Vehicle-mounted backlight module for improving display effect and vehicle-mounted display device

Abstract

The utility model provides a vehicle-mounted backlight module with improved display effect, which comprises a lower frame, a reflecting film, a light guide plate, an optical film and a light bar, the reflecting film is arranged in the lower frame, the light guide plate is arranged on the reflecting film, the optical film is arranged on the light guide plate, the light bar is fixedly connected to the inner wall of the lower frame, and the light bar is fixedly connected to the inner wall of the lower frame. The light bar is fixedly connected with at least two limiting blocks, and each limiting block makes contact with or abuts against the light guide plate. The vehicle-mounted backlight module capable of improving the display effect can solve the problem that in the prior art, a boss of a light guide plate is broken, the display dark area is improved, and the display effect is 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 vehicle-mounted backlight module and a vehicle-mounted display device for improving display effects. Background Art

[0002] The use of display screens in an intelligent society is becoming increasingly widespread. With the increasing adoption of electric vehicles and autonomous driving, demand for in-vehicle electronic products (such as central control displays, instrument panels, rearview mirrors, and armrest screens) has steadily increased. Consequently, more backlight manufacturers from other fields (such as mobile phones, tablets, computers, and TVs) have entered the automotive backlight industry, leading to higher standards for backlight module (BMU) noise and light guide plate (LGP) column fracture. Preventing abnormal BMU noise is receiving increasing attention from backlight module manufacturers, and the requirements are becoming increasingly stringent.

[0003] like Figure 1 As shown, the traditional backlight module includes a lower frame 21, a reflective film, a light guide plate 22 and a light bar 23. The reflective film and the light guide plate 22 are arranged in the lower frame 21, and the light bar 23 is fixedly connected to the inner wall of the lower frame 21. The light guide plate 22 is fixedly connected to the side close to the light bar 23 with an anti-collision boss 221. The anti-collision boss 221 of the light guide plate 22 is against the FPCA. Since the anti-collision boss 221 is a plastic part, during the three-in-one vehicle-mounted vibration test, the anti-collision boss 221 has a risk of vibration fracture. Moreover, because the light guide plate 22 is designed with the anti-collision boss 221, the LED lamp must be designed with a certain safety distance from the anti-collision boss 221 of the light guide plate 22. Therefore, the LED lamp will be designed closer to the display area, resulting in a dark area at the top corner of the light incident side of the backlight module, and its display effect is poor, affecting the customer's usage experience. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a vehicle-mounted backlight module with improved display effect, which can solve the problem of broken bosses of light guide plates in the prior art, improve the display dark area, and enhance the display effect.

[0005] The utility model provides a vehicle-mounted backlight module for improving display effects, comprising a lower frame, a reflective film, a light guide plate, an optical film and a light bar, wherein the reflective film is arranged in the lower frame, the light guide plate is arranged on the reflective film, the optical film is arranged on the light guide plate, the light bar is fixedly connected to the inner wall of the lower frame, and the light bar is fixedly connected to at least two limit blocks, each of which is in contact with or abuts against the light guide plate.

[0006] In one embodiment, the light bar includes a flexible circuit board and a plurality of LED lights electrically connected to the flexible circuit board, and the limit blocks are fixedly connected to the flexible circuit board, and the limit blocks are arranged at both ends of the flexible circuit board.

[0007] In one embodiment, the limit blocks are respectively the first limit block and the second limit block, defining the two LED lamps at one end of the flexible circuit board as the first lamp bead and the second lamp bead, and the two LED lamps at the other end of the flexible circuit board as the third lamp bead and the fourth lamp bead, the first limit block is arranged between the first lamp bead and the second lamp bead, and the second limit block is arranged between the third lamp bead and the fourth lamp bead.

[0008] In one embodiment, the length of the limit block is 0.5 mm to 1.5 mm.

[0009] In one embodiment, the distance between the limiting block and the light guide plate is greater than the distance between the LED lamp and the light guide plate.

[0010] In one embodiment, the limiting block is a copper block.

[0011] In one embodiment, a buffer layer is fixedly connected to the surface of the limiting block, and the buffer layer is used to buffer the light guide plate.

[0012] In one embodiment, the optical film includes a diffusion film, a light enhancement film and a brightness enhancement film, the diffusion film is connected to the light guide plate, the light enhancement film is connected to the diffusion film, and the brightness enhancement film is connected to the brightness enhancement film.

[0013] In one embodiment, the vehicle-mounted backlight module for improving display effects further includes foam adhesive, and the foam adhesive is used to connect the display screen to the lower frame.

[0014] The utility model also relates to a vehicle-mounted display device, comprising the above-mentioned vehicle-mounted backlight module for improving display effects.

[0015] The light bar of the vehicle-mounted backlight module of the present invention is fixedly connected to a limiting block, and the limiting block abuts against or contacts the light guide plate to limit the light guide plate, which can not only prevent the light guide plate from contacting the LED lamp, but also prevent abnormal noise caused by vibration. In addition, the limiting block is fixed on the light bar to avoid the breakage of the anti-collision boss of the light guide plate in the prior art, avoid the occurrence of dark areas, and improve the display effect and customer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention 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 any creative work.

[0017] Figure 1It is a schematic diagram of a partial top view of the backlight module in the prior art.

[0018] Figure 2 It is a partial top view structural diagram of the vehicle-mounted backlight module of the present invention.

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the vehicle-mounted backlight module of the present utility model.

[0020] Explanation of the accompanying reference numerals: lower frame 11; light bar 12; flexible circuit board 121; first limit block 122; first lamp bead 123; reflective film 13; light guide plate 14; optical film 15; diffusion film 151; brightness enhancement film 152; brightness enhancement film 153.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0023] In the description of this utility model, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0024] 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 and simplification of 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. Therefore, they should not be understood as limitations on the utility model.

[0025] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0026] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0027] like Figure 2 and Figure 3 As shown, the vehicle-mounted backlight module for improving the display effect includes a lower frame 11, a reflective film 13, a light guide plate 14, an optical film 15 and a light bar 12. The reflective film 13 is arranged in the lower frame 11, the light guide plate 14 is arranged on the reflective film 13, the optical film 15 is arranged on the light guide plate 14, and the light bar 12 is fixedly connected to the inner wall of the lower frame 11. The light bar 12 is fixedly connected with at least two limit blocks, and each limit block is in contact with or abuts against the light guide plate 14. In this embodiment, the lower frame 11 is a die-casting, and the light bar 12 is fixedly connected to the inner wall of the lower frame 11 by a thermally conductive double-sided tape.

[0028] The light bar 12 of the vehicle-mounted backlight module of the present invention is fixedly connected to the limiting block, and the limiting block abuts against or contacts the light guide plate 14 to limit the light guide plate 14, which can not only prevent the light guide plate 14 from contacting the LED lamp, but also prevent abnormal noise caused by vibration. In addition, the limiting block is fixed on the light bar 12 to avoid the breakage of the anti-collision boss of the light guide plate 14 in the prior art, avoid the occurrence of dark areas, and improve the display effect and customer experience.

[0029] Preferably, the light strip 12 includes a flexible circuit board 121 and a plurality of LED lights electrically connected to the flexible circuit board 121. The limit blocks are fixedly connected to the flexible circuit board 121, and the limit blocks are arranged at both ends of the flexible circuit board 121. The limit blocks are copper blocks, which are connected to the flexible circuit board 121 by welding to increase the anti-collision strength between the light guide plate 14 and the light bar 12. The distance between the limit block and the light guide plate 14 is greater than the distance between the LED light and the light guide plate 14. The length of the limit block is 0.5mm~1.5mm, preferably 0.5mm, 1mm or 1.5mm, etc. The width of the limit block is 0.5mm~1.5mm, preferably 0.5mm, 1mm or 1.5mm, etc.

[0030] Preferably, the limit blocks are respectively a first limit block 122 and a second limit block, defining the two LED lamps at one end of the flexible circuit board 121 as the first lamp bead 123 and the second lamp bead, and the two LED lamps at the other end of the flexible circuit board 121 as the third lamp bead and the fourth lamp bead, and the first limit block 122 is arranged between the first lamp bead 123 and the second lamp bead, and the second limit block is arranged between the third lamp bead and the fourth lamp bead. Therefore, based on the above structure, the first lamp bead 123 and the third lamp bead can be arranged closer to the edges of both ends of the flexible circuit board 121, thereby avoiding the phenomenon of dark areas in the corners and improving the display effect.

