CN112837612A - Diffusion plate and manufacturing method thereof - Google Patents
Diffusion plate and manufacturing method thereof Download PDFInfo
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- CN112837612A CN112837612A CN202110203180.3A CN202110203180A CN112837612A CN 112837612 A CN112837612 A CN 112837612A CN 202110203180 A CN202110203180 A CN 202110203180A CN 112837612 A CN112837612 A CN 112837612A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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Abstract
The invention provides a diffusion plate and a manufacturing method thereof, wherein the diffusion plate comprises a glass substrate and a light conversion-light diffusion mixed coating arranged on the glass substrate; the light conversion-light diffusion mixed coating comprises a light conversion substance and a light diffusion substance which are uniformly mixed. According to the diffusion plate provided by the invention, the light conversion-light diffusion mixed coating containing the light conversion substance and the light diffusion substance is arranged, so that light can be reflected and refracted for multiple times when passing through the diffusion plate, and light conversion is carried out through the light conversion substance for multiple times, so that the utilization rate of the light conversion substance is improved, and the light conversion efficiency is improved; compared with the existing diffusion plate with the light diffusion coating and the light conversion coating which are independently arranged, the diffusion plate achieves the same optical effect, and the amount of light conversion substances needed by the diffusion plate provided by the invention is less, so that the reduction of the amount of the light conversion substances is facilitated, and the cost of a blue light LED backlight source is reduced.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a diffusion plate and a manufacturing method thereof.
Background
In the blue light LED backlight source, light conversion substances such as fluorescent powder and quantum dot materials are required to be added, a certain proportion of blue light is absorbed, red light and green light are emitted, and white light is mixed by three colors of light according to a proportion; adjusting the color of the backlight source by adjusting the adding proportion of the fluorescent and quantum dot materials; due to the high price of the light conversion substance, especially quantum dot materials, the cost of the blue light LED backlight source is high.
Disclosure of Invention
The invention solves the problem that the cost of the blue LED backlight source is higher due to the higher price of the light conversion substance.
In order to solve the above problems, the present invention provides a diffusion plate, comprising a glass substrate, and a light conversion-light diffusion mixed coating layer disposed on the glass substrate;
the light conversion-light diffusion mixed coating comprises a light conversion substance and a light diffusion substance which are uniformly mixed.
Optionally, the photoconversion-photodiffusion hybrid coating comprises a quantum dot photoconversion-photodiffusion hybrid coating.
Optionally, the thickness of the quantum dot light conversion-light diffusion mixed coating is in a range of 20 μm to 100 μm.
Optionally, a transparent coating is arranged between the glass substrate and the quantum dot light conversion-light diffusion mixed coating; the transparent coating is a high-temperature curing ink layer.
Optionally, the thickness of the transparent coating layer ranges from 10 μm to 15 μm; the light transmittance of the transparent coating is greater than 96%; the haze of the clear coat was 0.
Optionally, a transparent protective layer is further arranged on the outer side of the quantum dot light conversion-light diffusion mixed coating; the light transmittance of the transparent protective layer is greater than 90%; the haze of the transparent protective layer is 0.
Optionally, the light conversion-light diffusion hybrid coating comprises a phosphor light conversion-light diffusion hybrid coating.
Optionally, the thickness of the phosphor light conversion-light diffusion mixed coating ranges from 20 μm to 100 μm.
Optionally, the haze of the diffusion plate ranges from 70% to 100%; the light transmittance of the diffusion plate ranges from 40% to 70%.
Another object of the present invention is to provide a method for manufacturing a diffuser plate, including the steps of:
s1: adding the light diffusion substance into the printing ink, and uniformly mixing to obtain the light diffusion printing ink;
s2: dissolving a light conversion substance in an organic solvent, and uniformly mixing to obtain a light conversion solution;
s3: adding the light conversion solution into the light diffusion printing ink to obtain light conversion-light diffusion mixed printing ink;
s4: uniformly coating the light conversion-light diffusion mixed ink on a glass substrate to obtain a diffusion plate; wherein the number of coating is two, and the feeding direction in the second coating process is opposite to the feeding direction in the first coating process.
