Backlight module and display device

Abstract

The present invention relates to a backlight module and a display device. The backlight module comprises a light-emitting unit, a light guide plate for receiving light from the light-emitting unit, a reflective sheet and a plurality of supporting members. The reflective sheet has a main body for carrying the light guide plate and a plurality of side portions, the side portions are arranged at the periphery of the main body and extend toward the light guide plate along the thickness direction of the light guide plate, and the main body and the side portions together surround a containing space for carrying the light guide plate. A plurality of supporting members are respectively arranged at the corners of the reflective sheet, and the structural strength of the supporting members is greater than the structural strength of the reflective sheet. By utilizing the design of the side portions of the reflective sheet being bent upward and the supporting members arranged at the corners of the reflective sheet, the reflective sheet can replace the traditional back plate and the rubber frame to realize the function of carrying the light guide plate and other optical elements, effectively reducing the weight of the overall structure, and the side portions of the reflective sheet can effectively prevent light leakage and prevent dust or foreign matter from entering the interior of the backlight module.

Description

Technical Field

[0001] The invention relates to an optical device, and in particular to a lightweight backlight module and a display device. Background Art

[0002] Display panels and display devices using display panels have gradually become the mainstream of various display devices. For example, various panel display screens, household flat-screen TVs, flat-panel monitors for personal computers and laptop computers, mobile phones and digital camera displays, etc., are all products that use display panels in large quantities. In particular, the market demand for liquid crystal display devices has grown significantly in recent years. In order to meet the requirements of liquid crystal display devices in terms of function and appearance, the design of backlight modules used in liquid crystal display devices has also become increasingly diversified.

[0003] In order to meet the trend of narrow frame and light weight of modern mobile devices or various display devices, the existing backlight module structure must also be thinner and lighter. The current practice is to make holes in the metal frame of the backlight module to reduce the weight. However, the holes may cause light leakage or cause the internal optical components to sag at the holes, thereby increasing the defective rate of the product. Summary of the invention

[0004] Therefore, an object of the present invention is to provide a backlight module that is lightweight and has good optical quality.

[0005] The backlight module of the present invention comprises a light-emitting unit, a light guide plate for receiving light from the light-emitting unit, a reflective sheet and a plurality of supporting members. The reflective sheet has a main body for carrying the light guide plate and a plurality of side portions, the side portions are arranged at the periphery of the main body and extend toward the light guide plate along the thickness direction of the light guide plate, and the main body and the side portions together surround a receiving space for carrying the light guide plate. The plurality of supporting members are respectively arranged at the corners of the reflective sheet, and the structural strength of the supporting members is greater than the structural strength of the reflective sheet.

[0006] Another technical means of the present invention is that each support member includes a top wall and a side wall extending downward from the top wall, and the side wall is combined with the side edge portion of the reflective sheet.

[0007] Another technical means of the present invention is that each support member further includes an adhesive layer at least arranged on the side wall, and the adhesive layer adheres the side wall of the support member to the side edge of the reflective sheet.

[0008] Another technical means of the present invention is that each support member further includes a bottom wall connected to the side wall and extending in the same direction as the top wall.

[0009] Another technical means of the present invention is that each support member further includes an adhesive layer at least arranged on the bottom wall, and the adhesive layer adheres the bottom wall of the support member to the main body of the reflective sheet.

[0010] Another technical means of the present invention is that the end edge of the side wall of each support member is flush with the end edges of the top wall and the bottom wall.

[0011] Another technical means of the present invention is that the light-emitting unit includes a lampshade, and the lampshade is combined with a side of the reflective sheet where the side edge portion is not provided.

[0012] Another technical means of the present invention is that the main body of the reflector has a quadrilateral structure, the number of the side portions is three, and the three side portions and the lampshade are arranged together around the periphery of the main body.

[0013] Another technical means of the present invention is that the backlight module further includes a plurality of optical films stacked on the light guide plate.

[0014] Another object of the present invention is to provide a display device, comprising the aforementioned backlight module and a display panel disposed on the backlight module, wherein the support member is used to carry the display panel.

[0015] Another technical means of the present invention is that the display device further includes a plurality of optical films stacked on the light guide plate and located between the light guide plate and the display panel.

[0016] The effect of the present invention lies in that, by utilizing the structural design of the side edge of the reflective sheet being bent upward and then arranging supporting members at the corners of the reflective sheet, the reflective sheet can replace the traditional back plate and the rubber frame to realize the function of carrying the light guide plate and other optical elements, thereby effectively reducing the weight of the overall structure. The side edge of the reflective sheet can effectively prevent light leakage and can block dust or foreign matter from entering the interior of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view showing a first preferred embodiment of the backlight module of the present invention;

[0018] Figure 2 It is an auxiliary explanation Figure 1 The exploded view of the exploded state of the 3D image. For the sake of simplicity, some components are not drawn;

[0019] Figure 3 It is shown Figure 2 An enlarged stereogram of the box shown in FIG.

[0020] Figure 4 is a perspective view illustrating the structure of a support member in a first preferred embodiment;

[0021] Figure 5 is a side cross-sectional view illustrating the combination of the support member and the reflective sheet;

[0022] Figure 6 is a side cross-sectional view showing a display device including a backlight module and a display panel of a first preferred embodiment;

[0023] Figure 7 is a side cross-sectional view showing a second preferred embodiment of the backlight module of the present invention;

[0024] Figure 8 is a perspective view illustrating the structure of a support member in a second preferred embodiment; and

[0025] Fig. 9 It is a perspective view illustrating a variation of the support member in the second preferred embodiment. DETAILED DESCRIPTION

[0026] The features and technical contents of the related patent applications of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before the detailed description, it should be noted that similar elements are represented by the same numbers.

[0027] See also Figure 1 and Figure 2 , which is a first preferred embodiment of the backlight module 2 of the present invention, comprises a light emitting unit 21, a light guide plate 22 for receiving light emitted by the light emitting unit 21, a plurality of optical films 23 stacked on the light guide plate 22, a reflective sheet 24 for supporting the light guide plate 22, and a plurality of support members 25 arranged at the corners of the reflective sheet 24.

[0028] See also Figure 2 and Figure 3 The reflective sheet 24 has a main body 241 for carrying the light guide plate 22 and a plurality of side portions 242. The side portions 242 are arranged at the periphery of the main body 241 and extend toward the light guide plate 22 along the thickness direction of the light guide plate 22. The main body 241 and the side portions 242 together surround a receiving space 240 for carrying the light guide plate 22. In the present embodiment, the main body 241 of the reflective sheet 24 is rectangular, and the number of the supporting members 25 is four. The four supporting members 25 are respectively arranged at the four corners of the main body 241 of the reflective sheet 24. It should be further explained that when the main body 241 of the reflective sheet 24 is rectangular, the number of the side portions 242 can be three or four. In the present embodiment, only three side portions 242 are used as an example for explanation, and the side of the reflective sheet 24 where the side portion 242 is not arranged is used for the light emitting unit 21 to be arranged. The light emitting unit 21 includes a lampshade 211 which is combined with the side of the reflector 24 where the side edge portion 242 is not provided to prevent the light source (eg LED die) on the light emitting unit 21 from being damaged by collision and also to enhance the structural strength of the side.

[0029] See also Figure 4 and Figure 5 Each support member 25 includes a top wall 251 and a side wall 252 extending downward from the top wall 251. In this embodiment, the support member 25 is combined with the reflective sheet 24 by bonding. Figure 5 As shown, each support member 25 further includes an adhesive layer 253 disposed on the side wall 252, and the adhesive layer 253 bonds the side wall 252 of the support member 25 to the side edge portion 242 of the reflector 24, thereby firmly combining the support member 25 with the reflector 24. It should be particularly noted that in this embodiment, bonding is used as an example for description, but insertion or locking methods can also be used to combine the support member 25 with the reflector 24, and the present invention is not limited to this embodiment.

[0030] By bonding the four support members 25 to the four corners of the reflector 24, the assembly can be completed as follows: Figure 1 As shown. Figure 5 As shown, since the side portion 242 of the reflector 24 is formed by bending the main body 241 upward, the support member 25 is configured to have a limiting function, and the structural strength of the support member 25 is greater than the structural strength of the reflector 24, the combination of the reflector 24 and the support member 25 can replace the traditional back plate and the rubber frame to realize the bearing function, and is used to carry the light guide plate 22 and the optical film 23, thereby effectively reducing the weight of the overall structure. At the same time, eliminating the traditional back plate and the rubber frame can also reduce the number of adhesive tapes used to combine the back plate, the rubber frame and the reflector 24, thereby simplifying the assembly process. In addition, the design of the side portion 242 of the reflector 24 bending upward can also stop at the side of the light guide plate 22 and the optical film 23, thereby avoiding the problem of lateral light leakage, and also preventing dust or foreign matter from entering the interior of the backlight module 2.

[0031] After the support member 25 is installed, Figure 6 As shown, the display panel 3 is then installed to form a display device. The display panel 3 is disposed on the top wall 251 of the support member 25 and is supported by the top wall 251 of the support member 25 .

[0032] See also Figure 7 , which is a second preferred embodiment of the backlight module 4 of the present invention, also comprises a light emitting unit (not shown in the figure due to viewing angle), a light guide plate 42 for receiving light emitted by the light emitting unit, a plurality of optical films 43 stacked on the light guide plate 42, a reflective sheet 44 for carrying the light guide plate 42, and a plurality of supporting members 45 disposed at the corners of the reflective sheet 44. The reflective sheet 44 has a main body 441 for carrying the light guide plate 42 and a plurality of side portions 442.

