CN1641988A - Voltage stabilizing circuit for high-voltage/deviational split type image display device - Google Patents
Voltage stabilizing circuit for high-voltage/deviational split type image display device Download PDFInfo
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- CN1641988A CN1641988A CN 200410021065 CN200410021065A CN1641988A CN 1641988 A CN1641988 A CN 1641988A CN 200410021065 CN200410021065 CN 200410021065 CN 200410021065 A CN200410021065 A CN 200410021065A CN 1641988 A CN1641988 A CN 1641988A
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Abstract
The invention relates to a voltage stabilization circuit of high voltage/ preferential segregation type image display device. It comprises PWM control circuit, switch power supply transformer and regulation and compensation section. The PWM control circuit output PWM control signal according to the regulated and compensated winding feedback voltage. The invention could radically decrease the component of voltage stabilization circuit.
Description
Technical field
The present invention relates to the voltage stabilization circuit of high pressure/deflection divergence type image display, an invention of the voltage stabilization circuit that constitutes about the ball bearing made using in high pressure/deflection divergence type image display, used of saying so more specifically.
Background technology
Image display is divided into one-piece type image display of high pressure/deflection and high pressure/deflection divergence type image display usually from big aspect.In conventional art, though resemble and be extensive use of horizontal deflection circuit and the one-piece type image display of high-tension circuit in the television set type image display, but along with high-resolution large-scale image display more than the horizontal frequency 100KHZ progressively increases, the divergence type image display of bringing into use the horizontal deflection circuit to separate with high-tension circuit.
Fig. 1 is the voltage stabilization circuit figure of the high pressure/deflection divergence type image display of conventional art.Followingly the voltage stabilization circuit of conventional art is carried out schematic illustration with reference to Fig. 1.
At first, will be input to transistor Q1 base stage from the pulse-width modulation control signal of control circuit for pulse-width modulation portion 100 outputs; And pulse-width modulation control signal provides assigned voltage to SMPS switching mode power supply transformer T1 primary side thus.The above-mentioned voltage that provides to switching mode power supply transformer T1 primary side is sent to the secondary side of switching mode power supply transformer, and this signal is undertaken exporting the direct current dc voltage after the rectification by the diode D1, the D2 that link to each other with the switching mode power supply transformer secondary side, inductance L 1, capacitor C 2 again.
At this moment, adjust compensating circuit portion 110 and utilize photoelectrical coupler IC1 to detect, and this direct voltage is fed back to control circuit for pulse-width modulation portion 100 from the direct voltage of above-mentioned switching mode power supply transformer secondary side output.The control circuit for pulse-width modulation portion 100 that the direct voltage of output is fed is used to control pulse-width modulation control signal.
On the other hand, power supply receiver input circuit portion 120, for making horizontal frequency and control circuit for pulse-width modulation portion frequency consistent, frequency is carried out the circuit of conversion with control circuit for pulse-width modulation portion, after utilizing horizontal drive signals amplifying circuit portion 124 to amplify horizontal drive signals, be sent to waveform transformation circuit part 126 by teaser transformer T2.Above-mentioned waveform transformation circuit part 126 will be transformed to sawtooth waveform by the horizontal drive signals that teaser transformer T2 transmits, and it is outputed to control circuit for pulse-width modulation portion 100.
Aforesaid conventional art adjustment compensating circuit portion 110 and power supply receiver input circuit portion 120 be the expense height of circuit itself not only, and because the number of spare parts on the PCB (printed circuit board (PCB)) is many, so the wage expenditure also increases.These problems are the reasons that finally cause display manufacturing expense and price to rise.
Summary of the invention
The present invention provides a kind of voltage stabilization circuit that constitutes with very simple circuit in order to solve the problems of the technologies described above.
In order to solve the problems of the technologies described above, the present invention is achieved in that the high pressure/voltage stabilization circuit of deflection divergence type image display is to be made of following structure: the control circuit for pulse-width modulation portion of output pulse width modulator control signal; The transistor that base stage links to each other with above-mentioned control circuit for pulse-width modulation portion output; First siding ring links to each other with above-mentioned transistor collector, and according to above-mentioned pulse-width modulation control signal, will be in first siding ring induced voltage be sent to the switching mode power supply transformer of secondary side; Link to each other with an end of above-mentioned switching mode power supply transformer first siding ring, and be received in the induced voltage that transmits in the second siding ring of above-mentioned switching mode power supply transformer, and it is fed back to the adjustment bucking coil of above-mentioned control circuit for pulse-width modulation portion; And above-mentioned control circuit for pulse-width modulation portion controls pulse-width modulation control signal from the voltage level of above-mentioned adjustment bucking coil feedback, and it is exported.
