WO2018000698A1 - Quantum dot light bar production method and production system - Google Patents

Abstract

Provided are a quantum dot light bar production method and production system. The method comprises the following steps of: providing a quantum dot colloid material and a glass tube (40), the glass tube (40) comprising an open end and a closed end; placing the open end of the glass tube (40) downwardly to put the quantum dot colloid material into the glass tube (40) from the open end (S10); filling the glass tube (40) with protective gas to form a gas plug (S20); making the glass tube (40) be subjected to a heat treatment in the atmosphere of the protective gas (S30); heating the open end of the glass tube (40) until it is melted and sintered (S40); and making the glass tube (40) be subjected to an annealing treatment in the atmosphere of the protective gas (S50).

Description

Production method and production system of quantum dot light strip

[Technical Field]

The invention relates to the technical field of quantum dot light strips, in particular to a method and a production system for producing quantum dot light strips.

【Background technique】

A quantum dot is a series of nanoparticles having fluorescence, which is usually a material having a crystal structure in the range of 1 to 20 nm. Quantum dots have dimensionally tunable optical properties, high quantum efficiency, relatively narrow half-width and resistance to photodegradation. As a new generation of luminescent materials, quantum dots are being used in LED displays.

The photoelectric characteristics of quantum dot tubes are unique. They are stimulated by electricity or light, and emit very pure high-quality monochromatic light of various colors according to the diameter of quantum dots. The main principle of applying quantum dots to display technology is to emit quantum dot crystals of different sizes in quantum dot tubes through pure blue light sources, thereby releasing pure red photons and pure green photons, and projecting the remaining pure blue light into the imaging system. In the above, it is possible to emit high-quality red/green monochromatic light with concentrated spectrum and very pure color by means of quantum dots, completely surpassing the fluorescent light-emitting characteristics of the conventional LED backlight to achieve better imaging color.

However, the quantum dot colloidal material in the quantum dot tube is very special and easily reacts with oxygen and water in the air, so it must be placed in a closed space of anaerobic and water-tight, which forms a difficulty, how to quantum The puncture material is potted into a closed glass tube, and there is no water and air in the glass tube, which is a technical problem to be solved currently.

[Summary of the Invention]

Based on this, it is necessary to provide a method and a production system for a quantum dot strip that can encapsulate quantum dots into a glass tube and prevent air from entering the glass tube.

A method for producing a quantum dot strip includes:

Providing a quantum dot colloid material and a glass tube, the glass tube comprising an open end and a closed end, the open end of the glass tube is facing downward, and the quantum dot colloid material is loaded from the open end under vacuum In the glass tube;

Filling the glass tube with a shielding gas to form a gas plug;

Heating the glass tube and the quantum dot colloidal material under an atmosphere of a shielding gas;

Heating and sintering the open end of the glass tube; and

The glass tube is annealed in an atmosphere of a shielding gas.

A quantum dot light strip production system comprising:

a filling mechanism for loading a glass tube with a quantum dot colloidal material and filling the glass tube with a protective gas to form a gas plug; the filling mechanism includes a filling tank, a liquid supply tank, and a filling mechanism a vacuum pump, a second vacuum pump, a first protective gas tank and a second protective gas tank; the filling tank comprising a tank body and a sealing block, the tank body having an opening, the sealing block being located at an opening of the tank body And a first perforation, the first perforation being concentric with the opening, the filling tank being in communication with the first protective gas tank and the first vacuum pump; the liquid supply tank and the filling tank Connected by a pipe, the pipe is provided with a liquid supply valve, and the liquid supply tank is in communication with the second protective gas tank and the second vacuum pump;

a baking mechanism for heating the glass tube and the quantum dot colloidal material under a protective gas atmosphere; the baking mechanism comprises a vacuum box, an infrared heating furnace, and a fourth protection a gas tank and a third vacuum pump, the vacuum box is located in the infrared heating furnace and is in communication with the third vacuum pump, wherein the vacuum box is provided with a plurality of gas tubes, the gas tubes and the fourth protective gas tank Connected

