JPS6251133A - Discharge-type light emitting device - Google Patents

Abstract

PURPOSE:To obtain a faceplate high in luminance and colorimetric purity, by disposing a group of electrodes in a striped manner on a base plate, providing a dielectric layer, and thereafter disposing three kinds of electrodes coated with fluorescent substances for three colors, so that the three kinds of electrodes constitute stripes. CONSTITUTION:Striped electrodes 2 are manufactured on a base plate 1 of glass or the like by etching or the like. A dielectric layer 4 shaped as a sheet or the like is provided on the electrodes 2. Wires 3-R, 3-G, 3-B of aluminum, copper or the like coated with fluorescent substances for three colors R, G, B are provided as electrodes 3 in a striped manner on the dielectric layer 4 across the electrodes 2. This assembly is put in a container in which a discharge gas is enclosed, so that a discharge-type light emitting device capable of color display with plasma is constituted. As a result, the electrodes 3 correspond to the fluorescent substances one by one to constitute a faceplate high in luminance and colorimetric purity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device using plasma, and particularly to a discharge type light emitting device capable of color display.

[Summary of the Disclosure] The present specification and drawings describe a discharge type light emitting device using plasma, in which first lights are arranged so as to intersect with each other on a substrate.
By providing a dielectric layer between the electrodes at least at the intersection of the electrode group and the second electrode group, and coating the first and second electrode groups with a phosphor, it is possible to achieve brightness, high monochromatic linearity, and a large screen. The present invention discloses a technique for producing a light emitting device with sufficiently high luminance when the light is emitted.

[Prior Art] Conventionally, as this type of light emitting device, for example, Japanese Patent Laid-Open No. 47-1
The one disclosed in No. 2 is known. As shown in FIG. 2, in this device, a plurality of flat second electrodes 23 are placed on a plurality of flat first electrodes 22 arranged on a substrate 21) via a dielectric layer 24. A protective film 27 is formed on the entire substrate, and a container 25 is provided on the electrode side of the substrate 21 to supply the discharge gas 2.
6 is enclosed. This device is a so-called flat plasma display device in which a voltage is applied between both electrodes by a power source 28 to emit light by discharge.Since the spacing between the electrodes is defined by the dielectric layer 24, a uniform display device with a large area can be realized. It was a good thing to get. In addition, when colorizing such a flat plasma display device, the substrate 2
Generally, a method is used in which a phosphor is applied to the inside of the container 25 facing the container 25.

[Problems to be solved by the invention] However, as is commonly done in color display,
In order to apply the three types of phosphors R (red), G (green), and B (blue) in stripes, the phosphors are dispersed in a photoresist, applied to a glass plate, and then applied using a photomask. It is necessary to repeat the patterning process three times, and it is practically difficult to perform this process accurately over a large area. Furthermore, since there is a distance between the electrode intersection point, that is, the discharge position, and the phosphor surface, optical crosstalk occurs due to the spread of ultraviolet rays, and a highly pure color display cannot be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge type light-emitting device which eliminates the drawbacks of the conventional example and can easily provide a large-area color display with bright, brown color purity.

[F stage that does not solve the problem] The technical stage of the present invention will be explained using FIG. 1 corresponding to the embodiment. In FIG. 1, strip-shaped electrodes 2 forming a first electrode group are arranged on a substrate 1 made of glass, acrylic, epoxy, ceramics, etc.
A dielectric layer 4 of i02 shade is formed. In this case, the striped electrodes 2 can be easily formed by etching a copper or aluminum layer, and the dielectric layer 4 can be formed by laminating sheet-like dielectrics or by coating with a barcoder or the like. . Alternatively, a printed circuit board known as a flexible printed circuit board in which striped copper electrodes are sandwiched between sheets of polyimide or the like may be bonded to the substrate 1]. Next, on this dielectric layer 4, aluminum, gold,
Three types of wire rods made of copper, tungsten, and iron are coated with phosphors corresponding to the three colors of R, G, and H.
The electrodes 3 are bonded one after another so as to form a stripe pattern, thereby forming the electrodes 3 that will become the second electrode group.

Although FIG. 1 shows the electrode 3 having a circular cross section, the cross-sectional shape is not limited to a circular shape.

[Function] Because the wire rods coated with R, G, and H phosphors are arranged in stripes, the wire rods, or electrodes, and the phosphors correspond as a pair, resulting in beautiful color display without color shift. .

Furthermore, by coating the wire with a phosphor, it is possible to efficiently utilize ultraviolet rays, electrons, and ions caused by discharge without attenuating them in the gas space as in the conventional example. Furthermore, conventionally, a phosphor was provided inside the container and the surface opposite to the viewing surface emitted light, so the observer had to see the attenuated light passing through the phosphor. However, according to the above configuration, the light emitting surface is viewed directly, and a bright color display can be obtained.

[Example] FIG. 1 is a perspective view of a substrate showing an embodiment of the present invention.

In this embodiment, the board 1 is 85 size (17
A glass plate (8 x 252 mm) was used, and as the electrode 2, a printed circuit board was used in which the upper and lower sides of a group of copper electrodes arranged at a pitch of 1/20 inch were sandwiched between polyimide 2 with a thickness of 50 gm, and the electrodes were bonded onto the board 1. Ta. In addition, as the electrode 3, three types of copper wire 3-R with a diameter of 100 g (7) coated with R, G, and B phosphors were added to the north of the polyester coating.
3-G and 3-B were wound at a pitch of 1/10 inch so as to be perpendicular to the electrode 2 in a plane. The phosphors used at this time were the following three types manufactured by Kasei Optonics.

R:, (Y, Cd)BO3: EuG: Ba0
・8Aj) 20:+: MnB: BaMgA1'
z023: Eu21 These phosphors were mixed with chloroform (CCR) along with Unitika's U polymer as a binder.
a) A copper wire coated with polyester was immersed in the solution dispersed in the solution to form a phosphor layer on the polyester coated mh. Furthermore, this substrate was placed in a container as shown in FIG. 2, and a xenon-helium mixed gas (2% xenon, the rest was helium) was filled.

In the device according to the configuration shown in L, there is an I M
When an AC voltage of 100 Hz and 100 OV (peak value) was applied, bright red, green, and blue colors with no crosstalk appeared.
Obtained colored luminescence. This light emission takes place for 11 hours when the AC power is applied.
Even when the voltage was turned on and off at a duty ratio of 500 and the voltage was applied only for a period of 11,500, the brightness was sufficient.

[Effects of the Invention] As described above, according to the present invention, it is possible to obtain a discharge type light emitting device that is bright, has a high monochromatic linearity, and can easily be made into a large screen.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional device. ■... Substrate, 2, 3... Electrode, 4... Dielectric layer.

Claims (1)

[Claims] (1) A substrate on which first and second electrode groups are arranged so as to intersect with each other is provided in a container filled with discharge gas, and a discharge is caused at a selected intersection of the first and second electrodes. In the discharge type light emitting device, at least the first and second
2. The discharge type light emitting device according to claim 1, wherein a dielectric layer is provided between the electrodes at the intersection of the electrode groups, and the first and second electrode groups are coated with a phosphor.