CN201803313U

CN201803313U - Diffusion plate and backlight module group adopting the same

Info

Publication number: CN201803313U
Application number: CN2010205633205U
Authority: CN
Inventors: 张建林; 张黎明
Original assignee: SUZHOU TUOXIAN PHOTOELECTRIC MATERIAL CO Ltd
Current assignee: SUZHOU TUOXIAN PHOTOELECTRIC MATERIAL CO Ltd
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-04-20
Anticipated expiration: 2020-10-15

Abstract

The utility model provides a diffusion plate, which at least comprises a first layer, a second layer and a third layer, wherein the two adjacent layers are made of different materials, the three layers are formed into an integral structure through integral extruding forming, the first layer is made of polymethylmethacrylate or polymethylmethacrylate multipolymers, the second layer is made of polystyrene, and the third layer is made of polymethylmethacrylate or polymethylmethacrylate multipolymers. Compared with the prior art, the diffusion plate of the utility model improves the diffusion performance during light ray penetration without adding light diffusion ions and reduces the manufacture cost of the diffusion plate and the backlight module group.

Description

Diffuser plate and use the module backlight of this diffuser plate

Technical field

The utility model relates to the diffuser plate of a kind of module backlight and use thereof, relates in particular to a kind of be applied to module backlight and diffuser plate thereof on the LCDs.

Background technology

The non-luminous display unit of LCDs itself needs the configuration backlight can realize the effect that shows.Traditional LCDs comprises a liquid crystal panel and a module backlight, by module backlight light is guided on the liquid crystal panel, makes liquid crystal panel luminous.

Module backlight generally includes reflector plate, the LGP that is positioned at the reflector plate top of being located at the bottom, diffuser plate and the backlight of being located at the LGP top.Common module backlight can be divided into side light-source type and two kinds of straight light-source types down according to the position that is provided with of backlight.So-called side light-source type is one-sided or many sides set-point light source in module backlight, and the emitted light of light source is via the guiding of LGP and the reflection of reflector plate, and imports the diffuser plate scattering, and injects on the liquid crystal panel, makes liquid crystal panel produce brightness and shows.And so-called straight down light-source type is the light source that emission is set by the bottom at module backlight, evenly spreads the base point light source or line source obtains area source by diffuser plate, for LCD provides light source.

At present, diffuser plate on the market is made by the acrylic material usually and is single layer structure, in order to increase the light diffusing energy of diffuser plate, has increased the higher fluorescence blast additive of cost usually in diffuser plate, this has not only increased the manufacturing cost of diffuser plate, does not also meet environmental protection trend.

In view of this, be necessary to provide a kind of novel diffuser plate to address the above problem.

The utility model content

At the defective of prior art, the technical problem that the utility model solved is to provide a kind of diffuser plate, and it can effectively improve the diffusivity to light.

For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that a kind of diffuser plate, this diffuser plate comprises ground floor, the second layer and the 3rd layer, described ground floor, the second layer and the 3rd layer of setting of fitting each other, and the material difference of adjacent two layers, these three layers form integrative-structure through the one extrusion molding, the material of described ground floor is polymethyl methacrylate or its copolymer, the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.

Further, described ground floor is provided with the micro-structural that some sizes, shape are all identical and be evenly distributed.

Further, described diffuser plate comprises further and the 4th layer and layer 5 of described three layers of one extrusion molding that the 4th layer material is a polystyrene, and the material of layer 5 is a polymethyl methacrylate.

Further, the ratio of the thickness of described ground floor and the thickness of the second layer is between 0.01 to 1, and the ratio of described threeply degree and second layer thickness is between 0.01 to 1.

Further, the thickness of ground floor equates with the 3rd layer thickness.

The technical solution of the utility model can also be achieved in that a kind of module backlight, comprise a diffuser plate and light source, described diffuser plate comprises ground floor, the second layer and the 3rd layer, described ground floor, the second layer and the 3rd layer of setting of fitting each other, and the material difference of adjacent two layers, these three layers form integrative-structure through the one extrusion molding, the material of described ground floor is polymethyl methacrylate or its copolymer, the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.

Further, described light source is positioned at a side of the described second layer.

Further, described ground floor, the 3rd layer are equipped with smooth inner surface and outer surface.

Compared with prior art, the beneficial effects of the utility model are: improved the diffusivity when light passes diffuser plate, and need not to add the light diffusion ion, reduced the manufacturing cost of diffuser plate and module backlight.

Description of drawings

Fig. 1 is the structural representation of module backlight described in the utility model.

Fig. 2 is the structural representation of the diffuser plate of module backlight described in the utility model.

Fig. 3 is the structural representation of module group diffusing board backlight in the another kind of embodiment of the utility model.

The specific embodiment

The utility model provides a kind of modified form diffuser plate 20 that is applied on the liquid crystal panel backlight module.As shown in Figure 1, described module backlight 100, it comprises LGP 10, be located at the diffuser plate 20 of described LGP 10 tops, diffusion barrier 30 and produce the light source 40 of light, the light of described light source 40 is successively by LGP 10, diffuser plate 20 and diffusion barrier 30, and be directed to (not shown) on the described liquid crystal panel, make liquid crystal panel luminous.

See also shown in Figure 2ly, described LGP 10 places the below of described diffuser plate 20, and its major function is to guide radiation direction, with the brightness that improves liquid crystal panel and the uniformity of control light.