a sealing mechanism for heating and melting the open end of the glass tube and annealing the glass tube under a protective gas atmosphere; the sealing mechanism comprises a fixing frame, a first heating source, and an annealing a chamber, a fourth vacuum pump, a third shielding gas tank, and a second heating source, the first heating source being disposed under the fixing frame; the second heating source being disposed in the annealing chamber, the third Both the protective gas cylinder and the fourth vacuum pump are in communication with the annealing chamber.

A method for producing a quantum dot strip includes:

Providing a quantum dot colloid material and a glass tube, the glass tube comprising an open end and a closed end, the open end of the glass tube is facing downward, and the open end is extended from the sealing block into the filling tank to open the first The vacuum pump vacuums the filling tank, opens the second vacuum pump to evacuate the liquid supply tank, then opens the second protective gas tank to fill the liquid supply tank with nitrogen gas, and then opens the liquid supply valve, and the liquid supply tank injects into the filling tank Quantum dot colloidal material, when the liquid level of the quantum dot colloidal material in the filling tank is higher than the open end of the glass tube, the quantum dot colloid material is filled into the glass tube by the open end of the glass tube, and the quantum dot colloid material is filled with the glass tube and then opened. The first protective gas tank is filled with nitrogen gas into the filling tank, and the nitrogen gas enters the glass tube to form a nitrogen plug in the glass tube;

The glass tube with the quantum dot colloidal material is placed in a vacuum box, the vacuum box is evacuated by a third vacuum pump, and then the protective gas is filled in the inflation tube of the vacuum box through the fourth protective gas tank, and then the infrared heating furnace is used. The glass tube is subjected to heat treatment;

Removing the glass tube from the vacuum box and placing it on a fixing frame, and heating and melting the open end of the glass tube by a first heating source;

The glass tube is placed in an annealing chamber having a second heating source, and the fourth vacuum pump evacuates the annealing chamber, and then the protective gas is filled in the annealing chamber through the third protective gas tank, and the glass tube is annealed. That is, the quantum dot light strip is obtained.

In the above method for producing a quantum dot light strip, after the glass tube is filled with a protective gas to form another plug, heat treatment is performed under a protective gas atmosphere, and then the open end of the glass tube is heated and melted and sealed for sealing, and is carried out under a protective gas atmosphere. Annealing, no oxidation during the process, and no air or moisture. The production system of the above quantum dot light strip comprises a filling mechanism, a baking mechanism, a sealing mechanism, etc., and vacuums and a protective gas are introduced in the filling tank, the liquid supply tank, the vacuum box and the annealing chamber to ensure the quantum dots. The light strip does not enter the air during the production process, avoiding the oxidation reaction of the quantum dot strip.

[Description of the Drawings]

1 is a process flow diagram of a method of producing a quantum dot strip of an embodiment;

2 is a schematic structural view of a production system of a quantum dot strip according to an embodiment;

3 is a schematic structural view of a filling mechanism of the production system of the quantum dot light strip shown in FIG. 2;

Figure 4 is a schematic view showing the structure of the filling tank of the filling mechanism shown in Figure 3;

5 is a schematic structural view of a baking mechanism of the production system of the quantum dot strip of FIG. 2;

6 is a schematic structural view of a conveyor belt, a fixing frame, and a first heating source in a sealing mechanism of the production system of the quantum dot light strip of FIG. 2;

7 is a schematic view showing the structure of an annealing chamber in a sealing mechanism of the production system of the quantum dot strip of FIG. 2.

 【detailed description】

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the understanding of the present disclosure will be more fully understood.

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, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

Referring to FIG. 1, a method for producing a quantum dot strip of an embodiment includes:

Step S10, providing a quantum dot colloid material and a glass tube. The glass tube comprises an open end and a closed end. The open end of the glass tube is facing downward, and the quantum dot colloid material is loaded into the glass tube from the open end under vacuum.