Compared with the prior art, the diffusion plate provided by the invention has the following advantages:
according to the diffusion plate provided by the invention, the light conversion-light diffusion mixed coating containing the light conversion substance and the light diffusion substance is arranged, so that light can be reflected and refracted for multiple times when passing through the diffusion plate, and light conversion is carried out through the light conversion substance for multiple times, so that the utilization rate of the light conversion substance is improved, and the light conversion efficiency is improved; compared with the existing diffusion plate with the light diffusion coating and the light conversion coating which are independently arranged, the diffusion plate achieves the same optical effect, and the amount of light conversion substances needed by the diffusion plate provided by the invention is less, so that the reduction of the amount of the light conversion substances is facilitated, and the cost of a blue light LED backlight source is reduced.
Drawings
FIG. 1 is a schematic view of a diffuser plate according to the present invention;
FIG. 2 is a schematic view of a conventional diffuser plate;
FIG. 3 is a simplified diagram of the relative positions of a quantum dot photoconversion-photodiffusion coating and a glass substrate in accordance with the present invention;
FIG. 4 is a schematic view of a diffuser plate according to the present invention;
FIG. 5 is a schematic view showing the structure of a diffusion plate in comparative examples 1 to 3 of the present invention;
FIG. 6 is a schematic view showing the structures of comparative examples 1-1 and 1-2 according to the present invention.
Description of reference numerals:
1-a glass substrate; 2-quantum dot photoconversion-photodiffusion coating; 3-a transparent coating; 4-a transparent protective layer; 5-phosphor powder light conversion-light diffusion mixed coating; 6-light diffusion coating; 7-blank area; 8-quantum dot light conversion coating; 9-phosphor light conversion coating.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.
Furthermore, the terms "first" and "second" are used merely to simplify the description and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the first feature being "on" or "under" the first feature may comprise the first feature being in direct contact with the second feature or the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In order to solve the problem that the cost of a blue light LED backlight source is high due to the fact that the price of a light conversion substance is high at present, the invention provides a diffusion plate, which is shown in figure 1 and comprises a glass substrate 1 and a light conversion-light diffusion mixed coating arranged on the glass substrate 1; wherein the light conversion-light diffusion mixed coating comprises a light conversion substance and a light diffusion substance which are uniformly mixed.
The light conversion substance in the light conversion-light diffusion mixed coating is used for absorbing a certain proportion of blue light and emitting red light and green light; the light diffusion substance is used for reflecting and refracting light; according to the diffusion plate provided by the application, the light conversion substance and the light diffusion substance are mixed in the same coating, and in the backlight module, when light passes through the diffusion plate, the light meets the light conversion substance and is converted, so that converted light is obtained; when encountering light diffusion substances in the process of converting light transmission, the light is reflected or refracted to change the transmission direction; changing the transmission direction of the converted light, performing light conversion again after encountering a light conversion substance, and repeating the process; because the light conversion-light diffusion ink coating contains the light conversion substance and the light diffusion substance which are mixed with each other, light can be subjected to light conversion for many times when passing through the light conversion-light diffusion mixed coating, so that the utilization rate of the light conversion substance is improved, the light conversion efficiency is improved, the using amount of the light conversion substance is reduced, and the cost is saved.
The conventional diffuser, as shown in fig. 2, generally includes a glass substrate 1, a light diffusion coating 6, and a light conversion coating, which are sequentially disposed, that is, the light diffusion process and the light conversion process are both performed in the separately disposed coatings; after the light is diffused by the light diffusion coating 6, performing light conversion in the light conversion coating to obtain converted light; because the light conversion coating only comprises the light conversion substance, after light passes through the light conversion substance, the transmission direction can not be changed, and the converted light is directly emitted from the light emitting surface, so that the light can not be subjected to multiple light conversion, the utilization rate of the light conversion substance is low, and the light conversion efficiency is low.
According to the diffusion plate provided by the invention, the light conversion-light diffusion mixed coating containing the light conversion substance and the light diffusion substance is arranged, so that light can be reflected and refracted for multiple times when passing through the diffusion plate, and light conversion is carried out through the light conversion substance for multiple times, so that the utilization rate of the light conversion substance is improved, and the light conversion efficiency is improved; compared with the existing diffusion plate with the light diffusion coating and the light conversion coating which are independently arranged, the diffusion plate achieves the same optical effect, and the amount of light conversion substances needed by the diffusion plate provided by the invention is less, so that the reduction of the amount of the light conversion substances is facilitated, and the cost of a blue light LED backlight source is reduced.
