KR20080048265A - Liquid crystal display - Google Patents

Abstract

An LCD device is provided to fasten a bracket and a top case using pins on which protrusions are at both ends of the pins, thereby fixing an LCD module and a back cover easily. Mounting grooves are formed on a bracket(112). A main support supports an LCD(Liquid Crystal Display) panel(120) and a backlight unit. A top case(118) covers the edge of the LCD panel and the side of the main support. The mounting grooves are formed in the side of the top case. Pins(114) are fixed to the mounting grooves of the top case and are fitted to the mounting grooves of the bracket.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

1 is a cross-sectional view showing a conventional liquid crystal display device.

FIG. 2 is a perspective view illustrating a side mounting method of the liquid crystal display shown in FIG. 1.

3 is a cross-sectional view showing a liquid crystal display device according to an embodiment of the present invention.

4A and 4B are perspective views illustrating a state before and after the top case and the bracket of the liquid crystal display according to the exemplary embodiment of the present invention are fastened.

5 is a side view showing a state in which the top case and the bracket of the liquid crystal display according to the embodiment of the present invention are fastened.

6 is a perspective view showing a pin formed with a first locking step according to an embodiment of the present invention.

7A and 7B are cross-sectional views illustrating a process of forming a second locking step after fastening the pin shown in FIG. 6 to the top case;

<Description of Symbols for Main Parts of Drawings>

110: back cover 112: bracket

114: pin 116: support main

118: top case 120: liquid crystal panel

122: light guide plate 124: reflecting plate

126: optical sheet 128: bottom cover

130: riveting machine

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that can facilitate the fastening of the side mounting method.

Generally, a liquid crystal display device includes a liquid crystal display module, a driving circuit unit for driving the liquid crystal display module, and a case for protecting them.

The liquid crystal display module includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, and a back light unit for irradiating light to the liquid crystal panel. In addition, an optical sheet for vertically propagating light traveling from the backlight unit toward the liquid crystal panel is arranged in the liquid crystal display module. The liquid crystal panel, the backlight unit and the optical sheet should be fastened in an integrated form to prevent light loss and should be protected from being damaged by external impact. To this end, a case surrounding the backlight unit and the optical sheets including the edge of the liquid crystal panel is provided.

The above-described liquid crystal display device is mounted on a portable information processing device such as a notebook personal computer and used as a display device. In particular, the portable information processing apparatus mainly uses a side mounting system for fixing the liquid crystal display to the side by mounting means for slimming.

1 is a cross-sectional view illustrating a conventional liquid crystal display device, and FIG. 2 is a perspective view illustrating a side mounting method of the liquid crystal display device shown in FIG. 1.

1 and 2, a conventional side mounting type liquid crystal display device includes a liquid crystal display module, a back cover supporting a liquid crystal display module from a rear surface of the liquid crystal display module, and a back cover 10. A bracket 12 is fastened to the back cover 10 and a screw 14 is fastened to the bracket 12 and the liquid crystal display module.

The liquid crystal display module includes a support main 16, a liquid crystal panel 20 and a backlight unit stacked inside the support main 16, and edges of the liquid crystal panel 20 and side surfaces of the support main 16. Top Case (18) for wrapping.

The support main 16 is a plastic molded product, and the side wall surface thereof is formed into a stepped stepped surface. The backlight unit and the liquid crystal panel 20 are stacked on the stepped stepped surface of the support main 16.

The liquid crystal panel 20 includes an upper substrate 20a having a color filter (not shown) and a lower substrate 20b having a thin film transistor (not shown). A liquid crystal (not shown) is injected between the upper substrate 20a and the lower substrate 20b of the liquid crystal panel 20 to maintain a constant gap between the upper substrate 20a and the lower substrate 20b. Not provided with a spacer.

The backlight unit includes a lamp assembly (not shown) for generating light to the liquid crystal panel 20, a light guide plate 22 for converting light incident from the lamp assembly into a surface light source, and a light guide plate 22 positioned below the light guide plate 22. A reflecting plate 24 for reflecting light from the liquid crystal panel 20 toward the liquid crystal panel 20, optical sheets 26 for diffusing light through the light guide plate 22 and traveling in a direction perpendicular to the liquid crystal panel 20, and a reflecting plate. (24) It includes the bottom cover 28 located in the back.

The top case 18 surrounds the edge of the liquid crystal panel 20 and the side surface of the support main 16. The first screw hole 18a through which the screw 14 penetrates is formed on the side surface of the top case 18.

The bracket 12 is fixed inside the back cover 10 and is fastened to the top case 18 by a screw 14. The bracket 12 is formed with a second screw hole 12a corresponding to the first screw hole 18a of the top case 18 through which the screw 14 penetrates.

