CN1971690A - Driving device of plasma display panel - Google Patents
Driving device of plasma display panel Download PDFInfo
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- CN1971690A CN1971690A CNA2006101417154A CN200610141715A CN1971690A CN 1971690 A CN1971690 A CN 1971690A CN A2006101417154 A CNA2006101417154 A CN A2006101417154A CN 200610141715 A CN200610141715 A CN 200610141715A CN 1971690 A CN1971690 A CN 1971690A
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- inductor
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- energy
- display panel
- plasma display
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- 239000000758 substrate Substances 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims description 35
- 238000004146 energy storage Methods 0.000 claims description 25
- 238000004064 recycling Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
- G09G3/2965—Driving circuits for producing the waveforms applied to the driving electrodes using inductors for energy recovery
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The inventin is a related invention of a power recycle circuit of a plasma display panel driving device. The plasma display panel driving device of the invention includes a recycle circuit which provides power stored in a power storage unit to a substrate and recycles the power, is characterised in that the power recycle circuit has a first inductor providing the power stored in the power storage unit to the substrate; a second inductor recycling the power provided to the substrate to the power storage unit via a path different to the first inductor, the first inductor and the second inductor have different inductance. Preferably, the second inductor is provided with an inductance value which is two times of the inductance value of the first inductor. In this way, with the inductors which are configured with different inductance values during power supply and power recycle, the invention can simplifies the circuit and reduces cost by removing a plurality of clamping diodes, while increases power recycle efficiency.
Description
Technical field
The present invention is the plasma display panel related invention, more specifically says so and improves the driving device of plasma display panel related invention of energy recovery efficiency.
Background technology
Common driving device of plasma display panel is the discharge of keeping selected string, comprises alternately applying the driving circuit of keeping of keeping pulse to Y electrode and Z electrode.This driving circuit of keeping is included in Y electrode drive portion and Z electrode drive portion respectively, and the driving circuit of keeping of plasma display panel adopts energy recovering circuit at present.
Above-mentioned energy recovering circuit offers the energy of plasma display panel by recovery, provides it to plasma display panel again, improves the service efficiency of energy.
Fig. 1 is for showing the circuit diagram of traditional energy recovering circuit, and Fig. 2 is the drive waveforms of demonstration conventional energy recovery circuit and the curve of current characteristics.
As shown in the figure, traditional energy recovering circuit is formed by the 1st to the 4th switch S 1 that is connected to substrate Cp, S2, S3, S4 with by capacitor C ss and inductor (inductor) L, and its mode of operation is divided into the 4 following stages:
At first, at the 1st state state1, have only the 1st switch S 1 to be activated, the 2nd to the 4th switch S 2, S3, S4 then are closed.Thus, along with the energy that is stored among the capacitor C ss offers substrate Cp, Vp voltage rises gradually.At the 1st state, as shown in Figure 2, the electric current of the inductor L that flows through is provided to substrate Cp with energy from capacitor C ss, therefore becomes+IL.
Thereafter, at the 2nd state state2, the 1st switch S 1 and the 2nd switch S 2 are together started, and the 3rd switch S 3 and 4 of the 4th switch S are closed.Thus, Vp becomes from the 1st reference voltage of the 2nd switch S 2 supplies, promptly becomes and keeps voltage vcc.
More particularly, from the moment that finishes at the 1st state state1, promptly the t1 time point that becomes maximal value Vcc according to LC resonance Vp begins, and applies to substrate Cp and keeps voltage vcc.
Afterwards, at the 3rd state state3, have only the 3rd switch S 3 to be activated, the 1st switch S the 1, the 2nd switch S 2 and 4 of the 4th switch S are closed.Thus, the energy that is stored in substrate Cp is recovered by capacitor C ss discharge, and Vp voltage then descends gradually.At the 3rd state, as shown in Figure 2, electric current flows to capacitor C ss from substrate Cp, and the inductor L electric current of therefore flowing through becomes reverse, promptly-and IL.
