KR20170125514A - Liquid Crystal Display Device - Google Patents

Abstract

The present invention provides a liquid crystal display device capable of improving an assembling property and productivity by providing a fastening frame capable of coupling an optical sheet and a middle cabinet as one component on a cover bottom. To this end, the liquid crystal display device provides the fastening frame composed of first to fourth fastening members. The first and second fastening members are fixed on the cover bottom, the third fastening member couples the middle cabinet, and the fourth fastening member fixes the optical sheet, so that the cover bottom, the middle cabinet, and the optical sheet can be coupled through the fastening frame.

Description

[0001] The present invention relates to a liquid crystal display device,

The present invention relates to a liquid crystal display device which improves a structure for fixing a liquid crystal module or a backlight unit on a cover bottom, and improves the productivity and solidifies the fastening relationship.

As the era of informationization becomes full-scale, the display field for visually displaying electrical information signals is rapidly developing. Accordingly, studies are being continued to develop performance such as thinning, lightening, and low power consumption for various flat display devices.

Typical examples of such flat panel display devices include a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display (FED) An electro-luminescence display device (ELD), an electro-wetting display device (EWD), and an organic light emitting display device (OLED).

These flat panel display devices display an image using a unique light emitting material or a polarizing material interposed between a pair of substrates which are bonded to each other.

Further, the liquid crystal display device includes a liquid crystal panel that displays an image using the optical anisotropy and polarization properties of the liquid crystal. The liquid crystal panel includes a pair of substrates and a liquid crystal layer injected therebetween, and adjusts the light transmittance of each pixel region by adjusting the alignment direction of the liquid crystal. That is, the liquid crystal panel does not generate light by itself, but controls the amount of light emitted from the outside in each pixel region to display an image. Therefore, the liquid crystal display device includes a backlight unit that emits light to the liquid crystal panel.

Such a liquid crystal display device can be mounted as a component of another electronic device. That is, the liquid crystal display device is implemented as a device for displaying an image, or a device equipped with a user interface in various electronic devices such as navigation, notebook or household appliances.

In order to couple the backlight unit and the liquid crystal module on the cover bottom, a plurality of fastening or bonding processes are performed in consideration of the bonding position or the fastening order, And the fixing process is performed through the screw so that the middle cabinet is coupled with the cover bottom when the optical sheet is coupled.

However, since a plurality of fastening processes are performed between the cover bottom and the middle cabinet, the productivity is lowered and the structural rigidity is weakened.

In addition, since a separate structure for fixing only the optical sheet is required, the material cost rises and the quality control cost increases, so that the overall cost is increased.

The present invention provides a liquid crystal display device which is provided between a cover bottom and a middle cabinet to simultaneously perform joining of an optical sheet and a middle cabinet, and can easily couple while supporting a middle cabinet more firmly.

In order to solve the above problems, the present invention provides a fastening frame between a cover bottom and a middle cabinet, thereby joining the optical sheets on the cover bottom and fastening the middle cabinet.

Through this fastening frame, the assembling property between the cover bottom and the middle frame is increased, the production efficiency is increased, and the overall structural rigidity can be increased.

According to the liquid crystal display device according to the present invention,

First, since the coupling of the optical sheet and the middle cabinet can be performed simultaneously through the coupling frame, the production efficiency is increased as compared with the coupling process,

Second, since the process of joining the fastening frame on the cover bottom or fixing the optical sheet on the fastening frame or the process of fastening the middle frame on the fastening frame can be shortened,

Third, since the optical sheet and the middle cabinet are joined by the fastening frame inside the cover bottom, there is an effect that the separate fastening process such as screw fastening is significantly reduced outside the cover bottom.

1 is a perspective view showing a fastening frame portion of a liquid crystal display device according to an embodiment of the present invention.
2 is a perspective view showing a state in which a liquid crystal module is coupled to a middle cabinet of the liquid crystal display device shown in FIG.
Fig. 3 is a perspective view showing a state in which the optical sheet is coupled to the fastening frame of the liquid crystal display shown in Fig. 1. Fig.
FIG. 4 is a perspective view showing a state in which a middle cabinet is coupled to a fastening frame of the liquid crystal display shown in FIG. 3. FIG.
Fig. 5 is a partial cross-sectional perspective view showing a cross section of the liquid crystal display device shown in Fig. 4 partially cut away. Fig.
FIG. 6 is a partial cross-sectional perspective view showing a state in which the liquid crystal module is coupled to the middle frame of the liquid crystal display device shown in FIG. 5;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are to be enlarged or reduced or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 1 is a perspective view showing a fastening frame portion of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which a liquid crystal module is coupled to a middle cabinet of the liquid crystal display device shown in FIG.

