KR20070110578A - Liquid crystal display device module - Google Patents

Abstract

An LCD module is provided to fix a plurality of optical sheets stably by forming a recess, into which protruding portions of optical sheets can be inserted, in an inner surface of a support main. A support main(110) is formed over a cover bottom(140) and includes recesses formed on an inner surface. A fluorescent lamp(124) is disposed at one side of the support main in a length direction. A lamp housing(133) guides the fluorescent lamp. A backlight unit(120) includes a reflection plate(122) and a light guide plate(126) sequentially formed over the cover bottom and a plurality of optical sheets(128) with protruding portions on an edge. A liquid crystal panel(130) is received on the back light unit. A top cover(150) covers an edge of the liquid crystal panel and is coupled to the support main and the cover bottom. The protruding portions of the optical sheets are inserted into the recesses of the support main.

Description

Liquid crystal display device module

1 is an exploded perspective view schematically showing a support main and a backlight unit;

2A to 2B schematically illustrate a state in which the backlight unit of FIG. 1 is bordered by a support main;

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

FIG. 4 is a view schematically illustrating how the backlight unit of FIG. 3 is bordered by a support main; FIG.

FIG. 5 is a cross-sectional view schematically illustrating a state in which a protrusion formed on an optical sheet is inserted into a groove formed on an inner side surface of the support main; FIG.

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

110: support main 120: backlight unit

122: reflector 124: fluorescent lamp

126: light guide plate 128: optical sheet

130: liquid crystal panel 132: flexible circuit board

133: lamp housing

134a, 134b: Gate and Data Printed Circuit Boards

140: Cover Bottom 150: Top Cover

152: groove 154: protrusion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit for a liquid crystal display device, and more particularly, to a method for fixing an optical sheet composed of a plurality.

The image realization principle of a general liquid crystal display device uses the optical anisotropy and polarization property of the liquid crystal. The liquid crystal has a thin and long molecular structure and polarization in which the direction of the molecular array changes according to its size when placed in an electric field and an anisotropy having an orientation in the array. It has a nature. The liquid crystal display is an essential component of a liquid crystal panel composed of a pair of transparent insulating substrates, each having a liquid crystal layer interposed therebetween, and having a field generating electrode formed therebetween. Various images are displayed by artificially adjusting the arrangement direction of the molecules and using the light transmittance which is changed at this time.

Since the liquid crystal panel does not have a light emitting element, it requires a separate light source. As a result, a backlight unit having a fluorescent lamp is provided on the rear surface to irradiate light toward the front of the liquid crystal panel, thereby realizing an image of identifiable luminance.

In addition, a general liquid crystal display device is modularized to prevent the loss of light together with the protection of the liquid crystal panel and the backlight unit, the accompanying Figure 1 is a support main for modularizing the backlight unit, and the disassembly schematically showing the appearance of the backlight unit Perspective view.

The backlight unit (not shown) includes a fluorescent lamp (not shown) arranged along the inner longitudinal direction of the support main 10, and a lamp housing 33 for guiding the fluorescent lamp (not shown). 10) It includes a reflecting plate 22 of a white or silver sheet interposed on the upper surface, a light guide plate 26 seated on the reflecting plate 22 and a plurality of optical sheets 28 covering them.

In this case, protrusions 54 are formed at both edges of the optical sheet 28 in a predetermined shape, and a stepped portion 52 is disposed at a side of the support main 10 corresponding to the protrusion of the optical sheet 28. ) Is configured.

These optical sheets 28 are fixed to the support main 10 through a fixing PAD (not shown) having adhesiveness.

2A to 2B schematically illustrate a state in which the backlight unit of FIG. 1 is bordered by the support main.

As shown in FIG. 2A, the backlight unit (not shown) is framed by the support main 10 and modularized. That is, the backlight unit (not shown) includes a fluorescent lamp (not shown) and the fluorescent lamp (not shown). A lamp housing (not shown) for guiding the light is arranged along the longitudinal direction of the support main 10, and at one side of the fluorescent lamp (not shown), a reflector (not shown), a light guide plate (not shown), and a plurality of optical The sheets 28 are sequentially stacked and bordered.

At this time, the protrusions 54 formed at both edges of the optical sheet 28 are seated on the stepped portion 52 formed at the side of the support main 10, and the fixing PAD 56 is shown in FIG. 2B. By attaching and fixing, the position of the optical sheets 28 can be fixed to prevent the phenomenon of flow of the optical sheets 28.

That is, the optical sheet 28 is integrated by using the support main 10 and the fixing PAD 56 through the protrusions 54 formed at both edges thereof, and thus the optical sheet 28 is fixed without flow.

The fixing PAD 56 is composed of an insulating layer made of polyethylene-based resin, and a double-sided tape for contacting the support main 10. The insulating layer is made of polyethylene terephthalate (PET) and polyvinyl chloride (PVC). Select one of polyethylene-based resins such as polycarbonate (PC), and so on.

At this time, the fixing PAD 56 is attached to at least two to a maximum of six along the edge of the optical sheet 28 and the support main 10.

