CN106873061B - Printing ink type reflecting film and preparation method thereof - Google Patents
Printing ink type reflecting film and preparation method thereof Download PDFInfo
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- CN106873061B CN106873061B CN201510926199.5A CN201510926199A CN106873061B CN 106873061 B CN106873061 B CN 106873061B CN 201510926199 A CN201510926199 A CN 201510926199A CN 106873061 B CN106873061 B CN 106873061B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/126—Reflex reflectors including curved refracting surface
- G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
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Abstract
The invention relates to the technical field of optical films, in particular to a printing ink type reflecting film for a direct type quantum dot backlight module and a preparation method thereof. The invention provides a printing ink type reflecting film and a preparation method thereof, aiming at solving the problem that the color gamut difference between the middle area and the peripheral area of a backlight display device is larger due to the fact that a backlight module adopts a quantum dot film. The reflective film comprises a reflective layer and an ink layer; the ink layer is printed on one surface of the reflecting layer, and the thickness of the ink layer is 1-2 μm; the ink layer comprises ink and scattering particles, and the scattering particles are bonded on the surface of the reflecting layer through the ink; the particle size of the scattering particles is 4-6 μm. After the reflecting film provided by the invention is used in the backlight module, the color gamut difference between the middle area and the peripheral area of the backlight display device is smaller, and the NTSC reaches 120-130%. The printing ink type reflecting film provided by the invention is used for a direct type quantum dot backlight module.
Description
Technical Field
The invention relates to the technical field of optical films, in particular to a printing ink type reflecting film for a direct type quantum dot backlight module and a preparation method thereof.
Background
What is the color gamut? The simple color gamut can be understood as a range area formed by the number of colors that a certain device can express, and the larger the area is, the more colors the device can express, and the better the effect is. Currently, displays are available in the market with NTSC color gamut ranging from 70% to 80%. Because it uses LEDs to provide a source of light for them, the display gamut width depends in large part on whether the spectrum of the light emitted by the LEDs themselves is full. In order to realize wide color gamut, the backlight source of the display needs to be modified, and the common LED white backlight lamp is difficult to realize high color gamut.
In order to solve the above problems and improve the color gamut of the liquid crystal display, quantum dot technology (quantum dot) is gradually applied to the television display at present, and the quantum dot display technology has no size limitation, and can be used on a small-sized screen and a television screen of more than 80 inches. After the quantum dot technology is adopted, the original yellow fluorescent powder can be replaced by red-emitting and green-emitting nano-scale particles, and a white light source is changed from original blue-yellow mixed light into red-green-blue mixed light, so that a white light spectrum is enriched, and the color gamut area is correspondingly increased.
The backlight module adopting the quantum dot film has a point defect while the total color gamut area is improved. The backlight module using the quantum dot film has the advantages that no matter the LED light is a white light source or a blue light source, the light passes through the middle part and the edge area of the quantum dot film, the optical path difference exists, the conversion efficiency of red, green and blue light in the middle part and the edge area is different, the NTSC color gamut area of the middle part and the NTSC color gamut area of the edge area are different, and the displayed color expressive force is different.
Disclosure of Invention
The invention provides a printing ink type reflecting film and a preparation method thereof, aiming at solving the problem that the color gamut difference between the middle area and the peripheral area of a backlight display device is larger due to the fact that a backlight module adopts a quantum dot film. After the reflecting film provided by the invention is used in the backlight module, the color gamut difference between the middle area and the peripheral area of the backlight display device is smaller, and the NTSC reaches 120-130%. The preparation method provided by the invention is simple in process and easy to operate. The printing ink type reflecting film provided by the invention is used for a direct type quantum dot backlight module.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a printing ink type reflecting film, which comprises a reflecting layer and a blue ink layer; the ink layer is printed on one surface of the reflecting layer, and the thickness of the ink layer is 1-2 μm; the ink layer comprises ink and scattering particles, and the scattering particles are bonded on the surface of the reflecting layer through the ink; the particle size of the scattering particles is 4-6 μm.
Further, the scattering particles have a uniform particle diameter.
Furthermore, in the ink layer, the shape of the scattering particles is not limited. Further, the scattering particles are in the shape of solid spheres or hollow spheres.