[0033] The second preferred embodiment is different from the first preferred embodiment in that: Figure 7 and Figure 8 As shown, in this embodiment, each support member 45 includes a top wall 451, a side wall 452 extending downward from the top wall 451, a bottom wall 453 connected to the side wall 452 and extending in the same direction as the top wall 451, and an adhesive layer 454 disposed on the bottom wall 453. The adhesive layer 454 is used to bond the bottom wall 453 of the support member 45 to the body 441 of the reflector 44. With this design, in addition to achieving the same effect as the first preferred embodiment, the design of the bottom wall 453 of the support member 45 can also enhance the bearing effect of the support member 45 on the reflector 44, the light guide plate 42 and the optical film 43, thereby avoiding the possibility of the reflector 44 and the support member 45 being separated from each other due to the decrease in the viscosity of the adhesive layer 454. In actual implementation, the adhesive layer 454 can also be disposed on both the side wall 452 and the bottom wall 453 to enhance the bonding effect of the reflector 44 and the support member 45.

[0034] In addition, it should be particularly noted that, in this embodiment, the end edge of the side wall 452 of each support member 45 is flush with the end edge of the top wall 451 and the bottom wall 453. Fig. 9 As shown, the end edge of the side wall 452 is not flush with the end edge of the top wall 451 and the bottom wall 453 , but retreats inward to form a notch, thereby providing another usage form to facilitate the assembly of other components.

[0035] In summary, the present invention utilizes a structural design in which the side portions of the reflective sheet are bent upward and supports are provided at the corners of the reflective sheet, so that the reflective sheet can replace the traditional back panel and the rubber frame to realize the function of carrying the light guide plate and other optical elements, thereby effectively reducing the weight of the overall structure; in addition, the side portions of the reflective sheet can effectively prevent light leakage and can block dust or foreign matter from entering the interior of the backlight module, thereby achieving an optical quality effect.

[0036] The above is only a preferred embodiment of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the scope of the claims and the content of the specification of the present invention are still within the scope of the patent of the present invention.

[0037] [List of Reference Numerals]

[0038] 2 Backlight module

[0039] 21 Lighting Unit

[0040] 211 Lampshade

[0041] 22 Light guide plate

[0042] 23 Optical film

[0043] 24 Reflective sheet

[0044] 240 Storage Space

[0045] 241 Ontology Department

[0046] 242 Side

[0047] 25 Support

[0048] 251 Top wall

[0049] 252 Sidewall

[0050] 253 Adhesive layer

[0051] 3 Display Panel

[0052] 4 Backlight module

[0053] 42 Light guide plate

[0054] 43 Optical film

[0055] 44 Reflective sheet

[0056] 441 Ontology Department

[0057] 442 Side

[0058] 45 Support

[0059] 451 Top wall

[0060] 452 Sidewall

[0061] 453 bottom wall

[0062] 454 Adhesive layer.

Claims

1. A backlight module, characterized in that: Include: Light emitting unit; A light guide plate, used for receiving light from the light emitting unit; A reflective sheet having a main body portion for carrying the light guide plate and a plurality of side portions, wherein the side portions are arranged at the periphery of the main body portion and extend toward the light guide plate along the thickness direction of the light guide plate, and the main body portion and the side portions together surround an accommodation space for carrying the light guide plate; and A plurality of support members are respectively arranged at the corners of the reflector sheet, and the structural strength of the support members is greater than the structural strength of the reflector sheet, wherein: Each of the supporting members includes a top wall and a side wall extending downward from the top wall, wherein the side wall is combined with the side edge of the reflective sheet. The side wall includes a first side wall portion extending along a first direction and a second side wall portion connected to the first side wall portion and extending along a second direction intersecting the first direction. The first side wall portion and the second side wall portion respectively abut against two adjacent side edges of the reflector to limit the reflector in the first direction and the second direction.

2. The backlight module according to claim 1, characterized in that: Each of the supporting members further includes an adhesive layer at least arranged on the side wall, and the adhesive layer adheres the side wall of the supporting member to the side edge of the reflective sheet.

3. The backlight module according to claim 1, characterized in that: Each of the supporting members further includes a bottom wall connected to the side walls and extending in the same direction as the top wall.

4. The backlight module according to claim 3, characterized in that: Each of the supporting members further includes an adhesive layer at least disposed on the bottom wall, and the adhesive layer bonds the bottom wall of the supporting member to the main body of the reflective sheet.

5. The backlight module according to claim 3, characterized in that: The end edge of the side wall of each of the supporting members is flush with the end edges of the top wall and the bottom wall.

6. The backlight module according to claim 1, characterized in that: The light emitting unit includes a lampshade, and the lampshade is combined with a side of the reflective sheet where the side edge portion is not provided.

7. The backlight module according to claim 6, characterized in that: The main body of the reflector sheet has a quadrilateral structure, the number of the side portions is three, and the three side portions and the lampshade are arranged together around the periphery of the main body.

8. The backlight module according to claim 1, characterized in that: It also includes a plurality of optical films stacked on the light guide plate.

9. A display device, characterized in that: Include: The backlight module according to any one of claims 1 to 8; and The display panel is arranged on the backlight module, and the support member is used to carry the display panel.

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