JPH064039A - Ac type plasma display panel and driving circuit therefor - Google Patents

Abstract

PURPOSE:To provide the driving circuit of the AC type plasma display panel which is reduced in the peak current of the charging and discharging of a panel capacitance by dispersing the charging and discharging currents at the time of maintaining discharging pulses. CONSTITUTION:This driving circuit drives the AC type plasma display panel 1 in surface discharge structure equipped with X electrodes X1-XP and Y electrodes Y1-YN, and address electrodes A1-AM; and the X electrodes X1-XP and Y electrodes Y1-YN are divided into P blocks (P = 4 in the figure). Then the driving circuit has P X-side driver circuits XD1-XDP which apply high- voltage pulses to the X electrodes X1-XP, block by block, and Y-side driver circuits YD1-YDP which apply maintaining discharging pulses to the Y electrodes Y1-YN, block by block; and the P X-side driver circuits XD1-XDP and P Y-side driver circuits YD1-YDP generate pulse voltages which are out of phase with one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC type plasma display panel for driving an AC type plasma display panel having a surface discharge structure provided with electrodes for sustaining discharge and address electrodes for writing data. The present invention relates to a drive circuit, and more particularly to a drive circuit for an AC type plasma display panel in which the peak charge / discharge current due to the panel capacitance is reduced by reducing the concentration of the charge / discharge current when a sustain discharge pulse is applied.

[0002]

2. Description of the Related Art FIG. 4 shows a sectional structure (FIG. 4 (1)) and an electrode structure (FIG. 4 (2)) of a conventional surface discharge AC type plasma display panel.

In FIG. 1, a conventional surface discharge AC type plasma display panel has an X electrode X and a Y electrode Y _k (k = 1 to N; N is an arbitrary positive integer) for sustaining discharge.
Are parallel to each other in the dielectric layer 52, and address electrodes A _i (i = 1 to M; M is an arbitrary positive integer) for writing data are opposed to each other to form a surface discharge structure. ing.

As described above, since the panel itself has a capacitive structure, once a discharge is generated, a voltage (sustain voltage) lower than the discharge start voltage is applied by a pulse (sustain discharge pulse) thereafter. Therefore, the discharge can be continuously maintained. Light is emitted by exciting phosphors with light or ultraviolet rays generated during discharge, and the emission brightness becomes bright in proportion to the frequency of discharge.

FIG. 5 shows a configuration diagram of a drive circuit for driving the surface discharge AC type plasma display panel, and FIG. 6 shows voltage waveforms of respective parts. In this conventional example, the sustain discharge electrodes of the surface discharge structure are connected to a common sustain discharge driver, and sustain discharge is performed by applying sustain discharge pulses of the same phase as shown in FIG. 6 over the entire panel surface. Among the sustain discharge electrodes, the X electrode X is connected to the X side driver circuit 61 by a common connection, and the Y electrode Y _k applies a write pulse line-sequentially when writing data to the panel, so that it can be driven independently. It is connected to possible Y-side driver circuits 62 and Y-side drivers ICYIC1 to YIC4.

[0006]

Therefore, in the conventional AC type plasma display panel and its driving circuit, when the panel is large, the panel capacity also becomes large and the sustain discharge pulse of the same phase is applied. In addition, the peak current at the time of discharge becomes a considerably large current, and a power source having a large supply current capability is required, which causes a problem of high cost.

Further, the capacitor for supplying current becomes large, which is a factor that hinders the thinning of the unit. Further, since radiation noise generated when the supply current reaches its peak also increases, it is necessary to take measures such as shielding.

The present invention solves the above problems.
By driving an AC type plasma display panel having a surface discharge structure including electrodes for sustaining discharge and address electrodes for writing data, by dispersing a charging / discharging current when a sustaining discharge pulse is applied. An object of the present invention is to provide a driving circuit for an AC type plasma display panel in which the peak current of charging / discharging due to the panel capacity is reduced.

[0009]

In order to solve the above-mentioned problems, a driving circuit for an AC type plasma display panel according to the first feature of the present invention includes electrodes for sustaining discharge,
A driving circuit for driving an AC plasma display panel having a surface discharge structure, comprising: an address electrode for writing data;
The C-type plasma display panel is divided into P blocks (P is an arbitrary positive integer), and P driving means for applying a sustain discharge pulse to the sustain discharge electrodes is provided for each block. Driving means generate sustain discharge pulses whose phases are shifted from each other.

The AC type plasma of the second feature of the present invention
The drive circuit of the display panel is as shown in FIG.
X electrode X for sustaining discharge₁~ X_PAnd Y electrode Y
₁~ Y_N(N is any positive integer) and write data
Address electrode A for performing ₁~ A_M(M is an arbitrary adjustment
AC plasma display having a surface discharge structure including
A drive circuit for driving the panel 1, wherein the X electrode X
₁~ X_PAnd Y electrode Y ₁~ Y_NIs the AC plasma
P block in display panel 1 (P is an arbitrary adjustment
By the number, P = 4) in FIG.
X₁~ X_PP high-voltage pulse is applied to each block
X side driver circuits XD1 to XDP and the Y electrode Y₁~
Y_NP sustaining pulses are applied to each block for each Y
Side driver circuits YD1 to YDP.
P X-side driver circuits XD1 to XDP and P Y-sides
The driver circuits YD1 to YDP are in phase with each other.
Generate staggered pulse voltages.

[0011]

In the drive circuit for the AC type plasma display panel of the first and second features of the present invention, as shown in FIG.
Sustain discharge electrode for performing sustain discharge, that is, X electrode X ₁
To X _P and Y electrodes Y ₁ to Y _N a (N is an arbitrary positive integer),
The AC plasma display panel 1 is divided into P blocks (P is an arbitrary positive integer, P = 4 in FIG. 1), and each block is divided into X-side driver circuits XD _j (j = 1).
To P), a high-voltage pulse is applied to the X electrode X _j , and a sustain discharge pulse is applied to the Y electrodes Y ₁ to Y _N by the Y-side driver circuit YD _j as pulse voltages having mutually shifted phases.

Therefore, the peak current of charging / discharging due to the panel capacity can be reduced to 1 / (P) of the number of divided blocks as compared with the conventional case.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a configuration diagram of a drive circuit of an AC type plasma display panel according to an embodiment of the present invention. Further, FIG. 2 shows a configuration diagram of an AC type plasma display panel 1 which is a drive target of the drive circuit of the present embodiment.

The AC type plasma display panel 1 shown in FIG. 2 has a structure in which the sustain discharge electrodes are divided into four blocks, and X electrodes X _{1 to} X ₄ and Y electrodes Y _{1 to} Y for performing sustain discharge. _The surface discharge structure includes ₁₀₀₀ and address electrodes A _{1 to} A _M (M is an arbitrary positive integer) for writing data. Incidentally, the 1000 line (Y electrodes Y ₁ to Y ₁₀₀₀₎ is divided into four in the scanning direction (horizontal lines), 250 lines per _{(Y1 -1 ~Y1 -250, Y2 -1} ~Y
2 _-250 , Y3 _{-1 to} Y3 _-250 , Y4 _{-1 to} Y4 _-250 ).

In FIG. 1, the drive circuit of the AC type plasma display panel of this embodiment is an AC to be driven.
-Type plasma display panel 1 and X electrodes X _{1 to} X ₄
Four X-side driver circuits XD1 to XD4 that apply a high-voltage pulse to each block, four Y-side driver circuits YD1 to YD4 that generate a sustain discharge pulse for each block (250 lines), and a Y-side driver circuit and Y side driver ICYIC1~YIC4 that YD1~YD4 based on the erase pulse is applied to the Y electrodes Y ₁ to Y ₁₀₀₀ for each block, the address-side driver ICAIC1~AIC5 for applying a high voltage pulse to the address electrodes a ₁ to a _M and , And a control circuit 3 for controlling the timing by supplying control signals 11 to 14 to each driver circuit and driver IC.

The operation of this embodiment will be described with reference to the voltage waveform chart of each part shown in FIG. Hsync # is a horizontal synchronizing signal, and the figure is a waveform diagram within one horizontal scanning period. First, a writing pulse having a voltage equal to or higher than the discharge start voltage is applied to the first line of the first block, and all the cells of the first line are turned on. Then, the cell for writing data (in this case, the cell to erase lit) applying a selective erase pulse by the address electrodes A ₁ to A _M against. The cells to which the erase pulse has not been applied continue to be lit by the sustain discharge pulse that is applied later due to the residual wall charges. This operation is 250
Go to the line.

