Backlight module mounting structure for vehicle-mounted rearview mirror

Abstract

The backlight module installation structure for the vehicle-mounted rearview mirror comprises a metal rear shell and a backlight module, the metal rear shell comprises a rear side wall, an upper side wall, a right side wall, a lower side wall and a left side wall, the upper side wall, the right side wall, the lower side wall and the left side wall are arranged on the front side of the rear side wall and connected in sequence, and a first soft cushion is arranged on the left side wall and / or the right side wall; the backlight module comprises a light bar, a light intensifying assembly, a light guide plate, a reflecting film and a foam rubber mat, the light bar adheres to the upper side wall through heat conduction glue, second soft cushions are arranged at the two ends of the light bar, and the foam rubber mat, the reflecting film, the light guide plate and the light intensifying assembly are sequentially stacked in the containing groove from back to front and abut against the first soft cushions and the second soft cushions. And avoiding grooves are formed in the positions, corresponding to the lamp beads, of the light intensifying assembly and the light guide plate, gaps are formed between the lamp beads and the avoiding grooves, and a plurality of anti-wrinkle holes are formed in the positions, corresponding to the avoiding grooves, of the reflecting film at intervals in the extending direction of the lamp strip. The production cost is reduced, the overall weight is reduced, and the display effect of the display screen is prevented from being affected by thermal expansion.

Description

Technical Field

[0001] The utility model relates to the field of vehicle-mounted rearview mirror technology, in particular to a backlight module installation structure for a vehicle-mounted rearview mirror. Background Art

[0002] In the prior art, a vehicle rearview mirror includes a shell, a display screen and a backlight module. The shell includes a rear shell, which is provided with a receiving groove for installing the backlight module. The backlight module is arranged in the receiving groove. The backlight module includes a reflective film, a light guide plate, a diffusion film, a rear light-enhancing film, a front light-enhancing film and a DBEF film stacked in sequence from back to front. Due to structural requirements, the front end of the DBEF film needs to be flush with the notch of the receiving groove. Therefore, there is a structure that increases the thickness of the rear side wall of the rear shell. Under this structure, the weight of the rear shell is increased, and at the same time, the heat dissipation performance of the rear shell is reduced. There is also a structure that increases or decreases the thickness of the light guide plate. The cost of the light guide plate is relatively high. Under this structure, the production cost is increased.

[0003] Also, as the vehicle rearview mirror is in operation, the size of the light guide plate will change due to thermal expansion, squeezing the back shell on the side of the light guide plate, causing the light guide plate to deform and arch, and then squeezing the display screen, causing damage to the display screen. At the same time, the reflective film at the bottom of the light guide plate is easily affected by the heat of the lamp beads and wrinkles, which affects the display of the display screen.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a backlight module mounting structure for a vehicle-mounted rearview mirror, wherein the backlight module includes a light bar, a light-enhancing component, a light guide plate, a reflective film, and a foam rubber pad. The sum of the thicknesses of the light-enhancing component, the light guide plate, the reflective film, and the foam rubber pad is equal to the depth of the accommodating groove. The arrangement of the foam rubber pad, on the one hand, has a certain shock-absorbing effect, and on the other hand, can reduce the thickness of the light guide plate, thereby reducing production costs and reducing overall weight. A first soft pad is provided on the left side wall and / or the right side wall, and a second soft pad is provided at both ends of the light bar. The foam rubber pad is provided on the left side wall and / or the right side wall, and a second soft pad is provided at both ends of the light bar. The pad, reflective film, light guide plate, and light-enhancing component all rest against the first soft pad and the second soft pad, so that a gap is formed between the light guide plate and the wall of the rear shell. When the light guide plate changes in size due to thermal expansion, the first soft pad and the second soft pad can keep the light guide plate fixed in the accommodating groove. In addition, a plurality of anti-wrinkle holes are provided at the avoidance groove corresponding to the reflective film, and both ends of the plurality of anti-wrinkle holes extend beyond both ends of the plurality of lamp beads. The anti-wrinkle holes are located in the area outside the light guide plate. The anti-wrinkle holes can provide space for the thermal expansion of the reflective film, thereby preventing the thermal expansion from causing wrinkles in the reflective film in the light guide plate area, thereby affecting the display effect of the display screen.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A backlight module mounting structure for a vehicle rearview mirror, comprising:

[0008] a metal rear shell, the metal rear shell comprising a rear sidewall and an upper sidewall, a right sidewall, a lower sidewall, and a left sidewall disposed in sequence in front of the rear sidewall, the upper sidewall, the right sidewall, the lower sidewall, the left sidewall, and the rear sidewall together forming a receiving groove with an open front end, the left sidewall and / or the right sidewall being provided with a first soft pad;

[0009] A backlight module, comprising a light bar, a light-enhancing component, a light guide plate, a reflective film, and a foam pad. The light bar is adhered to the upper side wall by thermally conductive adhesive. The light bar has a plurality of lamp beads arranged at intervals. A second soft pad is provided at both ends of the light bar. The foam pad, reflective film, light guide plate, and light-enhancing component are stacked in sequence from back to front in the accommodating groove and all abut against the first soft pad and the second soft pad. The light-enhancing component and the light guide plate are each provided with an avoidance groove corresponding to the lamp beads, and a gap is formed between the lamp beads and the avoidance groove. The foam pad and reflective film are both located behind the lamp beads. The reflective film is provided with a plurality of anti-wrinkle holes arranged at intervals along the extension direction of the light bar at the position corresponding to the avoidance groove.

