CN201269497Y - Box base of direct type backlight module - Google Patents

Abstract

The utility model relates to a straight following formula backlight module's box seat, it includes main part and reflection stratum. The main body is provided with a substrate and a ring frame, the ring frame is positioned on the periphery of the substrate and defines an accommodating space for accommodating the luminous source, and the ring frame and the substrate are made of plastic materials. The reflecting layer is positioned on the surface of the ring frame and the substrate facing the accommodating space and used for reflecting light rays emitted by the light emitting source. Therefore, the box base is made of plastic and does not contain any metal, so that the overall weight can be effectively reduced.

Description

Box holder for direct type backlight module

technical field

The utility model relates to a box seat of a direct-down type backlight module, in particular to a fully plasticized box seat of a direct-down type backlight module.

Background technique

Referring to Figures 1 and 2, there are schematic diagrams showing the decomposition and assembly of a conventional direct-lit backlight module, respectively. Also refer to FIGS. 3 and 4 , which are schematic cross-sectional views of the conventional direct-lit backlight module of FIG. 2 along line 3 - 3 and line 4 - 4 , respectively. The conventional direct-lit backlight module 1 includes a box base 2 , a diffusion plate 11 and a light source 12 . The box holder 2 includes a main body 21 and a reflective layer 22 . The body 21 has a metal base 211 and two plastic side walls 212 . The metal base 211 includes a substrate 2111 and two extension walls 2112 , and the extension walls 2112 extend upward from two sides of the substrate 2111 . Usually, the metal base 211 is stamped from a metal sheet. The plastic side walls 212 are respectively fixed on the other two sides of the substrate 2111 and connected to the extension walls 2112 so that the main body 21 forms a quadrilateral shape. The plastic side wall 212 , the substrate 2111 and the extension wall 2112 define an accommodating space 23 for accommodating the light emitting source 12 . The light source 12 is a plurality of cold cathode fluorescent lamps (CCFL).

The reflective layer 22 is located on the surfaces of the plastic side wall 212 , the substrate 2111 and the extension wall 2112 facing the accommodating space 23 for reflecting the light emitted by the light emitting source 12 .

The usage state of the conventional direct-lit backlight module 1 is as follows, part of the light emitted by the light source 12 will be directly projected to the diffuser plate 11 , and then projected to the liquid crystal panel 3 after being diffused and mixed. Another part of the light will be projected on the box base 2, reflected to the diffuser plate 11 through the reflective layer 22 in the box base 2, and projected to the liquid crystal panel 3 after diffusion and light mixing. .

In the conventional direct-lit backlight module 1 , the metal base 211 is made of metal, and its area occupies a relatively high proportion of the entire backlight module 1 , so that the weight of the backlight module 1 cannot be effectively reduced. In particular, the size of today's liquid crystal displays is getting larger and larger, and the required backlight module is also larger, so the overall weight will also be heavier.

Therefore, it is necessary to provide an innovative and progressive direct-lit backlight module box holder to solve the above problems.

Utility model content

The utility model provides a box seat of a direct-down type backlight module, which comprises a main body and a reflection layer. The main body has a substrate and a ring frame. The ring frame is located on the periphery of the substrate and defines an accommodation space for accommodating a light source. The ring frame and the substrate are both made of plastic material. The reflective layer is located on the surface of the ring frame and the substrate facing the accommodating space, and is used for reflecting the light emitted by the light emitting source. Thereby, since the material of the box base is all plastic without any metal, the overall weight can be effectively reduced.

Description of drawings

FIG. 1 shows an exploded schematic view of a conventional direct-lit backlight module;

FIG. 2 shows a combined schematic diagram of a conventional direct-lit backlight module;

FIG. 3 shows a schematic cross-sectional view of the conventional direct-lit backlight module of FIG. 2 along line 3-3;

FIG. 4 shows a schematic cross-sectional view of the conventional direct-lit backlight module of FIG. 2 along line 4-4;

FIG. 5 shows an exploded schematic view of a preferred embodiment of the direct-lit backlight module of the present invention;

FIG. 6 shows a schematic cross-sectional view along line 6-6 of the direct-type backlight module of the present invention assembled in FIG. 5; and

FIG. 7 shows a schematic cross-sectional view along line 7 - 7 of the assembled direct-type backlight module of the present invention in FIG. 5 .

Detailed ways

Referring to FIG. 5 , it shows an exploded view of a preferred embodiment of the direct-lit backlight module of the present invention. Referring to FIGS. 6 and 7 , there are respectively shown cross-sectional schematic diagrams along line 6 - 6 and line 7 - 7 of the assembled direct type backlight module of the present invention in FIG. 5 . The direct type backlight module 4 of the present invention includes a box seat 5 , a diffusion plate 41 and a light source 42 . The box seat 5 includes a main body 51 and a reflective layer 52 .

