阅读说明：本技术 一种修正色坐标的背光模组之银反射片及其制备方法 (Silver reflector of backlight module for correcting color coordinate and preparation method thereof ) 是由 邓建东 陈明源 李庆春 薛海星 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种修正色坐标的背光模组之银反射片及其制备方法,所述银反射片包括从一侧至另一侧依次设置的第一PET层、丙烯酸胶水预涂层、镀银层、贴合层、镀铝层和第二PET层,所述预涂层中包含有蓝色量子点颗粒或蓝色荧光聚苯乙烯微球颗粒,本方法采用蓝色量子点或蓝色荧光聚苯乙烯微球,能够将银反射片的CIE1931色坐标X值或Y值修正至0.28-0.295之间,该稍微偏蓝光的银反射片,经过模块与彩色滤光片,可以使整个LCD系统达到白平衡。(The invention discloses a silver reflector plate of a backlight module for correcting color coordinates and a preparation method thereof, wherein the silver reflector plate comprises a first PET layer, an acrylic glue precoating layer, a silver coating layer, a laminating layer, an aluminum coating layer and a second PET layer which are sequentially arranged from one side to the other side, wherein the precoating layer comprises blue quantum dot particles or blue fluorescent polystyrene microsphere particles, the method adopts blue quantum dots or blue fluorescent polystyrene microspheres, can correct the X value or the Y value of CIE1931 color coordinates of the silver reflector plate to be between 0.28 and 0.295, and the silver reflector plate slightly deviating from blue light can enable the whole LCD system to achieve white balance through a module and a color filter.)

1. A silver reflector plate of a backlight module for correcting color coordinates comprises a first PET layer, a precoating layer, a silver coating layer, an attaching layer, an aluminum coating layer and a second PET layer which are sequentially arranged from one side to the other side, and is characterized in that the precoating layer contains blue quantum dot particles or blue fluorescent polystyrene microsphere particles.

2. The silver reflective sheet for a backlight unit according to claim 1, wherein the first PET layer has a thickness of 23-50 μm.

3. The silver reflective sheet for a backlight unit according to claim 1, wherein the second PET layer has a thickness of 23-75 μm.

4. The silver reflector plate of a backlight module for correcting color coordinates of claim 1, wherein the blue quantum dot particles are ZnCdS quantum dot particles, the emission wavelength is 400-420nm, and the half-peak width is less than or equal to 20 nm.

5. The silver reflective sheet for a backlight unit according to claim 1, wherein the thickness of the silver plating layer is 50-150nm, and the thickness of the aluminum plating layer is 20-70 nm.

6. A method for preparing a silver reflector plate of a backlight module for correcting color coordinates is characterized by comprising the following steps:

step a, preparing a precoating layer main body material, namely preparing the following components in percentage by mass: uniformly mixing 15% of propylene glycol methyl ether, 8% of butyl acrylate, 16% of butyl methacrylate, 25% of methyl methacrylate and 6% of methacrylic acid, 5% of styrene, 21% of initiator Tx21S 3, 1% of dimethylethanolamine and 21% of toluene to prepare a main material;

and b, mixing the main body material and ethyl ester according to the proportion of 1: 5, adding 3-5% of curing agent, and uniformly mixing to obtain a precoating raw material of the acrylic acid glue;

step c, doping the blue quantum dots or the blue fluorescent polystyrene microspheres into the acrylic glue precoating raw material according to the mass percentage of 0.03%, 0.05% and 0.1% to prepare a mixed solution;

d, preparing a first PET layer, and coating the mixed solution obtained in the step c on the first PET layer by using a micro-concave coating machine at the machine speed of 305 m/min and the baking temperature of 110 ℃ to obtain a precoating layer on the first PET layer;

e, silver plating is carried out on the surface of the precoating layer on the first PET layer prepared in the step d by using a film plating machine, the thickness of the silver plating layer is 100nm, the silver plating power is 7.5KW, and the speed of the film plating machine is 135 m/min, so that a PET silver film is obtained;

step f, preparing a second PET layer, and plating aluminum on the second PET layer by using a film plating machine, wherein the thickness of the aluminum plated layer is 45nm, the silver plating power is 12.6KW, and the speed of the film plating machine is 300 m/min to obtain a PET aluminum film;

and h, compounding the PET silver film obtained in the step e and the PET aluminum film obtained in the step f, and adhering the PET silver film and the PET aluminum film by using polyurethane glue under the conditions that the temperature is 85 ℃ and the machine speed is 37 m/min to obtain the reflector plate with the corrected color coordinate.

