KR20060119534A - Back light assembly and liquid crystal display employing the same - Google Patents

Abstract

A backlight assembly and an LCD comprising the same are provided to simplify the manufacturing process and reduce the manufacturing cost, by improving the coupling structure between a lamp assembly and an inverter. A backlight assembly comprises a connector(250), an inverter(200), and a container. The connector is integrated into a case of a lamp assembly(143) in one body. The inverter includes an electrode(205) for coupling with the connector and supplying electric power. The inverter is closely contacted with the case of the lamp assembly in the container. The connector is fixed to an outside surface or an inside surface of the case of the lamp assembly.

Description

Back light assembly and liquid crystal display including the same {Back light assembly and liquid crystal display employing the same}

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

2 is a view showing an inverter coupled to a backlight unit according to an embodiment of the present invention.

3 is a view showing an inverter coupled to a backlight unit according to another embodiment of the present invention.

4 is a diagram illustrating an inverter coupled to a backlight unit according to another embodiment of the present invention.

5 is a view showing an extension cable and an extension adapter according to an embodiment of the present invention.

6A to 6B are views illustrating a coupling relationship between the fixed part and the fixed support part according to the embodiment of the present invention.

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

100: liquid crystal display 110: fixing member

112: window 130: liquid crystal display panel assembly

131: gate tape carrier package 132: data tape carrier package

133: TFT substrate 134: color filter substrate

135: integrated printed circuit board 136: liquid crystal display panel

140: backlight unit 141: optical sheets

142: light guide plate 143: lamp assembly

144: reflector 160: storage container

170: backlight assembly 200, 300, 400: inverter

205, 305a, 305b: electrodes 250, 350a, 350b, 450: connectors

410: fixed portion 460: fixed support

510: extension cable 520: extension adapter

The present invention relates to a liquid crystal display device, and more particularly, to a backlight assembly and a liquid crystal display device having the same, which can simplify a manufacturing process by improving a coupling structure of an inverter for supplying power to a lamp assembly.

It has advantages such as small size, light weight and low power consumption to replace Cathode Ray Tube (CRT), which is one of the display devices that are generally used, and the electrical and optical properties of the liquid crystal injected into the liquid crystal panel Liquid crystal display devices that display information by using them have been actively developed, and have recently played a role as flat panel display devices. In general, the liquid crystal display device is a display device having low power consumption, light weight, and small volume, and the liquid crystal display device has been widely applied to the entire industry, for example, the computer industry, the electronic industry, and the telecommunication industry due to such unique advantages. . In addition, the liquid crystal display device has been applied to various fields such as a display device of a portable computer, a monitor of a desktop computer, and a monitor of a high-definition video device.

The liquid crystal display is largely divided into twisted nematic (TN) and super-twisted nematic (STN) methods, and due to the difference in driving method, an active matrix display method using a switching element and a TN liquid crystal and a passive matrix using STN liquid crystal There is a passive matrix display method.

The big difference between these two methods is that the active matrix display method is used for TFT-LCD, which drives the LCD using the TFT as a switch, and the passive matrix display method does not use transistors, thus requiring a complicated circuit. Do not LCDs using TFTs are widely used in recent years with the spread of portable computers.

Such a liquid crystal display device includes a liquid crystal display panel assembly including a liquid crystal display panel for displaying image information, a backlight unit including a lamp assembly that emits light and a light guide plate having a rectangular shape that directs light toward the liquid crystal display panel, and a liquid crystal display. A storage container housing the display panel assembly and the backlight unit, and a fixing member covering the upper portion of the liquid crystal display panel assembly and fastened to the storage container. Here, it is referred to as a backlight assembly including a backlight unit and a storage container for storing the backlight unit.

Meanwhile, an inverter that receives commercial power and supplies necessary power to the lamp assembly is generally mounted on the rear case of the liquid crystal display or on the inner side of the system housing. In addition, the inverter may be mounted horizontally with the liquid crystal display on the side of the backlight assembly to reduce the thickness of the system housing.

