KR20130068548A - Apparatus of liquid crystal display - Google Patents

Abstract

PURPOSE: A liquid crystal display is easily united the guide panels to the bottom cover. CONSTITUTION: A light source is arranged on the side wall of the bottom cover (25). Guide panel (21) supports liquid crystal panel (PNL) and constantly maintains a gap between the liquid crystal panel and the optical sheets (OPS). The liquid crystal panel is arranged on the guide panel. A case top (27) which covers side wall (251) of the bottom cover is coupled to the bottom cover. LED optical source section (LS) attaches the light radiating sheet as a medium to the sidewall of the bottom cover.

Description

Liquid crystal display {Apparatus of liquid crystal display}

The present invention relates to a liquid crystal display device configured to quickly dissipate heat emitted from a light source.

BACKGROUND ART Liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. The liquid crystal display device is used as a portable computer such as a notebook PC, office automation equipment, audio / video equipment, indoor and outdoor advertising display devices, and the like. A transmissive liquid crystal display device that occupies most of the liquid crystal display device controls an electric field applied to the liquid crystal layer to modulate light incident from the backlight unit to display an image.

The backlight unit is divided into a direct type and an edge type. The edge type backlight unit has a structure in which a light source is disposed so as to face the side face of the light guide plate and a plurality of optical sheets are disposed between the liquid crystal panel and the light guide plate. In the edge type backlight unit, a light source irradiates light to one side of a light guide plate, and a light guide plate converts a linear light source or a point light source into a planar light source and irradiates the liquid crystal panel. The direct-type backlight unit has a structure in which a plurality of light sources are disposed under the liquid crystal panel, and irradiates light diffused through the diffusion plate to the liquid crystal panel.

The backlight unit raises the liquid crystal panel thereon, and fixes the liquid crystal panel while covering the sidewalls of the cover bottom with a case top made of metal.

On the other hand, the light source part using LED as a light source is arrange | positioned at the side wall of a cover bottom. Therefore, the heat generated during the operation of the LED light source is conducted to the cover bottom is released. However, when configuring the liquid crystal display, a guide panel made of a plastic molding is positioned between the sidewall of the cover bottom and the case top. Therefore, the heat generated during the operation of the LED light source unit is blocked by the guide panel is not transmitted to the case top side, and is transmitted only to the cover bottom side, there is a problem that the heat discharge efficiency is lowered.

The present invention was devised in such a background, and is intended to allow the heat generated from the LED light source to be discharged through the case top as well as the cover bottom.

In one embodiment of the present invention, a cover bottom, a light source disposed on the side wall of the cover bottom, a guide panel for receiving a light guide plate and an optical sheet between the cover bottom and the liquid crystal panel disposed on the guide panel; And a case top coupled to the cover bottom while covering the side wall of the cover bottom, and the guide panel is fitted to and fixed to the side wall of the cover bottom on which the light source is disposed in a lateral direction, and the case top has the light source disposed thereon. A liquid crystal display device which is in contact with each other while facing a side wall of the cover bottom is disclosed.

The guide panel may include a hook in a hook shape, and the hook may be fitted into a coupling hole provided in a side wall of the cover bottom.

The engaging holes and the hooks may be formed in recesses recessed inward, respectively.

On another sidewall of the cover bottom where the light source is not disposed, the guide panel may be coupled to the other side wall of the cover bottom in a downward direction.

The guide panel may include a cover member surrounding the other side wall of the cover bottom, and the cover member may be positioned between the other side wall of the cover bottom and the case top, and may be fastened to a protrusion provided on the other side wall of the cover bottom. have.

According to one embodiment of the present invention, the guide panel is coupled to the side by using a hook so that the cover bottom and the case top can be fastened in a directly contacted state without interference of the guide panel, thereby increasing the heat dissipation effect of the light source unit, and the light source unit. Where the guide panel is not disposed, the guide panel can be coupled from the top to the bottom so that the guide panel is easily bound to the cover bottom, and the guide panel can be securely fastened to the cover bottom.

1 is a view illustrating a schematic configuration of a liquid crystal display device including an edge type backlight unit.
2 is a schematic exploded view of a liquid crystal display according to an exemplary embodiment of the present invention.
3 is a cross-sectional view taken along line III-III of FIG. 2.
4 is a view showing the guide panel is fastened to the cover bottom through the hook.
5 is a cross-sectional view taken along the line VV of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, when it is determined that a detailed description of known functions or configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 to 2 illustrate a liquid crystal display according to an exemplary embodiment of the present invention. 1 and 2, the liquid crystal display of the present invention includes a liquid crystal panel PNL and an edge type backlight unit BLU disposed under the liquid crystal panel PNL.

The liquid crystal panel PNL includes a liquid crystal layer formed between the upper glass substrate and the lower glass substrate, and may be implemented in an FFS mode, a VA mode, a TN mode, an IPS mode, and the like classified according to the driving type of the liquid crystal layer.

The edge type backlight unit BLU includes a light source LS, a light guide plate LGP, and a plurality of optical sheets OPS to emit light from the light source LS to the light guide plate LGP and the optical sheets OPS. The light is converted into light having a uniform surface light source and supplied to the liquid crystal panel PNL.

