Anti-static backlight source assembly

Abstract

The utility model discloses an anti-static backlight source assembly, which comprises a plastic support, a light guide plate, a light guide plate and a light guide plate, the periphery of the top of the supporting plate part extends upwards to form a peripheral frame wall; the light-emitting component comprises a PCB (Printed Circuit Board), a side light-emitting LED, a grounding circuit, a first electrode pin, a second electrode pin and a grounding pin, the grounding circuit extends along an arrangement route of the side light-emitting LED, the first electrode pin and the second electrode pin, and a distance is kept between the grounding circuit and the arrangement route; the light guide assembly is arranged at the top of the supporting plate part and located between the light emitting assembly and the inner side of the left wall; the metal shell is arranged at the bottom of the supporting plate part, and the grounding pin is electrically connected to the metal shell; the metal shell is U-shaped and is formed by sequentially and integrally connecting the front plate, the bottom plate and the rear plate, and the plastic bracket is combined with the metal shell with a simple structure, so that the metal shell has the functions of auxiliary reinforcement, static resistance and the like, is convenient to produce and assemble, and is beneficial to lightening and thinning of a product.

Description

Technical Field

[0001] The utility model relates to the field of backlight modules, in particular to an anti-static backlight source component. Background Art

[0002] The backlight module is one of the key components of the LCD screen. The backlight module can provide light source for the LCD screen and also play the main supporting and protective role.

[0003] A common backlight module includes a plastic middle frame and a metal bottom frame. The metal bottom frame is snap-fitted to the bottom of the plastic middle frame. The plastic middle frame and the metal bottom frame form an internal space to install and position accessories such as a light guide plate, light strip, diffusion film, and reflective film.

[0004] In the development process of backlight modules, technical personnel in the industry consider eliminating the metal bottom frame to meet the development needs of thinner and lighter products. For example, CN 105093684 A discloses a backlight source, a display panel and a display device, which eliminate the metal back plate in the hope of reducing the thickness of the backlight source. At the same time, a grounding lead is set on the flexible PCB board FPC of the backlight source, and the reflector is set as a conductive reflector. The static electricity of the conductive reflector is then guided to the grounding lead through conductive glue, and the static electricity is guided out by the grounding lead, thereby improving the anti-static ability of the backlight source, avoiding malfunction of the backlight source due to static electricity damage, and preventing static electricity from damaging the display panel.

[0005] However, in actual production and application, this kind of plastic frame structure with surrounding frame walls is not ideal for the installation and positioning of accessories such as reflectors, light guide plates, and diffusers. Without the metal backplane, the installation and positioning reliability and assembly convenience are particularly deficient, making it difficult to adapt to fully automated production. Moreover, such a backlight source is installed as a whole and applied to electronic products, and its structural strength is not ideal, which is also more troublesome in subsequent installation and application. Especially for car-mounted display screens, the requirements for their ability to withstand shaking are high, making them even more difficult to apply. Therefore, up to now, the more common backlight module is still the mainstream structure of a plastic middle frame and a metal bottom frame.

[0006] In view of this, the applicant provides a new backlight source assembly, which eliminates the metal frame and combines a metal shell with a simple structure on a plastic bracket, so that it has the functions of auxiliary reinforcement and anti-static, and is easy to produce and assemble. Utility Model Content

[0007] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an anti-static backlight source assembly, which has the functions of auxiliary reinforcement and anti-static, by combining a metal shell with a simple structure on a plastic bracket and the structural design of the light-emitting assembly. It is easy to produce and assemble, and is conducive to making the product lighter and thinner.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An anti-static backlight source assembly, comprising

[0010] A plastic bracket; the plastic bracket includes a supporting plate; a surrounding frame wall extends upward from the top of the supporting plate, and the surrounding frame walls include a front wall, a left wall, a rear wall and a right wall connected in sequence;

