CN216748372U

CN216748372U - Backlight module convenient to fixed lamp strip and light guide plate simultaneously

Info

Publication number: CN216748372U
Application number: CN202123447006.8U
Authority: CN
Inventors: 杨健; 邱振文
Original assignee: Shenzhen Unishine Electronics Co ltd
Current assignee: Shenzhen Unishine Electronics Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-14
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a backlight module convenient for simultaneously fixing a light bar and a light guide plate, which comprises the light guide plate, the light bar, a rubber shell and a PCB (printed Circuit Board), wherein the light guide plate is arranged on the rubber shell, and the light bar is arranged between the light guide plate and the rubber shell; the light bar is arranged on the PCB, one side of the PCB is connected with a fixed plate, the lower part of the clamping groove is provided with an opening penetrating through the surface of the rubber shell, the fixed plate penetrates out of the opening and is matched with the opening in a proper manner, a notch is arranged on the side edge of the light guide plate, and a first bump corresponding to the notch is arranged on the limiting strip; the backlight module provided by the utility model can conveniently fix the light bar and the light guide plate through the arrangement of the wire grooves and the limiting strips.

Description

Backlight module convenient to fixed lamp strip and light guide plate simultaneously

Technical Field

The utility model relates to the technical field of backlight modules, in particular to a backlight module convenient for fixing a light bar and a light guide plate simultaneously.

Background

A Backlight Module (Backlight Module) is a back light Module provided in LCD products, and generally includes a Backlight source, a plurality of layers of Backlight materials and a supporting frame. The backlight quality determines important parameters of the liquid crystal display screen such as brightness, emergent light uniformity, color gradation and the like, and determines the light emitting effect of the liquid crystal display screen to a great extent.

In the current backlight module, light rays can be refracted at the clamping position of the light guide plate in the backlight module to form bright spots, and the positions of the light shading areas with narrow space at two sides are not enough, so that the bright spots cannot be completely shaded, and the phenomenon of obvious bright spots appears in the visible area at the clamping position of the light guide plate, thereby influencing the use of customers; in addition, lamp strips in the backlight module are fixed by using a glue adding method, and the situation that the glue adding amount is not uniformly controlled can occur due to negligence of operating personnel during mass production, so that some lamp strips are not fixed well.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the backlight module which is convenient for simultaneously fixing the lamp strip and the light guide plate.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a backlight module convenient for simultaneously fixing a light bar and a light guide plate comprises the light guide plate, the light bar, a rubber shell and a PCB, wherein the light guide plate is arranged on the rubber shell, and the light bar is arranged between the light guide plate and the rubber shell; the light bar is arranged on the PCB, one side of the PCB is connected with a fixed plate, the lower part of the clamping groove is provided with an opening penetrating through the surface of the rubber shell, the fixed plate penetrates out of the opening and is matched with the opening in a proper manner, a notch is arranged on the side edge of the light guide plate, and a first bump corresponding to the notch is arranged on the limiting strip;

furthermore, the rubber shell comprises 4 side plates and a rear plate coated by the 4 side plates, the size of the light guide plate is consistent with that of the rear plate, and the light guide plate is placed on the rear plate;

furthermore, the clamping grooves are arranged near 1 side plate close to the rubber shell in parallel, and the depth of each clamping groove is larger than or equal to the width of the PCB.

Furthermore, a clamping block used for limiting the movement of the light bar is arranged on the limiting strip facing the clamping groove.

Furthermore, the backlight module further comprises a reflecting film arranged below the light guide plate, a diffusion film arranged on the light guide plate and a shading film arranged on the diffusion film, and the shading film is attached to the rubber casing and the lamp strip. The sizes of the reflecting film and the diffusion film are consistent with the size of the light guide plate.

The utility model has the beneficial effects that:

according to the utility model, the light bar is installed on the PCB with the fixing plate, and the slot and the fixture block are designed on the rubber shell, so that the PCB is stably limited and fixed in the slot, and the fixation of the light bar is completed, thereby solving the problem of light bar looseness caused by personal mistake and also eliminating the dispensing process; and the position of the gap of the light guide plate is designed at two sides far away from the visual area, so that the bright spot formed on the gap can be shielded, and the use is not influenced.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a structural exploded view of the present invention;

FIG. 3 is a schematic structural view of the rubber case of the present invention after a light guide plate, a light bar and a PCB are mounted thereon;

FIG. 4 is an exploded view of the FIG. 3 construction of the present invention;

FIG. 5 is an enlarged view taken at A of FIG. 3 in accordance with the present invention;

description of reference numerals: 1. a light guide plate; 2. a light bar; 3. a rubber shell; 4. a PCB board; 5. a card slot; 6. a limiting strip; 7. a reflective film; 8. a diffusion membrane; 9. a light shielding film; 11. a notch; 12. a second bump; 31. a side plate; 32. a back plate; 41. a fixing plate; 51. an opening; 61. a first bump; 62. a clamping block; 63. a limiting groove.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts are within the protection scope of the present invention based on the embodiments of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The technical characteristics in the utility model can be combined interactively on the premise of not conflicting with each other.

