JPS6053375A - Horizontal deflection circuit - Google Patents

Abstract

PURPOSE:To obtain a sufficient deflection current without a ringing by providing a ringing suppression circuit effective to the ringing induced in a windup winding. CONSTITUTION:A horizontal output switching transistor (TR)1, a damper diode 2, a resonance capacitor 3, a horizontal output transformer 4, a horizontal deflection coil 5, and a correcting capacitor 6 perform the same operation and function as a conventional circuit other than the ringing suppression circuit. A rectifier diode 9 acts like a damper diode using a floating power supply capacitor 7 as a power supply at the first half of the scanning period, i.e., the damper period so as to suppress the ringing. A DC bypass resistance 8 acts to decrease the resonance Q by the windup winding N2 and a floating power supply capacitor 7, and a buffer resistor 10 prevents the oscillation when the rectifier diode 9 goes to the outside of the period operating as the damper diode in this case.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horizontal deflection circuit used in a display monitor device.

6) Since then, there has been a horizontal deflection circuit of this type as shown in FIG. In the figure, (1) is a horizontal output switching transistor, (2) is a damper diode that serves as a bidirectional current switch between the horizontal output switching transistor (1), and (3) is between the horizontal deflection coil (5). The resonant capacitor (4) is a horizontal cadence (fly bank transformer, etc.) that constitutes a resonant circuit. The loss within the power supply E
Supplement from b. Further, (6) H horizontal deflection coil (5) K is a correction capacitor for correcting the flowing current waveform.

Next, an example of operation will be explained. As shown in Figure 2 (D), the horizontal output switching transistor (1) is 0N-OFF.
When the horizontal output switching transistor (1
) becomes O. In this state, it becomes a resonant circuit of the horizontal deflection coil (5) and the resonant capacitor (3),
The current flowing through the horizontal deflection coil (5) is charged to the resonant capacitor (3) as the resonant content - (3) charging current, and the voltage at the resonant content °(3) '7 terminal rises suddenly and sharply. . This voltage is called a 17-lifeback pulse and has a waveform as shown in FIG. 2(a). Horizontal deflection,] The point at which all the electromagnetic energy (ΣLI2) of the coil (5) has been transferred to the electrostatic energy (upper cv'z) of the resonant capacitor (3), that is, the flyback pulse in Fig. 2 (8) At the time of the maximum value Epl of the waveform, conversely, energy is transferred from I (oscillation condenser (3)) to horizontal deflection coil (5). t, that is, horizontal fii + f direction coil (5), l!:, It continues to vibrate at the same resonance wave number determined by the self-inductance of the resonant capacitor (3) and the yaw-kame equation.
12 pressure tJ: becomes (], and then it is charged in the opposite direction. This ?1 becomes pressure &: I: When it slightly passes the t2 point, it becomes negative @Li',,!: But at this time, the damper The diode (2) becomes conductive, shorting the resonant circuit and stopping the vibration.However, the damper diode (2)
), the internal resistance of the horizontal deflection coil (5), and the time constant due to self-inductance are large, so the horizontal deflection coil (5)
) does not suddenly become 0, but decreases linearly.

When this current becomes (], that is, at the time t3 in Fig. 2, the whitening horizontal output switching transistor (]
) is set to 0FF-ON, the voltage of the power supply Eb is increased by the second ratio, L7E pb ten N-! -gb is added to horizontal deflection coil 1 (5), and self 1. i, a linearly increasing current flows at a specific value due to the inductance. As described above, the current flowing through the horizontal deflection coil (5) K is a combination of the current flowing through the horizontal output switching transistor (1) and the damper diode (2), as shown in Figure 2 (b). Become.

Next, in the circuit shown in Figure 1, the flybank voltage of the resonant capacitor (3) is applied to the horizontal circular quadrance (4) terminal A point, and the turns ratio of this horizontal circular quadrant (4) is 7.
Electric II set to 1:, the waveform becomes, and the horizontal deflection coil (5
). This relationship is shown in FIG.

The conventional horizontal deflection output circuit is configured as described above, and f
l/1ft, so during the 1v period when the horizontal circular switching transistor () is ON, the current increases sequentially from 0, so transient vibration 11h does not occur, but during the damper period when the damper diode (2) is ON. is ten DY-1'-,-
Since the current flowing through ID1'P and the horizontal deflection coil (5) increases rapidly, vibrations are likely to occur as shown in Fig. 3<b) and (C). The reason for this is that the damper diode (2) is connected to point A of the horizontal circular quadrangle (4) in Figure 1, and r1 is connected to the N2 winding at point B of the horizontal circular quadrangle (4) in Figure 1.
~For the friy vibration, the horizontal circular quadrence (4
This is because the damper is applied as a result of the transformer connection. For this reason, it is impossible to achieve a 100% smooth coupling between the winding N2 of the horizontal quadrangle (4) and the negative winding N1 without causing any damage. Therefore, winding ll & (bow 1, -
For the next winding Nu, it cannot be increased, that is, the number of turns is too large.
There were drawbacks such as the inability to add ; to the horizontal deflection coil.

