CN2708342Y - Base material structure capable of avoiding warp - Google Patents
Base material structure capable of avoiding warp Download PDFInfo
- Publication number
- CN2708342Y CN2708342Y CN 200420059384 CN200420059384U CN2708342Y CN 2708342 Y CN2708342 Y CN 2708342Y CN 200420059384 CN200420059384 CN 200420059384 CN 200420059384 U CN200420059384 U CN 200420059384U CN 2708342 Y CN2708342 Y CN 2708342Y
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- Prior art keywords
- protective seam
- substrate body
- matrix structure
- warpage
- described matrix
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Abstract
The utility model relates to an optical element, which is a base material structure capable of avoiding warp, mainly containing a base material body of which the surface is provided with a protecting layer. The base material body is made of a cyclic olefins polymer (COP) or a cyclic olefins copolymet (COC) with low water absorption, and the protecting layer is made of a polymethyl methacrylate (PMMA) or a polycarbonate (PC) with high hardness.
Description
Technical field
The utility model is relevant with optical element, particularly about a kind of matrix structure of avoiding warpage.
Background technology
General optics sheet material be mostly with polymethylmethacrylate (Polymethylmethacrylate, PMM) or polycarbonate (POlycarbonate, PC) made.These two kinds of materials all have higher water absorptivity (water absorption).The water absorptivity of PMMA is tested with testing standard ASTM D570, is 0.3%, and the water absorptivity of PC, identical testing standard is 0.2%.
Fig. 3 to Fig. 5 shows a kind of module backlight 50 commonly used, has a framework 52 and is equiped with a plural tubes 54 and a diffuser plate 56 on it.This diffuser plate 56 has one first side 561, and it is the side in the face of these fluorescent tubes 54, and one second side 562, and it is the opposition side of this first side 561.In Fig. 3, the moisture that on behalf of this diffuser plate 56, we absorbed with point.See also shown in Figure 4ly, when these lamp tube startings, this first side 561 causes wherein contained moisture to be evaporated because of being subjected to the direct irradiation of these fluorescent tubes 54.At this moment, this diffuser plate 56 is can be less than the water cut near the part of second side 562 near the water cut of the part of first side 561.In other words, this diffuser plate 56 near the part of first side 561 material behavior with near the part of second side 562 material behavior become different.Add this first side 561 because of being subjected to the direct irradiation of these fluorescent tubes 54, its surface temperature can be greater than second side 562, and the deflection that causes this first side 561 and second side 562 to be produced is also inequality, and makes this diffuser plate 56 produce warpages, as shown in Figure 5.
The inventor had before once proposed a patent, wherein disclose at a PMMA sheet material or the both sides of a PC sheet material respectively are provided with one by cyclic olefin polymer (Cyclic Olefins Polymer, COP) or cycloolefin co-polymer (Cyclic Olefins Copolymer, COC) formed separation layer.By the low water absorbable of this two separation layer to avoid the aforesaid problem that causes bow warping.But because COP or the hardness of COC lower (greatly about HB between the H), and grease resistance more not, therefore, when this sheet material such as need are exposed to the external world, corrode by scratch or by grease easily.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of matrix structure of avoiding warpage, and it can avoid this base material to be subjected to Temperature Influence and to produce warpage.
Another purpose of the present utility model is to provide a kind of matrix structure of avoiding warpage, and its top layer is difficult for corroding by scratch or by grease.
For reaching aforesaid goal of the invention; the matrix structure of avoiding warpage provided by the utility model; include a substrate body; have one first side and one second side; and on this first side and second side, a protective seam is set respectively; wherein this substrate body is made with cyclic olefin polymer (Cyclic OlefinsPolymer), and this two protective seam is made with the hardness material high than this substrate body.
Description of drawings
Fig. 1 is the cut-open view for the preferred embodiment of one of the utility model;
Fig. 2 is the cut-open view for preferred embodiment of the present utility model, and display base plate is applied to the diffuser plate of module backlight;
Fig. 3 is the diffuser plate of this down straight aphototropism mode set and the synoptic diagram of fluorescent tube, shows moisture contained in the diffuser plate and does not light fluorescent tube;
Fig. 4 is the synoptic diagram of continuity Fig. 3, shows that lamp tube starting causes part water evaporates contained in the diffuser plate, and
Fig. 5 is the synoptic diagram of continuity Fig. 4, shows that the difference of diffuser plate two sides Yin Wendu and water cut are different and produces warpage.
Embodiment
See also shown in Figure 1; a kind of matrix structure 1 of avoiding warpage that the preferred embodiment of one of the utility model is provided; consist predominantly of a substrate body 10; have one first side 12 and one second side 14, and two protective seams 20 are arranged at respectively on first side 12 and second side 14 of this substrate body 10.
This substrate body 10 be with cyclic olefin polymer (Cyclic Olefins Polymer, COP) or with the cycloolefin co-polymer (Cyclic Olefins Copolymer, COC) made.COP or COC are a kind of thermoplastic plastic, possess following properties: advantages such as high transparent, low water absorbable, low-shrinkage, low birefringence, high-fire resistance, dimensional stability, low-k.The water absorptivity of COP and COC is tested with testing standard ASTM D570, is＜0.01%.The low water absorbable of COP and COC can allow the inner contained moisture of this substrate body 10 extremely low, therefore do not have described in the prior art when this base material 1 single face is heated, the phenomenon of generation warpage.
This two protective seam 20 can polymethylmethacrylate (Polymethyl methacrylate, PMMA) or polycarbonate (Polycarbonate, PC) made.The hardness of PMMA is greatly between 2H-3H, and the hardness of PC is greatly between H-2H.The hardness of the two all is higher than COP and COC, and has preferable grease resistance.Cover these substrate body 10 by this two protective seam 20, make outside it can not be exposed to, thereby can produce this substrate body of protection and do not corrode by scratch or by grease.
The method that this two protective seam 20 is arranged at this substrate body 10 has: be total to extrusion method (co-extrusion), rubbing method (coating) and vapour deposition method (evaporation) etc.And rubbing method can be immersion coating (dip coating), and slit is covered with paint, lacquer, colour wash, etc. (slit coating) or rotary coating (spincoating).In addition, vapour deposition method can be the chemical vapor deposition method (chemical vapor deposition, CVD) or physical vapor deposition (physical_vapor deposition, PVD).
Though with formed protective seam 20 its water absorptivitys of PMMA or PC than the height (water absorptivity of PMMA with the made substrate body 10 of COP or COC; test with testing standard ASTM D570; be 0.3%; and the water absorptivity of PC; identical testing standard is 0.2%), but as the proportional control of the thickness of the thickness of this two protective seam 20 and this substrate body 10 below 1/5; this base material also can not produce the phenomenon of warpage under the situation that single face is heated.In the utility model preferred embodiment, the thickness of this substrate body 10 is greater than 0.5mm, and the thickness of each protective seam 20 is greater than 1 μ m; Best, the thickness of this this substrate body 10 is between 1mm-5mm, and the thickness of each protective seam 20 is between 50 μ m-500 μ m.
Fig. 2 shows that base material 1 provided by the utility model is applied to a module 30 backlight.This steamed bun group 30 backlight has a framework 32, is equiped with plural tubes 34 on it and with the made diffuser plate 36 of base material of the present utility model.This diffuser plate 36 have one with cyclic olefin polymer (CyclicOlefms Polymer, COP) made substrate body 38 and two is by polycarbonate (Polycarbonate, PC) made protective seam 40.Because this substrate body 38 has extremely low water absorptivity, makes the water cut of diffuser plate 36 very little, therefore after these fluorescent tubes 34 were lighted, this diffuser plate can not produce warpage because of the evaporation of moisture yet.
The matrix structure of warpage of avoiding provided by the utility model can be applicable to the diffuser plate of down straight aphototropism mode set, light guide plate, windows be protected plate, optical mirror slip, screen or fixed other suitable products of side entrance back module.
Claims (10)
1. the matrix structure that can avoid warpage is characterized in that: include a substrate body, have one first side and one second side; On this first side and second side protective seam is set respectively, wherein this substrate body is made with cyclic olefin polymer (Cyclic Olefins Polymer), and this two protective seam is made with the hardness material high than this substrate body.
2. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein this substrate body be with the cycloolefin co-polymer (Cyclic Olefins Copolymer, COC) made.
3. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein this protective seam be with polymethylmethacrylate (Polymethyl methacrylate, PMMA) made.
4. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein this protective seam be with polycarbonate (Polycarbonate, PC) made.
5. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein this two protective seam method of being arranged at this substrate body can be common extrusion method (co-extrusion), rubbing method (coating) or vapour deposition method (cvaporation).
6. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein the thickness of this protective seam is greater than 1 μ m.
7. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein the thickness of this substrate body is greater than 0.5mm, and the thickness of this protective seam is greater than 1 μ m.
8. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein the thickness of this substrate body is between 1mm-5mm, and the thickness of this protective seam is between 50 μ m to 500 μ m.
9. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein the thickness ratio of the thickness of this substrate body and this protective seam is below 1/5.
10. according to the described matrix structure of avoiding warpage of claim 1, it is characterized in that: wherein the hardness of this protective seam is more than 1H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059384 CN2708342Y (en) | 2004-05-21 | 2004-05-21 | Base material structure capable of avoiding warp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059384 CN2708342Y (en) | 2004-05-21 | 2004-05-21 | Base material structure capable of avoiding warp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2708342Y true CN2708342Y (en) | 2005-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420059384 Expired - Fee Related CN2708342Y (en) | 2004-05-21 | 2004-05-21 | Base material structure capable of avoiding warp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2708342Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319020B (en) * | 2007-04-27 | 2012-12-12 | 富士胶片株式会社 | Cyclic olefin polymer, optical material, polarizing plate and liquid crystal display |
| CN103791307A (en) * | 2012-10-26 | 2014-05-14 | 奇菱光电股份有限公司 | Display device and backlight module thereof |
| CN105467484A (en) * | 2015-12-11 | 2016-04-06 | 无锡联创薄板有限公司 | A PS optical diffuser |
-
2004
- 2004-05-21 CN CN 200420059384 patent/CN2708342Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319020B (en) * | 2007-04-27 | 2012-12-12 | 富士胶片株式会社 | Cyclic olefin polymer, optical material, polarizing plate and liquid crystal display |
| CN103791307A (en) * | 2012-10-26 | 2014-05-14 | 奇菱光电股份有限公司 | Display device and backlight module thereof |
| CN105467484A (en) * | 2015-12-11 | 2016-04-06 | 无锡联创薄板有限公司 | A PS optical diffuser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |