KR20160141085A - Cover for receiving backlight unit, backlight unit and liquid crystal display device comprising the same - Google Patents

Abstract

The present invention provides a backlight unit which can prevent the damage to an LED connector when fastening the LED connector and a cable connector. According to the present invention, the backlight unit includes: a bottom part having an opening portion overlapping a cable fastener of the LED connector; and a receiving cover having a connector stopper prepared in the bottom part to be adjacent to the opening portion so as to prevent the LED connector from being eliminated from a printed circuit board.

Description

Technical Field [0001] The present invention relates to a cover for storing a backlight unit, a backlight unit including the cover, and a liquid crystal display device. BACKGROUND OF THE INVENTION [0001]

The present invention relates to a backlight unit and a liquid crystal display including the same.

A typical liquid crystal display device displays an image using a thin film transistor (Thin Film Transistor) as a switching element. Such a liquid crystal display device is widely used as a display device for a notebook computer, a tablet computer, a smart phone, a portable display device, and a portable information device in addition to a display device for a television or a monitor. Since such a liquid crystal display device is not a self-emitting type, an image is displayed using light emitted from a backlight unit disposed under the liquid crystal display panel.

BACKGROUND ART In recent years, a backlight unit using a light emitting diode (LED) having a long lifetime and a small power consumption and being capable of miniaturization has been developed. Such a backlight unit has been applied to a small liquid crystal display device to a large liquid crystal display device.

The backlight unit is divided into a direct type and an edge type according to the arrangement position of the light source. In recent years, an edge type backlight unit has been widely applied for slimming down a liquid crystal display device.

1 is a cross-sectional view schematically showing a general edge type backlight unit.

1, a general edge type backlight unit includes a light guide plate 20 housed in a storage cover 10 having an opening 11, a reflection sheet 30 (see FIG. 1) disposed between the storage cover 10 and the light guide plate 20, Optical sheets 40 disposed on the light guide plate 20, a printed circuit board 50 on which a plurality of light emitting diodes (not shown) for irradiating light to the light entrance portions of the light guide plate 20 are mounted, And an LED connector 60 mounted on the substrate 50 and exposed downward of the storage cover 10 through the opening 11.

The housing cover 10 includes a bottom portion 13 having an opening 11 and a side wall portion 15 bent from the bottom portion 13. [ Here, the opening 11 is formed to have a size larger than the size of the LED connector 50. One side surface 11a of the opening 11 is formed on one side 62 of the LED connector 60 facing the light entrance portion of the light guide plate 20 for convenience of fastening between the LED connector 60 and the cable connector 72 The distance D is set.

The LED connector 60 receives the LED driving power supplied from the backlight driver (not shown) through the cable 70 and the cable connector 72 and outputs the received LED driving power via the printed circuit board 50 to the plurality So that a plurality of light emitting diodes are caused to emit light.

In such a backlight unit, the LED connector 60 is fastened to the cable connector 72. At this time, as shown in Fig. 2, when the cable connector 72 is moved from the lower face of the housing cover 10 to the obtuse angle? An external force is applied to the LED connector 60 so that the soldering portion of the LED connector 60 is broken and the LED connector 60 is electrically connected to the printed circuit board (not shown) 50). When the LED connector 60 is separated from the cable connector 72 and the cable connector 72 is separated from the lower face of the storage cover 10 at an obtuse angle? The soldering portion of the LED connector 60 is damaged due to the leverage effect with respect to the one end of the LED connector 60 and the LED connector 60 is detached from the printed circuit board 50.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a backlight unit housing cover capable of preventing breakage of an LED connector when an LED connector and a cable connector are fastened, a backlight unit including the same, and a liquid crystal display device. We will do it.

According to an aspect of the present invention, there is provided a backlight unit including a bottom having an opening overlapping with a cable fastener of an LED connector, and a connector stopper provided at a bottom portion adjacent to the opening to prevent the LED connector from dropping from the printed circuit board. And a storage cover including the storage cover.

According to an aspect of the present invention, there is provided a backlight unit housing cover including a bottom portion having an opening overlapping with a cable fastener of an LED connector mounted on a printed circuit board, and a connector stopper provided at a bottom portion adjacent to the opening portion. can do.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal display panel, a liquid crystal display panel mounted on the printed circuit board, And a connector stopper for preventing the LED connector from dropping out of the LED connector.

According to the present invention, the LED connector can be prevented from dropping from the printed circuit board when the LED connector and the cable connector are mounted on the printed circuit board.

In addition, the present invention can reduce the width of the bezel of the liquid crystal display device by exposing the edges of the liquid crystal display panel excluding the edge portions of the liquid crystal display panel to the outside without being covered by the structure, It is possible to improve the aesthetics of the liquid crystal display device.

In addition, the liquid crystal display panel of the present invention has a concave curved surface shape, thereby maximizing the viewer's immersion feeling while improving the deviation of the viewing distance.

In addition to the effects of the present invention mentioned above, other features and advantages of the present invention will be described below, or may be apparent to those skilled in the art from the description and the description.

