CN1260583C - Back light module, light conducting plate and manufacturing method thereof - Google Patents
Back light module, light conducting plate and manufacturing method thereof Download PDFInfo
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- CN1260583C CN1260583C CN 03102570 CN03102570A CN1260583C CN 1260583 C CN1260583 C CN 1260583C CN 03102570 CN03102570 CN 03102570 CN 03102570 A CN03102570 A CN 03102570A CN 1260583 C CN1260583 C CN 1260583C
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- light guide
- guide plate
- base material
- diffusion
- backlight module
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Abstract
The present invention relates to a back light module which comprises a diffusion film, a prism film and a light guide plate, wherein the light guide plate is provided with a first surface and a second surface which is opposite to the first surface, and a plurality of diffusion particles are distributed in the light guide plate; the prism film is arranged on the first surface of the light guide plate; the diffusion film is arranged on the prism film. In addition, the present invention also provides a light guide plate and a manufacture method thereof.
Description
Technical field
The present invention relates to a kind of backlight module, light guide plate and manufacture method thereof.Be particularly related to a kind of tool high brightness, backlight module, light guide plate and manufacture method thereof cheaply.
Background technology
Along with the arriving of digital Age, the television image quality more and more is subjected to the attention in market, and whole display development trend is all towards large scale, high resolving power and slimming.Because above trend is determined, make TFT-LCD and PDP more and more be subjected to consumer green grass or young crops and pay attention to, but PDP is made TFT-LCD computer screen and TV little by little replace traditional CRT screen and TV because of price still is higher than the acceptable scope in market.
TFT-LCD is a kind of non-self-luminosity display, therefore need provide its required light source by the external world.The TFT-LCD display of all tool autoluminescence characteristics all is to provide display needed light source with backlight module at present.The framework of traditional backlight module as shown in Figure 1.The large-sized monitor that Fig. 1 shows is made up of reflectance coating 16, cold cathode fluorescent lamp 15, light guide plate 14, first diffusion barrier 11, second diffusion barrier 13, prism film 12 module frames 17 with backlight module 1.Wherein first diffusion barrier 11 places before the prism film 12, and prism film 12 places before second diffusion barrier 13, and second diffusion barrier 13 places before the light guide plate 14.At present backlight module 1 can be divided into two kinds of straight-down negative and side-light types according to the light source presentation mode.Straight-down negative is directly cold cathode fluorescent lamp 15 to be placed light guide plate 14 belows, mainly is to provide backlight module 1 required light source in the mode of penetrating.Side-light type is the side that cold cathode fluorescent lamp 15 is placed wedge type light guide plate 14, mainly is to provide required light source in the reflection mode.More than two kinds of backlight modules 1 need light guide plate 14 make distribution of light even mostly.Generally speaking, light guide plate 14 can be divided into printing-type and non-printing-type according to processing mode.Printing-type mainly is with the light guide plate 14 of ejaculation or extrusion process institute output, will reflect the site via stencil printing again and be printed on the light guide plate 14.Non-printing light guide plate 14 generally is with shoot mode, make wedge type light guide plate 14 or with the microstructure direct injection on light guide plate 14 surfaces.
Along with the evolution of trend, large-sized desktop display and domestic TV replace small-size product gradually, are example with the computer screen, traditional 15 ", 17 ", and the CRT screen slowly disappears from the market, ", 17 " the above lcd screen of the substitute is 15.On the other hand, " above lcd screen will be very fast becomes the market mainstream along with popularizing of the 5th generation TFT-LCD technology, 17.In this case, large-sized light guide plate also must increase along with the increase of LCD screen size.But with present emission technology, be confined to the pressurize tonnage of mould, " penetrating light guide plate has been the production limit to seem 15.Hence one can see that, for larger sized light guide plate certainly will can only adopt extrusion molding production.Wherein in the characteristic about backlight module, brightness of backlight module is an important characteristic, and in addition as how cheaper mode is made identical or more high-quality backlight module and how to improve it that to make qualification rate all be the technical emphasis of present volume production.
