KR101352102B1 - Backlight unit - Google Patents

Abstract

The present invention provides a backlight unit capable of stably arranging a signal transmission cable on a rear surface, and a backlight unit for achieving the above object includes a cover bottom and first and second sides disposed on both sides of a rear surface of the cover bottom. 2 an inverter, a control board configured at one side of the bottom of the cover bottom, a first cable arranged to connect the control board and the first or second inverter, and the first inverter and the second inverter to be connected. A second cable disposed so as to extend in one direction so that the first and second cables are disposed, and a plurality of clips protruding inwardly on an upper portion of the first and second grooves. Characterized in that consisting of.

Cable, groove, clip

Description

Backlight unit {BACKLIGHT UNIT}

1 is a cross-sectional view schematically showing the assembly structure of a general direct type backlight unit

2 is a plan view showing the fixing structure of the cable disposed on the back of the conventional backlight unit

3 is a plan view showing a cable fixing structure of the backlight unit according to an embodiment of the present invention;

4 is a cross-sectional view taken along line II ′ of FIG. 3.

Explanation of symbols on the main parts of the drawings

30: cover bottom 31: first inverter

32: second inverter 33: control board

34, 35: 1st, 2nd groove 36, 37: 1st, 2nd cable

30a: Clip

The present invention relates to a backlight unit, and more particularly to a backlight unit capable of stably fixing the signal transmission cable disposed on the back.

Image displays are changing from CRTs to liquid crystal displays, plasma display panels, etc. In particular, LCDs have lower power consumption, lighter weights, and no harmful emissions than CRTs. As a result, it is attracting attention as the next generation advanced image display device.

A general liquid crystal display device includes a lower substrate on which a thin film transistor (TFT) is formed, an upper substrate on which color filters are arranged, and a liquid crystal layer injected between the lower substrate and the upper substrate. It is configured to include.

Here, the TFT formed on the lower substrate serves to transmit and control an electrical signal, and the liquid crystal controls the degree of light transmission by changing the molecular structure according to the applied voltage. The light controlled through the above process passes through the upper substrate and appears in a desired color and image.

On the other hand, since the liquid crystal display is a light receiving device that displays an image by adjusting the amount of light coming from the outside, a separate light source for illuminating the liquid crystal panel, that is, a backlight unit is required.

Such a backlight unit is classified into an edge type and a direct type according to the position of the light source with respect to the display surface.

Among these, the direct type backlight unit is widely used in large liquid crystal display devices because of its high light utilization rate, easy handling, and no limitation on the size of the display surface.

The external light source applied to the direct type backlight unit is appropriately selected and used according to the size and purpose of the liquid crystal display device. Linear light sources such as external electrodes), EL (Electroluminescent), and planar light sources by matrix light emitting diodes (LEDs).

Currently, Cold Cathode Fluorescent Lamps (CCFLs) are mainly used, but are gradually being replaced by External Electrode Fluorescent Lamps (EEFLs). In the case of using an external electrode fluorescent lamp, the number of inverters can be reduced since the multi-drive is possible, and thus, there is an advantage in that the cost can be reduced and the weight of the liquid crystal display can be greatly reduced due to the reduction in the number of components.

In addition, the edge type backlight unit distributes light to the entire surface by installing a light emitting lamp on the outside and using a light guide plate, and the light emitting lamp is installed on the side, and the light needs to pass through the light guide plate, thereby causing low luminance. In addition, high optical design and processing technology for the light guide plate is required for uniform distribution of light intensity.

Since the direct type and the edge type have their own disadvantages, the direct type backlight unit is mainly used in liquid crystal display devices such as monitor PCs and TVs where brightness is more important than screen thickness. The edge type backlight unit is mainly used in the liquid crystal display device in which the importance is important.

Hereinafter, a general assembly structure of a direct type backlight unit will be described.

1 is a schematic cross-sectional view showing an assembly structure of a general direct type backlight unit.

As shown in FIG. 1, a general direct type backlight unit 1 includes a cover bottom 2, a plurality of fluorescent lamps 3 arranged in one direction on the cover bottom 2, and the plurality of fluorescent lamps. A side supporter (not shown) for supporting the lamps 3 on both sides, a reflecting plate 4 formed between the fluorescent lamp 3 and the cover bottom 2, and the fluorescent lamp 3 It consists of a light scattering means (5) disposed on the top.

The light scattering means 5 prevents the shape of the fluorescent lamp 3 from appearing on the display screen of a liquid crystal panel (not shown) to be disposed above the backlight unit 1 and provides a light source having a uniform brightness distribution as a whole. In order to enhance the light scattering effect, a plurality of diffusion sheets and diffusion plates are disposed between the liquid crystal panels.

In addition, the reflector 4 is disposed so that the light generated from the fluorescent lamp 3 can be irradiated to the display unit of the liquid crystal panel, and is configured to maximize the utilization efficiency of the light.

Hereinafter, a conventional rear configuration of the backlight unit having the above configuration will be described.

2 is a plan view illustrating a fixing structure of a cable disposed on a rear surface of a conventional backlight unit.

As shown in FIG. 2, the first and second inverters 21 and 22 are provided at both sides of the rear surface of the conventional backlight unit to transfer power to the fluorescent lamps formed on the top of the cover bottom 20. ), And a control board 23 for transmitting signals to the first and second inverters 21 and 22 and other components of the backlight unit.

In this case, the control board 23 and the first inverter 21 are connected by the first cable 24, and the first inverter 21 and the second inverter 22 are connected by the second cable 25. Connected.

Although not shown in the drawing, the control board 23 also serves to transmit a signal to the source printed circuit board of the liquid crystal module configured on the backlight unit.

The first cable 24 connecting the control board 23 to the first inverter 21 is attached to the rear surface of the cover bottom 20 using a plurality of fixing tapes 26.

In addition, the second cable 25 connecting the first inverter 21 and the second inverter 22 is also attached to the rear surface of the cover bottom 20 using a plurality of fixing tapes 26.

However, the backlight unit having the above configuration has the following problems.

First, the size of the backlight unit is increased in accordance with the trend that the size of the liquid crystal module configured thereon is enlarged. In this case, the lengths of the first and second cables 24 and 25 become longer. It is impossible to fix this stably with only the fixing tape 26.

Second, since the process of attaching the first and second cables 24 and 25 using the plurality of fixing tapes 26 is to be carried out, the time consumption is large.

Third, there is a problem that the production material cost increases because a plurality of fixing tapes 26 are used to fix the first and second cables 24 and 25.

Fourth, the fixing tape 26 which fixed the 1st, 2nd cable 24, 25 may fall during a movement, and there exists a possibility that the 1st, 2nd cable 24, 25 may be damaged by this.

The present invention has been made to solve the above problems, an object of the present invention to provide a backlight unit capable of stably disposing a signal transmission cable on the back.

According to an aspect of the present invention, a backlight unit includes a cover bottom, first and second inverters disposed at both sides of a rear surface of the cover bottom, a control board configured at one side of the cover bottom, and the control. A first cable arranged to connect a board to the first or second inverter, a second cable arranged to connect the first inverter and the second inverter, and the first and second cables to be disposed The first and second grooves extending in one direction and a plurality of clips protruding inward to the upper portion of the first and second grooves.

The clips are alternately configured at both sides to protrude inwardly of the grooves on the first and second grooves.

The clip is characterized in that it is formed integrally with the cover bottom.

The clips may be configured to be symmetrically configured on both sides of the first and second grooves.

Hereinafter, a backlight unit according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a plan view illustrating a cable fixing structure of a backlight unit according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view of the structure taken along line II ′ of FIG. 3.

As shown in FIG. 1, a general backlight unit according to an exemplary embodiment of the present invention includes a cover bottom 2, a plurality of fluorescent lamps 3 arranged in one direction on the cover bottom 2, and A side supporter (not shown) for supporting the plurality of fluorescent lamps 3 from both sides, a reflector 4 formed between the fluorescent lamp 3 and the cover bottom 2, and the fluorescent lamp It consists of the light scattering means 5 arrange | positioned at the upper part of (3).

The light scattering means 5 prevents the shape of the fluorescent lamp 3 from appearing on the display screen of a liquid crystal panel (not shown) to be disposed above the backlight unit 1 and provides a light source having a uniform brightness distribution as a whole. In order to enhance the light scattering effect, a plurality of diffusion sheets and diffusion plates are disposed between the liquid crystal panels.

In addition, the reflector 4 is disposed so that the light generated from the fluorescent lamp 3 can be irradiated to the display unit of the liquid crystal panel, and is configured to maximize the utilization efficiency of the light.

The present invention may be configured by applying to the back of the backlight unit of the direct type as described above, and may be configured by applying to the back of the backlight unit of the edge type to arrange the lamp only on one side, although not shown in the figure.

Hereinafter, the case where it is applied to the backlight unit of the direct type | mold in which an inverter is arrange | positioned at the both ends of back is demonstrated.

As shown in FIGS. 3 and 4, the backlight unit according to the embodiment of the present invention has a rear surface of the backlight unit for transmitting power to fluorescent lamps formed on the upper surface of the cover bottom 30. The first and second inverters 31 and 32 are provided at both sides of the control board 33, and the control board 33 for transmitting signals to the first inverter 31, the second inverter 32, and other components of the backlight unit. Is provided.