7. The method as claimed in claim 6, wherein the blue quantum dots are ZnCdS quantum dots, the emission peak wavelength is 400-420nm, the half-peak width is less than 20nm, the ZnCdS quantum dots are dispersed in the toluene at a concentration of 1000mg/L to form a mixture, and the mixture is mixed into 20L of acrylic acid glue in an amount of 0.03%, 0.05% and 0.1% by mass.

8. The method of claim 6, wherein the blue fluorescent polystyrene microspheres are dispersed in the toluene at a concentration of 10000mg/L to form a mixture, and the mixture is added to 20L of acrylic glue by mass percentages of 0.03%, 0.05% and 0.1%.

9. The method as claimed in claim 6, wherein the curing agent is an acrylic curing aid manufactured by Green Photomer of Corning America.

10. The silver reflector sheet for a color coordinate corrected backlight unit as claimed in claim 1, wherein the CIE1931 color coordinate X value or Y value of the silver reflector sheet is 0.28-0.295.

Technical Field

The invention relates to the technical field of optical films, in particular to a silver reflector plate of a backlight module for correcting color coordinates and a preparation method thereof.

Background

In the LCD display, a RGB combination is used, which has three primary colors of red, blue and green, as shown in fig. 1, in CIE1931xy color coordinates, coordinates (0.3 ) indicate white light, but since the reflection passes through the module and the color filter, the system correction color phase will mainly be slightly blue light to achieve the white balance of the whole system, in the LCD design, the color coordinate value in the reflector will be slightly smaller by about 0.295-0.280 to meet the white light definition of the commercial and industrial specifications as a whole, and the current blue correction conventional idea of the reflector is to add a color-changing factor (such as blue pigment) to correct, but this correction method is difficult to achieve the desired blue correction color due to the large pigment particles, difficult precise control of the amount of the pigment, and poor uniformity of color change.

Disclosure of Invention

In order to solve the problems proposed in the background art, the present invention provides a method.

In order to achieve the purpose, the invention provides the following technical scheme:

a silver reflector plate of a backlight module for correcting color coordinates comprises a first PET layer, a precoating layer, a silver coating layer, an attaching layer, an aluminum coating layer and a second PET layer which are sequentially arranged from one side to the other side, wherein the precoating layer contains blue quantum dot particles or blue fluorescent polystyrene microsphere particles.

In some embodiments of the silver reflective sheet for a color coordinate corrected backlight module of the present invention, the thickness of the first PET layer is 23-50 μm.

In some embodiments of the silver reflective sheet of the backlight module for correcting color coordinates according to the present invention, the thickness of the second PET layer is 23-75 μm.

In some embodiments of the silver reflector used as the backlight module for correcting color coordinates of the present invention, the blue quantum dot particles are ZnCdS quantum dot particles, the emission wavelength thereof is 400-420nm, and the half-peak width thereof is less than or equal to 20 nm.

In some embodiments of the silver reflective sheet of the backlight module for correcting color coordinates according to the present invention, the thickness of the silver plating layer is 50-150nm, and the thickness of the aluminum plating layer is 20-70 nm.

A method for preparing a silver reflector of a backlight module for correcting color coordinates comprises the following steps:

step a, preparing a precoating layer main body material, namely preparing the following components in percentage by mass: uniformly mixing 15% of propylene glycol methyl ether, 8% of butyl acrylate, 16% of butyl methacrylate, 25% of methyl methacrylate and 6% of methacrylic acid, 5% of styrene, 21% of initiator Tx21S 3, 1% of dimethylethanolamine and 21% of toluene to prepare a main material;

and b, mixing the main body material and ethyl ester according to the proportion of 1: 5, adding 3-5% of curing agent, and uniformly mixing to obtain a precoating raw material of the acrylic acid glue;

step c, doping the blue quantum dots or the blue fluorescent polystyrene microspheres into the acrylic glue precoating raw material according to the mass percentage of 0.03%, 0.05% and 0.1% to prepare a mixed solution;

d, preparing a first PET layer, and coating the mixed solution obtained in the step c on the first PET layer by using a micro-concave coating machine at the machine speed of 305 m/min and the baking temperature of 110 ℃ to obtain a precoating layer on the first PET layer;

