GB2300319A - TV receivers - Google Patents
TV receivers Download PDFInfo
- Publication number
- GB2300319A GB2300319A GB9608418A GB9608418A GB2300319A GB 2300319 A GB2300319 A GB 2300319A GB 9608418 A GB9608418 A GB 9608418A GB 9608418 A GB9608418 A GB 9608418A GB 2300319 A GB2300319 A GB 2300319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- high band
- outputted
- unit
- accordance
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
Description
1 1 2300319 AUTOMATIC POWER SELECTION AND SUPPLY APPARATUS FOR MULTI-LOW
NOISE CONVERTER BLOCK The present invention relates to an automatic power selection and supply apparatus for a multilow noise converter block, and particularly to an improved automatic power selection and supply apparatus for a multi-low noise converter block which is capable of automatically selecting and supplying a proper electric power coinciding with the kind of a multi-low noise converter block (LNB) by recognizing an operation state of the LNB irrespective of kinds of the multi-LNB.
Conventionally, a low noise converter block is referred to a frequency down unit for lowering a relatively high frequency received from a satellite and inputting the lowered frequency to a broadcasting satellite (BS) tuner.
Referring to Fig. 1, the conventional multi-LNB for receiving a satellite broadcasting program includes a regulator 100 for supplying an electric power to each unit of the LNB in cooperation with an input voltage PIN, a low band voltage controlled oscillator (VCO) 110 for oscillating a low band oscillating signal by voltage supplied thereto from the input electric power PIN, a high band VCO 120 for oscillating a high 1 1 is band oscillating signal in cooperation with electric power supplied thereto from the regulator 100, a VCO selecting control unit 130 for controlling a selection of the low band VCO 110 or the high band VCO 120 in cooperation with the input electric power PIN, a VCO selection unit 140 for selecting the low band VCO 110 or the high band VCO 120 in accordance with a control of the VCO selecting control unit 130 and for outputting an oscillating signal oscillated by the selected low band VCO 110 or the high band VCO 120, a switching unit 160 for selectively outputting a broadcasting signal outputted from a probe 150 in accordance with a switching in cooperation with the input voltage PIN, an RF amplifier 170 for amplifying a broadcasting signal outputted from the switching unit 160 up to a high frequency, a mixer 18o for mixing a broadcasting signal amplified and outputted by the RF amplifier 170 and an oscillating signal outputted from the VCO selection unit 140, and an RF amplifier 190 for amplifying a broadcasting signal mixed and outputted by the mixer 180 and for outputting an amplified broadcasting signal RF.
The VCO selecting control unit 130 includes a low band VCO selection control unit (not shown) for controlling a selection of the low band VCO 110 in accordance with an input electric power PIN, and a high band VCO selection control unit (not shown) for controlling a selection of the high band VCO 120 in accordance with a frequency of 22KHZ contained in the input 2 is electric power PIN.
In addition, as shown in Fig. 2, the conventional multi-LNB power supply unit includes a microcomputer 200 for generating a control signal for selecting an electric power PIN which is supplied to the multi-LNB, a power supply unit 210 enabled in accordance with a control signal outputted from the microcomputer 200 for supplying an electric power having a predetermined level, a power selecting u-nit 220 for selectively outputting an electric power PIN to be supplied to the multi-LNB by lowering the voltage supplied from the power supply unit 210 in accordance with a control signal outputted from the microcomputer 200, a switching unit 230 for switching in accordance with a control of the microcomputer 200 and for containing a broadcasting signal outputted from the multi-LNB into an electric power lowered by the power selecting unit 220, and a video processing unit 240 for processing a broadcasting signal outputted from the switching unit 230 into a broadcasting signal CVBS for the television.