[0031] In another preferred embodiment, a buffer layer is fixedly connected to the surface of the limiting block, and the buffer layer is used to buffer the light guide plate 14 to prevent the limiting block from scratching the light guide plate 14.

[0032] Preferably, the optical film 15 includes a diffusion film 151, a brightness enhancement film 152, and a brightness enhancement film 153. The diffusion film 151 is connected to the light guide plate 14, the brightness enhancement film 152 is connected to the diffusion film 151, and the brightness enhancement film 153 is connected to the brightness enhancement film 153. The diffusion film 151, the brightness enhancement film 152, and the brightness enhancement film 153 can be fixedly connected by double-sided tape.

[0033] Preferably, the vehicle-mounted backlight module for improving display effects further includes foam adhesive, which is used to connect the display screen to the lower frame 11 and to cushion and fix the display screen.

[0034] The present invention also relates to an in-vehicle display device, including the aforementioned in-vehicle backlight module for improving display effects. Examples of in-vehicle display devices include, but are not limited to, high-end in-vehicle instruments, in-vehicle central control displays, in-vehicle driving recorders, in-vehicle DVD navigation systems, in-vehicle integrated dashboard displays, in-vehicle streaming media rearview mirrors, automotive headrest displays, or industrial control and medical equipment.

[0035] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model shall be based on the appended claims.

Claims

1. A vehicle-mounted backlight module for improving display effects, characterized in that: The invention comprises a lower frame (11), a reflective film (13), a light guide plate (14), an optical film (15) and a light bar (12); the reflective film (13) is arranged in the lower frame (11); the light guide plate (14) is arranged on the reflective film (13); the optical film (15) is arranged on the light guide plate (14); the light bar (12) is fixedly connected to the inner wall of the lower frame (11); the light bar (12) is fixedly connected to at least two limit blocks, and each limit block contacts or abuts against the light guide plate (14).

2. The vehicle-mounted backlight module for improving display effect according to claim 1, wherein: The light bar (12) comprises a flexible circuit board (121) and a plurality of LED lights electrically connected to the flexible circuit board (121); the limit blocks are fixedly connected to the flexible circuit board (121); and the limit blocks are arranged at both ends of the flexible circuit board (121).

3. The vehicle-mounted backlight module for improving display effect according to claim 2, wherein: The limiting blocks are respectively a first limiting block (122) and a second limiting block, and the two LED lamps at one end of the flexible circuit board (121) are respectively a first lamp bead (123) and a second lamp bead, and the two LED lamps at the other end of the flexible circuit board (121) are respectively a third lamp bead and a fourth lamp bead, the first limiting block (122) is arranged between the first lamp bead (123) and the second lamp bead, and the second limiting block is arranged between the third lamp bead and the fourth lamp bead.

4. The vehicle-mounted backlight module for improving display effect according to claim 1, wherein: The length of the limit block is 0.5mm to 1.5mm.

5. The vehicle-mounted backlight module for improving display effect according to claim 2, wherein: The distance between the limiting block and the light guide plate (14) is greater than the distance between the LED lamp and the light guide plate (14).

6. The vehicle-mounted backlight module for improving display effect according to any one of claims 1 to 5, characterized in that: The limiting block is a copper block.

7. The vehicle-mounted backlight module for improving display effect according to claim 6, wherein: A buffer layer is fixedly connected to the surface of the limit block, and the buffer layer is used to buffer the light guide plate (14).

8. The vehicle-mounted backlight module for improving display effect according to claim 1, wherein: The optical film (15) comprises a diffusion film (151), a light-enhancing film (152) and a brightness-enhancing film (153); the diffusion film (151) is connected to the light guide plate (14); the light-enhancing film (152) is connected to the diffusion film (151); and the brightness-enhancing film (153) is connected to the brightness-enhancing film (153).

9. The vehicle-mounted backlight module for improving display effect according to claim 1, wherein: The vehicle-mounted backlight module for improving display effects further comprises foam adhesive, and the foam adhesive is used to connect the display screen to the lower frame (11).

10. A vehicle-mounted display device, characterized in that: A vehicle-mounted backlight module with improved display effect comprising the device described in any one of claims 1 to 9.

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