The main body 51 has a substrate 511 and a ring frame 512 . The ring frame 512 is located on the periphery of the substrate 511 and defines an accommodating space 53 for accommodating the light source 42 . Both the ring frame 512 and the substrate 511 are made of plastic, and the two materials can be the same or different. In this embodiment, the ring frame 512 and the substrate 511 are integrally formed. Preferably, the main body 51 is formed by injection molding. However, it can be understood that the ring frame 512 and the substrate 511 can be fabricated separately and then assembled into the main body 51 . The reflective layer 52 is located on the surfaces of the ring frame 512 and the substrate 511 facing the accommodating space 53 , for reflecting the light emitted by the light source 42 .

In this embodiment, the periphery of the substrate 511 has four sides, and the ring frame 512 extends upwards from the four sides to form four side walls, so that the main body 51 forms a quadrilateral shape, and the accommodating space 53 opens toward superior. The reflective layer 52 is located on four sidewalls of the ring frame 512 .

In this embodiment, the light source 42 is a plurality of cold cathode fluorescent lamps (CCFL). The ring frame 512 has at least one opening 5121 for the ends of the CCFLs to protrude. In addition, it can be understood that the light source 42 may also be a light emitting diode (LED) or other light sources that can emit light.

The plastic material of the main body 51 is selected from fluorocarbon resin, silicone resin, acrylic resin, alkyd resin, styrene resin, polyolefin resin, polycarbonate resin, nylon resin, polyester resin and mixtures thereof group.

Preferably, the main body 51 further adds a reinforcing material, and the reinforcing material is selected from the group consisting of calcium carbonate, reinforcing fiber, titanium dioxide, talcum powder, mica, barium sulfate, zinc oxide and mixtures thereof.

Preferably, the plastic material of the main body 51 is a mixture of polycarbonate resin (Polycarbonate, PC) and crystalline polymer (Crystalline Polymer), and the reinforcing material is titanium dioxide. Wherein said crystalline polymer is selected from polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polyethylene terephthalate (Polyethylene Terephthalate, PET), nylon (Nylon), polyamide (Polyamide) , polyester (Polyester), polyurethane (Polyurethane, PU), polyolefin (Polyolefin), ethylene-vinylacetate copolymer (Ethylene-vinylacetate copolymer, EVA) and a group consisting of mixtures thereof.

Preferably, for the requirement of electric conduction, the substrate 511 or the ring frame 512 is further doped with a plurality of conductive particles, and the material of the conductive particles is conductive carbon black or carbon fiber. Alternatively, another conductive method is that the surface of the substrate 511 or the ring frame 512 further includes a conductive layer coated on the surface of the substrate or the ring frame 512, and the material of the conductive layer is a conductive polymer.

The reflective layer 52 includes a resin substrate, a light stabilizer (Light Sabilizer) and a white reflector, wherein the resin substrate is selected from acrylic resin, polyurethane resin, epoxy resin, alkyd resin, unsaturated polyester resin and its mixtures. In addition, the resin base material may be a water-soluble, oil-soluble, one-component or two-component resin.

The light stabilizer is selected from the group consisting of amine type (Amine type) compound, hindered amine type (Hindered Amine type) compound, salicylic acid type (Salicyl type) compound, triazole methylbenzene type (Benzortriazole type) compound, diphenylmethane A group consisting of Benzopherone type compounds, metal nickel (Nickel) chelates (Chelate) and their mixtures. The photostabilizer is also a light shielding agent, a UV absorber (UV Absorber), an excited state quencher or a free radical scavenger, which is a material with the characteristics of absorbing ultraviolet light, and has the ability to absorb UV rays with a wavelength below 400nm. It can be used to decompose the free radicals generated during UV irradiation, so as to avoid the deterioration and yellowing of the resin substrate due to damage by free radicals.

The white reflector is selected from the group consisting of titanium dioxide, zinc oxide, calcium carbonate, barium sulfate, talc and mixtures thereof.

In the present invention, the manufacturing method of the box seat 5 includes but not limited to the following four methods. The first manufacturing method is that the main body 51 and the reflective layer 52 are formed by two-color injection molding. That is, the reflective layer 52 and the main body 51 are sequentially injected into the mold to form the box seat 5 with the reflective layer 52 bonded to the main body 51 .

The second manufacturing method is to firstly manufacture the main body 51 by injection molding, and then attach the molded reflective layer 52 film to the main body 51 .

The third manufacturing method is to firstly manufacture the main body 51 by injection molding, and then coat the reflective layer 52 on the main body 51 .

