JPH078579B2 - Gas discharge type optical head - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas discharge type optical head using gas discharge light emission as a light source.

(Prior Art) Conventionally, a plasma display device (PDP) is known as a gas discharge light emitting device.

There are AC type and DC type in PDP, for example, Document I: Electronics
There are various PDPs disclosed in Technology Series No. 4 Display element / device latest technology '85 edition ("Display element / device latest technology '85 edition" edited by editorial committee, Comprehensive Technology Publishing).
Hereinafter, a DC PDP disclosed in Document I will be described as an example of a PDP with reference to the drawings.

FIG. 6 is a cutaway perspective view schematically showing the structure of a conventional DC PDP.

In the figure, 10 is a back substrate, 12, 14 and 16 are ribbon-shaped anodes, DC auxiliary anodes and AC auxiliary anodes provided on the back substrate, and a plurality of anodes 12 and auxiliary anodes 14 are provided on the back substrate 10.
16 and 16 are arranged in parallel, and a partition 18 is provided between adjacent anodes of these anodes 12, 14, 16. Reference numerals 20 and 22 denote a ribbon-shaped cathode and an auxiliary DC cathode, which are spaced apart from the anode and face each other, and the plurality of cathodes 20 and the DC auxiliary cathode 22 are arranged so as to be orthogonal to the anodes 12, 14, and 16, respectively. There is.

A first discharge cell for display is provided in a region where the cathode 20 and the anode 12 face each other, and a second discharge cell that performs a pilot discharge for the first discharge cell is provided in a region where the cathode 20 and the AC auxiliary discharge anode 16 face each other. Further, a third discharge cell for performing a pilot discharge for the second discharge cell is formed in a region where the DC auxiliary discharge cathode 22 and the DC auxiliary discharge anode 14 face each other.

A small hole (priming hole) 24 is provided at a position corresponding to the first discharge cell of the cathode 20, and in order to reduce the statistical discharge delay of the discharge cell, ions and excited atoms generated by the seed discharge etc. Are supplied to the first discharge cell.

Further, in order to stabilize discharge light emission in the discharge cell, the anode 12 is connected to the data signal line via the resistor R _D , the DC auxiliary discharge anode 14 is connected to the power source E _A via the resistor R _A1 , and the AC auxiliary discharge anode. 16 is the power supply E _A through the resistor R _A2 and the DC auxiliary cathode 22 is the resistor R A
Connected to earth potential via _C.

Reference numeral 26 denotes a front substrate, and the front substrate 26 and the rear substrate 10 are sealed by a sealing portion (not shown), and a dischargeable gas, for example, a mixed gas of Ne and Ar is sealed between these substrates.

FIG. 7 is a diagram showing a wiring structure of a conventional DC-PDP, in which a plurality (m) of anodes 12 are designated by reference numerals 121 and 1, respectively.
22 ..., 12m and a plurality (n) of cathodes 20 are shown by reference numerals 201, 202 ,.
The data signals applied to 21, 122, ..., 12m are labeled A ₁ , A ₂ , ..., Am and the cathodes 201, 202 ,.
The scanning signals applied to the reference symbols C ₁ , C ₁ , ..., Cn, respectively.
Indicate.

The anodes 121, 122, ..., 12m are respectively provided with resistors R _D1 , R
_D2, ......, the data signals A ₁ through _{R D m, A 2, ......} , Am is applied.

The white circles in FIG. 7 indicate discharge cells.

FIG. 8 is an explanatory diagram of the scanning signal applied to the cathode, and FIG. 9 is an explanatory diagram of the timing of discharge light emission in the discharge cell,
FIG. 9 shows the scanning signal, for example, the signal waveform of C ₁ , and the data signal, for example, the signal waveform of A ₁ .

As shown in FIG. 8, the scanning signal includes an ON signal for forming light emission of the discharge cell, for example, a voltage signal of 0V, and an OFF signal for extinguishing light emission of the discharge cell, for example, a voltage of the cathode pre-bias voltage V _C pb80V. A pulse signal of one pulse consisting of a signal and a ON state (for example, a state of 0V) for a time T is applied to the cathode 20 as an ON signal of one unit.

Similarly, as shown in FIG. 9, the data signal also comprises an ON signal, for example, a voltage signal of 180V and an OFF signal, for example, a voltage signal of the anode pre-bias voltage _VA pb100V, and is in an ON state for a time T (for example, 180V). A pulse signal of one pulse following the above condition is applied to the anode 12 as an ON signal of one unit.