The light diffusion substance can be selected from particles with light diffusion function, and the light diffusion substance is preferably selected from silicon oxide and titanium oxide mixture as the main component; the light conversion substance in the application can be a quantum dot material and can also be a fluorescent powder material. The addition amount of the light conversion substance and the light diffusion substance in the light conversion-light diffusion mixed coating is determined according to the requirement.
When the light conversion substance is a quantum dot material, the light conversion-light diffusion hybrid coating in the present application includes a quantum dot light conversion-light diffusion hybrid coating 2.
Because the quantum dot material has narrow light-emitting spectrum, when the light conversion substance adopts the quantum dot material, the color gamut of the picture is promoted, the display color is richer, and the visual effect is better.
The main component of the quantum dot material in the quantum dot light conversion-light diffusion mixed coating 2 is cadmium selenide.
The thickness of the quantum dot light conversion-light diffusion mixed coating 2 is preferably in the range of 20 μm to 100 μm.
In order to prevent edge failure, referring to fig. 3, the present application preferably provides the edge of the quantum dot photoconversion-photodiffusion hybrid coating 2 and the glass substrate 1 with a blank region 7, and preferably the blank region 7 has a width of 0.5 mm.
Because the quantum dot material is not high-temperature resistant, the diffusion ink used in the quantum dot light conversion-light diffusion mixed coating 2 is preferably low-temperature curing ink or ultraviolet curing ink with the curing temperature not higher than 110 ℃; the adhesion between the low-temperature curing ink or the ultraviolet curing ink and the glass substrate 1 is poor, so that the bonding force between the quantum dot light conversion-light diffusion mixed coating 2 and the glass substrate 1 is poor; in order to improve the adhesion between the quantum dot light conversion-light diffusion mixed coating 2 and the glass substrate 1, a transparent coating 3 is preferably arranged between the quantum dot light conversion-light diffusion mixed coating 2 of the glass substrate 1; the transparent coating 3 is a high-temperature curing ink layer; specifically, the transparent coating 3 preferably uses an acrylic resin mixture with a curing temperature of not lower than 180 ℃ so as to improve the adhesion between the quantum dot light conversion-light diffusion coating 2 and the glass substrate 1.
In order to take mechanical properties and optical properties of the diffusion plate into consideration, the thickness of the transparent coating 3 is preferably 10-15 μm; the light transmittance of the transparent coating 3 is more than 96 percent; the haze of the clear coat layer 3 was 0.
Furthermore, in order to avoid the accelerated failure of the quantum dot material after contacting with water and oxygen and influence the service life of the diffusion plate, the transparent protective layer 4 is preferably arranged on the outer side of the quantum dot light conversion-light diffusion mixed coating 2; the light transmittance of the transparent protective layer 4 is more than 90%; the haze of the transparent protective layer 4 was 0.
The transparent protective layer 4 is arranged to avoid the contact between the quantum dot material and water oxygen, so that the optical effect of the diffusion plate is guaranteed, and the service life of the diffusion plate is prolonged.
Specifically, the transparent protective layer 4 in the present application may be a full-lamination protective film, or may be a coating protective coating; the fully-laminated protective film can be a transparent PE film with back adhesive, and when the backlight structure requires that the optical film and the diffusion plate are fully laminated, the optical film can be directly used for replacing the PE film as the protective layer, so that the material and the process cost are saved; the main material of the protective coating is silicon nitride, and the coating mode can be selected from processes such as spray coating, screen printing, magnetron sputtering and the like.
In addition, in order to improve the protection effect, the transparent protective coating 4 preferably covers the whole quantum dot light conversion-light diffusion mixed coating 2 and also needs to cover the blank area 7 so as to isolate the edge of the quantum dot light conversion-light diffusion mixed coating 2 from being in contact with water and oxygen and completely isolate the water and oxygen.
When the light conversion substance is a phosphor material, the light conversion-light diffusion mixed coating in the present application is a phosphor light conversion-light diffusion mixed coating 5, as shown in fig. 4.
