KR100774570B1 - Power supply unit, back light assembly having the power supply unit and display device having the same - Google Patents

Abstract

Disclosed are a power supply unit having improved assembly property, a backlight assembly having the same, and a display device having the same. The power supply unit includes a power supply substrate on which coupling holes and a power output terminal are formed, a body detachably coupled to the coupling holes, a power supply terminal coupled to an electrode of a lamp, and a connection terminal connected to the power output terminal. A plurality of lamp fixing parts including an applying member, and a power supply element disposed on the power supply substrate to output the lamp power voltage to the power output terminal. The lamps are fixedly and electrically connected to exposed lamp fixtures through an opening formed in the bottom plate of the container.

Backlight, lamp fixing, connector, power, hall, assembly

Description

Power supply unit, backlight assembly and display device having the same {POWER SUPPLY UNIT, BACK LIGHT ASSEMBLY HAVING THE POWER SUPPLY UNIT AND DISPLAY DEVICE HAVING THE SAME}

1 is a perspective view of a power supply unit according to a first embodiment of the present invention.

FIG. 2 is a rear perspective view of the power supply unit shown in FIG. 1.

3 is an exploded perspective view of the power supply unit shown in FIG. 1.

4 is a perspective view of the lamp fixing unit illustrated in FIG. 1.

FIG. 5 is a partial cross-sectional view of the power supply unit shown in FIG. 1 taken along line II ′. FIG.

6 is a partial sectional view of a power supply unit according to a second embodiment of the present invention.

7 is a partial sectional view of a power supply unit according to a third embodiment of the present invention.

8 is a partial perspective view of a power supply unit according to a fourth embodiment of the present invention.

FIG. 9 is a partial cross-sectional view taken along the line II-II 'of the power supply unit shown in FIG. 8.

10 is a perspective view of a backlight assembly according to a fifth embodiment of the present invention.

FIG. 11 is an enlarged view of the first region shown in FIG. 10.

FIG. 12 is a rear perspective view of the backlight assembly shown in FIG. 10.

FIG. 13 is an exploded perspective view of the backlight assembly shown in FIG. 10.

FIG. 14 is a cross-sectional view of the backlight assembly illustrated in FIG. 13 taken along line III-III '.

15 is an exploded perspective view of a backlight assembly according to a sixth embodiment of the present invention.

FIG. 16 is a cross-sectional view of the backlight assembly illustrated in FIG. 15 taken along line IV-IV ′.

17 is a cross-sectional view of a backlight assembly according to a seventh embodiment of the present invention.

18 is an exploded perspective view of a display device according to an eighth exemplary embodiment of the present invention.

FIG. 19 is a cross-sectional view of the display device illustrated in FIG. 18 taken along the line VV ′.

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

100: power supply unit 101: lamp

105: lead wires 110, 555: power supply board

111: coupling hole 115: power output terminal
130: body 135: lamp guide portion
140: power supply member 141: connection terminal

delete

145: power supply terminal 150: lamp fixing

170: power supply element 330: lamp fixing part

500: backlight assembly 510: storage container

515: bottom plate 513: side wall

511: first opening 517: second opening

520: first insulating member 540: reflective sheet

550: power discharge unit 557: second connector

560: second insulating member 610: first side mold

630: second side mold 650: optical unit

800: display device 850: display panel

810 middle mold 870 second storage container

The present invention relates to a power supply unit, a backlight assembly having the same, and a display device having the same. More particularly, the present invention relates to a power supply unit having improved assembly property, a backlight assembly having the same, and a display device having the same.

In general, cathode ray tubes (CRTs) used in image display devices such as televisions and computer monitors occupy the highest share in terms of display quality and economy, but have many disadvantages such as heavy weight, large volume and high power consumption. Have.

However, due to the rapid advancement of semiconductor technology, the electronic display device suitable for the new environment, that is, the thin and light, the low driving voltage and the low power consumption, according to the solidification, low voltage and low power of various electronic devices, and the miniaturization and light weight of electronic devices There is an increasing demand for a flat panel display device having the characteristics of.

Among the various flat panel displays currently developed, the liquid crystal display is thinner and lighter than other display devices, has a low power consumption and a low driving voltage, and is widely used in various electronic devices because it can display images close to cathode ray tubes. Is being used.

The liquid crystal display may be classified into a transmissive liquid crystal display that displays an image using an external light source and a reflective liquid crystal display using natural light instead of the external light source. Electronic devices such as clocks and calculators that minimize power consumption often use the reflective liquid crystal display device. However, the transmissive liquid crystal display device is generally used in notebook computers that require high-quality image display.

The transmissive liquid crystal display uses a backlight disposed on a rear surface of a display panel as an external light source, and a backlight assembly employed in a conventional display device includes a direct downward type back light assembly and an edge ( It is divided into an edge type back light assembly.

In the direct type backlight assembly, a plurality of light sources are disposed under the display panel. In the edge type backlight assembly, a light source is disposed on a side of the light guide plate to provide light to the display panel.

As a light source used in the direct backlight assembly, a cold cathode fluorescent lamp (CCFL) is representative, and the direct backlight assembly employing the cold cathode fluorescent lamp has a lamp for fixing the lamps on the bottom surface of the container. It further includes a socket.

In recent years, the size of the display panel has increased in size. Accordingly, in order to provide uniform and high brightness light to the large display panel, a backlight assembly using one flat fluorescent lamp as a light source or a plurality of fluorescent lamps connected in parallel as a light source has been developed. In addition, in order to easily assemble the plurality of lamps, a backlight assembly has been developed in which an electrode portion of the lamps and a lamp socket are fitted.

However, while the lamp socket can firmly fix the lamps on the bottom surface of the storage container, the number of the lamp sockets is also increased in proportion to the number of the lamps. Furthermore, as described above, as the size of the display panel is increased, the number of the lamps employed in the backlight assembly is also increasing. As a result, the number of the lamp sockets mounted in the display device is also increasing. When the number of lamp sockets is increased, the weight of the display device is increased and the assembly time is increased.

Further, in the assembly of a conventional backlight assembly, in order to provide a driving voltage to the lamps, soldering a plurality of power supply voltage supply wires connected to the plurality of sockets and an inverter, or a plurality of the sockets to a printed circuit board Soldered.

For this reason, the assembly of the backlight assembly takes a long time, and the lamp is frequently damaged during the soldering process.

In addition, as the operating time of the backlight assembly becomes long, there is a problem in that the soldering portion is frequently disconnected.

Accordingly, the technical problem of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a power supply unit that can be assembled by detachably combining the lamp fixing part.

Another object of the present invention is to provide a backlight assembly comprising the above-described power supply unit.

Another object of the present invention is to provide a display device including the power supply unit.

In order to realize the object of the present invention, a power supply unit according to an embodiment includes a power supply substrate, a plurality of lamp fixing parts and a power supply element. Coupling holes and a power output terminal are formed in the power supply substrate to correspond to each of the coupling holes. Each lamp fixing portion includes a body and a power applying member. The body is detachably coupled to each of the coupling holes. The power applying member includes a power supply terminal coupled to an electrode of a lamp disposed on one side of the body, and a connection terminal extending from the power supply terminal and connected to the power output terminal formed on the power supply substrate. A power supply element is disposed on the power supply substrate, and outputs a lamp power voltage to the power output terminal.
In order to realize the object of the present invention, a power supply unit according to another embodiment includes a power supply substrate, a power applying member, and a power supply element. The lamp fixing part is integrally formed on the power supply substrate. The lamp fixing portion fixes the end of the lamp in which the electrode portion is disposed. The power applying member includes a power applying terminal and a connection terminal extending from the power applying terminal. The power supply terminal is connected to an electrode portion of the lamp, and the connection terminal is connected to a power output terminal formed on the power supply substrate.
In order to realize another object of the present invention, a backlight assembly according to an embodiment includes a storage container, a power supply unit, and lamps. The storage container includes a bottom plate having first openings formed therein. The power supply unit includes a first power supply board, first connectors and a power supply element. The first power supply substrate is disposed on a rear surface of the bottom plate, and first coupling holes corresponding to the first openings are formed in the first power supply substrate. The first connectors are removably fitted into the first coupling holes and inserted into the first openings. The power supply element is disposed on the first power supply substrate to apply a power voltage to the first connectors. The electrode portion of the lamps is connected to the first connectors exposed through the first opening.
In accordance with another aspect of the present invention, a display device includes a storage container, a power supply unit, lamps, and a display panel. The storage container includes a bottom plate having openings formed therein. The power supply unit includes a power supply board, connectors and a power supply element. The power supply substrate is disposed on a rear surface of the bottom plate, and coupling holes corresponding to the openings are formed in the power supply substrate. The connectors are removably fitted into the coupling holes and inserted into the openings. The power supply element is disposed on the power supply substrate to apply a power voltage to the lamp fixing parts. The electrode part of the lamps is fixed to the power supply terminal of the connector exposed through the opening, and is electrically connected to the connectors. The display panel is disposed above the lamps to display an image based on the light provided from the lamps.
According to such a power supply unit, a backlight assembly and a display device having the same, a process of fixing the lamp fixing part to the bottom plate of the storage container and a soldering process between the lamp fixing part and the power supply unit are omitted, thereby improving assembly performance. The number of components can be reduced.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