Summary of the invention
For overcoming weak point of the prior art, light guide plate and the manufacture method thereof of purpose of the present invention for a kind of tool light diffusion function is provided.
The backlight module of another object of the present invention for providing a kind of to use one deck diffusion barrier.
The invention is characterized in the diffusion particle that is distributed with a plurality of high concentrations in the light guide plate.
And another feature of the present invention is that backlight module only uses one deck diffusion barrier, and is distributed with the diffusion particle of a plurality of high concentrations in its light guide plate.
Therefore, for reaching above-mentioned purpose, the invention provides a kind of light guide plate, it comprises a light guide base material, reaches a plurality of diffusion particles, and these diffusion particles are distributed in this light guide plate inside.
Again, the present invention also provides a kind of method for manufacturing light guide plate, and its step comprises: a light guide base material is mixed with a plurality of diffusion particles; Melt this light guide base material and these diffusion particles and become a molten shape thing; And should melt the moulding of shape thing.
In addition, the present invention also provides a kind of backlight module, it is characterized in that: comprising: a light guide plate, and it has a first surface and a second surface relative with this first surface, is distributed with a plurality of diffusion particles in this light guide plate; One prism film, it is arranged on the first surface of this light guide plate; And a diffusion barrier, it is arranged on this prism film.
In other words, backlight module provided by the invention, its structure comprises a diffusion barrier, a prism film, a light guide plate, a cold cathode fluorescent lamp, a reflectance coating and a module frame in regular turn, and wherein this diffusion barrier places before this prism film, and this prism film places before this light guide plate.In the kenel of straight-down negative, this light guide plate places before this cold-cathode lamp, and this cold-cathode lamp places before this reflectance coating; In the kenel of side-light type, this light guide plate places before the reflectance coating, and this cold-cathode lamp places a side of this light guide plate.It is direction assembling, fixing whole backlight module that this module frame faces its opening surface with reflectance coating.
As mentioned above, because of including the high concentration diffusion particle, therefore can reach the effect of blast according to light guide plate of the present invention.Use plate for high luminance light guide according to backlight module of the present invention again with diffusion effect, therefore only need to use one deck diffusion barrier can reach required diffusion effect, and because of only using one deck diffusion barrier to make the amount of penetrating of light increase, and the assembling complexity of reduction backlight module, therefore can reach the effect that increases brightness, reduces cost and improve the assembling yield.
Description of drawings
Fig. 1 is the exploded view of the backlight module of a prior art.
Fig. 2 is the side view according to the light guide plate of preferred embodiment of the present invention.
Fig. 3 is the process flow diagram according to the method for manufacturing light guide plate of preferred embodiment of the present invention.
Fig. 4 is the exploded view according to the backlight module of preferred embodiment of the present invention.
The element numbers explanation:
1: the traditional backlight module
11: the first diffusion barriers
12: prism film
13: the second diffusion barriers
14: light guide plate
15: cold cathode fluorescent lamp
16: reflectance coating
17: module frame
2: backlight module
21: diffusion barrier
22: prism film
24: light guide plate
241: light guide base material
242: diffusion particle
25: cold cathode fluorescent lamp
26: reflectance coating
27: module frame
301～303: the flow process of backlight module manufacture method
Embodiment
Hereinafter with reference to relevant drawings, light guide plate, backlight module and manufacture method thereof according to preferred embodiment of the present invention are described.
As shown in Figure 2, the light guide plate 24 of preferred embodiment of the present invention is made up of a light guide base material 241 and a plurality of diffusion particle 242.In present embodiment, this light guide base material 241 can be made of optics acryl resin or polycarbonate base material.This diffusion particle 242 can by various organic and inorganic material such as silicon dioxide, titania, acryl resin, polystyrene, silica gel, epoxy resin or polycarbamate or wherein two or more material granules be constituted, its grain size is between 5 μ m to 15 μ m, its ratio system in light guide plate 24 is between 0.5%～5%, refractive index that its ratio and diffusion particle 242 and light guide base material are 241 and the shape of diffusion particle 242, big or small relevant.
