TWI396894B - Liquid crystal display device - Google Patents

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device.

In recent years, liquid crystal display devices have gradually occupied the mainstream of display products due to their advantages of thin size, small footprint, and low radiation, and are commonly used in displays of ultra-thin televisions, display screens of notebook computers, and the like. The liquid crystal display device generally includes a liquid crystal display module and front and rear housings for housing the liquid crystal display module. The inside of the front and rear housings protects the liquid crystal display module, and the exterior adds a decorative effect to the aesthetics of the product.

Please refer to FIG. 1, which is a perspective exploded view of a conventional liquid crystal display device. The liquid crystal display device 1 includes a front case 3, a rear case 5, and a liquid crystal display module 7. The front case 3 and the rear case 5 accommodate the liquid crystal display module 7.

The liquid crystal display module 7 includes a front iron frame 11, a liquid crystal panel 12, a plastic frame 13, a laminated optical film 15, a light guide plate 16, a reflection sheet 17, a light source 14 disposed on the side of the light guide plate, and a rear light source. Iron frame 19. The side wall of the plastic frame 13 extends inwardly with a hollow extending portion 103. The extending portion 103 spaces the inside of the plastic frame 13 into two spaces, one space accommodates the liquid crystal panel 12, and the other space accommodates the laminated optical film. 15. The light guide plate 16, the reflection sheet 17, and the light source 14 disposed on the side of the light guide plate 16, the rear iron frame 19 and the plastic frame 13 are engaged to receive the optical film 15, the light guide plate 16, the reflection sheet 17, and the light source 14. . The front iron frame 11 and the plastic frame 13 are engaged with each other to accommodate the liquid crystal panel 12 . The front case 3 and the rear case 5 accommodate the liquid crystal display module 7 together.

As can be seen from the above, the liquid crystal display device 1 uses a large number of housing and holding components. For example, the plastic frame 13 and the rear iron frame 19 cause the thickness of the liquid crystal display device 1 to be thick, which cannot meet the demand for lightness and thinning of electronic products by users in recent years. The trend of thin and light liquid crystal display devices is also imminent.

In view of this, the present invention provides a thin and light liquid crystal display device that satisfies the consumer's demand for lighter and thinner products.

The invention provides a liquid crystal display device comprising a front shell, a rear shell and a liquid crystal display module. The liquid crystal display module includes a liquid crystal panel and a backlight module. The rear case includes a bottom plate and a side wall structure integrally formed and vertically connected to the bottom plate. The side wall structure and the bottom plate define an opening space for receiving the liquid crystal panel and the backlight module. An extension portion is supported in the space, and the extension portion supports the edge of the liquid crystal panel. The backlight module is directly located on the bottom plate, and the front case and the rear case together accommodate the liquid crystal display module.

The liquid crystal display device of the present invention replaces the rear iron frame and the plastic frame by providing a sidewall structure and an extension portion on the bottom plate of the rear case, thereby effectively reducing the number of components of the liquid crystal display device and reducing the original function. The raw materials and manufacturing costs reduce the weight of the product and reduce the thinness and volume of the product.

2 is a perspective exploded view of a first embodiment of a liquid crystal display device of the present invention. The liquid crystal display device 2 includes a front case 40, a rear case 80 and a liquid crystal display module 20. The front case 40 is engaged with the rear case 80 or screwed to form a receiving space (not shown) for receiving the liquid crystal display module 20.

The rear case 80 includes a bottom plate 84 and a side wall structure (not shown) perpendicularly connected to the bottom plate 84. The side wall structure is composed of four side walls 82 connected end to end. The closed four side walls 82 cooperate with the bottom plate 84 to define a generally rectangular space (not labeled) having an opening. The volume of the space is substantially the same as the volume of the liquid crystal display module 20. The side wall 82 extends an extension 83 into the semi-closed space at a distance from the bottom plate 84. The extension 83 is perpendicular to the side wall 82 and has a "back" shape. If the size of the liquid crystal display device 2 is large, the bottom plate 84 may be a metal member. The material of the side wall 82 may be plastic, and the side wall 82 and the bottom plate 84 may be integrated into a single body by in-mold forming technology. If the size of the liquid crystal display device 2 is small, both the bottom plate 84 and the side wall 82 may be plastic members.

The liquid crystal display module 20 includes a light shielding tape 29 , a liquid crystal panel 21 , and a backlight module 23 . The backlight module 23 includes a plurality of optical films 24 , a light guide plate 26 , a strip-shaped light tube 25 , and a reflective sheet 27 . The thickness of the light guide plate 26 and the reflection sheet 27 is substantially the same as the distance from the extension portion 83 to the bottom plate 84. The thickness of the optical film 24 is slightly smaller than the thickness of the extension portion 83. The light guide plate 26 includes a light incident surface 261, a light exit surface 263 adjacent to the light incident surface 261, and a bottom surface 265 opposite to the light exit surface 263.

Please refer to FIG. 3 and FIG. 4 together. FIG. 3 is a partial assembly view of the liquid crystal display device 2 shown in FIG. 2, and FIG. 4 is a cross-sectional view along line IV-IV of FIG. The external force is applied to elastically deform the four side walls 82, and the space is slightly increased. Therefore, even if the extension portion 83 is blocked, the reflection sheet 27, the light guide plate 26, and the strip lamp tube 25 can be assembled inside the extension portion 83. . The reflective sheet 27 is disposed on the bottom plate 84. The bottom surface 263 of the light guide plate 26 is disposed adjacent to the reflective sheet 27. The strip light tube 25 is disposed on the light incident surface 261 side of the light guide plate 26, and the optical film 24 is disposed. On the light-emitting surface 263 side of the light guide plate 26, and the edge of the optical film 24 is in contact with the edge of the extending portion 83, the liquid crystal panel 21 is disposed outside the extending portion 83, and the bottom portion thereof is supported by the extending portion 83. The light-shielding tape 29 is attached to the top of the side wall 82 and the edge of the liquid crystal panel 21 to fix the liquid crystal panel 21. The front case 40 and the rear case 80 together receive and fix the liquid crystal display module 20, and the light shielding tape 29 is adjacent to the front case 40.

Compared with the prior art, the present invention omits the front iron frame by using a light-shielding tape instead of fixing the liquid crystal panel, and adopting the sidewall structure on the rear shell to replace the rear iron frame and the plastic frame, while ensuring the original function is unchanged. The utility model effectively reduces the number of components of the liquid crystal display device, reduces raw materials and manufacturing costs, reduces product weight, and reduces product thinness and volume.

Please refer to FIG. 5, which is a perspective exploded view of a second embodiment of the liquid crystal display device of the present invention. The second embodiment of the present invention is basically the same as the first embodiment, except that one side of the light guide plate 36 of the liquid crystal display device 3 has a plurality of convex first card corners 367, and one side of the optical film 34 has a plurality of a protruding second card corner 347, the extending portion 383 of the rear case 380 has a plurality of notches 387 corresponding to the first card angle 367 of the light guide plate 36 and the second card angle 347 of the optical film 34. The plurality of first corners 367 of the light guide plate 36 allow the light guide plate 36 to enter, and the plurality of notches 387 receive the second card corner 347 of the optical film 34, and the card angle is accommodated. The positioning of the optical film 34 in combination prevents the light guide plate 36 from being assembled incorrectly.

In another embodiment of the present invention, for example, a reflective layer is disposed on the side wall of the semi-closed side and the inner side of the bottom plate, thereby omitting the reflective sheet, and the bottom wall extends into the bottom of the space. The top of the bottom supports the liquid crystal panel, and the bottom of the bottom is connected to the inner side of the bottom plate. At this time, the space is slightly smaller, and the volume of the light guide plate is also slightly smaller, and the thickness of the light guide plate is substantially the same as the distance from the extension portion to the bottom plate. The base has a square hole, and the size of the hole corresponds to the first card angle of the light guide plate and the second card angle of the optical film. During assembly, the side wall can receive the light guide plate without deformation, and the defect hole accommodates the first card angle of the light guide plate and the second card angle of the optical film. For another example, the extending portion may be two extending strips extending in the middle of the side wall, and the positions of the two extending strips may be oppositely disposed or adjacently disposed. The extension may be three "ㄇ" shaped extension strips extending in the middle of the side wall. In addition, the four side walls may be connected to each other without head and tail. The liquid crystal panel can be tempered glass to increase the strength and prevent damage due to the absence of the front iron frame.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

Liquid crystal display device: 2, 3

Front shell: 40

Back shell: 80, 380

LCD module: 20

Base plate: 84

Side wall: 82

Extension: 83, 383

Shading tape: 29

LCD panel: 21

Backlight module: 23

Optical diaphragm: 24, 34

Light guide plate: 26, 36

Strip tube: 25

Reflector: 27

Glowing surface: 261

Glossy: 263

Bottom surface: 265

First card angle: 367

Second card angle: 347

Gap: 387

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

Fig. 2 is an exploded perspective view showing the first embodiment of the liquid crystal display device of the present invention.

3 is a partial assembly view of the liquid crystal display device shown in FIG. 2.

Figure 4 is a schematic cross-sectional view along line IV-IV of Figure 3.

Fig. 5 is an exploded perspective view showing a second embodiment of the liquid crystal display device of the present invention.

2‧‧‧Liquid crystal display device

40‧‧‧ front shell

80‧‧‧back shell

20‧‧‧LCD module

84‧‧‧floor

82‧‧‧ side wall

83‧‧‧Extension

29‧‧‧Lighting tape

21‧‧‧LCD panel

23‧‧‧Backlight module

24‧‧‧Optical diaphragm

26‧‧‧Light guide plate

25‧‧‧Large tube

27‧‧‧reflector

261‧‧‧Into the glossy surface

263‧‧‧Glossy surface

265‧‧‧ bottom

Claims (13)

A liquid crystal display device includes a front case, a rear case, and a liquid crystal display module. The liquid crystal display module includes a liquid crystal panel and a backlight module. The back cover includes a bottom plate and a bottom plate and a bottom plate. a vertically-connected sidewall structure, the sidewall structure and the bottom plate defining an opening space for receiving the liquid crystal panel and the backlight module, the sidewall structure extending an extension into the space, the extension supporting the liquid crystal panel The backlight module is directly located on the bottom plate, and the front case and the rear case together accommodate the liquid crystal display module. The liquid crystal display device of claim 1, wherein the extending portion extends perpendicular to the sidewall, the backlight module includes a plurality of optical films, a light guide plate, a light source and a reflective sheet, and the light guide plate The thickness of the reflective sheet is substantially the same as the distance from the extension to the bottom plate. The liquid crystal display device of claim 1, wherein the semi-closed side wall and the inner side of the bottom plate are provided with a reflective layer. The liquid crystal display device of claim 3, wherein the backlight module comprises a plurality of optical films and a light guide plate, the thickness of the light guide plate being substantially the same as the distance from the extension to the bottom plate. The liquid crystal display device of claim 1, wherein the light guide plate has a first card angle, the optical film has a second card angle, and the side wall extends a bottom platform into the space, the bottom plate The top supports the liquid crystal panel, and the bottom of the bottom is connected to the inner side of the bottom plate. The bottom has a square hole, and the hole accommodates the first card angle of the light guide plate and the second card angle of the optical film. The liquid crystal display device of claim 1, wherein the bottom plate is a metal member, and the side wall is a plastic member. The liquid crystal display device of claim 1, wherein the sidewall structure comprises four sidewalls, and the four sidewalls may be one of an end-to-end connection and an end-to-end unconnected structure. The liquid crystal display device of claim 1, wherein the liquid crystal display device further comprises a light-shielding tape attached to an edge of the sidewall and an edge of the liquid crystal panel, the light-shielding tape being adjacent to the front shell. The liquid crystal display device of claim 1, wherein the extending portion may be one of two, three or four extending from the side wall. The liquid crystal display device of claim 9, wherein the extending portion may be two oppositely extending strips extending in the middle of the side wall. The liquid crystal display device of claim 9, wherein the extending portion may be two adjacent extending strips extending in the middle of the side wall. The liquid crystal display device of claim 9, wherein the extending portion is three "ㄇ"-shaped extending strips extending in the middle of the side wall. The liquid crystal display device of claim 1, wherein the side of the optical film has a plurality of protruding card corners, and the extending portion of the rear case has a plurality of notches corresponding to the third card angle of the optical film. a plurality of third card corners for receiving the optical film.