CN108983489B

CN108983489B - Reflective film backlight module with high reflection effect

Info

Publication number: CN108983489B
Application number: CN201810716113.XA
Authority: CN
Inventors: 黄亚斌; 徐仕政
Original assignee: Zhejiang Jinhao Photoelectric Material Co ltd
Current assignee: Zhejiang Jinhao Photoelectric Material Co ltd
Priority date: 2018-07-03
Filing date: 2018-07-03
Publication date: 2022-03-18
Anticipated expiration: 2038-07-03
Also published as: CN108983489A

Abstract

The invention discloses a reflective film backlight module with a high reflection effect, which comprises a module frame, a light guide plate and a reflective film, wherein the light guide plate is arranged inside the module frame, one end of the light guide plate is detachably provided with a support frame, an LED lamp tube is arranged inside the support frame, a scattering film is uniformly paved on the top of the light guide plate, a hard connecting layer is fixed at the bottom of the light guide plate, the bottom of the hard connecting layer is provided with the reflective film, the top of the reflective film is uniformly provided with an arc-shaped groove, a reflective layer is uniformly paved on the inner side wall of the arc-shaped groove, a hard supporting layer is arranged at the bottom of the reflective film, and a second heat conduction layer is arranged at the bottom of the hard supporting layer. According to the invention, the arc-shaped grooves are uniformly formed in the top of the reflecting film, and the reflecting layers formed by the mutual matching of the hexagonal reflectors are uniformly paved on the inner side walls of the arc-shaped grooves, so that the backlight module has higher light utilization rate and can save the energy consumption of the backlight module according to the characteristic that the concave surface has light convergence during reflection.

Description

Reflective film backlight module with high reflection effect

Technical Field

The invention relates to the technical field of display screens, in particular to a reflective film backlight module with a high reflection effect.

Background

With the wide application of electronic products such as mobile phones and tablet computers, users have higher and higher performance requirements on the products, and better user experience is required. At present, the endurance time of the products is the short board of the products, and the display module is one of the main power consumption components. For example, the existing products have a function of automatically increasing brightness in a strong light environment, so that a display screen is still clearly visible in the strong light environment. Although the functions enable users to obtain better outdoor use experience, the consumption of electric energy is accelerated, and the endurance time is shortened seriously.

In addition, the backlight module in the market generally does not have a good heat dissipation structure, the flexible circuit board is attached to the backlight module in the prior art for temperature test, the backlight module without the heat dissipation structure easily causes the phenomenon that heat cannot be rapidly dissipated or the backlight module is locally overheated, certain damage can be caused to components adopting the backlight module liquid crystal display module, and the display effect and the service life of the liquid crystal display module are influenced.

Disclosure of Invention

The present invention is directed to a reflective film backlight module with high reflective effect to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: a reflective film backlight module with high reflection effect comprises a module frame, a light guide plate and a reflective film, wherein a heat conducting sheet is installed at the bottom end inside the module frame, heat radiating fins are uniformly fixed at the bottom of the heat conducting sheet, one ends of the heat radiating fins penetrate through the module frame and extend to the outer side of the module frame, the light guide plate is arranged inside the module frame, a lug is fixed at one end of the light guide plate, limiting bulges are fixed at two ends of the lug, a support frame is detachably installed at the outer side of the lug, an LED lamp tube is installed inside the support frame, an arc-shaped frame is arranged inside the support frame, reflective teeth are uniformly installed on the inner side wall of the arc-shaped frame, U-shaped supports are installed on the support frames at two ends of the arc-shaped frame, clamping grooves matched with the limiting bulges are formed in the outer side of the U-shaped supports, a scattering film is uniformly laid at the top of the light guide plate, and a hard connecting layer is fixed at the bottom of the light guide plate, and the bottom of stereoplasm articulamentum is equipped with the reflectance coating, and the reflectance coating evenly is equipped with first heat-conducting layer with the junction of stereoplasm articulamentum, the top of reflectance coating evenly is equipped with the arc recess, has evenly laid the reflector layer on the inside wall of arc recess, and the inside cavity that all is equipped with of reflectance coating between two adjacent arc recesses, and the rubber body is all installed to the inside of cavity, the bottom of reflectance coating is equipped with the stereoplasm supporting layer, and the bottom of stereoplasm supporting layer is equipped with the second heat-conducting layer, and the bottom and the conducting strip fixed connection of second heat-conducting layer.