And the voltage stabilization circuit of above-mentioned high pressure/deflection divergence type image display should be provided with a power supply unit receiver input circuit that is provided with for the frequency that makes control circuit for pulse-width modulation portion is consistent with horizontal frequency.Above-mentioned power supply unit receiver input circuit is to be made of following structure: the horizontal output transformer that the horizontal drive signals that is exaggerated is input to first siding ring; Be configured to the winding state around the magnetic core with above-mentioned horizontal output transformer, and detect the induced signal detection lead of induced signal in above-mentioned horizontal output transformer; Detecting lead with above-mentioned induced signal links to each other, and receive by above-mentioned induced signal and detect the signal input that lead detects, and it is transformed to the waveform signal that uses in above-mentioned control circuit for pulse-width modulation portion, and it is outputed to the induced signal waveform transformation circuit part of above-mentioned control circuit for pulse-width modulation portion.
Advantage of the present invention and effect:
According to the present invention, during fabrication, can reduce the voltage stabilization circuit of the high pressure/deflection divergence type image display of part number, it not only reduces manufacturing expense, and improves operating efficiency and reduce the market fraction defective.
Description of drawings
Fig. 1 is the voltage stable circuit figure of the high pressure/deflection divergence type image display of conventional art.
Fig. 2 is the voltage stable circuit figure of high pressure of the present invention/deflection divergence type image display.
Among the figure, 100,200: control circuit for pulse-width modulation portion; T1: switching mode power supply transformer; T2: teaser transformer; T3: horizontal output transformer; 110: adjust compensating circuit portion; IC1: photoelectrical coupler; 120,220: power supply receiver input circuit portion; 124: horizontal drive signals amplifying circuit portion; 126: waveform transformation circuit part; 210: adjust bucking coil; 226: induced signal waveform transformation circuit part; 224: induced signal detects lead.
Embodiment
Below, with reference to accompanying drawing representative instance of the present invention is described in detail.At first, to the additional reference marks of the inscape of each drawing, same inscape also is expressed as same symbol as far as possible on other drawings even if will note.
Below, with reference to Fig. 2 the voltage stabilization circuit structure and the action thereof of high pressure of the present invention/deflection divergence type image display are specifically described.
Fig. 2 is the voltage stabilization circuit figure of high pressure of the present invention/deflection divergence type vision facilities.
As shown in Figure 2, the voltage stabilization circuit of high pressure of the present invention/deflection divergence type image display is made of following structure from big aspect: control circuit for pulse-width modulation portion 200; Switching mode power supply transformer T1; Transistor Q1; Adjust bucking coil 210 and power supply receiver input circuit portion 220 etc.Below each inscape is specifically described.
At first, the output of control circuit for pulse-width modulation portion 200 is to link to each other with above-mentioned transistor Q1 base stage, and the output pulse width modulator control signal.
The base stage of above-mentioned transistor Q1 links to each other with the output of above-mentioned control circuit for pulse-width modulation portion; Collector electrode links to each other with the first siding ring of switching mode power supply transformer T1; And grounded emitter.Above-mentioned transistor Q1 controls out and closes action by the pulse-width modulation control signal that is input to base stage.
Above-mentioned switching mode power supply transformer T1 first siding ring is to link to each other with the collector electrode of above-mentioned transistor Q1, and according to the pulse-width modulation control signal from the output of above-mentioned control circuit for pulse-width modulation portion, will be sent to second siding ring by induced voltage in first siding ring.That is, the above-mentioned pulse-width modulation control signal from above-mentioned control circuit for pulse-width modulation portion 200 output signals is input to transistor Q1 base stage; And the collector electrode of above-mentioned transistor Q1 is to link to each other with the first siding ring of above-mentioned switching mode power supply transformer T1.On the other hand, above-mentioned switching mode power supply transformer T1 second siding ring is and diode D1, and D2 and inductance L 1 and capacitor C 2 link to each other, and will carry out output dc voltage DC after the rectification to the voltage of second siding ring output.
Above-mentioned adjustment bucking coil 210 is to link to each other with first siding ring one end of the above-mentioned switching mode power supply transformer that is connected in above-mentioned transistor Q1 collector electrode, and the induced voltage that the second siding ring that is received in above-mentioned switching mode power supply transformer T1 transmits, and it is fed back to above-mentioned control circuit for pulse-width modulation portion 200.And above-mentioned control circuit for pulse-width modulation portion 200 is according to controlling pulse-width modulation control signal from the voltage level of above-mentioned adjustment bucking coil 210 feedbacks.
On the other hand, the voltage stabilization circuit of above-mentioned high pressure/deflection divergence type vision facilities, consistent for the frequency that makes above-mentioned control circuit for pulse-width modulation portion with horizontal frequency, also be provided with a power supply receiver input circuit portion 220.Above-mentioned power supply receiver input circuit portion 220 comprises horizontal output transformer T3, input signal detection lead 224 and induced signal waveform transformation circuit part 226 etc.
To the first siding ring of above-mentioned horizontal output transformer T3, import the horizontal drive signals that is exaggerated, and amplifying signal is sent to second siding ring.
Above-mentioned induced signal detects lead 224 and be configured to twine form around the magnetic core of above-mentioned horizontal output transformer T3, and detects the signal of responding to this in above-mentioned horizontal output transformer T3.
Detect the induced signal waveform transformation circuit part 226 that lead 224 links to each other with above-mentioned induced signal, receive and above-mentionedly detect the signal input that lead detects, and it is transformed to the waveform signal that can be used outputs to above-mentioned control circuit for pulse-width modulation portion 200 in above-mentioned control circuit for pulse-width modulation by induced signal.
As above-mentioned, in detailed description of the present invention, though concrete carrying out the explanation of related example, it is understandable that various different schemes can be arranged in not exceeding category limit of the present invention.Therefore scope of the present invention can not be limited to the example description and decides, but not only described in the back patent request scope decides, and should decide according to the condition with patent request scope equalization.
Claims (3)
1, the voltage stabilization circuit of high pressure/deflection divergence type image display is characterized in that it is to be made of following structure:
The control circuit for pulse-width modulation portion of output pulse width modulator control signal;
Base stage links to each other with above-mentioned control circuit for pulse-width modulation portion output, and receives the input of above-mentioned pulse-width modulation control signal, and the transistor that opens and closes according to above-mentioned pulse-width modulation control signal control;
First siding ring links to each other with above-mentioned transistor collector, and carries out Kai Heguan according to the pulse-width modulation control signal from the output of above-mentioned control circuit for pulse-width modulation portion, and will be sent to the switching mode power supply transformer of second siding ring at the voltage of first siding ring induction;
First siding ring one end of the above-mentioned switching mode power supply transformer that links to each other with above-mentioned transistor collector links to each other, and the induced voltage that the second siding ring that receives above-mentioned switching mode power supply transformer transmits, and it is fed back to the adjustment bucking coil of above-mentioned control circuit for pulse-width modulation portion;
Above-mentioned control circuit for pulse-width modulation portion is by controlling pulse-width modulation control signal from the voltage level of above-mentioned adjustment bucking coil feedback.
2, the voltage stabilization circuit of high pressure according to claim 1/deflection divergence type image display, the voltage stabilization circuit that it is characterized in that above-mentioned high pressure/deflection divergence type image display is to make the frequency of above-mentioned control circuit for pulse-width modulation portion consistent with horizontal frequency, is provided with a power supply receiver input circuit portion.
3, the voltage stabilization circuit of high pressure according to claim 2/deflection divergence type image display is characterized in that above-mentioned power supply receiver input circuit portion is made of following structure:
The horizontal drive signals that is exaggerated is input to the horizontal output transformer of first siding ring;
Be configured to twine form around the magnetic core with above-mentioned horizontal output transformer, and detect the induced signal detection lead of induced signal in the above-mentioned horizontal input transformer;
Detecting lead one end with above-mentioned induced signal links to each other, and receive by above-mentioned induced signal and detect the signal input that lead detects, and it is transformed to the waveform signal that can use in above-mentioned control circuit for pulse-width modulation portion, at last it is outputed to the induced signal waveform transformation portion of control circuit for pulse-width modulation portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021065 CN1641988A (en) | 2004-01-16 | 2004-01-16 | Voltage stabilizing circuit for high-voltage/deviational split type image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021065 CN1641988A (en) | 2004-01-16 | 2004-01-16 | Voltage stabilizing circuit for high-voltage/deviational split type image display device |
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| Publication Number | Publication Date |
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| CN1641988A true CN1641988A (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410021065 Pending CN1641988A (en) | 2004-01-16 | 2004-01-16 | Voltage stabilizing circuit for high-voltage/deviational split type image display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227778B (en) * | 2008-02-19 | 2011-12-14 | 东南大学 | Self-excited oscillation type high power LED constant-current driving circuit |
-
2004
- 2004-01-16 CN CN 200410021065 patent/CN1641988A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227778B (en) * | 2008-02-19 | 2011-12-14 | 东南大学 | Self-excited oscillation type high power LED constant-current driving circuit |
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