Referring to FIGS. 1 and 2, a liquid crystal display 100 according to an embodiment of the present invention includes a liquid crystal module (see FIG. 6) 10 or a backlight unit (not shown) 4) 120 coupled to the cover bottom 110 and the cover bottom 110 and the middle cabinet 120 (see FIG. 4) that support the side or back of the liquid crystal module 10, And the optical sheet 22 is fixed on the cover bottom 110 while interfering with the insertion hole 23 formed in the corner portion of the optical sheet 22 so as to fix the optical sheet 22 to the middle cabinet 120 of the fastening frame 130.

The liquid crystal module 10 includes an upper substrate and a lower substrate which are adhered to each other, and a liquid crystal layer may be provided between the upper substrate and the lower substrate. An alignment layer (not shown) disposed on one side of the upper surface and the lower surface of the liquid crystal layer for initially aligning the liquid crystal inside the liquid crystal layer may be provided, and polarized light may be transmitted through the upper or lower portion of the liquid crystal module 10 A polarizing layer (not shown) may be provided.

The liquid crystal module 10 displays an image by selectively turning on / off a plurality of transistors to form an electric field for changing the arrangement direction of the liquid crystal in each pixel region, thereby adjusting the light transmittance of each pixel region.

When the liquid crystal module 10 is driven by an active matrix method, the liquid crystal module is formed on one of the upper substrate and the lower substrate. And may further include a plurality of thin film transistors (TFTs) corresponding to a plurality of pixel regions. When the liquid crystal module displays a color image, the liquid crystal module further includes a color filter layer (not shown) for filtering hues corresponding to each pixel region.

The backlight unit is disposed on the lower side of the liquid crystal module and irradiates the light toward the liquid crystal module side.

For example, the backlight unit includes a plurality of light sources (not shown) for emitting light, an LED substrate (LED FPCB) on which the plurality of light sources are mounted, a light guide plate LGP for converting light emitted from the plurality of light sources into surface light sources, A plurality of optical sheets 22 disposed between the light guide plate and the liquid crystal module, and a reflector disposed under the light guide plate.

Each of the plurality of light sources may be an LED (Light Emitting Diode) emitting white light.

The cover bottom 110 includes a coupling member 111 for fixing the coupling frame 130 to the bottom surface. The coupling member 111 slidably engages the coupling frame 130. When the coupling frame 130 slides laterally along the bottom surface of the cover bottom 110, the coupling frame 111 supports the coupling frame.

Further, the cover bottom 110 includes a guide member 112 for guiding the flexible frame 130 to elastically flow. A detailed description thereof will be later.

The fastening frame 130 includes a first fastening member 131 fixed to the bottom surface of the cover bottom 110 and a second fastening member 131 integrally bent at both ends of the first fastening member 131, A third fastening member 133 folded from the first fastening member 131 and closely attached to a corner of the cover bottom 110 to fasten the middle cabinet 120, And a fourth fastening member 134 disposed to face the third fastening member 133 and inserted into the fastening hole 23 of the optical sheet 22.

Therefore, the fastening frame 130 is fixed to the cover bottom 110 by the first fastening member 131 and the second fastening member 132 and is fastened to the middle cabinet 120 And fixes the optical sheet 22 through the fourth fastening member 134. As shown in FIG. Since the fastening frame 120 can fix the cover bottom 110, the middle cabinet 120, and the optical sheet 22 at the same time, the assembling property is increased, And the manufacturing cost is reduced.

The first fastening member 131 is formed in a plate shape along the longitudinal direction. And a burring tap 1311 is formed on the inner circumferential surface of the hole 1312. [ At this time, the bolt 1313 coupled from the cover bottom 110 is inserted into the hole 1312, and the first fastening member 131 and the cover bottom 110 are coupled. Further, since the bolt 1313 is fastened through the burring tab 1311, it is not necessary to fasten the bolt 1313 with a separate nut, and more accurate coupling is possible.

The bolts 1313 may be coupled to the holes 1312 such that the bolts 1313 do not protrude from the holes 1312 and the bolts 1313 may protrude further to secure the middle cabinet 120. When the bolt 1313 further protrudes on the hole 1312, the middle cabinet 120 is coupled to the third fastening member 133, and the third fastening member 133 is coupled to the middle cabinet 120, Bolts 1313 project further from the opposite side of the member 133 to support the middle cabinet 120. In this case, the effect that the middle cabinet 120 is more firmly coupled can be expected.

The second fastening member 132 is provided at both ends along the longitudinal direction of the first fastening member 131. The second fastening member 132 is vertically protruded to engage with the engaging member provided on the cover bottom 110. The second fastening member 132 is laterally slidably coupled along the engaging member 111. Therefore, even if the first fastening member 131 is unfastened by loosening the bolt 1313, the fastening frame 130 and the cover bottom 110 can be maintained in a coupled state.