In this case, a screw, welding, or double-sided tape may be used as the mounting means of the inverter. In the case of the screw or the welding, the process is cumbersome and the cost is incurred. There are disadvantages to be careful.

In addition, in order to supply power to the lamp assembly, the connector of the end of the lamp wire branched from the lamp assembly and the electrode of the inverter should be connected. There is a separate work of the branch.

The technical problem to be achieved by the present invention is to provide a connector for receiving the power input to the outer wall in close contact or fixed to the inner surface provided with a lamp assembly and an electrode for supplying power connected to the connector of the lamp assembly. An object of the present invention is to provide a backlight assembly having an improved coupling structure between inverters and a liquid crystal display device having the same.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

The backlight assembly according to an embodiment of the present invention for achieving the above technical problem, an inverter having a connector integral with the case of the lamp assembly, and an electrode for fastening and supplying power to the connector and the inverter to the lamp assembly It includes a storage container for receiving the inverter and the lamp assembly to be in close contact with the case of.

In addition, a liquid crystal display device according to an embodiment of the present invention for achieving the technical problem is a liquid crystal display panel for displaying image information, and a peripheral circuit for processing the gate driving signal and data driving signal required for driving the liquid crystal display panel A liquid crystal display panel assembly having an integrated printed circuit board having a plurality of lamps, the plurality of lamps arranged in parallel, wherein each lamp includes a lamp assembly in which a high voltage part and a ground part are alternately disposed, and a side surface of the lamp assembly. And a light guide plate positioned to guide light emitted from the plurality of lamps and a sidewall formed along an edge of an upper surface thereof to accommodate the lamp assembly and the light guide plate in the sidewall.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with 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 present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the backlight assembly and the liquid crystal display according to the exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention. Referring to FIG. 1, the liquid crystal display device 100 according to an exemplary embodiment of the present invention generally includes a liquid crystal display panel assembly 130, a backlight unit 140, a fixing member 110, and a storage container 160. do. Here, the backlight unit 140 and the storage container 160 accommodating the backlight unit 140 are referred to as a backlight assembly 170.

The liquid crystal display panel assembly 130 includes a TFT substrate 133, a liquid crystal display panel 136 including a color filter substrate 134, a liquid crystal (not shown), a gate tape carrier package 131, and a data tape carrier package. 132 and integrated printed circuit board 135 and the like.

The liquid crystal display panel 136 includes a TFT substrate 133 including a gate line (not shown) and a data line (not shown), a thin film transistor array, a pixel electrode, and the like, a color filter, a black matrix, and a common electrode. And a color filter substrate 134 installed to face the TFT substrate 133.

The gate tape carrier package 131 is connected to each gate line formed on the TFT substrate 133, and the data tape carrier package 132 is connected to each data line (not shown) formed on the TFT substrate 133.

Meanwhile, the integrated printed circuit board 135 may process both the gate driving signal and the data driving signal for inputting the gate driving signal to the gate tape carrier package 131 and the data driving signal to the data tape carrier package 132. Several drive components are mounted.

Referring to FIG. 1, the backlight unit 140 according to an embodiment of the present invention includes optical sheets 141, a light guide plate 142, a lamp assembly 143, a reflecting plate 144, and the like.

Here, the light guide plate 142 guides the light supplied to the liquid crystal display panel assembly 130. The light guide plate 142 is formed of a panel of a plastic-based transparent material such as acrylic to allow the light generated from the lamp to be directed toward the liquid crystal display panel 136 seated on the light guide plate. Accordingly, various patterns for converting the traveling direction of light incident into the light guide plate 142 toward the liquid crystal display panel 136 are printed and formed on the rear surface of the light guide plate 142.

The lamp assembly 143 includes two or more lamps inserted into the side of the light guide plate 142 to emit such light and a lamp reflector surrounding the lamp.