At last, at the 4th state state4, the 3rd switch S 3 and the 4th switch S 4 are activated, and the 1st switch S 1 and 2 of the 2nd switch S are closed.Vp becomes the voltage of earth level (groundlevel) thus.
More particularly, from moment that the 3rd state state3 finishes promptly, the t2 time point begins the 4th state state4, the voltage Vp that provides to substrate Cp is maintained earth level.
Above-mentioned traditional energy recovering circuit is energy recovery and supply, includes only an inductor L.Therefore therefore, by an inductor L, energy offers substrate, recovers energy from substrate, supplies identically with the path of current that recovers energy, and having only sense of current is inverse operation.
And, adopt above-mentioned inductor L to supply substrate and the voltage reference that recovers energy, drive in charging (charge) by Css, always keep Css=Vcc/2 voltage during actual the driving.Its reason is: when ideal operation, energy recovery and supply are that same inductor L realizes, therefore according to operation uniformly, the voltage of Css will be kept the intermediate value of Vcc and earth level.
Simultaneously, if this traditional energy recovering circuit then produces a lot of paths at inductor,, proposed to adopt the scheme of 2 coil energy recovery circuits of 2 inductors in order to address this is that.
Fig. 3 is for showing the circuit diagram of 2 traditional coil energy recovery circuits.
As shown in the figure, the composition of 4 FET switch Q1-Q4 that the energy recovery of 2 traditional coil energy recovery circuits is established with electric capacity C1 with for energy supply and recovery and the energy recovering circuit of effect and Fig. 1 are similar, just with energy supply (er_up) and the line when reclaiming (er_dn) separate, dispose separately inductor L1 and L2 respectively.
At this moment, above-mentioned inductor L1, L2 use the inductance value of each 0.6uH side by side, all are suitable for the inductance value of 0.3uH when energy supply (er_up) and recovery (er_dn).
And, keep noise (ringing) composition of (sustain) waveform for removing, near each the 1st and the 2nd switch, be provided with catching diode D1 and D2.
But this traditional 2 coil energy recovery circuits for improving energy recovery efficiency, help disposing the inductor of high inductance value when energy recovery (er_dn).But exist in the conventional art, energy supply (er_up) during with energy recovery (er_dn) because of disposing the inductor of identical value, and the problem of decline energy recovery efficiency.
And, because of being equipped with a plurality of catching diodes, there is the circuit complexity, improve the problem of expense.
Summary of the invention
In order to address the above problem, driving device of plasma display panel provided by the invention improves energy recovery efficiency by the inductor of configuration different value when energy supply and energy recovery.Simultaneously, by removing a plurality of catching diodes, can simplify circuit, the reduction expense.
In order to achieve the above object, the present invention realizes by following scheme:
Driving device of plasma display panel, comprise that the energy that will be stored in the energy storage part offers substrate, and the recovery circuit that recovers energy, it is characterized in that above-mentioned energy recovering circuit is equipped with: the energy that will be stored in above-mentioned energy storage part offers the 1st inductor of aforesaid substrate; By with the different path of above-mentioned the 1st inductor, will offer the energy recovery of aforesaid substrate to the 2nd inductor of above-mentioned energy storage part, above-mentioned the 1st inductor has different inductance value with above-mentioned the 2nd inductor.
Aforesaid driving device of plasma display panel is characterized in that above-mentioned the 2nd inductor has than the high inductance value of above-mentioned the 1st inductor.
Aforesaid driving device of plasma display panel is characterized in that above-mentioned the 2nd inductor gets 2 times inductance value of above-mentioned the 1st inductor.
Aforesaid driving device of plasma display panel is characterized in that above-mentioned the 1st inductor is suitable for the inductance value of about 0.3uH, the suitable about 0.6uH of above-mentioned the 2nd inductor.
Aforesaid driving device of plasma display panel is characterized in that above-mentioned the 1st inductor is the energy supply control part through being made up of the 1st switch, is connected to above-mentioned energy storage part.
