• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A voltage regulator provides a regulated B+ voltage to the horizontal deflection circuit of a television receiver. A positive feedback loop senses the load current drawn by the deflection circuit. The positive feedback voltage increases the magnitude of a reactive impedance component of the voltage regulator as the load current increases in order to maintain a substantially constant raster width.
    公开号:SU724096A3
    申请号:SU782570947
    申请日:1978-01-23
    公开日:1980-03-25
    发明作者:Чарльз Пир Джон；Уоррен Лаз Дэвид
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to television and can be used in television receivers.
    A device for raster width adjustment is used, which uses voltage regulators and silicon controlled gates with adjustable opening phase to obtain an adjustable voltage. A filter for eliminating pulsations of 60 Hz requires relatively large variable resistors in series with a horizontal deflection circuit. When a large load current is consumed, the voltage applied to the horizontal deflection of the lower winding, due to the voltage drop across the resistors, decreases much more than is necessary to compensate for the blurring of the image. The negative feedback target reacts to a voltage increase and increases the opening angle of the silicon controlled valve, increasing the peforming voltage, and thereby corrects the width of the raster 1.
    However, in this device, the correction voltage required to prevent the image from spreading is obtained by reducing the paratroopte ng applied to the deflection winding due to the fall of the voltage across the resistance, thereby undesirably increasing the power dissipation.
    The closest technical solution to. The invention is a device for adjusting the raster width, comprising a rectifier unit, a voltage regulator and a horizontal deflection unit, the voltage regulator consisting of an operational amplifier, the output of which is connected to the control electrode of the thyristor, the cathode of which through the first capacitor is connected to the green shchina, and the anode is connected to the choke, the non-inverting input of the operational amplifier is connected through the first resistor to the output of the rectifier unit and to the cathode Zener iodine whose anode is connected to the ground bus and the inverting input of the operational amplifier is connected to the thyristor cathode through a second resistor, and in the horizontal deflection unit one end of the primary primary transformer of the horizontal sweep is connected to the thyristor cathode and the second end of the primary winding is connected through the winding horizontal deviations to the first possessor of the second capacitor, parallel to the horizontal deviation windings connected in series with the second capacitor included respectively, the third capacitor, diode and transistor (2).
    The purpose of the invention is to reduce power dissipation.
    D (1 of this v. Device for adjusting the width of the raster containing a rectifier unit, a voltage regulator and a horizontal deflection unit; the voltage regulator consists of an operational amplifier whose output is connected to the thyristor control unit through a pulse modulator whose cathode is connected via the ground bus through the first capacitor and the anode is connected to the choke, the non-inverting input of the operational amplifier is connected through the first resistor to the output of the rectifier unit and to the cathode of the Zener diode a, the anode of which is connected to the ground bus and the operating amplitude which inverts the input) I through the second resistor is connected to the cathode of the thyristor, and in the horizontal deflection unit one end of the first primary winding of the horizontal transformer is connected to the thyristor cathode and the second end of the first primary winding connected through the horizontal deflection winding to the first plate of the second capacitor, in parallel to the horizontal deflection winding connected in series with the second capacitor are connected with respectively, a third capacitor, a diode and a transistor, the second primary winding in the horizontal transformer and a positive feedback circuit consisting of the third and fourth resistors, with one end of the second primary winding connected to the output of the rectifier unit, and the second end with a voltage regulator choke, a third resistor for the end of the plug to the inverting input of the operational amplifier, and the other for the second plate of the second capacitor, the fourth resistor is connected at one end to the anode d Zener iodine, the other with the second lining of the second capacitor.
    FIG. 1 shows a circuit diagram of the proposed device; in fig. 2 - time diagrams that show his work.
    The device contains in a test block 1, a voltage regulator 2 and a horizontal deflection block 3. The regulator 2 consists of an operational amplifier 4, a pulse modulator 5, a thyristor 6, a capacitor 7, a droselsel 8, and the non-inverting input of the operational amplifier 4 is connected through the first resistor 9 to the output of the rectifier unit 1 and to the cathode of the Zener diode 10, and the inverting the input of the operational amplifier 4 is the second resistor And is connected to the cathode of the thyristor 6. In block 3 horizontal deflection one
    0 the end of the first primary winding 12 of the horizontal transformer 13 is connected to the cathode of the thyristor 6, and the second end. the first primary winding 12 is connected through a horizontal deflection winding 14 to
    5, the first plate of the second capacitor 15, the third capacitor 16, the diode 17 and the transistor 18 are connected in parallel to the horizontal deflection winding 14 and the second capacitor 15 connected in parallel,
    0 one end of the BTOf hey of the primary winding 19 of the transformer 13 is connected to the output of the rectifying unit 1, the end of the author is to the choke of 8 ..
    The device contains a positive feedback circuit consisting of a third 20 and fourth 21 resistors.
    The device works as follows.
    The alternating line voltage at terminals 22 and 23 is supplied to the input terminals of the rectifier unit 1. The power supply filter capacitor 24 is connected to the output terminals of the unit 1, and a largely filtered, but unregulated DC voltage is obtained at the output terminals of the unit 1 (in the drawing, this voltage is shown as gb in the form of +150 V).
    A voltage of +15 V is applied to the input terminal 25 of the voltage regulator 2. The control voltage my B + is obtained at the output terminal 26 of the regulator 2 (in the drawing this voltage is shown as +110 V). The voltage B + at terminal 26 is supplied to one end of the primary winding 12 of the horizontal scanning transformer 13 of unit 3. The other end of the primary winding 12 is connected to the horizontal deflection winding 14, which is connected to ground through a capacitor 15 and a current-responsive resistor 21. In parallel with the winding 14 and the capacitor 15, a transistor 18, a diode 17, and a capacitor 16 are connected. The base of the transistor 18 is connected to a horizontal sweep generator and a control circuit (not shown) for. provide current scan
    in the winding 14
    horizontally with frequency.
    Tn
    权利要求:
    Claims (2)
    [1]
    rejection. The reverse beam pulses from the winding 14 are fed through the tertiary winding of the transformer 13 to the high voltage circuit 5 of the circuit 27 to provide an acceleration: a voltage across the accelerating anode of an electrofusion tube that is not shown. The effect of the voltage regulator 2 is that the voltage regulation is achieved without the need for large power dissipation to keep the voltage B + at terminal 25 constant. The input terminal 25 is connected to the primary winding 19 of the transformer 1.3. In order to provide the load current in the horizontal deflection unit 3, the thyristor 6 switches from CKOpdcTbro horizontal scan kn by means of driving pulses received from the pulse modulator 5 of the position. The amount of current provided is determined by the opening time of the thyristor 6. With changes in the linear or load conditions of opening the thyristor 6, i.e. the switch-on cycle mode is also changed accordingly by changing the phase of the driving pulses. Thus, the thyristor 6 functions as a varying reactive impedance for regulating the voltage B +. The voltage at the bottom of the primary winding 19 is relative. to earth for one deflection cycle is shown in FIG. 2 a. Using the appropriate polarity selection for windings 12 and 19, the curve represents a constant voltage during the course of the forward path of the beam from Ti-T4 and a negative backstop pulse during the reverse interval, of the beam from,. As shown in FIG. 2 b, the driving pulse is applied during Tz to control the thyristor 6, and drive it to the open state. The voltage appearing on the choke 8 is integrated and the increasing current flows through the thyristor 6 from time T2-T4. To close the thyristor 6, beginning with time T4, a negative backward pulse reduces the current flowing through the thyristor 6 to a lower level at which the current level needs to be maintained over time T ;. As shown in FIG. 2 g, the voltage at the anode of the thyristor 6 is equal to the voltage B + in the PO B, when the thyristor 6 is in the conducting state, and in another case it is equal to the voltage of the lower part of the winding 19.. The change in the phase of the driving pulses within each interval of the horizontal sweep to maintain the voltage regulation is achieved by supplying the negative feedback of the first feedback voltage to the inverting input of the amplifier through the negative feedback circuit. The voltage on the non-inverting the input of amplifier 4 is maintained according to the potential detected by a Zener diode 10. The cathode of the diode 10 is connected to the terminal 25 through a resistor 9. The first feedback voltage is established at the connection point of the resistors 11 and 20 of the voltage divider connected to the output terminal 26 V-b. The output voltage of the amplifier 4 is supplied in the control voltage to the pulse modulator 5 of the position. Changes in voltage B + lead to changes in the first feedback voltage, which lead to a change in the control voltage supplied to the modulator 5. A change in the control voltage will adjust the phase of the driving pulses, thereby changing the on-cycle mode. - turn off the thyristor 6, ensuring appropriate regulation. The arrival of the thyristor 6 earlier in each interval of the beam path, they will compensate for the conditions of the lower lines and / or the greater load the current consumed by the horizontal deflection unit 3. Acting on the thyristor 6, they will later compensate for the conditions of high lines and / or minor leakage of the load current. Under conditions of high (upper) lines, the voltage at terminal 25 will begin to increase above +150 V, immediately increasing the voltage at the output terminal 26 V +. The feedback voltage at the inverting input of the amplifier 4 increases the variation of the control voltage supplied to the pulse modulator 5 of the position. The phase of the driving pulses lags behind in relation to the beginning. each interval of the horizontal beam scan. As shown in FIG. 2 b, the driving pulse arrives at the control electrode of the thyristor 6 after the time Tc-Current through the thyristor 6, passing to the load of FIG. 2 V starts at time T3 and ends at time Tg, thus changing the cut cycle of the thyristor 6 disconnection 6. The average value of the load current after each horizontal deflection cycle increases, thereby maintaining a constant output voltage B + under the conditions of the upper lines. When a current-responsive resistor 21 is installed in the second feedback circuit of controller 2, the raster spacing is achieved without the occurrence of relatively large power dissipations. When the load of the beam of the high voltage circuit increases, the load current consumed by the horizontal deflection unit 3 increases. The voltage across the resistor 21 increases and serves as the voltage of the second feedback to the inverting input of the amplifier 4. The increasing feedback voltage regulates the phase of the driving pulses relative to the phase they had in the absence of the second feedback voltage. Adding the voltage of the second feedback, thus, adjusts the turn-on mode of the thyristor 6 and does not adjust the voltage B + on the output terminal 26 while reducing the voltage B-to the extent necessary to compensate for the blurring effect at a decreasing accelerating potential . The voltage drop required to adjust the raster width is obtained by increasing the reactive impedance of the regulator 2. This is accomplished using a second feedback circuit, which actually provides the voltage of the positive feedback to the regulator 2. As the load current increases , the voltage Bf at the clamp 26 tends to instantaneously decrease. The first feedback circuit tends to increase the voltage on the clamp 26. However, due to the positive feedback of the second feedback circuit, the voltage However, at clamp 26, however, it will be significantly reduced, providing adjustment of the raster width. The proposed device provides a relatively small dissipated in resistance. Regulation is achieved by varying the reactive component of the impedance of the regulator 2. Due to the fact that the resistor 21 is included in the feedback circuits of the regulator 2, the force of the device is substantially greater, so that the feedback voltage obtained during the heatsink of the resistor 21 can be relatively little. The resistance of the resistor 21 can be selected with a relatively small value, and the power dissipated will also be relatively small. Voltage B + - I10 B at terminal 26 is shown in FIG. 1 minute less than +150 V at the output terminal. This lower voltage B + has great advantages for performing horizontal transistor deviation unit 3. The invention, however, can be used both with a voltage B + below and above the input voltages of the regulator. If a higher voltage B + is required, the opening time of the thyristor in the beginning increases until the charge on the capacitor 7 reaches a voltage higher than B +, after which the regulator operates as previously described. Capacitor 7 acts as a filter for dl. horizontal sweep speeds flowing through clamp 26. If required, capacitor 7 can be connected in parallel to Clips 25 and 26 instead of clamp 26 and the ground. With this switch on, a small power of the horizontal sweep speed will flow through the source filter filter capacitor 24 and will result in a small effective heating value for the capacitor 24. Claim of the Invention A device for adjusting the raster width, containing a rectifier unit, a voltage regulator and a horizontal deflection unit, This voltage regulator consists of an operational amplifier, the output of which is connected via a pulse modulator to the control electrode of the thyristor, the cathode of which A through the first capacitor is connected to the ground bus, and the anode is connected to a choke, the non-inverting input of the op-amp amplifier is connected via the first resistor to the output of the rectifier unit and to the cathode of the Zener diode, the anode of which is connected to the ground width, and the inverting input of the onepaiyHHoro amplifier through the second resistor is connected to the thyristor cathode, and in the horizontal deflection unit one end of the first primary winding of the horizontal scanning transformer is connected to the thyristor cathode, and the second end of the first primary winding and connected through a horizontal deflection winding to the first plate of the second capacitor, in parallel to the connected M, eating the horizontal deflection winding with the second capacitor, respectively, a third capacitor, a diode and a transistor are connected, characterized in that, in order to reduce power dissipation, the second primary winding is inserted in a horizontal scanning transformer and a positive feedback circuit consisting of the third and fourth resistors, with one end of the second primary winding connected with the output of the rectifying unit, and the other end with the voltage regulator choke, the third resistor is connected at one end to the inverting input of the operational amplifier, and the other to the second plate of the second capacitor, the fourth resistor is connected at one end to the anode of the Zener diode, and the other with the second lining of the second capacitor. Sources of information taken into account in the examination ..I. US Patent No. 3626238, cl. N About J 29/70, 1974.. ...
    [2]
    2. US patent N 3832595, cl. H 01 T29 / 70, 1974 (prototype).
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    MX4148E|1982-01-12|
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    引用文献:
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    US3444426A|1967-12-29|1969-05-13|Motorola Inc|Horizontal sweep system with automatic raster size regulation|
    CH489166A|1968-03-26|1970-04-15|Setalec S A|Stabilized line scanner in a transistor television receiver|
    GB1261520A|1968-08-27|1972-01-26|Rca Corp|Improvements in and relating to power supply arrangements for cathode ray tubes|
    GB1385333A|1971-02-04|1975-02-26|Matsushita Electric Ind Co Ltd|Television receiver|
    GB1431043A|1972-04-05|1976-04-07|Rca Corp|Boosted voltage source in a deflection system|
    DE2313039B2|1973-03-16|1976-02-26|Loewe Opta Gmbh, 1000 Berlin|CIRCUIT ARRANGEMENT FOR CONTROLLING THE ENERGY CONSUMPTION OF A THYRISTOR HORIZONTAL DEFLECTION CIRCUIT|
    US3819979A|1973-05-10|1974-06-25|Philco Ford Corp|High voltage regulators|
    JPS51151012A|1975-06-20|1976-12-25|Matsushita Electric Ind Co Ltd|Lateral amplitude stabilizer unit|FR2438395B1|1978-07-27|1985-01-18|Thomson Brandt|
    US4254365A|1979-10-01|1981-03-03|Rca Corporation|Side pincushion correction modulator circuit|
    US4298829A|1980-02-08|1981-11-03|Rca Corporation|Power supply and deflection circuit with raster size compensation|
    FR2484178B1|1980-06-10|1985-03-08|Thomson Brandt|
    FR2497045B1|1980-12-23|1984-05-25|Thomson Brandt|
    US4525739A|1982-12-21|1985-06-25|Rca Corporation|Television receiver power supply regulation responding to beam current changes|
    GB8333067D0|1983-12-12|1984-01-18|Rca Corp|Horizontal deflection circuit|
    JPS60251777A|1984-05-29|1985-12-12|Sony Corp|Amplitude detecting circuit of vertical deflection signal|
    DE3936789A1|1989-11-04|1991-05-08|Thomson Brandt Gmbh|PROJECTION TELEVISION|
    US5034667A|1990-04-13|1991-07-23|Thomson Consumer Electronics, Inc.|Raster size regulating circuit|
    FR2683692B1|1991-11-13|1994-03-04|Nokia Consumer Electronics Franc|DEVICE FOR CONTROLLING A HORIZONTAL SCANNING DEVIATOR OF A TELEVISION RECEIVER, PARTICULARLY WITH HIGH DEFINITION.|
    GB2272617B|1992-07-13|1996-01-10|Eldon Technology Ltd|Stabilization of EHT voltage and horizontal scan for magnetic deflection cathode ray tube circuits|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/762,097|US4104567A|1977-01-24|1977-01-24|Television raster width regulation circuit|
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