FI73345B - KOPPLINGSARRANGEMANG FOER KORRIGERING AV HORISONTELLA KUDD-DISTORTIONER. - Google Patents
KOPPLINGSARRANGEMANG FOER KORRIGERING AV HORISONTELLA KUDD-DISTORTIONER. Download PDFInfo
- Publication number
- FI73345B FI73345B FI832986A FI832986A FI73345B FI 73345 B FI73345 B FI 73345B FI 832986 A FI832986 A FI 832986A FI 832986 A FI832986 A FI 832986A FI 73345 B FI73345 B FI 73345B
- Authority
- FI
- Finland
- Prior art keywords
- diode
- input coupling
- coupling coil
- television receiver
- switch
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
- H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements
Landscapes
- Multimedia (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Details Of Television Scanning (AREA)
- Picture Signal Circuits (AREA)
- Radio Relay Systems (AREA)
- Optical Communication System (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Safety Valves (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Magnetic Ceramics (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
<7 7 7 A Γ<7 7 7 A Γ
1 / J u H J1 / J u H J
KYTKENTÄJÄRJESTELY VAAKASUUNTAISTEN TYYNYVÄÄRISTYMIEN KORJAAMISEKSICOUPLING ARRANGEMENT FOR CORRECTION OF HORIZONTAL CUSHION DISTORTIONS
Keksinnön lähtökohtana on kytkentä te levisiovastaanottimen kuvapinnan vaakasuuntaisten tyynyvääristymien korjaamisek-5 si diodimodulaattorin avulla. Tällainen diodimodulaattori on selitetty yksityiskohtaisesti esim. DE-patenttijulkai-sussa 20 31 218. Edellä mainittujen tyynyvääristymien korjaukseen tarvittava korjaus virta syötetään diodimodulaattorille kytkentäkelan välityksellä. Diodimodulaattoria oh jalo taan tällöin asteella, joka antaa juovataajuisia leveydeltään kenttätaajuisesti moduloituja sakarapulsseja. Aikaisemmin on tunnettua kytkeä kytkentäkelaan energian palauttamista varten diodi, joka syöttää kelaan varastoituneen energian televisiovastaanottimen syöttö jännitelähteeseen .The starting point of the invention is a connection for correcting horizontal pad distortions of the image surface of a television receiver by means of a diode modulator. Such a diode modulator is described in detail, e.g., in DE patent publication 20 31 218. The correction current required for the correction of the above-mentioned pad distortions is supplied to the diode modulator via a switching coil. The diode modulator is then controlled by a degree which produces line frequency modulated square pulses in width. In the past, it is known to connect a diode to the switching coil for energy recovery, which supplies the energy stored in the coil to the power supply of the television receiver.
15 Aikaisemmin on tunnettua muuttaa digitaalinen sakarapulssi mainitun asteen takaisinkytkentää varten RC-elimen avulla kenttätaajuiseksi parabelinmuotoiseksi signaaliksi. Lisäksi on tunnettua integroida digitaalinen suorakulmionignaa-li LC-elimen avulla kenttätaajuiseksi parabelinmuotoisek-20 si analogiajännitteeksi, jota käytetään kytkinasteen ta-kaisinkytkennässä ja joka syötetään myös kytkentäkelaan poikkeutusvirran moduloimiseksi.It is previously known to convert a digital claw pulse for feedback of said degree by means of an RC element into a field-frequency parabolic signal. In addition, it is known to integrate a digital rectangular signal by means of an LC element into a field-frequency parabolic analog voltage which is used in the switching stage feedback and which is also fed to the switching coil to modulate the deflection current.
Ensiksi mainittu kytkentä on tosin kustannuksiltaan edullisempi kuin toinen, mutta sen haittana on kuitenkin, että 25 kytkentäkelan kautta kulkeva virta voi kytkinasteen sulku-tilavaiheen aikana kulkea energian talteenoton suorittavasta diodista johtuen vain toiseen suuntaan. Tämä supistaa voimakkaasti diodimodulaattorikytkennän modulointias-tetta. Tätä voidaan tosin jälleen suurentaa nostamalla di-30 odimodulaattorin siltajännitettä, mikä kuitenkin huonontaa kytkennän hyötysuhdetta.Although the former connection is more cost-effective than the second one, its disadvantage is that the current flowing through the switching coil 25 can only flow in the other direction during the closed-stage phase of the switching stage due to the energy recovery diode. This greatly reduces the degree of modulation of the diode modulator circuit. However, this can again be increased by increasing the bridge voltage of the di-30 odododulator, which, however, degrades the switching efficiency.
Toinen kytkentä tosin sallii integrointielimen kondensaat torin ansiosta molemmat virran suunnat kytkentäkelassa, 2 73345 niin että diodimodulaattorin koko modulointiaste voidaan käyttää hyväksi. Tämä ratkaisu ei kuitenkaan ole käytetyistä komponenteista (induktanssi ja kapasitanssi) johtuen erityisen kustannusedullinen.However, the second connection allows both current directions in the switching coil, thanks to the capacitor of the integrating element, 2 73345, so that the full degree of modulation of the diode modulator can be exploited. However, this solution is not particularly cost-effective due to the components used (inductance and capacitance).
5 Keksintö perustuu siten tehtävään kehittää kytkentä, joka yhdistää mainitut edut, nimittäin toisen kytkennän kustan-nusedullisen ratkaisun samalla toisen kytkennän täyden mahdollisen modulointiasteen säilyttäen. Tämä tehtävä ratkaistaan patenttivaatimuksessa esitetyillä toimenpiteillä.The invention is thus based on the object of developing a connection which combines said advantages, namely a cost-effective solution for the second connection while maintaining the full possible degree of modulation of the second connection. This task is solved by the measures set out in the claim.
10 Keksintöä selitetään seuraavassa piirustuksen avulla.The invention will now be described with reference to the drawing.
Viitenumerolla 1 on esitetty televisiovastaanottimen juova-pääteaste, jossa on juovapäätetransistori 2, vaakapoikkeu-tuskelat 3, juovamuuntaja M ja vaakasuuntaisten tyynyvääris-tymien korjauksen suorittava diodimodulaattori 5, jonka toi-15 mintatapa on selitetty mainitussa DE-patenttijulkaisussa.Reference numeral 1 shows a line output stage of a television receiver having a line terminal transistor 2, horizontal deflection coils 3, a line transformer M and a diode modulator 5 for correcting horizontal pad distortions, the operation of which is described in said DE patent.
Diodimodulaattorissa 5 on kytkentäkela 6, joka saa ohjaus-piirien 7 avulla kehitetyt juovataajuiset, kenttätaajuises-ti moduloidut sakarapulssit, jotka kehittävät kytkentäke-lan 6 avulla tarvittavan modulaatiovirran. Ohjauspiirin 7 20 kytkintransistorin 8 johtamattoman vaiheen aikana kytkentä-kelaan 6 varastoitunut energia johdetaan diodin 9 kautta takaisin televisiovastaanottimen syöttöjännitelähteeseen 10. Kytkintransistoria 8 onjataan tunnetulla tavalla juova-taajuisilla sakarapulssei11a, jotka on leveysmoduloitu 25 kenttätaajuisesti . Juovataajuisten pulssien kehittämiseen käytetään parabelijännitegeneraattoria 11 differentiaali-vahvistimen 12 yhteydessä, jonka invertoivaan tuloon tuodaan pystytaajuinen parabelijännite ja ei-invertoivaan tuloon juovataajuinen sahahammasjännite. Kytkintransistorin 30 8 kollektorilta on johdettu takaisinkytkentä 13 differen tiaalivahvistimen 12 invertoivaan tuloon. Keksinnön mukaisesti diodin 9 yli on kytketty elektronisen kytkimen 14, esim. transistorin kytkentäväli, joka sallii transistorin 3 73345 8 sulkutilavaiheen aikana diodin virtaan nähden vastakkaissuuntaisen virran kulkemisen käyttöjännitelähteestä 10 kytkentäkelaan 6. Elektronista kytkintä ohjataan edullisimmin samalla ohjausjännitteellä kuin kytkintransis-5 toria 8.The diode modulator 5 has a switching coil 6, which receives line-frequency, field-frequency modulated square pulses generated by the control circuits 7, which generate the required modulation current by means of the switching coil 6. During the non-conducting phase of the switching transistor 8 of the control circuit 7 20, the energy stored in the switching coil 6 is returned to the supply voltage source 10 of the television receiver via a diode 9. The switching transistor 8 is divided in a known manner To generate the line frequency pulses, a parabolic voltage generator 11 is used in connection with a differential amplifier 12, to the inverting input of which a vertical frequency parabolic voltage is applied and to the non-inverting input a line frequency sawtooth voltage. A feedback 13 is fed from the collector of the switching transistor 30 8 to the inverting input of the differential amplifier 12. According to the invention, a switching interval of an electronic switch 14, e.g. a transistor, is connected across the diode 9, which allows the current of the transistor 3 73345 8 to flow in the opposite direction to the diode current from the operating voltage source 10 to the switching coil 6. The electronic switch
Koska transistori 14 voi olla erittäin pieni, se voidaan integroida yhdessä diodin 9 kanssa ohjauspiiriin 7.Since the transistor 14 can be very small, it can be integrated together with the diode 9 in the control circuit 7.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3234314A DE3234314C1 (en) | 1982-09-16 | 1982-09-16 | Circuitry for correcting east-west pincushion distortion |
DE3234314 | 1982-09-16 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI832986A0 FI832986A0 (en) | 1983-08-22 |
FI832986A FI832986A (en) | 1984-03-17 |
FI73345B true FI73345B (en) | 1987-05-29 |
FI73345C FI73345C (en) | 1987-09-10 |
Family
ID=6173350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI832986A FI73345C (en) | 1982-09-16 | 1983-08-22 | KOPPLINGSARRANGEMANG FOER KORRIGERING AV HORISONTELLA KUDD-DISTORTIONER. |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0103709B1 (en) |
AT (1) | ATE32818T1 (en) |
DE (1) | DE3234314C1 (en) |
DK (1) | DK161290C (en) |
ES (1) | ES8406822A1 (en) |
FI (1) | FI73345C (en) |
FR (1) | FR2533389B1 (en) |
GR (1) | GR79219B (en) |
IT (1) | IT1163612B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5043637A (en) * | 1990-12-14 | 1991-08-27 | Thomson Consumer Electronics, Inc. | Transformer coupled voltage clamp for pincushion correction circuit |
JPH0568178A (en) * | 1991-09-06 | 1993-03-19 | Sony Corp | Deflected current generating circuit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2031218C3 (en) * | 1970-06-20 | 1974-06-20 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Circuit arrangement for correcting raster distortions in a television display device |
DE2809198B2 (en) * | 1978-03-03 | 1980-03-20 | Saba Gmbh, 7730 Villingen | Circuit arrangement for correcting raster distortions in the horizontal direction in a television receiver |
US4329729A (en) * | 1980-06-23 | 1982-05-11 | Rca Corporation | Side pincushion modulator circuit with overstress protection |
-
1982
- 1982-09-16 DE DE3234314A patent/DE3234314C1/en not_active Expired
-
1983
- 1983-06-24 FR FR8310496A patent/FR2533389B1/en not_active Expired
- 1983-06-29 IT IT21828/83A patent/IT1163612B/en active
- 1983-07-28 AT AT83107426T patent/ATE32818T1/en not_active IP Right Cessation
- 1983-07-28 EP EP83107426A patent/EP0103709B1/en not_active Expired
- 1983-08-22 FI FI832986A patent/FI73345C/en not_active IP Right Cessation
- 1983-08-31 GR GR72339A patent/GR79219B/el unknown
- 1983-09-12 DK DK412583A patent/DK161290C/en not_active IP Right Cessation
- 1983-09-16 ES ES525693A patent/ES8406822A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT8321828A0 (en) | 1983-06-29 |
EP0103709A2 (en) | 1984-03-28 |
ATE32818T1 (en) | 1988-03-15 |
DK412583A (en) | 1984-03-17 |
FI73345C (en) | 1987-09-10 |
FI832986A (en) | 1984-03-17 |
EP0103709B1 (en) | 1988-03-02 |
FR2533389A1 (en) | 1984-03-23 |
DK161290B (en) | 1991-06-17 |
ES525693A0 (en) | 1984-07-01 |
GR79219B (en) | 1984-10-22 |
IT1163612B (en) | 1987-04-08 |
ES8406822A1 (en) | 1984-07-01 |
FR2533389B1 (en) | 1986-11-21 |
IT8321828A1 (en) | 1984-12-29 |
EP0103709A3 (en) | 1985-07-03 |
DE3234314C1 (en) | 1983-09-29 |
FI832986A0 (en) | 1983-08-22 |
DK161290C (en) | 1991-12-02 |
DK412583D0 (en) | 1983-09-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MA | Patent expired |
Owner name: DEUTSCHE THOMSON-BRANDT GMBH |