KR20080010836A - Lamp supporter, backlight unit and liquid crystal display having this - Google Patents

Abstract

A lamp supporter, a backlight unit and a liquid crystal display having the same are provided to form fixing parts for fixing lamps and support parts for separately supporting optical sheets, to control gaps between the lamps easily. Fixing members(110) fix lamps. Support members(120) support an upper structure. The fixing members and the support members are formed separately. The fixing member includes a flat base(112), a holder part(111) formed at one side of the base for fixing the lamp, and a coupling part(113) formed at the other side of the base. The support member includes a flat base(122), a pillar part(121) formed at one side of the base for supporting the upper structure, and a coupling part(123) formed at the other side of the base.

Description

Lamp supporter, backlight unit and liquid crystal display device having the same {LAMP SUPPORTER, BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY HAVING THIS}

1 is a perspective view showing a lamp supporter according to an embodiment of the present invention.

2 is a cross-sectional view showing a lamp supporter according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing various modifications of the fastening portion of the lamp supporter according to an embodiment of the present invention.

4 is a cross-sectional view showing a backlight unit according to an embodiment of the present invention.

5 is a cross-sectional view of the lamp unit of FIG.

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

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

100: lamp supporter 110: fixing member

120: support member 200: backlight unit

210: optical sheet 220: lamp

230: lower chassis 240: lamp clamp

610: upper chassis 620: liquid crystal display panel

630: mold frame

The present invention relates to a lamp supporter, and more particularly, to a lamp supporter separately formed corresponding to each lamp so as to be compatible with various lamp arrangements, a backlight unit having the same, and a liquid crystal display device.

Recently, flat panel displays such as liquid crystal displays (LCDs) and plasma display panels (PDPs) are rapidly developing in place of cathode ray tubes (CRTs). Among the flat panel display devices, since the liquid crystal display device does not emit light by itself, a backlight unit is required to provide light for displaying an image on the rear surface so that the display contents can be visually recognized.

The direct type of the backlight unit is a method of directly dimming the rear surface of the liquid crystal display by placing a light source under the liquid crystal display panel. This can secure high luminance, and is generally used for large and medium sized liquid crystal display panels.

The direct type backlight unit includes a lamp as a light source, an optical sheet disposed above the lamp, and a lamp supporter for fixing the lamp and supporting the optical sheet.

However, the lamp supporter according to the related art has a problem in that the fixing part for fixing the lamp and the support part for supporting the optical sheet are integrally formed. In other words, if the lamp layout structure is improved or changed for the purpose of improving performance and developing a new product, a new lamp supporter should be manufactured accordingly. The manufacturing cost of the liquid crystal display device using the same is expensive because of the high cost and time required to manufacture the mold. There is a problem that increases the development period is increased.

The present invention is to solve the above problems, by separating the fixing portion for fixing the lamp and the support portion for supporting the optical sheet is easy to adjust the gap between the lamps can be used regardless of the lamp arrangement structure It is an object of the present invention to provide a lamp supporter, a backlight unit having the same, and a liquid crystal display device.

The lamp supporter according to the present invention for achieving the above object comprises at least one fixing member for fixing the lamp and at least one supporting member for supporting the upper structure, each holding member and the supporting member is separated It is characterized in that the formed.

The fixing member may include a flat base, a holder part formed on one surface of the base to fix the lamp, and a fastening part formed on the other surface of the base.

The support member may include a flat base, a pillar portion formed on one surface of the base to support the upper structure, and a fastening portion formed on the other surface of the base.

A backlight unit according to the present invention for achieving the above object comprises a lamp and an optical sheet, and having at least one fixing member for fixing the lamp and at least one support member for supporting the optical sheet. At least one lamp supporter, characterized in that each of the fixing member and the support member of the lamp supporter is formed separately.

According to an exemplary embodiment of the present invention, a liquid crystal display device includes a lamp and an optical sheet, and includes at least one fixing member for fixing the lamp and at least one support member for supporting the optical sheet. At least one lamp supporter, characterized in that each of the fixing member and the support member of the lamp supporter is characterized in that it is formed separately.

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

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a perspective view showing a lamp supporter according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a lamp supporter according to an embodiment of the present invention.

1 and 2, the lamp supporter 100 according to the present invention includes at least one fixing member 110 for fixing the lamp which is a light source and at least one support member 120 for supporting the upper structure. The fixing member 110 and the supporting member 120 are formed separately.