The light source LS is preferably composed of a light emitting diode (LED) in this embodiment. The light source LS is disposed to face the side surface (or the light incident surface) of the light guide plate LGP, and supplies light from the side surface of the light guide plate LGP. The light guide plate (LGP) is a plate formed of a transparent plastic, for example, polymethacrylate (PMMA), and serves to convert light in the form of a point light source or a line light source into light in the form of a surface light source. The optical sheets OPS may include at least one prism sheet and at least one diffusion sheet to diffuse light incident from the light guide plate LGP and to emit light at a substantially perpendicular angle with respect to the light incident surface of the liquid crystal panel PNL. Refraction of the traveling path of.

The liquid crystal panel PNL and the backlight unit BLU are located between the cover bottom 25 and the case top 27 and assembled together with the liquid crystal panel PNL and the backlight unit BLU to implement the liquid crystal display illustrated in FIG. 2. At this time, the guide panel 21 is positioned between the backlight unit and the case top 27 to support the liquid crystal panel PNL and to fix the backlight unit. The guide panel 21 is coupled to the cover bottom 25 and fixed.

First, the cover bottom 25 has a thin box shape to accommodate the backlight unit. The backlight unit and the liquid crystal panel (PNL) are sequentially stacked in an empty space of the cover bottom 25 and stored.

Case top 27 has a cross-sectional shape of the 'b' shape so as to be coupled to surround the side wall 251 of the cover bottom (25). The case top 27 packages the backlight unit like the cover bottom 25 to form an exterior of the article, and prevents the backlight unit from being damaged from external impact. The case top 27 and the cover bottom 25 are made of metal sheet such as electro galvanized steel sheet (EGI), stainless steel (SUS), galvalume (SGLC), aluminum plated steel sheet (aka ALCOSTA), and tin plated steel sheet (SPTE). Is produced.

As described above, when the case top 27 and the cover bottom 25 are coupled to each other, the guide panel 21 is positioned to support the liquid crystal panel PNL at the top, and to fix the backlight unit at the bottom. This will be described below with reference to FIG. 3.

In FIG. 3, the guide panel 21 supports the edge surface including the side and the bottom surface of the liquid crystal panel PNL from the edge of the liquid crystal panel PNL from below. In addition, the guide panel 21 supports the liquid crystal panel PNL and maintains a constant gap between the liquid crystal panel PNL and the optical sheets OPS. The guide panel 21 is made of a plastic material that can be molded into a mold, such as polycarbonate (PC).

The case top 27 is coupled to the cover bottom 25 while facing the sidewalls 251 of the guide panel 21 and the cover bottom 25 to form an external appearance of the liquid crystal display.

 The LED light source unit LS is attached to the side wall 251 of the cover bottom 25 via the heat dissipation sheet HS. Accordingly, heat generated in the LED light source unit LS may be directly conducted to the cover bottom 25 through the heat dissipation sheet HS.

This LED light source part LS may be comprised with the light emitting diode 41 and the metal PCB 43 which mounts this light emitting diode. The light emitting diode 41 has a plurality of light emitting diodes mounted in the longitudinal direction of the metal PCB 43, and the light emitting diodes 41 are disposed facing the light incident surface of the light guide plate LGP.

The guide panel 21 is fitted onto the side wall 251 of the cover bottom 25 and fixed to the LED light source part LS. This will be described in more detail with reference to FIG. 4 as follows. As illustrated in FIG. 4, a recess 253 which enters inward is formed in the sidewall 251 of the cover bottom 25. The recess 253 may be formed by partially bending the portion of the side wall 251 higher than the place where the LED light source LS is attached. That is, the recess 253 is formed on the same sidewall 251 as the LED light source unit LS, and is located directly above the LED light source unit LS. This recess 253 is comprised including the 1st engagement hole 253a. The coupling hole 253a has a long shape in the longitudinal direction of the side wall 251. Meanwhile, due to the recess 253, a space is provided between the side wall 251 of the cover bottom 25 and the case top 27.

The guide panel 21 includes a supporting member 211 that supports the edge surface of the liquid crystal panel PNL and forms sidewalls at the edges so as to surround the side surface of the liquid crystal panel PNL. The supporting member 211 recesses 213 recessed inwardly in accordance with the shape of the recess 253 of the cover bottom 25 at a portion of the supporting member 211 that is in contact with the recess 253 provided in the side wall 251 of the cover bottom 25. ) Is formed. Therefore, the guide panel 21 may be coupled in close contact with the side wall 251 of the cover bottom 25 without interference by the recess 253 when the guide panel 21 is coupled.

On the other hand, the supporting member 211 is configured to include a hook (HK). The hook HK has a hook shape protruding from the supporting member 211 toward the recess 253 of the cover bottom 25. The end of the hook (HK) is bent in the shape of a hook, it is also configured so that the edge forms an inclined surface (21a). This inclined surface 21a allows the hook HK to be easily fitted into the first engagement hole 253a.

