CN215067634U

CN215067634U - Vehicle-mounted backlight module

Info

Publication number: CN215067634U
Application number: CN202121161681.1U
Authority: CN
Inventors: 戴光炜
Original assignee: Suzhou Qiwei Electronic Co ltd
Current assignee: Suzhou Qiwei Electronic Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-12-07
Anticipated expiration: 2031-05-27

Abstract

The utility model relates to a backlight display related technical field, in particular to a vehicle-mounted backlight module, which comprises a bottom frame, a positioning plate, a light guide piece, a light source component and a FPC plate, wherein the light guide plate is arranged in the bottom frame; through setting up the backlight unit who comprises underframe, locating plate, light guide plate, leaded light spare, light source subassembly and FPC board combination to there is the protruding structure that the cross-section is triangle-shaped through the edge integrated into one piece at the light guide plate, thereby let light convert irregular diffuse reflection at the traditional regular reflection phenomenon of the border position department of light guide plate, thereby effectively avoid the edge of light guide plate to form light limit phenomenon, and influence backlight unit's optical effect.

Description

Vehicle-mounted backlight module

Technical Field

The utility model relates to a backlight display correlation technique field specifically is an on-vehicle backlight unit.

Background

With the rapid development of the automobile industry, people have increasingly high requirements for vehicle-mounted displays, which have been developed from displays having a conventional single pointer display function to liquid crystal displays having digital and image display functions. However, because the influence of the complicated structure of car and service environment for people also are higher and higher to the requirement of the on-vehicle liquid crystal display module of car's design, for example under car finite space and outside highlight, need the on-vehicle backlight to thin more and the high brightness requirement, therefore the light guide plate in the backlight also will thin more and more, and the heat that the high brightness LED lamp of side income formula produced when light guide plate thickness is too thin, the regional influence of being heated that the light guide plate is close to the LED lamp is great, the regional heat influence of keeping away from the LED lamp is less, thereby easily lead to the deformation of light guide plate, for this reason, the utility model provides an on-vehicle backlight module is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an on-vehicle backlight unit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an on-vehicle backlight unit, includes underframe, locating plate, light guide plate, leaded light spare, light source subassembly and FPC board combination constitution, the light guide plate is for installing among the underframe, the leaded light spare is located the front side of light guide plate and sets up, and the underframe bottom surface is located the lower surface of leaded light spare and has seted up heavy groove, is provided with light source subassembly and FPC board in its notch, the downside that the FPC board is located the light source subassembly sets up, the lower surface of light guide plate is provided with the reflector plate, the upper surface of light guide plate is provided with the blooming, the rectangular channel has been seted up to the heavy tank bottom surface of underframe, and passes in its notch and be provided with the conducting strip, and the laminating of heavy tank bottom surface is provided with the heating panel, and its heating panel leans on to close the setting with FPC board mutually.

Preferably, the light guide plate and the light guide piece are arranged in a leaning and combining manner, and a protective frame is arranged on the outer side of the light guide plate and the outer side of the light guide piece and is an elastic rubber strip.

Preferably, the light guide member is formed by combining a light reflecting strip and a light guide strip, the cross sections of the light reflecting strip and the light guide strip are both right-angled triangles, the cross sections of the light reflecting strip and the light guide strip are combined to form a square, and a light reflecting film is arranged at the intersection position of the light reflecting strip and the light guide strip.

Preferably, the edge of the light guide plate is integrally formed with a plurality of protruding structures, the cross sections of the protruding structures are triangular, and a plurality of groups of the protruding structures are arranged at equal intervals.

Preferably, the FPC board is formed by combining a substrate layer, a circuit layer, a reflective layer, and a heat dissipation layer, the heat dissipation layer is a metal sheet, and the lower surface of the heat dissipation layer is arranged in close contact with the surface of the heat dissipation plate.

Preferably, the heat conducting fins on the heat dissipation plate penetrate through the plate body part of the bottom frame and are arranged for being attached to the lower surface of the bottom frame.

Preferably, the lower side edge of the heat conducting fin is integrally formed with five radiating fins, and the five radiating fins are arranged at equal intervals.

