JPS585943A - Display device and its manufacture - Google Patents

Abstract

PURPOSE:To realize a small light stable display having a good contrast by providing a black matter absorbing external light between a phsophor and the back surface of a light transmitting surface plate. CONSTITUTION:A black glass layer 8 adjusts the permeability of light. Both the layer 8 and a black dielectric layer 9 which are located on the inner side of a light transmitting surface plate 7 absorb external light. Among parts corresponding to the layer 8, luminous parts 24 of a phosphor 10 which is provided on the back of the layer 8 emit light due to electric discharge, and non-luminous parts 25 don't emit light since there is no electric discharge carried out at the parts 25. Owing to the above constitution, since the white phosphor 10 is located on the back surface of the layer 8, reflected light is not seen even when external light exists, and the contrast is increased. As a result, both part 21 where the black dielectric layer 9 exposed and the non-luminous parts 25 where the black glass layer 8 is exposed appear to be black by absorbing external light, and only the luminous parts 24 appear to be bright and luminos.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes a phosphor that emits light by being excited by a gas discharge or an electron beam to produce 9 numbers and 1 figure.

The present invention relates to a display device that displays a pergraph, etc., and a method for manufacturing the same.

The display of this type of display device in use in the United States consists of a portion of the display surface that emits light in response to discharge (hereinafter referred to as the light-emitting portion) and another portion (hereinafter referred to as the non-light-emitting portion). Contrast decreases due to reflection of ambient light (external light). Therefore, in order to prevent this decrease in contrast, a filter is externally attached to the outer surface of the light-transmitting face plate so that the display can be performed through the filter. FIG. 1(a) shows a schematic cross-sectional configuration of a DC gas discharge display device. In the figure, 1 is an insulating substrate, and 4 is an electrode formed on the insulating substrate 1, consisting of an anode 4a and an electrode 4b.

5 is a space created by the spacer 6. 7 is a translucent face plate, and 9 is a black material layer formed on the side of the translucent face plate opposite to the surface in contact with the outside air (hereinafter referred to as IkthI of the translucent face plate). Dero B, i.

is a phosphor formed at a position corresponding to the shadow 4b.

Reference numeral 11 is a filter provided to prevent the above-mentioned phosphor 10 from appearing white due to external light, and is made of glass, plastic, or the like. 12 is a crow frit for tree layer. The above-mentioned drawbacks of such a conventional device will be explained using FIG. 1(b). FIG. 1(b) is a diagram illustrating the contrast of a conventional display device, and shows the device in FIG. 1 (b) viewed from the direction of the arrow in the figure. In the figure, reference numeral 21 corresponds to the black electrically conductive object 'i in FIG. 1(a), the skin 9, which absorbs external light and appears black. 22 and 23 are the phosphor 10 of FIG. 1(a).
22 is a light-emitting part where a discharge has occurred and the phosphor has returned to its original state, and 23 is a non-light-emitting part where no discharge has taken place and the white phosphor reflects external light and shines white. Use the light emitting part. Therefore, the contrast between the light-emitting part 22 that emits light with a predetermined brightness and the non-light-emitting part 23 that appears white due to the reflection of external light decreases as the external light reflected from the non-light-emitting part 23 becomes stronger. Obfuscate the display. Therefore, conventionally, Figure 1 (a)
), the filter 11 has been formed as an iron layer on the translucent polarizing plate 7. However, this type of filter has drawbacks such as being expensive, making it difficult to place them one on top of the other, requiring more steps to manufacture the filter, requiring the device to be integrated into one fJ (fj), and also being subject to deterioration in shape over time.

An object of the present invention is to realize a display device that has good contrast, is small, lightweight, and stable.

In order to achieve the above object, the display device of the present invention uses a transparent l plate made of black glue that absorbs external light! It is an opportunity to provide this between the Ik surface and the phosphor.

The present invention will be explained below with reference to the drawings. FIG. 2 is an exploded perspective view of one embodiment of the present invention, and FIG. 3(a) is a sectional view thereof. In the figure, the same reference numerals as in FIG. 1(a) indicate the same or equivalent parts. In the figure, 2 is the terminal, 3 is the terminal 2 and the electrode 4
A lead wire 8 connects the light-transmitting face plate 7 and the phosphor 10. Here, the power of black color increases by 2 s and the transmittance of light is at! ! It has m@ which absorbs external light inside the translucent face plate 7 together with WI9 (black dielectric material). FIG. 3(b) is a diagram for explaining the contrast of the apparatus of the present invention, and shows the apparatus of FIG. 3(a) viewed from the direction of the arrow in the figure. In the figure, 24 and 25 are the parts corresponding to the black crow layer 8 in FIG.
The light-emitting part 25 is a non-light-emitting part in which the phosphor 10 on the side emits light and does not emit light because no discharge is occurring. In this way, the white phosphor 10 becomes the black color layer 80.
Since it is located on a flat surface, even if outside light is reflected, the reflected light becomes invisible and contrast is the same as above.

In other words, both the part 21 where the black dielectric A trade) flll 9 is born and the non-light-emitting part 25 where the black crow jrI is visible absorb external light and appear black, and only the light-emitting part 24 appears bright and original. Become.

In the above explanation, a gas discharge display device using a phosphor was described, but it goes without saying that the present invention can also be applied to a fluorescent display device using a phosphor that emits light when excited by an electron beam. CL FIG. 4(a) is a partial cross-sectional view of a conventional fluorescent display tube type display device shown for reference in order to aid understanding of the present invention, and IW1(b) is a partial cross-sectional view of a conventional fluorescent display tube type display device shown for reference in order to aid understanding of the present invention. A schematic configuration diagram of an embodiment is shown. In FIG. 4(a), reference numeral 7 denotes a light-transmitting face plate, and on the rear surface of this light-transmitting face plate there is an anode 31 for attracting electrons flying out from the cathode 34, and a firefly that emits light by the flying electrons. A light body 32 and a force are provided.Furthermore, the strength of the light emitted by the fluorescent body 32 is controlled by a grid 33.

The present invention can also be implemented in the above device as shown in FIG. 4(b). In other words, the black crow layer 8 is the substance of black.
is provided between the transparent face plate 7 and the anode electrode 31. As a result, the reflected light from the fluorescent body 32 becomes invisible and the third
The same effect as described in the embodiment shown in FIG.

Next, the railway method using the device according to the present invention explained above will be described in a second manner.
This will be explained using the figure and FIG. 3(a). First, terminals 2 and lead wires 3 are provided on an insulating substrate 1 made of soda glass or the like by thick film printing using gold paste or the like. Then anode 4
A basket 4 consisting of a cathode 4b and a cathode 4b is formed by printing and baking nickel paste. After forming the connection with each electrode in this way, a thin insulating node (not shown) is formed thereon except for the discharge portion and the terminal of each electrode. Next, discharge space 5
A spacer 6 made of soda glass or the like is placed on the substrate 1 to form a spacer. A translucent face plate 7 made of transparent sorter glass or the like is installed above it.

In addition, on the layer surface of the translucent face plate 7, a black color layer 8 is printed and fired at a predetermined position corresponding to the shade 4b. This black glass layer 8 is formed by printing and firing a mixture of black glass paste and transparent color paste. At this time, if the mixture of both components is appropriately selected, a glass layer having a desired transmittance can be easily formed. For example, the ratio of black glass paste and transparent glass paste is 1=3.
Transmittance is 83% when mixed at a ratio of , and 61% when mixed at a ratio of
,%, 3:1 is 44%. This relationship changes depending on the black density of the black glass, and as an example, FIG. 5 shows the relationship between the mixing ratio of black glass paste and transparent color paste and transmittance. In the figure, the vertical axis represents the transmittance, and the horizontal axis represents the mixing ratio.

By changing the mixing ratio kf, a transmittance of about 95% to 30% can be arbitrarily selected.

It goes without saying that the color layer 8 can also be formed using a color paste having a desired transmittance in advance. Next, a black bonded turtle body 9 is printed and fired on the translucent face plate in an area other than the previously provided black crow enlargement 8. In this step, since the black color layer 8 has already been printed, the body layer 9 can be displayed clearly on the printed black d' without any printing marks due to the viscosity of the paste.

It also has good reproducibility and is very effective. Furthermore, a phosphor 10 for color display is formed in the area where the black glass nozzle 8 is formed by a printing method, a spraying method, or the like. Note that by forming the black color layer 8, the phosphor 10
It also has the advantage of increasing adhesive strength. The fluorescent face plate 7 thus formed is superimposed on the insulating substrate 1 via the spacer 6, and the periphery is hermetically sealed with glass 7 (Watts 12, etc.), evacuated to a high vacuum, and Ne-Ar, etc. A display device is completed by sealing a gas such as e - Although the black glass layer 8 is formed after the black glass layer 8 is formed, it goes without saying that the black glass layer 8 may be formed after the black dielectric layer 8 is formed. Rir.

Furthermore, the black glass layer 8 was formed on the surface of the light-transmitting face plate 7 at a position corresponding to the electrode 4b. It may be formed in any manner.

[Brief explanation of the drawing]

Fig. 1(a) is a cross-sectional view showing an example of a conventional DC gas discharge display device, and Fig. 1(b) illustrates the appearance of a display when the external filter is removed in a conventional DC gas discharge display device. 2 is an exploded perspective view of an embodiment of the present invention, FIG. 3(a) is a sectional view of the embodiment of FIG. 2, and FIG. 3(b) is a representation of the embodiment of FIG. 2. A diagram explaining the situation, Figure 4 (a
) is a schematic partial diagram of a conventional fluorescent display IT type optical display device, No. 4
Figure (b) is a schematic partial diagram showing an embodiment of the fluorescent display tube type display device according to the present invention, and Figure 5 is a diagram showing the relationship between the mixing ratio of black glass paste and transparent glass paste and its transmittance. Figure 1 (a) (b) 2 Vi3 eyes (aan (b) 纂 4I21 (a) 5th [2] Black J Crow

Claims (1)

[Scope of Claims] 1. In a display device using a phosphor that emits light when excited by a gas discharge or an electron beam, the phosphor is attached to a light-transmitting face plate via a black material. A display device characterized by: 2. A method for manufacturing a display device using a phosphor that emits light when excited by a gas discharge or an electron beam, including a step of printing and firing a black glass layer on a transparent face plate, and a step of printing and firing a black glass layer on the black glass layer. A method for manufacturing a display device, comprising the step of attaching the phosphor described above.