Fixing member 110 is formed on a flat base (112), one surface of the base 112 and the holder portion 111 for fixing the lamp and the other surface of the base 112 to the lower chassis It includes a fastening portion 113 to be coupled. Here, each of the components 111, 112 and 113 constituting the fixing member 110 is preferably made of an integral mold formation.

The holder 111 serves to grip and fix a lamp fitted to a partial region of the body by elastic force. Such holder portion is preferably formed in a U shape using an elastic body.

The support member 120 is formed on a flat base 122, one surface of the base 122, and formed on the other surface of the pillar portion 121 and the base 122 to support the upper structure and coupled to the lower chassis. It includes a fastening portion 123 for.

The pillar portion 121 has a tip region of the body to support the upper structure to a predetermined height. The pillar portion 121 is preferably formed so that the cross-sectional area is increased from the front end to the proximal end to favor the weight distribution. For example, it may be formed of a cone, a truncated cone, a triangular pyramid, a truncated triangular pyramid, or the like.

Figure 3 is a cross-sectional view showing various modifications of the fastening portion of the lamp supporter according to an embodiment of the present invention.

Referring to FIG. 3, the fastening parts 113 and 123 formed under the fixing member 110 and the supporting member 120 may stably mount the fixing member 110 or the supporting member 120 to the lower chassis. If so, it is not limited to a particular structure and form. For example, a hook 113a bent to both sides is formed at the end of the protrusion extending from the bottom of the base as shown in (a), or a pair of protrusions extending from the bottom of the base as shown in (b). Hooks 113b protruding from both ends at the ends of are formed, or as shown in (c), a screw thread is formed in the projection connected from the lower part of the base, and a nut 113c corresponding thereto is provided, or as in (d). An adhesive layer 113d may be formed under the base.

4 is a cross-sectional view illustrating a backlight unit according to an exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view of the backlight unit of FIG. 4 with different lamp spacings.

Referring to FIG. 4, the backlight unit 200 includes an optical sheet 210, a lamp 220, a lower chassis 230, and a lamp supporter 100 mounted on the lower chassis 230.

The optical sheet 210 is disposed in front of the lamp 220 to uniform the luminance distribution of the light emitted upward. The optical sheet 210 may include a diffusion sheet 211, a first prism sheet 212, and a second prism sheet 213 from below. Here, the diffusion sheet 211 has a scattering pattern, and scatters the light incident from the lamp 220 in the upper direction to diffuse, and the first and second prism sheets 212 and 213 are respectively disposed on the upper surface thereof. It has a prism pattern formed in a direction crossing each other, and serves to condense the light emitted in the upper direction by vertically changing the light incident obliquely from the light incident from the diffusion sheet 211.

In addition, the optical sheet 210 may further include a compensation sheet (not shown) for reducing the loss of light emitted from the first and second prism sheets 212 and 213 to increase the brightness and provide the wide viewing angle characteristic. Can be.

Lamp 220 as a light source is a cold cathode fluorescent lamp comprising a glass tube filled with a discharge gas in the interior space, a fluorescent material is applied to the inner surface, and a pair of electrodes formed on both sides of the glass tube; CCFL) is effective. Here, the discharge gas for generating primary light may include a rare gas such as argon, neon, xenon, or a mixed gas containing argon, neon, xenon, and the like and a predetermined amount of mercury, and the fluorescent material for generating secondary light may include white light. The light emitting device may include phosphors having three wavelength bands of red, green, and blue to emit light.

In the present embodiment, a cold cathode fluorescent lamp is used as the light source 220, but the present invention is not limited thereto, and various light sources such as an external electrode fluorescent lamp (EEFL) may be used.

The lower chassis 230 is formed in a box shape of a rectangular parallelepiped with an upper surface open to form an accommodation space having a predetermined depth therein. The lower chassis 230 includes a flat bottom surface and a side wall portion protruding upward from an edge of the bottom surface. Here, the reflecting means 231, such as a reflecting layer formed by applying a material having a high reflectance such as Ag, Al, Pd, Rh or the like, or a reflecting plate on which the reflecting layer is formed, may be further disposed in the storage space, that is, the bottom surface and the sidewall portion. have.

In particular, a plurality of mounting holes (not shown) are formed on the bottom surface of the lower chassis 230 at the same position and number as the position and number of the lamp supporters 100.