When the thickness of the ink layer is less than 1 μm, the hardness of the ink layer is low, and the stiffness of the reflective film is low, which is not favorable for transportation and installation. When the thickness of the ink layer is more than 2 μm, the hardness of the ink layer is unchanged, the stiffness of the ink layer is not changed greatly, and the ink layer is not beneficial to saving materials and protecting the environment.
Furthermore, the ink layer is environment-friendly UV ink, and in the using process, volatile solvents are not generated, so that the ink is non-flammable and is beneficial to environmental protection.
Further, in the printing ink type reflective film, the scattering particles are selected from one or a combination of at least two of Polymethylmethacrylate (PMMA) particles, polyethylene terephthalate (PET) particles, polybutylene terephthalate (PBT) particles, polyethylene naphthalate (PEN) particles, MS particles, or Polystyrene (PS) particles.
Further, the light refractive index of the scattering particles is 1.4-1.75.
In the printing ink type reflective film, the ink layer is formed by curing ink, the ink contains polymerizable prepolymer, and the polymerizable prepolymer is selected from polyester acrylate resin or polyurethane acrylate resin.
The refractive index of the polymerizable prepolymer is 1.2 to 1.65.
The polymerizable prepolymer is preferably a polyester acrylate resin. The polymerizable prepolymer is made of a material having a high refractive index, and can have excellent brightness.
Further, the ink layer is transparent.
Further, in the printing ink type reflecting film, in the preparation process, the ink comprises blue primary color ink and a diluent, and the weight ratio of the blue primary color ink to the diluent is 1: 4.5-5.5.
The ratio of the blue primary color ink to the diluent is used for adjusting the ratio of the shade of the color of the ink. The greater the proportion of diluent, the lighter the colour.
Further, the color of the ink is blue. The blue shade of the ink is not limited, from light blue to dark blue.
Further, in the printing ink type reflecting film, in the preparation process, the addition amount of the scattering particles is 4-6% of the total weight of the ink.
Further, the amount of the scattering particles added is 5% of the total amount of the ink.
Further, in the printing ink type reflective film, the reflective layer is a polyester film.
Further, in the printing ink type reflective film, the reflective layer is a white opaque film.
Further, the reflective layer is an existing reflective film.
Further, the reflective layer is a polyester film manufactured by Ningbo Yang technologies Inc., under the trade name DJX 188.
Furthermore, in the printing ink type reflecting film, in the preparation process, the addition amount of the scattering particles is 4-6% of the total weight of the printing ink; the ink comprises blue primary color ink and a diluent, wherein the weight ratio of the blue primary color ink to the diluent is 1: 4.5-5.5; the ink comprises a polymerizable prepolymer which is polyester acrylate resin or polyurethane acrylic resin; the scattering particles are in the shape of solid spheres or hollow spheres, and are selected from one of polymethyl methacrylate (PMMA) particles, polyethylene terephthalate (PET) particles, polybutylene terephthalate (PBT) particles, polyethylene naphthalate (PEN) particles, MS particles or Polystyrene (PS) particles.
In the technical scheme that this application provided, add blue printing ink layer and be used for adjusting the proportion of these three-color light of red blue green, make the gamut difference of middle zone and regional light all around less, the diffusion particle's addition is in order to provide the diffusion function of light to a certain extent, and the addition of diffusion particle also can cause the influence to the gamut scope.
The invention also provides a direct type quantum dot backlight module which comprises a light source, a reflecting film, a diffusion sheet, a quantum dot film and a prism sheet, wherein the reflecting film is the printing ink type reflecting film.
The invention also provides a preparation method of the printing ink type reflecting film, which comprises the following steps:
(1) preheating the prepared reflecting film, wherein the reflecting film is used as a reflecting layer and is preheated for 15-90s by adopting near infrared rays and far infrared rays;
(2) uniformly mixing the raw materials of the ink layer, and coating the mixture on the surface of the preheated reflecting film in a printing mode, wherein the thickness of the ink layer is 1-2 mu m;
(3) and curing the printed reflecting film under a UV curing machine.