The video processing unit 240 includes an RF amplifier 241 for amplifying a broadcasting signal outputted from the switching unit 230 to a high frequency, a mixer 243 for mixing a broadcasting signal amplified by the RF amplifier 241 and an oscillating signal oscillated by the VCO 242, a video detector amplifier 244 for generating a base band signal by detecting and amplifying an intermediate frequency signal among broadcasting 3 is signals mixed by the mixer 243, and an intermediate frequency processing unit 245 for supplying a broadcasting signal CVBS to a television by de- emphasizing a base band signal generated by the video detector amplifier 244 and dispersing energy.
In the drawings, reference character D denotes a diode, and C denotes a condenser, and L denotes an inductance.
In addition, as shown in Fig. 3, another conventional multi-LNB electric power supply unit includes a microcomputer 300 for generating a control signal so as to selectively supply a high band frequency and voltage to the multi-LNE, a power supply unit 310 for supplying voltage having a predetermined level in accordance with a control signal outputted from the microcomputer 300, a power selecting unit 320 for lowering voltage supplied from the power supply unit 310 in accordance with a control signal generated by the microcomputer 300 and selectively outputting an electric power PIN to be supplied to the multi-LNB, a high band frequency generator 330 for generating a high band frequency having 22KEZ in accordance with a control signal outputted from the microcomputer 300, and a switching unit 340 for outputting a high band frequency generated by the high band frequency generator 330 in accordance with a control signal outputted from the microcomputer 300.
Here, in this conventional embodiment, the same elements as the TnultiLNB power supply unit of Fig. 2 are given the same reference numerals.
4 The operation of the f irst conventional multi-LNB power supply unit will now be explained with reference to Figs. 1 and 3.
To begin with, when a control signal for selecting an electric power to be supplied to the multi-LNB is generated and supplied to the power supply unit 210 and the power selecting unit 220, the power supply unit 210 is enabled in accordance with a control signal applied thereto, and outputs a voltage of about 20v to the power selecting unit 220.
The power selecting unit 220 lowers the voltage supplied thereto from the power supply unit 210 in accordance with a control signal outputted from the microcomputer 200.
That is, as shown in Fig. 2, when a control signal outputted from the microcomputer 200 has a form of 110,011, the power selecting unit 220 outputs a voltage of Ov (zero volt), and a control signal outputted from the microcomputer 200 has a form of 111,011, the power selecting unit 220 lowers the voltage of about 20v supplied threrto from the power supply unit 210, thereby outputting 14 volts.
In addition, when a control signal outputted from the microcomputer 200 has a form of 110,111, the power selecting unit 220 outputs 18 volts, and when a control signal outputted from the microcomputer 200 has a form of "1,1", the power selecting unit 220 outputs 16 volts.
Here, 14 volts and 18 volts outputted from the power selecting unit 220 are referred to a voltage for receiving polarized wave form signal, and 16 volts outputted from the same is referred to a voltage for receiving a circularly polarized ave form signal.
The electric power PIN outputted from the power selecting unit 220 is sequentially supplied to the regulator 100, the VCO selecting control unit 130, and the switching unit 160 as shown in Fig. 1 through the diode D, the condenser C, the inductance L, and a fixing terminal B of the switching unit 230.
The switching unit 160 is switched in accordance with an electric power PIN supplied threrto through the switching unit 230 and selectively outputs a broadcasting signal outputted from the probe 150.
The regulator 100 supplies electric power to the low band VCO 110, the high band VCO 120, the RF amplifiers 170 and 190, and the mixer 180 in accordance with an electric power PIN supplied threrto from the switching unit 230.
in addition, the low band VCO selection control unit and the high band VCO selection control unit of the VCO selecting control unit 130 is directed to recognizing an electric power PIN supplied threrto from the switching unit 230, and the VCO selection unit 140 is directed to selecting the low band VCO 110 or the high band VCO 120 in accordance with a control signal outputted from the VCO selecting control unit 130 and is directed to outputting an oscillating signal generated by the 6 selected low band VCO 110 or the high band VCO 120.
Meanwhile, the RF amplifier 170 amplifies the broadcasting signal outputted from the switching unit 160 to a high frequency, and the thusly amplified signal is mixed with an oscillating signal outputted from the mixer 180 and the VCO selection unit 140 and is applied to the RF amplifier 190.
Thereafter, the RF amplifier 190 amplifies a broadcasting signal outputted from the mixer 180 to a high frequency, and the thusly amplified signal is outputted to the fixing terminal A of the switching unit 230.
Therefore, the switching unit 230 is switched in accordance with a control signal outputted from the microcomputer 200, carries the broadcasting signal inputted to the fixing terminal A on voltage supplied to the fixing terminal B, and outputted to the RF amplifier 241 of the video processing unit 240.
Here, the broadcasting signal outputted from the RF amplifier 241 is referred to a signal which is down-converted.
The RF amplifier 241 amplifies a broadcasting signal outputted from the switching unit 230 to a high frequency, and the thusly amplified broadcasting signal is mixed with an oscillating signal oscillated by the VCO 242 and is applied to the video detector amplifier 244.
The video detector amplifier 244 detects an intermediate frequency signal among the broadcasting signal outputted from the mixer 243, amplifies the detected intermediate signal to a 7 predetermined level, and outputs a base band signal to the intermediate frequency (IF) processing unit 245The intermediate frequency (IF) processing unit 245 deemphasize the base band signal outputted from the video detector amplifier 244, and energydisperse the de-emphasized base band signal, and then outputs an energy d i spersed broadcasting signal CVBS to a video processing unit (not shown) of the television.
Meanwhile, the operation of the second conventional multiLNE power supply unit will now be explained.
To begin with, when the multi-LNB, as shown in Fig. 1, is used for a single band, since the operation of each element, the microcomputer 300, the power supply unit 310, and the power selecting unit 320 is the same as in the proceeding conventional embodiment, the operation of the same will now be omitted.
When the multi-LNB as shown in Fig. 1 is used for the dual band, the microcomputer 300 generates a control signal for using the multi-LNB for a dual band and outputs to the high band frequency generator 330 and the switching unit 340.
The high band frequency generator 330 generates a high band frequency of 22KHz in accordance with a control signal, and the switching unit 340 is turned on in accordance with a control signal outputted from the microcorputer 300 and outputs a frequency of 22KHz generated by the high band frequency generator 330.
The frequency of 22KHZ generated by the high band frequency 8 is generator 330 is carried on a voltage outputted fror the power selecting unit 320 and is applied to the VCO selecting control unit 130 of Fig. 1.
Thereafter, the high band VCO selection control unit of the VCO selecting control unit 130 controls the VCO selection unit 140 in cooperation with a frequency of 22KHz carried on the voltage outputted from the power selecting unit 320 and selects the high band VCO 120.
As the high band VCO 120 is selected, the oscillating signal is mixed with a broadcasting signal by the mixer 180, which is amplified by the RF amplifier 170 to a high frequency, and then down-converted by the RF amplifier 190, and is outputted to the video processing unit of the television.
However, the first conventional multi-LNB power supply unit is used for only a single band. That is, it is impossible to use the convention multiLNB power supply unit for a dual band, so that it is possible to widely use in the industry, and thus compatibility of products may become weakened.
In addition, however the another conventional multi-LNB power supply unit can be used for both a single band and a dual band, the selection whether a user uses the multi-LNE for a single band or a dual band, thus causing inconveniences.
9 is Accordingly, it is an object of the present invention to an automatic power selection and supply apparatus for a multi-low noise converter block, which overcomes the problems encountered in the conventional automatic power selection and supply apparatus for a multi-low noise converter block.
It is another object of the present invention to provide an automatic power selection and supply apparatus for a multi-low noise converter block, which is capable of automatically selecting a proper electric power coinciding with the kind of a multi-low noise converter block by recognizing an operation state of the LNB irrespective of kinds of the multi-LNS.
To achieve the above objects, there is provided an automatic power selection and supply apparatus for a multi-low noise converter block, which includes a synchronous signal detector for detecting a synchronous signal from a broadcasting signal which is inputted thereto after being video-processed; a current detector for detecting a current consumed by a high band VCO selection control unit of a multi-LNB and for outputting a detection signal in accordance with the detection; a comparator for comparing a detection signal outputted from the current detector with a previously set reference signal with and for outputting a comparison result signal in accordance with the comparison; a controller for generating a high band frequency generating control signal in accordance with a comparison result signal outputted from the comparator, and a detection signal h outputted from the synchronous signal detector; a high band frequency generating unit for generating a high band frequency in accordance with a high band frequency generating control signal outputted from the controller; and a switching unit for switching in accordance with a high band frequency generating control signal outputted from the controller and for supplying a high band frequency outputted from the high band frequency generating unit to the multi-LNB.
Fig. I is a block diagram of a conventional multi-LNE for receiving a satellite broadcasting signal; Fig. 2 is a block diagram of a f irst conventional multi-LNB power supply unit; Fig. 3 is a block diagram of a second conventional multi LNB power supply unit; Fig. 4 is a block diagram of an automatic power selection and supply apparatus for a multi-LNB according to the present invention; and Figs. 5A through 5E show wave forms of an input/output signal of each element of Fig. 4 according to the present invention 11 Referring to Fig. 4, an automatic power selection and supply apparatus for a multi-LNB according to the present invention includes a synchronizing signal detector 400 for detecting a synchronous signal from a broadcasting signal CVBS outputted from the video processing unit 240, a current detector 420 for detecting a consumption current of a high band VC0 selection control unit of a multi-LNB and for outputting a detection signal in accordance with the detection, a comparator 430 for comparing a detection signal outputted from the current detector 420 with a previously set reference signal and for outputting a comparison result signal in accordance with the comparison, a controller 410 for generating a high band generating control signal in accordance with a comparison result signal outputted from the comparator 430 and a detection signal outputted from the synchronizing signal detector 400, a high band frequency generating unit 440 for generating a high band frequency of 22KHz in accordance with a high band frequency generating control signal outputted from the controller 410, and a switching unit 450 for switching in accordance with a high band frequency generating control signal outputted from the controller 410 and for outputting a high band frequency outputted from the high band frequency generating unit 440.
In the drawings, reference numeral 460 denotes a microcomputer, and 470 denotes a power supply unit, and 480 denotes a power selecting unit.
12 is The operation of the automatic power selection and supply apparatus for a multi-low noise converter block according to the present invention will now be explained with reference to Figs. 4 and 5.
To begin with, when the multi-LNB works as a single band, the synchronizing signal detector 400 detects a synchronous signal from a broadcasting signal CVBS outputted from the video processing unit 240, and outputs a detection signal in accordance with the detection.
That is, as shown in Fig. 5D, when a synchronous signal is detected, a detection signal of a low level is outputted, and when the synchronizing signal is not detected, a detection signal of a high level is outputted.
Meanwhile, the current detector 420 detects a current consumption of the high band VCO selection control unit of the VCO selecting control unit 130 as shown in Fig. 1. Here, since the multi-LNB as shown in Fig. 1 works as a single band, the high band VCO selection control unit does not work, so the current detection unit can not detect a current.
Therefore, as the comparator 430 can not detect a current at the current detector 420, a comparison result signal of a low level as shown in Fig. 5C is outputted to the controller 410.
The controller 410 outputs a high band frequency generating control signal of a low level as shown in Fig. 5E to the high band frequency generating unit 440 and the switching unit 450, 13 3 respectively, irrespective of the level of a detection signal the synchronizing signal detector 400 in accordance with a comparison result signal of a low level outputted from the comparator 430.
Therefore, the high band frequency generating unit 440 is disabled in accordance with a high band frequency generating control unit of a low level outputted from the controller 410, and the switching unit 450 is turned off in accordance with a high band frequency generating control signal of a low level.
Meanwhile, when the multi-LNB works for a dual band, since the high band VCO selection control unit of the VCO selecting control unit 130 as shown in Fig. I works, the current detector 420 detects a consumption current in accordance with an operation of the high band VCO selection control unit, and outputs the detection signal to the comparator 430.
Therefore, the comparator 430 compares a detection signal outputted from the current detector 420 with a previously set reference signal, and outputs a comparison result signal of a high level as shown in Fig. 5C to the controller 410.
The controller 410 outputs a high band frequency generating control signal, as shown in Fig. SE, to the high band frequency generating unit 440 and the switching unit 450, respectively, in accordance with a detection signal of a high level outputted from the synchronizing signal detector 400 while the comparison result signal outputted from the comparator 430 maintains a high 14 level.
Therefore, the high band frequency generating unit 440 is enabled in accordance with a high band frequency generating control signal of a high level outputted from the controller 410, and outputs a high band frequency of 22KHz, and the switching unit 450 is turned on in accordance with a high band frequency generating control signal of a high level outputted from the controller 410, and outputs a high band frequency of 22KHz outputted from the high band frequency generating unit 440.
Meanwhile, the power selecting unit 480 selectively outputs 14 volts/18 volts or 16 volts in accordance with a control signal outputted from the microcomputer as shown in Figs. SA and 5B.
In addition, the controller 410 outputs a high band frequency generating control signal of a low level as shown in Fig. 5E by the dotted line to the high band frequency generating unit 440 and the switching unit 450, respectively, when a detection signal of a high level outputted from the synchronizing signal detector 400 as shown in Fig. 50 by the dotted line is applied thereto while the comparison result signal of a high level outputted from the comparator 430 as shown in Fig. 5C by he dotted line is maintained- Therefore, the high band frequency generating unit 440 and the switching unit 450 work as in the proceeding description.
Since a wave of 22KRZ of a high band frequency outputted from the switching 450 is carried on the output voltage of the power selecting unit 480 and supplied to the multi-LNB, the dual band LNB is automatically set.
As described above, the automatic power selection and supply apparatus for a multi-LNB according to the present invention is directed to automatically selecting an electric power to be supplied to the multi-LNB in accordance with the kind of the multi-LNB by detecting a consumption current of a high band VCO selection control unit of the multi-LNB and by detecting a synchronous signal from the broadcasting signal outputted from the video processing unit.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as described in the accompanying claims.
16
Claims (1)
- What is claimed is:1. An automatic power selection and supply apparatus for a multi-low noise converter block, comprising: synchronizing signal detector means for detecting a synchronizing signal from a broadcasting signal which is inputted thereto after being video-processed; current detector means for detecting a current consumed by a high band VCO selection control unit of a multi-LNB and for outputting a detection signal in accordance with the detection; comparator means for comparing a detection signal outputted from the current detector means with a previously set reference signal with and for outputting a comparison result signal in accordance with the comparison; controller means for generating a high band frequency generating control signal in accordance with a comparison result signal outputted from the comparator means, and a detection signal outputted from the synchronizing signal detector means; high band frequency generating means for generating a high band frequency in accordance with a high band frequency generating control signal outputted from the controller means; and switching means for switching in accordance with a hig.h band frequency generating control signal outputted from the controller means and for supplying a high band frequency 17 1 outputted from the high band frequency generating means to the multi-LNB.An automatic power selection and supply apparatus constructed and arranqed substantially as herein described with reference to or as shown in the accompanyinq drawinqs.18
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950009943A KR0141742B1 (en) | 1995-04-26 | 1995-04-26 | Multi-lnb power supply |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9608418D0 GB9608418D0 (en) | 1996-06-26 |
| GB2300319A true GB2300319A (en) | 1996-10-30 |
| GB2300319B GB2300319B (en) | 1997-07-30 |
Family
ID=19413002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9608418A Expired - Fee Related GB2300319B (en) | 1995-04-26 | 1996-04-24 | Automatic power selection and supply apparatus for multi-low noise converter block |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR0141742B1 (en) |
| DE (1) | DE19616779A1 (en) |
| GB (1) | GB2300319B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1723793A2 (en) * | 2004-03-09 | 2006-11-22 | THOMSON Licensing | Verifying 22khz tone operation in a set-top box |
| US7970341B2 (en) * | 2005-07-28 | 2011-06-28 | Thomson Licensing | Satellite LNB power supply adaptive load |
| US8078095B2 (en) | 2009-01-22 | 2011-12-13 | Avermedia Technologies, Inc. | Data communication system and data communication method |
| WO2012175705A1 (en) * | 2011-06-24 | 2012-12-27 | Thrane & Thrane A/S | Virtual n-band lnb |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149533A2 (en) * | 1984-01-13 | 1985-07-24 | Sony Corporation | Apparatus for receiving super high frequency signals |
| US5263182A (en) * | 1988-05-18 | 1993-11-16 | Samsung Electronics Co., Ltd. | Low-noise block converter for a satellite broadcasting system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487148A1 (en) * | 1980-07-18 | 1982-01-22 | Visiodis | AUTOMATIC TRANSMISSION SUBSTITUTION DEVICE FOR TELEVISION SIGNAL DISTRIBUTION STATION AT A CABLE NETWORK |
| AU584624B2 (en) * | 1984-08-31 | 1989-06-01 | Sony Corporation | Receiver device in a satellite communication system |
| FI87415C (en) * | 1990-06-08 | 1992-12-28 | Telenokia Oy | APPARATUS FOER DETEKTERING AV ETT FEL I EN FOERSTAERKARE SOM AER FOERDUBBLAD MED HETBEREDSKAPSMETODEN |
| JP2552030B2 (en) * | 1990-09-27 | 1996-11-06 | マスプロ電工株式会社 | Satellite signal receiver |
| GB9103713D0 (en) * | 1991-02-22 | 1991-04-10 | Amstrad Plc | Improvements relating to television systems |
| JP2788560B2 (en) * | 1991-07-10 | 1998-08-20 | 富士通株式会社 | Receiving satellite switching device |
| DE4316800C2 (en) * | 1993-05-19 | 1996-12-19 | Grundig Emv | Satellite receiver with a device for generating DC voltages with or without superimposed AC voltage for controlling the outdoor unit of a satellite reception system |
-
1995
- 1995-04-26 KR KR1019950009943A patent/KR0141742B1/en not_active IP Right Cessation
-
1996
- 1996-04-24 GB GB9608418A patent/GB2300319B/en not_active Expired - Fee Related
- 1996-04-26 DE DE19616779A patent/DE19616779A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149533A2 (en) * | 1984-01-13 | 1985-07-24 | Sony Corporation | Apparatus for receiving super high frequency signals |
| US5263182A (en) * | 1988-05-18 | 1993-11-16 | Samsung Electronics Co., Ltd. | Low-noise block converter for a satellite broadcasting system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1723793A2 (en) * | 2004-03-09 | 2006-11-22 | THOMSON Licensing | Verifying 22khz tone operation in a set-top box |
| EP1723793A4 (en) * | 2004-03-09 | 2007-02-21 | Thomson Licensing | Verifying 22khz tone operation in a set-top box |
| US7970341B2 (en) * | 2005-07-28 | 2011-06-28 | Thomson Licensing | Satellite LNB power supply adaptive load |
| US8078095B2 (en) | 2009-01-22 | 2011-12-13 | Avermedia Technologies, Inc. | Data communication system and data communication method |
| WO2012175705A1 (en) * | 2011-06-24 | 2012-12-27 | Thrane & Thrane A/S | Virtual n-band lnb |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2300319B (en) | 1997-07-30 |
| GB9608418D0 (en) | 1996-06-26 |
| KR0141742B1 (en) | 1998-07-01 |
| DE19616779A1 (en) | 1996-10-31 |
| KR960039675A (en) | 1996-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20070424 |