KR101351553B1 - Liquid Crystal Display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a direct type liquid crystal display device having a single inverter unit for dividing and driving a plurality of lamps in a high-high manner.

A feature of the present invention is to form a PCB wiring that replaces a part of the wires used in the prior art on the first balance PCB having the inverter portion provided with a back side and a plurality of lamp sockets to which the lamp is fastened, or the inverter PCB on the inverter PCB. It is to form a PCB wiring to replace a part of the wire used in the.

Therefore, it is possible to improve the workability and reliability for the wire processing through the present invention, it is possible to shorten the overall length of the wire used for manufacturing the liquid crystal display device, thereby reducing the manufacturing cost of the liquid crystal display device.

Description

[0001] The present invention relates to a liquid crystal display device,

1 is an exploded perspective view of a liquid crystal display according to the related art.

2 is a view schematically illustrating a rear structure of a liquid crystal display according to the related art.

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

4 is a plan view schematically illustrating a structure of a balance PCB coupled to both ends of a lamp according to a first embodiment of the present invention;

FIG. 5 schematically illustrates a rear structure of a liquid crystal display according to a first embodiment of the present invention.

FIG. 6 schematically illustrates a rear structure of a liquid crystal display according to a second exemplary embodiment of the present invention. FIG.

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

110: liquid crystal panel 122: reflective sheet

124: lamp 126: optical sheet

132: lamp socket 133: support side

134a: first balance PCB 134b: second balance PCB

135: inverter PCB 136a: first inverter

136b: second inverter 138: connector

139a to 139c: first to third PCB wiring

141 to 145: first to fifth wire

150: cover bottom

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a direct type liquid crystal display device having a single inverter unit for dividing and driving a plurality of lamps in a high-high manner.

Recently, as the information society has developed rapidly, the need for a flat panel display (FPD) having excellent characteristics such as thinning and low power consumption has emerged.

Such a flat panel display can be divided according to whether it emits light by itself or not. A light emitting display device displays light by itself and displays an image by using an external light source. It is called a device.

The light emitting display includes a plasma display panel (PDP), a field emission display (FED), an electro luminescence display (EL), and the like. There is a liquid crystal display device (LCD).

Among them, liquid crystal display devices, which are widely used for TVs and monitors, are advantageous for moving picture display and have a large contrast ratio, so that images can be realized by using optical anisotropy and polarization of liquid crystals. do.

Such a liquid crystal display device is a liquid crystal panel in which a liquid crystal layer is bonded between a first substrate and a second substrate having an array layer for driving a liquid crystal and a color filter layer for implementing colors. panel) is an essential component, and the transmittance difference is generated by changing the arrangement direction of the liquid crystal molecules through the electric field change between the field generating electrodes formed on the first and second substrates, respectively.

The transmittance difference of the liquid crystal panel is displayed in the form of a color image by reflecting the color combination of the color filter through a back light positioned on the back of the liquid crystal panel.

On the other hand, the lamp included in the backlight unit formed for the backlight supply may be classified into a side light type and a direct type according to the arrangement method.

The light metering type has a merit in that a tubular lamp is installed on the lower side of the liquid crystal panel, and a light guide plate is used to change the path of the light emitted from the lamp to project the entire light on the LCD panel.

The direct type is a method of directly irradiating light toward the front of the liquid crystal panel by arranging a plurality of lamps in a row on the lower surface of the liquid crystal panel. This enables high light efficiency, easy handling, and no limit on the size of the display surface, so that it has been used in large screen liquid crystal display devices of 20 inches or larger.

The liquid crystal panel and the backlight unit are protected from external impact and are modularized with various mechanical elements to prevent light loss.

Hereinafter, a liquid crystal display according to the related art will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a conventional liquid crystal display device.