The light conversion substance is made of fluorescent powder material, which is helpful for improving the brightness of the backlight source. The preferred phosphor material of the present application has cerium doped yttrium aluminate as the major component.
The thickness of the phosphor light conversion-light diffusion mixed coating 5 is preferably in the range of 20 μm to 100 μm.
Because the fluorescent powder material has the characteristic of high temperature resistance, the diffusion ink in the fluorescent powder light conversion-light diffusion mixed coating 5 can be high-temperature curing ink, a transparent coating 3 does not need to be arranged between the fluorescent powder light conversion-light diffusion mixed coating 5 and the glass substrate 1, the fluorescent powder material has stable property, a transparent protective layer 6 does not need to be arranged on the outer side of the fluorescent powder light conversion-light diffusion mixed coating 5, and the diffusion plate is simple in structure and low in cost.
In order to optimize the optical performance of the diffusion plate, the haze range of the diffusion plate is 70% -100%, and the light transmittance range of the diffusion plate is 40% -70% through optimized combination of the structures in the diffusion plate.
Another object of the present invention is to provide a method for manufacturing a diffuser plate as described above, including the steps of:
s1: adding the light diffusion substance into the printing ink, and uniformly mixing to obtain the light diffusion printing ink;
s2: dissolving a light conversion substance in an organic solvent, and uniformly mixing to obtain a light conversion solution;
s3: adding the light conversion solution into the light diffusion printing ink to obtain light conversion-light diffusion mixed printing ink;
s4: uniformly coating the mixed ink of light conversion and light diffusion on the glass substrate 1 to obtain a diffusion plate; wherein the number of coating is two, and the feeding direction in the second coating process is opposite to the feeding direction in the first coating process.
The application prefers that the coating mode of the light conversion-light diffusion mixed ink is screen printing; and furthermore, the number of screen printing in the step is preferably two, and the feeding direction in the second printing process is rotated by 180 degrees compared with that in the first printing process, so that the thickness of the film layer in each area is consistent during printing, and the brightness uniformity and the optical quality of the light conversion-light diffusion mixed coating are improved.
When the light conversion substance is made of quantum dot materials, the diffusion plate is manufactured as follows:
s1: adding the photodiffusion substance into the low-temperature curing or ultraviolet curing ink, and uniformly mixing to obtain photodiffusion ink;
s2: dissolving the quantum dot material in an organic solvent diethylene glycol butyl ether, and uniformly mixing to obtain a quantum dot light conversion solution;
s3: adding the quantum dot light conversion solution into the light diffusion printing ink to obtain quantum dot light conversion-light diffusion mixed printing ink;
s4: printing a transparent coating 3 on the surface of the glass substrate 1;
s5: uniformly coating the quantum dot light conversion-light diffusion mixed ink on a transparent coating 3 to obtain a quantum dot light conversion-light diffusion mixed coating 2;
s6: and manufacturing a transparent protective layer 4 on the quantum dot light conversion-light diffusion mixed coating 2.
The coating process of the transparent protective layer 4 can be selected from printing, spraying, magnetron sputtering and the like, and preferably all the coating processes in the step adopt double-layer coating, and the feeding direction in the second coating process is rotated by 180 degrees compared with the first coating process, so that the thickness of the coating in each area is consistent during coating, and the brightness uniformity and the optical quality of the transparent protective layer 4 are improved.
When the light conversion substance is made of fluorescent powder material, the manufacturing process of the diffusion plate is as follows:
s1: adding the light diffusion substance into the high-temperature curing ink, and uniformly mixing to obtain light diffusion ink;
s2: dissolving a fluorescent powder material in an organic solvent diethylene glycol butyl ether, and uniformly mixing to obtain a fluorescent powder light conversion solution;
s3: adding the fluorescent powder light conversion solution into the light diffusion printing ink to obtain fluorescent powder light conversion-light diffusion mixed printing ink;
s4: and uniformly coating the fluorescent powder light conversion-light diffusion mixed ink on the glass substrate 1 to obtain the fluorescent powder light conversion-light diffusion mixed coating 5.
