KR20040046418A - Liquid crystal display - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) is provided to prevent an insertion phenomenon of a case top when assembling the LCD. CONSTITUTION: The LCD comprises a support main(34), a backlight unit and a liquid crystal panel(26) stacked at the inside of the support main(34), a cover bottom(36) for covering with a bottom surface and a side surface of the support main(34) and a case top(22) for fixing the support main(34) and the liquid crystal panel(26). The support main(34) is made of a mold material and a side wall surface of its inside is formed as a step-type surface. A backlight unit including a reflective sheet(32), a light guide panel(30), optical sheets(28) and a lamp housing is mounted to the bottom layer of the support main(34). The liquid crystal panels(26) on which polarizing sheets(24a,24b) are attached, respectively, are stacked on the backlight unit.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing the jamming of the case top when the liquid crystal display device is coupled.

A typical liquid crystal display device includes a liquid crystal display module, a driving circuit unit for driving the liquid crystal display module, and a case installed to surround the liquid crystal display module.

The liquid crystal display module includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, and a back light unit for irradiating light to the liquid crystal panel. In addition, in the liquid crystal display module, optical sheets for vertically raising light traveling from the backlight unit toward the liquid crystal panel are arranged.

The liquid crystal panel, the backlight unit and the light sheet should be fastened in an integrated form to prevent light loss and protected from damage by external impact. To this end, a case for a liquid crystal display device formed to surround a backlight unit and an optical sheet including an edge of the liquid crystal panel is provided.

1 and 2 are a perspective view and a cross-sectional view showing a conventional liquid crystal display device.

1 and 2, a conventional liquid crystal display device includes a support main 14, a backlight unit and a liquid crystal panel 6 stacked inside the support main 14, and one side of the support main 14. A cover bottom 16 surrounding the bottom and side surfaces, and a case top 2 for fixing the support main 14 and the liquid crystal panel 6 are provided.

The support main 14 is a mold, and the inner side wall surface is formed into a stepped stepped surface. The innermost layer of the support main 14 is equipped with a backlight unit including a reflective sheet 12, a light guide plate 10, an optical sheet 8 and a lamp housing not shown, and a polarizing sheet 4a, 4b thereon. The liquid crystal panel 6 to which each is attached is laminated | stacked. The lamp housing is not shown in the lamp housing, and is fastened to the support main 14 by screws.

The reflective sheet 12 guides the light from the backlight unit toward the liquid crystal panel 6. The optical sheets 8 cause light incident obliquely from the surface of the reflective sheet 12 to travel vertically toward the liquid crystal panel 6. In other words, the optical sheets 8 serve to raise the light propagation direction from the surface of the optical sheets 8. The polarizing sheets 4a and 4b expand the viewing angle of the image displayed by the liquid crystal cell matrix.

The liquid crystal panel 6 includes liquid crystal cells arranged in a matrix form between the upper and lower glass substrates. Each liquid crystal cell is provided with a thin film transistor for switching a video signal. Such liquid crystal cells display an image corresponding to the video signal by changing the refractive index of the liquid crystal cell according to the video signal. On the other hand, a tape carrier package (not shown) in which a drive integrated circuit for applying a driving signal to the thin film transistor is mounted on the lower substrate of the liquid crystal panel 6 is attached.

The cover bottom 16 is installed to surround the bottom and side of one side of the support main 14. Screw holes are formed in the side portion of the cover bottom 16 such that a screw (not shown) can pass therethrough. The case top 2 is installed to surround the upper and side surfaces of the support main 14 to fix the support main 14 and the liquid crystal panel 6. At this time, the case top 2 is installed to surround the cover bottom 16 on the side of the support main 14.

However, when the case top 2 is mounted in the LCD, the case top 2 is inserted into the space 18 between the support main 14 and the cover bottom 16 as shown in FIGS. 3 and 4. There is a disadvantage in that workability is reduced due to the jamming phenomenon.

In detail, the cover bottom 16 is formed in a “b” shape to surround the side and bottom of the support main 14. As such, when the cover bottom 16 is coupled to the support main 14, a predetermined space 18 is generated between the side surface of the support main 14 and the cover bottom 16.

Therefore, when the case top 2 is installed, a jamming phenomenon occurs in which the case top 2 is inserted into the space 18 between the support main 14 and the cover bottom 16. (2) A lot of time is consumed in the fastening process.

Accordingly, it is an object of the present invention to provide a liquid crystal display device capable of preventing the jamming of the case top when the liquid crystal display device is combined.

1 is an exploded perspective view showing a conventional liquid crystal display device.

