KR20070117049A - Liquid crystal display device module - Google Patents

Abstract

An LCD module is provided to prevent a gap defect or a light leakage defect which occurs in assembly of a top cover and maintain a proper distance between the top cover and a liquid crystal panel by removing a bending portion causing those defects. A liquid crystal panel(110) includes a display surface facing forward. A backlight assembly(120) is disposed at the rear of the liquid crystal panel. A support main(140) surrounds an outer edge of the liquid crystal panel and the backlight assembly, and includes a plurality of coupling portions(144,148) facing forward. A cover bottom(150) covers a rear surface of the backlight assembly. A top cover(160) surrounds a front edge of the liquid crystal panel and the support main and includes a plurality of through holes(164,168) into which the plurality of coupling protrusions are respectively inserted.

Description

Liquid crystal display device module

1 is an exploded perspective view of a typical liquid crystal display module.

2A and 2B are schematic diagrams showing defects of a general liquid crystal display module, respectively.

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

4A and 4B are schematic views showing a method of assembling a liquid crystal display module according to the present invention, respectively.

<Description of the symbols for the main parts of the drawings>

110: liquid crystal panel 112, 114: first and second substrate

120: backlight assembly 122: light guide plate

124: fluorescent lamp 126: optical sheet

128: reflective sheet 130: lamp housing

140: support main 142,146: first and second front

144,148: fastening protrusion 150: cover bottom

152: horizontal plane 154: bending part

156: screw insertion hole 160: top cover

162,166: first and second edges 164,168: through hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device (LCD), and more particularly, to a liquid crystal display module (LCD module) integrally modularizing a liquid crystal panel and a backlight assembly. It is about.

Liquid crystal display device, which is widely used in TVs and monitors due to its high contrast ratio, is advantageous for moving image display, and is used for optical anisotropy and polarization of liquid crystals. As the principle of implementation is shown, a liquid crystal panel with a liquid crystal layer interposed between two parallel substrates is an essential component, and the transmittance difference is realized by changing the arrangement direction of the liquid crystal molecules with an electric field in the liquid crystal panel. .

However, since the liquid crystal panel does not have a self-luminous element, a dimming means is required to project the difference in transmittance to the outside. To this end, a cold cathode fluorescent lamp (CCFL) or an external electrode is disposed on the back of the liquid crystal panel. A back light assembly in which a light source such as external electrode fluorescent lamps (EEFL) is incorporated is provided. In this case, the backlight assembly for the liquid crystal display device is classified into a side light type and a direct type according to the relative position of the light source with respect to the liquid crystal panel. The light of the emitted light source is refracted by a separate light guide plate (LGP) to be supplied to the liquid crystal panel, and the latter direct type supplies direct light by placing a plurality of light sources facing the rear of the liquid crystal panel.

Meanwhile, since a liquid crystal panel and a backlight assembly are integrally modularized through various mechanical elements in a general liquid crystal display device, hereinafter, a liquid crystal display module, FIG. 1 is an exploded perspective view of a general liquid crystal display device module. It is shown that the case is used.

As shown, a general liquid crystal display module includes a cover main frame 40 which borders the upper and lower sides of the liquid crystal panel 10 and the backlight assembly 20, and adheres to the rear surface of the backlight assembly 20. The top cover 60 bordering the front edge of the bottom 50 and the liquid crystal panel 10 is assembled through the support main 40 to integrate the whole.

In this case, the liquid crystal panel 10 includes first and second substrates 12 and 14 bonded to each other by facing each other with the liquid crystal layer interposed therebetween, and the backlight assembly 20 includes a light guide plate disposed side by side on the rear surface of the liquid crystal panel 10. 22 and a plurality of optical sheets 26 interposed between the liquid crystal panel 10 and the light guide plate 22 as main components, and fluorescent lamps 24 arranged along at least one side thereof. 22) a lamp housing (30) which guides the upper and lower three directions of the fluorescent lamp 40 in the longitudinal direction except for the inner side facing the light guide plate 22 and the reflective sheet 28 in close contact with the rear surface. Equipped.

In addition, the cover bottom 50 is provided with a first horizontal portion 52 which is in close contact with the rear surface of the backlight assembly 20 and a first bending portion 54 which is vertically protruded upward from the outside thereof and is in close contact with the side of the support main 40. The top cover 60 vertically protrudes downward from the second horizontal surface 62 having a rectangular frame shape and borders the front edge of the liquid crystal panel 10 including the support main 40 to cover the cover bottom 50. The second bending portion 64 in close contact with the first bending portion 54 of the cover cover 50 and the top cover 60 through the first and second bending portions 54 and 64. Take a way to combine with each other.

To this end, as shown in the enlarged view of the circle of FIG. 1, the engaging jaw 56 protruding outward by the lancing and the first through hole 58 perforated at the bottom thereof are formed along the first bending portion 54 of the cover bottom 50. Is provided, along the second bending portion 64 of the top cover 60 is provided with a fitting jaw 66 indented inward by the lancing processing and a second through hole 68 perforated at the upper end thereof, The locking jaw 56 of the first bending part 54 is fitted into the second through hole 68 of the second bending part 64, and the fitting jaw 66 of the second bending part 64 is the first bending part. As the first through-hole 58 of the 54 is fitted, the locking jaw 56 and the fitting jaw 66 are engaged with each other, and the first banding is provided at about 10 locations along the side surface of the support main 40. The cover bump 50 is formed by engaging the engaging jaw 56 of the portion 54 and the fitting jaw 66 and the second through hole 68 of the first through hole 58 and the second bending portion 64 with each other. And the top cover 60 are combined.

However, there are some problems in the coupling method of the general cover bottom 50 and the top cover 60. When the top cover 60 is mainly looked at, the coupling pressure is concentrated to the second bending part 64 so that the second horizontal plane is concentrated. The inner end of the 62 may exert excessive pressure on the liquid crystal panel 10 or vice versa, and in the former case, a so-called gap defect in which the touch stain appears at the edge of the liquid crystal panel 10 may occur. Accompanying this, in the latter case, light leakage defects may occur at the edge of the liquid crystal panel 10.

2A and 2B are partial cross-sectional views of the coupling state of the liquid crystal display module shown in FIG. 1 for explaining a failure phenomenon caused by the assembly of the general cover bottom 50 and the top cover 60, respectively. Since the same reference numerals are used, a separate redundant description is omitted and FIG. 2A corresponds to a gap failure and FIG. 2B corresponds to a light leakage failure.

At this time, the reason for the above defects is found in the coupling between the cover bottom 50 overlapping the support main 40 and the first and second bending portions 54 and 64 of the top cover 60. For example, the second bending portion of the top cover 60 as shown in FIG. 2A may be caused by a design error such as a dimension mismatch of the cover bottom 50 including the support main 40 or a shape deformation due to assembly pressure. When 64 is pressurized in the direction away from the support main 40 at the designated position, the inner end of the second horizontal surface 62 presses the liquid crystal panel 10, and vice versa, that is, FIG. 2B. As shown in FIG. 2, when the second bending portion 64 of the top cover 60 approaches the support main 40, the inner end of the second horizontal surface 62 is turned away from the liquid crystal panel 10.

The change in the distance between the second horizontal plane 62 of the top cover 60 and the liquid crystal panel 10 may cause various side effects such as the second horizontal plane 62 of the top cover 60 and the liquid crystal panel. Considering that the proper interval between 10 is 0.7 ± 0.05mm based on the IPS (In-Plane Switching mode) liquid crystal display and 0.55 ± 0.05mm based on the twisted nematic mode (TN) liquid crystal display, In this case, the corresponding portion of the liquid crystal panel 10 is pressed, leading to gap defects in which stains appear, and in the case of FIG. 2B, light leakage defects occur when light leaks from the corresponding portions.

Accordingly, the present invention has been made to solve the above problems, to solve the various defects that may be involved in the assembly of the cover cover, including the top cover, a liquid crystal display device having a simpler, more convenient and stable assembly structure The purpose is to provide a module.

In order to achieve the above object, the present invention provides a liquid crystal panel having a display surface facing forward; A backlight assembly disposed behind the liquid crystal panel; A support main bordering an outer edge of the liquid crystal panel and the backlight assembly and providing a plurality of fastening protrusions facing forward; A cover bottom covering a rear surface of the backlight assembly; A liquid crystal display module includes a top cover formed by covering a front edge of the liquid crystal panel and the support main, and having a plurality of through holes through which the plurality of fastening protrusions are inserted.

At this time, the plurality of fastening projections, characterized in that protruding from the front of the support main toward the front, the top cover, characterized in that the outer end is located on the front of the support main, The fastening protrusions of the dog are characterized in that each end is bent divided into a locking fastening protrusion and a hook fastening protrusion provided with a hook at each end.

In this case, the hook has a vertically outwardly engaging end and a tapered shape that decreases in thickness toward the front, and the support main has a rectangular frame having first and second edges of long axes parallel to each other. The hook fastening protrusion protrudes from the first edge, and the hook fastening protrusion protrudes from the second edge. In addition, the cover bottom is characterized in that it is fixed by a plurality of screws penetrating through it and inserted into the support main.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

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

As shown, the liquid crystal display module according to the present invention includes a liquid crystal panel 110 and a backlight assembly 120 that are stacked up and down, and cover cover 150 including a support main 140 as a mechanical element for integrating them. The top cover 160 is mobilized. In this case, if the direction on the drawing is redefined for convenience of description, the backlight assembly 120 is disposed behind the liquid crystal panel 110 under the premise that the display surface of the liquid crystal panel 110 faces forward, The cover is in close contact with the top cover 160 and the backlight assembly 120 that border the front edge of the liquid crystal panel 110 in a state where the support frame 140 having the rectangular frame shape is bordered together. The bottom 150 is coupled to each support main 140 in the front and rear is integrated.

Look at each one in more detail.

First, the liquid crystal panel 110 is a part that implements a difference in transmittance for displaying an image. The liquid crystal panel 110 includes first and second substrates 112 and 114 bonded to each other with a liquid crystal layer interposed therebetween. In this case, the liquid crystal panel 110 includes an active matrix type in which pixels, which are basic units of image expression, are arranged in a matrix manner, and are individually controlled by a switching element such as a thin film transistor (TFT). Can be.

In addition, the backlight assembly 120 is disposed at the rear of the liquid crystal panel 110 to supply light such that the difference in transmittance of the liquid crystal panel 110 is projected to the outside, and the backlight assembly 120 for this purpose is cover cover 150. ) So as to face the reflective sheet 128 made of a white or silver high reflectance sheet material, the light guide plate 122 seated on the front surface thereof, and a light incident surface corresponding to at least one side of the light guide plate 122. A fluorescent lamp 124 arranged along the inside of the support main 140 and a plurality of optical sheets 126 interposed between the light guide plate 122 and the liquid crystal panel 110 may be provided. The lamp housing 130 which surrounds the three directions of the front and rear of the fluorescent lamp 124 to guide in the longitudinal direction is arranged together inside the support main 140 so that the light emitted from the 124 is concentrated on the light incident surface of the light guide plate 122. Can be. Therefore, the light emitted from the fluorescent lamp 124 is concentrated on the light incident surface of the light guide plate 122 by the lamp housing 130 and refracted toward the liquid crystal panel 110, and the light reflected by the reflecting sheet 128 and In addition, while passing through the optical sheet 126 is processed to a high quality of uniform brightness is supplied to the liquid crystal panel 110, whereby the liquid crystal panel 110 can display an image toward the front.

In addition, as a mechanical element for integrating the liquid crystal panel 110 and the backlight assembly 120, the support main 140 that borders the liquid crystal panel 110 and the backlight assembly 120 together may be formed of a synthetic resin mold. It has a front facing side and a side facing side and a rear facing cover bottom 150. In this case, in particular, in the liquid crystal display module according to the present invention, the support main 140 provides a plurality of fastening protrusions 144 and 148 facing forwards, provided that the support main 140 is rectangular, and these fastening protrusions 144 and 148 are supported. The first and second front surfaces 142 and 146 corresponding to the two long axes parallel to each other of the main 140 may protrude forward, and may be integrally formed with the support main 140.

In addition, the cover bottom 150 provides a horizontal surface 152 on which the backlight assembly 120 and the support main 140 are mounted, including the liquid crystal panel 110, to support the whole and serve as a lower frame that minimizes light loss. If necessary, a bending portion 154 may be provided vertically bent forward from the outside of the horizontal surface 152 to be in close contact with the side of the support main 140, in this case, the bending portion 154 is a support main ( It is limited to the function of guiding the side of 140 stably to prevent shaking and to maintain a stable fixed state. In addition, the cover bottom 150 may be coupled to the support main 140 by a screw inserted into the support main 140 through four corners or the bending portion 154 of the horizontal surface 152, thereby supporting the main main 140. The cover bottom 150 is already integrated before the top cover 160 is assembled, and the liquid crystal panel 110 and the backlight assembly 120 inside the support main 140 are rearward by the cover bottom 150. Desorption of is prevented. In this case, reference numeral 156 denotes a screw insertion hole for coupling the cover bottom 150 to the support main 140.

Next, the top cover 160 prevents the liquid crystal panel 110 and the backlight assembly 120 from being detached to the front and removes light leakage that may appear in the gap between the liquid crystal panel 110 and the support main 140. It serves as an upper frame, which is made of a horizontal rectangular frame covering the front edge of the liquid crystal panel 110, including the front of the support main 140, a plurality of through holes (164, 168) is perforated One-to-one correspondence with the fastening protrusions 144 and 148 of the support main 140 is performed.

That is, the top cover 160 according to the present invention is not coupled to the bending portion 154 of the cover bottom 150 on the side of the support main 140, unlike the general case, but closely adhered along the front surface of the support main 140. As the edges of the front edge of the liquid crystal panel 110 are omitted, a separate banding portion (see 64 of FIG. 1) that causes various defects, as shown, is omitted, and the whole thereof includes the front edge of the liquid crystal panel 110. It shows a flat shape superimposed on the front surface of the support main 140. In addition, the top cover 160 has a plurality of through holes 164 and 168 perforated in the first and second edges 162 and 166 corresponding to both long axes for coupling with the support main 140, thereby supporting the support main 140. The fastening protrusions 144 and 148 are inserted in a one-to-one correspondence.

Therefore, by fitting the fastening protrusions 144 and 148 of the support main 140 integrated with the cover bottom 150 before the top cover 160 is assembled into the through holes 164 and 168 of the top cover 160, the cover bottom 150 Apart from the support main 140 and the top cover 160 is combined.

Furthermore, the liquid crystal display module according to the present invention is provided from the first and second one surfaces 142 and 146 of the support main 140 for easy assembly and stable coupling of the support main 140 and the top cover 160. Also shown in the plurality of fastening protrusions (144,148) protruding forward, referring to the enlarged view in the garden, the plurality of fastening protrusions (144, 148) are each engaging the protrusions protruding from the first surface 142 of the support main 140 It may be divided into a hook fastening protrusion 148 protruding from the protrusion 144 and the second one surface (146).

The double fastening protrusion 144 is bent toward the front end vertically outward to show a shape of approximately 'a', and the end of the hook fastening protrusion 148 has a vertical locking end and a thickness toward the front therefrom. A taper-shaped hook is provided. The locking fastening protrusions 144 and the hook fastening protrusions 148 are provided on the first and second one surfaces 142 and 146 of the support main 140, respectively, in three pairs. In addition, the through holes 164 and 168 of the top cover 160 are also divided into first and second through holes 164 and 168 through which the engaging fastening protrusion 144 and the hook fastening protrusion 148 are inserted.

Accordingly, in order to couple the top cover 160 and the support main 140 of the liquid crystal display module according to the present invention, the engaging fastening protrusion 144 of the first main surface 142 of the support main 140 and the corresponding top cover (160) After assembling the first through hole 164 of the first edge 162, the hook fastening protrusion 148 of the second surface 146 of the support main 140 and the corresponding top cover A method of final assembly of the second through hole 168 of the second edge 166 is possible, and FIGS. 4A and 4B are schematic diagrams for explaining the coupling and disassembly of the top cover 160, respectively. 4A to 4B show the assembling process and vice versa.

First, as an assembly process, as shown in FIG. 4A, the first through hole 164 of the first edge 162 of the top cover 160 is hooked onto the engaging protrusion 144 of the first surface 142 of the support main 140. In this case, the second through hole 168 of the second edge 166 of the top cover 160 may be pressed into the hook fastening protrusion 148 of the second surface 146 of the support main 140. On the other hand, for disassembling, the support main 140 is disassembled from the hook fastening protrusion 148 of the second surface 146 of the second main surface 146 of the top cover 160 and the second through hole 168 of the second edge 166. 140, the first through hole 164 of the first edge 162 of the top cover 160 may be removed and disassembled from the engaging fastening protrusion 144 of the first one surface 142.

As described above, the liquid crystal display module according to the present invention shows a form in which a bending portion, which is a cause of a gap defect or a light leakage defect, which may be involved in assembling the top cover is omitted, thereby preventing occurrence of the defect in advance. In particular, there is an effect that can maintain a proper distance between the top cover and the liquid crystal panel.

In addition, the liquid crystal display module according to the present invention has an advantage that the top cover and the support main can be easily assembled and can maintain a stable fixed state after assembly.

Claims (7)

A liquid crystal panel having a display surface facing forward; A backlight assembly disposed behind the liquid crystal panel; A support main bordering an outer edge of the liquid crystal panel and the backlight assembly and providing a plurality of fastening protrusions facing forward; A cover bottom covering a rear surface of the backlight assembly; The top cover which covers the front edges of the liquid crystal panel and the support main, and has a plurality of through holes through which the plurality of fastening protrusions are inserted. Liquid crystal display module comprising a. The method of claim 1, The plurality of fastening protrusions, wherein the liquid crystal display device module protrudes from the front surface of the support main toward the front. The method of claim 1, And the top cover of which the outer end is positioned on the front surface of the support main. The method of claim 1, The plurality of fastening protrusions may be divided into hook fastening protrusions each of which is bent outward and hook fastening protrusions provided with hooks at each end thereof. The method of claim 4, wherein And the hook has a vertically outwardly engaging end and a tapered shape that decreases in thickness toward the front thereof. The method of claim 4, wherein The support main may have a rectangular frame shape having first and second edges having long axes parallel to each other, the locking protrusion protrudes from the first edge, and the hook locking protrusion protrudes from the second edge. Display module. The method of claim 1, And the cover bottom is fixed by a plurality of screws penetrating through the support main body and inserted into the support main body.

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