CN219832085U

CN219832085U - Vehicle-mounted backlight module and vehicle-mounted display device for improving light effect dark area at edge of display area

Info

Publication number: CN219832085U
Application number: CN202320991581.4U
Authority: CN
Inventors: 陈超; 曹俊威; 刘子平; 冯超
Original assignee: Shenzhen Hadbest Electronics Co ltd
Current assignee: Shenzhen Hadbest Electronics Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-10-13
Anticipated expiration: 2033-04-24

Abstract

The utility model provides a vehicle-mounted backlight module for improving the light effect dark area at the edge of a display area, which comprises a lower frame, a lamp panel, a rubber frame and a diffusion plate, wherein the lower frame comprises a bottom plate and a first side frame fixedly connected to the bottom plate, the lamp panel is arranged on the bottom plate, the rubber frame comprises a connecting part and a bearing part fixedly connected with the connecting part, the connecting part is connected with the first side frame, the bearing part is suspended on the lamp panel, and the diffusion plate is arranged on the bearing part. The vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area can solve the problem that the dark area appears in the VA area, improve the stability of products, reduce the production time and reduce the cost. The utility model also relates to a vehicle-mounted display device.

Description

Vehicle-mounted backlight module and vehicle-mounted display device for improving light effect dark area at edge of display area

Technical Field

The utility model relates to the technical field of display screens, in particular to a vehicle-mounted backlight module for improving a light effect dark area at the edge of a display area and a vehicle-mounted display device.

Background

The application of the intelligent social display screen is wider and wider, along with the popularization application of new energy automobiles, the demand of the direct type vehicle-mounted backlight electronic products is steadily increased, and the electronic products used in daily life are more and more, so that a vehicle-mounted backlight structure with the new vehicle type demand more than 15 inches is frequently generated.

Fig. 1 is a schematic view of a partial cross-sectional structure of a direct type backlight source in the prior art, where the direct type backlight source includes a lower iron frame 21, a lamp panel 22, a supporting frame 23, a diffusion plate 24, an optical film material and an upper frame 25, the lower iron frame 21 includes a bottom plate and a side frame fixedly connected with the bottom plate, the lamp panel 22 is disposed on the bottom plate, the supporting frame 23 is fixed on the bottom plate through a double sided adhesive tape, an avoidance groove 201 is disposed at one end of the supporting frame 23 near the bottom plate, the lamp panel 22 is disposed in the avoidance groove 201, the diffusion plate 24 is disposed on the supporting frame 23, the optical film material is disposed on the diffusion plate 24, and the upper frame 25 is fixedly connected with the lower frame. Because the reliability test requirement of the large-size display screen with the size of more than 15 inches is high, the vehicle-mounted display screen product needs to be subjected to three comprehensive tests, namely the reliability hard requirements of high temperature, high humidity for 100 hours and cold and hot impact for 200 cycles for 100 hours, wherein 200 cycles of cold and hot impact are high-frequency vibration tests, in the three comprehensive tests, because the support frame 23 is fixed on the bottom plate through double-sided tape, the risk of collapse of the diffusion plate 24 easily occurs under different heat expansion and cold contraction environments of the support frame 23 and the diffusion plate 24, so that the screen has annular textures and poor display effect; when the double faced adhesive tape fails, the phenomenon that abnormal sound is easy to occur when the supporting frame 23 and the lower frame collide can reduce the passing rate of the reliability test of the product. In addition, because support frame 23 is directly fixed on the bottom plate, and support frame 23 carries out spacingly to lamp plate 22, there is great clearance between the edge of LED lamp 221 and VA district at lamp plate 22 edge, and D department in both the illustration, clearance scope is 4mm ~ 6mm generally, therefore the dark space phenomenon appears in VA district edge easily, influences the display effect of display screen.

Disclosure of Invention

Therefore, the utility model aims to provide a vehicle-mounted backlight module for improving the light effect dark area at the edge of a display area, which can solve the problem that the dark area appears in a VA area in the prior art, improve the stability of products, reduce the production time and reduce the cost.

The utility model provides a vehicle-mounted backlight module for improving the light effect dark area at the edge of a display area, which comprises a lower frame, a lamp panel, a rubber frame and a diffusion plate, wherein the lower frame comprises a bottom plate and a first side frame fixedly connected to the bottom plate, the lamp panel is arranged on the bottom plate, the rubber frame comprises a connecting part and a bearing part fixedly connected with the connecting part, the connecting part is connected with the first side frame, the bearing part is suspended on the lamp panel, and the diffusion plate is arranged on the bearing part.

In an embodiment, the connecting portion is provided with a connecting groove, the connecting groove is circumferentially arranged around the bearing portion, and the first side frame is arranged in the connecting groove.

In an embodiment, the connecting portion includes a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate is disposed opposite to the third connecting plate, the second connecting plate is vertically connected between the first connecting plate and the third connecting plate, and a connecting slot is formed between the first connecting plate, the second connecting plate and the third connecting plate.

In an embodiment, the first side frame includes relative first surface and the second surface that sets up, and first surface fixed connection is in the bottom plate, and the second surface is equipped with a plurality of recesses, and connecting portion includes first connecting plate and second connecting plate, and the second connecting plate sets up with bearing portion relatively, and first connecting plate fixed connection is between second connecting plate and bearing portion, and the second connecting plate is equipped with a plurality of lugs that correspond the setting with the recess, lug and recess cooperation fixed connection glues frame and lower frame.

In an embodiment, the glue frame is provided with a plurality of reinforcing ribs, each reinforcing rib is fixedly connected to one side of the bearing part, which is close to the lamp panel, and the reinforcing ribs are abutted against or contacted with the first side frame.

In an embodiment, the bearing portion includes a first end face and a second end face which are oppositely disposed, the first end face is fixedly connected to the first connecting plate, and the second end face is disposed corresponding to the lamp bead at the edge of the lamp panel.

In an embodiment, the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further comprises a reflecting film, wherein the reflecting film is fixedly connected to the lamp panel, and the reflecting film is arranged between the lamp panel and the bottom plate.

In an embodiment, the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further comprises an upper frame, wherein the upper frame is fixedly connected to the lower frame, and the upper frame is circumferentially arranged around the lower frame.

In an embodiment, the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further comprises an optical film material, wherein the optical film material is arranged on the reflecting film, and the optical film material is arranged between the upper frame and the glue frame.

The utility model also relates to a vehicle-mounted display device which comprises the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area.

According to the vehicle-mounted backlight module, the rubber frame is fixedly connected with the lower frame, the bearing part of the rubber frame is suspended on the lamp panel, and the rubber frame does not occupy the installation space of the lamp panel, so that when the lamp panel is installed on the bottom plate in the lower frame, the gap between the lamp beads at the edge of the lamp panel and the edge of the VA region can be reduced, and after the display screen is installed on the vehicle-mounted backlight module, the phenomenon of dark areas at the edge of the display screen can be reduced, and the display effect of the display screen is improved; in addition, because gluey frame fixed connection is on first side frame, can solve among the prior art because of the support frame through the problem that the structural stability who leads to on the bottom plate is fixed to the double faced adhesive tape, improve the pass rate of car rule reliability test, improve the stability of product, simultaneously, the assembly man-hour when this gluey frame and the connection mode reducible production of lower frame reduces the use of double faced adhesive tape, practices thrift the cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a partial cross-sectional structure of a direct type backlight of the related art.

Fig. 2 is a schematic partial sectional view of a vehicle-mounted backlight module according to a first embodiment of the present utility model.

Fig. 3 is a schematic bottom view of a rubber frame according to a first embodiment of the present utility model.

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Fig. 5 is a schematic top view of a rubber frame according to a first embodiment of the present utility model.

Fig. 6 is an enlarged schematic view of the structure at B in fig. 5.

Fig. 7 is a schematic diagram of a split structure of a vehicle-mounted backlight module according to a first embodiment of the utility model.

Fig. 8 is a schematic view of a partial cross-sectional structure of a vehicle-mounted backlight module according to a second embodiment of the present utility model.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.

The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.

First embodiment

Fig. 2 is a schematic view of a partially cross-sectional structure of a vehicle-mounted backlight module according to a first embodiment of the present utility model, fig. 3 is a schematic view of a bottom structure of a glue frame according to a first embodiment of the present utility model, fig. 4 is a schematic view of an enlarged structure at a in fig. 3, fig. 5 is a schematic view of a top view of a glue frame according to a first embodiment of the present utility model, fig. 6 is a schematic view of an enlarged structure at B in fig. 5, as shown in fig. 1 to 6, a vehicle-mounted backlight module for improving a marginal light effect of a display area comprises a lower frame 11, a lamp panel 12, a glue frame 13 and a diffusion plate 14, the lower frame 11 comprises a bottom plate 111 and a first side frame 112 fixedly connected to the bottom plate 111, the bottom plate 111 and the first side frame 112 are integrally structured, the lower frame 11 is preferably a die cast, the lamp panel 12 is arranged on the bottom plate 111, the lamp panel 12 is fixedly connected to the bottom plate 111 through a heat conducting double-sided glue, the glue frame 13 comprises a connecting portion 131 and a bearing portion 132 fixedly connected to the connecting portion 131, the connecting portion 131 is connected to the first side frame 112, the bearing portion 132 is suspended to the lamp panel 12, and thus the lamp panel 12 is arranged between the bearing portion 132 and the bottom plate 111 and the diffusion plate 14 is arranged on the bearing portion 132; in this embodiment, the vehicle-mounted backlight module is a direct type backlight module, and the plastic frame 13 is integrally injection molded.

According to the vehicle-mounted backlight module, the rubber frame 13 is fixedly connected with the lower frame 11, and the bearing part 132 of the rubber frame 13 is suspended on the lamp panel 12, so that the rubber frame 13 does not occupy the installation space of the lamp panel 12, when the lamp panel 12 is installed on the bottom plate 111 in the lower frame 11, the gap between the lamp beads 121 at the edge of the lamp panel 12 and the edge of the VA region can be reduced, and after the display screen is installed on the vehicle-mounted backlight module, the phenomenon of dark region at the edge of the display screen can be reduced, and the display effect of the display screen is improved; in addition, because the rubber frame 13 is fixedly connected to the first side frame 112, the problem of poor structural stability caused by the fact that the supporting frame is fixed to the bottom plate 111 through the double-sided adhesive tape in the prior art can be solved, the passing rate of a vehicle gauge reliability experiment is improved, the stability of a product is improved, meanwhile, the connecting mode of the rubber frame 13 and the lower frame 11 can reduce assembly time in production, use of the double-sided adhesive tape is reduced, and cost is saved.

Preferably, the connection portion 131 is provided with a connection groove 101, the connection groove 101 is circumferentially disposed around the bearing portion 132, and the first side frame 112 is disposed in the connection groove 101. Specifically, the connection portion 131 includes a first connection plate 1311, a second connection plate 1312, and a third connection plate 1313, where the first connection plate 1311 is disposed opposite to the third connection plate 1313, the second connection plate 1312 is vertically connected between the first connection plate 1311 and the third connection plate 1313, the bearing portion 132 is fixedly connected to the first connection plate 1311, and a connection groove 101 is formed between the first connection plate 1311, the second connection plate 1312, and the third connection plate 1313, and an end of the first side frame 112, which is far from the bottom plate 111, is disposed in the connection groove 101. When the vehicle-mounted backlight module performs three comprehensive experiments, the connecting part 131 of the rubber frame 13 is fixedly connected to the first side frame 112, so that the stability of the rubber frame 13 is high, the phenomenon of loosening or abnormal sound caused by frequent vibration of the experiments is avoided, the stability of the vehicle-mounted backlight module is improved, and the phenomenon of collapse of the diffusion plate 14 caused by unstable supporting structure is avoided.

Preferably, the glue frame 13 is provided with a plurality of reinforcing ribs 133, each reinforcing rib 133 is fixedly connected to one side of the bearing portion 132 near the lamp panel 12, and the reinforcing rib 133 abuts against or contacts the first side frame 112. In this embodiment, the reinforcing ribs 133 are, for example, triangular, and are used for supporting the bearing portion 132, so that the bearing portion 132 and the diffusion plate 14 can be prevented from collapsing when the vehicle-mounted backlight module is subjected to the reliability test, and the annular texture on the display screen can be prevented from occurring after the vehicle-mounted backlight module is mounted on the display screen.

