KR20060083268A - Protecting cover and display device using the same - Google Patents

Abstract

Disclosed are a protective cover for protecting a flexible printed circuit board and a semiconductor chip mounted on the flexible printed circuit board, and a display device using the same. The protective cover includes a first protective part, a second protective part, a connecting part and an inserting part. The first protector protects the first surface of the flexible printed circuit board. The second protector protects the second surface of the flexible printed circuit board. The connection part is formed on the opposite side to the insertion direction of the flexible printed circuit board, and supports and connects the first protection part and the second protection part to be spaced at a predetermined interval and substantially parallel to each other. The insertion portion is formed in the insertion direction of the flexible printed circuit board to guide the insertion of the flexible printed circuit board. During the assembling process of the display device, the flexible printed circuit board and the semiconductor chip mounted on the flexible printed circuit board can be prevented from being damaged by an external impact.

Description

Protective cover and display device using the same {PROTECTING COVER AND DISPLAY DEVICE USING THE SAME}

1 is a perspective view showing a protective cover according to an embodiment of the present invention.

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

3 is a state diagram showing the use of the protective cover according to an embodiment of the present invention.

FIG. 4 is a liquid crystal display device equipped with a protective cover according to an exemplary embodiment of the present invention, which is seen from the direction A of FIG. 3.

FIG. 5 is a view illustrating a liquid crystal display device having a protective cover according to an embodiment of the present invention, viewed from the direction B of FIG. 3.

Explanation of symbols on the main parts of the drawings

100: protective cover 120: first protective part

122: first base member 124: first extension member

126: second extension member 140: second protective portion

142: second base member 144: third extension member

146: fourth extension member 160: connecting portion                 

220: light guide plate 240: light source module

260: storage container 280: liquid crystal display panel

283a: gate flexible printed circuit board 284a: gate driving chip

285a: Gate Printed Circuit Board

The present invention relates to a protective cover and a display device using the same, and more particularly, to a protective cover for protecting a flexible printed circuit board and a semiconductor chip attached to the flexible printed circuit board and a display device using the same.

Recently, information processing devices have been rapidly developed to have various forms, various functions, and faster information processing speeds. Information processed in such an information processing device has an electrical signal form. In order for the user to visually check the information processed by the information processing device, a display device serving as an interface is required.

Recently, a liquid crystal display device has a light weight, a small size, a high resolution, a low power, and an environment-friendly advantage, and is capable of full color, compared to a typical CRT type display device, and is emerging as a next-generation display device.

A liquid crystal display is one of flat panel displays that display an image using a liquid crystal. The liquid crystal display device includes a liquid crystal display panel displaying an image, wherein the liquid crystal display panel includes an upper substrate on which an upper electrode is formed, a lower substrate on which a lower electrode is formed, and a liquid crystal layer interposed between the upper substrate and the lower substrate. When voltage is applied to the upper and lower electrodes, respectively, the liquid crystal molecules of the liquid crystal layer are rearranged to control the amount of light passing through the liquid crystal display panel.

The liquid crystal display may further include a driving module for applying an electrical signal for driving the liquid crystal display panel to the liquid crystal display panel.

The driving module includes a printed circuit board for outputting a control signal for driving the liquid crystal display panel, and a flexible printed circuit board for electrically connecting the printed circuit board and the liquid crystal display panel. In this case, the printed circuit board, the flexible printed circuit board, and the flexible printed circuit board and the liquid crystal display panel are each electrically connected to each other using an anisotropic conductive film (ACF) when using a tape automated bonding (TAB) method. .

Anisotropic conductive film (ACF) consists of an adhesive containing a thermosetting resin, and a conductive ball. In the connection method using an anisotropic conductive film (ACF), a thermocompression bonding apparatus is used. The thermocompression bonding apparatus applies an appropriate pressure to the anisotropic conductive film using a pressurizer heated to a predetermined temperature (for example, 340 ° C).

The anisotropic conductive film (ACF) is caused by a conductive ball that is destroyed while the conductive ball in a portion where the input pads formed on the liquid crystal display panel and the lead terminals formed on the flexible printed circuit board are in contact with each other when the pressure is applied by the pressurizer. The current is supplied between the input pads and the lead terminals. Adhesive is filled / cured on the concave-convex surfaces other than the input pads and the lead terminals to allow adhesion to each other.                         

The flexible printed circuit board which electrically connects the printed circuit board and the liquid crystal display panel by using the TAB method is bent at a predetermined angle when assembling the liquid crystal display device to a predetermined storage container which constitutes the liquid crystal display device. Is inserted.

Therefore, damage occurs at both ends of the flexible printed circuit board due to contact with the storage container in the assembly process. This is a problem that the transmission of the electrical signal between the printed circuit board and the liquid crystal display panel occurs.

In addition, the coupling portion of the liquid crystal display panel and the printed circuit board coupled to the flexible printed circuit board through the anisotropic conductive film (ACF) is damaged by vibration or shock, there is a problem that the transmission line of the electrical signal is defective. .

In addition, there is a problem that a defect occurs in the semiconductor chip for providing a driving signal to the liquid crystal display panel due to vibration or impact.

Due to the above problems, there is a problem in that the defective occurrence rate of the liquid crystal display device generated in the assembling process of the liquid crystal display device increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flexible printed circuit board for electrically connecting a liquid crystal display panel and a printed circuit board to each other, and a protective cover capable of protecting a semiconductor chip mounted on the flexible printed circuit board. It is.

Another object of the present invention is to provide a display device using the protective cover.

In order to achieve the above object of the present invention, the protective cover according to one feature comprises a first protective portion, a second protective portion, a connecting portion and an insertion portion. In a protective cover which inserts and protects a semiconductor chip and at least one flexible printed circuit board to which the semiconductor chip is attached in a predetermined insertion direction, the first protection part protects the first surface of the flexible printed circuit board. The second protector protects a second surface that is a rear surface of the first surface of the flexible printed circuit board. The connection part is formed on the opposite side of the insertion direction, and supports and connects the first protection part and the second protection part to be spaced at a predetermined interval and substantially parallel to each other. The insertion portion is formed in the insertion direction, and the flexible printed circuit board is formed in an open shape to guide the insertion.

The first and second protection parts may be formed of a base member and a plurality of extension members, respectively, and may be formed by extending the extension members in a U-shape around the base member.

In accordance with another aspect of the present invention, a display device according to one aspect includes a display panel, a storage container accommodating the display panel, a semiconductor chip for driving the display panel, and the semiconductor chip attached to the display panel. And a protective cover which protects the semiconductor chip and the flexible printed circuit board from external contact by inserting the connected flexible printed circuit board and the flexible printed circuit board in a predetermined insertion direction.

The protective cover includes a first protective part, a second protective part, a connection part, an insertion part, and a coupling part. The first protection part protects a first surface of the flexible printed circuit board. The second protector protects a second surface that is a rear surface of the first surface of the flexible printed circuit board. The connection part is formed on the opposite side of the insertion direction, and supports and connects the first protection part and the second protection part to be spaced at a predetermined interval and substantially parallel to each other. The insertion portion is formed in the insertion direction, and the flexible printed circuit board is formed in an open shape to guide the insertion. The coupling part prevents the flexible printed circuit board from moving so that the flexible printed circuit board is positioned at predetermined positions of the first and second protection parts.

The coupling part includes at least one screw, and the screw penetrates through the first and second protection parts in which the flexible printed circuit board is inserted and is coupled to the storage container.

According to such a protective cover and a display device using the same, the flexible printed circuit board and the semiconductor chip attached to the flexible printed circuit board are prevented from directly contacting the outside, thereby preventing damage due to external impact, and the flexible printed circuit. In the assembling process of the display device using the circuit board, the failure rate of the flexible printed circuit board and the semiconductor chip may be reduced to increase the yield of the display device.

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

1 is a perspective view showing a protective cover according to an embodiment of the present invention.

1 illustrates a protection cover 100 according to an embodiment of the present invention includes a first protection unit 120, a second protection unit 140, a connection unit 160, and an insertion unit 180.