FIG. 2 is a cross-sectional view of the liquid crystal display shown in FIG. 1 cut in a line A-A 'showing a state in which a liquid crystal display device is mounted on a cover case of a notebook personal computer or the like. FIG.

3 and 4 are a cross-sectional view and a perspective view showing a jamming phenomenon of the case top shown in FIG.

5 is a cross-sectional view showing a liquid crystal display device according to a first embodiment of the present invention.

6 and 7 are a cross-sectional view and a perspective view showing a process of preventing the pinch of the case top by the cover bottom shown in FIG.

8 is a view showing the length of the cover bottom protrusion shown in FIG.

9 is a cross-sectional view showing a liquid crystal display device according to a second embodiment of the present invention.

10 is a view showing the length of the cover bottom projection shown in FIG.

11 is a cross-sectional view showing a liquid crystal display device according to a third embodiment of the present invention.

12 is a cross-sectional view showing a liquid crystal display device according to a fourth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

2,22,56,64,74: case top 4a, 4b, 24a, 24b: polarizing sheet

6,26: liquid crystal panel 8,28: optical sheet

10,30: light guide plate 12,32: reflective sheet

14,34,52,60,70: Support main 16,36,50,62,72: Cover bottom

18,38,66,76: space 42,54,68,78: protrusion

In order to achieve the above object, the liquid crystal display device of the present invention includes a support main having a back light unit installed on the lower side and a liquid crystal panel installed on the upper side, a cover bottom installed to cover the side and the bottom of the support main, A case top is provided to surround the edge and the side surface of the support main, and a protrusion extending from one end of the cover bottom.

One end of the cover bottom from which the protrusion is extended is positioned above the support main.

The protrusion is formed extending from the one end of the cover bottom toward the support main.

A predetermined space is located between the support main and the cover bottom, and the protrusion is formed to overlap the predetermined space.

The length of the protrusion is set to 0.05 mm or more.

The protrusion is formed to overlap the support main.

The length of the protrusion is set between 0.2 mm and 2 mm.

The length of the protrusion is set to 1 mm.

The length of the protrusion is set so that the support main and the protrusion can overlap by 0.1 mm or more.

The liquid crystal display of the present invention includes a support main having a back light unit installed on the lower side and a liquid crystal panel installed on the upper side, a cover bottom installed to cover the side and bottom of the support main, and an edge of the liquid crystal panel and the side of the support main It is provided with a case top installed so as to surround the protrusion and a protrusion extending from the upper side of the support main.

The protrusion extends from the support main toward the cover bottom.

A predetermined space is located between the support main and the cover bottom, and the protrusion is formed to overlap the predetermined space.

The length of the protrusion is set to 0.05 mm or more.

The protrusion is formed to overlap the cover bottom.

The length of the protrusion is set between 0.2 mm and 2 mm.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 to 12.

5 is a cross-sectional view illustrating a liquid crystal display device according to a first embodiment of the present invention.

Referring to FIG. 5, the liquid crystal display according to the first exemplary embodiment of the present invention includes a support main 34, a backlight unit and a liquid crystal panel 26 stacked inside the support main 34, and a support main 34. Cover bottom (36) surrounding the bottom and side of one side of the () and a case top 22 for fixing the support main 34 and the liquid crystal panel 26.

The support main 34 is a mold, and the inner side wall surface is formed into a stepped stepped surface. The innermost layer of the support main 34 is equipped with a backlight unit including a reflective sheet 32, a light guide plate 30, an optical sheet 28 and a lamp housing (not shown), on which the polarizing sheets 24a and 24b are mounted. The liquid crystal panel 26 to which each is attached is laminated | stacked. The lamp housing is not shown, and a lamp is built in and fixed to the support main 34 by screws.

The reflective sheet 32 guides the light from the backlight unit toward the liquid crystal panel 26. The light guide plate 30 allows the light from the backlight unit to be evenly illuminated on the liquid crystal panel 26. The optical sheets 28 cause the light incident obliquely from the surface of the reflective sheet 32 to travel vertically toward the liquid crystal panel 26. In other words, the optical sheets 28 serve to raise the light propagation direction from the surface of the optical sheets 28. The polarizing sheets 24a and 24b extend the viewing angle of the image displayed by the liquid crystal cell matrix.

The liquid crystal panel 26 includes liquid crystal cells arranged in a matrix between upper and lower glass substrates. Each liquid crystal cell is provided with a thin film transistor for switching a video signal. Such liquid crystal cells display an image corresponding to the video signal by changing the refractive index of the liquid crystal cell according to the video signal. On the other hand, a tape carrier package (not shown) in which a drive integrated circuit for applying a driving signal to the thin film transistor is mounted on the lower substrate of the liquid crystal panel 26 is attached.