Preferably, the bearing portion 132 includes a first end surface and a second end surface 132a disposed opposite to each other, the first end surface is fixedly connected to the first connecting plate 1311, and the second end surface 132a is disposed corresponding to the lamp bead 121 at the edge of the lamp panel 12, so that a gap between the lamp bead 121 and the edge of the VA region can be reduced, and a dark region phenomenon can be avoided.

Fig. 7 is a schematic diagram of a split structure of a vehicle-mounted backlight module according to a first embodiment of the present utility model, as shown in fig. 7, the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further includes an upper frame 17, the upper frame 17 is fixedly connected to the lower frame 11, and the upper frame 17 is circumferentially arranged around the lower frame 11. In this embodiment, the upper frame 17 includes a second side frame 171 and a bearing frame 172, the bearing frame 172 is fixedly connected to the second side frame 171, the second side frame 171 is circumferentially disposed around the lower frame 11, and a foam rubber is fixedly connected to the bearing frame 172, and is used for buffering and fixing the display screen.

Preferably, the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further comprises an optical film 16, wherein the optical film 16 is arranged on the reflective film 15, and the optical film 16 is arranged between the upper frame 17 and the rubber frame 13. In this embodiment, when the beads 121 of the light panel 12 are LED lamps, 500 to 600 LED lamps, preferably 550 LED lamps are provided on the light panel 12, and the vehicle-mounted backlight module for improving the light efficiency dark area at the edge of the display area further includes a reflective film 15, wherein the reflective film 15 is fixedly connected to the light panel 12 by a double sided adhesive tape, the reflective film 15 is provided between the light panel 12 and the bottom plate 111, and the reflective film 15 is used for compensating for light loss caused by overlarge gaps between the LED lamps; the lamp panel 12 is provided with a plurality of lamp shades, the lamp shades are horn-shaped, the number of the lamp shades is matched with the number of the lamp beads 121, and each lamp bead 121 is arranged in each lamp shade. The optical film 16 includes a brightness enhancement film, and a DBEF film, where the brightness enhancement film may be connected to the diffusion plate 14 by a double sided tape, the brightness enhancement film may be connected to the brightness enhancement film by a double sided tape, and the DBEF film may be connected to the brightness enhancement film by a double sided tape, for increasing the brightness of the TFT.

In another preferred embodiment, the beads 121 of the light panel 12 are light emitting chips, the light emitting chips can be automatically controlled to emit light, the light emitting chips are electrically connected to the circuit board through SMT to form the light panel 12, the periphery of the light emitting chips are fixed through dispensing, the number of the light emitting chips is 1800-2400, preferably 2000, so that the light source density of the light panel 12 using the light emitting chips is high; the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area further comprises a POD film, wherein the POD film is arranged on the light emitting chip and is used for converting blue light of the light emitting chip into white light. The optical film 16 includes a brightness enhancement film, and a DBEF film, wherein the brightness enhancement film may be connected to the diffusion plate 14 by a double sided tape, the brightness enhancement film may be connected to the brightness enhancement film by a double sided tape, and the DBEF film may be connected to the brightness enhancement film by a double sided tape.

Second embodiment

Fig. 8 is a schematic view of a partial cross-sectional structure of a vehicle-mounted backlight module according to a second embodiment of the present utility model, as shown in fig. 8, the vehicle-mounted backlight module according to the present embodiment is substantially identical to the vehicle-mounted backlight module according to the first embodiment in structure, except that the connection manner between the adhesive frame 13 and the lower frame 11 is different.

Specifically, the first side frame 112 includes a first surface and a second surface 112a that are disposed opposite to each other, the first surface is fixedly connected to the bottom plate 111, the second surface 112a is provided with a plurality of grooves, the grooves are formed by recessing the second surface 112a toward a direction close to the first surface, the connecting portion 131 includes a first connecting plate 1311 and a second connecting plate 1312, the second connecting plate 1312 is disposed opposite to the bearing portion 132, the first connecting plate 1311 is fixedly connected between the second connecting plate 1312 and the bearing portion 132, the second connecting plate 1312 is provided with a plurality of bumps 1314 that are disposed corresponding to the grooves, and the bumps 1314 are matched with the grooves to fixedly connect the rubber frame 13 and the lower frame 11.

