KR101002931B1 - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display device capable of improving assembly workability is disclosed. The liquid crystal display device includes an integrated printed circuit board connected to the data side of the liquid crystal display panel and disposed on the rear side of the backlight unit, and a gate printed circuit board and the backlight unit connected to the gate side of the liquid crystal display panel and disposed on the outer side of the backlight unit. It is mounted therein and includes a connecting member for electrically connecting the integrated printed circuit board and the gate printed circuit board. In this way, by mounting the connection member inside the backlight unit, it is possible to prevent breakage of components and to improve workability of the assembly process.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

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

FIG. 2 is a perspective view illustrating a rear surface of the display unit and the backlight unit illustrated in FIG. 1.

3 is a perspective view illustrating in detail the connection member illustrated in FIG. 1.

4 is a cross-sectional view of the connecting member of FIG. 3.

5 is a perspective view illustrating a rear surface of the storage container in which the connection member shown in FIG. 1 is mounted.

6 is a perspective view illustrating a contact terminal of the integrated printed circuit board of FIG. 1.

FIG. 7 is a cross-sectional view illustrating a connection relationship between a connection member illustrated in FIG. 1, an integrated printed circuit board, and a gate printed circuit board.

FIG. 8 is a perspective view illustrating a housing of the storage container illustrated in FIG. 1.

9 is a perspective view illustrating a rear surface of a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 10 is a perspective view illustrating a coupling relationship between the storage container and the connection member illustrated in FIG. 9.                 

FIG. 11 is a perspective view illustrating an outer surface of the storage container illustrated in FIG. 10.

<Explanation of symbols for the main parts of the drawings>

110: liquid crystal display panel 120: integrated printed circuit board

130: gate printed circuit board 200: backlight unit

300: connection member 510: data printed circuit board

520 control printed circuit board 530 flexible printed circuit board

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device including a data printed circuit board for driving a data driving chip connected to a liquid crystal display panel and a gate printed circuit board for driving a gate driving chip. It is about.

Recently, the information processing apparatus has been rapidly developed to have various forms, various functions, and faster information processing speed. Information processed in such an information processing apparatus has an electrical signal form. Therefore, the user needs a display apparatus to visually confirm the information processed by the information processing apparatus.

Among these display devices, a liquid crystal display device is one of flat panel displays that display an image using liquid crystal, and is thinner and lighter than other display devices, and has low power consumption and low driving voltage. There is an advantage in that it is widely used throughout the industry.                         

Such a liquid crystal display device is composed of a display unit for displaying an image and a backlight unit for providing light to the display unit.

The display unit may include a liquid crystal display panel displaying an image, a data printed circuit board (PCB) for driving a data driving chip connected to a data line of the liquid crystal display panel, and a gate connected to a gate line of the liquid crystal display panel. And a gate printed circuit board for driving the driving chip.

The display unit may further include a control printed circuit board for controlling the data printed circuit board and the gate printed circuit board. The control printed circuit board is connected to the data printed circuit board through a first flexible printed circuit (FPC).

The data control signal generated from the control printed circuit board is applied to the data printed circuit board through the first flexible printed circuit board. On the other hand, a second flexible printed circuit board is further needed to apply the gate control signal generated from the control printed circuit board to the gate printed circuit board.

The second flexible printed circuit board may be connected between the data printed circuit board and the gate printed circuit board or between the control printed circuit board and the gate printed circuit board. When the second flexible printed circuit board is connected between the data printed circuit board and the gate printed circuit board, the gate control signal may include a first flexible printed circuit board, the data printed circuit board, and the second flexible printed circuit board. It is applied to the gate printed circuit board via a path via.                         

However, since the second flexible printed circuit board for applying the gate control signal to the gate printed circuit board is exposed to the outside of the backlight unit, it causes damage to the component due to the jamming phenomenon during the assembling process, and inconvenience of handling. This results in a problem of lowering assembly workability.

Accordingly, the present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a liquid crystal display device capable of improving the workability of an assembly process.

A liquid crystal display device according to an embodiment for achieving the above object of the present invention includes a backlight unit for supplying light, a liquid crystal display panel, a first printed circuit board, a second printed circuit board and a connection member.

The liquid crystal display panel is disposed above the backlight unit and displays an image by using light supplied from the backlight unit.

The first printed circuit board is connected to a first end of the liquid crystal display panel through a data tape carrier package (hereinafter referred to as TCP), and is mounted on a rear surface of the backlight unit by bending the data TCP. do.

The second printed circuit board is connected to the second end perpendicular to the first end of the liquid crystal display panel through a gate TCP, and is mounted on an outer surface of the backlight unit by bending the gate TCP.

The connection member is mounted in the backlight unit and electrically connects the first printed circuit board and the second printed circuit board.

In this embodiment, the first printed circuit board is an integrated printed circuit board in which a data printed circuit board and a control printed circuit board are combined, and the second printed circuit board is a gate printed circuit board.

In addition, a liquid crystal display device according to another embodiment for achieving the object of the present invention is a backlight unit for supplying light, a liquid crystal display panel disposed on the backlight unit, a first printed circuit board, a second printed circuit board, And a third printed circuit board and a connection member.

The first printed circuit board is connected to the first end of the liquid crystal display panel through data TCP, and is mounted on the first outer surface of the backlight unit by bending the data TCP.

The second printed circuit board is connected to the first printed circuit board through a flexible circuit film and is mounted on a rear surface of the backlight unit.

The third printed circuit board is connected to the second end perpendicular to the first end of the liquid crystal display panel through the gate TCP, and the second external circuit perpendicular to the first outer surface of the backlight unit is bent by bending the gate TCP. It is mounted on the side.

The connection member is mounted in the backlight unit and electrically connects the first printed circuit board and the third printed circuit board.

In this embodiment, the first printed circuit board is a data printed circuit board, the second printed circuit board is a control printed circuit board, and the third printed circuit board is a gate printed circuit board.                     

According to the liquid crystal display device, a connection member for applying a gate control signal to the gate printed circuit board is mounted inside the backlight unit, thereby preventing damage to components and improving workability of the assembly process.

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

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a perspective view illustrating a rear side of the display unit and the backlight unit illustrated in FIG. 1.

1 and 2, the liquid crystal display 1000 according to an exemplary embodiment of the present invention may include a display unit 100 for displaying an image and a backlight unit 200 for supplying light to the display unit 100. ) And a connection member 300 mounted inside the backlight unit 200.

The display unit 100 includes a liquid crystal display panel 110, an integrated printed circuit board 120, and a gate printed circuit board 130.

The liquid crystal display panel 110 is disposed above the backlight unit 200 and displays an image by using light supplied from the backlight unit 200. The liquid crystal display panel 110 includes a thin film transistor (hereinafter, referred to as TFT) substrate 112, a color filter substrate 114, and a liquid crystal (not shown) interposed between the two substrates 112 and 114. .

The TFT substrate 112 is a transparent glass substrate in which a switching element TFT (not shown) is formed in a matrix form. A data line is connected to a source terminal of the TFTs, and a gate line is connected to a gate terminal. In addition, a pixel electrode made of a transparent conductive material is connected to the drain terminal.

The color filter substrate 114 is provided opposite the TFT substrate 112. The color filter substrate 114 is a substrate in which RGB pixels, which are color pixels that are expressed in a predetermined color when light passes, are formed by a thin film process. A common electrode made of a transparent conductive material is formed on the front surface of the color filter substrate 114.

In the liquid crystal display panel 110 having such a configuration, when power is applied to the gate electrode and the source electrode of the TFTs, the TFT is turned on, and an electric field is formed between the pixel electrode and the common electrode. By this electric field, the arrangement angle of the liquid crystal injected between the TFT substrate 112 and the color filter substrate 114 is changed, and the light transmittance is changed according to the changed arrangement angle to display the gray level of the desired image.

The integrated printed circuit board 120 is a printed circuit board in which the functions of the data printed circuit board and the control printed circuit board are integrated. The integrated printed circuit board 120 is connected to the first end of the TFT substrate 112 through the data TCP 140, and is mounted on the rear surface of the backlight unit 200 by bending the data TCP 140.

The gate printed circuit board 130 is electrically connected to the second end perpendicular to the first end of the TFT substrate 112 through the gate TCP 150. The gate printed circuit board 130 is mounted on the outer surface of the backlight unit 200 by bending the gate TCP 150.

The data TCP 140 and the gate TCP 150 include a data driving chip 142 and a gate driving chip 152, respectively, and are formed on the TFT substrate 112 via an anisotropic conductive film (ACF). Connected.

The backlight unit 200 for supplying light is disposed under the liquid crystal display panel 110. The backlight unit 200 includes a lamp unit 210, an optical member 220, and a storage container 230.

The lamp unit 210 includes a lamp 212 for generating light and a lamp reflector 214 for reflecting light generated from the lamp 212 to the light guide plate 222. The lamp unit 210 having such a configuration is disposed on one side of the light guide plate 222 or both sides facing each other, and supplies the generated light to the light guide plate 222.