Again, the light guide plate 24 of preferred embodiment of the present invention is made flow process shown in Fig. 3 step 301～303.In present embodiment, light guide base material 241 adopts the optics acryl resin.The method for making of this light guide plate is as follows:
Carry out the quantitative mixing of material in the step 301, it is to provide earlier and mix diffusion particle 242 and light guide base material 241.Wherein the concentration of diffusion particle 242 account for total mixture ratio 0.1%～20%.The refractive index that the ratio of diffusion particle 242 and light guide base material 241 and diffusion particle 242 and light guide base material are 241 and the shape of diffusion particle 242, size are relevant.Wherein diffusion particle 242 can by various organic and inorganic material such as silicon dioxide, titania, acryl resin, polystyrene, silica gel, epoxy resin or polycarbamate or wherein two or more material granules be constituted, its size is between 5 μ m to 15 μ m, and presents sphere, hollow sphere, irregular shape, strip, triangle cone, cube or dish.Light guide base material 241 can be acrylic resin particle or the polycarbonate base material constitutes.
It in the step 302 program of carrying out fusion, its be with the diffusion particle 242 and the potpourri of light guide base material 241 send in the dry bucket with 80～130 ℃ of dryings it, in 2～6 hours after,, and send in the material pipe of extruder its derivation, afterwards, with the screw rod of 240～300 ℃ of temperature with its melting mixing.
It in the step 303 program of carrying out moulding, it is through the quantitative voltage stabilizing of gear-type pump with the molten shape thing after the fusion, be extruded into flat board with T pattern head again, afterwards, via 60～120 ℃ of cooling rollers it is flattened into continuous flat board, pass through visual testing, pad pasting program again, and it is cut into 1380mm * 1100mm size.Cut into 17 on demand afterwards " or the size of other demand, and the panel after will cutting is through polishing, printing, ink setting, to form a light guide plate 24.
Below, the backlight module of preferred embodiment of the present invention is described according to Fig. 4.Because employed light guide plate is aforementioned light guide plate in the present embodiment, is not described in detail in this.
As shown in Figure 4, the composition of the backlight module 2 of preferred embodiment of the present invention comprises a light guide plate 24, a reflectance coating 26, a cold cathode fluorescent lamp 25, a prism film 22, a module frame 27 and a diffusion barrier 21.Wherein diffusion barrier 21 places before the prism film 22, and prism film 22 places before the light guide plate 24.
In the kenel of straight-down negative, light guide plate 24 places before the cold cathode fluorescent lamp 25, and cold cathode fluorescent lamp 25 places before this reflectance coating 26, and it is direction assembling that module frame 27 faces opening surface with reflectance coating 26, and fixing whole backlight module 2.Light guide plate 24 has a first surface 243 and a second surface 244 relative with this first surface.
In the kenel of side-light type, light guide plate 24 places before the reflectance coating 26, and cold cathode fluorescent lamp 25 places one of light guide plate 24 side, and it is direction assembling that module frame 27 faces opening surface with reflectance coating 26, and fixing whole backlight module 2.
Find that through test back 5 of the backlight module 2 of preferred embodiment of the present invention and 13 uniformity coefficient and are found to make 5 average luminance promote 3～7% because of reducing a slice diffusion barrier 21 all in specification 75% and 85%.
The above only is an illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim its equivalent modifications of carrying out or change.
Claims (17)
1. light guide plate is characterized in that: comprising:
One light guide base material; And
A plurality of diffusion particles, this diffusion particle are distributed in this light guide base material inside.
2. light guide plate as claimed in claim 1 is characterized in that: this light guide base material is selected from one of group that is made of optics acryl resin and polycarbonate base material.
3. light guide plate as claimed in claim 1 is characterized in that: this diffusion particle is selected from one of group that is made of silicon dioxide, titania, acryl resin, polystyrene, silica gel, epoxy resin and polycarbamate.
4. light guide plate as claimed in claim 1 is characterized in that: the grain size of this diffusion particle is between 5 μ m to 15 μ m.
5. light guide plate as claimed in claim 1 is characterized in that: the particle appearance of this diffusion particle is spherical in shape or be irregular shape.
6. light guide plate as claimed in claim 1 is characterized in that: this diffusion particle is 0.5～5% in the shared ratio of this light guide base material.
7. method for manufacturing light guide plate is characterized in that: comprising:
One light guide base material is mixed with a plurality of diffusion particles;
Melt this light guide base material and these diffusion particles and become a molten shape thing; And
Should melt the moulding of shape thing.
8. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: this light guide base material is selected from one of group that is made of optics acryl resin and polycarbonate base material.
9. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: this diffusion particle is selected from one of group that is made of silicon dioxide, titania, acryl resin, polystyrene, silica gel, epoxy resin and carbamate.
10. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: the grain size of this diffusion particle is between 5 μ m to 15 μ m.
11. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: the particle appearance of this diffusion particle is spherical in shape or be irregular shape; This diffusion particle and this light guide base material melt with the screw rod type of heating; And should finalize the design with T pattern head extrusion way by molten shape thing.
12. method for manufacturing light guide plate as claimed in claim 7 is characterized in that: this diffusion particle is 0.5～5% in the shared ratio of this light guide base material.
13. a backlight module is characterized in that: comprising:
One light guide plate, it has a first surface and a second surface relative with this first surface, is distributed with a plurality of diffusion particles in this light guide plate;
One prism film, it is arranged on the first surface of this light guide plate; And
One diffusion barrier, it is arranged on this prism film.
14. backlight module as claimed in claim 13 is characterized in that: also comprise:
One cold cathode fluorescent lamp, it is adjacent on the second surface of this light guide plate; And
One reflectance coating, it is arranged at a side that is parallel to this light guide plate adjacent surface on this cold cathode fluorescent lamp.
15. backlight module as claimed in claim 14 is characterized in that: also comprise:
One module frame, it has a peristome, a bottom and a spatial accommodation relative with this peristome, and this light guide plate, this prism film, this diffusion barrier, this cold cathode fluorescent lamp and this reflectance coating place this spatial accommodation, and this reflectance coating is adjacent to this bottom.
16. backlight module as claimed in claim 13 is characterized in that: also comprise:
One cold cathode fluorescent lamp, it is arranged on this light guide plate the side perpendicular to this first surface; And
One reflectance coating, it is arranged on the second surface of this light guide plate.
17. backlight module as claimed in claim 16 is characterized in that: also comprise:
One module frame, it has a peristome, a bottom and a spatial accommodation relative with this peristome, and this light guide plate, this prism film, this diffusion barrier, this cold cathode fluorescent lamp and this reflectance coating place this spatial accommodation, and this reflectance coating is adjacent to this bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03102570 CN1260583C (en) | 2003-02-12 | 2003-02-12 | Back light module, light conducting plate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03102570 CN1260583C (en) | 2003-02-12 | 2003-02-12 | Back light module, light conducting plate and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1521521A CN1521521A (en) | 2004-08-18 |
| CN1260583C true CN1260583C (en) | 2006-06-21 |
Family
ID=34281775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03102570 Expired - Fee Related CN1260583C (en) | 2003-02-12 | 2003-02-12 | Back light module, light conducting plate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1260583C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060079724A (en) | 2005-01-03 | 2006-07-06 | 삼성전자주식회사 | A backlight assembly removing dark portion and a flat display device provided with the same |
| CN101193141B (en) * | 2006-11-30 | 2011-05-25 | 光宝科技股份有限公司 | Slim light guide structure and electronic device using this structure |
| CN102116959B (en) | 2009-12-31 | 2013-08-14 | 北京京东方光电科技有限公司 | Optical element of liquid crystal display and manufacturing method thereof |
| CN111477117A (en) * | 2019-01-24 | 2020-07-31 | 深圳光峰科技股份有限公司 | L ED display screen and preparation method thereof |
-
2003
- 2003-02-12 CN CN 03102570 patent/CN1260583C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1521521A (en) | 2004-08-18 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 |