KR20080059033A - Liquid crystal display module - Google Patents

Abstract

An LCD(Liquid Crystal Display) module is provided to connect a plurality of fluorescent lamps with an inverter through a single wire to reduce the number of wires and prevent leakage current. An LCD module includes a cover bottom(160), a printed circuit board(180), a plurality of fluorescent lamps(172), a conductive line, and an inverter(140). The printed circuit board is formed at one side of the front face of the cover bottom in a first direction. The fluorescent lamps are arranged in a direction perpendicular to the first direction. The conductive line is formed on the circuit board and connected to one end of each of the fluorescent lamps. The inverter is disposed on the backside of the cover bottom and connected to the wire through a hole(162) penetrating the cover bottom.

Description

Liquid crystal display module

The present invention relates to a liquid crystal display device, and more particularly, in a direct type liquid crystal display device having a plurality of backlight lamps, the connection structure of the plurality of fluorescent lamps and the inverter is further simplified.

Recently, various types of flat panel displays (FPDs), which have advantages of thinning, light weight, and low power consumption, have been proposed. Among the flat panel display devices (FPDs), which are attracting attention, are filled in the space between the upper and lower substrates. PDP (Plasma Display Panel) for realizing the screen with the principle that ultraviolet rays emitted from the gas (Ne, Xe) collide with the phosphor and emit inherent visible light, and the image is generated through phosphor emission by ultraviolet rays generated during gas discharge. In addition, an electric field is formed in the liquid crystal injected between the upper and lower substrates spaced apart by a predetermined distance, and light is incident on the backlight unit to control the light transmitted to the pixel according to the signal voltage of the pixel. An organic light emitting material is inserted between a thin film transistor (TFT-LCD), a glass substrate on which a transparent electrode is formed, and a metal cathode. And an organic electroluminescent display device for generating an image by emitting organic molecules by flowing a current.

Among the above-described flat panel display devices, in particular, the liquid crystal display device is advantageous in thinning and reducing weight, and has many advantages due to the advantages of low power consumption and low voltage operation.

The image realization principle of the liquid crystal display device uses the optical anisotropy and polarization property of the liquid crystal material. The liquid crystal has a thin and long molecular structure and when placed in an anisotropy and an electric field having an orientation in the array, the direction of the molecular array changes according to its size. It is polarized. The liquid crystal display device is a liquid crystal panel composed of a pair of transparent insulating substrates, each having a liquid crystal layer interposed therebetween and having a field generating electrode, as an essential component. The arrangement direction of the molecules is artificially adjusted, and various images are displayed by using the light transmittance which is changed at this time.

Since the liquid crystal panel does not have a light emitting element, and thus requires a separate light source, as described above, an image having a identifiable luminance is realized by receiving light through a backlight unit provided on the rear surface. According to the arrangement method of the fluorescent lamp included in the backlight unit, a side light type or a liquid crystal panel which refracts the light of the fluorescent lamp disposed at one side edge of the liquid crystal panel with the light guide plate and enters the front of the liquid crystal panel. By arranging a plurality of fluorescent lamps on the back side can be divided into a direct type (direct type) for supplying light directly over the entire liquid crystal panel.

The metering type liquid crystal display device has a merit that it is easy to manufacture by installing a tubular fluorescent lamp on the side of the liquid crystal panel and projecting light from the lamp to the entire liquid crystal panel screen using a transparent light guide plate.

In addition, the direct type liquid crystal display device has a high uniformity of light by arranging a plurality of fluorescent lamps in a row on the lower surface of the diffusion plate and directs the light toward the front side of the liquid crystal panel, which is advantageous to apply to a large liquid crystal display device. .

Here, the backlight unit of the direct type liquid crystal display device does not require a light guide plate because light is directly irradiated to the entire surface of the substrate, and a plurality of backlight lamps are available, so that the light utilization rate is high, the handling is simple, and the size of the display surface is increased. Since there is no limitation, it is used for the large screen liquid crystal display device of 20 inches or more.

In addition, the liquid crystal panel and the backlight lamp are modularized with various mechanical elements for protection from external impact and prevention of light loss.

1 is an exploded perspective view schematically showing a liquid crystal display module having a conventional direct type backlight unit.

As shown, the liquid crystal display module having a direct backlight unit includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a top case 40, and a cover bottom 50. And an inverter unit 70 and a cover shield 80.

The liquid crystal panel 10 is configured to include a liquid crystal layer spaced apart a predetermined distance, and injected between the upper and lower substrates facing each other. Among them, a thin film transistor, which is a switching element, is positioned on a lower substrate, and a color filter is positioned on an upper substrate, thereby displaying an image by turn-on / off driving of the thin film transistor. In addition, the liquid crystal panel 10 is connected to a gate and a data printed circuit board 15 for supplying a scan signal and an image signal to the liquid crystal panel 10.

The backlight unit 20 positioned at the rear of the liquid crystal panel 10 to supply light is a direct type in which a plurality of fluorescent lamps 24 are used, and a reflective sheet 22 is positioned below the fluorescent lamp 24. At both ends, the support side 33 supports the fluorescent lamp 24, and a plurality of optical sheets 26 are stacked on the upper side.

More specifically, both side ends of the fluorescent lamp 24 is fitted with the lamp holder 32, the lamp holder 32 is inserted into the opening of the support side 33, the support side 33 is the cover bottom 50 ) And both side ends of the

In addition, a wire (not shown) connected to an external power source is connected to one end of each fluorescent lamp 24, and the wire (not shown) extends to the back of the cover bottom 50, and one end of the inverter PCB ( It is connected to the connector 38 of the inverter unit 70 formed on the 35.

The liquid crystal panel 10 and the backlight unit 20 are seated on the support main 30, and the support main 30 prevents and supports the flow of the liquid crystal panel 10 and the backlight unit 20.

The top case 40 covers the upper edge of the liquid crystal panel 10 and the side surfaces of the support main 30 to support and protect the edges of the liquid crystal panel 10 and the side surfaces of the support main 30.

The cover bottom 50 covers the lower portion of the support main 40 to protect the lower portion of the liquid crystal display device described above. The cover bottom 50 is fastened through the support main 30, the top case 40 and the fastening means (not shown) and modularized.

In addition, an inverter unit 70 is provided below the cover bottom 50 to supply power to the fluorescent lamp 24, and the inverter unit 70 is connected to a plurality of inverters 60 and the fluorescent lamp 24. Connector 38, which is a means, and an inverter PCB 35 for mounting it.

The inverter unit 70 is covered by the cover shield (80). Accordingly, the cover bottom 50 and the cover shield 80 surrounds the inverter unit 70 to protect the inverter unit 70 from external shock, and additionally, 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.

As described above, the inverter unit 70 includes an inverter 60, which may be the same number or greater than that depending on the driving scheme of the fluorescent lamp 24. The inverter 60 is mounted on the inverter PCB 35 in the direction of the cover shield 80 (that is, the rear side) on the inverter PCB 35 and coupled to the same fastening means together with the cover shield 80.

The inverter unit 70 converts the power supplied from the external power supply unit and supplies the converted power to the fluorescent lamp 24.

FIG. 2 is a view schematically illustrating a structure of a rear surface of the liquid crystal display module of FIG. 1.

At this time, the figure shows an example of a high-high (high-high) system in which the inverter unit at both ends of the fluorescent lamp. As shown, a plurality of fluorescent lamps (24 of FIG. 1), the high-voltage AC waveform is applied to the electrode through the wire 36 connected to the electrode configured at one end to emit light.

In this high-high scheme, at least two fluorescent lamps (24 of FIG. 1) are provided in pairs, and one end thereof is electrically connected to the inverter unit 70 through a wire 36 connected to the socket connector 38a. Is connected.

In order to drive the fluorescent lamp 24 of FIG. 1, since an AC voltage high voltage is required, an inverter 60 that receives and converts a DC voltage low voltage is an essential component.

Accordingly, since the inverter 60 (35) in which the inverter 60 is mounted is provided separately, and the inverter 60 generates a large amount of heat, in general, the designer may design the outside of the modular liquid crystal display, in particular, the cover bottom 50. ) Will be mounted on the back. On the inverter PCB 35, a plug connector 38b for connecting with the socket connector 38a is configured, and the two are electrically connected to the fluorescent lamp 24 of FIG.

As described above, the inverter unit (70 in FIG. 1) for driving the plurality of fluorescent lamps (24 in FIG. 1) is provided as the back of the cover bottom 50, occupies most of the back space of the liquid crystal display module. This results in an increase in the thickness of the liquid crystal display module.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a first object of the present invention is to provide a backlight unit capable of efficient space utilization by forming a circuit board (PCB or balance PCB) for connecting fluorescent lamps in parallel on the inner surface of the cover bottom. do.

In addition, the number of lamps and the number of wires for the connection to the inverter and the number of lamps provided in parallel by connecting the lamp sockets coupled to a plurality of fluorescent lamps in parallel, the cover of the first hole and the corresponding position of one end of the circuit board The second object is to prevent current leakage by connecting the wire through the bottom second hole.

In addition, a third object of the present invention is to shorten the process time by eliminating the soldering process to connect the plurality of fluorescent lamps and the plurality of wires to each other.

Further, a fourth object is to make the most of the extra space of the liquid crystal display module by mounting the balance PCB in the support side.

In addition, in the high-high method in which the inverters are connected to both sides of the lamp, a hole for connecting the inverter and the lamp is formed on one side of the cover bottom, so that only one inverter unit is configured, simplifying the manufacturing process and manufacturing cost. The fifth purpose is to reduce the

In addition, the present invention, the drive power of the fluorescent lamp is supplied from the external system is provided on the back of the liquid crystal display module, the inverter PCB mounted on the back of the cover bottom, eliminating the inverter PCB and the cover shield to protect it Accordingly, a sixth object of the present invention is to provide a liquid crystal display module that utilizes the rear space of the cover bottom and reduces the thickness thereof.

The present invention and the cover bottom to solve the above problems; A first circuit board formed at one side end of the front surface of the cover bottom in a first direction; A plurality of fluorescent lamps having one end disposed on the first circuit board and arranged perpendicular to the first direction; A first wiring formed on the first circuit board and connected to one end of each of the plurality of fluorescent lamps; The present invention provides a backlight unit for a liquid crystal display device including a first inverter part disposed on a rear surface of the cover bottom and including a first inverter connected to the first wire through a first hole passing through the cover bottom.

In addition, the present invention and the liquid crystal panel; A first circuit board configured to supply light to the liquid crystal panel, a cover bottom, a first circuit board formed at one side end of the front surface of the cover bottom in a first direction, and one end of the first printed circuit board; A plurality of fluorescent lamps arranged perpendicularly to one direction, first wirings formed on the first circuit board and connected to one end of each of the plurality of fluorescent lamps, located on a rear surface of the cover bottom, and the cover bottom A backlight unit including an inverter connected to the first wire through a first hole penetrating through the first hole; A power supply unit is provided to the liquid crystal panel and includes a power supply unit formed on a rear surface of the cover bottom, and the inverter provides a liquid crystal display module positioned on the power supply unit.

According to an exemplary embodiment of the present invention, a liquid crystal display module including a backlight unit includes a circuit board on a front surface of a cover bottom, in which a lamp socket into which a plurality of fluorescent lamps are inserted is connected in parallel, and a hole penetrating through the cover bottom. By connecting to the inverter formed on the back of the cover bottom through, a plurality of fluorescent lamps and the inverter can be connected through a single wire.