1 is a cross-sectional view schematically showing a general edge type backlight unit.
2 is a cross-sectional view for explaining a dropout of an LED connector generated in a general edge type backlight unit.
3 is a cross-sectional view illustrating a backlight unit according to a first example of the present invention.
Fig. 4 is a view for explaining the opening of the storage cover and the connector stopper shown in Fig. 3;
5 is a cross-sectional view for explaining prevention of dropout of the LED connector by the connector stopper according to the first example of the present invention.
6 is a view for explaining a backlight unit according to a second example of the present invention.
7A and 7B are views for explaining a process of forming the connector stopper shown in FIG.
8 is a view for explaining a modification of the connector stopper in the backlight unit according to the second example of the present invention.
9 is a view for explaining the connector stopper shown in Fig.
10 is a cross-sectional view illustrating a backlight unit according to a third example of the present invention.
Fig. 11 is a view for explaining the opening of the storage cover and the connector stopper shown in Fig. 10;
12 is a cross-sectional view for explaining the prevention of dropout of the LED connector by the connector stopper according to the third example of the present invention.
13 is a cross-sectional view illustrating a backlight unit according to a fourth example of the present invention.
14 is a view for explaining the auxiliary connector stopper shown in Fig.
15 is a perspective view showing a liquid crystal display device according to an example of the present invention.
16 is a cross-sectional view taken along the line I-I 'shown in Fig.
17 is a cross-sectional view taken along the line II-II 'shown in FIG.

The meaning of the terms described herein should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms. It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one. The term "on" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a cover for storing a backlight unit, a backlight unit including the same, and a liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 3 is a cross-sectional view for explaining a backlight unit according to a first example of the present invention, and FIG. 4 is a view for explaining an opening portion and a connector stopper of the storage cover shown in FIG.

3 and 4, the backlight unit according to the first embodiment of the present invention includes a storage cover 110, a light guide plate 130, a printed circuit board 150, and an LED connector 170.

The light guide plate 130 includes a light-incident portion 132 provided on at least one side surface. The light guide plate 130 is disposed on the bottom portion of the storage cover 110.

A reflective sheet 140 may be disposed between the light guide plate 130 and the bottom of the storage cover 110. The reflective sheet 140 reflects light incident through the lower surface of the light guide plate 130 toward the inside of the light guide plate 130, thereby minimizing the loss of light.

The optical sheets 142 are disposed on the light guide plate 130. The optical sheets 142 serve to improve the luminance characteristics of light emitted from the light guide plate 130. [ For example, the optical sheets 142 may comprise a lower diffusion sheet, a prism sheet, and an upper diffusion sheet, but not limited thereto, a diffusion sheet, a prism sheet, a dual brightness en- hancement film, lenticular sheet, and lenticular sheet.

The printed circuit board 150 is disposed on the side of the storage cover 110 so as to face the light-incident portion 132 of the light guide plate 130. A plurality of light emitting diodes (not shown) are mounted on the printed circuit board 150. In addition, the printed circuit board 150 may be composed of a plurality of the light guide plates 130 according to the length of the light entrance portion.

The plurality of light emitting diodes are arranged to have a predetermined interval for preventing hot spot along the longitudinal direction X of the printed circuit board 150. Each of the plurality of light emitting diodes emits light according to an LED driving power source supplied from an LED driving power supply line provided on the printed circuit board 150 and irradiates light to the light receiving unit 132 of the light guide plate 130. Here, each of the plurality of light emitting diodes according to an example may be defined as including a light emitting diode chip directly mounted on the printed circuit board 150 and a lens covering the light emitting diode chip. Each of the plurality of light emitting diodes according to another example includes a mold frame mounted on the printed circuit board 150, a light emitting diode chip disposed in the mold frame, and a resin layer covering the light emitting diode chip. At this time, the resin layer may have a lens shape including a phosphor material.

The LED connector 170 is mounted on the printed circuit board 150 with a connector fastener 171. The LED connector 170 may be mounted on the printed circuit board 150 by soldering and may be mounted on one edge and / or the other edge of the printed circuit board 150. The connector fastener 171 is arranged to face the bottom surface of the storage cover 171. The LED connector 170 receives the LED driving power supplied from the backlight driver (not shown) through the cable 190 and the cable connector 192 and outputs the received LED driving power to a plurality The light emitting diodes of the plurality of light emitting diodes are caused to emit light.

The storage cover 110 houses the light guide plate 130 and the printed circuit board 150 and exposes the connector fastening hole 171 of the LED connector 170 downward. To this end, the storage cover 110 according to an example includes a bottom portion 113 having an opening 111, a side wall portion 115 for supporting the printed circuit board 150, and an LED connector 170 And a connector stopper 117 for holding the connector.

The bottom part 113 supports the light guide plate 130 and includes an opening 111 overlapping with a cable fastening hole 171 of the LED connector 170.

The opening 111 is formed to penetrate a part of the bottom portion 113 which overlaps with the LED connector 170. The opening 111 has a size larger than that of the LED connector 170 so that the LED connector 170 can be exposed below the storage cover 110. The first side face 111a of the opening 111 faces the light entrance portion of the light guide plate 132 for convenience of fastening between the LED connector 170 and the cable connector 192 according to a side locking method. (D) from one side (172) of the LED connector (170). That is, between the first side 111a of the opening 111 and one side 172 of the LED connector 170, a gap space of 0.3 to 0.5 mm may be provided.

The side wall part 115 defines a storage space provided at an upper portion of the bottom part 113 by bending from an edge part of the bottom part 113. [ A printed circuit board 150 is attached to the inner surface of the sidewall of the storage cover 110 facing the light-incident portion 132 of the light guide plate 130 by an adhesive member 152.

