KR20170027194A - Connector for connecting plexible printed circuit and display device having thereof - Google Patents

Abstract

According to the present invention, each of a first connector and a second connector includes a body which includes a horizontal surface and a vertical surface, an insertion groove which is formed in the body to insert and fix a flexible printed circuit board, and a conductive pattern which is arranged in the insertion groove and is extended to the lower side of the horizontal surface of the body. The first and second connectors are attached to a pad region of a display panel and the printed circuit board. When the flexible printed circuit board is fixed, the flexible printed circuit board is arranged into a linear shape, thereby preventing a failure generated by the bending of the flexible printed circuit board.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a connector for connecting a flexible circuit board and a display device having the connector,

The present invention relates to a display device, and more particularly, to a display device capable of reducing a bezel area and preventing defects due to a decrease in adhesion of a flexible circuit board.

2. Description of the Related Art Recently, various portable electronic devices such as a mobile phone, a PDA, and a notebook computer have been developed. Accordingly, there is a growing need for a flat panel display device for a light and small size. As such flat panel display devices, liquid crystal displays, plasma display panels, organic electroluminescence display devices, and electrophoretic display devices have been actively studied. However, mass production technology, ease of driving means, Liquid crystal display devices (LCDs) are mainly in the spotlight due to the realization of the large-area screen and the realization thereof.

Such a liquid crystal display device is applied not only to a small portable electronic device such as a cellular phone or a tablet PC, but also to a large electronic device such as a TV in recent years.

1 is a cross-sectional view showing the structure of a conventional liquid crystal display device. As shown in FIG. 1, a conventional liquid crystal display device includes a first substrate 1 and a second substrate 3, and a liquid crystal layer (not shown) between the first substrate 1 and the second substrate 3, An LED substrate 32 mounted on the lower side surface of the liquid crystal panel 10 and having a plurality of LEDs 34 for emitting light and mounted on the lower side of the liquid crystal panel 10; A light guide plate 50 for guiding the light emitted from the LED 34 to the liquid crystal panel 10 and supplying the light to the liquid crystal panel 10 and a light guide plate 50 provided between the liquid crystal panel 10 and the light guide plate 50, An optical sheet 38 composed of a diffusing sheet 38a and prism sheets 38b and 38c for diffusing and condensing the light supplied to the panel 10 and an optical sheet 38 disposed below the light guide plate 50 and provided under the light guide plate 50 The light guide plate 50, the optical sheet 38, and the LED substrate 32 are accommodated in the housing 36 A light guide plate 50, an optical sheet 38 and an LED substrate 32 are assembled together with the lower cover 40 and the liquid crystal panel 10 is placed thereon And a guide panel 62 for guiding the light beam.

The first substrate 1 of the liquid crystal panel 10 is a thin film transistor array substrate on which thin film transistors are formed, and various wirings and pixel electrodes as well as thin film transistors are formed. The second substrate 2 is a color filter substrate, and a color filter layer and a black matrix are formed. Although not shown in the figure, the first substrate 1 is formed to have a smaller area than the second substrate 2, and when the first substrate 1 and the second substrate 2 are attached together, the first substrate 1 1 is exposed to the outside to form a pad region, and a pad is formed in the pad region to apply various signals to the liquid crystal panel 10. [

One end of a flexible printed circuit 73 is attached to the pad region of the liquid crystal panel 10 and the other end of the flexible circuit board 73 is attached to the printed circuit board 75. Although not shown in the drawing, the flexible circuit board 73 is provided with a data driving integrated circuit and / or a gate driving integrated circuit (PDP) for applying an image signal and / or a scanning signal to the liquid crystal panel 10 A control unit is mounted on the printed circuit board 73 to generate a signal from the data driving device and the gate driving device according to a control signal of the control unit and supply the signal to the liquid crystal panel 10. [

A backlight including a reflective plate 36, a light guide plate 50, an optical sheet 38 and an LED 34 is assembled to the lower cover 40. The liquid crystal panel 10 is supported on the guide panel 62, A panel 10 is disposed on the backlight.

The flexible circuit board 73 is attached to the pad area of the liquid crystal panel 10 and then bent to the rear surface of the lower cover so that the printed circuit board 75 is fixed to the rear surface of the lower cover 40.

However, the following problems arise in the liquid crystal display element having the above-described structure.

First, in the conventional liquid crystal display device, one side of the flexible circuit board 73 is attached to the printed circuit board 75 attached to the pad area by an adhesive and the other side is fixed to the lower cover 40 by an adhesive. Although the flexible circuit board 73 is flexible, the flexible circuit board 73 may be bent easily. In this case, however, the flexible circuit board 73 may be bent to cause tension on the flexible circuit board 73, This tension deteriorates the adhesive force of the flexible circuit board 73 and as a result, the flexible circuit board 73 is detached from the pad area of the liquid crystal panel 10 and the printed circuit board 75.

