CN1648736A - Straight downward type back light module anti-ultraviolet liquid spreading plate and its producing method - Google Patents
Straight downward type back light module anti-ultraviolet liquid spreading plate and its producing method Download PDFInfo
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- CN1648736A CN1648736A CN 200410039317 CN200410039317A CN1648736A CN 1648736 A CN1648736 A CN 1648736A CN 200410039317 CN200410039317 CN 200410039317 CN 200410039317 A CN200410039317 A CN 200410039317A CN 1648736 A CN1648736 A CN 1648736A
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- uvioresistant
- mode set
- diffusing sheet
- light diffusion
- down straight
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Abstract
The present invention is run-down type back light module uvioresistant light spreading plate and its production process, and aims at providing one yellowing and cracking resistant display part with high size stability, long service life and high performance. The run-down type back light module uvioresistant light spreading plate includes at least one UV absorbing layer set onto the surface of light spreading layer. The production process of the run-down type back light module uvioresistant light spreading plate includes the following steps: extruding base material with light spreading particles in the first extruder to form the light spreading layer, extruding resin with added UV absorbent in the second extruder to form the UV absorbing layer, setting UV absorbing layer with multilayer T-mold to make it contact with at least one surface of the light spreading layer, and extruding the light spreading layer and the UV absorbing layer to form plate structure.
Description
Technical field
The invention belongs to display components and manufacture method thereof, particularly a kind of down straight aphototropism mode set uvioresistant light diffusing sheet and manufacture method thereof.
Background technology
Since the TFT-LCD invention, various colour liquid crystal display devices just significantly are applied in the daily life list, as products such as notebook computer, PC liquid crystal screen, colored mobile phone, PDA, LCD TV, all progressively replace displays such as traditional CRT, TN, STN.With the LCD TV is example, and LCD TV can be liked by the consumer gradually, and except the liquid crystal response time shortens, resolution improves, and outside panel technology such as large size panel yield raising promoted, it also was one of the main reasons that the brightness of module backlight improves.
Along with the demand of large-sized LCD TV, the brightness demand of LCD TV is also along with increase, and general LCD TV brightness demand is 800～1000Cd/m
2Therefore, traditional back light model setting technology that is evenly distributed via light guide plate by the sidelight source can't satisfy the demand on LCD TV.Therefore, high brightness direct-type backlight source technology also produces thereupon.
In order to improve the brightness of LCD TV, must increase the cold cathode fluorescent lamp number, and make directly-down light source into by side light source originally.
As shown in Figure 1, down straight aphototropism mode set 1 ' be comprise reflecting piece 10 ', several light sources 20 ' and diffuser plate 30 '.And for fear of directly seeing the fluorescent tube vestige, must make light guide plate into diffuser plate, with the brightness of even distribution light source.At present main diffuser plate thickness is to be controlled at 2～3mm, the thickness 3mm～12mm of the light guide plate space of material cost that has substantial degradation relatively, and reach light-weighted purpose.
Existing diffuser plate mainly is made up of by base material acryl (PMMA), polymethylmethacrylate and polystyrene copolymer (MS) and polycarbonate (PC), and in transparent base material, add light diffusion particulate, to reach the purpose that diffusion light presents homogenising.
With acryl (PMMA) is that the main advantage of light diffusing sheet of material is to have good optical transmitance and yellowing resistance, but the basic water-intake rate of acryl (PMMA) material is 0.3～0.4%, but has the not good shortcoming of warpage, dimensional stability on the large scale TV.
With MS and PC is the diffuser plate of material, lower slightly approximately 2～3% on light penetration, but PC has splendid performance on temperature tolerance and dimensional stability.Its main shortcoming be MS and PC under the rayed under the ultraviolet wavelength scope, have the problem of yellow.If with PC be diffuser plate under the long-time irradiation of CCFL, can produce yellow gradually and cause the colour temperature of panel and the problem of aberration.This problem will become the diffuser plate of PC material, the main cause that can't be used widely.
Summary of the invention
The down straight aphototropism mode set uvioresistant light diffusing sheet and the manufacture method thereof that the purpose of this invention is to provide a kind of anti-yellow, anti-cracking, high dimensional stability, raising serviceable life and performance.
Down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention comprises that light diffusion layer is arranged at least one UV-absorbing layer at least one surface of light diffusion layer; Down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method comprises that using first extruder that the base material that adds several light diffusion particulates is extruded forms the light diffusion layer step; Use second extruder that the resin that adds ultraviolet light absorber is extruded and form the UV-absorbing layer step; Put UV-absorbing layer by multilayer T pattern head, so that be contacted with at least one surperficial step of light diffusion layer and light diffusion layer and the UV-absorbing layer that is in contact with it are coextruded them into the platy structure step.
Wherein:
UV-absorbing layer comprises resin and ultraviolet light absorber.