Examples, reference is made to FIGS. 1 to 5

A backlight module convenient for fixing a light bar and a light guide plate simultaneously comprises a light guide plate 1, a light bar 2, a rubber shell 3 and a PCB 4, wherein the light guide plate 1 is arranged on the rubber shell 3, and the light bar 2 is arranged between the light guide plate 1 and the rubber shell 3; a clamping groove 5 and a limiting strip 6 are arranged on the rubber casing 3, the light bar 2 is arranged on a PCB 4, one side of the PCB 4 is connected with a fixing plate 41, an opening 51 penetrating through the surface of the rubber casing 3 is arranged at the lower part of the clamping groove 5, the fixing plate 41 penetrates through the opening 51 and is matched with the opening 51 in a proper fit manner, a notch 11 is arranged on the side edge of the light guide plate 1, and a first bump 61 corresponding to the notch 11 is arranged on the limiting strip 6;

in this embodiment, the rubber housing 3 includes 4 side plates 31 and a rear plate 32 covered by the 4 side plates 31, the size of the light guide plate 1 is the same as that of the rear plate 32, and the light guide plate 1 is placed on the rear plate 32; the limiting strip 6 is arranged in the approaching area of the side plate 31 and the rear plate 32, protrudes back to the rear plate 32, and has the protruding height approaching the height of the side plate 31; a clamping groove 5 is arranged between the side plate 31 and the limiting plate, the depth of the clamping groove 5 is larger than or equal to the width of the PCB 4, the PCB 4 is vertically inserted into the clamping groove 5, and the fixing plate 41 connected to the PCB 4 penetrates out of an opening 51 in the clamping groove 5.

In this embodiment, the number of the limiting strips 6 is 2, the limiting strips 6 facing the clamping grooves 5 are provided with clamping blocks 62 for limiting the movement of the light bars 2, and after the PCB 4 is inserted into the clamping grooves 5, the clamping blocks 62 are abutted to the PCB 4 to limit the PCB 4 in the clamping grooves 5.

In this embodiment, the backlight module further includes a reflective film 7 disposed under the light guide plate 1, a diffusion film 8 disposed on the light guide plate 1, and a light shielding film 9 disposed on the diffusion film 8, wherein the light shielding film 9 is attached to the plastic case 3 and the light bar 2. The sizes of the reflecting film 7 and the diffusion film 8 are consistent with the size of the light guide plate 1. The size of the light shielding film 9 is equal to the area of the rear plate 32 added to one side, and is used for covering the rear plate 32, the side plates 31 near the limiting strips 6 and the light bars 2.

Specifically, in order to better fix the light guide plate 1 in the rubber housing 3, the light guide plate 1 is designed to be rectangular, the rear plate 32 of the rubber housing 3 is set corresponding to the size and the area of the light guide plate 1, two notches 11 are arranged on the side edge of the light guide plate 1 facing the limiting strip, a second bump 12 protruding out of the side edge is arranged on the side edge, a limiting groove 63 is arranged on the limiting strip 6 corresponding to the second bump 12, the second bump 12 is matched with the limiting groove 63 in a fit manner, and the number of the second bumps 12 can be set to be 2;

the light guide plate can be a PMMA light guide plate;

therefore, when the backlight module is assembled, the PCB is arranged on the fixing plate, the light bar is fixed on the PCB, the PCB is inserted into the slot, the fixing plate penetrates through the opening, and the clamping block near the slot limits the PCB in the opening, so that the light bar is fixed in the slot; placing a reflecting film on the rear plate, placing a light guide plate, aligning a second lug on the light guide plate with a limiting groove below the limiting strip, aligning a notch on the light guide plate with a first lug on the limiting strip, pushing the light guide plate close to the limiting strip, and clamping the second lug into the limiting groove; the first bump is clamped into the notch to complete the fixation of the light guide plate. Specifically, the notch on the light guide plate is arranged in the middle of the side edge of the light guide plate, and the position is far away from two far sides of the visual area.

Therefore, the light bar can be stably fixed in the wire slot, so that the problem of light bar looseness caused by personnel mistake is solved, and a dispensing procedure can be cancelled; and the position of the gap of the light guide plate is designed at two sides far away from the visual area, so that the bright spot formed on the gap can be shielded, and the use is not influenced.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The backlight module convenient for simultaneously fixing the lamp strip and the light guide plate is characterized by comprising the light guide plate (1), the lamp strip (2), a rubber shell (3) and a PCB (printed circuit board) plate (4), wherein the light guide plate (1) is arranged on the rubber shell (3), and the lamp strip (2) is arranged between the light guide plate (1) and the rubber shell (3); be provided with draw-in groove (5) and spacing (6) on gluey shell (3), lamp strip (2) set up on PCB board (4), one side of PCB board (4) is connected with fixed plate (41), the lower part of draw-in groove (5) is provided with opening (51) that runs through gluey shell (3) surface, opening (51) and suitable for the cooperation with opening (51) are worn out in fixed plate (41), be provided with breach (11) on the side of light guide plate (1) be provided with first lug (61) that correspond with breach (11) on spacing (6).

2. The backlight module as claimed in claim 1, wherein the plastic case (3) comprises 4 side panels (31) and a rear panel (32) covered by the 4 side panels (31), and the light guide panel (1) has a size same as that of the rear panel (32).

3. The backlight module convenient for fixing a light bar and a light guide plate simultaneously as claimed in claim 2, wherein the light guide plate (1) is disposed on the rear plate (32).

4. The backlight module convenient for fixing the light bar and the light guide plate simultaneously as claimed in claim 2, wherein the slots (5) are arranged in parallel near 1 side plate (31) close to the plastic shell (3), and the depth of the slots (5) is greater than or equal to the width of the PCB (4).

5. The backlight module convenient for fixing the light bar and the light guide plate simultaneously as claimed in claim 1, wherein a clamping block (62) for limiting the movement of the light bar (2) is disposed on the position limiting strip (6) facing the clamping groove (5).

6. The backlight module of claim 1, further comprising a reflective film (7) disposed under the light guide plate (1), a diffusion film (8) disposed on the light guide plate (1), and a light shielding film (9) disposed on the diffusion film (8), wherein the light shielding film (9) is attached to the plastic case (3) and the light bar (2).