The flexible circuit board 73 is directly attached to the liquid crystal panel 10 so that the entire liquid crystal display device including the liquid crystal panel 10 is discarded must do it. Such disposal of the liquid crystal display element is not limited to the connection failure of the flexible circuit board 73 but also to the failure of the flexible circuit board 73 itself or the breakage of the flexible circuit board 73, But also by defects such as disconnection of wiring. However, since the manufacturing cost of the flexible circuit board 73 is much smaller than the manufacturing cost of the liquid crystal panel 10, the disposal of the liquid crystal display element is inefficient due to the failure of the flexible circuit board 73.

Thirdly, the area of the bezel of the liquid crystal display device increases due to the bent structure of the flexible circuit board 73. In recent years, a structure has been proposed in which the bezel outside the liquid crystal display element is minimized in order to reduce the weight of the liquid crystal display element and minimize the outer area in which an image is not realized. However, when the flexible circuit board 73 is bent, the curvature of the flexible circuit board 73 is formed, so that the volume occupied by the flexible circuit board 73 in the outer area of the liquid crystal display element is increased, There was a limit to minimizing. Of course, it is possible to apply pressure to the bent flexible circuit board 73 to bring the flexible circuit board 73 into close contact with the guide panel 62. However, in this case, there is a possibility that the flexible circuit board 73 is damaged The tension of the adhesive region of the flexible circuit board 73 is increased and the possibility of the adhesive failure of the flexible circuit board 73 is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a connector capable of solving the problem of adhesion failure and space increase caused by warping of a flexible printed circuit board and a display device having the connector.

In order to achieve the above-mentioned object, in the present invention, a flexible circuit board is arranged in a straight line to prevent defects due to bending of a flexible circuit board. In order to achieve the above object, according to the present invention, there is provided a first connector and a second connector separately attached to a display panel and a printed circuit board, wherein the first connector and the second connector are extended to the outside of the display panel, And a flexible circuit board fixed to the first connector and the second connector is arranged in a straight line.

The connector is provided with an insertion groove into which the flexible circuit board is inserted and fixed to the body of the insulation material. A conductive pattern connected to the circuit pattern of the flexible circuit board is provided in the insertion groove, and a signal output from the driving element of the printed circuit board To the liquid crystal panel. At this time, the conductive pattern is electrically connected to the display panel by the link line and the metal pattern of the printed circuit board, and the signal output from the driving element mounted on the printed circuit board is transmitted to the second connector, the flexible circuit board, To the display panel.

Since the conductive pattern is formed in a thin plate shape and disposed in the insertion groove, when the flexible circuit board is inserted into the insertion groove, the flexible circuit board is firmly fixed in the insertion groove by the elasticity of the conductive pattern.

In the present invention, connectors are mounted on the display panel and the printed circuit board, and the two connectors are arranged to face each other so that the flexible circuit board fixed to the connector is arranged in a straight line. As a result, defects such as deterioration of the adhesive force of the flexible circuit board caused by bending of the flexible circuit board can be caused, and space occupied by the flexible circuit board can be minimized as compared with the bent flexible circuit board. The bezel can be minimized.

In addition, since the flexible circuit board is not disposed in a bent state in the present invention, it is possible to use a flexible circuit board made of a low-elasticity material, that is, low-elasticity material.

1 is a sectional view showing the structure of a conventional liquid crystal display device;
2 is an exploded perspective view showing a structure of a liquid crystal display element according to a first embodiment of the present invention.
3 is a sectional view showing a structure of a liquid crystal display element according to a first embodiment of the present invention.
4 is a view showing a structure of a flexible circuit board;
5A to 5C are diagrams showing the structure of a connector applied to a liquid crystal display element according to the first embodiment of the present invention.
6 is an exploded perspective view showing a structure of a liquid crystal display element according to a second embodiment of the present invention.
7A to 7C are views showing the structure of a connector applied to a liquid crystal display element according to a second embodiment of the present invention.

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

In the present invention, there is a problem in flexing of a flexible printed circuit board, for example, separation of a flexible circuit board due to a decrease in adhesive force between a display panel and a printed circuit board due to an increase in tension of the flexible circuit board, And an increase in the layout space due to bending of the flexible circuit board.

The above problems are caused by bending of the flexible circuit board, so that the above problems can be solved by forming the display element with a structure in which the flexible circuit board is not bent. In the conventional display device, since the flexible circuit boards are directly bonded to the display panel and the printed circuit board, the flexible circuit boards are provided in a bent state.

In the present invention, the flexible circuit board is prevented from being bent by connecting the flexible circuit board to the display panel without attaching the flexible circuit board directly to the printed circuit board. In particular, in the present invention, a connection means such as a connector is attached to a display panel and a printed circuit board, respectively, and then a flexible circuit board is connected to the connection means to apply a signal to the display panel from the printed circuit board. At this time, since the connecting means attached to the display panel and the printed circuit board are located on a straight line, there is no need to connect the flexible circuit board to the connecting means in a bent state, and as a result, The problem can be solved.

The present invention can be applied to various flat panel display devices. That is, the present invention can be applied to various display devices such as a liquid crystal display device, an organic light emitting display device, a plasma display device, and an electrophoretic display device.