In addition, by connecting the lamp sockets in parallel to reduce the number of inverters and wires for connection with the number of lamps, and the first hole of one end of the balance PCB and the second hole of the cover bottom of the corresponding position By connecting the wire through, it is possible to prevent leakage of current.

In addition, by providing a balancing unit for distributing current to a plurality of fluorescent lamps consisting of cold cathode fluorescent lamps (CCFL) on the circuit board, efficient lamp driving is possible without additional configuration.

In the high-high backlight unit, the both ends of the fluorescent lamp are efficiently connected to one inverter unit, thereby simplifying the structure and reducing the manufacturing cost.

In addition, a process of soldering each of the plurality of fluorescent lamps and the plurality of wires to each other may be omitted, thereby reducing the process time.

In addition, by mounting the circuit board (PCB or balance PCB) in the empty space of the support side, the extra space of the liquid crystal display device module can be utilized to the maximum.

In addition, the liquid crystal display module according to the embodiment of the present invention has an effect of omitting a separate inverter PCB by forming an inverter in a power supply unit for supplying power to the liquid crystal panel, thereby reducing the thickness of the liquid crystal display module.

Hereinafter, a liquid crystal display module according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

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

The liquid crystal display module according to the embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120, a support main 130, a top case 135, a cover bottom 160, and an inverter unit ( 140 and a cover shield 150.

The liquid crystal panel 110 is configured to include a liquid crystal layer spaced apart a predetermined distance, and injected between the upper and lower substrates facing each other. Among them, a thin film transistor, which is a switching element, is positioned on a lower substrate, and a color filter is positioned on an upper substrate, thereby displaying an image by turning on / off driving of the thin film transistor. In addition, the liquid crystal panel 110 is connected to a gate and a data printed circuit board 115 for supplying a scan signal and an image signal to the liquid crystal panel 110.

The backlight unit 120 positioned at the rear of the liquid crystal panel 110 and supplying light uses a direct type. A plurality of fluorescent lamps 172 are disposed in parallel on the cover bottom 160 as a light source. The reflective sheet 170 is positioned between the fluorescent lamp 172 and the cover bottom 160, and the support side 176 covers both ends of the fluorescent lamp 172 at both side ends. The support side 176 includes a plurality of openings 178, through which the end of the fluorescent lamp 172 exits. In addition, a plurality of optical sheets 125 are stacked on the fluorescent lamp 172.

In addition, first and second printed circuit boards (PCBs) 180a and 180b are formed at both side ends of the cover bottom 160. Lamp sockets 174 on which the ends of the fluorescent lamps 172 are fitted are formed on the first and second PCBs 180a and 180b to support the fluorescent lamps 172. The lampholder 174 is soldered onto the first and second PCBs 180a and 180b and connected to the first and second PCBs 180a and 180b.

In the drawing, since the backlight unit 120 driven in a high-high manner is disclosed, PCBs are formed at both ends of the fluorescent lamp 172 and are respectively connected to inverters disposed on the rear surface of the cover bottom 160. When driven in a high-low manner, one side of the fluorescent lamp is connected to the inverter through the PCB while the other side is grounded.

Referring to FIG. 4, which is a cross-sectional view showing the inside of the support side in the liquid crystal display module having the backlight lamp according to the embodiment of the present invention, the PCB 180 covers the cover bottom 160 to the outside of the reflective sheet 170. The support side 176 is coupled to the cover bottom 160 in a form that completely covers the lampholder 174 and the PCB 180. At this time, the support side 176 includes a plurality of openings 178, through which the fluorescent lamp 172 exits.

Referring back to FIG. 3, the liquid crystal panel 110 and the backlight unit 120 are seated on the support main 130, and the support main 130 prevents the liquid crystal panel 110 and the backlight unit 120 from flowing. And support.

The top case 135 covers and protects the edge of the liquid crystal panel 110 and the side of the support main 130 by covering the upper edge of the liquid crystal panel 110 and the side of the support main 130.

The cover bottom 160 covers the lower portion of the support main 130 to protect the lower components of the liquid crystal display. The cover bottom 160 is fastened through the support main 130, the top case 135, and a fastening means (not shown) to be modularized.

In addition, the lower portion of the cover bottom 160, the inverter unit 140 for supplying power to the fluorescent lamp 172 is located, the inverter unit 140 is a plug which is a connection means between the inverter 144 and the fluorescent lamp 172 The connector 146 and an inverter PCB 142 for mounting the connector 146.

The inverter unit 140 is covered by the cover shield 150. Accordingly, the cover bottom 160 and the cover shield 150 surround the inverter unit 140 to protect the inverter unit 140 from external shock, and additionally, the cover bottom 160 and the cover shield 150 ) Is made of a metal material to function to shield the electromagnetic waves generated from the inverter unit 140.

In the inverter unit 140, the inverter 144 is mounted on the inverter PCB 142 in the direction of the cover shield 150 (that is, the rear surface of the cover bottom 160), and the inverter PCB 142 is the cover shield. It is coupled to the same fastening means (not shown) together with the 150. The inverter unit 140 having such a configuration supplies power supplied from an external power supply unit to the fluorescent lamp 172.

In addition, each end of the fluorescent lamp 172 is connected to the inverter 144 through a wire 186. Here, the wire 186 is connected to the first or second PCBs 180a and 180b, and the back surface of the cover bottom 160, that is, the inverter unit 140, is formed through the hole 162 formed in the cover bottom 160. Extends. The wire 186 is electrically connected to the inverter 144 by being connected to the plug connector 146 of the inverter unit 140. In addition, since each of the first or second PCBs 180a and 180b is connected to an end of the fluorescent lamp 172, the wire 186 is connected to the fluorescent lamp 172 through the first or second PCBs 180a and 180b. ) Will be connected. Thus, the fluorescent lamp 172 is configured to be connected to the inverter 144 through the PCB (180a, 180b), the wire 186 and the plug connector 146.

As described above, the inverter unit 140 includes an inverter 144. In general, the number of inverters is the same as the number of fluorescent lamps, whereas in the LCD module according to the embodiment of the present invention, the fluorescent lamps 172 The number of inverters 144 less than the number of will be provided. This eliminates the need for a plurality of wires connecting the fluorescent lamp 172 and the inverter 144, respectively, and connects the fluorescent lamp 172 to the PCB 180, and the PCB 180 and one or at least one fluorescent lamp ( By connecting fewer inverters 144 through wires 186 than the number of wires 172 can reduce the number of wires required. In addition, since the wire 186 extends to the rear surface through the hole 162 of the cover bottom 160 without being exposed to the outside, it does not cause a problem such as current leakage by the exposed wire.

In addition, as described above, by mounting the PCB 180 to the empty space of the support side 176, and placed it in front of the cover bottom 160, while utilizing the limited space of the liquid crystal display device module to the maximum and the thickness thereof Can be reduced.

5A and 5B are perspective views illustrating a PCB according to an embodiment of the present invention, respectively.

As shown in FIG. 5A, a plurality of lamp sockets 174a are arranged in a row on the PCB 180 positioned at the side end of the cover bottom (160 in FIG. 3) and connected in parallel with each lamp socket 174a. PCB wiring 182 is formed. In addition, holes 184 are formed corresponding to the PCB wiring 182. The hole 184 has a position corresponding to the hole 162 of FIG. 3 formed in the cover bottom 160 of FIG. 3. The lamp socket 174a has a guide groove 175a, and an end of the fluorescent lamp 172 of FIG. 3 is inserted along the guide groove 175a to be electrically connected to the lamp socket 174a. Since the lamp socket 174a is connected to the PCB wiring 182, the end of the fluorescent lamp 172 of FIG. 3 is connected to the PCB wiring 182 through the lamp socket 174a.

The fluorescent lamp 172 of FIG. 3 coupled to the PCB 180 illustrated in FIG. 5A is a cold cathode fluorescent lamp CCFL, and a balancing unit for distributing current in parallel to the fluorescent lamp CC 172 of FIG. 181 is formed on the PCB 180. In case of a direct backlight unit using CCFL, when a plurality of CCFL fluorescent lamps (172 of FIG. 3) are driven in parallel using one inverter, only a part of the plurality of lamps are driven by the discharge characteristics of the CCFL. , The balancing unit 181 is to prevent this. The balancing unit 181 may be a capacitor in view of occupied area and cost. In addition, when driven in a high-high manner, both side ends of the fluorescent lamp (172 of FIG. 3) are fitted into the plurality of lamp sockets 174a, and the lamp sockets 174a are soldered onto the PCB 180 so that the fluorescent lamps ( 172 of FIG. 3 is electrically connected to the PCB 180. The balancing unit 181 is connected to each of the plurality of lamp sockets 174a to supply the high voltage of the AC waveform supplied from the inverter unit 140 of FIG. 3 to the plurality of fluorescent lamps 172.

Next, as shown in FIG. 5B, a plurality of lamp sockets 174a are arranged in a line on the PCB 180 located at the side end of the cover bottom (160 in FIG. 3) and parallel to each lamp socket 174b. The PCB wiring 182 to be connected is formed. In addition, holes 184 are formed corresponding to the PCB wiring 182. The hole 184 has a position corresponding to the hole 162 of FIG. 3 formed in the cover bottom 160 of FIG. 3. The lamp socket 174b has a guide groove 175b, and an end of the fluorescent lamp 172 of FIG. 3 is inserted along the guide groove 175b to be electrically connected to the lamp socket 174b. Since the lamp socket 174b is connected to the PCB wiring 182, the end of the fluorescent lamp 172 of FIG. 3 is connected to the PCB wiring 182 through the lamp socket 174b.

In this case, the fluorescent lamp 172 of FIG. 3 is an external electrode fluorescent lamp (EEFL), and in the case of the EEFL, a balancing unit (181 of FIG. 5A) for parallel driving is required as in the CCFL described with reference to FIG. 5A. Do not

6 is a schematic perspective view of a rear cover bottom of the backlight unit according to an exemplary embodiment of the present invention.

First, referring to FIG. 3, first and second holes (not shown) are formed on the first and second PCBs 180a and 180b corresponding to PCB wirings (182 of FIGS. 5A and 5B), respectively.

Referring to FIG. 6, both sides of the bottom of the cover bottom 160 correspond to the first and second holes (not shown) formed in the first and second PCBs (180a and 180b of FIG. 3). Fourth holes 162a and 162b are formed. The wire 186 of FIG. 3 is inserted through the first and third holes 162a and is connected to the first PCB (180a of FIG. 3) and extends to the rear surface of the cover bottom 160, and another wire Is inserted through the second and fourth holes 162b and is connected to the second PCB (180b of FIG. 3) and extends to the rear surface of the cover bottom 160. That is, the backlight unit (120 of FIG. 3) of the present invention is a PCB wiring (182 of FIGS. 5A and 5B) in which the ends of the plurality of fluorescent lamps (172 of FIG. 3) are formed on the PCB (180 of FIG. 3). Is connected to an inverter (144 of FIG. 3) behind the cover bottom 160 by a wire (186 of FIG. 3) passing through a hole 162a or 162b formed in the cover bottom 160. Will have

7 is a schematic perspective view of a front surface of a backlight unit according to an embodiment of the present invention.

As shown, in the backlight unit according to the exemplary embodiment of the present invention, the plurality of fluorescent lamps 172 are arranged on the cover bottom 160, and between the fluorescent lamp 172 and the cover bottom 160. The reflective sheet 172 is disposed. In addition, one end of the fluorescent lamp 172 is fitted to the lamp socket 174 so that the fluorescent lamp 172 is stably mounted on the cover bottom 160.

A plurality of lampholders 174 are mounted on the first and second PCBs 180a and 180b in a row. The first and first PCBs 180a and 180b are formed parallel to each other at both side ends of the cover bottom 160. In the related art, since the first and second PCBs are formed on the rear surface of the cover bottom, the thickness of the liquid crystal display module increases. However, in the present invention, the first and second PCBs 180a and 180b cover the cover bottom 160. Since it is mounted on the front surface of the panel, the thickness of the LCD module can be reduced. The lamp sockets 174 described above are arranged in a row on the first and second PCBs 180a and 180b, and the first and second PCB wirings 182a and 182b connected in parallel with the lamp sockets 174 are formed. It is. That is, both ends of the fluorescent lamp 172 are connected to the first and second PCB wirings 182a and 182b formed on the first and second PCBs 180a and 180b through the lamp socket 174. In addition, first and second holes 184a and 184b are formed on the first and second PCBs 180a and 180b to correspond to the first and second PCB wirings 182a and 182b. As described above, each of the first and second holes 184a and 184b on the first and second PCBs 180a and 180b may include the third and fourth holes (162a and 162b of FIG. 6) under the cover bottom 160. ) Has a corresponding position. In FIG. 7, the fluorescent lamp 172 is an external electrode fluorescent lamp (EEFL). Therefore, the first and second PCBs 180a and 180b have balancing for distributing current to the plurality of fluorescent lamps 172. The unit (181 of FIG. 5A) is not formed. The first and second PCBs 180a and 180b are fixed to the cover bottom 160 through fastening means (not shown).

In addition, a support side 176 including a plurality of openings 178 is positioned corresponding to both side ends of the cover bottom 160. The support side 176 is coupled to the cover bottom 160 in such a way as to completely cover the first and second PCBs 180a and 180b, and the fluorescent lamp 172 may exit through the plurality of openings 178. do.

FIG. 8 is a view schematically illustrating a connection structure of an interleaver on a rear surface of a cover bottom in which a backlight unit is mounted.

The backlight unit is driven in a high-high manner, and thus the first and second inverter parts are connected to both ends of the fluorescent lamp. However, one end of the fluorescent lamp, which is a case where the backlight unit is driven in a high-low manner, will have a configuration in which the inverter is grounded instead of connected.

As shown, the first and second inverter parts 140a and 140b are formed on the rear surface of the cover bottom 160. Each of the first and second inverter units 140a and 140b is connected to inverters 144a and 144b for supplying power to a fluorescent lamp (not shown) and inverter connectors 146a and 146b connected to the inverters 144a and 144b. ) And inverter PCBs 142a and 142b on which the inverters 144a and 144b and the inverter connectors 146a and 146b are mounted. In addition, corresponding to both ends of the fluorescent lamp (not shown) mounted on the front surface of the cover bottom 160, third and fourth holes 162a and 162b penetrating through the cover bottom 160 are formed. It is. The third and fourth holes 162a and 162b correspond to the first and second holes (not shown) formed in the first and second PCBs (not shown) on the front surface of the cover bottom 160, respectively. The first and second wires 186a and 186b coupled to the third and fourth holes 162a and 162b are disposed in front of the cover bottom 160 through the first and second holes (not shown). It is electrically connected to both ends of the fluorescent lamp (not shown).

That is, although not shown, both ends of the fluorescent lamp (not shown) are respectively lamp sockets (not shown) and the first and second PCBs (not shown) mounted on both sides of the front surface of the cover bottom 160, respectively. And a second PCB wiring (not shown), and the like, and the first and second wires 186a and 186b respectively include first and third holes 162a and second and fourth holes (not shown). , 162b and are electrically connected to both ends of the fluorescent lamp (not shown) through the first and second PCB wirings (not shown).

In this case, first and second connectors 188a and 188b are formed at both ends of each of the first and second wires 186a and 186b. The first connector 188a of the first wire 186a is connected to the first PCB wiring (not shown) on the front of the cover bottom 160 through the third hole 162a and the first hole (not shown). The second connector 188b of the first wire 186a is coupled to the first inverter connector 146a of the first inverter unit 140a and connected to the first inverter 144a. As a result, one end of the fluorescent lamp (not shown) is connected to the first inverter 144a through a lamp socket (not shown), a first PCB wiring (not shown), a first wire 186a, and a first inverter connector 146a. )

In addition, the first connector 188a of the second wire 186b is connected to the second PCB wiring (not shown) in front of the cover bottom 160 through the fourth hole 162b and the second hole (not shown). The second connector 188b of the second wire 186b is coupled to the second inverter connector 146b of the second inverter unit 140b and connected to the second inverter 144b. As a result, the other end of the fluorescent lamp (not shown) is connected to the second inverter 144b through the lamp socket (not shown), the second PCB wiring (not shown), the second wire 186b, and the second inverter connector 146b. )

 In this case, two inverter parts are formed corresponding to both ends of the fluorescent lamp and are electrically connected through wires. Only one inverter part is connected at both ends of the cover bottom to connect both ends of the fluorescent lamp, thereby reducing manufacturing costs. An embodiment capable of saving will be described with reference to FIGS. 9 and 10.

9 and 10 are schematic perspective views of a front surface and a rear surface of a backlight unit according to another embodiment of the present invention, respectively.

In FIG. 9 and FIG. 10, an external electrode fluorescent lamp (EEFL) is used as a fluorescent lamp, and as a result, a simple structure in which a balancing unit is omitted is compared with that of a cold cathode fluorescent lamp (CCFL).

As shown, the backlight unit has a plurality of fluorescent lamps 272 made of an external electrode fluorescent lamp (EEFL) on the cover bottom 260 is spaced apart from each other in one direction, the fluorescent lamp 272 The reflective sheet 270 is disposed between the cover bottom 260. The first PCB 280a connected to one end of the fluorescent lamp 272 is arranged at one side of the cover 260 perpendicular to the longitudinal direction of the fluorescent lamp 272. Lamp sockets 274 are arranged on the first PCB 280a in correspondence with the fluorescent lamps 272. The lamp sockets 274 are soldered and electrically connected to the first PCB 280a. ) Is inserted into each lamp socket 274 is a structure that is electrically connected to the first PCB (280a). However, the connection between the lamp socket 274 and the first PCB 280a is not necessarily made by soldering.

The support side 276 having a plurality of openings 278 is coupled to the first PCB 280a formed at one side of the cover bottom 260. The plurality of openings 278 are formed at positions corresponding to the plurality of fluorescent lamps 272, and a space for entering the lamp socket 274 is formed inside the support side 276. Since the specific shape has been described with reference to FIG. 4, it will be omitted. In addition, a first PCB wiring 282a electrically connected to the plurality of lampholders 274 is formed along the length direction of the first PCB 280a on the first PCB 280a. 272 has a structure connected in parallel with the first PCB wiring 282a. The first hole 284 is formed on the first PCB 280a to correspond to the first PCB wiring 282a.

In addition, a second PCB 280b is formed at the other end of the fluorescent lamp 272 to face the first PCB 280a. A plurality of lampholders 274 are formed in the second PCB 280b to correspond to the fluorescent lamps 272, and the second PCB wiring 282b extends in the longitudinal direction of the second PCB 280b, that is, the first PCB 280b. It is formed in parallel with the first PCB wiring 282a of the PCB 280a. As in the first PCB 280a, a plurality of lampholders 274 are soldered onto the second PCB 280b and connected in parallel to the second PCB wiring 282b. However, no hole is formed in the second PCB 280b, and the first wire 286a is directly connected to one side of the second PCB wiring 282b. The first wire 286a extends along the longitudinal direction of the fluorescent lamp 272 to the side end where the first PCB 280a is formed and through the second hole 262a formed in the cover bottom 260. It extends to the back of the cover bottom 260. In this case, the first wire 286a passes between the cover bottom 260 and the reflective sheet 270, which is a characteristic of the backlight that may occur when the first wire 286a is positioned on the reflective sheet 270. This is to prevent degradation. The support side 276 is coupled to the second PCB 280b in the same shape as the support side 276 corresponding to the first PCB 280a.

9 illustrates a structure in which the wire extends to the rear surface of the cover bottom through a hole formed adjacent to the first PCB using a wire without forming a hole in the second PCB, but as described with reference to FIG. If the additional cover bottom is formed on both sides of the rear surface, the second PCB may also have the same structure as the first PCB, and may have a structure connected to the inverter part of the rear surface through a hole on the PCB.

The above-described structure is a case of driving in a high-high manner, and if driven in a high-low manner, a PCB is formed only on one side of the cover bottom and connected to one end of the fluorescent lamp, and the other end of the fluorescent lamp is grounded. Have

In the backlight unit having the above configuration, the first and second PCB wirings 282a and 282b electrically connected to both ends of the fluorescent lamp 272 are formed on the rear surface of the cover bottom 260 and include an inverter. To be electrically connected to the inverter unit, which will be described.

As shown in FIG. 8, the connection structure between the PCB wiring and the inverter forms holes in both sides of the cover bottom rear surface and also arranges the inverter unit including the inverter, thereby connecting two PCBs (or PCB wirings) formed on both sides of the front cover bottom. Each can be connected to the inverter unit on both sides. In this case, however, two inverter units are required, which means an increase in manufacturing cost. Therefore, the structure of the backlight which can be driven in a high-high manner while forming only one inverter unit will be described with reference to FIG.

As shown in FIG. 10, a rear surface of the cover bottom 260 is formed in a first hole (284 in FIG. 9) formed in the first PCB (280a of FIG. 9) on the front surface of the cover bottom 260. The third hole 262b is located at a corresponding position, and the second hole 262a through which the first wire 286a connected to the second PCB 280b of FIG. It is formed in the formed side end. The inverter unit 240 includes an inverter PCB 242, first and second inverters 244a and 244b and first and second inverter connectors 246a and 246b formed on the inverter PCB 242. Is formed adjacent to the second and third holes 262a and 262b.

A first connector 288 is formed at an end of the first wire 286a penetrating the second hole 262a, and is coupled to the first inverter connector 246a of the inverter unit 240, thereby providing a first wire. 286a is connected to the first inverter 244a. As described above, the first wire 286a is a fluorescent lamp through the second PCB wiring (282b of FIG. 9) on the second PCB (280b of FIG. 9) formed on the front surface of the cover bottom 260. As a result, the second inverter 244b has a second inverter connector 246b, a first wire 286a, a second PCB wiring (282b in FIG. 9), and the like. It has a structure that is connected to the other end of the fluorescent lamp (272 of FIG. 9) through the lamp socket (274 of FIG. 9) on the second PCB (280b of FIG. 9). In addition, the third hole 262b includes a second wire 286b having second and third connectors 289a and 289b formed at both ends thereof, and the second connector 289a includes a third hole ( A first PCB wiring (282a in FIG. 9) on the first PCB (280a in FIG. 9) formed in the front surface of the cover bottom 260 through the first hole (284 in FIG. Connected with In addition, the third connector 289b is coupled to the second inverter connector 246b of the inverter unit 240 and connected to the second interleaver 244b. That is, the second inverter 244b includes the second inverter connector 246b, the second wire 286b, the first PCB wiring (282a in FIG. 9) and the lamp socket (FIG. 10 in FIG. 10). 274) is connected to one end of the fluorescent lamp (272 of FIG. 9).

With this configuration, even when the backlight unit is driven in a high-high manner, instead of two inverter units formed on both sides of the rear cover bottom and connected to both ends of the fluorescent lamps, only one inverter unit is used. The inverter can be connected to both ends of the fluorescent lamp, thereby reducing the manufacturing cost.

Although the configuration of the above features has been described through the backlight unit to which the external electrode fluorescent lamp (EEFL) is applied, it can be applied to the backlight unit to which the cold cathode fluorescent lamp (CCFL) is applied.

FIG. 11 is a schematic view of a rear cover bottom of a liquid crystal display module according to still another exemplary embodiment of the present invention.

First, referring to FIG. 3, the liquid crystal display device module includes a liquid crystal panel 110, a top case 135 on the upper side thereof, a main frame 130 positioned below the liquid crystal panel 110, a backlight unit 120, The cover shield 150 is made. However, unlike the liquid crystal display module of FIG. 3, the backlight unit of the liquid crystal display module according to the present embodiment does not include an inverter unit, especially an inverter PCB.

Referring to FIG. 7 of the front surface of the cover bottom which is a component of the backlight unit 120, a plurality of fluorescent lamps 172 are arranged in the cover bottom 160, and the fluorescent lamp 172 and the cover are covered. The reflective sheet 170 is formed between the bottom 160. In addition, one end of the fluorescent lamp 172 is fitted to the lamp socket 174 so that the fluorescent lamp 172 is stably mounted on the cover bottom 160.

A plurality of lampholders 174 are mounted on the first and second PCBs 180a and 180b in a row. The first and first PCBs 180a and 180b are formed parallel to each other at both side ends of the cover bottom 160. Lamp sockets 174 are arranged in a row on the first and second PCBs 180a and 180b, and first and second PCB wirings 182a and 182b connected in parallel with these lamp sockets 174 are formed. . That is, both ends of the fluorescent lamp 172 are connected to the first and second PCB wirings 182a and 182b formed on the first and second PCBs 180a and 180b through the lamp socket 174. In addition, first and second holes 184a and 184b are formed on the first and second PCBs 180a and 180b to correspond to the first and second PCB wirings 182a and 182b.

In addition, a support side 176 including a plurality of openings 178 is positioned corresponding to both side ends of the cover bottom 160. The support side 133 is coupled to the cover bottom 160 in such a manner as to completely cover the first and second PCBs 180a and 180b, and the fluorescent lamp 172 is pulled out through the plurality of openings 178. Come out.

Referring to FIG. 11, which shows the rear surface of the cover bottom, a power supply unit 390 is formed on the rear surface of the cover bottom 360, and the power supply unit 360 includes first and second inverters 344a and 344b and First and second inverter connectors 346a and 346b connected to each of them are formed. The power supply unit 360 serves to supply power for driving the liquid crystal panel 110 of FIG. 3, which is an essential component of the liquid crystal display module. In this embodiment, the inverters 344a and 344b and the inverter connectors 346a and 346b for driving the backlight unit are formed in the power supply unit 360, thereby inverting the inverter PCB conventionally formed for mounting the inverter and the inverter connector. Can be omitted, thereby reducing the manufacturing cost and shortening the manufacturing process time.

In addition, third and fourth holes 362a and 362b are formed at both side ends of the rear surface of the cover bottom 360. Each of the third and fourth holes 362a and 362b is formed of the first and second holes formed in the first and second PCBs (180a and 180b of FIG. 7) on the front surface of the cover bottom 360 (FIG. 7). 7, 184a and 184b). In addition, first and second wires 386a and 386b, which are connecting means for connecting the fluorescent lamp 172 of FIG. 7 to the inverters 344a and 344b, are formed on the rear surface of the cover bottom 360. First and second connectors 389a and 389b are connected to both ends of the first wire 386a, and the first connector 389a includes a third hole 362a and a first hole (184a in FIG. 7). Is connected to the first PCB wiring (182a of FIG. 7) on the first PCB (180a of FIG. 7), and the second connector 389b is connected to the first inverter connector 346a formed on the power supply unit 390. By coupling, the first wire 386a and the first inverter 344a are connected. Since one end of the fluorescent lamp (172 in FIG. 7) is connected to the first PCB wiring (182a in FIG. 7) on the first PCB (180a in FIG. 7), one end of the fluorescent lamp (172 in FIG. 7) The first PCB wiring (182a of FIG. 7) and the first wire 386a are connected to the first inverter 344a.

In addition, first and second connectors 389a and 389b are also connected to both ends of the second wire 346b, and the first connector 389a of the second wire 346b includes a fourth hole 362b and It is connected to the second PCB wiring (182b of FIG. 7) on the second PCB (180b of FIG. 7) through the second hole (184b of FIG. 7), and the second connector 389b of the second wire 346b is a power source. The second wire 386b is connected to the second inverter 344b by being coupled to the second inverter connector 346b formed in the supply unit 390. Since the other end of the fluorescent lamp (172 of FIG. 7) is connected to the second PCB wiring (182b of FIG. 7) on the second PCB (180b of FIG. 7), one end of the fluorescent lamp (172 of FIG. 7) The second PCB wiring (182b of FIG. 7) and the second wire 386b are connected to the second inverter 344b.

In the liquid crystal display module of FIG. 11, a power supply unit 390 for supplying power to the liquid crystal panel (110 in FIG. 3) of the first and second inverters 344a and 344b connected to both ends of the fluorescent lamp (172 in FIG. 7). ), The conventional inverter PCB can be omitted. That is, it has an advantageous effect in terms of manufacturing cost and manufacturing time.

In FIG. 11, a backlight unit having an inverter connected to both ends of the fluorescent lamp, that is, a backlight unit driven in a high-high manner has been described as an example. Only one end of the fluorescent lamp needs to be connected to the inverter.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

1 is an exploded perspective view schematically showing a liquid crystal display module having a conventional direct type backlight unit.

FIG. 2 is a view schematically illustrating a structure of a rear surface of the liquid crystal display module of FIG. 1.

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

4 is a cross-sectional view illustrating an inside of a support side in a liquid crystal display module having a backlight lamp according to an exemplary embodiment of the present invention.

5A and 5B are perspective views illustrating a PCB according to an embodiment of the present invention, respectively.

6 is a schematic perspective view of a rear cover bottom of the backlight unit according to an exemplary embodiment of the present invention.

7 is a schematic perspective view of a front surface of a backlight unit according to an embodiment of the present invention.

FIG. 8 is a view schematically illustrating a connection structure of an interleaver on a rear surface of a cover bottom in which a backlight unit is mounted.

9 and 10 are schematic perspective views of a front surface and a rear surface of a backlight unit according to another embodiment of the present invention, respectively.

FIG. 11 is a schematic view of a rear cover bottom of a liquid crystal display module according to still another exemplary embodiment of the present invention.

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

110: liquid crystal panel 115: gate, data printed circuit board

120: backlight unit 130: support main

160: cover bottom 172: fluorescent lamp

180: printed circuit board 182: PCB wiring

Claims (24)

A cover bottom; A first circuit board formed at one side end of the front surface of the cover bottom in a first direction; A plurality of fluorescent lamps having one end disposed on the first circuit board and arranged perpendicular to the first direction; A first wiring formed on the first circuit board and connected to one end of each of the plurality of fluorescent lamps; A first inverter part disposed on a rear surface of the cover bottom and including a first inverter connected to the first wiring through a first hole passing through the cover bottom; Backlight unit for a liquid crystal display device comprising a. The method of claim 1, And the first circuit board has a second hole corresponding to the first hole, and the first inverter is connected to the first wiring through the first and second holes. The method of claim 2, One end of each of the plurality of fluorescent lamps is coupled, characterized in that it comprises a plurality of lamp sockets connected in parallel to the first wiring. The method of claim 1, And a second circuit board formed at the other side of the front surface of the cover bottom in the first direction. The method of claim 4, wherein And the other end of each of the plurality of fluorescent lamps is located on the second circuit board. The method of claim 5, wherein And a second inverter unit disposed on a rear surface of the cover bottom and having a second inverter connected to other ends of the plurality of fluorescent lamps through a second hole penetrating through the cover bottom. The method of claim 6, And the first and second holes are positions corresponding to one end and the other end of the fluorescent lamp, respectively. The method of claim 7, wherein And each of the first and second inverters has a position corresponding to the first and second holes. The method of claim 8, The second circuit board includes a second wiring connected to the other end of the plurality of fluorescent lamps, And each of the first and second wires is connected to the first and second inverters through first and second holes. The method of claim 4, wherein A second wiring is formed on the second circuit board, the second wiring being connected to the other end of each of the fluorescent lamps, and the first inverter is connected to the second wiring through a second hole passing through the cover bottom. Characteristic backlight unit. The method of claim 10, And the first and second holes are positions corresponding to one end of the fluorescent lamp. The method of claim 11, And a first wire connected to the second wiring, extending through the second hole to the rear surface of the cover bottom, and connected to the first inverter. The method of claim 12, And a reflective sheet positioned between the cover bottom and the plurality of fluorescent lamps. The method of claim 13, And the first wire extends through the cover bottom and the reflective sheet to the second hole. The method of claim 1, The plurality of fluorescent lamps are external electrode fluorescent lamps (EEFL) characterized in that the backlight unit. The method of claim 1, And a wire connected to one end of the plurality of fluorescent lamps through the first hole, wherein the first inverter part includes a connector connected to the wire, and an inverter circuit board on which the connector and the first inverter are mounted. Back light unit The method of claim 1, And a support side coupled to both side ends of the cover bottom and covering the first circuit board. The method of claim 17, A plurality of lamp sockets are formed on the first circuit board to be coupled to each of the plurality of fluorescent lamps, and the support side includes an inner space in which the plurality of lamp sockets are mounted and a plurality of through holes through which the plurality of fluorescent lamps pass. Backlight unit characterized in that having a. The method of claim 1, And a plurality of optical sheets on the plurality of fluorescent lamps. A liquid crystal panel; A first circuit board configured to supply light to the liquid crystal panel, a cover bottom, a first circuit board formed at one side end of the front surface of the cover bottom in a first direction, and one end of the first printed circuit board; A plurality of fluorescent lamps arranged perpendicularly to one direction, first wirings formed on the first circuit board and connected to one end of each of the plurality of fluorescent lamps, located on a rear surface of the cover bottom, and the cover bottom A backlight unit including an inverter connected to the first wire through a first hole passing through the first hole; A power supply unit which supplies power to the liquid crystal panel and is formed on a rear surface of the cover bottom, The inverter is a liquid crystal display module located on the power supply. The method of claim 20, A second circuit board formed along the first direction at the other end of the front surface of the cover bottom; A second wiring formed on the second circuit board and connected to the other end of each of the plurality of fluorescent lamps; And the inverter is connected to the second wire through a second hole passing through the cover bottom. The method of claim 21, A first wire passing through the first hole and connecting the first wire and the inverter; And a second wire passing through the second hole to connect the second wire and the inverter. The method of claim 20, A plurality of optical sheets positioned between the liquid crystal panel and the plurality of fluorescent lamps; A support main for supporting the liquid crystal panel and the backlight; A top cover surrounding an edge of the liquid crystal panel; Cover shield provided on the back of the backlight unit Liquid crystal display module characterized in that it comprises a. The method of claim 20, And a support side coupled to both side ends of the cover bottom and covering the first circuit board.

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