The screw 14 penetrates through the screw holes 12a and 18a formed in the top case 18 and the bracket 12 to fix the liquid crystal display module to the bracket 12.

As described above, the liquid crystal display of the conventional side mounting method uses the screw 14 fastened to the mounting grooves 12a and 18a formed in the top case 18 and the bracket 12 to cover the liquid crystal display module with the back cover 10. ) Fix it. However, when the screw is used for side mounting, metallic foreign substances are generated when the screw 14 is fastened. This metallic foreign matter is likely to enter the electrodes provided around the screw 14 fastening portion and short the respective electrodes. In addition, the work of fastening a plurality of screws 14 one by one is a very difficult situation. As such, the liquid crystal display device requires a new side mounting method that can more easily fix the liquid crystal display module and the back cover 10 without using the screw 14.

Accordingly, an object of the present invention is to provide a liquid crystal display device which can facilitate the fastening of the side mounting method.

In order to achieve the above object, a liquid crystal display device according to an embodiment of the present invention, the bracket having a mounting groove, the support main for supporting the liquid crystal panel and the backlight unit, the edge of the liquid crystal panel and the side of the support main side And a pin fixed to the mounting hole of the top case and fitted into the mounting groove of the bracket.

In the above-described liquid crystal display device, the pin is formed at one end thereof and fixed to the inside of the top case, the second locking step formed at the other end thereof, and between the first locking step and the second locking step. It is characterized in that consisting of a connecting portion fitted in the mounting hole of the top case and the mounting hole of the bracket.

In addition, the second locking step is preferably formed by a riveting process.

The first mounting groove may include a first mounting groove in which an upper side of the bracket is open, and a second mounting groove extending from the first mounting groove to be inclined with the first mounting groove.

In addition, the liquid crystal display device according to the invention is characterized in that it further comprises a back cover to which the bracket is fixed inside.

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

Referring to Figures 3 to 6c will be described a preferred embodiment of the present invention.

3 is a cross-sectional view showing a liquid crystal display device according to an embodiment of the present invention, Figure 4a is a perspective view showing a state before the top case and the bracket of the liquid crystal display device according to an embodiment of the present invention, Figure 4b 4 is a perspective view illustrating a state after the top case and the bracket of the liquid crystal display according to the embodiment are fastened.

3 to 4B, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal display module, a back cover 110 supporting the liquid crystal display module on the back of the liquid crystal display module, and an inner side of the back cover 110. The bracket 112 is fastened to the back cover 110, and the pin (pin, 114) is fitted into the mounting groove 113 of the bracket 112 to fasten the top case 118.

 The liquid crystal display module includes a support main 116, a liquid crystal panel 120 and a backlight unit stacked inside the support main 116, and a top to surround the edges of the liquid crystal panel 120 and the side surfaces of the support main 116. And a case 118.

The bracket 112 is fixed to the inside of the back cover 110 and fastened to the top case 118 of the liquid crystal display module through the pin 114 at the side. To this end, a mounting groove 113 for guiding and fixing the pin 114 is formed in the bracket 112. The mounting groove 113 is a second mounting groove extending in the longitudinal direction of the bracket from the first mounting groove 113a and the first mounting groove 113a having the upper side of the bracket 112 open as shown in FIG. 5. It consists of 113b. The pin 114 is guided through the first mounting groove 113a of the bracket 112 and into the second mounting groove 113b to be seated and fixed.

The pin 114 has a first catching jaw 114a fixed to the top case 118, a second catching jaw 114c fixed to the bracket 112, a first catching jaw 114a and a second catching jaw. It consists of a connection part 114b which connects between 114c.

The pin 114 may use a hollow cylinder, but preferably, use a hollow cylinder. When the pin 114 is fixed to the top case 118, as shown in FIG. 6, the first latching jaw 114a and the connecting portion ( 114b) only. After fixing the first locking step 114a of the pin 114 to the mounting hole 118a of the top case 118, the pin 114 is pressed by the riveting machine 130 as shown in FIG. 7A. 7A and 7B are cross-sectional views illustrating a process of forming a second locking step after the pin shown in FIG. 6 is fastened to the top case. As shown in FIG. 7, when the pin 114 is pressed, the end of the connection portion 114b of the pin 114 extends from the center to the outside as shown in FIG. 7B to form the second locking jaw 114c. . The second locking jaw 114c is formed so that the connecting portion 114b of the pin 114 can be smoothly inserted when the pin 114 is coupled to the mounting groove 113 of the bracket 112. As described above, the pin 114 having the first and second locking jaws 114a and 114c formed at both ends thereof is connected to and fixed to the mounting groove 113 of the bracket 112. As a result, since the bracket 112 is fixed to the back cover 110 and the top case 118 is fixed to the liquid crystal display module, the liquid crystal display module is substantially fixed to the back cover 110.

On the other hand, the support main 116 is a plastic molded material, the side wall surface thereof is formed into a stepped stepped surface. The backlight unit and the liquid crystal panel 120 are stacked on the stepped stepped surface of the support main 116.

The liquid crystal panel 120 includes an upper substrate 120a and a lower substrate 120b. A liquid crystal (not shown) is injected between the upper substrate 120a and the lower substrate 120b of the liquid crystal panel 120, and not shown to maintain a constant gap between the upper substrate 120a and the lower substrate 120b. Not equipped with a spacer.

The upper substrate 120a of the liquid crystal panel 120 includes a color filter, a common electrode, a black matrix, and the like, which are not shown. In addition, signal wirings such as data lines and gate lines, which are not shown, are formed on the lower substrate 120b of the liquid crystal panel 120, and thin film transistors (“TFTs”) are formed at intersections of the data lines and the gate lines. Is formed. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line.

The backlight unit includes a lamp assembly (not shown) for generating light to the liquid crystal panel 120, a light guide plate 122 for converting light incident from the lamp assembly into a surface light source, and a light guide plate 122 positioned below the light guide plate 122. A reflective plate 124 for reflecting light from the light toward the liquid crystal panel 120, optical sheets 126 for diffusing light through the light guide plate 122 and traveling in a direction perpendicular to the liquid crystal panel 120, and a reflective plate 124 includes a bottom cover 128 located on the back.

The lamp assembly is a lamp housing that receives power from the outside to generate light, and a lamp housing that wraps the lamp and surrounds the incident surface of the light guide plate 122 to advance the light emitted from the lamp to the light guide plate 122. It is composed. Here, the lamp is mainly used a cold cathode fluorescent lamp, the lamp housing has a reflective surface on the inner surface to reflect the light from the lamp toward the incident surface of the light guide plate 122.

The light guide plate 122 has an exit surface that is horizontal to the inclined rear surface, and is made so that the incident surface and the exit surface of the light guide plate 122 form a right angle. The light guide plate 122 is generally formed of an acrylic resin (PMMA) having high strength and not easily being deformed or broken and having good transmittance.

The reflector 124 serves to reduce light loss by reflecting light incident to itself through the rear surface of the light guide plate 122 toward the light guide plate 122. When the light from the lamp assembly is incident on the light guide plate 122, the light is reflected at a predetermined inclination angle from the rear surface of the inclined surface to uniformly move toward the exit surface. In this case, the light propagated toward the lower surface and the side surface of the light guide plate 122 is reflected by the reflecting plate 124 to travel toward the exit surface of the light guide plate 122.

The optical sheets 126 may include diffusion sheets for diffusing the light emitted through the light guide plate 122, and prism sheets for refracting the light so that the light is incident perpendicularly to the light incident surface of the liquid crystal panel 120. Include.

The top case 118 surrounds the edge of the liquid crystal panel 120 and the side surface of the support main 116. Mounting holes 118a through which pins 114 penetrate are formed on both side surfaces of the top case 118. The pin 114 fixed through the mounting hole 118a is combined with the top case 118 to maintain a stable fixed state.

As described above, the liquid crystal display according to the present invention fastens the bracket and the top case by using pins having the locking jaws formed at both ends thereof. Accordingly, the liquid crystal display device according to the present invention can fix the liquid crystal display module and the back cover very easily. That is, in the present invention, instead of fastening a plurality of screws one by one, only a pin is inserted into the mounting groove of the bracket, thereby making the work process much easier than before. In addition, the liquid crystal display device according to the present invention does not need to use a screw, so that metallic foreign substances are not generated when the bracket and the top case are fastened.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the 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 (5)

A bracket having a mounting groove, The support main which supports a liquid crystal panel and a backlight unit, A top case surrounding an edge of the liquid crystal panel and a side surface of the support main and having a mounting hole formed at a side thereof; And a pin fixed to a mounting hole of the top case and fitted into a mounting groove of the bracket. The method of claim 1, The pin is formed on one end of the pin and the first locking jaw is fixed to the inside of the top case, A second locking jaw formed at the other end of the pin; And a connecting portion connecting the first and second locking jaws to the mounting hole of the top case and the mounting groove of the bracket. The method of claim 2, And the second locking step is formed by a riveting process. The method of claim 1, The first mounting groove is A first mounting groove having an upper side of the bracket opened; And a second mounting groove extending from the first mounting groove and inclined with the first mounting groove. The method of claim 1, And a back cover to which the bracket is fixed inside.

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