The first protection part 120 includes the first base member 122, the first extension member 124 extending in the y-axis direction from the first base member 122, and the y-axis from the first base member 122. With a second elongate member 126 extending in the direction, a U-shaped shape is defined. The first base member 122, the first extension member 124, and the second extension member 126 extend by a predetermined length in the x-axis direction.

Although the length of the second extension member 126 extending in the y-axis direction is longer than that of the first extension member 124, the length of the second extension member 126 is the first extension member 124. It may be smaller than the length of) or may be formed in the same manner.

The second protection part 140 is the second base member 142, the third extension member 144 extending in the y-axis direction from the second base member 142, and the y-axis from the second base member 142. With the fourth extending member 146 extending in the direction, the U-shaped shape is defined. The second base member 142, the third extension member 144, and the fourth extension member 144, 146 extend by a predetermined length in the x-axis direction.

Although the length of the fourth extension member 146 extending in the y-axis direction is longer than that of the third extension member 144, the length of the fourth extension member 146 is longer than the length of the third extension member 144. It may be smaller than the length of) or may be formed in the same manner.

The connection part 160 connects one end of the first protection part 120 and one end of the second protection part 140. That is, from one end of the first protection unit 120 to one end of the second protection unit 140 facing the one end of the first protection unit 120 or from one end of the second protection unit 140 ( The first protective part 120 and the second protective part 140 are connected to each other by being extended by a predetermined length in the z-axis direction to one end of the first protective part 120 that faces one end of the 140.

Preferably, the connection part 160 spaces the first protection part 120 and the second protection part 140 by a first distance a when viewed on the yz plane, and the first protection when viewed on the xz plane. The part 120 and the second protection part 140 are spaced apart by the second interval b, and the first protection part 120 and the second protection part 140 are supported to be substantially parallel to each other. The first interval a and the second interval b may be formed at the same interval.

In addition, when the flexible printed circuit board is inserted through the insertion unit 180, the connection unit 160 indicates the termination of the first protection unit 120 and the second protection unit 140. The contact of the circuit board terminates the process of inserting the flexible printed circuit board into the protective cover.

The insertion unit 180 is formed in the opposite direction of the connection unit 160 and is formed in an open shape to guide the insertion of the flexible printed circuit board and the semiconductor chip attached to the flexible printed circuit board. That is, the semiconductor chip is attached to the first protective part 120 and the second protective part 140 at predetermined intervals such that the first protective part 120 and the second protective part 140 are substantially parallel to each other by the connecting part 160. The flexible printed circuit board is inserted.

In FIG. 1, the protective cover 100 according to an embodiment of the present invention includes the base members 122 and 142 and the extension members 124, 126, 144, and the first and second protective parts 120 and 140, respectively. 146) is defined as a U-shape, and defined as an elongated shape in the x-axis direction, but is not limited thereto.

For example, the protective cover 100 may include the first and second protective parts 120 and 140 to form the base members 122 and 142 and the extension members 124, 126, 144 and 146 on the same plane. It is also possible.

In addition, when the material of the first protective part 120, the second protective part 140 and the connecting member 160 is formed of a predetermined resin (resin) product, and formed to a strength enough to have a certain shape It is enough.

2 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention. The same components as in FIG. 1 will use the same reference numerals.

Referring to FIG. 2, the liquid crystal display device 200 according to an exemplary embodiment of the present invention may include a protective cover 100, a backlight unit 210, a storage container 260, a liquid crystal display panel 280, and a flexible printed circuit board. 283 and a semiconductor chip 284.

Description of the shape of the protective cover 100 will be omitted since the overlapping description above.

The backlight unit 210 includes a light guide plate 220 and a light source module 240.

The light guide plate 220 is accommodated in an inner space of the storage container 260. The light guide plate 220 emits light by changing a path of light incident from the lamp 241 disposed on one side or both sides.

The light source module 240 includes a lamp 241 and a lamp cover 242.

The lamp 241 is formed on one side or both sides of the light guide plate 220, and emits light having a predetermined brightness to the light guide plate 220. The lamp 241 may be formed using a cold cathode fluorescent lamp or a light emitting diode.

