CN100462743C - Optical pervasion thin film and LCD device using same - Google Patents
Optical pervasion thin film and LCD device using same Download PDFInfo
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- CN100462743C CN100462743C CNB2007100701961A CN200710070196A CN100462743C CN 100462743 C CN100462743 C CN 100462743C CN B2007100701961 A CNB2007100701961 A CN B2007100701961A CN 200710070196 A CN200710070196 A CN 200710070196A CN 100462743 C CN100462743 C CN 100462743C
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Abstract
The present invention discloses an optical diffusion film and comprises a transparent baseplate made of optics transparent material with the refractive index ranging from 1.4 to 1.75. The upper surface of the transparent baseplate is provided with an upper diffusion coating with the refractive index ranging from 1.4 to 1.7; upper diffusion particles with the refractive index ranging from 1.4 to 1.75 are arranged in the upper diffusion coating. The present invention is characterized in that the upper diffusion particles contact closely to one another and distribute on the upper surface; the maximal geometry size of the upper diffusion particle is from 1 to 100 microns; and the thickness of the upper diffusion coating is 1/8 - 7/8 of the maximal size of the upper diffusion particles. The present invention has the advantages that the optical diffusion film is enabled to provide with higher light gathering via controlling the sizes, shapes and arrangements of the upper diffusion particles in the upper diffusion coating, and via controlling the thickness of the coating layer; moreover, a liquid crystal display device is applied in the optical diffusion film in the present invention. The liquid crystal display device is provided with few quantities of the combination modules, and comparatively high optics uniformity and brightness.
Description
Technical field
The present invention relates to a kind of optical thin film, especially relate to a kind of optical diffusion membrane and use the liquid crystal indicator of this optical diffusion membrane.
Background technology
Existing optical diffusion membrane is widely used in liquid crystal indicator, and advertising lamp box, lighting, mobile communication equipment button etc. need on the device of light source so that even illumination to be provided.Liquid crystal indicator fast-developing and in the widespread use of mobile communication equipment demonstration, laptop computer displays, desktop computer display and large scale liquid crystal TV in recent years, performance requirement to optical diffusion membrane in the display device improves day by day, mainly concentrates on to improve on brightness and the illumination uniformity.
The existing optical diffusion membrane that is applied to liquid crystal indicator mostly is and adopts calendering technology figuratum organic film of producing of single belt and the multilayer film that adopt application pattern to produce, and wherein contains the scattering particle of different size in the overlay of the multilayer film that adopt application pattern to produce.Fig. 1 is the structural representation of the optical diffusion membrane produced of traditional employing application pattern, and this optical diffusion membrane mainly comprises transparency carrier 10, last overlay 20 and go up scattering particle 40 and following overlay 30 reach under scattering particle 50.The optical diffusion membrane that traditional employing application pattern is produced mainly relies on the scattering particle of random scatter in the overlay and different size that the incident ray that enters in the coating is carried out abundant scattering, so that the direction stochastic distribution of emergent ray, thereby, and the flaw of film lower back optical mode set of pieces hidden the inhomogeneous light field homogenising of incident.Simultaneously, because the top of some larger-size particles protrudes in coating surface, formation has the curved surface 21 of certain optically focused effect to light, thereby makes this kind optical diffusion sheet have certain light gathering.Yet in this design, owing to have only the larger-size particle of minority to protrude in coating, so the light gathering of this film is very limited.And the shape of particle, Size Distribution is very wide, though can increase the optics diffusivity of film, the light gathering of having lost film simultaneously makes that directly the brightness of the liquid crystal indicator of this film of use is not high.
Summary of the invention
Technical matters to be solved by this invention provides a kind of liquid crystal indicator that can effectively improve the optical diffusion membrane of optics uniformity coefficient and brightness and use this optical diffusion membrane.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of optical diffusion membrane, comprise that one is the transparency carrier that 1.4～1.75 optically transparent material is made by refractive index, it is 1.4～1.7 last diffusion coating that the upper surface of described transparency carrier is provided with refractive index, describedly go up that to be provided with refractive index in the diffusion coating be 1.4～1.75 last diffusion particle, described upward diffusion particle closely contacts each other and is distributed on the described upper surface, the described diffusion particle of going up is made up of by following percentage by weight the spheroidal particle of following diameter, 5 μ m:1.21%, 7.5 μ m:3.84%, 10 μ m:8.20%, 12.5 μ m:5.77%, 15 μ m:15.92%, 17.5 μ m:7.7%, 20 μ m:19.03%, 22.5 μ m:16.35%, 25 μ m:9.61%, 27.5 μ m:6.83%, 30 μ m:5.54%, the described arrangement mode of going up diffusion particle is a random alignment, the described thickness of going up diffusion coating is last diffusion particle maximum sized 1/2～7/8.
