CN101030349B - Energy recovery circuit and driving apparatus of display panel - Google Patents

Energy recovery circuit and driving apparatus of display panel Download PDF

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Publication number
CN101030349B
CN101030349B CN2007100031993A CN200710003199A CN101030349B CN 101030349 B CN101030349 B CN 101030349B CN 2007100031993 A CN2007100031993 A CN 2007100031993A CN 200710003199 A CN200710003199 A CN 200710003199A CN 101030349 B CN101030349 B CN 101030349B
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China
Prior art keywords
switching device
terminal
energy
voltage
decline
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CN2007100031993A
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Chinese (zh)
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CN101030349A (en
Inventor
崔学起
丁南声
宋晙源
李周烈
李明奎
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Priority claimed from KR1020060035362A external-priority patent/KR100759575B1/en
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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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/24—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the field-effect type only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/01—Modifications for accelerating switching
    • H03K19/017—Modifications for accelerating switching in field-effect transistor circuits
    • H03K19/01728—Modifications for accelerating switching in field-effect transistor circuits in synchronous circuits, i.e. by using clock signals
    • H03K19/01735—Modifications for accelerating switching in field-effect transistor circuits in synchronous circuits, i.e. by using clock signals by bootstrapping, i.e. by positive feed-back
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes

Abstract

A driving apparatus of a plasma display panel (PDP) operates stably and reliably. The driving apparatus to drive the PDP includes a pulse application unit which applies a pulse to the PDP; and an energy recovery unit which comprises an inductor which generates LC resonance with a panel capacitor element of the PDP, an energy recovery determiner which determines the accumulation of energy during the LC resonance or emission of the accumulated energy to the PDP, and an energy storage unit which stores the accumulated energy, wherein the energy recovery determiner comprises a first falling switching device which determines the accumulation of the energy; and a second falling switching device which is connected between the first falling switching device and the energy storage unit, in order for the second falling switching device to form a current path toward the energy storage unit.

Description

The energy recovering circuit of display pannel and drive unit
The cross reference of related application
The application requires following three rights and interests that are filed in the patented claim of Korea S Department of Intellectual Property, promptly, at the korean patent application No.2006-19291 of submission on February 28th, 2006, at the korean patent application No.2006-35362 of submission on April 19th, 2006 and the korean patent application No.2006-105815 that submits on October 30th, 2006, the disclosure of mentioned patented claim is incorporated into this by reference.
Technical field
Each side of the present invention relates to the drive unit of a kind of plasm display panel (PDP), and more specifically, relates to a kind of energy recovering circuit that is contained in the drive unit, and it can be realized when recovering energy that switching device is stable and work reliably.
Background technology
Plasm display panel (PDP) is a kind of flat type display device with broad screen, it shows desirable image by applying sparking voltage between the substrate that all has a plurality of electrodes at two, and wherein discharge gas is limited between two substrates and the ultraviolet ray that is used for producing the fluorescence excitation pattern.
The drive unit of a kind of PDP comprises: a plurality of drive integrated circults (IC) of the switch work of a plurality of power supplys, a plurality of switching device and gauge tap device, thus drive signal is applied in a plurality of electrodes that are arranged among the PDP each.The drive unit of PDP comes output drive signal by the switch work of using described a plurality of switching devices.The drive unit of PDP can be divided into pulse applying unit and energy recovery unit.The pulse applying unit is applied to PDP with pulse, and energy recovery unit reclaims and stored energy (wall electric charge) from the discharge cell of PDP inside, and wherein said discharge is realized by the pulse that the pulse applying unit is applied, thereby reduced unnecessary power loss.
Energy recovery unit comprises switching device, is used for the inductance device of resonance, stores the capacitive device of (wall electric charge) or the like that recovers energy.At this, switching device is driven by switch controlling signal.Switch controlling signal is exported from the integrated circuit that is commonly referred to drive IC with the form of pulse.Be the switch controlling signal process capacitor of impulse form, thereby remove DC composition wherein, and therefore make the waveform distortion of switch controlling signal.Because the distortion of switch controlling signal, switching device produces too much heat and may burn.These problems betide in the switching device that is using in energy recovery unit recovers energy especially.
Summary of the invention
Each side of the present invention comprises a kind of drive unit that operates steadily and be used for plasm display panel (PDP) reliably.
According to an aspect of the present invention, the drive unit that is used to drive PDP (plasm display panel) comprises: the pulse applying unit, and it applies pulse to described PDP; Energy recovery unit, it comprises: inductor, the capacitive component of the panel capacitor of itself and described PDP produces LC resonance; The energy recovery determinant, its determine the energy accumulating during described LC resonance or the energy assembled to the transmission of described PDP; And energy storage units, it stores the energy of described gathering, and wherein said energy recovery determinant comprises: the first decline switching device, it determines the gathering of described energy; With the second decline switching device, it is connected between described first decline switching device and the described energy storage units, thereby make the current path of described second decline switching device formation towards described energy storage units, wherein said first decline switching device and the described second decline switching device can be FET (field effect transistor), and their source terminal is connected publicly, and wherein a boottrap capacitor can be connected to described public source terminal, and described boottrap capacitor can be by the internal body diodes along the described first decline switching device, the path that the ground terminal of described inductor and described pulse applying unit is formed and charging.
The described second decline switching device can be connected and described first decline switching device and described energy recovery unit between, from but the internal body diodes of the described second decline switching device forms the current path towards described energy storage units.
Can import a public switch controlling signal to the gate terminal of described first decline switching device and the described second decline switching device.
Described energy recovery determinant further comprises: the rising switching device, and it determines that the energy of being assembled that will be stored in described energy storage units sends to described PDP; And diode, it is for being sent to the energy of described gathering the unidirectional conduction device of described PDP.
Described pulse applying unit comprises: first voltage source, and it supplies with first voltage; The first voltage switch device, it switches described first voltage and described first voltage is sent to described PDP; Second voltage source, it supplies with second voltage; With the second voltage switch device, it switches described second voltage and is sent to described PDP with described.
Second voltage can be ground voltage.
Described energy storage units can comprise s energy storage capacitor, and it is connected between described ground terminal and the described energy recovery determinant.
Described pulse can be to be used for producing the pulse of keeping of keeping discharge at discharge cell, and described discharge cell is a selected discharge cell in a plurality of discharge cells from be contained in described PDP.
Described pulse can be addressing pulse, select in the discharge cell of this addressing pulse from be contained in described PDP will conducting discharge cell.
According to another aspect of the present invention, the drive unit that drives PDP (plasm display panel) comprises: the pulse applying unit, and it is applied to described PDP with pulse; And energy recovery unit, it comprises: inductor, and the capacitive component of the panel capacitor of itself and described PDP produces LC resonance; The energy recovery determinant, its determine the energy accumulating during described LC resonance or the energy assembled to the transmission of described PDP; And energy storage units, it stores the energy of described gathering, and wherein said energy recovery determinant comprises: the decline switching device, it determines the gathering of described energy; With the decline diode, it is unidirectional conduction device and is connected between described decline switching device and the described energy storage units, thereby form current path from described decline switching device to described energy storage units, wherein said decline switching device can be FET, and the source terminal of described FET can be connected to described decline diode, and wherein a boottrap capacitor is connected to described source terminal, and described boottrap capacitor can be by the internal body diodes along the described first decline switching device, the path that the ground terminal of described inductor and described pulse applying unit is formed and charging.
Described drive unit further comprises: the switching device driver element, and it is electrically connected to the drive terminal of described decline switching device, thereby applies high level voltage or low level voltage to drive described decline switching device; And wherein said boottrap capacitor is connected between the electric power feeding terminal of the electric power feeding terminal of described high level voltage and described low level voltage.
Described drive unit may further include the switching device driver element, and it is electrically connected to the gate terminal of described decline switching device, thereby applies high level voltage or the described decline switching device of low level voltage one driving.
Described switching device driver element may further include amplifier, the signal of the described decline switching device operation of its response control, and output high level voltage or low level voltage.
One end of described boottrap capacitor can be electrically connected to high level power input end of described amplifier, and the other end of described boottrap capacitor can be electrically connected to low level power input end of described amplifier and the source terminal of described decline switching device.
Described switching device driver element may further include bootstrap diode, and it is electrically connected between the described end of driving voltage source and described boottrap capacitor.
Described switching device driver element may further include: first resistor, and it is electrically connected between the gate terminal of the lead-out terminal of described amplifier and described decline switching device; With second resistor, it is electrically connected between the source terminal of the lead-out terminal of described amplifier and described decline switching device.
Described low level voltage can be a ground voltage.
According to a further aspect of the invention, energy recovering circuit in a kind of display pannel is provided, has panel capacitor between at least two strip electrode circuits of described display pannel in many strip electrodes circuit, wherein said energy recovering circuit reclaims electric energy or electric energy is applied to described panel capacitor from described panel capacitor, described energy recovering circuit comprises: energy storage units, and it charges by reclaiming electric energy from described panel capacitor; The energy recovery determinant, the electric energy of its control from described energy storage units to described panel capacitor applies or electric energy reclaims; And inductor, the one end is connected to an end of described energy recovery determinant, the other end is connected to described panel capacitor, wherein said energy recovery determinant comprises: rising switching device and decline switching device, it is connected between described energy storage units and the described inductor in parallel, the rising diode, it is connected between described rising switching device and the described inductor, so that electric current flows to described inductor from described rising switching device, with the decline diode, it is connected between described decline switching device and the described energy storage units, so that electric current flows to described energy storage units from described decline switching device.
Described rising switching device and described decline switching device can include switching device and drive the rising switching device driver element and the decline switching device driver element of each switching device.
A terminal of described rising switch drive unit can be connected to first voltage source, and another terminal of described rising switching device driver element can be connected between described rising switching device and the described rising diode.
Described rising switching device can comprise the first terminal that is connected to described energy storage units, second terminal that is connected to described rising diode and the 3rd terminal, and wherein the electric current that flows to described second terminal from described the first terminal is applied to the signal controlling of described the 3rd terminal.
Described rising switching device can be FET, and wherein said the first terminal is a drain terminal, and described second terminal is a source terminal, and described the 3rd terminal is a gate terminal.
Described rising switching device driver element can comprise driving element, and this driving element applies by the signal of the 3rd terminal of input signal control from described first voltage source to described first gauge tap.
Described driving element can comprise: driving signal input that applies described input signal; Be connected to the described first voltage source electric power and apply terminal; And lead-out terminal, it is connected to the 3rd terminal of described first gauge tap.
Described electric power applies terminal and can be connected between described rising switching device and the described rising diode through first capacitor.
According to various aspects of the present invention, connect by decline switching device common source, and do not use the DC coupling capacitance energy recovery unit, driving voltage can be applied stably, decline switching device stable working, and therefore reach stability.
According to an aspect of the present invention, the energy recovering circuit of display comprises: inductor, and it is connected to described display; Energy storage units, it recovers energy from described display; And energy recovery unit, it is connected between described inductor and the described energy storage units, and wherein said energy recovery unit has: first unidirectional path, it supplies to described display with energy from described energy storage units; With second unidirectional path, it recovers energy from described display, and described first and second unidirectional paths have the like of parallel arranged, wherein said energy recovery determinant comprises rising switching device and rising diode, and first the decline switching device and the second decline switching device, wherein after the rising diode is arranged in described rising switching device described in described first unidirectional path, and after the second decline switching device described in described second unidirectional path is arranged in the described first decline switching device, wherein said first decline switching device and the described second decline switching device are field effect transistor FET, and their source terminal is connected publicly, and wherein said drive unit further comprises: boottrap capacitor, it is connected to described public source terminal, and described boottrap capacitor is by the internal body diodes along the described first decline switching device, the path that the ground terminal of described inductor and described pulse applying unit is formed and charging.
Obtain part during other each side of the present invention and/or advantage will be described below and set forth, and a part will become clear from this instructions, perhaps can obtain cognition by practice of the present invention.
Description of drawings
These and/or others of the present invention and advantage will be understood by hereinafter in conjunction with the accompanying drawings the description of each side being become clear and is easier to, in the accompanying drawings:
Fig. 1 is a view of describing the plasm display panel (PDP) that is driven by according to an aspect of the present invention drive unit;
Fig. 2 is a view of describing the electrode spread among the PDP of Fig. 1;
Fig. 3 is a structural drawing of describing the drive unit of the PDP that drives Fig. 1;
Fig. 4 is the schematic sequential chart of describing from the drive signal of described each the driver element output of Fig. 3;
Fig. 5 describes from the oscillogram of keeping pulse in the described drive signal of Fig. 4;
Fig. 6 is a circuit diagram of describing the drive unit of PDP according to an aspect of the present invention;
Fig. 7 is a view of describing the drive integrated circult (IC) that drives described the 4th switching device of Fig. 6;
Fig. 8 is a circuit diagram of describing the drive unit of PDP according to an aspect of the present invention;
Fig. 9 is a view of describing the drive IC that drives the described first and second decline switching devices of Fig. 8;
Figure 10 is a circuit diagram of describing the drive unit of PDP according to a further aspect in the invention;
Figure 11 is a view of describing the switching device driver element that drives the described decline switching device of Figure 10;
Figure 12 describes the energy recovering circuit of PDP according to a further aspect in the invention and the circuit diagram of drive unit.
Embodiment
Now will be in detail with reference to each side of the present invention, each example of the present invention obtains describing in the accompanying drawings, wherein runs through in full, and identical Reference numeral refers to components identical.Hereinafter described various aspects are in order by the reference accompanying drawing the present invention to be explained.
Hereinafter, the present invention carries out more detailed description with reference to the accompanying drawings, and each side of the present invention has been shown in the described accompanying drawing.
Fig. 1 is a view of describing the plasm display panel (PDP) that is driven by according to an aspect of the present invention drive unit.Fig. 2 is a view of describing the electrode spread among the PDP of Fig. 1.
See figures.1.and.2, between first substrate 100 of PDP1 and second substrate 106, be formed with addressing electrode A1-Am, first and second dielectric layers 102 and 110, scan electrode Y1-Yn, keep electrode X1-Xn, fluorescence coating 112, stop rib 114 and a magnesium oxide (MgO) protective seam 104.
Addressing electrode A1-Am with uniformly (or periodic) pattern be formed at second substrate 106 on a side of first substrate 100.Second dielectric layer 110 is coated on the addressing electrode A1-Am.Stop that rib 114 is formed on second dielectric layer 110 and parallel with addressing electrode A1-Am.Stop that rib 114 defines the region of discharge of each discharge cell, and prevent the optical interference between the discharge cell.Fluorescence coating 112 is coated on second dielectric layer 110, and with stop that the addressing electrode A1-Am between the rib 114 is corresponding.Correspondingly, be disposed in order the fluorescence coating that sends ruddiness (R), green glow (G) and blue light (B).In aspect different, described fluorescence coating also is coated on the part that stops rib 114.
Keep electrode X1-Xn and scan electrode Y1-Yn and be formed at the side of first substrate 100, and relative addressing electrode A 1-Am vertically extends towards second substrate 106 with uniform (perhaps periodic) pattern.(perhaps limiting) corresponding discharge cell is set in each point of crossing wherein.By the transparency electrode Xna and the Yna that will form by the transparent conductive material such as tin indium oxide (ITO), make up with metal electrode Xnb and Ynb respectively, can correspondingly form each among each and the scan electrode Y1-Yn that keeps among the electrode X1-Xn with high conductivity.First dielectric layer 102 is coated on the whole surface of first substrate 100, keeps electrode X1-Xn and scan electrode Y1-Yn with covering.Thereby the protective seam 104 that protection PDP1 isolates itself and highfield be such as the MgO layer layer, and be coated on the whole surface of first dielectric layer 102.The gas that forms plasma is sealed in the discharge space 108.In aspect different, described gas is one or more inert gases or the inactive gas such as neon and/or argon gas.
Simultaneously, the PDP that uses the method according to each side of the present invention to drive is not limited to the PDP1 described in Fig. 1.That is to say that PDP not only can have three-electrode structure as shown in Figure 1, can also have the bipolar electrode structure.On the other hand, also contain within the scope of the present invention more than three electrode.Also can adopt other PDP, as long as they can obtain by the method according to each side of the present invention driving with different structure.
Scan electrode Y1-Yn is parallel to respectively and keeps electrode X1-Xn and arrange that addressing electrode A1-Am is arranged to scan electrode Y1-Yn and keeps electrode X1-Xn intersect, and the intersection region limits discharge cell Ce.
Fig. 3 is a structural drawing of describing the drive unit of the PDP1 be used to drive Fig. 1.