Step S20: filling a glass tube with a shielding gas to form a gas plug.

In one embodiment, the shielding gas is specifically nitrogen. It is believed that other inert gases may also be used as shielding gas for forming gas plugs. The atmosphere of the shielding gas has a gas pressure of 0.7 to 1.0 atm.

Step S30: heat treatment of the glass tube and the quantum dot colloidal material under a protective gas atmosphere.

In one embodiment, the glass tube and the quantum dot colloid material are heated by an infrared heating furnace, and the heating temperature is 150 ° C to 200 ° C, and the heating time is 2 min to 30 min.

Step S40: heating and sintering the open end of the glass tube.

In one embodiment, the open end of the glass tube is heated and melted and sintered in a hydrogen-oxygen generator at a heating temperature of 1900 ° C to 2000 ° C and a heating time of 0.5 min to 10 min.

Step S50: annealing the glass tube under an atmosphere of a shielding gas.

In one embodiment, the shielding gas is nitrogen and the atmosphere of the shielding gas has a gas pressure of 0.7 to 1.0 atmospheres. The temperature at which the glass tube is annealed is 80 ° C to 90 ° C, and the annealing time is 0.5 min to 30 min.

In the above method for producing a quantum dot light strip, after the glass tube is filled with a protective gas to form another plug, heat treatment is performed under a protective gas atmosphere, and then the open end of the glass tube is heated and melted and sealed for sealing, and is carried out under a protective gas atmosphere. Annealing, no oxidation during the process, and no air or moisture.

Referring to FIG. 2, a production system system 100 for a quantum dot strip of an embodiment includes a filling mechanism 10, a baking mechanism 20, and a sealing mechanism 30. The filling mechanism 10 is for loading a quantum dot colloid material into a glass tube, the baking mechanism 20 is for baking the glass tube 40, and the sealing mechanism 30 is for sealing the open end of the glass tube.

Referring to FIG. 3 and FIG. 4, the filling mechanism 10 includes a filling tank 12, a liquid supply tank 13, a first vacuum pump 14, a second vacuum pump 15, and a first protective gas tank 16 and a second protective gas tank 17, a filling tank. 12 includes a can body 121 and a sealing block 122. The can body 121 has an opening. The sealing block 122 is located at the opening of the can body 121 and a first through hole is formed in the middle of the sealing block 122. The first through hole is coaxially disposed with the opening. The tube passes through the sealing block 122 into the can body 121. In this embodiment, the filling can 12 further includes a pressing block 123 and a pressing mechanism 124. The pressing block 123 is placed on the sealing block 122, and a second perforation is formed in the middle, and the second perforation is concentric with the first perforation. The pressing mechanism 124 is used to press the pressing block 123. The pressing mechanism 124 includes a pressing rod 125, a pressing block 126 at the first end of the pressing rod 125, and a handle 127 at the second end of the pressing rod 125. The pressing block 126 is located on the pressing block 123, and the pressing block is pressed. The middle portion of the 126 is provided with a third through hole, and the third through hole is concentric with the first through hole, and the glass tube 40 sequentially passes through the pressing block 126, the pressing block 123 and the sealing block 122 to enter the can body 121. When the handle 127 is pressed, the pressing block 126 can apply pressure to the pressing block 123, so that the pressing block 123 presses the sealing block 122, and the sealing block 122 is contracted by force, and the glass tube 40 is tightly clamped, thereby the glass tube 40 and the can body 121. The joint is sealed. The filling tank 12 is in communication with the first protective gas tank 16 and the first vacuum pump 14, and when the first vacuum pump 14 is opened, the air in the filling tank 12 is evacuated to form a vacuum filling tank. When the first protective gas tank 16 is opened, a shielding gas is introduced into the filling tank 12. The shielding gas is nitrogen. The liquid supply tank 13 and the filling tank 12 are connected by a pipe 18, which is provided with a liquid supply valve 19, and when the filling is required, the liquid supply valve 19 is opened, and when the filling is completed, the liquid supply valve 19 is closed. The liquid supply tank 13 communicates with the second protective gas tank 17 and the second vacuum pump 15, and when the second vacuum pump 15 is opened, the air in the liquid supply tank 13 is evacuated, and when the second protective gas tank 17 is opened, it is introduced into the liquid supply tank 13. Protective gas. The shielding gas is nitrogen. The liquid supply tank 13 and the filling tank 12 are respectively connected with a vacuum pump and high-purity nitrogen gas, which are both a power source for controlling the liquid level and an environmental protection control means for protecting the quantum dot material. By controlling the liquid level of the filling tank 12, the quantum dot colloidal material is poured into the pre-vacuum glass tube 40. Since the specific gravity of the quantum dot colloidal material is close to that of water, a theoretically vacuumed glass tube can be filled under a vacuum condition of 10 meters. Therefore, the filling work can be easily carried out, and the filling height of the conventional product is less than 600 mm. The vacuum function of the liquid supply tank 13 can also effectively remove fine bubbles in the quantum dot colloidal material, thereby ensuring that there are no bubbles generated by the heating in the filling glass tube 40, thereby ensuring product quality.