The resin that resin one of is selected from transparent acrylic, polymethylmethacrylate, polystyrene copolymer, polycarbonate or the cycloolefin co-polymer.
The thickness of UV-absorbing layer is 1～200 μ m.
Light diffusion layer comprises several light diffusion particulate and base materials.
Light diffusion particulate one of is selected from organic substance and the dead matter.
Light diffusion particulate one of is selected from acryl, titania or the silicon.
Base material one of is selected from acryl, polymethylmethacrylate, polystyrene copolymer or the polycarbonate.
The content that forms light diffusion particulate in the light diffusion layer step is 10% of base material.
The addition that forms UV-absorbing layer step middle-ultraviolet lamp absorbing agent is 1% of a resin.
Because down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention comprises that light diffusion layer is arranged at least one UV-absorbing layer at least one surface of light diffusion layer; Down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method comprises that using first extruder that the base material that adds several light diffusion particulates is extruded forms the light diffusion layer step; Use second extruder that the resin that adds ultraviolet light absorber is extruded and form the UV-absorbing layer step; Put UV-absorbing layer by multilayer T pattern head, so that be contacted with at least one surperficial step of light diffusion layer and light diffusion layer and the UV-absorbing layer that is in contact with it are coextruded them into the platy structure step.Down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention is used for the module backlight of LCD TV, be to utilize multi-layer, co-extruded plastic rubber shaping technology to produce the plate body that constitutes several layers of structure during manufacturing, and on the plate body surface UV-absorbing layer is set simultaneously, to constitute down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention; During use, reach the phenomenon that blocks ultraviolet direct irradiation and avoid its generation yellow, cracking by UV-absorbing layer, and then avoid causing the colour temperature of LCD TV and color coordinate to produce deviation because of the diffuser plate yellow, to promote purposes such as product quality and increase material lifetime.Not only anti-yellow, anti-cracking, high dimensional stability, and improve serviceable life and performance, thus reach purpose of the present invention.
Description of drawings
Fig. 1, be known down straight aphototropism mode set structural representation front elevation.
Fig. 2, for down straight aphototropism mode set uvioresistant light diffusing sheet structural representation cut-open view of the present invention.
Fig. 3, for down straight aphototropism mode set uvioresistant light diffusing sheet structural representation cut-open view of the present invention (the upper and lower surface of light diffusion layer is provided with UV-absorbing layer).
Fig. 4, for down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method process flow diagram of the present invention.
Fig. 5, for down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method calcspar of the present invention.
Embodiment
As shown in Figure 2, down straight aphototropism mode set uvioresistant light diffusing sheet 10 of the present invention comprises light diffusion layer 110 and is arranged at least one UV-absorbing layer 100 on light diffusion layer 110 at least one surfaces.
Also can be as shown in Figure 3, down straight aphototropism mode set uvioresistant light diffusing sheet 10 of the present invention comprises light diffusion layer 110 and is arranged at the two-layer UV-absorbing layer 100 on light diffusion layer 110 upper and lower surfaces.
UV-absorbing layer 100 comprises resin 102 and ultraviolet light absorber 104.The resin that resin 102 one of is selected from transparent acrylic, polymethylmethacrylate, polystyrene copolymer (MS), polycarbonate (PC) or the cycloolefin co-polymer (COC).The thickness of UV-absorbing layer 100 is 1～200 μ m.
Down straight aphototropism mode set uvioresistant light diffusing sheet 10 of the present invention absorbs ultraviolet light 200 by UV-absorbing layer 100, avoids causing down straight aphototropism mode set uvioresistant light diffusing sheet 10 of the present invention to produce phenomenons such as yellow, cracking to block ultraviolet direct irradiation.
As shown in Figure 3, down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method of the present invention comprises the steps:
Step 1 S110
Form light diffusion layer 110
Use first extruder that the base material 114 that adds several light diffusion particulates 112 is extruded and form light diffusion layer 110; The content of light diffusion particulate 112 is 10% of base material 114.
Step 2 S120
Form UV-absorbing layer 100
Use second extruder that the resin 102 that adds ultraviolet light absorber 104 is extruded and form UV-absorbing layer 100; The addition of ultraviolet light absorber is 1% of a resin.
Step 3 S130
Put UV-absorbing layer 100
Put UV-absorbing layer 100 by multilayer T pattern head (T-die), so that be contacted with at least one surface of light diffusion layer 110;
Step 4 S140
Extrusion modling
As shown in Figure 5, when down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention is made, mainly use first extruder 40 that the PC resin 30 that adds 10%PMMA light diffusion particulate 20 is extruded and form light diffusion layer 50; Use second extruder 80 that the transparent acrylic layer 70 that adds 1% ultraviolet light absorber 60 is extruded and form UV-absorbing layer 90; Put UV-absorbing layer 90 by multilayer T pattern head (T-die) 95, so that it is contacted with the upper and lower surface of diffusion layer 50; PC light diffusion layer 50 and at least one UV-absorbing layer 90 are coextruded them into the anti-yellow of platy structure and the down straight aphototropism mode set uvioresistant light diffusing sheet 98 of the present invention of high dimensional stability light.
Down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention is used for the module backlight of LCD TV, be to utilize multi-layer, co-extruded plastic rubber shaping technology to produce the plate body that constitutes several layers of structure during manufacturing, and on the plate body surface UV-absorbing layer is set simultaneously, and reach block ultraviolet direct irradiation on the plate body surface to constitute down straight aphototropism mode set uvioresistant light diffusing sheet of the present invention, and avoid it to produce yellow, the phenomenon of cracking, and then avoid causing the colour temperature of LCD TV and color coordinate to produce deviation because of the diffuser plate yellow, to promote purposes such as product quality and increase material lifetime.
Claims (11)
1, a kind of down straight aphototropism mode set uvioresistant light diffusing sheet, it comprises light diffusion layer; It is characterized in that at least one surface of described light diffusion layer is provided with at least one UV-absorbing layer.
2, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 1 is characterized in that described UV-absorbing layer comprises resin and ultraviolet light absorber.
3, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 2 is characterized in that the resin that described resin one of is selected from transparent acrylic, polymethylmethacrylate, polystyrene copolymer, polycarbonate or the cycloolefin co-polymer.
4, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 1, the thickness that it is characterized in that described UV-absorbing layer is 1-200 μ m.
5, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 1 is characterized in that described light diffusion layer comprises several light diffusion particulate and base materials.
6, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 5 is characterized in that described light diffusion particulate is selected from organic substance and the dead matter.
7, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 6 is characterized in that described light diffusion particulate is selected from acryl, titania or the silicon.
8, down straight aphototropism mode set uvioresistant light diffusing sheet according to claim 5 is characterized in that described base material is selected from acryl, polymethylmethacrylate, polystyrene copolymer or the polycarbonate.
9, a kind of down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method is characterized in that it comprises that using first extruder that the base material that adds several light diffusion particulates is extruded forms the light diffusion layer step; Use second extruder that the resin that adds ultraviolet light absorber is extruded and form the UV-absorbing layer step; Put UV-absorbing layer by multilayer T pattern head, so that be contacted with at least one surperficial step of light diffusion layer and light diffusion layer and the UV-absorbing layer that is in contact with it are coextruded them into the platy structure step.
10, down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method according to claim 9 is characterized in that the content of light diffusion particulate in the described formation light diffusion layer step is 10% of base material.
11, down straight aphototropism mode set uvioresistant light diffusing sheet manufacture method according to claim 9 is characterized in that the addition of described formation UV-absorbing layer step middle-ultraviolet lamp absorbing agent is 1% of a resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410039317 CN1648736A (en) | 2004-01-19 | 2004-01-19 | Straight downward type back light module anti-ultraviolet liquid spreading plate and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410039317 CN1648736A (en) | 2004-01-19 | 2004-01-19 | Straight downward type back light module anti-ultraviolet liquid spreading plate and its producing method |
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| CN1648736A true CN1648736A (en) | 2005-08-03 |
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| CN 200410039317 Pending CN1648736A (en) | 2004-01-19 | 2004-01-19 | Straight downward type back light module anti-ultraviolet liquid spreading plate and its producing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285902B (en) * | 2007-04-11 | 2010-05-26 | 颖台科技股份有限公司 | Diffusing plate group |
| CN101153700B (en) * | 2006-09-28 | 2010-09-15 | 颖台科技股份有限公司 | Directly-down backlight module structure |
| CN105974512A (en) * | 2016-06-06 | 2016-09-28 | 广州创维平面显示科技有限公司 | Light guide plate, backlight module, display device and manufacture method for light guide plate |
| CN107674229A (en) * | 2017-10-17 | 2018-02-09 | 贵州眯果创意科技有限公司 | A kind of energy-saving LED lamp lampshade material and preparation method thereof |
| WO2021120308A1 (en) * | 2019-12-17 | 2021-06-24 | Tcl华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
-
2004
- 2004-01-19 CN CN 200410039317 patent/CN1648736A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153700B (en) * | 2006-09-28 | 2010-09-15 | 颖台科技股份有限公司 | Directly-down backlight module structure |
| CN101285902B (en) * | 2007-04-11 | 2010-05-26 | 颖台科技股份有限公司 | Diffusing plate group |
| CN105974512A (en) * | 2016-06-06 | 2016-09-28 | 广州创维平面显示科技有限公司 | Light guide plate, backlight module, display device and manufacture method for light guide plate |
| CN107674229A (en) * | 2017-10-17 | 2018-02-09 | 贵州眯果创意科技有限公司 | A kind of energy-saving LED lamp lampshade material and preparation method thereof |
| WO2021120308A1 (en) * | 2019-12-17 | 2021-06-24 | Tcl华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
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Open date: 20050803 |