JP2621832C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for driving a three-electrode type AC gas discharge panel, and relates to a new high-speed display address drive enabling large-size display and color display. Is the way. 2. Description of the Related Art The inventors of the present invention have already disclosed techniques related to the present invention in Japanese Patent Laid-Open Nos. 55-113237 and 57-787.
51, JP-A-60-220393, JP-A-61-144694 and JP-A-62-22352. FIG. 6 shows an example of a three-electrode type AC gas discharge panel to which the present invention is applied. A conventional driving method of the panel is shown in FIG. 4 "Conventional erasing address method" and a pattern displayed as a result. Is shown in FIG. The gas discharge panel shown in FIG. 6 is a surface discharge panel disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 62-22352, in which an electrode pair X having display electrode portions arranged in parallel on one substrate 1 is shown. , Y
After the electrodes are covered with the dielectric layer 4, the electrode pairs X and Y are placed on the slope of the separator 5.
A selection electrode W arranged in a direction intersecting in the vicinity of the display electrode portion insulated from the display electrode portion. A set of three electrodes, which constitutes a display cell between them, is arranged in a matrix, and the other substrate 7 provided with the spacers 6 is hermetically sealed on the substrate 1 to fill a discharge gas. The display discharge is performed on the display electrode surface on the same substrate 1. A conventional driving method used for the panel will be described with reference to an electrode diagram of 4 × 4 cells shown in FIG. 5 and a waveform diagram for driving the panel shown in FIG. The symbols X, Y, and W in FIG. 5 correspond to the symbols in FIG. 6 except that arithmetic numerals indicating the positions of the electrodes are added as subscripts to the symbols. In FIG. 5, symbols C11 to C44 are symbols representing discharge cells, a circle is a cell which is lit and displayed, and a place without a triangle at a cell position is a non-ignited cell. The vertical axis in FIG. 4 is a panel applied voltage, and the horizontal axis is a time axis. As described above, W written in the left column is a selection electrode, X is one display electrode, Y is the other display electrode, and the subscript indicates the electrode number. P representing the timing is an all-cell activation period, S1 is a holding period in which wall charges are stably expanded, Q is an inversion period in which only the address lines invert the wall charge polarity,
R is an address period by selective erasure, and S2 is an adjustment period for stabilizing the selected wall charge. The pulses of symbols A10 to A40 indicated by hatching falling to the left in the waveform column of the selected electrode are the set selective erasing pulses, and the pulses B10 to B20 of the same timing and the same hatching are applied to the other display electrode. The corresponding selective erase pulse. Pulses PX20 to PX40 hatched to the lower right on one display electrode are one ignition pulse and correspond to the pair of pulses PY20 to PY40 applied to the other display electrode Y at the same timing. Ignite all cells on the pair. The blank time d between the next sustain pulse provided after the selective erase pulse is a wall charge disappearance guarantee time. In the cycle immediately before the erase address time T1 to T2, all the cells on the electrode pair X1 and Y1 are written by a write pulse PX10 (not shown) and a corresponding sustain pulse PY10, and are in an ignition state. In the cells on the electrode pairs X1 and Y1, after sustain discharge is continued in the periods P and S1, a wall charge inversion pulse QX1 is applied to the electrode X1 in the period Q, and only the cells on the electrode pair X1-Y1 are blocked. The charge polarity is inverted positively on the electrode X1 to differentiate it from other display electrode pairs. Then, select erase pulses A10 and A30 and the corresponding select erase pulse on Y1 electrode
With B10, the selected cells W1-Y1 and W3-Y1 once discharge at the beginning of the period R, and then perform an erasing discharge due to recombination of charges near the point where the pulse returns to the zero voltage line in the middle of the period R. And display cells C11 and C13 lose their charge due to neutralization during time d and disappear, and cells C12 and C to which no selection pulse is applied.
Only 14 remains ignited. After that, the wall charges are updated in the period S2 for stabilization. [0008] The operation of the next display electrode pair X2, Y2 is proceeding simultaneously with the operation of the display electrode pair X1, Y1. That is, the all-cell activation pulse PX20 on the X2 electrode and the corresponding activation pulse PY20 on the Y electrode correspond to the electrodes X1, X2 to be displayed.
