CN210324939U

CN210324939U - Vehicle-mounted backlight source structure with wide dimming ratio

Info

Publication number: CN210324939U
Application number: CN201921574157.XU
Authority: CN
Inventors: 谢玉群
Original assignee: Shenzhen Quizen Photoelectric Co ltd
Current assignee: Shenzhen Quizen Photoelectric Co ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2020-04-14
Anticipated expiration: 2029-09-21

Abstract

The utility model discloses a wide dimming ratio vehicle-mounted backlight source structure, which comprises a hard rubber bottom frame and a hard rubber surface frame, wherein a bottom plate of the hard rubber bottom frame is provided with a guide pillar and a stud, the inner wall of the peripheral frame of the hard rubber bottom frame is provided with a limiting bulge, the outer wall of the short frame is provided with a buckle, and the long frame is provided with first heat dissipation holes which are uniformly distributed; the guide post is clamped with a PCB, the PCB is electrically connected with LED lamp sets arranged in a dot matrix manner, and the limiting protrusion is fixedly connected with a light guide plate module; the short edge inner wall of ebonite face frame is equipped with the bayonet socket, is equipped with the second louvre on the long edge, ebonite underframe, ebonite face frame pass through the buckle connection and realize locking to first louvre and second louvre coincide completely after the locking. The utility model discloses a simple structure of vehicle-mounted backlight structure, the equipment is convenient, and PCB board below is equipped with the radiating headspace of being convenient for, and this structural style has effectively kept the luminous performance of vehicle-mounted backlight and has improved its life.

Description

Vehicle-mounted backlight source structure with wide dimming ratio

Technical Field

The utility model relates to a backlight technical field, specific theory relates to a wide dimming ratio vehicle-mounted backlight structure.

Background

The vehicle-mounted backlight source is a light source positioned behind the vehicle-mounted display screen, the luminous effect of the vehicle-mounted backlight source directly influences the visual effect of the vehicle-mounted display screen, however, the LED lamp bank of the current vehicle-mounted backlight source is not uniform in brightness, so that the visual effect of the vehicle-mounted display screen is poor, the PCB is directly adhered to the bottom plate of the shell, the vehicle-mounted backlight source with the structure is poor in heat dissipation performance, and the luminous performance and the service life of the backlight source are seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the deficiency among the prior art, the to-be-solved technical problem of the utility model lies in providing a wide dimming ratio vehicle-mounted backlight structure.

In order to solve the technical problem, the utility model discloses a following scheme realizes: a wide dimming ratio vehicle-mounted backlight source structure comprises a hard rubber bottom frame and a hard rubber surface frame, wherein a bottom plate of the hard rubber bottom frame is provided with a guide pillar and a stud, the inner wall of the peripheral frame of the hard rubber bottom frame is provided with a limiting bulge, the outer wall of a short frame is provided with a buckle, and a long frame is provided with first heat dissipation holes which are uniformly distributed; the guide post is clamped with a PCB, the PCB is electrically connected with LED lamp sets arranged in a dot matrix manner, and the limiting protrusion is fixedly connected with a light guide plate module; the short edge inner wall of ebonite face frame is equipped with the bayonet socket, is equipped with the second louvre on the long edge, ebonite underframe, ebonite face frame pass through the buckle connection and realize locking to first louvre and second louvre coincide completely after the locking.

Further, the light guide plate module comprises a light guide plate, and an antireflection film, a diffusion film and a brightness enhancement film which are sequentially stacked from bottom to top are arranged on the light guide plate.

Furthermore, when the PCB is clamped on the guide pillar, the lower end of the PCB is just abutted to the stud, the stud is provided with a screw for fixing the PCB, a certain space is formed between the PCB and the bottom plate of the hard rubber bottom frame, and the space is a heat dissipation space.

Furthermore, the first heat dissipation holes and the second heat dissipation holes are square heat dissipation holes which are uniformly arranged at intervals, and at least 5 heat dissipation holes are arranged.