Similarly, the second, third, and fourth blocks are also driven, but pulse voltage waveforms whose phases are shifted from each other are applied. As described above, in the present embodiment, the scan side of the AC type plasma display panel 1 is divided into four blocks, the sustain discharge driver is provided for each block, and the pulse voltage waveforms which are out of phase with each other are applied to drive. Therefore, the charging / discharging current at the time of applying the sustaining discharge pulse can be dispersed, and the peak current of charging / discharging due to the panel capacity can be reduced to 1/4 of the conventional case.

[0018]

As described above, according to the present invention,
The sustain discharge electrodes for performing the sustain discharge, that is, the X electrodes and the Y electrodes are divided into P blocks (P is an arbitrary positive integer) in the AC type plasma display panel, and X blocks are provided by the X side driver circuit for each block. Apply a high-voltage pulse to the electrode, Y
Since the side driver circuit applies the sustain discharge pulses to the Y electrodes as pulse voltages whose phases are shifted from each other, the peak current of charging / discharging due to the panel capacitance is
It is possible to provide a driving circuit for an AC type plasma display panel that can be reduced to one-half the number of divided blocks (P) as compared with the related art.

Further, since the distance from the electrode extraction of the AC type plasma display panel to each sustain driver is the same in each block, it is possible to reduce variations in the display quality of the AC type plasma display panel such as up and down.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a drive circuit of an AC type plasma display panel according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an AC type plasma display panel to be driven.

FIG. 3 is a voltage waveform diagram of each part of the drive circuit of the embodiment.

4 is a structural diagram of a conventional surface discharge AC type plasma display panel, FIG. 4 (1) is a sectional structural diagram, FIG.
(2) is an electrode structure drawing.

FIG. 5 is a configuration diagram of a drive circuit of a conventional surface discharge AC type plasma display panel.

FIG. 6 is a voltage waveform diagram of each part of a conventional drive circuit.

[Explanation of symbols]

1 ... AC type plasma display panel 2 ... discharge cell 3 ... control circuit 11 to 14 ... control signal _{X, X 1 ~X 4 ~X P} ... X electrodes _{Y 1 ~Y 1000 ~Y k ~Y N} ... Y electrodes Y1 _{- 1 ~Y1 -250, ..., Y4 -1} ~Y4 -250 ... Y electrodes A ₁ ~A _i ~A _M ... address electrodes XD1~XD4~XDP ... X driver circuit YD1~YD4~YDP ... Y driver circuit YIC1 -YIC4 ... Y side driver IC AIC1-AIC5 ... Address side driver IC Hsync # ... Horizontal synchronizing signal 51 ... Rear glass substrate 52 ... Dielectric layer 53 ... Front glass substrate 55 ... Wall 60 ... AC type plasma display panel 61 ... X side Driver circuit 62 ... Y side driver circuit 63 ... Control circuit 71, 72, 73 ... Control signal

Claims (2)

[Claims] 1. A drive circuit for driving an AC plasma display panel having a surface discharge structure, comprising: an electrode for sustaining discharge; and an address electrode for writing data. The AC plasma display panel is divided into P blocks (P is an arbitrary positive integer) and has P driving means for applying a sustain discharge pulse to the sustain discharge electrodes for each block. A driving circuit for an AC type plasma display panel, wherein the means generate sustaining discharge pulses whose phases are shifted from each other. Wherein X electrodes for performing sustain discharge (X ₁ ~
And X _P) and Y electrodes (Y ₁ ~Y _N), a drive circuit for driving the address electrodes (A ₁ ~A _M) and AC-type plasma display panel of a surface discharge structure with for writing data Te, the X electrodes (X ₁ to X _P) and Y electrodes (Y ₁ to Y _N)
, The P block in the AC type plasma display panel (P is an arbitrary positive integer) is divided into, the X electrodes (X ₁ to X _P) P-number of X driver circuit for applying a high voltage pulse for each block (XD1-XDP)
When the Y electrodes (Y ₁ to Y _N) in the P pieces of applying the sustain pulses for each block Y driver circuit (YD1～Y
DP), and the P X-side driver circuits (XD1 to XDP) and P
An AC type plasma display panel drive circuit, wherein each of the Y-side driver circuits (YD1 to YDP) generates pulse voltages whose phases are shifted from each other.