Vehicle-mounted backlight source structure capable of preventing backlight membrane material from being extruded

Abstract

The utility model provides a vehicle-mounted backlight source structure capable of preventing a backlight membrane material from being extruded, which comprises a rubber frame and a backlight module arranged in the rubber frame, a metal back plate playing a supporting and protecting role is arranged on the back face of the backlight module, the metal back plate is bent to form a U-shaped groove, the backlight module comprises a light guide plate, the light guide plate is inserted into the U-shaped groove, and the light guide plate is arranged in the U-shaped groove. A reflector plate is arranged on the back face of the light guide plate, a backlight film material is arranged on the front face of the light guide plate and arranged in a rubber frame, a light bar assembly is correspondingly arranged on the light incident side face of the front end of the light guide plate, the rubber frame comprises a main frame and side walls surrounding the main frame, the main frame is located above the backlight module, and the backlight film material is located in a containing cavity defined by the side walls of the rubber frame. An anti-deformation reinforcing rib used for being pressed on the light guide plate is arranged on the bottom face of the light inlet side in the main frame. Compared with the prior art, the vehicle-mounted backlight source structure can improve the stability of optical and reliable performance and reduce the production cost.

Description

Technical Field

[0001] The utility model relates to the field of optoelectronics, in particular to a vehicle-mounted backlight source structure which can prevent a backlight film material from being squeezed. Background Art

[0002] In order to meet customers' requirements for the brightness of vehicle-mounted backlight modules, vehicle-mounted backlight sources are conventionally designed with two layers of optical films, upper and lower. In different seasons or under different ambient temperature conditions, the temperature and humidity of the working environment vary greatly. The optical film will expand and contract with different ambient temperatures and humidity. In order to prevent the optical film from expanding and contracting due to external force, causing abnormal luminous effects, a 0.2~0.3mm gap for free expansion and contraction is reserved in the Z direction between the optical film and the plane of the plastic frame when designing the structure of the vehicle-mounted backlight source. However, under low temperature, high temperature or high humidity environmental conditions, the plastic frame that plays a skeletal support role may deform, resulting in the disappearance or reduction of the Z direction gap originally reserved for the free expansion and contraction of the optical film, resulting in the obstruction of the free expansion and contraction space of the optical film in the Z direction, thereby causing abnormal fluctuations in the brightness enhancement film. Utility Model Content

[0003] In response to the problem that the above-mentioned vehicle-mounted backlight produces abnormal fluctuations when the rubber frame is deformed and squeezed onto the bright-enhancing film, the utility model provides a vehicle-mounted backlight source structure that prevents the backlight film from being squeezed, and prevents the rubber frame from deforming and squeezing the optical film when the backlight source module is used in different temperature and humidity environments, thereby ensuring that the optical film has space for free expansion and contraction without obstruction and can expand and contract normally, thereby improving the stability of optical and reliability performance and reducing production costs.

[0004] The technical solution adopted by the utility model is:

[0005] A vehicle-mounted backlight source structure for preventing a backlight film from being squeezed comprises a rubber frame, a backlight module arranged in the rubber frame, a metal back plate for supporting and protecting the back of the backlight module being arranged, the metal back plate being bent to form a U-shaped groove, the backlight film group comprising a light guide plate, the light guide plate being inserted into the U-shaped groove, a reflective sheet being arranged on the back of the light guide plate, a backlight film being arranged on the front of the light guide plate, the backlight film being loaded into the rubber frame, a light bar assembly corresponding to the light incident side surface of the front end of the light guide plate, and characterized in that: the rubber frame comprises a main frame and side walls surrounding the main frame, the main frame being located above the backlight module, the backlight film being located in a cavity formed by the side walls of the rubber frame, and anti-deformation reinforcing ribs for pressing on the light guide plate are arranged on the bottom surface of the light incident side in the main frame.

[0006] Preferably, the anti-deformation reinforcement rib is close to the side wall of the plastic frame to which the light bar is attached, and the gap between the anti-deformation reinforcement rib and the side wall of the plastic frame is greater than 2 mm.

