TWI294135B - Apparatus and method for driving of plasma display panel - Google Patents

Description

1294135

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device and method for a plasma display panel, and more particularly to a driving device and method for a plasma display panel that reduces initializing discharge and reduces brightness of a dark portion while shortening initialization time and capable of single scanning . ^ [Background of the Invention] The plasma display panel (?1821113〇丨5?137?3116 1; hereinafter referred to as "▼ PDP") is discharged by inactive mixing of He+Xe (氦 and 氤) or Ne+Xe (氖 and )) The resulting UV radiation of 1 47 nm causes the fluorescence & illumination to display an image including text or graphics. This p D p is not only easy to thin and large, but recent technologies have not spared much effort in providing a greatly improved image quality. In particular, since the AC type three-pole PDP discharges an electric charge wall on the surface of the panel, and the protective electrode or the like is not subjected to the emission due to the discharge, it has the advantages of low voltage driving and long life. FIG. 1 'The discharge cell of the alternating current type three-pole PDP has a scan electrode (γ) and a sustain electrode (z) formed on the upper substrate (10) and an address formed on the lower substrate (18). Electrode (χ). The scan electrode (Y) and the sustain electrode (Z) respectively comprise a transparent electrode (12Y, 12Z), and have a line width smaller than that of the transparent electrode (ΐ2γ, 12Z) and at the transparent electrode (1 2 Y, 1 2 Z) - Metal busbar electrodes (13Y, 13Z) formed by the side edges. The transparent electrode (i2Y, 12Z) is a transparent conductive metal, and is formed on the upper substrate (10) by, for example, indium tin oxide (Indium_Tin_Oxide: hereinafter referred to as n ITOff). The metal bus bar electrode (1 3Y, 1 3Z) is made of metal such as chromium (Cr) in transparent electricity.

Page 7 1294135 I5, invention description (2) ~____________ The transparent electrode scan electrode (γ) and the high resistance and high resistance of the voltage generated by the electrode (12Y' 12Z) and the main # | (12Y, 12Z) The upper substrate (10) in which the electrodes (z) are juxtaposed is laminated with an upper "antimony electric layer (14) and a protective film (丨6). The upper trapping layer (14) accumulates the wall of charge that occurs when the plasma is discharged. The protective film (16) prevents spatter damage to the upper electric layer (14) caused by the discharge of the plasma while improving the secondary electrons release efficiency. Magnesium oxide (MS〇) is generally used as the protective film (16). The address electrode (X) is orthogonal to the scan electrode (Y) and the sustain electrode (Z). And a lower electric layer (2) and a barrier wall (22) are formed on the lower substrate (18) on which the address electrode (X) is formed. The barrier ribs (22) are formed in parallel with the address electrodes (X) to prevent ultraviolet rays and visible light generated by the discharge from leaking to adjacent discharge cells. The surface of the lower electric layer (20) and the barrier wall (22) is coated with a phosphor (24). The phosphor (24) is excited by the ultraviolet rays generated by the discharge of the plasma to produce any of red, green or blue < The He+xe or Ne+Xe inactive gas mixture for discharge is injected into the discharge space of the discharge cells disposed between the upper/lower substrate (10, 18) and the barrier wall (22). The address electrode (X) of the PDp cell of this structure is selected in accordance with the relative discharge between the scan electrodes (?), and the discharge is maintained by the surface discharge between the scan electrode (?) and the sustain electrode (Z). The ultraviolet rays generated by the PDP cell by sustaining the discharge cause the visible light of the luminous body (24) to emit visible light outside the discharge cell (c e 1 1). The result is

1294135 iIII. Description of invention (3) The bay of the cell, etc. displays images. 4 丨 times, and in the horse stupid: the second holding period ‘that is to maintain the enemy sca〗 e). In the "Gray electric Ρ ) ρ ρ ρ ρ ρ ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( Separate (Address *Fi*aflie and drive ADS). 11 display Separated^ Each subfield is divided into initialization cycles, I. For example, if you want to display images in 25 6 grayscale, each recorded week and Maintain the period. j U.^sec) with 8 subfields = eight mothers, the frame period is divided into recording periods and maintenance; / ° at the same time, 8 subfields, etc.: the initialization period and the recording period are At each turn, each sub-field has a period of 2n (n, n, and the same negative side of each sub-field increases the proportion of the voxes. Thus, /, 2, 3, 4, 5, 6' 7 The gray level of the image can be displayed. The maintenance period of the graph % will be different. Therefore, referring to Fig. 2, the DT^n | is used to determine the initial condition of the panel = j is divided into 4 cycles, For selecting the cell of the cell. Recording week;, with:, the sustain period of the gray level of the reset period, and the drop of the release according to the discharge time before the first half of the initialization cycle The initial ^] rate of the extinguishing period. And the sustain electrode (ζ) is maintained at 〇ν.°, the address electrode (X) I sustaining electrode (Ζ) is applied with the display, the electrode (Υ) pair (Vs) The sustain electrode is gradually turned to the position above the discharge display voltage. ^T voltage (Vr) side, page 9 1294135 5. Description of the invention (4) The rising ramp voltage (the first ramp ^ (ramp 1) rises) Between, the discharge cell = 1). The rising slope is electrically anomalous (the (three) hair is weakly initialized [Z) and the surface of the protective film (16) on the plug-in is shaped to be second, therefore, the scanning electrode f address electrode ( x) Upper lower electric body ί 71 (-) Voltage wall ' ϊ ( z) Protective film (16) * Face will. The sun and the wall are maintained. The 乂 极 (+) voltage is initialized after the next half initialization operation j + ) The voltage (Vz) is supplied to all of the sustaining power two: the second positive polarity of the scan electrode (Y) is applied to the sustain electrode (z) In the case of the electric power below, the sustaining frequency (Vs) is gradually inclined to 〇v;: = the discharge ramp voltage (second ramp ramp2). Between the falling ramps, the falling ramps, and the annihilation discharge between the sustaining electrodes (z); ur()Y; Therefore, the cathode (-) voltage wall on the surface of the scan electrode (γ) film (η) and the anode (+) voltage wall on the surface of the sustain electrode 'm protective film (16) are quenched. And the micro-electrode occurs between the address electrode (X) and the scanning electrode (γ); the anode of the surface of the lower electric conductor layer (20) on the 5th electrode (X)) 1 The voltage wall is adjusted to the record suitable for the recording period The conditions of discharge. During the recording cycle, the scanning electrode (Υ) is first maintained at a predetermined positive polarity (+) voltage. Next, in the address electrode (X), a predetermined positive polarity (+) recording|pulse (Vx) is applied to the address electrode (X) corresponding to the selected discharge cell, and at the same time as the recording pulse (Vx), The scan pulse (Vy) is applied to the scan electrode (Υ). Therefore, in the address page, page 10, 1294135. 5, invention description (5) 1 pole (of) and sweep electrode (Y) Μ 2 〇) the surface and the intersection of the scan electrode f ν / , the Τ voltage will be located on the address f ^ ^ f ( Υ) on the 7 layer of the electric conductor layer, therefore, in the pulse (': (20) surface The fork, the specified address ίί and the sweep electrode clamp (Z) and the scanning field electrode J human scan electrode (Υ) (/彳) and the scan electrode (Υ) θ '5 record discharge. Voltage wall ' Only the film of the film (the surface of the surface of the ϋ 又 L L , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , In the maintenance of Zhouzhi, #面^形成Z) Emperor I first scan electrode (Y)