The utility model also relates to a vehicle-mounted display device, which comprises the vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area, wherein the vehicle-mounted backlight module is applied to module application of backlight sources such as a high-end vehicle-mounted display screen and TFT glass assembly.

The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims

1. The utility model provides an improve on-vehicle backlight unit in display area edge light effect dark space, its characterized in that includes lower frame (11), lamp plate (12), glues frame (13) and diffuser plate (14), lower frame (11) are in including bottom plate (111) and fixed connection first side frame (112) on bottom plate (111), lamp plate (12) set up on bottom plate (111), glue frame (13) include connecting portion (131) and with connecting portion (131) fixed connection's carrier part (132), connecting portion (131) connect in first side frame (112), carrier part (132) suspension is in on lamp plate (12), diffuser plate (14) set up on carrier part (132).

2. The vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area according to claim 1, wherein the connecting portion (131) is provided with a connecting groove (101), the connecting groove (101) is circumferentially arranged around the bearing portion (132), and the first side frame (112) is arranged in the connecting groove (101).

3. The vehicle-mounted backlight module for improving the light efficiency of the edge of the display area according to claim 2, wherein the connection portion (131) comprises a first connection plate (1311), a second connection plate (1312) and a third connection plate (1313), the first connection plate (1311) and the third connection plate (1313) are arranged opposite to each other, the second connection plate (1312) is vertically connected between the first connection plate (1311) and the third connection plate (1313), and the connection groove (101) is formed between the first connection plate (1311), the second connection plate (1312) and the third connection plate (1313).

4. The vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area according to claim 1, wherein the first side frame (112) comprises a first surface and a second surface (112 a) which are oppositely arranged, the first surface is fixedly connected with the bottom plate (111), the second surface (112 a) is provided with a plurality of grooves, the connecting portion (131) comprises a first connecting plate (1311) and a second connecting plate (1312), the second connecting plate (1312) is oppositely arranged with the bearing portion (132), the first connecting plate (1311) is fixedly connected between the second connecting plate (1312) and the bearing portion (132), the second connecting plate (1312) is provided with a plurality of protruding blocks (1314) which are correspondingly arranged with the grooves, and the protruding blocks (1314) are fixedly connected with the rubber frame (13) and the lower frame (11) in a matched mode.

5. The vehicle-mounted backlight module for improving the light effect of the edge of the display area according to claim 3 or 4, wherein the plastic frame (13) is provided with a plurality of reinforcing ribs (133), each reinforcing rib (133) is fixedly connected to one side of the bearing part (132) close to the lamp panel (12), and the reinforcing rib (133) is abutted against or contacted with the first side frame (112).

6. The vehicle-mounted backlight module for improving the light efficiency of the edge of the display area according to claim 5, wherein the bearing portion (132) comprises a first end face and a second end face (132 a) which are oppositely arranged, the first end face is fixedly connected to the first connecting plate (1311), and the second end face (132 a) is correspondingly arranged with the lamp beads (121) at the edge of the lamp panel (12).

7. The vehicle-mounted backlight module for improving the marginal light effect dark area of the display area according to claim 1, wherein the vehicle-mounted backlight module for improving the marginal light effect dark area of the display area further comprises a reflecting film (15), the reflecting film (15) is fixedly connected to the lamp panel (12), and the reflecting film (15) is arranged between the lamp panel (12) and the bottom plate (111).

8. The vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area according to claim 7, further comprising an upper frame (17), wherein the upper frame (17) is fixedly connected to the lower frame (11), and the upper frame (17) is circumferentially arranged around the lower frame (11).

9. The vehicle-mounted backlight module for improving the light effect dark area at the edge of the display area according to claim 8, further comprising an optical film material (16), wherein the optical film material (16) is arranged on the reflecting film (15), and the optical film material (16) is arranged between the upper frame (17) and the rubber frame (13).

10. A vehicle-mounted display device, comprising the vehicle-mounted backlight module for improving the light efficiency of the edge of a display area according to any one of claims 1 to 9.