JP3436645B2 - Driving method of plasma display panel and display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving method and a display device for a plasma display panel using discharge, and more particularly to a sustain pulse applying driving method and a display device for realizing high brightness and high luminous efficiency.

[0002]

2. Description of the Related Art Plasma display panels are roughly classified into AC type and DC type. The AC type plasma display panel is also referred to as an AC type because the electrodes in the discharge cells are covered with a dielectric layer and the discharge charge travels between the dielectric layers on the two electrodes. As a driving method of this AC type plasma display panel, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-160910, first, priming discharge is generated, and then by writing, wall charges are formed on the dielectric layer on the electrodes. Is formed, and then a plurality of sustain pulses are applied, thereby utilizing the memory effect of wall charges to discharge the sustain pulses for a plurality of times to perform light emission display. This sustain pulse is in the form of a pulse that is alternately applied to the two electrodes.

On the other hand, in the DC type plasma display panel, the electrodes in the discharge cells are exposed and the discharge charges flow to the external circuit through the electrodes, and are therefore called DC type. As a driving method of this DC type panel, for example, "Journal of Television Society", Vol. 38, N
o. 9 (1984) pp. 46-52 Murakami et al., "Color television display by 8 type pulse memory-type discharge panel", the seed pulse discharge is generated by the scanning pulse and the writing pulse, and the space in the discharge cell is generated. Electric charges are formed, and then continuous sustain pulses are applied to discharge a plurality of sustain pulses by a memory effect (pulse memory) due to space charges, so that a high-luminance light emitting display is obtained. This sustain pulse is applied to only one electrode, the anode or the cathode.

[0004]

SUMMARY OF THE INVENTION In the conventional plasma display panel driving method and display device described above,
Regardless of AC type and DC type, there are problems that the luminous efficiency is low and the display brightness is not sufficiently obtained. For example, a conventional AC type plasma display panel has a luminous efficiency of about 1 lm / W and a display brightness of 300 c.
It is about d / m2. Moreover, the conventional DC type plasma display panel has a luminous efficiency of 1 lm / W or less and a display brightness of about 150 cd / m ² . However, in order to use the plasma display panel for TV display,
Brightness (500 cd / m ² ) similar to that of current CRTs is required.

In order to increase the display brightness, it is sufficient to increase the number of sustain pulses, but since the luminous efficiency is low,
The heat generated by the panel increases, which in turn may cause damage. In addition, the power consumption of the display device also increases.

In the above-mentioned conventional AC and DC type plasma display panel driving methods, light emission display is performed by sustain pulses. This is because although different memory systems are used, both discharges are performed once with one sustain pulse, and the discharge phenomenon itself is the same regardless of whether it is an AC type or a DC type.

An object of the present invention is to provide a driving method of a plasma display panel and a display device in which the luminous efficiency is drastically improved by utilizing a new discharge phenomenon, and high brightness can be obtained with low power consumption. Especially.

[0008]

In order to achieve the above object, a driving method of a plasma display panel according to the present invention comprises a first electrode group and at least a second electrode group, and at least the first electrode group. A method of driving a plasma display panel, wherein a pulse voltage is applied to the first electrode and discharge of the pulse voltage is controlled to perform light emission display, wherein at least one pulse voltage is applied to the first electrode. , A pulse train of pulses having a pulse width narrower than the pulse voltage or an AC waveform voltage is applied to the second electrode.

Further, in the driving method of the plasma display panel according to the present invention, the pulse voltage is a pulse voltage applied to the first electrode and the second electrode alternately, and the pulse voltage is applied to the first electrode and the second electrode. The pulse train or the AC waveform voltage is applied to the other to which the pulse voltage is not applied, while the at least one pulse voltage is being applied to one.

Further, in the driving method of the plasma display panel according to the present invention, the pulse voltage applied to the first electrode is an alternating waveform voltage of positive polarity and negative polarity, and the pulse application of both positive polarity and negative polarity is applied. The pulse train or the AC waveform voltage is applied to the second electrode within the time.

Further, in the plasma display panel driving method according to the present invention, the first electrode or the second electrode to which the pulse train or the alternating waveform voltage is applied is an electrode corresponding to a cathode electrode in a discharge form. .

Furthermore, the driving method of the plasma display panel according to the present invention comprises the first electrode or the second electrode.
Delay time from the start of the application of the pulse voltage to the electrode of the second electrode to the start of the application of the pulse train or the AC waveform voltage to the second electrode or the first electrode until the discharge by the application of the pulse voltage is completed. Shorter than the time.

Furthermore, in the driving method of the plasma display panel according to the present invention, the application delay time of the pulse train or the AC waveform voltage is set to 1 μsec or less.

Furthermore, the driving method of the plasma display panel according to the present invention comprises the first electrode or the second electrode.
The pulse train having a narrow pulse width applied to the electrode of or the half of the period of the AC waveform voltage is shorter than the time for the ions of the enclosed gas to reach between the first and second electrodes.

Furthermore, in the driving method of the plasma display panel according to the present invention, the half of the period of the pulse train or the AC waveform voltage is 0.5 μsec or less.

To achieve the above object, a display device of a plasma display panel according to the present invention comprises a plasma display panel having a first electrode group and at least a second electrode group, and a pulse to at least the first electrode. A display device of a plasma display, comprising: a means for applying a voltage and a means for controlling discharge of the pulse voltage, wherein during the period in which at least one pulse voltage is applied to the first electrode, The second electrode was provided with a means for applying a pulse train having a pulse width narrower than the pulse voltage or an AC waveform voltage.

Further, in the display device of the plasma display panel according to the present invention, means for setting the pulse voltage as a pulse voltage applied alternately to the first and second electrodes and the first and second means.
The pulse train or the AC waveform voltage is applied to the other of the first and second electrodes to which the pulse voltage is not applied, while the at least one pulse voltage is applied to one of the second electrodes. And means for doing so.

Further, in the display device of the plasma display panel according to the present invention, means for applying the pulse voltage to the first electrode, means for making the pulse voltage a positive and negative alternating waveform voltage, and the positive electrode And a means for applying the pulse train or the AC waveform voltage to the second electrode within both pulse application times of negative polarity and negative polarity.

Furthermore, in the display device of the plasma display panel according to the present invention, the first electrode or the second electrode to which the pulse train or the AC waveform voltage is applied corresponds to a cathode electrode in a discharge form. A means for generating a pulse having a polarity to be provided is provided.

Furthermore, the display device of the plasma display panel according to the present invention comprises the first electrode or the second electrode.
Delay time from the start of the application of the pulse voltage to the electrode of the second electrode to the start of the application of the pulse train or the AC waveform voltage to the second electrode or the first electrode until the discharge by the application of the pulse voltage is completed. A means to shorten the time is provided.

Furthermore, the display device of the plasma display panel according to the present invention is provided with means for setting the application delay time of the pulse train or the AC waveform voltage to 1 μsec or less.

Furthermore, the display device of the plasma display panel according to the present invention comprises the first electrode or the second electrode.
Means are provided for making the time of 1/2 of the period of the pulse train or the AC waveform voltage applied to the electrode of the electrode shorter than the time for the ions of the enclosed gas to reach between the first and second electrodes.

Furthermore, the display device of the plasma display panel according to the present invention is provided with means for setting the time of 1/2 of the period of the pulse train or the AC waveform voltage to 0.5 μsec or less.

[0024]

[0025]

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the principle of discharge in the present invention will be described with reference to FIG. 2A and 2B show the distribution of the space in the discharge cell and the distribution of the electric field and the potential gradient. FIG. 2A shows the conventional discharge form, and FIG. 2B shows the discharge form according to the present invention. Are shown respectively.

In FIG. 2A, in the conventional discharge mode, when a voltage is applied to the cathode and the anode, a discharge is generated between these electrodes and a steady state is reached. At that time, a cathode layer, a negative glow, a farade, a positive column and an anode glow are formed from the cathode portion. The energy E of the space at this time is concentrated on the portion from the cathode having the largest inclination of the electric field V to the negative glow. This is called cathode voltage drop. On the other hand, the part that contributes to the light emission is the negative glow part and the positive column part where ions and electrons are accelerated and the kinetic energy is sufficiently increased.

In FIG. 2 (b), in the discharge mode of the present invention, the spatial distribution when a constant voltage is applied to the anode and the cathode is oscillated at a high frequency, and the distribution of the electric field V and the potential gradient are shown. Is shown. When the potential of the cathode is vibrated at a high frequency, the ions and electrons near the cathode vibrate at a high frequency. In this case, the energy (temperature) of ions and electrons rises, the probability of ionization due to discharge increases, and the density of ions and electrons near the cathode increases. Therefore, the effect of space charge near the cathode is substantially increased, and the region from the cathode to the negative glow is narrowed. This widens the negative glow region and the positive column region.

From the above, in the present invention, by applying a high-frequency voltage to the cathode, the probability of ionization in the discharge cell is increased, the amount of ions and electrons produced is increased, and Xe atoms that contribute to light emission. Since the probability of excitation can be increased, the emission brightness becomes extremely high, and the area of the cathode voltage drop can be reduced to increase the areas of the negative glow and positive columns, resulting in a dramatic increase in light emission efficiency.

According to the present invention, the effect is enhanced by vibrating the potential of the cathode at a high frequency.
This is because the cathode vibrates at a high frequency voltage, and thus ions and electrons near the cathode can be vibrated directly. On the contrary, when the potential of the anode is vibrated at a high frequency, it is shielded by the space charge of the negative glow or positive column, and the ions and electrons near the cathode cannot be sufficiently vibrated at a high frequency.

Next, an embodiment of the present invention will be described with reference to the drawings, but in the following description, it is applied to a display device using an AC type plasma display panel.

FIG. 3 is a wiring diagram of electrodes in this AC type plasma display panel, where X is an X electrode, Y1 and Y.
2, Y3, Y4, ..., Yn are Y electrodes, A1, A2, A
3, A4, A5, A6, ... Are address electrodes (hereinafter referred to as A
(Collectively referred to as electrodes). FIG. 1 is a diagram showing an embodiment of a driving method of a plasma display panel according to the present invention, showing driving waveforms of respective electrodes in FIG. 3, where X is a driving waveform of an X electrode and Ym is a m-th driving waveform. Y electrode drive waveform,
A is a drive waveform of the address electrode. In addition, FIG.
FIG. 6 is a diagram for explaining the state of electric charge of each electrode in FIG.

In FIG. 3, in a three-electrode AC type plasma display panel, X electrodes and Y electrodes for display are arranged in parallel and alternately in the plasma display panel 300. The Y electrode also serves as a scanning electrode. The A electrode is an electrode for writing, and in the plasma display panel 300,
The wiring is perpendicular to the X and Y electrodes. Adjacent 1
The respective X electrodes and Y electrodes form a pair, and one discharge cell 301 is formed at the intersection of this pair and the A electrode. For color display, each discharge cell 301 is separately applied to any one of three color phosphors, and the discharge cells 301 coated with different color phosphors are arranged alternately. One pixel is composed of three discharge cells of phosphors of different colors arranged side by side. One end of each of the X electrodes is commonly connected inside or outside the panel 300 depending on the driving mode.

In the plasma display panel 300 having such a configuration, a pulse voltage (hereinafter referred to as a pulse voltage X) indicated by reference numeral X in FIG. 1 is applied to all X electrodes, and Y electrodes Y1, Y2, ... .. are independently applied with scanning pulses, but in FIG. 1, the scanning pulse applied to the m-th Y electrode is shown as scanning pulse Ym. Further, a pulse for writing is applied to the address electrodes A1, A2, ... In synchronization with the scanning of the Y electrode. In FIG. 1, this pulse for writing is shown as a pulse A.

Next, each period I to the drive waveform shown in FIG.
The operation of VIII will be described with reference to FIG. 4 showing the state of electric charge at each electrode.

First, in the period I, the pulse voltage X applied to the X electrode becomes a high voltage 102 of 300 V or more, and by applying the high voltage 102 to the X electrode,
Discharge starts. Since the space charge is small in the period before this period I, such a high voltage is required to generate the discharge. The state of electric charge at the end of this discharge is shown in FIG. Since a positive voltage is applied to the X electrode, electrons adhere to the wall of the X electrode and ions adhere to the wall of the Y electrode and the A electrode. Such discharge is called full writing.

In the next period II, the pulse voltage X applied to the X electrode becomes the thin pulse 103 of 0 V, and the voltage pulse 104 sufficient to cause the discharge is applied to the Y electrode. In this period II, a short-time discharge is generated between the X electrode and the Y electrode, and a bias is applied to the X electrode before it forms a charge on the wall of each electrode. Float in the space of the discharge cell 300. This is called thin line erasing,
The state at this time is as shown in FIG.

Next, in the period III, a bias 105 having a constant voltage is applied to the X electrode, and the voltage 106 applied to the Y electrode drops to 0V with a gentle time constant. Here, excess space charges are erased, and electrons are attached to the Y electrode and ions are attached to the A electrode. The state is shown in FIG.

Next, in the period IV, the X electrode is in the state in which the bias 105 is applied, and the write pulse 1 is applied to the Y electrode.
07 is applied. This means that the Y electrodes are Y1, Y2,
.. (that is, every one line) is applied with a scanning pulse to select a line. At the same time, in the A electrode, the pulse 108 matches the scanning pulse of the Y electrode in accordance with the data. Written in time. then,
The ions of the A electrode move to the Y electrode, and the ions are attached to the Y electrode as shown in (IV) of FIG.

Next, after the period V, the sustain pulse is applied to display. First, the pulse voltage 101 is applied to the Y electrode during the period V, and the pulse train 100 having a narrow pulse width is applied to the X electrode at a time slightly delayed from that. Here, a positive pulse voltage 101 is applied to the Y electrode.
Pulse train 100 applied to the X electrode.
Is lower than the pulse voltage 101 applied to the Y electrode, so that the X electrode becomes the cathode in the discharge mode. As a result, as shown in FIG. 4 (V), the ions and electrons between the X electrode and the Y electrode vibrate at high frequency, and the display brightness and the luminous efficiency are increased.

Next, in the period VI, the pulse voltage 1 is applied to the Y electrode.
Since 01 is still applied and the voltage applied to the X electrode becomes 0 V, the ions and electrons in the space are attracted to these electrodes respectively, and as shown in FIG. 4 (VI), the ions are applied to the X electrode. However, electron wall charges are respectively formed on the Y electrodes. As a result, the AC type plasma display panel 3
It is possible to give a memory effect by the wall charges of 00.

Next, in the period VII, contrary to the period VI, the pulse voltage 101 is applied to the X electrode, and the pulse train 100 composed of a pulse having a narrow pulse width is applied to the Y electrode.
Then, due to the memory effect of the wall charges formed in the period VI, a discharge opposite to the state in the period V occurs in this period VII. At this time, the Y electrode to which the pulse train 100 is applied acts as a cathode in a discharged state. Also in this case,
Similar to the period V, discharge with high luminance and high luminous efficiency can be obtained.
The states of ions and electrons at this time are shown in FIG.

Next, in the period VIII, a voltage of 0 V is applied to the Y electrode while the pulse voltage 101 is applied to the X electrode. Space charges discharged during the period VII are formed by electrons on the X electrode and ion wall charges on the Y electrode (see FIG. 4 (VI
I)), and discharge light emission is repeated by the subsequent application of the alternating pulse voltage 101 of the X electrode and the Y electrode.

As described above, in the display period (after the period V) of FIG. 1, the pulse voltage 1 is applied to one of the X and Y electrodes.
When 01 is applied, the pulse train 100 having a narrow pulse width is applied to the other electrode, so that the plasma display panel 300 can obtain high brightness and luminous efficiency.

FIG. 5 is a pulse train (hereinafter referred to as a high frequency pulse train) composed of a pulse voltage 101 applied to the X electrode and a pulse with a narrow pulse width applied to the Y electrode in FIG.
FIG. 6 is a diagram showing a timing relationship with 100.

In the figure, the application start timing of the high frequency pulse train 100 applied to the Y electrode is now delayed by the time td from the rising edge of the pulse voltage 101 applied to the X electrode, and this high frequency pulse train 100.
The time (pulse width) that is 1/2 of the cycle is defined as tw.

In the discharge of the AC type plasma display panel, the discharge is started with a certain time delay after the pulse is applied, and by this discharge, charges having a polarity opposite to that of the applied voltage are formed as wall charges on the electrodes. The electric field stops the discharge. Therefore, the discharge has a certain time from the application of the pulse to the end of the discharge.

In this embodiment, the high frequency pulse train 100 is applied before the discharge by this pulse is completed, and the charges in the space are oscillated at high frequency before the wall charges are formed on the electrodes.

For example, when the distance between the electrodes is 100 μm and the enclosed gas is a Ne-Xe mixed gas of 300 Torr,
The discharge delay time is about 0.5 μsec, and the discharge duration time is about 0.5 μsec. Therefore, in order to apply the high frequency pulse train 100 before the wall charges are formed by the discharge, the delay time td may be set within 1 μsec.

On the other hand, if the pulse width (time of half the pulse period) tw of the high-frequency pulse train 100 is shorter than the time during which the ions of the enclosed gas move between the electrodes, the space charge is more effectively oscillated at high frequencies. You can Discharge cell 3
In the case of a plasma display panel in which the size of 01 is small and the gas pressure is high, the diffusion or drift times of ions and electrons have different values, and so-called ambipolar diffusion does not hold. As a result of the numerical calculation, the drift time of electrons is about 0.01 μsec at the distance between the electrodes (100 μm), and the drift time of Ne ions is about 0.1 μsec. In the case of a large plasma display panel of about 40 inches, the size of the discharge cell becomes slightly larger, so it is appropriate to consider the drift time of Ne ions to be within approximately 0.5 μsec. Therefore, it is desirable to set the time (tw) of 1/2 of the pulse period of the high frequency pulse train 100 to within 0.5 μsec.

FIG. 6 is a waveform diagram showing another specific example of the high frequency pulse train 100 used after the period V in FIG. In this specific example, the high-frequency pulse train 100 has an AC voltage waveform. Also in this case, the same effect as in the case where the pulse has a narrow pulse width is obtained. In addition, although the case where the voltage is applied to the Y electrode is shown here,
The same applies when applied to the X electrode.

FIG. 7 is a waveform diagram showing still another specific example of the high-frequency pulse train 100 used after the period V in FIG.
In this specific example, the high-frequency pulse train 100 has an AC voltage waveform that is gradually attenuated, and the same effects as in the above specific examples can be obtained.

FIG. 8 is a waveform diagram showing another specific example of the pulse voltage 101 used after the period V in FIG. The sustain pulse of the AC type plasma display panel is generally applied alternately to the X electrode and the Y electrode, but as shown in FIG.
The positive pulse voltage 101 and the negative pulse voltage 800 may be alternately applied. In this case, as shown by the waveform applied to the Y electrode, the high frequency pulse train 100 is applied in synchronization with the positive pulse voltage 101 and the negative pulse voltage 800 of the X electrode.

FIG. 9 is a diagram showing a specific example when the present invention is applied to the sustain pulse of the DC type plasma display panel. In driving a DC type plasma display panel, a continuous sustain pulse 101 is applied to the anode, and a high frequency pulse train 10 is applied to the cathode during the sustain pulse 101 application period.
0 is applied.

FIG. 10 is a circuit diagram showing a specific example of means for generating the high frequency pulse train 100 of the AC voltage waveform shown in FIG. 6, in which Q1 to Q4 are FET elements, D1 to D4 are diodes, and L is an inductance. Element, Cp is capacity 10
02 is a power supply.

FIG. 11 is a diagram showing the on / off state of each switch element.

In FIG. 10, the sources of the FET elements Q1 and Q2 are both connected to a power source (negative power source) 1002. The diodes D1 and D2 make the switch element a unidirectional current circuit and the inductance element L. Capacity C
It is connected to the Y electrode forming p. Further, in the period in which the high frequency AC waveform is not applied, a bidirectional current switch circuit by a parallel connection circuit of a circuit composed of the FET element Q3 and the diode D3 and a circuit composed of the FET element Q4 and the diode D4. Hold it at 0V.
The circuit 1001 is a circuit for applying another pulse to the Y electrode.

Next, the operation of this concrete example will be described for each FET element Q.
This will be described with reference to FIG. 11, which shows the ON and OFF states of 1 to Q4.

First, in the period I, the FET elements Q3 and Q4 are turned on, and the voltage of the capacitor Cp (Y electrode) is set to 0V. next,
During the period II, the FET element Q2 is turned on (FET elements Q3, Q4
Is turned off), a current flows from the Y electrode to the power supply 1002 through the inductance element L, and the potential of the capacitance Cp decreases to −2Vs due to the resonance phenomenon. When the potential of the capacitance Cp drops to −2 Vs and the period III is reached,
The FET element Q1 turns on. At that time, due to the resonance phenomenon, the potential of the capacitor Cp sinusoidally rises to 2 Vs.
When the potential of the capacitor Cp rises to 2 Vs, FE is applied in the period IV.
The T element Q2 is turned on, and the potential of the capacitor Cp drops to −2Vs again. Such operation is performed during the period V, VI, VII.
The FET elements Q3 and Q4 are turned on in the period VIII to hold 0V.

The above operation is for generating the high frequency pulse train 100 of the AC voltage waveform, but the generating circuit of the high frequency pulse train 100 by the pulse shown in FIG. 1 can be easily realized by the conventional push-pull circuit.

FIG. 12 is a block diagram showing an embodiment of the plasma display device according to the present invention.
00 is a plasma display panel, 1200 is a control signal generation circuit, 1201 is a display data signal generation circuit, 1202 is a Y electrode high frequency pulse train generation circuit, 120
3 is a Y electrode power recovery circuit, 1204 is an X electrode high frequency pulse generation circuit, 1205 is an X electrode power recovery circuit, 1206.
Is a shift register, 1207 is an address (A) driver circuit, 1208 is a shift register, 1209 is an A driver circuit, and 1210 is a scan driver.

In the figure, the plasma display panel 300 has three electrodes (X electrode, Y electrode) as described above.
Electrode, A electrode) structure is AC type, and each electrode is driven by a high voltage pulse.

The X electrodes are commonly connected as described in FIG. 3, and are directly connected to the X electrode power recovery circuit 1205 and the X electrode high frequency pulse train generation circuit 1204. The X electrode power recovery circuit 1205 generates a full write pulse, a thin line erase pulse and a sustain pulse, and the X electrode high frequency pulse train generation circuit 1204 generates a high frequency pulse train 100. The X electrode power recovery circuit 1205 and the X electrode high frequency pulse train generation circuit 1204 are controlled by the control signal generation circuit 1200.

The Y electrodes Y1 to Yn are independently connected to the scan driver circuit 1210, and the scan driver circuit 1210 sequentially generates scan pulses to these Y electrodes. In addition, this scan driver circuit 121
0 is connected to a Y electrode power recovery circuit 1203 and a Y electrode high frequency pulse train generation circuit 1202, by which a sustain pulse and a high frequency pulse train are applied commonly to each Y electrode. The Y electrode power recovery circuit 1203 and the Y electrode high frequency pulse train generation circuit 1202 are also controlled by the control signal generation circuit 1200.

Every other A electrode is an A driver circuit 120.
7, and every other A electrode is the A driver circuit 1
209 are respectively connected. A writing pulse is applied to these A electrodes in synchronization with the scanning pulse applied to the Y electrodes in accordance with an image signal. A write signal corresponding to the image signal is generated by the display data signal generating circuit 1201, converted into serial / parallel by the upper and lower shift registers 1206 and 1208 of the plasma display panel 300, and then supplied to the A driver circuits 1207 and 1209. To be done.

FIG. 13 is a diagram showing a system configuration when the plasma display device according to the present invention is used as a television display device, wherein 1301 is an antenna, 1302 is a tuner, and 1303 is a television display device.

In the figure, a television display device 1303 is constituted by the plasma display display device according to the present invention. A broadcast radio wave signal is received by an antenna 1301 and selected by a tuner 1302, and then a video signal and an audio signal are sent to a television display device 1303 which is a plasma display display device. In this plasma display device, as described above, the high frequency pulse train 100 is generated to perform television display with high brightness and high luminous efficiency.

FIG. 14 is a diagram showing a system configuration when the plasma display device according to the present invention is used as a data monitor device, and 1401 is a personal computer and 1402 is a data monitor.

In the same figure, an image data signal is output from a personal computer 1401, and a data monitor 140 constituted by the plasma display display device according to the present invention described above.
2 is supplied. The data monitor 1402 receives the image data signal and displays data images such as characters and graphs. In the plasma display display device that constitutes the data monitor 1402, as described above, by generating the high-frequency pulse train 100 and performing display with high luminous efficiency, it is possible to display with desired brightness with low power consumption.

FIG. 15 is a diagram showing a system configuration when the plasma display device according to the present invention is used as a television monitor device, and 1501 is a video camera and 150 is a video camera.
2 is a television monitor.

