KR101087231B1 - Liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of improving the assemblability of a protective cover for protecting a printed circuit board.

The liquid crystal display according to the present invention includes a liquid crystal panel, a support main for accommodating the liquid crystal panel, a bottom cover surrounding the side and the back of the support main, and a printing connected to the liquid crystal panel and folded to the bottom of the bottom cover. And a circuit board, a protective cover for covering the printed circuit board, and a hook for fastening the bottom cover and the protective cover.

By such a configuration, the present invention uses a hook to fasten a protective cover for covering the data printed circuit board folded to the bottom of the bottom cover to the bottom of the bottom cover. Accordingly, the present invention can shorten the cost and assembly time of the liquid crystal display device, thereby improving the productivity of the liquid crystal display device.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}             

1 is an exploded perspective view showing a conventional liquid crystal display device.

2 is a view showing a protective cover fastened to the bottom cover by a screw.

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

4 is a view showing a hook formed on the bottom cover and the protective cover shown in FIG.

5 is a view showing a protective cover fastened to the back of the bottom cover by the hook shown in FIG.

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

7 is a view showing a hook formed on the bottom cover and the protective cover shown in FIG.

8 is a view showing a protective cover fastened to the back of the bottom cover by the hook shown in FIG.

<Description of Symbols for Main Parts of Drawings>

2, 102: liquid crystal panel 8, 108: data driving integrated circuit

10, 110: data TCP 12, 112: gate drive integrated circuit

14, 114: gate TCP 20, 120: data printed circuit board

22, 122: panel guides 24, 124: support main

26, 126: bottom cover 28, 128: protective cover

30, 130: case top 32: hole

34: screw hole 36: screw

140, 240: hook holes 142, 242: hook projection

144, 244 hook 150: horizontal plane

152: side wall 154: bending surface

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of improving the assemblability of a protective cover for protecting a printed circuit board.

In today's information society, display devices are more important than ever as visual information transfer media. Cathode ray tubes or cathode ray tubes, which are currently mainstream, have problems with weight and volume. Many kinds of flat panel displays have been developed to overcome the limitations of the cathode ray tube.

The flat panel display includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and a light emitting display (LED). Most of these are commercially available and commercially available.

Liquid crystal display devices can meet the trend of light and short and short of electronic products and mass production is improving, and are rapidly replacing cathode ray tubes in many applications.

In particular, an active matrix type liquid crystal display device that drives a liquid crystal cell using thin film transistors (TFTs) has the advantages of excellent image quality and low power consumption. It is rapidly developing in size and high resolution.

Referring to FIG. 1, a conventional liquid crystal display device includes a liquid crystal panel 2, a backlight unit for irradiating light to the liquid crystal panel 2, and a support main housing the backlight unit and the liquid crystal panel 2. Main) 24, a panel guide 22 stacked on the support main 24 to support the liquid crystal panel 2, a bottom cover 26 surrounding the side and back of the support main 24, and a liquid crystal panel. A case top 30 is provided to surround the edge of the end portion 2 and the side surface of the bottom cover 26.

In addition, a conventional liquid crystal display device includes data driving integrated circuits 8 for supplying a data signal to data lines, and data tape carrier packages on which each of the data driving integrated circuits 8 is mounted. 10), a data printed circuit board 20 to which a plurality of data TCPs 10 are attached, and gate driving integrated circuits 12 for supplying a gate signal to gate lines. ), A gate TCP 14 on which each of the gate driving integrated circuits 12 is mounted, and a protective cover 28 for wrapping the data printed circuit board 20.

The liquid crystal panel 2 consists of an upper substrate 6 and a lower substrate 4. A liquid crystal layer (not shown) is formed between the upper substrate 6 and the lower substrate 4 of the liquid crystal panel 2, and illustrated to maintain a constant gap between the upper substrate 6 and the lower substrate 4. A spacer not provided.

The upper substrate 6 of the liquid crystal panel 2 is formed with a color filter, a common electrode, a black matrix, and the like, which are not shown. In this case, the common electrode may be formed on the lower substrate 4 according to the liquid crystal mode of the liquid crystal panel 2. Further, signal wirings such as data lines and gate lines (not shown) are formed on the lower substrate 4 of the liquid crystal panel 2, and thin film transistors are formed at the intersections of the data lines and the gate lines. The thin film transistor switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the gate signal from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line. In the liquid crystal panel 2, data pads and gate pads connected to data lines and gate lines, respectively, are formed. A plurality of TCPs 10 are attached to the data pads. A plurality of gate TCPs 14 are attached to the gate pads. Each of the plurality of data TCPs 10 is attached to a data pad and to a data printed circuit board 20.                         