The optical member 220 includes a light guide plate 222, an optical sheet 224, and a reflective sheet 226. The light guide plate 222 changes the path of the light incident from the lamp unit 210 and emits light toward the liquid crystal display panel 110. To this end, a reflection dot (not shown) may be formed on the lower surface of the light guide plate 222 to scatter and reflect light, and the reflection dot is formed to have a change in density depending on a position for uniform emission of light.

The optical sheet 224 is disposed between the light guide plate 222 and the liquid crystal display panel 110. The optical sheet 224 includes a diffusion sheet for diffusing light and a prism sheet for condensing light, and improves front luminance and luminance uniformity of the light emitted from the light guide plate 222.

The reflective sheet 226 is disposed under the light guide plate 222 to reflect the light leaked from the light guide plate 222 back to the light guide plate 222. The reflective sheet 226 prevents light leakage to improve light utilization efficiency.

The storage container 230 includes a bottom portion 232 and a side portion 234 extending vertically from an edge of the bottom portion 232. The lamp unit 210 and the optical member 220 are accommodated in the storage container 230.

In addition, the backlight unit 200 may further include a fixing member 240 for fixing the lamp unit 210 and the optical member 220 accommodated in the storage container 230. The fixing member 240 is coupled to the storage container 230 to prevent the optical member 220 from being separated and guide the mounting position of the liquid crystal display panel 110 mounted on the upper portion.

In addition, the top chassis 400 is coupled with the storage container 230 to fix the liquid crystal display panel 110 mounted on the fixing member 240.

Meanwhile, a connection member 300 for mounting the integrated printed circuit board 120 and the gate printed circuit board 130 to be electrically connected to the storage container 230 is mounted.

3 is a perspective view illustrating in detail the connection member illustrated in FIG. 1, and FIG. 4 is a cross-sectional view of the connection member of FIG. 3.

3 and 4, the connection member 300 includes a plurality of conductive lines 310, a first connector 320, and a second connector 330.

The plurality of conductive lines 310 are insulated from each other by being spaced apart from each other by a predetermined interval between the flexible first and second insulating layers 360 and 370. One end of the plurality of conductive lines 310 is fastened to the first connector 320, and the other end is fastened to the second connector 330.

The first connector 320 includes the same number of first conductive pins 340 as the conductive lines 310. The plurality of first conductive pins 340 are connected to one end of the plurality of conductive lines 310 inserted into the first connector 320, respectively, and protrude out of the first connector 320.

The second connector 330 includes the same number of second conductive pins 350 as the conductive lines 310. The plurality of second conductive pins 350 are connected to the other ends of the plurality of conductive lines 310 inserted into the second connector 330, respectively, and protrude out of the second connector 330.

The connection member 300 having such a configuration may be freely bent due to the flexibility of the first and second insulating layers 360 and 370. In the present embodiment, the connection member 300 connects the integrated printed circuit board 120 disposed on the rear surface of the storage container 230 and the gate printed circuit board 130 disposed on the outer surface of the storage container 230. In order to be bent, a part of the bottom part 232 and the side part 234 is bent inside the storage container 230.

5 is a perspective view illustrating a rear surface of the storage container in which the connection member shown in FIG. 1 is mounted.

Referring to FIG. 5, in the connection member 300 mounted inside the storage container 230, a first connector 320 is disposed on the bottom portion 232, and a second connector 330 is disposed on the side portion 234. It is bent to be placed and mounted.

A first opening portion 232a is formed in the bottom portion 232 of the storage container 230 to correspond to a mounting position of the first connector 320, and a side portion 234 in which the gate printed circuit board 130 is disposed is formed. The second opening 234a is formed corresponding to the mounting position of the second connector 330.

Accordingly, the first connector 320 is exposed to the outside of the storage container 230 through the first opening 232a, and the plurality of first conductive pins 340 have a predetermined length based on the rear surface of the storage container 230. As long as it protrudes outward. The second connector 330 is exposed to the outside of the storage container 230 through the second opening 234a, the plurality of second conductive pins 350 by a predetermined length relative to the outer surface of the storage container 230. It protrudes outward.

Meanwhile, the integrated printed circuit board 120 and the gate printed circuit board 130 disposed on the rear and outer surfaces of the storage container 230 are contact terminals for connection with the first and second conductive pins 340 and 350. It includes.

6 is a perspective view illustrating a contact terminal of the integrated printed circuit board of FIG. 1.

Referring to FIG. 6, the integrated printed circuit board 120 may include a base substrate 122, an insulating layer 126, and a plurality of first contact terminals 124.

A plurality of first contact terminals 124 is formed on the base substrate 122 made of an insulating material, and an insulating layer 126 is applied to an area except for the plurality of first contact terminals 124. Therefore, the plurality of first contact terminals 124 are exposed to the outside.

