CN103869391A - Color reinforcing film, and utilization structure, utilization method and manufacturing method of the color reinforcing film - Google Patents
Color reinforcing film, and utilization structure, utilization method and manufacturing method of the color reinforcing film Download PDFInfo
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- CN103869391A CN103869391A CN201410119985.XA CN201410119985A CN103869391A CN 103869391 A CN103869391 A CN 103869391A CN 201410119985 A CN201410119985 A CN 201410119985A CN 103869391 A CN103869391 A CN 103869391A
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Abstract
The invention discloses a color reinforcing film and a utilization structure, a utilization method and a manufacturing method of the color reinforcing film. Scattering type nanometer particles with surface plasma basic element properties, red lighting quantum dots and green lighting quantum dots are mixed in transparent base materials. A blue light source is used in a coordination mode. Blue light parts emitted by the blue face-shaped light source stimulate surface plasma base elements of silver nanometer particles to resonate. Photon energy stimulates, through mechanisms such as close field stimulation, energy transmission and multiple scattering, the green lighting quantum dots to light green light, and the green light become a green part in backlight. The photon energy stimulates, through the mechanisms such as close field stimulation, energy transmission and multiple scattering, the red lighting quantum dots to light red light, and the red light become a red part in the backlight. Three kinds of base color light form the background light wide in color domain, and the background light has higher luminance. Moreover, due to the fact that light absorption and light emission of a single quantum dot are increased, the total number of quantum dots needed by generating the same luminance is reduced, so that manufacturing cost is reduced.
Description
Technical field
The present invention disclose a kind of can efficiently and at low cost increase color flat panel display shown go out the complex optical film that contains inorganic nanoparticles of colour gamut of color, particularly a kind of color enhancement film, belongs to technical field of function materials.
Background technology
From the late period nineties 20th century, color flat panel display has just had more and more extensive and important application in daily life, and its range of application has comprised TV, desktop computer, panel computer, mobile phone etc.The shown color of flat-panel monitor of the prior art depends primarily on the color component of display backlight light that send in source, and existing main flow color flat panel display normally adopts cold cathode fluorescent tube (CCFL) or white light emitting diode (WLED) as backlight.This type of backlight, because the colour purity of red, green, blue three primary colours is low, causes the color that can show can be confined in a narrower colour gamut, and the colour gamut that domestic flat-panel monitor shows only can reach 70% left and right of NTSC's standard colour gamut.Therefore, the shown picture color of this class display is compared with original objects dimness, distortion.And how to expand at low cost the colour gamut of color flat panel display, be a current study hotspot.
Quantum dot is a kind of nano-scale particle, and its size is conventionally in 0.5 to 25 nanometer.Due to quantum confined effect, changed from small to big by quantum dot size, quantum dot can have wavelength from 400 nanometers to 900 nanometer continuously adjustable photoluminescence peak or electroluminescence peaks.And glow peak half-peak breadth can be below 50 nanometers, monochromaticity is better.From early 1990s, invent high-purity wet chemistry technology of preparing (please refer to: the people such as Bawendi, J. Am. Chem. Soc. 1993,115,8706-8715) of quantum dot.From 2007, invent and improved color monitor with quantum dot and show that the method for colour gamut (please refer to: the people such as Jang, Adv. Mater. 2010,22,3076-3080; Zhang Feng, Xue Jianshe, wear the people such as daybreak, Yao Qi, China is patent formerly: CN202511145U).Above-mentioned these methods directly form the backlight of color flat panel display with quantum dot composite material, and utilize quantum dot launch in three primary colours partly or entirely.But, because the absorption cross-section of single quantum dot itself is little, only there is 0.1 to 10 square nanometers (please refer to: the people such as Ming, J. Phys. Chem. Lett. 2012,3:191-202.), the real quantum dot that forms effective luminescent layer need to be a large amount of, but quantum dot is a kind of raw material of costliness, global Jin You minority supplier supplies commercially produced product, and lowest price is 10,000 every gram of Renminbi, far above the price of gold.If use a large amount of quantum dots can greatly increase display production cost, improve the price of product, so just limit the widespread use of technology.How under low cost, to realize and increase demonstration colour gamut, be still the problem that prior art faces.
Surface phasmon nano particle has important application at optical field.Single Ag nano particle, due to the resonance effects of its surface plasma, can have 10,000 to 1,000, the optical scattering interface of 000 square nanometers, be quantum dot absorption cross-section 1,000 to 10,000,000 times (please refer to: the people such as Ming, J. Phys. Chem. Lett. 2012,3:191-202).Utilize the coupling of surface phasmon nano particle and quantum dot, can excite by near field, the mechanism such as energy transmission, multiple scattering, greatly improve light absorption and the light transmitting of quantum dot, the overall fluorescent brightness that strengthens quantum dot (please refer to: the people such as Akimov, Nature 2007,450:402-406.And the people such as Ming, Nano Lett. 2011,11:2296-2303).But to so far, not yet there is the quantum dot light of enhancing to absorb and light transmitting, reduce quantum dot consumption, under low cost, increase thereby realize the trial that shows colour gamut.
Summary of the invention
For the shortcoming that gamut range is narrower or manufacturing cost is higher of the above-mentioned panel display screen of the prior art of mentioning, the invention provides a kind of new color enhancement film, it is mixed with the scatter-type nano particle with surface phasmon character in residuite, emitting red light quantum dot and green emitting quantum dot, it coordinates blue-light source to use, the blue light part that blue flat light source sends excites the surface plasmon resonance of silver nano-grain, photon energy excites by near field, energy transmits, the mechanism such as multiple scattering excite green emitting quantum dot and make it send green light, become the green portion in backlight, photon energy excites by near field, energy transmits, the machine-processed excitated red luminescent quantum dot such as multiple scattering also makes it send red light, become the red part in backlight, form the wide bias light of colour gamut by three primary colours light.
The technical scheme that the present invention solves its technical matters employing is: a kind of color enhancement film, color enhancement film comprises residuite and is evenly arranged on light scattering type nano particle and the photoluminescence type nano particle in residuite, described light scattering type nano particle is the nano particle with surface plasma body resonant vibration character, described photoluminescence type nano particle is quantum dot, and quantum dot comprises the quantum dot of transmitting green light and the quantum dot of red-emitting.
A use structure for color enhancement film described above, this structure comprises color enhancement film and blue flat light source, color enhancement film is attached to blue flat light source top.
A method for making for color enhancement film described above, the method comprises the steps:
(1), at 20 degrees Celsius, under the condition of a standard atmospheric pressure, light scattering type nano particle, the mass percent that is 0.01% to 0.5% by massfraction is that the matrix that 0.01% to 1% luminescent quantum dot is 99% to 99.98% with mass percent mixes;
(2), to be mixed evenly after, then add matrix precursor polymerization initiator, continue to be mixed to evenly;
(3), the solution mixing is transferred in baking oven;
(4), from baking oven, take out, by coating method film forming on smooth glass substrate, glass substrate and film are together transferred in baking oven, leave standstill sclerosis;
(5), from baking oven, take out, and press required size cutting, form color enhancement film.
A kind of using method of color enhancement film described above, this using method is the light-emitting area that color enhancement film consistent with blue flat light source area size is laid on to blue flat light source, the blue light part that blue flat light source sends sees through color enhancement film, become the blue composition in backlight, the surface plasmon resonance of the blue light part exciting light scatter-type nano particle that blue flat light source sends, photon energy excites by near field, energy transmission and multiple scattering mechanism excite green emitting quantum dot and send green light, become the green portion in backlight, photon energy excites by near field, energy transmission and the multiple scattering excitated red luminescent quantum dot of mechanism are also sent red light, become the red part in backlight.
The technical scheme that the present invention solves its technical matters employing further comprises:
Described residuite is that hard material or soft material are made, and hard material is glass, polyacrylate or polycarbonate; Soft material is one or more the potpourri in thin polyacrylate, polycarbonate, silica resin, epoxy resin, polypropylene, tygon, Polyvinylchloride and polystyrene.
