CN111049384A - Low-power-consumption power conversion circuit for control panel - Google Patents
Low-power-consumption power conversion circuit for control panel Download PDFInfo
- Publication number
- CN111049384A CN111049384A CN201911415992.3A CN201911415992A CN111049384A CN 111049384 A CN111049384 A CN 111049384A CN 201911415992 A CN201911415992 A CN 201911415992A CN 111049384 A CN111049384 A CN 111049384A
- Authority
- CN
- China
- Prior art keywords
- power
- coupled
- conversion circuit
- control chip
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A low-power-consumption power conversion circuit for a control panel comprises a rectification module, a transformation module, an optical coupler and a control chip, wherein the rectification module receives an alternating current and outputs a first direct current power, the transformation module is provided with an input side and an output side, the transformation module receives the first direct current power and then performs voltage reduction conversion to output a second direct current power to a load, the optical coupler comprises a receiving side and a transmitting side, the optical coupler obtains the second direct current power from the receiving side and outputs a feedback signal from the transmitting side, the control chip comprises a drain end, a power end and a feedback end, the drain end is coupled with the input side of the transformation module, the power end is coupled with the output side of the transformation module, the feedback end is coupled with the transmitting side of the optical coupler to obtain the feedback signal related to the second direct current power, a working current of the control chip is adjusted according to the feedback signal so as to reduce a standby power consumption of the control chip.
Description
Technical Field
The present invention relates to a power conversion circuit, and more particularly, to a low power consumption power conversion circuit for a control panel
Background
Wall switches (In-wall switches), also known as control panels, are widely and abundantly present In a variety of fields and devices. With the development of the demand of electrical appliances and the trend of home intelligence, the intelligent control panel has gradually replaced the traditional control panel.
In the case of an intelligent control panel, an intelligent module needs to be arranged in the panel to provide the function of intelligent control. The power required by the intelligent module involves a technique of converting ac power of the commercial power into dc power. Conventional power conversion circuits are disclosed in, for example, U.S. patent publication nos. US7,375,994, US7,710,748, and US7,990,127.
The conventional power conversion circuit has the disadvantages of high standby power consumption, poor dynamic characteristics, and complex system, and needs to be improved.
Disclosure of Invention
The main purpose of the present invention is to solve the problems of high standby power consumption, poor dynamic characteristics, and complex system of the conventional power conversion circuit applied to the control panel.
To achieve the above object, the present invention provides a low power consumption power conversion circuit for a control panel, comprising: the rectifier module receives an alternating current and outputs a first direct current power; the transformation module is coupled to the rectification module and provided with an input side and an output side, the input side and the output side are coupled to the first direct current power, and the transformation module receives the first direct current power and then performs voltage reduction conversion to output second direct current power to a load from the output side; an optocoupler coupled between the transformer module and the load and including a receiving side coupled to the second dc power and a transmitting side, the optocoupler receiving the second dc power from the receiving side and outputting a feedback signal from the transmitting side according to the second dc power; and a control chip, including a drain terminal, a power end and a feedback end, the drain terminal is coupled to the input side of the voltage transformation module, the power end is coupled to the output side of the voltage transformation module, the feedback end is coupled to the emission side of the optical coupler, so as to obtain the feedback signal related to the second direct current power from the optical coupler, a working current of the control chip is adjusted according to the feedback signal, so as to reduce a standby power consumption of the control chip.
In one embodiment, the control chip further has a sampling terminal, and the sampling terminal obtains the second dc power through a sampling resistor.
In one embodiment, the output side of the transformer module is connected in parallel with a capacitor.
In one embodiment, the voltage of the second dc power is between 2.5V and 5V.
In one embodiment, the transformer module further includes at least one diode coupled to the output side for regulating the second dc power.
In one embodiment, the output side of the transformer module includes a secondary winding coupled to the load and an auxiliary winding coupled to the power terminal of the control chip.
In one embodiment, the transformer module further includes a first diode coupled to the secondary winding and a second diode coupled to the auxiliary winding.
In one embodiment, the receiving side of the optocoupler includes a first terminal coupled between the output side of the transformer module and the load and a second terminal coupled to a ground reference.
In one embodiment, the second end of the optical coupler is coupled to the alternating current between the second end of the optical coupler and the reference ground.
In one embodiment, when the second dc power is higher than a predetermined value, the second dc power is supplied to the control chip through the power source.
In the invention, the power supply end is coupled between the output side of the transformer module and the load, and when the transformer module is just started or the second direct current power is low, the JFET in the system is used as a power supply source of the control chip; when the second direct current power is started for a period of time or is higher than a certain value, the second direct current power is used as a power supply source of the control chip, so that the standby power consumption can be reduced; secondly, the power conversion circuit omits an alternating current-to-direct current converter or a direct current-to-direct current converter which is additionally arranged for supplying power to the control chip in the prior art; in addition, the working current of the control chip is adjusted according to the second direct current power, the working current of the control chip is adjusted by acquiring the change of the second direct current power in real time, so that the power conversion circuit has good dynamic characteristics, and when the second direct current power changes, the control chip can respond in real time; by means of the arrangement of the optical coupler, real-time monitoring under power isolation is achieved.
Drawings
Fig. 1 is a circuit architecture diagram according to an embodiment of the invention.
Fig. 2 is a circuit architecture diagram of another embodiment of the present invention.
Detailed Description
The detailed description and technical contents of the present invention will now be described with reference to the drawings as follows:
the invention discloses a low-power consumption power conversion circuit applied to a control panel, wherein the coupling of two or more components can be direct electrical connection between the components or electrical connection formed by other components between the components. Fig. 1 is a schematic circuit architecture diagram according to an embodiment of the present invention, which includes a rectifier module 10, a transformer module 20, a control chip 30, and an optical coupler 40.
The rectifying module 10 includes a rectifying unit 11 and an input capacitor 12 coupled to the rectifying unit 11, the rectifying module 10 may be a bridge rectifier as shown in fig. 1, the rectifying module 10 receives an alternating current AC and outputs a first direct current DC1, the transforming module 20 is coupled to the rectifying module 10, the transforming module 20 includes a transforming unit 21, an output capacitor 22, a first secondary diode 23 and a second diode 24, the transforming unit 21 includes an input side and an output side, the input side has a primary winding 21a, the output side includes a secondary winding 21b and an auxiliary winding 21c, the output capacitor 22 is connected in parallel with the secondary winding 21b, the first secondary diode 23 is connected in series between the secondary winding 21b and the output capacitor 22, the second diode 24 is connected in series with the auxiliary winding 21c, and the second diode 24 is further connected in series with a resistor 25. The primary winding 21a receives the first DC power DC1 and then performs buck conversion to output a second DC power DC2 from the output capacitor 22 to a load 50, and the first diode 23 and the second diode 24 can regulate the output voltage at the output side.
The control chip 30 includes a drain terminal 31, a power terminal 32, a feedback terminal 33, a sampling terminal 34 and a ground terminal 35, the drain terminal 31 is coupled to the input side of the transformer unit 21, a common node N is formed between the power terminal 32 and the auxiliary winding 21c and the optical coupler 40, and thus the common node N is coupled between the output side of the transformer unit 21 and the load 50 through the optical coupler 40, so that the control chip 30 can be powered through the second DC power DC 2. The feedback terminal 33 is coupled to the optocoupler 40, and obtains the second DC power DC2 from between the output side of the transformer unit 21 and the load 50, and an operating current of the control chip 30 is adjusted according to the second DC power DC2, so as to reduce a standby power consumption of the control chip 30. In the present embodiment, a resistor 36 and a capacitor 37 are connected in parallel between the feedback end 33 and the ground end 35 of the control chip 30, a sampling resistor 38 is coupled to the sampling end 34 of the control chip 30 to sample the second DC power DC2, and the voltage value of the second DC power is between 2.5V and 5V.
The optocoupler 40 includes a receiving side 40a and a transmitting side 40b, a first node N1 is formed between the transformer module 20 and the load 50, the receiving side 40a includes a first terminal 401a and a second terminal 401a, the first terminal 401 is coupled to the first node N1 to receive the second DC power DC2, the second terminal 401a is connected to a ground reference, and the receiving side 40a is connected in parallel with a resistor 41. A first terminal 401b of the transmitting side 40b is coupled to the common node N, a second terminal 402b of the transmitting side 40b is coupled to the feedback terminal 33, and the optocoupler 40 obtains the second DC power DC2 from the receiving side 40a and outputs a feedback signal from the transmitting side 40b to the feedback terminal 33 according to the second DC power DC 2. In this embodiment, the emitting side 40b of the optocoupler 40 is further connected in series with a clamping diode 60 and a resistor 61. By the arrangement of the optical coupler 40, real-time monitoring under power isolation is realized.
Referring to fig. 2, a circuit architecture diagram of another embodiment of the present invention is shown, compared to the embodiment of fig. 1, in this embodiment, a second node N2 is formed between the second end 401a of the receiving side 40a of the optocoupler 40 and the ground reference, and the second node N2 is coupled back to the alternating current AC.
According to an embodiment of the present invention, when the power-on device is started, the JFET in the circuit of the control panel supplies power to the control chip 30, after the power-on device is powered on, the second DC power DC2 gradually rises, once the power-on device rises to a threshold value, the JFET is turned off, the control chip 30 is supplied with power by the second DC power DC2, when the power-on device is in overload or short-circuit protection, the second DC power DC2 falls, and the power-on device is switched to supply power to the control chip 30 by the JFET, at this time, the power supply voltage of the JFET is less than the second DC power DC2 in a normal state; when the overload or short-circuit protection is released, the second direct current power DC2 rises, the second direct current power DC2 is switched to supply power to the constant voltage control chip 20, and the JFET is switched off to supply power, so that the standby power consumption is reduced. According to an embodiment of the invention, the second direct current power DC2 is between 3.3V and 5.5V, and the standby power consumption of the low power consumption power conversion circuit of the invention may be lower than 1.5 mW.
In the invention, the power supply end is coupled between the output side of the transformer module and the load, and when the transformer module is just started or the second direct current power is low, the JFET in the system is used as a power supply source of the control chip; when the second direct current power is started for a period of time or is higher than a certain value, the second direct current power is used as a power supply source of the control chip, so that the standby power consumption can be reduced; secondly, the power conversion circuit omits an alternating current-to-direct current converter or a direct current-to-direct current converter which is additionally arranged for supplying power to the control chip in the prior art; in addition, the working current of the control chip is adjusted according to the second direct current power, the working current of the control chip is adjusted by acquiring the change of the second direct current power in real time, so that the power conversion circuit has good dynamic characteristics, and when the second direct current power changes, the control chip can respond in real time; by means of the arrangement of the optical coupler, real-time monitoring under power isolation is achieved.
Claims (10)
1. A low power consumption power conversion circuit for a control panel, comprising:
the rectifier module receives an alternating current and outputs a first direct current power;
the transformation module is coupled to the rectification module and provided with an input side and an output side, the input side and the output side are coupled to the first direct current power, and the transformation module receives the first direct current power and then performs voltage reduction conversion to output second direct current power to a load from the output side;
an optocoupler coupled between the transformer module and the load and including a receiving side coupled to the second dc power and a transmitting side, the optocoupler receiving the second dc power from the receiving side and outputting a feedback signal from the transmitting side according to the second dc power; and
the control chip comprises a drain end, a power end and a feedback end, wherein the drain end is coupled with the input side of the transformation module, the power end is coupled with the output side of the transformation module, the feedback end is coupled with the transmitting side of the optical coupler so as to obtain the feedback signal related to the second direct current power from the optical coupler, and a working current of the control chip is adjusted according to the feedback signal so as to reduce standby power consumption of the control chip.
2. The low power consumption power conversion circuit of claim 1, wherein the control chip further comprises a sampling terminal, and the sampling terminal obtains the second dc power through a sampling resistor.
3. The low power consumption power conversion circuit of claim 1, wherein a capacitor is connected in parallel to the output side of the transformer module.
4. The low power consumption power conversion circuit of claim 1, wherein the voltage of the second dc power is between 2.5V and 5V.
5. The low power consumption power conversion circuit of claim 1, wherein the transforming module further comprises at least one diode coupled to the output side for regulating the second dc power.
6. The low power consumption power conversion circuit according to claim 1, wherein the output side of the transformer module includes a secondary winding coupled to the load and an auxiliary winding coupled to the power terminal of the control chip.
7. The low power consumption power conversion circuit of claim 6, wherein the transformer module further comprises a first diode coupled to the secondary winding and a second diode coupled to the auxiliary winding.
8. The low power consumption power conversion circuit of claim 7, wherein the receiving side of the optocoupler includes a first terminal coupled between the output side of the transformer module and the load and a second terminal coupled to a ground reference.
9. The low power consumption power conversion circuit of claim 8, wherein the alternating current is coupled between the second terminal of the optocoupler and the reference ground.
10. The low power consumption power conversion circuit according to claim 1, wherein the second dc power is supplied to the control chip via the power source terminal when the second dc power is higher than a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415992.3A CN111049384A (en) | 2019-12-31 | 2019-12-31 | Low-power-consumption power conversion circuit for control panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415992.3A CN111049384A (en) | 2019-12-31 | 2019-12-31 | Low-power-consumption power conversion circuit for control panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111049384A true CN111049384A (en) | 2020-04-21 |
Family
ID=70242626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911415992.3A Pending CN111049384A (en) | 2019-12-31 | 2019-12-31 | Low-power-consumption power conversion circuit for control panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111049384A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904567A (en) * | 2021-05-12 | 2022-01-07 | 无锡猎金半导体有限公司 | AC-DC control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070081364A1 (en) * | 2005-10-11 | 2007-04-12 | Texas Instruments Incorporated | Highly efficient isolated AC/DC power conversion technique |
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN101924482A (en) * | 2009-05-28 | 2010-12-22 | 成都芯源系统有限公司 | Power integrated circuit for power converter and manufacturing method |
| CN201985762U (en) * | 2011-01-15 | 2011-09-21 | 青岛海信电器股份有限公司 | Zero power consumption standby circuit and electrical appliance equipment comprising the same |
| CN103023298A (en) * | 2013-01-04 | 2013-04-03 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC (alternating current to digital current) switching mode power converter |
| CN110134026A (en) * | 2019-06-06 | 2019-08-16 | 上海晶丰明源半导体股份有限公司 | A kind of low power consumpting controling circuit for intelligent appliance |
-
2019
- 2019-12-31 CN CN201911415992.3A patent/CN111049384A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070081364A1 (en) * | 2005-10-11 | 2007-04-12 | Texas Instruments Incorporated | Highly efficient isolated AC/DC power conversion technique |
| CN101924482A (en) * | 2009-05-28 | 2010-12-22 | 成都芯源系统有限公司 | Power integrated circuit for power converter and manufacturing method |
| CN101765274A (en) * | 2010-01-29 | 2010-06-30 | 海洋王照明科技股份有限公司 | LED lamp and drive circuit |
| CN201985762U (en) * | 2011-01-15 | 2011-09-21 | 青岛海信电器股份有限公司 | Zero power consumption standby circuit and electrical appliance equipment comprising the same |
| CN103023298A (en) * | 2013-01-04 | 2013-04-03 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC (alternating current to digital current) switching mode power converter |
| CN110134026A (en) * | 2019-06-06 | 2019-08-16 | 上海晶丰明源半导体股份有限公司 | A kind of low power consumpting controling circuit for intelligent appliance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904567A (en) * | 2021-05-12 | 2022-01-07 | 无锡猎金半导体有限公司 | AC-DC control method |
| CN113904567B (en) * | 2021-05-12 | 2023-11-07 | 江苏芯潭微电子有限公司 | AC-DC control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI477051B (en) | Flyback converter with primary side and secondary side control and method for the same | |
| RU2308143C1 (en) | Power supply with two inputs for alternating and direct current with programmable constant current output, using a secondary reducing transformer | |
| US7856566B2 (en) | Standby arrangement for power supplies | |
| US8358517B2 (en) | Switching power conversion circuit and power supply using same | |
| CN108631601B (en) | Multi-input converter | |
| US10171074B2 (en) | Electronic system | |
| US9331565B2 (en) | Switching power conversion circuit and power supply using same | |
| CN104467437A (en) | Low stand-by power consumption switching power supply | |
| CN104052297A (en) | Methods And Systems For Improving Load Transient Response In Llc Converters | |
| CN110099234B (en) | Power supply starting device and television | |
| CN101635513B (en) | Stand-by circuit | |
| CN104578796A (en) | Power supply device | |
| CN110572044A (en) | Power control circuit and electrical equipment | |
| CN111541361B (en) | Synchronous rectification isolation driving circuit and synchronous rectification isolation power supply system | |
| CN111049384A (en) | Low-power-consumption power conversion circuit for control panel | |
| CN112671214A (en) | Control circuit and power supply conversion system and control method thereof | |
| CN111614275B (en) | Power supply conversion device | |
| EP0749199A1 (en) | Power supply for an appliance having an operating mode and a stand-by mode | |
| US10992152B2 (en) | Uninterruptible power supply and method of operating the same | |
| WO2015139337A1 (en) | Standby power consumption control circuit and method | |
| KR20150008205A (en) | Power supplying apparatus | |
| CN111200294B (en) | High-frequency bidirectional photovoltaic energy inversion energy storage system | |
| KR101442013B1 (en) | Tester for power supply converter | |
| CN111082675A (en) | Low-power-consumption power conversion circuit for control panel | |
| CN216390792U (en) | Starting circuit, power supply circuit and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200421 |
|
| RJ01 | Rejection of invention patent application after publication |