KR102316174B1 - 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 capable of preventing damage to the LED connector when the LED connector and the cable connector are fastened. It may include a storage cover provided on the bottom adjacent to the connector stopper having a connector stopper for preventing the LED connector from being detached from the printed circuit board.

Description

A cover for accommodating a backlight unit, and a backlight unit and liquid crystal display including the same

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

A general liquid crystal display displays an image by using a 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, a portable information device, etc. in addition to a display device for a television or a monitor. Since such a liquid crystal display device is not a self-luminous method, an image is displayed using light irradiated from a backlight unit disposed under the liquid crystal display panel.

Recently, a backlight unit using a light emitting diode (LED), which has a long lifespan, low power consumption, and can be miniaturized, has been developed as a light source, and such a backlight unit has been applied from a small liquid crystal display to a large liquid crystal display.

The backlight unit is classified into a direct type and an edge type according to the arrangement position of the light source. Recently, the edge type backlight unit has been widely applied to slim the liquid crystal display device.

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

Referring to FIG. 1 , a typical edge type backlight unit includes a light guide plate 20 accommodated in a storage cover 10 having an opening 11 , and a reflective sheet 30 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) irradiating light to the light incident part of the light guide plate 20 are mounted, and a printed circuit The LED connector 60 is mounted on the board 50 and exposed downward of the accommodation cover 10 through the opening 11 .

The storage 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 that of the LED connector 50 . At this time, one side 11a of the opening 11 is one side 62 of the LED connector 60 facing the light incident part of the light guide plate 20 for the convenience of fastening between the LED connector 60 and the cable connector 72 . ) is spaced apart from the set distance (D).

The LED connector 60 receives the LED driving power supplied from the backlight driving unit (not shown) through the cable 70 and the cable connector 72 , and transmits the received LED driving power through the printed circuit board 50 to a plurality of By providing the light emitting diodes, the plurality of light emitting diodes emit light.

As such, in the backlight unit, the LED connector 60 is fastened with the cable connector 72, at this time, as shown in FIG. 2, the cable connector 72 is an obtuse angle θ ( or oblique), when it is fastened to the LED connector 60, an external force is applied to the LED connector 60, which causes the soldering part of the LED connector 60 to be damaged and the LED connector 60 to the printed circuit board ( 50), there is a problem of dropping out. In addition, when the LED connector 60 and the cable connector 72 are separated, when the cable connector 72 is separated from the lower surface of the accommodation cover 10 at an obtuse angle θ, the LED connector 60 is pushed (or rotated) ), the soldering part of the LED connector 60 is damaged due to a leverage effect based on one end of the LED connector 60 , and there is a problem in that the LED connector 60 is dropped from the printed circuit board 50 .

The present invention has been devised to solve the above problems, and it is technically to provide a backlight unit housing cover capable of preventing damage to the LED connector when the LED connector and the cable connector are fastened, and a backlight unit and liquid crystal display including the same. make it a task

A backlight unit according to the present invention for achieving the above technical problem is provided in a bottom portion having an opening overlapping with a cable fastener of an LED connector, and a connector stopper provided in a bottom portion adjacent to the opening to prevent the LED connector from falling off from a printed circuit board It may include a storage cover having a.

A cover for receiving a backlight unit according to the present invention for achieving the above technical problem includes 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 in the bottom portion adjacent to the opening can do.

A liquid crystal display device according to the present invention for achieving the above technical problem is a printed circuit board when fastening or disconnecting an LED connector and a cable connector mounted on a printed circuit board provided on a receiving cover of a backlight unit disposed under a liquid crystal display panel It may include a connector stopper to prevent the LED connector from falling off.

According to the means for solving the above problems, the present invention can prevent the LED connector from being detached from the printed circuit board when fastening or disconnecting between the LED connector and the cable connector mounted on the printed circuit board.

In addition, according to the present invention, the bezel width of the liquid crystal display can be reduced by exposing the remaining edge portions of the liquid crystal display panel to the outside without being covered by the mechanism, and the step difference at the edge portion of the liquid crystal display panel can be reduced. By removing it, the aesthetics of the liquid crystal display can be improved.

Further, according to the present invention, since the liquid crystal display panel has a concave curved surface, the user's sense of immersion in viewing can be maximized 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 will be clearly understood by those of ordinary skill in the art from such description and description.

1 is a cross-sectional view schematically illustrating a general edge-type backlight unit.
2 is a cross-sectional view for explaining the detachment 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 an opening and a connector stopper of the storage cover shown in FIG. 3 .
5 is a cross-sectional view for explaining the prevention of drop-off 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. 6 .
8 is a view for explaining a modified example of the connector stopper in the backlight unit according to the second example of the present invention.
FIG. 9 is a view for explaining the connector stopper shown in FIG. 8 .
10 is a cross-sectional view illustrating a backlight unit according to a third example of the present invention.
11 is a view for explaining an opening and a connector stopper of the storage cover shown in FIG. 10 .
12 is a cross-sectional view for explaining the prevention of falling off 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.
FIG. 14 is a view for explaining the auxiliary connector stopper shown in FIG. 13 .
15 is a perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.
Fig. 16 is a cross-sectional view taken along line II' shown in Fig. 15;
17 is a cross-sectional view taken along the line II-II' shown in FIG. 15;

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

The singular expression is to be understood as including the plural expression unless the context clearly defines otherwise, and the terms "first", "second", etc. are used to distinguish one element from another, The scope of rights should not be limited by these terms. It should be understood that terms such as “comprise” or “have” do not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof. The term “at least one” should be understood to include all possible combinations from one or more related items. For example, the meaning of "at least one of the first, second, and third items" means 2 of the first, second, and third items as well as each of the first, second, or third items. It means a combination of all items that can be presented from more than one. The term “on” is meant to include not only cases in which a certain component is formed directly on top of another component, but also a case in which a third component is interposed between these components.

Hereinafter, preferred examples of the backlight unit accommodation cover and the backlight unit and liquid crystal display including the same according to the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

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 and a connector stopper of the storage cover shown in FIG. 3 .

3 and 4 , the backlight unit according to the first example 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 part 132 provided on at least one side surface. The light guide plate 130 is disposed on the bottom 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 minimizes light loss by reflecting the light incident through the lower surface of the light guide plate 130 toward the inside of the light guide plate 130 .

Optical sheets 142 are disposed on the light guide plate 130 . The optical sheets 142 serve to improve luminance characteristics of light emitted from the light guide plate 130 . For example, the optical sheets 142 may include, but are not limited to, a lower diffusion sheet, a prism sheet, and an upper diffusion sheet, and a diffusion sheet, a prism sheet, and a dual brightness enhancement film (dual brightness en-hancement). film), and a laminated combination of two or more selected from lenticular sheets.

The printed circuit board 150 is disposed on a side surface of the storage cover 110 to face the light incident part 132 of the light guide plate 130 . A plurality of light emitting diodes (not shown) are mounted on the printed circuit board 150 . Additionally, a plurality of printed circuit boards 150 may be configured according to the length of the light incident part of the light guide plate 130 .

The plurality of light emitting diodes are arranged to have intervals set to prevent hot spots along the longitudinal direction X of the printed circuit board 150 . Each of the plurality of light emitting diodes emits light according to the LED driving power supplied from the LED driving power line provided on the printed circuit board 150 , and irradiates light to the light incident part 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 on the mold frame, and a resin layer covering the light emitting diode chip. In this case, the resin layer may have a lens shape including a phosphor material.

The LED connector 170 is mounted on the printed circuit board 150 while having a connector fastener 171 . The LED connector 170 may be mounted on the printed circuit board 150 by a soldering method, and may be mounted on one edge and/or the other edge of the printed circuit board 150 . The connector fastener 171 is disposed to face the bottom surface of the storage cover 171 . The LED connector 170 receives the LED driving power supplied from the backlight driving unit (not shown) through the cable 190 and the cable connector 192 , and receives a plurality of the received LED driving power through the printed circuit board 150 . By providing the light emitting diode of the plurality of light emitting diodes to emit light.

The accommodation cover 110 accommodates the light guide plate 130 and the printed circuit board 150 , and exposes the connector fastener 171 of the LED connector 170 downwardly. To this end, the storage cover 110 according to an example prevents the bottom part 113 having the opening 111 , the side wall part 115 supporting the printed circuit board 150 , and the LED connector 170 from falling off. and a connector stopper (117).

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

The opening 111 is formed to penetrate a portion of the bottom 113 overlapping the LED connector 170 . The opening 111 has a size larger than the size of the LED connector 170 so that the LED connector 170 can be exposed under the receiving cover 110 . At this time, for the convenience of fastening between the LED connector 170 and the cable connector 192 according to a side locking method, the first side 111a of the opening 111 faces the light incident part of the light guide plate 132 . It is spaced apart from one side 172 of the LED connector 170 by a set distance (D). That is, a gap space of 0.3 to 0.5 mm may be provided between the first side surface 111a of the opening 111 and one side surface 172 of the LED connector 170 .