All cells on the display electrode pair X2, Y2 to be addressed next to Y1 are activated in the period P. As described above, while activating all the cells on the immediately preceding electrode pair whose display address is to be addressed, the previous electrode pair is selectively erased. During that time, the other electrodes are at the maintenance voltage,
That is, it was in the previous display state. Until now, all address cycles of activation, erasure, and maintenance have been repeated every time display information is written to a pair of display electrodes. Therefore, the unit pulse width is set to a series of selective erasure cycle times t described here. It took about 40 microseconds to write one display electrode pair as 4 microseconds. [0010] The display time of 40 microseconds / line is too slow for television display. Moreover, in order to realize a high-definition TV in the future, a PDP having a 1600 × 1000 pixel trio (three primary color pixels) must be driven. To create a pixel trio on two adjacent lines, the 3200 × 2000 electrode P
It is said that the DP must be driven at at least 30 screens per second with 256 gradations. Then, the time available for addressing one display electrode pair is calculated to be 2.08 microseconds or less. An object of the present invention is to realize a high-speed address by shortening a drive time required for a display address in view of the above-described conventional situation. A driving method according to a first aspect of the present invention provides a pair of parallel display electrodes for surface discharge covered with a dielectric layer and a direction intersecting the two display electrodes. constitute a set in one pixel of one of the selected electrodes, the driving method of the three-electrode type AC gas discharge panel comprising constituting the television display screen capable of displaying and arranged in a matrix of pixel, the Configure the display screen
While sequentially scanning one of the display electrode pairs corresponding to all the pixel columns,
By applying a selection pulse between the pole and the selection electrode, the
The operation of sequentially addressing the selected pixels for display pairs corresponding to the electrode pairs, and the alternation maintenance pulse between the electrodes of all display electrode pairs forming all the display-addressed pixel columns.
The pixels on all the display electrode pairs constituting the display screen by applying
This is a driving method in which the display of one screen is performed by adding an operation of maintaining the display simultaneously by surface discharge between the display electrodes forming a pair . According to a second aspect of the present invention, there is provided a driving method for a surface discharge display electrode pair covered with a dielectric layer corresponding to a plurality of display lines necessary for a screen display of a television, and a plurality of pairs in a direction intersecting the display electrode pair. select electrode driving method of the three-electrode type AC gas discharge panel having a front
Maintain one of each display electrode pair that constitutes all display lines for screen display
Scanning without applying a voltage, and the display electrode and the selection electrode of the one
Operations and performing sequential display address lines by applying a pulse for selecting between said image
Simultaneously between each electrode of all display electrode pairs that constitute the display line for surface display
This is a driving method in which a display of one screen is performed by adding an operation of applying an alternating sustain pulse and maintaining the display in common by surface discharge between the pair of display electrodes . It has been found that the presence / absence of wall charges is sufficiently preserved from milliseconds to unit times of seconds unless the externally applied voltage is changed. As shown in FIG. 1, during the display address period R, the display electrode pairs are successively selected without inserting the sustain voltage SP, and a wall charge is present in the cells to be displayed of the plurality of display electrode pairs. The amount (the amount of wall charges that can be re-discharged when a sustain voltage is applied) is defined (stored) collectively. In the subsequent display sustaining period, if the alternating sustaining voltage is simultaneously applied to all the display electrode pairs that are addressed for display, the cell in which the wall charge is accumulated is in an ignition state, and the wall charge accumulation is reduced. A small or absent cell is in a non-firing state and a desired screen display is obtained. Since the sustain voltage is not inserted during the display address period, the display address time can be reduced, and the display address can be made faster. FIG. 1 and FIG. 2 are drive waveform diagrams of two embodiments according to the present invention, and show the erase address drive described above as an example. FIGS. 3A and 3B show display on the panel obtained by driving the embodiments. In FIG. 1 and FIG. 2, the selection electrode W, timings P, S1, Q, R, S2, etc.
One display electrode X, the other display electrode Y, the selective erasing cycle time t, and the times T1 and T2 at both ends are represented by the same symbols as those in FIG. 4 described in the section of the conventional method. Their description is omitted. The pulses A1 to A4 shown in the waveform column of the selection electrode W are selective erasing pulses, and the pulses B1 to B4 on the other display electrode, which correspond to the above pulses in time, are the corresponding selective erasing pulses. The pulses PX1, PY1... PX4, PY4 at the timing P on the display electrode are all-cell activation pulses, and SP is a sustain pulse. m is the delay time of the selective erasing pulse between the most recent electrodes being scanned for the address, in other words, the minimum step of the selective pulse, and d is the guaranteed time of the wall charge disappearance. The pulses QX1,... QX4 at the timing Q shown in FIG. 2 are the charge inversion pulses described above. Only the display cell symbols in FIG. 3 correspond to D in FIG. 1A corresponding to FIG.
b) E is shown in the figure. Embodiment 1 In FIG. 1, a plurality of display electrode pairs at once, in this case, all electrodes X1, Y1 to X4, Y4 are connected at a timing P by a combined electric field of pulses PX1, PY1 to be paired at all the cells of the panel ( After activating 16 cells) and maintaining and stabilizing by sustain discharge a plurality of times at timing S1, only cells not displayed at timing R are erased with the pulses A1 to A4 on the selection electrode and the left on the other display electrode Y. Scanning is performed for all cells without inserting a sustain pulse by using pulses B1 to B4 hatched by falling oblique lines. Immediately after the erase address scan is completed for all lines, no sustain pulse is inserted,
When a rest period of several microseconds is provided as shown in FIG. 1d, a discharge due to wall charges occurs immediately after the pause period, and the decay of the wall charges is promoted by the no-voltage state after the discharge. Since the discharge is attenuated to a wall charge that cannot be sustained, the non-ignition of the display cell is completed. The delay width m of each of the scanning electrode pairs such as the address pulses A 1... A 4, B 1. The scanning is performed as a degree, and only the discharge cells to be displayed for all the activated electrode pairs are left with the charges in the wall charge existing state. In the period S2, a plurality of sustain pulses are inserted for stabilization after the erase address. As shown in FIG. 1, when the selective erasing operation is performed, the display on the panel becomes as shown in FIG. 3A, and six cells D11, D12, D13, D21, D22, and D31 indicated by ○ are displayed. State. This display state is maintained by simultaneously applying the alternating sustain pulse to all the display electrode pairs during the display sustain period. The above method can be applied to a panel having a configuration in which the electrodes X1 to X4 are shared. Embodiment 2 In the panel shown in FIG. 3 (b) where electrodes are commonly connected, electrodes X1 and X2 form one electrode block BX1, and electrodes X3 and X4 are connected to another electrode block BX2.
Is formed. A driving embodiment shown in FIG. 2 can be considered for driving the panel. In the period T1 to Tm of the driving waveform example of FIG. 2, the pair of write pulses PX1, PY1 and PX2, PY2 at the timing P causes the electrode block BX1 shown in FIG.
After all the upper cells E11 to E24 are ignited and charge is regenerated by the sustain pulse SP, the period Q
After the charge reversal pulses QX1 and QX2 are applied to differentiate the wall charges, the period R
, The selective erasing pulses B1, B2 on the Y electrodes Y1, Y2 in the electrode block and the selective erasing pulses A31, A41 from the selected electrodes at the same timing correspond to the cells E14, E23, E2.
4 is activated and erased, and sustain discharge is performed in a period S2. In the next period Tm to T2, the electrode block BX2 is addressed. That is, at timing P ', the pair of write pulses PX3, PY3 and PX4, PY4, etc.
After activating all the cells E31 to E44 on the electrode block BX2 and regenerating the charge with the sustain pulse SP, the charge reversal pulses QX3 and QX4 are added in the period Q ', respectively, and the Y in the electrode block is changed in the period R'. The cells E32, E33, E34 and E41 to E44 are temporarily stored in correspondence with the selective erase pulses B3 and B4 on the electrodes Y3 and Y4 and the selective erase pulses A12, A22, A32 and A42 from the selective electrodes at the same timing. Erase is performed after ignition, and sustain discharge is performed in a period S2 ′ to complete one selective erase cycle. In this embodiment, access is repeated by the number of the electrode blocks 2 to display one screen image. When access is performed as described above, the unit waveform width is 4 microseconds, the number of sustain electrode pairs in one block is N, the time required for one-time selective erase is U, the selective erase cycle time t, Assuming that the sum is S, t = activation time (P + S) + selection erasing time (Q + R) R = (UN) +4 microseconds If S = S1 + S2 is written, the simple average selection erasing cycle time is as follows. In the first embodiment, t = 1.7 microseconds when U = 1 microsecond U = 4 microseconds t = 4.7 microseconds In the case of U = 1 microsecond, t = 1.7 microseconds and the target numerical value t = 2.08 The object of the present invention has been achieved well over 20% in microseconds. According to the present invention, a large surface discharge type gas discharge panel having the required number of display lines for television screen display can be addressed at high speed. In a color display requiring at least three primary color pixels, such a high-speed addressing method is definitely required. For the target value t = 2.08 microseconds, the value t obtained by the present invention
Since 1.7 microseconds is about 20% smaller, the present invention can be realized as an apparatus with a margin. Also, t = 4.7 microseconds obtained in Example 2 is a numerical value that can be sufficiently used as a color TV image apparatus in a small-sized panel. It can be said that ACPDP, which had a difficulty in full-color display with a long service life, can now be driven in a practical manner by establishing this method.

[Brief description of the drawings]     FIG.   FIG. 4 is a driving waveform diagram for explaining the driving method of the present invention.     FIG. 2   FIG. 9 is a driving waveform diagram for explaining another driving method of the present invention.     FIG. 3   FIG. 4 is a diagram for explaining display of a display screen according to the present invention.     FIG. 4   FIG. 9 is a driving waveform diagram for explaining a conventional driving method.     FIG. 5   FIG. 9 is a diagram for explaining display of a display screen according to a conventional example.     FIG. 6   It is a figure showing an example of the three-electrode type AC gas discharge panel which is the object of the present invention.     [Explanation of symbols] W, W1-W4 selection electrode X, Y, X1-X4, Y1-Y4 Display electrode pair SP sustain pulse

Claims (1)

Claims: 1. A pixel is formed by a set of two parallel display electrodes for surface discharge covered with a dielectric layer and one selection electrode in a direction intersecting the display electrodes. A method of driving a three-electrode AC gas discharge panel comprising a plurality of pixels arranged in a matrix to form a display screen capable of television display, the method corresponding to all pixel columns forming the display screen One of the displayed display electrode pairs is sequentially scanned
And applying a selection pulse between the one display electrode and the selection electrode.
Thus, the operation of sequentially performing display addressing on the selected pixels in each of the pixel columns in correspondence with the electrode pairs, and the operation of all the display electrode pairs constituting all the pixel columns that have been display-addressed are performed.
The display screen is constituted by applying an alternating maintenance pulse between these electrodes.
A three-electrode type AC gas discharge characterized in that the display of one screen is performed by adding an operation of simultaneously maintaining the display by the surface discharge between the pair of display electrodes on the pixel columns on all the display electrode pairs. Panel driving method. 2. A plurality of display lines corresponding to a television screen display.
A method for driving a three-electrode AC gas discharge panel having a surface discharge display electrode pair covered with a dielectric layer and a plurality of selection electrodes in a direction crossing the display electrode pair, wherein all the displays for the screen display are provided. Maintain one of the display electrode pairs that make up the line
Scanning is performed sequentially without applying a pulse, and one of the display electrode and the selection electrode is
The operation of applying a selection pulse between the two and performing a line-sequential display address ;
The same is applied between each electrode of all the display electrode pairs that constitute the display line for screen display.
A three-electrode type AC gas discharge panel characterized in that a one-screen display is performed by adding an operation of applying an alternating sustaining pulse at times to perform a common display maintenance by surface discharge between the pair of display electrodes. Drive method.