Aforesaid driving device of plasma display panel is characterized in that above-mentioned the 2nd inductor is the energy recovery control part of forming through by the 2nd switch, is connected to above-mentioned energy storage part.
The invention has the beneficial effects as follows: as mentioned above, driving device of plasma display panel of the present invention, configuration has the inductor of different value when energy supply and energy recovery, thereby improves energy recovery efficiency, disperse to concentrate on the load of an inductor coil, thereby reduced heat.Simultaneously, delete a plurality of catching diodes, therefore had and to simplify circuit, reduced the effect of expense
Description of drawings
Fig. 1 is for showing the circuit diagram of traditional energy recovering circuit.
Fig. 2 is the oscillogram of display driver waveform and current characteristics.
Fig. 3 is for showing the circuit diagram of 2 traditional coil energy recovery circuits.
Fig. 4 is the circuit diagram of the energy recovering circuit of demonstration driving device of plasma display panel of the present invention.
Fig. 5 is the oscillogram of the drive waveforms of demonstration energy recovering circuit of the present invention.
Major part symbol description among the figure
110: 120: the 1 reference voltage supply departments of energy supply control part
130: 140: the 2 reference voltage supply departments of energy recovery control part
150: energy storage part Cp: substrate
Q1-Q4:FET switch D1-D8: diode
L1, L2: inductor C1: electric capacity
Embodiment
Below, serve as with reference to introducing preferred example of the present invention with additional picture.
Fig. 4 is the circuit diagram of the energy recovering circuit of demonstration driving device of plasma display panel of the present invention, and Fig. 5 is the oscillogram of the drive waveforms of demonstration energy recovering circuit of the present invention.
As shown in the figure, the present invention offers substrate Cp to comprise the energy that will be stored in energy storage part 150, and the driving device of plasma display panel of the recovery circuit that recovers energy, and comprising: energy supply control part 110; The 1st reference voltage supply department 120; Energy recovery control part 130; The 2nd reference voltage supply department 140; Energy storage part 150 and the energy that will be stored in above-mentioned energy storage part 150 offer a plurality of inductor L1, the L2 of aforesaid substrate Cp and recovery.
Above-mentioned energy storage part 150 comprises capacitor C 1.
The energy that the 1st inductor L1 will be stored in above-mentioned energy storage part 150 offers aforesaid substrate Cp, and the 2nd inductor L2 will be by being provided to the energy recovery of aforesaid substrate Cp to above-mentioned energy storage part 150 with the different paths of above-mentioned the 1st inductor L1.
Above-mentioned the 1st inductor L1 and above-mentioned the 2nd inductor L2 have mutually different inductance value.At this moment, above-mentioned the 2nd inductor L2 has the higher inductance value than above-mentioned the 1st inductor L1,2 times the value that best above-mentioned the 2nd inductor L2 gets above-mentioned the 1st inductor L1.
And, above-mentioned the 1st inductor L1 is the energy supply control part 110 through being made up of the 1st switch Q1, be connected to above-mentioned energy storage part 150, above-mentioned the 2nd inductor L2 is the energy recovery control part of forming through by the 3rd switch Q3 130, is connected to above-mentioned energy storage part 150.
The energy recovering circuit effect of more specifically introducing the example of the present invention with this structure is as follows:
At first, have only the 1st switch Q1 of energy supply control part 110 to be activated at the 1st state, remaining the 2nd switch to the 4 switch Q2-Q4 is closed.
Therefore, the voltage Vs of the capacitor C 1 of energy storage part 150 is supplied to substrate Cp via the 1st inductor L1.At this moment, above-mentioned the 1st inductor L1 is suitable for the inductance value of 0.3uH.
Afterwards, have only the 1st switch Q1 and the 2nd switch Q2 to be started together at the 2nd state, the 3rd switch Q3 and the 4th switch Q4 then are closed.
Thus, in substrate Cp, keep certain hour from the voltage vcc of keeping of the 2nd switch Q2 supply.