The data printed circuit board 20 controls driving timings of the data driver integrated circuit 8 and the gate driver integrated circuit 12, and supplies data signals from the outside to the data driver integrated circuit 8. The control unit is mounted. The data printed circuit board 20 is folded to the bottom of the bottom cover 26 via side surfaces of the liquid crystal panel 2, the support main 24, and the bottom cover 28 when the liquid crystal display device is assembled.

The panel guide 22 includes a rectangular frame surrounding the side surface of the liquid crystal panel 2 and a mounting portion for extending the predetermined length from the inner wall of the rectangular frame to seat the liquid crystal panel 2.

There are two types of backlight units: direct type and light guide plate. The direct type method arranges a plurality of lamps in a plane and installs a diffusion plate between the lamp and the liquid crystal panel. The light guide plate method arranges a lamp on the side of the transparent light guide plate. For example, the backlight unit of the conventional liquid crystal display device includes a light guide plate 16, a lamp (not shown) for irradiating light from the light guide plate 16, and a plurality of optical sheets 18 stacked on the light guide plate 16. It is provided.

The light guide plate 16 propagates the light incident from the lamp toward the liquid crystal panel 2. The plurality of optical sheets 18 convert the traveling path of the light emitted from the light guide plate 16 to be perpendicular to the liquid crystal panel 2 to improve the efficiency of the light irradiated onto the liquid crystal panel 2.

The backlight unit generates light by using a lamp, and improves the brightness and efficiency of light generated by the lamp by using the light guide plate 16 and the plurality of optical sheets 18 to the liquid crystal panel 2. I will investigate.

The support main 24 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the backlight unit, the panel guide 22, and the liquid crystal panel 2 described above are stacked and housed therein.

The bottom cover 26 is a metal material to surround the side and back of the support main 24. The bottom cover 26 serves to ground the data printed circuit board 20 and to release heat of the backlight unit. In addition, the bottom cover 26 reflects the light traveling from the lamp toward the bottom cover 26 toward the liquid crystal panel 2, thereby minimizing light loss and improving light efficiency.

The case top 30 may be manufactured in a rectangular band shape and bent to surround the edge of the liquid crystal panel 2 and the side of the bottom cover 26. The case top 30 surrounds the edge of the liquid crystal panel 2 and the side of the bottom cover 26.

As shown in FIG. 2, the protective cover 28 is provided on the bottom of the bottom cover 26 to cover the entirety of the data printed circuit board 20 folded into the bottom of the bottom cover 26. The protection cover 28 is formed with three holes 32 through which the screw 36 fastened to the bottom cover 26 passes.

The bottom cover 26 is formed with three screw holes 36 fastened to each of the screws 34 passing through the protective cover 28.

Accordingly, the protective cover 28 is fixed to the bottom cover 26 by screws 36 which are penetrated through the holes 32 and screwed to each of the screw holes 36 of the bottom cover 26. (20) will be covered.

Such a conventional liquid crystal display device uses at least three screws 36 to fasten the protective cover 28 to the bottom of the bottom cover 26. As a result, the conventional liquid crystal display device has an increased cost due to the fastening of the screw 36 and an assembly process number of the liquid crystal display device. Further, in the conventional liquid crystal display device, metallic foreign substances generated when the screw 36 is fastened are generated, and the metallic foreign substances penetrate into the data printed circuit board 20 or the liquid crystal panel 2.

Accordingly, an object of the present invention is to provide a liquid crystal display device capable of improving the assemblability of a protective cover for protecting a printed circuit board.

In order to achieve the above object, a liquid crystal display according to an embodiment of the present invention, the liquid crystal panel, a support main for accommodating the liquid crystal panel, a bottom cover surrounding the side and the back of the support main, and connected to the liquid crystal panel And a printed circuit board that is folded to the bottom of the bottom cover, a protective cover for covering the printed circuit board, and a hook for fastening the bottom cover and the protective cover.

In the LCD, the hook may include a hook protrusion formed on the bottom cover and a hook hole formed on the protective cover and to which the hook protrusion is coupled.

In the LCD, the hook protrusion may include a protrusion protruding vertically from the bottom of the bottom cover, and a head portion formed in a triangular shape at an end of the protrusion.

In the LCD, the protective cover may include a horizontal surface facing the printed circuit board folded to the bottom of the bottom cover, and sidewalls formed vertically along an edge of the horizontal surface.

In the LCD, the hook hole may be a rectangular hole formed at a position of the sidewall corresponding to the hook protrusion.