Described baseplate material is a kind of among glass, PET, PC, PMMA and the PS, and the described material of going up diffusion particle is a kind of among silicone resin Tospearl, PS and the PMMA.
1/2 of the maximum gauge that the described upward thickness of diffusion coating is described upward diffusion particle.
Described optical diffusion membrane, it is 1.4～1.7 following diffusion coating that the lower surface that it is characterized in that described transparency carrier is provided with refractive index, be provided with refractive index in the described down diffusion coating and be 1.4～1.75 following diffusion particle, described diffusion particle does not down contact mutually and disperses to be arranged on the described lower surface, the thickness of described down diffusion coating is that described diffusion particle down is maximum sized 1/2～7/8, and the shared area sum of described diffusion particle down is 1/100 with the described ratio of the area of diffusion coating down.
A kind of liquid crystal indicator, comprise that is used for a luminous light source assembly, liquid crystal panel assembly and a slice optical diffusion membrane at least, described optical diffusion membrane comprises that one is the transparency carrier that 1.4～1.75 optically transparent material is made by refractive index, it is 1.4～1.7 last diffusion coating that the upper surface of described transparency carrier is provided with refractive index, describedly go up that to be provided with refractive index in the diffusion coating be 1.4～1.75 last diffusion particle, described upward diffusion particle closely contacts each other and is distributed on the described upper surface, the described diffusion particle of going up is made up of by following percentage by weight the spheroidal particle of following diameter, 5 μ m:1.21%, 7.5 μ m:3.84%, 10 μ m:8.20%, 12.5 μ m:5.77%, 15 μ m:15.92%, 17.5 μ m:7.7%, 20 μ m:19.03%, 22.5 μ m:16.35%, 25 μ m:9.61%, 27.5 μ m:6.83%, 30 μ m:5.54%, the described arrangement mode of going up diffusion particle is a random alignment, and the described thickness of going up diffusion coating is last diffusion particle maximum sized 1/2～7/8.
Described light source assembly comprises light source, light guide plate and reflector plate, and described light source is arranged on the side of described light guide plate, and described light source is at least a in cold-cathode fluorescence lamp, external electrode fluorescent lamp, light emitting diode and the hot-cathode fluorescent lamp.
Described light source assembly comprises light source, diffuser plate and reflector plate, described light source is arranged between described diffuser plate and the described reflector plate, and described light source is at least a in cold-cathode fluorescence lamp, external electrode fluorescent lamp, light emitting diode and the hot-cathode fluorescent lamp.
Compared with prior art, the invention has the advantages that size, shape and the arrangement of going up diffusion particle in the diffusion coating, and make this optical diffusion membrane have higher light gathering by the thickness of control overlay by controlling; The following diffusion coating that is provided with down diffusion particle makes optical diffusion membrane form a thin air layer when specifically being applied in the display device and between other element; Used the liquid crystal indicator of optical diffusion membrane of the present invention, it has less combine component quantity, and has higher optics uniformity coefficient and brightness.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the optical diffusion membrane of prior art;
Fig. 2 is the diagrammatic cross-section of the optical diffusion membrane of the embodiment of the invention one;
Fig. 3 is the embodiment of the invention two cross-sectional view;
Fig. 4 is the data plot of the optical brightness of the display device of the optical diffusion membrane formation of the employing embodiment of the invention two;
Fig. 5 is the diagrammatic cross-section of the embodiment of the invention three;
Fig. 6 is the structural representation of the liquid crystal indicator of the embodiment of the invention four;
Fig. 7 is the structural representation of the liquid crystal indicator of the embodiment of the invention four;
Fig. 8 is the structural representation of the liquid crystal indicator of the embodiment of the invention four.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: as shown in Figure 2, optical diffusion membrane 100 comprises that mainly 110, one of transparency carriers include circular last diffusion coating 120 and following diffusion coating 130 that includes diffusion particle 150 under the circle of going up diffusion particle 140.In this concrete exemplifying embodiment, go up 30 microns of the particle diameters that diffusion particle 140 has high unity in the last diffusion coating 120, and be arranged in together in hexagonal array mode the most closely.The thickness of last diffusion coating 120 be strictly controlled at its inside last diffusion particle particle diameter 1/2, last diffusion particle 140 has half to be buried in the diffusion coating 120, second half exposes on last diffusion coating 120, formation has the lens arrangement of spotlight effect, and the light 160 that transmits from below is collected to the center.Contain following diffusion particle 150 in the following diffusion coating 130 than 8 microns of small particle diameter, the shared area sum of following diffusion particle 150 is 1/100 with the ratio of the area of following diffusion coating 130, and following diffusion particle 150 is formed a thin air layer with other element by in the diffusion coating 130 under sparse being arranged at random when making optical diffusion membrane 100 in specifically being applied to module backlight.