The manufacturing method of the diffusion plate provided by the invention has the advantages that the process is simple, and the manufactured diffusion plate is provided with the light conversion-light diffusion mixed coating which simultaneously contains the light conversion substance and the light diffusion substance, so that light can be reflected and refracted for many times when passing through the diffusion plate, and light conversion is carried out through the light conversion substance for many times, so that the utilization rate of the light conversion substance is improved, and the light conversion efficiency is improved; compared with the existing diffusion plate with the light diffusion coating and the light conversion coating which are independently arranged, the diffusion plate achieves the same optical effect, and the amount of light conversion substances needed by the diffusion plate provided by the invention is less, so that the reduction of the amount of the light conversion substances is facilitated, and the cost of a blue light LED backlight source is reduced.
For the convenience of understanding, the diffusion plate provided by the present invention is described in the present application by way of specific examples and comparative examples.
Example 1
Referring to fig. 1, common float glass with a thickness of 1.1mm is selected as a glass substrate 1, a transparent coating 3 with a thickness of 10 μm is coated on a light-emitting surface of the glass substrate 1, and then a quantum dot light conversion-light diffusion mixed coating 2 with a thickness of 50 μm is coated on the surface of the transparent coating 3, wherein the total solid content of a quantum dot material is controlled to be 5 per thousand; then a gum PE film is fully attached to the surface of the quantum dot light conversion-light diffusion mixed coating 2 to serve as a transparent protective layer 4, and the total thickness of the film material is 100 micrometers; the blue light LED backlight module is matched.
Comparative examples 1 to 1
Referring to fig. 6, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a light diffusion coating 6 with a thickness of 50 μm is coated on a light-emitting surface of the glass substrate 1, and then a quantum dot light conversion coating 8 with a thickness of 10 μm is coated on the surface of the light diffusion coating 6, wherein the dosage of a quantum dot material is controlled to be 5 ‰ as same as that of the embodiment 1; then a back adhesive PE film is fully attached to the surface of the quantum dot light conversion coating 8 to serve as a transparent protective layer 4, and the total thickness of the film material is 100 micrometers; the blue light LED backlight module is matched.
Comparative examples 1 to 2
Referring to fig. 6, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a light diffusion coating 6 with a thickness of 50 μm is coated on a light-emitting surface of the glass substrate 1, and then a quantum dot light conversion coating 8 with a thickness of 10 μm is coated on the surface of the light diffusion coating 6, wherein the dosage of a quantum dot material is controlled to be increased by 3 times and 15 per thousand compared with that of the embodiment 1; then a back adhesive PE film is fully attached to the surface of the quantum dot light conversion coating 8 to serve as a transparent protective layer 4, and the total thickness of the film material is 100 micrometers; the blue light LED backlight module is matched.
Comparative examples 1 to 3
Referring to fig. 5, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a light diffusion coating 6 with a thickness of 50 μm is coated on a light-emitting surface of the glass substrate 1 to form an ordinary glass diffusion plate, and a white light LED backlight module is matched with the ordinary glass diffusion plate, wherein the white light LED is formed by coating fluorescent powder on the surface of a blue light LED lamp, and the power of original blue light LED is the same as that of the bead arrangement of the blue light LED backlight module.