[0010] The sum of the thicknesses of the light-enhancing component, the light guide plate, the reflective film, and the foam pad is equal to the depth of the accommodating groove, and both ends of the plurality of anti-wrinkle holes extend beyond both ends of the plurality of lamp beads.

[0011] As a preferred solution, the thickness of the light guide plate is 2.5 times the thickness of the reflective film.

[0012] As a preferred solution, the periphery of the light guide plate does not exceed the periphery of the reflective film.

[0013] As a preferred solution, the first soft pad and the second soft pad are both silicone pads.

[0014] As a preferred solution, the brightness enhancement component includes a diffusion film, a rear brightness enhancement film, a front brightness enhancement film, and a DBEF film stacked in sequence from back to front.

[0015] As a preferred solution, the metal back shell is made of aluminum.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0017] The main thing is that the backlight module includes a light bar, a light-enhancing component, a light guide plate, a reflective film and a foam pad. The sum of the thickness dimensions of the light-enhancing component, the light guide plate, the reflective film and the foam pad is equal to the depth dimension of the accommodating groove. The setting of the foam pad, on the one hand, has a certain shock-absorbing effect, and on the other hand, can reduce the thickness of the light guide plate, thereby reducing production costs and reducing overall weight. A first soft pad is provided on the left side wall and / or the right side wall, and a second soft pad is provided at both ends of the light bar. The foam pad, reflective film, light guide plate and light-enhancing component are all against the first soft pad. and the second soft pad, so that a gap is formed between the light guide plate and the wall of the rear shell. When the light guide plate changes in size due to thermal expansion, the first soft pad and the second soft pad can keep the light guide plate fixed in the accommodating groove. In addition, a plurality of anti-wrinkle holes are opened at the avoidance groove corresponding to the reflective film, and both ends of the plurality of anti-wrinkle holes exceed both ends of the plurality of lamp beads. The anti-wrinkle holes are located in the area outside the light guide plate. The anti-wrinkle holes can provide space for the thermal expansion of the reflective film, thereby avoiding the thermal expansion causing wrinkles in the reflective film in the light guide plate area and affecting the display effect of the display screen.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of a preferred embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0021] Figure 3 It is a cross-sectional schematic diagram of a preferred embodiment of the present utility model;

[0022] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0023] Description of the accompanying drawings:

[0024] 10. Metal shell 11. Rear side wall

[0025] 12. Upper side wall 13. Right side wall

[0026] 14. Lower side wall 15. Left side wall

[0027] 101. Storage tank

[0028] 20. Backlight module 21. Light bar

[0029] 211, lamp beads 22, light-enhancing components

[0030] 221, diffusion film 222, rear enhancement film

[0031] 223, front enhancement film 224, DBEF film

[0032] 23. Light guide plate 24. Reflective film

[0033] 241, anti-wrinkle hole 25, foam pad

[0034] 201, avoidance groove 30, first soft pad

[0035] 40. Thermal conductive adhesive 50. Second soft pad. DETAILED DESCRIPTION

[0036] First of all, it should be noted that in the description of the present invention, the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the 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 cannot be understood as a limitation on the present invention.

[0037] Please refer to Figures 1 to 4 As shown, it shows the specific structure of a preferred embodiment of the present invention, including a metal rear shell 10 and a backlight module 20.

[0038] The metal back shell 10 includes a rear side wall 11 and an upper side wall 12, a right side wall 13, a lower side wall 14, and a left side wall 15 which are connected in sequence and arranged on the front side of the rear side wall 11. The upper side wall 12, the right side wall 13, the lower side wall 14, the left side wall 15, and the rear side wall 11 together form a accommodating groove 101 with an open front end. The left side wall 15 and / or the right side wall 13 are provided with a first soft pad 30; specifically, the metal back shell 10 is made of aluminum, which has better heat dissipation effect, and the first soft pad 30 is a silicone pad.

[0039] The backlight module 20 includes a light bar 21, a light-enhancing component 22, a light guide plate 23, a reflective film 24 and a foam pad 25. The sum of the thicknesses of the light-enhancing component 22, the light guide plate 23, the reflective film 24 and the foam pad 25 is equal to the depth of the accommodating groove 101 to meet the thickness requirements of the structure.

[0040] The light bar 21 is adhered to the upper side wall 12 by a heat-conducting adhesive 40. The light bar 21 has a plurality of lamp beads 211 arranged at intervals. A second soft pad 50 is provided at both ends of the light bar 21, wherein the second soft pad 50 is a silicone pad.