The lamp supporter 100 includes at least one fixing member 110 and an optical sheet 210 to fix the lamp 220 so that the arrangement intervals of the plurality of lamps 220 mounted on the backlight unit 200 are kept constant. At least one support member 120 for supporting the optical sheet 210 to maintain a constant distance between the lamp 220 and the). In this case, the fixing member 110 and the supporting member 120 are manufactured to be separated, and each fixing member 110 is disposed to correspond to each lamp 220. That is, it is preferable to use a separate lamp supporter as described above.

The lamp supporter 100 is mounted on the lower chassis 230 to support the upper structure, that is, the optical sheet 210 so that it does not fall, and to uniformly adjust the luminance distribution of the light while adjusting the arrangement interval between the lamps 220 as desired. Let's do it. At this time, a hook forming a fastening part 113/123 is formed at a lower portion of the fixing member 110 and the supporting member 120 of the lamp supporter 100, and the hook is inserted into the mounting hole of the lower chassis 230. By providing the elastic force, the two components are stably combined. Of course, the coupling structure is not limited to the hook method, for example, may have a coupling structure of a variety of methods, such as a screw method, an adhesive method.

Since the lamp supporter 100 used in the backlight unit 200 according to the present embodiment is manufactured by separating the fixing member 110 and the supporting member 120, the lamp supporter 100 may be applied to various backlight units having different lamp arrangement structures. Can be.

For example, the arrangement interval A between the lamps 220 and the separation distance B between the optical sheet 210 and the lamp 220 in the backlight unit 200 determine the uniformity of the bright line and the luminance. This is a very important factor. In general, since the most effective A: B value is about 1.7, most backlight units are designed to satisfy this range. Among them, the B value, that is, the separation distance between the optical sheet 210 and the lamp 220 may vary. Method For example, it can be easily adjusted by cutting the mounting hole formed in the lower chassis 230, but the A value, that is, the arrangement interval between the lamps 220 is not easy to adjust. That is, in the conventional backlight unit, since the fixing member and the supporting member of the lamp supporter are integrally formed and arranged at predetermined intervals, there is an inconvenience in that a lamp supporter corresponding to the interval needs to be newly manufactured when the interval between the lamps is changed. . However, in the backlight unit of the present embodiment, as shown in FIG. 5, since the fixing member 110 and the supporting member 120 of the lamp supporter 100 are manufactured in a separate type corresponding to each lamp 220, the distance between the lamps 220 is increased. It can be used regardless of change. That is, when the distance between the lamp 220 is changed from L1 to L2, a mounting hole corresponding to the gap is newly formed in the lower chassis 230, and the detachable lamp supporter 100 may be mounted in the changed mounting hole. have. Therefore, the present invention can freely adjust the distance between the lamp 220 only by changing the position of the mounting hole of the lower chassis 230.

Next, a liquid crystal display device using the backlight unit according to the present invention described above will be described. At this time, the description overlapping with the configuration of the above-described backlight unit 200 will be omitted or briefly described.

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

Referring to FIG. 6, the liquid crystal display includes a liquid crystal display panel 620, a backlight unit 200 disposed under the liquid crystal display panel 620, and various electrical signals required for driving the liquid crystal display panel 620. It includes a Control Printed Circuit Board (Control PCB) (not shown) for generating a.

A plurality of pixels are formed in the liquid crystal display panel 620 to display an image. Although not shown, the liquid crystal display panel 620 includes a liquid crystal layer interposed between the upper substrate and the lower substrate disposed to face each other.

The upper substrate includes a plurality of red (R), green (G), and blue (B) color filters that implement color by coloring light incident in the pixel region, and a plurality of black matrices that block light incident in the non-pixel region. Is a transparent substrate arranged in a lattice structure. A common electrode formed of a transmissive conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO) is formed on an opposite surface of the upper substrate.

The lower substrate is a transparent substrate in which a plurality of thin film transistors (TFTs), which are switching elements, are arranged in a lattice structure. A data line is connected to a source electrode of the thin film transistors, a gate line is connected to a gate electrode, and a pixel electrode formed of a light transmissive conductive material such as ITO or IZO is connected to a drain electrode.

The data PCB 621 and the gate PCB 622 are connected to the liquid crystal display panel 620, and the data PCB 621 is a control PCB (not shown) through a flexible printed circuit (FPC) (not shown). Is electrically connected to) to receive a predetermined signal. The data PCB 621 is electrically connected to a data line formed on the liquid crystal display panel 620 to transfer a gray voltage to each pixel, and the gate PCB 622 is electrically connected to a gate line. The gate on / off voltage is transferred to the pixel. Of course, the data PCB 621 and the gate PCB 622 may be integrated into one.