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

1. the backlight module is formed by combining the bottom frame, the positioning plate, the light guide piece, the light source assembly and the FPC plate, and the protruding structure with the triangular section is integrally formed at the edge of the light guide plate, so that the traditional regular reflection phenomenon of light rays at the edge position of the light guide plate is converted into irregular diffuse reflection, and the phenomenon that the edge of the light guide plate forms a light edge to influence the optical effect of the backlight module is effectively avoided;

2. and through set up heating panel and conducting strip in the heavy groove position department of light source subassembly to effectively improve the radiating effect of light source subassembly position department, thereby effectively avoid causing the influence to the light guide plate near the light source subassembly, thereby lead to the problem that its life reduces.

Drawings

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

FIG. 2 is a view showing the position of the light guide plate according to the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a cross-sectional view of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

fig. 6 is a schematic diagram of the structure of the FPC board of the present invention.

In the figure: the bottom frame 1, the locating plate 2, the light guide plate 3, leaded light 4, reflection of light strip 5, leaded light strip 6, protection frame 7, reflector plate 8, blooming 9, light source subassembly 10, FPC board 11, heating panel 12, conducting strip 13, radiating fin 14, base plate layer 15, circuit layer 16, reflection stratum 17, heat dissipation layer 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides an on-vehicle backlight unit, including underframe 1, locating plate 2, light guide plate 3, leaded light spare 4, light source subassembly 10 and FPC board 11 combination constitute, light guide plate 3 is for installing among underframe 1, leaded light spare 4 is located the front side of light guide plate 3 and sets up, and the lower surface that underframe 1 bottom surface is located leaded light spare 4 has seted up heavy groove, be provided with light source subassembly 10 and FPC board 11 in its notch, FPC board 11 is located the downside of light source subassembly 10 and sets up, the lower surface of light guide plate 3 is provided with reflector plate 8, the upper surface of light guide plate 3 is provided with blooming 9, the rectangular channel has been seted up to the heavy groove bottom surface of underframe 1, and pass in its notch and be provided with conducting strip 13, and heavy groove bottom surface laminating is provided with heating panel 12, its heating panel 12 leans on mutually with FPC board 11 and closes the setting.

The light guide plate 3 and the light guide piece 4 are arranged in an abutting mode, a protective frame 7 is arranged on the outer sides of the light guide plate 3 and the light guide piece 4, and the protective frame 7 is an elastic rubber strip and used for protecting the light guide plate 3;

the light guide part 4 is formed by combining a light reflecting strip 5 and a light guide strip 6, the sections of the light reflecting strip 5 and the light guide strip 6 are right-angled triangles, the sections of the light reflecting strip 5 and the light guide strip 6 are combined to form a square, and a light reflecting film is arranged at the intersection position of the light reflecting strip 5 and the light guide strip;

the edge of the light guide plate 3 is integrally formed with a convex structure, the cross section of the convex structure is triangular, a plurality of groups of convex structures are arranged at equal intervals, and the traditional regular reflection phenomenon of light at the edge position of the light guide plate 3 is converted into irregular diffuse reflection by arranging a backlight module formed by combining the bottom frame 1, the positioning plate 2, the light guide plate 3, the light guide piece 4, the light source assembly 10 and the FPC board 11 and integrally forming the convex structure with the triangular cross section at the edge of the light guide plate 3, so that the light edge phenomenon formed at the edge of the light guide plate 3 is effectively avoided, and the optical effect of the backlight module is influenced;

the FPC board 11 is formed by combining a substrate layer 15, a circuit layer 16, a reflecting layer 17 and a heat dissipation layer 18, wherein the heat dissipation layer 18 is a metal sheet, and the lower surface of the heat dissipation layer 18 is arranged close to the surface of the heat dissipation plate 12;

the heat conducting fins 13 on the heat dissipation plate 12 penetrate through the plate body part of the bottom frame 1 to be attached to the lower surface of the bottom frame 1, and the heat dissipation plate 12 and the heat conducting fins 13 are arranged at the position of the sinking groove of the light source assembly 10, so that the heat dissipation effect at the position of the light source assembly 10 is effectively improved, and the problem that the service life of a light guide plate near the light source assembly 10 is shortened due to the influence on the light guide plate is effectively avoided;

the heat radiating fins 14 are integrally formed on the lower side edge of the heat conducting fin 13, and five heat radiating fins 14 are arranged at equal intervals, so that the heat radiating effect of the heat conducting fin 13 is further improved;

the working principle is as follows: by arranging the backlight module which is formed by combining the bottom frame 1, the positioning plate 2, the light guide plate 3, the light guide piece 4, the light source component 10 and the FPC board 11 and integrally forming a convex structure with a triangular section at the edge of the light guide plate 3, so that the conventional regular reflection phenomenon of the light at the edge position of the light guide plate 3 is converted into irregular diffused reflection, thereby effectively avoiding the phenomenon that the edge of the light guide plate 3 forms a light edge to influence the optical effect of the backlight module, and by providing the heat radiating plate 12 and the heat conductive sheet 13 at the sink position of the light source assembly 10, thereby effectively improving the heat dissipation effect at the position of the light source assembly 10, so that the heat generated during the operation of the light source assembly 10 is guided to the heat dissipation plate 12 through the heat dissipation layer 18, and is guided to the heat conductive fins 13 through the heat dissipation plate 12, therefore, heat is dissipated through the heat-conducting sheet 13 and the heat dissipating fins 14 on the heat-conducting sheet 13, so that the influence of the overhigh temperature at the position near the light source assembly 10 on the service life of the backlight module is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an on-vehicle backlight unit, includes underframe (1), locating plate (2), light guide plate (3), leaded light spare (4), light source subassembly (10) and FPC board (11) combination constitution, its characterized in that: light guide plate (3) are for installing among underframe (1), leaded light spare (4) are located the front side of light guide plate (3) and set up, and underframe (1) bottom surface is located the lower surface of leaded light spare (4) and has seted up heavy groove, are provided with light source subassembly (10) and FPC board (11) in its notch, the downside that FPC board (11) are located light source subassembly (10) sets up, the lower surface of light guide plate (3) is provided with reflector plate (8), the upper surface of light guide plate (3) is provided with blooming (9), the rectangular channel has been seted up to the heavy groove bottom surface of underframe (1), and passes in its notch and be provided with conducting strip (13), and heavy groove bottom surface laminating is provided with heating panel (12), and its heating panel (12) lean on mutually with FPC board (11) and set up.

2. The vehicular backlight module according to claim 1, wherein: the light guide plate (3) and the light guide piece (4) are arranged in a leaning and combining mode, the protective frame (7) is arranged on the outer side of the light guide plate (3) and the outer side of the light guide piece (4), and the protective frame (7) is an elastic rubber strip.

3. The vehicular backlight module according to claim 1, wherein: the light guide piece (4) is formed by combining a light reflecting strip (5) and a light guide strip (6), the sections of the light reflecting strip (5) and the light guide strip (6) are right-angled triangles, the sections of the light reflecting strip (5) and the light guide strip (6) are combined to form a square, and a light reflecting film is arranged at the intersection position of the light reflecting strip and the light guide strip.

4. The vehicular backlight module according to claim 1, wherein: the edge of the light guide plate (3) is integrally formed with a convex structure, the cross section of the convex structure is triangular, and a plurality of groups of the convex structure are arranged at equal intervals.

5. The vehicular backlight module according to claim 1, wherein: FPC board (11) comprises base plate layer (15), circuit layer (16), reflection stratum (17) and heat dissipation layer (18) combination, heat dissipation layer (18) are the sheetmetal, and its lower surface and the surface of heating panel (12) are for closing the setting mutually.

6. The vehicular backlight module according to claim 5, wherein: the heat conducting fins (13) on the heat dissipation plate (12) penetrate through the plate body part of the bottom frame (1) and are arranged for being attached to the lower surface of the bottom frame (1).

7. The vehicular backlight module according to claim 6, wherein: the heat-conducting fin structure is characterized in that heat-radiating fins (14) are integrally formed on the lower side edge of the heat-conducting fin (13), and five heat-radiating fins (14) are arranged at equal intervals.