As shown, the liquid crystal display device includes an upper and lower substrates facing each other, and a liquid crystal layer interposed therebetween, each having a field generating electrode, and a scan signal formed by gate and data lines formed on the lower substrate, respectively. And a liquid crystal panel 10 to which a gate printed circuit board 14 for supplying an image signal and a data printed circuit board 15 are connected.

In more detail, the gate line and the data line cross each other to define a pixel area. A thin film transistor, which is a switching element, is formed in each pixel area, and a red, corresponding to the pixel area, is formed on the upper board. Green and blue color filters are formed repeatedly in sequence.

On the other hand, the back of the liquid crystal panel 10 is configured with a backlight unit 20 for supplying light to the liquid crystal panel 10.

The backlight unit 20 is a direct type, a plurality of elongated cylindrical lamps 24 are arranged side by side at equal intervals, the lower portion of the lamp 24 is a reflective sheet 22 for reflecting the leaked light The upper part of the lamp 24 is configured by stacking a plurality of optical sheets 26 that diffuse light emitted from the lamp 24 and improve a viewing angle.

Here, the lamp 24 is a cold cathode fluorescent lamp (CCFL).

In general, the cold cathode fluorescent lamp has an infinite resistance value before being discharged, whereas the cold cathode fluorescent lamp has a small resistance value due to the plasma of the conductor generated inside the glass tube after discharge. Accordingly, there is a characteristic that the amount of tube current increases by decreasing the resistance value from the initial stage.

For this reason, when driving a plurality of cold cathode fluorescent lamps in parallel, after the initial discharge, a current flows toward the lamp having a small resistance value, and the remaining lamps are not driven.

Therefore, in order to drive a plurality of cold cathode fluorescent lamps, an inverter is used as many as the number of lamps, or it is driven by one or two inverters using a balance PCB equipped with separate parallel connection means.

The balance PCB 34 includes a lamp socket 32 into which a lamp 24 is inserted, parallel connection means (not shown) for distributing the same current to a plurality of lamps 24, and a PCB wiring for electrically connecting them. (Not shown).

Here, the parallel connection means (not shown) is a capacitor, and may be formed on the inverter PCB 35 to be described later.

As shown, both ends of the plurality of lamps 24 are fastened and fixed to the lamp socket 32 mounted on the balance PCB 34, the support side 33 is the upper portion of the balance PCB 34 It consists of a covering form.

The support side 33 is coupled to both side ends of the cover bottom 50 supporting the rear and side surfaces of the backlight unit 20 described above.

In addition, the back of the cover bottom 50 is configured with an inverter unit 70 for supplying power to the plurality of lamps 24, the balance PCB 34 is formed on both side portions of the cover bottom (50) The cover bottom 50 is disposed in the lower portion corresponding to one of the plurality of through the cover bottom 50.

Here, the above-described liquid crystal display device drives a plurality of the lamps 24 in a high-high manner, and the inverter unit 70 has a pair of transformers having different phase differences from each other. The 1st inverter 36a containing is comprised.

In general, in the case of a large-screen liquid crystal display device, since the number of lamps 24 used is large, a method of dividing the entire lamps 24 to be driven by different inverters is used. Accordingly, the inverter unit 70 is configured to be spaced apart from the first inverter 36a and includes a second inverter 36b including another pair of transformers having different phase differences.

In addition, the inverter unit 70 includes a connector 38, which is an electrical connection means, and an inverter PCB 35 mounting them 36a, 36b, 38.

On the other hand, the inverter unit 70 is covered by a cover shield (80). Accordingly, the cover bottom 50 and the cover shield 80 is formed to surround the inverter unit 70 to protect the inverter unit 70 from an external impact, the cover bottom 50 and the cover shield 80 ) Is made of a metal material to function to shield the electromagnetic waves generated from the inverter unit 70.

In addition, the liquid crystal display device as described above includes a rectangular frame-shaped guide panel 30 covering the edges of the liquid crystal panel 10 and the backlight unit 20, and the front edge of the liquid crystal panel 10. It further includes a top frame 40 of the rectangular frame shape coupled to the 30.

2 is a view schematically illustrating a rear structure of a liquid crystal display according to the related art.

As shown in the drawing, the liquid crystal display includes an inverter unit 70 formed at a lower side of the cover bottom 50 with the first balance PCB 34a and the cover bottom 50 interposed therebetween. have.

As described above with reference to FIG. 1, the inverter unit 70 includes a first inverter 36a and a second inverter 36b that divide and drive a plurality of lamps (24 of FIG. 1).

Here, referring to the electrical connection structure between the first to second inverters 36a and 36b and the plurality of lamps (24 of FIG. 1), the first inverter 36a may include the plurality of lamps (24 of FIG. 1). The first wire 41 and the connector 38 connected to the PCB wiring (not shown) to supply power to the lamp (24 of FIG. 1) of the region I of the first balance PCB 34a coupled to one end of the PCB wiring (not shown) so as to supply power to the lamp (24 of FIG. 1) in the region I of the second balance PCB 34b connected to each other and simultaneously coupled with the other ends of the plurality of lamps (24 of FIG. 1). ) Is connected to the second wire 42 and the connector 38 connected to each other.

In addition, the second inverter 36b is configured to supply power to the lamp (24 of FIG. 1) in the region II of the first balance PCB 34a coupled to one end of the plurality of lamps (24 of FIG. 1). II of the second balance PCB 34b connected to a third wire 43 and a connector 38 connected to a wiring (not shown) and simultaneously fastened with other ends of the plurality of lamps (24 of FIG. 1). The fourth wire 44 connected to the PCB wiring (not shown) and the connector 38 are connected to supply the power to the lamp 24 in the region.

At this time, both ends of the first to fourth wires 41 to 44 are provided with a wire connector 38a as a fastening means. Therefore, by connecting the wire connector 38a and the connector 38, the above-described components are interconnected.

As described above, when a plurality of long wires 41 to 44 are used as the electrical connection means for driving the lamp (24 of FIG. 1), not only the appearance quality is deteriorated, but also the wires 41 to 44. The workability for the treatment is lowered, which causes a higher frequency of defects, thereby causing a problem in the reliability of the product.

The present invention is to solve the above problems, forming a PCB wiring to replace a portion of the wire used in the prior art on the first balance PCB having a plurality of lamp sockets are provided with an inverter unit on the back and the lamp is fastened or Or by forming a PCB wiring to replace a portion of the wire used conventionally on the inverter PCB of the inverter unit, it is intended to shorten the overall length of the wire electrically connecting the lamp and the inverter.

In addition, it is an object of the present invention to improve the workability and reliability for the wire treatment.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A plurality of lamps provided on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel; A plurality of lamp sockets into which one end of the lamp is inserted, a substrate on which the plurality of lamp sockets are mounted side by side in a longitudinal direction, a first PCB wiring formed on the substrate to one side of the plurality of lamp sockets, A first balance PCB comprising a second PCB wiring formed on the substrate to the other side of the lamp socket; A plurality of lamp sockets into which the other end of the lamp is inserted, a substrate in which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a third PCB wiring formed on the substrate to one side of the plurality of lamp sockets; A second balance PCB comprising;

An optical sheet and a reflecting sheet provided above and below the lamp; A backlight unit including a support side to cover and fix the first to second balance PCBs; A cover bottom fixing the back and side surfaces of the backlight unit; An inverter unit disposed on the bottom of the cover bottom and positioned below the first balance PCB; A guide panel covering edges of the liquid crystal panel and the backlight unit; A liquid crystal display device including a top case surrounding an edge of the liquid crystal panel is provided.

Here, the lamp is characterized in that the cold cathode fluorescent lamp.

The lamp socket is characterized in that it further comprises a plurality of parallel connection means configured on one side, the parallel connection means is characterized in that the capacitor.

The first PCB wiring and the third PCB wiring are characterized by consisting of two wires, each electrically insulated.

The inverter unit includes an inverter PCB, a first inverter configured on the interleaver PCB, and a second inverter spaced apart from the first inverter, wherein the first to second inverters have different phase differences from each other. It is composed of a pair of transformers, characterized by dividing the plurality of lamps to drive in a high-high manner, respectively.

In addition, one end is connected to the wiring of one of the first PCB wiring of the first balance PCB, the other end is a first wire connected via the first inverter and the connector, and one end is the second balance PCB A second wire connected to one of the third PCB wires, the other end of which is connected to the second PCB wire of the first balance PCB, one end of which is connected to the second PCB wire, and the other end of the first inverter And a third wire connected through a connector, and one end thereof is connected to another wire of the first PCB wiring of the first balance PCB, and the other end thereof is connected to the second inverter and the connector via a fourth wire. The wire and one end is further connected to another wiring of the third PCB wiring of the second balance PCB and the other end further comprises a fifth wire connected via the connector and the second inverter Characterized, in both ends of the first to fifth wire is characterized in that the fastening means are formed of a wire connector.

The present invention also provides a liquid crystal display device comprising: a liquid crystal panel; A plurality of lamps provided on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel; A plurality of lamp sockets into which one end of the lamp is inserted, a substrate on which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a first PCB wiring formed on the substrate to one side of the plurality of lamp sockets A first balance PCB; A plurality of lamp sockets into which the other end of the lamp is inserted, a substrate in which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a second PCB wiring formed on the substrate to one side of the plurality of lamp sockets; A second balance PCB;

An optical sheet and a reflecting sheet provided above and below the lamp; A backlight unit including a support side to cover and fix the first to second balance PCBs; A cover bottom fixing the back and side surfaces of the backlight unit; An inverter PCB disposed below the cover bottom and corresponding to the first balance PCB; a first inverter configured on the inverter PCB; and a second inverter spaced apart from the first inverter; An inverter unit including a third PCB wire mounted on one side of the inverter PCB in a length direction; A guide panel covering edges of the liquid crystal panel and the backlight unit; A liquid crystal display device including a top case surrounding an edge of the liquid crystal panel is provided.

Here, the lamp is characterized in that the cold cathode fluorescent lamp.

The lamp socket is characterized in that it further comprises a plurality of parallel connection means configured on one side, the parallel connection means is characterized in that the capacitor.

The first PCB wiring and the second PCB wiring are characterized by consisting of two wires, each electrically insulated.

Each of the first to second inverters includes a pair of transformers having different phase differences, and the plurality of lamps are divided and driven in a high-high manner.

In addition, one end is connected to the wiring of one of the first PCB wiring of the first balance PCB, the other end is a first wire connected via the first inverter and the connector, and one end is the second balance PCB A second wire connected to one of the second PCB wires, the other end of which is connected to the third PCB wires and a connector of the inverter PCB, and one end of which is another one of the first PCB wires of the first balance PCB; A third wire connected to one wire and the other end connected to a second inverter and a connector, and one end connected to another wire of the second PCB wiring of the second balance PCB, and the other end of the It further comprises a fourth wire connected via a second inverter and a connector, characterized in that the wire connector as a fastening means is formed at both ends of the first to fourth wires, Group and the first inverter PCB wiring claim 3 is characterized in that directly to the intermediate connector.

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

- First Embodiment -

3 is an exploded perspective view of a liquid crystal display according to a first exemplary embodiment of the present invention, and FIG. 4 is a plan view schematically illustrating a structure of a balance PCB coupled to both ends of a lamp according to the first exemplary embodiment of the present invention. .

As shown, the liquid crystal display according to the exemplary embodiment of the present invention includes an upper and lower substrates facing each other, and a liquid crystal layer interposed therebetween, each having an electric field generating electrode, and a gate wiring formed on the lower substrate. And a liquid crystal panel 110 to which a gate printed circuit board 114 and a data printed circuit board 115 which supply scan signals and image signals, respectively, are connected to each other.