The connector stopper 117 according to the first example prevents the LED connector 170 from being rotated beyond the critical angle when fastening between the LED connector 170 and the cable connector 190 through the cable fastening hole 171, Thereby preventing the LED connector 170 from coming off from the circuit board 150. That is, when the LED connector 170 is coupled or disconnected between the LED connector 170 and the cable connector 190, when the LED connector 170 is rotated beyond the critical angle, The soldering portion is broken and the printed circuit board 150 is detached. The connector stopper 117 prevents the LED connector 170 from being rotated beyond the critical angle by physical contact with the LED connector 170 to prevent the lever effect from falling off. Thereby preventing the LED connector 170 from falling off the printed circuit board 150. Here, the LED connector 170 is separated from the printed circuit board 150 by the rotation of the LED connector 170 and the cable connector 190 by the rotation exceeding the critical angle, together with accumulation of the stress applied to the soldering portion at the time of fastening or separating the LED connector 170 and the cable connector 190 Experiments have shown that the LED connector 170 can be removed from the printed circuit board 150 when rotated to greater than 7 degrees. Accordingly, it is preferable that the critical angle of rotation of the LED connector 170 when the LED connector 170 is fastened to or disconnected from the cable connector 190 is set to 7 degrees in the connector stopper 117 according to the first embodiment. And may be changed depending on the size of the gap space which is the distance between the first side face 111a of the opening 111 and one side face 172 of the LED connector 170. [

The connector stopper 117 according to the first example may be provided on the bottom portion 113 adjacent to the opening 111 of the storage cover 110. [ The connector stopper 117 has a bottom portion contacting the first side face 111a of the opening 111 spaced apart from the one side face 172 of the LED connector 170 facing the light incident portion 132 of the light guide plate 130 113 so as to limit the rotation angle of the LED connector 170 to less than the critical angle by physical contact with the LED connector 170 to prevent the LED connector 170 from being dropped out. That is, the connector stopper 117 protrudes to the upper portion of the bottom portion 113 so as to have a trapezoidal cross-sectional shape with one side opened. The one side of the connector stopper 117 protrudes from the side surface 172 of the LED connector 170, Lt; / RTI > The connector stopper 117 may protrude from the top of the bottom portion 113 by a pressing process using the engraved projections or a punching process using the engraved projections so as to have a concave groove.

5, the cable connector 192 is inclined at an obtuse angle? (Or an oblique line) from the lower surface of the storage cover 110, The LED connector 170 is prevented from being rotated beyond the critical angle through the connector stopper 117 when the LED connector 170 is fastened or detached from the printed circuit board 150. That is, according to the present invention, by using the connector stopper 117, the rotation angle of the LED connector 170 generated according to the inclination of the cable connector 192 when fastening or detaching between the LED connector 170 and the cable connector 192 The LED connector 170 can be prevented from dropping off from the printed circuit board 150 by limiting the effect of the leverage due to the rotation of the LED connector 170 by limiting the critical angle to less than the critical angle.

6 is a view for explaining a backlight unit according to a second example of the present invention, which is a modification of the structure of the connector stopper in the backlight unit according to the first example of the present invention. Accordingly, only the connector stopper will be described in the following description, and redundant description of the remaining components will be omitted.

The connector stopper 1117 according to the second embodiment of the present invention has a bottom portion 113 which is in contact with the first side face 111a of the opening 111 spaced apart from the one side face 172 of the LED connector 170, (Z). At this time, the connector stopper 1117 is formed to be inclined from the bottom portion 113 to the upper side, that is, toward one side 172 of the LED connector 170. That is, the connector stopper 1117 may be formed to have a " / " shaped cross section from the bottom portion 113.

The connector stopper 1117 according to the second example limits the rotation angle of the LED connector 170 generated when the LED connector 170 and the cable connector 192 are fastened or disconnected to less than the threshold angle, It is possible to prevent the dropout of the LED connector 170 from the printed circuit board 150 by minimizing the leverage effect caused by the rotation of the LED 170.

7A and 7B are views for explaining a process of forming the connector stopper shown in FIG.

First, as shown in FIG. 7A, the connector stopper 1117 according to the second example is provided in a planar shape on the bottom portion 113 which is in contact with the first side face 111a of the opening 111. FIG. The housing cover 110 is cut so as to be parallel to the bottom portion 113 contacting the first side face 111a of the opening 111 to separate each side face of the connector stopper 1117 from the bottom portion 113 And has a pair of slits 118a and 118b.

Then, as shown in FIG. 7B, the connector stopper 1117 provided in the planar shape is bent obliquely in an oblique direction from the bottom portion 113 toward the upper direction Z through a bending process. Accordingly, the connector stopper 1117 is bent so as to have a " / " -shaped cross section from the bottom portion 113.

In addition, the connector stopper 1117 may be shortened in length by bending a certain portion of the bottom portion 113 that contacts the first side surface 111a of the opening 111. The side surface of the connector stopper 1117 provided in a planar shape on the bottom portion 113 contacting the first side surface 111a of the opening portion 111 is designed to extend into the inside of the opening portion 111 by a predetermined length L . The extension length L of the connector stopper 1117 is set such that the opposing face 1117a of the connector stopper 1117 facing the one side face 172 of the LED connector 170 is flush with the LED It is desirable to set it as close as possible to one side 1172 of the connector 170. In this case, since the connector stopper 1117 is disposed in the side space of the LED connector 170, the above-described leverage effect can be further minimized without adversely affecting the assembling convenience between the LED connector 170 and the cable connector 192 .

On the other hand, the connector stopper 1117 according to the second example has an upward direction Z in the bottom portion 113, that is, a side surface 172 of the LED connector 170, as shown in Figs. 8 and 9, Shaped inclined surface inclined to the inclined surface. For example, the connector stopper 1117 may be bent so as to have an inclined portion and a horizontal portion from the bottom portion 113. 7A, the connector stopper 1117 is provided in a flat shape on a bottom portion 113 which is in contact with the first side face 111a of the opening 111, And may be bent toward the upper direction Z from the bottom portion 113 so as to have a horizontal portion.