delete

delete

delete

delete

delete

Power supply unit

1 is a perspective view of a power supply unit according to a first embodiment of the present invention. FIG. 2 is a rear perspective view of the power supply unit shown in FIG. 1. 3 is an exploded perspective view of the power supply unit shown in FIG. 1.

1 to 3, the power supply unit 100 includes a power supply substrate 110, lamp fixing parts 150, and a power supply element 170.

The power supply substrate 110 has a plate shape, and a plurality of coupling holes 111 are formed at one edge of the power supply substrate 110 along a length direction of the power supply substrate 110.

The lamp fixing parts 150 fix the lamp to the power supply substrate 110. To this end, the lamp fixing parts 150 are fitted to the coupling holes 111 to be detachably fitted. The lamp fixing part 150 may be fitted into the coupling hole 111 from a direction in which the power supply element 170 to be described later is disposed or an opposite direction thereof.

The power supply element 170 is disposed on the power supply substrate 110 to apply power voltages to the lamp fixing parts 150. The power supply device 170 is an inverter that outputs the first power voltage supplied from the outside by changing the second power voltage. The inverter changes the AC power supplied from the outside into the DC power, boosts or decompresses the changed DC power to the level required for the lamp, and changes the AC power from the boosted or reduced DC power again.

4 is a perspective view of the lamp fixing unit illustrated in FIG. 1. FIG. 5 is a partial cross-sectional view of the power supply unit shown in FIG. 1 taken along line II ′. FIG.

1 to 5, the lamp fixing part 150 electrically connects the lamp 101 and the power supply element 170 to be described later, which provides a power voltage to the lamp 101. The lamp 101 includes a lamp tube into which discharge gas is injected, a fluorescent layer applied to an inner wall of the lamp tube, and an electrode disposed at an end of the lamp tube. When a power supply voltage is applied to the electrode, the discharge gas discharges invisible light, and the fluorescent layer converts the invisible light into visible light.

In Fig. 5, the lamp 101 is a cold cathode fluorescent lamp. The electrode of the cold cathode fluorescent lamp 101 includes a discharge electrode and a lead wire 105. The discharge electrode is disposed inside the lamp tube, and the lead wire 105 extends from the discharge electrode to the outside of the lamp tube. The lamp fixing part 150 includes a body 130 and a power applying member 140.

The body 130 is fitted fit detachably to the coupling hole (111). The body 130 is preferably made of a material having excellent insulation. The body 130 includes a bottom part 131 and a lamp guide part 135. The lamp guide part 135 protrudes from the bottom part 131, and a groove in which an end portion of the lamp tube is disposed is formed on the lamp guide part 135.

4 and 5, the lamp guide part 135 includes first and second supports. The first and second supports protrude from the bottom part 131 spaced apart from each other by a predetermined distance. Accordingly, the release of heat generated at the electrode of the lamp 101 is prevented by the lamp guide part 135.

The power applying member 140 is fixed to the body 130 spaced apart from the lamp guide unit 135 by a predetermined interval. In detail, the power applying member 140 is disposed to penetrate the body 130, and the connection terminal 141 exposed to the outside of the body 130 extends along the surface of the power supply substrate 110. Then, it is connected to the power output terminal 115 connected to the power supply element 170.

As the connection terminal 141 presses the power output terminal 115 by an elastic force, the power applying member 140 and the power output terminal 115 are electrically connected to each other. In another embodiment, the connection terminal 141 and the power output terminal 115 of the power applying member 140 may be electrically connected to each other through soldering.