2 and 3 are views showing a structure of a display device according to a first embodiment of the present invention, in which FIG. 2 is an exploded perspective view and FIG. 3 is a cross-sectional view showing a combined structure. Although the liquid crystal display element is illustrated in the drawings by way of example, the present invention is applicable not only to such a liquid crystal display element but also to various display elements such as an organic electroluminescent display element, a plasma display element, and an electrophoretic display element. There will be.

2 and 3, the liquid crystal display according to the first embodiment of the present invention is formed of a liquid crystal panel 110 and a backlight. The liquid crystal panel 110 includes a first substrate 101 and a second substrate 103, and a liquid crystal layer (not shown) between the first substrate 101 and the second substrate 103, and implements an image as a signal is applied from the outside.

The backlight includes an LED substrate 132 disposed on the lower side of the liquid crystal panel 110 and having a plurality of light emitting devices 134 mounted thereon for emitting light, A light guide plate 150 for guiding light emitted from the light guide plate 134 to the liquid crystal panel 110 and supplying the light to the liquid crystal panel 110 and a light guide plate 150 disposed between the liquid crystal panel 110 and the light guide plate 150, An optical sheet 138 composed of a diffusion sheet 138a and prism sheets 138b and 138c for diffusing and condensing the light supplied to the light guide plate 150 and a light guide plate 150 disposed below the light guide plate 150, And a reflection plate 136 for reflecting the light.

The reflection plate 136, the light guide plate 150 and the optical sheet 138 of the backlight are housed in the lower cover 140 and then assembled as the lower cover 140 and the guide panel 162 are coupled.

A liquid crystal panel 110 is placed on the guide panel 162. The guide panel 162 is formed in a rectangular shape and an edge area of the liquid crystal panel 110 is placed on the guide panel 162.

The liquid crystal panel 110 includes a first substrate 101 and a second substrate 102 and a liquid crystal layer (not shown) disposed between the first substrate 101 and the second substrate 102 do. Though not shown in the figure, a plurality of gate lines and data lines are vertically and horizontally arranged on the first substrate 101 to define a plurality of pixel regions, and a thin film transistor serving as a switching element is formed in each pixel region A pixel electrode formed on the pixel region is formed. The thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon or the like on the gate electrode, and a source electrode and a drain electrode formed on the semiconductor layer and connected to the data line and the pixel electrode .

The second substrate 102 includes a color filter composed of a plurality of sub-color filters embodying colors of red (R), green (G) and blue (B) And a black matrix for blocking light passing through the liquid crystal layer.

A conductive layer 112 for electrostatic elimination formed of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) is formed on the outer surface of the second substrate 102, that is, So that the static electricity generated in the liquid crystal panel 110 is removed.

The first substrate 101 and the second substrate 102 constituted as described above are adhered to each other by a sealant (not shown) formed on the periphery of the image display region to constitute a liquid crystal panel, and the first substrate 101 (Not shown) formed on the first substrate 101 or the second substrate 102. As shown in FIG.

Although not shown in the drawing, a first polarizer and a second polarizer are attached to the first substrate 101 and the second substrate 102, respectively, to polarize light input to and output from the liquid crystal panel 110, .

In the case of using another display panel such as an organic light emitting display panel, a plasma display panel or an electrophoretic display panel in place of the liquid crystal panel 110, an organic light emitting layer, a plasma layer , And the electrophoretic layer will be disposed between the first substrate and the second substrate, respectively.

The first substrate 101 is formed to have a smaller area than the second substrate 102. When the first substrate 101 and the second substrate 102 are attached together, A pad region which is not covered by the second substrate 102 and which is exposed to the outside is formed, and a gate pad and a data pad, which are electrically connected to the gate line and the data line, are formed in the pad region, Is supplied to the gate line and the data line of the first substrate 101 through the gate pad and the data pad.

One end of the flexible circuit board 173 is connected to the pad area. The flexible printed circuit board 173 is provided with a gate driving element and / or a data driving element, and a circuit pattern electrically connected to the gate pad and the data pad of the pad area is formed, and the signal outputted from the gate driving element and the data driving element Are applied to the gate line and the data line of the liquid crystal panel 110 through the circuit pattern and the link line. The other end of the flexible circuit board 173 is connected to the printed circuit board 175. A control driving element is mounted on the printed circuit board 175 and a circuit wiring is formed. The control driving element is electrically connected to the gate driving element and the data driving element of the flexible circuit board 173. When a control signal is outputted from the control driving element to the gate driving element and the data driving element, the scanning signal and the image signal are fed from the gate driving element and the data driving element to the gate pad and the data pad of the liquid crystal panel 110 So that it is possible to realize an image by outputting them through the gate line and the data line, respectively.

The structure of such a flexible circuit board will be described in more detail with reference to FIG. At this time, the flexible circuit board is connected to the pad area of the liquid crystal panel 110 and the printed circuit board through the connector, but the description will be made later, and only the structure of the flexible circuit board will be described below.

