Foreign matter preventing backlight module without middle frame and vehicle-mounted display device

Abstract

The middle-frame-free backlight module capable of preventing the foreign matter comprises a lower frame, a reflecting film, a light guide plate, an optical film and a first adhesive tape, the lower frame comprises a bottom plate and a side frame fixedly connected with the bottom plate, a containing cavity is formed between the bottom plate and the side frame, and the reflecting film is arranged in the containing cavity. The reflecting film, the light guide plate and the optical film are arranged in the containing cavity, the first adhesive tape is connected to the inner wall of the side frame, the first adhesive tape is of a double-faced adhesive tape structure, and the first adhesive tape is used for adhering foreign matter entering the containing cavity. According to the middle-frame-free backlight module capable of preventing the foreign matter, the foreign matter can be prevented from appearing in the containing cavity of the backlight module, and the quality and the display effect of the backlight module are improved. The utility model further relates to a vehicle-mounted display device.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to a frameless backlight module and a vehicle-mounted display device for preventing foreign matter. Background Art

[0002] In recent years, with the continuous improvement of people's awareness of driving safety, car displays have developed rapidly in the field of automotive electronics. It can provide real-time monitoring and display of the environment outside the car for drivers and passengers, provide protection for safe driving, and has become one of the indispensable equipment for traffic safety. Automobile manufacturers have higher and higher requirements for the quality of car displays, and at the same time, they have also put forward higher requirements for the visual effects and foreign matter control of car displays.

[0003] The die-cast parts of traditional frameless automotive backlight sources have no double-sided tape on the inner side. Dust or foreign matter can easily enter the gap between the light guide plate and the lower frame during vibration of the backlight module. In addition, magnesium and aluminum chips and foreign matter in the shrinkage groove of the lower frame can easily run to the inside of the backlight module during vibration and enter the display with the vibration of the backlight module, thus affecting the display effect and quality of the backlight module. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a frameless backlight module that prevents foreign matter from entering. The backlight module can solve the problems existing in the prior art, avoid the appearance of foreign matter in the accommodating cavity of the backlight module, and improve the quality and display effect of the backlight module.

[0005] The utility model provides a frameless backlight module for preventing foreign objects, comprising a lower frame, a reflective film, a light guide plate, an optical film and a first adhesive tape, wherein the lower frame comprises a bottom plate and a side frame fixedly connected to the bottom plate, a receiving cavity is formed between the bottom plate and the side frame, the reflective film, the light guide plate and the optical film are arranged in the receiving cavity, the first adhesive tape is connected to the inner wall of the side frame, the first adhesive tape is a double-sided adhesive tape structure, and the first adhesive tape is used to adhere to foreign objects entering the receiving cavity.

[0006] In one embodiment, the side frame includes a first side wall, a second side wall and a third side wall, a fourth side wall that are oppositely arranged, the first side wall and the second side wall are fixedly connected to the third side wall and the fourth side wall, and the first tape is connected to the first side wall, the second side wall, the third side wall and the fourth side wall.

[0007] In one embodiment, the first adhesive tape is an integral structure; or the first adhesive tape includes a first adhesive segment, a second adhesive segment, a third adhesive segment and a fourth adhesive segment, the first adhesive segment is connected to the first side wall, the second adhesive segment is connected to the second side wall, the third adhesive segment is connected to the third side wall, and the fourth adhesive segment is connected to the fourth side wall.

[0008] In one embodiment, the bottom plate is provided with a plurality of cutouts, and the frameless backlight module for preventing foreign matter comprises a second adhesive tape, and the second adhesive tape covers the cutouts.

[0009] In one embodiment, the bottom plate is provided with at least two fixing holes, and the frameless backlight module for preventing foreign matter includes at least two third adhesive tapes, and each of the third adhesive tapes covers each of the fixing holes.

[0010] In one embodiment, the first adhesive tape, the second adhesive tape and the third adhesive tape are respectively disposed in the accommodating cavity.

[0011] In one embodiment, the optical film comprises a diffusion film, a light enhancement film and a brightness enhancement film, the diffusion film is arranged on the light guide plate, the light enhancement film is arranged on the diffusion film, and the brightness enhancement film is arranged on the light enhancement film.

[0012] In one embodiment, the frameless backlight module for preventing foreign matter further includes a light bar, wherein the light bar is disposed in the accommodating cavity and connected to the side frame.

[0013] In one embodiment, the frameless backlight module for preventing foreign objects further includes foam glue, which is connected to an end of the side frame away from the bottom plate, and is used for buffering and fixing the display screen.

[0014] The utility model also relates to a vehicle-mounted display device, comprising the above-mentioned middle frameless backlight module for preventing foreign matter.

[0015] The backlight module of the utility model is provided with a first adhesive tape in the accommodating cavity of the lower frame, and the first adhesive tape is attached to the inner wall of the side frame. The first adhesive tape is a double-sided adhesive structure. Therefore, when the backlight module is in use, the first adhesive tape can stick to foreign matter between the gap between the light guide plate and the lower frame during the vibration of the backlight module, thereby preventing foreign matter from entering the display area and improving the display effect and quality of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the lower frame of the backlight module of the utility model.

