Reflective structure with overlapping areas overlapping with each other, backlight module and display device

Abstract

Provided are a reflective structure (100), a backlight module, and a display device. The reflective structure (100) is formed by assembling at least two reflective sheets (10), and each of the reflective sheets (10) has an overlapping area (11) with at least one end corner (12) of the overlapping area (11) having a notch (13), wherein two adjacent reflective sheets (10) overlap with each other in the two overlapping areas (11), and the two notches (13) of the two adjacent reflective sheets (10) are connected to each other to form a positioning notch (20).

Description

Reflective structure with overlapping areas, backlight module and display device Technical Field

[0001] The present invention relates to a reflective structure, and more particularly to a reflective structure applied to a narrow-frame backlight module and overlapped with each other in overlapping areas. Background Art

[0002] Currently, backlight modules and display devices are designed to be as close to the frame as possible in response to design requirements. The narrower the frame, the closer it can be to the side wall, making the screen display area larger. Therefore, the LED distribution in the backlight module must be very close to the side wall. There is no space between the LED and the side wall for positioning the reflector. This may cause the reflector to be offset when it is attached to the light board. In addition, when the backlight module is at high or low temperatures, the LEDs in the backlight module cause uneven heating of the entire unit, resulting in local temperature differences. This in turn causes the reflector to expand and contract locally, pulling and interfering with the light-emitting elements. The reflector may also deform, dislocate, or squeeze other structures, causing abnormalities in the appearance of the light, resulting in poor uniformity of the backlight module's luminous surface, and even backlight module failure.

[0003] In view of this, it is necessary to provide a positioning structure for a reflector to solve the above problems.

[0004] Summary of the Invention

[0005] The present invention aims to provide a positionable reflective structure, which is formed by splicing at least two reflective sheets so that the overlapping areas of the spliced ​​reflective sheets can be connected to form a positioning gap, thereby achieving the purpose of ensuring the optical quality of the backlight module.

[0006] A second object of the present invention is to provide a backlight module and a display device that are used in conjunction with the aforementioned positionable reflective structure, which can prevent the reflective sheet from being uneven due to local expansion and contraction, thereby achieving the purpose of maintaining light uniformity and ensuring optical quality.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a reflective structure, which is composed of at least two reflective sheets spliced ​​together, each of which has an overlapping area, and at least one end corner of the overlapping area has a notch; wherein, two adjacent reflective sheets are overlapped with each other with the two overlapping areas, and the two notches of the two adjacent reflective sheets are connected to form a positioning notch.

[0008] The present invention provides a backlight module, comprising: a reflective structure as described above; a light board located below the reflective structure; a support member extending through the reflective structure, the positioning notch surrounding the support member; and at least one optical film supported by the support member.

[0009] The present invention further provides a display device, comprising: the aforementioned backlight module; and a display panel disposed in front of the backlight module.

[0010] In some embodiments, the notch is arc-shaped.

[0011] In some embodiments, the reflective sheet is polygonal.

[0012] In some embodiments, the reflective sheet is fan-shaped.

[0013] In some embodiments, the number of the reflective sheets is four, the notches of the four reflective sheets are connected to form the positioning notch, and the positioning notch is circular.

[0014] In some embodiments, a first distance exists between the positioning notch and the supporting member.

[0015] In some embodiments, the light board includes a plurality of light-emitting elements; wherein each of the reflective sheets has a plurality of openings, the plurality of openings are spaced apart on each of the reflective sheets, the plurality of openings accommodate at least one of the plurality of light-emitting elements, and each of the openings has a second spacing with the light-emitting element, the second spacing being greater than the first spacing.

[0016] The present invention adopts a reflective structure with overlapping regions, comprising at least two reflective sheets with notches. Each reflective sheet uses the notches at its end corners to abut against a support member located between the reflective sheets, thereby ensuring the optical quality of the backlight module.

[0017] The present invention also provides a backlight module and a display device that are matched with the above-mentioned reflective structure with overlapping areas, and have the following characteristics: each reflective sheet has a notch at at least one end corner of the overlapping area, so that when the reflective sheets are overlapped with each other, the notches can be connected to form a positioning notch, and the support member can be extended through the reflective structure from the positioning notch. In this way, the support member can be used as a positioning member for the reflective sheet without adding space for other positioning mechanisms, thereby realizing an ultra-narrow frame design, and avoiding local expansion and contraction of the reflective sheet that causes unevenness of the reflective sheet, thereby achieving the purpose of maintaining light uniformity and optical quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of a reflective sheet of the present invention.

[0019] FIG2 is a schematic diagram of the reflective structure of the present invention.

[0020] FIG3 is a partially enlarged schematic diagram of the reflective structure of the present invention.

[0021] FIG4 is a schematic diagram of a backlight module of the present invention.

[0022] FIG5 is a partially enlarged schematic diagram of the backlight module of the present invention.

[0023] FIG6 is a partially enlarged top view of the backlight module of the present invention.

[0024] FIG7 is a schematic side cross-sectional view of a display device according to the present invention. DETAILED DESCRIPTION

[0025] Now, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are primarily simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner. Therefore, only elements related to the present invention are indicated in these drawings, and the elements shown are not drawn based on the number, shape, size ratio, etc. of the elements in actual implementation. The specifications and dimensions of the elements in actual implementation are actually a selective design, and the element layout may be more complex.

[0026] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented. Directional terms mentioned in the present invention, such as "upper," "lower," "front," and "rear," are only used with reference to the directions in the accompanying drawings. Therefore, the directional terms used are intended to illustrate and understand the present application, not to limit the present application. In addition, in the specification, unless expressly stated to the contrary, the word "comprising" will be understood to mean including the stated elements but not excluding any other elements.

[0027] Please refer to Figures 1 to 3 , which illustrate a preferred embodiment of a reflective structure 100 of the present invention. The reflective structure 100 is formed by splicing at least two reflective sheets 10. The reflective sheets 10 may be polygonal or fan-shaped, but are not limited thereto. Each reflective sheet 10 has an overlapping region 11 distributed around the periphery of the reflective sheet 10. At least one corner 12 of the overlapping region 11 has a notch 13. The notch 13 may be arc-shaped or polygonal, but is not limited thereto. Two adjacent reflective sheets 10 are overlapped at the overlapping regions 11, and the two notches 13 of the adjacent reflective sheets 10 are connected to form a positioning notch 20. Because the reflector sheet 10 expands and contracts due to temperature, the reflector sheet 10 is split into several pieces and then assembled into the reflective structure 100. This allows the smaller reflector sheets 10 to expand and contract less than the original reflector sheet 10, thus distributing the overall expansion and contraction. Furthermore, when the reflector sheets 10 are assembled after being split, the risk of dark shadows appearing at the joints must be avoided. Therefore, the reflector sheets 10 overlap at the joints to ensure consistent light reflectivity. Notches 13 are designed at the corners 12 of the overlapping regions 11 of the reflector sheets 10. This allows the reflector sheets 10 to be aligned with other fixed components of the backlight module, such as the support members 30 for supporting optical components and located between the reflector sheets 10, by forming a positioning notch 20 formed by the two notches 13. Preferably, the shape of the notch 13 in the reflector sheet 10 corresponds to the contour of the support member 30 to be aligned. In summary, the reflective structure 100 of the present invention can be aligned with the fixed components of the backlight module. Not only can the mobility of the reflective structure 100 relative to the backlight module be utilized to avoid the unevenness caused by the expansion and contraction of the reflective sheet 10, but the overlapping areas 11 of adjacent reflective sheets 10 can also ensure the consistency of the light reflectivity of the entire reflective sheet 10, thereby achieving the effect of maintaining the optical quality of the backlight module.

[0028] Please refer to Figures 2 to 3. In this embodiment, the reflector 10 is rectangular, and the notch 13 at the end corner 12 of the reflector 10 is arc-shaped. Therefore, the notch 13 of the reflective structure 100 formed by overlapping two adjacent reflectors 10 will form a semicircular positioning notch 20. If four adjacent reflectors 10 are overlapped, the notch 13 of the reflective structure 100 will form a circular positioning notch 20.

[0029] Please refer to Figures 4 to 7, which are a preferred embodiment of the backlight module of the present invention, including a reflective structure 100 as described above, a lamp board 40 located below the reflective structure 100, a support member 30 extending through the positioning notch 20 of the reflective structure 100 so that the positioning notch 20 surrounds the support member 30, and at least one optical film 50 supported by the support member 30. The optical film 50 may include a diffuser or a prism, but is not limited thereto. In this way, the support member 30 located in a relatively central position can be used as a positioning point for the boundaries of the reflective sheet 10 to overlap with each other, thereby preventing the reflective sheet 10 from exposing the lamp board 40 below due to thermal expansion and contraction, thereby ensuring the consistency of light reflectivity. In another embodiment, the reflective sheet 10 of the present invention and the lamp board 40 can be further bonded with a glue 42 to ensure the stability of the combination of the reflective sheet 10.

[0030] In the embodiment of the backlight module with a larger area, the support member 30 is combined with the back plate 70 to support the optical film 50 to prevent the optical film 50 from sagging and becoming uneven. Therefore, it is better to set multiple support members 30 in a large-sized backlight module.

[0031] The present invention utilizes the positioning notches 20 of the reflective structure 100 surrounding the periphery of the support member 30 to position the reflective sheet 10 relative to the support member 30. This prevents displacement and deformation of the reflective sheet 10 due to thermal expansion and contraction caused by large temperature fluctuations. Instead, the reflective sheet 10 can be limited to the expansion, contraction, and displacement space between two adjacent support members 30. For example, the reflective sheet 10 in this embodiment is square, and the notch 13 of the reflective sheet 10 is located at one corner of the square. Therefore, the notch 13 of each reflective sheet 10 is in the shape of a quarter sector, thereby forming a circle when spliced ​​together. The square reflective sheet 10 of this embodiment can be applied to the support member 30 of a rectangular backlight module and a circular base, facilitating rapid assembly.

[0032] In another embodiment, the positioning notch 20 and the support member 30 have a first spacing D1. This ensures that the overlapping areas of each reflector sheet 10 are not exposed when the light panel 40 contracts due to cold conditions. Furthermore, the first spacing D1 provides ample room to accommodate expansion of the reflector sheet 10 when the light panel 40 expands due to heat. Furthermore, the aforementioned circular positioning notch 20 paired with the conical support member 30 allows the bottom surfaces of the positioning notch 20 and the support member 30 to align, ensuring that the shortest vertical distance between the positioning notch 20 and the support member 30, i.e., the first spacing D1, is uniform everywhere. Therefore, the support member 30 serves as a reference for the proper positioning and alignment of the reflector sheet 10.

[0033] In another embodiment, the positioning notch 20 and the support member 30 are spaced apart by a first distance D1. The light panel 40 includes a plurality of light-emitting elements 41. Each reflective sheet 10 has a plurality of openings 14, each of which is spaced apart from the reflective sheet 10 to accommodate at least one of the light-emitting elements 41. Each opening 14 is spaced apart from the light-emitting element 41 by a second distance D2, which is greater than the first distance D1. Therefore, when the reflective sheet 10 begins to expand due to high temperature in the backlight module, the edge of the reflective sheet 10 will first abut the side surface of the support member 30 with a smaller spacing. Since the edge of the opening 14 of the reflective sheet 10 is spaced apart from the light-emitting element 41, the reflective sheet 10 will not push against the light-emitting element 41 due to thermal expansion, or even displace the light-emitting element 41. This allows the light-emitting element 41 to remain in its original position, maintaining uniform brightness across the backlight module.

[0034] By using the support member 30 as the positioning basis for the reflector 10, there is no need to reserve space for setting up other positioning mechanisms for positioning the reflector 10, which saves a lot of space between the backlight module and the side wall. In this way, the edge of the backlight module can be designed closer to the side wall to achieve the requirement of a narrow frame.

[0035] Please refer to FIG. 7 , which shows a preferred embodiment of the display device of the present invention, including: a backlight module as described above, and a display panel 60 . The display panel 60 is disposed in front of the backlight module.

[0036] As described above, the backlight module and display device of the present invention can employ a reflective structure 100 comprising spliced ​​reflective sheets 10, wherein each reflective sheet 10 has at least one notch 13 at its corner 12. The notches 13 of two adjacent reflective sheets 10 form a positioning notch 20 in the overlapping region 11. A first distance D1 is established between the positioning notch 20 and the support member 30 in the backlight module, and a second distance D2 is established between the edge of the opening 14 of the reflective sheet 10 and the light-emitting element 41. When the reflective sheet 10 expands and stretches due to high temperature, the support member 30 acts as abutment and positioning member for the reflective sheet 10. This prevents the reflective sheet 10 from further expansion and extension, and prevents the reflective sheet 10 from pushing against the light-emitting element 41 and affecting the uniformity of the overall light emission. The reflective sheet 10 is thus positioned effectively.

[0037] The embodiments disclosed above are merely illustrative of the principles, features, and effects of the present invention and are not intended to limit the scope of the present invention. Any person skilled in the art may modify or alter the embodiments described above without departing from the spirit and scope of the present invention. Any equivalent changes or modifications resulting from the present invention are intended to be covered by the appended claims.

[0038]

Explanation of symbols

[0039] 100: Reflective Structure

[0040] 10: Reflective sheet

[0041] 11: Overlapping area

[0042] 12: End angle

[0043] 13: Notch

[0044] 14: Opening

[0045] 20: Positioning gap

[0046] 30: Support

[0047] 40: Light board

[0048] 41: Light-emitting element

[0049] 42: Colloid

[0050] 50: Optical film

[0051] 60: Display panel

[0052] 70: Back panel

[0053] D1: First spacing

[0054] D2: Second spacing.

Claims

1. A reflective structure, formed by splicing at least two reflective sheets, each of which has an overlapping area, and at least one end corner of the overlapping area has a notch; in, Two adjacent reflection sheets overlap each other with the two overlapping areas, and the two notches of the two adjacent reflection sheets are connected to form a positioning notch. The reflective structure as claimed in claim 1 , wherein the notch is arc-shaped. The reflective structure as claimed in claim 1 , wherein the reflective sheet is polygonal. The reflective structure as claimed in claim 1 , wherein the reflective sheet is fan-shaped.

5. A backlight module, comprising: The reflective structure according to any one of claims 1 to 4; A light panel, the light panel being located below the reflective structure; A support member extends through the reflective structure, and the positioning notch surrounds the support member; and At least one optical film is supported by the supporting member. 6 . The backlight module as claimed in claim 5 , wherein the number of the reflective sheets is four, the notches of the four reflective sheets are connected to form the positioning notch, and the positioning notch is circular. 7 . The backlight module as claimed in claim 5 , wherein the positioning notch and the supporting member have a first distance therebetween.

8. The backlight module as claimed in claim 7, wherein the light panel comprises a plurality of light emitting elements; in, Each of the reflective sheets has a plurality of openings, which are spaced apart on each of the reflective sheets. The plurality of openings accommodate at least one of the plurality of light-emitting elements. Each of the openings has a second spacing with the light-emitting element, and the second spacing is greater than the first spacing.

9. A display device, comprising: The backlight module as claimed in claims 5 to 8; and The display panel is arranged in front of the backlight module.

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