The lamp 241 is inserted into the lamp cover 242 to support the lamp 241 in a predetermined region on the side of the light guide plate 220. For this purpose, the lamp cover 242 may further include a lamp holder (not shown) for supporting the lamp. In addition, when a lamp reflector (not shown) is formed on the inner surface of the lamp cover 242, the light guide plate 220 may be reflected by reflecting the light emitted from the lamp 241 in the direction in which the lamp cover 242 is formed and lost. ) Can provide high brightness light.

In addition, the backlight unit 210 may further include a structure including optical sheets, such as a diffusion sheet and a prism sheet, to improve luminance characteristics of light emitted from the light source module 240 and passing through the light guide plate 220.

The storage container 260 includes a bottom portion 261 on which the light guide plate 220 is seated and a side portion 262 extending vertically from the outside of the bottom portion 261 to provide a storage space. The backlight unit 210 is accommodated in the storage container 260.

The liquid crystal display panel 280 is interposed between the TFT substrate 281, the color filter substrate 282 facing the TFT substrate, and the TFT substrate 281 and the color filter substrate 282 to apply an electrical signal. It consists of a liquid crystal (not shown) which changes the transmittance of light as it becomes. In addition, the liquid crystal display panel is connected to the flexible printed circuit boards 283a and 283b by an anisotropic conductive film (ACF) to receive an electrical signal.

The flexible printed circuit boards 283a and 283b generate a driving signal of the liquid crystal display panel 280 on the upper surface thereof and provide a gate or data driving to the liquid crystal display panel 280 through the flexible printed circuit boards 283a and 283b. Chips 284a and 284b are mounted, respectively.

Here, the semiconductor chip 284 means both the gate or the data driving chips 284a and 284b.

The gate driving chip 284a sequentially provides the gate driving signal input from the gate printed circuit board 285a to the liquid crystal display panel 280.                     

The data driving chip 284b provides a data signal input from the data printed circuit board 285b to the liquid crystal display panel 280 for each horizontal line. In addition, the data driving chip 284b may further include a timing controller for generating various control signals for controlling the driving of the liquid crystal display panel 280. A predetermined image is displayed by changing the transmittance of the light provided from the light source under the liquid crystal display panel 280 and the external incident light incident from the upper portion through the liquid crystal by the data signals and the control signals.

The protective cover 100 is damaged in the circuit patterns formed on the gates or the data flexible printed circuit boards 283a and 283b by contact with the outside in the assembling process of the liquid crystal display 200. In addition, stress may be generated in a portion where the gate or the data flexible printed circuit boards 283a and 283b are in contact with the outside, and thus the supply of image data or power to the liquid crystal display panel may be poor. In addition, the gate or the data driving chips 284a and 284b may be damaged, resulting in poor driving of the liquid crystal display panel. Looking at the state of use of the protective cover 100 in detail as follows.

3 is a state diagram showing the use of the protective cover according to an embodiment of the present invention. In particular, it shows the mounting of the protective cover in the state in which the liquid crystal display shown in FIG.

Referring to FIG. 3, in the protective cover 100 according to the exemplary embodiment of the present invention, the backlight unit 210 and the liquid crystal display panel 280 illustrated in FIG. 2 are accommodated in the storage container 260.

The gate flexible printed circuit board and the data flexible printed circuit boards 283a and 283b connected to the liquid crystal display panel 280 surround the outer surface of the storage container 260, and the printed circuit boards 285a on the bottom surface of the storage container 260. , 285b). When the flexible printed circuit board 283 is inserted in a bent state during the assembly process of the liquid crystal display, damage to the gate or the data driving chips 284a and 284b protruding from the outside may be caused by an impact, resulting in chip defects. And problems with gate and data flexible printed circuit boards have been described above.

3 illustrates that the protective cover 100 is coupled while the gate and data flexible printed circuit boards 283a and 283b having the gate and the data driving chips 284a and 284b mounted thereon are bent, respectively. Shown. For the sake of simplicity and understanding of the drawings, only the protection cover 100 is inserted into the gate flexible printed circuit board 283a.

