CN111295010A - Constant-current deep ultraviolet LED device and manufacturing method thereof - Google Patents
Constant-current deep ultraviolet LED device and manufacturing method thereof Download PDFInfo
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- CN111295010A CN111295010A CN202010112840.2A CN202010112840A CN111295010A CN 111295010 A CN111295010 A CN 111295010A CN 202010112840 A CN202010112840 A CN 202010112840A CN 111295010 A CN111295010 A CN 111295010A
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Abstract
The application discloses a constant-current deep ultraviolet LED device and a manufacturing method thereof, and the method comprises the following steps: the ceramic substrate is provided with a UVC LED and a UVA LED which are positioned above the ceramic substrate; the UVC LED is positioned in the central area of the whole device, and the UVA LED is positioned on one side of the UVC LED; further comprising: the first constant current diode is positioned above the ceramic substrate and is connected with the UVC LED in series; and/or a second constant current diode located above the ceramic substrate and in series with the UVA LED. Therefore, the constant current diode is added into the LED device, on the premise of realizing the same function, high-value devices such as an IC chip and the like are not needed, the design of the constant current driving circuit is greatly simplified at the application end, the types of high-price components are reduced, the cost is greatly reduced, the LED devices with different powers can be matched with the constant current diodes with different specifications, different constant current conditions can be realized under the same process, the convenience is high, and the product has higher competitiveness.
Description
Technical Field
The invention relates to the technical field of display, in particular to a constant-current deep ultraviolet LED device and a manufacturing method thereof.
Background
At present, with the increasing demand of human beings for quality of life, the demand of ultraviolet LEDs for sterilization and disinfection in the field of LED lighting is increasing, and the related performance requirements of such LEDs are also increasing. However, ultraviolet products are often mixed with different wave bands, and each branch corresponds to different currents, so that the circuit design at the application end is complex, and the cost is high.
The existing deep ultraviolet LED devices are divided into a UVA path and a UVC path. The UVA route mainly acts to decompose and sterilize bacterial reactions, and the UVC route mainly acts to destroy bacterial DNA/RNA structures and sterilize. In the prior art, a UVA path and a UVC path are connected in parallel or in series and packaged into an LED device for the fields of sterilization, disinfection, medical treatment, water purification and the like.
Because the LED device needs to work under the constant current condition, the LED device can be realized only by the drive circuit, and under the control cost requirement, the LED devices with different power specifications need different drive circuits to meet the required constant current condition, and the application end client of the LED device needs to be matched with various drives in use. Deep ultraviolet LED devices have severe requirements for constant current. And the drive circuit with excellent performance needs components such as an IC chip, a transformer, a capacitor, a resistor, a diode and the like, wiring is complex, processing is complex, and cost is greatly increased.
Therefore, how to solve the problems of constant current of the input LED device, complex design of the LED driving circuit, high cost, and the like when the deep ultraviolet device is applied at a terminal is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a constant current deep ultraviolet LED device and a manufacturing method thereof, which do not need high-value devices such as IC chips, simplify the circuit, and greatly reduce the cost of the application end. The specific scheme is as follows:
a constant current deep ultraviolet LED device, comprising: a ceramic substrate, a UVC LED and a UVA LED positioned over the ceramic substrate; the UVC LED is positioned in the central area of the whole device, and the UVA LED is positioned on one side of the UVC LED; further comprising:
the first constant current diode is positioned above the ceramic substrate and is connected with the UVC LED in series; and/or the presence of a gas in the gas,
and the second constant current diode is positioned above the ceramic substrate and is connected with the UVA LED in series.
Preferably, in the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, a branch where the first constant current diode is located is parallel to a branch where the UVC LED is located;
and the branch where the second constant current diode is located is vertical to the branch where the UVA LED is located.
Preferably, in the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, the first constant current diode is specifically located in the middle of the branch where the first constant current diode is located;
the second constant current diode is specifically located in the middle of the branch where the second constant current diode is located.