In the LCD, the hook protrusion may include a pair of protrusions protruding vertically from the bottom of the bottom cover, and a head portion formed in a triangular shape at each end of the pair of protrusions.

In the liquid crystal display, the protective cover may include a horizontal surface facing the printed circuit board folded to the bottom of the bottom cover, a sidewall formed vertically along an edge of the horizontal surface, and a bent surface bent from the sidewall to face the horizontal surface. It characterized by having a.

In the LCD, the hook hole may be a rectangular hole formed at a position of the bent surface corresponding to the hook protrusion.

The liquid crystal display device includes a plurality of data tape carrier packages attached between the liquid crystal panel and the printed circuit board and mounted with a data driving circuit for driving data lines of the liquid crystal panel, and driving the gate lines of the liquid crystal panel. It characterized in that it further comprises a plurality of gate tape carrier package mounted with a gate driving circuit for.

The liquid crystal display device includes a backlight unit for irradiating light to the liquid crystal panel, a panel guide disposed between the liquid crystal panel and the backlight unit to support the liquid crystal panel, an edge of the liquid crystal panel, and a bottom cover. It further comprises a case top surrounding the side.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 5.

3 and 4, a liquid crystal display according to a first embodiment of the present invention includes a liquid crystal panel 102, a backlight unit for irradiating light to the liquid crystal panel 102, a backlight unit, and a liquid crystal panel. The support main 124 for storing the 102, the panel guide 122 stacked on the support main 124 and supporting the liquid crystal panel 102, and the side and the back of the support main 124 The bottom cover 126 is wrapped, and a case top 130 is formed to surround the edge of the liquid crystal panel 102 and the side surface of the bottom cover 126.

In addition, the liquid crystal display according to the first embodiment of the present invention is a data tape carrier on which data driving integrated circuits 108 for supplying a data signal to data lines and each of the data driving integrated circuits 108 are mounted. Supplying a gate signal to the package carriers (hereinafter referred to as "TCP") 110, a data printed circuit board 120 to which a plurality of data TCPs 110 are attached, and gate lines Gate driving integrated circuits 112, a gate TCP 114 on which the gate driving integrated circuits 112 are mounted, a protective cover 128 for enclosing the data printed circuit board 120, and a bottom cover ( 126 and a hook 144 for fastening the protective cover 128.

The liquid crystal panel 102 includes an upper substrate 106 and a lower substrate 104. A liquid crystal layer (not shown) is formed between the upper substrate 106 and the lower substrate 104 of the liquid crystal panel 102, and illustrated to maintain a constant gap between the upper substrate 106 and the lower substrate 104. A spacer not provided.

The upper substrate 106 of the liquid crystal panel 102 is formed with a color filter, a common electrode, a black matrix, and the like, which are not shown. In this case, the common electrode may be formed on the lower substrate 104 according to the liquid crystal mode of the liquid crystal panel 102. In addition, signal lines such as data lines and gate lines (not shown) are formed on the lower substrate 104 of the liquid crystal panel 102, and thin film transistors (TFTs) are formed at the intersections of the data lines and the gate lines. do. The thin film transistor switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the gate signal from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line.

In addition, the liquid crystal panel 102 is provided with a data pad and a gate pad connected to the data lines and the gate lines, respectively. Multiple TCPs 110 are attached to the data pads. A plurality of gate TCPs 114 are attached to the gate pads. Each of the plurality of data TCPs 110 is attached to a data pad and to a data printed circuit board 120.

The data printed circuit board 120 controls driving timings of the data driver integrated circuit 108 and the gate driver integrated circuit 112, and receives data signals supplied from the outside via the user connector 132. The control part which is not shown in figure which supplies to 108 is mounted. The data printed circuit board 120 is folded to the bottom surface of the bottom cover 126 via side surfaces of the liquid crystal panel 102, the support main 124, and the bottom cover 128 when the liquid crystal display device is assembled.

The panel guide 122 includes a rectangular frame surrounding the side surface of the liquid crystal panel 102 and a seating portion extending from the inner wall of the square frame to a predetermined length to seat the liquid crystal panel 102.

There are two types of backlight units: direct type and light guide plate. The direct type method arranges a plurality of lamps in a plane and installs a diffusion plate between the lamp and the liquid crystal panel. The light guide plate method arranges a lamp on the side of the transparent light guide plate. For example, the backlight unit of the conventional liquid crystal display device includes a light guide plate 116, a lamp (not shown) for irradiating light from the light guide plate 116, and a plurality of optical sheets 118 stacked on the light guide plate 116. It is provided.

The light guide plate 116 propagates the light incident from the lamp toward the liquid crystal panel 102. The plurality of optical sheets 118 convert the traveling path of the light emitted from the light guide plate 116 to be perpendicular to the liquid crystal panel 102 to improve the efficiency of the light irradiated onto the liquid crystal panel 102.

The backlight unit generates light by using a lamp, and improves the brightness and efficiency of light generated by the lamp by using the light guide plate 116 and the plurality of optical sheets 118 to irradiate the liquid crystal panel 102. Done.

The support main 124 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the backlight unit, the panel guide 122, and the liquid crystal panel 102 described above are stacked and received therein.

The bottom cover 126 is a metal material to surround the side and the back of the support main 124. The bottom cover 126 serves to ground the data printed circuit board 120 and release heat of the backlight unit. In addition, the bottom cover 126 reflects the light traveling from the lamp toward the bottom cover 126 toward the liquid crystal panel 102 to minimize the light loss and improve the light efficiency.

The case top 130 is manufactured in a rectangular band shape and is bent to surround the edge of the liquid crystal panel 102 and the side surface of the bottom cover 126. The case top 130 surrounds the edge of the liquid crystal panel 102 and the side surface of the bottom cover 126.

The protective cover 128 protects the data printed circuit board 120 folded to the bottom of the bottom cover 126 from an external force such as an impact from the outside, and grounds the data printed circuit board 120 to form a grounded or external It serves to shield miracle interference and electromagnetic waves.

To this end, the protective cover 128 of the bottom cover 126 to cover the whole of the data printed circuit board 120 folded to the back of the bottom cover 126 by the hook 144 as shown in FIG. It is installed on the back. The protective cover 128 has a form similar to that of the data printed circuit board 120 folded to the bottom of the bottom cover 126.

Specifically, the protective cover 128 is vertically bent along the edge of the horizontal plane 150 opposite to the data printed circuit board 120 folded to the bottom of the bottom cover 126 and the horizontal surface 150 except for the corner portion. The sidewall 152 has a curved surface 154 that is bent from the sidewall 152 to be parallel to the horizontal surface 150. On the other hand, the side wall 152 of the protective cover 128 and the partial region 156 of the horizontal surface 150 carry the user connector 132 formed on the data printed circuit board 120 folded to the bottom of the bottom cover 126 to the outside. Removed to expose.

The hook 144 has a protective cover 128 such that at least three hook protrusions 142 and at least three hook protrusions 142 protrude from the rear surface of the bottom cover 126 as shown in FIG. 4. At least three hook holes 140 are formed in the side wall 152 of FIG.

Each of the at least three hook protrusions 142 formed on the bottom cover 126 has a protrusion projecting vertically from the rear surface of the bottom cover 126 and a head having a triangular shape at the end of the protrusion. Accordingly, each of the at least three hook protrusions 142 is a stepped portion between the protrusion and the head portion. And, the inclined surface of the head portion having a triangular shape to facilitate the fastening by sliding the protective cover 128.

The hook hole 140 formed in the side wall 152 of the protective cover 128 has a side wall 152 of the protective cover 128 corresponding to each of the at least three hook protrusions 142 formed on the bottom of the bottom cover 126. Is formed at the position of. Each of the at least three hook holes 140 is formed through the side wall of the protective cover 128 to have a rectangular shape. Accordingly, each step of each of the at least three hook protrusions 142 is locked to each of the at least three hook holes 140.

Accordingly, the protective cover 128 is fastened and fixed to the rear surface of the bottom cover 126 by the at least three hook protrusions 142 and the at least three hook holes 140 to fix the bottom cover 126. Cover the data printed circuit board 120 folded to the back.

The liquid crystal display according to the first exemplary embodiment of the present invention uses a hook 144 having a hook protrusion 142 formed in the bottom cover 126 and hook holes 140 and 240 formed in the protective cover 128. Thus, the protective cover 128 is fastened to the rear surface of the bottom cover 126. Accordingly, the liquid crystal display device according to the first embodiment of the present invention does not use a screw for fastening the protective cover 128 to the rear surface of the cover bottom 126, and thus, the cost and the assembly of the liquid crystal display device are fastened. Can reduce the time. In addition, the liquid crystal display device according to the first embodiment of the present invention does not generate metallic foreign matters due to the fastening of the screw, so that the metallic foreign matters do not penetrate into the data printed circuit board 120 or the liquid crystal panel 102.

6 and 7, the liquid crystal display according to the second exemplary embodiment of the present invention includes a hook protrusion 242 formed in the bottom cover 126 and a hook hole 240 formed in the protective cover 128. Except for the hook 244 having a has the same configuration as the liquid crystal display according to the first embodiment of the present invention described above. Accordingly, in the liquid crystal display according to the second exemplary embodiment of the present disclosure, descriptions of other components except for the hook 244 will be omitted.

The hook 244 of the liquid crystal display according to the second exemplary embodiment of the present invention includes at least three hook protrusions 242 and at least three hook protrusions protruding from the bottom of the bottom cover 126 as shown in FIG. 7. At least three hook holes 140 are formed in the bent surface 154 of the protective cover 128 so that the 242 is fastened (inserted).

Each of the at least three hook protrusions 242 formed on the bottom cover 126 includes a pair of protrusions projecting vertically from the bottom of the bottom cover 126, and a head portion having a triangular shape at each end of the pair of protrusions. Have Accordingly, each of the at least three hook protrusions 242 has a stepped portion between the protrusion and the head.

The hook hole 240 formed in the bent surface 154 of the protective cover 128 is a bent surface of the protective cover 128 corresponding to each of the at least three hook protrusions 242 formed on the bottom of the bottom cover 126 ( 154 is formed at the position. Each of the at least three hook holes 240 is formed through the bent surface 154 of the protective cover 128 to have a rectangular shape. Accordingly, each step of each of the at least three hook protrusions 242 is fastened to each of the at least three hook holes 240.

Accordingly, the protective cover 128 is fastened and fixed to the rear surface of the bottom cover 126 by the at least three hook protrusions 242 and the at least three hook holes 240 to fix the bottom cover 126. Cover the data printed circuit board 120 folded to the back.                     

The liquid crystal display according to the second exemplary embodiment of the present invention is protected by using a hook 244 having a hook protrusion 242 formed in the bottom cover 126 and a hook hole 240 formed in the protective cover 128. The cover 128 is fastened to the rear surface of the bottom cover 126. Accordingly, the liquid crystal display device according to the second embodiment of the present invention does not use a screw for fastening the protective cover 128 to the rear surface of the cover bottom 126, and thus, the cost and assembly of the liquid crystal display device are fastened. Can reduce the time. In addition, the liquid crystal display device according to the second embodiment of the present invention does not generate metallic foreign matters due to the fastening of the screw, so that the metallic foreign matters do not penetrate into the data printed circuit board 120 or the liquid crystal panel 102.

As described above, the liquid crystal display according to the exemplary embodiment of the present invention fastens a protective cover for covering the data printed circuit board folded to the bottom of the bottom cover using a hook to the bottom of the bottom cover. Accordingly, the present invention can shorten the cost and assembly time of the liquid crystal display device, thereby improving the productivity of the liquid crystal display device.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (10)

LCD panel, A support main housing the liquid crystal panel; Bottom cover which wraps up the side and the back of the support main, A printed circuit board connected to the liquid crystal panel and folded to the bottom of the bottom cover; A protective cover for covering the printed circuit board; A hook for fastening the bottom cover and the protective cover, The hook, A hook protrusion formed on the bottom cover and having at least one head portion formed in a triangular shape, and a hook hole formed on the protective cover and fastened to the hook protrusion, And the head portion formed in the triangular shape has an inclined surface to enable sliding engagement with the protective cover. delete The method of claim 1, The hook protrusion is A protrusion projecting vertically from the rear surface of the bottom cover; And a head portion formed in a triangular shape at the end of the protruding portion. The method of claim 1, The protective cover, A horizontal surface facing the printed circuit board folded to the bottom of the bottom cover; And sidewalls formed vertically along edges of the horizontal plane. The method of claim 4, wherein The hook hole, And a rectangular hole formed at a position of the side wall corresponding to the hook protrusion. The method of claim 1, The hook projection, A pair of protrusions projecting vertically from the rear surface of the bottom cover, And a head portion formed in a triangular shape at each end of each of the pair of protrusions. The method of claim 1, The protective cover, A horizontal surface facing the printed circuit board folded to the bottom of the bottom cover; A sidewall formed vertically along an edge of the horizontal plane; And a bent surface that is bent from the sidewall to face the horizontal plane. The method of claim 7, wherein The hook hole, And a rectangular hole formed at a position of the bent surface corresponding to the hook protrusion. The method of claim 1, A plurality of data tape carrier packages attached between the liquid crystal panel and the printed circuit board and mounted with data driving circuits for driving data lines of the liquid crystal panel; And a plurality of gate tape carrier packages mounted with a gate driving circuit for driving the gate lines of the liquid crystal panel. The method of claim 1, A backlight unit for irradiating light onto the liquid crystal panel; A panel guide disposed between the liquid crystal panel and the backlight unit to support the liquid crystal panel; And a case top surrounding the edge of the liquid crystal panel and the side of the bottom cover.

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