Further, in the above preparation method:
(1) keeping the room temperature and humidity constant, preferably 18-25 deg.C; a yellow fluorescent lamp is adopted indoors, so that direct irradiation of sunlight is avoided.
(2) Mixing the raw materials of the ink layer, and adjusting the color, viscosity, concentration and thickness of the ink layer, wherein the thickness of the ink layer is preferably 1-2 μm.
(3) Preheating the prepared reflective film by near infrared ray, far infrared ray, etc. for 15-90 s.
(4) And coating the adjusted ink on the surface of the prepared reflecting film in a printing mode.
(5) And curing the printed reflecting film under a UV curing machine. The curing time depends on the blue depth, concentration and thickness of the ink layer. Further, the power of the UV curing machine is 80-120w/cm2。
Further, the ink layer is printed on one surface of the reflecting layer by adopting a printing mode. The printing mode is selected from one of offset printing, screen printing, flexible printing, gravure printing or ink jet printing.
Further, in the step (2), the color formulation of the ink is as follows:
(1) blending dark blue ink: and gradually adding a small amount of diluting agent (also called diluent) in a certain proportion into the blue primary ink, and uniformly stirring to obtain the dark blue ink.
(2) Blending light blue ink: and gradually adding a small amount of blue primary color ink into a thinner (also called a thinner) according to a certain proportion, and uniformly stirring to obtain the light blue ink.
The reflecting film provided by the invention has the beneficial effects that: the film of the invention can increase the NTSC 110-119% of common products which only adopt quantum dot films to NTSC 120-130%. In addition, besides better color expressive force, various defects in the coating process are avoided and the yield is improved due to the printing mode; because no solvent is used, the method is better than the traditional thermosetting method in the aspects of environmental protection and safety; the blue ink is printed on the surface of the substrate, so that the process difficulty of the polyester reflective film of the substrate is reduced, and the production efficiency is improved. The printing ink type reflecting film provided by the invention is used for a quantum dot film backlight module.
Compared with the existing reflecting film, the printing ink type reflecting film provided by the invention has a high NTSC value (greater than or equal to 120%), good color expression and high brightness uniformity. After the printing ink type reflecting film provided by the invention is applied to the backlight module, the color gamut difference between the central area and the peripheral area of the backlight display device is smaller.
Drawings
FIG. 1 is a schematic structural view of a printed ink type reflective film provided by the present invention;
fig. 2 is a schematic structural diagram of a direct type quantum dot backlight module provided in the present invention.
Detailed Description
The technical solution of the present invention is further explained below with reference to the examples and the accompanying drawings.
As shown in fig. 1, the present invention provides a printing ink type reflective film 10, which includes a reflective layer 1 and a blue ink layer 2; the ink layer 2 is printed on one surface of the reflecting layer 1, and the thickness of the ink layer 2 is 1-2 μm; the ink layer comprises ink and scattering particles, and the scattering particles are bonded on the surface of the reflecting layer through the ink; the particle size of the scattering particles is 4-6 μm.
As shown in fig. 2, the present invention provides a direct type quantum dot backlight module, which includes an LED lamp 50, a reflective film 10 provided in the present invention, a diffuser plate 20, a quantum dot film 30, and a prism film 40; the LED lamp 50 is arranged right below the diffusion plate 20 and above the reflection film 10, the quantum dot film 30 is arranged above the diffusion plate 20, and the prism film 40 is arranged on the quantum dot film 30.
The performance of the printing ink type reflecting film provided by the invention is tested by adopting the following method:
A. and (3) testing brightness uniformity: a42-inch film was placed in a 42-inch backlight module, and the uniformity was measured by a luminance meter (model BM-7A, manufactured by Fushda scientific instruments, Suzhou). Higher brightness uniformity indicates more uniform light emission.
B. Color gamut testing: a32-inch diaphragm is placed in a 32-inch display, after the display is adjusted to a specified working state, full-field red, green and blue signals are input into the display, chromaticity coordinates of a central area and a peripheral area are respectively tested by a brightness instrument (model: BM-7A), and NTSC is calculated by a fixed formula. And (3) measuring the chromaticity coordinates of 8 points in the total of four corners and the midpoints of four sides of the display, and taking the average value of the 8 points as the chromaticity coordinates of the peripheral area. The chromaticity coordinates of the display are detected by taking 9 points in the peripheral line on the display, and the average value of the 9 points is taken as the chromaticity coordinates of the central area. The difference of the NTSC value of the center region minus the NTSC value of the peripheral region is called Δ NTSC. The lower Δ NTSC, the closer the gamut area representing the center region and the gamut area representing the peripheral region, the smaller the difference.