Preferably, in the constant current deep ultraviolet LED device provided in the embodiment of the present invention, the constant current deep ultraviolet LED device further includes:
the copper cup bracket is fixed with the ceramic substrate; the ceramic substrate and the copper cup support are of an integrated structure.
Preferably, in the constant current deep ultraviolet LED device provided in the embodiment of the present invention, the constant current deep ultraviolet LED device further includes:
and the voltage stabilizing diode is positioned above the ceramic substrate and is connected with the UVC LED in parallel.
Preferably, in the constant current deep ultraviolet LED device provided in the embodiment of the present invention, the constant current deep ultraviolet LED device further includes:
and the quartz glass is bonded with the step of the copper cup support.
Preferably, in the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, the UVC LED, the UVA LED, the voltage regulator diode, the first constant current diode, and the second constant current diode are fixed by using the same eutectic process.
The embodiment of the invention also provides a manufacturing method of the constant-current deep ultraviolet LED device, which comprises the following steps:
designing the integrated structure size and circuit layout of the ceramic copper cup according to the size of the chip and the size of quartz glass; the chip comprises a UVC LED, a UVA LED, a voltage stabilizing diode, a first constant current diode and/or a second constant current diode;
fixing crystal on the ceramic substrate, and bonding wires to complete initial circuit connection; the first constant current diode is connected with the UVCLED in series; the second constant current diode is connected with the UVA LED in series; the voltage stabilizing diode is connected with the UVC LED in parallel;
fixing quartz glass on the designated position of the copper cup bracket;
and cutting the ceramic substrate to obtain the constant-current deep ultraviolet LED device.
Preferably, in the method for manufacturing the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, the designing a circuit layout specifically includes:
designing the branch where the first constant current diode is located and the branch where the UVC LED is located to be parallel to each other;
and designing the branch where the second constant current diode is located and the branch where the UVA LED is located to be vertical to each other.
Preferably, in the method for manufacturing the constant-current deep ultraviolet LED device provided by the embodiment of the present invention, the fixing the quartz glass at the designated position of the copper cup holder specifically includes:
coating an anti-UV adhesive on the copper cup bracket by using a high-precision dispenser;
and bonding the quartz glass lens at the step of the copper cup support, and sending the quartz glass lens into an oven to cure the glue.
According to the technical scheme, the constant-current deep ultraviolet LED device and the manufacturing method thereof provided by the invention comprise the following steps: the ceramic substrate is provided with a UVC LED and a UVA LED which are positioned above the ceramic substrate; the UVC LED is positioned in the central area of the whole device, and the UVA LED is positioned on one side of the UVC LED; further comprising: the first constant current diode is positioned above the ceramic substrate and is connected with the UVC LED in series; and/or a second constant current diode located above the ceramic substrate and in series with the UVA LED.
The constant current diode is added in the LED device, on the premise of realizing the same function, high-value devices such as an IC chip and the like are not needed, the design of the constant current driving circuit is greatly simplified at the application end, the types of high-price components are reduced, the cost and the processing cost of the application end are greatly reduced, the LED devices with different powers can be matched with the constant current diodes with different specifications, different constant current conditions can be realized under the same process, the convenience is realized, and the product has higher competitiveness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic side view of a constant current deep ultraviolet LED device according to an embodiment of the present invention;
fig. 2 is a schematic front structure diagram of a constant-current deep ultraviolet LED device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a constant current deep ultraviolet LED device provided in an embodiment of the present invention;
fig. 4 is a flowchart of a method for manufacturing a constant current deep ultraviolet LED device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a constant-current deep ultraviolet LED device, as shown in figures 1 to 3, comprising: the LED lamp comprises a ceramic substrate 01, a UVC LED 02 and a UVA LED03, wherein the UVC LED 02 and the UVA LED03 are positioned above the ceramic substrate 01; the UVC LED 02 is positioned in the central region of the whole device, and the UVA LED03 is positioned on one side of the UVC LED 02; further comprising:
a first constant current Diode (CRD) 04 located above the ceramic substrate 01 and connected in series with the UVC LED 02; and/or the presence of a gas in the gas,
a second constant current Diode (CRD) 05 located above the ceramic substrate 01 and connected in series with the UVA LED 03.