This invention was made in order to eliminate the drawbacks of the conventional ones as described in 2. With a lower power supply type II:Eb, it is possible to obtain a 6-number ratio of several tens to more than 100 turns, compared to the following number of turns.
(Include sufficient deflection current required in the m direction)! The aim is to provide an output circuit for horizontal
).

Hereinafter, one embodiment of this generator will be explained with reference to the figure.3. In Figure 1..., (1) is a horizontal output switching resistor, (2) a tit damper diode, (3) 111 tatami mats: Fundenza, (4) lJ
, horizontal 1" i-cadence (7-quid, 9-quad trans, etc.)
, (5) is a horizontal deflection coil, and (6) is an i-capture 11F condenser, which is the same as the conventional circuit. (7) (8)
(9) (1 (1) is connected to the winding N2 of the horizontal output I lance (4) in the jf- column: /'l-7'j!
J ringing suppression circuit, (7) is 70~shink fl
j dy (capacitor, (8) id: , DC current bypass resistor when ringing is suppressed, (9) is a rectifier diode for the floating power supply, and when ringing is suppressed, the・(-Die; 4
- Works as a moderator. (10) is a gauze JIL resistor that suppresses sudden changes in the current flowing from the rectifier diode (9) when ringing is suppressed.

Next, regarding the operation, the horizontal output switching transistor (1), the damper diode (2), the resonant transistor (4), the horizontal circular quadrangle (4), the horizontal deflection coil (5), and the other components other than the ringing suppression circuit are: Since the operation of the correction condenser (6) is the same as that of the slave circuit shown in Figure 1, the floating power supply 11 which constitutes the ringing suppression circuit, the capacitor (7),
Mainly explaining the operation of the DC current bypass resistor (8), rectifier guide (9), and buffer resistor (10), the ringing as shown in Figures 3 (b) and (c) is caused by the horizontal circular quadrangle (4). Since there is no damper diode directly on the point B of the winding N2, it is generated by the cage inductance of the winding N2. Therefore, ideally, the fifth
As shown in the figure, at point B of the horizontal circular quadrangle (4), a power supply voltage I1 equal to the voltage Ec = E b N generated between the windings N2 and the windings NlO All you need to do is connect a damper diode to the power source that is connected to the C1 pumper and use all of the C1 pumpers.The Fran bank pulse waveform at this time and the current flowing through the horizontal deflection coil (5) are shown in Figure 6. , vibration %I) The waveform Ire does not occur and is a complete waveform.

In practice, having such a power supply requires only one horizontal
This is very difficult because the Eriharu electromotive voltage Ec changes in one wave. In addition, the damper diode must have a large withstand voltage of 1° (9) so that the peak value of the flyback pulse of the winding is 11".

One method of misfire is to extract this power supply tit pressure EC from the winding N2 in a floating form, as shown in Fig. 4. Condens (7)
-1 winding NzK induced voltage Icc-PIB
-! -2-, connect the rectifier diode (9) to the voltage
It will be charged immediately. The reverse voltage applied to the rectifier diode (9) during the flybank pulse is equal to the horizontal circular quadrant (4).
), there is only a potential difference between points A and B, and the rectifier dia 1-
+: Durability tJ, peak value of 79 Ibatsuta pulse 1・j
Compared to the number of turns of p 1] 1 oki 15 or more is good.

During 1q and a half of the scanning period, that is, during the damper period, the rectifying circuit (9) functions as a damper diode using the floating power supply capacitor (7) as a power source, and ) to suppress ringing.At this time, the 111 current bypass resistor (8) n
Winding 1, winding N2 and floating power supply condenser)
7) Acts as a buffer to lower the resonance Q (Hl)
It acts as a damper diode for the #J rectifier diode (9) to prevent it from swinging out when coming out of a period of rest. Figure 7 (aL) (b) and (c) show the difference in waveforms for changes in the circuit constants of Jin's ringing suppression circuit. Figure 7 (D) shows a 70-ting power supply condenser/@) (7
) terminal 1 (11-ball waveform, r1■ The smaller the pressure fluctuation, the better the /ging suppression effect.

In addition, in the above example, ringing 'IJ? An I IEM path may be provided between the water B terminal and ground. In particular) the terminal voltage of r-footing power supply capacitor (7) is 20 to 30
Under V, the function of the rectifier diode (5υ) as a damper diode deteriorates, so the same effect can be achieved by increasing the terminal voltage of a capacitor placed between the B terminal of the horizontal circular quadrence (4) and the ground. play.

As described above, according to the present invention, the low power supply voltage J=:b
sufficient deflection current without ringing? ! It is possible to construct a horizontal output circuit using ``I'', and f: can be used to construct a horizontal output circuit, and the resistance of the horizontal 111 cut, Ipung I transistor (f: 1: can be increased is i1J' fijg, etc.). Wholesale, size, horizontal deflection system with high horizontal frequency"...Tezu 1
, horizontal deflection coil self [−j, isin.

Subtracting Tatance by 1 produces the same effect λ) A <'l'
/I・J) times coil “i1” 11th child fit LIE
? c-l: The number of volumes of the horizontal circle quadrant, all 1. There are effects that can be obtained by

・1. Drawing r/l'l Qt &'191 Figure 1 &j Horizontal deflection 1' 3-force circuit 7J<. da', 2
Figure 3 shows the waveforms of each part of the water Δ11 deflection output circuit.
i, f to the US circuit, 1.・Rirumaki - Shows the ringing waveform at the time of collapse. Figure 4 Q: Water according to an example of this release in January
I'll・1'+lj'l1m showing the power circuit, 5
The figure shows the waveforms at the time of winding 1 and the connection method of the damper diode in accordance with the damper diode shown in FIG. 6Q. FIG. 7 shows operating waveforms of the ringing suppression circuit in the present invention.

In Figure 1 - C(])...Hydrohorizontal force switching 1 transistor, (2)・Damper diode, (3)・Resonance content, (4)・Horizontal circular quadrant, (5)
Horizontal can 11 direction coil, (6)...correction capacitor, 2nd
In the figure, (a) flybank pulse between damper diode terminals, (b) horizontal deflection coil current waveform, (
C)... o N/O F timing of damper diode, (Jll/n N/o h FF timing waveform of horizontal power finch transistor. In Fig. 3, (a) - actual waveform of damper diode, ( b
)...Actual waveform of winding terminal of horizontal output 1 tans, (c)
・Actual waveform of horizontal deflection coil current, Figure 4 (7)
)・70～Taing power supply capacitor, (8)・DC current bypass 11 (resistance, (9)...In the drawings, the same reference numerals as in FIG. 1 indicate the same or equivalent parts. In FIG. 6, (
a)...Terminal voltage of Gutuber diode (9), (b
)・Horizontal deflection coil current waveform, in Figure 7, (a)
・Heavy pressure waveform of the hoisting pj^1 child of the horizontal circular quadrangle when there is no ringing suppression control circuit, (b) ・'@heavy pressure waveform of the winding terminal of the horizontal circular quadrance when the ringing suppressing circuit is not effective at down tA ( 0) A voltage wave at the winding terminal of the lance that brings the ringing suppression circuit into full operation.

Agent Masu Oiwa 11X+ Figure 2 θ Z/ 12 13 Figure S3 θ □λ! IJ-frame 13? to: +-pHh:J Matsu-kumi) 1 multi-su 7-J ≧ 1 [■Works pu-ko σ) 94-si 11
6-q-□n3=H41-1 1fノλteq; 1 bird $n#, 5pa ξ) 1 414 Figure 5 (Figure 5b) Art f-Eiyu 1st cycle 11th order IJ Il 1″P, Tomi No. 7
1'4 Kuwayu/ji°・2-state range -7, J'i EI)su/he/bu (of the pot?Lev 1]-ti/2" -Kameshin lit Konoten↑1's end i/north , +j (method)
11. ,,+l+ 5"I 2+H'" 11. Name of the invention Horizontal deflection circuit: Representative of the person making the unyama j. Part 111 A. 8 Part 4 Agent 5. Date of amendment order January 81, 1980 ( Contents of drawings 7 and 7II!in (1) Drawings 8, 6, and 7 are revised as shown in the attached sheet.

Since then, Fig. 3 (Fig. 5 t-l, lq? /JI 59 2 29 Showa year month) (MochijPfl'l Long Palace 1! Showing 19 items Patent Application No. 16212θ No. 1987-2
Name of the invention: Horizontal deflection circuit; 3. To the representative of the person making the amendment: Hitoshi Katayama. Part 1: Attorney (1) The description is amended as follows.

Page line Correction before correction After correction 4 16. Shown below. In the figure, (a) shows the waveform of the terminal (2) of the damper diode (2), (b) shows the waveform of the terminal (2) of the transformer (4), and (C) shows the rectified waveform of the horizontal deflection coil (5).

7 1s As shown in Figure 6, Figure 6 < (a): 5th
The waveform at point ■ in the figure (b): current waveform of the horizontal deflection coil (6) in FIG. 5) is 8 20 . At this time. Figure 7 shows (a): no damping state, (b): poor damping state, and (C): no ringing state, respectively. Winding end of horizontal example transformer (4): r-c Horned thunderbolt 1wL-+,

Claims (1)

[Claims] A horizontal quadrance and a horizontal deflection coil consisting of a horizontal output switching transistor, a damper diode, and a flyback transistor, and its Je! capacitor,
In a horizontal deflection output circuit consisting of a current waveform correction capacitor used for figure-8 correction, etc., the winding connected to the horizontal deflection coil is wound up, and a horizontal quadrupler applies a 1ζ1J voltage higher than the power supply voltage to the horizontal deflection coil. In order to suppress the ringing that occurs during the redamping period in the cage flux of this winding part, between the winding tap and the intermediate tap or power supply,
A horizontal deflection circuit consisting of a diode, a first resistor, and a capacitor connected in series, and a second resistor connected in parallel to both ends of the capacitor.