The reflective plate 144 is installed on the lower surface of the light guide plate 142 to reflect the light emitted to the lower portion of the light guide plate 142 to the top. The reflective plate 144 is disposed on the lower surface of the light guide plate 142, and reflects the light not reflected by the minute dot pattern on the rear surface of the light guide plate 142 toward the exit surface of the light guide plate 142 to thereby form the liquid crystal display panel 136. In addition to reducing the light loss of the light incident on the () and at the same time serves to improve the uniformity of the light transmitted to the exit surface of the light guide plate 142.

The optical sheets 141 are installed on the upper surface of the light guide plate 142 to diffuse and collect light transmitted from the light guide plate 142. The optical sheets 141 include a diffusion sheet, a prism sheet, a protective sheet, and the like. A diffusion sheet located between the light guide plate 142 and the prism sheet disperses the light incident from the light guide plate 142 to prevent the light from being partially concentrated. The prism sheet has a triangular prism with a regular arrangement on the upper surface, and is generally composed of two sheets, and each prism array is arranged so as to cross each other at a predetermined angle so that the light diffused from the diffusion sheet is displayed on the liquid crystal display. It serves to condense in a direction perpendicular to the panel 136. As a result, the light passing through the prism sheet almost runs vertically so that the luminance distribution on the protective sheet is uniformly obtained. The protective sheet formed on the prism sheet not only serves to protect the surface of the prism sheet, but also serves to diffuse light in order to make the distribution of light uniform.

Here, in the case of the small liquid crystal display device 100, one lamp is usually installed on the side of the light guide plate 142, but as the liquid crystal display device 100 becomes larger, a plurality of lamps may be provided in one lamp assembly 143 to obtain sufficient luminance. Lamps may be installed. In addition, an inverter (not shown) for supplying power to the lamp of the lamp assembly 143 and the lamp assembly 143 are electrically connected by wires.

The liquid crystal display panel assembly 130 is installed on the protective sheet and is mounted in the storage container 160 together with the backlight unit 140. The storage container 160 has a rectangular shape and has sidewalls formed along the edges of the top surface to accommodate and fix the backlight unit 140 and the liquid crystal display panel assembly 130 in the sidewalls, and include a plurality of sheets. The backlight unit 140 is prevented from bending. The integrated printed circuit board 135 of the liquid crystal display panel assembly 130 is bent along the outer surface of the storage container 160 and seated on the rear surface of the storage container 160. Here, the shape of the storage container 160 may be variously modified according to a method of accommodating the backlight unit 140 or the liquid crystal display panel assembly 130 in the storage container 160.

In addition, the fixing member 110 is disposed to be coupled to the storage container 160 to cover the upper surface of the liquid crystal display panel assembly 130 accommodated in the storage container 160. A window 112 for exposing the liquid crystal display panel assembly 130 to the outside is formed on an upper surface of the fixing member 110.

The fixing member 110 may be coupled to the storage container 160 through a hook (not shown). For example, a hook is formed along an outer surface of the sidewall of the storage container 160, and a hook corresponding to the hook is inserted. A ball (not shown) may be formed on the side of the fixing member 110. Accordingly, as the fixing member 110 descends from the top of the storage container 160, the hook formed in the storage container 160 enters the hook insertion hole of the fixing member 110, and thus the storage container 160 and the fixing member 110. ) Can be fastened. In addition, the combination of the fixing member 110 and the storage container 160 may be modified in various forms.

Hereinafter, the relationship in which the inverter according to the embodiment of the present invention is coupled to the backlight unit will be described in detail with reference to FIG. 2. 2 is a diagram illustrating an inverter coupled to a backlight unit according to an exemplary embodiment of the present invention.

The inverter 200 that receives the commercial power and supplies the required power to the lamp 150 of the lamp assembly 143 is generally mounted on the rear case of the liquid crystal display 100 or on the inner side of the system housing. 2 shows that the inverter 200 is mounted on one side of the backlight unit 140, specifically, one side of the lamp assembly 143. Here, the connector 250 of the lamp 150 for receiving power from the inverter 200 protrudes to one side of the lamp assembly 143, and the connector 250 may be a lamp assembly (using a screw or an adhesive). 143) is firmly attached. In addition, since the conductive wire 155 connecting the lamp 150 and the connector 250 is disposed along the inner wall of the lamp assembly 143, only the protruding connector 250 is visible from the outside of the lamp assembly 143.

