KR20060021074A - Liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device, comprising: a liquid crystal panel for forming an image; A light guiding unit disposed on a rear surface of the liquid crystal panel; A lamp unit having a lamp unit disposed on at least one side of the light guide unit and an electrode unit formed at an end of the lamp unit; A wire connected to the electrode to supply power to the lamp unit; And a mold frame having a groove for receiving the wire and a fixing portion provided adjacent to the electrode to fix the wire in the groove. This makes it possible to more stably fix the wire for supplying power to the lamp unit, thereby preventing a short circuit between the portion where the lamp unit and the wire are connected.

Description

Liquid crystal display

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

FIG. 2 is a schematic diagram of a lamp unit used in the liquid crystal display of FIG. 1;

3 is a perspective view illustrating main parts of a wire fixed to a mold frame of the liquid crystal display of FIG. 1.

* Explanation of symbols for the main parts of the drawings

10 liquid crystal panel 11 thin film transistor substrate

12 color filter substrate 20 mold frame

21: lamp housing 23: groove

24: fixing protrusion 30: backlight assembly

31 lamp unit 32 lamp reflector

33: wire 35: light guide unit

40: bottom chassis 50: top chassis

90 driver integrated circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device in which a wire for supplying power to a lamp unit is more stably fixed to prevent a short circuit between a portion where the lamp unit and the wire are connected.

In general, a liquid crystal display is a device for displaying a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix according to image signal information. The panel forms an image.

Such a liquid crystal display device includes a liquid crystal panel for forming Mars, a backlight assembly for supplying light to the liquid crystal panel, and a mold frame for receiving and fixing the backlight assembly to the rear surface of the liquid crystal panel.

The backlight assembly generally includes a direct light source for directing the liquid crystal panel by placing a light source on the rear surface of the liquid crystal panel, and an edge for indirectly irradiating the liquid crystal panel by reflecting and diffusing light to a light guiding unit with a light source on at least one side of the liquid crystal panel. Method).

Referring to the edge method as an example, the backlight assembly includes a lamp unit for generating light and a light guide unit for guiding the light generated from the lamp unit to the rear surface of the liquid crystal panel. The lamp unit may include a lamp unit and an electrode unit, and the backlight assembly may further include an inverter for supplying AC power to the lamp unit, and a wire for electrically connecting the inverter and the lamp unit. The wire is soldered to the electrode portion of the lamp unit.                         

The mold frame is first accommodated with a lamp unit and then mounted with a light guide unit. Then, the liquid crystal panel is fixed onto the light guiding unit, and then the top chassis and the barb chassis are mutually coupled to accommodate them, thereby completing the liquid crystal display.

However, the external tension is repeatedly applied to the wires connected to the electrode portions of the lamp unit during the module assembly process or the transportation process, thereby causing a short circuit in the soldering connection of the electrode portions and the wires.

Accordingly, an object of the present invention is to provide a liquid crystal display device in which a wire for supplying power to a lamp unit is more stably fixed, thereby preventing a short circuit between a portion where the lamp unit and the wire are connected.

According to the present invention, there is provided a liquid crystal display device comprising: a liquid crystal panel for forming an image; A light guiding unit disposed on a rear surface of the liquid crystal panel; A lamp unit having a lamp unit disposed on at least one side of the light guide unit and an electrode unit formed at an end of the lamp unit; A wire connected to the electrode to supply power to the lamp unit; And a mold frame having a groove for accommodating the wire and a fixing portion provided adjacent to the electrode portion to fix the wire in the groove.

Here, the fixing part is preferably a fixing protrusion protruding in the horizontal direction of the direction in which the wire is inserted into the groove to prevent the wire from being separated from the groove.

In addition, the fixing part may provide a resistance to the tension in the longitudinal direction applied to the wire.

In addition, the fixing portion is preferably formed at the beginning of the wire is connected to the electrode portion is received in the groove.

Here, it is preferable that the fixing part is formed within a range of about 5 cm from the point where the wire starts to be received in the groove.

In addition, the fixing part may be a fixing groove formed in the groove, and the wire may be inserted into the fixing groove to be prevented from being separated from the groove.

Accordingly, the wire for supplying power to the lamp unit can be more stably fixed to prevent a short circuit between the portion where the lamp unit and the wire are connected.

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

Prior to the description, in the various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, only the configuration different from the first embodiment will be described. do.

In addition, the liquid crystal display shown in the present specification has an edge type backlight assembly by way of example and will be schematically shown with the features highlighted.                     

As shown in FIG. 1, the liquid crystal display according to the first exemplary embodiment of the present invention includes a liquid crystal panel 10 for forming an image, a driver integrated circuit 90 for driving the liquid crystal panel 10, and a liquid crystal. The backlight assembly 30 for irradiating light to the rear surface of the panel 10, the mold frame 20 housing the backlight assembly 30 and supporting the edge of the liquid crystal panel 10, and the mold frame 20 are accommodated. A bottom chassis 40 supporting the top chassis 40 and a top chassis 50 coupled to the bottom chassis 40 to cover the entire surface of the liquid crystal panel 10 are included.