[0018] Explanation of the accompanying reference numerals: accommodating cavity 101; material removal groove 102; fixing hole 103; lower frame 11; bottom plate 111; side frame 112; first side wall 1121; second side wall 1122; third side wall 1123; fourth side wall 1124; partition plate 113; first adhesive tape 121; second adhesive tape 122; third adhesive tape 123.

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0023] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0024] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0025] like Figure 1 As shown, the frameless backlight module for preventing foreign objects includes a lower frame 11, a reflective film, a light guide plate, an optical film and a first tape 121. The lower frame 11 includes a bottom plate 111 and a side frame 112 fixedly connected to the bottom plate 111. A receiving cavity 101 is formed between the bottom plate 111 and the side frame 112. The reflective film, the light guide plate and the optical film are arranged in the receiving cavity 101. The first tape 121 is connected to the inner wall of the side frame 112. The first tape 121 is a double-sided tape structure. The first tape 121 is used to adhere foreign objects entering the receiving cavity 101. The frameless backlight module in this embodiment is a dual-screen structural design, and the lower frame 11 is preferably a die-casting. The lower frame 11 includes a partition 113, and the partition 113 is fixedly connected to the bottom plate 111 and the side frame 112. The partition 113 divides the accommodating cavity 101 into a first cavity and a second cavity, wherein the partition 113 is also adhered with a first tape 121 for adhering dust or foreign matter in the accommodating cavity 101.

[0026] The backlight module of the present invention is provided with a first adhesive tape 121 in the accommodating cavity 101 of the lower frame 11, and the first adhesive tape 121 is attached to the inner wall of the side frame 112. The first adhesive tape 121 is a double-sided adhesive structure. Therefore, when the backlight module is in use, the first adhesive tape 121 can stick to foreign matter between the gap between the light guide plate and the lower frame 11 during the vibration of the backlight module, thereby preventing foreign matter from entering the display area, thereby improving the display effect and quality of the backlight module.

[0027] Preferably, the side frame 112 includes a first side wall 1121, a second side wall 1122 and a third side wall 1123, and a fourth side wall 1124 that are relatively arranged. The first side wall 1121 and the second side wall 1122 are fixedly connected to the third side wall 1123, and the fourth side wall 1124. The first adhesive tape 121 is connected to the first side wall 1121, the second side wall 1122, the third side wall 1123 and the fourth side wall 1124. The first adhesive tape 121 includes a first adhesive segment, a second adhesive segment, a third adhesive segment and a fourth adhesive segment. The first adhesive segment is connected to the first side wall 1121, the second adhesive segment is connected to the second side wall 1122, the third adhesive segment is connected to the third side wall 1123, and the fourth adhesive segment is connected to the fourth side wall 1124. In this embodiment, the partition plate 113 divides the first side wall 1121 into a first sub-wall and a second sub-wall, and the first sub-wall and the second sub-wall are respectively connected with a first rubber segment; the partition plate 113 divides the second side wall 1122 into a third sub-wall and a fourth sub-wall, and the third sub-wall and the fourth sub-wall are respectively connected with a second rubber segment.

[0028] In other embodiments, the first adhesive tape 121 is an integral structure, and two first adhesive tapes 121 are provided, wherein one first adhesive tape 121 is provided in the first cavity and adheres to all side walls in the first cavity, and the other first adhesive tape 121 is provided in the second cavity and adheres to all side walls in the second cavity.

[0029] Preferably, the bottom plate 111 is provided with a plurality of material grooves 102. The material grooves 102 can prevent the lower frame 11 from shrinking during the manufacturing process and affecting the use. The frameless backlight module for preventing foreign matter includes a second tape 122, and the second tape 122 covers the material grooves 102. The second tape 122 is preferably a single-sided tape, and the second tape 122 is used to cover the material grooves 102 to seal foreign matter in the material grooves 102 to prevent foreign matter in the material grooves 102 from entering the display area.

[0030] Preferably, the bottom plate 111 is provided with at least two fixing holes 103, and the fixing holes 103 are holes used to fix the lower frame 11 on the processing equipment when the lower frame 11 is subjected to CNC processing, so as to ensure that the size of the lower frame 11 meets the requirements when the lower frame 11 is subjected to CNC processing, and the middle frameless backlight module for preventing foreign matter includes at least two third tapes 123, and each third tape 123 is respectively provided to cover each fixing hole 103, and the third tape 123 is preferably a single-sided tape. Sealing the fixing hole 103 with the third tape 123 can prevent foreign matter or debris such as dust outside the accommodating cavity 101 from entering the accommodating cavity 101.

[0031] Preferably, the first tape 121 , the second tape 122 and the third tape 123 are respectively disposed in the accommodating cavity 101 to adhere to dust or foreign matter to prevent the dust or foreign matter from entering the display area to affect the display effect of the backlight module.

[0032] Preferably, the optical film includes a diffusion film, a light enhancement film and a brightness enhancement film, wherein the diffusion film is arranged on the light guide plate, the light enhancement film is arranged on the diffusion film, and the brightness enhancement film is arranged on the brightness enhancement film. The diffusion film is fixedly connected to the light guide plate by double-sided adhesive tape, and the diffusion film, the light enhancement film and the brightness enhancement film can be fixedly connected by double-sided adhesive tape. Alternatively, the film can be positioned by means of a card block and a card slot, and then fixed by double-sided adhesive tape to increase the firmness of the connection between the films.

[0033] Preferably, the frameless backlight module for preventing foreign matter further includes a light bar, which is disposed in the accommodating cavity 101 and connected to the side frame 112. In this embodiment, the light bar includes a flexible circuit board and a plurality of LED lights, which are electrically connected to the flexible circuit board, and each LED light is disposed along the length direction of the flexible circuit board, and the flexible circuit board is fixedly connected to the inner wall of the side frame 112, i.e., the light incident side of the side frame 112, by means of a heat-conducting double-sided adhesive.

[0034] Preferably, the frameless backlight module for preventing foreign matter further includes foam glue, which is connected to one end of the side frame 112 away from the bottom plate 111 , and is used for buffering and fixing the display screen.

[0035] The utility model also relates to a vehicle display device, including the above-mentioned frameless backlight module for preventing foreign matter. The vehicle display device of the utility model is, for example, a high-end vehicle instrument, a vehicle central control display, a vehicle driving recorder, a vehicle DVD navigation, etc., but is not limited thereto.

[0036] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A frameless backlight module for preventing foreign matter, characterized in that: The invention comprises a lower frame (11), a reflective film, a light guide plate, an optical film and a first adhesive tape (121); the lower frame (11) comprises a bottom plate (111) and a side frame (112) fixedly connected to the bottom plate (111); a receiving cavity (101) is formed between the bottom plate (111) and the side frame (112); the reflective film, the light guide plate and the optical film are arranged in the receiving cavity (101); the first adhesive tape (121) is connected to the inner wall of the side frame (112); the first adhesive tape (121) is a double-sided adhesive tape structure; the first adhesive tape (121) is used to adhere foreign matter entering the receiving cavity (101).

2. The frameless backlight module for preventing foreign matter according to claim 1, characterized in that: The side frame (112) comprises a first side wall (1121), a second side wall (1122) which are arranged opposite to each other, and a third side wall (1123), and a fourth side wall (1124) which are arranged opposite to each other; the first side wall (1121) and the second side wall (1122) are fixedly connected to the third side wall (1123) and the fourth side wall (1124); and the first adhesive tape (121) is connected to the first side wall (1121), the second side wall (1122), the third side wall (1123) and the fourth side wall (1124).

3. The frameless backlight module for preventing foreign matter according to claim 2, characterized in that: The first adhesive tape (121) is an integral structure; or the first adhesive tape (121) comprises a first adhesive segment, a second adhesive segment, a third adhesive segment and a fourth adhesive segment, the first adhesive segment is connected to the first side wall (1121), the second adhesive segment is connected to the second side wall (1122), the third adhesive segment is connected to the third side wall (1123), and the fourth adhesive segment is connected to the fourth side wall (1124).

4. The frameless backlight module for preventing foreign matter according to claim 3, characterized in that: The bottom plate (111) is provided with a plurality of cutout grooves (102), and the frameless backlight module for preventing foreign matter comprises a second adhesive tape (122), and the second adhesive tape (122) is arranged to cover the cutout grooves (102).

5. The frameless backlight module for preventing foreign matter according to claim 4, characterized in that: The bottom plate (111) is provided with at least two fixing holes (103), and the frameless backlight module for preventing foreign matter comprises at least two third adhesive tapes (123), and each of the third adhesive tapes (123) is arranged to cover each of the fixing holes (103).

6. The frameless backlight module for preventing foreign matter according to claim 5, characterized in that: The first adhesive tape (121), the second adhesive tape (122), and the third adhesive tape (123) are respectively arranged in the accommodating cavity (101).

7. The frameless backlight module for preventing foreign matter as claimed in claim 3, characterized in that: The optical film comprises a diffusion film, a light enhancement film and a brightness enhancement film. The diffusion film is arranged on the light guide plate, the light enhancement film is arranged on the diffusion film, and the brightness enhancement film is arranged on the light enhancement film.

8. The frameless backlight module for preventing foreign matter as claimed in claim 3, characterized in that: The frameless backlight module for preventing foreign matter also includes a light bar, which is arranged in the accommodating cavity (101) and connected to the side frame (112).

9. The frameless backlight module for preventing foreign matter as claimed in claim 3, characterized in that: The frameless backlight module for preventing foreign matter also includes foam glue, which is connected to an end of the side frame (112) away from the bottom plate (111), and is used for buffering and fixing the display screen.

10. A vehicle-mounted display device, characterized in that: A frameless backlight module for preventing foreign matter as claimed in any one of claims 1 to 9.

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