The first contact terminal 124 is formed in the same number as the first conductive pins 340. In addition, the plurality of first contact terminals 124 may be formed at positions corresponding to the first conductive pins 340 by mounting the integrated printed circuit board 120 on the rear surface of the storage container 230.

Although not shown, the integrated printed circuit board 120 may further include a plurality of electronic devices and signal wires for generating data and gate control signals.

Since the second contact terminal formed on the gate printed circuit board 130 has the same structure as that of the first contact terminal 124, the overlapping description thereof will be omitted.

FIG. 7 is a cross-sectional view illustrating a connection relationship between a connection member illustrated in FIG. 1, an integrated printed circuit board, and a gate printed circuit board.

Referring to FIG. 7, the connection member 300 is disposed over the bottom portion 232 and the side portion 234 inside the storage container 230. The first connector 320 is exposed to the outside by the first opening 232a formed in the bottom portion 232, and the first conductive pin 340 is extended to the outside by a predetermined length based on the rear surface of the storage container 230. It protrudes. The second connector 330 is exposed to the outside through the second opening 234a formed in the side portion 234, and the second conductive pin 350 is moved outward by a predetermined length based on the outer surface of the storage container 230. It protrudes.

The integrated printed circuit board 120 is disposed on the rear surface of the storage container 230 by bending the data TCP 140, and is fixed to the rear surface by a screw fastening method. In this case, the plurality of first contact terminals 124 formed on the integrated printed circuit board 120 are in one-to-one contact with the plurality of first conductive pins 340, respectively.

The gate printed circuit board 130 is disposed on the outer surface of the storage container 230 by bending the gate TCP 150, and is fixed to the outer surface by a screw fastening method. In this case, the plurality of second contact terminals 134 formed on the gate printed circuit board 130 are in one-to-one contact with the plurality of second conductive pins 350, respectively.

Therefore, the data control signal generated from the integrated printed circuit board 120 is applied to the TFT substrate 112 through the data TCP 140, and the gate control signal is connected to the connection member 300 mounted inside the storage container 230. Is transmitted to the gate printed circuit board 130 through the gate TCP, and is applied to the TFT substrate 112 through the gate TCP 150.

On the other hand, since the connection member 300 mounted inside the storage container 230 has a predetermined thickness and width, it may affect the stable storage of the optical member 220. Accordingly, the storage container 230 may further include a storage unit 236 for housing the connection member 300.

FIG. 8 is a perspective view illustrating a housing of the storage container illustrated in FIG. 1.

Referring to FIG. 8, an accommodating part 236 is formed at a bottom portion 232 and a side part 234 of the accommodating container 230 corresponding to a position where the connection member 300 is accommodated.

The storage part 236 is formed to be recessed from the bottom 232 and the side part 234 of the storage container 230 by a predetermined depth in an outward direction. The width and depth of the accommodating part 236 are formed to correspond to the width and thickness of the connection member 300. First and second openings 232a and 234a are formed at both ends of the accommodating part 236 in which the first and second connectors 320 and 330 are disposed, respectively.

By storing the connection member 300 in the accommodating part 236, the optical member 220 accommodated in the accommodating container 230 may be stably fixed.

9 is a perspective view illustrating a rear surface of a liquid crystal display according to another exemplary embodiment of the present invention. FIG. 10 is a perspective view illustrating a coupling relationship between a storage container and a connection member of FIG. 9, and FIG. 11 is illustrated in FIG. 10. A perspective view showing the outer side of the storage container. In the present embodiment, the rest of the configuration except for the integrated printed circuit board is the same as that of the liquid crystal display device 1000 according to the exemplary embodiment shown in FIG. 1, and thus a duplicate description thereof will be omitted. We use the sign.

9 to 11, the liquid crystal display 2000 according to another exemplary embodiment includes a data printed circuit board 510, a control printed circuit board 520, and a gate printed circuit board 130. .

The data printed circuit board 510 is disposed on the first outer side surface 235 of the storage container 230 by bending the data TCP 140. The control printed circuit board 520 is connected to the data printed circuit board 510 through the flexible printed circuit board 530. The control printed circuit board 520 is connected to the rear surface 237 of the storage container 230 by bending the flexible printed circuit board 530. Is placed. The gate printed circuit board 130 is disposed on the second outer surface 236 perpendicular to the first outer surface 235 of the storage container 230 by the bending of the gate TCP 150. As such, when the data printed circuit board 510 is disposed on the first outer surface 235, the manufacturing cost may be reduced by reducing the length of the data TCP 140.

The connection member 300 is mounted inside the storage container 230 to connect the data printed circuit board 510 and the gate printed circuit board 130. The connection member 300 is bent and disposed to partially cover the first and second inner surfaces 238 and 239 corresponding to the first and second outer surfaces 235 and 236, respectively. The first connector 320 is exposed to the outside through the first opening 235a penetrating through the first inner surface 238 and the first outer surface 235, and the plurality of first conductive pins 340 are firstly exposed. It protrudes outward by a predetermined length with respect to the outer surface 235. The second connector 330 is exposed to the outside through the second opening 236a penetrating through the second inner side surface 239 and the second outer side surface 236, and the plurality of second conductive pins 350 are disposed on the second side. It protrudes outward by a predetermined length with respect to the outer surface 236.

Accordingly, the data control signal generated from the control printed circuit board 520 is applied to the data printed circuit board 510 through the flexible printed circuit board 530, and the gate control signal is printed on the flexible printed circuit board 530 and data printed. The printed circuit board 130 is applied to the gate printed circuit board 130 via the circuit board 510 and the connection member 300.

Meanwhile, in the present embodiment, the connection member 300 may be arranged to connect the control printed circuit board 520 and the gate printed circuit board 130.

In the above description, the connection member 300 has been described as an example of a flexible printed circuit board (FPC) including a plurality of conductive lines, but in addition, it has flexibility such as a flexible flat cable (FFC). If anything, anything.

According to such a liquid crystal display device, by installing a connection member for applying the gate control signal generated from the integrated printed circuit board or the control printed circuit board to the gate printed circuit board inside the backlight unit, to prevent damage to the parts, The workability of the assembly process can be improved.

In the detailed description of the present invention described above with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the invention described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (12)

A storage container for storing a lamp for generating light; A liquid crystal display panel disposed on the storage container to display an image; A first printed circuit board connected to a first end of the liquid crystal display panel through data TCP and mounted on a rear surface of the storage container by bending the data TCP; A second printed circuit board connected to a second end perpendicular to the first end of the liquid crystal display panel through a gate TCP and mounted on an outer surface of the storage container by bending the gate TCP; And And a connection member mounted inside the storage container and connecting the first printed circuit board and the second printed circuit board through an opening formed in the storage container. The method of claim 1, wherein the connecting member A plurality of conductive lines; A first connector having a plurality of first conductive pins connected to one end of each of the plurality of conductive lines; And And a second connector having a plurality of second conductive pins connected to the other ends of each of the plurality of conductive lines. The method of claim 2, The plurality of first conductive pins are exposed to the outside from the rear surface of the storage container corresponding to the mounting position of the first printed circuit board, The plurality of second conductive pins are exposed to the outside from the outer surface of the storage container corresponding to the mounting position of the second printed circuit board. The method of claim 3, The first printed circuit board includes a plurality of first contact terminals respectively contacting the plurality of first conductive pins. And the second printed circuit board includes a plurality of second contact terminals respectively contacting the plurality of second conductive pins. delete 3. The liquid crystal display of claim 2, wherein the storage container further comprises a housing for accommodating the connection member, wherein the housing is formed at a position corresponding to the first connector and the second connector. Device. A storage container for storing a lamp for generating light; A liquid crystal display panel disposed on the storage container to display an image; A first printed circuit board connected to a first end of the liquid crystal display panel through data TCP and mounted on a first outer surface of the storage container by bending the data TCP; A second printed circuit board connected to the first printed circuit board and the flexible printed circuit board and mounted on a rear surface of the storage container; A third printing connected to a second end perpendicular to the first end of the liquid crystal display panel through a gate TCP and mounted on a second outer side surface perpendicular to the first outer side of the storage container by bending the gate TCP; Circuit board; And And a connection member mounted inside the storage container and electrically connecting the first printed circuit board and the third printed circuit board through an opening formed in the storage container. delete The liquid crystal display of claim 7, wherein the connection member is fixed to first and second inner surfaces corresponding to the first and second outer surfaces of the storage container, respectively. The method of claim 7, wherein the connecting member A plurality of conductive lines; A first connector having a plurality of first conductive pins connected to one end of each of the plurality of conductive lines; And And a second connector having a plurality of second conductive pins connected to the other ends of each of the plurality of conductive lines. The method of claim 10, The plurality of first conductive pins are exposed to the outside of the first outer surface for contact with the first printed circuit board, The plurality of second conductive pins are exposed to the outside of the second outer surface for contact with the third printed circuit board. The method of claim 11, The first printed circuit board includes a plurality of first contact terminals respectively contacting the plurality of first conductive pins. And the third printed circuit board includes a plurality of second contact terminals respectively contacting the plurality of second conductive pins.

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