The same blue light LED backlight module is used for assembly measurement, the color coordinates, the brightness and the color gamut of four glass diffusion plates of the embodiment 1, the comparative examples 1-1 and the comparative examples 1-2 are measured, the white light LED backlight module is used for measuring the color coordinates, the brightness and the color gamut of four glass diffusion plates of the comparative examples 1-3, and meanwhile, the comparison result with the color coordinates of a quantum dot film commonly used on the market is as follows:
comparison of diffuser plate optical Properties
| CIE-x | CIE-y | Light color | Brightness of light | Color gamut | |
| Example 1 | 0.2763 | 0.2658 | White light | 6538 | 99.4 |
| Comparative examples 1 to 1 | 0.2210 | 0.2042 | Blue light | / | / |
| Comparative examples 1 to 2 | 0.2749 | 0.2683 | White light | 6498 | 99.2 |
| Quantum dot film | 0.2779 | 0.2652 | White light | 6047 | 100.1 |
| Comparative examples 1 to 3 | 0.2790 | 0.2685 | White light | 6676 | 71.5 |
From the above results, in example 1, compared with comparative example 1-1, the content of the added quantum dots is the same, but the color coordinate of example 1 is basically the same as that of the quantum dot film and the white LED diffusion plate, the color coordinate of comparative example 1-1 is obviously lower, the light is blue, the blue light conversion rate is low, and the backlight requirement is not satisfied; the light rays of the comparative examples 1-2 and the example 1 are white light, and the color coordinates of the two are basically consistent, so that the backlight requirement is met, but the content of the quantum dots in the comparative examples 1-2 is 3 times of that in the example 1, so that the material waste is caused; the process method in the embodiment 1 has less usage amount, can achieve the same light conversion effect as the quantum dot film and the white light LED diffusion plate, and has a certain shielding property because the quantum dot film has a certain shielding property, so that the brightness of the diffusion plate is reduced by 8 percent compared with that of the diffusion plate in the embodiment 1; in comparison with comparative examples 1-3, the color gamut of the diffuser plate is improved by 28%, and because the transparent coating layer 3 and the transparent protective layer 4 in the quantum dot diffuser plate are both high-light-transmission materials, the overall brightness of the diffuser plate is smaller than that of a white diffuser plate, and only 2% of the difference is obtained.
Example 2
Referring to fig. 4, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a fluorescent powder light conversion-light diffusion mixed coating 5 with a thickness of 50 μm is coated on a light-emitting surface of the glass substrate 1, and the total solid content of fluorescent powder is controlled at 8%; the blue light LED backlight module is matched.
Comparative example 2-1
Referring to fig. 2, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a light-emitting surface of the glass substrate 1 is coated with a light-diffusing coating 6 with a thickness of 50 μm, and then the surface of the light-diffusing coating 6 is coated with a fluorescent powder light conversion coating 9 with a thickness of 20 μm; the amount of the phosphor powder used was controlled to be 8% as in example 2; the blue light LED backlight module is matched.
Comparative examples 2 to 2
Referring to fig. 2, ordinary float glass with a thickness of 1.1mm is selected as a glass substrate 1, a light-emitting surface of the glass substrate 1 is coated with a light-diffusing coating 6 with a thickness of 50 μm, and then the surface of the light-diffusing coating 6 is coated with a fluorescent powder light conversion coating 9 with a thickness of 20 μm; compared with the embodiment 2, the use amount of the fluorescent powder is controlled to be increased by 3 times and is 24 percent; the blue light LED backlight module is matched.
Comparative examples 2 to 3
Selecting common float glass with the thickness of 1.1mm as a glass substrate 1, and coating a light diffusion coating 6 with the thickness of 50 mu m on the light emergent surface of the glass substrate 1 to prepare a common glass diffusion plate; the white light LED backlight module is matched, the white light LED is made by coating fluorescent powder on the surface of a blue light LED lamp, and the power and the bead arrangement of the original blue light LED are the same as those of the blue light LED backlight module.
The same blue light LED backlight module is used for assembly measurement, the color coordinates, the brightness and the color gamut of four diffusion plates of example 2, comparative example 2-1 and comparative example 2-2 and the comparative example 2-3 are measured, and the comparison results are as follows:
comparison of diffuser plate optical Properties
| CIE-x | CIE-y | Light color | Brightness of light | Color gamut | |
| Example 2 | 0.2794 | 0.2704 | White light | 8056 | 71.4 |
| Comparative example 2-1 | 0.2089 | 0.2011 | Blue light | / | / |
| Comparative examples 2 to 2 | 0.2805 | 0.2712 | White light | 7995 | 70.9 |
| Comparative examples 2 to 3 | 0.2790 | 0.2685 | White light | 6676 | 71.5 |
Compared with the comparative example 2-1, the content of the added fluorescent powder is the same, but the color coordinate of the example 2 is basically the same as that of the white light LED diffusion plate, the color coordinate of the comparative example 2-1 is obviously lower, the light is blue, the blue light conversion rate is low, and the backlight requirement is not met; the color coordinates of the comparative examples 2-2 are basically consistent with those of the example 2, the backlight requirement is met, but the content of the fluorescent powder in the comparative examples 2-2 is 3 times of that of the example 2, so that the material is wasted, the using amount of the fluorescent powder in the process method in the example 2 is small, and compared with the comparative examples 2-3, the brightness of the diffusion plate is improved by 20%, which shows that when the fluorescent powder material is far away from a light source, the light conversion efficiency can be completed, and the light efficiency can be greatly improved.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.