Described light scattering type nano particle is silver nano-grain, gold nano grain or gold and silver composite nanometer particle.
Described silver nano-grain is silver nanoparticle ball, silver nanoparticle rod, silver nanocubes or silver nanoparticle polyhedron, and the mean grain size of silver nano-grain is 30 nanometer to 300 nanometers.
Described gold nano grain is gold nanosphere, gold nanorods, gold nano cube or gold nano polyhedron, and the mean grain size of gold nano grain is 50 nanometer to 300 nanometers.
Described gold and silver composite nanometer particle is gold and silver core-shell nano rectangular parallelepiped, and the mean grain size of gold and silver composite nanometer particle is 50 to 300 nanometers.
Described quantum dot is nucleocapsid structure or nucleocapsid shell structure.
The invention has the beneficial effects as follows: the present invention comprises scatter-type nano particle, emitting red light quantum dot and the green emitting quantum dot with surface phasmon character in printing opacity matrix.Emitting red light quantum dot is being subject to after blue-light excited to send high-purity, and the ruddiness of narrow linewidth more approaches the very popular actor or actress of CIE1931 chrominance space.Green emitting quantum dot is being subject to after blue-light excited to send high-purity, and the green glow of narrow linewidth more approaches the green angle of CIE1931 chrominance space.And the red light of sending, green light can be formed on colour gamut larger than the standard colour gamut of NTSC defined in CIE1931 chrominance space with the mixed light of blue light.Surface phasmon nano particle has than quantum dot and exceeds 1,000 to 10,000, the optical cross section of 000 times, after being coupled with quantum dot, can fundamentally improve light absorption and the fluorescent emission ability of quantum dot, the color enhancement film generating, has more high brightness.Moreover, because light absorption and the light transmitting of single quantum dot are increased, the total amount that produces the required quantum dot of same brightness reduces, thereby has reduced cost of manufacture.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the silver nanoparticle Use of The Polygonal Mirror Scanner Electronic Speculum figure that is of a size of 100 nanometers in the present invention.
Fig. 3 is the transmission electron microscope picture that is of a size of the CdTe quantum dot of 5 nanometers in the present invention.
Fig. 4 is the photoluminescence spectrogram of the present invention under 380 nanocomposite optical wavelength light excite.
Fig. 5 is the use-pattern structural representation of the present invention when for generation of the high colour gamut light source of high brightness.
Fig. 6 is the present invention is the luminous superimposed light spectrogram of transmission under blue LED (BLED) illumination of 450 nano wave lengths at emission peak.
Fig. 7 is the luminous stack spectral of transmission of the present invention corresponding gamut map in CIE1931 chrominance space.
Embodiment
The present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with the present embodiment or approximate with basic structure, all within protection domain of the present invention.
Please refer to accompanying drawing 1, the present invention mainly comprises residuite 1 and is arranged on light scattering type nano particle 2 and the photoluminescence type nano particle in residuite 1, matrix 1 is the matrix 1 at a certain particular optical wave band iuuminting, in the present embodiment, particular optical wave band refers to that wavelength is at 350 nanometer to 750 nanocomposite optical wave bands, when concrete enforcement, also can select according to actual needs the printing opacity matrix 1 of other particular optical wave bands, in the present embodiment, the optical transmittance of the matrix 1 of printing opacity in described optical region is more than or equal to 70%, preferably the optical transmittance in described optical region is more than or equal to 80%, more preferably the optical transmittance in described optical region is more than or equal to 90%.Residuite 1 can be adopted as hard material or soft material is made, and hard material can adopt glass, polyacrylate or polycarbonate; Soft material can adopt one or more the potpourri in thin polyacrylate, polycarbonate, silica resin, epoxy resin, polypropylene, tygon, Polyvinylchloride or polystyrene.Matrix 1 in the present embodiment is in 550 nanometer optical wave strong points, and 20 degrees Celsius, under an atmospheric condition, its light refractive index can be between 1.3 to 1.9, is preferably between 1.45 to 1.8.
