TW202202915A - Backlight module and display device - Google Patents

Abstract

A backlight module includes a light-emitting unit, a light guide plate for receiving light from the light-emitting unit, a reflective sheet, and a plurality of support members. The reflective sheet has a body portion for supporting the light guide plate, and a plurality of side portions, the side portions are provided on the periphery of the body portion and extend toward the thickness direction of the light guide plate, the body portion and the side portions surround a receiving space for carrying the light guide plate. The support members are respectively disposed at the corners of the reflective sheet, and the structural strength of each support member is greater than that of the reflective sheet. Through the structural design of the reflective sheet, and the support members are arranged at the corner of the reflective sheet, the reflective sheet can replace the functions of the traditional backplate and plastic frame to carry the light guide plate and other optical components, effectively reducing the weight of the backlight module, and the side portions of the reflective sheet can effectively prevent light leakage, and can block dust or foreign objects from entering the interior of the backlight module. The invention also provides a display device including the backlight module.

Description

Backlight module and display device

The present invention relates to an optical device, in particular to a lightweight backlight module and a display device.

Display panels and panel display devices using the display panels have gradually become the mainstream of various display devices. For example, various panel displays, household flat-screen TVs, flat-panel monitors for personal computers and laptops, mobile phones and digital cameras are all products that use display panels in large quantities. Especially in recent years, the market demand for liquid crystal display devices has grown substantially. In order to meet the functional and appearance requirements of liquid crystal display devices, the designs of backlight modules used in liquid crystal display devices are also increasingly diversified.

In order to meet the trend of narrow borders and light weight of modern mobile devices or various display devices, the structure of the existing backlight module must also be reduced in size. The current practice is to break the metal frame in the backlight module to reduce the weight. However, the hole may cause light leakage, or the internal optical components may be recessed at the hole, resulting in an increase in the defective rate of the product. .

Therefore, the purpose of the present invention is to provide a backlight module with light weight and good optical quality.

The backlight module of the present invention includes a light-emitting unit, a light guide plate for receiving light from the light-emitting unit, a reflection sheet, and a plurality of supporting pieces. The reflective sheet has a body portion for supporting the light guide plate, and a plurality of side portions, the side portions are arranged on the periphery of the body portion and extend toward the thickness direction of the light guide plate, the body portion and the side portions The edges together surround a accommodating space for carrying the light guide plate. The support members are respectively arranged at the corners of the reflection sheet, and the structural strength of the support members is greater than that of the reflection sheet.

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 of the reflection sheet.

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

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.

Another technical means of the present invention is that each support member further includes at least one adhesive layer disposed on the bottom wall, and the adhesive layer adheres the bottom wall of the support member to the body portion of the reflector.

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.

Another technical means of the present invention is that the light-emitting unit includes a lampshade, and the lampshade is combined with the side of the reflection sheet on which the side portion is not provided.

Another technical means of the present invention is that the body portion of the reflector is quadrilateral, the number of the side portions is three, and the three side portions and the lampshade are arranged around the periphery of the body portion together.

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.

Another object of the present invention is to provide a display device including the aforementioned backlight module, and a display panel disposed on the backlight module, and the support member is used to support the display panel.

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.

The effect of the present invention is that, through the structural design of the reflective sheet, and the supporting members are arranged at the corners of the reflective sheet, so that the reflective sheet can replace the functions of the traditional backplane and the plastic frame to carry the light guide plate and other The optical element can effectively reduce the weight of the overall structure, and the side portion of the reflective sheet can effectively prevent light leakage, and can prevent dust or foreign matter from entering the interior of the backlight module.

The features and technical contents of the relevant patent applications of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Before the detailed description, it should be noted that similar elements are designated by the same reference numerals.

Referring to FIG. 1 and FIG. 2 , it is a first preferred embodiment of the backlight module 2 of the present invention, comprising a light-emitting unit 21 , a light-guiding plate 22 for receiving the light-emitting line of the light-emitting unit 21 , a plurality of light guide plates stacked on the light-emitting unit 21 . The optical film 23 on the light plate 22 , a reflection sheet 24 for supporting the light guide plate 22 , and a plurality of support members 25 disposed at the corners of the reflection sheet 24 .