4 is a plan view showing a structure in which a flexible circuit board according to the present invention is connected to a liquid crystal panel and a printed circuit board.

As shown in FIG. 4, a plurality of data driving elements 184 are disposed in one pad region of the liquid crystal panel 110. Although not shown in the drawing, gate pads are formed on the left and / or right side pad regions (i.e., gate pad regions) of the liquid crystal panel, and are electrically connected to gate lines formed in pixel regions of the liquid crystal panel 110, A scan signal is applied to the gate line. At this time, the gate driving device 184 may be formed by stacking a plurality of thin film transistors and various conductive patterns directly on a substrate of the panel 110, As shown in FIG. Further, a separate flexible circuit board on which the gate driving IC is mounted may be attached to the liquid crystal panel 110 and connected thereto.

One side of a flexible circuit board 173 on which a plurality of data driving elements 182 are mounted is attached to a pad area (i.e., a data pad area) on the upper side of the liquid crystal panel 110. On the other side of the flexible circuit board 173, A printed circuit board 171 is attached.

A plurality of data link lines 186 are disposed in the data pad area and a data driving device 182 mounted on the flexible circuit board 173 is connected to a data pad and a plurality of gate link lines 187 Is disposed to electrically connect the gate driving element 184 to the gate pad.

As shown in the drawing, a plurality of data driving devices 182 and a plurality of gate driving devices 184 are disposed in the flexible circuit board 173 and the gate pad area, respectively, attached to the data pad area, 182 and the number of the gate driving elements 184 vary depending on the size and resolution of the liquid crystal panel 110.

3, a plurality of first connectors 177 are attached to the data pad area of the first substrate 101 of the liquid crystal panel 110, and a second connector (not shown) is attached to one side of the printed circuit board 175 179 are attached. The first connector 177 and the second connector 179 are formed separately from the liquid crystal panel 110 and the printed circuit board 175 and are connected to the first connector 177 and the second connector 179 Respectively.

Both ends of the flexible circuit board 173 are inserted into and engaged with the first connector 177 and the second connector 179, respectively. Electric wiring such as a conductive pattern is formed in the first connector 177 and the second connector 179 so that the circuit pattern of the flexible circuit board 173 is electrically connected to the liquid crystal panel 110 ) And the metal pattern of the printed circuit board, respectively.

In other words, when both ends of the flexible circuit board 173 are inserted into the first connector 177 and the second connector 179, the electric wires of the first connector 177 and the second connector 179 are connected to the flexible circuit board 173, When the first connector 177 and the second connector 179 are attached to the liquid crystal panel 110 and the printed circuit board 175 respectively, the first connector 177 and the second connector 179 are electrically connected to the substrate 173, The electric wiring of the second connector 179 is electrically connected to the link line of the liquid crystal panel 110 and the metal wiring of the printed circuit board 175, respectively.

The first connector 177 and the second connector 179 are attached to the liquid crystal panel 110 and the printed circuit board 175 and extend in the outer direction of the liquid crystal panel 110, And the fastening regions of the first connector 177 and the second connector 179 in which both ends of the flexible circuit board 173 are inserted are arranged so as to face each other on the outer periphery of the liquid crystal panel 110. [ That is, as shown in the drawing, the first connector 177 and the second connector 179 are extended outwardly from the side surface of the liquid crystal panel 110, so that the fastening region where the both ends of the flexible circuit board 173 are fastened, (110). ≪ / RTI > When the flexible circuit board 173 is inserted and fixed to the first connector 177 and the second connector 179, the flexible circuit board 173 is arranged on the outer side of the liquid crystal panel 110, .

In the conventional liquid crystal display device, the attachment regions at both ends of the flexible circuit board 173 are located on the upper and lower surfaces of the liquid crystal panel 110 (since the printed circuit board is disposed on the lower surface of the liquid crystal panel 110) 173, the flexible circuit board 173 is bent along the upper surface, the side surface, and the lower surface of the liquid crystal panel 110, which causes a problem.

However, in the present invention, the first connector 177 and the second connector 179 are disposed on the liquid crystal panel 110 and the printed circuit board 175, respectively, and the first connector 177 and the second connector 179 The flexible circuit board 173 is arranged in a straight line when the flexible circuit board 173 is fastened to the first connector 177 and the second connector 179 by disposing the fastening areas facing each other. In other words, in the present invention, the flexible circuit board 173 is electrically connected to the liquid crystal panel 110 and the printed circuit board 175 through the first connector 177 and the second connector 179, 173 can be prevented from being bent, and as a result, defects due to bending of the flexible circuit board 173 can be prevented.

3, the light guide plate 150 is for guiding the light input from the LED 134 to the liquid crystal panel 110. The light incident on one side of the light guide plate 150, that is, the light entrance surface, And then propagated to the other side of the light guide plate 150 and then outputted to the outside of the light guide plate 150. At this time, the light guide plate 150 is a rectangular parallelepiped. The light guide plate 150 is formed of a material such as PMMA (Polymethyl-Methacrylate), glass or polyethylene terephthalate (PET), and an engraved pattern or a relief pattern is formed on the lower surface thereof.