The protective cover 100 is formed in a U-shaped shape, and the first protective part 120 of the protective cover 100 is inserted into the lower surface of the gate flexible printed circuit board 283a, thereby providing the gate flexible printed circuit board 283a. Prevents the bottom surface from contacting the storage container 260. To this end, the first base member 122 faces the side of the storage container 260, the first extension member 124 contacts the bottom surface of the liquid crystal display panel 280, and the second extension member 126 is illustrated. It is not, but in contact with the bottom of the gate printed circuit board.

In addition, the second protection part 140 is inserted into the upper surface of the gate flexible printed circuit board 283a to block the upper surface of the gate flexible printed circuit board 283a and the gate driving chip 284a from external contact. To this end, the second base member 142 faces the side of the storage container 260, and the third extension member 144 is formed on the upper surface of the gate flexible printed circuit board 283a and the liquid crystal on the gate flexible printed circuit board 283a. The fourth extension member 146 is inserted into the structure covering the connection terminal of the display panel 280, and the fourth extension member 146 is connected to the gate flexible printed circuit board 283a and the gate printed circuit board on the upper surface of the gate flexible printed circuit board 283a. It is inserted into the structure covering it.

That is, the third extension member 144 and the corresponding first extension member 124 are formed to have a length covering the connection terminal of the gate flexible printed circuit board 283a formed on the TFT substrate. Further, the distance a between the second base member 142 and the first base member 122 is greater than the sum of the length of the gate driving chip 284a in the y-axis direction and the thickness of the gate flexible printed circuit board 283a. Form to have a large value.

Similarly, the distance b between the third extension member 144 and the first extension member 124 is greater than the sum of the thicknesses of the TFT substrate 281 and the gate flexible printed circuit board 283a. The distance b between the extension member 146 and the second extension member 126 is greater than the sum of the thicknesses of the gate printed circuit board and the gate flexible printed circuit board 283a.

In addition, before the process of bending the gate and data flexible printed circuit boards 283a and 283b on which the gate and data driving chips 284a and 284b are mounted, the first and second protection parts 120 and 140 may be formed of base members. The protective printed circuit boards 283 and 283b and the protective cover 100 coupled with the protective cover 100 having the 122 and 142 and the extension members 124, 126, 144 and 146 formed on the same plane. It is also possible to bend at the same time.

The protective cover 100 is described in detail with the liquid crystal display device as follows.

4 is a view showing a liquid crystal display device equipped with a protective cover according to an embodiment of the present invention as shown in the direction A of FIG. 3, Figure 5 is a view from the direction B of FIG. Figure is shown. In addition, only the gate flexible printed circuit board and the protective cover mounted thereto are shown for the sake of simplicity of the drawings.

Referring to FIG. 4, the first protective part 120 of the protective cover 100 according to an embodiment of the present invention contacts the storage container 260 and the lower surface and the storage container of the gate flexible printed circuit board 283a ( 260 block contact. In addition, the first extension member 124 of the first protection part 120 is in contact with the rear surface of the TFT substrate 281 of the liquid crystal display panel 280, and the second extension member 126 is a gate printed circuit board 285a. Extend from the first base member 122 in the y-axis direction so as to contact the back surface.

In addition, the second protection part 140 surrounds the top surface of the gate flexible printed circuit board 283a and the gate driving chip 284a and moves to a predetermined area on the top surface of the liquid crystal display panel 280 and the gate printed circuit board 285a. Is extended. Therefore, the connection terminal connecting the gate flexible printed circuit board 283a, the liquid crystal display panel 280, and the gate printed circuit board 285a is not directly contacted with the outside during the assembly process, and at the same time, the gate flexible printed circuit board It is possible to prevent the 283a and the gate driving chip 284a from being damaged due to external contact.

Referring to FIG. 5, the liquid crystal display device 200 according to an exemplary embodiment of the present invention may include a gate flexible printed circuit board in which contact with the outside is blocked by the protective cover 100 during the assembly process of the liquid crystal display device 200 ( The coupling part 300 is further included to prevent the 283a from being separated from the protective cover 100.

The coupling part 300 prevents movement so that the flexible printed circuit board is positioned at a predetermined position of the first and second protection parts, and is composed of at least one screw.

The screw 320 is formed between the plurality of gate driving chips 284a, and passes through the first and second protection parts 120 and 140 shown in FIG. 4, respectively, and is coupled to the storage container 260. do.

In the protective cover 100, the insertion member of the gate flexible printed circuit board 283a is determined by the connection member 160 illustrated in FIG. 3 indicating the end of the protective cover 100 insertion.

In addition, the screw 320 prevents the movement of the gate flexible printed circuit board 283a and the like, thereby stably protecting the flexible printed circuit board 283a and the gate driving chip 284a, and at the same time, the flexible printed circuit board ( 283, the connection portions of the liquid crystal display panel 280 and the printed circuit board 285 can be protected.

For convenience of understanding, the protective cover 100 according to the present invention has been described as an example of being mounted on the gate driving chip, the gate printed circuit board, and the gate flexible printed circuit board, but the data driving chip, the data printed circuit board, It is apparent to those skilled in the art that the same applies to the data flexible circuit board.

According to the present invention as described above, a flexible printed circuit board for electrically connecting a liquid crystal display panel and a printed circuit board and a driving chip mounted on the flexible printed circuit board are inserted into a protective cover, thereby assembling a liquid crystal display device. The shock from outside can be prevented.                     

In addition, the connection part which electrically connects the flexible printed circuit board, the printed circuit board, and the liquid crystal display panel using an anisotropic conductive film (ACF) can prevent the impact from the outside during the assembly process.

In addition, the failure rate of the flexible printed circuit board, the gate or the data driving chip may be reduced during the assembly process of the liquid crystal display, thereby increasing the yield of the liquid crystal display.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (9)

In a protective cover for protecting the semiconductor chip and the at least one flexible printed circuit board to which the semiconductor chip is attached in a predetermined insertion direction, A first protective part; A second protective part; A connection part formed on an opposite side of the insertion direction and supporting and connecting the first protection part and the second protection part at predetermined intervals to be substantially parallel to each other; And A protective cover formed in the insertion direction, the flexible printed circuit board including an insertion portion formed in an open shape to guide the insertion. The method of claim 1, wherein the first protective part, A first base member on which the semiconductor chip is disposed; A first extension member extending in a predetermined direction from the first base member; And And a second extension member extending from the first base member in the same direction as the first extension member. 3. The protective cover of claim 2, wherein the first protective part is formed in a U-shape with the first and second extending members centered on the first base member. The method of claim 1, wherein the second protection unit, A second base member on which the semiconductor chip is disposed; A third extension member extending in a predetermined direction from the second base member; And And a fourth extension member extending from the second base member in the same direction as the third extension member. The protective cover according to claim 4, wherein the second protective part is formed in a U-shape with the third and fourth extension members centered on the second base member. Display panel; A storage container accommodating the display panel; A semiconductor chip for driving the display panel; A flexible printed circuit board attached to the display panel while the semiconductor chip is attached; And And a protective cover which inserts the flexible printed circuit board in a predetermined insertion direction to protect the semiconductor chip and the flexible printed circuit board from an external environment. The method of claim 6, wherein the protective cover A first protective part; A second protective part; A connection part formed on an opposite side of the insertion direction and supporting and connecting the first protection part and the second protection part at predetermined intervals to be substantially parallel to each other; An insertion portion formed in the insertion direction, the flexible printed circuit board having an opening shape for guiding the insertion; And And a coupling part for preventing movement of the flexible printed circuit board to be positioned at predetermined positions of the first and second protection parts. The display apparatus of claim 6, wherein the display panel is a liquid crystal display panel including two substrates and a liquid crystal layer interposed between the substrates. The display device of claim 6, wherein the coupling part comprises at least one screw, and the screw penetrates through the first and second protection parts in which the flexible printed circuit board is inserted and combines with the storage container. .

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