Referring to FIGS. 2 and 3 , the reflection sheet 24 has a body portion 241 for supporting the light guide plate 22 , and a plurality of side portions 242 . The side portions 242 are disposed on the periphery of the body portion 241 and face the guide plate 241 . The light plate 22 extends in the thickness direction, and the body portion 241 and the side portion 242 together surround a accommodating space 240 for supporting the light guide plate 22 . In this embodiment, the main body portion 241 of the reflection sheet 24 is rectangular, and the number of the support members 25 is four, which are disposed at four corners of the main body portion 241 of the reflection sheet 24 . It should be further explained that when the body portion 241 of the reflection sheet 24 is rectangular, the number of the side portions 242 may be three or four. In this embodiment, only three side portions 242 are used as an example for illustration. The side without the side portion 242 is provided for the light-emitting unit 21. The light-emitting unit 21 includes a lampshade 211, which is combined with the side of the reflector 24 without the side portion 242 to ensure the light-emitting unit. The light source (eg LED die) on 21 is not damaged by collision, and the structural strength of the side can also be strengthened.

Referring to FIGS. 4 and 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 and the reflection sheet 24 are bonded together by means of adhesive. Therefore, as shown in FIG. 5 , each support member 25 further includes an adhesive layer 253 disposed on the side wall 252 . The adhesive layer 253 adheres the side wall 252 of the support member 25 to the side edge 242 of the reflection sheet 24 , so as to firmly combine the support member 25 with the reflection sheet 24 . It should be particularly noted that, in this embodiment, bonding is taken as an example for description, and the method of bonding may also be insertion or locking, which is not limited to what is disclosed in this embodiment.

Through the above-mentioned bonding method, after the four support members 25 are respectively combined with the four corners of the reflection sheet 24, the state shown in FIG. 1 can be assembled. As shown in FIG. 5 , since the side portion 242 of the reflective sheet 24 is bent upward from the body portion 241 , and cooperates with the setting of the support member 25 to form a position limit, and the support member 25 The structural strength of the reflective sheet 24 is greater than the characteristics of the reflective sheet 24, so the combination of the reflective sheet 24 and the support member 25 can replace the carrying function of the traditional backplane and the plastic frame to carry the light guide plate 22 and the optical film 23. , effectively reducing the weight of the overall structure. At the same time, the traditional backplane and the plastic frame are eliminated, and the number of adhesive tapes for combining the backplane, the plastic frame and the reflective sheet 24 can be reduced, and the assembly process can be simplified. In addition, the design of the upward bending of the side portion 242 of the reflective sheet 24 can also block the side edges of the light guide plate 22 and the optical film 23, which can avoid the problem of lateral light leakage and prevent the Dust or foreign objects enter the interior of the backlight module 2 .

After the installation of the support member 25 is completed, as shown in FIG. 6 , a display panel 3 can be installed to form a display device. The display panel 3 is disposed on the top wall 251 of the support member 25 , and is jointly supported by the top wall 251 of the support member 25 .

Referring to FIG. 7, it is the second preferred embodiment of the backlight module 4 of the present invention, which also includes a light-emitting unit (not shown in the figure due to the viewing angle), a light guide plate 42 for receiving the light-emitting lines of the light-emitting unit , a plurality of optical films 43 stacked on the light guide plate 42 , a reflection sheet 44 for supporting the light guide plate 42 , and a plurality of support members 45 arranged at the corners of the reflection sheet 44 . The reflection sheet 44 has a body portion 441 for supporting the light guide plate 42 , and a plurality of side portions 442 .

The difference is: as shown in FIG. 7 and FIG. 8 , in this embodiment, each support member 45 includes a top wall 451 , a side wall 452 extending downward from the top wall 451 , and a side wall 452 connected to the top wall 451 . And a bottom wall 453 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 for bonding the bottom wall 453 of the support member 45 and the body portion 441 of the reflective sheet 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 enhance the support member 45 for the reflection sheet 44, the light guide plate 42, As well as the bearing function of the optical film 43 , the possibility of the reflective sheet 44 and the support member 45 being separated from each other due to the reduced viscosity of the adhesive layer 454 is avoided. In actual implementation, the adhesive layer 454 may be disposed on both the side wall 452 and the bottom wall 453 to enhance the bonding effect of the reflection sheet 44 and the support member 45 .

In addition, it should be noted that, in this embodiment, the end edge of the side wall 452 of each support member 45 is flush with the end edges of the top wall 451 and the bottom wall 453. In actual implementation, it is also possible to As shown in FIG. 9, the end edge of the side wall 452 is not flush with the end edges of the top wall 451 and the bottom wall 453, but retreats inward to form a gap, providing another use form to Facilitate the assembly of other components.

To sum up, the present invention uses the structural design of the reflective sheet and the supporting members are arranged at the corners of the reflective sheet, so that the reflective sheet can replace the functions of the traditional backplane and the plastic frame to carry the light guide plate and the For other optical components, the side portion of the reflective sheet can effectively prevent light leakage, and can block dust or foreign objects from entering the interior of the backlight module, thereby achieving the effect of light weight and good optical quality.

However, the above are only preferred embodiments of the present invention, and should not limit the scope of the present invention, that is, any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the description of the invention, All still fall within the scope of the patent of the present invention.

2: Backlight module 21: Lighting unit 211: Lampshade 22: light guide plate 23: Optical film 24: Reflector 240: accommodating space 241: body part 242: side part 25: Supports 251: Top Wall 252: Sidewall 253: Adhesive layer 3: Display panel 4: Backlight module 42: light guide plate 43: Optical film 44: Reflector 441: body part 442: side part 45: Supports 451: Top Wall 452: Sidewall 453: Bottom Wall 454: Adhesive layer

FIG. 1 is a top view, which is the first preferred embodiment of the backlight module of the present invention; Fig. 2 is an exploded perspective view, which is helpful to illustrate the disassembled state of Fig. 1. For the sake of brevity of the picture, some elements are omitted and not drawn; Fig. 3 is a perspective view, which is an enlargement of the place shown in the frame in Fig. 2; 4 is a perspective view illustrating the structure of a support member in the first preferred embodiment; FIG. 5 is a side cross-sectional view illustrating the combination of the support and a reflector; 6 is a side cross-sectional view, adding a display panel to the first preferred embodiment to form a display device; 7 is a side cross-sectional view, which is the second preferred embodiment of the backlight module of the present invention; 8 is a perspective view illustrating the structure of a support member in the second preferred embodiment; and FIG. 9 is a perspective view illustrating a modification of the support member in the second preferred embodiment.

2: Backlight module

21: Lighting unit

211: Lampshade

22: light guide plate

23: Optical film

24: Reflector

240: accommodating space

241: body part

242: side part

25: Supports

Claims (10)

A backlight module, comprising: a light-emitting unit; a light guide plate for receiving the light of the light-emitting unit; a reflection sheet, which has a main body part for supporting the light guide plate, and a plurality of side parts, the side parts are arranged on the periphery of the main body part and extend toward the thickness direction of the light guide plate, the main part and the The side portions together surround a accommodating space for carrying the light guide plate; and A plurality of support members are respectively arranged at the corners of the reflection sheet, and the structural strength of the support members is greater than that of the reflection sheet. The backlight module of claim 1, wherein each support member includes a top wall, and a side wall extending downward from the top wall, and the side wall is combined with a side edge of the reflective sheet. The backlight module of claim 2, wherein each support member further comprises at least one adhesive layer disposed on the side wall, the adhesive layer bonding the side wall of the support member and the side edge of the reflective sheet. The backlight module of claim 2, wherein each support member further includes a bottom wall connected to the side wall and extending in the same direction as the top wall. The backlight module of claim 4, wherein each support member further comprises at least one adhesive layer disposed on the bottom wall, and the adhesive layer adheres the bottom wall of the support member to the body portion of the reflective sheet . The backlight module of claim 4, wherein 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. The backlight module of claim 1, wherein the light-emitting unit comprises a lampshade, and the lampshade is coupled to a side of the reflective sheet on which the side portion is not provided. The backlight module according to claim 7, wherein the body portion of the reflective sheet is quadrilateral, the number of the side portions is three, and the three side portions and the lampshade are arranged around the periphery of the body portion together . The backlight module according to claim 1, further comprising a plurality of optical films stacked on the light guide plate. A display device includes the backlight module according to any one of claim 1 to claim 9, and a display panel disposed on the backlight module, and the support member is used to support the display panel.

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