On the other hand, the inverter 200 is fastened to the connector 250 is provided with an electrode 205 for supplying power to the lamp 150, the electrode 205 is coupled to the connector 250 after the inverter 200 is ramped It is provided at a position to be in close contact with the assembly 143.

When the electrode 205 of the inverter 200 is inserted into the hole of the connector 250, the inverter 200 is first fixed by the friction between the electrode 205 and the hole, and the inverter 200 is connected to the backlight unit 140. The secondary fixing is completed by being mounted in the storage container 160 together.

3 is a view showing that an inverter according to another embodiment of the present invention is coupled to a backlight unit, wherein the connectors 350a and 350b of the lamp assembly 143 are fixedly installed in the lamp assembly 143. One side of the lamp assembly 143 shows that only holes of the connectors 305a and 305b for inserting the electrodes 305a and 305b of the inverter 300 are exposed.

Here, in order to supply power, two connectors 350a and 350b corresponding to the two electrodes 305a and 305b provided in the inverter 300 are disposed at predetermined intervals, which is a stable fixing of the inverter 300. For Accordingly, the distance between the two connectors 350a and 350b may be appropriately selected in consideration of the length of the inverter 300. In addition, the connectors 350a and 350b may be fixed to the inside of the lamp assembly 143 by screws or adhesives, and the conductor 155 connecting the lamp 150 and the connectors 350a and 350b may be the lamp assembly 143. ) Is disposed along the inner wall.

The two electrodes 305a and 305b of the inverter 300 are disposed at appropriate intervals so as to correspond to the connectors 350a and 350b, respectively, and the holes of the connectors 350a and 350b formed inside the lamp assembly 143. In order to be inserted into the inverter 300 is preferably protruded outward.

When the electrodes 305a and 305b of the inverter 300 are inserted into the holes of the connectors 350a and 350b, the inverter 300 is primarily fixed by friction between the electrodes 305a and 305b and the holes. The secondary fixing is completed by being mounted in the storage container 160 together with the backlight unit 140.

4 is a view illustrating an inverter coupled to a backlight unit according to another embodiment of the present invention, wherein the connector 450 and the fixed support 460 of the lamp assembly 143 are fixed to the inside of the lamp assembly 143. In one side of the lamp assembly 143, a hole of the connector 450 for inserting an electrode of the inverter 400 and a hole of the fixed support part 460 are exposed.

The inverter is for supplying a stable high voltage to the lamp, and is not an essential component and may be manufactured by a separate manufacturing process. Accordingly, various inverters may exist and an appropriately selected inverter may be applied according to a situation. When the standard connector 250 as shown in FIG. 2 is not used, the inverter 200 using the standard electrode 205 may be used. It can be difficult to apply. For example, when the inverter is mounted on the rear case of the liquid crystal display device 100 or the inner side of the system housing, the lamp 150 and the inverter may be connected by separate conductors, and the conductors may be connected to the lamp assembly. It is exposed to the outside of 143.

As shown in FIG. 5, an extension cable 510 may be used to connect the lamp 150 and the inverter 400. The extension cable 510 may include an electrode 512, a conductor 516, and a connector 514. It is composed. The electrode 512 of the extension cable 510 is inserted into the hole of the connector 450 formed on one side of the lamp assembly 143 and fastened to the connector 450 provided in the lamp assembly 143 to thereby secure the lamp 150. ) To supply power. The conductive wire 516 of the extension cable 510 connects the electrode 512 of the extension cable 510 and the connector 514 of the extension cable 510, and the connector 514 of the extension cable 510 is It is fastened with the electrode 405 of the inverter 400 serves to receive power from the inverter 400

While extension cable 510 provides usability depending on the mounting location of inverter 400, extension adapter 520 of FIG. 5 may be used for connection to a conventional inverter 200 as in FIG. That is, by inserting the electrode 522 formed in the expansion adapter 520 into the hole of the connector 450 of the lamp assembly 143, the connector 524 protrudes to one side of the lamp assembly 143, and the protruding connector 524. The inverter 200 and the lamp assembly 143 may be coupled and fixed as shown in FIG. 2 by inserting an electrode of the inverter 200 into the hole.