Fig. 3 is a perspective view showing a state in which an optical sheet is coupled to a fastening frame of the liquid crystal display shown in Fig. 1, Fig. 4 is a perspective view showing a state in which a middle cabinet is coupled to a fastening frame of the liquid crystal display shown in Fig. FIG. 5 is a partial cross-sectional perspective view showing a cross section of the liquid crystal display device shown in FIG. 4, and FIG. 6 shows a state in which the liquid crystal module is coupled onto the middle frame of the liquid crystal display device shown in FIG. Fig.

3 to 6, a hook member 1331 protrudes from the third fastening member 133 in a direction facing the fourth fastening member 134. As shown in FIG. The hook member 1331 interferes with the latching member 121 protruding from the bottom surface of the middle cabinet 120. The locking member 121 protrudes downward from the middle cabinet 120 and extends integrally with the hook member 1331 so as not to be detached upwardly from the hook member 1331. The third fastening member 133 may be elastically disposed on the first fastening member 131 and may be bent at a predetermined interval or angle. At this time, the conductive guide member 112 guided by the elastic force of the third fastening member 133 provides a function of preventing the components other than the fastening member 121 from interfering with each other. When the engaging member 121 descends downward, the third engaging member 133 is spaced apart in the direction of the cover bottom 110 while the hook member 1331 interferes with the engaging member 121, As soon as the fastening of the member 1331 is completed, the third fastening member 133 resiliently returns to its original position and the coupling of the middle cabinet 120 and the fastening frame 130 is completed.

The fourth fastening member 134 protrudes upward in the direction in which the third fastening member 133 protrudes and is inserted into the fastening hole 23 of the optical sheet 22, ) Is set.

At this time, although not shown in the drawing, the engagement position is set more precisely between the fourth fastening member 134 and the fastening hole 23, and friction is generated or noise is prevented from being generated by direct contact But may be provided with a separate contact member (not shown). The contact member may be made of rubber or a synthetic resin material having elasticity or absorbing impact.

The first fastening member 131 to the fourth fastening member 134 are integrally formed to facilitate assembly of the fastening frame 130 and the cover bottom 110, The intermediate cabinet 22 and the middle cabinet 120 can be fastened at the same time, so that the manufacturing process is simplified, and productivity is improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. But can be carried out within a range that does not deviate. Accordingly, such modifications are also considered to be within the scope of the present invention, and the true scope of protection of the present invention should be determined by the technical idea of the following claims.

100: liquid crystal display
110: Cover Bottom 120: Middle Cabinet
130: fastening frame 131: first fastening member
132: second fastening member 133: third fastening member
134: fourth fastening member

Claims (7)

A cover bottom which seats the liquid crystal module or the backlight unit inside and protects the outside thereof;
A middle cabinet supporting the side or rear surface of the liquid crystal module and coupled to the cover bottom,
A fastening frame interposed between the cover bottom and the middle cabinet for engaging the middle cabinet while fixing the optical sheet on the cover bottom while interfering with insertion holes formed in corner portions of the optical sheet;
And the liquid crystal display device. The method according to claim 1,
The fastening frame
A first fastening member fixed to the bottom surface of the cover at a long length along the longitudinal direction,
A second fastening member that is bent at both ends in the longitudinal direction of the first fastening member and is slidably engaged with an engaging member provided at an inner bottom surface of the cover bottom;
A third fastening member disposed on one side of the first fastening member and extending in a direction perpendicular to the longitudinal direction of the first fastening member, the third fastening member being closely attached to the corner of the cover bottom,
And a fourth fastening member protruded from the first fastening member and inserted into the fastening hole of the optical sheet. The method of claim 2,
Wherein the first fastening member
And a burning tab is provided on an inner circumferential surface of the cover bottom so as to be penetrated and fixed by a bolt coupled to the cover bottom. The method of claim 2,
Wherein the third fastening member
And a hook member protruding in a direction opposite to the fourth fastening member and being elastically disposed from the first fastening member, the hook member preventing the middle cabinet from being detached. The method of claim 4,
Wherein the middle cabinet includes an engaging member protruded to be fastened to the hook member while being pressed toward the cover bottom direction. The method of claim 5,
The first fastening member is fixed by passing through a bolt coupled to the cover bottom outside, and the bolt is disposed on the other side of the hook member disposed on one side of the engaging member so as to be laterally interfered And the liquid crystal display device further protrudes. The method of claim 4,
The cover bottom,
And a guide member protruding in the direction of the third fastening member to guide the elastic force of the third fastening member.

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