Embodiment two: as shown in Figure 3, the same with embodiment one, optical diffusion membrane 200 comprises that equally 210, one of transparency carriers include circular last diffusion coating 220 and following diffusion coating 230 that includes diffusion particle 250 under the circle of going up diffusion particle 240.Be that with embodiment one difference shown in Figure 2 the thickness of the last diffusion coating 220 of optical diffusion membrane 200 is controlled in 7/8 of diffusion particle 240 particle diameters.By controlling the thickness of diffusion coating 220, make optical diffusion membrane 200 can control the centre visual angle brightness and the angular field of view of output light.
Fig. 4 is the concrete optical brightness performance of the optical diffusion membrane of present embodiment.Thickness by controlling diffusion coating 220 is from 1/2 to 7/8 of last diffusion particle 240 particle diameters, using respectively under 1,2,3 layers of situation that optical diffusion membrane piles up, the center brightness trend that tapers off, and there is maximum brightness 1/2 o'clock of diffusion particle 240 particle diameters on the thickness of last diffusion coating 220 is.Fig. 4 illustrates simultaneously under the situation of using this kind of multilayer optical diffusion membrane, can obtain higher brightness.
Embodiment three: as shown in Figure 5, other structure is identical with embodiment one, optical diffusion membrane 500 comprises that 510, one of transparency carriers include circular last diffusion coating 520 and following diffusion coating 530 that includes diffusion particle 550 under the circle of going up diffusion particle 540.Difference is that the circular diffusion particle 540 of going up has the different grain size of optimizing the grain size combination, and for the concrete application of different types of module backlight, circular diffusion particle 540 has different grain size combinations.Subordinate list 1 has provided under the situation of traditional double fluorescent tube desktop type of display, the optimal combination of diffusion particle 540 particle diameters on the circle.
Table 1
| Scattering particle diameter (micron) | The shared number percent of particle weight (%) |
| 5 | 1.21 |
| 7.5 | 3.84 |
| 10 | 8.20 |
| 12.5 | 5.77 |
| 15 | 15.92 |
| 17.5 | 7.70 |
| 20 | 19.03 |
| 22.5 | 16.35 |
| 25 | 9.61 |
| 27.5 | 6.83 |
| 30 | 5.54 |
Embodiment four: as shown in Figure 6, be applied to the example of laptop computer displays for using two-layer above-mentioned optical diffusion membrane.Wherein, 710 is fluorescent tube, and 720 is the high-level efficiency reflector plate, and 730 is the transparent light guide plate in the laptop computer displays, 740 optical diffusion membranes, and 750 is display panels.
Embodiment five: as shown in Figure 7, be applied to the example of desktop computer display for using two-layer above-mentioned optical diffusion membrane.Wherein, 710 is fluorescent tube, and 720 is the high-level efficiency reflector plate, and 760 is the light guide plate in the desktop computer display, and 740 is optical diffusion membrane, and 750 is display panels.
Embodiment six: as shown in Figure 8, be applied to the example of lcd tv display for using two-layer above-mentioned optical diffusion membrane.Wherein, 710 is fluorescent tube, and 720 is the high-level efficiency reflector plate, and 770 is the diffuser plate in the LCD TV, and 740 is optical diffusion membrane, and 750 is display panels.
It is pointed out that for various different types of display device, can satisfy the different brightness and the demand at visual angle by using individual or many this kind optical diffusion membranes.
In the foregoing description, fluorescent tube 710 can be at least a in cold-cathode fluorescence lamp, external electrode fluorescent lamp, light emitting diode and the hot-cathode fluorescent lamp.
Claims (7)
1. an optical diffusion membrane comprises that one is the transparency carrier that 1.4～1.75 optically transparent material is made by refractive index, it is 1.4～1.7 last diffusion coating that the upper surface of described transparency carrier is provided with refractive index, describedly go up that to be provided with refractive index in the diffusion coating be 1.4～1.75 last diffusion particle, it is characterized in that described go up diffusion particle each other closely contact be distributed on the described upper surface, the described diffusion particle of going up is made up of by following percentage by weight the spheroidal particle of following diameter, 5 μ m:1.21%, 7.5 μ m:3.84%, 10 μ m:8.20%, 12.5 μ m:5.77%, 15 μ m:15.92%, 17.5 μ m:7.7%, 20 μ m:19.03%, 22.5 μ m:16.35%, 25 μ m:9.61%, 27.5 μ m:6.83%, 30 μ m:5.54%, the described arrangement mode of going up diffusion particle is a random alignment, the described thickness of going up diffusion coating is last diffusion particle maximum sized 1/2～7/8.
