US3733513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuits for centering pictures on television screens
Assignee: Hunt Electronics Co
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Filing: 1970-04-10
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Granted: 1973-05-15
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Expires: 1990-04-10
Abstract
Abstract A variety of circuits for centering pictures on the screens of television tubes are characterized by the use of a picture centering variable resistor arranged in a loop including the horizontal and/or vertical deflection coils on said tubes. The variable resistor is connected by a brush or slidable contact with a source of direct current the magnitude and direction of which through the deflection coils controls the positioning of the associated picture. In connection with certain of the aforegoing circuits, provision is also made for high voltage stabilization.
Inventors
- 👤 S Yoshikawa
- 👤 H Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:57
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/227
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
190 words
A television circuit for use with a picture tube including a screen, circuit comprising: signal generation means generating at least one deflection signal for the production of a picture on the screen of said picture tube; a first d-c source; a loop coupled to said signal generation means and including leg portions connected in series therein, said source being outside of said loop, a first one of said leg portions including deflection coil means operatively associated with said picture tube and responsive to the signal of said signal generation means for controlling, at least in part, the production of a picture on said tube, a second one of said leg portions comprising variable resistor means including resistance means connected in series in said loop and a displaceable contact engaged with said resistance means and connecting said first dc source to said loop for controlling the magnitude and direction of flow of the direct current through said deflection coil means whereby the location of the picture on said tube is controlled; and a load circuit coupled to said loop for shunting direct current to effect the control of said picture location.
Claim 2
Dependent Claim
190 words
A television circuit for use with a picture tube including a screen, circuit comprising: signal generation means generating at least one deflection signal for the production of a picture on the screen of said picture tube; a first d-c source; a loop coupled to said signal generation means and including leg portions connected in series therein, said source being outside of said loop, a first one of said leg portions including deflection coil means operatively associated with said picture tube and responsive to the signal of said signal generation means for controlling, at least in part, the production of a picture on said tube, a second one of said leg portions comprising variable resistor means including resistance means connected in series in said loop and a displaceable contact engaged with said resistance means and connecting said first dc source to said loop for controlling the magnitude and direction of flow of the direct current through said deflection coil means whereby the location of the picture on said tube is controlled; and a load circuit coupled to said loop for shunting direct current to effect the control of said picture location.
Claim 3
Dependent Claim
20 words
A circuit as claimed in claim 1 wherein said signal generation means is a source of a horizontal deflection signal.
Claim 4
Dependent Claim
20 words
A circuit as claimed in claim 1 wherein said signal generation means is a source of a vertical deflection signal.
Claim 5
Dependent Claim
16 words
A circuit as claimed in claim 2 wherein said load circuit is a vertical deflection circuit.
Claim 6
Dependent Claim
16 words
A circuit as claimed in claim 1 wherein said load circuit is an audio output circuit.
Claim 7
Dependent Claim
36 words
A circuit as claimed in claim 1 comprising a flyback transforMer connected to said loop and including a plurality of windings; and a damper diode connected to said signal generation means for forming the deflector signal.
Claim 8
Dependent Claim
27 words
A circuit as claimed in claim 6 wherein said loop includes a third leg portion including a winding of said transformer connected in series in said loop.
Claim 9
Dependent Claim
35 words
A circuit as claimed in claim 6 wherein said loop includes a third leg portion including a choke coil connected in series therein and wherein said transformer is connected to but is outside said loop.
Claim 10
Dependent Claim
39 words
A circuit as claimed in claim 6 wherein said loop includes a third leg portion comprising a saturable reactor including a winding connected in series in said loop, and said transformer is connected to but is outside said loop.
Claim 11
Dependent Claim
31 words
A circuit as claimed in claim 1 wherein said second leg portion of said loop includes a coil connected to said resistance means in series therein and to said load circuit.
Claim 12
Dependent Claim
30 words
A circuit as claimed in claim 1 comprising a resistor connecting said load circuit to said loop; and a bypass capacitor connected to said resistor for bypassing said load circuit.
Claim 13
Dependent Claim
32 words
A circuit as claimed in claim 1 comprising a capacitor connected to but outside said loop and in a series resonant circuit with said deflection coil means of said first leg portions.
Claim 14
Dependent Claim
57 words
A circuit as claimed in claim 12 comprising a fly-back transformer including a plurality of windings, said loop including a third leg portion connected in series therein and including a winding of said transformer, said circuit further comprising a bypass capacitor connected between said loop and ground at a junction of said second and third leg portions.