Preferably, the limiting protrusion is of a spherical structure, the outer diameter of the limiting protrusion is equal to the inner diameter of the clamping groove, and the limiting protrusion and the clamping groove are matched with each other to form a detachable structure.

Preferably, the inside of "U" type support is installed with reset spring, and reset spring's the other end and support frame fixed connection, and reset spring and "U" type support mutually support and constitute limit structure that resets.

Preferably, the inside of first heat-conducting layer has evenly buried the aluminium oxide granule underground, and the inside of second heat-conducting layer has evenly buried the carbon fiber granule underground, and the aluminium oxide granule all is spherical structure with the carbon fiber granule, and the two sides of first heat-conducting layer and second heat-conducting layer all evenly coated has the optical cement, and the thickness of first heat-conducting layer and second heat-conducting layer equals.

Preferably, the top of the reflecting film outside the arc-shaped groove is uniformly provided with a pasting layer, and the top of the pasting layer is fixedly connected with the bottom of the first heat conducting layer

Preferably, the reflective layer is uniformly provided with hexagonal reflective sheets, and the adjacent sides of each hexagonal reflective sheet are fixedly connected to form a reflective structure.

Preferably, the rubber bodies are spherical structures, and the rubber bodies are matched with each other to form an elastic structure.

Preferably, the cross-section of reflection of light tooth all is equilateral triangle structure, one side and the arc frame inside wall fixed connection of reflection of light tooth, and two other limit of reflection of light tooth mutually support and constitute reflection of light structure.

Preferably, the light guide plate is kept away from the one end of lug and is installed the fixed block, and evenly laid the reflection of light sticky tape between fixed block and the light guide plate.

Preferably, the arc-shaped grooves are spherical surfaces, the diameter of each arc-shaped groove is 1-2mm, the depth of each arc-shaped groove is 0.3-0.5mm, and the arc-shaped grooves are arranged on the surface of the reflecting film in a matrix manner.

Compared with the prior art, the invention has the beneficial effects that: the reflecting film and the backlight module with high reflecting effect have the advantages that the arc-shaped grooves are uniformly arranged at the top of the reflecting film, the reflecting layer formed by the mutual matching of the hexagonal reflectors is uniformly paved on the inner side wall of each arc-shaped groove, according to the characteristic that the concave surface has light convergence during reflection, light emitted from a certain position in the light guide plate can reach the light-emitting surface of the light guide plate more after being reflected by the reflecting film, the reflecting film has higher light utilization rate under the same condition, the energy consumption of the backlight module can be saved, the endurance time of an electronic product adopting the backlight module is prolonged, cavities are arranged inside the reflecting film between the arc-shaped grooves, rubber bodies are arranged inside the cavities, the elasticity and the retentivity of the reflecting film are increased, the reflecting film is prevented from being bent, the reflecting film is convenient to rebound under pressure, the damage is avoided, and first heat conducting layers are uniformly arranged at the connecting positions of the reflecting film and the hard connecting layer, the second heat conduction layer is uniformly arranged between the hard support layer and the heat conduction sheet, the aluminum oxide particles and the carbon fiber particles in the first heat conduction layer and the second heat conduction layer have excellent heat conduction capability and are matched with the radiation heat dissipation of the spherical structure, so that the heat is rapidly conducted to each area of the film body, the film body is uniformly heated, and the deformation phenomena of bending, folding and the like of the film body caused by nonuniform heating are effectively solved. U-shaped brackets are arranged on the supporting frames, clamping grooves matched with limiting bulges at two ends of the convex blocks are arranged on the outer sides of the U-shaped brackets, so that the supporting frames and the light guide plate can be conveniently and quickly assembled and disassembled, in addition, the arc-shaped frame is arranged on the inner side of the supporting frame, the reflecting teeth are uniformly arranged on the inner side wall of the arc-shaped frame and are matched with each other to form a reflecting structure, and the brightness is increased under the same energy consumption.