[0007] More preferably, the anti-deformation reinforcement rib is in the shape of a whole strip.

[0008] More preferably, the anti-deformation reinforcement rib is a discontinuous strip type.

[0009] More preferably, the height of the anti-deformation reinforcing rib is equal to the thickness of the backlight film material, which is 0.5-0.8 mm.

[0010] Preferably, the backlight film material comprises a lower diffuser, a lower brightness enhancement sheet, an upper brightness enhancement sheet and a mouth glue which are stacked in sequence, and the light guide plate is located on the back of the lower diffuser.

[0011] More preferably, the light bar assembly is fixed on the inner wall of the metal back plate, and a buckle that cooperates with the bayonet on the rubber frame is provided on the outer wall of the metal back plate.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the utility model provides a vehicle-mounted backlight source structure that prevents the backlight film from being squeezed, and anti-deformation reinforcement ribs for pressing on the light guide plate are provided on the bottom surface of the light incident side of the rubber frame which is easily deformed, so as to prevent the rubber frame from deforming and squeezing the brightening film when the backlight source module is used in different temperature and humidity environments, thereby ensuring the space for the brightening film to expand and contract freely without obstruction and to expand and contract normally, thereby improving the stability of optical and reliability performance and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , which is a schematic diagram of a vehicle-mounted backlight source structure for preventing a backlight film material from being squeezed provided by the utility model;

[0014] Figure 2 , which is an exploded view of a vehicle-mounted backlight source structure for preventing a backlight film material from being squeezed provided by the utility model;

[0015] Figure 3 , which is a cross-sectional view of a vehicle-mounted backlight source structure for preventing a backlight film material from being squeezed provided by the utility model;

[0016] Figure 4 , which is a schematic diagram of a rubber frame in a vehicle-mounted backlight source structure for preventing a backlight film material from being squeezed provided by the utility model. DETAILED DESCRIPTION

[0017] The preferred implementation modes provided by the utility model are described in detail according to the accompanying drawings.

[0018] Figures 1 to 4, a vehicle-mounted backlight source structure for preventing a backlight film from being squeezed provided by the utility model, includes a plastic frame 10, a backlight module 20 arranged in the plastic frame, a metal back plate 30 for supporting and protecting the back of the backlight module is arranged on the back, the metal back plate 30 is bent to form a U-shaped groove, the backlight film group 20 includes a light guide plate 21, the light guide plate 21 is inserted into the U-shaped groove, a reflective sheet 22 is arranged on the back of the light guide plate 21, a backlight film 23 is arranged on the front of the light guide plate 21, the backlight film 23 is installed in the plastic frame 10, and a light bar assembly 40 corresponds to the light incident side surface of the front end of the light guide plate 21; the plastic frame 10 includes a main frame 11 and a side wall 12 surrounding the main frame, the main frame 11 is located above the backlight module 20, and the backlight module 20 is provided with a light strip assembly 40 ... The light film material 23 is in a cavity formed by the side walls of the rubber frame, and the bottom surface of the light incident side in the main frame is provided with anti-deformation reinforcing ribs 13 for pressing on the light guide plate; in this way, the rubber frame structure of the traditional backlight module is optimized, and an anti-deformation reinforcing rib structure is added to the bottom surface of the light incident side of the rubber frame which is easy to deform. During assembly, the anti-deformation reinforcing ribs 13 on the rubber frame are directly pressed on the head of the light incident side of the light guide plate, thereby preventing the light guide plate 21 from deforming or the rubber frame 10 from deforming and squeezing the surface of the backlight film material 23, ensuring the free expansion and contraction space of the backlight film material 23, and effectively solving the problem of ups and downs caused by squeezing the backlight film material 23; at the same time, the reinforcing ribs of the rubber frame also play a role in shielding optical defects.

