CN101685598A - Energy recovery circuit for plasma display panel - Google Patents
Energy recovery circuit for plasma display panel Download PDFInfo
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- CN101685598A CN101685598A CN 200810223481 CN200810223481A CN101685598A CN 101685598 A CN101685598 A CN 101685598A CN 200810223481 CN200810223481 CN 200810223481 CN 200810223481 A CN200810223481 A CN 200810223481A CN 101685598 A CN101685598 A CN 101685598A
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- diode
- igbt
- anode
- energy recovery
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Abstract
The present invention provides an energy recovery circuit for a plasma display panel, and the energy recovery circuit comprises a power transistor with the drain electrode connected with the cathodesof a first diode and a fourth diode and the source electrode connected with the anodes of a second diode and a third diode, wherein, the cathode of the third diode being connected with the anode of the fourth diode and the anode of the first diode being connected with the cathode of the second diode; a first insulated gate bipolar transistor (IGBT), a second IGBT, a third IGBT and a fourth IGBT, the emitters of the first IGBT and the second IGBT are respectively connected with the collectors of the third IGBT and the fourth IGBT; a panel capacitor with two ends connected with the emitters of the first IGBT and the third IGBT; a first inductor with two ends connected with the cathode of the third diode and the emitter of the first IGBT; a second inductor with two ends connected with the emitter of the third IGBT and the anode of the first diode. By adopting the present invention, circuit cost can be saved and energy recovery efficiency can be improved.
Description
Technical field
The present invention relates to a kind of circuit, relate in particular to a kind of energy recovery circuit that is used for plasma display.
Background technology
The displaying principle of plasma display (PDP) is the ultraviolet ray excited light-emitting phosphor that utilizes gas discharge to produce.Yet power consumption big in discharge process has increased circuit cost.In discharge process, PDP can be with a capacitor C
PdpCome equivalence, its impedance comprises the impedance when impedance between electrode of plasma display screen and igbt turn on and off.As voltage V
sWhen putting on the screen driving circuit, its energy loss is 2C in the single cycle
PdpV
s 2If its frequency is f, its energy loss is 2f C so
PdpV
s 2If do not adopt energy recovery apparatus, what the energy consumption of input supply terminal will be very so is big.By adopting energy recovery circuit, can be in screen electric capacity with this part energy back, thus can reduce the energy loss of input end power supply in the circuit.In general, energy recovery apparatus mainly is the minimizing that realizes energy loss by energy recovery circuit.Currently used energy recovery circuit power tube is MOSFET mostly, because the MOSFET price is higher, and the MOSFET quantity that adopts is more, so increased the cost and the complexity of circuit.
Therefore need the lower and better simply energy recovery circuit that is used for plasma display of structure of a kind of cost.
Summary of the invention
The object of the invention provides a kind of energy recovery circuit that is used for plasma display, to reach the saving circuit cost, improves energy recovery efficiency.
According to the energy recovery circuit that is used for plasma display of the present invention, comprise: power switch pipe (M5), its drain electrode links to each other with the negative electrode of the first, the 4th diode (D1, D4), its source electrode links to each other with the anode of second, third diode (D2, D3), wherein, the negative electrode of the 3rd diode (D3) links to each other with the anode of the 4th diode (D4), and the anode of first diode (D1) links to each other with the negative electrode of second diode (D2); The first, second, third and the 4th igbt (M1, M2, M3 and M4), the emitter of the first, the 3rd igbt (M1, M3) link to each other with the collector of the second, the 4th igbt (M2, M4) respectively; Screen electric capacity (C
Pdp), its two ends link to each other with the emitter of the first, the 3rd igbt (M1, M3) respectively; First inductor (L1), its two ends link to each other with the negative electrode of the 3rd diode (D3) and the emitter of first igbt (M1) respectively; And second inductor (L2), its two ends link to each other with the emitter of the 3rd igbt (M3) and the anode of first diode (D1) respectively; Wherein, the grid of the first, second, third and the 4th igbt (M1, M2, M3 and M4) and the grid of power switch pipe (M5) are connected respectively to the signal controlling end of control circuit, according to the signal of control circuit and conducting or shutoff.
Preferably, the above-mentioned energy recovery circuit that is used for plasma display, also comprise: the reverse protection diode, wherein: the negative electrode of first, second reverse protection diode (D5, D6) links to each other with the collector of first igbt (M1), and the anode of first, second reverse protection diode (D5, D6) links to each other with the anode of the 4th diode (D4) and the anode of first diode (D1) respectively; Three, the anode of the 4th reverse protection diode (D7, D8) links to each other with the emitter of second igbt (M2), and the negative electrode of the 3rd, the 4th reverse protection diode (D7, D8) links to each other with the anode of the 4th diode (D4) and the anode of first diode (D1) respectively;
Wherein, above-mentioned energy recovery circuit, the voltage peak on the screen electric capacity is near supply voltage.
Wherein, in the above-mentioned energy recovery circuit, can replace the first, second, third and the 4th igbt (M1, M2, M3 and M4) with four field effect transistors, also can improve energy recovery efficiency, just cost and power consumption still still have advantage than energy recovery circuit of the prior art than adopting the igbt height.
Wherein, above-mentioned energy recovery circuit, the voltage peak on the screen electric capacity is near supply voltage.
Wherein, in the above-mentioned energy recovery circuit, recover power device with a main energy and replace the high bottom energy in the conventional energy restoring circuit to recover power device.
Technical scheme of the present invention has following beneficial effect:
Energy recovery circuit according to the present invention has that input impedance height, operating rate are fast, Heat stability is good and the simple advantage of driving circuit, has low, the withstand voltage height of on state voltage again and bears advantages such as electric current is big.Therefore greatly reduce power consumption, and saved circuit cost, reduced the complexity of circuit, improved energy recovery efficiency simultaneously.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the interlock circuit synoptic diagram of simplifying during the energy recovery circuit resonance of the prior art;
Fig. 2 is used for the energy recovery circuit of plasma display according to the Current feedback based on IGBT of the embodiment of the invention; And
Fig. 3 is for being used for the respective switch control timing and the output waveform figure of the energy recovery circuit of plasma display according to the Current feedback based on IGBT of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
As shown in Figure 1, the interlock circuit of simplifying during the energy recovery circuit resonance of the prior art, it mainly comprises power tube (field effect transistor), inductor L, and capacitor C
PAs seen, that wherein power switch pipe all adopts is MOSFET, and quantity is more, thereby cost is higher; And circuit structure is complicated, and the energy recovery efficiency that this circuit is realized is lower.
Fig. 2 is used for the energy recovery circuit of plasma display according to the Current feedback based on IGBT of the embodiment of the invention.
Adopt a kind of circuit topological structure of novelty according to the energy recovery circuit of the embodiment of the invention, this circuit structure has adopted insulation coral bipolar transistor igbt at the phase power tube of keeping, and adopting a main energy to recover power device replaces energy in X driving circuit in the conventional energy restoring circuit and the Y driving circuit to recover the power device of high-end and low side, and saved energy and recovered electric capacity, the advantage of power field effect pipe and power transistor is rolled into one, promptly has the input impedance height, operating rate is fast, the simple advantage of Heat stability is good and driving circuit, it is low to have on state voltage again, withstand voltage height and bear advantages such as electric current is big.Therefore greatly reduce power consumption, and saved circuit cost greatly, reduced the complexity of circuit, improved energy recovery efficiency simultaneously.
As shown in Figure 2, in this energy recovery circuit, adopted igbt igbt to replace conventional energy to recover keeping high-end and keep the power tube MOSFET of low side in the driving circuit, the energy in the conventional energy restoring circuit recovers the power tube that electric capacity and energy recover high-end and low side and replaces with a main energy recovery switch in this energy restoring circuit simultaneously.That is to say the usage quantity that has reduced power device based on the Current feedback plasma energy restoring circuit of IGBT than conventional energy restoring circuit widely, simultaneously since igbt igbt to open resistance little, saturation pressure reduces, so can improve the efficient of system greatly, reduce power consumption, save cost.
The energy recovery circuit that is used for plasma display according to the embodiment of the invention comprises: by power switch pipe M
5, igbt M
1, M
2, M
3And M
4The switching tube of forming.Wherein, power switch pipe M
5Drain electrode and diode D
1And D
4Negative electrode link to each other power switch pipe M
5Source electrode and diode D
3And D
2Anode link to each other; Diode D
1Anode and D
2Negative electrode and inductance L
2An end be connected.Diode D
4Anode and D
3Negative electrode and inductance L
1An end be connected; Igbt M
1And M
3Emitter respectively with igbt M
2And M
4Collector be connected, be attempted by the two ends of screen capacitor C pdp; Inductance L
1An end and igbt M
1Emitter-base bandgap grading and M
2Collector be connected the other end and diode D
4Anode D
3Negative electrode connect.Same inductance L
2An end and igbt M
3Emitter-base bandgap grading and M
4Collector be connected the other end and diode D
1Anode and D
2Negative electrode connect.Igbt M
2And M
4Grounded emitter.Power switch pipe M
5, igbt M
1, M
2, M
3And M
4Grid is the signal controlling end of connection control circuit respectively, by the control signal that control circuit provides, controls opening or turn-offing of each switching tube.
Preferably, this energy recovery circuit also comprises reverse protection diode D5-D8, with the damage of protection power switch pipe M1-M4.
Wherein, the negative electrode of reverse protection diode D5, D6 is connected with the collector of igbt M1, and the anode of reverse protection diode D5, D6 is connected with the anode of diode D1 with diode D4 respectively;
The anode of reverse protection diode D7, D8 is connected with the emitter of igbt M2, and the negative electrode of reverse protection diode D7, D8 is connected with the anode of diode D1 with diode D4 respectively.
The driving sequential and the output waveform of this circuit see below described.
Fig. 3 is respective switch control timing and the output waveform figure according to the energy recovery circuit that is used for plasma display of the embodiment of the invention.
Referring to Fig. 3, the conducting sequential of this energy recovery circuit power device.
In the phase of keeping, a cycle period is divided into four-stage: suppose at initial time igbt M
2And M
3Conducting, igbt M
1And M
4And power tube M
5End.Shield capacitor C so
PdpLast voltage V
CpdpMaintenance-V
sConstant.
At first stage (t
0-t
1), igbt M
2And M
3By (this moment igbt M
1And M
4Still power tube M remain off),
5Conducting, at this moment, capacitor C
PdpPass through inductance L
2, diode D
1, power tube M
5, diode D
3, and inductance L
1Series resonance takes place, and it shields capacitor C
PdpLast voltage V
CpdpAnd current i
CpdpVariation relation is as follows in time:
V
cpdp(t)＝-V
scos(ω(t-t
0))(1)
Wherein
Be resonance frequency, wherein L is the inductance value of inductor L1 or L2, and Cp is capacitor C
PdpCapacitance.
Above-mentioned series resonance process has been avoided the screen electric capacity impulse electricity process of suddenling change in the traditional circuit.
At second stage (t
1-t
2), when inductive current equals 0, screen capacitance voltage C
PdpEqual V
s, this moment igbt M
4And M
1Conducting (igbt M at this moment,
2And M
3Still power tube M remain off),
5By, the screen capacitance voltage keeps V
sConstant.
At three phases (t
2-t
3), igbt M
4And M
1By (igbt M at this moment,
2And M
3Still power tube M remain off),
5Conducting, capacitor C
PdpPass through inductance L
1, diode D
4, power tube M
5, diode D
2, and inductance L
2Series resonance takes place, and its principle of work is identical with the phase one.
At four-stage (t
3-t
4), igbt M
2And M
3Conducting (igbt M at this moment,
1And M
4Still power tube M remain off),
5By, screen capacitance voltage maintenance-V
sConstant.
In this circuit, each igbt all is operated in soft on off state.
From (1) formula as can be seen, screen capacitance voltage peak value approaches V
s, screen capacitance voltage peak value approaches V in this and the conventional energy restoring circuit
s/ 2 have significant difference, have improved energy recovery efficiency widely.
In sum, realized following technique effect by technical scheme of the present invention:
The present invention is by adopting a kind of circuit topological structure of novelty, and keep the phase power tube and adopt igbt igbt, remove energy and recovered power device high-end and low side, save energy and recovered electric capacity, thereby saved circuit cost greatly, reduce the complexity of circuit, improved energy recovery efficiency simultaneously.
Be embodiments of the invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (5)
1. an energy recovery circuit that is used for plasma display is characterized in that, comprising:
Power switch pipe (M5), its drain electrode links to each other with the negative electrode of the first, the 4th diode (D1, D4), its source electrode links to each other with the anode of second, third diode (D2, D3), wherein, the negative electrode of described the 3rd diode (D3) links to each other with the anode of described the 4th diode (D4), and the anode of described first diode (D1) links to each other with the negative electrode of described second diode (D2);
The first, second, third and the 4th igbt (M1, M2, M3 and M4), the emitter of described the first, the 3rd igbt (M1, M3) link to each other with the collector of the second, the 4th igbt (M2, M4) respectively;
Screen electric capacity (C
Pdp), its two ends link to each other with the emitter of described the first, the 3rd igbt (M1, M3) respectively;
First inductor (L1), its two ends link to each other with the negative electrode of described the 3rd diode (D3) and the emitter of first igbt (M1) respectively; And
Second inductor (L2), its two ends link to each other with the emitter of the 3rd igbt (M3) and the anode of described first diode (D1) respectively;
Wherein, the grid of the described first, second, third and the 4th igbt (M1, M2, M3 and M4) and the grid of described power switch pipe (M5) are connected respectively to the signal controlling end of control circuit, according to the signal of described control circuit and conducting or shutoff.
2. the energy recovery circuit that is used for plasma display according to claim 1 is characterized in that, also comprises: the reverse protection diode, wherein:
The negative electrode of first, second reverse protection diode (D5, D6) links to each other with the collector of described first igbt (M1), and the anode of described first, second reverse protection diode (D5, D6) links to each other with the anode of described the 4th diode (D4) and the anode of described first diode (D1) respectively;
Three, the anode of the 4th reverse protection diode (D7, D8) links to each other with the emitter of described second igbt (M2), and the negative electrode of described the 3rd, the 4th reverse protection diode (D7, D8) links to each other with the anode of described the 4th diode (D4) and the anode of described first diode (D1) respectively;
3. the energy recovery circuit that is used for plasma display according to claim 1 and 2 is characterized in that: the voltage peak on the described screen electric capacity is near supply voltage.
4. the energy recovery circuit that is used for plasma display according to claim 1 and 2 is characterized in that:
Replace the first, second, third and the 4th igbt (M1, M2, M3 and M4) with described four field effect transistors.
5. the energy recovery circuit that is used for plasma display according to claim 3 is characterized in that:
Recovering power device with a main energy replaces the high bottom energy in the conventional energy restoring circuit to recover power device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810223481 CN101685598A (en) | 2008-09-28 | 2008-09-28 | Energy recovery circuit for plasma display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810223481 CN101685598A (en) | 2008-09-28 | 2008-09-28 | Energy recovery circuit for plasma display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101685598A true CN101685598A (en) | 2010-03-31 |
Family
ID=42048732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810223481 Pending CN101685598A (en) | 2008-09-28 | 2008-09-28 | Energy recovery circuit for plasma display panel |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814266A (en) * | 2010-04-27 | 2010-08-25 | 四川长虹电器股份有限公司 | Method for driving IGBT in PDP display screen line driving chip |
-
2008
- 2008-09-28 CN CN 200810223481 patent/CN101685598A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814266A (en) * | 2010-04-27 | 2010-08-25 | 四川长虹电器股份有限公司 | Method for driving IGBT in PDP display screen line driving chip |
| CN101814266B (en) * | 2010-04-27 | 2011-12-07 | 四川长虹电器股份有限公司 | Method for driving IGBT in PDP display screen line driving chip |
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Application publication date: 20100331 |