阅读说明：本技术 一种自动控温的led显示屏、面罩及制作方法 (Automatic temperature control LED display screen, mask and manufacturing method ) 是由 陈粤佳 张奇 何昆鹏 吴涵渠 于 2020-11-20 设计创作，主要内容包括：本发明涉及一种自动控温的LED显示屏面罩及制作方法,自动控温的LED显示屏面罩制作方法包括：在二氧化钒粉体中加入钨掺杂源,掺杂后的相变材料相变温度为20～40℃；对加入了钨掺杂源的二氧化钒粉体进行球磨处理,球磨后的粉体粒径为50nm～50um；将所述相变材料在分散液中分散,制备自动控温涂料；采用刷涂、喷涂或溅射工艺将自动控温涂料附着到LED显示屏面罩外表面；将LED显示屏面罩外表面的自动控温涂料晾干,其中相变材料晾干后固化到面罩表面形成涂层,得到含有相变材料的自动控温的LED显示屏面罩。本发明在传统材料基础上添加了掺钨的二氧化钒相变复合材料,从而降低了LED显示屏使用过程中的屏面温度,增强了设备使用安全和增加了使用寿命。(The invention relates to an automatic temperature control LED display screen mask and a manufacturing method thereof, wherein the manufacturing method of the automatic temperature control LED display screen mask comprises the following steps: adding a tungsten doping source into the vanadium dioxide powder, wherein the phase change temperature of the doped phase change material is 20-40 ℃; carrying out ball milling treatment on the vanadium dioxide powder added with the tungsten doping source, wherein the particle size of the ball-milled powder is 50 nm-50 um; dispersing the phase-change material in dispersion liquid to prepare an automatic temperature control coating; adopting brushing, spraying or sputtering technology to attach the automatic temperature control coating to the outer surface of the LED display screen mask; and airing the automatic temperature control coating on the outer surface of the LED display screen mask, wherein the phase-change material is solidified on the surface of the mask after being aired to form a coating, and thus the automatic temperature control LED display screen mask containing the phase-change material is obtained. The tungsten-doped vanadium dioxide phase change composite material is added on the basis of the traditional material, so that the temperature of a screen surface of the LED display screen in the using process is reduced, the using safety of equipment is enhanced, and the service life is prolonged.)

1. A manufacturing method of an automatic temperature control LED display screen mask is characterized by comprising the following steps:

adding a tungsten doping source into vanadium dioxide powder, wherein the phase change temperature of the doped phase change material is 20-40 ℃;

step two, carrying out ball milling treatment on the vanadium dioxide powder added with the tungsten doping source, wherein the particle size of the ball-milled powder is 50 nm-50 um;

dispersing the phase-change material in dispersion liquid to prepare the automatic temperature control coating;

step four, adopting brushing, spraying or sputtering technology to attach the automatic temperature control coating to the outer surface of the LED display screen mask;

and fifthly, airing the automatic temperature control coating on the outer surface of the LED display screen mask, wherein the phase-change material is solidified on the surface of the mask to form a coating after being aired, and thus the automatic temperature control LED display screen mask containing the phase-change material is obtained.

2. The method for manufacturing the LED display screen mask with the automatic temperature control function according to claim 1, wherein a preparation method of vanadium dioxide is further included before the step of adding the tungsten doping source into the vanadium dioxide powder, and the preparation method of the vanadium dioxide includes a hydrothermal synthesis method, an oxygen reduction method, a sol-gel method, a thermal decomposition method or a chemical precipitation method.

3. The manufacturing method of the LED display screen mask with the automatic temperature control function according to claim 1, wherein the tungsten doping source comprises one or more of tungstic acid, sodium tungstate, tungsten hexachloride and other tungsten-containing compounds, and the mass ratio of the tungsten doping source to vanadium oxide in the vanadium dioxide is 1: 100-1: 10.

4. The manufacturing method of the LED display screen mask with the automatic temperature control function according to claim 1, wherein the dispersion liquid comprises methanol, N-methyl pyrrolidone, ethyl acetate or other resins, and the mass addition ratio of vanadium dioxide to the dispersion liquid ranges from 1:1000 to 1: 10.

5. The manufacturing method of the automatic temperature control LED display screen mask according to claim 1, wherein the air-drying temperature of the automatic temperature control coating on the outer surface of the LED display screen mask in air-drying is 20-50 ℃.

6. The utility model provides an automatic LED display screen face guard of accuse temperature installs on the LED display screen, for LED lamp pearl provides the protection, a serial communication port, includes:

the LED lamp comprises a mask substrate, a plurality of LED lamp beads and a plurality of LED lamp beads, wherein the mask substrate is provided with a plurality of lamp holes for the LED lamp beads to pass through and at least partially expose out of the mask substrate, the lamp holes are arranged on the mask substrate in an array manner, and the mask substrate further comprises a first end face and a second end face which are oppositely arranged;

the automatic temperature control coating layer comprises the automatic temperature control coating prepared by the manufacturing method of the automatic temperature control LED display screen mask according to any one of claims 1 to 5, and is arranged at any position of the outer surface of the mask.

7. The automatic temperature control LED display screen mask according to claim 6, further comprising a connecting device disposed on the first end surface of the mask substrate.

8. The automatic temperature control LED display screen mask according to claim 6, wherein the connecting means comprises mask teeth disposed on the first end surface of the mask base, the mask teeth and the lamp holes being arranged in an array at intervals.

9. The automatic temperature control LED display screen mask according to claim 6, wherein the automatic temperature control paint layer can be independently coated on any position of the mask teeth.

10. An LED display screen, characterized in that, includes fixed bolster, a plurality of display module assembly, a plurality of the display module assembly is fixed in on the fixed bolster, the LED display screen includes the LED display screen face guard of automatic temperature control of any of claims 6-9.

Technical Field

The invention belongs to the field of LED display, and particularly relates to an automatic temperature control LED display screen, a mask and a manufacturing method.

Background

Present LED display screen point interval is greater than 1 millimeter, and the lamp pearl can be salient on PCB board surface, for protecting the lamp pearl, makes LED lamp colour more even simultaneously, can install one deck black face guard additional usually between the lamp pearl clearance. The face shield is a shield of the LED display screen, and plays roles of dust prevention and ultraviolet prevention. However, the shield is also a thermal garment for the LED display screen, has strong absorption to solar infrared heat radiation, reduces the radiation capability of the lamp bead to the outside during working and heating, and improves the surface temperature of the LED display screen to a certain extent. The display screen high temperature easily leads to the heat dissipation part to suffer damage, reduces life, has certain conflagration hidden danger even.

Disclosure of Invention

The invention aims to provide an automatic temperature control LED display screen, a mask and a manufacturing method, so as to solve the technical problems.

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

the invention provides a method for manufacturing an automatic temperature control LED display screen mask, which comprises the following steps:

adding a tungsten doping source into vanadium dioxide powder, wherein the phase change temperature of the doped phase change material is 20-40 ℃;

step two, carrying out ball milling treatment on the vanadium dioxide powder added with the tungsten doping source, wherein the particle size of the ball-milled powder is 50 nm-50 um;

dispersing the phase-change material in dispersion liquid to prepare the automatic temperature control coating;

step four, adopting brushing, spraying or sputtering technology to attach the automatic temperature control coating to the outer surface of the LED display screen mask;

and fifthly, airing the automatic temperature control coating on the outer surface of the LED display screen mask, wherein the phase-change material is solidified on the surface of the mask to form a coating after being aired, and thus the automatic temperature control LED display screen mask containing the phase-change material is obtained.

Further, the method for preparing vanadium dioxide before the step of adding the tungsten doping source into the vanadium dioxide powder also comprises a method for preparing vanadium dioxide, wherein the method for preparing vanadium dioxide comprises a hydrothermal synthesis method, an oxygen reduction method, a sol-gel method, a thermal decomposition method or a chemical precipitation method.

Further, the tungsten doping source comprises one or more of tungstic acid, sodium tungstate, tungsten hexachloride and other tungsten-containing compounds, wherein the mass ratio of the tungsten doping source to the vanadium oxide in the vanadium dioxide is 1: 100-1: 10.

Further, the dispersion liquid comprises methanol, N-methyl pyrrolidone, ethyl acetate or other resins, wherein the mass addition ratio of the vanadium dioxide to the dispersion liquid ranges from 1:1000 to 1: 10.

Further, the drying temperature of the automatic temperature control coating on the outer surface of the face mask of the LED display screen in the drying process is 20-50 ℃.

The invention also provides an automatic temperature control LED display screen mask which is arranged on an LED display screen and provides protection for LED lamp beads, and the automatic temperature control LED display screen mask comprises:

the LED lamp comprises a mask substrate, a plurality of LED lamp beads and a plurality of LED lamp beads, wherein the mask substrate is provided with a plurality of lamp holes for the LED lamp beads to pass through and at least partially expose out of the mask substrate, the lamp holes are arranged on the mask substrate in an array manner, and the mask substrate further comprises a first end face and a second end face which are oppositely arranged;

the automatic temperature control coating layer comprises the automatic temperature control coating prepared by the manufacturing method of the automatic temperature control LED display screen mask, and the automatic temperature control coating is arranged at any position of the outer surface of the mask.

Further, the automatic temperature control LED display screen mask further comprises a connecting device arranged on the first end face of the mask substrate.

Furthermore, the connecting device comprises mask teeth, the mask teeth are arranged on the first end face of the mask substrate, and the mask teeth and the lamp holes are arranged in an array mode at intervals.

Further, the automatic temperature control coating layer can be independently coated on any position of the teeth of the face mask.

The invention also provides an LED display screen which comprises a fixing support and a plurality of display modules, wherein the display modules are fixed on the fixing support, and the LED display screen comprises the LED display screen mask capable of automatically controlling the temperature.

The automatic temperature control's of this application LED display screen veil material has added the vanadium dioxide phase transition combined material who mixes tungsten on traditional material basis, and the automatic temperature control dope layer can set up in arbitrary position of face guard, and this functional material has automatic temperature control's beneficial effect, after the lamp plate operating temperature rose to the phase transition temperature of vanadium dioxide, the LED face guard had the ability of reflection infrared ray, can reflect the infrared ray that solar radiation came over, and can increase the radiance of the heat of LED display screen self to the external environment. Therefore, the temperature of the screen surface of the LED display screen in the using process is reduced, the using safety of the equipment is enhanced, and the service life is prolonged.

Drawings

FIG. 1 is a flow chart of a method for manufacturing a mask of an LED display screen with automatic temperature control according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an LED display screen with automatic temperature control according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an LED display screen with automatic temperature control according to another embodiment of the present invention;

FIG. 4 is a schematic view of a tooth mask of an automatic temperature control LED display screen according to another embodiment of the present invention;

FIG. 5 is a schematic view of a tooth mask of an automatic temperature control LED display screen according to another embodiment of the present invention;

FIG. 6 is a schematic view of a tooth mask of an automatic temperature control LED display screen according to another embodiment of the present invention.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Vanadium dioxide (VO)₂) The vanadium dioxide is a metal oxide with phase change property, the phase change temperature is 68 ℃, the visible light transmittance of the vanadium dioxide is not greatly changed before and after phase change, the infrared light change is obvious, and when the vanadium dioxide is used as a functional pigment and added into a transparent coating after modification and volume increase, the coating with the phase change function can be obtained. The coating has very high transmittance in both visible light and infrared light regions under the condition that the external temperature is lower than the phase transition temperature. When the external temperature is higher than the phase transition temperature, the transmittance in the visible light region does not change much, while the transmittance in the infrared light region is severely reduced. Vanadium dioxide can be doped with W⁶⁺、Mo⁶⁺、Nb⁵⁺The metal cations can reduce the phase transition temperature of the vanadium dioxide powder, and the phase transition temperature can be reduced to below 40 ℃ or even reach room temperature. The infrared light transmittance is greatly different from room temperature, and when the functional coating is coated on the surface of the LED display screen, the controllable adjustment of the temperature to the light can be realized without adding any external energy. Referring to fig. 1, fig. 1 is a flowchart of a method for manufacturing an automatic temperature control LED display screen mask according to an embodiment of the present invention; the manufacturing method of the LED display screen mask with automatic temperature control comprises the following steps:

step S110, adding a tungsten doping source into vanadium dioxide powder, wherein the wanted temperature of the doped phase-change material is 20-40 ℃;

the traditional LED display screen mask material is a PC material, a toner and light diffusion powder, the LED display screen mask material of the embodiment is added with a tungsten-doped vanadium dioxide phase change composite material (WVO) on the basis of the traditional material, a tungsten doping source can be but is not limited to one or more of tungsten-containing compounds such as tungstic acid, sodium tungstate, tungsten hexachloride and the like, wherein in an optional embodiment, the mass ratio range of tungsten to vanadium oxide is 1: 100-1: 10;