C. And (3) hardness testing: the test conditions were carried out according to ASTM D3363 using a DD-3086 electric pencil hardness tester.
D. And (3) stiffness testing: cutting each film material to be compared into strip-shaped films of 5cm multiplied by 30cm, placing one end of each film in parallel at the edge of a desk, pressing a heavy object on the film, wherein the length of the film part on the desk top is 10cm, the length of the film part extending out of the desk top is 20cm, dividing the horizontal distance d from the bent tail end of each film to the edge of the desk top by 20cm to obtain a stiffness coefficient, and the greater the stiffness coefficient, the better the stiffness of each film is.
The reflective layers used in the examples and comparative examples were polyester film available from Ningbo Yang science Inc. under the trade designation DJX 188. The blue primary color ink and the diluent are produced by Jinxuan science and technology development Limited company in Tianjin.
The printing ink type reflecting film provided by the embodiment is used for a quantum dot film backlight module.
Example 1
The invention provides a printing ink type reflecting film, which comprises a reflecting layer and a blue ink layer; the ink layer is printed on one surface of the reflecting layer; the ink layer comprises ink and scattering particles, and the scattering particles are bonded on the surface of the reflecting layer through the ink. Wherein,
in the preparation process, the blue primary color ink: a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink is a polyester acrylate resin,
the scattering particles are solid spherical PET particles, the particle size of the particles is 4 mu m, the adding amount of the scattering particles is 4 percent of the total amount of the printing ink, the total thickness of the finished product is 189.5 mu m, and the thickness of the printing ink layer is 1.5 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 2
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PBT particles, the particle diameter of the particles is 5 μm, the addition amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 189.5 μm, and the thickness of the ink layer is 1.5 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 3
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical PET particles having a particle size of 6 μm, and the amount added was 6% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, in which the thickness of the ink layer was 1.5 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 4
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical MS particles having a particle diameter of 5 μm, and the amount added was 5% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, in which the thickness of the ink layer was 1.5 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 5
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical polystyrene particles, the particle diameter of the particles is 5 μm, the adding amount is 4% of the total amount of the ink, the total thickness of the finished product is 189.5 μm, and the thickness of the ink layer is 1.5 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 6
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained hollow spherical PEN particles having a particle size of 5 μm, and the amount added was 6% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, wherein the thickness of the ink layer was 1.5 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 7
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PBT particles, the particle diameter of the particles is 5 microns, the adding amount of the particles is 4% of the total amount of the ink, the total thickness of the finished product is 189 microns, and the thickness of the ink layer is 1 micron.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 8
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymeric prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PET particles, the particle size is 5 μm, the adding amount is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 9
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting the ink with a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical MS particles, the particle size of the particles is 5 mu m, the addition amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 mu m, and the thickness of the ink layer is 2 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 10
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting the ink with a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size of the particles is 5 mu m, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 mu m, and the thickness of the ink layer is 2 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 11
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size is 5 μm, the addition amount is 5% of the total amount of the ink, the total thickness of the finished product is 189 μm, and the thickness of the ink layer is 1 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 12
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains hollow spherical PET particles, the particle size is 5 μm, the addition amount is 5% of the total amount of the ink, the total thickness of the finished product is 189 μm, and the thickness of the ink layer is 1 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 13
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains hollow spherical PET particles, the particle size is 5 μm, the adding amount is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 14
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting the ink with a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PMMA particles, the particle size of the particles is 4 mu m, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 mu m, and the thickness of the ink layer is 2 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 15
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting agent 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PEN particles, the particle size of the particles is 6 microns, the addition amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 microns, and the thickness of the ink layer is 2 microns.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 16
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymeric prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical MS particles, the particle diameter of the particles is 4 μm, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 17
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting the ink with a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size of the particles is 4 mu m, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 mu m, and the thickness of the ink layer is 2 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 18
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymeric prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical MS particles, the particle diameter of the particles is 6 μm, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 19
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting the ink with a diluent of 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size of the particles is 6 microns, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 microns, and the thickness of the ink layer is 2 microns.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 20
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size is 6 μm, the addition amount is 5% of the total amount of the ink, the total thickness of the finished product is 189 μm, and the thickness of the ink layer is 1 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 21
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PS particles, the particle size is 4 μm, the addition amount is 5% of the total amount of the ink, the total thickness of the finished product is 189 μm, and the thickness of the ink layer is 1 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 22
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains hollow spherical PET particles, the particle size is 4 μm, the adding amount is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 23
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: and (3) diluting agent 1:5, wherein the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains hollow spherical PEN particles, the particle size of the particles is 6 microns, the adding amount of the particles is 5% of the total amount of the ink, the total thickness of the finished product is 190 microns, and the thickness of the ink layer is 2 microns.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 24
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyurethane acrylate resin, the ink layer contains solid spherical PS particles, the particle size is 5 μm, the adding amount is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 25
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyurethane acrylate resin, the ink layer contains hollow spherical PBT particles, the particle size of the particles is 4 mu m, the adding amount of the particles is 5 percent of the total amount of the ink, the total thickness of the finished product is 190 mu m, and the thickness of the ink layer is 2 mu m.
The properties of the resulting printing ink type reflective film are shown in table 1.
Example 26
The printed ink type reflective film as provided in example 1, wherein,
in the preparation process, the blue primary color ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains hollow spherical PET particles, the particle size is 6 μm, the adding amount is 5% of the total amount of the ink, the total thickness of the finished product is 190 μm, and the thickness of the ink layer is 2 μm.
The properties of the resulting printing ink type reflective film are shown in table 1.
Comparative example 1
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:0, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 2
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:1, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 3
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:2, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 4
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:3, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 5
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:4, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 6
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 7
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:6, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 8
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 188.5 μm, with an ink layer thickness of 0.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 9
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 188.8 μm, with an ink layer thickness of 0.8 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 10
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189 μm, with the ink layer thickness being 1 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 11
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer does not contain particles, and the total thickness of the finished product is 190 μm, wherein the thickness of the ink layer is 2 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 12
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 190.5 μm, with an ink layer thickness of 2.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 13
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 191 μm, with an ink layer thickness of 3 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 14
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a urethane acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 15
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyether acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 16
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was an epoxy acrylate resin, the ink layer contained no particles, and the total thickness of the finished product was 189.5 μm, where the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 17
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical PET particles having a particle diameter of 1 μm, and the amount added was 10% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, in which the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 18
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical PEN particles having a particle size of 2 μm, and the amount added was 9% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, wherein the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 19
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical PET particles having a particle size of 3 μm, and the amount added was 8% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, in which the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 20
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PBT particles, the particle diameter of the particles is 7 μm, the addition amount of the particles is 3% of the total amount of the ink, the total thickness of the finished product is 189.5 μm, and the thickness of the ink layer is 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 21
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner was 1:5, the polymerizable prepolymer contained in the ink layer was a polyester acrylate resin, the ink layer contained solid spherical PET particles having a particle size of 8 μm, and the amount added was 5% of the total amount of the ink, to give a finished product having a total thickness of 189.5 μm, in which the thickness of the ink layer was 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Comparative example 22
The utility model provides a quantum dot membrane is printing ink type reflectance coating for backlight unit, wherein, in the preparation process, blue primary color printing ink: the thinner is 1:5, the polymerizable prepolymer contained in the ink layer is polyester acrylate resin, the ink layer contains solid spherical PMMA particles, the particle size is 10 μm, the adding amount is 2% of the total amount of the ink, the total thickness of the finished product is 189.5 μm, and the thickness of the ink layer is 1.5 μm. The properties of the reflective film obtained in the comparative example are shown in table 2.