With reference to Fig. 3, the drive unit of PDP1 comprises image processor 300, logic controller 302, Y driver element 304, addressing driver element 306, X driver element 308 and PDP1.Image processor 300 conversion external image signals, thus the internal image signal produced.Logic controller 302 receives the internal image signal, thus output addressing drive control signal S A, Y drive control signal S YWith X drive control signal S XIn each.In Y driver element 304, addressing driver element 306 and the X driver element 308 each all receives the corresponding driving control signal, thereby drive signal is correspondingly outputed to scan electrode Y1-Yn, addressing electrode A1-Am and keep among the electrode X1-Xn each.
Fig. 4 is the schematic sequential chart of describing from the drive signal of described each the driver element output of Fig. 3.
With reference to Fig. 4, can be divided into a plurality of subdomain SF as the unit framework (unit frame) of a PDP1 display cycle, that be used for driving Fig. 3, Fig. 4 has shown one of them subdomain.In addition, each subdomain SF is divided into the PR in period that resets, addressing PA in period and keeps PS in period.
At first, during the PR in period that resets, the reset pulse that comprises rising edge pulse (or part) and negative edge pulse (or part) is applied to scan electrode Y1-Yn, and the second voltage Vb is applied to and keeps electrode X1-Xn, reduce pulse (or negative edge pulse) simultaneously and be applied to scan electrode Y1-Yn, so that carry out reset discharge.Whole discharge cell be reset the discharge initialization (perhaps resetting).At scan electrode Y1-Yn, the rising edge pulse increases to the level of tertiary voltage Vset from the level of the first voltage Vs, thereby reaches highest voltage level Vset+Vs, and the negative edge pulse drops to the level of the 4th voltage Vnf from the level of the first voltage Vs.
During addressing PA in period, scanning impulse sequentially is applied to scan electrode Y1-Yn, and addressing pulse is applied to addressing electrode A1-Am according to scanning impulse, so that carry out address discharge.Will produce the discharge cell of keeping discharge during keeping PS in period is selected by address discharge.Be in the 5th voltage Vsch when scanning impulse is initial, and reach the 6th voltage Vscl that is lower than the 5th voltage Vsch level gradually.When applying the 6th voltage Vscl of scanning impulse, addressing pulse is in the 7th voltage Va with synchronous forward polarity.
During keeping PS in period, keep pulse and alternately be applied to and keep electrode X1-Xn and scan electrode Y1-Yn, keep discharge thereby carry out.The brightness in the territory, unit that forms by a plurality of subdomains depend on based on the weighted value of the gray scale that is assigned to each subdomain and carry out keep discharge.Keeping pulse replaces between the first voltage Vs and ground voltage Vg.Though some pulses are illustrated as square wave, yet other dissimilar waveform of pulse also within the scope of the invention.
Correspondingly, each driver element output that the drive signal of describing among Fig. 4 is described from Fig. 3, but the drive signal that drive signal is not restricted to show among Fig. 4.
Fig. 5 describes from the oscillogram of keeping pulse in the drive signal of describing among Fig. 4.
With reference to Fig. 5, keep X driver element or the output of Y driver element that pulse is described from Fig. 3.In addition, the work by the energy recovery unit 82 described among the pulse applying unit 80 described among Fig. 8 and Fig. 8 has also produced the waveform of describing among Fig. 5, and this will be described below.Keeping pulse comprises: first period Ta, its level from ground voltage Vg is elevated to the level of keeping voltage Vs; Second period Tb, voltage Vs is kept in its maintenance; The 3rd period Tc, it is reduced to the level of ground voltage Vg from the level of keeping voltage Vs; With (or voltage) Td in the 4th period, it keeps ground voltage Vg.First period Ta and during the 3rd Tc this two periods in period, energy recovery unit 82 work described in Fig. 8, and second period Tb and during the 4th Td this two periods in period, pulse applying unit 80 work described in Fig. 8.In aspect different, as shown in the figure, first period Ta and the 3rd period Tc slope can be more and more steeper, perhaps more and more slow.
Fig. 6 is a circuit diagram of describing the PDP drive unit of comparing with an aspect of of the present present invention 500.Fig. 7 is a view of describing the drive integrated circult (IC) 701 that drives described the 4th switching device of Fig. 6.
With reference to Fig. 6, drive unit 500 comprises pulse applying unit 50 and energy recovery unit 52.Pulse applying unit 50 applies pulse to PDP, that is to say that any electrode of describing in Fig. 1 and Fig. 2 applies pulse.In the circuit diagram of Fig. 6, PDP is represented as panel capacitor Cp.Correspondingly, described pulse is applied to the end (the first terminal of panel capacitor Cp is from first electrode in described a plurality of electrodes) of panel capacitor Cp.In addition, another pulse signal is applied to the other end (second terminal of panel capacitor Cp is perhaps from second electrode in described a plurality of electrodes) of panel capacitor Cp.
Pulse applying unit 50 comprises first voltage applying unit 501 and second voltage applying unit 503.First voltage applying unit 501 comprises first voltage source and the first switching device S1, and the first switching device S1 switches the first voltage Vs that supplies with from first voltage source, thereby first voltage is sent to panel capacitor Cp (the first terminal).Second voltage applying unit 503 comprises second voltage source and second switch device S2, and second switch device S2 switches the second voltage Vg from second voltage source, and the second voltage Vg is sent to panel capacitor Cp (the first terminal).
Energy recovery unit 52 comprises inductor L1, energy recovery determinant 522 and energy storage units 520.The capacitive component of inductor L1 and panel capacitor Cp produces LC resonance.Energy recovery determinant 522 is determined the gathering of electric charge among the panel capacitor Cp (energy) by electric charge being recovered to energy storage units 520, and the electric charge of perhaps determining to be stored in the energy storage units 520 (energy) sends (or discharge) to panel capacitor Cp.Correspondingly, energy recovery determinant 522 comprises the 3rd switching device S3, the 4th switching device S4, increases progressively diode (increasing diode) D1 and the diode that successively decreases (decreasing diode) D2 as unidirectional conduction device.The electric charge that is recovered to (energy) is stored in the energy storage units 520.Energy storage units 520 is presented as (or comprising) capacitor C2.
Observe by reference Fig. 5 and to keep the pulse production process, the 3rd switching device S3 conducting during the first period Ta, first switching device S1 conducting during the second period Tb, the 4th switching device S4 conducting during the 3rd period Tc, and S2 conducting during the 4th period Td during the second switch.
Further, each switching device is worked by receiving from the switch controlling signal of as shown in Figure 7 drive IC 701.Particularly, after the driving voltage from the driving voltage source of service voltage Vcc is applied among the driving voltage capacitor Cc, apply prearranged signals and from the lead-out terminal output switch control signal of drive IC 701 by input terminal LIN to drive IC 701.Be output from the switch controlling signal of the drive IC 701 output form with pulse, described pulse has about 5V to the pulse voltage between the 15V.Usually, before switch controlling signal is input to switching device, will use DC coupling condenser Cd to remove the DC composition.But, DC coupling condenser Cd makes the waveform distortion of switch controlling signal.This problem betides among the 4th switching device S4 of energy recovery unit 52 inside especially.That is to say that because the distortion of switch controlling signal waveform, the 4th switching device S4 generates heat and may burn.
Fig. 8 is a circuit diagram of describing PDP drive unit 800 according to an aspect of the present invention.Fig. 9 is the view that describe to drive the drive IC 831 of the first and second decline switching device S14 described in Fig. 8 and S15.
With reference to Fig. 8, drive unit 800 comprises pulse applying unit 80 and energy recovery unit 82.Hereinafter, PDP will be considered to panel capacitor Cp be of equal value on electricity.
Pulse applying unit 80 puts on pulse among (perhaps, being applied to) panel capacitor Cp, and comprises first voltage applying unit 801 and second voltage applying unit 803.First voltage applying unit 801 comprises first voltage source and the first voltage switch device S11, and the first voltage switch device S11 switches the first voltage Vs from first voltage source, and the first voltage Vs is sent to the end (the first terminal) of panel capacitor Cp.Second voltage applying unit 803 comprises second voltage source and the second voltage switch device S12, and the second voltage switch device S12 switches the second voltage Vg from second voltage source, and the second voltage Vg is sent to an end (the first terminal) of panel capacitor.At this, the second voltage Vg can be a ground voltage.
Simultaneously, during keeping PS in period, described pulse can be the pulse of keeping that alternately is applied to scan electrode Y1-Yn as shown in Figure 2 and keeps electrode X1-Xn.In this case, the first voltage Vs keeps voltage Vs.At the first voltage Vs is to keep under the situation of voltage Vs, and the end (the first terminal) of panel capacitor Cp can be scan electrode, and the other end of panel capacitor Cp (second terminal) can be for keeping electrode.That is to say that the drive unit 800 of current aspect can be Y driver element 304 shown in Figure 3 according to the present invention.
Certainly, when the end (the first terminal) of panel capacitor Cp when keeping electrode, drive unit 800 can be X driver element 308 shown in Figure 3.In addition, during addressing PA in period, pulse can be for being applied to the addressing pulse of addressing electrode A1-Am as shown in Figure 2.Correspondingly, one or more electrode can be connected to drive unit 800.
Energy recovery unit 82 comprises inductor L11, energy recovery determinant 822 and energy storage units 820.Energy recovery unit 82 reclaims and assembles electric charge (energy) among the panel capacitor Cp, perhaps (or storage) electric charge (energy) of being assembled sent to panel capacitor Cp.The capacitive component of inductor L11 and panel capacitor Cp produces LC resonance, thereby transmits energy in the pulse rising or in reducing.
Energy recovery determinant 822 comprises the first decline switching device S14, the second decline switching device S15, rising switching device S13 and diode D11, and diode D11 is unidirectional conduction device.In the path that the first decline switching device S14 and the second decline switching device S15 are arranged, electric charge (energy) is sent to energy storage units 820 from panel capacitor Cp.In the path that rising switching device S13 and diode D11 are arranged, electric charge (energy) is sent to panel capacitor Cp from energy storage units 820.
Energy storage units 820 can be presented as (or comprising) s energy storage capacitor C12, and it is arranged between energy recovery determinant 822 and the ground terminal.
Hereinafter, with reference to the waveform of keeping pulse shown in Figure 5 operation according to the drive unit 800 of current aspect of the present invention is described.During the first period Ta, rising switching device S13 conducting, therefore, the electric charge (energy) that is stored in the energy storage units 820 is sent to panel capacitor Cp along the path that is formed by rising switching device S13, diode D11 and inductor L11.At this moment, the capacitive component of inductor L11 and panel capacitor Cp has produced LC resonance.
During the second period Tb, the first voltage switch device S11 conducting, therefore, the first voltage Vs is sent to panel capacitor Cp from first voltage source.During the 3rd period Tc, the first decline switching device S14 and the second decline switching device S15 conducting, therefore, the electric charge of panel capacitor Cp (energy) is sent to energy storage units 820 through inductor L11, the first decline switching device S14 and the second decline switching device S15.During the 4th period Td, the second voltage switch device S12 conducting, therefore, the second voltage Vg is transmitted (or being applied in) to panel capacitor Cp.
The first and second decline switching device S14 and S15 can be presented as (or comprising) field effect transistor (FET), and in this case, its each source terminal is connected publicly.That is to say that each source terminal is the public source that links together.
In addition, public switch-over control signal is imported into each gate terminal of the first and second decline switching device S14 and S15.The second decline switching device S15 is as unidirectional conduction device, the decline diode D2 that for example describes among Fig. 6.
That is to say that during the first period Ta, the first and second decline switching device S14 and S15 end, therefore, can not be from the electric charge (energy) of energy storage units 820 through wherein being transmitted.This is also because the corresponding internal body diodes of the first and second decline switching device S14 and S15 is faced one another in opposite directions.
Hereinafter, describe the work of the first and second decline switching device S14 and S15 in detail with reference to Fig. 9.The first and second decline switching device S14 and S15 are electrically connected to drive IC 831.In order to make the first and second decline switching device S14 and S15 work, the boottrap capacitor Cb1 that is connected to the public source terminal at first is recharged.When the second voltage switch device S12 conducting, formed internal body diodes from boottrap capacitor Cb1, the first decline switching device S14, inductor L11, the second voltage switch device S12 path to ground terminal, therefore, the driving voltage from the driving voltage source of service voltage Vcc is applied among the boottrap capacitor Cb1 along described path.
Drive IC 831, boottrap capacitor Cb1, bootstrap diode D10 and resistor R 11, R12 and R13 form switching device driver element 830.Bootstrap diode D10 is connected, thus block can between the driving voltage source of service voltage Vcc and boottrap capacitor Cb1, form, along the current path of the direction in driving voltage source from boottrap capacitor Cb1 to service voltage Vcc.
Resistor R 11 can be connected between the driving voltage source and bootstrap diode D10 of service voltage Vcc, thereby prevents that instantaneous voltage from changing.In addition, resistor R 12 and R13 can be connected between the gate terminal of the lead-out terminal HO of drive IC 831 and the first decline switching device S14, and between the gate terminal of the lead-out terminal HO of drive IC 831 and the second decline switching device S15, thereby prevent that instantaneous voltage from changing.
Amplifier 931 described in Figure 11 such as push-pull amplifier, can be contained in the drive IC 831, receiving drive control signal, thereby and drive control signal is amplified to the level that to operate the first and second decline switching device S14 and S15 voltage that output is amplified.
Then, when driving voltage is applied in and prearranged signals when being imported into input terminal HIN, switch controlling signal is from the lead-out terminal HO output of drive IC 831.Switch controlling signal is the common switch control signal, and it drives first and second decline switching device S14 and the S15.
Current aspect more of the present invention and aspect shown in Figure 6, the waveform of switch controlling signal is not out of shape, because DC coupling condenser Cd is not arranged between the gate terminal of drive IC 831 and the first and second decline switching device S14 and S15.In addition, driving voltage can be applied reposefully, and the first and second decline switching device S14 and S15 work reposefully.Correspondingly, can increase or realize reliability.
Figure 10 is a circuit diagram of describing PDP drive unit 900 according to a further aspect in the invention.Figure 11 is a view of describing the switching device driver element 930 that drives decline switching device S24 shown in Figure 10.
With reference to Figure 10, comprise pulse applying unit 90 and energy recovery unit 92 according to the PDP drive unit 900 of current aspect of the present invention.Hereinafter, PDP will be considered to of equal value on electricity with panel capacitor Cp.
Pulse applying unit 90 is applied to PDP with pulse, and comprises first voltage applying unit 901 and second voltage applying unit 903.First voltage applying unit 901 comprises first voltage source and the first voltage switch device S21, and the first voltage switch device S21 switches the first voltage Vs that supplies with from first voltage source, and the first voltage Vs is sent to the end (the first terminal) of panel capacitor Cp.Second voltage applying unit 903 comprises second voltage source and the second voltage switch device S22, the second voltage switch device S22 switches the second voltage Vg from second voltage source, and with second voltage Vg transmission (connect, or apply) end (the first terminal) to panel capacitor Cp.At this, the second voltage Vg can be ground voltage.
Pulse (or the pulse that is applied) can be the pulse of keeping that alternately is applied to scan electrode Y1-Yn as shown in Figure 2 and keeps electrode X1-Xn during keeping PS in period.In this case, the first voltage Vs is for keeping voltage Vs.When the first voltage Vs when keeping voltage Vs, the end (the first terminal) of panel capacitor Cp can be scan electrode, and the other end of panel capacitor Cp (second terminal) can be and keeps electrode.That is to say, can be as shown in Figure 3 Y driver element 304 according to the drive unit 900 of current aspect of the present invention.
Certainly, when the end (the first terminal) of panel capacitor Cp when keeping electrode, drive unit 900 can be X driver element 308 as shown in Figure 3.In addition, pulse can be the addressing pulse that is applied to addressing electrode A1-Am as shown in Figure 2 during addressing PA in period.Correspondingly, the one or more drive units 900 that are connected in the described electrode.
Energy recovery unit 92 comprises inductor L2, energy recovery determinant 922 and energy storage units 920.Energy recovery unit 92 reclaims and accumulates in the electric charge (energy) among the panel capacitor Cp, perhaps (or storage) electric charge (energy) of being assembled sent to panel capacitor Cp.The capacitive component of inductor L2 and panel capacitor Cp produces LC resonance, thereby transmits energy in the pulse rising with in descending.
At this, inductor L2 can be connected between energy recovery determinant 922 and the panel capacitor Cp, perhaps is connected between energy recovery determinant 922 and the pulse applying unit 90.
Energy recovery determinant 922 comprises decline switching device S24, decline diode D22, rising switching device S23 and is the diode D21 of unidirectional conduction device.Along the path that decline switching device S24 and decline diode D22 are arranged, be sent to energy storage units 920 from the electric charge (energy) of panel capacitor Cp.Along the path that rising switching device S23 and diode D21 are arranged, be sent to panel capacitor Cp from the electric charge (energy) of energy storage units 220.
Energy storage units 920 can be presented as (or comprising) s energy storage capacitor C22, and s energy storage capacitor C22 is arranged between energy recovery determinant 920 and the ground terminal.
Hereinafter, with reference to the waveform of keeping pulse shown in Figure 5 operation according to the drive unit 900 of current aspect of the present invention is described.During the first period Ta, therefore rising switching device S23 conducting, is stored in electric charge (energy) in the energy storage units 920 through by rising switching device S23, diode D21 and the formed path of inductor L2, and is sent to panel capacitor Cp.At this moment, the capacitive character composition of inductor L2 and panel capacitor Cp has produced LC resonance.
During the second period Tb, the first voltage switch device S21 conducting, therefore, the first voltage Vs is sent to panel capacitor Cp from first voltage source.During the 3rd period Tc, decline switching device S24 and decline diode D22 conducting, therefore, the electric charge of panel capacitor Cp (energy) is sent to energy storage units 920 through inductor L2, decline switching device S24 and decline diode D22.During the 4th period Td, the second voltage switch device S22 conducting, therefore, the second voltage Vg is sent to panel capacitor Cp.
Decline switching device S24 can be presented as (or comprising) FET.In addition, switch controlling signal is imported into the gate terminal of decline switching device S24.Decline diode D22 is as the unidirectional conduction device that is similar to the described decline diode of Fig. 6 D2.That is to say, during the first period Ta, can not be from the electric charge (energy) of energy storage units 920 by wherein being transmitted, because decline switching device S24 ends.
Hereinafter, describe the operation of decline switching device S24 and decline diode D22 in detail with reference to Figure 10 and Figure 11.Decline switching device S24 is driven by switching device driver element 930, and is electrically connected to drive IC 931.In order to make decline switching device S24 work, the boottrap capacitor Cb2 that is connected to source terminal at first is recharged.When the second voltage switch device S22 conducting, driving voltage from the driving voltage source of service voltage Vcc, along from internal body diodes, inductor L2 and the second voltage switch device S22 of boottrap capacitor Cb2, decline switching device S24 to the formed path of ground terminal, be applied among the boottrap capacitor Cb2.
At this, drive IC 931, boottrap capacitor Cb2, bootstrap diode D20 and resistor R 21 and R22 form switching device driver element 930.
Drive IC 931 can be amplifier 931, its reception and amplification drive control signal, thus can operate the voltage that decline switching device S24 output is exaggerated until voltage levvl.
Amplifier 931 output high level voltages or low level voltage, this voltage can responsive control signals (in) and drive the gate terminal of decline switching device S24.Control signal (in) is the signal from logic controller shown in Figure 3 302 outputs, the conduction and cut-off of its control decline switching device S24.Control signal (in) has the low voltage range that is used for logic controller 302.But, can not control the conduction and cut-off of decline switching device S24 by the level that only uses control signal (in).Correspondingly, use amplifier 931 so that amplify the level of control signal (in).Amplifier 931 can be push-pull amplifier.
High level power input end of amplifier 931 is connected to the end of boottrap capacitor Cb2, and low level power input end of the other end of boottrap capacitor Cb2 and amplifier 931 all is connected to the source terminal of decline switching device S24.In addition, the described end of boottrap capacitor Cb2 is connected to the power supply of for example supplying with the 15V voltage vcc.The lead-out terminal of amplifier 931 is connected to the gate terminal of decline switching device S24 by resistor R 21.
When the second voltage switch device S22 is switched on and 0V when being applied to the end of panel capacitor Cp, the drain voltage of decline switching device S24, be the voltage that is obtained in the end of inductor L2, also be 0V, because as shown in Figure 10 and Figure 11, diode D20 is not set between inductor L2 and the decline switching device S24, and is different from Fig. 6 and the diode 2 that successively decreases shown in Figure 7.Correspondingly, because the body diode of decline switching device S24, the source voltage of decline switching device S24 becomes the drain voltage 0V of decline switching device S24.Therefore, boottrap capacitor Cb2 is charged to the voltage of 15V.
At this, diode D20 can be arranged between the driving voltage source and boottrap capacitor Cb2 of service voltage Vcc extraly, thereby cuts off the path that can form along the direction in the driving voltage source from boottrap capacitor Cb2 to service voltage Vcc.
Hereinafter, will the work of switching device driver element 930 shown in Figure 11 be described.
At first, when control signal (in) during the 3rd period Tc of Fig. 5 becomes 5V so that when reducing the voltage of panel capacitor Cp, the voltage of the terminal of amplifier 931 output boottrap capacitor Cb2, described terminal is high level power input end.Because boottrap capacitor Cb2 is booted, so the high 15V of source voltage of the voltage ratio decline switching device S24 of the high level input terminal of boottrap capacitor Cb2, this source voltage is the voltage of the another terminal of boottrap capacitor Cb2.
That is to say that the output voltage of amplifier 931 outsides is than the high 15V of source voltage of decline switching device S24.Correspondingly, the grid-source voltage of decline switching device S24 becomes 15V, and switching device S24 conducting therefore descends.
When the 4th, first and second period Td, Ta and Tb during control signal (in) when becoming 0V, after the voltage of panel capacitor Cp descends, amplifier 931 output decline switching device S24 are at the source voltage at low level power input end place, and it is low level power input end.Then, the grid-source voltage of decline switching device S24 becomes 0V, and the switching device S24 that therefore descends ends.
Correspondingly, the two ends of boottrap capacitor C2 all always have the voltage of 15V, therefore, can use the boottrap capacitor Cb2 with low internal pressure (or voltage).Because the output voltage of amplifier 931 directly is sent to the gate terminal of decline switching device S24 and without boottrap capacitor Cb2, so waveform is not out of shape.In addition, because the drain terminal of decline switching device S24 is directly connected to the electrode of inductor L2 or PDP, and without diode D22, so boottrap capacitor Cb2 can be charged to the voltage of 15V.
In one aspect of the invention, the voltage of amplifier 931 output 15V, but can use another kind to have the voltage of varying level, it is conducting decline switching device S24 reposefully.
In addition, in each side of the present invention, the pulse of keeping with first voltage Vs alternately is applied to scan electrode Y1-Yn and keeps electrode X1-Xn, as shown in Figure 4.But, be different from Fig. 4, keep pulse and can be applied to scan electrode Y1-Yn and/or keep electrode X1-Xn, scan electrode Y1-Yn and to keep voltage difference between the electrode X1-Xn alternately be the first voltage Vs and negative first voltage-Vs in keeping pulse.For example, when scan electrode Y1-Yn is biased to ground voltage, alternately have keeping pulse and can being applied to and keeping electrode X1-Xn of the first voltage Vs and negative first voltage-Vs.In this case, can change the power source voltage level that is connected to s energy storage capacitor C22 and the first and second voltage switch device S21 and S22.
Of the present invention current aspect, during keeping PS in period, used energy recovering circuit, but energy recovering circuit can also use during addressing PA in period.That is to say, can use energy recovering circuit to be created in the addressing pulse that is applied to addressing electrode A1-Am during the addressing PA in period.
In addition, this respect of the present invention is compared with the described aspect of Fig. 6, because DC coupling condenser Cd is not arranged between the gate terminal of amplifier 931 and decline switching device S24, so waveform is not out of shape.In addition, driving voltage can apply reposefully, and decline switching device S24 works reposefully.Correspondingly, can increase or realize reliability.
Figure 12 be describe according to a further aspect in the invention PDP energy recovering circuit 420 and the circuit diagram of drive unit 400.
With reference to Figure 12, drive unit 400 drives the described PDP1 of Fig. 1, and this PDP1 has from the panel capacitor Cp between two electrode circuits in a plurality of electrode circuits at least.Drive unit 400 comprises pulse applying unit 410 and energy recovering circuit 420.Fig. 8 and energy recovery unit 82 shown in Figure 10 and the energy recovering circuit 420 of 92 corresponding each side of the present invention.
Pulse applying unit 410 supplies to the electrode circuit with sparking voltage.Panel capacitor Cp produces discharge by using sparking voltage.Energy recovering circuit 420 from panel capacitor Cp recover energy or with energy discharge in (or, to) panel capacitor Cp.
The electrode circuit that forms panel capacitor Cp can be for keeping the electrode circuit.That is to say that panel capacitor Cp can be formed at that Fig. 1 is described to be kept between electrode X1-Xn circuit and/or the scan electrode Y1-Yn circuit.In addition, what pulse applying unit 410 can be the described X driver element of Fig. 3 308 inside keeps the pulse applying unit, perhaps keeps the pulse applying unit for the described Y driver element of Fig. 3 304 inside.
One end of pulse applying unit 410 is connected to first voltage supply terminal of supplying with the first voltage Vs, and the other end is connected to second voltage supply terminal of supplying with the second voltage Vg.Fig. 4 is described keep PS in period during, Fig. 5 is described to be kept pulse and is applied to by pulse applying unit 410 and keeps electrode X1-Xn circuit and scan electrode Y1-Yn circuit.
As an alternative, during keeping PS in period as described in Figure 4, amplitude voltage identical and opposite polarity, that have the first level Vs and the second level Vg can alternately be applied to keeps electrode X1-Xn circuit and scan electrode Y1-Yn circuit.
Pulse applying unit 410 comprises first voltage applying unit 411 and ground (perhaps second) voltage applying unit 412.First voltage applying unit 411 outputs to an end (the first terminal of panel capacitor Cp) of electrode circuit with the first voltage Vs, thereby drive signal is outputed to a described end (the first terminal of panel capacitor Cp) of electrode circuit.Ground (perhaps second) voltage applying unit 412 outputs to ground (or second) voltage Vg at a described end (the first terminal of panel capacitor Cp) of electrode circuit.
As an alternative, panel capacitor Cp can be formed at Fig. 1 and describes between ground addressing electrode A1-Am circuit and the scan electrode Y1-Yn circuit.Aspect different, pulse applying unit 410 can be data (or addressing) pulse applying unit, and it is applied to addressing driver element 306 as described in Figure 3 with data (or addressing) pulse.
Energy recovering circuit 420 recovers energy from panel capacitor Cp, perhaps with energy discharge in (perhaps arriving) panel capacitor Cp.When sparking voltage is applied to every strip electrode circuit by pulse applying unit 410 (keeping PS in period as described in Figure 4), energy recovering circuit 420 is at first supplied with the energy of being stored.Correspondingly, the voltage that the energy that passes through to be stored is applied to the electrode circuit can increase to the level (the first voltage Vs as described in Figure 4) of sparking voltage from the level of ground voltage Vg as described in Figure 4, perhaps is at least and the immediate level of the level of sparking voltage.
That is to say that the voltage that is applied to the electrode circuit is increased to the level of sparking voltage or the predetermined level approaching with the level of sparking voltage, then, sparking voltage is applied to the electrode circuit.Correspondingly, the load of switch is lowered, and the consumption of reaction power is lowered, thereby uses energy effectively.
When ground voltage is applied to every strip electrode circuit by pulse applying unit 410 (keeping PS in period as described in Figure 4), the energy that applies in panel capacitor Cp is stored in the energy storage units 421, that is, be stored among the energy recovery capacitor Cerc.In addition, the energy that applies in panel capacitor Cp is recycled to energy recovery capacitor Cerc, thereby the voltage that will be applied to the electrode circuit is reduced to ground voltage Vg as described in Figure 4 from ground voltage (the first voltage Vs as described in Figure 4), perhaps is reduced at least near (or close) ground voltage Vg as described in Figure 4.
That is to say that the voltage that is applied to the electrode circuit is increased to sparking voltage or the predetermined level approaching with sparking voltage, then, ground voltage Vg is applied to the electrode circuit.Correspondingly, the load of switch reduces, and the loss of reaction power reduction, thereby uses energy effectively.
Energy recovering circuit 420 comprises energy storage units 421, energy recovery determinant 430 and inductor L0, though inductor L0 and nonessential.
Energy storage units 421 is by the charging that recovers energy from panel capacitor Cp.The charging voltage of energy storage units 421 can be 1/2 the voltage that is equivalent to voltage of power (the first voltage Vs described in Fig. 4), and described voltage of power is supplied with by the pulse applying unit 410 that is used for discharging at panel capacitor Cp.
The end of inductor L0 is connected to an end of energy recovery determinant 430, and the other end of inductor L0 is connected to panel capacitor Cp.When panel capacitor Cp be recharged/when discharging, inductor L0 and panel capacitor Cp produce resonance.
The other end of energy recovery determinant 430 is connected to energy storage units 421, and its energy that energy recovery determinant 430 can be controlled from energy storage units 421 to panel capacitor Cp applies and energy recovery.Energy recovery determinant 430 comprises rising switching device M1, decline switching device M2, rising diode Dr and decline diode Df.
Rising switching device M1 and decline switching device M2 are connected between energy storage units 421 and the inductor L0 in parallel.Rising diode Dr is connected between rising switching device M1 and the inductor L0, thereby makes electric current flow to inductor L0 from rising switching device M1.Decline diode Df is connected between decline switching device M2 and the energy storage units 421, thereby makes electric current flow to energy storage units 421 from decline switching device M2.
In energy recovery determinant 430, the electric current that produces owing to the energy that is stored in the energy storage units 421 is controlled as by rising switching device M1 and rising diode Dr, flows to panel capacitor Cp from energy storage units 421.In addition, in energy recovery determinant 430, the electric current that produces owing to the sparking voltage that is applied among the panel capacitor Cp is controlled as by decline switching device M2 and decline diode Df, flows to energy storage units 421 from panel capacitor Cp.
Aspect unrestriced, rising switching device M1 can be FET, and wherein the first terminal is a drain terminal, and second terminal is a source terminal, and the 3rd terminal is a gate terminal.The first terminal is connected to energy storage units 421.Second terminal is connected to rising diode Dr.The electric current that flows to second terminal from the first terminal is by the signal controlling that is applied to the 3rd terminal.
Energy recovery determinant 430 comprises the rising switching device driver element 431 that drives rising switching device M1.A terminal of rising switching device driver element 431 is connected to first voltage source of service voltage Vcc; Another terminal of rising switching device driver element 431 is connected between rising switching device M1 and the rising diode Dr.
Rising switching device driver element 431 comprises driving element U1, and it is by using from the input signal Sr of outside input, and the signal of controlling from first voltage source of service voltage Vcc to the 3rd terminal of rising switching device M1 applies.
Driving element U1 comprises: the sub-IN of the driving signal input of receiving inputted signal Sr; The electric power that is connected to the first voltage of power source VCC applies terminal Vss; Lead-out terminal OUT with the 3rd terminal that is connected to rising switching device M1.At this, electric power applies terminal Vss and is connected to the first voltage source V CC through diode D5, applies terminal Vss so that electric current flows to electric power from the first voltage source V CC.
The terminal VEE of driving element U1 is connected in rising switching device M1 and rising diode Dr and electric power and applies between terminal VCC and the capacitor Cr.Correspondingly, rising switching device M1 is switched on, and obtains between gate terminal (the 3rd terminal) and source terminal (second terminal) because the voltage (for example 15V) that is applied by the first voltage source V CC is transfused to signal Sr.
Decline switching device M2 can be FET, and wherein the first terminal is a drain terminal, and second terminal is a source terminal, and the 3rd terminal is a gate terminal.The first terminal is connected to panel capacitor Cp by inductor L0.Second terminal is connected to decline diode Df.The electric current that flows to second terminal from the first terminal is subjected to putting on the signal controlling of the 3rd terminal.
Energy recovery determinant 430 comprises the decline switching device driver element 432 that drives decline switching device M2.A terminal of decline switching device driver element 432 is connected to the second voltage source V CC, and another terminal of decline switching device driver element 432 is connected between decline switching device M2 and the decline diode Df.
Decline switching device driver element 432 comprises driving element U2, and it is by using from the input signal Sf of outside input, and the signal of controlling the 3rd terminal from the second voltage source V CC to decline switching device M2 applies.
Driving element U2 comprises: the sub-IN of the driving signal input of receiving inputted signal Sf; The electric power that is connected to the second voltage source V CC applies terminal Vss; Lead-out terminal OUT with the 3rd terminal that is connected to decline switching device M2.At this, electric power applies terminal VCC and is connected to the second voltage source V CC through diode D6, and this connection makes electric current flow to electric power from second source VCC and applies terminal VCC.
The terminal VEE of driving element U2 is connected in decline switching device M2 and decline diode Df and electric power and applies between terminal VCC and the capacitor Cf.Correspondingly, decline switching device M2 is switched on, and obtains between the gate terminal (the 3rd terminal) of the second gauge tap M2 and source terminal (second terminal) because the voltage (for example 15V) that is applied by the second voltage source V CC is transfused to signal Sf.
At this respect, decline diode Df is connected between decline switching device M2 and the energy storage units 421 especially, so that make electric current flow to energy storage units 421 from decline switching device M2.
In other words, during the switching device conducting of local voltage applying unit 412, the electric current that produces with respect to the 15V voltage on ground that is applied by the second voltage source V CC is along bootstrapping charge path P1 and through boottrap capacitor Cf and apply.That is to say, during initial guide, the 15V that is applied by the second voltage source V CC and the electric current that produces are along the bootstrapping charge path from second source VCC, diode D6, capacitor Cf, the second gauge tap M2, inductor L0 to the switching device of ground voltage applying unit 412 and be applied to the capacitor Cf.
Correspondingly, be similar to rising switching device driver element 431 and decline switching device driver element 432, the second gauge tap M2 is switched on, (for example, 15V) being transfused to signal Sf obtains between the gate terminal (the 3rd terminal) of the second gauge tap M2 and source terminal (second terminal) because the voltage that is applied by the second voltage source V CC.
Boottrap capacitor Cf is by the charging of the floating voltage of 15V, for example charging method in rising switching device driver element 431.Correspondingly, do not need extra DC block-condenser to drive the second gauge tap M2.Therefore, the second gauge tap M2 can even running, and the reliability of energy recovering circuit 420 can be improved.In addition, owing to do not use the DC block-condenser, can reduce production costs.
As indicated above, the present invention has following advantage and other advantage.
According to each aspect of the present invention, the decline switching device that energy reclaims the unit is connected by common source, and does not use the DC coupling capacitor. Correspondingly, driving voltage can be applied reposefully, and the decline switching device can be worked reposefully, and the possibility that can reduce heating and exhaust. Therefore, can realize the reliability of drive unit.
According to each aspect of the present invention, can reclaim circuit for the energy of the display of plasma scope, comprising: the inductor that is connected to display; The energy memory cell that recovers energy from display; And the energy that is connected between inductor and the energy memory cell reclaims the unit, wherein, energy reclaims the unit and has first unidirectional path that energy is supplied to display from the energy memory cell, with second unidirectional path that recovers energy from display, and first and second unidirectional paths have the reciprocity element that equity is arranged, as shown in drawings and above discuss.
Although shown and some aspect of the present invention be discussed, yet what it will be appreciated by those skilled in the art that is, can transform in many-side under the prerequisite that does not depart from principle of the present invention and spirit, scope of the present invention is defined in claims and the method for equal value thereof.

Claims (41)

1. drive unit that drives plasm display panel PDP, described drive unit comprises:
The pulse applying unit, it is applied to described PDP with pulse; With
Energy recovery unit, it comprises: inductor, the capacitive component of the panel capacitor of itself and described PDP produces LC resonance; The energy recovery determinant, its determine the energy accumulating during described LC resonance or the energy assembled to the transmission of described PDP; And energy storage units, it stores the energy of described gathering,
Wherein said energy recovery determinant comprises: the first decline switching device, and it determines the gathering of described energy; With
The second decline switching device, it is connected between described first decline switching device and the described energy storage units, thereby makes the current path of described second decline switching device formation towards described energy storage units,
Wherein said first decline switching device and the described second decline switching device are field effect transistor FET, and their source terminal connected publicly, and
Wherein said drive unit further comprises: boottrap capacitor, it is connected to described public source terminal, and described boottrap capacitor is charged by the path of forming along the ground terminal of the internal body diodes of the described first decline switching device, described inductor and described pulse applying unit.
2. drive unit according to claim 1 further comprises internal body diodes, and it is connected to the described second decline switching device, to form the current path towards described energy storage units.
3. drive unit according to claim 1, the gate terminal of wherein said first decline switching device and the described second decline switching device is transfused to a public switch controlling signal.
4. drive unit according to claim 1, wherein said energy recovery determinant further comprises:
The rising switching device, it determines that the energy of being assembled that will be stored in the described energy storage units sends to described PDP; With
Diode, it is the unidirectional conduction device that the energy of described gathering is sent to described PDP.
5. drive unit according to claim 1, wherein said pulse applying unit comprises:
First voltage source, it supplies with first voltage;
The first voltage switch device, it optionally is sent to described PDP with described first voltage;
Second voltage source, it supplies with second voltage; With
The second voltage switch device, it optionally is sent to described PDP with described second voltage.
6. drive unit according to claim 5, wherein said second voltage is ground voltage.
7. drive unit according to claim 1, wherein said energy storage units comprises s energy storage capacitor, it is connected between described ground terminal and the described energy recovery determinant.
8. drive unit according to claim 1, wherein said pulse are to be used for producing the pulse of keeping keep discharge at discharge cell, and described discharge cell is a selected discharge cell in a plurality of discharge cells from be contained in described PDP.
9. drive unit according to claim 1, wherein said pulse is addressing pulse, this addressing pulse be used for from a plurality of discharge cells that are contained in described PDP selecting will conducting discharge cell.
10. drive unit that drives plasm display panel PDP, described drive unit comprises:
The pulse applying unit, it is applied to described PDP with pulse; With
Energy recovery unit, it comprises: inductor, the capacitive component of the panel capacitor of itself and described PDP produces LC resonance; The energy recovery determinant, its determine the energy accumulating during described LC resonance or the energy assembled to the transmission of described PDP; And energy storage units, it stores the energy of described gathering,
Wherein said energy recovery determinant comprises: the decline switching device, and it determines the gathering of described energy; With the decline diode, it is the unidirectional conduction device that is connected between described decline switching device and the described energy storage units, thereby forms the current path from described decline switching device to described this direction of energy storage units,
Wherein said decline switching device is field effect transistor FET, and the source terminal of described FET is connected to described decline diode,
Wherein said drive unit further comprises the boottrap capacitor that is connected to described source terminal, and
Wherein said boottrap capacitor is charged by the path of forming along the ground terminal of the internal body diodes of the described first decline switching device, described inductor and described pulse applying unit.
11. drive unit according to claim 10 further comprises:
The switching device driver element, it is electrically connected to the drive terminal of described decline switching device, thereby applies high level voltage or low level voltage to drive described decline switching device; With
Wherein said boottrap capacitor is connected between the electric power feeding terminal of the electric power feeding terminal of described high level voltage and described low level voltage.
12. drive unit according to claim 11, wherein said switching device driver element further comprises amplifier, the signal of the described decline switching device operation of its response control, and output high level voltage or low level voltage.
13. drive unit according to claim 12, one end of wherein said boottrap capacitor is electrically connected to high level power input end of described amplifier, and the other end of described boottrap capacitor is electrically connected to low level power input end of described amplifier and the source terminal of described decline switching device.
14. drive unit according to claim 13, wherein said switching device driver element further comprises bootstrap diode, and it is electrically connected between the described end of driving voltage source and described boottrap capacitor.
15. drive unit according to claim 12, wherein said switching device driver element further comprises:
First resistor, it is electrically connected between the gate terminal of the lead-out terminal of described amplifier and described decline switching device; With
Second resistor, it is electrically connected between the source terminal of the lead-out terminal of described amplifier and described decline switching device.
16. drive unit according to claim 11, wherein said low level voltage is a ground voltage.
17. drive unit according to claim 10, wherein said energy recovery determinant further comprises:
The rising switching device, it determines that the energy of being assembled that will be stored in the described energy storage units sends to described PDP; With
The rising diode, it is sent to described PDP for unidirectional conduction device and with the energy of described gathering.
18. drive unit according to claim 10, wherein said pulse applying unit comprises:
First voltage source, it supplies with first voltage;
The first voltage switch device, it switches described first voltage and described first voltage is sent to described PDP;
Second voltage source, it supplies with second voltage; With
The second voltage switch device, it switches described second voltage and described second voltage is sent to described PDP.
19. drive unit according to claim 18, wherein said second voltage is ground voltage.
20. drive unit according to claim 10, wherein said energy storage units comprises s energy storage capacitor, and it is connected between ground terminal and the described energy recovery determinant.
21. drive unit according to claim 10, wherein said pulse are to be used for producing the pulse of keeping keep discharge at discharge cell, described discharge cell is a selected discharge cell in a plurality of discharge cells from be contained in described PDP.
22. drive unit according to claim 10, wherein said pulse is addressing pulse, this addressing pulse be used for from a plurality of discharge cells that are contained in described PDP selecting will conducting discharge cell.
23. the energy recovering circuit in the display pannel, has panel capacitor between at least two strip electrode circuits of described display pannel in many strip electrodes circuit, wherein said energy recovering circuit reclaims electric energy or electric energy is applied to described panel capacitor from described panel capacitor, and described energy recovering circuit comprises:
Energy storage units, it charges by reclaiming electric energy from described panel capacitor;
The energy recovery determinant, the electric energy of its control from described energy storage units to described panel capacitor applies or electric energy reclaims; With
Inductor, one end are connected to an end of described energy recovery determinant, and the other end is connected to described panel capacitor,
Wherein said energy recovery determinant comprises:
Rising switching device and decline switching device, it is connected between described energy storage units and the described inductor in parallel,
The rising diode, it is connected between described rising switching device and the described inductor so that electric current from described rising switching device flow to described inductor and
The decline diode, it is connected between described decline switching device and the described energy storage units, so that electric current flows to described energy storage units from described decline switching device.
24. energy recovering circuit according to claim 23, wherein said rising switching device and described decline switching device include switching device and drive the switching device driver element of described switching device.
25. energy recovering circuit according to claim 24, a terminal of wherein said rising switching device driver element is connected to first voltage source, and another terminal of described rising switching device driver element is connected between described rising switching device and the described rising diode.
26. energy recovering circuit according to claim 25, wherein said rising switching device comprises the first terminal that is connected to described energy storage units, second terminal that is connected to described rising diode and the 3rd terminal, and wherein the electric current that flows to described second terminal from described the first terminal is applied to the signal controlling of described the 3rd terminal.
27. energy recovering circuit according to claim 26, wherein said rising switching device is FET, and described the first terminal is a drain terminal, and described second terminal is a source terminal, and described the 3rd terminal is a gate terminal.
28. energy recovering circuit according to claim 26, wherein said rising switching device driver element comprises driving element, and this driving element applies by the signal of the 3rd terminal of input signal control from described first voltage source to described first gauge tap.
29. energy recovering circuit according to claim 28, wherein said driving element comprises: driving signal input that applies described input signal; The electric power that is connected to described first voltage source applies terminal; And lead-out terminal, it is connected to the 3rd terminal of described first gauge tap.
30. energy recovering circuit according to claim 29, wherein said electric power apply terminal and are connected between described rising switching device and the described rising diode through first capacitor.
31. energy recovering circuit according to claim 24, a terminal of wherein said decline switching device driver element is connected to second voltage source, and another terminal of described decline switching device driver element is connected between described decline switching device and the described decline diode.
32. energy recovering circuit according to claim 31, wherein said decline switching device comprises the first terminal that is connected to described inductor, second terminal that is connected to described decline diode and the 3rd terminal, and wherein the electric current that flows to described second terminal from described the first terminal is applied to the signal controlling of described the 3rd terminal.
33. energy recovering circuit according to claim 32, the switching device that wherein descends is FET, and wherein said the first terminal is a drain terminal, and described second terminal is a source terminal, and described the 3rd terminal is a gate terminal.
34. energy recovering circuit according to claim 32, wherein said decline switching device driver element comprises driving element, and it applies by the signal of importing the 3rd terminal of a signal controlling from described second voltage source to described second gauge tap.
35. energy recovering circuit according to claim 34, wherein said driving element comprises: driving signal input that applies described input signal; The electric power that is connected to described second voltage source applies terminal; And lead-out terminal, it is connected to the 3rd terminal of described second gauge tap.
36. energy recovering circuit according to claim 35, wherein said electric power apply terminal and are connected between described decline switching device and the described decline diode through one second capacitor.
37. energy recovering circuit according to claim 23, wherein said energy storage units comprises capacitor, and this capacitor applies electric charge and uses the electric charge that is applied that described panel capacitor is charged by reclaim electric charge from described panel capacitor.
38. energy recovering circuit according to claim 23, wherein at the charge/discharge duration of work of described panel capacitor, described inductor and described panel capacitor produce resonance.
39. the energy recovering circuit of a display comprises:
Inductor, it is connected to described display;
Energy storage units, it recovers energy from described display; With
The energy recovery determinant, it is connected between described inductor and the described energy storage units, and wherein said energy recovery determinant has: first unidirectional path, it supplies to described display with energy from described energy storage units; With second unidirectional path, it recovers energy from described display, and described first and second unidirectional paths have the peer components that equity is arranged,
Wherein said energy recovery determinant comprises rising switching device and rising diode, and first the decline switching device and the second decline switching device, wherein after the rising diode is arranged in described rising switching device described in described first unidirectional path, and after the second decline switching device described in described second unidirectional path is arranged in the described first decline switching device
Wherein said first decline switching device and the described second decline switching device are field effect transistor FET, and their source terminal connected publicly, and
Wherein said drive unit further comprises: boottrap capacitor, it is connected to described public source terminal, and described boottrap capacitor is charged by the path of forming along the ground terminal of the internal body diodes of the described first decline switching device, described inductor and described pulse applying unit.
40. according to the described energy recovering circuit of claim 39, the wherein said first and second decline switching devices have source electrode, drain and gate, and described circuit further comprises:
Driver, it drives the described first and second decline switching devices; With
Drive source, it provides drive source voltage, the output of wherein said driver is connected to the grid of the described first decline switching device and the grid of the described second decline switching device, and described drive source is connected to the source electrode of the described first decline switching device and the source electrode of the described second decline switching device.
41. according to the described energy recovering circuit of claim 39, further comprise driving circuit, it drives the described first and second decline switching devices, wherein said driving circuit is not provided with the DC coupling condenser.
CN2007100031993A 2006-02-28 2007-02-28 Energy recovery circuit and driving apparatus of display panel Expired - Fee Related CN101030349B (en)

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KR10-2006-0019291 2006-02-28
KR20060019291 2006-02-28
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KR10-2006-0035362 2006-04-19
KR1020060035362 2006-04-19
KR1020060035362A KR100759575B1 (en) 2006-04-19 2006-04-19 Energy recovery circuit of display panel and driving apparatus therewith
KR1020060105815 2006-10-30
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KR1020060105815A KR100804535B1 (en) 2006-02-28 2006-10-30 Apparatus of driving plasma display panel

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US7554222B2 (en) * 2007-11-01 2009-06-30 General Electric Company Micro-electromechanical system based switching

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1426040A (en) * 2001-12-11 2003-06-25 三星电子株式会社 Device and method for effectively driving plasma display screen
CN1452148A (en) * 2002-04-19 2003-10-29 富士通日立等离子显示器股份有限公司 Predriving circuit, driving circuit and display apparatus
CN1606054A (en) * 2003-10-08 2005-04-13 Lg电子株式会社 Energy recovery apparatus and method of a plasma display panel
JP2005266460A (en) * 2004-03-19 2005-09-29 Matsushita Electric Ind Co Ltd Driving substrate and semiconductor power module mounted on the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100571203B1 (en) 2004-05-18 2006-04-17 엘지전자 주식회사 Driving apparatus for plasma display panel including energy recovery circuit
JP4664664B2 (en) 2004-12-17 2011-04-06 三洋電機株式会社 Power recovery circuit, plasma display and plasma display module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1426040A (en) * 2001-12-11 2003-06-25 三星电子株式会社 Device and method for effectively driving plasma display screen
CN1452148A (en) * 2002-04-19 2003-10-29 富士通日立等离子显示器股份有限公司 Predriving circuit, driving circuit and display apparatus
CN1606054A (en) * 2003-10-08 2005-04-13 Lg电子株式会社 Energy recovery apparatus and method of a plasma display panel
JP2005266460A (en) * 2004-03-19 2005-09-29 Matsushita Electric Ind Co Ltd Driving substrate and semiconductor power module mounted on the same

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