The power applying member 140 further includes a power applying terminal 145. The power applying terminal 145 is connected to the connection terminal 141 and protrudes to one surface of the body 130 facing the connection terminal 141. The power applying terminal 145 has a clip shape so that the lead wire 105 of the lamp 101 is detachably fitted. The lead wire of the lamp 101 is fixed to the power supply terminal 145 so that the lamp 101 and the power supply element 170 are electrically connected to each other.

In FIG. 2, the lamp fixing parts 150 are grouped into three groups, and the power supply unit 100 includes a plurality of power supply elements 170. The lamp fixing parts 150 belonging to each group are electrically connected in parallel to one power supply element 170.

In another embodiment, all of the lamp fixing parts 150 may be electrically connected to one power supply element 170 in parallel. In another embodiment, the lamp fixing parts 150 may be connected to the power supply element 170, respectively, and the lamp fixing parts 150 may be electrically connected in series.

6 is a partial sectional view of a power supply unit according to a second embodiment of the present invention.

Referring to FIG. 6, the power supply unit 200 includes a power supply substrate 210, lamp fixing parts 250, and a power supply element 270.

The power supply substrate 210 includes an upper surface and a rear surface opposite to the upper surface. The power supply element 270 is disposed on the upper surface to provide a power voltage to the lamp fixing part 250 to be described later. A plurality of coupling holes 211 penetrating from the upper surface to the rear surface are formed at one edge of the power supply substrate 210. The coupling holes 211 are disposed along a length direction of the power supply substrate 210.

The lamp fixing part 250 is coupled to the coupling hole 211. The lamp fixing part 250 includes a body 230 and a power applying member 240. The body 230 is forcibly fitted to the coupling hole 211 and is pressed to a predetermined pressure so as to be detachably inserted from the coupling hole 211.

The body 230 includes a bottom part 231 and a lamp guide part 235. The lamp guide part 235 protrudes from the bottom part 231, and a groove in which an end of the lamp tube is disposed is formed at an upper part of the lamp guide part 235. The bottom portion 231 of the body 230 is exposed to the rear surface of the power supply substrate 210, and the lamp guide portion 235 is opposite to the rear surface of the power supply substrate 210. Protrudes to the upper surface of 210.

The power applying member 240 penetrates through the body 230, and is bent in the body 230 so that one end 241 is exposed to the upper surface of the power supply substrate 210. The one end 241 becomes a connection terminal 241 electrically connected to the power supply element 270, and is connected to a power output terminal 215 electrically connected to the power supply element 270.

As the connection terminal 241 presses the power output terminal 215 by an elastic force, the power applying member 240 and the power output terminal 215 are electrically connected to each other. In another embodiment, the connection terminal 241 and the power output terminal 215 of the power applying member 240 may be electrically connected to each other through soldering.

The power applying terminal 245 connected to the connection terminal 241 protrudes in the direction in which the lamp guide part 235 is formed. The power supply terminal 245 fixes the lead wire 205 of the lamp 201 and applies a power supply voltage to the lead wire 205.

6, the lamp fixing parts 250 are electrically connected in parallel to each other. In another embodiment, the lamp fixing parts 250 may be electrically connected in series.

7 is a partial sectional view of a power supply unit according to a third embodiment of the present invention.

Referring to FIG. 7, the power supply unit 300 includes a power supply substrate 310, a power applying member 340, and a power supply element 370.

The power supply substrate 310 has a plate shape and includes a first surface and a second surface facing the first surface. A plurality of lamp fixing parts 330 protrude along the longitudinal direction of the power supply substrate 310 at one edge of the power supply substrate 310. The lamp fixing part 330 is formed integrally with the power supply substrate 310, and a part of the lamp fixing part 330 is exposed to the second surface of the power supply substrate 310, and the first surface of the power supply substrate 310 is exposed. It protrudes by a predetermined height. The lamp fixing part 330 is formed with a guide groove 335 to which the end of the lamp 301 is fixed.