Vsus) % round production is recognized at 0V. Then, the anode (+f holds the electrode, 丨, therefore, in the hair: remember =;:; maintain the surface and dimension of the electric film (16) with V), scan the electrode (/). The voltage between the two is the record Protective film on the electrode (z) (a) a protective film of the spoon I (:: accumulation of accumulating in the electrode of the sweeping electrode (f face 护 film (16) on the surface (Λ in the maintenance of over-discharge _ No, the voltage is broken, the cell is applied by the turn-on, and is maintained by the sustain pulse (vsus) according to the record discharge selection; ^ ϊ 德 灭 period, at the sustain electrode (z) The anode (+) of the two discharge person Y 1 is extinguished by the ramp waveform (Ve). ϋ μ is slow, and the sustaining discharge is performed on the discharge cell, and the protection on the scan electrode (γ) is page 11 1294135. (6) The surface of the membrane (1 6) and the surface of the protective film (16) on the electrode (z) of the electrode (1), the occurrence of the maintenance of the second and second force D is calculated to the waveform of the extinguishing ramp (Ve) The sustain electrode (Z) of the enemy cell between the (Y) and the extinguishing discharge of the scan electrode at the scan electrode \ 。. Therefore, the accumulation wall and the accumulation of the sustain discharge In the maintenance of electricity: protection of the 7 film (丄6) surface of the cathode (-) electrode ("voltage wall are;; = the protective film (1 ... the anode of the voltage diagram of the third figure of the voltage f PDPf dynamic method, The ramp waveform is supplied from, for example, Ramp: hereinafter referred to as "V #M skin pressure supply unit (v〇Hage controUed, see Fig. 3, CR). Trace electrode (Y) 2: the feed portion has a panel, that is, connected in parallel to the scan supply portion (3 2). The ramp waveform supply unit (3 0) and the falling ramp wave generate a rising ramp waveform at the sustain voltage (= j 3〇), and there is a corresponding control signal 2 = direction rise to conduction (Vr), with and The first switch (Q1) of the waveform of the first switching slope is provided, and the signal supply unit (Γ τ τ, the gate of the first control (Q1) between the extreme and the source terminal is connected in parallel. 1 switch (R1) I l LSI) The first resistor 1st switch (Ω (, VDD). The 4th gentleman %〆亟 is connected to the common voltage source 1st switch (〇ι) Ί Λ 5; Bt, the donor (CS1) supplies the control signal to the <gate and is responsible for the switch.

Page 12 1294135 ; V. INSTRUCTIONS (7) I The first capacitor (C1) and the first resistor (R1) set the voltage that flows through the first switch (Q1) to the panel based on the positive value of RC. That is, the rising ramp waveform supplied to the panel based on the positive value of RC | will rise toward the specified direction. Therefore, as shown in the second diagram of the reset waveform, the voltage supplied from the common voltage source (VDD) will rise from the sustain voltage (Vs) to the predetermined direction as shown in the reset waveform shown in FIG. 0 0 V is turned on (V r). Then, when the potential of the turn-on voltage (V r) of about 4,000 V drops to a sustain voltage (Vs) of about 180 V, approximately -7 0 V occurs between the gate terminal and the source terminal of the first switch (Q1). The first switch (Q1) is damaged by the reverse voltage, but the first diode (D1) is mounted in parallel with the first resistor (R1) in order to prevent this from occurring. Therefore, a rising ramp waveform having a certain direction is supplied to the panel based on the RC charging time of the first resistor (R1) and the first capacitor (C1). The falling ramp waveform supply unit (32) generates a falling ramp waveform that drops to the ground potential (GND) toward the predetermined direction in the sustain voltage (Vs), has a corresponding control signal, and switches the falling ramp waveform to the second switch of the display panel (Q2) And a second control signal supply unit (CS2) installed between the gate terminal and the source terminal of the second switch (Q2). And a second resistor (C2) connected in parallel between the gate terminal and the drain terminal of the second switch (Q2) and a second resistor (R2) between the gate terminal and the second control signal supply portion (CS2) . The 开关 terminal of the second switch (Q2) is connected to the panel, and the source terminal is connected to the ground voltage source. The second control signal supply unit (CS2) will provide control signals for

1294135 I III. Description of invention (8) Give the 极端 2ΐϋ JQ2) the idle extreme and be responsible for the switch. The mountain second capacitor (C2) and the second resistor (R2) set the voltage that flows through the second switch (Q2) to the panel based on the positive value of RC. That is, according to the positive value of RC, the falling ramp waveform supplied to the panel is lowered toward the predetermined square. Therefore, as shown in the reset waveform shown in FIG. 2, the falling ramp waveform is lowered from the sustain voltage (Vs) in the predetermined direction. Ground potential ^ GND). Then 'falls to approximately ι8〇ν to ground potential (GnD) ^ 'A large reverse voltage of $ -70V occurs between the gate and source terminals of the second switch (Q2), damaging the second switch (Q2), However, in order to prevent this, the second diode (D2) is mounted in parallel with the second resistor (R2). Therefore, the voltage supplied to the panel decreases in a certain direction in accordance with the RC charge and discharge time of the varistor of the second switch (Q2) and the second capacitor (C2) between the 汲 terminal and the gate terminal. By using the voltage-controlled rising and falling ramp waveforms supplied from the VCR supply unit, the ramp time is lengthened and the ramp voltage is gradually increased. ** The method of reducing the weak discharge on one side can be reduced on the discharge space. Voltage wall and space charge are formed and the recording voltage is lowered. This type of initialization cycle reduces the background light and has the advantage of improving darkroom contrast. If you make the ramp time longer, the initialization cycle will increase. Its junction 1 has a reduced sustain period and reduced brightness. In case, in order to reduce the initialization time, the ramp current is shortened, and the discharge current is increased and the shock is reduced in the oblique waveform due to the gap voltage between the voltage of the opposite polarity and the voltage wall in the discharge cell (Oscillati〇n). The phenomenon. Therefore, will

Page 14 1294135 V. INSTRUCTIONS (9) A problem arises in which the backlight is increased due to discharge and the discharge becomes unstable, resulting in failure of recording. Therefore, it is necessary to have a new driving method, which can control the discharge current by means of the discharge cell addition instead of applying the VCR mode of supplying the waveform of the wave irrespective of the additional variation of the discharge cell, and can control the vibration of the gap voltage. Increasing the background light reduces the initialization time. OBJECT AND SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a driving apparatus and method for a plasma display panel that weakens initializing discharge and reduces dark portion brightness while shortening initialization time and capable of single scanning. In order to achieve the foregoing object, a plasma display panel driving device of the present invention has a detecting portion for detecting an initial waveform electric signal supplied from a voltage source to a display panel, and a control portion for controlling the Detector according to the foregoing The measured electrical signal is supplied to the initial waveform electrical signal of the display panel from the voltage source. The control unit is a switching element disposed between the voltage source and the display panel. The aforementioned electrical signals are either current or voltage. And the aforementioned voltage source is any one of a set up voltage source and a set down voltage source. And the detecting unit is a resistive element mounted between the control unit and the display panel. Further, the resistive element adjusts the rising direction of the initializing waveform supplied to the display panel. Further, the resistive element adjusts the descending direction of the initializing waveform supplied to the display panel. In addition, a diode having a polarity between the voltage source and the display panel is further provided.

Page 15 1294135 I V. Description of invention (10) 1 body. Finally, the control unit further includes a control unit having the control unit of the switching element and a supply unit mounted between the display panel to control the control signal of the switching element. The plasma display panel driving device of the present invention has a first detecting portion for detecting a turn-on voltage source, a turn-off voltage source, and a first initializing waveform electrical signal supplied from the turn-on voltage source to the display panel; a control unit configured to control a first initialization waveform electrical signal supplied from the on-voltage source to the display panel according to the detected electrical signal; and a second detecting unit configured to detect the supply from the disconnected voltage source a second initialization waveform electrical signal to the display panel; and a second control unit for controlling a second initialization waveform electrical signal supplied from the disconnection voltage source to the display panel according to the detected electrical signal. The first control unit is a first switching element provided between the on-voltage source and the display panel. Next, the second control unit is a second switching element provided between the off voltage source and the display panel. Furthermore, the electrical signal is any one of current and voltage. Further, the first detecting unit is a first resistive element provided between the first control unit and the display panel. Further, the first resistive element adjusts the rising direction of the first initializing waveform supplied to the display panel. Further, the second detecting unit is a second resistive element provided between the second control unit and the disconnection voltage source. Further, the second resistance element adjusts a downward direction of the second initialization waveform supplied to the display panel. Further, the first diode is provided between the on-voltage source and the display panel.

Page 16 1294135 I5, invention description (11) i Last, first, there is a second diode installed between the aforementioned disconnection voltage source and the display panel. Second, the first control unit further includes a control terminal of the first switching element and a first control signal supply unit mounted between the display panels. Third, the second control unit further includes a control terminal of the second switching element and a second control signal supply unit provided between the display panels. The driving method of the plasma display panel of the present invention comprises: detecting a phase of initializing a waveform electrical signal supplied from a voltage source to the display panel; and controlling the supply of the electrical signal from the voltage source to the display according to the detected electrical signal The panel initializes the phase of the waveform electrical signal. Wherein, the electrical signal is one of current and voltage. Second, the voltage source is any one of a turn-on voltage source and a turn-off voltage source. Finally, the stage of controlling the initial waveform electric signal is adjusted in any one of a rising direction and a falling direction of the initializing waveform supplied to the display panel. The plasma display panel driving method of the present invention comprises: detecting a phase of the first initializing waveform electrical signal supplied from the on-voltage source to the display panel, and controlling the supply from the aforementioned on-voltage source according to the detected electrical signal to a stage of the first initialization waveform electrical signal of the display panel, detecting a phase of the second initialization waveform electrical signal supplied from the disconnection voltage source to the display panel, and controlling the disconnection voltage according to the detected electrical signal The source is supplied to the second initialization waveform electrical signal of the aforementioned display panel. Wherein, the electrical signals of the first and second initialization waveforms are current

Page 17 1294135 IIII. Description of invention (12) Any of i and voltage. Next, the stage of controlling the first initializing waveform electrical signal adjusts the rising direction of the first initializing waveform supplied to the display panel. Finally, the stage of controlling the second initializing waveform electrical signal adjusts the falling direction of the second initializing waveform supplied to the display panel. DETAILED DESCRIPTION OF THE INVENTION In addition to the foregoing objects, various objects and advantages of the present invention will become apparent from the accompanying drawings. Hereinafter, reference will be made to Figs. 4 and 15b of the embodiment of the present invention and will be described in detail. Referring to Fig. 4, a plasma display panel driving device according to an embodiment of the present invention has a power supply portion (36), and a ramp waveform for controlling a discharge current supplied from a power supply portion (36) to a panel (39) and generating a ramp waveform. The supply unit (38) 〇 the ramp waveform supply unit (38) further has a current detector (4 1) for detecting the current supplied from the power supply unit (36), and based on the detected current The control is supplied from the power supply unit (36) to the discharge current control unit (43) of the panel (39). Referring to Figures 5 and 6, a first embodiment of the present invention will be described. The supply unit (40) of the rising initializing waveform of the plasma display panel supplies the rising voltage of the on-voltage of the on-voltage source (Vup) to the panel with the sustain voltage (Vr ef) toward the predetermined direction, and has a corresponding control Signal and switch the voltage supplied from the on-voltage source (Vup) to the switch of the panel (5 Q 1 ), the first terminal installed between the source terminal of the switch (5 Q 1) and the panel

1294135 V. INSTRUCTIONS (13) A resistor (5 R 1) is provided between the gate terminal of the switch (5 Q 1) and the panel to supply a control signal to the control signal supply unit (5CS) of the gate terminal. * The switch (5Q1) is connected to the drain terminal of the on-voltage source (Vup) and to the gate terminal of the supply conduction control signal and the source terminal of the panel. Here, the switch (5Q1) generally uses a field effect transistor (FET). The control signal supply unit (5CS) supplies a control signal to the gate terminal of the switch (5Q1) and is responsible for the switch. Therefore, a resistor 2 (5R2) is provided between the gate terminal of the switch (5 Q1) and the control signal supply portion (5 C S). The first resistor (5R1) controls the switch (5Q1) by detecting the current flowing to the panel through the switch (5Q1) according to the resistance value. The current supplied to the panel is controlled according to the resistance value of the first resistor (5R1), and the rising initialization voltage wall has a predetermined rising direction. Here, the first resistor (5R1) can use a variable resistor. Specifically, when a voltage of 3 to 4 V is supplied from the control signal supply unit (5CS), a DC voltage is supplied from the on-voltage source (Vup) to the panel so that the switch (5 Q1) is turned on. Therefore, panel discharge occurs on the panel, and the power drop is displayed across the first resistor (5 R1) by discharging the discharge current through the panel. Therefore, a voltage drop occurs between the gate terminal and the source terminal of the switch (5 Q1), and the switch (5 Q 1) is turned off. Therefore, the initialization waveform is supplied to the panel with the sustain voltage (Vre f) rising toward the on-voltage of the on-voltage source (Vup) toward the predetermined direction.

Page 19 1294135 V. INSTRUCTIONS (14) On the other hand, a diode can be installed, connected between the disconnection voltage source (Vdn) and the panel to block the reverse current supplied from the panel. Referring to Fig. 7 and Fig. 8, the falling initialization waveform supply unit (42) of the plasma display panel according to the second embodiment of the present invention is lowered to the off voltage source (Vdn) with the sustain voltage (Vref) directed in a predetermined direction. The falling voltage is initialized to the Φ board, and has a corresponding control signal and switches the voltage supplied to the panel to the open voltage source (Vdn) switch (7Q1), the switch (7Q1), and the open voltage Control of the first resistor (7R1) between the source (Vdn), the gate terminal connected to the switch (7Q1) and the open voltage source (Vdn) and supplying the control signal to the gate terminal of the switch (7Q1) Signal supply unit (7CS). The switch (7 Q 1) consists of a terminal connected to the top of the panel and connected to the source terminal of the supply control signal and the source of the open voltage source (Vdn). Here, the switch (7 Q1) generally uses a field effect transistor (F E T). The control signal supply unit (7CS) supplies a control signal to the gate terminal of the switch (7Q 1) and is responsible for the switch. Therefore, a second resistor (7R2) is provided between the gate terminal of the switch (7Q1) and the control signal supply portion (7CS). The first resistor (7R1) controls the switch (7 Q1) by detecting the current flowing to the panel through the switch (7Q1) by the resistance value. Further, the current supplied to the panel is controlled by the resistance value of the first resistor (7 R 1), and the falling initialization voltage wall has a predetermined falling direction. Here, the first resistor (7R1) can use a variable resistor. Specifically, when a voltage of 3 to 4 V is supplied from the control signal supply unit (7CS), the power transmitted from the panel is turned on by opening the switch (7 Q1).