However, the process of attaching the fixing PAD 56 in this manner is not easy to automate the process by hand, the process of adhesion failure occurs, resulting in a problem that the optical sheet 28 is flowed.

This is not possible to reuse because the adhesion of the fixing PAD 56 during the reassembly process due to poor adhesion, there is a disadvantage that increases the process cost and lowers the production yield.

The present invention is to solve the above problems, the first object is to effectively fix a plurality of optical sheets.

In addition, the second object is to improve the production rate of the process and reduce the process cost.

In order to achieve the object as described above, the present invention is covered covertum; A support main formed on the cover bottom and having a groove formed on an inner side thereof; A fluorescent lamp arranged in a longitudinal direction at one edge of the support main, and a lamp housing for guiding the fluorescent lamp; A backlight unit including a reflective plate and a light guide plate sequentially formed on the cover bottom, and a plurality of optical sheets having protrusions formed at edges thereof; A liquid crystal panel mounted on the backlight unit; And a top cover that is edged to the edge of the liquid crystal panel and is assembled to the support main and the cover bottom, and the protrusion of the optical sheet is inserted into the groove of the support main to be fixed to the module. to provide.

The grooves formed in the support main may be formed at positions corresponding to the protrusions of the optical sheet, and the size and width of the grooves are proportional to the size and width of the protrusions of the optical sheet.

In addition, the protrusion is characterized in that it is configured along both edges of the optical sheet.

Embodiments of the present invention include a cover bottom; A backlight unit including a reflecting plate sequentially formed on the cover bottom, a fluorescent lamp arranged in parallel on the reflecting plate, and a plurality of optical sheets having protrusions at edges; A liquid crystal panel mounted on the backlight unit; A support main frame that borders the backlight unit and has a groove formed on an inner side surface thereof; And a top cover which is edged to the edge of the liquid crystal panel and is assembled to the support main and the cover bottom, wherein the protrusion of the optical sheet is inserted into and fixed to the groove of the support main, and the protrusion is fixed to the It is characterized in that it is configured along both edges of the optical sheet.

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

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

As shown, the liquid crystal display module includes a liquid crystal panel 130, a backlight unit 120, a support main 110, a cover bottom 140, and a top cover 150.

That is, the backlight unit 120 and the liquid crystal panel 130 are stacked on the upper surface of the support main body 110 having a rectangular frame shape, and the cover bottom 140 is coupled along the rear surface of the support main 110. And the top cover 150 to the edge of the liquid crystal panel 130 to be fixed to both of the support main 110 and the cover bottom 140 is assembled and fastened.

At this time, the support main 110 is a mold, it is configured in a rectangular frame shape, characterized in that a predetermined groove 152 on the inner side of the rectangular frame.

The liquid crystal panel 130 is connected to the driving circuits 134a and 134b through at least one edge of the flexible circuit board 132 to the side of the support main 110 or the back cover 140 in the modularization process. The driving circuits 134a and 134b are respectively moved to the gate driving circuit 134b and the data lines (not shown) to scan-transfer the on / off signal of the thin film transistor to the plurality of gate lines (not shown). It is divided into a data driver circuit 134a which transmits an image signal for each frame and is connected to two adjacent edges of the liquid crystal panel 130, respectively.

Therefore, when the thin film transistor selected for each gate line is turned on by the on / off signal voltage of the gate driver circuit 134b which is scanned and transmitted, the signal voltage of the data driver circuit 134a is transferred to the corresponding pixel electrode through the data line. As a result, the arrangement direction of the liquid crystal molecules is changed by the vertical electric field between the pixel electrode and the common electrode, indicating a difference in transmittance.

The backlight unit 120 arranges fluorescent lamps 124 including lamp holders at both ends of the support main 110 along an inner side of one edge of the support main 110, and a white or silver sheet interposed on the upper surface of the support main 110. The reflective plate 122 includes a light guide plate 126 mounted on the reflective plate 122, and a plurality of optical sheets 128 covering the reflective plate 122.

In this case, protrusions 154 having a predetermined shape are formed at both edges of the optical sheet 128, and the protrusions 154 are inserted into grooves 152 formed on the inner side of the support main 110. In addition to preventing the flow of the optical sheet 128, the position of the optical sheet 128 is fixed.

In addition, a lamp housing 133 for guiding the fluorescent lamp 124 is provided.

As a result, the light emitted from the fluorescent lamp 124 is incident on the side of the light guide plate 126 by the lamp housing 133 to be refracted toward the liquid crystal panel 130, and has uniform luminance while passing through the optical sheet 128. It is processed to a high quality of and is supplied to the liquid crystal panel 130.

In this case, the backlight unit 120 having the above-described structure is generally referred to as a side light method, and the fluorescent lamp 124 may be configured along the inner longitudinal direction of both edges of the support main 110 facing each other according to the purpose. Although not shown in the drawings, it is also possible to use a backlight unit of a direct type, in which case the plurality of fluorescent lamps are arranged side by side with the light guide plate 123 omitted in the above-described structure, The optical sheet 128 can be interposed.

