KR20070101946A - Liquid crystal display device module - Google Patents

Abstract

A liquid crystal display apparatus module is provided to constitute a light guide panel and a light emitting diode assembly easily in a cover bottom, thereby minimizing damages of the light guide panel and the light emitting diode assembly and improving the productivity and efficiency of a process. A liquid crystal display apparatus module comprises the following parts: a rectangular type support main(127); a light emitting diode assembly(129) which is arranged according to a length direction of an edge point of the support main; a backlight unit including an optical sheet in which a reflection sheet is attached in a rear surface, a reflection plate which is mounted on the support main in sequence, and a light guide panel(123); a cover bottom(135) which is constructed with a first surface attached in a rear side of the support main and a second surface in which edge points of four directions of the first surface is curved; and a top cover(113) which is to be connected to the support main and the cover bottom.

Description

Liquid crystal display device module

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

2 is a cross-sectional view schematically showing the cross section of FIG.

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

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

5 is a schematic cross-sectional view taken along the line VV of FIG. 3.

FIG. 6 is a view schematically illustrating how light emitted from the light emitting diode assembly is incident into a light guide plate; FIG.

7 is a schematic cross-sectional view taken along the line VII-VII of FIG. 3.

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

111: liquid crystal panel 113: case top

121: multiple optical sheets (diffusion sheet, prism sheet, etc.)

123: light guide plate 125: reflecting plate

127: support main 129: light emitting diode assembly

135: cover cover 137: reflective sheet

The present invention relates to a liquid crystal display module, and more particularly, to a structure of a cover bottom in which a backlight unit is mounted.

Recently, with the development of information technology and mobile communication technology, the development of display devices that can visually display information is being made. The display devices are classified into projection type and direct type according to the driving type. It is classified into a self-luminous display having light emitting characteristics and a non-light emitting type capable of emitting light due to other external factors.

The non-emission type display may be, for example, a liquid crystal display (LCD).

Since the LCD does not have a light emitting element, it requires a separate light source. Accordingly, a backlight unit is provided on the back to irradiate light toward the front of the LCD, thereby realizing an identifiable image.

The backlight unit uses a Cold Cathode Fluoresent Lamp (CCFL), an External Electrode Fluoresent Lamp (EEFL), and a Light Emitting Diode (LED) as a light source.

Among them, light emitting diodes (LEDs) have been widely used as light sources for display, having features such as small size, low power consumption, and high reliability.

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

As illustrated, a general liquid crystal display module includes a liquid crystal panel 11, a backlight unit 20, a support main 27, a cover bottom 35, and a case top 13.

That is, as shown in the figure, the backlight unit 20 and the liquid crystal panel 11 are stacked on the upper surface of the support main 27 having a rectangular frame shape, and the shape of the support main 27 is prevented. The cover bottom 35 is coupled along the rear surface of the support main 27, and the case top 13 bordering the edge of the liquid crystal panel 11 is fixed to the support main 27 and the cover bottom to fix all of them. 35) is assembled and fastened.

At this time, a printed circuit board 17 connected to at least one side of the liquid crystal panel 11 via a flexible printed circuit board 15 is bent and connected to the rear surface of the cover bottom. In addition, the backlight unit 20 includes a light emitting diode assembly 29 configured along a longitudinal direction of one open edge of the support main 27, a white or silver reflecting plate 25 interposed on an upper surface of the cover bottom 35, The light guide plate 23 mounted on the reflective plate 25 and a plurality of optical sheets 21 covering the light guide plate 23 are included.

In this case, the light emitting diode assembly 29 used as a light source of the liquid crystal display device is formed on the same plane as the light guide plate 23, and the light emitting diode assembly 29 is formed of a light emitting diode mounted on a printed circuit board and emits light. It includes a flexible circuit board connected to the light emitting diode printed circuit board mounted with a control unit for controlling.

In addition, the cover bottom 35 is configured by bending one edge corresponding to the opened one edge of the support main 27 in a substantially "c" shape, which will be described in more detail with reference to FIG. 2. .

2 is a cross-sectional view schematically showing the cross section of FIG.

As shown, the light emitting diode assembly 29 is formed on one side of the light guide plate 23, the light guide plate 23, and at least one optical sheet 21 on the light guide plate 23. The support main 27 which is stacked, supports the liquid crystal panel 11, and the cover bottom 35 is coupled to the rear surface thereof, and the top cover 13 which borders the edge of the liquid crystal panel 11 includes the support main 27. It is coupled to the cover bottom (35).

Looking at the cover bottom 35 in more detail, the cover bottom 35 corresponds to the first surface of the plate shape in close contact with the back surface of the support main 27 and the one open edge of the support main 27 And a second surface formed by bending one edge of the first surface vertically upward, and a bent portion formed by a third surface perpendicular to the second surface and parallel to the first surface.

In this case, the third surface is bent to the inside of the cover bottom 35, the bent portion is configured such that the shape of the cross-section so that the inner surface toward the light guide plate 23 is formed of approximately "c" shape. Therefore, the light emitting diode assembly 29 is mounted along the inner longitudinal direction of the bent portion, so that the light emitted from the light emitting diode assembly 29 is concentrated in the support main 27.

In addition, a portion of the upper surface of the light guide plate 23 seated on the cover bottom 35 is covered by the third surface of the cover bottom 35 that is bent.

This is for concentrating the light emitted from the light emitting diode assembly 29 into the light guide plate 23, but part of the upper surface of the light guide plate 23 is covered to make the light of uniform brightness into the liquid crystal panel 11. There is a problem that is difficult to enter.

In addition, in order to form the light emitting diode assembly 29 and the light guide plate 23 on the cover bottom 35, the light emitting diode assembly 29 and the light guide plate 23 are forcibly pressed in the bent portion of the cover bottom 35. Since it must be assembled by inserting, this brings about friction, such as damage and abrasion of the light emitting diode assembly 29 and the light guide plate 23, thereby generating a foreign material, such as a drive circuit (refer to FIG. 1). 17) or foreign matter penetrates into the liquid crystal panel 11, and the quality of the liquid crystal display device is degraded frequently.

In addition, since such a process requires careful attention, an unnecessary amount of time and effort is spent in the assembling process of the liquid crystal display module, which also brings about a problem that the efficiency and productivity of the process are lowered.

The present invention is to solve the above problems, the first object is to minimize the wear and damage of the light emitting diode assembly and the light guide plate.

In addition, the second object is to have uniform luminance, and the third object is to improve the efficiency and productivity of the process.

In order to achieve the object as described above, the present invention and the main frame of the rectangular frame; A light emitting diode assembly arranged along a longitudinal direction of one edge of the support main; A backlight unit further comprising a reflector plate sequentially seated on the support main, a light guide plate seated on the reflector plate, and an optical sheet seated on the light guide plate and having a reflective sheet on a rear surface thereof; A liquid crystal panel mounted on the backlight unit; A cover bottom comprising a first surface configured to be in close contact with the back surface of the support main and a second surface of which four edges of the first surface are bent upwardly; It provides an LCD module including a top cover bordering the edge of the liquid crystal panel and assembled to the support main and the cover bottom.

The reflective sheet is located on the upper portion of the light emitting diode assembly, the optical sheet is characterized in that it comprises a diffusion sheet, a prism sheet and the like.

In addition, the support main is characterized in that the one edge is opened, the light emitting diode assembly further comprises a light emitting diode mounted on a printed circuit board, and a light emitting diode printed circuit board mounted with a control unit for controlling light emission. Characterized in that.

The light guide plate may be fixed by the support main, and the support main may further include a jaw protruding from the side to fix the light guide plate.

The light guide plate may further include a protrusion to be fixed to the support main, and further comprising an adhesive tape for fixing between the support main and the light guide plate.

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

3 and 4 are exploded perspective and exploded perspective views of the liquid crystal display module according to the present invention.

As shown in the drawing, the backlight unit 120 and the liquid crystal panel 111 are framed with a rectangular frame-shaped support main 127 having one edge open, and the support main 127 is prevented to prevent deformation of the support main 127. The cover bottom 135 is coupled along the back of the 127.

A printed circuit board 117 connected through a flexible printed circuit board 115 is connected along at least one side of the liquid crystal panel 111, and the backlight unit 120 supports. A light emitting diode assembly 129 formed along the longitudinal direction of the main 127, a white or silver reflecting plate 125 interposed on an upper surface of the support main 127, and a light guide plate mounted on the reflecting plate 125 ( 123, and a plurality of optical sheets 121 including a diffusion sheet and a prism sheet covering the same, the light emitted from the light emitting diode assembly 129 is formed by the reflective plate 125 and the light guide plate 123. After being refracted in the 111 direction, it is processed to have a uniform brightness while passing through the plurality of optical sheets 121 and irradiated to the liquid crystal panel 111.

Then, the top cover 113, which borders the edge of the liquid crystal panel 111, is assembled to the support main 127 and the cover bottom 135 so as to fix all of them.

The light emitting diode assembly 129 includes a light emitting diode mounted on a printed circuit board and a flexible printed circuit board connected to a light emitting diode printed circuit board mounted with a control unit for controlling light emission.

The above-described configuration is similar to a general liquid crystal display module, but the present invention is configured by bending the edges of four directions of the cover bottom 135 in an approximately " b " shape, and also selecting one of the optical sheets 121. The reflective sheet is attached to a portion of the rear surface of the sheet.

This will be described in more detail with reference to FIG. 5.

FIG. 5 is a schematic cross-sectional view taken along the line VV of FIG. 3.

As shown, a light emitting diode assembly 129 is formed on one side of the light guide plate 123, the light guide plate 123, and the light guide plate 123, and a plurality of light guide plates 123 including a diffusion sheet and a prism sheet. The optical sheets 121 are stacked, the support main 127 supporting the liquid crystal panel 111 and the cover bottom 135 are coupled to the rear surface thereof, and the top cover 113 bordering the edge of the liquid crystal panel 111 is provided. It is coupled to the support main 127 and the cover bottom 135.

Looking at the cover bottom 135 in more detail, the cover bottom 135, which is the basis for assembling the entire mechanism of the liquid crystal display device module, has a plate-shaped first surface that is in close contact with the back surface of the support main 127, and in four directions. It consists of a 2nd surface by which the edge was bent upward to predetermined height.

That is, the cover bottom 135 is one plate shape in which four directions are bent in a substantially "b" shape in a cross-sectional shape, and the light emitting diode assembly 129 corresponds to one opened edge of the support main 127. It is mounted along the longitudinal direction on the bent side of the cover bottom 135, so that the light emitted from the light emitting diode assembly 129 is concentrated in the inner direction of the support main 127.

In addition, a reflective sheet 137 is attached to a portion of the rear surface of the selected one of the optical sheets 121 seated on the light guide plate 123, and the reflective sheet 137 is emitted from the light emitting diode assembly 129. This is to concentrate a part of light to the light guide plate 123.

Since the light emitting diode assembly 129 has an emission angle of light of at least 120 to 180 °, the light emitted from the light emitting diode assembly 129 does not enter all of the light guide plate 123, and thus the light emitting diode Since light is distributed to the upper side and the lower side with respect to the assembly 129, by attaching the reflective sheet 137, a part of the light emitted from the light emitting diode assembly 129 and dispersed to the upper side is disposed on the light guide plate 123. You can focus inside.

In this case, a part of the light emitted from the light emitting diode assembly 129 and dispersed to the lower side is the light guide plate 123 with the same effect as the reflective sheet 137 by the cover bottom 135 made of a metal material. You can focus inside.

FIG. 6 is a view schematically illustrating a state in which light F emitted from the light emitting diode assembly 129 is incident into the light guide plate 123. When light F is emitted from 129, the emitted light F is incident into the light guide plate 123 through the light incident part of the light guide plate 123.

The incident light F is spread evenly over a wide area of the light guide plate 123 by propagating the light guide plate 123 by a plurality of total reflections to provide a primary surface light source to the liquid crystal panel 111.