Page 20 1294135 j V. Description of the invention (15) The turbulent flow to the disconnected voltage source (Vdn). Therefore, the panel is discharged, and the voltage drop is displayed across the first resistor (7R1) by discharging the discharge current through the panel. Therefore, a voltage drop occurs between the gate terminal and the source terminal of the switch (7Q1), and the switch (7Q1) is turned off. Therefore, each of the initializing waveforms which are lowered to the off voltage of the off voltage source (Vdη) in the predetermined direction with the sustain voltage (V r e f) is supplied to the panel. On the other hand, a diode can be mounted, connected between the on-voltage source (Vup) and the panel for interrupting the reverse current supplied from the on-voltage source (Vup). Referring to Fig. 9, a driving device for a plasma display panel according to a third embodiment of the present invention has a rising initializing waveform supply portion (50) for supplying a rising waveform to a panel during an initialization period, and a rising initializing waveform for The falling initializing waveform is supplied to the falling initializing waveform supply unit (52) of the panel. The rising initializing waveform supply unit (50) has a corresponding control signal and switches the voltage supplied from the on-voltage source (Vup) to the first switch (9 Q1) of the panel, the source terminal of the switch (9 Q1), and the panel. The first resistor (9R1) is provided between the gate terminal of the first switch (9Q1) and the panel to supply a control signal to the first control signal supply unit (CS1) of the gate terminal. The first switch (9Q1) is connected to the drain terminal of the on-voltage source (Vup), and is connected to the gate terminal for supplying the conduction control signal and the source terminal of the panel. Here, the first switch (9Q1) generally uses a field effect transistor.

1294135 iIII. Invention description (16) | [i FET) 〇 [The first control signal supply unit (CS1) supplies the control signal to the gate of the first open j (9 Q 1) and is responsible for switching. Therefore, a second resistor (9R2) is disposed between the gate terminal of the first switch (9 Q 1) and the first control signal supply portion (CS 1). The first resistor (9R1) is detected by the resistance value according to the first value. The switch (9Q1) flows to the panel current to control the first switch (9Q1). The current supplied to the panel is controlled according to the resistance value of the first resistor (9 R 1), and the rising initializing waveform voltage has a predetermined rising direction. Here, the first resistor (9 R1) can be a variable resistor. Then, a diode can be mounted, connected between the on-voltage source (Vup) and the panel for interrupting the reverse current supplied from the on-voltage source (Vup). The falling initializing waveform supply unit (52) has a second switch (9Q2) corresponding to the control signal and switching the voltage supplied to the panel to the off voltage source (Vdn), the second switch (9Q2), and the off voltage The third resistor (9R3) between the source (Vdn), the gate terminal of the second switch (9Q2), and the off voltage source (Vdn) are used to supply the control signal to the first switch (9Q1). The second control signal supply unit (CS2) of the gate terminal. The second switch (9Q2) is composed of a terminal connected to the top of the panel, and a source connected to the gate terminal for supplying the conduction control signal and the voltage source for disconnecting (Vdn). Here, the second switch (9Q2) generally uses a field effect transistor (FET) 〇

1294135 I. INSTRUCTION DESCRIPTION (17) The second control signal supply unit (CS2) supplies a control signal to the gate terminal of the second switch (9Q2) and is responsible for switching. Therefore, a fourth resistor (9R4) is provided between the gate terminal of the second switch (9Q2) and the second control signal supply portion (CS2). The third resistor (9R3) detects the second switch (9Q2) by detecting the current flowing to the panel through the second switch (9Q2) according to the resistance value. The current supplied to the panel is controlled according to the resistance value of the third resistor (9R3), and the falling initializing waveform voltage has a predetermined falling direction. Here, the third resistor (9R3) can use a variable resistor. A diode can then be installed, connected between the disconnected voltage source (Vdn) and the panel to interrupt the reverse current supplied from the panel. According to the driving device for the plasma display panel of the third embodiment of the present invention, when the voltage of 3 to 4 V is supplied from the first control signal supply unit (CS1), the on-voltage is turned on by turning on the first switch (9Q1). The DC current from the source (Vup) is supplied to the panel. Therefore, the panel discharge occurs, and the panel discharges to discharge the discharge current to show a voltage drop across the resistor (9 R 1). Therefore, a voltage drop occurs between the gate terminal and the source terminal of the first switch (9 Q 1), and the first switch (9 Q 1) is turned off. Therefore, the rising initializing waveform rising to the on-voltage source (Vup) is supplied to the panel with the sustain voltage (V r e f) toward the predetermined direction. After supplying the voltage of 3 to 4 V from the second control signal supply unit (CS2), the panel current is caused to flow to the off voltage by turning on the second switch (9Q2). source

1294135 V. Description of invention (18) (Vdn). Therefore, panel discharge occurs on the panel, and voltage drop occurs across the third resistor (9R3) by discharging the panel through the discharge current. Therefore, a voltage drop occurs between the gate terminal and the source terminal of the second switch (9Q2), and the second switch (9Q2) is turned off. Therefore, the initialization waveform of the falling voltage falling to the off voltage source (Vdn) is supplied to the panel with the sustain voltage (Vref) directed toward the predetermined direction. As described above, the driving device for the plasma display panel of the present invention (hereinafter referred to as "CCR supply unit") causes the slave voltage source (Vup) to be turned on via the first and second switches (9Q1, 9Q2) of the switch in accordance with the control signal. The supplied voltage is used to control the current supplied to the panel by the first and third resistors (9R1, 9R3), and the rising or falling initializing waveform is supplied to the scanning line of the panel. Thus, the CCR supply unit of the present invention controls the current supplied to the panel and controls the vibration of the gap voltage, thereby reducing the initialization time while reducing the background light and improving the contrast. Fig. 10(a) is an equivalent circuit diagram showing a general discharge cell, which is composed of a capacitor (Cp) and two Zener diodes (Zdl, Zd2). Here, the Zener diodes (Zdl, Zd2) will undergo Zener Breakdown at 21 0V. The VCR and CCR waveforms of Figures 10(b) and (c) are applied with the same sustain voltage ( Vref) and a turn-on voltage source (Vup). From the VCR of Fig. 10(b), the initial waveform is a waveform generated by RC charge and discharge irrespective of the additional variation of the discharge cell. Conversely, from the CCR of Figure 10 (c), electricity can be seen at the point of discharge.

