CN1215248A - Harmonic current attenuator for electric motor - Google Patents
Harmonic current attenuator for electric motor Download PDFInfo
- Publication number
- CN1215248A CN1215248A CN98121342A CN98121342A CN1215248A CN 1215248 A CN1215248 A CN 1215248A CN 98121342 A CN98121342 A CN 98121342A CN 98121342 A CN98121342 A CN 98121342A CN 1215248 A CN1215248 A CN 1215248A
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- CN
- China
- Prior art keywords
- motor
- power
- harmonic current
- supply unit
- phase control
- 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.)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/10—Commutator motors, e.g. repulsion motors
- H02P25/14—Universal motors
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
A harmonic current attenuator of a motor controls the phase of a sine wave AC power supplied to the motor by a power supply means to adjust the revolution of the motor and has a harmonic current attenuating means which attenuates a harmonic current produced in the phase control of the AC power supply. The harmonic current attenuator further includes an operating means which selects a phase control mode or a high strength mode in accordance with an operation by a user and a switching means which supplies the AC power supplied by the power supply means to the motor through the harmonic current attenuating means if the phase control mode is selected and supplies the AC power supplied by the power supply means directly to the motor if the high strength mode is selected.
Description
The present invention relates to a kind of harmonic current attenuation device of motor, its decay is when motor is driven and the harmonic current that produces is output as maximum so as to making motor.
As shown in Figure 1, conventional motor-drive circuit in cleaner comprises supply unit 10, be used to provide AC power with mains frequency, filter 12, the noise that is used for the AC power that filtering provides by supply unit 10, the motor 30 that the AC power that is provided by supply unit 10 drives, phase control device 32, be used for carrying out phase control to the AC power that motor 30 provides by supply unit 10, slide switch 34, be used for motor 30 being driven or not driving according to user's operation, and be used to control the rotating speed of motor 30, and TRIAC (triode AC switch), be used for connecting, thereby the AC power that subtend motor 30 provides is carried out phase control by means of the control of phase control device 32.
In addition, slide switch (34) comprises switch (SW), choke (L) and variable resistor (VR).The contact of switch (SW) (a, b) operation according to the user is switched on or switched off, so as to providing power supply to motor (30) by supply unit (10), and according to the speed of the slide potentiometer value control motor (30) that changes by variable resistor (VR).At this moment, choke (L) is used for filtering when the slide potentiometer value changes and the high fdrequency component that produces.
The operating process of conventional cleaner is elaborated with reference to Fig. 1.At first, (a b) connects, so that provide AC power by choke (L) and variable resistor (VR) to phase control device 32 to make the contact of switch (SW) by operation slide switch 34.At this moment, the noise that comprises of filter (12) AC power that is used for filtering and provides to motor (30).
Then, make the DIAC conducting in phase control device (32) and end, make that the operation by means of DIAC makes the TRIAC conversion, thereby the AC power that subtend motor 30 provides is carried out phase control by means of AC power by filter (12) filtering.
At this moment, motor 30 is driven by the AC power that TRIAC provides by supply unit (10).The compressor reducer forced circulation of the collaborative rotation of inner air quilt and motor, for example dirt such as dust just sucks from the wind that suction inlet is produced by the pressure differential between cleaner is inside and outside, so just finishes clean operation.
Wherein, the waveform that offers the voltage (V) of motor (30) and electric current (I) as shown in Figure 2.On the other hand, the conducting of the DIAC by changing phased device (32) or cut-off state make the TRIAC conversion.The mains frequency sine voltage that provides from supply unit (10) is carried out phase control and converts the non-sinusoidal waveform voltage that offers motor (30) to, thereby produces harmonic frequency.
Along with the increase of product in electric power system of for example cleaner and so on, the total amount of the harmonic current that draws from power-supply system increases greatly, causes the operation disorder of power capacitor, brake and so on, causes transformer to puncture.
In order to stop the interference that is caused by harmonic current as mentioned above, International Electrotechnical Commission (IEC) (IEC) has set up the standard of restriction harmonic current.According to this standard, the various harmonic currents that produce in the cleaner are to provide when the phase place of the AC power of supplying with motor is controlled in 90 ° ± 10 °, and mainly are triple harmonic current, as shown in Figure 3.
