and the angle of the wirings 439 drawn out from the integrated circuit chips 431 and 433 can be adjusted. While maintaining the same, the Y-axis length L1 of the gate COF 43 can be made larger than the X-axis length L2 of the gate COF 43.

2 is a perspective view illustrating a flat panel display device 100 according to an embodiment of the present invention in which all components of the flat panel display device 100 shown in FIG. 1 are combined.

A gate COF 43 (dotted line) attached to an edge of the flat panel display panel 50 to drive the flat panel panel 50 is completely housed in the flat panel display apparatus 100 as shown in FIG. It does not come out. Therefore, a separate masking tape may be attached to the lower portion of the flat panel display 100 so that the gate COF 43 does not need to be stored inside the flat panel display 100.

3 is a partial cross-sectional view taken along the line AA of FIG. 2 and illustrates an internal structure of the flat panel display 100.

As shown in FIG. 3, one end 43a of the gate COF 43 is positioned inside the flat panel display 100. That is, when the virtual surface B (dotted line) including the side end portion 60a of the top chassis 60 and extending in the X-axis direction parallel to the flat panel display panel 50 is drawn, the gate COF 43 One end 43a is spaced apart from the virtual surface B. FIG. Therefore, since the gate COF 43 is not exposed to the outside of the flat panel display 100, it is not necessary to block the open space on the rear surface of the flat panel display 100 using a masking tape. Accordingly, there is no fear that the gate COF 43 may be exposed to the outside and cause a malfunction.

As described above, in the driving IC package according to the present invention, since the length of the side parallel to the longitudinal direction of the integrated circuit chip is greater than the length of the side parallel to the width direction of the integrated circuit chip, the pitch between wirings can be made larger. The defective rate in the OLB process is reduced.

In addition, the driving IC package according to the present invention includes a plurality of integrated circuit chips, and the integrated circuit chips are arranged side by side in the width direction of the interconnect and are interconnected, thereby reducing the length of the driving IC package.

In addition, since the second integrated circuit chip of the integrated circuit chip operates by receiving a control signal from the first integrated circuit chip, the function of the integrated circuit chip can be divided and the size thereof can be reduced, thereby reducing damage to the integrated circuit chip. .

Since COF can be used as such a drive IC package, it can be efficiently applied to the liquid crystal display device which mostly uses COF.

In the flat panel display device according to the present invention, since the length of the side parallel to one edge of the flat panel display panel is larger than the length of the side crossing the one edge of the flat panel display panel, the drive IC package is An additional process for storing the flat panel display device is unnecessary, thereby reducing manufacturing costs, and preventing malfunctions by preventing external exposure of the driving IC package.

Since the end portion of the driver IC package includes the side end portion of the top chassis and is spaced apart from the virtual surface parallel to the flat panel display panel, a masking tape is attached to the flat panel display device to insert the driver IC package into the flat panel display device. No additional process is required.

In addition, by applying the driving IC package according to the present invention to the liquid crystal display device, it is possible to improve the performance of the liquid crystal display device.

In particular, when the driver IC package is used as the gate COF of the liquid crystal display device, the performance of the liquid crystal display device is further improved and there is an advantage that there is no trouble.                     

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 (10)

Insulation film, Wiring formed on the insulating film, and An integrated circuit chip (IC chip) mounted on the insulating film and connected to the wiring; As a driver IC package comprising a, And a length of a side of the drive IC package parallel to a longitudinal direction of the integrated circuit chip is greater than a length of a side of the drive IC package parallel to a width direction of the integrated circuit chip. In claim 1, The integrated circuit chip is arranged side by side in the width direction of the wiring interconnected, a plurality of driving IC package mounted on the insulating film. In claim 2, The integrated circuit chip includes a first integrated circuit chip and a second integrated circuit chip spaced apart from each other in the longitudinal direction of the first integrated circuit chip, and the second integrated circuit chip is controlled from the first integrated circuit chip. Driver IC package that operates by receiving signals. In claim 1, The driving IC package is a chip on film (COF). A flat panel display panel displaying an image, and A driving IC package that mounts an integrated circuit chip and is connected to one edge of the flat panel display panel and applies a driving signal for driving the flat panel display panel; Including, And a length of a side of the driver IC package parallel to one edge of the flat panel display panel is greater than a length of a side of the driver IC package crossing one edge of the flat panel display panel. In claim 5, A top chassis covering and fixing an edge of the flat panel; One end of the driver IC package includes a side end portion of the top chassis and spaced apart from a virtual surface parallel to the flat panel display panel. In claim 5, And a backlight assembly for supplying light to the flat panel display panel, wherein the flat panel display panel is a liquid crystal display panel. In claim 7, The liquid crystal display panel, Color filter substrate, A TFT substrate facing the color filter substrate and having a plurality of thin film transistors (TFTs) formed thereon, and Liquid crystal injected between the color filter substrate and the TFT substrate Including, And a flat panel display connected to the driver IC package on the TFT substrate. In claim 8, And the driving IC package is connected to a gate line formed on the TFT substrate to apply a driving signal to the gate line. In claim 5, And the integrated circuit chips are arranged side by side in the width direction of the wiring and connected to each other, and the plurality of integrated circuit chips are mounted on the insulating film.

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