In more detail, the gate line and the data line cross each other to define a pixel area. A thin film transistor, which is a switching element, is formed in each pixel area, and a red, corresponding to the pixel area, is formed on the upper board. Green and blue color filters are formed repeatedly in sequence.

On the other hand, the back of the liquid crystal panel 110 is configured with a backlight unit 120 for supplying light to the liquid crystal panel 110.

The backlight unit 120 is a direct type, a plurality of elongated cylindrical lamps 124 are arranged side by side at equal intervals, the lower portion of the lamp 124 is a reflective sheet 122 for reflecting the leaked light A plurality of optical sheets 126 for diffusing light emitted from the lamp 124 and improving a viewing angle are stacked on the lamp 124.

Here, the lamp 124 is a cold cathode fluorescent lamp.

The liquid crystal display device includes a rectangular frame-shaped guide panel 130 covering the edges of the liquid crystal panel 110 and the backlight unit 120, and a cover bottom 150 supporting side and rear surfaces of the backlight unit 120. And, it is modularized by the top frame 140 of the rectangular frame shape coupled to the front edge of the liquid crystal panel 110 and coupled with the guide panel 130 and various coupling members (not shown) for coupling them.

When the lamp 124 fastening structure of the backlight unit 120 is described in detail with reference to FIG. 4, one end of the plurality of lamps 124 is fastened to the first balance PCB 134a, and the other end thereof is the second balance. It is fastened to the PCB 134b.

The first balance PCB 134a has a lamp socket 132 into which one end of the lamp 124 is inserted is soldered side by side in the longitudinal direction of the substrate 131, and the lamp socket 132 The first PCB wiring 139a is formed in the longitudinal direction on the substrate 131 at the lamp insertion part side of the back side.

In addition, on the other side of the lamp socket 132, a second PCB wiring 139b corresponds to the first PCB wiring 139a and is formed in the length direction on the substrate 131.

In addition, the second balance PCB 134b has a lamp socket 132 into which the other end of the lamp 124 is inserted is soldered side by side in the longitudinal direction of the substrate 131. The third PCB wiring 139c is formed on the substrate 131 in the longitudinal direction at the lamp insertion portion of the socket 132.

Here, the first PCB wiring 139a and the third PCB wiring 139c are each composed of two wires that are electrically insulated, and although not shown, the first to third PCB wirings 139a to 139c may be formed. At the end, a connector for connecting wires connected to the inverters 136a and 136b is provided, respectively, between the lamp socket 132 of the first balance PCB 134a and the first PCB wiring 139a, and the second A capacitor is provided between the lamp socket 132 of the balance PCB 134b and the third PCB wiring 139c as parallel connection means for distributing the power supplied from the inverters 136a and 136b to the same level.

Referring to FIG. 3 again, the support side 133 is covered with the first balance PCB 134a and the second balance PCB 134b.

The support side 133 is coupled to both side ends of the cover bottom 150 supporting the rear and side surfaces of the backlight unit 120 described above.

In addition, the back of the cover bottom 150 is configured with an inverter unit 170 for supplying power to the plurality of lamps 124, the first balance PCB is formed on one side of the cover bottom 150 The cover bottom 150 is disposed in the lower portion 134a.

Here, the above-described liquid crystal display device drives a plurality of the lamps 124 in a high-high manner, and the inverter unit 170 includes a first inverter 136a including a pair of transformers having different phase differences. Is composed.

In general, in the case of a large-screen liquid crystal display device, since the number of lamps 124 used is large, a method of dividing the entire lamps 124 and driving them with different inverters is used.

Accordingly, the inverter unit 170 is configured to be spaced apart from the first inverter 136a and includes a second inverter 136b including another pair of transformers having different phase differences.

In addition, the inverter unit 170 includes a connector 138 which is an electrical connection means and an inverter PCB 135 for mounting them 136a, 136b, 138.

Meanwhile, the inverter unit 170 is covered by the cover shield 180. Accordingly, the cover bottom 150 and the cover shield 180 are formed to surround the inverter unit 170 to protect the inverter unit 170 from an external shock, and the cover bottom 150 and the cover shield 180 ) Is made of a metal material to function to shield the electromagnetic waves generated from the inverter unit 170.

5 is a diagram schematically illustrating a rear structure of a liquid crystal display according to a first embodiment of the present invention.

As shown in the figure, the inverter unit 170 is configured at a position corresponding to the first balance PCB 134a on one side of the bottom of the cover bottom 150.

As described above with reference to FIG. 3, the inverter unit 170 includes a first inverter 136a and a second inverter 136b that divide and drive a plurality of lamps 124 of FIG. 3.

Here, referring to the electrical connection structure between the first to second inverters 136a and 136b and the plurality of lamps 124 of FIG. 3, the first inverter 136a may include the plurality of lamps 124 of FIG. 3. A first wire connected to one of the first PCB wirings (139a of FIG. 4) to supply power to the lamp (124 of FIG. 3) of the region I of the first balance PCB 134a which is coupled to one end of the 141 and the lamp of the region I (124 of FIG. 3) of the second balance PCB 134b connected to one end of the plurality of lamps (124 of FIG. 3) at the same time. A second wire 142 connected to one of the third PCB wirings (139c in FIG. 4), a second PCB wiring 139b connected thereto and a connector 138, and connected thereto to supply power to the circuit board The third wire 143 and the connector 138 are connected via the medium.

In addition, the second inverter 136b is configured to supply power to the lamp (124 in FIG. 3) of the region II of the first balance PCB 134a fastened to one end of the plurality of lamps (124 in FIG. 3). A fourth wire 144 and a connector 138, which are connected to another one of the first PCB wirings (139a of FIG. 4), are connected via a connector, and at the same time, the other side of the plurality of lamps (124 of FIG. 3). A fifth wire connected to another one of the third PCB wirings (139c of FIG. 4) to supply power to the lamp (124 of FIG. 3) of the region II of the second balance PCB 134b fastened to the end. 145 and the connector 138 are connected via a medium.

At this time, both ends of the first to fifth wires 141 to 145 are provided with a wire connector 138a as a fastening means. Thus, by coupling the wire connector 138a and the fixed connector 138, the above-described components are interconnected.

That is, by replacing part of the conventional second wire (42 in FIG. 2) with the second PCB wiring 139b formed on the first balance PCB 134a, the lamp (124 in FIG. 3) and the inverter ( It is possible to shorten the length of the entire wires 141 to 145 that electrically connect the 136a and 136b.

As a result, the material cost can be reduced, and workability for processing the wires 141 to 145 can be improved.

- Second Embodiment -

6 is a diagram schematically illustrating a rear structure of a liquid crystal display according to a second exemplary embodiment of the present invention.

Here, since the basic structure and lamp driving principle of the liquid crystal display according to the second embodiment of the present invention are the same as those of the first embodiment of the present invention, description thereof will be omitted.

As shown in the figure, the inverter unit 270 is configured at a position corresponding to the first balance PCB 234a on one side of the bottom of the cover bottom 250.

The inverter unit 270 may be mounted on the first inverter 236a formed on the inverter PCB 235, the second inverter 236b spaced apart from each other, and one side of the inverter PCB 235 in the longitudinal direction. The third PCB wiring 239 and a plurality of connectors 238 which are electrical fastening means are included.

Looking at the electrical connection structure between the first to second inverters 236a and 236b and a plurality of lamps (not shown), the first inverter 236a is coupled to one end of the plurality of lamps (not shown). Via the first wire 241 and the connector 238 connected to the wiring of one of the first PCB wiring (not shown) to supply power to the lamp (not shown) in the region I of the first balance PCB 234a. One of the second PCB wirings (not shown) connected to and supplying power to the lamps (not shown) in the region I of the second balance PCB 234b connected to the other ends of the plurality of lamps (not shown) at the same time. The second wire 242 is connected to the wiring and the third PCB wiring 239 connected to the connector 238 via it.

In addition, the second inverter 236b is connected to the first PCB wiring to supply power to a lamp (not shown) in the region II of the first balance PCB 234a coupled to one end of the plurality of lamps (not shown). A second balance PCB connected through a third wire 243 and a connector 238 connected to another one of the wires (not shown) and simultaneously fastened with other ends of the plurality of lamps (not shown). A fourth wire 244 connected to another one of the second PCB wirings (not shown) and a connector 238 are connected to supply power to a lamp (not shown) in the region II of 234b. Structure.

At this time, both ends of the first to fourth wires 241 to 244 are provided with a wire connector 238a as a fastening means. Therefore, the wire connector 238a and the fixed connector 238 are coupled to each other, thereby interconnecting the above-described components.

That is, by replacing part of the conventional second wire (42 in FIG. 2) with the third PCB wiring 239 formed on the inverter PCB 235, the lamp (not shown) and the inverters 236a and 236b. It is possible to shorten the length of the entire wire (241 to 244) to electrically connect the.

As a result, the material cost can be reduced, and workability for processing the wires 241 to 244 can be improved.

Although the above has been described with reference to the first to second preferred embodiments of the present invention, those skilled in the art will appreciate the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that various modifications and changes can be made.

As described above, the present invention forms a PCB wiring to replace a portion of the wire used in the prior art on the first balance PCB having a plurality of lamp sockets that are provided with the inverter portion and the lamp is fastened to the rear or inverter of the inverter portion By forming a PCB wiring to replace a part of the wire used in the prior art on the PCB, it is effective to shorten the overall length of the wire electrically connecting the lamp and the inverter, thereby reducing the manufacturing cost of the liquid crystal display device There is.

In addition, the present invention has the effect of improving the workability and reliability for the wire treatment.

Claims (20)