FIG. 10 is a cross-sectional view for explaining a backlight unit according to a third example of the present invention, FIG. 11 is a view for explaining an opening of a storage cover and a connector stopper shown in FIG. 10, The structure of the connector stopper in the backlight unit is changed. Accordingly, only the connector stopper will be described in the following description, and redundant description of the remaining components will be omitted.

The connector stopper 2117 according to the third embodiment of the present invention is configured such that when the LED connector 170 is fastened or detached between the cable connector 192 and the cable connector 192, Thereby preventing the connector 170 from dropping off from the printed circuit board 150. That is, when the cable connector 192 is inclined beyond the critical angle, the LED connector 170 can be detached from the printed circuit board 150, and the detachment of the LED connector 170 can be prevented from occurring on the connector stopper 2117 .

The connector stopper 2117 has a bottom portion in contact with the first side surface 111a of the opening 111 spaced apart from one side surface 172 of the LED connector 170 facing the light incoming portion 132 of the light guide plate 130 113 so as to limit the inclination of the cable connector 192 to less than the critical angle through physical contact with the cable connector 192 to prevent the LED connector 170 from falling off. For example, the connector stopper 2117 protrudes from the bottom of the bottom portion 113 to the bottom of the bottom portion 113 to have a concave trapezoidal columnar shape or a quadrangular pyramidal shape in cross section and is fastened to the LED connector 170 It may be an embossing projection facing the side surface of the cable connector 192. [ The connector stopper 2117 may protrude from the bottom of the bottom portion 113 by a pressing process using the embossing protrusion or a punching process using the engraving protrusion so as to have a concave groove.

12, the cable connector 192 is inclined at an obtuse angle &thetas; from the lower surface of the storage cover 110 so that the LED connector 170 The LED connector 170 is prevented from dropping out of the printed circuit board 150 by preventing the cable connector 192 from tilting beyond the critical angle through the connector stopper 2117 when fastened or detached. That is, in the present invention, by using the connector stopper 2117, the rotation angle of the LED connector 170 generated according to the inclination of the cable connector 192 when fastening or detaching between the LED connector 170 and the cable connector 192 It is possible to prevent the connector 170 from dropping off from the printed circuit board 150 by minimizing the leverage effect caused by the rotation of the LED connector 170 by limiting the distance to less than the critical angle.

FIG. 13 is a sectional view for explaining a backlight unit according to a fourth example of the present invention, and FIG. 14 is a view for explaining an auxiliary connector stopper shown in FIG. 13, which is a backlight unit according to the first example of the present invention And a press-down connector stopper is additionally formed on the storage cover. Accordingly, in the following description, only the auxiliary connector stopper and the related configuration will be described, and redundant description of the remaining configurations will be omitted.

The storage cover 110 is provided with an auxiliary connector 170 for preventing the cable connector 192 from tilting beyond the threshold angle from the lower surface of the storage cover 110 when the LED connector 170 and the cable connector 192 are fastened or separated, And may further include a stopper 119.

The auxiliary connector stopper 119 is vertically protruded from the bottom portion 113 in contact with the second side 111b of the opening portion 111 in parallel with the first side face 111a of the opening portion 111 in the downward direction Z . The auxiliary connector stopper 119 prevents the cable connector 192 from tilting beyond the critical angle from the lower surface of the storage cover 110 when the LED connector 170 is fastened or separated from the cable connector 192, Thereby preventing the LED connector 170 from coming off from the circuit board 150.

When the cable connector 192 is inclined at an obtuse angle &thetas; from the lower surface of the storage cover 110 and is fastened to or separated from the LED connector 170, the backlight unit according to the fourth example of the present invention, 117 to prevent the LED connector 170 from rotating beyond a critical angle with respect to one end and to tilt the cable connector 192 beyond the critical angle through the auxiliary connector stopper 119 The LED connector 170 is prevented from being detached from the printed circuit board 150 by preventing the LED connector 170 from rotating beyond the critical angle with respect to the other end. That is, according to the present invention, the rotation of the LED connector 170 in the first direction or the rotation in the second direction opposite to the first direction, which occurs in accordance with the inclination of the cable connector 192, The LED connector 170 can be prevented from dropping off from the printed circuit board 150 by limiting the distance from the printed circuit board 150 to less than the critical angle through the connector stopper 119. [

Meanwhile, the auxiliary connector stopper 119 may also be provided in the storage cover 110 of the backlight unit according to the second or third example of the present invention shown in FIGS. 6 to 14, .

FIG. 15 is a perspective view showing a liquid crystal display device according to an example of the present invention, FIG. 16 is a cross-sectional view taken along a line I-I 'shown in FIG. 15, to be.

15 to 17, a liquid crystal display device according to an exemplary embodiment of the present invention includes a liquid crystal display panel 210, a panel driving circuit unit 220, a backlight unit 230, a backlight driving unit 235, a guide frame 240 A panel attachment member 250, a front portion cover 260, and an outer case 270. [

The liquid crystal display panel 210 displays an image by adjusting the light transmittance of the liquid crystal layer. The liquid crystal display panel 210 includes a lower substrate 211, an upper substrate 213, and a lower polarizing member 214, which are adhered to each other with a liquid crystal layer (not shown) A polarizing plate 215, and an upper polarizing member 217.

The lower substrate 211 is a thin film transistor array substrate. The lower substrate 211 is a pixel array formed of a plurality of pixels (not shown) formed in each pixel region intersecting with a plurality of gate lines (not shown) and a plurality of data lines . Each pixel may include a thin film transistor (not shown) connected to a gate line and a data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

A gate driving circuit (not shown) for supplying a gate signal to the gate line is formed on the left and / or right edge portions of the lower substrate 211. A gate driving circuit is formed together with the thin film transistor manufacturing process of each pixel so as to be connected to each gate line. A pad portion PP connected to each signal line is provided on the lower edge portion of the lower substrate 211 and the pad portion PP is connected to the panel driving circuit portion 220.

The upper substrate 213 includes a pixel defining pattern that defines an opening region overlapping each pixel region formed on the lower substrate 211, and a color filter formed in the opening region. The upper substrate 213 is adhered to the lower substrate 211 with a liquid crystal layer interposed therebetween by a sealant so that the entire lower substrate 211 excluding the pad portion PP of the lower substrate 211 Cover.

At least one of the lower substrate 211 and the upper substrate 213 is provided with an alignment layer (not shown) for setting the pretilt angle of the liquid crystal. The liquid crystal layer is interposed between the lower substrate 211 and the upper substrate 213. The liquid crystal molecules are aligned in the horizontal direction according to the data voltage applied to the pixel electrode and the horizontal electric field formed by the common voltage Liquid crystal.

The lower polarizing member 215 is attached to the lower surface of the lower substrate 211 to polarize light incident from the backlight unit 230 to a first polarization axis and irradiate the lower substrate 211.

The upper polarizing member 217 is attached to the upper surface of the upper substrate 213 to polarize light emitted to the outside through the upper substrate 213. The upper polarizing member 217 according to an exemplary embodiment is a polarizing film attached to the upper surface of the upper substrate 213 to transmit color light emitted to the outside through the upper substrate 213 to a second polarizing axis different from the first polarizing axis Lt; / RTI > The upper polarizing member 217 according to another example separates the polarizing film and the three-dimensional image attached to the upper surface of the polarizing film and displayed on the liquid crystal display panel 210, i.e., the left-eye image and the right- A liquid crystal display panel 210 may be driven in a 2D display mode and a 3D display mode.

The liquid crystal display panel 210 displays a predetermined color image according to the light transmittance of the liquid crystal layer by driving the liquid crystal layer according to an electric field formed for each pixel by a data voltage and a common voltage applied to each pixel .

In addition, the liquid crystal display device according to an exemplary embodiment of the present invention further includes a side sealing member 219.

The side sealing members 219 are provided to cover the respective side surfaces of the liquid crystal display panel 210 excluding the side surface of the lower edge portion of the liquid crystal display panel 210. For example, the side sealing member 219 may be disposed on the left side of the liquid crystal display panel 210 except the lower side of the liquid crystal display panel 210 provided with the pad portion PP, on the basis of a state in which the display surface of the liquid crystal display panel 210 is vertically erected. , The upper left side corner portion, the upper side, the upper right side corner portion, and the right side of the liquid crystal display panel 210 directly. The side sealing member 219 protects the side surface of the liquid crystal display panel 210 from an external impact and prevents side light leakage of the liquid crystal display panel 210.

The side sealing member 219 may be made of a silicone-based or ultraviolet (UV) curing type sealing agent (or resin). However, considering the tack time, . The side sealing member 219 may be colored (for example, blue, red, cyan, or black), but the present invention is not limited thereto. For example, the side sealing member 219 may be made of a colored resin or a light- desirable.

The panel driving circuit unit 220 is connected to a pad unit PP provided on the lower substrate 211 and displays a predetermined color image on the liquid crystal display panel 210 by driving each pixel of the liquid crystal display panel 210. The panel driving circuit unit 220 according to an exemplary embodiment includes a plurality of flexible circuit films 221, a data driving integrated circuit 223, a display printed circuit board 225, and a timing control unit (not shown).

Each of the plurality of flexible circuit films 221 is attached to the pad portion PP of the lower substrate 211 and the display printed circuit board 225 by a film adhering process and is made of a tape carrier package (TCP) or a COF A chip on flexible board or a chip on film). Each of the plurality of flexible circuit films 221 is bent on the rear surface of the guide frame 240 so as to surround the side surface of the lower edge portion of the liquid crystal display panel 210.

The data driving integrated circuit 223 is mounted on each of the plurality of flexible circuit films 221 and connected to the pad portion PP through the flexible circuit film 221. The data driving integrated circuit 223 receives the pixel data and the data control signal supplied from the timing control unit and converts the pixel data for each pixel into analog data signals in accordance with the data control signal to output the pad unit PP To the corresponding data line.

The display printed circuit board 225 is connected to a plurality of flexible circuit films 221. The display printed circuit board 225 serves to provide a signal necessary for displaying an image to each pixel of the liquid crystal display panel 210 to the data driving IC 223 and the gate driving circuit. To this end, various signal wirings, various power supply circuits (not shown), memory devices (not shown), and the like are mounted on the display printed circuit board 225.

The timing control unit is mounted on the display printed circuit board 225 and outputs digital image data input from the drive system in response to a timing synchronization signal supplied from an external drive system (not shown) to the pixel arrangement of the liquid crystal display panel 210 And generates pixel data for each pixel, and provides the generated pixel data for each pixel to the data driving IC 223. The timing control unit generates the data control signal and the gate control signal, respectively, based on the timing synchronization signal, and controls the driving timing of each of the data driving integrated circuit 223 and the gate driving circuit.

In addition, the timing controller may separately control the brightness of each region of the liquid crystal display panel 210 by controlling the backlight unit 230 through the edge-type local dimming technique.

The liquid crystal display panel 210 connected to the panel driving circuit unit 220 has a predetermined radius or preset curvature around a virtual reference point in order to maximize the viewing immersion feeling while improving the viewing distance variation. And can be curved in a concave shape. That is, the liquid crystal display panel 210 is coupled to the guide frame 240 in a concave shape by the panel bending process. Herein, the panel bending process is performed such that the liquid crystal display panel 210 is heated to a predetermined temperature while bending the liquid crystal display panel 210 concave in a predetermined curved surface shape, and then the bending state is maintained for a predetermined time period so that the display surface of the liquid crystal display panel 210 is maintained in a curved shape do. Accordingly, the liquid crystal display panel 210 on which the panel bending process has been performed has a curved shape, not a planar shape. For example, the liquid crystal display panel 210 has a curved surface shape in which the length of the horizontal direction X is longer than the length of the vertical direction Y and the central portion of the horizontal direction X is curved concavely toward the backlight unit 230 Lt; / RTI >

The backlight unit 230 illuminates the lower surface of the liquid crystal display panel 210 with light. The backlight unit 230 according to an exemplary embodiment includes a housing cover 110, a light guide plate 130, a reflective sheet 140, optical sheets 142, a printed circuit board 150, a plurality of light emitting diodes 155, LED connector 170. Since the backlight unit 230 has the same configuration as that of the backlight unit shown in FIGS. 3 to 14, a duplicate description thereof will be omitted.

Meanwhile, the storage cover 110 may have a curved shape corresponding to the concave curved liquid crystal display panel 210. That is, the storage cover 110 has a curved surface shape in which the length of the lateral direction X is longer than the length of the longitudinal direction Y and the central portion of the lateral direction X is curved concave toward the outer case 270.

The light guide plate 130 may be formed in a planar shape and then housed in the housing cover 110 to have a curved shape. That is, the planar light guide plate 130 may have a curved shape corresponding to the liquid crystal display panel 210 by being bent concavely due to its own weight when housed in the storage cover 110. The light guide plate 130 may be formed in a curved shape corresponding to the concave curved liquid crystal display panel 210 and may be housed in the housing cover 110 according to another example.

The backlight driver 235 is connected to the LED connector 170 of the backlight unit 230 through a cable 190 and a cable connector 192. The backlight driving unit 235 generates an LED driving power source to emit a plurality of light emitting diodes 155. At this time, the backlight driving unit 235 may separately control the brightness of each region of the liquid crystal display panel 210 by emitting a plurality of light emitting diodes 155 through the edge type local dimming technique based on the control of the timing control unit.

The rotation of the LED connector 170 caused when the cable connector 192 is connected to or disconnected from the LED connector 170 is controlled by the connector stopper 117 (and the auxiliary connector stopper 119) The LED connector 170 is not detached from the printed circuit board 150. As shown in FIG.

The guide frame 240 has a rectangular frame shape and is supported by the side walls 115 of the storage cover 110 to support the rear edge portion of the liquid crystal display panel 210. At this time, one side of the guide frame 240 supports the front part cover 260 while covering the lower side edge of the liquid crystal display panel 210, and the remaining part of the guide frame 240, except for one side, (Not shown). The guide frame 240 is disposed under the liquid crystal display panel 210 except for one side thereof, so that the side of the liquid crystal display panel 210 is not wrapped, thereby reducing the width of the bezel of the liquid crystal display device. To this end, the guide frame 240 according to an example includes a panel attachment portion 241, a guide sidewall 242, and a projecting sidewall 243.

The panel attachment portion 241 is formed in a rectangular band shape having a central opening and is disposed under the liquid crystal display panel 210 to support the rear edge portion of the liquid crystal display panel 210.

The guide side wall 242 is provided at a constant height on the rear edge portion of the panel attachment portion 241. The guide sidewall 242 is disposed below the liquid crystal display panel 210 to cover each side of the storage cover 110. At this time, the guide side wall 242 can be engaged with the side wall 115 of the storage cover 110 by a coupling means such as a screw or a hook.

The protruding sidewall 243 is provided at a predetermined height on a top surface edge portion of the panel attaching portion 241 overlapping with a lower edge portion of the liquid crystal display panel 210. That is, the protruded side wall 243 is provided on one side of the panel attachment part 241 to cover the side of the lower edge part of the liquid crystal display panel 210 and to support the front part cover 260. At this time, the plurality of flexible circuit films 221 are bent toward the rear side of the storage cover 110 so as to enclose the upper and side surfaces of the protruding side walls 243.

The guide frame 240 may have a curved shape corresponding to the concave curved liquid crystal display panel 210. That is, the guide frame 240 according to an exemplary embodiment has a curved surface shape in which the length of the horizontal direction X is longer than the length of the longitudinal direction Y, and the central portion of the horizontal direction X is curved concavely toward the outer case 270 .

The panel attachment member 250 physically couples the rear edge portion of the liquid crystal display panel 210 and the guide frame 240 to each other. That is, the lower surface of the panel attachment member 250 is physically coupled to the panel attachment portion 241 of the guide frame 240, and the upper surface of the panel attachment member 250 is physically coupled to the rear edge portion of the liquid crystal display panel 210 Lt; / RTI > The panel attachment portion 241 of the guide frame 240 to which the panel attachment member 250 is attached is provided with a guide groove which is recessed to have a certain depth from the upper surface of the panel attachment portion 241 Thereby defining the attachment position of the panel attachment member 250.

The panel attachment member 250 maintains the curved shape of the concave curved liquid crystal display panel 210 by attaching the liquid crystal display panel 210 to the guide frame 240 and the liquid crystal display panel 210 is attached to the guide frame 240 And falls down. The panel mounting member 250 is preferably coupled to the lower substrate 211 of the liquid crystal display panel 210 in consideration of the coupling force and the thickness of the guide frame 240 and the liquid crystal display panel 210, And may be coupled to the lower polarizing member 215 of the liquid crystal display panel 210 without limitation. For example, the panel attachment member 250 may be a double-sided tape, a thermosetting adhesive, a photocurable adhesive, a foam tape, or the like, but may be a double-sided tape or a foam tape having a certain elastic force desirable.

The panel attachment member 250 is applied to reduce the bezel width and the number of components of the liquid crystal display device by removing the top case in the liquid crystal display device and to improve the aesthetics. That is, since the liquid crystal display panel 210 is fixed to the guide frame 240 using the panel attachment member 250, the present invention can prevent the liquid crystal display panel 210, which is supported by the guide frame 240, The conventional top case can be removed. Accordingly, the present invention does not require a top case, which is an essential constitution of a general liquid crystal display device. The entire front surface except the lower edge portion of the liquid crystal display panel 210 has a planar shape and is exposed to the outside, The bezel width and the number of parts of the bezel can be reduced. As the top case is removed, the side surface of the liquid crystal display panel 210 may be exposed to the outside and may be damaged from an external impact or side light leakage may be generated by total internal reflection of the liquid crystal display panel 210. However, It is possible to protect the side surface of the liquid crystal display panel 210 from an external impact through the side sealing member 219 provided on the side surface of the display panel 210 and to prevent side light leakage.

The front portion cover 260 is formed to have a curved shape corresponding to the liquid crystal display panel 210 and covers the lower edge portion of the liquid crystal display panel 210 including the pad portion PP of the lower substrate 211 . The front portion cover 260 covers the lower edge portion of the liquid crystal display panel 210 so that the panel driving circuit portion 220 connected to the pad portion PP of the lower substrate 211 and the pad portion PP is exposed .

The front portion cover 260 according to the present invention includes a front cover portion 261 and a side cover portion 263.

The front cover part 261 covers the pad part PP of the liquid crystal display panel 210 and is concavely curved so as to have a curved surface shape corresponding to the curved shape of the liquid crystal display panel 210. The front cover portion 261 has a length and a width to cover the lower edge portion of the liquid crystal display panel 210. The front cover part 261 is spaced apart from the front surface of the lower edge part of the liquid crystal display panel 210 by a predetermined distance to cover the lower edge of the liquid crystal display panel 210, Covers the front surface of the part. That is, the front cover part 261 has a predetermined radius around the virtual reference point so as to be spaced apart from the front surface of the liquid crystal display panel 210 by a predetermined distance, or has a curved surface shape having a preset curvature.

The side cover portion 263 is bent from the lower side of the front cover portion 261 so as to enclose one side portion of the guide frame 240, that is, the side wall 243. The side cover portion 263 is detachably coupled to the projecting side wall 243 by a fastening member such as a screw and / or a hook. For example, each of the side edges of the side cover portion 263, i.e., the left and right edges thereof, may be coupled to the protruded side wall 243 by a screw (not shown) (Not shown) are formed at both edge portions of the screw holes (not shown). The remaining portions of the side cover portion 263 except for both edge portions may be coupled to the protruding side wall 243 through a plurality of hooks (not shown) provided at regular intervals.

The outer case 270 houses the storage cover 110 and covers the side surface of the front portion cover 260 and the side surface of the guide frame 240 to form the appearance of the side surface and the rear surface of the liquid crystal display device. The outer case 270 according to an exemplary embodiment includes a case plate 271 and a case side wall 273 for providing a storage space.

The case plate 271 covers the rear surface of the storage cover 110. In particular, the case plate 271 may have a curved surface shape corresponding to the concave curved liquid crystal display panel 210 to improve the aesthetics of the rear surface of the liquid crystal display device. That is, the case plate 271 has a curved surface shape in which the length of the lateral direction X is longer than the length of the longitudinal direction Y and the central portion of the lateral direction X is curved concavely toward the rear side.

The case side wall 273 is vertically bent from the edge of the case plate 271 to cover the guide side wall 242 of the guide frame 240 and the side cover portion 263 of the front portion cover 260. That is, one side wall of the case side wall 273 surrounds the side cover portion 263 of the front portion cover 260, and the remaining side walls of the case side wall 273 are covered with the guide frame 240 and the side sealing members 219 provided on the side surfaces of the liquid crystal display panel 210 are wrapped. Each side surface of the liquid crystal display panel 210 is surrounded by the case side wall 273 and the upper surface of the lower edge portion of the liquid crystal display panel 210 is covered by the front side cover 260, The entirety of the front surface excluding the lower edge portion of the guide frame 240 and / or the outer case, for example, is exposed to the outside without being hidden.

The liquid crystal display device according to an exemplary embodiment of the present invention may further include a buffer pad 265 provided on the front portion cover 260 so as to overlap the lower edge portion of the liquid crystal display panel 210.

The cushioning pad 265 is attached to the inner surface of the front portion cover 260, that is, the inner surface of the front cover portion 261, and faces the lower edge portion of the liquid crystal display panel 210 with a predetermined gap space therebetween . At this time, the buffer pads 265 may have a straight shape having a predetermined width and thickness. Accordingly, the buffer pad 265 protects the liquid crystal display panel 210 from an external force by buffering an external force applied to the front portion cover 260 and prevents foreign substances such as dust from touching the liquid crystal display panel 210, (260).