2. optical diffusion membrane as claimed in claim 1 is characterized in that described baseplate material is a kind of among glass, PET, PC, PMMA and the PS, and the described material of going up diffusion particle is a kind of among silicone resin Tospearl, PS and the PMMA.
3. optical diffusion membrane as claimed in claim 1 is characterized in that the described thickness of going up diffusion coating is 1/2 of the described maximum gauge of going up diffusion particle.
4. as the described optical diffusion membrane of claim 1 ~ 3, it is 1.4～1.7 following diffusion coating that the lower surface that it is characterized in that described transparency carrier is provided with refractive index, be provided with refractive index in the described down diffusion coating and be 1.4～1.75 following diffusion particle, described diffusion particle does not down contact mutually and disperses to be arranged on the described lower surface, the thickness of described down diffusion coating is that described diffusion particle down is maximum sized 1/2～7/8, and the shared area sum of described diffusion particle down is 1/100 with the described ratio of the area of diffusion coating down.
5. liquid crystal indicator, comprise that is used for a luminous light source assembly, liquid crystal panel assembly and a slice optical diffusion membrane at least, described optical diffusion membrane comprises that one is the transparency carrier that 1.4～1.75 optically transparent material is made by refractive index, it is 1.4～1.7 last diffusion coating that the upper surface of described transparency carrier is provided with refractive index, describedly go up that to be provided with refractive index in the diffusion coating be 1.4～1.75 last diffusion particle, it is characterized in that described go up diffusion particle each other closely contact be distributed on the described upper surface, the described diffusion particle of going up is made up of by following percentage by weight the spheroidal particle of following diameter, 5 μ m:1.21%, 7.5 μ m:3.84%, 10 μ m:8.20%, 12.5 μ m:5.77%, 15 μ m:15.92%, 17.5 μ m:7.7%, 20 μ m:19.03%, 22.5 μ m:16.35%, 25 μ m:9.61%, 27.5 μ m:6.83%, 30 μ m:5.54%, the described arrangement mode of going up diffusion particle is a random alignment, and the described thickness of going up diffusion coating is last diffusion particle maximum sized 1/2～7/8.
6. liquid crystal indicator as claimed in claim 5, it is characterized in that described light source assembly comprises light source, light guide plate and reflector plate, described light source is arranged on the side of described light guide plate, and described light source is at least a in cold-cathode fluorescence lamp, external electrode fluorescent lamp, light emitting diode and the hot-cathode fluorescent lamp.
7. liquid crystal indicator as claimed in claim 5, it is characterized in that described light source assembly comprises light source, diffuser plate and reflector plate, described light source is arranged between described diffuser plate and the described reflector plate, and described light source is at least a in cold-cathode fluorescence lamp, external electrode fluorescent lamp, light emitting diode and the hot-cathode fluorescent lamp.
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| CNB2007100701961A CN100462743C (en) | 2007-07-27 | 2007-07-27 | Optical pervasion thin film and LCD device using same |
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| CN100462743C true CN100462743C (en) | 2009-02-18 |
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Cited By (1)
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| CN102436019A (en) * | 2011-10-29 | 2012-05-02 | 合肥乐凯科技产业有限公司 | Optical upper diffusion film and light crystal display backlight source using same |
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| CN101603664B (en) * | 2009-06-23 | 2012-04-11 | 中国乐凯胶片集团公司 | Optical diffusion membrane |
| KR101087244B1 (en) * | 2009-09-29 | 2011-11-29 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device and Backlight Unit |
| GB2474298A (en) * | 2009-10-12 | 2011-04-13 | Iti Scotland Ltd | Light Guide Device |
| CN102109709B (en) * | 2009-12-23 | 2013-06-19 | 东莞市群跃电子材料科技有限公司 | Lower diffusion sheet used in small-sized LCD backlight modules and manufacture method thereof |
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| CN102081177B (en) | 2010-12-03 | 2012-07-04 | 中国乐凯胶片集团公司 | Optical diffusion film and liquid crystal display (LCD) backlight using optical diffusion film |
| CN102565895B (en) * | 2011-12-28 | 2013-09-25 | 南京理工大学常熟研究院有限公司 | Optical diffusion film and method for preparing same |
| CN107290809A (en) * | 2017-07-20 | 2017-10-24 | 武汉华星光电技术有限公司 | The preparation method and display panel of Bewildering resistance layer |
| CN108318950B (en) * | 2018-03-01 | 2020-09-04 | 深圳市华星光电技术有限公司 | Backlight module and diffusion sheet thereof |
| CN109239977A (en) * | 2018-11-12 | 2019-01-18 | 厦门天马微电子有限公司 | A kind of backlight and display panel |
| CN113325494A (en) * | 2021-01-25 | 2021-08-31 | 深圳市隆利科技股份有限公司 | Reflection-enhanced optical film and direct type backlight module applying same |
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