Reflection structure with overlapped areas overlapped mutually, backlight module and display device

Abstract

The utility model relates to a reflection structure with overlapped areas overlapped mutually, a backlight module and a display device. The reflection structure is formed by splicing at least two reflection sheets, each reflection sheet is provided with a superposition area, and at least one end corner of the superposition area is provided with a notch; wherein the two adjacent reflector plates are overlapped with each other through the two overlapping areas, and the two notches of the two adjacent reflector plates are connected to form a positioning notch.

Description

Technical Field

[0001] The utility model relates to a reflection structure, in particular to a reflection structure applied to a narrow-frame backlight module and overlapped with each other in overlapping areas. Background Art

[0002] At present, in response to the design requirements of use, backlight modules and display devices will try to design the backlight modules close to the frame as much as possible. The narrower the frame, the closer it can be to the side wall, making the screen display range larger. Therefore, the LED distribution in the backlight module must be very close to the side wall, so there is no space between the LED and the side wall for positioning the reflector. This may cause the reflector position to have an offset error when it is attached to the lamp board, or when the backlight module is at high or low temperatures, the LED in the backlight module causes uneven heating of the whole, resulting in local temperature differences, which in turn causes the reflector to expand and contract locally and interfere with the light-emitting element. The reflector is also deformed, dislocated or squeezed other structures, etc., and the lighting appearance is abnormal, causing the uniformity of the light-emitting surface of the backlight module to deteriorate, and even the backlight module malfunctions.

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

[0004] The utility model aims to provide a positioning 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 notch, which can achieve the purpose of ensuring the optical quality of the backlight module.

[0005] The second object of the present invention is to provide a backlight module and a display device that are matched with the above-mentioned positionable reflective structure, which can avoid the local expansion and contraction of the reflective sheet causing the reflective sheet to be uneven, thereby achieving the purpose of maintaining light uniformity and ensuring optical quality.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a reflective structure, which is spliced ​​together by 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; 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.

[0007] The utility model provides a backlight module, comprising: a reflective structure as mentioned above; a light board, the light board is located below the reflective structure; a support member, extending through the reflective structure, the positioning notch surrounds the support member; and at least one optical film, supported by the support member.

[0008] The utility model further provides a display device, comprising: the aforementioned backlight module; and a display panel, which is arranged in front of the backlight module.

[0009] In some embodiments, the notch is arc-shaped.

[0010] In some embodiments, the reflective sheet is polygonal.

[0011] In some embodiments, the reflective sheet is fan-shaped.

[0012] 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.

[0013] In some embodiments, the positioning notch and the support member have a first distance therebetween.

[0014] 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, each of the openings has a second spacing with the light-emitting element, and the second spacing is greater than the first spacing.

[0015] The utility model has a reflective structure with overlapping regions, comprising at least two reflective sheets with notches, and each reflective sheet uses the notches at its end angles to abut against a support member located between the reflective sheets, thereby achieving the purpose of ensuring the optical quality of the backlight module.

[0016] The utility model also provides a backlight module and a display device matched with the above-mentioned reflective structure with overlapping areas, which 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 the reflective sheet to be uneven, thereby achieving the purpose of maintaining light uniformity and optical taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a reflective sheet of the utility model.

[0018] Figure 2 It is a schematic diagram of the reflection structure of the utility model.

[0019] Figure 3 It is a partially enlarged schematic diagram of the reflective structure of the utility model.

[0020] Figure 4It is a schematic diagram of the backlight module of the utility model.

[0021] Figure 5 It is a partially enlarged schematic diagram of the backlight module of the utility model.

[0022] Figure 6 It is a partially enlarged top view of the backlight module of the utility model.

[0023] Figure 7 It is a side cross-sectional schematic diagram of the display device of the present utility model. DETAILED DESCRIPTION

[0024] Now, the embodiments of the present invention are described in detail with reference to the drawings as follows. The drawings are mainly simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, only elements related to the present invention are marked in these drawings, and the displayed elements are not drawn in terms of the number, shape, size ratio, etc. during implementation. The specifications and dimensions during actual implementation are actually a selective design, and the element layout may be more complicated.

[0025] The following descriptions of the embodiments are made with reference to the attached drawings to illustrate specific embodiments on which the present invention can be implemented. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In addition, in the specification, unless explicitly described to the contrary, the word "comprising" will be understood to mean including the elements described, but not excluding any other elements.

[0026] See also Figures 1 to 3As shown, it is a preferred embodiment of the reflective structure 100 of the utility model. The reflective structure 100 is formed by splicing at least two reflective sheets 10. The reflective sheets 10 can be polygonal or fan-shaped, but not limited to this. Each reflective sheet 10 has an overlapping area 11. The overlapping areas 11 are distributed around the periphery of the reflective sheet 10. At least one end corner 12 of the overlapping area 11 has a notch 13. The notch 13 can be arc-shaped or polygonal, but not limited to this. Two adjacent reflective sheets 10 overlap each other with the two overlapping areas 11, and the two notches 13 of the two adjacent reflective sheets 10 are connected to form a positioning notch 20. Since the reflector sheet 10 will expand and contract due to temperature, the reflector sheet 10 is split into several pieces and then spliced ​​into a reflective structure 100, so that the expansion and contraction amplitude of the split smaller reflector sheet 10 will be smaller than that of the original size reflector sheet 10, so that the overall expansion and contraction size space can also be dispersed. When the reflector sheet 10 is split and then spliced, the risk of dark shadows on the light appearance at the joints must be avoided, so the reflector sheets 10 will overlap each other at the joints to ensure the consistency of light reflectivity. The notch 13 is designed at the end corner 12 of the overlapping area 11 of the reflector sheet 10, so that when the reflector sheet 10 is overlapped with each other, the positioning notch 20 formed by the two notches 13 after the overlap can be used to assemble and position with other fixed components in the backlight module, for example, the support member 30 used to carry optical components and located between the reflector sheets 10. Preferably, the shape of the notch 13 of the reflector sheet 10 corresponds to the contour of the aligned support member 30. In summary, the reflective structure 100 of the present invention can be aligned with the fixed components of the backlight module. It can not only utilize the mobility of the reflective structure 100 relative to the backlight module to avoid the unevenness caused by the expansion and contraction of the reflective sheet 10, but also ensure the consistency of the light reflectivity of the entire reflective sheet 10 through the overlapping area 11 of adjacent reflective sheets 10, thereby achieving the effect of maintaining the optical quality of the backlight module.

[0027] See also Figures 2 to 3 As shown, in this embodiment, the reflector 10 is rectangular, and the notch 13 at the end corner 12 of the reflector 10 is arc-shaped, so the notch 13 of the reflective structure 100 formed by overlapping two adjacent reflector sheets 10 will form a semicircular positioning notch 20. If four adjacent reflector sheets 10 are overlapped with each other, the notch 13 of the reflective structure 100 will form a circular positioning notch 20.

[0028] See also Figures 4 to 7As shown, it is a preferred embodiment of the backlight module of the utility model, comprising 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 sheet, but is not limited thereto. In this way, the support member 30 located at a relatively central position may be used as a positioning point for overlapping the boundaries of the reflective sheet 10 to prevent 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 utility model and the lamp board 40 may be further bonded with a colloid 42 to ensure the bonding stability of the reflective sheet 10.

[0029] In a backlight module embodiment with a larger area, the support member 30 is combined with the back plate 70 to prop up the optical film 50 to prevent the optical film 50 from sagging and being uneven. Therefore, it is preferred to set multiple support members 30 in a large-sized backlight module.

[0030] The utility model utilizes the positioning notch 20 of the reflective structure 100 to surround the periphery of the support member 30, so that the reflective sheet 10 can be positioned relative to the support member 30, which can prevent the reflective sheet 10 from being displaced and deformed after thermal expansion and contraction due to large changes in high and low temperatures, and can limit its expansion and displacement space between two adjacent support members 30. For example, the reflective sheet 10 in this embodiment is a quadrangle, and the notch 13 of the reflective sheet 10 is located at one of the corners of the quadrangle, so the notch 13 of each reflective sheet 10 is a quarter fan-shaped, and then spliced ​​into a circle. The quadrangular reflective sheet 10 of this embodiment can be applied to the support member 30 of a rectangular backlight module and a circular base, which is conducive to rapid splicing and assembly.

[0031] In another embodiment, the positioning notch 20 and the support member 30 have a first spacing D1. In this way, when the light is cold and shrinks, the overlapping area of ​​each reflector sheet 10 can ensure that the surface of the light board 40 will not be exposed, and when the light is hot and expands, the first spacing D1 can also have enough space to accommodate the expansion of the reflector sheet 10. Furthermore, the aforementioned circular positioning notch 20 is matched with the conical support member 30, so that the bottom surface shapes of the positioning notch 20 and the support member 30 can be matched, so that the shortest vertical distance between the positioning notch 20 and the support member 30, that is, the first spacing D1, is equidistant at every place, so that the support member 30 becomes the reference for the setting and positioning of the reflector sheet 10.

[0032] In another embodiment, the positioning notch 20 and the support member 30 have a first spacing D1, the light board 40 includes a plurality of light-emitting elements 41, each of the reflective sheets 10 has a plurality of openings 14, the openings 14 are arranged at intervals on each of the reflective sheets 10, and the openings 14 accommodate at least one of the light-emitting elements 41, and each of the openings 14 and the light-emitting element 41 have a second spacing D2, and the second spacing D2 is greater than the first spacing D1. Therefore, when the reflective sheet 10 begins to expand due to high temperature in the backlight module, the end edge of the reflective sheet 10 will first press against the side surface of the support member 30 with a smaller spacing, and the end edge of the opening 14 of the reflective sheet 10 is at a larger spacing from the light-emitting element 41, so that the reflective sheet 10 will not push the light-emitting element 41 due to thermal expansion, or even push and displace the light-emitting element 41, so that the light-emitting element 41 can remain at the originally set position, maintaining the uniform brightness of the backlight module as a whole.

[0033] The support member 30 is used as the positioning basis of the reflector 10, that is, there is no need to reserve space for setting up other positioning mechanisms for positioning the reflector 10, thus saving a lot of space between the backlight module and the side wall. In this way, the edge of the backlight module can be designed to be closer to the side wall to meet the requirement of a narrow frame.

[0034] See also Figure 7 As shown, it is a preferred embodiment of the display device of the present invention, comprising: a backlight module as mentioned above, and a display panel 60, wherein the display panel 60 is disposed in front of the backlight module.

[0035] As mentioned above, the backlight module and the display device of the present invention can adopt the reflective structure 100 of spliced ​​reflective sheets 10, and the end corner 12 of each reflective sheet 10 has at least one notch 13, and the notches 13 of two adjacent reflective sheets 10 form a positioning notch 20 in the overlapping area 11. The positioning notch 20 and the support member 30 in the backlight module have a first spacing D1, and a second spacing D2 is set between the edge of the opening 14 of the reflective sheet 10 and the light-emitting element 41. When the reflective sheet 10 is extended due to high temperature thermal expansion, the support member 30 becomes the top positioning member of the reflective sheet 10, so that the reflective sheet 10 can no longer continue to expand and extend, so the reflective sheet 10 will not push the light-emitting element 41 to affect the uniformity of the overall light emission, and the effect of positioning the reflective sheet 10 is also achieved.

[0036] The above disclosed embodiments are only illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of the present invention. Anyone skilled in the art may modify and alter the above embodiments without violating the spirit and scope of the present invention. Any equivalent changes and modifications made using the contents disclosed in the present invention shall still be covered by the attached claims.

[0037]

Explanation of symbols

[0038] 100: Reflective Structure

[0039] 10: Reflective sheet

[0040] 11: Overlapping area

[0041] 12: End angle

[0042] 13: Notch

[0043] 14: Opening

[0044] 20: Positioning gap

[0045] 30: Support

[0046] 40: Light board

[0047] 41: Light-emitting element

[0048] 42: Colloid

[0049] 50: Optical film

[0050] 60: Display Panel

[0051] 70: Back panel

[0052] D1: First spacing

[0053] D2: The second spacing.

Claims

1. A reflective structure with overlapping regions overlapping each other, characterized in that: It is 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; The 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.

2. The reflective structure with overlapping regions as claimed in claim 1, characterized in that: The notch is arc-shaped.

3. The reflective structure with overlapping regions as claimed in claim 1, characterized in that: The reflective sheet is polygonal.

4. The reflective structure with overlapping regions as claimed in claim 1, characterized in that: The reflective sheet is fan-shaped.

5. A backlight module, characterized in that: Include: A reflective structure with overlapping regions overlapping each other as claimed in any one of claims 1 to 4; A light panel, the light panel being located below the reflective structures overlapped with each other in overlapping areas; A support member extends through the reflective structures overlapped with each other in the overlapped area, and the positioning notch surrounds the support member; and At least one optical film is supported by the supporting member.

6. The backlight module according to claim 5, characterized in that: The number of the reflective sheets is four, and the notches of the four reflective sheets are connected to form the positioning notch, which is circular.

7. The backlight module according to claim 5, characterized in that: A first distance exists between the positioning notch and the supporting member.

8. The backlight module as claimed in claim 7, characterized in that: The light panel includes a plurality of light-emitting elements; Each of the reflective sheets has a plurality of openings, and the plurality of openings are spaced apart from 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, characterized in that: Include: The backlight module according to any one of claims 5 to 8; and The display panel is arranged in front of the backlight module.

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