In this case, the control board 33 and the first inverter 31 are connected by the first cable 36, and the first inverter 31 and the second inverter 32 are connected by the second cable 37. Connected.

In the above, a configuration in which the first inverter 31 is connected by the control board 33 and the first cable 36 is illustrated, but the first cable 36 connects the second inverter 32 and the control board 33 to each other. It may be arranged to connect.

Although not shown in the drawing, the control board 33 also serves to transmit a signal to the source printed circuit board of the liquid crystal module configured on the backlight unit.

The first groove 34 formed to extend in one direction on a rear surface of the cover bottom 30 corresponding to a portion where the first cable 36 connecting the control board 33 and the first inverter 31 is disposed. This is composed.

In addition, a second groove 35 is formed to extend in one direction on a rear surface of the cover bottom 30 corresponding to a portion where the second cable 37 connecting the first inverter 31 and the second inverter 32 is disposed. ) Is configured.

In addition, a plurality of clips 30a are alternately formed at both sides of the first and second grooves 34 and 35 to protrude into the grooves. The clip 30a is formed integrally with the cover bottom 30.

At this time, the drawing has shown an example in which the clip 30a is alternately arranged on both sides of the groove, but may be configured to be symmetrical on both sides of the groove.

As described above, when the first and second grooves 34 and 35 extending in one direction are provided on the rear surface of the cover bottom 30, the first and second grooves 34 and 35 are provided on the bottom surface of the first and second grooves 34 and 35. And second cables 36 and 37 are arranged.

In this case, the plurality of clips 30a alternately formed on the upper sides of the first and second grooves 34 and 35 may include first and second cables 36 disposed in the first and second grooves 34 and 35. , 37 serves to prevent the first and second grooves 34 and 35 from escaping to the outside.

As above, the first and second cables 36, 37 are disposed in the first and second grooves 34, 35 and the first and second cables 36, 37 with a plurality of clips 30a. ) Can catch the outside, it is possible to secure the first and second cables 36, 37 relatively stable.

In addition, even if the backlight unit is enlarged and the lengths of the first and second cables 36 and 37 become long, the first and second cables using the first and second grooves 34 and 35 and the clip 30a are used. (36, 37) can be fixed stably.

When the cable is disposed on the cover bottom rear surface of the backlight unit as described above, the configuration in which the groove is provided in one direction and the clip is held is arranged to connect a signal between the control board and the first and second inverters. In addition to the structure for fixing the cable, it can be applied to the structure for stably positioning the cables on the back of the various mechanisms.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

Accordingly, the technical scope of the present invention should not be limited to the contents described in the above embodiments, but should be determined by the claims.

The backlight unit according to the present invention as described above has the following effects.

First, the first and second cables 36 and 37 can be disposed in the first and second grooves 34 and 35 and catch the exiting with a plurality of clips 30a. The cables 36 and 37 can be fixed relatively stably.

In particular, even if the backlight unit is enlarged and the lengths of the first and second cables 36 and 37 become long, the first and second cables using the first and second grooves 34 and 35 and the clip 30a are used. (36, 37) can be fixed stably.

Second, when the first and second cables 36 and 37 are disposed on the bottom of the cover bottom, the first and second cables 36 may be inserted into the first and second grooves, thereby reducing the time for arranging the first and second cables.

Claims (4)

A cover bottom; First and second inverters disposed on both rear sides of the cover bottom; A control board configured on one side of the cover bottom back surface; A first cable arranged to connect the control board to the first or second inverter, A second cable arranged to connect the first inverter and the second inverter; First and second grooves respectively formed on a rear surface of the cover bottom to insert the first and second cables; A plurality of clips for preventing the first cable inserted into the first groove and the second cable inserted into the second groove from escaping to the outside; The first groove includes a bottom portion on which the first cable is seated, first and second side walls formed on both sides of the bottom portion, and an opening facing the bottom portion; The second groove includes a bottom portion on which the second cable is seated, first and second side walls formed on both sides of the bottom portion, and an opening facing the bottom portion; The plurality of clips comprises first and second clips; The first clips protrude from the first sidewall toward the second sidewall to cover a portion of the opening; The second clips protrude from the second sidewall toward the first sidewall to cover a portion of the opening; The first and second clips are alternately formed along the first and second grooves on the first sidewall and the second sidewall; The first and second clips are integrally formed with the cover bottom; The first and second sidewalls are inclined toward the bottom; An inner angle of a corner at which the rear surface of the cover bottom meets the first sidewall is obtuse; And an inner angle of a corner at which the rear surface of the cover bottom and the second sidewall meet each other. delete delete delete

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