JPH0513026A - Fluorescent character display device - Google Patents

Abstract

PURPOSE:To provide a means which can drive electronic devices, such as another fluorescent character display device, an LED and the like, is economically and spatially effective in designing a system. CONSTITUTION:A driving Si IC chip 8 has a power terminal, a control-signal input terminal and plural driver output terminals 17l to 17r for controlling the lighting and non-lighting action of the anode 6, and also part of an external terminal is connected to each of the driver output terminals 17l to 17r.

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, and more particularly to a so-called chip-in-glass type fluorescent display device in which an integrated circuit chip for a drive circuit is built in a vacuum envelope.

[0002]

2. Description of the Related Art A conventional chip-in-glass (hereinafter referred to as CIG) type fluorescent display device has a built-in Si device as shown in FIG.
In the integrated circuit chip 8, all or some of the power supply terminals and the control signal input / output terminals are external terminals 17 of the CIG type fluorescent display device.
Was electrically connected to.

The operation will be described below with reference to FIG. A vacuum envelope is constituted by the anode substrate 1, the spacer glass 3, the cover glass 2, and the low-melting glass 7 for hermetically sealing the space between them. On the anode substrate 1, an anode 6 mainly having a phosphor film formed in a predetermined display pattern is provided. Anode 6
A mesh-shaped metal electrode (hereinafter referred to as a grid electrode) 5 covering the anode 6 and maintaining a predetermined interval is provided on the above, and further, maintaining a predetermined interval on the metal electrode. The linear cathode 4 is spanned using a support structure 10.

In use, the linear cathode 4 becomes an electron source which emits thermoelectrons when the potential of the grid electrode 5 becomes positive with respect to the potential of the linear cathode 4 by being electrically heated.
The emitted thermoelectrons impact the anode 6 having a positive potential with respect to the potential of the linear cathode 4 to cause it to emit light. It is the driving Si integrated circuit chip 8 that selectively controls the potentials of the plurality of anodes 6 to be positive with respect to the potentials of the linear cathodes 4 to display a predetermined pattern by light emission. The connecting electrode (commonly called pad) of the driving Si integrated circuit chip 8 and the thin film or thick film-like conductor wiring (indicated by a broken line in the figure) for electrically connecting the anode 6 and the external terminal 17 are thin metal wires 12. Connected.
That is, the fluorescent display device of this type is driven by a power supply and a control signal supplied from the outside through the external terminal 17 and is driven by a driving Si.
It is controlled via the integrated circuit 8.

As the driving Si integrated circuit chip 8, a structure having a block diagram shown in FIG. 3 is widely used. Such a driving Si integrated circuit chip 8 is connected to a low-potential power source and a single-potential or 2-potential high-potential power source to receive power supply, and receives a clock signal, serial data input, and other necessary control signals. Receive and operate. Each of the plurality of output drivers is connected to a separate anode 6 via a thin metal wire 12 and a conductor wiring 11, and
The lighting and non-lighting of are controlled according to the control signal.

Further, such a driving Si integrated circuit chip 8 is provided.
Are often used in multiple connections (cascade connection). The linear cathode 4 has cathode terminals 17a and 17b.
Power is supplied to the grid electrode 5 through the grid terminal 17c, and the necessary potential is applied to the grid electrode 5c.

[0007]

However, this conventional C
In the IG type fluorescent display device, even if the built-in driving Si integrated circuit chip has, for example, 40 driver output circuits, only 30 anodes are controlled by the driving Si integrated circuit chip. If so, 10 driver output circuits will not be used.

When a CIG type fluorescent display is used in a device system using a plurality of fluorescent display devices, there is a problem that a total of more drive Si integrated circuit chips than necessary must be used due to the above circumstances. there were. For example, 2 with 25 and 10 anodes respectively
In a device system using one CIG type fluorescent display device, if each CIG type fluorescent display device incorporates a driving Si integrated circuit chip having 40 driver output circuits, these two fluorescent display devices in total. The number of the 35 anodes included in the device can be controlled by one driving Si integrated circuit chip having 40 driver output circuits, but two driving Si integrated circuits each having 40 driver output circuits Will be controlled and will be in vain.

An object of the present invention is to provide a fluorescent display device for a device system which can effectively utilize a driving Si integrated circuit without waste.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a vacuum envelope, a cathode as an electron source arranged in the vacuum envelope, and a phosphor mainly emitting light by the impact of electrons from the cathode. A plurality of anodes, a mesh metal electrode for controlling emission of electrons from the cathode, a driving Si integrated circuit chip for controlling lighting and non-lighting of the anode, the cathode, the metal electrode, and the Si integrated In a fluorescent display device having an external terminal electrically connected to a circuit chip, the Si integrated circuit chip for driving has a power supply terminal,
A control signal input / output terminal and a plurality of driver output terminals for controlling lighting and non-lighting of the anode are provided, and a part of the external terminals is connected to the driver output terminal.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.

As shown in FIG. 1, the driver output terminals 17l to 17r of the external terminals are connected to the driver output circuit of the driving Si integrated circuit chip 8. Therefore,
The potential of the driver output terminals 17l to 17r is S for driving.
the integrated circuit power supply terminal 17d via the i integrated circuit chip 8;
It is controlled by the potential of 17e and the control signals of the integrated circuit control signal terminals 17f to 17i. Therefore, if the driver output terminals 17l to 17r are connected to the anode terminal of a fluorescent display device not equipped with another driving Si integrated circuit chip, the anode 6 of the fluorescent display device connected to the driver output terminals 17l to 17r will be connected. It becomes possible to drive and control.

According to the above-mentioned embodiment, the CIG type fluorescent display device having the external terminals connected to the 13 driver output circuits provides the fluorescent display not having the driving Si integrated circuit chip having 13 anodes 6. Good results have been obtained in tests in which the device is controlled.

As another example, a test for driving and controlling a light emitting diode was conducted, and good results were obtained also in this example.

The external terminals, anodes, etc. shown in FIGS. 1 and 2 are merely examples, and there can be many variations in the number, shape, and the like.

Further, there are no particular restrictions on the function, the number of input / output signals, etc. of the driving integrated circuit chip shown in FIGS. 1, 2 and 3, and the one used in this description is only an example.

Further, in the description of the present embodiment, only the driving of the fluorescent display device and the light emitting diode is mentioned, but it is obvious that other electronic devices can be driven by the built-in Si integrated circuit chip.

[0019]

As described above, since the CIG type fluorescent display device according to the present invention has the external terminal electrically connected to the driver output circuit of the built-in driving Si integrated circuit chip, the other driving Si This has the effect of having the ability to drive and control a fluorescent display device that does not include an integrated circuit chip.

Therefore, by using the CIG type fluorescent display device according to the present invention, it is possible to reduce the total waste of the system and realize the economical effect of reducing the cost.

In addition, the driver output circuit of the driving Si integrated circuit chip is efficiently used as a system total, and there is an effect of providing a very effective design means for a system used in a place where the space requirement is reduced. is there.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of an example of a conventional CIG type fluorescent display device.

3 is a block diagram of the driving Si integrated circuit chip of FIG. 2. FIG.

[Explanation of symbols]

 1 Anode Substrate 2 Cover Glass 3 Spacer Glass 4 Linear Cathode 5 Mesh Metal Electrode (Grid Electrode) 6 Anode 7 Low Melting Glass 8 Si Integrated Circuit Chip 10 Support Structure 11 Conductor Wiring 12 Metal Fine Wire 17 (17a to 17i) External Terminal 17a, 17b Cathode terminal 17c Grid terminal 17d, 17e Integrated circuit power supply terminal 17f-17i Integrated circuit control signal terminal 17l-17r, 20 Driver output terminal 18 Power supply input terminal 19 Control signal input terminal

Claims (1)

Claims: 1. A vacuum envelope, a plurality of cathodes which are arranged in the vacuum envelope and serve as an electron source, and a plurality of phosphors which mainly emit light by the impact of electrons from the cathode. Anode, a mesh metal electrode for controlling the emission of electrons from the cathode, and a driving S for controlling lighting and non-lighting of the anode.
In a fluorescent display device having an i integrated circuit chip and an external terminal electrically connected to the cathode, the metal electrode and the Si integrated circuit chip, the Si integrated circuit chip for driving has a power supply terminal and a control signal input. A fluorescent display device comprising an output terminal and a plurality of driver output terminals for controlling lighting and non-lighting of the anode, and a part of the external terminal is connected to the driver output terminal.