[0019] The backlight film material can be a non-optical film, a single-layer optical film, a double-layer optical film, a triple-layer optical film or a multi-layer optical film structure. As a preferred embodiment, the backlight film material 23 includes a lower diffuser 231, a lower light-enhancing film 232, an upper light-enhancing film 233 and a mouth glue stacked in sequence, and the light guide plate 21 is located on the back of the lower diffuser 231; the anti-deformation reinforcement rib 13 on the glue frame is directly pressed on the light-incoming side head of the light guide plate to prevent the backlight film material from being squeezed, thereby ensuring the free expansion and contraction space of the backlight film material 23.

[0020] The anti-deformation reinforcement rib 13 is close to the side wall of the plastic frame 10 where the light bar is attached, and the gap between the anti-deformation reinforcement rib and the plastic frame side wall is more than 2 mm. The height of the anti-deformation reinforcement rib is the thickness of the backlight film material, which is 0.5-0.8 mm.

[0021] When the anti-deformation reinforcement ribs are designed on the plane of the light incident side of the plastic frame, when the light source is close to the plastic frame 10, in order to ensure the uniformity of the overall optical effect, the anti-deformation reinforcement ribs are a whole strip structure. If the anti-deformation structure is designed as a partially discontinuous anti-deformation structure, reflection may occur at the discontinuity, affecting the optical effect; when the light source is far away from the plastic frame 10, the anti-deformation reinforcement ribs can be designed as a discontinuous strip structure as needed, which will not produce reflections and significantly improve the reliability and optical stability.

[0022] The light bar assembly 40 is fixed on the inner wall of the metal back plate 30 , and a buckle that cooperates with the rubber frame bayonet is provided on the outer wall of the metal back plate 30 .

[0023] In summary, the technical solution of the utility model can fully and effectively achieve the above-mentioned utility model purpose, and the structure and functional principle of the utility model have been fully verified in the embodiments, and can achieve the expected effect and purpose. Without departing from the principle and essence of the utility model, various changes or modifications can be made to the embodiments of the utility model. Therefore, the utility model includes all replacement contents within the scope mentioned in the scope of the patent application, and any equivalent changes made within the scope of the patent application of the utility model are within the scope of the patent application of this case.

Claims

1. A vehicle-mounted backlight source structure for preventing a backlight film from being squeezed, comprising a plastic frame, a backlight module arranged in the plastic frame, a metal back plate for supporting and protecting the back of the backlight module, the metal back plate being bent to form a U-shaped groove, the backlight module comprising a light guide plate, the light guide plate being inserted into the U-shaped groove, a reflective sheet being arranged on the back of the light guide plate, a backlight film being arranged on the front of the light guide plate, the backlight film being loaded into the plastic frame, a light bar assembly corresponding to the light incident side surface of the front end of the light guide plate, characterized in that: The plastic frame includes a main frame and side walls surrounding the main frame. The main frame is located above the backlight module. The backlight film material is located in a cavity formed by the side walls of the plastic frame. The bottom surface of the light incident side of the main frame is provided with anti-deformation reinforcement ribs for pressing on the light guide plate.

2. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The anti-deformation reinforcement rib is close to the side wall of the plastic frame to which the light bar is attached, and the gap between the anti-deformation reinforcement rib and the side wall of the plastic frame is more than 2 mm.

3. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The anti-deformation reinforcing rib is in the shape of a whole strip.

4. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The anti-deformation reinforcement ribs are discontinuous strip-shaped.

5. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The height of the anti-deformation reinforcing rib is equal to the thickness of the backlight film material, which is 0.5-0.8 mm.

6. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The backlight film material comprises a lower diffusion sheet, a lower brightness enhancement sheet, an upper brightness enhancement sheet and a mouth glue which are stacked in sequence, and the light guide plate is located at the back of the lower diffusion sheet.

7. The vehicle-mounted backlight source structure for preventing backlight film from being squeezed according to claim 1, characterized in that: The light bar assembly is fixed on the inner side wall of the metal back plate, and a buckle that matches with the bayonet on the rubber frame is provided on the outer side wall of the metal back plate.

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