JPH08273561A - Fluorescent display device - Google Patents

Abstract

PURPOSE: To provide a fluorescent display device which allows fixed-pattern display and graphic display to be observed from two opposite sides. CONSTITUTION: This fluorescent display device 1 has an envelope 2 comprising first and second substrates 3, 4 and side plates 5. Display on a fixed display part 6 on the first substrate 3 is observed at the outside of the first substrate 3 via an anode conductor 7 and the first substrate 3, and at the outside of the second substrate 4 through the second substrate 4. A first dot display part 11 on the first substrate 3 provides graphic display. This display is observed at the outside of the first substrate 3 via an anode conductor 12 and the first substrate 3. A second dot display part 17 of the same constitution as the first dot display part also exists on the inner surface of the second substrate 4. Inside the envelope 2, both of the dot display parts 11, 17 and the fixed display part 6 are shielded by a shielding plate 22. Both the graphic and fixed-pattern displays can be observed simultaneously from both sides of the envelope 2. Since each display part is enclosed in one envelope 2, the display device can be made compact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display device capable of observing the same pattern from two surfaces of a box-shaped outer shape.

[0002]

2. Description of the Related Art Generally, a signboard, an emergency light and the like display the same display pattern on both sides. As such a guide light, as shown in FIG.
Display patterns 101, 1 formed on both sides of the substrate with acrylic or the like
It is known that 01 is arranged. Further, as a double-sided display element that displays information from two opposite surfaces, one in which two ordinary display elements are combined and each display surface is arranged on the opposite side is used. Are known. For example, in FIG. 4A, two fluorescent display tubes 102, 102 are arranged back to back, and each fluorescent display tube 102 is connected to a common drive substrate 103. FIG. 4B shows two LED display devices 10.
4, 104 are arranged back to back with a common drive substrate 105 in between. FIG. 4C shows two LCD display devices 107, with a common backlight 106 in between.
107 is arranged.

[0003]

A signboard or a guide light which is viewed from both sides as shown in FIG. 4 (d) can display only a fixed pattern and cannot display a moving image or an arbitrary pattern. There wasn't. According to the display elements shown in FIGS. 4 (a) to 4 (c), it is possible to display a moving image or an arbitrary pattern, but since only two ordinary display elements are combined, a single-sided display is possible. The cost will be double compared to the case. Further, the thickness of the entire device is twice as large as that of a normal display device, and it cannot be used unless the installation space has a sufficient margin.

The present invention provides a fixed pattern display and
It is an object of the present invention to provide a fluorescent display device capable of displaying arbitrary patterns and observing these displays from two surfaces opposite to each other.

[0005]

A fluorescent display device according to a first aspect of the present invention includes a box-shaped envelope, and a fixed display portion for displaying a fixed pattern on each of two surfaces of the envelope. It is characterized by having a dot display section for displaying an arbitrary pattern constituted by a large number of selectively emitting light emitting dots on the two surfaces of the envelope.

According to a second aspect of the present invention, there is provided the fluorescent display device according to the first aspect, wherein the envelope has two light-transmitting substrates which face each other at a predetermined interval. And a fixed display portion is formed by a translucent anode conductor formed on the inner surface of one substrate of the envelope and a phosphor layer formed on the surface of the anode conductor. The dot display portion is composed of a light-transmissive anode conductor formed on each inner surface of the two substrates of the envelope and a phosphor layer formed on the surface of each anode conductor. It is characterized by that.

[0007]

The display of the fixed display portion formed on the inner surface of one substrate of the envelope is observed from the outside of one substrate through the transparent anode conductor and the one substrate. Further, the display of the fixed display portion is observed from the outside of the other substrate through the other substrate. The display of the one dot display portion formed on the inner surface of the one substrate of the envelope is observed from the outside of the one substrate through the translucent anode conductor and the one substrate. The display of the other dot display portion formed on the inner surface of the other substrate of the envelope is observed from the outside of the other substrate through the light-transmitting anode conductor and the other substrate.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fluorescent display device 1 according to a first embodiment will be described with reference to FIGS. The fluorescent display device 1 of this embodiment is used as a guide light in an emergency. First, the configuration of the fluorescent display device 1 of the present embodiment will be described with reference to FIGS. 1 and 2. The envelope 2 of the fluorescent display device 1 is disposed between the first substrate 3, the second substrate 4 facing the first substrate 3, and the outer peripheral edge portions of the first and second substrates 3 and 4. It is a box-shaped container in which the side plate 5 is sealed with a sealing material. The first and second substrates 3 and 4 have insulation and translucency, and are made of, for example, glass plates.