The cover bottom 36 is installed to surround the bottom and side surfaces of one side of the support main 34. Screw holes are formed in the side portion of the cover bottom 36 such that a screw (not shown) can pass therethrough. The case top 22 is installed to surround the upper and side surfaces of the support main 34 to fix the support main 34 and the liquid crystal panel 26. At this time, the case top 22 is installed to surround the cover bottom 36 on the side of the support main 34.

On the other hand, in the first embodiment of the present invention, the protrusion 42 extends from one end of the cover bottom 36 positioned above the support main 34. In other words, the protrusion 42 extends from one end of the cover bottom 36 so as to overlap the space 38 between the support main 34 and the cover bottom 36. The protrusion 42 prevents the case top 22 from being inserted into the space 38 between the support main 34 and the cover bottom 36 when the case top 22 is fastened. That is, the protrusion 42 shortens the fastening time of the case top 22 by preventing the case top 22 from being caught.

In detail, the cover bottom 36 is installed to surround the side and bottom of the support main 34. In addition, the protrusion 42 extending from one end of the cover bottom 36 is generated between the side of the support main 34 and the cover bottom 36 when the cover bottom 36 is engaged with the support main 34. It is formed to overlap the predetermined space 38. As such, when the protrusion 42 extending from the cover bottom 36 overlaps the predetermined space 38, the case top 22 is predetermined when the case top 22 is fastened as shown in FIGS. 6 and 7. Can be prevented from being inserted into the space 38. That is, in the first embodiment of the present invention, it is possible to prevent the jamming of the case top 22 by the protrusion 42, thereby shortening the process time.

Meanwhile, in the present invention, the length of the protrusion 42 is set to 0.05 mm or more as shown in FIG. 8 so that the case top 22 is not inserted into the predetermined space 38. As such, when the protrusion 42 is formed to be 0.05 mm or more, the case top 22 can be prevented from being inserted into the predetermined space 38.

9 is a cross-sectional view illustrating a liquid crystal display device according to a second embodiment of the present invention.

In FIG. 9, components having the same functions and shapes as those in FIG. 5 are assigned the same reference numerals.

9, the liquid crystal display according to the second exemplary embodiment of the present invention includes a support main 52, a backlight unit and a liquid crystal panel 26 stacked inside the support main 52, and a support main 52. Cover bottom (50) surrounding the bottom and side of one side of the () and a case top 56 for fixing the support main 52 and the liquid crystal panel 26.

The support main 52 is a mold, and the inner side wall surface is formed into a stepped stepped surface. The innermost layer of the support main 52 is equipped with a backlight unit including a reflective sheet 32, a light guide plate 30, an optical sheet 28 and a lamp housing (not shown), on which the polarizing sheets 24a and 24b are mounted. The liquid crystal panel 26 to which each is attached is laminated | stacked. The lamp housing is not shown, and a lamp is built in and fastened to the support main 52 by screws.

The reflective sheet 32 guides the light from the backlight unit toward the liquid crystal panel 26. The light guide plate 30 allows the light from the backlight unit to be evenly illuminated on the liquid crystal panel 26. The optical sheets 28 cause the light incident obliquely from the surface of the reflective sheet 32 to travel vertically toward the liquid crystal panel 26. In other words, the optical sheets 28 serve to raise the light propagation direction from the surface of the optical sheets 28. The polarizing sheets 24a and 24b extend the viewing angle of the image displayed by the liquid crystal cell matrix.

The liquid crystal panel 26 includes liquid crystal cells arranged in a matrix between upper and lower glass substrates. Each liquid crystal cell is provided with a thin film transistor for switching a video signal. Such liquid crystal cells display an image corresponding to the video signal by changing the refractive index of the liquid crystal cell according to the video signal. On the other hand, a tape carrier package (not shown) in which a drive integrated circuit for applying a driving signal to the thin film transistor is mounted on the lower substrate of the liquid crystal panel 26 is attached.

The cover bottom 50 is installed to surround the bottom and side surfaces of one side of the support main 52. Screw holes are formed in the side portion of the cover bottom 50 such that a screw (not shown) can pass therethrough. The case top 56 is installed to surround the upper and side surfaces of the support main 52 to fix the support main 52 and the liquid crystal panel 26. At this time, the case top 56 is installed to surround the cover bottom 50 at the side of the support main 52.

On the other hand, in the second embodiment of the present invention, the protrusion 54 is extended from one end of the cover bottom 50 positioned above the support main 52. The protrusion 54 extends from one end of the cover bottom 50 so as to overlap the upper side of the support main 52. The protrusion 54 prevents the case top 56 from being inserted into the space 38 between the support main 52 and the cover bottom 50 when the case top 56 is fastened. That is, the protrusion 54 shortens the fastening time of the case top 56 by preventing the case top 56 from being pinched.

In detail, the cover bottom 50 is installed to surround the side and bottom of the support main 52. In addition, the protrusion 54 extending from one end of the cover bottom 50 is formed to overlap the upper side of the support main 52. As such, when the protrusion 54 extending from the cover bottom 50 overlaps with the support main 52 (that is, the protrusion 54 is formed to cover the predetermined space 38), the case top ( 56 The case top 56 can be prevented from being inserted into the predetermined space 38 at the time of fastening. That is, in the second embodiment of the present invention, it is possible to prevent the jamming of the case top 56 by the protrusion 54, thereby shortening the process time.

On the other hand, in the present invention, the protrusion 54 is formed to a length of 0.2mm to 2mm, preferably 1mm as shown in FIG. In addition, the length of the protrusion 54 is set so that the overlap length with the support main 52 can be at least 0.1 mm or more.

11 is a cross-sectional view illustrating a liquid crystal display device according to a third embodiment of the present invention.

In FIG. 11, components having the same functions and shapes as those in FIG. 5 are assigned the same reference numerals.

Referring to FIG. 11, the liquid crystal display according to the third exemplary embodiment of the present invention includes a support main 60, a backlight unit and a liquid crystal panel 26 stacked inside the support main 60, and a support main 60. Cover bottom (62) surrounding the bottom and side of one side of the (), and a case top 64 for fixing the support main 60 and the liquid crystal panel 26.

The support main 60 is a mold, and the inner side wall surface is formed into a stepped stepped surface. The innermost layer of the support main 60 is equipped with a backlight unit including a reflective sheet 32, a light guide plate 30, an optical sheet 28 and a lamp housing not shown, and a polarizing sheet 24a, 24b thereon. The liquid crystal panel 26 to which each is attached is laminated | stacked. Not shown lamp is built in the lamp housing, is fixed to the support main 60 by screwing.

The reflective sheet 32 guides the light from the backlight unit toward the liquid crystal panel 26. The light guide plate 30 allows the light from the backlight unit to be evenly illuminated on the liquid crystal panel 26. The optical sheets 28 cause the light incident obliquely from the surface of the reflective sheet 32 to travel vertically toward the liquid crystal panel 26. In other words, the optical sheets 28 serve to raise the light propagation direction from the surface of the optical sheets 28. The polarizing sheets 24a and 24b extend the viewing angle of the image displayed by the liquid crystal cell matrix.

The liquid crystal panel 26 includes liquid crystal cells arranged in a matrix between upper and lower glass substrates. Each liquid crystal cell is provided with a thin film transistor for switching a video signal. Such liquid crystal cells display an image corresponding to the video signal by changing the refractive index of the liquid crystal cell according to the video signal. On the other hand, a tape carrier package (not shown) in which a drive integrated circuit for applying a driving signal to the thin film transistor is mounted on the lower substrate of the liquid crystal panel 26 is attached.

The cover bottom 62 is installed to surround the bottom and side surfaces of one side of the support main 60. Screw holes are formed in the side portion of the cover bottom 62 so that a screw (not shown) can pass therethrough. The case top 64 is installed to surround the upper and side surfaces of the support main 60 to fix the support main 60 and the liquid crystal panel 26. At this time, the case top 64 is installed to surround the cover bottom 62 on the side of the support main 60.

On the other hand, in the third embodiment of the present invention, the protrusion 68 extends from the one end of the upper side of the support main 60 toward the cover bottom 62. In other words, the protrusion 68 extends to overlap the space 66 between the cover bottom 62 and the support main 60. The protrusion 68 prevents the case top 64 from being inserted into the space 66 between the support main 60 and the cover bottom 62 when the case top 64 is fastened. That is, in the third embodiment of the present invention, the jamming of the case top 64 may be prevented by the protrusion 68, and thus the processing time may be shortened. In the present invention, the length of the lead portion 68 is set to 0.05 mm or more so that the case top 64 is not inserted into the predetermined space 66.

12 is a cross-sectional view illustrating a liquid crystal display device according to a fourth embodiment of the present invention.

In FIG. 12, components having the same functions and shapes as those in FIG. 5 are assigned the same reference numerals.

Referring to FIG. 12, the liquid crystal display according to the fourth exemplary embodiment of the present invention includes a support main 70, a backlight unit and a liquid crystal panel 26 stacked inside the support main 70, and a support main 70. Cover bottom (72) surrounding the bottom and side of one side of the (), and the case top 74 for fixing the support main 70 and the liquid crystal panel 26.