In the present embodiment, the mass percent of color enhancement film 5 mesostromas 1 is 98.5% to 99.9%, and wherein, in color enhancement film 5, the mass percent of light scattering type nano particle 2 is 0.01% to 0.5%, and more excellent is 0.02% to 0.2%, and more excellent is 0.05% to 0.1%; In color enhancement film 5, the mass percent of quantum dot is 0.01% to 1%, and more excellent is 0.02% to 0.2%.In the present embodiment, the thickness of color enhancement film 5 is 0.05 to 3 millimeter, and more excellent is 0.1 to 2 millimeter, and more excellent is 0.2 to 1 millimeter.Color enhancement film 5 is in film thickness direction, and the optical transmittance in 400 nanometer to 500 nano wavebands is 60% to 10%, and more excellent is 50% to 20%.
In the present embodiment, light scattering type nano particle 2 can adopt the nano particle with surface plasma body resonant vibration character, and described light scattering type nano particle 2 can be silver nano-grain, gold nano grain or gold and silver composite nanometer particle.Described silver nano-grain can be silver nanoparticle ball, silver nanoparticle rod, silver nanocubes or silver nanoparticle polyhedron, the mean grain size of silver nano-grain is 30 nanometer to 300 nanometers, more excellent mean grain size is 100 nanometer to 300 nanometers, please refer to accompanying drawing 2, in accompanying drawing 2, be the silver nanoparticle Use of The Polygonal Mirror Scanner Electronic Speculum figure of mean grain size 100 nanometers.Described gold nano grain can be gold nanosphere, gold nanorods, gold nano cube or gold nano polyhedron, and the mean grain size of gold nano grain is 50 nanometer to 300 nanometers, and more excellent mean grain size is 100 nanometer to 300 nanometers.Described gold and silver composite nanometer particle can be gold and silver core-shell nano rectangular parallelepiped, and the mean grain size of gold and silver composite nanometer particle is 50 to 300 nanometers.Described light scattering type nano particle 2, except above-mentioned particle, also can be other and has nanometer or the micron particles in large optical scattering cross section.Light scattering type nano particle 2 is in opthalmic optics's response wave band, and wavelength is 10,000 to 1,000 in the highest optical scattering cross section of 400 nanometer to 700 nanocomposite optical wave bands, 000 square nanometers, and more excellent is 100,000 to 1,000,000 square nanometers.
In the present embodiment, photoluminescence type nano particle is quantum dot, quantum dot can be the semiconductor nano that II-VI family in the periodic table of elements or III-V family element form, for example: ZnTe, ZnSe, ZnS, ZnO, AgS, CdTe, CdSe, CdS, CdO, InSb, InAs or InP, please refer to accompanying drawing 3, Fig. 3 is the CdTe quantum dot transmission electron microscope picture of the red-emitting of mean grain size 5 nanometers.In the present embodiment, quantum dot except can adopt above-mentioned nanocrystalline, also can be core/shell structure, for example: CdSe/CdS, CdTe/CdS, CdZnSe/CdZnS or CdSe/CdZnS; Or also can be core/shell/shell structure, for example: CdSe/CdS/ZnS or CdTe/CdS/ZnS.In the present embodiment, quantum dot comprises a kind of quantum dot 4 of transmitting green light and a kind of quantum dot 3 of red-emitting, wherein, the emission peak of the quantum dot 4 of transmitting green light is between 510 nanometer to 540 nanocomposite optical wave bands, preferred emission peak value is between 515 nanometer to 530 nanometers, below half-peak breadth 50 nanometers of the quantum dot 4 of transmitting green light, preferably half-peak breadth is below 40, and more excellent is below 30 nanometers; The emission peak of the quantum dot 3 of red-emitting is between 610 nanometer to 660 nanocomposite optical wave bands, preferred emission peak value is between 635 nanometer to 655 nanometers, the half-peak breadth of the quantum dot 3 of red-emitting is below 70 nanometers, and preferably half-peak breadth is below 60 nanometers, and more excellent half-peak breadth is below 50 nanometers.The fluorescence quantum yield of the quantum dot in the present embodiment should be between 0.5 to 1.0, and preferably, between 0.7 to 1.0, more excellent is between 0.8-1.0.
Please refer to accompanying drawing 4, the fluorescence emission spectrum of the present invention under 380 nanometer excitation wavelengths as shown in Figure 4, in fluorescence emission spectrum in Fig. 4, contain a fluorescence emission peak taking 522 nanometers as peak value, represent the fluorescence of green emitting quantum dot, in fluorescence emission spectrum in Fig. 4, also contain a fluorescence emission peak taking 647 nanometers as peak value, represent the fluorescence of emitting red light quantum dot.
Please refer to accompanying drawing 5, the use structure of the color enhancement film 5 in the present invention as shown in Figure 5, when use, is attached to blue flat light source 6 tops by color enhancement film 5 of the present invention, and itself and the common use of blue flat light source 6 can produce the backlight of wide colour gamut.In the present embodiment, the peak luminous wavelength of blue flat light source 6 is between 430 nanometer to 470 nanocomposite optical wave bands, between preferred 440 nanometer to 460 nanocomposite optical wave bands, further goes preferably between 445 nanometer to 455 nanocomposite optical wave bands.The glow peak half-peak breadth of the blue flat light source 6 in the present embodiment is below 50 nanometers, preferably below 40 nanometers, further preferably below 30 nanometers.In the present embodiment, blue flat light source 6 can be the light guide plate of wire edge illumination blue LED coupling, or also can be the light guide plate of the blue LED coupling of planar back-lighting.Color enhancement film 5 is attached on blue flat light source 6, uses blue flat light source 6 to strengthen film 5 from the single direction illumination color of color enhancement film 5, and in the present embodiment, the peak value of the utilizing emitted light 7 of employing is in 450 nanometers, and emission peak half-peak breadth is 30 nanometers.When use, the blue light that part is launched from blue flat light source 6 penetrates described color enhancement film 5, the surface plasma body resonant vibration of the blue-light excited surface phasmon nano particle of part, and strengthen by near field, the modes such as energy transmission and multiple scattering excite green emitting quantum dot and emitting red light quantum dot, green fluorescence and red fluorescence that green emitting quantum dot and emitting red light quantum dot emission go out, be mixed into backlight 8 with the blue excitation light of transmission, this indigo plant, green, red mixed light is produced high colour gamut light source, backlight and liquid crystal module are used in color flat panel display jointly, can demonstrate abundanter color.
Please refer to accompanying drawing 6, Fig. 6 carries out spectral measurement to above-mentioned mixed light, the spectrum obtaining, and wherein the glow peak taking 450 nanometers as peak value represents the light splitting of blue one-tenth, glow peak taking 522 nanometers as peak value represents the light splitting of green one-tenth, and the glow peak taking 647 nanometers as peak value represents the light splitting of red one-tenth.The spectrum in Fig. 6 is corresponded to the result in CIE1931 chrominance space by Fig. 7, wherein, the large triangle that solid line connects is the corresponding colour gamut of luminous spectrum in Fig. 6, and this colour gamut is 145% of existing CCFL light source colour gamut, is 106% of U.S. TV Programs systems committee standard colour gamut.
The present invention protects a kind of method for making of above-mentioned color enhancement film simultaneously, specific as follows:
Embodiment mono-:
(1) in the present embodiment, selecting polyacrylate is that matrix is (in the present embodiment, be specifically described taking polyacrylate as matrix, when concrete enforcement, also can select other matrix or nano particle), selecting mean grain size is that the silver nanoparticle polyhedron of 300 nanometers is surface phasmon nano particle, glow peak at the CdTe quantum dot of 650 nanocomposite optical wavelength as emitting red light quantum dot, glow peak at the CdTe quantum dot of 520 nanocomposite optical wavelength as green emitting quantum dot.Implementation process is that, taking acrylate monomer as matrix precursor, azo-bis-isobutyl cyanide is matrix precursor polymerization initiator.
(2), first at 20 degrees Celsius, under the condition of a standard atmospheric pressure, silver nanoparticle polyhedron, emitting red light quantum dot, green emitting quantum dot and acrylate are uniformly mixed to 10 minutes to even.In the present embodiment, in potpourri, the polyhedral massfraction of silver nanoparticle is 0.01%, and the massfraction of emitting red light quantum dot is 0.05%, and the massfraction of green emitting quantum dot is 0.1%, and the massfraction of acrylate is 99.84%, and gross mass mark is 100%.
(3) to be mixed evenly after, then to add weight be the azo-bis-isobutyl cyanide of gross mass mark 0.1%, continues to be uniformly mixed 10 minutes to evenly.
(4) solution mixing is transferred in 95 degrees Celsius of baking ovens, leaves standstill 15 minutes, be the solution viscosity that increases sharply herein, and solution is from the watery syrupy shape that becomes herein, but still for clarifying.
(5) from baking oven, take out, use film applicator on smooth glass substrate, to become thickness for 1mm film by coating method, can regulate thickness by controlling the feeding speed of above pulpous state mixed solution and film scraper height and speed, glass substrate and film are together transferred in 60 degrees Celsius of baking ovens, leave standstill sclerosis in 18 hours.
(6) from baking oven, take out, and press required size cutting.
(7) will complete cutting, the area size color enhancement film 5 consistent with blue flat light source 6 will be laid on to the light-emitting area of blue flat light source 6.The blue light part that blue flat light source 6 sends sees through color enhancement film 5, become the blue composition in backlight, the blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy excites by near field, energy transmits, the mechanism such as multiple scattering excite green emitting quantum dot and send green light, become the green portion in backlight, the blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy excites by near field, energy transmits, the machine-processed excitated red luminescent quantum dot such as multiple scattering is also sent red light, become the red part in backlight.
(8) bluish-green red mixed light, through liquid crystal module modulation, demonstrates coloured image.
Embodiment bis-:
(1), selecting polyacrylate is matrix, mean grain size is that the silver nanoparticle polyhedron of 100 nanometers is surface phasmon nano particle, glow peak at the CdTe quantum dot of 645 nanocomposite optical wavelength as emitting red light quantum dot, glow peak at the CdTe quantum dot of 525 nanocomposite optical wavelength as green emitting quantum dot.Implementation process is that, taking acrylate monomer as matrix precursor, azo-bis-isobutyl cyanide is matrix precursor polymerization initiator.
(2), first at 20 degrees Celsius, a normal atmosphere is depressed, and silver nanoparticle polyhedron, emitting red light quantum dot, green emitting quantum dot are mixed evenly with acrylate.In the present embodiment, in potpourri, the polyhedral massfraction of silver nanoparticle is 0.05%, the massfraction of emitting red light quantum dot is 0.1%, the massfraction of green emitting quantum dot is 0.2%, in the present embodiment, the part by weight of Nano Silver and quantum dot total amount is between 1:1 to 1:20, and the massfraction of acrylate is 99.65%, and gross mass mark is 100%.
(3), to be mixed evenly after, then to add weight be the azo-bis-isobutyl cyanide of gross mass mark 0.1%, continues to mix 5 minutes to evenly.
(4), the solution mixing is transferred in 60 degrees Celsius of baking ovens to standing 2 hours.
(5), from baking oven, take out, by coating method film forming on smooth glass substrate.Then, glass substrate and film are together transferred in 60 degrees Celsius of baking ovens, leave standstill sclerosis in 18 hours.
(6), from baking oven, take out, and press required size cutting.