Claims (10)
1. A diffuser plate, comprising a glass substrate (1), and a light conversion-light diffusion hybrid coating disposed on the glass substrate (1);
the light conversion-light diffusion mixed coating comprises a light conversion substance and a light diffusion substance which are uniformly mixed.
2. A diffuser plate according to claim 1, wherein the photoconversion-photodiffusion hybrid coating comprises a quantum dot photoconversion-photodiffusion hybrid coating (2).
3. The diffuser plate according to claim 2, wherein the quantum dot light conversion-light diffusion hybrid coating layer (2) has a thickness ranging from 20 μm to 100 μm.
4. A diffuser plate according to claim 2, wherein a transparent coating (3) is provided between the glass substrate (1) and the quantum dot light conversion-light diffusion hybrid coating (2); the transparent coating (3) is a high-temperature curing ink layer.
5. A diffuser plate according to claim 4, wherein the thickness of the transparent coating layer (3) ranges from 10 μm to 15 μm; the light transmittance of the transparent coating (3) is more than 96 percent; the haze of the clear coat (3) is 0.
6. A diffuser plate according to claim 4, wherein the quantum dot light conversion-light diffusion hybrid coating (2) is further provided with a transparent protective layer (4) on the outside; the light transmittance of the transparent protective layer (4) is more than 90%; the haze of the transparent protective layer (4) is 0.
7. A diffuser plate according to claim 1, wherein said light conversion-light diffusion hybrid coating comprises a phosphor light conversion-light diffusion hybrid coating (5).
8. The diffuser plate according to claim 7, wherein the phosphor light conversion-light diffusion mixed coating layer (5) has a thickness ranging from 20 μm to 100 μm.
9. The diffuser plate according to any one of claims 1 to 8, wherein the haze of the diffuser plate ranges from 70% to 100%; the light transmittance of the diffusion plate ranges from 40% to 70%.
10. A method for manufacturing a diffuser plate according to any one of claims 1 to 9, comprising the steps of:
s1: adding the light diffusion substance into the printing ink, and uniformly mixing to obtain the light diffusion printing ink;
s2: dissolving a light conversion substance in an organic solvent, and uniformly mixing to obtain a light conversion solution;
s3: adding the light conversion solution into the light diffusion printing ink to obtain light conversion-light diffusion mixed printing ink;
s4: uniformly coating the light conversion-light diffusion mixed ink on a glass substrate (1) to obtain a diffusion plate; wherein the number of coating is two, and the feeding direction in the second coating process is opposite to the feeding direction in the first coating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110203180.3A CN112837612A (en) | 2021-02-23 | 2021-02-23 | Diffusion plate and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114740650A (en) * | 2022-04-20 | 2022-07-12 | 广州思而特科技有限公司 | Glass diffusion plate, manufacturing method of glass quantum dot diffusion plate and diffusion ink |
| CN116257022A (en) * | 2022-12-01 | 2023-06-13 | 南京贝迪新材料科技股份有限公司 | Intelligent control method and system for color gamut performance in quantum dot diffusion plate production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114740650A (en) * | 2022-04-20 | 2022-07-12 | 广州思而特科技有限公司 | Glass diffusion plate, manufacturing method of glass quantum dot diffusion plate and diffusion ink |
| CN114740650B (en) * | 2022-04-20 | 2024-01-12 | 广州思而特科技有限公司 | Glass diffusion plate, manufacturing method of glass quantum dot diffusion plate and diffusion ink |
| CN116257022A (en) * | 2022-12-01 | 2023-06-13 | 南京贝迪新材料科技股份有限公司 | Intelligent control method and system for color gamut performance in quantum dot diffusion plate production process |
| CN116257022B (en) * | 2022-12-01 | 2024-05-10 | 南京贝迪新材料科技股份有限公司 | Intelligent control method and system for color gamut performance in quantum dot diffusion plate production process |
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