[0041] The foam pad 25, reflective film 24, light guide plate 23, and light-enhancing component 22 are stacked in sequence from back to front in the accommodating groove 101 and all abut against the first soft pad 30 and the second soft pad 50. The light-enhancing component 22 and the light guide plate 23 are each provided with an avoidance groove 201 corresponding to the lamp beads 211, and a gap is formed between the lamp beads 211 and the avoidance groove 201. The foam pad 25 and the reflective film 24 are both located behind the lamp beads 211. The reflective film 24 is provided with a plurality of anti-wrinkle holes 241 arranged at intervals along the extension direction of the light bar 21 at the avoidance groove 201 corresponding to the lamp beads 211. The ends of the plurality of anti-wrinkle holes 241 extend beyond the ends of the plurality of lamp beads 211.

[0042] Specifically, the light-enhancing component 22 includes a diffusion film 221, a rear light-enhancing film 222, a front light-enhancing film 223, and a DBEF film 224 stacked in sequence from back to front. The periphery of the light guide plate 23 does not exceed the periphery of the reflective film 24, ensuring that the reflective film 24 can fully reflect the light guide plate 23.

[0043] In this embodiment, the thickness of the light guide plate 23 is 2.5 times the thickness of the reflective film 24 .

[0044] The design focus of this utility model is:

[0045] The main thing is that the backlight module includes a light bar, a light-enhancing component, a light guide plate, a reflective film and a foam pad. The sum of the thickness dimensions of the light-enhancing component, the light guide plate, the reflective film and the foam pad is equal to the depth dimension of the accommodating groove. The setting of the foam pad, on the one hand, has a certain shock-absorbing effect, and on the other hand, can reduce the thickness of the light guide plate, thereby reducing production costs and reducing overall weight. A first soft pad is provided on the left side wall and / or the right side wall, and a second soft pad is provided at both ends of the light bar. The foam pad, reflective film, light guide plate and light-enhancing component are all against the first soft pad. and the second soft pad, so that a gap is formed between the light guide plate and the wall of the rear shell. When the light guide plate changes in size due to thermal expansion, the first soft pad and the second soft pad can keep the light guide plate fixed in the accommodating groove. In addition, a plurality of anti-wrinkle holes are opened at the avoidance groove corresponding to the reflective film, and both ends of the plurality of anti-wrinkle holes exceed both ends of the plurality of lamp beads. The anti-wrinkle holes are located in the area outside the light guide plate. The anti-wrinkle holes can provide space for the thermal expansion of the reflective film, thereby avoiding the thermal expansion causing wrinkles in the reflective film in the light guide plate area and affecting the display effect of the display screen.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A backlight module mounting structure for a vehicle rearview mirror, characterized in that: include: a metal rear shell, the metal rear shell comprising a rear sidewall and an upper sidewall, a right sidewall, a lower sidewall, and a left sidewall disposed in sequence in front of the rear sidewall, the upper sidewall, the right sidewall, the lower sidewall, the left sidewall, and the rear sidewall together forming a receiving groove with an open front end, the left sidewall and / or the right sidewall being provided with a first soft pad; A backlight module, comprising a light bar, a light-enhancing component, a light guide plate, a reflective film, and a foam pad. The light bar is adhered to the upper side wall by thermally conductive adhesive. The light bar has a plurality of lamp beads arranged at intervals. A second soft pad is provided at both ends of the light bar. The foam pad, reflective film, light guide plate, and light-enhancing component are stacked in sequence from back to front in the accommodating groove and all abut against the first soft pad and the second soft pad. The light-enhancing component and the light guide plate are each provided with an avoidance groove corresponding to the lamp beads, and a gap is formed between the lamp beads and the avoidance groove. The foam pad and reflective film are both located behind the lamp beads. The reflective film is provided with a plurality of anti-wrinkle holes arranged at intervals along the extension direction of the light bar at the position corresponding to the avoidance groove. The sum of the thicknesses of the light-enhancing component, the light guide plate, the reflective film, and the foam pad is equal to the depth of the accommodating groove, and both ends of the plurality of anti-wrinkle holes extend beyond both ends of the plurality of lamp beads.

2. The backlight module mounting structure for a vehicle rearview mirror according to claim 1, characterized in that: The thickness of the light guide plate is 2.5 times that of the reflective film.

3. The backlight module mounting structure for a vehicle rearview mirror according to claim 1, characterized in that: The periphery of the light guide plate does not exceed the periphery of the reflective film.

4. The backlight module mounting structure for a vehicle rearview mirror according to claim 1, characterized in that: The first soft pad and the second soft pad are both silicone pads.

5. The backlight module mounting structure for a vehicle rearview mirror according to claim 1, characterized in that: The brightness enhancement component includes a diffusion film, a rear brightness enhancement film, a front brightness enhancement film, and a DBEF film which are stacked in sequence from back to front.

6. The backlight module mounting structure for a vehicle rearview mirror according to claim 1, characterized in that: The metal rear shell is made of aluminum.

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