TWI383208B - Liquid crystal display device - Google Patents

Description

Liquid crystal display device

The present invention relates to a liquid crystal display device, and more particularly to an assembly structure of a liquid crystal display device.

The development of liquid crystal display devices is faster and more robust than other flat panel displays. In recent years, the models introduced by various manufacturers have a tendency to be larger in size and more rational in price to meet market demand.

Generally, a liquid crystal display device includes a liquid crystal panel and a backlight module. The liquid crystal panel comprises a color filter substrate and a thin film transistor substrate, and a liquid crystal layer is filled between the two substrates. The backlight module provides the light source required for the LCD panel display.

The backlight module can be divided into two types according to the position of the light source: the direct light type and the side light type. The light source position of the latter is set on the side of the backlight module and a light guide plate is disposed to assist the light source to be uniformly emitted. Generally, a large-sized liquid crystal display device uses a direct-lit backlight module.

The first figure discloses a conventional liquid crystal display device 10, which mainly includes a backlight module 11, a liquid crystal panel 19, and an outer frame 18. In the illustration, the backlight module 11 is a direct type backlight module, which includes a back plate 12 and a plurality of light sources 13 disposed on the back plate 12. In addition, a reflective plate 14 may be disposed between the back plate 12 and the light source 13, which may increase the luminous efficiency of the light source 13.

Further, in order to increase the efficiency of the light source 13, a diffusing plate 15 may be disposed above the light source 13. For the optimization of optical characteristics such as brightness, viewing angle, uniformity, etc., an optical film group 16 is usually disposed above the diffusing plate 15.

In addition, a frame 17 (hereinafter referred to as the inner frame 17, which may be made of plastic) is disposed on the optical film set 16. The role of the inner frame 17 in the mechanism is very important. On the one hand, the liquid crystal panel 19 is disposed on the inner edge of the inner frame 17, and then through the combination of the inner frame 17 and the outer frame 18, the liquid crystal panel 19 is fixed to the inner frame 17 and On the other hand, the inner frame 17 is press-fitted on the outer edge of the optical film group 16, and through the combination of the inner frame 17 and the back plate 12, the optical film group 16, the diffusion plate 15, and the like are fixed to Between the inner frame 17 and the back plate 12.

Typically, the backing plate 12 is a metal such as aluminum, steel, or an alloy that meets the requirements of light weight and toughness, and may be formed in one piece. The inner frame 17 is usually made of a plastic material. It is expected that in order to reduce the manufacturing process of the liquid crystal display device, especially for a large-sized liquid crystal display device, the combination of the inner frame 17 and the back plate 12 must be designed in accordance with the following: providing sufficient strength to carry the backlight The components of the module 11 have low manufacturing costs and convenient assembly.

Therefore, there is a need to provide a new liquid crystal display device, the main feature of which is that the mechanism design of the inner frame 17 and the back plate 12 can meet the above requirements, so as to achieve the goal of rationalizing the price of the liquid crystal display device in the case of a large amount of production capacity. .

It is an object of the present invention to provide a new liquid crystal display device, the main feature of which is that the mechanism design of the inner frame and the back plate meets the requirements of sufficient strength, low cost, and fast assembly.

According to the above objective, the present invention provides a liquid crystal display device including an outer frame, a liquid crystal panel, and a backlight module. The backlight module includes a back plate, a plurality of light sources, a diffusion plate, an optical film group, and an inner lens. a frame, the liquid crystal panel is fixed between the inner frame and the outer frame, and the inner frame includes an opening, the opening is provided with a stopper, and the back plate is provided with a bridge at a corresponding position of the block, and the block is combined with the bridge to make each of the backlight modules The component is fixed between the backboard and the inner frame.

In accordance with the above object, the present invention provides another liquid crystal display device having the same structure as that of the liquid crystal display device described above, except that the positions of the bridge and the stopper are interchanged.

According to the above object, the present invention provides another liquid crystal display device having a structure different from the above liquid crystal display device in that the inner frame includes a plurality of frame segments, wherein at least one of the frame segments includes a barb and the back plate is barbed. The corresponding position is provided with a groove, and the barbs are combined with the groove to fix the components of the backlight module between the back plate and the inner frame.

The second to fifth figures disclose a liquid crystal display device according to an embodiment of the present invention, wherein the first figure is an exploded view of the liquid crystal display device, and the other figures show other elements or important features of the liquid crystal display device.