The light incident into the light guide plate 150 through the light incident surface of the light guide plate 150 is reflected by the upper surface and the lower surface of the light guide plate 150 and propagates to a side opposite to the light entrance surface. The light incident on the upper surface of the light guide plate 150 at a critical angle or more with respect to the normal to the upper surface of the light guide plate 150 is totally reflected and propagated from the upper surface of the light guide plate 150 to the inside of the light guide plate 150, And is supplied to the liquid crystal panel 110.

The optical sheet 138 is supplied to the liquid crystal panel 110 by improving the efficiency of light output from the light guide plate 150. The optical sheet 138 includes a diffusion sheet 138a for diffusing the light output from the light guide plate 150 and a first diffusion sheet 138a for condensing the light diffused by the diffusion sheet to supply uniform light to the liquid crystal panel 110. [ A prism sheet 138b and a second prism sheet 138c. At this time, the diffusion sheet 138a is provided with one sheet, but the prism sheet includes a first prism sheet 138b and a second prism sheet 138c in which the prism crosses vertically in the x-, y- The light is refracted in the axial direction to improve the linearity of the light.

As the LED 134, R, G, B LEDs emitting white light of R (Red), G (Green) and B (Blue), or LED devices emitting white light may be used.

When monochromatic LEDs emitting monochromatic light are arranged, monochromatic LEDs of R, G, and B are alternately arranged at regular intervals to mix monochromatic light emitted from the LEDs into white light and then to the liquid crystal panel 110, A plurality of LED elements are arranged at regular intervals to supply white light to the liquid crystal panel 110. [

The white light LED device comprises a blue LED that emits blue light and a phosphor that emits yellow light by absorbing blue monochromatic light. The blue monochromatic light output from the blue LED and the yellow monochromatic light emitted from the phosphor are mixed to form a liquid crystal And is supplied to the panel 110. Although the LEDs 134 are disposed on one side of the light guide plate 150, the LEDs 134 may be disposed on both sides of the light guide plate 150.

The LED 134 is mounted on an LED substrate 132 made of a metal or a flexible film. The LED substrate 132 is disposed along a side surface of the light guide plate 150 and faces a side surface of the light guide plate 150. An LED 134 is mounted on the LED substrate 132, The light from the LED 134 is incident on the light guide plate 150. [

A flexible circuit board 133a is attached to an end of the LED substrate 132 and a wire 133b is attached to an end of the flexible circuit board 133a. The flexible circuit board 133a and the wire 133b are connected to a driving circuit portion outside the liquid crystal display device so that the LED 134 mounted on the LED substrate 132 is connected to the driving circuit portion of the liquid crystal display device, The LED controller drives the LED 134 according to the input signal. A signal wiring is formed on the upper surface and / or the lower surface of the flexible circuit board 133a and the signal wiring is electrically connected to the wire 133b so that the signal of the driving circuit portion is transmitted to the wire 133b and the signal of the flexible circuit board 133a And is input to the LED substrate 132 through the wiring.

However, the present invention is not limited to the LED 134 as a light source for supplying light to the liquid crystal panel 110. In the present invention, the LED 134 is illustrated as an example of a light source for convenience of explanation. The light source of the present invention is not limited to the LED 134.

A fluorescent lamp such as CCFL (Cold Cathod Fluorescent Lamp) or EFFL (External Electrode Fluorescent Lamp) may be used as the light source of the present invention. When such a fluorescent lamp is used, the use of the LED substrate 132 becomes unnecessary, and a lamp housing for accommodating the fluorescent lamp is disposed on one side of the light guide plate. Reflective material is applied to the inner surface of the lamp housing to reflect the light emitted from the fluorescent lamp to the side of the light guide plate 150 to improve the light efficiency.

The guide panel 162 is coupled to the lower cover 140 in such a manner that the upper surface thereof surrounds the edge of the optical sheet 138 of the liquid crystal panel 110 and the side surface of the lower cover 140. The liquid crystal panel 110 is seated on the upper surface of the guide panel 162.

A reflection plate 136 is disposed on the lower portion of the light guide plate 150 and the upper portion of the lower cover 140. The reflection plate 136 reflects the light emitted from the lower surface of the light guide plate 150 and reflects the light to the inside of the light guide plate 136, thereby improving the light efficiency.

As described above, in the present invention, the first connector 177 and the second connector 179 are disposed on the liquid crystal panel 110 and the printed circuit board 175, respectively, so that the first connector 177 and the second connector 179 The flexible circuit board 173 can be prevented from being bent because the flexible circuit board 173 is arranged in a straight line through the flexible circuit board 173 and electrically connected to the liquid crystal panel 110 and the printed circuit board 175, Defects due to warping of the substrate 173 can be prevented.

In addition, in the present invention, since the flexible circuit board 173 is arranged in a straight line, it is possible to use a low-cost flexible circuit board 173 with low ductility, so that the manufacturing cost can be reduced. Even in the present invention, a non-ductile circuit board may be used instead of the flexible circuit board 173 having flexibility.

The concrete structure of the first connector 177 and the second connector 179 and the specific fastening structure of the first connector 177 and the second connector 179 and the flexible circuit board 173 will be described in detail below.

5A to 5C are views showing the structure of a connector of a liquid crystal display element according to the first embodiment of the present invention. Both ends of the flexible circuit board 173 are inserted and fastened to the first connector 177 and the second connector 179 in the present invention. However, since the first connector 177 and the second connector 179 have the same structure, Hereinafter, the structure of the connector will be described as a representative of the first connector 177. FIG.

5A, the first connector 177 includes a main body 177a, an insertion groove 177b formed in the main body 177a, and a liquid crystal panel 1107 formed in the insertion groove 177b. And a bonding layer 177e formed on the contact surface of the liquid crystal panel 110 at the end of the body 177a.

The main body 177a is made of a resin material having good insulation properties such as an epoxy resin and a polyimide system and has an insertion groove 177b into which the flexible circuit board 173 is inserted. At this time, the main body 177a is integrally formed, and the insertion groove 177b may be formed therein, or two main bodies 177a having a symmetrical groove may be attached to form the insertion groove 177b.

The main body 177a has an inverted '?' Shape and has a horizontal surface and a vertical surface. A part of the lower surface of the horizontal surface is in contact with the upper surface of the pad region of the liquid crystal panel 110 and an insertion groove 177b is formed on the vertical surface, The circuit board 173 is inserted. At this time, the horizontal plane extends from the liquid crystal panel 110 to the outer area, and the vertical plane is disposed parallel to the vertical plane of the liquid crystal panel 110.

A conductive pattern 177c is disposed in the insertion groove 177b. The conductive pattern 177c is made of a metal such as Al or an Al alloy having good conductivity and is formed in a thin plate shape. The conductive pattern 177c is disposed in the groove 177b and is disposed on the horizontal surface of the main body 177a The surface contacting the one surface). At this time, the conductive pattern 117c is not attached to the inner wall of the insertion groove 177b but is spaced apart from the inner wall surface by a predetermined distance. Since the conductive pattern 117c is formed to have a predetermined thickness, The conductive pattern 117c is bent in the opposite direction and the inserted flexible circuit board 173 can be fixed by the elasticity of the conductive pattern 117c.

At least one contact pattern 177d may be formed on the conductive pattern 117c. The contact pattern 117d is integrally formed with the conductive pattern 117c in the form of a protrusion so that the conductive pattern 117c and the circuit pattern of the flexible circuit board 173 are electrically connected when the flexible circuit board 173 is inserted . Of course, even when the contact pattern 177d is not provided, since the conductive pattern 117c comes into close contact with the flexible circuit board 173 due to the elasticity of the conductive pattern 117c, the conductive pattern 117c and the flexible circuit board 173 Can be electrically connected, but it is preferable to form the contact pattern 117d for more reliable electrical connection. In addition, since the contact pattern 117d applies pressure to the flexible circuit board 173 when the flexible circuit board 173 is inserted, the inserted flexible circuit board 173 can be more firmly fixed.

A conductive adhesive member 177e such as an anisotropic conductive film or an anisotropic conductive adhesive is disposed in a region of the main body 177a that is in contact with the liquid crystal panel 110 on the horizontal surface, To the liquid crystal panel (110). At this time, the conductive pattern 117c is exposed to a part of the contact region of the main body 177a and is electrically connected to the data link line provided in the pad region of the liquid crystal panel 110 through the conductive adhesive member 117e, A signal is supplied from the data driving element mounted on the flexible circuit board 173 to the liquid crystal panel 110.

In the first connector 177 having the structure shown in FIG. 5B, at least one fixing protrusion 117f for fixing the flexible circuit board 173 is separately provided in the insertion groove 117b of the main body 117a. The fixing protrusion 117f contacts one surface of the inserted flexible circuit board 173 and the contact pattern 177d of the conductive pattern 117c contacts the other surface of the flexible circuit board 173, The flexible circuit board 173 inserted by the contact pattern 177d and the contact pattern 177d can be firmly fixed.

In the first connector 177 having the structure shown in FIG. 5C, conductive patterns 117c are formed on both sides of the insertion groove 117b, and both surfaces of the flexible circuit board 173, in which the two contact patterns 177d are inserted, . Although not shown in the drawing, a circuit pattern is provided on both surfaces of the flexible circuit board 173, and a circuit pattern is formed on both surfaces of the flexible circuit board 173 by the two contact patterns 177d. So that a signal can be applied to the liquid crystal panel 110. In addition, since the two contact patterns 117d support the flexible circuit board 173 on both sides, the flexible circuit board 173 can be firmly fixed. At this time, although the two contact patterns 117d are in contact with both surfaces of the flexible circuit board 173 at the same position, they may contact each other at different positions.

6 is a cross-sectional view showing the structure of a liquid crystal display element according to a second embodiment of the present invention.

Since the structure shown in FIG. 6 differs from the structure of the first embodiment shown in FIG. 3 only in the structure of the connector, the other structures will be briefly described and only the other structures will be described in detail.

As shown in FIG. 6, the liquid crystal display according to the second embodiment of the present invention comprises a liquid crystal panel 210 and a backlight. The liquid crystal panel 210 includes a first substrate 201 and a second substrate 203, and a liquid crystal layer (not shown) between the first substrate 201 and the second substrate 203.

The backlight includes an LED substrate 232 disposed on a lower side surface of the liquid crystal panel 210 and having a plurality of LEDs 234 mounted thereon for emitting light and an LED 234 disposed below the liquid crystal panel 210, A light guide plate 250 for guiding the emitted light to the liquid crystal panel 210 and a light guide plate 250 provided between the liquid crystal panel 210 and the light guide plate 250 to be guided from the light guide plate 250 to be supplied to the liquid crystal panel 210 An optical sheet 238 composed of a diffusion sheet 238a and prism sheets 238b and 238c for diffusing and condensing the light emitted from the light guide plate 250; And a reflection plate 236 for reflecting the light.

The reflection plate 236, the light guide plate 250 and the optical sheet 238 of the backlight are housed in the lower cover 240 and then assembled as the lower cover 240 and the guide panel 262 are coupled.

A liquid crystal panel 210 is supported on the guide panel 262 and the guide panel 262 is formed in a rectangular shape so that an edge area of the liquid crystal panel 210 is placed on the guide panel 262.

The second substrate 202 is made up of a color filter composed of a plurality of sub-color filters for realizing colors of R, G, and B, and a black matrix for separating the sub-color filters and blocking light transmitted through the liquid crystal layer have.

The first substrate 201 of the liquid crystal panel 210 extends outward and protrudes outward from the LED substrate 234. [ Also, the printed circuit board 272 attached to the lower surface of the lower cover 240 also extends outward and protrudes outward from the LED substrate 234. In other words, in this embodiment, when the liquid crystal panel 210 is assembled by the lower cover 234 and the guide panel 262, a part of the first substrate 201 and a part of the printed circuit board 275 are separated from the liquid crystal panel 210, for example, on the side where the LED substrate 234 is disposed, and protrudes toward the outer side of the guide panel 262. [

A plurality of first connectors 277 are attached to the bottom surface of the protruding region of the first substrate 201. Although not shown in the drawing, a metal pattern connected to the data link line of the pad region is formed on the lower surface of the protruded region of the first substrate 201, and is electrically connected to the conductive pattern of the first connector 277. In addition, a plurality of second connectors 279 are attached to the protruding areas of the printed circuit board 275. The first connector 277 and the second connector 279 are attached to the liquid crystal panel 210 and the printed circuit board 275 with adhesive or the like.

Both ends of the flexible circuit board 273 are inserted into the first connector 277 and the second connector 279, respectively. Although not shown in the drawings, when both ends of the flexible circuit board 273 are inserted into the first connector 277 and the second connector 279, the conductive patterns of the first connector 277 and the second connector 279 When the first connector 277 and the second connector 279 are attached to the liquid crystal panel 210 and the printed circuit board 275, respectively, when the first connector 277 and the second connector 279 are attached to the circuit pattern of the flexible circuit board 273, The conductive patterns of the first connector 277 and the second connector 279 are electrically connected to the metal pattern of the liquid crystal panel 210 and the metal pattern of the printed circuit board 275, respectively.

In the first embodiment shown in Fig. 3, the first connector and the second connector are respectively attached to the liquid crystal panel and the printed circuit board, extend in the outward direction of the liquid crystal panel and protrude to the outer region of the liquid crystal panel, In this embodiment, the first connector 277 and the second connector 279 are connected to the liquid crystal panel 210 and the printed circuit board (not shown), respectively, while the first connector 277 and the second connector 279 are inserted into the first connector and the second connector, It is not necessary to form the first connector 277 and the second connector 279 in a curved shape so that the first connector 277 and the second connector 279 can be easily connected to each other, 2 connector 279 can be simplified. As a result, manufacturing cost of the first connector 277 and the second connector 279 can be reduced.

In the first embodiment shown in FIG. 3, the first connector 277 and the second connector 279 are formed in a first bent shape, and in the second embodiment, the first connector 277 and the second connector 279 279) are made of a simple structure, but the present invention can use these two structures in combination.

7A to 7C are views showing the structure of a connector applied to the liquid crystal display element of the second embodiment. At this time, since the first connector 2771 and the second connector 279 have the same structure, the structure of the connector will be described as a representative of the second connector 277 as follows.

7A, the first connector 277 includes a main body 277a, an insertion groove 277b formed in the main body 277a, a liquid crystal panel 210 (not shown) formed in the insertion groove 277b, , And an adhesive layer 277e formed on the upper surface of the main body 277a.

5A, the upper surface of the horizontal surface of the main body 277a of the first connector 277 is in contact with the upper surface of the liquid crystal panel in the liquid crystal panel. In contrast, in the connector of the first embodiment shown in FIG. The adhesive layer 277e is provided over at least a part or the whole area of the upper part of the horizontal plane of the main body 277a since the lower surface of the main body 277a is in contact with the lower surface of the first substrate 201 of the panel 210. [

The horizontal plane of the first body 277a extends from the liquid crystal panel 210 to an outer area, and the vertical plane is disposed in parallel with the vertical plane of the liquid crystal panel 210. [ The conductive pattern 277c is made of a metal such as Al or an Al alloy having good conductivity and is formed in a thin plate shape and is disposed in the groove inside 277b and extends to the upper part of the horizontal plane of the main body 277a, Is electrically connected to a circuit pattern disposed on the lower surface of the first substrate 201.

The conductive pattern 217c is disposed inside the insertion groove 277b and is formed in a thin plate shape so that when the flexible circuit board 273 is inserted into the insertion groove 277b, The flexible circuit board 273 can be fixed. At least one contact pattern 277d electrically connecting the conductive pattern 217c and the circuit pattern of the flexible circuit board 273 is formed in the conductive pattern 217c when the flexible circuit board 273 is inserted .

In the first connector 277 having the structure shown in FIG. 7B, at least one fixing protrusion 217f for fixing the flexible circuit board 273 is separately provided in the insertion groove 217b of the main body 217a. The fixing protrusions 217f contact one surface of the inserted flexible circuit board 273 and the contact patterns 277d of the conductive patterns 217c contact the other surface of the flexible circuit board 273, 217f and the contact pattern 277d can firmly fix the flexible circuit board 273 inserted therein.

In the first connector 277 having the structure shown in Fig. 7C, the conductive pattern 217c is formed on both sides of the insertion groove 217b, and both surfaces of the flexible circuit board 173, on which the two contact patterns 277d are inserted, . Although not shown in the drawing, a circuit pattern is provided on both sides of the flexible circuit board 273, and a circuit pattern formed on both sides of the flexible circuit board 273 by the two contact patterns 277d So that a signal can be applied to the liquid crystal panel 210. In addition, since the two contact patterns 217d support the flexible circuit board 273 on both sides, the flexible circuit board 273 can be firmly fixed. At this time, in the figure, the two contact patterns 217d are in contact with both surfaces of the flexible circuit board 273 at the same position, but may contact each other at different positions.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Therefore, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also within the scope of the present invention.

110: liquid crystal panel 132: LED
138: optical sheet 140: bottom cover
150: light guide plate 162: guide panel
173: Flexible circuit board 177,179: Connector

Claims (10)

Display panel;
A flexible circuit board having one end connected to the display panel and applying a signal to the display panel from outside;
A printed circuit board on which a driving element is mounted and the other end of the flexible circuit board is connected;
A first connector and a second connector which are respectively attached to the display panel and the printed circuit board and fix both ends of the flexible circuit board,
Wherein the flexible circuit board is fixed by the first connector and the second connector and arranged in a straight line. The display device according to claim 1,
A first substrate including a pad region in which a pad is disposed;
A second substrate bonded to the first substrate; And
And image display means disposed between the first substrate and the second substrate. The display device according to claim 1, wherein the first connector is attached to the upper surface of the pad region of the first substrate and the second connector is attached to the lower surface of the printed circuit board. The connector according to claim 3,
A body including a horizontal plane and a vertical plane;
An insertion groove provided in the main body and into which the flexible circuit board is inserted and fixed;
A conductive pattern disposed in the insertion groove and extending to a bottom surface of the main body in a horizontal direction; And
And an adhesive layer provided on a horizontal surface of the main body. The connector according to claim 3,
A body including a horizontal plane and a vertical plane;
An insertion groove provided in the main body and into which the flexible circuit board is inserted and fixed;
A conductive pattern disposed in the insertion groove and extending to a bottom surface of the main body in a horizontal direction; And
And an adhesive layer provided on an upper surface of the horizontal surface of the body. The connector according to claim 4 or 6, wherein the first connector and the second connector comprise:
And a projection for fixing the flexible circuit board which is arranged and inserted in the body in the insertion groove. The connector according to claim 4 or 6, wherein the first connector and the second connector comprise:
Further comprising a contact pattern electrically connected to a circuit pattern on one surface or both surfaces of a flexible circuit board disposed and inserted in the conductive pattern. The display device according to claim 1, wherein the display panel comprises a liquid crystal panel, an organic light emitting display panel, a plasma display panel, and an electrophoretic display panel. A body including a horizontal plane and a vertical plane;
An insertion groove provided in the main body and into which the flexible circuit board is inserted and fixed; And
And a conductive pattern connected to a circuit pattern of a flexible circuit board which is arranged and inserted in the insertion groove. 10. The connector according to claim 9,
A protrusion disposed on the body in the insertion groove to fix a flexible circuit board to be inserted; And
And a contact pattern electrically connected to a circuit pattern on one surface or both surfaces of a flexible circuit board disposed and inserted in the conductive pattern.

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