CN114289260A - Needle cylinder device and method for reducing sedimentation and improving light-color consistency - Google Patents
Needle cylinder device and method for reducing sedimentation and improving light-color consistency Download PDFInfo
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- CN114289260A CN114289260A CN202111665232.5A CN202111665232A CN114289260A CN 114289260 A CN114289260 A CN 114289260A CN 202111665232 A CN202111665232 A CN 202111665232A CN 114289260 A CN114289260 A CN 114289260A
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Abstract
The invention discloses a needle cylinder device for reducing sedimentation and improving light-color consistency, which comprises a dispensing needle cylinder and a circulating pipeline, wherein the dispensing needle cylinder is provided with a plurality of holes; the lower end of the dispensing needle cylinder is provided with a glue leading port, and the upper end of the dispensing needle cylinder is provided with a glue returning port; the circulating pipeline comprises a circulating pipe and a fluid driving device, wherein two ends of the circulating pipe are respectively connected with the glue guiding opening and the glue returning opening, the fluid driving device is arranged on the circulating pipe, and the fluid driving device is used for driving fluid in the circulating pipe to flow from the glue guiding opening to the glue returning opening. According to the needle cylinder device for reducing sedimentation and improving light color consistency, the circulating pipeline is arranged, so that fluorescent powder glue in the dispensing needle cylinder can be pumped from the lower end of the dispensing needle cylinder to the upper end of the dispensing needle cylinder, the fluorescent powder glue in the dispensing needle cylinder flows circularly and is uniformly mixed, sedimentation of the fluorescent powder glue in the dispensing process is avoided, light color consistency is ensured, and the yield is improved.
Description
Technical Field
The invention belongs to the technical field of LED (light emitting diode) packaging, and particularly relates to a needle cylinder device and a method for reducing sedimentation and improving light-color consistency.
Background
An LED is a solid-state semiconductor device capable of converting electrical energy into visible light, which can directly convert electricity into light, and has the advantages of environmental protection, ultra-long life, high efficiency, energy saving, simple structure, small volume, light weight, etc., and thus it is generally considered as a light source product that is the fastest to be developed, and will inevitably replace almost all conventional lighting products in the near future.
The fluorescent powder is an essential important powder material for producing the lighting LED, particularly in the method for manufacturing the white light LED, the fluorescent powder plays a very critical role, the performance of the fluorescent powder directly influences the brightness, color coordinates, color temperature, color rendering property and the like of the white light LED, the color and the lumen value of the LED packaging finished product are generally adjusted by controlling the dispensing parameters of the fluorescent powder, generally, the dispensing process link comprises the steps of uniformly mixing the fluorescent powder and silica gel to prepare fluorescent powder glue, and then dispensing the fluorescent powder glue on an LED chip.
Chinese patent publication No. CN104465949A discloses a dispensing method in LED lamp packaging, which comprises the steps of disposing fluorescent glue, dispensing the fluorescent glue on the upper portion of transparent glue in a bracket cup until the bracket cup is filled, placing the dried bracket cup in a cooling chamber until the temperature of the bracket cup reaches normal temperature, and solving the problem that in the prior art, a yellow aperture is easily generated in the LED packaging process, but in the actual dispensing process, the organic silicon resin and the phosphor are mixed and then precipitate along with the change of time in the glue discharging process of a container, which causes the change of the weight of the phosphor before and after the change of the phosphor weight, the difference of the lighting and exciting effects of chips, and the problems of discrete distribution on the CIE color block diagram, poor light and color consistency, and reduced yield.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a needle cylinder device and a method for reducing sedimentation and improving light-color consistency, which can avoid sedimentation in a dispensing process, ensure light-color consistency and improve yield.
The invention adopts the following technical scheme:
a syringe device for reducing sedimentation and improving light-color consistency comprises a dispensing syringe and a circulating pipeline;
the lower end of the dispensing needle cylinder is provided with a glue leading port, and the upper end of the dispensing needle cylinder is provided with a glue returning port;
the circulating pipeline comprises a circulating pipe and a fluid driving device, wherein two ends of the circulating pipe are respectively connected with the glue guiding opening and the glue returning opening, the fluid driving device is arranged on the circulating pipe, and the fluid driving device is used for driving fluid in the circulating pipe to flow from the glue guiding opening to the glue returning opening.