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

The connector stopper 117 according to the first example is printed by preventing the LED connector 170 from being rotated more than a critical angle when the LED connector 170 and the cable connector 190 are fastened through the cable fastener 171 . The detachment of the LED connector 170 from the circuit board 150 is prevented. That is, when fastening or disconnecting between the LED connector 170 and the cable connector 190 , the LED connector 170 is rotated by more than the critical angle, the lever based on one end (or the upper end) of the LED connector 170 . As a result of the effect, the soldering portion is broken and dropped from the printed circuit board 150 . In order to prevent the LED connector 170 from falling off, the connector stopper 117 prevents the LED connector 170 from being rotated beyond the critical angle through physical contact with the LED connector 170 to prevent the lever effect. It is minimized to prevent the LED connector 170 from being detached from the printed circuit board 150 . Here, the LED connector 170 is to be detached from the printed circuit board 150 by rotation of the critical angle or more along with the accumulation of stress applied to the soldering part when the LED connector 170 and the cable connector 190 are fastened or disconnected. However, according to an experiment, the LED connector 170 may be detached from the printed circuit board 150 when it is rotated more than 7 degrees. Accordingly, in the connector stopper 117 according to the first example, when the LED connector 170 and the cable connector 190 are fastened or disconnected, the rotation threshold angle of the LED connector 170 is preferably set to 7 degrees. It is not limited, and may be changed according to the size of the gap space, which is the distance between the first side surface 111a of the opening 111 and the one side surface 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 in contact with the first side 111a of the opening 111 spaced apart from one side 172 of the LED connector 170 facing the light incident portion 132 of the light guide plate 130 ( 113) by protruding toward the upper direction (Z) to limit the rotation angle of the LED connector 170 through physical contact with the LED connector 170 to less than the critical angle to prevent the LED connector 170 from falling off. That is, the connector stopper 117 protrudes above the bottom portion 113 to have a trapezoidal cross section with one side open, and the one side has an intaglio protrusion facing the side surface 172 of the LED connector 170 . can be The connector stopper 117 may protrude to have a concave groove from the upper portion of the bottom part 113 by a pressing process using the intaglio protrusion or a punching process using the intaglio protrusion.

As such, in the backlight unit according to the first example of the present invention, as shown in FIG. 5 , the cable connector 192 is inclined at an obtuse angle θ (or oblique line) from the lower surface of the storage cover 110 to the LED connector. When engaged with or separated from 170 , the LED connector 170 is prevented from being rotated beyond a critical angle through the connector stopper 117 , thereby preventing the LED connector 170 from being detached from the printed circuit board 150 . That is, the present invention uses the connector stopper 117 to measure the rotation angle of the LED connector 170 that is generated according to the inclination of the cable connector 192 when the LED connector 170 and the cable connector 192 are fastened or disconnected. It is possible to prevent the LED connector 170 from falling off from the printed circuit board 150 by minimizing the leverage effect according to the rotation of the LED connector 170 by limiting it 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 change in the structure of a connector stopper in the backlight unit according to the first example of the present invention. Accordingly, in the following description, only the connector stopper will be described, and redundant descriptions of the remaining components will be omitted.

The connector stopper 1117 according to the second example of the present invention is directed upward from the bottom 113 in contact with the first side 111a of the opening 111 spaced apart from the one side 172 of the LED connector 170 . It is bent towards (Z). In this case, the connector stopper 1117 is inclined from the bottom part 113 toward the top, that is, 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 part 113 .

As such, 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 is fastened or disconnected to less than the critical angle to be less than the threshold angle of the LED connector. By minimizing the leverage effect according to the rotation of 170 , it is possible to prevent the LED connector 170 from falling off from the printed circuit board 150 .

7A and 7B are views for explaining a process of forming the connector stopper shown in FIG. 6 .

First, as shown in FIG. 7A , the connector stopper 1117 according to the second example is provided in a planar shape on the bottom part 113 in contact with the first side surface 111a of the opening 111 . To this end, the storage cover 110 is cut parallel to the bottom portion 113 in contact with the first side surface 111a of the opening 111 to separate both sides of the connector stopper 1117 from the bottom portion 113 . and a pair of slits 118a and 118b.

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

Additionally, the length of the bent connector stopper 1117 may be shortened by bending a portion of the bottom portion 113 in contact with the first side surface 111a of the opening 111 in the connector stopper 1117 . Accordingly, the side surface of the connector stopper 1117 provided in a planar shape on the bottom portion 113 in contact with the first side surface 111a of the opening 111 is designed to extend inside the opening 111 by a predetermined length L. It is preferable to be At this time, the extended length L of the connector stopper 1117 is, as shown in FIG. 6 , the opposite surface 1117a of the connector stopper 1117 facing the one side 172 of the LED connector 170 is the LED Preferably, it is set to be 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, it does not adversely affect the assembly convenience between the LED connector 170 and the cable connector 192, and further minimizes the leverage effect described above. can

On the other hand, the connector stopper 1117 according to the second example, as shown in FIGS. 8 and 9 , in the upper direction Z from the bottom part 113 , that is, one side 172 of the LED connector 170 . It may be bent to include an inclined surface in the form of an oblique line inclined toward the side. For example, the connector stopper 1117 may be bent from the bottom portion 113 to have an inclined portion and a horizontal portion. In this case, the connector stopper 1117 is provided in a planar shape on the bottom part 113 in contact with the first side surface 111a of the opening 111 as shown in FIG. The bottom portion 113 may be bent toward the upper direction (Z) to have a horizontal portion.