The support main 70 is a mold, and the inner side wall surface is formed into a stepped stepped surface. The innermost layer of the support main 70 is equipped with a backlight unit including a reflective sheet 32, a light guide plate 30, an optical sheet 28 and a lamp housing not shown, and a polarizing sheet 24a, 24b thereon. The liquid crystal panel 26 to which each is attached is laminated | stacked. Not shown lamp is built in the lamp housing, is fastened to the support main 70 by screws.

The reflective sheet 32 guides the light from the backlight unit toward the liquid crystal panel 26. The light guide plate 30 allows the light from the backlight unit to be evenly illuminated on the liquid crystal panel 26. The optical sheets 28 cause the light incident obliquely from the surface of the reflective sheet 32 to travel vertically toward the liquid crystal panel 26. In other words, the optical sheets 28 serve to raise the light propagation direction from the surface of the optical sheets 28. The polarizing sheets 24a and 24b extend the viewing angle of the image displayed by the liquid crystal cell matrix.

The liquid crystal panel 26 includes liquid crystal cells arranged in a matrix between upper and lower glass substrates. Each liquid crystal cell is provided with a thin film transistor for switching a video signal. Such liquid crystal cells display an image corresponding to the video signal by changing the refractive index of the liquid crystal cell according to the video signal. On the other hand, a tape carrier package (not shown) in which a drive integrated circuit for applying a driving signal to the thin film transistor is mounted on the lower substrate of the liquid crystal panel 26 is attached.

The cover bottom 72 is installed to surround the bottom and side surfaces of one side of the support main 70. Screw holes are formed in the side portion of the cover bottom 72 such that a screw (not shown) can pass therethrough. The case top 74 is installed to surround the upper and side surfaces of the support main 70 to fix the support main 70 and the liquid crystal panel 26. At this time, the case top 74 is installed to surround the cover bottom 72 on the side of the support main 70.

On the other hand, in the fourth embodiment of the present invention, the protrusion 78 is extended so as to overlap the cover bottom 72 from one upper end of the support main 70. Thus, the protrusion 78 overlaps the space 76 between the cover bottom 72 and the support main 70. That is, the protrusion 78 prevents the case top 74 from extending into the space 76 between the support main 70 and the cover bottom 72 when the case top 74 is fastened. Therefore, in the fourth embodiment of the present invention, it is possible to prevent the case top 74 from being caught, thereby shortening the process time. On the other hand, in the present invention, the length of the protrusion 54 is set between 0.2 mm and 2 mm.

As described above, according to the liquid crystal display according to the present invention, it is possible to prevent the case top from being inserted into the space between the cover bottom and the support main by the protrusion extending from either the cover bottom or the support main. In other words, according to the embodiments of the present invention, it is possible to prevent the phenomenon of jamming the case top, thereby shortening the process time.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (15)

Support main with a backlight unit installed on the lower side and a liquid crystal panel installed on the upper side, A cover bottom installed to surround the side and bottom of the support main; A case top installed to surround an edge of the liquid crystal panel and a side surface of the support main; And a protrusion extending from one end of the cover bottom. The method of claim 1, And one end of the cover bottom from which the protrusion is extended is positioned above the support main. The method of claim 2, And the protrusion extends from one end of the cover bottom toward the support main. The method of claim 1, And a predetermined space is located between the support main and the cover bottom, and the protrusion is formed to overlap the predetermined space. The method of claim 4, wherein And the length of the protruding portion is set to 0.05 mm or more. The method of claim 1, And the protrusion is formed to overlap the support main. The method of claim 6, And the length of the protrusion is set between 0.2 mm and 2 mm. The method of claim 7, wherein And a length of the protruding portion is set to 1 mm. The method of claim 6, Wherein the length of the protrusion is set such that the support main and the protrusion overlap at least 0.1 mm. Support main with a backlight unit installed on the lower side and a liquid crystal panel installed on the upper side, A cover bottom installed to surround the side and bottom of the support main; A case top installed to surround an edge of the liquid crystal panel and a side surface of the support main; And a protrusion extending from an upper side of the support main. The method of claim 10, And the protrusion extends from the support main toward the cover bottom. The method of claim 10, And a predetermined space is located between the support main and the cover bottom, and the protrusion is formed to overlap the predetermined space. The method of claim 12, And the length of the protruding portion is set to 0.05 mm or more. The method of claim 10, And the protrusion is formed to overlap the cover bottom. The method of claim 14, And the length of the protrusion is set between 0.2 mm and 2 mm.