In some embodiments, the dispensing syringe comprises a barrel body and a cone, the cone is fixed at the lower end of the barrel body, and the glue leading port and the glue returning port are respectively arranged on the side walls of the cone and the barrel body.
In some embodiments, the dispensing device further comprises a stirring device, the stirring device comprises a rotary driving device fixed on the outer surface of the dispensing needle cylinder and a stirring part located in the dispensing needle cylinder, an output shaft of the rotary driving device extends into the dispensing needle cylinder, and the stirring part is fixedly connected with the output shaft.
In some embodiments, the dispensing device further comprises a controller and a temperature sensor, wherein the detection end of the temperature sensor is inserted into the dispensing needle cylinder, and the controller is electrically connected with the temperature sensor and the rotary driving device; when the temperature detected by the temperature sensor is greater than a set threshold value, the controller controls the rotary driving device to reduce the rotating speed.
In some embodiments, the sensing end of the temperature sensor is disposed at the distal end of the output shaft.
In some embodiments, the output shaft is hollow, and the lead of the temperature sensor is connected to the detection end through the output shaft.
In some embodiments, the dispensing device further comprises a temperature display screen fixed on the outer surface of the dispensing needle cylinder, and the temperature display screen is electrically connected with the temperature sensor.
In some embodiments, the rotational drive has a rotational speed of 70rpm/min to 95 rpm/min.
In some embodiments, the stirring portion is a helical structure that rotates about an axis of the output shaft.
A method for reducing sedimentation and improving light-color consistency, which adopts the needle cylinder device for reducing sedimentation and improving light-color consistency, and comprises the following steps:
mixing fluorescent powder and organic silica gel in proportion to prepare fluorescent powder glue;
placing the fluorescent powder glue into the glue dispensing needle cylinder;
and dispensing by using the dispensing needle cylinder filled with the fluorescent powder glue, wherein the fluid driving device and the rotary driving device are started in the process of dispensing the fluorescent powder glue to the LED chip, and the fluorescent powder glue in the needle cylinder is uniformly mixed by circulation and stirring.
Compared with the prior art, the invention has the beneficial effects that:
according to the needle cylinder device for reducing sedimentation and improving light color consistency, the circulating pipeline is arranged, so that fluorescent powder glue in the dispensing needle cylinder can be pumped from the lower end of the dispensing needle cylinder to the upper end of the dispensing needle cylinder, the fluorescent powder glue in the dispensing needle cylinder flows circularly and is uniformly mixed, sedimentation of the fluorescent powder glue in the dispensing process is avoided, light color consistency is ensured, and the yield is improved.
Drawings
The technology of the present invention will be described in further detail with reference to the accompanying drawings and detailed description below:
FIG. 1 is a schematic diagram of the overall structure of the syringe device for reducing sedimentation and improving consistency of light and color according to the present invention.
Reference numerals:
1-dispensing needle cylinder; 11-a barrel body; 111-glue leading port; 12-a cone part; 121-glue returning opening;
2-a circulation pipeline; 21-a fluid driving device; 22-a circulation pipe;
3-a stirring device; 31-a rotation drive; 311-an output shaft; 32-a stirring section;
4-a temperature sensor;
5-temperature display screen.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The same reference numbers will be used throughout the drawings to refer to the same or like parts.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.
Referring to fig. 1, a syringe device for reducing sedimentation and improving light color consistency comprises a dispensing syringe 1 and a circulation pipeline 22.
The lower end of the dispensing needle cylinder 1 is provided with a glue leading port 111, and the upper end of the dispensing needle cylinder 1 is provided with a glue returning port 121; the circulation pipeline 22 comprises a circulation pipeline 22 with two ends respectively connected with the glue guiding port 111 and the glue returning port 121, and a fluid driving device 21 arranged on the circulation pipeline 22, wherein the fluid driving device 21 is used for driving fluid from the glue guiding port 111 to the glue returning port 121 in the circulation pipeline 22.
After the fluorescent powder glue is filled in the dispensing syringe 1, the fluid driving device 21 can be started to drive the fluorescent powder glue to circularly flow between the dispensing syringe 1 and the circulating pipe 22, so that the fluorescent powder glue is prevented from standing and settling. The dispensing syringe 1 keeps circulating flow while dispensing. In particular, the fluid drive device 21 is a micro negative pressure pump, which is movable together with the dispensing syringe 1.
Based on the structure, the needle cylinder device for reducing sedimentation and improving light color consistency can pump the fluorescent powder glue in the dispensing needle cylinder 1 from the lower end of the dispensing needle cylinder 1 to the upper end of the dispensing needle cylinder 1, so that the fluorescent powder glue in the dispensing needle cylinder 1 circularly flows and is uniformly mixed, sedimentation of the fluorescent powder glue in the dispensing process is avoided, light color consistency is ensured, and the yield is improved. In addition, the fluorescent powder glue is uniformly mixed in a circulating flow mode, the mechanical vibration is small, and the precision of the dispensing action of the dispensing needle cylinder 1 cannot be influenced.
Specifically, the dispensing syringe 1 includes a barrel 11 and a cone 12, the cone 12 is fixed at the lower end of the barrel 11, and the glue leading port 111 and the glue returning port 121 are respectively disposed on the side walls of the cone 12 and the barrel 11 to ensure that all the fluorescent powder glue flows circularly.
Preferably, the syringe device for reducing sedimentation and improving light-color consistency further comprises a stirring device 3, the stirring device 3 comprises a rotary driving device 31 fixed on the outer surface of the dispensing syringe 1 and a stirring part 32 positioned in the dispensing syringe 1, an output shaft 311 of the rotary driving device 31 extends into the dispensing syringe 1, and the stirring part 32 is fixedly connected with the output shaft 311. Can stir phosphor powder glue in some glue cylinder 1 through agitating unit 3, further glue the phosphor powder glue mixing in some glue cylinder 1, avoid subsiding, say from the mixing effect, have great promotion.
In some embodiments, the syringe device for reducing sedimentation and improving consistency of light and color of the present invention further comprises a controller and a temperature sensor 4, wherein a detection end of the temperature sensor 4 is inserted into the dispensing syringe 1, and the controller is electrically connected to the temperature sensor 4 and the rotary driving device 31; when the temperature detected by the temperature sensor 4 is greater than a set threshold, the controller controls the rotation driving device 31 to reduce the rotation speed. Namely, the stirring speed of the invention is adjustable, because the temperature of the fluorescent powder glue is gradually increased in the stirring process, the viscosity of the fluorescent powder glue is obviously reduced after the fluorescent powder glue is heated, the sedimentation of the fluorescent powder is intensified, and the adverse effect is achieved. Specifically, the rotation speed of the rotation driving device 31 is 70rpm/min to 95 rpm/min. In one embodiment, the rotary drive 31 is an adjustable speed motor. In one embodiment, the threshold is set at 35 ℃.
In some embodiments, the detection end of the temperature sensor 4 is disposed at the end of the output shaft 311. Wherein the output shaft 311 is hollow, and the wire of the temperature sensor 4 is connected to the detection end through the output shaft 311, in this way, the wire can be prevented from being wound.
Preferably, the syringe device for reducing sedimentation and improving light-color consistency further comprises a temperature display screen 5 fixed on the outer surface of the dispensing syringe 1, wherein the temperature display screen 5 is electrically connected with the temperature sensor 4, so that the temperature of the fluorescent powder glue inside can be checked through the temperature display screen 5, and monitoring by workers is facilitated.
In some embodiments, the stirring portion 32 is a spiral structure rotating around the axis of the output shaft 311, and similar to a spiral conveying rod, due to the small space inside the dispensing syringe 1, the spiral structure can still provide sufficient stirring capability inside the small dispensing syringe 1.
The invention also provides a method for reducing sedimentation and improving light-color consistency, which adopts the needle cylinder device for reducing sedimentation and improving light-color consistency, and the method comprises the following steps:
s1, mixing fluorescent powder and organic silica gel in proportion to prepare fluorescent powder glue, wherein the specific proportion refers to the fluorescent powder glue in the conventional technology;
s2, placing the fluorescent powder glue into the glue dispensing needle cylinder 1;
and S3, dispensing by using the dispensing syringe 1 filled with the fluorescent powder glue, wherein in the process of dispensing to the LED chip, the fluid driving device 21 and the rotary driving device 31 are started, and the fluorescent powder glue in the syringe is uniformly mixed by circulation and stirring. The fluorescent powder glue is kept in circulating flow and stirring in the dispensing process, so that the fluorescent powder glue is prevented from settling, and the light and color consistency of the product is improved.
Other contents of the syringe device and method for reducing sedimentation and improving light-color consistency of the invention refer to the prior art, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A syringe device for reducing sedimentation and improving light-color consistency is characterized by comprising a dispensing syringe and a circulating pipeline;
the lower end of the dispensing needle cylinder is provided with a glue leading port, and the upper end of the dispensing needle cylinder is provided with a glue returning port;
the circulating pipeline comprises a circulating pipe and a fluid driving device, wherein two ends of the circulating pipe are respectively connected with the glue guiding opening and the glue returning opening, the fluid driving device is arranged on the circulating pipe, and the fluid driving device is used for driving fluid in the circulating pipe to flow from the glue guiding opening to the glue returning opening.
2. The syringe device for reducing sedimentation and improving light and color consistency according to claim 1, wherein the dispensing syringe comprises a syringe body and a cone, the cone is fixed at the lower end of the syringe body, and the glue leading port and the glue returning port are respectively arranged on the side walls of the cone and the syringe body.
3. The needle cylinder device for reducing sedimentation and improving light and color consistency according to claim 1 or 2, further comprising a stirring device, wherein the stirring device comprises a rotary driving device fixed on the outer surface of the dispensing needle cylinder and a stirring part positioned in the dispensing needle cylinder, an output shaft of the rotary driving device extends into the dispensing needle cylinder, and the stirring part is fixedly connected with the output shaft.
4. The needle cylinder device for reducing sedimentation and improving light and color consistency according to claim 3, further comprising a controller and a temperature sensor, wherein a detection end of the temperature sensor is inserted into the dispensing needle cylinder, and the controller is electrically connected with the temperature sensor and the rotary driving device; when the temperature detected by the temperature sensor is greater than a set threshold value, the controller controls the rotary driving device to reduce the rotating speed.
5. The needle cylinder device for reducing sedimentation and improving consistency of light and color according to claim 4, wherein a detection end of the temperature sensor is arranged at the tail end of the output shaft.
6. The needle cylinder device for reducing sedimentation and improving consistency of light and color according to claim 5, wherein the output shaft is hollow, and a lead of the temperature sensor penetrates through the output shaft to be connected to the detection end.
7. The needle cylinder device for reducing sedimentation and improving consistency of light and color according to claim 4, further comprising a temperature display screen fixed on the outer surface of the dispensing needle cylinder, wherein the temperature display screen is electrically connected with the temperature sensor.
8. The needle cylinder device for reducing sedimentation and improving consistency of light and color according to claim 4, wherein the rotating speed of the rotating driving device is 70rpm/min to 95 rpm/min.
9. The needle cylinder device for reducing sedimentation and improving consistency of light and color according to claim 3, wherein the stirring part is of a spiral structure rotating around the axis of the output shaft.
10. A method for reducing sedimentation and improving light-color consistency, which is characterized in that a needle cylinder device for reducing sedimentation and improving light-color consistency as claimed in any one of claims 3 to 9 is adopted, and the method comprises the following steps:
mixing fluorescent powder and organic silica gel in proportion to prepare fluorescent powder glue;
placing the fluorescent powder glue into the glue dispensing needle cylinder;
and dispensing by using the dispensing needle cylinder filled with the fluorescent powder glue, wherein the fluid driving device and the rotary driving device are started in the process of dispensing the fluorescent powder glue to the LED chip, and the fluorescent powder glue in the needle cylinder is uniformly mixed by circulation and stirring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111665232.5A CN114289260A (en) | 2021-12-31 | 2021-12-31 | Needle cylinder device and method for reducing sedimentation and improving light-color consistency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111665232.5A CN114289260A (en) | 2021-12-31 | 2021-12-31 | Needle cylinder device and method for reducing sedimentation and improving light-color consistency |
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| CN114289260A true CN114289260A (en) | 2022-04-08 |
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| CN101118941A (en) * | 2006-08-03 | 2008-02-06 | 夏普株式会社 | Injection apparatus, semiconductor light emitting apparatus, manufacturing apparatus, and manufacturing method of semiconductor light emitting apparatus |
| JP2011142255A (en) * | 2010-01-08 | 2011-07-21 | Citizen Holdings Co Ltd | Method of manufacturing led light source |
| JP2013012550A (en) * | 2011-06-28 | 2013-01-17 | Konica Minolta Advanced Layers Inc | Phosphor applying apparatus |
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