Further, the light guide plate module passes through heat-resistant glue and bonds in spacing protruding, hug closely all around in the ebonite underframe of light guide plate module to it is sealed through heat-resistant glue.

Furthermore, an outer connecting end is arranged on the PCB and penetrates through the hard glue bottom frame to be exposed outside.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses the PCB integrated circuit board of on-vehicle backlight connects on the guide pillar of ebonite underframe to through the screw-fastening on the double-screw bolt, guaranteed the stability of structure, leave certain space between PCB board and the ebonite underframe, this space makes things convenient for this on-vehicle backlight to carry out the heat exchange with the external world, dispels the heat, has improved the performance and the life of this on-vehicle backlight.

2. The utility model discloses the even dot matrix of LED banks of on-vehicle backlight is arranged on the PCB board, has increased the homogeneity of light source and the luminance of adjusting luminance, is equipped with the light guide plate on it, and the reflection reducing coating on the light guide plate can also reduce the reflection of light source, makes as much as possible the light source obtain utilizing, has increased this on-vehicle backlight luminous effect.

Drawings

FIG. 1 is a schematic view of the explosion structure of the vehicular backlight source of the present invention;

FIG. 2 is a schematic structural view of the bottom frame of the hard rubber of the vehicular backlight source of the present invention;

FIG. 3 is an enlarged view of the position A of the present invention;

in the drawings: 1. hard glue bottom frame, 2, PCB board, 3, LED banks, 4, light guide plate module, 5, hard glue face frame, 11, guide pillar, 12, double-screw bolt, 13, spacing arch, 14, buckle, 15, first louvre, 41, light guide plate, 42, antireflection coating, 43, diffusion barrier, 44, the membrane that adds lustre to, 51, bayonet, 52, second louvre.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the scope of the present invention more clearly defined.

Referring to the attached drawings 1-3, the utility model discloses a wide dimming ratio vehicle-mounted backlight structure, including ebonite underframe 1 and ebonite face frame 5, be equipped with guide pillar 11 and double-screw bolt 12 on the bottom plate of ebonite underframe 1, the frame inner wall all around of ebonite underframe 1 is equipped with spacing arch 13, and the outer wall of short frame is equipped with buckle 14, is equipped with evenly distributed first louvre 15 on the long frame; a PCB (printed circuit board) 2 is clamped on the guide pillar 11, LED lamp sets 3 arranged in a lattice manner are electrically connected on the PCB 2, and a light guide plate module 4 is fixedly connected on the limiting protrusion 13; the short edge inner wall of ebonite face frame 5 is equipped with bayonet 51, is equipped with second louvre 52 on the long edge, ebonite underframe 1, ebonite face frame 5 realize locking through the buckle connection to first louvre 15 and second louvre 52 coincide completely after the locking. First louvre 15, second louvre 52 are the square louvre of even interval arrangement, the utility model discloses preferred embodiment's first louvre 15, second louvre 52 are equipped with 7 in the unilateral.

Specifically, the light guide plate module 4 includes a light guide plate 41, and the light guide plate 41 is provided with an antireflection film 42, a diffusion film 43, and a brightness enhancement film 44 which are sequentially laminated from bottom to top, wherein the light guide plate 41 is above the PCB 2 and is used for guiding the light source of the LED lamp group 3 and dispersing the light source on the light guide plate 41; the antireflection film 42 is used to reduce the reflection of light, so that more light sources can be utilized; the diffusion film 43 is used to uniformly diffuse the light source; the brightness enhancement film 44 is used to increase the brightness of the light source and improve the light source effect of the vehicle-mounted backlight.

Specifically, when 2 joints of PCB board are on guide pillar 11, its lower extreme supports just on the double-screw bolt 12, be equipped with the screw of 2 fixed with PCB board on the double-screw bolt 12, double-screw bolt 12 can also play the effect of supporting PCB board 2, there is certain space between PCB board 2 and the ebonite underframe 1 bottom plate, the space gives off the space for the heat, and the air passes in and out from first louvre 15, second louvre 52 and carries out the heat cycle exchange, in time gives off the heat.

Specifically, the light guide plate module 4 is bonded to the limiting protrusions 13 through heat-resistant glue, and the heat-resistant glue can fix the light guide plate module 4, so that the stability of the light guide plate module 4 is improved; hug closely all around in ebonite underframe 1 of light guide plate module 4 to through heat-resistant gluey sealed, prevented the downward diffusion of light source, effectively improved the utilization ratio of LED banks light source.

Specifically, an external connection end is arranged on the PCB 2, the external connection end penetrates through the hard rubber bottom frame 1 to be exposed outside, and the external connection end of the PCB 2 is used for being connected with an external power supply to improve electric energy for the vehicle-mounted backlight source.

The display module assembly of on-vehicle display screen sets up in the upper end of ebonite face frame 5, and the even dot matrix arrangement of LED banks of on-vehicle backlight has increased the homogeneity of light source and the luminance of adjusting luminance on the PCB board, and even LED banks light source shines on the display module assembly of on-vehicle display screen from the bottom through the optical action of light guide plate 41, antireflection coating 42, diffusion barrier 43 and membrane 44 that adds lustre to, has increased the contrast of adjusting luminance of demonstration, has promoted display effect.

The utility model discloses a simple structure and stability of vehicle-mounted backlight structure are strong, and the equipment is convenient, and the headspace of PCB board below is convenient for dispel the heat, can effectively keep the luminous performance of this vehicle-mounted backlight and improve its life.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. The utility model provides a wide dimming ratio vehicle-mounted backlight structure which characterized in that: the glue bottom frame comprises a hard glue bottom frame (1) and a hard glue surface frame (5), wherein a bottom plate of the hard glue bottom frame (1) is provided with a guide post (11) and a stud (12), the inner wall of the peripheral frame of the hard glue bottom frame (1) is provided with a limiting bulge (13), the outer wall of a short frame is provided with a buckle (14), and a long frame is provided with first heat dissipation holes (15) which are uniformly distributed; the guide post (11) is clamped with a PCB (2), the PCB (2) is electrically connected with LED lamp sets (3) arranged in a dot matrix manner, and the limiting bulge (13) is fixedly connected with a light guide plate module (4); the short edge inner wall of ebonite face frame (5) is equipped with bayonet socket (51), is equipped with second louvre (52) on the long limit, ebonite underframe (1), ebonite face frame (5) are connected through the buckle and are realized locking to first louvre (15) and second louvre (52) coincide completely after the locking.

2. The wide dimming ratio vehicular backlight structure according to claim 1, wherein: the light guide plate module (4) comprises a light guide plate (41), and an antireflection film (42), a diffusion film (43) and a brightness enhancement film (44) which are sequentially stacked from bottom to top are arranged on the light guide plate (41).

3. The wide dimming ratio vehicular backlight structure according to claim 1, wherein: when the PCB (2) is clamped on the guide pillar (11), the lower end of the PCB is just abutted to the stud (12), a screw for fixing the PCB (2) is arranged on the stud (12), a certain space is arranged between the PCB (2) and the bottom plate of the hard glue bottom frame (1), and the space is a heat dissipation space.

4. The wide dimming ratio vehicular backlight structure according to claim 1, wherein: the first heat dissipation holes (15) and the second heat dissipation holes (52) are square heat dissipation holes which are uniformly arranged at intervals, and at least 5 heat dissipation holes are arranged.

5. The wide dimming ratio vehicular backlight structure according to claim 1, wherein: light guide plate module (4) bond through heat-resistant glue on spacing arch (13), hug closely all around in ebonite underframe (1) light guide plate module (4) to it is sealed through heat-resistant glue.

6. The wide dimming ratio vehicular backlight structure according to claim 1, wherein: the PCB (2) is provided with an external connection end, and the external connection end penetrates through the hard adhesive bottom frame (1) and is exposed outside.