The above-described configuration is similar to a general liquid crystal display module, but the present invention particularly includes protrusions 154 formed at both edges of the optical sheet 128 in grooves 152 formed at the inner side of the support main 110. It is characterized by being fixed by insertion. This will be described in detail with reference to FIG. 4.

4 is a diagram schematically illustrating a state in which the backlight unit of FIG. 3 is bordered by a support main.

As shown, the backlight unit 120 of FIG. 3 includes a fluorescent lamp 124 of FIG. 3 and a lamp housing 133 of FIG. 3 that guides the fluorescent lamp 124 of FIG. 110 is arranged along the longitudinal direction, one side of the fluorescent lamp (124 of FIG. 3), the reflecting plate (122 of FIG. 3), the light guide plate (126 of FIG. 3), and a plurality of optical sheets 128 are sequentially stacked It becomes border.

At this time, the protrusions 154 formed at both edges of the optical sheet 128 are inserted into and fixed to the grooves 152 formed at the inner side of the support main 110.

In more detail, FIG. 5 is a cross-sectional view schematically illustrating a protrusion part of the optical sheet inserted into a groove formed on an inner side surface of the support main, as shown in the drawing. And a support main including a plurality of optical sheets 128 having predetermined protrusions 154 formed on both side edges of the light guide plate 126, supporting the liquid crystal panel 130, and having a predetermined groove 152. The cover cover 140 is coupled to the back 110 and the top cover 150 bordering the edge of the liquid crystal panel 130 is coupled to the support main 110 and the cover bottom 140.

In this case, the protrusion 154 of the optical sheet 128 is inserted into and fixed to the groove 152 configured in the support main 110.

The length or width of the groove 152 is configured in proportion to the length and width of the protrusion 154 of the optical sheet 128, the same as the size of the protrusion 154 of the optical sheet 128, The protrusion 154 may be completely fixed or may be freely adjusted so that the protrusion 154 inserted into the groove 152 has a free space.

As a result, the flow of the optical sheet 128 may be prevented and the positions of the optical sheets 128 may be effectively fixed.

As described above, in the method of assembling the liquid crystal display module according to the exemplary embodiment of the present invention, the fluorescent lamps 124 are arranged along the longitudinal direction of the support main 110 having the groove 152 on the inner side, and the support main After the light guide plate 126 is seated in the 110, the plurality of optical sheets 128 are inserted into the grooves 152 of the support main 110 by inserting protrusions 154 formed at both edges of the optical sheet 128. ) Is sequentially mounted on the light guide plate 126.

At this time, the fluorescent lamp 124 of FIG. 3 is guided by the lamp housing 133 of FIG.

After mounting the liquid crystal panel 130 on the plurality of optical sheets 128, the cover cover 140 is assembled and fastened along the back surface of the support main 110, and the top cover (bordering the liquid crystal panel 130) ( By assembling 150, the liquid crystal display module is completed.

As described above, by forming a predetermined groove 152 on the inner side of the rectangular main frame support main 110, the protrusions 154 formed on both edges of the optical sheet 128 is the support main ( It is inserted into the groove 152 of the 110.

Due to this, it is possible to effectively prevent the flow of the optical sheet 128, and to effectively fix the position of the optical sheets 128, by attaching an existing fixing PAD (56 in FIG. 2b), the optical sheet 128 Compared to fixing the flow of), the process cost is reduced and the production yield of the process is improved.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention by forming a groove in which the protrusion of the optical sheet can be inserted into the inner side of the support main, there is an effect that can be stably fixed to the optical sheet consisting of a plurality of, the existing optical Compared with the sheet fixing method, the process cost is reduced and the production yield is improved.

Claims (6)

Covertum; A support main formed on the cover bottom and having a groove formed on an inner side thereof; A fluorescent lamp arranged in a longitudinal direction at one edge of the support main, and a lamp housing for guiding the fluorescent lamp; A backlight unit including a reflective plate and a light guide plate sequentially formed on the cover bottom, and a plurality of optical sheets having protrusions formed at edges thereof; A liquid crystal panel mounted on the backlight unit; The top cover which is bounded by the edge of the liquid crystal panel and assembled to the support main and cover bottom And a protrusion of the optical sheet inserted into the groove of the support main and fixed. The method of claim 1, And a groove formed in the support main is formed at a position corresponding to the protrusion of the optical sheet. The method of claim 1, The size and width of the groove is in proportion to the size and width of the protrusion of the optical sheet. The method of claim 1, And the protrusions are formed along both edges of the optical sheet. Covertum; A backlight unit including a reflecting plate sequentially formed on the cover bottom, a fluorescent lamp arranged in parallel on the reflecting plate, and a plurality of optical sheets having protrusions at edges; A liquid crystal panel mounted on the backlight unit; A support main frame that borders the backlight unit and has a groove formed on an inner side surface thereof; The top cover which is bounded by the edge of the liquid crystal panel and assembled to the support main and cover bottom And a protrusion of the optical sheet inserted into a groove of the support main and fixed. The method of claim 5, And the protrusions are formed along both edges of the optical sheet.

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