For convenience of description, the first constant current diode is described as a first CRD and the second constant current diode is described as a second CRD.
In the constant-current deep ultraviolet LED device provided by the embodiment of the invention, a first CRD connected with a UVC LED in series is added; and/or a second CRD in series with the UVA LED. Therefore, the CRD is added into the LED device, on the premise of realizing the same function, high-value devices such as an IC chip and the like are not needed, the design of a constant current driving circuit is greatly simplified at the application end, the types of high-price components are reduced, the cost is greatly reduced, the LED devices with different powers can be matched with the CRD with different specifications, different constant current conditions can be realized under the same process, the operation is very convenient, and the product has higher competitiveness.
The UVC LED is a deep ultraviolet UVC, and the wavelength range is 260nm to 280 nm; the UVA LED is light ultraviolet UVA, the wavelength range is 360nm to 415nm, and two paths of the UVC LED and the UVA LED are conducted; the UVA LEDs may be specifically located at a mid-position of the upper half of the entire device as shown in fig. 2. In practical application, the CRD is not limited to be used in a UVA path or a UVC path or in two or more paths; the CRD is used for realizing the control of current in the circuit, can be correspondingly increased if needed, can be omitted if the function is not needed, and is flexible in usability.
In specific implementation, in the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, as shown in fig. 2, the branch where the first CRD is located and the branch where the UVC LED is located are parallel to each other; the branch where the second CRD is located is perpendicular to the branch where the UVA LED is located. Specifically, the positive and negative electrodes of the two CRDs are the same as those of the UVC LED and the UVA LED, and are consistent with the polarity of the whole device, as shown in fig. 2, the left sides of the UVC LED and the UVA LED are negative electrodes, and the right sides thereof are positive electrodes; the left side of the first CRD is a positive electrode, and the right side of the first CRD is a negative electrode; the upper part of the second CRD is a positive electrode, and the lower part of the second CRD is a negative electrode.
Further, in specific implementation, in the constant-current deep ultraviolet LED device provided in the embodiment of the present invention, as shown in fig. 2, the first CRD is specifically located in the middle of the branch where the first CRD is located; the second CRD is specifically located in the middle of the branch where the second CRD is located. In practical applications, the positions of the two CRDs may vary to a small extent, and are not limited herein.
In specific implementation, as shown in fig. 1, the constant-current deep ultraviolet LED device provided in the embodiment of the present invention may further include: a copper cup holder 06 fixed to the ceramic substrate 01; the ceramic substrate 01 and the copper cup holder 06 are of an integrated structure, that is, the ceramic substrate 01 and the copper cup holder 06 are formed in a non-assembly manner. The copper cup support 06 in the ceramic copper cup integrated structure is an integrated support manufactured on the ceramic substrate 01 by sputtering and electroplating.
In specific implementation, as shown in fig. 1 and fig. 2, the constant-current deep ultraviolet LED device provided in the embodiment of the present invention may further include: and a zener diode 07(ZenerDiode) positioned above the ceramic substrate 01 and connected in parallel with the UVC LED 02. The zener diode 07 can stabilize voltage and function like a resistor.
In specific implementation, as shown in fig. 1, the constant-current deep ultraviolet LED device provided in the embodiment of the present invention may further include: and the quartz glass 08 is bonded with the step of the copper cup support 06. The quartz glass 08 may be planar or spherical, and is not limited thereto.
Further, in a specific implementation, in the constant-current deep ultraviolet LED device provided by the embodiment of the present invention, the UVCLED, the UVA LED, the first CRD, the second CRD, and the voltage regulator diode may be fixed by using the same eutectic process. Because CRD is integral type device, similar chip components and parts, by the development of supplier, the application end is fixed on the device base plate through eutectic effect with UVC LED, UVA LED etc. can not have risks such as vulcanization, broken string, stability is more reliable.
Based on the same inventive concept, the embodiment of the invention also provides a manufacturing method of the constant-current deep ultraviolet LED device, and as the principle of solving the problems of the manufacturing method is similar to that of the constant-current deep ultraviolet LED device, the implementation of the manufacturing method can refer to the implementation of the constant-current deep ultraviolet LED device, and repeated parts are not repeated.
In specific implementation, the method for manufacturing the constant-current deep ultraviolet LED device provided by the embodiment of the present invention, as shown in fig. 4, specifically includes the following steps:
s401, designing the integrated structure size and circuit layout of the ceramic copper cup according to the size of the chip and the size of quartz glass; the chip comprises a UVC LED, a UVA LED, a voltage stabilizing diode and a first CRD and/or a second CRD; the chip used herein is not limited to a flip chip and a flip chip.
It should be noted that, before the step is executed, a drawing of the integrated structure of the ceramic copper cup can be designed in advance, so as to improve the manufacturing efficiency;
s402, die bonding and wire bonding are carried out on the ceramic substrate to complete initial circuit connection; the first CRD is connected with the UVC LED in series; the second CRD is connected with the UVA LED in series; the voltage stabilizing diode is connected with the UVC LED in parallel;
it should be noted that, die bonding is to fix a chip on a device substrate, so that the chip is electrically connected; the chip device fixing process mode in the invention is a eutectic mode. Eutectic is a phenomenon that eutectic fusion occurs in eutectic solder at a relatively low temperature, eutectic alloy is directly changed from a solid state to a liquid state without passing through a plasticity stage, and the melting temperature is the eutectic temperature;
s403, fixing the quartz glass on the designated position of the copper cup support;
and S404, cutting the ceramic substrate to obtain the constant-current deep ultraviolet LED device.
In the manufacturing method of the constant-current deep ultraviolet LED device provided by the embodiment of the invention, the CRD can be manufactured and added in the LED device through the steps, and on the premise of realizing the same function, high-value devices such as an IC chip and the like are not needed, so that the circuit is greatly simplified, the types of high-price components are reduced, the cost is greatly reduced, and the product has higher competitiveness.
Further, in a specific implementation, in the method for manufacturing the constant current deep ultraviolet LED device provided in the embodiment of the present invention, the step S401 may be to design a circuit layout, and specifically, the method may include: designing the branch where the first CRD is located and the branch where the UVC LED is located to be parallel to each other; and designing the branch where the second CRD is positioned and the branch where the UVA LED is positioned to be vertical to each other.
Further, in a specific implementation, in the method for manufacturing the constant-current deep ultraviolet LED device provided by the embodiment of the present invention, the step S403 may be to fix the quartz glass at a specified position of the copper cup holder, and specifically include: firstly, coating an anti-UV adhesive on a copper cup bracket by using a high-precision dispenser; then, the quartz glass lens is bonded at the step of the copper cup support and sent into an oven to cure the glue. The UV adhesive is used for adhering the copper cup support and the quartz glass, and is positioned at the step of the copper cup support, namely the contact surface of the quartz glass and the copper cup support.
The embodiment of the invention provides a constant-current deep ultraviolet LED device and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: the ceramic substrate is provided with a UVC LED and a UVA LED which are positioned above the ceramic substrate; the UVC LED is positioned in the central region of the whole device, and the UVA LED is positioned on one side of the UVCLED; further comprising: a first CRD located above the ceramic substrate and connected in series with the UVC LED; and/or a second CRD located over the ceramic substrate and in series with the UVA LED. Therefore, the CRD is added into the LED device, on the premise of realizing the same function, high-value devices such as an IC chip and the like are not needed, the design of a constant current driving circuit is greatly simplified at the application end, the types of high-price components are reduced, the cost is greatly reduced, the LED devices with different powers can be matched with the CRD with different specifications, different constant current conditions can be realized under the same process, the operation is very convenient, and the product has higher competitiveness.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The constant-current deep ultraviolet LED device and the manufacturing method thereof provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A constant current deep ultraviolet LED device, comprising: a ceramic substrate, a UVC LED and a UVALED located over the ceramic substrate; the UVC LED is positioned in the central area of the whole device, and the UVA LED is positioned on one side of the UVC LED; it is characterized by also comprising:
the first constant current diode is positioned above the ceramic substrate and is connected with the UVC LED in series; and/or the presence of a gas in the gas,
and the second constant current diode is positioned above the ceramic substrate and is connected with the UVA LED in series.
2. The constant-current deep ultraviolet LED device according to claim 1, wherein a branch where the first constant-current diode is located and a branch where the UVC LED is located are parallel to each other;
and the branch where the second constant current diode is located is vertical to the branch where the UVA LED is located.
3. The constant-current deep ultraviolet LED device according to claim 2, wherein the first constant-current diode is specifically located in the middle of the branch where the first constant-current diode is located;
the second constant current diode is specifically located in the middle of the branch where the second constant current diode is located.
4. The constant current deep ultraviolet LED device of claim 3, further comprising:
the copper cup bracket is fixed with the ceramic substrate; the ceramic substrate and the copper cup support are of an integrated structure.
5. The constant current deep ultraviolet LED device of claim 4, further comprising:
and the voltage stabilizing diode is positioned above the ceramic substrate and is connected with the UVC LED in parallel.
6. The constant current deep ultraviolet LED device of claim 5, further comprising:
and the quartz glass is bonded with the step of the copper cup support.
7. The constant-current deep ultraviolet LED device of claim 6, wherein the UVC LED, the UVALED, the zener diode, the first constant current diode, and the second constant current diode are mounted using a same eutectic process.
8. A method for manufacturing the constant-current deep ultraviolet LED device according to any one of claims 1 to 7, comprising the following steps:
designing the integrated structure size and circuit layout of the ceramic copper cup according to the size of the chip and the size of quartz glass; the chip comprises a UVC LED, a UVA LED, a voltage stabilizing diode, a first constant current diode and/or a second constant current diode;
fixing crystal on the ceramic substrate, and bonding wires to complete initial circuit connection; the first constant current diode is connected with the UVC LED in series; the second constant current diode is connected with the UVA LED in series; the voltage stabilizing diode is connected with the UVC LED in parallel;
fixing quartz glass on the designated position of the copper cup bracket;
and cutting the ceramic substrate to obtain the constant-current deep ultraviolet LED device.
9. The constant-current deep ultraviolet LED device according to claim 8, wherein designing a circuit layout specifically comprises:
designing the branch where the first constant current diode is located and the branch where the UVC LED is located to be parallel to each other;
and designing the branch where the second constant current diode is located and the branch where the UVA LED is located to be vertical to each other.
10. The constant-current deep ultraviolet LED device according to claim 9, wherein the fixing of the quartz glass at the designated position of the copper cup holder specifically comprises:
coating an anti-UV adhesive on the copper cup bracket by using a high-precision dispenser;
and bonding the quartz glass lens at the step of the copper cup support, and sending the quartz glass lens into an oven to cure the glue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010112840.2A CN111295010A (en) | 2020-02-24 | 2020-02-24 | Constant-current deep ultraviolet LED device and manufacturing method thereof |
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| CN202010112840.2A CN111295010A (en) | 2020-02-24 | 2020-02-24 | Constant-current deep ultraviolet LED device and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111864033A (en) * | 2020-08-17 | 2020-10-30 | 深圳市华而美电子有限公司 | Deep ultraviolet LED encapsulation module |
| CN111911822A (en) * | 2020-08-31 | 2020-11-10 | 济南冠鼎信息科技有限公司 | Miniature ultraviolet light source |
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| CN203104886U (en) * | 2013-01-09 | 2013-07-31 | 广州生亿光电科技有限公司 | LED driving module circuit based on CRD constant current diode |
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