1294135 V. Description of invention (19) Pressure waveform (A) changes. This is caused by the supply of the first resistor (9R1, 5R1) to control the supply current. At this time, the amount of discharge current of the CCR will be less than that of the VCR. 1 1 ( a ), ( b ) shows the supply of the rising initializing waveform, and the on-voltage of the on-voltage source (Vup) is lowered to the sustain voltage (Vref). The voltage waveform and optical waveform of the VCR and CCR. The light waveform here is the light waveform generated by the discharge current. In Fig. 1(a), the conventional VCR voltage waveform is such that the on-voltage of the on-voltage source (Vup) drops to the sustain voltage (Vref), and the switching of the first switch (Q1) shown in Fig. 3 is performed. The resulting noise (N〇ise) naturally causes the damping phenomenon to be displayed as a light waveform (LW). When the current component of self-extinguishing (Se) is applied to the light waveform (LW), an error discharge (missing) as shown in Fig. 12(a) occurs. Referring to Fig. 22(a), it can be seen that the erroneous discharge caused by the noise reduction of the switch and the self-extinguishing (Se) discharge continuously detects the unstable high peak voltage (HP) in the light waveform. This is because when the initialization period is shortened and the rising and falling initializing waveforms are supplied between 20 and / s, respectively, when the rising initializing waveform is supplied, the discharge current in the discharge cell is suddenly increased and overdischarge occurs, causing the voltage wall. increase. Therefore, after the rising initializing waveform is supplied, a self-extinguishing (Se) discharge phenomenon occurs and the recording fails. Conversely, in Fig. 22(b), the CCR initialization waveform of the present invention drops to the sustain voltage with the turn-on voltage of the turn-on voltage source (Vup).

1294135 ; 3, invention description (20) U Vref), as shown in Fig. 5 and Fig. 9, the noise caused by the switching action of the first switch (5Q1, 9Q1) naturally causes the damping phenomenon (Damp i Ng) only shows the light waveform (LW) without erroneous discharge. Since this is the manner in which the CCR supply unit of the present invention controls the supply current, it limits the case where the conventional VCR applies a current component of the self-extinguishing (Se) discharge to the optical waveform (LW), as shown in Fig. 12(b). , shows a stable light waveform without showing the recording failure. The following is a comparison of the experimental data of Figs. 1 3 a to 15 b to compare the C C R of the present invention with the conventional V C R . The 1st to the 1st 3th graph compares the supply time of the falling initialization waveform with respect to the supply time of 20/zs, 50//s, 100//s, and 150# s of the rising initial waveform (2 0" s, 5 0 // s, 1 0 0 // s, 15 0/zs) background light (VCR: Ή K, CCR: ι〇π) and sustain period full white (ful 1 white) ( VCR: ” H, CCR: 〃·") changes.

In Fig. 3, when the supply time of the rising initializing waveform is 20/s, the shorter the supply time of the falling initializing waveform, the more the CCR background light brightness of the present invention is lower than the conventional VCR, and the initializing waveform is lowered. When the supply time is 2 s, the full white brightness of the sustain period is higher than the conventional VCR, and the more it increases to 50 @ s, 1 0 0 // s, 1 5 0 # s, the more and the known VCR similar. In Fig. 1b, when the supply time of the rising initial waveform is 5 0/s, the supply time of the falling initial waveform is 2 0 // s, 5 0 // s, 1 00/zs, 1 50/zs Sometimes, the CCR background brightness of the present invention is bright.

1294135; V. Description of the Invention (21) \ shows that the VCR is lower than the conventional VCR, and the full white luminance of the sustain period shows slightly higher than the VCR at all times. In the 1st 3th and 13th graphs, when the supply time of the rising initial waveform is 1 0 0/s and 1 5 0/s, the supply time of the falling initial waveform is 20/zs, 50/zs, When both 100//s and 150//s are present, the brightness of the backlight is that the CCR brightness display of the present invention is lower than the conventional VCR, and the full white brightness of the sustain period is slightly higher than the VCR at all times. As seen in Figure 13, the shorter the initial supply of the CCR and VCR, the shorter the supply time of the initial waveform, the stronger the discharge will cause the background light to increase, and the overall background and brightness of the CCR will be lower than the VCR. In particular, when the supply time of the rising initializing waveform is 20/s s, the conventional VCR vibrates the applied voltage and the gap voltage between the voltage walls in the discharge cell after the initializing discharge occurs, so that the background is vibrated. The light shows a higher CCR than the present invention. Conversely, the CCR of the present invention exhibits a background light brightness that is lower than the conventional V C R after the initial discharge has occurred, because the discharge is urgently supplied to the column. The brightness of the rising initialization waveform supplied between the time of 5 0# s~1 5 0//s can be seen that the results of the VCR and the CCR are almost the same. On the other hand, when the initial waveform of the VCR supply rise and fall is all 20/s s, the brightness of the background light rises sharply due to the erroneous discharge, and the brightness of the sustain period can be seen to decrease. Therefore, since the contrast is lower as the background light is higher, it is found that the background light of the CCR of the present invention is lower because it is lower than the conventional VCR. Figure 14 shows the time of the initial waveform based on the rise and fall of the supply.

