GB1409580A - Cathode-ray tube driving circuit - Google Patents
Cathode-ray tube driving circuitInfo
- Publication number
- GB1409580A GB1409580A GB5866472A GB5866472A GB1409580A GB 1409580 A GB1409580 A GB 1409580A GB 5866472 A GB5866472 A GB 5866472A GB 5866472 A GB5866472 A GB 5866472A GB 1409580 A GB1409580 A GB 1409580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- beam current
- rectifier
- resistor
- arrangement
- 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.)
- Expired
Links
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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/20—Cathode-ray oscilloscopes
- G01R13/22—Circuits therefor
-
- 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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal 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
- 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
- H02M7/10—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 arranged for operation in series, e.g. for multiplication of voltage
- H02M7/103—Containing passive elements (capacitively coupled) which are ordered in cascade on one source
-
- 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
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
- H04N3/185—Maintaining dc voltage constant
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Rectifiers (AREA)
- Details Of Television Scanning (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
1409580 D.C.-D.C. converters MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 19 Dec 1972 [23 Dec 1971 24 Dec 1971 (3)] 58664/72 Heading H2F [Also in Division H4] In a cathode-ray tube system in which the E.H.T. voltage is derived by rectifying fly-back pulses and a focusing voltage is derived via a potential divider from the full E.H.T. or, when a voltage multiplier rectifier is employed, from an intermediate tap on the latter a desired ratio between the focusing voltage and the E.H.T. voltage is maintained, despite variations in the beam current of the tube, by producing a voltage the magnitude of which varies with variation in the beam current and combining this voltage with the voltage across the potential divider to produce a focusing voltage the ratio of which with respect to the E.H.T. voltage decreases as the beam current increases. Fig. 3 curve b shows this characteristic in comparison with the characteristic, curve a, of a prior cut system which is described with reference to Figs. 1, 2a and 2b (none shown). Fig. 4 shows a first arrangement in which the voltage developed across resistor 13 and which varies with variation in beam current Ib is combined with the voltage at terminal F of a three-stage multiplier rectifier 8 (supplied with fly-back pulses from fly-back transformer 7) via a potential divider network comprising resistors 10, 11, and 12 to provide the required focusing voltage VF<SP>1</SP>. In operation, when the beam current increases, the E.H.T. voltage VA and the voltage at terminal F decrease whilst the voltage across resistor 13 increases. Thus when the latter voltage is combined via the resistor chain 10, 11, 12 and by suitable adjustment of resistor 12 the rate of decrease in the voltage VF<SP>1</SP> may be made greater than the rate of decrease in VA so that the ratio VF<SP>1</SP>/VA decreases with increasing beam current. Variations of this circuit in which various ones of the capacitors in the multiplier rectifier 8 are removed are described with reference to Figs. 6 to 9 (none shown), and a further variation in which the resistor chain 10, 11, 12 is replaced by a similar resistor chain connected to terminal A is described with reference to Fig. 10 (not shown). Fig. 11 shows a second arrangement in which the voltage which varies with variation in beam current is derived by means of a rectifier 21 (such voltage being also usable as the screen voltage for the tube) and variations of this embodiment in which a two-stage multiplier and a single rectifier stage are employed are described with reference to Figs. 13 and 14 (neither shown). Fig. 12 shows a third arrangement in which the current dependent voltage is produced by means of a tertiary winding 7a and Fig. 15 shows a fourth arrangement in which such voltage is produced across a resistor 31 in series with the secondary winding of transformer 7. A variation of this latter arrangement in which the multiplier-rectifier 8 is replaced by a single rectifier stage is described with reference to Fig. 16 (not shown).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP47000504A JPS516491B2 (en) | 1971-12-23 | 1971-12-23 | |
JP21972A JPS4871135A (en) | 1971-12-24 | 1971-12-24 | |
JP22072A JPS5232533B2 (en) | 1971-12-24 | 1971-12-24 | |
JP21872A JPS5232532B2 (en) | 1971-12-24 | 1971-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1409580A true GB1409580A (en) | 1975-10-08 |
Family
ID=27453119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5866472A Expired GB1409580A (en) | 1971-12-23 | 1972-12-19 | Cathode-ray tube driving circuit |
Country Status (4)
Country | Link |
---|---|
US (1) | US3883780A (en) |
CA (1) | CA980457A (en) |
DE (1) | DE2263101C3 (en) |
GB (1) | GB1409580A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5813652Y2 (en) * | 1974-10-21 | 1983-03-16 | ソニー株式会社 | Kouatsu Hatsusei Cairo |
FR2480527A1 (en) * | 1980-04-14 | 1981-10-16 | Thomson Csf | CONTINUOUS FEEDING, IN PARTICULAR FOR FEEDING A CATHODIC TUBE |
DE4418780A1 (en) * | 1994-05-28 | 1995-11-30 | Philips Patentverwaltung | DC converter |
US5602447A (en) * | 1994-08-03 | 1997-02-11 | Thomson Consumer Electronics, Inc. | Cathode ray tube focus supply |
KR100406572B1 (en) | 2001-05-04 | 2003-11-20 | 삼성전자주식회사 | power supplying device for electron gun in CDT |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2591918A (en) * | 1949-10-15 | 1952-04-08 | Philips Lab Inc | Voltage-regulated electrical power supply |
US3417285A (en) * | 1966-02-07 | 1968-12-17 | Electrohome Ltd | Variable voltage networks |
US3519741A (en) * | 1967-06-12 | 1970-07-07 | Rca Corp | Regulated high voltage power supply |
US3609446A (en) * | 1969-06-02 | 1971-09-28 | Rca Corp | Power supply utilizing a diode and capacitor voltage multiplier for tracking focusing and ultor voltages |
-
1972
- 1972-12-19 GB GB5866472A patent/GB1409580A/en not_active Expired
- 1972-12-21 US US317308A patent/US3883780A/en not_active Expired - Lifetime
- 1972-12-22 CA CA159,852A patent/CA980457A/en not_active Expired
- 1972-12-22 DE DE2263101A patent/DE2263101C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2263101B2 (en) | 1975-08-14 |
DE2263101A1 (en) | 1973-07-05 |
US3883780A (en) | 1975-05-13 |
DE2263101C3 (en) | 1981-01-29 |
CA980457A (en) | 1975-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19921217 |