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

When the connector stopper 2117 according to the third example of the present invention is fastened or disconnected between the LED connector 170 and the cable connector 192, the cable connector 192 is inclined from the lower surface of the receiving cover 110 by a critical angle or more. The disconnection of the connector 170 from the printed circuit board 150 is prevented by preventing it from falling off. That is, when the cable connector 192 is inclined more than the critical angle, the LED connector 170 may be dropped from the printed circuit board 150 , and the drop-off of the LED connector 170 is to the connector stopper 2117 . will be prevented by

The connector stopper 2117 is a bottom portion in contact with the first side 111a of the opening 111 that is spaced apart from one side 172 of the LED connector 170 facing the light incident portion 132 of the light guide plate 130 ( 113), by protruding toward the lower direction (Z), the inclination of the cable connector 192 through physical contact with the cable connector 192 is limited to less than the critical angle to prevent the LED connector 170 from falling off. For example, the connector stopper 2117 protrudes from the bottom of the bottom part 113 to the lower part of the bottom part 113 so as to have a concave trapezoidal column shape or a quadrangular truncated truncated cross section and is fastened to the LED connector 170 . It may be a embossed protrusion facing the side of the cable connector 192 . The connector stopper 2117 may protrude to have a concave groove from the lower portion of the bottom part 113 by a pressing process using the embossed protrusion or a punching process using the intaglio protrusion.

As such, in the backlight unit according to the third example of the present invention, as shown in FIG. 12 , the cable connector 192 is inclined at an obtuse angle θ from the lower surface of the storage cover 110 to form the LED connector 170 and When fastened or disconnected, the LED connector 170 is prevented from falling off from the printed circuit board 150 by preventing the cable connector 192 from inclining more than a critical angle through the connector stopper 2117 . That is, the present invention uses the connector stopper 2117 to measure the rotation angle of the LED connector 170 that is generated according to the inclination of the cable connector 192 when fastening or disconnecting between the LED connector 170 and the cable connector 192 . By limiting the angle to less than the critical angle, it is possible to prevent the connector 170 from falling off from the printed circuit board 150 by minimizing the leverage effect according to the rotation of the LED connector 170 .

13 is a cross-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 in the backlight unit according to the first example of the present invention. A press connector stopper is additionally configured on the storage cover. Accordingly, in the following description, only the auxiliary connector stopper and related components will be described, and redundant descriptions of the remaining components will be omitted.

The storage cover 110 is an auxiliary connector for preventing the cable connector 192 from being inclined more than a critical angle from the lower surface of the storage cover 110 when the LED connector 170 and the cable connector 192 are fastened or disconnected. A stopper 119 may be further included.

The auxiliary connector stopper 119 vertically protrudes from the bottom portion 113 in contact with the second side 111b of the opening 111 parallel to the first side 111a of the opening 111 in the downward direction Z. can be formed. This auxiliary connector stopper 119 is printed by preventing the cable connector 192 from being inclined more than a critical angle from the lower surface of the receiving cover 110 when fastening or disconnecting between the LED connector 170 and the cable connector 192 . The detachment of the LED connector 170 from the circuit board 150 is prevented.

As such, the backlight unit according to the fourth example of the present invention has a connector stopper ( As the LED connector 170 is primarily prevented from being rotated more than a critical angle with respect to one end through 117), as well as the cable connector 192 is tilted more than a critical angle through the auxiliary connector stopper 119 The LED connector 170 is prevented from being detached from the printed circuit board 150 by secondary preventing the LED connector 170 from being rotated more than a critical angle with respect to the other end. That is, in the present invention, the angle of rotation of the LED connector 170 in the first direction generated according to the inclination of the cable connector 192 or the rotation of the second direction opposite to the first direction is respectively performed by the connector stopper 117 or auxiliary. It is possible to prevent the LED connector 170 from falling off from the printed circuit board 150 by limiting it to less than a critical angle through the connector stopper 119 .

On the other hand, the auxiliary connector stopper 119 may be provided in the same manner 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 , and a description thereof will be omitted. decide to do

15 is a perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 16 is a cross-sectional view taken along line II' shown in FIG. 15, and FIG. 17 is a cross-sectional view taken along line II-II' shown in FIG. 15 . am.

15 to 17 , the liquid crystal display according to an 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 , and a guide frame 240 . ), a panel attachment member 250 , a front partial cover 260 , and an exterior case 270 .

