KR101272893B1 - Back light unit and liquid crystal display module using thereof - Google Patents

Abstract

The present invention relates to a liquid crystal display module, and more particularly, to a lamp housing of a backlight unit for preventing the optical sheet from flowing due to deformation of the support main.

A feature of the present invention is to prevent the deformation of the support main form in the process of assembling the liquid crystal display module in the future by forming a protrusion on the upper surface of the lamp housing and inserting it into the groove formed in the support main.

As a result, there is an effect that can prevent the problem caused by the flow of the optical sheet due to the deformation of the support main form in advance, and solves all the problems due to the proposed methods to prevent the deformation of the existing support main form It provides a liquid crystal display module that can be.

Lamp housing, support main, cover bottom, LCD

Description

Back light unit and liquid crystal display module using the same

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

FIG. 2 is a cross-sectional view schematically illustrating how the liquid crystal display module of FIG. 1 is assembled and fastened. FIG.

Figure 3 is a schematic cross-sectional view showing a state in which the support main and the cover bottom fixed using an adhesive tape.

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

5 is a view schematically showing the structure of a lamp housing according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view schematically illustrating how the liquid crystal display module of FIG. 4 is assembled and fastened. FIG.

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

110: support main 120: backlight unit

122: reflecting plates 124a, 124b: first and second fluorescent lamps

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

160: protrusion

The present invention relates to a liquid crystal display module, and more particularly, to a lamp housing of a backlight unit for preventing the optical sheet from flowing due to deformation of the support main.

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. By controlling the arrangement direction of the molecules artificially, various images are displayed by using the light transmittance that is changed.

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.

The backlight unit is largely divided into a direct method and an edge method. The direct method includes a fluorescent lamp located at a lower end of the liquid crystal panel, in which light is directly incident on the front surface of the liquid crystal panel, and consumes high power. It is expensive and has a disadvantage in that the thickness of the liquid crystal display becomes thick.

In contrast, in the edge method, a cold cathode flurescent lamp (CCFL) is mainly used as a method of injecting light into a light guide plate and a reflecting plate by placing a fluorescent lamp on one or both sides of the liquid crystal panel. Lightweight and low power consumption is currently being used widely.

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

The LCD module includes a liquid crystal panel 30, a backlight unit 20, a support main 10, a cover bottom 40, and a top cover 50.

That is, as illustrated, the backlight unit 20 and the liquid crystal panel 30 are stacked on the upper surface of the support main body 10 having a rectangular frame shape, and the cover bottom 40 is formed along the rear surface of the support main body 10. Coupled to, the top cover 50 bordering the edge of the liquid crystal panel 30 is assembled to the support main 10 and the cover bottom 40 so as to fix them all.

In this case, printed circuit boards 34a and 34b connected through at least one side of the liquid crystal panel 30 are connected to each other via a flexible printed circuit board 32.

In the backlight unit 20, fluorescent lamps 24a and 24b including lamp holders are arranged at both ends of the support main body 10 along the inner side of one edge of the support main device 10, and white or white interposed on the upper surface of the support main device 10. The reflection sheet 22 of the silver sheet, the light guide plate 26 mounted on the reflection plate 22 and a plurality of optical sheets 28 covering the same.

In this case, the fluorescent lamps 24a and 24b are arranged in a plurality of first and second fluorescent lamps, and one side of the reflecting plate 22 guides the first and second fluorescent lamps 24a and 24b. A lamp housing 33 is provided.

FIG. 2 is a cross-sectional view schematically illustrating how the liquid crystal display module of FIG. 1 is assembled and fastened.

As shown, the reflection plate 22, the light guide plate 26, the first and second fluorescent lamps 24a, 24b composed of a plurality of layers on one side of the light guide plate 26 and the lamp housing 33 for guiding them At least one optical sheet 28 is stacked inside the light guide plate 26, the support main 10 supporting the liquid crystal panel 30, and the cover bottom 40 are coupled to the rear surface thereof to form a liquid crystal. The top cover 50 bordering the edge of the panel 30 is coupled to the support main 10 and the cover bottom 40.

At this time, the shape of the support main 10 is deformed to the outside in the process of assembling and fastening the liquid crystal display module, thereby causing a problem that the optical sheet 28 bordered by the support main 10 flows. do.

Due to such a problem, the deformation of the support main 10 is prevented through the cover bottom 40 formed on the rear surface of the support main 10 as one of methods for preventing the deformation of the support main 10 in advance. Research is underway.

That is, the cover bottom 40 includes a bottom surface covering the rear surface of the support main 10 and side surfaces formed by four edges of the bottom surface being bent upward to a predetermined height. The main body 10 is configured to penetrate the support main 10 so that the shape of the support main 10 is not deformed.

In addition, as shown in Figure 3, by fixing the cover bottom 40 and the support main 10 through an adhesive tape (tape: 60), to prevent the deformation of the shape of the support main 10, the tape 60 should be attached to at least four places of the liquid crystal display device.

Thus, it is possible to prevent the deformation of the support main 10.

However, such a method of penetrating the cover bottom 40 to the support main 10 may prevent the support main 10 from being deformed, but the cover bottom 40 may be supported by the support main 10. In the process of penetrating the foreign matter generated by the separation of the cover bottom 40 and the support main 10, the drive circuit (34a, 24b of FIG. 1) or the liquid crystal panel (30 of FIG. Frequent foreign matter penetrates inside and degrades the image quality.

In addition, in the penetrating process, the shape of the support main 10 is deformed, causing a ripple-like screen distortion phenomenon such as ripple.

In addition, the method of fixing the cover bottom 40 and the support main 10 using the adhesive tape 60 should be attached to at least four places of the liquid crystal display, and the tape 60 once used is adhesive. Apart from this, there is a problem of increasing the process cost due to difficulty in reuse, and because the process workers are processed by hand one by one, a lot of time and manpower is required, which causes difficulty in process work.

The present invention is to solve the above problems, it is a first object to prevent the deformation of the support main form.

In addition, the second object is to prevent the flow of the optical sheet, and the third object is to reduce the process cost and improve the productivity of the process.

In order to achieve the object as described above, the present invention is a reflection plate; A light guide plate mounted on the reflection plate; A fluorescent lamp arranged along a longitudinal direction of one side of the light guide plate; A lamp housing which guides up, down, and outside of the fluorescent lamp and includes a protrusion; Provided is a backlight unit for a liquid crystal display device including a plurality of optical sheets covering the light guide plate.

A liquid crystal display module having the above-mentioned backlight unit, comprising: a liquid crystal panel seated on the optical sheet; A support main frame that borders the backlight unit and the liquid crystal panel and includes a groove; A cover bottom covering the bottom of the light guide plate; It includes a top cover that borders the front edge of the liquid crystal panel, it provides a liquid crystal display module, characterized in that the protrusion formed in the lamp housing is inserted into the groove of the support main.

The lamp housing has a first surface which is in contact with the support main, a second surface which is parallel to the first surface, and a third surface which is perpendicular to the first and second surfaces. The protruding portion may first bend upwardly of the first surface of the lamp housing to a predetermined height, and then may be secondly bent perpendicularly to the first upwardly bent surface and perpendicularly to the secondly bent surface. After the third downward bending, the fourth outward bending is further characterized.

In addition, the protrusion is characterized in that the embossed shape convex outwardly of the first surface of the lamp housing, the protrusion is characterized in that configured in the longitudinal direction on the first surface of the lamp housing.

In addition, the groove is characterized in that the jaw of the support main for supporting the optical sheet, the groove is characterized in that configured in the side of the support main.

In this case, the protrusion is characterized in that the same height as the side thickness of the support main or less than 90% of the thickness of the support main side, the fluorescent lamp is configured on both sides of the support main, or constituted in multiple layers It features.

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

4 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.

In this case, the liquid crystal panel 130 has driving circuits 134a and 134b connected to each other through the flexible circuit board 132 along at least one edge thereof, so that the side surface of the support main 110 or the back cover 140 are formed in the modularization process. The driving circuits 134a and 134b are respectively connected to a plurality of gate lines (not shown), the gate driving circuit 134b for scanning and transmitting the on / off signal of the thin film transistor, and a plurality of data lines (not shown). The data driver circuit 134a which transfers the image signal for each frame is divided into two adjacent edges of the liquid crystal panel 130.

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. The alignment direction of the liquid crystal molecules is changed by the vertical electric field between the pixel electrode and the common electrode.

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

In this case, the fluorescent lamps 124a and 124b are configured by forming first and second fluorescent lamps in multiple layers, and guide the first and second fluorescent lamps 124a and 124b to one side of the reflector plate 122. The lamp housing 133 includes a protruding portion 160.

In addition, at one edge of the support main 110 in which the fluorescent lamps 124a and 124b are arranged, a groove in which the protrusion 160 is inserted is inserted into a portion of the support main 110 which is in direct contact with the upper surface of the lamp housing 133. have.

Although not shown in the drawing, the groove is configured in the lamp housing 133 at a jaw configured to support the liquid crystal panel 130 at one edge of the support main 110 in which the lamp housing 133 is formed. The protruding portion 160 may be configured to correspond to each other, or by forming one edge side of the support main 110 in a thick manner.

Therefore, the light emitted from the fluorescent lamps 124a and 124b is incident on the side of the light guide plate 126 by the lamp housing 133 and refracted toward the liquid crystal panel 130, while passing through the optical sheet 128. Processed to a high quality of uniform brightness is supplied to the liquid crystal panel 130.

In this case, the backlight unit 120 having the above-described structure is generally called a side light method, and according to the purpose, a plurality of fluorescent lamps 124a and 124b are formed along the inner longitudinal direction of both edges of the support main 110 facing each other. It can also be configured as.

The above-described configuration is similar to that of a general liquid crystal display module, but the present invention particularly fixes the lamp housing 133 to the support main 110 to protrude a portion for preventing the shape of the support main 110 from being deformed. Characterized in further configuration (160). This will be described in detail with reference to FIG. 5.

5 is a view schematically showing the structure of a lamp housing according to an embodiment of the present invention.

As illustrated, the lamp housing 133 has a structure in which one surface is opened to emit light F, and fluorescent lamps (124a and 124b of FIG. 4) are mounted therein, and fluorescent lamps (124a and 124b of FIG. 4) are mounted. A first surface, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces are configured to guide the upper, lower, and outer sides of the upper surface.

At this time, the lamp housing 133 and the fluorescent lamp (124a, 124b of Figure 4) is in close contact so that there is no gap between the light, the light guide plate (FIG. 4124a, 124b of Figure 4) It is preferable to be able to concentrate to the 126) side of 4).

The lamp housing 133 has a first surface, which is an upper surface, and a second surface, which is a lower surface, having the same width, and the first surface further includes a protrusion 160 protruding to a predetermined height.

That is, the protrusion 160 is configured to protrude in a predetermined shape on the first surface which is the upper surface of the lamp housing 133, the protrusion 160 is a predetermined height of the first surface of the lamp housing 133 After the first upward bend to the second bent vertically perpendicular to the first bent upwardly curved surface, the third downward bent vertically perpendicular to the second bent surface, and then the fourth outward bend again Configure. Or, it may be configured in an embossed shape convex outward of the first surface of the lamp housing 133.

The protruding portion 160 is configured in two or more along the longitudinal direction of the lamp housing 133, it is configured to the same height or less than the side thickness of the support main (110 in Fig. 4) to be coupled later. desirable.

As such, the state in which the support main (110 of FIG. 4) is fixed through the protrusion 160 configured in the lamp housing 133 will be described in more detail with reference to FIG. 6.

FIG. 6 is a cross-sectional view schematically illustrating how the liquid crystal display module of FIG. 4 is assembled and fastened.

As illustrated, the reflective plate 122, the light guide plate 126, the first and second fluorescent lamps 124a and 124b formed of a plurality of layers on one side of the light guide plate 126, guide the guide plate, and include a protrusion 160. The lamp housing 133 is configured to include at least one optical sheet 128 on the light guide plate 126, and a support main 110 supporting the liquid crystal panel 130 and a rear surface thereof. The bottom cover 140 is coupled 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, a predetermined groove is formed on the support main 110 so that the protrusion 160 of the lamp housing 133 fits into the groove of the support main 110.

That is, the process of assembling and assembling the liquid crystal display module later by inserting the protrusion 160 formed to protrude in a predetermined shape on the upper surface of the lamp housing 133 into a predetermined groove formed in the support main 110. The shape of the support main 110 may be prevented by fixing the lamp housing 133.

As a result, problems caused by the optical sheet 128 flowing due to the deformation of the support main 110 may be prevented.

In addition, in order to prevent the deformation of the existing support main 110, the problems caused by the foreign substances generated when the cover bottom 140 is penetrated through the support main 110 can be prevented, and the existing adhesiveness Compared to the method of using the tape (60 in FIG. 3), the process cost and the productivity of the process are 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, the process of assembling and then assembling the liquid crystal display device module by further inserting into a predetermined groove formed in the support main by further forming a protrusion configured to protrude in a predetermined shape on the upper surface of the lamp housing according to the present invention. This prevents the shape of the support main from changing.

As a result, there is an effect that can prevent in advance the problems caused by the flow of the optical sheet due to the deformation of the support main, and the process cost reduction and the productivity of the process compared to the conventional method using the red glue tape There is an effect to be improved.

Claims (10)

delete A reflector; A light guide plate mounted on the reflection plate; A fluorescent lamp arranged along a longitudinal direction of one side of the light guide plate; A lamp housing which guides up, down, and outside of the fluorescent lamp and includes a protrusion; A liquid crystal display module comprising a backlight unit including a plurality of optical sheets covering the light guide plate. A liquid crystal panel seated on the optical sheet; A support main frame that borders the backlight unit and the liquid crystal panel and includes a groove; A cover bottom covering the entire bottom surface of the light guide plate; Top cover that borders the front edge of the liquid crystal panel / RTI &gt; The protrusion formed in the lamp housing is inserted into the groove of the support main, The protrusion has the same height as the side thickness of the support main, The lamp housing has a “c” shape consisting of a first surface in contact with the support main, a second surface parallel to the first surface, and a third surface perpendicular to the first and second surfaces, The first and second sides have the same width, The lamp housing and the light guide plate are configured to be spaced apart from each other. LCD display module. delete The method of claim 2, The protruding portion firstly bends the first surface of the lamp housing to a predetermined height, and then secondly bends vertically to the first upwardly bent surface and is perpendicular to the secondly bent surface. And after bending downward, the fourth LCD is bent outwardly again. The method of claim 2, And the protruding portion has an embossing shape that is convex outwardly of the first surface of the lamp housing. The method of claim 2, And the protruding portion is formed along the longitudinal direction on the first surface of the lamp housing. The method of claim 2, The groove is a liquid crystal display module, characterized in that formed in the jaw of the support main for supporting the optical sheet. The method of claim 2, And the groove is formed at a side of the support main. delete The method of claim 2, The fluorescent lamp may be configured on both sides of the support main or in a multilayer.

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