Thereby urgent problem is the decay triple harmonic current so that satisfy the standard of restriction harmonic current.In the various technical fields relevant, carried out many researchs for the technology of decay triple harmonic current with cleaner.
As shown in Figure 4, a kind of technology of the triple harmonic current that is used to decay is 1997,8,25 have proposed patent application at korean industrial property office, and name is called " harmonic current attenuating device ofa motor " (harmonic current attenuation device of motor).According to this device, the AC power of the mains frequency that is provided by supply unit (10) utilizes TRIAC to carry out conversion and phase control and the non-sinusoidal waveform of supplying with motor (30) that becomes.Owing to the AC power of supplying with motor (30) being carried out phase place that phase control produces is that 90 ° ± 10 ° harmonic current is by reactor (20, be called humorous wave transformer later on), the decay of a kind of resistive element, so as to realizing the decay of triple harmonic current.
Yet, motor harmonic current attenuation device shown in Figure 4 exists problem, promptly, under for the phase control mode of decaying and the harmonic current that produces and provide under the situation of AC power to motor by humorous wave transformer at motor, even when motor is driven under the full power operation mode without phase control, also cause the voltage drop of AC power as the humorous wave transformer of resistive element work, thereby, on a predetermined value (for example about 1400W), limit the output of motor, therefore reduced inhalation power.
In order to address the above problem, the present invention has been proposed, thereby the object of the present invention is to provide a kind of attenuating device of harmonic current of motor, it is under phase control mode, by humorous wave transformer attenuating harmonic wave currents effectively, and under the full power operation mode, by directly the AC power from supply unit being supplied with the output that motor improves motor in fact without phase control.
In order to realize above-mentioned purpose of the present invention, a kind of harmonic current attenuation device of motor is provided, it is by phase control control rotating speed of motor is provided the AC power source of sine wave that is provided by supply unit, and by means of harmonic current attenuation device decay under the phase control mode of AC power and the harmonic current that produces, wherein said device comprises:
Operating means is used for selecting phase control mode or full power operation mode according to user's operation; And
Conversion equipment, be used for when selecting phase control mode by mode of operation, provide the AC power of supplying with by supply unit by harmonic current attenuation device to motor, when selecting the full power operation mode, then directly provide the AC power of exporting by supply unit to motor.
For the ease of understanding character of the present invention and purpose more fully, the present invention will be described in detail with reference to the accompanying drawings for the general, wherein:
Fig. 1 is the schematic diagram that is used for illustrating according to the motor-drive circuit of the general cleaner of prior art;
Fig. 2 and Fig. 3 illustrate the harmonic current that the general motor of prior art produces;
Fig. 4 explanation has the motor-drive circuit of the humorous wave transformer that is used for attenuating harmonic wave currents according to prior art;
Fig. 5 explanation is according to the motor harmonic current attenuation device of the first embodiment of the present invention;
Fig. 6 explanation is according to the motor harmonic current attenuation device of the second embodiment of the present invention;
Fig. 7 explanation is according to the motor harmonic current attenuation device of the third embodiment of the present invention; And
Fig. 8 explanation is according to the output of motor of the present invention.
Describe most preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.In institute's drawings attached, for convenience of description for the purpose of, represent parts or part identical or equivalence with identical label, and omit unnecessary explanation.
Represent harmonic current attenuation device among Fig. 5, Fig. 6 and Fig. 4 contrastively, each embodiment of the present invention comprises: go up the contact (b) that forms at slide switch (34), it is corresponding to the full power operation mode of motor; And switching device (21), be used for as contact (a, when b) being switched on or switched off, selectively provide the AC power of supplying with by supply unit (10) by humorous wave transformer (20) to motor (30) corresponding to the full power operation mode that is provided with at slide switch (34) by the operator.
Wherein, shown in the first embodiment of the present invention, switching device is microswitch (22), be used for contact (a when slide switch (34), b) be changed when being switched on or switched off, (h i), can supply with motor (30) or directly supply with motor (30) so as to making the AC power of being supplied with by supply unit (10) changeover contact by humorous wave transformer (20).
In addition, at the switching device shown in the second embodiment of the present invention (21) is second TRIAC2 (24), be used for as contact (a at slide switch (34), b) become when being switched on or switched off, make the AC power that provides by supply unit (10) supply with motor (30), or directly supply with motor (30) by humorous wave transformer (20).