As shown in the second figure, the liquid crystal display device 20 of the embodiment of the present invention includes a backlight module 21, a liquid crystal panel 29, and an outer frame 28. In the embodiment, the liquid crystal display device is a display device having a large size, for example, 47 inches or more, and the backlight module 21 is a direct type backlight module, but is not limited thereto. The backlight module 21 includes a back plate 22, and a plurality of light sources 23, such as cold cathode lamps or light emitting diodes, are disposed on the back plate 22. In addition, a reflective plate 24 may be disposed between the back plate 22 and the light source 23 to increase the luminous efficiency of the light source 23.

In addition, in order to improve the efficiency of the light source 23, a diffusing plate 25 may be disposed above the light source 23; for optimization of optical characteristics such as brightness, viewing angle, uniformity, etc., an optical film group 26 may be disposed above the diffusing plate 25, and optical. The film set 26 may comprise a combination of a diffusion film, a ruthenium film, a brightness enhancement film (BEF), a reflective brightness enhancement film (DBEF), and the like.

In addition, a frame 27 (hereinafter referred to as the inner frame 27, which may be made of plastic) is disposed on the optical film set 26. The inner frame 27 is combined with the outer frame 28 to fix the liquid crystal panel 29 between the inner frame 27 and the outer frame 28. On the other hand, the inner frame 27 is combined with the back plate 22 to fix the optical film group 26, the diffusion plate 25 and the like. Between the inner frame 27 and the back plate 22. Referring to the third figure at the same time, in order to save the cost of the large injection molding die and improve the reuse rate of the mold, the inner frame 27 is composed of a plurality of independent frame segments 30, 31, each of which is respectively ejected by a die. The manufacturing cost is much lower than the cost of a single large mold. It should be noted that, in the embodiment, each of the frame segments 30, 31 has a joint structure (which will be described in other drawings) to be fixed to the back plate 22, and the frame segments 30, 31 have no joint structure with each other. Connect to each other. Moreover, as an illustration and not limitation, the inner frame 27 of the present embodiment is a rectangle having two long sides and two short sides, each long side including two frame segments 30 and each short side containing only one frame segment 31. .

However, the above-described split-type inner frame 27 design can save a lot of manufacturing costs, but the assembly variability is higher than the integrally formed inner frame 17, which may not meet the requirements of the quality control. For example, the fourth figure shows a partial enlarged view of the third figure, considering that the rectangular inner frame 27 has to carry the weight of the liquid crystal panel 29, so that the frame 30 of each long side of the inner frame 27 and the back plate 22 have a relatively stable structure, for example The fixing of the frame section 31 and the backing plate 22 of each short side takes into consideration the factors such as insufficient assembly space, convenient assembly, saving screw cost, etc., and the design frame section 31 has a notch 41, and is fixed by screws (not shown). The back plate 22 has a hook 32 at a corresponding position of the notch 41, and the two are fastened and fixed to each other. As shown in the figure, the fixing of the hook 32 mode is only restricted in the z direction, but the degree of freedom in the x and y directions is not effectively restrained. This design may be suitable for the integrally formed inner frame 17, but for the split type. The inner frame 27 is troublesome. As shown in the fifth figure, the rectangular inner frame 27 and the back plate 22 are fixed by the hook 32 in the frame segment 31 on the short side. Since the x direction is not restrained, when the short frame segment 31 has residual stress during injection molding. The frame segment 31 of the short side is turned outward by one arc, except that the image quality of the liquid crystal display device 20 is affected, and the opening size of the inner frame 27 or the size of the backlight module 21 cannot meet the requirements during the quality inspection.

In order to solve the problem that the connection between the short frame segment 31 and the back plate 22 is unstable, a feasible method is to use a screw to lock, but this method has the problems of time consuming assembly, high cost, and insufficient assembly space.

The sixth embodiment discloses a possible embodiment. For convenience of explanation and highlighting important features, only the inner frame 27 and the back plate 22 and the like are shown in the figure, and the remaining components of the liquid crystal display device can be the same as those shown in the second figure. The inner frame 27 has a barb 33 under the short frame segment 31. The back plate 22 has a groove 34 at a corresponding position of the barb 33. The barb 33 is engaged with the groove 34 to complete the frame segment 31 and the back plate 22. Combination of. The fixing structure has sufficient stability to restrain the displacement of the frame segment 31 in the x direction and is convenient to assemble, and the fixing structure is not limited to the inner frame 27 of the disassembling type, and can also be used in the conventional one-piece inner frame. 17 (shown in Figure 1), but the disadvantage is that the disassembly is more difficult. For example, the components of the liquid crystal panel 19 or the backlight module 21 need to be repaired, which takes more time; in addition, the mold design of the inner frame 17 is also complicated. The proportion of mold cost reduction is still unsatisfactory.

7 to 9 are views showing a liquid crystal display device of a preferred embodiment of the present invention. For convenience of explanation and highlighting important features, only the inner frame 27 and the back plate 22 and the like are shown in the figure, and the remaining components of the liquid crystal display device may be the same as those shown in the second figure.

7 is a partial enlarged view of the inner frame of the liquid crystal display device of the present invention, and the inner frame may be a split inner frame 27 as shown in the second and third figures, or may be an inner frame 17 as shown in the first figure. The illustration is applied to the split-type inner frame 27. As in the previous embodiment, the inner frame 27 includes a plurality of frame segments 30, 31, wherein at least one of the frame segments 31 includes at least one opening 40, and the appropriate position of the opening is set. A stop 35.

The eighth figure shows a partial enlarged view of the backing plate 22 of the crystal display device of the present invention, the backing plate 22 having a bridge 36 at a corresponding position of the aforementioned stop 35.

The ninth diagram shows an assembled view of the frame section 31 and the backing plate 22. When the stop 35 of the frame segment 31 is inserted into the bridge 36 of the backing plate 22, the assembly is completed. Through the combination of the stopper 35 and the bridge 36, the frame segment 31 can be prevented from being displaced in the x direction. In view of the convenience of assembly and the increase of stability, in addition to the structure of the stopper 35 and the bridge 36, the aforementioned structure of the hook 32 and the notch 41 may be disposed at other positions of the frame 31 and the back plate 22, so that the hook 32 can be provided. Unrestricted x degrees of freedom to reinforce. It should be noted that the block 35 is disposed at a position closer to the inner edge of the opening 40 of the frame segment 31, and after the block 35 is combined with the bridge 36, a bridge outer edge 38 of the bridge 36 and the outer edge 39 of the frame segment 31 are provided. (If the stopper 35 is applied to the integrally formed inner frame 17 and the outer edge 39 of the inner frame) is located on the same plane, the design is such that the space can be more effectively utilized.

Further, in another embodiment of the present invention, the structure is substantially the same as that of the seventh to ninth embodiments, except that the positions of the bridge 36 and the stopper 35 are interchanged. The inner frame 27 includes at least one bridge 36, and the back plate 22 is provided with an opening 40 at a corresponding position of the bridge 36, and the opening is provided with a stopper 35. The stopper 35 is combined with the bridge 36 to make a plurality of light sources 23, a diffusion plate 15, and an optical film group. 26 is fixed between the back plate 22 and the inner frame 27.

According to the above-mentioned embodiment, the displacement of the inner frame in the x direction is obtained by separately using the structure of the stopper 35 and the bridge 36, or the structure of the barb 33 and the groove 34, or further matching the structure of the hook 32 and the notch 41. Effective constraints overcome the lack of prior art. In addition, the above structures all have good assembly convenience. Furthermore, if the above-described respective structures are applied to the split type inner frame 27, it is possible to further save a large mold cost and improve the reuse rate. According to the above disclosure, the liquid crystal display device provided by the present invention has an inner frame and a back plate designed to meet the object of providing sufficient stability, low manufacturing cost, convenient assembly, and the like.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the invention should be included in the following Within the scope of the patent application.

10. . . Liquid crystal display device

11. . . Backlight module

12. . . Backplane

13. . . light source

14. . . Reflective plate

15. . . Diffuser

16. . . Optical film set

17. . . Inner frame

18. . . Outer frame

19. . . LCD panel

20. . . Liquid crystal display device

twenty one. . . Backlight module

twenty two. . . Backplane

twenty three. . . light source

twenty four. . . Reflective plate

25. . . Diffuser

26. . . Optical film set

27. . . Inner frame

28. . . Outer frame

29. . . LCD panel

30. . . Frame segment

31. . . Frame segment

32. . . The hook

33. . . Barb

34. . . Groove

35. . . Stoppers

36. . . bridge

38. . . Bridge outer edge

39. . . Outer edge

40. . . Opening

41. . . gap

The first figure shows a conventional liquid crystal display device;

2 to 6 show a liquid crystal display device according to an embodiment of the present invention; and

7 to 9 show a liquid crystal display device of a preferred embodiment of the present invention.

27. . . Inner frame

31. . . Frame segment

35. . . Stoppers

36. . . bridge

38. . . Bridge outer edge

39. . . Outer edge

Claims (19)

A liquid crystal display device comprising: an outer frame; a liquid crystal panel; and a backlight module, comprising: a back plate; a plurality of light sources located above the back plate; a diffusing plate located above the plurality of light sources; a film assembly, located above the diffusion plate; an inner frame, the liquid crystal panel is fixed between the inner frame and the outer frame, and the inner frame includes at least one opening, the opening is provided with a stopper, the back plate is in the block The corresponding position of the block is provided with a bridge, the block is combined with the bridge to fix the plurality of light sources, the diffusion plate and the optical film group between the back plate and the inner frame; wherein the block is combined with the bridge The outer edge of one bridge of the bridge is in the same plane as an outer edge of the inner frame. The liquid crystal display device of claim 1, wherein the inner frame comprises a plurality of frame segments, and at least one of the frame segments comprises at least one opening and the stopper is disposed. The liquid crystal display device of claim 2, wherein the plurality of frame segments have no connection structure with each other to be connected to each other, and each frame segment is independently coupled to the back plate. The liquid crystal display device of claim 2, wherein the inner frame has a rectangular shape having two long sides and two short sides, and each of the long sides and each short side respectively comprises at least one frame segment. The liquid crystal display device of claim 4, wherein each of the frame segments of each of the short sides includes at least one of the openings provided with the stopper. The liquid crystal display device of claim 5, wherein the at least one frame segment of each short side further comprises at least one hook, and the back plate further comprises a notch at a corresponding position of the hook, the hook and the hook The notch is fastened and fixed. The liquid crystal display device of claim 1, wherein the size of the liquid crystal display device is greater than or equal to 47 吋. A liquid crystal display device comprising: an outer frame; a liquid crystal panel; and a backlight module, comprising: a backing plate; a plurality of light sources located above the backing plate; a diffusing plate located above the plurality of light sources; an optical film group located above the diffusing plate; a frame, the liquid crystal panel is fixed between the inner frame and the outer frame, and the inner frame includes at least one bridge, the back plate is provided with an opening at a corresponding position of the bridge, and the opening is provided with a stopper, and the stopper is combined The bridge causes the plurality of light sources, the diffusion plate, and the optical film group to be fixed between the back plate and the inner frame; wherein the outer edge of the bridge and the inner frame of the bridge are combined with the bridge An outer edge is located on the same plane. The liquid crystal display device of claim 8, wherein the inner frame comprises a plurality of frame segments, and at least one of the frame segments comprises at least one of the bridges. The liquid crystal display device of claim 9, wherein the plurality of frame segments have no connection structure with each other to be connected to each other, and each frame segment is independently coupled to the back plate. The liquid crystal display device of claim 9, wherein the inner frame has a rectangular shape having two long sides and two short sides, and each of the long sides and each short side respectively comprise at least one frame segment. The liquid crystal display device of claim 11, wherein each of the frame segments of each short side comprises at least one of the bridges. The liquid crystal display device of claim 12, wherein the at least one frame segment of each short side further comprises a hook, and the back plate further comprises a notch at the corresponding position of the hook, the hook and the gap Fastened and fixed. The liquid crystal display device of claim 8, wherein the size of the liquid crystal display device is greater than or equal to 47 。. A liquid crystal display device comprising: an outer frame; a liquid crystal panel; and a backlight module, comprising: a back plate; a plurality of light sources are located above the backing plate; a diffusing plate is located above the plurality of light sources; an optical film group is located above the diffusing plate; and an inner frame is fixed between the inner frame and the outer frame And the inner frame includes a plurality of frame segments, at least one of the lower edges of the frame segments is a barb, and the back plate is provided with a groove at a corner position, the barbs are combined with the groove to enable the plurality of light sources, the diffusion The plate and the optical film set are fixed between the back plate and the inner frame. The liquid crystal display device of claim 15, wherein the plurality of frame segments have no connection structure with each other to be connected to each other, and each frame segment is independently coupled to the back plate. The liquid crystal display device of claim 16, wherein the inner frame has a rectangular shape having two long sides and two short sides, and each of the long sides and each short side respectively comprise at least one frame segment. The liquid crystal display device of claim 17, wherein each of the frame segments of each short side includes at least one of the barbs. The liquid crystal display device of claim 15 , wherein each of the short sides of the frame further comprises a hook, and the back plate further comprises a notch at the corresponding position of the hook, the hook and the gap Fastened and fixed.