A fixed display portion 6 serving as an anode is formed on the upper half of the inner surface of the first substrate 3. The fixed display portion 6 includes an anode conductor 7 and a phosphor layer 8. On the inner surface of the first substrate 3,
A predetermined pattern of light-transmitting anode conductor 7 is formed. As shown in FIG. 1, this pattern is, for example, an arrow in each direction, a mark, a mark, etc., and is used for instructing an evacuation route in an emergency. A phosphor layer 8 is deposited on the surface of the anode conductor 7. The fixed display portion 6 is the first of the envelope 2.
A fixed fixed pattern is displayed on both the substrate 3 side and the second substrate 4 side.

A planar control electrode 9 is formed on the inner surface of the first substrate 3 in the vicinity of the fixed display portion 6. A filamentous cathode 10 is stretched above the fixed display portion 6.

The electrons emitted from the cathode 10 are controlled by the control electrode 9 to impinge on the fixed display portion 6 and cause the fixed display portion 6 to emit light. The luminescent display of the fixed pattern on the fixed display portion 6 is observed on both sides of the envelope 2. That is, the light emission of the phosphor layer 8 of the fixed display portion 6 is
It is observed outside the first substrate 3 through the anode conductor 7 and the first substrate 3. In addition, the phosphor layer 8 of the fixed display portion 6
The light emission of is also observed outside the second substrate 4 after passing through the second substrate 4. Since the control electrode 9 is provided on the same plane around the fixed display portion 6, the control electrode 9 does not interfere with the display.

Since the display contents of the fixed display section 6 are the symbols as described above, no inconvenience occurs even if one display is observed from the opposite side. For example, if an arrow is displayed,
If the arrow is facing right when viewed from the side of the substrate 3, the arrow is facing left when viewed from the opposite side of the second substrate 4, indicating the same direction when the fluorescent display device 1 is actually installed. ing. The circles and circles have the same shape when viewed from either side.

On the lower half of the inner surface of the first substrate 3, a first dot display portion 11 which is an anode is formed. The first dot display section 11 includes a large number of dot-shaped anode conductors 12 and a phosphor layer 13. The anode conductors 12 are arranged side by side in a plurality of rows in the vertical and horizontal directions on the lower half portion of the inner surface of the first substrate 3, and each has a light-transmitting property. A phosphor layer 13 is deposited on each anode conductor 12. Although illustrated in a simplified manner in FIG. 2, the first dot display unit 11 of the present embodiment has a 176 × 1
It consists of a 6-dot matrix anode. If one character is displayed with 16 × 16 dots, 11 characters can be displayed at one time on one screen. A light shielding film 14 is formed on the inner surface of the first substrate 3 so as to surround the first dot display section 11.
A control electrode 15 is provided above the first dot display section 11, and a filamentous cathode 16 is stretched above the control electrode 15. The first dot display section 11 displays an arbitrary graphic display of characters and figures toward the outside of the envelope 2 on the first substrate 3 side.

A second dot display portion 17, which is an anode, is formed in the lower half of the inner surface of the second substrate 4 facing the first dot display portion 11. Second dot display section 17
The configuration of is the same as the configuration of the first dot display section 11.
That is, the second dot display portion 17 also includes a large number of dot-shaped anode conductors 18 and phosphor layers 19. The anode conductors 18 are arranged in a plurality of rows in the vertical and horizontal directions on the lower half portion of the inner surface of the second substrate 4, and each has a light-transmitting property. A phosphor layer 19 is deposited on each anode conductor 18. The light shielding film 20 is formed on the inner surface of the second substrate 4 so as to surround the second dot display portion 17.
Are formed. A control electrode 21 is provided above the second dot display section 17, and a filamentous cathode 16 is stretched above the control electrode 21. The cathode 16 is common to the first dot display section 11. The second dot display unit 17 performs arbitrary graphic display toward the outside of the envelope 2 on the second substrate 4 side.

Inside the envelope 2, a shield plate 22 is provided between the first substrate 3 and the second substrate 4. The shield plate 22 is located between the first and second dot display portions 11 and 17 and the fixed display portion 6. The shield plate 22 prevents light from the first and second dot display sections 11 and 17 from leaking from the fixed display section 6, and also allows light from the fixed display section 6 to be leaked from the first and second dot display sections. Prevent leakage from 11 and 17. The shielding plate 22 may be made of a material having a light shielding property, or may be a plate material such as glass coated with a light shielding film.

Referring to FIG. 3, the fluorescent display device 1 of the present embodiment.
The drive circuit of is explained. Display data is given to the drive circuit of the fluorescent display device 1 via the input unit 30 that is selectively switched to either a wired input or a wireless input. The display data is input to the CPU 32 via the decoder 31. The CPU 32 causes the gate array 33 to generate a drive signal. The drive signal generated by the gate array 33 causes R
The first and second dot display sections 11 and 17 are driven by the driver 35 based on the data of the plurality of display patterns held in the AM 34. Further, the CPU drives the fixed display section 6. The character generator 36 is a kind of ROM that is provided as necessary to determine the character code in order to create the data for displaying the character from the character code when the sent character data is the character code. is there.

Since the fluorescent display device 1 of the present embodiment is a guide light in an emergency, a display signal is constantly given from the input unit 30, and the fixed display unit 6 displays an emergency exit or the like, a direction in which the emergency exit or the like is present, and the like.
A necessary pattern is turned on to display an evacuation route, etc., and necessary character information or image information is displayed on the first and second dot display portions 11 and 17. However, at times other than an emergency, the fixed display section 6 is turned off, the time and the like are displayed on the first and second dot display sections 11 and 17, and the above-mentioned display is performed only in an emergency. It may be configured.

According to this embodiment, it is possible to observe both the same graphic display and fixed pattern display from both sides of the envelope 2 at the same time. Since each display section is housed inside one envelope 2, unlike the conventional double-sided display element in which two display elements are simply combined, the outer shape and dimensions can be made compact and thin, No large installation space is required.

Fixed display sections 6 and 2 are independent of each other.
Although one dot display unit 11 and 17 is provided in one envelope 2, a fixed display unit 6 and two dot display units 11 and 1 are provided.
Since 7 is partitioned by the shielding plate 22, they do not interfere with each other in display. In addition, the two dot display units 11 and 17
Are facing each other, but both dot display parts 11, 17
Both are so-called front-emission type display units that perform display through their own anode conductors and the substrate on the side where the anode conductors are provided. Since the portions other than the light-emitting portions are covered with the light-shielding films 14 and 20, they are mutually displayed. Will not hinder the

Further, one fixed display portion 6 is provided on the first substrate 3
Although it is observed as a front-emission type display section from the side of, and is observed through only the second substrate 4 from the side of the second substrate 4, its control electrode 9 is formed on the first substrate 3. Since it is flat, there is no problem in visual recognition from the second substrate 4 side.

Since the first dot display section 11 and the second dot display section 17 share the cathode 16, the power consumption can be saved.

[0022]

According to the fluorescent display device of the present invention, the fixed display portion and the dot display portion are housed inside a common envelope so that the two can be observed from both sides of the envelope. The following effects can be obtained as compared with the conventional display element in which elements are combined.

1) The device has become thinner. 2) Manufacturing cost is reduced. 3) It became compact. 4) Since a plurality of display parts are provided in the common envelope, it is possible to use a common cathode and reduce power consumption. 5) Various colors can be displayed by selecting the phosphor, and a moving pattern and a fixed pattern can be displayed at the same time. 6) Since it is a display element based on the principle of a fluorescent display tube, it has a wide viewing angle, good visibility, and is particularly suitable as an emergency light.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a sectional view of the first embodiment.

FIG. 3 is a drive circuit diagram of the first embodiment.

FIG. 4 is a cross-sectional view showing a configuration of a conventional display element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluorescent display device 2 Envelope 3 First substrate 4 Second substrate 6 Fixed display part 7 Anode conductor of fixed display part 8 Phosphor layer of fixed display part 11 First dot display part 12 First dot display part Anode conductor 13 Phosphor layer of first dot display section 17 Second dot display section 18 Anode conductor of second dot display section 19 Phosphor layer of second dot display section

Claims (2)

[Claims] 1. An arbitrary pattern composed of a box-shaped envelope, a fixed display section for displaying a fixed pattern on each of two surfaces of the envelope, and a large number of selectively emitting light-emitting dots. And a dot display section for displaying on each of the two surfaces of the envelope. 2. The outer envelope seals the outer peripheral portions of two light-transmissive substrates facing each other at a predetermined interval,
The fixed display portion is composed of a light-transmitting anode conductor formed on the inner surface of one substrate of the envelope and a phosphor layer formed on the surface of the anode conductor, and the dot display portion is 2. The fluorescent display device according to claim 1, comprising a light-transmissive anode conductor formed on each inner surface of the two substrates of the envelope, and a phosphor layer formed on a surface of each anode conductor. .