Referring to FIG. 5, the baking mechanism 20 includes a vacuum box 21, an infrared heating furnace 22, a fourth shielding gas tank 27 and a third vacuum pump 23. The vacuum box 21 is located in the infrared heating furnace 22 and communicates with the third vacuum pump 24, and the vacuum box 21 is provided with a plurality of gas tubes 25, and the gas tubes 25 are in communication with the fourth protective gas tank 27 for charging the protective gas through the fourth protective gas tank 27 to ensure that the vacuum chamber 21 has an exact degree of vacuum, which is more favorable for drying. The steps are carried out. The inner wall of the infrared heating furnace 22 is provided with an infrared heating furnace tube 221, which emits infrared rays and performs infrared heating. The infrared heating is used here to ensure a long-time heating effect, and the heating is stable. In the vacuum tank 21, the gas tube 25 is filled with a shielding gas, here nitrogen gas. The shielding gas maintains the vacuum environment within the vacuum chamber 21 and effectively maintains any vacuum at a stable level for 12 hours during the baking process. A quartz holder 26 is also provided in the vacuum box 21 for holding the glass tube 40, holding the glass tube 40 in the vacuum box 21, and also functioning as a glass tube 40 for peace and temperature. An insulating layer 28 is also coated on the outer wall of the vacuum box 21 for heat preservation.

Referring to FIG. 6 and FIG. 7 , the sealing mechanism 30 includes a conveyor belt 31 , a fixing frame 32 , a first heating source 33 , an annealing chamber 34 , a fourth vacuum pump 35 , a third shielding gas tank 36 , and a second heating source 37 . It is fixed to the conveyor belt 31 and moves as the conveyor belt 31 operates. The first heating source 33 is disposed under the conveyor belt 31 for heating the glass tube 40 placed on the fixing frame 32. The first heating source 33 heats the open end of the glass tube 40, melts the open end, and cools to achieve the sealing effect. . The second heating source 37 is placed in the annealing chamber 34, and the fourth vacuum pump 35 and the third protective gas tank 36 are both in communication with the annealing chamber 34. The sealed glass tube 40 is placed in the annealing chamber 34, and the fourth vacuum pump 35 will be an annealing chamber. After vacuuming in 34, a protective gas is introduced through the third protective gas tank 36, and the protective gas is high-purity nitrogen. The second heating source 37 heats the glass tube 40 for annealing. The temperature of the second heating source 37 is lower than the temperature of the first heating source 33, thereby heating and cooling the temperature to achieve the purpose of annealing. The first heating source 33 is a hydrogen-oxygen generator that emits a high-temperature oxyhydrogen flame. The second heating source 37 is a conventional heating device. A support frame 38 is disposed within the annealing chamber 34, and the glass tube 40 is placed on the support frame 38.

The method for producing a quantum dot strip by the above system is:

A quantum dot colloid material is provided, and the glass tube 40 is open at one end and closed at the other end. Therefore, the open end and the closed end are provided, and the open end of the glass tube 40 is extended from the sealing block 122 into the filling tank 12 to open the first A vacuum pump 14 draws the filling tank 12 under vacuum. The air in the liquid supply tank 13 is partially evacuated by the second vacuum pump 15, and then the high-purity nitrogen shielding gas is filled into the liquid supply tank 13 through the second protective gas tank 17, thereby protecting the quantum dot colloid material from entering the air and Other impurities. The liquid supply valve 19 is opened, and the liquid supply tank 13 injects the quantum dot colloidal material into the filling tank 13. Since the filling tank 12 and the liquid supply tank 13 are in a vacuum environment, the liquid level in the filling tank 12 rises, and the filling tank When the liquid level of the quantum dot colloidal material in 12 is higher than the open end of the glass tube 40, the quantum dot colloid material is filled into the glass tube 40 from the open end of the glass tube 40, and the first protective gas is opened after the quantum dot colloid material fills the glass tube. The tank 16 is filled with nitrogen gas into the filling tank 12, and nitrogen gas enters the open end of the glass tube 40, and a nitrogen plug is formed at the open end of the glass tube 40 so that the air does not enter the glass tube 40. The vacuum degree of the filling tank 12 and the liquid supply tank 13 is maintained at 7*10 ^-2 Mpa-5*10 ^-2 Mpa, specifically 6*10 ^-2 Mpa.

The glass tube 40 containing the quantum dot colloid material is placed in the vacuum box 21 (the open end of the glass tube 40 is facing downward during the movement), the third vacuum pump 24 is turned on to evacuate the vacuum box 21, and then the fourth protective gas tank is turned on. 27, in the gas tube 25 of the vacuum box 21 is filled with high-purity nitrogen gas, the heating furnace tube 221 of the infrared heating furnace 22 is turned on, the temperature is raised to 150 ° C -200 ° C, and the first preset time is heated, the first preset time is The quantum dot colloidal material in the glass tube 40 is heat-cured at 2 min to 30 min. In the present embodiment, the glass tube 40 is placed on the quartz holder 26 in the vacuum box 21, and the quartz holder 26 is used to support the glass tube 40, and the glass tube 40 is held in the vacuum box 21, and Glass tube 40 for peace and temperature functions. The vacuum of the vacuum box 21 is 0.7 to 1.0 atm, specifically 0.8 atm.

The glass tube 40 is taken out from the vacuum box 21 and placed on the holder 32. The open end of the glass tube 40 faces downward, and the conveyor belt 31 drives the glass tube 40 to the hydrogen-oxygen generator 33 to heat the open end of the glass tube 40. The second preset time is 0.5min-10min, and is heated to the open end of the glass tube 40 to be heated and melted, thereby achieving the purpose of sealing. The glass tube 40 is placed in the annealing chamber 34 having the second heating source 37, and the fourth vacuum pump 35 evacuates the annealing chamber 34, and then the third shielding gas tank 36 is filled with the high purity nitrogen gas into the annealing chamber 34. The second heating source 37 is heated to 80 ° C - 90 ° C, and is kept for a third preset time, the third preset time is 0.5 Min-30 min, adjusted according to the state of the glass tube 40. The temperature of the second heating source 37 is lower than the temperature of the first heating source 33, thereby heating and cooling the temperature to achieve the purpose of annealing. The glass tube 40 is taken out, that is, a quantum dot light strip is obtained. The heating temperature of the oxyhydrogen generator is 1900 ° C to 2100 ° C. The second heating source is heated to between 80 °C and 90 °C.