(7), will complete cutting, the color enhancement film 5 that area size is consistent with blue flat light source 6 is laid on the light-emitting area of blue flat light source 6.The blue light part that blue flat light source 6 sends sees through color enhancement film 5, becomes the blue composition in backlight.The blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy by near field excite, the mechanism such as energy transmission, multiple scattering excites green emitting quantum dot and sends green light, becomes the green portion in backlight.The blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy by near field excite, the machine-processed excitated red luminescent quantum dot such as energy transmission, multiple scattering send red light, become the red part in backlight.
(8), bluish-green red mixed light is through liquid crystal module modulation, demonstrates coloured image.
Embodiment tri-:
(1), select a kind of silica resin, dimethyl silicone polymer is matrix, mean grain size is that the silver nanoparticle polyhedron of 200 nanometers is surface phasmon nano particle, glow peak at the CdTe quantum dot of 640 nanocomposite optical wavelength as emitting red light quantum dot, glow peak at the CdTe quantum dot of 520 nanocomposite optical wavelength as green emitting quantum dot.Implementation process is that, taking dimethyl silicone polymer host as matrix precursor, dimethyl silicone polymer rigidizer is matrix precursor polymerization initiator.
(2), first at 20 degrees Celsius, under the condition of a standard atmospheric pressure, silver nanoparticle polyhedron, emitting red light quantum dot, green emitting quantum dot are mixed with dimethyl silicone polymer host, be uniformly dispersed by ultrasonic processing.In potpourri, the polyhedral massfraction of silver nanoparticle is 0.02%, and the massfraction of emitting red light quantum dot is 0.06%, and the massfraction of green emitting quantum dot is 0.12%, and the massfraction of dimethyl silicone polymer host is 99.8%, and gross mass mark is 100%.
(3), to be mixed evenly after, adding weight is the dimethyl silicone polymer hardening agent of gross mass mark 10% again, this is business's product, the name of an article is dimethyl silicone polymer hardening agent, general and dimethyl silicone polymer systems selling, continue to mix 10 minutes to evenly, with the steam bubble in vacuum method discharge potpourri.
(4), the potpourri mixing after also de-bubble is passed through to coating method film forming on smooth glass substrate.
(5), glass substrate and film are together transferred in 120 degrees Celsius of baking ovens to sclerosis in standing 1 hour.
(6), from baking oven, take out, and press required size cutting.
(7), will complete cutting, the color enhancement film 5 that area size is consistent with blue flat light source 6 is laid on the light-emitting area of blue flat light source 6.The blue light part that blue flat light source 6 sends sees through color enhancement film 5, becomes the blue composition in backlight.The blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy by near field excite, the mechanism such as energy transmission, multiple scattering excites green emitting quantum dot and sends green light, becomes the green portion in backlight.The blue light part that blue flat light source 6 sends excites the surface plasmon resonance of silver nano-grain, photon energy by near field excite, the machine-processed excitated red luminescent quantum dot such as energy transmission, multiple scattering send red light, become the red part in backlight.
(8), bluish-green red mixed light is through liquid crystal module modulation, demonstrates coloured image.
Above three embodiment have specifically described the color enhancement film 5 of how making and using as in Fig. 1, above-described embodiment is made and being illustrated method for making of the present invention as an example of several concrete materials example, when concrete enforcement, also can adopt said method to make color enhancement film other materials.In sum, the color enhancement film 5 that above embodiment provides, by by the coupling of surface phasmon type nano particle and quantum dot, and the mechanism such as near field absorption, energy transmission, multiple scattering, produce efficient light absorption and fluorescent emission.In film the consumption of quantum dot matrix 1 quality 0.2% and following, be the consumption of quantum dot much smaller than not using surface phasmon type nano particle.And the consumption of surface phasmon type nano particle matrix 1 quality 0.05% and following.The color enhancement film 5 that above inventive embodiments provides can provide compared with 106% of NTSC's standard colour gamut in CIE1931 chrominance space, the colour gamut that can provide far above existing CCFL light source.The present embodiment is realized and is realized high colour gamut light source with low cost, simple process, for the widespread use of high colour gamut flat pannel display offers an opportunity.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Those skilled in the art can carry out various changes and modification and not depart from spiritual scope of the present invention the present invention.Like this, if of the present invention these amendment and modification belong in the scope of the claims in the present invention and equivalent technologies thereof, the present invention be also intended to comprise these changes and modification interior.