The guide panel 21 configured as described above is fitted to the hook (HK) in the coupling hole (253a) in the side. At this time, in a state where one end of the guide panel 21 is raised in an oblique direction (a state in which the left side is raised relative to the drawing), the hook HK is aligned with the first coupling hole 253a, and then the hook HK is engaged. Push into the hole 253a to engage. At this time, since the hook HK includes the inclined surface 21a at the edge, it is easy to engage the hook HK in the state which fitted the hook HK to the engagement hole 253a.

On the other hand, even when the hook HK is coupled through the first coupling hole 253a, a space is provided between the cover bottom 25 and the case top 27 due to the recesses 253 and 213, and the space is provided in the space. Since the hooked hook HK is located, no mechanical interference occurs between the cover bottom 25 and the case top 27 by the hook HK. Therefore, the case top 27 may be fastened with the cover bottom 25 in contact with each other with the side wall 251 of the cover bottom 25. Therefore, the LED light source part LS is installed on the side wall 251 of the cover bottom 25 so that the heat generated during the operation is transferred directly to the cover bottom 25 and is in contact with the cover bottom 25. Since it is also transmitted to the case top 27, heat generated in the LED light source unit LS can be quickly discharged.

On the other hand, the guide panel 21 is fastened from the side using the hook (HK) in this way only where the LED light source (LS) is disposed, and in the rest of the guide portion (OT) of the cover bottom 25 of the guide panel 21 The second coupling hole 21b is fitted in the vertical direction to be engaged. This will be described in detail with reference to FIG. 5.

In FIG. 5, the cover bottom 25 houses the backlight assembly as described above, the guide panel 21 supports the liquid crystal panel PNL on the one hand, and the light guide plate between the cover bottom 25. (LGP) and optical sheet (OPS) are positioned to fix them. At this time, the guide panel 21 is fitted and fixed to the protrusion OT provided on the side wall 252 of the cover bottom 25. The protrusion OT may be configured to press the side wall 252 of the cover bottom 25 to protrude outward. This protrusion OT is comprised including the inclined surface 51 which goes up and down. In addition, the guide panel 21 includes a cover member 231 at an edge portion to be coupled while wrapping the side wall 252 of the cover bottom 25. The cover member 231 is positioned between the side wall 251 of the cover bottom 25 and the case top 27 when the guide panel 21 is coupled to the cover bottom 25, and the guide panel 21 covers the cover bottom 25. Bind to (25). The cover member 231 is a position facing the protrusion OT provided on the side wall 251 of the cover bottom 25, and the second coupling hole 21b is formed. The second coupling hole 21b is inserted into the protrusion OT of the cover bottom 25 when the guide panel 21 is fastened to the cover bottom 25 so that the guide panel 21 is attached to the cover bottom 25. To At this time, the inclined surface 51 provided in the protrusion OT guides the guide panel 21 so that the first coupling hole 21b provided in the guide panel 21 can be easily coupled to the protrusion OT.

As described above, since the guide panel 21 is coupled while covering the side wall 252 of the cover bottom 25, the fastening force is greater than the aforementioned hook method. Therefore, this method compensates for the coupling force dropped due to the hook method so that the guide panel 21 can be stably fastened to the cover bottom 25.

When the guide panel 21 configured as described above is fastened to the cover bottom 25, first, the guide panel 21 is set in an oblique direction with respect to the hook HK, and then the hook HK is positioned in the first coupling hole. Press down on the lifted portion to couple the guide panel 21 to the cover bottom 25. Accordingly, the hook HK is fitted into the first engagement hole 251a and the protrusion OT is fastened to the second engagement hole 21b.

In this embodiment, as described above, the guide panel 21 is coupled to the side by using the hook HK, so that the cover bottom 25 and the case top 27 are directly contacted without interfering with the guide panel 21. It is possible to increase the heat dissipation effect of the light source unit LS, while allowing the guide panel 21 to be coupled from the top to the bottom where the light source unit LS is not disposed. It is configured for easy engagement.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the 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 cover bottom,
A light source disposed on sidewalls of the cover bottom;
A guide panel for storing the light guide plate and the optical sheet therebetween;
A liquid crystal panel disposed on the guide panel;
A case top coupled to the cover bottom while covering sidewalls of the cover bottom,
The guide panel is fastened to the side wall of the cover bottom in which the light source is disposed in the side direction,
And the case top is in contact with each other while facing the side wall of the cover bottom on which the light source is disposed. The method of claim 1,
The guide panel includes a hook having a hook shape, and the hook is inserted into and coupled to a coupling hole provided in a sidewall of the cover bottom. The method of claim 2,
And the coupling holes and the hooks are formed in recesses recessed inward. 4. The method according to any one of claims 1 to 3,
And a second sidewall of the cover bottom in which the light source is not disposed, wherein the guide panel is fastened to the other side wall of the cover bottom in a downward direction. 5. The method of claim 4,
The guide panel includes a cover member surrounding the other side wall of the cover bottom,
And the cover member is positioned between the other sidewall of the cover bottom and the case top and is fastened to a protrusion provided on the other sidewall of the cover bottom.

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