step S120, carrying out ball milling treatment on the vanadium dioxide powder added with the tungsten doping source, wherein the particle size of the ball-milled powder is 50 nm-50 um;

step S130, dissolving the phase change material in the dispersion liquid to prepare the automatic temperature control coating; the dispersion liquid can be methanol, N-methyl pyrrolidone, ethyl acetate or other resins, and the mass ratio of the phase-change material to the dispersion liquid is 1: 1000-1: 10;

step S140, attaching the automatic temperature control coating to the outer surface of the LED display screen mask by using, but not limited to, brushing, spraying or sputtering;

s150, airing the automatic temperature control coating on the outer surface of the LED display screen mask, wherein the phase-change material is solidified on the surface of the mask to form a coating after being aired, so that the automatic temperature control LED display screen mask containing the phase-change material is obtained; wherein the airing temperature is 20-50 ℃.

The LED display screen mask capable of automatically controlling the temperature can realize the controllable adjustment of the temperature to the light without adding any external energy.

Referring to fig. 2, fig. 2 is a view of an LED display screen mask 1 with automatic temperature control according to an embodiment of the present invention, installed on an LED display screen to provide protection for an LED lamp bead, including: the LED lamp comprises a mask substrate 3, wherein a plurality of lamp holes 5 are formed in the mask substrate 3, LED lamp beads can penetrate through the lamp holes and are at least partially exposed out of the mask substrate 3, the lamp holes 5 are arranged on the mask substrate 3 in an array manner, and the mask substrate 3 further comprises a first end face and a second end face which are oppositely arranged; the automatic temperature control coating layer 2 is composed of the automatic temperature control coating in the embodiment and is arranged on the second end face of the face mask 3. In some alternative embodiments, the mask substrate 3 is made of a phase-change material in addition to the conventional materials, and the mask substrate itself has the function of automatic temperature control without separately providing automatic temperature control coating layers on different end surfaces of the mask substrate.

The mask 1 further includes attachment means comprising a layer of glue 4 disposed on a first end face of the mask base 3, and further includes, but is not limited to, mask teeth 7 in fig. 3 or glue layer 4 and mask teeth 7 in fig. 3-6.

Referring to fig. 3, fig. 3 is a schematic view of another automatic temperature control LED display screen mask 6 according to the present invention, which includes a mask substrate 3, a plurality of lamp holes 5 disposed on the mask substrate for LED lamp beads to pass through and at least partially expose to the mask substrate 3, the plurality of lamp holes 5 are arranged in an array on the mask substrate 3, and the mask substrate 3 includes a first end surface and a second end surface disposed opposite to each other; the glue layer 4 is arranged on the first end face of the mask substrate 3, and the automatic temperature control coating layer 2 is arranged on the second end face of the mask substrate 3; the mask 6 further comprises mask teeth 7 disposed on a first end face of the mask base 3.

Referring to fig. 4, in other alternative embodiments, the automatic temperature control coating layer 2 may also be disposed on the first end surface of the mask substrate 3, wherein the automatic temperature control coating layer 2 is disposed between the mask substrate 3 and the glue layer 4; referring to fig. 5, in some alternative embodiments, the automatic temperature control paint layer 2 may also be separately disposed on the end of the mask teeth 7 away from the mask substrate 3, and directly contact with the PCB; referring to fig. 6, in other alternative embodiments, the automatic temperature control paint layer 2 can also be coated to wrap the mask teeth 7.

In other optional embodiments, the invention further provides an LED display screen, which includes a fixing bracket and a plurality of display modules, wherein the plurality of display modules are fixed on the fixing bracket, and the LED display screen is provided with any one of the above LED display screen masks with automatic temperature control.

The traditional LED display screen mask material is PC material, toner and light diffusion powder. The automatic temperature control LED display screen mask material adds the vanadium dioxide phase change composite material doped with tungsten on the basis of the traditional material, and the automatic temperature control coating layer can be arranged at any position of the mask, can improve heat reflection after the LED working temperature reaches the phase change temperature, and has the beneficial effect of automatic temperature control, thereby reducing the screen temperature in the use process of the LED display screen, enhancing the use safety of equipment and prolonging the service life.

The invention is not the best known technology.

In the several embodiments provided in the present invention, it should be understood that the disclosed method may be implemented in other ways. For example, the above-described embodiments are merely illustrative, and for example, the division of the components is only one logical functional division, and other divisions may be realized in practice.

It will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention are capable of being embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.