Drawings

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

FIG. 2 is a schematic view of the structure of the connection between the supporting frame and the light guide plate according to the present invention;

FIG. 3 is a schematic view of a partially enlarged structure of a connection portion between a support frame and a light guide plate according to the present invention;

FIG. 4 is a schematic view of the structure of the joint between the light guide plate and the fixing block according to the present invention;

FIG. 5 is a top view of the reflective film of the present invention;

fig. 6 is a partial sectional view of the inside of the present invention.

In the figure: 1. a heat conductive sheet; 2. a support frame; 3. an LED lamp tube; 4. a first thermally conductive layer; 5. a light guide plate; 6. a scattering film; 7. a hard connecting layer; 8. a reflective film; 9. a second thermally conductive layer; 10. a module frame; 11. a heat dissipating fin; 12. a reflective tooth; 13. an arc-shaped frame; 14. a return spring; 15. a card slot; 16. a U-shaped bracket; 17. a limiting bulge; 18. a bump; 19. carbon fiber particles; 20. an arc-shaped groove; 21. a rubber body; 22. a bonding layer; 23. alumina particles; 24. a cavity; 25. a light-reflecting layer; 26. a hexagonal reflective sheet; 27. a reflective tape; 28. a fixed block; 29. a hard support layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention is shown: a reflective film backlight module with high reflection effect comprises a module frame 10, a light guide plate 5 and a reflective film 8, wherein a heat conducting sheet 1 is installed at the bottom end inside the module frame 10, heat radiating fins 11 are uniformly fixed at the bottom of the heat conducting sheet 1, one ends of the heat radiating fins 11 all penetrate through the module frame 10 and extend to the outer side of the module frame 10, the light guide plate 5 is arranged inside the module frame 10, a lug 18 is fixed at one end of the light guide plate 5, limiting bulges 17 are fixed at two ends of the lug 18, a support frame 2 is detachably installed at the outer side of the lug 18, an LED lamp tube 3 is installed inside the support frame 2, an arc frame 13 is arranged inside the support frame 2, reflective teeth 12 are uniformly installed on the inner side wall of the arc frame 13, the cross sections of the reflective teeth 12 are all of equilateral triangle structures, one side of the reflective teeth 12 is fixedly connected with the inner side wall of the arc frame 13, and the other two sides of the reflective teeth 12 are mutually matched to form a reflective structure, a fixing block 28 is arranged at one end of the light guide plate 5 far away from the bump 18, a reflective adhesive tape 27 is uniformly laid between the fixing block 28 and the light guide plate 5, U-shaped brackets 16 are arranged on the support frames 2 at the two ends of the arc-shaped frame 13, a reset spring 14 is arranged inside the U-shaped bracket 16, the other end of the reset spring 14 is fixedly connected with the support frames 2, the reset spring 14 and the U-shaped brackets 16 are mutually matched to form a reset limiting structure, so that the support frames 2 and the light guide plate 5 can be quickly connected and fixed, clamping grooves 15 matched with the limiting bulges 17 are arranged on the outer side of the U-shaped bracket 16, the limiting bulges 17 are of a spherical structure, the outer diameter of the limiting bulges 17 is equal to the inner diameter of the clamping grooves 15, the limiting bulges 17 and the clamping grooves 15 are mutually matched to form a detachable structure, so that the support frames 2 can be conveniently mounted and dismounted, thereby facilitating the maintenance of the LED lamp tube 3, a scattering film 6 is uniformly laid on the top of the light guide plate 5, the bottom of the light guide plate 5 is fixed with a hard connecting layer 7, the bottom of the hard connecting layer 7 is provided with a reflecting film 8, the joint of the reflecting film 8 and the hard connecting layer 7 is uniformly provided with a first heat conducting layer 4, the top of the reflecting film 8 is uniformly provided with an arc groove 20, the arc groove 20 is a spherical surface, the diameter of the arc groove 20 is 1-2mm, the depth of the arc groove 20 is 0.3-0.5mm, the arc grooves 20 are arranged on the surface of the reflecting film 8 in a matrix manner, the top of the reflecting film 8 outside the arc groove 20 is uniformly provided with an adhesive layer 22, the top of the adhesive layer 22 is fixedly connected with the bottom of the first heat conducting layer 4, the inner side wall of the arc groove 20 is uniformly paved with a reflecting layer 25, the reflective layer 25 is uniformly provided with six-edge reflective sheets 26, and the adjacent edges of each six-edge reflective sheet 26 are fixedly connected to form a reflective structure, so as to increase the reflectivity of the reflecting film 8, and cavities 24 are arranged inside the reflective films 8 between two adjacent arc grooves 20, the rubber bodies 21 are arranged inside the cavity 24, the rubber bodies 21 are of a spherical structure, the rubber bodies 21 are matched with each other to form an elastic structure, the elasticity of the reflecting film 8 is increased, the reflecting film 8 is prevented from being bent, the reflecting film 8 is convenient to rebound under pressure, the bottom of the reflecting film 8 is provided with a hard supporting layer 29, the bottom of the hard supporting layer 29 is provided with a second heat conducting layer 9, the bottom of the second heat conducting layer 9 is fixedly connected with the heat conducting sheet 1, the two surfaces of the first heat conducting layer 4 and the second heat conducting layer 9 are uniformly coated with optical cement, the thicknesses of the first heat conducting layer 4 and the second heat conducting layer 9 are equal, aluminum oxide particles 23 are uniformly embedded inside the first heat conducting layer 4, carbon fiber particles 19 are uniformly embedded inside the second heat conducting layer 9, the aluminum oxide particles 23 and the carbon fiber particles 19 are of a spherical structure, and the aluminum oxide particles 23 and the carbon fiber particles 19 have excellent heat conducting capability, the radiation heat dissipation of cooperation globular structure for the quick conduction of heat is to each region of the membrane body, and the membrane body is heated evenly, solves the membrane body effectively because of being heated the bending that the inequality leads to, deformation phenomena such as fold.

The working principle is as follows: when the light guide plate is used, the support frame 2 is arranged at one end of the light guide plate 5, the support frame 2 and the light guide plate 5 are quickly arranged under the elastic action of the reset spring 14 through the mutual matching of the clamping grooves 15 arranged at the outer side of the U-shaped support 16 at the inner side of the support frame 2 and the limiting bulges 17 at the two ends of the convex block 18, meanwhile, the light guide plate 5 is fixed in the module frame 10, as the reflecting teeth 12 are uniformly fixed on the arc-shaped frame 13 at the inner side of the support frame 2 to form a reflecting structure in a mutual matching manner, under the same energy consumption, the brightness is increased, in the using process, the reflecting layer 25 formed by the mutual matching of the six-edge reflecting sheets 26 is uniformly paved on the inner side wall of the arc-shaped groove 20 uniformly arranged at the top of the reflecting film 8, according to the characteristic that the concave surface has light convergence when reflecting, more light can reach the light emergent surfaces of the light guide plate 5, and the reflecting film 8 has higher light utilization rate under the same condition, in addition, 8 cavities 24 of reflectance coating are equipped with the rubber body 21, be convenient for increase the elasticity and the retentivity of reflectance coating 8, avoid reflectance coating 8 to bend, be convenient for reflectance coating 8 pressurized resilience, avoid the damage, and simultaneously, the inside aluminium oxide granule 23 of first heat-conducting layer 4 and second heat-conducting layer 9 and the equal excellent heat conductivility of carbon fiber granule 19, the radiation heat dissipation of cooperation globular structure, each region that the quick conduction of heat extremely arrives, be heated evenly, solve effectively because of being heated the bending that the inequality leads to, deformation phenomena such as fold.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a backlight unit of high reflection effect reflectance coating, includes module frame (10), light guide plate (5) and reflectance coating (8), its characterized in that: the LED lamp is characterized in that a heat conducting sheet (1) is installed at the bottom end inside the module frame (10), heat radiating fins (11) are uniformly fixed at the bottom of the heat conducting sheet (1), one ends of the heat radiating fins (11) penetrate through the module frame (10) and extend to the outer side of the module frame (10), a light guide plate (5) is arranged inside the module frame (10), a convex block (18) is fixed at one end of the light guide plate (5), limiting bulges (17) are fixed at two ends of the convex block (18), a support frame (2) is detachably installed at the outer side of the convex block (18), an LED lamp tube (3) is installed inside the support frame (2), an arc-shaped frame (13) is arranged inside the support frame (2), reflecting teeth (12) are uniformly installed on the inner side wall of the arc-shaped frame (13), U-shaped supports (16) are installed on the support frames (2) at two ends of the arc-shaped frame (13), clamping grooves (15) matched with the limiting bulges (17) are arranged outside the U-shaped supports (16), scattering films (6) are uniformly laid on the top of the light guide plate (5), a hard connecting layer (7) is fixed at the bottom of the light guide plate (5), and the bottom of the hard connecting layer (7) is provided with a reflecting film (8), the joint of the reflecting film (8) and the hard connecting layer (7) is uniformly provided with a first heat conducting layer (4), the top of the reflecting film (8) is uniformly provided with arc-shaped grooves (20), the inner side walls of the arc-shaped grooves (20) are uniformly paved with reflecting layers (25), and the inner parts of the reflecting films (8) between two adjacent arc-shaped grooves (20) are all provided with cavities (24), the inner parts of the cavities (24) are all provided with rubber bodies (21), a hard supporting layer (29) is arranged at the bottom of the reflecting film (8), a second heat conducting layer (9) is arranged at the bottom of the hard supporting layer (29), and the bottom of the second heat conduction layer (9) is fixedly connected with the heat conduction sheet (1).

2. The backlight module of claim 1, wherein: spacing arch (17) are the spheroid structure, and the external diameter of spacing arch (17) equals with the internal diameter of draw-in groove (15), and spacing arch (17) and draw-in groove (15) mutually support and constitute detachable construction.

3. The backlight module of claim 1, wherein: the U-shaped support (16) is internally provided with a return spring (14), the other end of the return spring (14) is fixedly connected with the support frame (2), and the return spring (14) and the U-shaped support (16) are mutually matched to form a return limiting structure.

4. The backlight module of claim 1, wherein: aluminium oxide granule (23) have evenly been buried underground to the inside of first heat-conducting layer (4), and carbon fiber granule (19) have evenly been buried underground to the inside of second heat-conducting layer (9), and aluminium oxide granule (23) all are spherical structure with carbon fiber granule (19), and the both sides of first heat-conducting layer (4) and second heat-conducting layer (9) all evenly coat has the optical cement, and the thickness of first heat-conducting layer (4) and second heat-conducting layer (9) equals.

5. The backlight module of claim 1, wherein: the top of the reflecting film (8) outside the arc-shaped groove (20) is uniformly provided with a pasting layer (22), and the top of the pasting layer (22) is fixedly connected with the bottom of the first heat conducting layer (4).

6. The backlight module of claim 1, wherein: the light reflecting layer (25) is uniformly provided with six-edge light reflecting sheets (26), and the adjacent edges of each six-edge light reflecting sheet (26) are fixedly connected to form a light reflecting structure.

7. The backlight module of claim 1, wherein: the rubber bodies (21) are of spherical structures, and the rubber bodies (21) are matched with each other to form an elastic structure.

8. The backlight module of claim 1, wherein: the cross section of the reflecting tooth (12) is of an equilateral triangle structure, one side of the reflecting tooth (12) is fixedly connected with the inner side wall of the arc-shaped frame (13), and the other two sides of the reflecting tooth (12) are matched with each other to form a reflecting structure.

9. The backlight module of claim 1, wherein: and a fixing block (28) is arranged at one end, far away from the bump (18), of the light guide plate (5), and a reflective adhesive tape (27) is uniformly laid between the fixing block (28) and the light guide plate (5).

10. The backlight module of claim 1, wherein: the arc-shaped grooves (20) are spherical surfaces, the diameters of the arc-shaped grooves (20) are 1-2mm, the depths of the arc-shaped grooves (20) are 0.3-0.5mm, and the arc-shaped grooves (20) are arranged on the surface of the reflecting film (8) in a matrix manner.