It should be noted that in the subsequent steps after the completion of the filling of the quantum dot colloid material, the opening of the glass tube 40 needs to be performed downward to prevent nitrogen from escaping from the glass tube 40, and the air enters the glass tube 40.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (20)

1. A method for producing a quantum dot strip includes:

   Providing a quantum dot colloid material and a glass tube, the glass tube comprising an open end and a closed end, the open end of the glass tube is facing downward, and the quantum dot colloid material is loaded from the open end under vacuum In the glass tube;

   Filling the glass tube with a shielding gas to form a gas plug;

   Heating the glass tube and the quantum dot colloidal material under an atmosphere of a shielding gas;

   Heating and sintering the open end of the glass tube; and

   The glass tube is annealed in an atmosphere of a shielding gas.
2. The method according to claim 1, wherein said step of heat-treating said glass tube under a protective gas atmosphere is performed by using an infrared heating furnace.
3. The method according to claim 1, wherein the step of heating the glass tube in a protective gas atmosphere has a heating temperature of 150 ° C to 200 ° C and a heating time of 2 min to 30 min.
4. The method according to claim 1, wherein said step of heating and melting the open end of said glass tube is carried out in an oxyhydrogen generator.
5. The method according to claim 1, wherein the step of heating and melting the open end of the glass tube is performed at a heating temperature of 1900 ° C to 2000 ° C and a heating time of 0.5 min to 10 min.
6. The method according to claim 1, wherein the annealing of the glass tube is performed at a temperature of 80 ° C to 90 ° C and an annealing time of 0.5 min to 30 min under a protective gas atmosphere.
7. The method of claim 1 wherein said shielding gas is nitrogen.
8. The method according to claim 1, wherein the atmosphere of the shielding gas has a gas pressure of 0.7 to 1.0 atm.
9. A quantum dot light strip production system comprising:

   a filling mechanism for loading a quantum dot colloidal material into the glass tube and filling the glass tube with a protective gas to form a gas plug; the filling mechanism comprises a filling tank, a liquid supply tank, a first vacuum pump, and a second a vacuum pump, a first protective gas tank and a second protective gas tank; the filling tank comprising a tank body and a sealing block, the tank body having an opening, the sealing block being located at an opening of the tank body and provided with a first a perforation, the first perforation being concentric with the opening, the filling tank being in communication with the first protective gas tank and the first vacuum pump; the liquid supply tank and the filling tank being connected by a pipe a liquid supply valve is disposed on the pipeline, and the liquid supply tank is in communication with the second protective gas tank and the second vacuum pump;

   a baking mechanism for heating the glass tube and the quantum dot colloidal material under a protective gas atmosphere; the baking mechanism comprises a vacuum box, an infrared heating furnace, a fourth protective gas tank and a third a vacuum pump, the vacuum box is located in the infrared heating furnace and is in communication with the third vacuum pump, wherein the vacuum box is provided with a plurality of gas tubes, and the gas tubes are connected to the fourth protective gas tank;

   a sealing mechanism for heating and melting the open end of the glass tube and annealing the glass tube under a protective gas atmosphere; the sealing mechanism comprises a fixing frame, a first heating source, an annealing chamber, and a fourth a vacuum pump, a third protective gas tank, and a second heating source, the first heating source being disposed under the fixing frame; the second heating source being disposed in the annealing chamber, the third protective gas tank and The fourth vacuum pump is in communication with the annealing chamber.
10. The system according to claim 9, wherein said filling can further comprises a pressing block, said pressing block being located on said sealing block, said central portion of said pressing block being provided with a second perforation, said second The perforation is concentric with the first perforation.
11. The system according to claim 10, wherein said filling can further comprises a pressing mechanism, said pressing mechanism comprising a pressing bar, a pressing block and a handle, said pressing bar comprising a first segment and a second And the pressing block is located at a first end of the pressing rod, the handle is located at a second end of the pressing rod; and the pressing block is located on the pressing block.
12. The system of claim 11 wherein a central portion of said compression block is provided with a third perforation, said third perforation being concentric with said first perforation.
13. The system of claim 9 wherein said vacuum chamber is provided with a quartz holder for supporting the glass tube.
14. The system of claim 9 wherein said closure mechanism further comprises a conveyor belt disposed on said conveyor belt, said first heat source being disposed below said conveyor belt.
15. A method for producing a quantum dot strip includes:

    Providing a quantum dot colloid material and a glass tube, the glass tube comprising an open end and a closed end, the open end of the glass tube is facing downward, and the open end is extended from the sealing block into the filling tank to open the first The vacuum pump vacuums the filling tank, opens the second vacuum pump to evacuate the liquid supply tank, then opens the second protective gas tank to fill the liquid supply tank with nitrogen gas, and then opens the liquid supply valve, and the liquid supply tank injects into the filling tank Quantum dot colloidal material, when the liquid level of the quantum dot colloidal material in the filling tank is higher than the open end of the glass tube, the quantum dot colloid material is filled into the glass tube by the open end of the glass tube, and the quantum dot colloid material is filled with the glass tube and then opened. The first protective gas tank is filled with nitrogen gas into the filling tank, and the nitrogen gas enters the glass tube to form a nitrogen plug in the glass tube;

    The glass tube with the quantum dot colloidal material is placed in a vacuum box, the vacuum box is evacuated by a third vacuum pump, and then the protective gas is filled in the inflation tube of the vacuum box through the fourth protective gas tank, and then the infrared heating furnace is used. The glass tube is subjected to heat treatment;

    Removing the glass tube from the vacuum box and placing it on a fixing frame, and heating and melting the open end of the glass tube by a first heating source;

    The glass tube is placed in an annealing chamber having a second heating source, and the fourth vacuum pump evacuates the annealing chamber, and then the protective gas is filled in the annealing chamber through the third protective gas tank, and the glass tube is annealed. That is, the quantum dot light strip is obtained.
16. The method according to claim 15, wherein said glass tube containing the quantum dot colloid material is placed in a vacuum box, the vacuum box is evacuated by a third vacuum pump, and then passed through a fourth protective gas tank in a vacuum The inflation tube of the tank is filled with a shielding gas, and the heating temperature of the glass tube is further heated to 150 ° C to 200 ° C in the step of heating the glass tube by the infrared heating furnace, and the heating time is 2 min to 30 min.
17. The method according to claim 15, wherein the step of removing the glass tube from the vacuum box and placing it on a holder, and heating and melting the open end of the glass tube by a first heating source The first heating source is a hydrogen-oxygen generator, the heating temperature is 1900 ° C ~ 2000 ° C, and the heating time is 0.5 min ~ 10 min.
18. The method according to claim 15, wherein said glass tube is placed in an annealing chamber having a second heating source, and the fourth vacuum pump evacuates the annealing chamber and then anneals through the third protective gas tank The chamber is filled with a shielding gas, and the glass tube is annealed, that is, the temperature of the annealing treatment in the step of obtaining the quantum dot strip is 80 ° C to 90 ° C, and the time is 0.5 min to 30 min.
19. The method according to claim 15, wherein said opening the first vacuum pump to evacuate the filling tank and said opening the second vacuum pump to evacuate the liquid supply tank to a vacuum of 7*10 ^-2 Mpa-5 *10 ^-2 Mpa.
20. The method according to claim 15, wherein the gas in the vacuum tank of the vacuum tank is filled with the shielding gas to the vacuum chamber at a gas pressure of 0.7 to 1.0 atmosphere; and the third protective gas tank is annealed. The chamber is filled with a shielding gas to a pressure of 0.7 to 1.0 atmospheres in the annealing chamber.