When displaying characters and figures by the light emission of the discharge cells, one unit of ON signal is the cathode 201, 202, ..., 20n.
Are sequentially applied to the cathodes, so that these cathodes are sequentially turned on (see FIG. 8). Then, the anodes 121, 122, ...
In order to display the discharge cells by selectively emitting light to each of the 12 m, an ON or OFF signal (data signal) is applied at the same timing as the cathode is turned on.
A voltage equal to or higher than the discharge start voltage (for example, 130 V) is applied to the discharge cells to be emitted by applying an ON signal to both the anode and the cathode. For discharge cells that do not want to emit light, a voltage less than the discharge start voltage is applied by applying an off signal to the anode and / or the cathode.

For example, as shown in FIG. 9, in the periods s _{1 to} s ₂ , an ON scan signal is applied to the cathode 201, an OFF scan signal is applied to the cathodes 202 to 20n, and an ON data signal is applied to the anode 121.
Therefore, in this case, discharge light emission is formed in the discharge cell in the intersection region of the cathode 201 and the anode 121, and discharge light emission is not formed in the discharge cell in the intersection region of the cathodes 202 to 20n and the anode 121.

OFF data signal is applied to the period s ₂ ~s ₃ and s ₅ ~s ₆ At the anode 121, thus intersecting also the anode 121 and the cathode 201~20n as on the scanning signal is applied to this case cathode 201~20n No discharge light emission is formed in the discharge cells in the region.

In the period s _{3 to} s ₄ , the OFF scan signal is applied to the cathode 201 and the ON data signal is applied to the anode 121. Therefore, in this case, discharge light emission is not formed in the discharge cells in the intersection region of the cathode 201 and the anode 121. Of the cathodes 202 to 20n, discharge light emission is formed in the discharge cells in the intersection region of the cathode 121 and the anode 121 to which the ON scanning signal is applied.

It can be understood from the above description that an off-data signal may be applied to the anode 121 when it is desired not to emit light from the discharge cells in the intersection region of the anode 121 and the cathodes 201 to 20n. When the on-data signal is applied, crosstalk (erroneous discharge) occurs between the anode 122 and one of the cathodes 201 to 20n facing the anodes 121 and 123 to which the on-scan signal is applied. In order to prevent the occurrence of such crosstalk, the partition wall 18 is provided between adjacent anodes so as to project at a height that can prevent erroneous discharge.

(Problems to be Solved by the Invention) In gas discharge light emission, since a wavelength band suitable for wavelength sensitivity characteristics of various photoconductors can be selected by the composition of the enclosed gas, a gas discharge light emitting device typified by PDP is used. For example, application as an optical head of an electrophotographic printer (optical printer) is also considered. The structure of the gas discharge type optical head will be briefly described below with reference to the drawings.

FIG. 10 is a diagram showing an example of the structure of the gas discharge optical head, focusing on the wiring structure.

In the illustrated gas discharge type optical head, a plurality of anodes (261, 262, ..., 261) are arranged in a line in the main scanning direction on one substrate (not shown), and a plurality of anodes (261, 262) are provided on the other substrate (not shown). Cathode (2811, 2822, ..., 2818, 2821, ..., 2828, ...
, 2811, ..., 2818) are arranged in parallel, one and the other substrate are separated and bonded so that the anode and the cathode are orthogonal to each other, and the discharge gas is sealed between these substrates.

Then, one anode is used as a common electrode for any suitable number (for example, 8) of cathodes, and one anode (for example, 26
1) and any suitable number of cathodes (eg 2811, 2812, ..., 2
818) and one unit of the electrode block.

A plurality of scan electrodes (for example, eight scan electrodes 301, 302, ..., 308) are provided on the other substrate so that cathodes selected from the electrode blocks so as not to overlap are commonly connected. , 2811 are connected in common by the scan electrode 301, and matrix connection by multi-layer wiring is performed.

Data items A ₁ , A ₂ , ..., A ₁ to the anodes 261, 262, ..., 261 via the resistor R, and scan electrodes 301, 302 ,.
Scan signals C ₁ , C ₂ , ..., C ₈ are input to 308, respectively.

Even in the gas discharge type optical head having the above-mentioned configuration, in order to form discharge light emission for optical writing, the data signal and the scanning signal are input in the same manner as in the conventional DC-PDP, and therefore, in order to prevent crosstalk. A partition wall 32 is provided between adjacent anodes.

However, in a display device (display), the pixel density may be about 3 dots / mm, but in the optical head, it is desired to increase the pixel density to about 8 dots / mm to 16 dots / mm. In order to satisfy such a demand for high definition, it is necessary to reduce the distance between adjacent electrodes. The partition wall is formed by, for example, a thick film printing technique, but as described above, the partition wall is formed in a narrow inter-electrode space,
It is extremely difficult to form the electrodes by projecting to a height at which erroneous discharge can be prevented and accurately positioning them. Therefore, the yield is poor and the cost is high. On the other hand, if the partition wall is not formed, crosstalk occurs.

In addition, the light emitting area of discharge light emission formed near the cathode is formed to be wider than the cathode when viewed in a plan view, and therefore when the pixel density is increased, the light emitting area of the adjacent discharge cell is viewed in a plan view. There is a problem that they overlap with each other, and as a result, adjacent light emitting dots are not clearly separated and unclear light emitting dots are formed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas discharge type optical head having a structure capable of preventing the occurrence of crosstalk, separating light emitting dots practically sufficiently, and manufacturing with a high yield, in order to solve the above problems. .

(Means for Solving the Problem) In order to achieve this object, a gas discharge type optical head according to the present invention is provided with a plurality of cathodes and a plurality of cathodes arranged to face each other in order to discharge and emit a discharge gas enclosed between substrates. In a gas discharge type optical head having an anode and having at least one row of discharge cells formed between the cathode and the anode, one anode and a cathode facing the other anode adjacent to the one anode are substantially The floating electrode is provided between adjacent anodes so that erroneous discharge can be prevented, and both the anode and the floating electrode are formed using a light-shielding material. The portion of the anode facing the cathode and the floating electrode Is characterized in that a window for transmitting light is provided in a portion facing the cathode.

(Operation) According to the gas discharge type optical head having the above-described configuration, it is possible to substantially prevent erroneous discharge between one anode and the other cathode adjacent to the one anode and facing the other anode. Place them separately. Therefore, erroneous discharge can be prevented without providing a partition wall between adjacent anodes.

In addition, since the anode and the cathode are arranged apart from each other so as to prevent erroneous discharge in this way, even if the gap between the adjacent anodes is widened so as to generate leakage light that cannot clearly separate the light emitting dots. Since a light-shielding floating electrode having a light-transmitting window is provided between the anodes, it is possible to obtain light-emitting dots that are sufficiently and practically separated by this floating electrode.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the drawings are only schematically shown to the extent that the present invention can be understood, and therefore the dimensions, shapes, arrangement relationships and numerical conditions of each constituent component are not limited to the illustrated examples.

First Embodiment FIGS. 1 (A) and 1 (B) are diagrams for explaining the configuration of the first embodiment, and FIG. 1 (A) is a view mainly showing an anode and a cathode, a floating electrode and an optical head of an optical head of the embodiment. FIG. 4B is a plan view of a main part showing a light emission regulating layer, and FIG. 9B is a perspective view schematically showing a structure of a main part of the optical head of the embodiment. FIG. 2 is a diagram schematically showing the wiring structure of the optical head of the first embodiment.

In addition, in order to help understanding of the drawing in FIG. 1, the hidden line of the scanning electrode is a one-dot chain line, the hidden line of the auxiliary discharge cathode, the auxiliary discharge anode and the anode is a two-dot chain line, and the hidden line of other components is a dotted line, Some hidden lines are omitted. Further, in FIG. 2, the light emitting portion of the discharge cell is schematically shown by a white circle.

As shown in FIGS. 1 (B) and 1 (A), the optical head of this embodiment has a plurality of cathodes 46 arranged in opposition so as to discharge and emit the discharge gas enclosed between the substrates 40 and 44.
And a plurality of anodes 42 and a row of discharge cells formed between the cathodes 46 and the anodes 42, and adjacent anodes 42, 42.
A floating electrode 62 is provided between the anode 42 and one of the anodes 42,
The other anode 42 adjacent to the one anode 42 and the cathode 46 facing the other anode 42 are separated from each other so as to substantially prevent erroneous discharge.

Then, both the anode 42 and the floating electrode 62 are formed by using a light-shielding material, and a portion of the anode 42 facing the cathode 46 and a portion of the floating electrode 62 facing the cathode 46,
A window 43 for transmitting light is provided.

More specifically, in this embodiment, a plurality of anodes 42 (421, 422, ...) Made of a translucent material are provided in a main scanning direction on a front substrate 40 made of a translucent material such as glass. Auxiliary discharge cathodes 52 are provided so as to extend in the arrangement direction of the anodes 42, and one anode 42 is a common anode for a plurality of, for example, eight cathodes 42 of an arbitrary suitable number. Further, a discharge cell for optical writing is formed in a region facing the cathode 46. A floating electrode 62 is provided between the adjacent anodes 42, and the portions of the electrodes 42 and 62 facing the cathode 46 are respectively,
A window 43 is provided. In this embodiment, the window 43 for the cathode 46 facing the anode end is provided with the anode 42 and the floating electrode 62.
Are formed by cutting out both side edge portions of the
The window 43 for the cathode 4618 and the anode 421 as shown in FIG.
Is formed by the notch portion a and the notch portion b of the floating electrode 621.

Data signals A ₁ , A ₂ , ... Are applied to the anodes 421, 422 ,.

Further, a plurality of auxiliary discharge anodes 54 are provided on the front substrate 40 so that one ends of the anodes 54 face the auxiliary discharge cathodes 52 and are arranged at predetermined intervals in the arrangement direction of the anodes 42. By constantly performing an auxiliary discharge between the auxiliary discharge cathode 52 and the auxiliary discharge anode 54, ions, excited atoms, etc. are supplied to the optical writing discharge cell, thereby suppressing the statistical discharge delay of the discharge cell.

Further, as shown in FIGS. 1 (B) and 2, the rear substrate 44
A plurality of cathodes 46 (4611, 4612, ..., 4618, 4621,
, 4628, 4631 ...) are provided, and an arbitrary and suitable number of scan electrodes 48 (481, 41, 4) are provided on one side and the other side of the cathode 42, respectively.
82, ..., 488), and the cathode 42 is alternately extended to one side and the other side to be connected to the corresponding scan electrode 48. The cathode 42 and the scanning electrode 48 are matrix-connected by a multi-layer wiring. For example, as shown in FIG. 2, the scanning electrode 481 and the cathodes 4611 and 4621 are connected to each other, and the scanning electrode 482 and the cathode 461 are connected to each other.
Wiring is done so as to connect to 2,4622.

The scan electrodes 481, 482, ... 488 have scan signals C ₁ ,
C ₂ , ..., C are applied, and thus a scanning signal is applied to the cathode 46 via these scanning electrodes.

As shown in FIG. 1B, a light emission control layer 50 made of a dielectric paste is provided on the rear substrate 44 so as to cover one side and the other side of the cathode 46, and the cathode 46 is partially exposed. ing. The exposed portion of the cathode 46 is provided at a position corresponding to the window 43.

Then, the outer peripheral portion of the substrate 40 is sealed to the substrate 44 by an airtight sealing portion (not shown) through a spacer (not shown) for keeping the separation process between the substrates 40 and 44 constant, and thus the substrate 40 ,
An anode 42 and a cathode 46, and a discharge gas medium, for example, a mixed gas of Ne and Ar, sealed so as not to leak to the outside are enclosed between 44. The anode 42 and the exposed portion of the cathode 46 are arranged so as to face each other, and a discharge cell for optical writing is formed in a region where the exposed portion of the anode 42 and the exposed portion of the cathode 46 face each other. Incidentally, 56 is a current limiting resistor connected in series to the anode 42, 58 is an auxiliary discharge current limiting resistor connected in series to the auxiliary discharge anode 54, and 60 is a power supply for auxiliary discharge.

FIG. 3 is a diagram for explaining an example of the driving method of the optical head of the first embodiment, and shows a time chart of the data signal A ₁ and the scanning signals C _{1 to} C ₈ as an example.

In driving the optical head of this embodiment having the above-mentioned structure, the ON scanning signals of the scanning signals C ₁ , C ₂ , ..., C ₈ are supplied as the voltage signal of 0V and the OFF scanning signal is supplied as the cathode, for example. A pre-bias voltage of 60 V is applied as a voltage signal to the scan electrodes 481, 482, ..., 488 sequentially to sequentially select the electrodes 481, 482 ,.

In addition, the ON data signal of the data signals A ₁ , A ₂ ...
The voltage signal and the off-data signal of, for example, the voltage signal of the anode pre-bias voltage of 120 V, and in accordance with the timing when the cathode 46 of the discharge cell to emit light for optical writing is turned on, the anode of the discharge cell to emit light. Apply the on-data signal to 42.

As shown in FIG. 2, for example, during the period from time S _{1 to} S ₂ , the anode 421 and the cathode 4611 are turned on, so that the light emission of the discharge cell is formed in the vicinity of the cathode 4611 and at the time S _{3 to} S ₄ . During the period, the anode 421 and the anode 4613 are turned on, and therefore the cathode 4
Light emission of the discharge cell is formed in the vicinity of 613, and light from the discharge cell is emitted through the window 43.

By the way, for example, the predetermined photo-writing discharge cells respectively formed in the regions where the anode 421 and the cathodes 4611, ..., 4618 face each other, and these anodes 422 and 4611 ,. The discharge light emission of the predetermined photo-writing discharge cells respectively formed in the regions facing the cathodes 4621, ..., 4628 is controlled via the predetermined electrodes 422 and 4621 ,. The crosstalk (erroneous discharge) does not mean the discharge between the predetermined anodes 42 and the cathodes 46 facing each other as described above, but the one anode 42 and the other anode 42 in the adjacent one and the other anodes 42. Discharge between the cathode 46 and the cathode 46 facing each other, for example, the anode 421 and the cathode 462.
The discharge between 1 and 1 is called erroneous discharge.

Such an erroneous discharge may cause an erroneous discharge.
The separation distance between 42 and the cathode 46, in particular the separation between the one anode 42 and the cathode 46 facing the other anode 42 and closest to the one anode (for example, between the anode 421 and the cathode 4621). Distance
By setting the distance such that erroneous discharge does not substantially occur, it is possible to prevent and prevent erroneous discharge. As a result, it is possible to avoid unnecessary optical writing due to light emission (erroneous light emission) due to erroneous discharge. .

Moreover, since the distance between the one anode 42 and the cathode 46 facing the other anode 42 and closest to the one anode 42 is set to a distance that does not substantially cause an erroneous discharge, the adjacent one Even if the gap between the other anode 42 and the other anode 42 is wide enough not to separate the light emitting dots practically enough, the floating electrode 62 having the window 43 and having a light shielding property makes the light emitting dots sufficiently clear in practical use. Therefore, a high-resolution optical head which can be separated and therefore can obtain a sufficiently clear dot-shaped light emitting dot for practical use can be prepared.

Further, in the case of preventing the erroneous discharge by providing the partition wall so as to be protruded, conventionally, the barrier ribs having a predetermined height sufficient to prevent the erroneous discharge by repeatedly performing the thick film printing are formed in layers. Must repeat the work of aligning and printing the next thick film layer on the thick film layer printed at the partition formation position, and the shape of the laminated thick film layer is destroyed, and so on. It is difficult to accurately form the partition wall of the pattern at a predetermined position, which causes a decrease in the yield of the optical head and an increase in the cost of the optical head. However, as described above, in this embodiment the anode 42
By setting the separation distance between the cathode 46 and the cathode 46 to be a distance that can substantially prevent erroneous discharge, it is not necessary to form a partition wall having a predetermined height between the adjacent anodes 42, and the anode 42 and the floating electrode 62 can be easily formed. Can be formed. That is,
The anode 42 and the floating electrode 62 can be easily formed by forming an electrode layer made of a light-shielding material on the substrate and then patterning this electrode layer to form the anode 42 and the floating electrode 62.

Therefore, according to this embodiment, it is possible to manufacture an optical head which can prevent post-discharge and can separate the emission dots clearly and practically with good yield.

(Modification) FIG. 4 is a plan view of a principal part similar to FIG. 1 (A) for explaining the modification of the first embodiment described above. The components corresponding to those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In this modification, the window 43 for the cathode 46 facing the anode end is formed in the same manner as in the first embodiment except that it is different from the first embodiment.

As shown in FIG. 4, in this example, the window 43 for the cathode 46 facing the anode end is formed by cutting out the side edge portion of the floating electrode 62. For example, the window 43 for the cathode 4628 is formed.
Is formed by the notch c of the floating electrode 622.

Also in this modification, the same effect as that of the first embodiment can be obtained.

Second Embodiment FIG. 5 is used to explain the configuration of the second embodiment. FIG. 1 (A)
It is a figure similar to. The components corresponding to those in the first embodiment are designated by the same reference numerals and the detailed description thereof will be omitted.

The second embodiment is different from the first embodiment in that predetermined photo-writing discharge cells are arranged in a staggered arrangement. Hereinafter, differences from the first embodiment will be described.

As shown in the figure, in this second embodiment, the cathodes 46 are alternately arranged on one side and the other side to form a cathode group on one side and the other side, and the one cathode group (4611, 4613, ... , 461
7, 4621, ...) and the other side of the cathode group (4612, 4614,
, 4618, 4622, ...) are spaced apart from each other. These cathodes 46
The tips of the cathodes are exposed without being covered with the emission control layer 50, and therefore the exposed portions of the cathodes 46 are alternately arranged on one side and the other side, and are staggered.

The anode 42 and the floating electrode 62 extend from one side to the other side so as to cover the exposed portions of the cathode 46 on one side and the other side when seen in a plan view, and the window 43 is formed on the cathode of each electrode 62. They are provided on the anode 42 and the floating electrode 62 so as to face the positions corresponding to the exposed portions of 46, and are arranged in a staggered manner.

The cathode window 43 facing the anode end is the anode as in the first embodiment.
42 and the floating electrode 62 are formed by cutting out, for example, a window 43 for the cathode 4627 facing the end of the anode 422 is formed by the cutout d of the anode 422 and the cutout e of the floating electrode 622. Window 43 for 4628, anode
It is formed by the notch f of 422 and the notch g of the floating electrode 622.

Also in the second embodiment, the same effect as in the first embodiment can be obtained. Further, since the discharge cells are arranged in a staggered arrangement, the arrangement density of the discharge cells can be made higher than that in the first embodiment.

The present invention is not limited to the above-described embodiments, and therefore, the shape, arrangement position, size, forming material and forming method of each constituent component, the driving method of the optical head, and the numerical conditions can be arbitrarily set. Can be changed.

Further, the present invention can be applied to gas discharge type optical heads having various structures, and therefore the present invention is not limited to the optical heads of the above-described embodiments.

(Effect of the invention) As is clear from the above description, according to the gas discharge type optical head of the present invention, one of the adjacent one and the other of the anodes, and the cathode facing the other anode, Since they are arranged so as to be able to substantially prevent post-discharge, unnecessary optical writing due to erroneous light emission can be avoided.

Moreover, since one anode and the cathode facing the other anode are arranged so as to be separated from each other so as not to substantially cause an erroneous discharge, the gap between the adjacent one and the other anodes sufficiently separates the light emitting dots in practical use. Even if the width becomes too wide, the light-emitting dots can be sufficiently and practically separated by the floating electrode having a light-transmitting window and having a light-shielding property. In addition to this, the anode is made of a light-shielding electrode, and this anode is also provided with a light-transmitting window, so it is necessary to create a high-resolution optical head that can obtain luminous dots in a dot shape that is sufficiently clear for practical use. Can be done.

Further, one anode and the cathode facing the other anode are separated from each other so as to substantially prevent erroneous discharge, and as a result, it is not necessary to form a partition wall having a height capable of preventing erroneous discharge between adjacent anodes. Moreover, the anode and the floating electrode can be easily formed.

For this reason, it is possible to manufacture an optical head which can prevent erroneous discharge and can separate the emission dots clearly and practically with good yield.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (A) and 1 (B) are diagrams for explaining the configuration of a first embodiment of the present invention, and FIG. 2 is a diagram showing a wiring structure of an optical head of the first embodiment. 3, FIG. 3 is a diagram for explaining a method of driving the optical head of the first embodiment, FIG. 4 is a diagram for explaining a modification of the first embodiment, and FIG. 5 is a diagram of a second embodiment of the present invention. 6 is a cutaway perspective view showing a main structure of a conventional DC-PDP, FIG. 7 is a view showing a wiring structure of the DC-PDP shown in FIG. 6, and FIG. 8 is a scanning diagram. FIG. 9 is a diagram for explaining signals, FIG. 9 is a diagram for explaining timing of discharge light emission, and FIG. 10 is a diagram showing a wiring structure of a gas discharge type optical head. 42 …… Anode, 46 …… Cathode 46 …… Window, 62 …… Floating electrode.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Furuya 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (56) References JP-A-63-279541 (JP, A) JP-A-SHO 64-82093 (JP, A)

Claims (1)

[Claims] 1. A gas discharge comprising a plurality of cathodes and a plurality of anodes arranged to face each other to discharge and emit a discharge gas enclosed between substrates, and at least one discharge cell formed between the cathodes and the anodes. In the mold optical head, one anode and a cathode adjacent to the other anode adjacent to the one anode are spaced apart from each other so as to substantially prevent erroneous discharge, and a floating electrode is provided between the adjacent anodes. Providing both the anode and the floating electrode using a light-shielding material, and providing a window for light transmission in a portion of the anode facing the cathode and a portion of the floating electrode facing the cathode. Characteristic gas discharge type optical head.