The power applying member 340 is disposed to penetrate the lamp fixing part 330. In FIG. 7, the power applying member 340 is a conductive clip 340. The conductive clip 340 passes through the lamp fixing part 330, and one end 341 of the conductive clip 340 is exposed to the second surface of the power supply substrate 310 to cover the second surface. Accordingly extends by a predetermined length. The one end 341 is electrically connected to the power supply element 370 disposed on the second surface.

Specifically, the power supply substrate 310 includes a power output terminal 315 for electrically connecting the one end portion 341 and the power supply element 370. The power output terminal 315 and the one end 341 of the conductive clip 340 are interconnected by the elastic force of the conductive clip 340. In another embodiment, the one end portion 341 may be connected to the power output terminal through the power output terminal dithering.

The other end of the conductive clip 340 connected to the one end 341 is a power supply terminal 345 having a clip shape, the lamp fixing portion 330 in the first surface direction of the power supply substrate 310 Protrude from). In this case, the power supply terminal 345 of the conductive clip 340 is electrically connected to the lead wire 305 extending from the electrode portion of the lamp 301 disposed in the guide groove 335. 335 is spaced apart from the predetermined interval.

8 is a partial perspective view of a power supply unit according to a fourth embodiment of the present invention. FIG. 9 is a cross-sectional view of the power supply unit shown in FIG. 8 taken along the line II-II '.

8 and 9, the power supply unit 400 includes a power supply substrate 410, lamp fixing portions 450, and a power supply element 470. Since the power supply unit 400 is substantially the same as the power supply unit 100 illustrated in FIGS. 1 to 5 except for the shape of the lamp fixing portion 450, a redundant description thereof will be omitted.

The lamp fixing part 450 includes a body 430 and a power applying member 440. The body 430 has the lamp fixing part 150 shown in FIG. 4 except that the portion where the power applying member 440 is disposed and the base surface of the lamp guide part 435 are formed at the same height. The same as the body 130 of the.

The power applying member 440 has one end portion 441 electrically connected to the power supply element 470 disposed on the rear surface of the power supply substrate 410 and a power applying terminal connected to the one end portion 441. 445 protrudes near the lamp guide portion 435.

8 and 9, the power supply terminal 445 fixes one end of an external electrode lamp EEFL 401 and is electrically connected to the lamp 401.

The lamp 401 includes a lamp tube and an electrode unit 405 into which discharge gas is injected. The electrode portion 405 is disposed on the outer wall of the end of the lamp tube. The power supply terminal 445 has a ring shape with one side open to accommodate the electrode portion 405.

1 to 9 illustrate embodiments in which the lamp fixing parts 150, 250, and 450 fix one lamp 101, 201, and 401. However, in an embodiment different from the above-described embodiments, power is supplied. The unit may include a lamp fixing unit in which a plurality of the lamp fixing units 150, 250, and 450 are coupled in series at regular intervals.

Backlight assembly

10 is a perspective view of a backlight assembly according to a fifth embodiment of the present invention. FIG. 11 is an enlarged view of the first region shown in FIG. 10. FIG. 12 is a rear perspective view of the backlight assembly shown in FIG. 10.

10 to 12, the backlight assembly 500 includes a storage container 510, a power supply unit 100, and a lamp 530.

The storage container 510 includes a bottom plate 515 and sidewalls 513 disposed at the periphery of the bottom plate 515. A plurality of first openings 511 are formed in the bottom plate 515 near the sidewall 513 along the sidewall 513.

The power supply unit 100 includes a first power supply board 110, first connectors 150, and a power supply element 170.

The first power supply substrate 110 has a plate shape and is disposed on the rear surface of the bottom plate 515. The first power supply substrate 110 may include a first surface facing the rear surface and a second surface opposite to the first surface. The power supply element 170 is disposed on the second surface to provide a power voltage to the first connectors 150 to be described later. First coupling holes 111 corresponding to the first openings 511 are formed in the first power supply substrate 110. The first coupling holes 111 are disposed along a length direction of the first power supply substrate 110.

Since the first connector 150 is substantially the same as the lamp fixing part 150 illustrated in FIG. 4, the same connector is denoted by the same reference numerals, and redundant description thereof will be omitted.

The first connectors 150 are detachably fitted to the first coupling holes 111 and inserted into the first openings 511. The power applying member 140 penetrating the body 130 of the first connector 150 is electrically connected to the power supply element 170.

One end of the lamps 530 is fixed to the first connectors 150 exposed through the first opening 511. Specifically, end portions of the lamps 530 on which the electrode parts are disposed are fixed to the lamp guide groove 135 formed in the body 130 of the first connector 150, and the lead wire 105 extending from the electrode part is The power applying terminal 145 of the power applying member 140 is fitted.

FIG. 13 is an exploded perspective view of the backlight assembly shown in FIG. 10. FIG. 14 is a cross-sectional view of the backlight assembly illustrated in FIG. 13 taken along line III-III '.

12 to 14, at one edge of the bottom plate 515 of the storage container 510, a second opening 517 corresponding to the other end facing the one end of the lamps 530 is provided. Are formed more.

The backlight assembly 500 further includes a power discharge unit 550.

The power discharging unit 550 is electrically connected to an electrode unit disposed at the other end of the lamps 530. The power discharging unit 550 includes a second power supply board 555 and second connectors 557.

The second power supply substrate 555 is disposed on the rear surface of the bottom plate 515 to be spaced apart from the first power supply substrate 110 by a predetermined interval. Second coupling holes 551 corresponding to the second openings 517 are formed in the second power supply substrate 555.

Since the second connector 557 is substantially the same as the lamp fixing part 150 illustrated in FIG. 4, a redundant description thereof will be omitted. The second connector 557 is detachably fitted into the second coupling hole 551 and is inserted into the second opening 517. The other ends of the lamps 530 are fixed to the second connectors 557 exposed through the second opening 517. Specifically, the other end of the lamp 530 in which the electrode portion is disposed is fixed to the lamp guide groove formed in the body of the second connector 557, the lead wire extending from the electrode portion is fitted to the power supply terminal.

In FIG. 14, the power discharging unit 550 grounds the second connectors 557. In another embodiment, the power discharging unit 550 may be electrically connected to the power supply unit 100.

The backlight assembly 500 further includes a first insulating member 520, a second insulating member 560, and a reflective sheet 540.

The first insulating member 520 is disposed between the bottom plate 515 and the power supply unit 100 to insulate the storage container 510 and the power supply unit 100 from each other. The second insulating member 560 is disposed between the bottom plate 515 and the power discharging unit 550 to insulate the storage container 510 and the power discharging unit 550 from each other.

The reflective sheet 540 is disposed on the bottom plate 515 to reflect light emitted from the lamps 530 to the upper portion of the storage container 510. The reflective sheet 540 extends to an upper portion of the other side wall along the other sidewall 513 of the storage container 510. The reflective sheet 540 is formed with a hole 541 into which the protrusion 519 formed on the other side wall is inserted.

15 is an exploded perspective view of a backlight assembly according to a sixth embodiment of the present invention. FIG. 16 is a cross-sectional view of the backlight assembly illustrated in FIG. 15 taken along line IV-IV ′.

15 and 16, except that the backlight assembly 600 further includes a first side mold 610, a second side mold 630, and an optical unit 650. Since the backlight assembly 500 is substantially the same, the same reference numerals are used to designate the same components, and redundant descriptions are omitted.

The first side mold 610 is disposed on the bottom plate 515 to cover the one ends of the first connectors 150 and the lamps 530. The first side mold 610 extends substantially perpendicular to the lamps 530 along the sidewall 513. The first side mold 610 includes two support walls between the first connectors 150 and the upper walls connecting the support walls to the bottom plate 515. Stepped portions are formed in the upper wall. Grooves are formed in the support walls, which are spaced apart from the side walls 513, to prevent interference with the lamps 530.

The second side mold 630 is disposed on the bottom plate 515 to cover the other ends of the second connectors 557 and the lamps 530. The second side mold 630 has a shape substantially the same as that of the first side mold 610.

The optical unit 650 emits upwards by improving optical characteristics of light emitted from the lamps 530, for example, brightness uniformity and front brightness. The optical unit 650 includes a diffusion plate 651 and light collecting sheets 653 and 655.

The diffusion plate 651 diffuses the light emitted from the lamps 530 and emits light having improved luminance uniformity. The diffusion plate 651 is disposed on stepped portions formed on upper walls of the first and second side molds 630. The light collecting sheets 653 and 655 collect light emitted from the diffuser plate 651 in different directions, preferably perpendicular to each other, thereby improving front brightness of the backlight assembly 600.

17 is a cross-sectional view of a backlight assembly according to a seventh embodiment of the present invention.

Referring to FIG. 17, the backlight assembly 700 is substantially the same as the backlight assembly 600 illustrated in FIGS. 15 and 16 except for the power supply unit 200 and the power discharging unit 750. The same reference numerals are assigned to the components, and duplicate descriptions are omitted.

The power supply unit 200 has a bottom plate 515 of the storage container 510 is disposed on the rear. In this case, the power supply element 270 and the bottom plate 515 of the storage container 510 are disposed to face each other. Since the power supply unit 200 is the same as the power supply unit 200 shown in FIG. 6, the same reference numerals are used, and a detailed description thereof will be omitted.

The power discharging unit 750 is a power supply member 756 included in the second connector 757 except that the projecting between the second power supply board 755 and the bottom of the bottom plate 515 Since it is the same as the power discharging unit 550 shown in Figs.

Display device

18 is an exploded perspective view of a display device according to an eighth exemplary embodiment of the present invention. FIG. 19 is a cross-sectional view of the display device illustrated in FIG. 18 taken along the line VV ′.

18 and 19, the display device 800 includes a first storage container 510, a power supply unit 100, lamps 530, and a display panel 850. Except for the display panel 850, the same as that of the storage container 510, the power supply unit 100, and the lamps 530 illustrated in FIGS. 15 and 16, the same reference numerals are assigned to the same components. And duplicate descriptions are omitted.

The display panel 850 displays an image based on the light provided from the optical unit 650. The display panel 850 includes a lower substrate 820, an upper substrate 830, and a liquid crystal layer (not shown).

The lower substrate 820 is formed in a matrix form and includes pixel electrodes made of a transparent conductive material. The lower substrate 820 includes a thin film transistor for switching a driving signal to the pixel electrode.

The upper substrate 830 is disposed to face the lower substrate 820 at a predetermined interval. The upper substrate 830 includes color pixels for selectively passing only light having a predetermined wavelength. On the entire surface of the upper substrate 830 facing the lower substrate 820, a common electrode made of a transparent conductive material is formed corresponding to the pixel electrode.

The display panel 850 further includes a printed circuit board 825 and a connection film 827. The printed circuit board 825 generates a driving signal for driving the display panel 850. The printed circuit board 825 is electrically connected to one edge of the lower substrate 820 through the connection film 827.

When an electric field is formed between the lower substrate 820 and the upper substrate 830 according to the driving signal applied from the printed circuit board 825, the lower substrate 820 and the upper substrate 830 may be formed. The arrangement of the liquid crystal layer interposed therebetween is changed. Accordingly, the transmittance of light provided from the optical unit 650 is changed so that the display device 800 displays an image of a desired gray scale.

18 and 19, the display device 800 further includes a middle mold 810 and a second storage container 870.

The middle mold 810 is coupled to the first accommodating container 510 while pressing the edge of the optical unit 650 and supports the display panel 850. The second container 870 is coupled to the middle mold 810 or the first container 510. The second storage container 870 covers an edge of the display panel 850 to expose an effective display area of the display panel 850.

According to the present invention as described in detail above, the lamp fixing portion is coupled to the power supply substrate of the power supply unit, the power applying member electrically connects the lamp fixing portion and the power supply element without soldering. Therefore, the process of electrically connecting the lamp fixing part to the power applying member through soldering is omitted, thereby improving the assembly of the power applying member.

In addition, the lamp fixing part or the connector is not assembled to the bottom plate of the storage container but engages with the storage container while being assembled to the power supply unit. Therefore, the step of fixing the lamp fixing part to the bottom plate of the storage container is omitted, thereby improving the assemblability of the power supply unit to the storage container and improving the assembling of the backlight assembly and the display device.

In addition, since the soldering process is omitted, disconnection may be prevented at the soldering part, thereby improving reliability of power connection of the power supply unit, the backlight assembly having the same, and the display device.