Claims (10)
1. a color enhancement film, it is characterized in that: described color enhancement film comprises residuite and is evenly arranged on light scattering type nano particle and the photoluminescence type nano particle in residuite, described light scattering type nano particle is the nano particle with surface plasma body resonant vibration character, described photoluminescence type nano particle is quantum dot, and quantum dot comprises the quantum dot of transmitting green light and the quantum dot of red-emitting.
2. color enhancement film according to claim 1, is characterized in that: described residuite is that hard material or soft material are made, and hard material is glass, polyacrylate or polycarbonate; Soft material is one or more the potpourri in thin polyacrylate, polycarbonate, silica resin, epoxy resin, polypropylene, tygon, Polyvinylchloride and polystyrene.
3. color enhancement film according to claim 1 and 2, is characterized in that: described light scattering type nano particle is silver nano-grain, gold nano grain or gold and silver composite nanometer particle.
4. color enhancement film according to claim 3, is characterized in that: described silver nano-grain is silver nanoparticle ball, silver nanoparticle rod, silver nanocubes or silver nanoparticle polyhedron, and the mean grain size of silver nano-grain is 30 nanometer to 300 nanometers.
5. color enhancement film according to claim 3, is characterized in that: described gold nano grain is gold nanosphere, gold nanorods, gold nano cube or gold nano polyhedron, and the mean grain size of gold nano grain is 50 nanometer to 300 nanometers.
6. color enhancement film according to claim 3, is characterized in that: described gold and silver composite nanometer particle is gold and silver core-shell nano rectangular parallelepiped, and the mean grain size of gold and silver composite nanometer particle is 50 to 300 nanometers.
7. color enhancement film according to claim 1 and 2, is characterized in that: described quantum dot is nucleocapsid structure or nucleocapsid shell structure.
8. a use structure for color enhancement film as claimed in any of claims 1 to 7 in one of claims, is characterized in that: described structure comprises color enhancement film and blue flat light source, and color enhancement film is attached to blue flat light source top.
9. a method for making for color enhancement film as claimed in any of claims 1 to 7 in one of claims, is characterized in that: described method comprises the steps:
(1), at 20 degrees Celsius, under the condition of a standard atmospheric pressure, light scattering type nano particle, the mass percent that is 0.01% to 0.5% by massfraction is that the matrix that 0.01% to 1% luminescent quantum dot is 99% to 99.98% with mass percent mixes;
(2), to be mixed evenly after, then add matrix precursor polymerization initiator, continue to be mixed to evenly;
(3), the solution mixing is transferred in baking oven;
(4), from baking oven, take out, by coating method film forming on smooth glass substrate, glass substrate and film are together transferred in baking oven, leave standstill sclerosis;
(5), from baking oven, take out, and press required size cutting, form color enhancement film.
10. the using method of color enhancement film as claimed in any of claims 1 to 7 in one of claims, it is characterized in that: described using method is the light-emitting area that color enhancement film consistent with blue flat light source area size is laid on to blue flat light source, the blue light part that blue flat light source sends sees through color enhancement film, become the blue composition in backlight, resonate from primitive in the surface of the blue light part exciting light scatter-type nano particle that blue flat light source sends etc., photon energy excites by near field, energy transmission and multiple scattering mechanism excite green emitting quantum dot and send green light, become the green portion in backlight, photon energy excites by near field, energy transmission and the multiple scattering excitated red luminescent quantum dot of mechanism are also sent red light, become the red part in backlight.
Priority Applications (1)
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| CN109387896A (en) * | 2018-11-07 | 2019-02-26 | 福州大学 | A kind of quantum dot color filter film based on local surface plasma resonance |
| WO2020258767A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市隆利科技股份有限公司 | Quantum dot backlight module and electronic device |
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