Claim 15
Dependent Claim
59 words
A circuit as claimed in claim 12 comprising a saturable reactor, said loop including a third leg portion connected in series therein and including said reactor, said circuit further comprising a bypass capacitor connected between said loop and ground at a junction of said second and third leg portions; and a fly-back transformer connected to but outside said loop.
Claim 16
Dependent Claim
43 words
A circuit as claimed in claim 1 comprising an output transformer including a first winding coupled to said signal generation means and a second winding included in said first leg portion in series in said loop and operatively associated with said first winding.
Claim 17
Dependent Claim
78 words
A circuit as claimed in claim 15 wherein said first winding of said transformer is connected directly to said second winding thereof at one junction of said first and second leg portions for shunting direct current to said signal generation means, and wherein further said load circuit is coupled to said loop at said another junction of said first and second leg portions, said circuit further comprising a bypass capacitor coupled to said loop at said one junction.
Claim 18
Dependent Claim
40 words
A circuit as claimed in claim 16 comprising a feed-back means including a coupling capacitor, a component of a deflection signal developed in said loop being fed to said signal generation means through said coupling capacitor to compensate deflection linearity.
Claim 19
Dependent Claim
95 words
A circuit as claimed in claim 7 comprising a high-voltage generation means including said flyback transformer and a high-voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected between said displaceable contact and a junction of said second and third leg portions whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means, said load circuit being connected to a junction of said first and second leg portions.
Claim 20
Dependent Claim
96 words
A circuit as claimed in claim 8 comprising a high-voltage generation means including said fly-back transformer and a high voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected between said displaceable contact and a junction of said second and third leg portiOn whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means, said load circuit being connected to a junction of said first and second leg portions.
Claim 21
Dependent Claim
95 words
A circuit as claimed in claim 9 comprising a high-voltage generation means including said fly-back transformer and a high-voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected between said displaceable contact and a junction of said second and third leg portion whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means, said load circuit being connected to a junction of said first and second leg portions.
Claim 22
Dependent Claim
81 words
A circuit as claimed in claim 8 comprising; a capacitor connecting said signal generation means to said loop at a junction of said first and third leg portions and in a series resonant circuit with said deflection coil means; and another load circuit coupled to said loop at a junction of said second and third leg portions for shunting direct current therefrom, first said load circuit being coupled to said loop at a junction of said first and second leg portions.
Claim 23
Dependent Claim
19 words
A circuit as claimed in claim 21 comprising by-pass capacitors connected respectively between said displaceable contact and said junctions.
Claim 24
Dependent Claim
81 words
A circuit as claimed in claim 9 comprising a capacitor connecting said signal generation means to said loop at a junction of said first and third leg portions and in a series resonant circuit with said deflection coil means; and another load circuit coupled to said loop at a junction of said second and third leg portions for shunting direct current therefrom, first said load circuit being coupled to said loop at a junction of said first and second leg portions.
Claim 25
Dependent Claim
19 words
A circuit as claimed in claim 23 comprising bypass capacitors connected respectively between said displaceable contact and said junctions.
Claim 26
Dependent Claim
145 words
A circuit as claimed in claim 15 wherein said signal generation means includes interconnected transistors, one of said transistors applying said deflection signal to said first winding of said output transformer, another of said transistors driving said one transistor, said loop including a third leg portion including a resistor, which is connected to said other transistor at a junction of said first and third leg portions for the feeding of a component of said delection signal and for shunting direct current to said other transistor; said load circuit being coupled to said loop at a junction of said first and second leg portions; said circuit further comprising another load circuit coupled to said loop at a junction of said second and third leg portions for shunting direct current; and a second DC source connected to said one transistor via said first winding of said transformer.
Claim 27
Dependent Claim
16 words
A circuit as claimed in claim 25 comprising a bypass capacitor connected across said resistance means.
Claim 28
Dependent Claim
41 words
A circuit as claimed in claim 25 comprising coils connected respectively between said loop and load circuits for suppressing said deflection signal applied to said load circuits; and further bypass capacitors connected respectively to said coils for bypassing said load circuits.
Claim 29
Dependent Claim
54 words
A circuit as claimed in claim 23 comprising a high-voltage generation means including said flyback transformer and a high-voltage rectifier means for generating a high-voltage to apply said picture tube, said saturable reactor including a further winding outside said loop for controlling the inductance in the first said winding to compensate picture size changes.