e, silver plating is carried out on the surface of the precoating layer on the first PET layer prepared in the step d by using a film plating machine, the thickness of the silver plating layer is 100nm, the silver plating power is 7.5KW, and the speed of the film plating machine is 135 m/min, so that a PET silver film is obtained;

step f, preparing a second PET layer, and plating aluminum on the second PET layer by using a film plating machine, wherein the thickness of the aluminum plated layer is 45nm, the silver plating power is 12.6KW, and the speed of the film plating machine is 300 m/min to obtain a PET aluminum film;

and h, compounding the PET silver film obtained in the step e and the PET aluminum film obtained in the step f, and adhering the PET silver film and the PET aluminum film by using polyurethane glue under the conditions that the temperature is 85 ℃ and the machine speed is 37 m/min to obtain the reflector plate with the corrected color coordinate.

In some embodiments of the preparation method of the silver reflector plate, the blue quantum dots are ZnCdS quantum dots, the emission peak wavelength is 400-420nm, the half-peak width is less than 20nm, the ZnCdS quantum dots are dispersed in the toluene according to the concentration of 1000mg/L to form a mixed solution, and then the mixed solution is respectively mixed into 20L of acrylic acid glue in the mass percentages of 0.03%, 0.05% and 0.1%.

In some embodiments of the method for preparing a silver reflector plate of the present invention, the blue fluorescent polystyrene microspheres are dispersed in the toluene at a concentration of 10000mg/L to form a mixed solution, and then the mixed solution is mixed into 20L of acrylic glue in a mass percentage of 0.03%, 0.05%, and 0.1%, respectively.

In some embodiments of the method for preparing silver reflective flakes of the present invention, the curing agent is an acrylic curing aid available from Green Photomer of Cochinin, America.

Specifically, the CIE1931 color coordinate X value or Y value of the silver reflector is 0.28-0.295.

Compared with the prior art, the invention has the beneficial effects that: the blue quantum dots and the blue fluorescent polystyrene microspheres are adopted, so that the blue hue is obtained when the blue quantum dots and the blue fluorescent polystyrene microspheres are reflected, various module adjustments can be met, the requirements of different hues can be adjusted and matched by the method, and the maximum brightness requirement can be met; the silver reflector plate of the backlight module for correcting the color coordinate is characterized in that blue quantum dots or blue fluorescent polystyrene microspheres are doped into an acrylic glue precoating layer, and are coated and cured between a first PET layer and a silver coating layer to ensure that the whole silver reverse color plate has a slight blue hue; the hue correction scheme of the invention can also meet the adjustment of various modules, and the method can adjust and match different hue requirements and simultaneously meet the maximum brightness requirement.

Drawings

Fig. 1 is a schematic diagram of CIE1931xy color coordinates.

Fig. 2 is a schematic cross-sectional structure diagram of the reflector of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows: adopting blue quantum dots;

step a, preparing a precoating layer main body material, namely preparing the following components in percentage by mass: uniformly mixing 15% of propylene glycol methyl ether, 8% of butyl acrylate, 16% of butyl methacrylate, 25% of methyl methacrylate and 6% of methacrylic acid, 5% of styrene, 21% of initiator Tx21S 3, 1% of dimethylethanolamine and 21% of toluene to prepare a main material;

and b, mixing the main body material and ethyl ester according to the proportion of 1: 5, adding 3-5% of curing agent, and uniformly mixing to obtain a precoating raw material of the acrylic acid glue;

step c, dispersing ZnCdS quantum dots with emission peak wavelength of 400-420nm and half-peak width of less than 20nm in the toluene according to the concentration of 1000mg/L to form a mixed solution, and doping the mixed solution into 20L of acrylic glue precoat raw materials according to the mass percentages of 0.03%, 0.05% and 0.1% for three times to prepare a mixed solution;

wherein the effective concentration of ZnCdS is as follows:

	0.03％	0.05％	0.1％
				effective concentration (mg) of ZnCdS	6	10	20

D, preparing a first PET layer, and coating the mixed solution obtained in the step c on the first PET layer by using a micro-concave coating machine at the machine speed of 305 m/min and the baking temperature of 110 ℃ to obtain a precoating layer on the first PET layer;

e, silver plating is carried out on the surface of the precoating layer on the first PET layer prepared in the step d by using a film plating machine, the thickness of the silver plating layer is 100nm, the silver plating power is 7.5KW, and the speed of the film plating machine is 135 m/min, so that a PET silver film is obtained;

step f, preparing a second PET layer, and plating aluminum on the second PET layer by using a film plating machine, wherein the thickness of the aluminum plated layer is 45nm, the silver plating power is 12.6KW, and the speed of the film plating machine is 300 m/min to obtain a PET aluminum film;

and h, compounding the PET silver film obtained in the step e and the PET aluminum film obtained in the step f, and adhering the PET silver film and the PET aluminum film by using polyurethane glue under the conditions that the temperature is 85 ℃ and the machine speed is 37 m/min to obtain the reflector plate with the corrected color coordinate.

Example two: adopting blue fluorescent polystyrene microspheres;

in the step c, the blue fluorescent polystyrene microspheres are dispersed in the toluene according to the concentration of 10000mg/L to form a mixed solution, the mixed solution is respectively mixed into 20L of acrylic acid glue according to the mass percentage of 0.03 percent, 0.05 percent and 0.1 percent,

the other steps in the second embodiment are the same as those in the first embodiment, and are not described herein again;

test conditions and experimental results:

and (3) testing conditions are as follows: the test conditions are the in-line specification of optical films for LCD backlight modules, and refer to GB/T1740-2007 or ISO 4611: 2010.

The results of the experiment are as follows:

table one: adopting blue quantum dots;

concentration of	x	y	Δx	Δy	Luminance of a light	Ratio of luminance increase and decrease
							0.03	0.29235	0.28731	-0.00979	-0.0031	8,223	0.41
0.05	0.29221	0.28432	-0.00993	-0.00609	8,205	0.18
							0.1	0.29135	0.28123	-0.01079	-0.00918	8,214	0.29
GF-80W3	0.30214	0.29041	0	0	8,190	-

Table two: adopting blue fluorescent polystyrene microspheres;

remarking: in the two tables described above, the data is shown,

(1) wherein GF-80W3 is the white silver reflective film that light company sold at present, and the test lamp source is 19V/0.04A LED light source, and the test equipment is the ZeroLight CF600 luminance tester.

(2) Δ x and Δ y are differences from GF-80W3, respectively defined as Δ x ═ x-0.30214 and Δ y ═ y-0.29041

Description of the data: blue quantum dots and blue fluorescent polystyrene microspheres are used in the acrylic glue precoating layer,

1) the reduction values of the ZnCdS blue quantum dots delta x are quite consistent, and are reduced to-0.00979, -0.00993 and-0.01079 compared with GF-80W3 which is not added with quantum dots in the original test;

(2) the reduction value of the Delta y of the ZnCdS blue quantum dots is in a linear trend, and is reduced to-0.0031, -0.00609 and-0.00918 compared with the original test of GF-80W3 without quantum dots;

(3) the change of the brightness of the ZnCdS blue quantum dots is basically and slightly improved by about 0.41 percent, 0.18 percent and 0.29 percent compared with GF-80W 3;

(4) the delta x reduction values of the blue fluorescent polystyrene microspheres are quite consistent, and are reduced to-0.00092, -0.00095 and-0.00099 compared with GF-80W3 which is not added with quantum dots in the original test;

(5) the reduction value of the delta y of the blue fluorescent polystyrene microspheres has a linear trend, and is reduced to-0.00126, -0.00133 and-0.00163 compared with the original test of GF-80W3 without quantum dots;

(6) the change of the brightness of the blue fluorescent polystyrene microsphere is slightly reduced, and is lower than GF-80W3 by about-0.16 percent and-0.71 percent and-0.82 percent, the reduction of the brightness is reduced along with the increase of the microsphere and still can be within an acceptable range;

therefore, the optimum condition range of the ZnCdS quantum dots is 0.03-0.1%, the optimum condition is 0.1%, the y value is reduced to 0.28123, and the difference between the y value and the y value is-0.00918, the second time is 0.05%, and the second time is 0.03%;

the blue fluorescent polystyrene microsphere is adopted, the optimal condition range is 0.03-0.1%, the optimal condition range is 0.1%, the y is reduced to 0.28878, and the difference between the y and the non-added microsphere is-0.00163, the next time is 0.05%, and the next time is 0.03%.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.