[0011] A light-emitting component; the light-emitting component includes a PCB board and a side-emitting LED, a grounding circuit, a first electrode pin, a second electrode pin and a grounding pin arranged on the PCB board, two ends of the side-emitting LED are respectively connected to the first electrode pin and the second electrode pin, the grounding circuit is connected to the grounding pin, and the grounding circuit is extended along the arrangement route of the side-emitting LED and the first electrode pin and the second electrode pin, and keeps a distance from the arrangement route; the PCB board is arranged on the top of the supporting plate part and close to the inner side of the right wall;

[0012] A light guide assembly; the light guide assembly is disposed on the top of the support plate portion and is located between the light emitting assembly and the inner side of the left wall;

[0013] A metal shell; the metal shell is arranged at the bottom of the supporting plate portion, and the grounding pin is electrically connected to the metal shell; the metal shell is U-shaped, and is formed by a front plate, a bottom plate and a rear plate connected in sequence as a whole, the front plate is covered on the front side of the front wall, the bottom plate is covered on the bottom of the supporting plate portion, and the rear plate is covered on the rear side of the rear wall.

[0014] As a preferred solution, the light guide assembly includes a light guide plate, a reflective film and a diffusion film, the reflective film is arranged on the top of the supporting plate, the light guide plate is located above the reflective film, and the diffusion film is located above the light guide plate.

[0015] As a preferred solution, the inner sides of the front wall and the rear wall are both provided with first buckle grooves, the front end and the rear end of the light guide plate are both provided with first buckle portions protruding outwardly, the light guide plate is pressed onto the supporting plate portion, and the first buckle portion is embedded in the corresponding first buckle groove.

[0016] As a preferred solution, a square-shaped adhesive layer is bonded and fixed to the top of the support plate portion, and the PCB board is pressed downward corresponding to the right side of the square-shaped adhesive layer, so that the PCB board is bonded to the right side of the square-shaped adhesive layer.

[0017] As a preferred solution, the reflective film is bonded and fixed to the left side, front side and back side of the square frame-shaped adhesive layer.

[0018] As a preferred solution, an LCD is further arranged above the light guide component, and the LCD is located in the area surrounded by the surrounding frame walls and on the left side of the light-emitting component. A second buckle portion is arranged at the left end of the LCD, and correspondingly, a second buckle groove is arranged on the inner side of the left wall, and the second buckle portion is embedded in the second buckle groove.

[0019] As a preferred solution, feet are extended downwardly from all sides of the bottom of the support plate portion, and a receiving cavity is formed between the feet and located below the support plate portion; the bottom plate is completely hidden in the receiving cavity.

[0020] As a preferred solution, a third buckle groove is provided on the front plate, and correspondingly, a third buckle portion is provided on the front side of the front wall, and the third buckle portion is embedded in the third buckle groove.

[0021] As a preferred solution, there are more than two side-emitting LEDs, all of which are arranged at intervals in the front-to-back direction, all of which are arranged in series, and the first electrode pin and the second electrode pin are connected to a reverse diode, and the reverse diode forms a parallel relationship with all of the side-emitting LEDs.

[0022] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly combines a metal shell with a simple structure on a plastic bracket and combines the structural design of the light-emitting component to make it have the functions of auxiliary reinforcement and anti-static, and is easy to produce and assemble, and is conducive to making the product light and thin.

[0023] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of an anti-static backlight source assembly according to an embodiment of the utility model;

[0025] Figure 2 It is an exploded view of the anti-static backlight source assembly of the embodiment of the utility model;

[0026] Figure 3It is a circuit diagram of a light-emitting component of an antistatic backlight source component according to an embodiment of the utility model.

[0027] Description of the accompanying drawings: plastic bracket 10, supporting plate portion 11, front wall 111, third buckle portion 1111, left wall 112, rear wall 113, right wall 114, avoidance groove 1141, foot 115, accommodating cavity 116, partition rib 101, light-emitting component 20, PCB board 21, notch 211, side-emitting LED 22, grounding circuit 23, reverse diode 24, square frame adhesive layer 25, shading film 26, adhesive strip 27, light guide component 30, light guide plate 31, first buckle portion 311, reflective film 32, diffusion film 33, metal shell 40, front plate 41, third buckle groove 411, bottom plate 42, LCD 50, second buckle portion 51. DETAILED DESCRIPTION

[0028] Please refer to Figures 1 to 3 As shown, it shows the specific structure of the embodiment of the utility model. In the description of the utility model, it should be noted that the terms "upper", "lower", "left", "right" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] An anti-static backlight source assembly includes a plastic bracket 10, a light emitting assembly 20, a light guide assembly 30 and a metal shell 40.

[0030] The plastic bracket 10 includes a supporting plate portion 11; a frame wall extends upward around the top of the supporting plate portion 11, and the frame wall includes a front wall 111, a left wall 112, a rear wall 113 and a right wall 114 connected in sequence; a pad 115 extends downward around the bottom of the supporting plate portion 11, and a receiving cavity 116 located below the supporting plate portion 11 is formed between the pads 115.

[0031] The light-emitting assembly 20 includes a PCB board 21 and a side-emitting LED 22, a grounding circuit 23, a first electrode pin, a second electrode pin and a grounding pin arranged on the PCB board 21. The two ends of the side-emitting LED 22 are respectively connected to the first electrode pin and the second electrode pin, the grounding circuit 23 is connected to the grounding pin, and the grounding circuit 23 is extended along the arrangement route of the side-emitting LED 22 and the first electrode pin and the second electrode pin, and is spaced from the arrangement route; more than two side-emitting LEDs 22 are arranged, all side-emitting LEDs 22 are spaced along the front-back direction, all side-emitting LEDs 22 are arranged in series, and the first electrode pin and the second electrode pin are connected to a reverse diode 24, and the reverse diode 24 forms a parallel relationship with all side-emitting LEDs 22. The PCB board 21 is arranged at the top of the support plate portion 11 and is arranged close to the inner side of the right wall 114. During specific implementation, a square frame-shaped adhesive layer 25 can be bonded and fixed on the top of the supporting plate portion 11. The square frame-shaped adhesive layer 25 is first bonded and fixed, and then the right side of the PCB board corresponding to the square frame-shaped adhesive layer 25 is pressed downward, so that the PCB board is bonded to the right side of the square frame-shaped adhesive layer 25. An avoidance groove 1141 is provided on the right wall 114 or at the right end of the supporting plate portion 11, so that the first electrode pin, the second electrode pin and the grounding pin can extend from the avoidance groove 1141 to the bottom of the supporting plate portion 11.

[0032] The light guide assembly 30 is arranged on the top of the support plate 11 and is located between the light emitting assembly 20 and the inner side of the left wall 112; the light guide assembly 30 includes a light guide plate 31, a reflective film 32 and a diffusion film 33. The reflective film 32 is arranged on the top of the support plate 11 and is bonded and fixed to the left, front and rear sides of the square frame-shaped adhesive layer 25. The light guide plate 31 is located above the reflective film 32, and the diffusion film 33 is located above the light guide plate 31. In this embodiment, the installation of the light guide assembly 30 is relatively convenient; the inner sides of the front wall 111 and the rear wall 113 are both provided with a first buckle groove, and the front and rear ends of the light guide plate 31 are both provided with a first buckle portion 311 protruding outwardly, and the outer side surface of the first buckle portion 311 is designed to be an inclined surface, for example, an inclined surface inclined inwardly from top to bottom, so as to form a guide structure that is easy to insert. The light guide plate 31 is pressed onto the support plate 11 from top to bottom, and the first buckle portion 311 is embedded in the corresponding first buckle groove, so that the light guide plate 31 is pressed onto the reflective film 32. Of course, the buckling height of the light guide plate 31 can also be used to maintain a slight gap between the bottom end surface of the light guide plate 31 and the reflective film 32.

[0033] The metal shell 40 is disposed at the bottom of the support plate portion 11, and the ground pin is electrically connected to the metal shell 40. The metal shell 40 is U-shaped, and is formed by the front plate 41, the bottom plate 42 and the rear plate being connected in sequence as one body, the front plate 41 being covered on the front side of the front wall 111, the bottom plate 42 being covered on the bottom of the support plate portion 11, and the rear plate being covered on the rear side of the rear wall 113. The bottom plate 42 is completely hidden in the accommodating cavity. A third buckle groove 411 is disposed on the front plate 41, and correspondingly, a third buckle portion 1111 is disposed on the front side of the front wall 111, and the third buckle portion 1111 is embedded in the third buckle groove 411. Preferably, a recess is provided on the front side of the front wall 111 for accommodating and positioning the front plate 41, so that after the metal shell 40 is installed, the surface height is maintained at the front side of the front wall 111, and the flatness is good. The metal shell 40 provided in this way has a light and thin structure and is easy to produce. The plastic bracket 10 is used as the main structure that acts as a bracket, and the metal shell 40 is used for auxiliary reinforcement, shielding, and static electricity removal. The metal shell 40 is attached to the bottom of the plastic bracket 10 and does not affect the appearance of the plastic bracket 10. The structural design of the plastic bracket 10 still takes the installation and positioning of each part and the subsequent positioning in electronic products into consideration, and is not limited to the structure of the metal frame in traditional technology, and the design flexibility is ideal.

[0034] An LCD 50 is also disposed above the light guide assembly 30. The LCD 50 is located in the area surrounded by the surrounding frame walls and on the left side of the light emitting assembly 20. A second buckle 51 is disposed at the left end of the LCD 50. Accordingly, a second buckle groove is disposed on the inner side of the left wall 112. The second buckle 51 is embedded in the second buckle groove. Usually, several pins of the LCD 50 extend downward from the rear end.

[0035] Next, the assembly process of the anti-static backlight assembly of this embodiment is introduced:

[0036] First, the metal shell 40 is covered on the bottom of the plastic bracket 10 to form a buckle-fitting positioning, so that the metal shell 40 is combined and attached to the bottom of the plastic bracket 10 to form an integrated plastic bracket 10 structure with the metal shell 40;

[0037] Then, the square frame-shaped adhesive layer 25 is attached to the top of the supporting plate portion 11, and then the reflective film 32 is bonded and fixed, and then the light guide plate 31 is pressed downward to the top of the plastic bracket 10, and the first buckle portion 311 of the light guide plate 31 is embedded in the corresponding first buckle groove of the plastic bracket 10; at this time, a reserved cavity is formed in the surrounding frame wall between the light guide plate 31 and the right wall 114, and the reserved cavity is used for the installation and positioning of the light-emitting component 20;

[0038] Then, the light emitting component 20 is placed in the reserved cavity, the bottom end of the PCB board 21 is bonded and fixed to the right side of the square frame-shaped adhesive layer 25, and a notch 211 is provided at the front end and / or the rear end of the PCB board 21, and the notch 211 is adapted to the positioning protrusion on the inner side of the front wall 111 and / or the rear wall 113 of the plastic bracket 10 to prevent the PCB board 21 from being offset in the left and right directions;

[0039] Then, the diffusion film 33 is disposed above the light guide plate 31;

[0040] Then, LCD 50 is placed above the diffusion film 33; partition ribs 101 are provided on the inner sides of the front wall 111 and the rear wall 113 of the plastic bracket 10, which divide the area surrounded by the four frame walls into two areas, the left area is for LCD 50 to be placed and positioned, and the right area is for PCB board 21 of the light emitting component 20 to be placed and positioned;

[0041] Finally, at the bottom of the plastic bracket 10 , the ground pin and the metal shell 40 are electrically connected by using a wire, for example, the wire is welded to the bottom of the bottom plate 42 .

[0042] The design focus of the utility model is that it mainly combines a metal shell 40 with a simple structure on the plastic bracket 10 and the structural design of the light-emitting component 20, so that it has the functions of auxiliary reinforcement and anti-static, is easy to produce and assemble, and is conducive to the lightness and thinness of the product.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight 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. An anti-static backlight source assembly, characterized in that: Included A plastic bracket; the plastic bracket includes a supporting plate; a surrounding frame wall extends upward from the top of the supporting plate, and the surrounding frame walls include a front wall, a left wall, a rear wall and a right wall connected in sequence; A light-emitting component; the light-emitting component includes a PCB board and a side-emitting LED, a grounding circuit, a first electrode pin, a second electrode pin and a grounding pin arranged on the PCB board, two ends of the side-emitting LED are respectively connected to the first electrode pin and the second electrode pin, the grounding circuit is connected to the grounding pin, and the grounding circuit is extended along the arrangement route of the side-emitting LED and the first electrode pin and the second electrode pin, and keeps a distance from the arrangement route; the PCB board is arranged on the top of the supporting plate part and close to the inner side of the right wall; A light guide assembly; the light guide assembly is disposed on the top of the support plate portion and is located between the light emitting assembly and the inner side of the left wall; A metal shell; the metal shell is arranged at the bottom of the supporting plate portion, and the grounding pin is electrically connected to the metal shell; the metal shell is U-shaped, and is formed by a front plate, a bottom plate and a rear plate connected in sequence as a whole, the front plate is covered on the front side of the front wall, the bottom plate is covered on the bottom of the supporting plate portion, and the rear plate is covered on the rear side of the rear wall.

2. The antistatic backlight source assembly according to claim 1, characterized in that: The light guide assembly includes a light guide plate, a reflective film and a diffusion film, wherein the reflective film is arranged on the top of the supporting plate, the light guide plate is located above the reflective film, and the diffusion film is located above the light guide plate.

3. The antistatic backlight assembly according to claim 2, characterized in that: The inner sides of the front wall and the rear wall are both provided with first buckle grooves, the front end and the rear end of the light guide plate are both provided with first buckle parts protruding outwards, the light guide plate is pressed onto the supporting plate part, and the first buckle parts are embedded in the corresponding first buckle grooves.

4. The antistatic backlight source assembly according to claim 2, characterized in that: A square frame-shaped adhesive layer is bonded and fixed to the top of the support plate portion, and the PCB board is pressed downward corresponding to the right side of the square frame-shaped adhesive layer, so that the PCB board is bonded to the right side of the square frame-shaped adhesive layer.

5. The antistatic backlight source assembly according to claim 4, characterized in that: The reflective film is bonded and fixed to the left side, front side and rear side of the square frame-shaped adhesive layer.

6. The antistatic backlight assembly according to claim 4, characterized in that: An LCD is also arranged above the light guide component. The LCD is located in the area surrounded by the surrounding frame walls and on the left side of the light-emitting component. A second buckle portion is arranged at the left end of the LCD. Correspondingly, a second buckle groove is arranged on the inner side of the left wall, and the second buckle portion is embedded in the second buckle groove.

7. The antistatic backlight assembly according to claim 1, characterized in that: The bottom of the support plate portion is provided with feet extending downwards around the support plate portion, and a receiving cavity is formed between the feet and located below the support plate portion; the bottom plate is completely hidden in the receiving cavity.

8. The anti-static backlight assembly according to claim 7, characterized in that: The front plate is provided with a third buckle groove, and correspondingly, the front side of the front wall is provided with a third buckle portion, and the third buckle portion is embedded in the third buckle groove.

9. The antistatic backlight assembly according to claim 1, characterized in that: There are more than two side-emitting LEDs, all of which are arranged at intervals in the front-to-back direction, all of which are arranged in series, and the first electrode pin and the second electrode pin are connected to a reverse diode, which is in parallel with all of the side-emitting LEDs.

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