Afterwards, have only the 3rd switch Q3 to be activated at the 3rd state, rest switch Q1, Q2, Q4 are closed.
Thus, the energy that is stored in substrate Cp is recycled to the capacitor C 1 of energy storage part 150 via the 2nd inductor L2.At this moment, above-mentioned the 2nd inductor L2 is suitable for 2 times the value of above-mentioned the 1st inductor L1, the i.e. inductance value of 0.6uH.
At the 4th state, have only the 4th switch Q4 to be activated, rest switch Q1-Q3 then is closed, and the voltage that is applied to substrate Cp thus becomes ground voltage.
So, the 1st inductor L1 is that the energy that will be stored in the above-mentioned energy storage part 150 offers substrate Cp, the 2nd inductor L2 is that the energy that will offer aforesaid substrate Cp is recycled to energy storage part 150 again, can maximize energy recovery efficiency thus, can disperse to concentrate in the conventional art load of an inductor coil, thereby reduce heat.
And, above-mentioned the 1st inductor L1 is the energy supply control part 110 through being made up of the 1st switch Q1, be connected to above-mentioned energy storage part 150, above-mentioned the 2nd inductor L2 is the energy recovery control part of forming by by the 3rd switch Q3 130, is connected to above-mentioned energy storage part 150.
So,, have the 1st inductor L1 and the 2nd inductor L2 of different value, as shown in Figure 5, can fully have been lowered the waveform of noise (ringing) composition by configuration though the present invention has deleted a plurality of catching diodes of traditional elimination noise contribution.Therefore, delete traditional a plurality of catching diodes, can simplify circuit thus, the reduction expense.
Above-mentioned enforcement does not limit the present invention in any form, and all technical schemes that form obtained of taking to be equal to replacement or equivalent transformation all drop within protection scope of the present invention.
Claims (6)
1, driving device of plasma display panel, comprise that the energy that will be stored in the energy storage part offers substrate, and the recovery circuit that recovers energy, it is characterized in that above-mentioned energy recovering circuit is equipped with: the energy that will be stored in above-mentioned energy storage part offers the 1st inductor of aforesaid substrate; By with the different path of above-mentioned the 1st inductor, will offer the energy recovery of aforesaid substrate to the 2nd inductor of above-mentioned energy storage part, above-mentioned the 1st inductor has different inductance value with above-mentioned the 2nd inductor.
2, driving device of plasma display panel according to claim 1 is characterized in that above-mentioned the 2nd inductor has than the high inductance value of above-mentioned the 1st inductor.
3,, it is characterized in that above-mentioned the 2nd inductor gets 2 times inductance value of above-mentioned the 1st inductor according to claim 1 or the described driving device of plasma display panel of claim 2.
4, driving device of plasma display panel according to claim 3 is characterized in that above-mentioned the 1st inductor is suitable for about 0.3uH, above-mentioned the 2nd inductor is suitable for about 0.6uH inductance value.
5, driving device of plasma display panel according to claim 1 is characterized in that above-mentioned the 1st inductor is the energy supply control part through being made up of the 1st switch, is connected to above-mentioned energy storage part.
6, driving device of plasma display panel according to claim 1 is characterized in that above-mentioned the 2nd inductor is the energy recovery control part of forming through by the 2nd switch, is connected to above-mentioned energy storage part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050096758A KR20070087749A (en) | 2005-10-13 | 2005-10-13 | Plasma Display Panel Driver |
| KR1020050096758 | 2005-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1971690A true CN1971690A (en) | 2007-05-30 |
Family
ID=38112477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101417154A Pending CN1971690A (en) | 2005-10-13 | 2006-09-27 | Driving device of plasma display panel |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20070087749A (en) |
| CN (1) | CN1971690A (en) |
-
2005
- 2005-10-13 KR KR1020050096758A patent/KR20070087749A/en not_active Ceased
-
2006
- 2006-09-27 CN CNA2006101417154A patent/CN1971690A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070087749A (en) | 2007-08-29 |
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