Claim 30
Dependent Claim
30 words
A circuit as claimed in claim 28 comprising a second DC source connected to said further winding of said reactor for flowing direct current therethrough to said signal generation means.
Claim 31
Dependent Claim
63 words
A circuit as claimed in claim 28 wherein said further winding of said reactor is connected tO a winding of said transformer in series, said circuit further comprising a second d-c source connected to said signal generation means by means of said further winding of said reactor and said winding of said transformer for supplying direct current therethrough to said signal generation means.
Claim 32
Dependent Claim
19 words
A circuit as claimed in claim 30 comprising a bypass capacitor connected across said further winding of said reactor.
Claim 33
Dependent Claim
32 words
A circuit as claimed in claim 24 comprising coils connected respectively between said loop and load circuits; and further bypass capacitors connected respectively to said coils for bypassing respectively said load circuits.
Claim 34
Dependent Claim
46 words
A circuit as claimed in claim 28 comprising bypass capacitors connected respectively between said displaceable contact and said junctions of said leg portions; coils connected respectively between said loop and load circuits; and further capacitors connected respectively to said coils for bypassing respectively said load circuits.
Claim 35
Dependent Claim
43 words
A circuit as claimed in claim 29 wherein said further winding of said reactor is connected directly to said signal generation means at one junction, said circuit further comprising a coupling capacitor connecting said signal generation means to a winding of said transformer.
Claim 36
Dependent Claim
24 words
A circuit as claimed in claim 34 comprising a bypass capacitor connected to further winding of said reactor for bypassing said second DC source.
Claim 37
Dependent Claim
136 words
A circuit as claimed in claim 28 wherein said transformer includes first and second windings, said circuit further comprising a second DC source connected to said signal generation means by means of a winding of said transformer; a resistor connecting the latter said winding of said transformer to ground for detecting the beam current of said picture tube; a transistor including base, collector and emitter electrodes, said base electrodes being connected to a junction of said resistor and said winding of said transformer, one of said collector and emitter electrodes being connected to said further winding of said reactor, another of said collector and emitter electrodes being connected to a basic potential; and a third d-c source connected to said further winding of said reactor for flowing direct current therethrough to be controlled by said transistor.
Claim 38
Dependent Claim
23 words
A circuit as claimed in claim 36 comprising a bypass capacitor connected to said second winding of said transformer for bypassing said resistor.
Claim 39
Dependent Claim
79 words
A circuit as claimed in claim 24 comprising brightness control means connected to one of electrodes in said picture tube; rectifying means responsive to changes in the beam current of said picture tube; and current control means connected to said rectifying means for controlling direct current in said further winding of said reactor to change inductance in said first winding thereof whereby the picture size changes occurring as a result of operation of the brightness control means are compensated.
Claim 40
Dependent Claim
84 words
A circuit as claimed in claim 28 comprising brightness control means connected to one of the electrodes in said picture tube; rectifying means responsive to changes in current in proportion to the beam current of said picture tube; and current control means connected to said rectifying means for controlling direct current in said further winding of said reactor to change inductance in said first winding thereof whereby the picture size changes occurring as a result of operation of said brightness control means are compensated.
Claim 41
Dependent Claim
85 words
A circuit as claimed in claim 28 comprising brightness control means connected to one of the electrodes in said picture tube; rectifying means responsive to changes in voltage in proportion to the high voltage applied to said picture tube; and current control means connected to said rectifying means for controlling direct current in said further winding of said reactor to change inductance in said first winding thereof whereby the picture size changes occurring as a result of operation of said brightness control means are compensated.
Claim 42
Dependent Claim
83 words
A circuit as claimed in claim 7 comprising a high-voltage generation means including said fly-back transformer and a high-voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected to said displaceable contact and across a part of said resistance means divided by said displaceable contact whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means.
Claim 43
Dependent Claim
83 words
A circuit as claimed in claim 8 comprising a high-voltage generation means including said fly-back transformer and a high-voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected to said displaceable contact and across a part of said resistance means divided by said displaceable contact whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means.
Claim 44
Dependent Claim
83 words
A circuit as claimed in claim 9 comprising a high-voltage generation means including said fly-back transformer and a high-voltage rectifier means for generating a high-voltage to apply to said picture tube; a brightness control means connected to said picture tube; and a diode connected to said displaceable contact and across a part of said resistance means divided by said displaceable contact whereby said diode is conductive to compensate a picture location change occurring as a result of operation of said brightness control means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |