JPS6316547A - Discharging light emitting element - Google Patents

Abstract

PURPOSE:To prevent any crosstalk from occurring as well as to make high resolution realizable, by covering a position, excluding the vicinity of each intersection group of a scanning electrode group and a signal electrode group, with a dielectric layer by means of the specified setup. CONSTITUTION:Discharge gas 7 is sealed in a cell vessel to be formed with a substrate 2, a face plate 8 and a seal member 9, and a scanning electrode group 3 and a signal electrode group 5 being crossed with each other are installed there. The signal electrode group 5 is set up so as to be crossed aslant to the scanning electrode group 3 so as to cause a perpendicular, passing through each intersection of the scanning electrode group 3 and the signal electrode group 5 and being orthogonal with the scanning electrode group 3, to be paralleled at a regular interval in the horizontal direction, making it discharge at the selected intersection of the scanning electrode group 3 and the signal electrode group 5. In addition, a dielectric layer 13 is covered on a part exceluding the vicinity of each intersection group. With this constitution, crosstalk to be produced by influence between discharge points themselves is preventable, thus high resolution is realizable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a discharge light emitting device using plasma, and more particularly to a discharge light emitting device used as a writing light source in a color hard copy device.

[Summary of the Disclosure] This specification and drawings describe a discharge light emitting device using plasma, in which scanning electrode groups are arranged such that perpendicular lines that are oblique and orthogonal to the scanning electrode group are arranged at equal intervals. The present invention discloses a technology for preventing crosstalk and producing a high-resolution light-emitting element by coating a dielectric layer on a signal electrode group except for the vicinity of each intersection group. [Prior Art] In recent years, a printer capable of forming color images;
So-called color hard copy technology such as copying machines is becoming increasingly important in various fields. This type of color hard copy technology includes electrophotographic technology.

There are heat transfer technologies, etc. However, electrophotographic technology requires a complicated process to form an image, making it difficult to create a compact, simple-structured, inexpensive device, and thermal transfer technology requires an image-forming process by heating, making it expensive. It was difficult to obtain high-resolution images. In addition, since all of these technologies superimpose images of the three primary colors,
This method has disadvantages in that each image is likely to be misaligned and the time required to form one image is tripled. In contrast to such conventional technology,
Recently, some materials have become available that react only to light in a certain wavelength range and do not react to light in other wavelength ranges, and image forming methods using such materials have been proposed. This method involves mixing and encapsulating materials that react and harden with light in different wavelength ranges and pigments that make these materials develop different colors, and applying the mixture to paper, etc. via a binder. The photosensitive member is used as a photosensitive member, image information including light in a plurality of different wavelength ranges is irradiated onto the photosensitive member, and then an image is formed by applying pressure or the like. According to this method, since an image is created by a series of light irradiations, it becomes possible to easily obtain a high-quality image without color shift.

[Problems to be Solved by the Invention] Writing light sources in such image forming methods include ultraviolet rays in the vacuum ultraviolet region generated by discharge of a helium-xenon mixed gas, and gas discharges that utilize light emission of phosphors due to the ultraviolet rays. The use of display devices is being considered. However, the resolving power of this gas discharge display device is about 2 to 4 lines/mm, and it is difficult to achieve the resolution of about 8 to 16 lines/ml, which is required for the above-mentioned hard copy device, in terms of crosstalk. Furthermore, since these devices mainly use ultraviolet rays in the vacuum ultraviolet region within the cell container, the attenuation is significant in the air, making it impossible to irradiate the photosensitive member with the light.

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge light emitting device which eliminates the drawbacks of the conventional example, prevents crosstalk, has high resolution, and can be used as a writing light source in a short wavelength region such as ultraviolet light. be.

[Means for Solving the Problems] The present invention, as shown in FIGS. A scanning electrode group 3 and a signal electrode group 5 are provided which are filled with a gas 7 and intersect with each other.
and the signal electrode group 5 so that perpendicular lines passing through each intersection and perpendicular to the scanning electrode group 3 are lined up at equal intervals in the horizontal direction.
A discharge light emitting element in which a signal electrode group 5 is arranged diagonally across a scanning electrode group 3, and a discharge is caused at a selected intersection of the scanning electrode group 3 and the signal electrode group 5, It is characterized in that a dielectric layer 13 covers the portions except for the vicinity of each intersection group.

[Function] In the discharge light emitting device according to the present invention, as shown in FIG. 1, the portions of the scanning electrode group 3 and the signal electrode group 5 except for the vicinity of each intersection group are coated with the dielectric layer 13, so that Crosstalk caused by mutual influence between discharge points can be prevented. Furthermore, as shown in Fig. 2, by forming a thick dielectric layer and arranging it so that it comes into contact with the face plate 8 on the display side when the internal pressure is reduced, a pressure-resistant structure can be achieved. It is possible to prevent cell deformation due to

[Example] FIG. 1 is a plan view showing an example of a discharge light emitting device according to the present invention, and FIG. 2 is a partial sectional view thereof.

In FIGS. 1 and 2, the scanning electrode group 3 on the substrate 2 is arranged in parallel in a strip shape, and the signal electrode group 5 is arranged on the insulating layer 4.
The scanning electrode group 3 is arranged to intersect diagonally with respect to the scanning electrode group 3 via the scanning electrode group 3 . With such an electrode configuration, the distance between each intersection becomes wider, and discharge control becomes easier.

Copper, chromium, or the like is used for the scanning electrode group 3 and the signal electrode group 5, and both can be formed by vapor deposition using resistance heating or electron beam heating.

The insulating layer 4 is made of glass, SiO2, or the like, and can be formed by vapor deposition using electron beam heating. A dielectric protective layer 6 is further formed on the surface of the signal electrode group 5.
are uniformly formed. This protective layer is for preventing damage to the electrodes due to discharge, and its material and formation method are the same as those for the insulating layer 4. Note that if a dielectric material having a large secondary electron emission coefficient, such as magnesium oxide, is used for this protective layer, the discharge starting voltage can be lowered.

A dielectric layer 13 is formed in the scanning electrode group 3 and the signal electrode group 5 except for the vicinity of each intersection. The dielectric layer 13 may be formed by partially thickening the dielectric protective layer 6 described above, or if the dielectric protective layer 6 is not provided, a third layer made of the same material as the insulating layer 4 may be formed. This dielectric M13, which may be formed in the shape shown in FIG. 1, is formed so as to come into contact with the face plate 8 when the cell is depressurized as shown in FIG. 2, thereby making the entire cell a voltage-resistant structure. This makes it possible to prevent cell deformation due to atmospheric pressure. The cell gap in this case is usually 30J.
It is preferable to use a dielectric material of about 1,000 L to 1,000 L, and it is preferable to use glass, ceramics, etc., rather than forming a dielectric material by vapor deposition or the like. By using this method, patterning as shown in FIG. 1 can be easily performed.

A face plate 8 is arranged on the front surface of the substrate 2 at a predetermined interval, and the outer peripheries of the substrate 2 and the face plate 8 are sealed with a seal member 9. An opening 10 is formed at one end of the face plate 8 and is connected to a gas introduction path 12 having a mercury reservoir 11. As the material for the face plate 8, quartz or the like is used, which transmits relatively short wavelength ultraviolet rays. Further, the substrate 2 is desirably made of the same material as the face plate 8 in order to match the coefficient of thermal expansion. Further, as the sealing member 9, low melting point glass is used.

A discharge gas 7 is sealed in a discharge space of the cell container formed by the face plate 8 and the substrate 2. As this discharge gas, a mixture of mercury and an inert gas such as helium or argon is used. These mercury-containing discharge gases are suitable for obtaining light in a relatively short wavelength region such as ultraviolet rays, but since mercury has a low vapor pressure at room temperature,
It is necessary to heat the cell container with an appropriate heating means. 1 in the figure shows an example of such a heating means.
In order to maintain a uniform temperature throughout the cell container, it is desirable to use a planar heating element such as a ceramic heater.

In the above configuration, by arranging the perpendicular lines passing through each intersection of the scanning electrode group 3 and the signal electrode group 5 and orthogonal to the scanning electrode group 3 at equal intervals of 8 to 16/■, the equivalent height is It can be a high resolution array light source. A rectangular wave voltage with a frequency of 100 KHz and an inter-electrode voltage of about 300 V is sequentially applied at a duty of 1/8 to predetermined electrodes of the scanning electrode group 3 and the signal electrode group 5 of the discharge light emitting device thus obtained, and scanning is performed. By moving the photosensitive paper surface described above in a direction substantially perpendicular to the electrode group 3, it is possible to sequentially irradiate the paper surface with light containing ultraviolet rays in different wavelength ranges.

FIG. 3 is a schematic diagram showing another example of image formation using the discharge light emitting device according to the present invention. In Figure 3,
Reference numeral 20 denotes the discharge light emitting element described above, and each row sequentially emits light by a predetermined signal voltage applied from the scanning voltage applying means 14 and the signal voltage applying means 15. Signal voltage application means 1
5 includes signal delay means (not shown) for correcting the respective positions of the scanning electrode group 3. 18 is a photosensitive member, and for the purpose of confirming the operation of the discharge light emitting device 20, for example, diazo photosensitive paper or the like may be used. 16 is a wavelength filter for selecting light of a necessary wavelength for the photosensitive member 18, and 17 is an imaging means such as a lens.

In the above configuration, a signal corresponding to image information is applied from the scanning voltage applying means 14 and the signal voltage applying means 15 to the discharge light emitting element 20, and the photosensitive member 18 is moved in the direction of the arrow in FIG. 3 to perform exposure. By developing with a normal developing method, a good image with high resolution can be obtained.

[Effects of the Invention] As explained above, according to the present invention, it is possible to provide a discharge light emitting device that is free from crosstalk and has high resolution, is exposed to light in a plurality of different wavelength ranges, and has different wavelength ranges. When used as a writing light source for an image forming method using a photosensitive member that develops colors, color hard copies can be easily obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the discharge light emitting device according to the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a schematic configuration diagram showing another example of image formation. 2 two substrates, 3: scanning electrode group, 4: insulating layer. 5: Signal electrode group, 6: Dielectric protective layer, 7: Discharge gas, 13: Dielectric layer, 14: Scan voltage application means, 15: Signal voltage application means, 20: Discharge light emitting element.

Claims (1)

[Scope of Claims] 1) A discharge gas is sealed in a cell container formed of an insulating member, and a first electrode group and a second electrode group are provided which intersect with each other, and the first electrode group and the second electrode group are arranged to cross each other. The second electrode group is arranged diagonally with respect to the first electrode group so that perpendicular lines passing through each intersection of the second electrode group and perpendicular to the first electrode group are lined up at equal intervals in the horizontal direction. In the discharge light emitting device, the first electrode group and the second electrode group are arranged so as to intersect with each other, and the discharge is caused at a selected intersection point of the first electrode group and the second electrode group, and a portion other than the vicinity of each of the intersection groups is coated with a dielectric layer. A discharge light emitting device characterized by: 2) A discharge light emitting device characterized in that the dielectric layer is formed to become a part of the voltage withstanding structure of the cell container.