The fourth manufacturing method is to first attach the molded reflective layer 52 film in the mold, and then use an injection molding machine to inject plastic into the mold to form the main body 51, and at the same time make the main body 51 and the main body 51 The reflective layer 52 is combined together.

In the direct type backlight module 4 , the main body 51 of the box base 5 is all made of plastic without any metal material, so it is also called a fully plasticized main body 51 . In addition, the reflective layer 52 is also made of plastic material, so the box base 5 can also be called a fully plasticized box base 5, which has the advantage of light weight. Even though the size of today's liquid crystal displays is getting larger and larger, the required backlight module is also larger, and the overall weight can be effectively controlled.

It is hoped that the above-mentioned embodiments only illustrate the principles and effects of the present utility model, rather than limiting the present utility model. Therefore, those skilled in the art can make modifications and changes to the above-mentioned embodiments without departing from the spirit of the present invention. The scope of rights of the utility model should be as listed in the appended claims.

Claims (21)

1. A box seat of a direct type backlight module, characterized in that it comprises: a main body, which has a substrate and a ring frame, the ring frame is located on the periphery of the substrate, and defines an accommodation space for accommodating a light source, and both the ring frame and the substrate are made of plastic material; and A reflective layer, located on the surface of the ring frame and the substrate facing the containing space, is used to reflect the light emitted by the light emitting source. 2. The cassette holder according to claim 1, wherein the ring frame and the substrate are integrally formed. 3. The box seat according to claim 1, wherein the periphery of the substrate is four sides, and the ring frame extends upwards from the four sides to form four side walls, so that the The main body forms a tetragonal shape. 4. The box seat according to claim 1, wherein the plastic material is selected from fluorocarbon resin, silicone resin, acrylic resin, alkyd resin, styrene resin, polyolefin resin, polycarbonate Resins, nylon-based resins, polyester resins and their mixtures. 5. The box seat according to claim 1, characterized in that, the main body further adds a reinforcing material, and the reinforcing material is selected from calcium carbonate, reinforcing fiber, titanium dioxide, talcum powder, mica, barium sulfate, zinc oxide and other A group of mixtures. 6. The cassette holder according to claim 1, wherein the main body is formed by injection molding. 7. The box holder according to claim 1, wherein the main body and the reflective layer are formed by two-color injection molding. 8. The box holder according to claim 1, wherein the reflective layer is adhered to the main body. 9. The cartridge holder according to claim 1, wherein the reflective layer is coated on the main body. 10. The cassette holder according to claim 1, wherein the reflective layer comprises a resin substrate, a light stabilizer and a white reflective agent. 11. The box seat according to claim 10, wherein the resin substrate is selected from the group consisting of acrylic resin, polyurethane resin, epoxy resin, alkyd resin, unsaturated polyester resin and mixtures thereof Group. 12 . The cassette holder according to claim 10 , wherein the resin base material can be water-soluble, oil-soluble, one-component or two-component resin. 13 . 13. The box seat according to claim 10, wherein the light stabilizer is selected from the group consisting of amine compounds, hindered amine compounds, salicylic acid compounds, triazole methylbenzene compounds, benzophenone A group consisting of compounds, metal nickel chelates and mixtures thereof. 14. The box holder according to claim 10, wherein the white reflector is selected from the group consisting of titanium dioxide, zinc oxide, calcium carbonate, barium sulfate, talc and mixtures thereof. 15. The cassette holder according to claim 1, wherein the ring frame of the main body has at least one opening. 16. The box holder according to claim 1, wherein the light emitting source is a cold cathode fluorescent tube or a light emitting diode. 17. The cassette holder according to claim 1, wherein the substrate is further doped with a plurality of conductive particles, and the material of the conductive particles is conductive carbon black or carbon fiber. 18. The cartridge holder according to claim 1, wherein the ring frame is further doped with a plurality of conductive particles, and the material of the conductive particles is conductive carbon black or carbon fiber. 19. The cassette holder according to claim 1, wherein the surface of the substrate further comprises a conductive layer coated on the surface of the substrate, and the conductive layer is made of conductive polymer. 20. The cassette holder according to claim 1, wherein the surface of the ring frame further comprises a conductive layer coated on the surface of the ring frame, and the material of the conductive layer is a conductive polymer. 21. The box seat according to claim 5, wherein the plastic material of the main body is a mixture of polycarbonate resin and crystalline polymer, and the reinforcing material is titanium dioxide, and the crystalline polymer The material is selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, nylon, polyamide, polyester, polyurethane, polyolefin, ethylene-vinyl acetate copolymer, and mixtures thereof.

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