Diffuser plate 20 described in the utility model passes through the one extrusion molding by the multilayer material, see also shown in Figure 2, described diffuser plate 20 comprises ground floor 13, the second layer 12, the 3rd layer 14, the 4th layers 15 and layer 5 16, the material of described adjacent two layers is inequality, wherein, ground floor 13 is polymethyl methacrylate material (Polymethyl Methacrylate, be called for short PMMA, be commonly called as acrylic) and be provided with some micro-structurals 11 (as prismatic mirror), described micro-structural 11 sizes, shape is identical and be evenly distributed.The described second layer 12 is polystyrene material (polystyrene is called for short PS).And described the 3rd layer 14 also be polymethyl methacrylate material (PMMA, acrylic), the 4th layer 15 is polystyrene material (PS), layer 5 16 is polymethyl methacrylate material (PMMA, an acrylic), thus, form the five-layer structure that PMMA (acrylic) and PS material alternate intervals are provided with, these five layers of materials are by the one extrusion modling, and because the refractive index difference of unlike material, make each refraction angle

The layer 5 16 that light from bottom to top passes diffuser plate 20 is worn the path of penetrating and has been elongated, compared to prior art during to ground floor 13, the structure of 5 layers of unlike material of diffuser plate 20 described in the utility model, improved the diffusivity of light, simultaneously, because the setting of micro-structural, make that the spotlight effect of diffuser plate 20 is outstanding, improve the transmitance of light, and need not in diffuser plate 20, to add diffusion particle (as fluorescence blast additive), reduced the manufacturing cost of diffuser plate 20.

Described light source 40 will produce light and finally make liquid crystal panel shinny after its energising for being arranged at the fluorescent tube of described LGP 10 belows.Described module backlight 100 can be divided into the side light-source type or directly descend two kinds of light-source types according to the difference that fluorescent tube is provided with the position.

In another embodiment, described diffuser plate 20 ' can also be made of three-decker, please join shown in Figure 3ly, and this diffuser plate 20 ' comprises ground floor 17 ', the second layer 18 ' and the 3rd layer 19 '.Described ground floor 17 ' is polymethyl methacrylate material (PMMA, i.e. an acrylic), and its thickness H1 is between 0.01 millimeter to 1 millimeter, and this ground floor 17 ' is provided with micro-structural 11, and this micro-structural is some sizes, shape is identical and equally distributed prismatic mirror; The described second layer 18 ' is polystyrene material (polystyrene is called for short PS), and its thickness is H2; Described the 3rd layer 19 ' is polymethyl methacrylate material (PMMA, i.e. acrylic), and its thickness H3 equals H1, promptly also between 0.01 millimeter to 1 millimeter.Described three layer 17 ', 18 ', 19 ' is structure as a whole, and it is by the one extrusion molding, because the refractive index difference of unlike material, the refraction angle when causing light to pass this described three-layer-material is closed and is

Wherein, the ratio H1 of described ground floor thickness H1 and second layer thickness H2: H2 (comprises 0.01 and 1) between 0.01 to 1, and same, the ratio H3 of threeply degree H3 and second layer thickness H2: H2 (comprises 0.01 and 1) between 0.01 to 1.

The employed PMMA material of diffuser plate in each embodiment described in the utility model (being acrylic) not only is confined to the acrylic material, the copolymer of also replaceable one-tenth acrylic.

Module backlight 100 described in the utility model is by being arranged to diffuser plate 20,20 ' sandwich construction (at least 3 layers) of one extrusion molding, and the material of adjacent two layers is inequality, make the propagation path of light in diffuser plate 20,20 ' be elongated, improved light through diffuser plate 20, diffusivity 20 ' time, avoided in diffuser plate 20,20 ', adding diffusion particle (being fluorescence blast additive), greatly reduced diffuser plate 20,20 ' manufacturing cost.

Although be the example purpose, preferred implementation of the present utility model is disclosed, but those of ordinary skill in the art will recognize that under situation about not breaking away from by the disclosed scope and spirit of the present utility model of appending claims, various improvement, increase and replacement are possible.

Claims

1. diffuser plate, it is characterized in that: this diffuser plate comprises ground floor, the second layer and the 3rd layer, described ground floor, the second layer and the 3rd layer of setting of fitting each other, and the material difference of adjacent two layers, these three layers form integrative-structure through the one extrusion molding, the material of described ground floor is polymethyl methacrylate or its copolymer, and the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.

2. diffuser plate as claimed in claim 1 is characterized in that: described ground floor is provided with the micro-structural that some sizes, shape are all identical and be evenly distributed.

3. diffuser plate as claimed in claim 2, it is characterized in that: described diffuser plate further comprises the 4th layer and layer 5 with described three layers of one extrusion molding, the 4th layer material is a polystyrene, and the material of layer 5 is polymethyl methacrylate or its copolymer.

4. diffuser plate as claimed in claim 1 is characterized in that: the ratio of the thickness of described ground floor and the thickness of the second layer is between 0.01 to 1, and the ratio of described threeply degree and second layer thickness is between 0.01 to 1.

5. diffuser plate as claimed in claim 4 is characterized in that: the thickness of ground floor equates with the 3rd layer thickness.

6. module backlight, comprise a diffuser plate and light source, it is characterized in that: described diffuser plate comprises ground floor, the second layer and the 3rd layer, described ground floor, the second layer and the 3rd layer of setting of fitting each other, and the material difference of adjacent two layers, these three layers form integrative-structure through the one extrusion molding, and the material of described ground floor is polymethyl methacrylate or its copolymer, the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.

7. module backlight as claimed in claim 6 is characterized in that: described light source is positioned at a side of the described second layer.

8. module backlight as claimed in claim 7 is characterized in that: described ground floor, the 3rd layer are equipped with smooth inner surface and outer surface.