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

The lower substrate 211 is a thin film transistor array substrate, and includes a pixel array including a plurality of pixels (not shown) formed in each pixel area intersected by a plurality of gate lines (not shown) and a plurality of data lines (not shown). include 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 a 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. In addition, a pad part PP connected to each signal line is provided on the lower edge part of the lower substrate 211 , and the pad part PP is connected to the panel driving circuit part 220 .

The upper substrate 213 includes a pixel defining pattern defining 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 oppositely bonded to the lower substrate 211 with the liquid crystal layer interposed therebetween by a sealant to cover the entire lower substrate 211 except for the pad portion PP of the lower substrate 211 . cover

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

The lower polarizing member 215 is attached to the lower surface of the lower substrate 211 , and polarizes light incident from the backlight unit 230 along the first polarization axis to 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 example is a polarizing film that is attached to the upper surface of the upper substrate 213 and polarizes the color light emitted to the outside through the upper substrate 213 in a second polarization axis different from the first polarization axis. can be done The upper polarizing member 217 according to another example is attached to the polarizing film and an upper surface of the polarizing film to separate a 3D image, that is, a left-eye image and a right-eye image, displayed on the liquid crystal display panel 210 into different polarization states. and a retarder film (not shown). In this case, the liquid crystal display panel 210 may be driven in a 2D display mode and a 3D display mode.

As such, the liquid crystal display panel 210 drives the liquid crystal layer according to the electric field formed for each pixel by the data voltage and the common voltage applied to each pixel, thereby displaying a predetermined color image according to the light transmittance of the liquid crystal layer. .

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

The side sealing member 219 is provided to cover each side of the liquid crystal display panel 210 except for the side of the lower edge of the liquid crystal display panel 210 . For example, based on a state in which the display surface of the liquid crystal display panel 210 is vertically erected, the side sealing member 219 is a left surface except for the lower surface of the liquid crystal display panel 210 on which the pad part PP is provided. , the upper left corner portion, the upper surface, the upper right corner portion, and the three side surfaces of the liquid crystal display panel 210 connected to the right surface are directly covered. The side sealing member 219 serves to protect the side surface of the liquid crystal display panel 210 from external impact and prevent side light leakage of the liquid crystal display panel 210 .

The side sealing member 219 may be made of a silicone-based or UV-cured sealing agent (or resin), but considering the process tack time, a UV-cured sealing agent It is preferably made of zero. In addition, the side sealing member 219 may be colored (eg, blue, red, cyan, or black), but is not limited thereto, and may be made of a colored resin or a light blocking resin to prevent side light leakage. desirable.

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

Each of the plurality of flexible circuit films 221 is attached to the pad part PP of the lower substrate 211 and the printed circuit board 225 for display by a film attaching process, and is a tape carrier package (TCP) or COF (Tape Carrier Package) Chip On Flexible Board or Chip On Film). Each of the plurality of flexible circuit films 221 is bent to surround a side surface of the lower edge portion of the liquid crystal display panel 210 and is disposed on the rear surface of the guide frame 240 .

The data driving integrated circuit 223 is mounted on each of the plurality of flexible circuit films 221 and is connected to the pad part PP through the flexible circuit film 221 . The data driving integrated circuit 223 receives the pixel data and the data control signal for each pixel supplied from the timing controller, and converts the pixel data for each pixel into an analog data signal according to the data control signal to generate the pad part PP. through 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 integrated circuit 223 and the gate driving circuit. To this end, various signal wirings, various power supply circuits (not shown), and a memory device (not shown) are mounted on the display printed circuit board 225 .

The timing controller is mounted on the printed circuit board 225 for display and transmits digital image data input from the driving system in response to a timing synchronization signal supplied from an external driving system (not shown) to the pixel arrangement of the liquid crystal display panel 210 . The pixel data for each pixel is generated by arranging to fit the structure, and the generated pixel data for each pixel is provided to the data driving integrated circuit 223 . In addition, the timing controller generates a data control signal and a gate control signal, respectively, based on the timing synchronization signal to control driving timings of the data driving integrated circuit 223 and the gate driving circuit respectively.

Additionally, the timing controller may individually control the luminance of each area of the liquid crystal display panel 210 by controlling the backlight unit 230 through an edge-type local dimming technique.

As such, the liquid crystal display panel 210 connected to the panel driving circuit unit 220 has a preset radius around a virtual reference point or has a preset curvature in order to maximize the user's viewing immersion while improving the deviation of the viewing distance. It can be curved into a concave shape while having it. That is, the liquid crystal display panel 210 is coupled to the guide frame 240 in a curved state in a concave shape by a panel bending process. Here, in the panel bending process, the liquid crystal display panel 210 is concavely bent into a set curved shape while heating to a set temperature, and then the bending state is maintained for a set time 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 rather than a flat shape. For example, the liquid crystal display panel 210 has a curved shape in which the length in the horizontal direction (X) is longer than the length in the vertical direction (Y) and the center in the horizontal direction (X) is concavely curved toward the backlight unit 230 . can have

The backlight unit 230 irradiates light to the lower surface of the liquid crystal display panel 210 . The backlight unit 230 according to an example includes a storage 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 , and The LED connector 170 is included, and the backlight unit 230 has the same configuration as the backlight unit shown in FIGS. 3 to 14 , and thus a redundant description thereof will be omitted.

Meanwhile, the storage cover 110 may have a curved shape corresponding to the concavely curved liquid crystal display panel 210 . That is, the storage cover 110 has a curved surface in which the length in the horizontal direction (X) is longer than the length in the vertical direction (Y) and the central portion in the horizontal direction (X) is concavely curved toward the exterior case (270).

In addition, the light guide plate 130 according to an example may be manufactured in a flat shape and then accommodated in the storage cover 110 to have a curved shape. That is, the flat light guide plate 130 may have a curved shape corresponding to the liquid crystal display panel 210 by being bent concavely by its own weight when accommodated in the storage cover 110 . The light guide plate 130 according to another example may be manufactured to have a curved shape corresponding to the concavely curved liquid crystal display panel 210 and be accommodated in the storage cover 110 .

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 driver 235 generates LED driving power to emit light from the plurality of light emitting diodes 155 . In this case, the backlight driver 235 may individually control the luminance of each region of the liquid crystal display panel 210 by emitting light through the edge-type local dimming technology based on the control of the timing controller.

The rotation of the LED connector 170, which is generated when the cable connector 192 and the LED connector 170 is fastened or disconnected, is a connector stopper 117 (and an auxiliary connector stopper 119) provided on the receiving cover 110 described above. By being limited to less than a critical angle by the LED connector 170 is not dropped from the printed circuit board (150).

The guide frame 240 according to an example has a rectangular frame shape and is supported by sidewalls 115 of the storage cover 110 to support a rear edge portion of the liquid crystal display panel 210 . In this case, one side of the guide frame 240 supports the front cover 260 while surrounding the lower edge side of the liquid crystal display panel 210 , and the remaining part except for one side of the guide frame 240 is the liquid crystal display panel. It may be disposed below the 210 . The guide frame 240 is disposed under the liquid crystal display panel 210 except for one side and does not cover the side surface of the liquid crystal display panel 210 , so that the bezel width of the liquid crystal display can be reduced. To this end, the guide frame 240 according to an example includes a panel attachment part 241 , a guide sidewall 242 , and a protruding sidewall 243 .

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

The guide sidewall 242 is provided at a constant height at the rear edge of the panel attachment part 241 . The guide sidewall 242 is disposed under the liquid crystal display panel 210 to surround each side of the storage cover 110 . In this case, the guide sidewall 242 may be coupled to the sidewall 115 of the accommodation cover 110 by a coupling means such as a screw or a hook.

The protruding sidewall 243 is provided at a constant height at an edge portion of the upper surface of the panel attachment part 241 overlapping the lower edge part of the liquid crystal display panel 210 . That is, the protruding sidewall 243 is provided on one side of the panel attachment part 241 to surround the side surface of the lower edge part of the liquid crystal display panel 210 and support the front cover 260 . In this case, the plurality of flexible circuit films 221 are bent toward the rear surface of the accommodation cover 110 so as to surround the top and side surfaces of the protruding sidewall 243 .

As such, the guide frame 240 according to an example may have a curved shape corresponding to the concavely curved liquid crystal display panel 210 . That is, the guide frame 240 according to an example has a length in the horizontal direction (X) longer than a length in the vertical direction (Y) and a curved shape in which the center of the horizontal direction (X) is concavely curved toward the exterior case (270). have

The panel attachment member 250 physically couples the rear edge of the liquid crystal display panel 210 and the guide frame 240 to each other. That is, the lower surface of the panel attaching member 250 is physically coupled to the panel attaching part 241 of the guide frame 240 , and the upper surface of the panel attaching member 250 is physically attached to the rear edge of the liquid crystal display panel 210 . can be combined with A guide groove is provided in the panel attachment part 241 of the guide frame 240 to which the panel attachment member 250 is attached, and the guide groove is concave to have a predetermined depth from the upper surface of the panel attachment part 241 . Thus, the attachment position of the panel attachment member 250 is defined.

The panel attachment member 250 maintains the curved shape of the concavely 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 supports the guide frame 240 . ) to prevent it from falling off. In this case, the panel attachment member 250 is preferably coupled to the lower substrate 211 of the liquid crystal display panel 210 in consideration of the bonding force and thickness of the guide frame 240 and the liquid crystal display panel 210 . The present invention is not limited thereto, and may be coupled to the lower polarizing member 215 of the liquid crystal display panel 210 . For example, the panel attachment member 250 may be a double-sided tape, a thermosetting adhesive, a photocurable adhesive, or a foam tape, but it is preferably a double-sided tape or a foam tape having a certain elasticity for shock absorption. desirable.