In addition, as shown in Figure 7, switching device (21) comprises device for charge/discharge (24), it has capacitor (C2) and resistance (R2), be used for contact (a by slide switch (34), b) receive AC power from supply unit (10), carry out charge or discharge then, the 2nd DIAC2, it is according to the voltage turn-on that provides by device for charge/discharge (24) or end, the 2nd TRIAC2 is used for when the 2nd DIAC2 is activated, and directly the AC power that is provided by supply unit (10) is supplied with motor (30), so as to according to the contact (a in slide switch (34), b) be switched on or switched off, make the AC power that provides by supply unit (10) directly supply with motor (30), perhaps make by a TRIAC1 and supply with motor (30) by humorous wave transformer (20) by the AC power that supply unit (10) provides.
Describe operating process in detail below with reference to Fig. 5 and Fig. 8 according to the harmonic current attenuation device of the first embodiment of the present invention.Microswitch (22) is set to disconnect under its initial condition.
At first, make contact (c f) links to each other with the contact (a) of switch (SW) respectively, the then filtered device of AC power (12) filtering that is provided by supply unit (10), and be supplied to phase control device (32) if operate slide switch (34) by the operator.At this moment, the noise that is included in the AC power passes through filter unit (12) by filtering, and the DIAC that makes phase control device (32) is switched on or switched off the AC power of filtering, so as to conversion TRIAC, the AC power that be provided for motor is carried out phase control.
Thereby the AC power of carrying out phase control by TRIAC, is supplied with motor (30) then it is driven so as to the harmonic current that decay produces under phase control mode by humorous wave transformer (20).
Therefore, by means of and the compressor reducer of the collaborative rotation of motor (30) force the inner air circulation, for example dirt such as dust just sucks from the wind that suction inlet is produced by the pressure differential between cleaner is inside and outside.
At this moment, (c f) links to each other with contact (a), so according to user's operation, utilize the speed of the resistance value control motor (30) of variable resistor (VR) because the contact of switch (SW).
On the other hand, when contact (b, e) with switch (34) in contact (a) when linking to each other (t among Fig. 8), (h i) interconnects the contact of microswitch (22).
Therefore, the AC power that provides by TRIAC is not directly sent by harmonic wave transformer (20) by microswitch (22).If motor (30) is driven under the full power operation mode, then can not cause the voltage drop of AC power, thereby the output of motor (30) is increased to more than the 1600W, as shown in Figure 8 by humorous wave transformer (20) as resistive element.
Describe operating process in detail below with reference to Fig. 6 and Fig. 8 according to the harmonic current attenuation device of the second embodiment of the present invention.The 2nd TRIAC2 is set to end under its initial condition.
At first, when operate by the operator contact that slide switch (34) makes switch (SW) (c, f) respectively with the contact (a) of switch (SW) when linking to each other, then provide AC power to motor (30) by supply unit (10).At this moment, the noise that is included in the AC power passes through filter unit (12) by filtering, and the DIAC of phase control device (32) is switched on or switched off, and so as to changing a TRIAC1, the AC power that be provided for motor (30) is carried out phase control.
Thereby the AC power of carrying out phase control by a TRIAC1, is supplied with motor (30) then it is driven so as to the harmonic current that decay produces under phase control mode by humorous wave transformer (20).
Therefore, by means of and the compressor reducer of the collaborative rotation of motor (30) force the inner air circulation, for example dirt such as dust just sucks from the wind that suction inlet is produced by the pressure differential between cleaner is inside and outside.
At this moment, (c f) links to each other with contact (a) at the switch (SW) of slide switch (34), so can utilize the speed of the resistance value control motor (30) of variable resistor (VR) according to user's operation because contact.
On the other hand, when contact (b e) links to each other (t among Fig. 8) with contact (a) in the slide switch (34), thus under the full power operation mode operating electrical machines and when motor (30) not being carried out phase control, the 2nd TRIAC2 conducting.
Therefore, the AC power that provides by a TRIAC1 is not directly sent by harmonic wave transformer (20) by microswitch (22).If motor (30) is driven under the full power operation mode, then can not cause the voltage drop of AC power, thereby the output of motor (30) is increased to more than the 1600W, as shown in Figure 8 by humorous wave transformer (20) as resistive element.