A liquid crystal panel; A plurality of lamps provided on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel; A plurality of lamp sockets into which one end of the lamp is inserted, a substrate on which the plurality of lamp sockets are mounted side by side in a longitudinal direction, a first PCB wiring formed on the substrate to one side of the plurality of lamp sockets, A first balance PCB comprising a second PCB wiring formed on the substrate to the other side of the lamp socket; A plurality of lamp sockets into which the other end of the lamp is inserted, a substrate in which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a third PCB wiring formed on the substrate to one side of the plurality of lamp sockets; A second balance PCB comprising; An optical sheet and a reflecting sheet provided above and below the lamp; A backlight unit including a support side to cover and fix the first to second balance PCBs; A cover bottom fixing the back and side surfaces of the backlight unit; An inverter unit disposed on the bottom of the cover bottom and positioned below the first balance PCB; A guide panel covering edges of the liquid crystal panel and the backlight unit; Top case surrounding the edge of the liquid crystal panel Including, One end of the lamp and the first PCB wiring are electrically connected to each other, The other end of the lamp and the third PCB wiring are electrically connected to each other, The inverter unit, Power is supplied to some of the lamps through the first PCB wiring and the third PCB wiring; And a power supply to the remaining of the lamps through the third PCB wiring electrically connected to the first PCB wiring and the second PCB wiring. The method of claim 1, And said lamp is a cold cathode fluorescent lamp. The method of claim 1, The lamp socket further comprises a plurality of parallel connection means configured on one side. The method of claim 3, wherein The parallel connection means is a liquid crystal display, characterized in that the capacitor. The method of claim 1, And the first PCB wire and the third PCB wire are each composed of two wires electrically insulated from each other. The method of claim 1, The inverter unit includes an inverter PCB, a first inverter configured on the inverter PCB, and a second inverter configured to be spaced apart from the first inverter. The method of claim 6, And the first inverter and the second inverter each comprise a pair of transformers having different phase differences. The method of claim 7, wherein And the first inverter and the second inverter divide the plurality of lamps and drive each of them in a high-high manner. The method of claim 6, One end is connected to the wiring of one of the first PCB wiring of the first balance PCB, the other end is a first wire connected via the connector and the first inverter, one end is the third of the second balance PCB A second wire connected to one of the PCB wirings, the other end of which is connected to the second PCB wiring of the first balance PCB, one end of which is connected to the second PCB wiring, and the other end of which is connected to the first inverter and the connector. A third wire connected via a second end, and one end of which is connected to another one of the first PCB wirings of the first balance PCB, and the other end of which is connected to the second inverter and a fourth wire connected through a connector. And one end thereof is further connected to another one of the third PCB wirings of the second balance PCB, and the other end thereof further comprises a fifth wire connected to the second inverter and a connector. A liquid crystal display device. The method of claim 9, Both ends of the first to fifth wires are provided with a wire connector as a fastening means. A liquid crystal panel; A plurality of lamps provided on a rear surface of the liquid crystal panel to supply light to the liquid crystal panel; A plurality of lamp sockets into which one end of the lamp is inserted, a substrate on which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a first PCB wiring formed on the substrate to one side of the plurality of lamp sockets A first balance PCB; A plurality of lamp sockets into which the other end of the lamp is inserted, a substrate in which the plurality of lamp sockets are mounted side by side in a longitudinal direction, and a second PCB wiring formed on the substrate to one side of the plurality of lamp sockets; A second balance PCB; An optical sheet and a reflecting sheet provided above and below the lamp; A backlight unit including a support side to cover and fix the first to second balance PCBs; A cover bottom fixing the back and side surfaces of the backlight unit; An inverter PCB disposed below the cover bottom and corresponding to the first balance PCB; a first inverter configured on the inverter PCB; and a second inverter spaced apart from the first inverter; An inverter unit including a third PCB wire mounted on one side of the inverter PCB in a length direction; A guide panel covering edges of the liquid crystal panel and the backlight unit; Top case surrounding the edge of the liquid crystal panel Including, One end of the lamp and the first PCB wiring are electrically connected to each other, The other end of the lamp and the second PCB wiring are electrically connected to each other, The inverter unit, Power is supplied to some of the lamps through the first PCB wiring and the second PCB wiring; And supplying power to the remaining of the lamps through the second PCB wiring electrically connected to the first PCB wiring and the third PCB wiring. The method of claim 11, And said lamp is a cold cathode fluorescent lamp. The method of claim 11, The lamp socket further comprises a plurality of parallel connection means configured on one side. 14. The method of claim 13, The parallel connection means is a liquid crystal display, characterized in that the capacitor. The method of claim 11, And the first PCB wiring and the second PCB wiring are each composed of two electrically insulated wires. The method of claim 11, And the first to second inverters each comprise a pair of transformers having different phase differences. The method of claim 11, And the first to second inverters divide the plurality of lamps and drive each of them in a high-high manner. The method of claim 11, One end thereof is connected to one of the first PCB wirings of the first balance PCB, and the other end thereof is a first wire connected via the first inverter and a connector, and one end thereof is the second of the second balance PCB. A second wire connected to one of the PCB wirings, the other end of which is connected to the third PCB wiring and the connector of the inverter PCB, and one end of which is the other one of the first PCB wirings of the first balance PCB. A third wire connected to the wiring and the other end connected to the second inverter and the connector, and one end connected to another wire of the second PCB wiring of the second balance PCB, and the other end connected to the second inverter. And a fourth wire connected through the connector. The method of claim 18, Liquid crystal display device characterized in that the wire connector as a fastening means is provided at both ends of the first to fourth wires. The method of claim 18, And the first inverter and the third PCB wiring are directly connected through a connector.

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