The panel attachment member 250 is applied to remove the top case from the liquid crystal display to reduce the bezel width and the number of parts of the liquid crystal display, and to improve aesthetics. That is, according to the present invention, since the liquid crystal display panel 210 is fixed to the guide frame 240 using the panel attachment member 250 , the liquid crystal display panel 210 supported by the guide frame 240 is provided to prevent the liquid crystal display panel 210 from falling. The conventional top case can be removed. Accordingly, the present invention does not require a top case, which is an essential component of a general liquid crystal display, and the entire remaining front surface except for the lower edge of the liquid crystal display panel 210 is exposed to the outside while having a flat shape. can reduce the bezel width and number of parts. In addition, as the top case is removed, the side surface of the liquid crystal display panel 210 is exposed to the outside, and thus the liquid crystal display panel 210 may be damaged from external impact or may cause side light leakage due to total internal reflection of the liquid crystal display panel 210 . The side surface of the liquid crystal display panel 210 may be protected from external impact through the side sealing member 219 provided on the side surface of the display panel 210 , and side light leakage may be prevented.

The front cover 260 is manufactured to have a curved shape corresponding to the liquid crystal display panel 210 to cover the lower edge of the liquid crystal display panel 210 including the pad portion PP of the lower substrate 211 . are placed The front cover 260 covers the lower edge of the liquid crystal display panel 210 , so that the pad part PP of the lower substrate 211 and the panel driving circuit part 220 connected to the pad part PP are exposed to the outside. conceal it so it doesn't happen.

The front partial cover 260 according to one embodiment includes a front cover part 261 and a side cover part 263 .

The front cover part 261 covers the pad part PP of the liquid crystal display panel 210 and is concavely curved to have a curved shape corresponding to the curved shape of the liquid crystal display panel 210 . The front cover part 261 has a length and a width that can cover the lower edge part of the liquid crystal display panel 210 . The front cover part 261 is disposed to be spaced apart from the front surface (eg, the front surface of the upper polarizing member) of the lower edge part of the liquid crystal display panel 210 by a predetermined distance, and the lower edge of the liquid crystal display panel 210 . It covers the front of the part. That is, the front cover part 261 has a preset radius around a virtual reference point 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 part 263 is bent from the lower side of the front cover part 261 so as to surround one side of the guide frame 240 , that is, the protruding sidewall 243 . The side cover part 263 is detachably coupled to the protruding side wall 243 by a fastening member such as a screw and/or a hook. For example, both edge portions of the side cover part 263, that is, each of the left and right edges, may be coupled to the protruding sidewall 243 by a screw (not shown), and for this purpose, the side cover part 263 ), screw through holes (not shown) are formed at both edges. In addition, portions other than both edge portions of the side cover portion 263 may be coupled to the protruding sidewall 243 through each of a plurality of hooks (not shown) provided at regular intervals.

The exterior case 270 accommodates the storage cover 110 , and wraps the side surface of the front cover 260 and the side surface of the guide frame 240 to form side and rear exteriors of the liquid crystal display. The exterior case 270 according to an example includes a case plate 271 for providing a storage space and a case sidewall 273 .

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

The case sidewall 273 is vertically bent from the edge portion of the case plate 271 to surround the guide sidewall 242 of the guide frame 240 and the side cover portion 263 of the front cover 260 . That is, one side wall of the case side wall 273 surrounds the side cover part 263 of the front partial cover 260, and the remaining side walls of the case side wall 273 are not covered by the front partial cover 260. Guide frame ( The side sealing member 219 provided on the other side surfaces of the liquid crystal display panel 210 and the side surface of the liquid crystal display panel 210 is covered. Accordingly, each side of the liquid crystal display panel 210 is surrounded by the case sidewall 273 , and the upper surface of the lower edge portion of the liquid crystal display panel 210 is covered by the front partial cover 260 . ) except for the lower edge portion, the entire remaining front surface is exposed to the outside without being concealed by a separate mechanism, for example, the guide frame 240 and/or the exterior case.

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

The buffer pad 265 is attached to the inner surface of the front cover 260 , that is, the inner surface of the front cover 261 , and faces the lower edge of the liquid crystal display panel 210 with a gap space therebetween. . In this case, the buffer pad 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 external force by buffering an external force applied to the front partial cover 260 , and foreign substances such as dust are removed from the liquid crystal display panel 210 and the front partial cover. Block or minimize penetration between (260).