In addition, the light F scattered upward and downward due to the wide exit angle of the light emitting diode assembly 129 is applied to the reflective sheet 137 and the cover bottom 135 attached to the rear surface of the selected one of the optical sheets. The light is reflected by the light guide plate 123 and enters into the light guide plate 123.

In this case, the reflective sheet 137 may be configured on one sheet selected from the rear surface of the plurality of optical sheets 121 seated on the light guide plate 123, and configured on the upper side of the light emitting diode assembly 129. do.

As shown in the drawings and the foregoing description, the cover bottom 135 is formed by bending the cover bottom 135 in a substantially "b" shape according to the present invention so that the light emitting diode assembly 129 is easily formed on the cover bottom 135. The light guide plate 123 seated on the cover bottom 135 can also be easily mounted, rather than an interference fit method when the conventional cover bottom (35 in FIG. 2) is bent and configured in a "c" shape. Can be.

In addition, by attaching the reflective sheet 137 to a portion of the rear surface of the optical sheet 121, a portion of the light emitted from the light emitting diode assembly 129 and dispersed may be concentrated into the light guide plate 123.

In this case, the light guide plate 123 seated on the cover bottom 135 is fixed by the support main 127, which will be described in more detail with reference to FIG. 7.

7 is a schematic cross-sectional view taken along the line VII-VII of FIG. 3.

As already mentioned, the support main 127 is formed of a mold of metal or synthetic resin, and has a substantially rectangular frame shape. As shown, the support main 127 has a predetermined protrusion formed on the side surface of the support main 127. The optical sheet 121 and the light guide plate 123 including the sheet and the prism sheet are guided to prevent the detachment of the optical sheet 121 and the light guide plate 123 through this.

That is, the light guide plate 123 may be supported and fixed by a protrusion configured to partially protrude from the support main 127, and although not shown, a protrusion may be formed in a part of the light guide plate 123 to support the support main ( It may be configured to cover the 127, or can be fixed using an adhesive tape between the end of the support main 127 and the light guide plate 123.

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, the edges of the four directions of the cover bottom are bent in a substantially "b" shape in a cross-sectional shape, whereby the light emitting diode assembly and the light guide plate can be easily configured on the cover bottom, There is an effect to minimize damage to the diode assembly and the light guide plate, and the efficiency and productivity of the process is improved.

In addition, there is an effect that the light of uniform brightness can be incident into the liquid crystal panel, and by attaching a reflective sheet to a portion of the back surface of the selected one of the optical sheet, a part of the light emitted and dispersed in the light emitting diode assembly There is an effect that can be concentrated inside the light guide plate.

Claims (9)

A support frame having a rectangular frame shape; A light emitting diode assembly arranged along a longitudinal direction of one edge of the support main; A backlight unit further comprising a reflector plate sequentially seated on the support main, a light guide plate seated on the reflector plate, and an optical sheet seated on the light guide plate and having a reflective sheet on a rear surface thereof; A liquid crystal panel mounted on the backlight unit; A cover bottom comprising a first surface configured to be in close contact with the back surface of the support main and a second surface of which four edges of the first surface are bent upwardly; The top cover is assembled to the edge of the liquid crystal panel and assembled to the support main and cover bottom Liquid crystal display module comprising a. The method of claim 1, And the reflective sheet is positioned above the light emitting diode assembly. The method of claim 1, The optical sheet includes a diffusion sheet, a prism sheet, and the like. The method of claim 1, The support main module of claim 1, wherein one edge thereof is opened. The method of claim 1, The light emitting diode assembly may further include a light emitting diode mounted on a printed circuit board and a light emitting diode printed circuit board mounted with a control unit for controlling light emission. The method of claim 1, And the light guide plate is fixed by the support main. The method of claim 7, wherein And the support main further includes a jaw protruding from the side to fix the light guide plate. The method of claim 7, wherein The light guide plate further comprises a protrusion for fixing with the support main. The method of claim 7, wherein Liquid crystal display module further comprises an adhesive tape for fixing between the support main and the light guide plate.

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