The fixing part 410 of the inverter 400 is inserted into the hole of the fixed support part 460 formed in FIG. 4 to more firmly fix the coupling between the inverter 400 and the lamp assembly 143. FIGS. 6B illustrates a coupling relationship between the fixed part 410 and the fixed support part 460 according to an embodiment of the present invention. Here, the distal end of the fixing part 410 is an oblique form to facilitate insertion, and shows that the separation preventing protrusion 415 is formed to prevent the separation from the fixing support 460. In order to accommodate the departure preventing protrusion 415 of the fixing part 410 and to prevent the departure, the separation preventing protrusion 465 is formed in the inside of the fixing support part 460, which is easy to insert the fixing part 410. It is preferable that the departure is wedge-shaped so as not to be easy.

Therefore, as shown in FIG. 6B, the beveled end of the fixing part 410 and the beveled surface of the anti-separation protrusion 465 formed inside the fixing support part 460 slide each other to prevent the anti-separation protrusion 415 of the fixing part 410 from sliding. It is accommodated inside the departure prevention protrusion 465 of the fixed support 460, and once received, the departure prevention protrusion 465 of the fixed support 460 fixes the release prevention protrusion 415 of the fixed part 410 by It prevents the separation of the fixing portion 410.

Thus, when the electrode 405 of the inverter 400 is inserted into the hole of the connector 450, the inverter 400 is first fixed by the friction between the electrode 405 and the hole, and the fixing part 410 is fixed to the fixed support part ( When inserted into the hole of the 460, the inverter 400 is secondarily fixed by the fastening between the fixing part 410 and the fixing support part 460, the friction and separation prevention projections (415, 465), the inverter 400 Is mounted on the storage container 160 together with the backlight unit 140 to complete the third fixing.

For reference, the separation preventing protrusions 415 and 465 formed inside the fixing part 410 and the fixing support part 460 may be made of an elastic material such as plastic or rubber. This is to ensure that the fixing portion 410 can be easily inserted, if you want to use a material with a relatively low elasticity, such as metal, the departure prevention projections (415, 465) of the fixing portion 410 and the fixed support 460 It is good to decrease the depth of).

In addition, the fixing part 410 also the electrodes 205, 305a, 305b, 405 of the inverters 200, 300, and 400 and the connectors 250, 350a, 350b, and 450 of the lamp assembly 143 according to the embodiment of the present invention. ) And the fixed support 460, the coupling between the inverters 200, 300, 400 and the connectors 250, 350a, 350b, 450 may be more robust.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

As described above, according to the backlight assembly and the liquid crystal display including the same, a connector for receiving input power is provided on the outer wall in close contact or on the inner surface of the lamp assembly and the connector of the lamp assembly. By providing an improved coupling structure between inverters with connected and powered electrodes, it simplifies the manufacturing process, reduces manufacturing costs, and prevents manufacturing errors that may occur due to insufficient lamp wire processing. .

Claims (5)

A connector integral with the case of the lamp assembly; An inverter having an electrode for fastening with the connector and supplying power; And And a storage container accommodating the inverter and the lamp assembly to closely contact the case of the lamp assembly. The method of claim 1, The connector is fixed to the outer surface or the inner surface of the case of the lamp assembly, characterized in that provided with. The method of claim 1, The inverter has a backlight assembly characterized in that it has a fixing portion formed with a separation preventing projection so that the fastening with the connector is not separated. The method of claim 3, wherein The lamp assembly includes a fixing support integral with the case of the lamp assembly for receiving the fixing portion and supporting the separation preventing projection to prevent the inverter from being separated. A liquid crystal display device comprising the backlight assembly of claim 1.

Images