As described above, in the liquid crystal display according to an embodiment of the present invention, the remaining edge portions of the liquid crystal display panel 210 except for some edge portions are not covered by a mechanism such as the guide frame 240 and the exterior case 270 and are externally It has a thin bezel width corresponding to the thickness of the outer case 270 by being exposed to , and has an improved aesthetic feeling by removing a step portion at an edge portion. In addition, in the liquid crystal display according to an embodiment of the present invention, when the cable connector 192 and the LED connector 170 are fastened or disconnected, the connector stopper 117 (and the auxiliary connector stopper) provided in the above-described storage cover 110 . (119)), the LED connector 170 from the printed circuit board 150 can be prevented from falling off.

Additionally, although the above-described liquid crystal display is a curved liquid crystal display having a concavely curved display surface of the liquid crystal display panel 210 , the present invention is not limited thereto, and the display of the liquid crystal display panel 210 is not limited thereto. The surface may have a planar shape, and in this case, each of the guide frame 240 , the storage cover 110 , the light guide plate 130 , the front partial cover 260 , and the exterior case 270 is a liquid crystal display panel ( 210) has a planar structure to support it in a planar state.

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

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible without departing from the technical matters of the present invention. It will be clear to those who have the knowledge of Therefore, the scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

110: storage cover 111: opening
113: bottom portion 115: side wall portion
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 driving circuit 230: backlight unit
240: guide frame 250: panel attachment member
260: front partial cover 270: exterior case

Claims (15)

a storage cover having a storage space;
a light guide plate having a light incident portion provided on at least one side thereof and accommodated in the storage space;
a printed circuit board facing the light incident part;
a plurality of light emitting diodes mounted on the printed circuit board; and
An LED connector mounted on the printed circuit board while having a cable fastener,
The storage cover,
a bottom portion having an opening overlapping the cable fastener of the LED connector;
a sidewall portion provided to be bent from an edge portion of the bottom portion in an upper direction of the bottom portion, and to which the printed circuit board is attached; and
and a connector stopper provided on the bottom portion adjacent to the opening to prevent the LED connector from falling off from the printed circuit board,
The connector stopper is spaced apart from one side of the LED connector facing the light incident portion of the light guide plate, the backlight unit. The method of claim 1,
The connector stopper prevents the LED connector from being rotated more than a critical angle when fastening or disconnecting the LED connector and the cable connector,
The LED connector is detached from the printed circuit board when rotated more than the critical angle. The method of claim 1,
wherein the connector stopper protrudes upward from the bottom portion in contact with the first side of the opening spaced apart from one side of the LED connector facing the light incident portion of the light guide plate. The method of claim 1,
wherein the connector stopper protrudes downward from the bottom portion in contact with the first side of the opening spaced apart from one side of the LED connector facing the light incident portion of the light guide plate. 5. The method of claim 4,
The connector stopper prevents the cable connector from being inclined more than a critical angle when fastening or disconnecting the LED connector and the cable connector,
The LED connector is detached from the printed circuit board when the cable connector is tilted more than the critical angle. The method of claim 1,
The connector stopper is bent upwardly from the bottom portion in contact with the first side of the opening spaced apart from one side of the LED connector facing the light incident portion of the light guide plate,
and the storage cover has a pair of slits that are cut parallel to each other on the bottom part in contact with the first side of the opening to separate both side surfaces of the connector stopper from the bottom part. 7. The method of claim 6,
The connector stopper is bent to include an inclined surface in the form of an oblique line inclined toward the upper portion from the bottom portion, the backlight unit. 8. The method according to any one of claims 3 to 7,
The receiving cover further includes 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. a bottom portion having an opening overlapping the cable fastener of the LED connector mounted on the printed circuit board;
a sidewall portion provided to be bent from an edge portion of the bottom portion in an upper direction of the bottom portion, and to which the printed circuit board is attached; and
A cover for receiving a backlight unit provided on the bottom portion adjacent to the opening and comprising a connector stopper spaced apart from one side of the LED connector. 10. The method of claim 9,
The connector stopper protrudes upward or downward from the bottom in contact with the first side of the opening spaced apart from one side of the LED connector. 10. The method of claim 9,
The connector stopper is bent to include an inclined surface in the form of an oblique line inclined toward the top from the bottom in contact with the first side of the opening spaced apart from the side of the LED connector, the backlight unit accommodation cover. 12. The method according to any one of claims 9 to 11,
The cover for receiving a backlight unit further comprising 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. The 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 configured to support 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 cover for hiding one edge of the liquid crystal display panel and the panel driving circuit;
a backlight driving unit disposed on the rear surface of the storage cover and connected to the LED connector through a cable connector; and
and an exterior case accommodating the backlight unit and the backlight driver and enclosing the front 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 edge of the liquid crystal display panel; and
and a sidewall cover part bent from the front cover part so as to be coupled to one side part of the guide frame and covered by the exterior case.

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