Table 1 shows the characteristic parameters and performance test results of the printing ink type reflective films provided in the examples
Table 2 characteristic parameters and main performance test results of the reflective films provided in the comparative examples
As can be seen from the experimental data in tables 1 and 2, the printing ink type reflective film applied to the backlight module of the present invention has a high NTSC value (greater than or equal to 120%), a good color expression, a high brightness uniformity (greater than or equal to 85%), and a low color gamut difference (less than or equal to 2.3%) between the central region and the peripheral region.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All equivalent changes and modifications made according to the disclosure of the present invention are covered by the scope of the claims of the present invention.
Claims (8)
1. A reflective film of the printing ink type, wherein the reflective film comprises a reflective layer and a blue ink layer; the ink layer is printed on one surface of the reflecting layer, and the thickness of the ink layer is 1-2 μm; the ink layer comprises ink and scattering particles, and the scattering particles are bonded on the surface of the reflecting layer through the ink; the particle size of the scattering particles is 4-6 μm;
in the preparation process, the ink comprises blue primary color ink and a diluent, wherein the weight ratio of the blue primary color ink to the diluent is 1: 4.5-5.5; the addition amount of the scattering particles is 4-6% of the total amount of the ink.
2. The reflective film according to claim 1, wherein the scattering particles are selected from one or a combination of at least two of PMMA particles, PET particles, PBT particles, PEN particles, MS particles, or PS particles.
3. The reflective film according to claim 1, wherein the ink layer is formed by curing an ink containing a polymerizable prepolymer, and the polymerizable prepolymer is one selected from a polyester acrylate resin and a urethane acrylate resin.
4. The printed ink reflective film of claim 1, wherein the ink layer is transparent.
5. The reflective film according to claim 1, wherein said reflective layer is a polyester film.
6. The reflective film according to claim 1, wherein the ink contains a polymerizable prepolymer which is a polyester acrylate resin or a polyurethane acrylate resin; the scattering particles are in the shape of solid spheres or hollow spheres, and are selected from one of polymethyl methacrylate (PMMA) particles, polyethylene terephthalate (PET) particles, polybutylene terephthalate (PBT) particles, polyethylene naphthalate (PEN) particles, MS particles or Polystyrene (PS) particles.
7. A direct type quantum dot backlight module, characterized in that, the backlight module comprises a light source, a reflective film, a diffusion sheet, a quantum dot film, a prism sheet, the reflective film is the printing ink type reflective film of claim 1.
8. A method for preparing a reflective film according to claim 1, comprising the steps of:
(1) preheating the prepared reflecting film, wherein the reflecting film is used as a reflecting layer and is preheated for 15-90s by adopting near infrared rays and far infrared rays;
(2) uniformly mixing the raw materials of the ink layer, and coating the mixture on the surface of the preheated reflecting film in a printing mode, wherein the thickness of the ink layer is 1-2 mu m;
(3) and curing the printed reflecting film under a UV curing machine.
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| CN1892341A (en) * | 2005-07-09 | 2007-01-10 | 群康科技(深圳)有限公司 | Light-guiding plate and back-light module group using same and liquid-crystal display |
| CN105068315A (en) * | 2015-09-01 | 2015-11-18 | 深圳Tcl新技术有限公司 | Blue light LED direct type backlight module and liquid crystal display screen |
| CN105068316A (en) * | 2015-09-09 | 2015-11-18 | 青岛海信电器股份有限公司 | Backlight module and display device |
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| CN102661544B (en) * | 2012-04-27 | 2015-09-02 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal indicator |
| TW201447434A (en) * | 2013-06-11 | 2014-12-16 | Au Optronics Corp | Backlight module |
| US9720135B2 (en) * | 2014-05-01 | 2017-08-01 | Ppg Industries Ohio, Inc. | Retroreflective colorants |
| CN105109166B (en) * | 2015-09-11 | 2017-10-20 | 宁波长阳科技股份有限公司 | A kind of anti-absorption application type reflection polyester film and preparation method thereof |
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| CN1892341A (en) * | 2005-07-09 | 2007-01-10 | 群康科技(深圳)有限公司 | Light-guiding plate and back-light module group using same and liquid-crystal display |
| CN105068315A (en) * | 2015-09-01 | 2015-11-18 | 深圳Tcl新技术有限公司 | Blue light LED direct type backlight module and liquid crystal display screen |
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