In the figure, a video signal is output from a video camera 1501 and a television monitor 1502 constituted by the above plasma display device according to the present invention.
Is supplied to. The television monitor 1502 receives the video signal and displays the image captured by the video camera 1501. In the plasma display display device that constitutes the television monitor 1502, as described above, by generating the high-frequency pulse train 100 and performing display with high luminous efficiency, it is possible to display a high-luminance image with low power consumption.

FIG. 16 is a diagram showing an example of a system configuration when the plasma display device according to the present invention is used as an image display device used in a public place. 1601 is an image processing device and 1602 is an image display device. is there.

In the figure, the image information obtained by processing by the image processing device 1601 is supplied to the image display device 1602, and an image is displayed. The image display device 1602 is composed of a plasma display device according to the present invention, and these image processing device 1601 and image display device 160 are included.
2 is often used outdoors for display in a public place, but in the plasma display device forming the image display device 1602, as described above, the high frequency pulse train 100 is used.
Is generated to display with high luminous efficiency, it is possible to display a high-luminance image with low power consumption.

[0074]

As described above, according to the present invention,
In a plasma display driving method and a display device that emits light by applying a pulse voltage, a new discharge phenomenon of high brightness and high light emission efficiency is achieved by applying a high frequency pulse train to another electrode during the period of applying the pulse. Can be realized, and bright display can be performed with low power consumption.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a driving method of a plasma display panel according to the present invention.

FIG. 2 is a diagram showing a discharge phenomenon by a conventional driving method of a plasma display panel and a discharge phenomenon by a driving method of the present invention.

FIG. 3 is a diagram showing wiring of electrodes in a plasma display panel.

FIG. 4 is a diagram showing a state of charges between electrodes of a plasma display panel for the driving method shown in FIG.

5 is a diagram for explaining the application timing of the high-frequency pulse train in FIG.

FIG. 6 is a waveform diagram showing another specific example of the high-frequency pulse train in FIG.

FIG. 7 is a waveform diagram showing still another specific example of the high-frequency pulse train in FIG.

8 is a diagram showing another specific example of the applied pulse after the period V in FIG.

FIG. 9 is a diagram showing a specific example of drive waveforms when the present invention is applied to a DC plasma display panel.

10 is a circuit diagram showing a specific example of the high-frequency pulse train generating means shown in FIG.

11 is a diagram showing a high-frequency AC waveform generating operation of the specific example shown in FIG.

FIG. 12 is a block diagram showing an embodiment of a display device of a plasma display panel according to the present invention.

FIG. 13 is a diagram showing an application example of a display device of a plasma display panel according to the present invention.

FIG. 14 is a diagram showing another application example of the display device of the plasma display panel according to the present invention.

FIG. 15 is a diagram showing still another application example of the display device of the plasma display panel according to the present invention.

FIG. 16 is a diagram showing still another application example of the display device of the plasma display panel according to the present invention.

[Explanation of symbols]

100 high frequency pulse train 101 Applied pulse 300 plasma display panel 301 discharge cell 1202 Y electrode high frequency pulse train generation circuit 1203 Y electrode power recovery circuit 1204 X electrode high frequency pulse train generation circuit 1205 X electrode power recovery circuit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G09G 3/28 K (72) Inventor Shoji Ishigaki 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi, Ltd. Home Appliances / Information Media Business (56) References JP-A 4-218093 (JP, A) JP-A 64-61794 (JP, A) JP-A 56-104389 (JP, A) JP-A 47-24763 (JP, A) JP-A-2-297836 (JP, A) JP-A-9-160522 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G09G 3/28 G09G 3/20 611 G09G 3 / 20 642 G09G 3/288

Claims (16)

(57) [Claims] 1. A first and a first arranged in parallel with each other and alternately.
The second electrode and the first and second electrodes are arranged perpendicularly to each other.
A third electrode, and driving the second electrode and the third electrode.
After deciding the cell to be electrically discharged, the first, second
By driving the electrodes by discharging the cell, a method of driving a plasma display panel which performs a light emitting display, first, driving of the second electrode, at least one pulse voltage to the first electrode wherein within the period is being applied, by being configured to apply a short alternating waveform voltage periodicity than the pulse train or the pulse voltage consisting of pulses with a small pulse width than the pulse voltage to the second electrode Driving method for plasma display panel. 2. At least a first electrode and a second electrode
And alternately applying a pulse voltage to the first and second electrodes
To discharge the cell and display a plasma display.
A Reipaneru driving method, the first, in a period in which applying at least one of said pulse voltage to one of the second electrodes, the first of the pulse voltage is not applied, the second electrode To the other of the pulse voltage
Is a pulse train consisting of pulses with a narrow pulse width or the pulse train
A method of driving a plasma display panel, which comprises applying an AC waveform voltage having a cycle shorter than a loose voltage . 3. The pulse voltage applied to the first electrode is an alternating waveform voltage of positive polarity and negative polarity according to claim 1, and the pulse train or the alternating waveform voltage applied to the second electrode is A method for driving a plasma display panel, wherein the positive polarity and the negative polarity are applied within a pulse application time. 4. The method according to claim 1, wherein the first electrode or the second electrode to which the pulse train or the AC waveform voltage is applied is an electrode corresponding to a cathode electrode in a discharge form. Driving method for plasma display panel. 5. The pulse train to the second electrode or the first electrode from the start of application of the pulse voltage to the first electrode or the second electrode according to claim 1, 2, or 3, the AC delay time of the application until the start of the waveform voltage, the plasma display panel driving method which is characterized in that less than the pulse voltage time <br/> until the end of the discharge due to the application of. 6. The method for driving a plasma display panel according to claim 5, wherein an application delay time of the pulse train or the AC waveform voltage is 1 μsec or less. 7. The time of 1 pulse width of the pulse train applied to the first electrode or the second electrode or 1/2 time of the cycle of the AC waveform voltage according to claim 1, 2, or 3. However, the plasma display panel driving method is characterized in that it is shorter than the time for the ions of the enclosed gas to reach between the first and second electrodes. 8. The method of driving a plasma display panel according to claim 7, wherein a time of one pulse width of the pulse train or a half of a period of the AC waveform voltage is 0.5 μsec or less. . 9. A first and a first arranged in parallel with each other and alternately.
The second electrode and the first and second electrodes are arranged perpendicularly to each other.
A plasma display panel having a third electrode ;
Driving the first, second, and third electrodes to discharge the cell,
Plasma display having driving means for performing light emission display
In a lay panel display device , the driving means drives the second electrode and the third electrode.
At least 1 on the first electrode after determining the discharge cell by
One in the selected time period is being applied pulse voltage, so as to apply a short alternating waveform voltage periodicity than the pulse train or the pulse voltage made of the second narrow pulse pulse width than the pulse voltage of the electrode display device of a plasma display panel, characterized in that the. 10. At least a first electrode and a second electrode
And alternately applying a pulse voltage to the first and second electrodes
To discharge the cell and perform plasma display for light emission display.
A display device of the play panel, said first, within one period is being applied to at least one of the pulse voltage of the second electrode, the pulse voltage is not applied the first, the second From the pulse voltage to the other electrode
Is a pulse train consisting of pulses with a narrow pulse width or the pulse train
A plasma display panel display device, wherein the benzalkonium be applied to short alternating waveform voltage periodicity than pulse voltage. 11. The method of claim 9, the pulse voltage and means for the positive and negative alternating waveform voltage, in the positive polarity and negative polarity both pulse applying time of the second electrode And a means for applying the pulse train or the AC waveform voltage. 12. The pulse according to claim 9, wherein the pulse train or the pulse having the alternating waveform voltage is applied to the first electrode or the second electrode as an electrode corresponding to a cathode electrode in a discharge form. A display device of a plasma display panel, characterized in that it has a means for generating. 13. The pulse train according to claim 9, 10 or 11, from the start of application of the pulse voltage to the first electrode or the second electrode to the pulse train to the second electrode or the first electrode. the AC delay time until start of application of the waveform voltage, a display device of a plasma display panel, characterized in that it comprises means for shorter than the time of application by up <br/> completion of discharge of the pulse voltage. 14. The display device of the plasma display panel according to claim 13, further comprising means for setting an application delay time of the pulse train or the AC waveform voltage to 1 μsec or less. 15. The time period of one pulse width of the pulse train applied to the first electrode or the second electrode or half the period of the AC waveform voltage according to claim 9, 10, or 11. And a means for making the time between the first and second electrodes shorter than the arrival time of the ions of the enclosed gas. 16. The plasma display panel according to claim 15, further comprising means for setting a time of one pulse width of the pulse train or a time half of a cycle of the AC waveform voltage to 0.5 μsec or less. Display device.