1294135 丨 three, invention description (22) i comparison. The horizontal axis is the supply time of the falling initialization waveform, and the vertical axis on the left side is the supply time of the rising initializing waveform, and the vertical axis on the right side is the contrast 0. In the first picture, the time for initializing the rising and falling waveforms is 20 // s, 50/zs, 100" s, 150//s, it can be seen that the comparison of the conventional VCR mode is much lower than the comparison of the CCR mode of the present invention. In particular, in order to reduce the initialization period and reduce the time of the initialization waveform for supplying the rising or falling to 2 0/zs, the comparison of the CCR method of the present invention to the conventional VCR in the region where the erroneous discharge does not occur is shown to be about 12 %. This is because when the time of the initializing waveform for supplying the rising or falling is reduced to 20/s s, the erroneous discharge does not occur in the VCR mode, so that the contrast of the CCR of the present invention can be seen to be extremely high. Fig. 15a is a supply time of the initial waveforms of the VCR and CCR in the same background light luminance comparison, the horizontal axis is the background light, and the vertical axis is the supply time of the initializing waveform. In Fig. 15a, it can be seen that the CCR of the present invention has a shorter supply time than the conventional VCR supply initialization waveform at the same background and brightness. Referring to Fig. 15b, when the VCR and CCR have the same luminance value, the CCR can reduce the initial waveform supply time of 50/z s to 7 5/z s more than the VCR. That is, when the brightness of the background light is 1. 0 8 (cd / m2 ), the initial waveform supply time of the VCR is 1 5 0 // s, in order to make the initial waveform supply time of the CCR become 1 0 0 // s, this The inventive CCR can reduce the initial waveform supply time by about 5 0//s s from the conventional VCR.

1294135 V. Description of invention (23) When the background luminance is 1 · 0 ( cd/m 2 ), the initial waveform supply time of the VCR is 3 0 / / s, in order to make the initial waveform supply time of CCR become 2 2 5 / / s, the CCR of the present invention can reduce the initialization waveform supply time by about 75 // s over the conventional VCR. The reason is that the CCR can be shortened by approximately 2 5% to 3 3% from the VCR when the same background luminance value is compared with the initial waveform supply time of the CCR and VCR. [Effect of the Invention] As described above, according to the driving device and method of the plasma display panel of the present invention, the time of the sustain period can be increased by reducing the initialization time, so that the brightness can be improved. The driving device and method for the plasma display panel of the present invention is to reduce the brightness of the dark portion and improve the contrast during the initialization period, and to shorten the initialization, after detecting the initial waveform waveform signal supplied to the discharge cell to control the rising and falling initial waveforms. The time increases the recording period and can be scanned in a single. In particular, it is possible to maintain or increase the period to increase the brightness. From the above description, it is known that the manufacturer can make various changes and modifications without departing from the scope of the technical idea of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the description of the invention in the specification, but should be determined according to the scope of the patent application.

1294135 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a discharge cell of a general AC type three-pole plasma display panel; Fig. 2 is a driving waveform diagram of a PDP discharge cell shown in Fig. 1; FIG. 4 is a block diagram of a voltage-controlled ramp waveform supply unit for supplying a ramp waveform; FIG. 4 is a block diagram of a plasma display panel driving device according to an embodiment of the present invention; FIG. 5 is a first embodiment of the present invention. The waveform of the initializing waveform supply unit is generated by the rise of the rising initializing waveform; the output waveform waveform of the driving device for the rising initializing waveform shown in FIG. 5; FIG. 7 is a second embodiment of the present invention for generating the falling initialization. FIG. 8 is a waveform diagram of an output waveform of a falling initializing waveform driving device illustrated in FIG. 7; FIG. 9 is a circuit diagram of a driving device of a plasma display panel according to a third embodiment of the present invention; The 1 0 figure compares the waveforms of the voltage-controlled and current-controlled initialization waveforms supplied to the equivalent circuit and the discharge cell of the discharge cell; A waveform diagram of voltage waveforms and optical waveforms of VCR and CCR when the initializing waveform is supplied to the discharge cell, and is turned on to maintain the voltage; FIG. 2 is a waveform diagram showing the presence or absence of an erroneous discharge of the conventional VCR and the CCR of the present invention. ;

Page 30 1294135 ί 图 Simple description

I

Figures 13a to 13d are background light of the conventional VCR and the CCR of the present invention at the supply time and an all-white luminance map at the sustain period; Figure 14 compares the conventional VCR with the present invention. CCR ramp waveform supply time comparison chart; 15th a picture is the same as a background light brightness comparison VCR and CCR ramp waveform supply time map; and 15b picture with the same background light brightness , VCR and CCR provide a shortened ratio map between the Japanese temples for the initial waveform. [Description of Symbols] 5CS, 7CS Control Signal Supply Unit 5Q Bu 7Q1 Switch 5R Bu 7R Bu 9R Bu R1 1st Resistor 5R2, 7R2, R2 2nd Resistor 9R3 3rd Resistor 9R4 4th Resistor 9Q Bu Q1 1st Switch 9Q2, Q2 second switch 10 upper substrate 12Y, 12Z transparent electrode 13Y, 13Z metal electrode 14 upper electric layer 16 protective film 18 lower substrate

1294135 Simple description of the diagram 2 4 30 40, 50 32 42, 52 36 38 39 41 detector) 43 A Cl C2 CCR supply Cp Cr

CS1 CS2 D1 D2 FET Lower ferroelectric layer partition phosphor phosphor rising ramp waveform supply unit rising initial waveform supply unit falling ramp waveform supply unit falling initialization waveform supply unit power supply unit ramp waveform supply unit panel current detection unit (current control unit voltage waveform First capacitor second capacitor plasma display panel drive device capacitor chrome first control signal supply unit second control signal supply unit first diode second diode transistor

Page 32 1294135 Schematic description GND Ground potential HP spike voltage ITO Tin indium oxide LW Optical waveform MgO Magnesium oxide PDP Plasma display panel ramp 1 Ramp ramp voltage ramp 2 Falling ramp voltage Se Self-extinguishing VCR Ramp voltage control VDD Common voltage source Vdn disconnected voltage source Ve extinguished ramp waveform Vr turn-on voltage Vref sustain voltage Vs, Z sustain electrode Vsus sustain pulse Vup turn-on voltage source Vx recording pulse Vy scan pulse Vz positive polarity voltage address electrode Y scan electrode ZcH, Zd2 Zener diode

Page 33

Claims (1)

1294135 1294135 6. The upward direction of the waveform of the patent application scope. 7. The driving device of the plasma display panel of claim 5, wherein the resistive element adjusts a downward direction of the initializing waveform supplied to the plasma display panel. 8. The driving device of the plasma display panel of claim 1, further comprising a diode disposed between the voltage source and the plasma display panel. 9. For the driving device of the plasma display panel of claim 2, The control unit further includes a control end of the switching element and a control signal supply unit disposed between the plasma display panel for controlling the switching element. 10. A driving device for a plasma display panel, comprising: a first detecting portion for detecting a turn-on voltage source, a turn-off voltage source, and a first supply from the turn-on voltage source to the plasma display panel Initialize the waveform electrical signal; a first control unit configured to control the first supply from the on-voltage source to the plasma display panel according to the detected electrical signal Page 35 1294135 [Calculation, patent application range j Initialize waveform electrical signal; | | A second detection unit for detecting a second initializing waveform electrical signal supplied from the disconnected voltage source to the plasma display panel And a second control unit for controlling the initial waveform electric signal supplied from the disconnection voltage source to the plasma display panel according to the detected electrical signal. 11. The driving device for a plasma display panel according to the first aspect of the invention, wherein the first control unit is a first switching element disposed between the on-voltage source and the plasma display panel. 1 . The driving device of the plasma display panel of claim 10, wherein the second control unit is a second switching element disposed between the disconnection voltage source and the plasma display panel. 1 3. A driving device for a plasma display panel according to claim 10, wherein the electrical signal is any one of current and voltage. The driving device of the plasma display panel of claim 10, wherein the first detecting portion is installed in the first control portion and the plasma Page 36 1294135 I. Patent scope L. A display. A first resistance element between the panels. A driving device for a plasma display panel according to claim 14 wherein the first resistive element adjusts a rising direction of the first initializing waveform supplied to the plasma display panel. The driving device of the plasma display panel of claim 10, wherein the second detecting portion is a second resistive element disposed between the second control portion and the off voltage source . 17. The driving device for a plasma display panel according to claim 16 wherein the second resistive element adjusts a downward direction of the second initializing waveform supplied to the plasma display panel. 18. The driving device for a plasma display panel according to claim 10, further comprising a second diode disposed between the on-voltage source and the plasma display panel. 1 9. The driving device of the plasma display panel as claimed in item 10 of the patent scope, 1294135 6. Patent application scope Further includes a second diode disposed between the disconnection voltage source and the plasma display panel. The driving device of the plasma display panel of claim 1 , wherein the first control unit further comprises a control end of the first switching element and is disposed between the plasma display panel. A first control signal supply unit. The driving device of the plasma display panel of claim 12, wherein the second control unit further comprises a control end of the second switching element and is disposed between the plasma display panel. A second control signal supply unit. 2, a method for driving a plasma display panel, comprising the steps of: detecting an initial waveform electrical signal supplied from a voltage source to the plasma display panel; and controlling the electrical signal according to the detected electrical signal The initial waveform electrical signal supplied to the plasma display panel by the source. 1294135 VI. Application for Patent Range 2 3. The driving method of the plasma display panel as claimed in Item 2 of the patent application, wherein the electrical signal is any one of current and voltage. 2. The driving method of the plasma display panel of claim 22, wherein the voltage source is any one of a turn-on voltage source and a turn-off voltage source. The driving method of the plasma display panel according to the second aspect of the patent application, wherein the step of controlling the initial waveform electrical signal adjusts the rising direction and the falling direction of the initializing waveform supplied to the plasma display panel. One direction. A driving method for a plasma display panel, comprising the steps of: detecting a first initializing waveform electrical signal supplied from a conducting voltage source to the plasma display panel; controlling the electrical signal according to the detected electrical signal Turning on the first initialization waveform electrical signal to the plasma display panel; the debt measurement is supplied from a disconnected voltage source to the plasma display panel 1294135 I. Patent application scope, __ second initializing waveform electrical signal; and controlling the second initializing waveform electrically supplied from the disconnecting voltage source to the plasma display panel according to the detected electrical signal Signal. 2 7. The driving method of the plasma display panel of claim 26, wherein the electrical signals of the first and second initializing waveforms are any one of current and voltage. 2. The driving method of the plasma display panel of claim 26, wherein the step of controlling the first initializing waveform electrical signal adjusts a rising direction of the first initializing waveform supplied to the plasma display panel. 2. The driving method of the plasma display panel of claim 26, wherein the step of controlling the second initializing waveform electrical signal adjusts a falling direction of the second initializing waveform supplied to the plasma display panel. 1294135 Page 5