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

Claims (20)

A power supply substrate having a plurality of coupling holes and a power output terminal corresponding to each of the coupling holes; A body detachably coupled to each of the coupling holes, a power supply terminal coupled to an electrode part of a lamp disposed at one side of the body, and a power supply terminal extending from the power supply terminal and connected to the power output terminal formed on the power supply board; A plurality of lamp fixing parts including a power applying member including a connection terminal; And And a power supply element disposed on the power supply substrate to output a lamp power voltage to the power output terminal. The power supply unit according to claim 1, wherein the power supply member and the power supply element are electrically connected to each other as the connection terminal presses the power output terminal by an elastic force. The power supply unit according to claim 2, wherein the power supply terminal has a clip shape so that the electrode portion of the lamp is detachably fitted. The method of claim 2, wherein the body is A bottom part of which is coupled to the coupling hole; And And a lamp guide portion protruding from the bottom portion and supporting an end portion of the lamp in which the electrode portion is disposed. The power supply unit according to claim 1, wherein the connection terminals of the lamp fixing parts are electrically connected in parallel with each other by the power supply substrate. The power supply unit according to claim 1, wherein the connection terminals of the lamp fixing parts are individually applied with the lamp power voltage. A power supply substrate integrally formed with a lamp fixing part for fixing an end portion of a lamp in which an electrode part is disposed; A power supply member including a power supply terminal connected to an electrode of the lamp and a connection terminal extending from the power supply terminal and connected to a power output terminal formed on the power supply substrate; And And a power supply element disposed on the power supply substrate to output a lamp power voltage to the power output terminal. A storage container including a bottom plate having first openings formed therein; A first power supply substrate having first coupling holes and power output terminals corresponding to the first openings, and detachably coupled to the first coupling holes to be electrically connected to the power output terminal. A power supply unit including first connectors inserted into the openings, and a power supply element disposed on the first power supply substrate to output a lamp power voltage to the power output terminals; And And lamps including an electrode portion fixedly and electrically connected to the first connectors exposed through the first opening. The backlight assembly of claim 8, further comprising an insulating member disposed between the bottom plate and the power supply unit. The method of claim 8, wherein the first connector A body coupled to a part of the first coupling hole; And And a power applying member including a power applying terminal detachably coupled to the electrode unit and a connection terminal extending from the power applying terminal and connected to the power output terminal. The backlight assembly of claim 10, wherein the body has a lamp guide groove supporting an end portion of the lamp in which the electrode part is formed. The method of claim 8, wherein the first connector protrudes from one surface of the first power supply board facing the bottom plate, The power supply device is a backlight assembly, characterized in that disposed on the opposite surface of the first power supply substrate facing the one surface. The method of claim 8, wherein the first connector protrudes from one surface of the first power supply board facing the bottom plate, The power supply device is a backlight assembly, characterized in that disposed on the one surface. The method of claim 8, wherein the bottom plate is further formed with a second opening corresponding to the other electrode portion of the lamps, A second power supply substrate having second coupling holes corresponding to the second openings, a second power supply substrate detachably coupled to the second coupling holes, inserted into the second openings, and coupled to the other electrode part; And a power discharge unit comprising two connectors. The backlight assembly of claim 14, wherein the power discharging unit grounds the other electrode unit. The backlight assembly of claim 14, wherein the power dissipation unit is electrically connected to the power supply unit. The method of claim 14, A first side mold covering the first connectors; A second side mold covering the second connectors; And And an optical unit disposed on the first side mold and the second side mold, the optical unit improving the optical characteristics of the light provided from the lamps and emitting the light. A power supply substrate on which coupling holes and power output terminals are formed, connectors detachably coupled to the coupling holes, electrically connected to the power output terminals, and inserted into the openings, and disposed on the power supply substrate. A power supply unit including a power supply element for applying a lamp power voltage to the power output terminal; Lamps including an electrode part fixed to the connectors and electrically connected to the connectors; A first storage container including a bottom plate on which the power supply substrate is disposed; And And a display panel disposed on the lamps to display an image based on the light provided from the lamps. The method of claim 18, The first storage container further includes a side wall disposed at the periphery of the bottom plate, A side mold disposed on the sidewall to cover the connectors; An optical unit which is supported by the side mold and which emits light by improving optical characteristics of light provided from the lamps; A middle mold pressing an edge of the optical unit and fastened to the sidewall to support the display panel; And And a second storage container covering an edge of the display panel and coupled to the sidewall. The power supply unit of claim 4, wherein a protrusion is formed at the bottom portion to be coupled to the coupling hole.

Images