The liquid crystal panel 10 is injected between the thin film transistor substrate 11, the color filter substrate 12 attached to face the thin film transistor substrate 11, and the thin film transistor substrate 11 and the color filter substrate 12. It includes a liquid crystal (not shown). The liquid crystal (not shown) is injected between the thin film transistor substrate 11 and the color filter substrate 12 and then sealed. In addition, the liquid crystal panel 10 further includes a polarizer (not shown) attached to the front surface of the color filter substrate 12 and the rear surface of the thin film transistor substrate 11 such that light passing through the liquid crystal panel is cross-polarized. In the liquid crystal panel 10, liquid crystal cells forming a pixel unit are arranged in a matrix form, and an image is formed by adjusting light transmittance of liquid crystal cells according to image signal information transmitted from the driver integrated circuit 90.

In the thin film transistor substrate 11, a plurality of gate lines and a plurality of data lines are formed in a matrix form, and pixel electrodes and thin film transistors (TFTs) are formed at intersections of the gate lines and the data lines. The signal voltage transmitted from the driver integrated circuit 90 is applied between the pixel electrode and the common electrode of the color filter substrate, which will be described later, through the thin film transistor, and the liquid crystal between the pixel electrode and the common electrode is aligned in accordance with the signal voltage to transmit light. Will be determined.

The color filter substrate 12 is formed with a color filter and a common electrode (Indium Tin Oxide (ITO)) made of RBG pixels in which a predetermined color is expressed while light passes. The color filter substrate 12 has a smaller area than the thin film transistor substrate 11, and a portion where the color filter substrate 12 and the thin film transistor substrate 11 overlap with each other becomes a display area of the liquid crystal panel 10 and does not overlap. The peripheral area of the non-display area becomes a non-display area of the liquid crystal panel.

The driver integrated circuit 90 has terminals for electrically connecting, and is mounted on the thin film transistor substrate 11 to end portions of the gate line and the data line of the thin film transistor substrate 11 extending from the display area to the non-display area. Connected.

The backlight assembly 30 includes a light guide unit 35 disposed on the rear surface of the liquid crystal panel 10, a lamp unit 31 for generating light, a lamp reflector 32 surrounding the lamp unit 31, and a lamp unit. A wire 33 for supplying power to the 31.

As illustrated in FIG. 2, the lamp unit 31 includes a lamp unit 311 that emits light and an electrode unit 312 formed at an end of the lamp unit 311. The electrode part 312 is connected to the wire 33 and connected to an inverter (not shown) to receive power. Here, the electrode part 312 and the wire 33 are soldered and connected.

In the exemplary embodiment of the present invention, a cold cathode fluorescent lamp (CCFL) is used as the lamp unit 31, but various lamps such as a hot cathode fluorescent lamp or an external electrode fluorescent lamp (EEFL) are used. May be used.                     

The light guiding unit 35 is disposed on the rear surface of the liquid crystal panel 10 with the lamp unit 31 along at least one side thereof, and guides the light generated from the lamp unit 31 to the rear surface of the liquid crystal panel 10 ( 351, a reflector 353 disposed on the rear surface of the light guide plate 351 and reflecting light leaked from the light guide plate 351 back toward the liquid crystal panel 10, between the light guide plate 351 and the liquid crystal panel 10. The optical sheet 352 is disposed to diffuse and condense the light directed toward the liquid crystal panel 10.

The light guide plate 351 is irradiated to the incident surface receiving light from the lamp unit 31, the emitting surface disposed at a right angle to the incident surface and arranged parallel to the liquid crystal panel 10, and irradiated from the lamp unit 31 to the incident surface. It has a back surface with a pattern formed so that light travels to the exit surface. Accordingly, the light guide plate 351 changes the light irradiated from the lamp unit 31 disposed along the side of one side of the light guide plate 351 to the plane of incidence from the lamp unit 31 to planar light, and then emits the liquid crystal panel 10 through the emission surface. Will be delivered evenly). As the material of the light guide plate 351, a high strength PMMA (Polymethylmethacrylate) is used that does not easily deform or break and has a high transmittance.

The reflector 353 reflects the light transmitted through the light guide plate 351 in the opposite direction of the liquid crystal panel 10 back to the light guide plate 351 to reduce the loss of light and to move from the light guide plate 351 to the liquid crystal panel 10. It contributes to improving the uniformity of transmitted light.

The optical sheet 352 is a diffusion sheet that partially diffuses light from the light guide plate 351 to the liquid crystal panel 10 to diffuse light so that spots do not occur in the liquid crystal panel 10, thereby further improving the uniformity of light. And a prism sheet for improving the luminance by allowing the light passing through the diffusion sheet to proceed vertically. In addition, it may further include a protective sheet for protecting the diffusion sheet and the prism sheet sensitive to dust and scratches and to prevent the external impact or foreign substances from entering.

The mold frame 20 supports the edge of the liquid crystal panel 10 and accommodates the backlight assembly 30 and fixes it to the rear surface of the liquid crystal panel 10. The mold frame 20 has a substantially rectangular parallelepiped box shape, and the lamp unit 31 and the lamp reflector 32 are accommodated in the lamp accommodating portion 21 formed on the inner side, and then the light guide unit 35 is mounted. In addition, as shown in FIG. 3, the mold frame 20 has a wire inlet hole 22 for the wire 33 connected to the electrode portion 312 of the lamp unit 31 to escape to the outside. Grooves 23 for receiving and guiding the wires 33 exiting the wire inlet holes 22 are formed on the outer surface of the mold frame 20. In addition, at the beginning of the groove 23 in which the wire 33 exits the wire inlet hole 22, at least one fixing protrusion 24 protrudes in the transverse direction in the insertion direction of the wire 33 so that the groove ( The wire 33 housed in 23 is prevented from being separated. The fixing protrusions 24 are formed in the grooves 23 within a range of about 5 cm from the wire inlet hole 22. In addition, the fixing protrusion 24 provides a resistance to the tension in the longitudinal direction applied to the wire (33).

That is, the wire 33 is fixed by the fixing protrusion 24 to prevent the flow of the wire 33, in particular, the flow caused by the longitudinal tension applied to the wire 33, thereby preventing the wire 33 and the electrode portion 312 from being moved. It is possible to prevent the short circuit of the soldering connection.

Here, since the fixing protrusion 24 which fixes the wire 33 is formed adjacent to the electrode part 312 which connects with the wire 33, the short circuit of the soldering connection of the wire 33 and the electrode part 312 is seen. Can be effectively prevented. That is, when the fixing protrusion 24 fixing the wire 33 is far from the connecting portion of the wire 33 and the electrode portion 312, the wire 33 between the fixing protrusion 24 and the electrode portion 312. This is because a separate new flow may occur.

The top chassis 50 has a top front part 52 having a display window so that the effective surface of the liquid crystal panel 10 is exposed to the outside, and a top body part 51 which receives the mold frame 20 and is coupled with the bottom chassis 40. Has

The bottom chassis 40 accommodates and supports the mold frame 20 and is combined with the top chassis 50 to complete the liquid crystal display.

With this configuration, the operation and effect of the liquid crystal display according to the first exemplary embodiment of the present invention will be described. The wire 33 for supplying power to the lamp unit 31 may be provided with the electrode portion 312 of the lamp unit 31. By fixing to the mold frame 20 at a position adjacent to), the soldering connection of the wire 33 and the electrode portion 312 can be prevented from being shorted due to the flow of the wire 33 and the tension in the longitudinal direction.

In the liquid crystal display according to the second exemplary embodiment of the present invention, as shown in FIG. 4, the mold frame 20 may be fixed by fixing the wire 33 instead of the fixing protrusion 24 used in the first exemplary embodiment. A method of inserting and fixing the wire 33 into the fixing groove 25 formed in the groove 23 is used.

Like the fixing protrusions 24 of the first embodiment, such fixing grooves 25 are also formed in the grooves 23 within a range of about 5 cm from the beginning of the grooves 23, that is, the wire inlet hole 22. In addition, the wire 33 accommodated in the groove 23 is prevented from being detached, thereby providing resistance to the longitudinal tension applied to the wire 33.

Accordingly, the wire 33 is fixed to prevent the flow of the wire 33, in particular, the flow caused by the longitudinal tension applied to the wire 33, thereby preventing short circuit of the soldering connection between the wire 33 and the electrode portion 312. You can do it.

Unlike the above-described embodiments, the mold frame 20 may use various other methods such as changing the thickness of the wire 33 to generate a friction force with the groove 23 by fixing the wire 33. have. That is, any method may be used as long as the fixing means for fixing the wire 33 can be provided adjacent to the electrode portion 312.

As described above, according to the present invention, it is possible to provide a liquid crystal display device in which a wire for supplying power to the lamp unit is more stably fixed, thereby preventing a short circuit between a portion where the lamp unit and the wire are connected.

Claims (6)

In the liquid crystal display device, A liquid crystal panel which forms an image; A light guiding unit disposed on a rear surface of the liquid crystal panel; A lamp unit having a lamp unit disposed on at least one side of the light guide unit and an electrode unit formed at an end of the lamp unit; A wire connected to the electrode to supply power to the lamp unit; And a mold frame having a groove for accommodating the wire and a fixing portion provided adjacent to the electrode to fix the wire in the groove. The method of claim 1, And the fixing part is a fixing protrusion protruding in the horizontal direction in a direction in which the wire is inserted into the groove to prevent the wire from being separated from the groove. The method of claim 1, And the fixing part provides a resistance to tension in the longitudinal direction applied to the wire. The method of claim 1, And the fixing part is formed at a first entrance to which the wire connected to the electrode part is bent to be accommodated in the groove. The method of claim 4, wherein And the fixing part is formed within a range of about 5 cm from the point where the wire starts to be received in the groove. The method of claim 1, And the fixing portion is a fixing groove formed in the groove, and the wire is inserted into and fixed in the fixing groove to prevent the wire from being separated from the groove.

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