In the liquid crystal display device according to an exemplary embodiment of the present invention, the remaining edge portions of the liquid crystal display panel 210 except for a part of the edge thereof are not covered by a mechanism such as the guide frame 240 and the outer case 270, And has a thin bezel width corresponding to the thickness of the outer case 270, and the step at the edge portion is removed to have an improved aesthetics. The liquid crystal display device according to an exemplary embodiment of the present invention is configured such that when the cable connector 192 and the LED connector 170 are fastened or separated from each other, the connector stopper 117 The LED connector 170 can be prevented from dropping off from the printed circuit board 150 by the heat sink 119.

In addition, although the above-described liquid crystal display device is described as being a curved surface type liquid crystal display device in which the display surface of the liquid crystal display panel 210 is curved concavely, Each of the guide frame 240, the storage cover 110, the light guide plate 130, the front portion cover 260, and the outer case 270 may have a planar shape. In this case, 210 in a planar state.

The liquid crystal display device according to the present invention can be applied to a large-sized liquid crystal display device having a large screen such as a small-sized liquid crystal display device such as a computer monitor or a large-screen television

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 or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: storage cover 111: opening
113: bottom part 115: side wall part
117, 1117, 2117: Connector stopper 119: Auxiliary connector stopper
130: light guide plate 150: printed circuit board
155: light emitting diode 170: LED connector
190: Cable 192: Cable connector
210: liquid crystal display panel 219: side sealing member
220: panel drive circuit 230: backlight unit
240: guide frame 250: panel mounting member
260: front portion cover 270: outer case

Claims (15)

A storage cover having a storage space;
A light guide plate having a light-entering portion provided at least on one side surface and housed in the storage space;
A printed circuit board facing the light-incident portion;
A plurality of light emitting diodes mounted on the printed circuit board; And
And an LED connector mounted on the printed circuit board with a cable fastener,
The storage cover
A bottom portion having an opening overlapping with a cable fastener of the LED connector; And
And a connector stopper provided at the bottom portion adjacent to the opening to prevent the LED connector from dropping off from the printed circuit board. The method according to claim 1,
The connector stopper prevents the LED connector from being rotated beyond a critical angle when fastening or detaching the LED connector and the cable connector,
Wherein the LED connector is detached from the printed circuit board when rotated beyond the critical angle. The method according to claim 1,
Wherein the connector stopper protrudes upward from the bottom portion which is in contact with the first side of the opening portion spaced apart from one side of the LED connector facing the light-incoming portion of the light guide plate. The method according to claim 1,
Wherein the connector stopper protrudes downward from the bottom portion which is in contact with the first side of the opening portion which is spaced apart from one side of the LED connector facing the light entrance portion of the light guide plate. 5. The method of claim 4,
The connector stopper prevents the cable connector from tilting beyond the critical angle when fastening or detaching between the LED connector and the cable connector,
Wherein the LED connector is detached from the printed circuit board when the cable connector is inclined beyond the critical angle. The method according to claim 1,
Wherein the connector stopper is bent upward from the bottom portion contacting the first side of the opening portion spaced from one side of the LED connector facing the light-
Wherein the accommodating cover has a pair of slits cut so as to be parallel to each other on the bottom portion contacting the first side of the opening portion and separating each side surface of the connector stopper from the bottom portion. The method according to claim 6,
Wherein the connector stopper is bent to include an oblique sloped surface inclined upwardly from the bottom portion. 8. The method according to any one of claims 3 to 7,
Wherein the storage cover further comprises an auxiliary connector stopper protruding from a lower portion of the bottom portion in contact with a second side of the opening parallel to the first side of the opening portion. A bottom portion having an opening overlapping with a cable fastener of the LED connector mounted on the printed circuit board; And
And a connector stopper provided at the bottom portion adjacent to the opening portion. 10. The method of claim 9,
Wherein the connector stopper protrudes upward or downward from the bottom portion which is in contact with the first side of the opening which is spaced apart from one side of the LED connector. 10. The method of claim 9,
Wherein the connector stopper is bent so as to include an oblique sloped surface that is inclined upward from the bottom portion which is in contact with the first side of the opening portion remote from the side surface of the LED connector. 13. The method according to any one of claims 9 to 12,
Further comprising an auxiliary connector stopper protruding from a bottom portion of the bottom portion which is in contact with a second side of the opening portion parallel to the first side of the opening portion. A backlight unit according to any one of claims 1 to 7;
A liquid crystal display panel disposed on the backlight unit; And
And a guide frame supported by the storage cover and supporting a rear edge portion of the liquid crystal display panel. 14. The method of claim 13,
A panel driving circuit connected to one side of the liquid crystal display panel;
A front portion cover for concealing one edge of the liquid crystal display panel and the panel driving circuit;
A backlight driver disposed on a rear surface of the storage cover and connected to the LED connector through a cable connector; And
Further comprising an outer case accommodating the backlight unit and the backlight driving unit and surrounding the front part cover, the guide frame, and each side of the liquid crystal display panel. 15. The method of claim 14,
The liquid crystal display panel has a concave curved shape,
The front part cover
A front cover part having a curved shape corresponding to the liquid crystal display panel and covering one side edge of the liquid crystal display panel; And
And a side wall cover portion bent from the front cover portion to be coupled to one side portion of the guide frame and covered by the outer case.

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