The backlight unit 200 provides the image display light to the liquid crystal display panel 620. The backlight unit 200 includes an optical sheet 210, a lamp 220, a lower chassis 230, and a lamp supporter 100 mounted on the lower chassis 230.

The lamp 220 is provided with electrode terminals formed at both sides of the lamp clamp 240 to receive driving power.

The lamp supporter 100 includes at least one fixing member 110 for fixing the lamp 220 which is a light source and at least one supporting member 120 for supporting the optical sheet 210. The fixing member 110 and the supporting member 120 are formed separately. That is, it is preferable to use the above-described separate lamp supporter 100.

Although the backlight unit 200 includes four cold cathode fluorescent lamps 220 in the present embodiment, the present invention is not limited thereto, and the light source 220 may be variously selected, and the number of the light sources 220 may be different. 4 or less may be used depending on the size and characteristics of the liquid crystal display panel 620.

In the storage space formed by the combination of the upper chassis 610 and the lower chassis 230, a mold frame 630 which protects the edge of the liquid crystal display panel 620 which is weak to impact and fixes the mounting position of the optical sheet 210. ) Is accepted.

The mold frame 630 is formed in a rectangular frame shape including an opening portion and a side wall portion surrounding the mold portion 630. In the upper region of the sidewall portion, a plurality of protrusions protruding in the inward direction of the sidewall portion or a stepped portion formed to enclose the edge in the inner circumferential direction of the sidewall portion may be provided to form a seating portion on which the liquid crystal display panel 620 is seated. The mold frame 630 is formed to surround the liquid crystal display panel 620 which is vulnerable to impact, thereby preventing the mold frame 630 from being damaged, and preventing the mold frame 630 from being separated by storing the optical sheet 210.

In the liquid crystal display device having such a configuration, the present invention provides a lamp supporter in which the fixing member 110 for fixing the lamp 220 and the support member 120 for supporting the optical sheet 210 are separately separated. 100) is used. As a result, the distance between the lamps 220 may be easily adjusted to be compatible with various liquid crystal display devices having different lamp arrangement structures.

As described above, the above embodiments are disclosed for purposes of illustration, and those skilled in the art will appreciate that various modifications, improvements, substitutions, and additions may be made without departing from the spirit of the present invention. Accordingly, the technical scope of the present invention is defined by the appended claims.

As described above, since the lamp supporter according to the present invention is formed by separating the fixing part for fixing the lamp and the support part for supporting the optical sheet, it is easy to adjust the gap between the lamps and various liquid crystals having different lamp arrangement structures. It can be used for a display device. Therefore, when developing a new liquid crystal display device having a different lamp arrangement structure, the lamp supporter of the present invention, which can easily adjust the gap between lamps, can reduce development costs and shorten the development period.

Claims (10)

At least one fixing member for fixing the lamp and At least one support member for supporting the superstructure, The lamp supporter, characterized in that each holding member and the support member is formed separately. The method according to claim 1, The fixing member, With a flat base, A holder part formed on one surface of the base to fix the lamp; Lamp supporter comprising a fastening portion formed on the other surface of the base. The method according to claim 1, The support member, With a flat base, A pillar portion formed on one surface of the base to support the upper structure; Lamp supporter comprising a fastening portion formed on the other surface of the base. A backlight unit comprising a lamp and an optical sheet, At least one fixing member for fixing the lamp and At least one lamp supporter having at least one support member for supporting the optical sheet, Each of the fixing member and the supporting member of the lamp supporter is formed separately. The method according to claim 4, The fixing member, With a flat base, A holder part formed on one surface of the base to fix the lamp; And a fastening part formed on the other surface of the base. The method according to claim 5, The holder unit is a backlight unit, characterized in that formed in a U shape using an elastic body. The method according to claim 4, The support member, With a flat base, A pillar portion formed on one surface of the base to support the upper structure; And a fastening part formed on the other surface of the base. The method according to claim 7, The pillar unit is characterized in that the cross-sectional area is formed to increase from the front end to the base end. The method according to claim 5 or 7, The fastening unit has a coupling structure of any one of a hook method, a screw method, and an adhesive method. A liquid crystal display device comprising a lamp and an optical sheet, At least one fixing member for fixing the lamp and At least one lamp supporter having at least one support member for supporting the optical sheet, And each of the fixing member and the supporting member of the lamp supporter are formed separately.

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