Describe in detail according to the third embodiment of the present invention below with reference to Fig. 7 and Fig. 8.The 2nd TRIAC2 is set to end under its initial condition.
When contact (a, c) operation by slide switch (34) interconnects so that when controlling the phase place of AC power, the filtered device of AC power (12) filtering by supply unit (10) provides is provided for phase control device (32) then.Then, a DIAC1 conducting or end, then, a TRIAC1 makes the AC power that is provided by supply unit (10) is carried out phase control according to the operation conversion of a DIAC1.
In addition, the AC power of being carried out phase control by a TRIAC1 is by humorous wave transformer (20), and the harmonic current that produces during phase control is attenuated, and is provided for motor (30) then it is driven.
Then, by means of and the compressor reducer of the collaborative rotation of motor (30) force the inner air circulation, for example dirt such as dust just sucks from the wind that suction inlet is produced by the pressure differential between cleaner is inside and outside.
At this moment, (a is when c) interconnecting, by can control the speed of motor (30) according to the resistance value of user's operation change variable resistor (VR) when the contact in slide switch (34).
Simultaneously, as the contact (a in slide switch (34), b) interconnect (t among Fig. 8), thereby operating electrical machines under the full power operation mode (30) and when it not being carried out phase control, AC power is sent to the control utmost point of the 2nd TRIAC2 by device for charge/discharge (24) and the 2nd DIAC2, so as to making the 2nd TRIAC2 conducting.
Then, the AC power from supply unit (10) is not directly offered motor (30) by harmonic wave transformer (20).If motor (30) is driven under the full power operation mode, then AC power can not reduce its voltage, thereby the output of motor (30) is increased to more than the 1600W, as shown in Figure 8.
At this moment, owing to used device for charge/discharge 24 and the 2nd DIAC, so can stop the misoperation that causes by the external power source noise of the 2nd TRIAC2.
Specifically, manually controlling under the situation of cleaner with the slide switch (34) that is attached on the cleaner housing, owing to exist the external power source noise to cause the problem of the 2nd TRIAC2 misoperation.Yet, utilized device for charge/discharge (24) and the 2nd DIAC2 here, thereby stoped the misoperation of the 2nd TRIAC2.
As seen by above-mentioned, the advantage of motor harmonic current attenuation device of the present invention is, in phase controlling Under the mode, by humorous wave transformer attenuating harmonic wave currents effectively, under the full power operation mode, by The AC power that is provided by supply unit is directly supplied with motor and do not carry out phase controlling, greatly improve electricity The output of machine.
Claims (4)
1, a kind of harmonic current attenuation device of motor, it is by phase control control rotating speed of motor is provided the AC power source of sine wave that is provided by supply unit, and by means of harmonic current attenuation device decay under the phase control mode of AC power and the harmonic current that produces is characterized in that described device comprises:
Operating means is used for selecting phase control mode or full power operation mode according to user's operation; And
Conversion equipment, be used for when selecting phase control mode by mode of operation, provide the AC power of supplying with by supply unit by harmonic current attenuation device to motor, when selecting the full power operation mode, then directly provide the AC power of exporting by supply unit to motor.
2, device as claimed in claim 1, it is characterized in that conversion equipment is a microswitch, be used for changing by the mode of selecting according to operating means, the feasible AC power that is provided by supply unit is supplied with motor or is not directly supplied with motor by harmonic current attenuation device by harmonic current attenuation device.
3, device as claimed in claim 1, it is characterized in that conversion equipment is TRIAC, be used for changing by the mode of selecting according to operating means, the feasible AC power that is provided by supply unit is supplied with motor or is not directly supplied with motor by harmonic current attenuation device by harmonic current attenuation device.
4, device as claimed in claim 1 is characterized in that conversion equipment comprises:
Device for charge/discharge is used for when selecting the full power operation mode by operating means, by the alternating current power supply charging or the discharge that are provided by supply unit;
DIAC, it is by the voltage turn-on that provides through device for charge/discharge or end; And
TRIAC is used for when the DIAC conducting, the AC power that is provided by supply unit is not directly supplied with motor by harmonic current attenuation device.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR53073/97 | 1997-10-16 | ||
| KR53073/1997 | 1997-10-16 | ||
| KR19970053073 | 1997-10-16 | ||
| KR30224/1998 | 1998-07-27 | ||
| KR30224/98 | 1998-07-27 | ||
| KR1019980030224A KR100304800B1 (en) | 1997-10-16 | 1998-07-27 | Apparatus for attenuating harmonic current of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1215248A true CN1215248A (en) | 1999-04-28 |
| CN1065374C CN1065374C (en) | 2001-05-02 |
Family
ID=26633127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98121342A Expired - Fee Related CN1065374C (en) | 1997-10-16 | 1998-10-12 | Harmonic current attenuator for electric motor |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPH11196596A (en) |
| CN (1) | CN1065374C (en) |
| CH (1) | CH689503A5 (en) |
| DE (1) | DE19847639A1 (en) |
| FR (1) | FR2770051B1 (en) |
| GB (1) | GB2330462B (en) |
| IT (1) | IT1302373B1 (en) |
| NL (1) | NL1010328C2 (en) |
| SE (1) | SE519789C2 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE363941B (en) * | 1971-12-28 | 1974-02-04 | Electrolux Ab | |
| DE3423218A1 (en) * | 1984-06-22 | 1986-01-02 | Gebrüder Merten GmbH & Co KG, 5270 Gummersbach | Electrical installation apparatus, such as a rotation speed controller or brightness controller, having a circuit arrangement for reducing the heat losses |
| WO1990009701A1 (en) * | 1989-02-07 | 1990-08-23 | Siemens Aktiengesellschaft | Process and device for controlling single-phase or multiphase a.c. controllers |
| FR2671930B1 (en) * | 1991-01-21 | 1993-04-16 | Legrand Sa | CURRENT DIMMER FOR POWER LOAD, WITH REDUCED FILTER LOSSES. |
| FR2726405B1 (en) * | 1994-10-26 | 1996-11-29 | Moulinex Sa | METHOD AND DEVICE FOR CONTROLLING THE POWER OF A LOAD VIA A PHASE ADJUSTABLE SYSTEM |
| JPH1049240A (en) * | 1996-05-28 | 1998-02-20 | Matsushita Electric Works Ltd | Power consumption control circuit |
| US5883490A (en) * | 1996-06-14 | 1999-03-16 | Moreira; Julio C. | Electric motor controller and method |
| FR2757708B1 (en) * | 1996-12-23 | 1999-01-29 | Schneider Electric Sa | ELECTRICAL APPARATUS COMPRISING A LOAD CONTROL DEVICE |
-
1998
- 1998-10-12 GB GB9822072A patent/GB2330462B/en not_active Expired - Fee Related
- 1998-10-12 CN CN98121342A patent/CN1065374C/en not_active Expired - Fee Related
- 1998-10-14 IT IT1998RM000645A patent/IT1302373B1/en active IP Right Grant
- 1998-10-15 SE SE9803523A patent/SE519789C2/en not_active IP Right Cessation
- 1998-10-15 DE DE19847639A patent/DE19847639A1/en not_active Ceased
- 1998-10-15 FR FR9812951A patent/FR2770051B1/en not_active Expired - Fee Related
- 1998-10-15 NL NL1010328A patent/NL1010328C2/en not_active IP Right Cessation
- 1998-10-15 JP JP10294260A patent/JPH11196596A/en active Pending
- 1998-10-16 CH CH02093/98A patent/CH689503A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL1010328C2 (en) | 2004-05-11 |
| ITRM980645A1 (en) | 2000-04-14 |
| JPH11196596A (en) | 1999-07-21 |
| FR2770051B1 (en) | 2001-05-25 |
| IT1302373B1 (en) | 2000-09-05 |
| CH689503A5 (en) | 1999-05-14 |
| GB2330462B (en) | 1999-12-01 |
| SE9803523L (en) | 1999-04-17 |
| DE19847639A1 (en) | 1999-04-22 |
| GB9822072D0 (en) | 1998-12-02 |
| CN1065374C (en) | 2001-05-02 |
| GB2330462A (en) | 1999-04-21 |
| SE9803523D0 (en) | 1998-10-15 |
| FR2770051A1 (en) | 1999-04-23 |
| NL1010328A1 (en) | 1999-04-19 |
| SE519789C2 (en) | 2003-04-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Samsung Kwangiu Electronics Co., Ltd. Applicant before: Kwangju Electronics Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: KWANGJU ELECTRONICS CO., LTD. TO: SAMSUNG GWANGJU ELECTRONICS CO. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |