JPH09212103A - Image forming device with keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device with the keyboard musical instrument which is free from installation conditions such as an installation place, an installing method, etc., in spite of an increase in the weight when the installed image forming device is large in size. SOLUTION: This device is equipped with an image forming device 1, which has a display panel equipped with a rear plate (not shown), a face plate (not shown) equipped with an image forming member and arranged opposite the rear plate, and a support frame (not shown) arranged between the face plate and rear plate, a keyboard musical instrument 3 which generates a sound when the keyboard is hit, and a fixture 2 for fixing the image forming device 1 and keyboard musical instrument 3. The image forming device 1 can be fixed to both the keyboard musical instrument 3 and fixture 2. Further, the image forming device 1 can be fixed to the keyboard musical instrument 3 through the fixture 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface conduction electron-emitting device, an electron source using the surface conduction electron-emitting device, an image forming apparatus using the electron source, and a method of using the image forming apparatus.

[0002]

2. Description of the Related Art There are two types of conventional electron-emitting devices, which are roughly classified into a thermoelectron-emitting device and a cold cathode electron-emitting device. The cold cathode electron emission device includes a field emission type (hereinafter,
FE type), metal / insulating layer / metal type (hereinafter M
IM type) and surface conduction type.

An example of the FE type electron-emitting device is WPDy
ke and WWDolan "Field Emission", Advance in Elec
tron Physics, 8, 89 (1956), CASpindt "Physical Pr
operties of thin-film field emission cathodes with
molybdenium cones ", J.Appl.Phys., 47, 5248 (1976)
And the like are known.

CA is an example of the MIM type electron-emitting device.
Mead "Operation of Tunnel-Emission Devices", J.App
l.Phys., 32, 646 (1961) and the like are known.

As an example of the surface conduction electron-emitting device, M.
I. Elinson, Radio Eng. Electron Phys., 10, 1290 (196
Those disclosed in 5) etc. are known.

In the surface conduction electron-emitting device, electrons are emitted by passing a current through a thin film having a small area formed on a substrate in parallel with the film surface. As the surface conduction electron-emitting device, the above-mentioned MIElinson, Radio Eng. Electron P
Hys., 10, 1290 (1965), etc. using SnO ₂ thin film, G. Dittmer: Thin Solid Films, 9, 317 (1972) using Au thin film, M. Hartwell and CGFonstad: I
In ₂ O ₃ / S by EEE Trans. ED Conf., 519 (1975)
Using nO ₂ thin film, Hisashi Araki et al .: Vacuum, Vol. 26,
No. 1, p. 22 (1983), etc. using a carbon thin film have been reported.

FIG. 15 is a schematic diagram showing the structure of a surface conduction electron-emitting device in a conventional example, which is described above in M. Hartwell.
and CGFonstad: IEEE Trans. ED Conf., 519 (1975), shows an element structure using an In ₂ O ₃ / SnO ₂ thin film.

The surface conduction electron-emitting device shown in FIG. 15 has a substrate 51, device electrodes 52 and 53, a conductive thin film 54, and an electron-emitting portion 55.

The conductive thin film 54 is composed of a metal oxide thin film or the like formed by sputtering in an H-shaped pattern. The electron emitting portion 55 is formed on the conductive thin film 54 by an energization process called energization forming described later. The element electrode spacing L in the figure is 0.5 to 1 [mm], and W * is 0.1.
It is set in [mm].

Conventionally, in these surface conduction electron-emitting devices, a conducting process called energization forming is performed on the conductive thin film 54 in advance before electron emission.
It is common to form the electron emitting portion 55. In the energization forming, a direct current voltage or a very slow rising voltage is applied to both ends of the electroconductive thin film 54 to energize the electroconductive thin film 54 to locally destroy, deform or deteriorate the electroconductive thin film 54 to be in an electrically high resistance state. That is, the electron emitting portion 55 is formed. In the surface conduction electron-emitting device that has been subjected to the energization forming process described above, a voltage is applied to the conductive thin film 54 to cause a current to flow through the device, whereby the electron-emitting portion 55 cracks in a part of the conductive thin film 54. Electrons are emitted from the vicinity.

The above-mentioned surface conduction electron-emitting device has an advantage that a large number of devices can be arrayed over a large area because it has a simple structure and is easy to manufacture.
Therefore, applied research on charged beam sources, display devices, and the like, which make use of this feature, has been conducted. As an example in which a large number of surface conduction electron-emitting devices are formed in an array, Japanese Patent Laid-Open No. 64-03133 is known.
No. 2, Japanese Unexamined Patent Application Publication No. 1-283949, Japanese Unexamined Patent Application Publication No.
As disclosed in Japanese Laid-Open Patent Publication No. 257552, there is a ladder type electron source. This is an electron source in which surface conduction electron-emitting devices are arranged in parallel and a large number of rows in which both ends of each device are connected by wiring (also called common wiring) are arranged.

[0012]

In the image forming apparatus using the above-mentioned display device or the like, a flat panel display device using liquid crystal has become popular in recent years in place of the CRT, but a display device using liquid crystal is Since it is not a self-luminous type, there are problems such as having to have a backlight, and development of a self-luminous display device has been desired.

As an example of a self-luminous display device, as disclosed in US Pat. No. 5,066,883,
An image forming apparatus is a display device in which an electron source in which a large number of surface conduction electron-emitting devices are arranged and a phosphor which emits visible light by electrons emitted from the electron source are combined.

There is also a gas discharge type image forming apparatus having a discharge electrode for generating discharge plasma.

However, the image forming apparatus described above is considered to increase in weight as the image forming apparatus becomes larger,
There is a problem that installation conditions such as installation location and installation method may be restricted.

In view of the above points, the present invention provides an image forming apparatus with a keyboard instrument in which, when a large-sized image forming apparatus is installed, the installation conditions such as an installation location and an installation method are not limited due to an increase in weight. The purpose is to

[0017]

In order to solve the above-mentioned problems, an image forming apparatus with a keyboard instrument according to the present invention is provided with a rear plate and an image forming member, and a face plate arranged to face the rear plate. And an image forming apparatus having a display panel including a support frame arranged between the face plate and the rear plate, a keyboard musical instrument that emits sound by hitting a keyboard, the image forming apparatus and the image forming apparatus. A fixture for fixing the keyboard instrument.

In the image forming apparatus with a keyboard musical instrument of the present invention, the image forming apparatus, the keyboard musical instrument, and the fixture are fixed to each other.

Further, in the image forming apparatus with a keyboard instrument of the present invention, the image forming apparatus is fixed to the keyboard instrument via the attachment.

In the image forming apparatus with a keyboard instrument according to the present invention, the keyboard instrument may include a piano, an organ, or an electric tone.

In the image forming apparatus with keyboard musical instrument of the present invention, the display panel may include a hermetically sealed container in which the rear plate, the face plate and the support frame are sealed.

In the image forming apparatus with a keyboard musical instrument according to the present invention, the rear plate may include an electron emitting element.

In the image forming apparatus with a keyboard musical instrument of the present invention, the electron-emitting device may include a surface conduction electron-emitting device.

[0024]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.

FIG. 1 is a view showing an image forming apparatus with a keyboard instrument according to a first embodiment of the present invention, and at the same time, showing an embodiment of the present invention. FIG. 1A is a schematic diagram of the device, and FIG. 1B is a schematic diagram showing an assembling method.

The apparatus shown in FIG. 1 includes an image forming apparatus 1 and
It is configured to have a fixture 2 and a piano 3 which is a keyboard instrument.

In the present invention, the image forming apparatus 1 is manufactured using an electron source substrate having a surface conduction electron-emitting device. The fixture 2 fixes the image forming apparatus 1 and the piano 3. As shown in FIG. 1B, the image forming apparatus 1 is fixed to a fixture 2, and the fixture 2 is a piano 3.
It is fixed to.

The surface conduction electron-emitting device used in the image forming apparatus of the present invention will be described below.

The basic structure of the surface conduction electron-emitting device of the present invention is roughly classified into two types: a plane type and a vertical type.

[1] Planar surface conduction electron-emitting device The planar surface conduction electron-emitting device will be described.

FIG. 5 is a schematic diagram showing the structure of a flat surface conduction electron-emitting device according to the present invention. FIG. 5 (a) is a plan view and FIG. 5 (b) is a sectional view.

The electron-emitting device shown in FIG.
And the device electrodes 52 and 53 facing each other, the conductive thin film 54, and the electron emission portion 55.

As the substrate 51, a quartz glass substrate, Na
It is possible to use a glass substrate having a reduced content of impurities such as, a soda-lime glass substrate, a glass substrate on which SiO ₂ is deposited by a sputtering method, a ceramic substrate such as alumina, or the like.

As the material of the device electrodes 52 and 53, a general conductive material can be used. Ni, Cr, Au, M
Metals or alloys such as o, W, Pt, Ti, Al, Cu, Pd, Pd, As, Ag, Au, RuO ₂ , Pd-Ag
It is possible to select from a printed conductor composed of a metal or a metal oxide such as the above and glass and the like, a transparent conductor such as In ₂ O ₃ —SnO ₂ and a semiconductor material such as polysilicon.

The element electrode interval L, the element electrode length W, the shape of the conductive thin film 54, etc. can be designed in consideration of the applied form.

The element electrode spacing L is several thousand [Å] to several hundred [μ]
m], more preferably 1 [μm] to 100 in consideration of the voltage applied between the device electrodes and the like.
The range is [μm].

The device electrode length W is in the range of several [μm] to several hundreds of [μm] in consideration of the resistance value of the electrodes and electron emission characteristics.

The film thickness d of the device electrodes 52 and 53 is 100
The range is from [Å] to 1 [μm].

In FIG. 5, the device electrodes 52 and 53 are stacked on the substrate 51 and the conductive thin film 54 is stacked thereon in this order. However, the conductive thin film 5 is formed on the substrate 51.
4, and the device electrodes 52 and 53 facing each other may be laminated in this order.

As the conductive thin film 54, it is preferable to use a fine particle film composed of fine particles in order to obtain good electron emission characteristics. The film thickness can be appropriately set in consideration of the step coverage to the device electrodes 52 and 53, the resistance value between the device electrodes 52 and 53, the forming conditions described later, and the like. The thickness of the conductive thin film 54 is usually several [Å] to
It is preferably in the range of several thousand [Å], more preferably in the range of 10 [Å] to 500 [Å]. The resistance value is such that Rs is 1 × 10 ² to 1 × 10 ⁷ [Ω]. Rs is a value obtained when the resistance R of a thin film having a thickness t, a width w, and a length l is R = Rs (l / w), and the resistivity of the thin film material is ρ. , Rs = ρ / t.

In the present invention, an energization process will be described as an example of the forming process. However, the forming process is not limited to this, and any other method can be used as long as it is a method of forming cracks in the film to form a high resistance state. The method is also good.

As a material for forming the conductive thin film 54,
Pd, Pt, Ru, Ag, Au, Ti, In, Cu, C
metals such as r, Fe, Zn, Sn, Ta, W, Pb, Pd
Oxides such as O, SnO ₂ , In ₂ O ₃ , PbO, Sb ₂ O ₃ , HfB ₂ , ZrB ₂ , LaB ₆ , CeB ₆ , YB
_4, GdB boride such as _{4, TiC, ZrC, HfC,} T
carbides such as aC, SiC, WC, TiN, ZrN, Hf
It can be appropriately selected from nitrides such as N, semiconductors such as Si and Ge, and carbon.

The above-mentioned fine particle film is a film in which a plurality of fine particles are aggregated, and the fine structure thereof is a state in which the fine particles are individually dispersed and arranged, or a state in which the fine particles are adjacent to each other or overlap each other. The latter state also includes the case where some fine particles are aggregated to form an island structure as a whole. The particle size of the fine particles ranges from several [Å] to 1 [μm],
It is preferably in the range of 10 [Å] to 200 [Å].

The electron emitting portion 55 is composed of a crack having a high resistance formed in a part of the conductive thin film 54, and the film thickness, film quality, material of the conductive thin film 54, and a forming treatment method such as energization forming which will be described later. Etc. The inside of the electron emitting portion 55 may contain conductive fine particles having a particle diameter of 1000 [Å] or less. The conductive fine particles contain some or all of the elements of the material forming the conductive thin film 54. The electron emitting portion 55 and the conductive thin film 54 in the vicinity thereof may contain carbon or a carbon compound.

[2] Vertical type surface conduction electron-emitting device A vertical type surface conduction electron-emitting device will be described.

FIG. 6 is a sectional view showing the structure of a vertical surface conduction electron-emitting device according to the present invention. 6, the same parts as those shown in FIG. 5 are designated by the same reference numerals as those in FIG.

The vertical surface conduction electron-emitting device shown in FIG. 6 comprises a step forming portion 61, a substrate 51, device electrodes 52 and 53, a conductive thin film 54, and an electron emitting portion 55. Has become. Except for the step forming portion 61,
It can be made of the same material as the planar surface conduction electron-emitting device described with reference to FIG. Step forming portion 61
Is S formed by vacuum deposition, printing, sputtering, etc.
It can be made of an insulating material such as iO ₂ . The film thickness of the step forming portion 61 corresponds to the device electrode distance L of the flat surface conduction electron-emitting device described above, and can be set in the range of several hundred [Å] to several tens [μm]. This film thickness can be set in consideration of the manufacturing method of the step forming portion and the voltage applied between the element electrodes, but is preferably in the range of several thousand [Å] to several [μm].

The conductive thin film 54 is used for the device electrodes 52 and 5
3 and the step forming portion 61, the device electrodes 52, 5
3 is stacked on top. In FIG. 6, the electron emission portion 55
Is formed in the step forming portion 61, but the shape and the position are not limited to this, but depend on the forming conditions, forming conditions, and the like.

There are various methods for manufacturing the above-mentioned surface conduction electron-emitting device. FIG. 7 is a schematic view showing a method for manufacturing a flat surface conduction electron-emitting device according to the present invention.

Hereinafter, an example of a method for manufacturing the flat surface conduction electron-emitting device will be described with reference to FIGS. 5 and 7. In FIG. 7, the same parts as those shown in FIG. 5 are designated by the same reference numerals as those in FIG.

(1) As shown in FIG. 7A, the substrate 51
Thoroughly clean with a detergent, pure water, organic solvent, etc.
After depositing an element electrode material (not shown) by a vacuum vapor deposition method, a sputtering method or the like, the element electrodes 52 and 53 are formed on the substrate 51 by using a photolithography technique or the like.

(2) As shown in FIG. 7B, an organic metal solution is applied to the substrate 51 provided with the device electrodes 52 and 53 to form an organic metal thin film (not shown). As the organic metal solution, it is possible to use a solution of an organic metal compound whose main element is the metal used for the material of the conductive thin film 54 described with reference to FIG. The organic metal thin film is heated and baked, and is patterned by lift-off, etching or the like to form the conductive thin film 54.

Although the method of forming the conductive thin film 54 has been described by taking the method of applying the organic metal solution, the method of forming the conductive thin film 54 is not limited to this, and the vacuum evaporation method, the sputtering method, the chemical vapor deposition method, and the dispersion coating method are used. The dipping method, the spinner method and the like can be used.

(3) As shown in FIG. 7C, the conductive thin film 54 is subjected to a forming process to form an electron emitting portion 55.

As an example of this forming processing method,
A method using the energization process will be described. When electricity is applied between the device electrodes 52 and 53 by using a power source (not shown), an electron emitting portion 55 having a changed structure is formed in a part of the conductive thin film 54. By carrying out the energization forming in this manner, a portion of which the structure is locally changed due to breakage, deformation, alteration or the like is formed in the conductive thin film 54. This portion becomes the electron emitting portion 55.

FIG. 8 is a diagram showing voltage waveforms in the energization forming process used for manufacturing the surface conduction electron-emitting device according to the present invention.

The voltage waveform is preferably a pulse waveform. For this, the method shown in FIG. 8 (a) in which a pulse having a pulse peak value of a constant voltage is continuously applied, and the method shown in FIG. 8 (b) in which a voltage pulse is applied while increasing the pulse peak value. There is.

In FIG. 8A, T1 and T2 are the pulse width and pulse interval of the voltage waveform. Usually, T1 is 1 [μs] to 10 [ms], and T2 is 10 [μs] to 10 [ms].
It can be set within the range of 0 [ms]. The peak value of the triangular wave (peak voltage during energization forming) can be appropriately selected according to the form of the surface conduction electron-emitting device. Under such conditions, for example, a voltage is applied for several seconds to several tens of minutes. The pulse waveform is not limited to the triangular wave, and a desired waveform such as a rectangular wave can be adopted.

T1 and T2 in FIG. 8 (b) are the pulse width and pulse interval of the voltage waveform, as in FIG. 8 (a). The peak value of the triangular wave (peak voltage during energization forming) is increased by, for example, about 0.1 [V] step.

The end of the energization forming process can be detected by applying a voltage that does not locally break or deform the conductive thin film 54 during the pulse interval T2 and measure the current. For example, by measuring the element current flowing by applying a voltage of about 0.1 [V], the resistance value of the element is calculated,
When the resistance value is [MΩ] or more, the energization forming is terminated.

(4) It is preferable to perform activation processing on the element which has finished forming. By performing the activation process, the device current If and the emission current Ie are significantly changed.

The activation treatment can be carried out by repeating the application of the pulse in the same manner as the energization forming in the atmosphere containing the gas of the organic substance. This atmosphere can be formed by using the organic gas remaining in the atmosphere when the inside of the vacuum container is evacuated using an oil diffusion pump, a rotary pump, or the like. Alternatively, it can also be obtained by introducing a gas of an appropriate organic substance into a vacuum that has been sufficiently evacuated by an ion pump or the like. The preferable gas pressure of the organic substance at this time is the shape of the vacuum container,
Since it varies depending on the type of organic substance, it can be appropriately set depending on the case. Suitable organic substances include alkanes, alkenes, alkyne aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, aldehydes, ketones, amines, phenols, carboxylic acids, organic acids such as sulfonic acids, and the like. Can be mentioned. Specifically, methane, ethane, C _n H _{2n + 2} saturated hydrocarbons expressed by general formula, ethylene, C _n H _2n unsaturated hydrocarbon expressed by a composition formula of propylene such as propane, Benzene, toluene, methanol, ethanol, formaldehyde, acetaldehyde, acetone, methyl ethyl ketone, methyl amine, ethyl amine, phenol, formic acid, acetic acid, propionic acid and the like can be used. By this treatment, carbon or a carbon compound is deposited on the device from the organic substance existing in the atmosphere, and the device current If and the emission current Ie are significantly changed.

The completion of the activation process is determined while measuring the device current If and the emission current Ie. The pulse width,
The pulse interval, pulse peak value, etc. can be set appropriately.

As carbon or a carbon compound, HOPG (Hig) which is graphite having an almost perfect crystal structure is used.
hly Oriented Pyrolytic Gr
aPGite), PG (Pyrolyt), which is graphite with a crystal grain of about 200 [Å] and a slightly disordered crystal structure.
ic Graphite), and graphite such as GC (Glassy Carbon), which is a graphite having a crystal grain of about 20 [Å] and further disordered crystal structure. These are amorphous carbons which are carbons containing amorphous carbon and a mixture of amorphous carbon and the above-mentioned graphite microcrystals,
The film thickness is preferably 500 [Å] or less, and is 30
It is more preferably 0 [Å] or less.

(5) The electron-emitting device obtained through the activation process is preferably subjected to a stabilization treatment. In this process, the partial pressure of the organic substance in the vacuum container is 1 × 10 ⁻⁸ [tor].
r] or less, preferably 1 × 10 ⁻¹⁰ [torr] or less. The pressure in the vacuum container is 1 × 10 ^-6.5 ~ 1
× 10 ^-7 [torr] is preferable, and 1 × 10 ^-8 [t] is particularly preferable.
orr] or less is preferable. It is preferable to use a vacuum exhaust device that does not use oil so that the oil generated from the device does not affect the characteristics of the element. Specifically, a vacuum exhaust device such as a sorption pump and an ion pump can be used. Further, when the inside of the vacuum container is evacuated, it is preferable to heat the entire vacuum container so that the organic substance molecules adsorbed on the inner wall of the vacuum container and the electron-emitting device can be easily exhausted. The vacuum evacuation condition in the heated state at this time is preferably 80 to 200 ° C. for 5 hours or more, but is not particularly limited to this condition, and changes depending on various conditions such as the size and shape of the vacuum container and the configuration of the electron-emitting device. To do. The partial pressure of the organic substance is measured by measuring the partial pressure of an organic molecule having a mass number of 10 to 200 and having carbon and hydrogen as main components by a mass spectrometer and integrating the partial pressures. Ask.

The atmosphere during driving after the stabilization process is
It is preferable to maintain the atmosphere at the end of the above-mentioned stabilization treatment, but it is not limited to this, and as long as the organic substance is sufficiently removed, even if the degree of vacuum itself is slightly reduced, sufficiently stable characteristics are maintained. be able to.

By adopting such a vacuum atmosphere, the deposition of new carbon or carbon compound can be suppressed, and as a result, the device current If and the emission current Ie are stabilized.

Various arrangements of electron-emitting devices can be adopted.

One example is a ladder type arrangement. This is because a plurality of rows of electron-emitting devices connected in parallel are arranged (this is referred to as an array in the row direction), and are arranged above the electron-emitting devices in a column direction orthogonal to the array in the row direction. The control electrode (grid) controls and drives electrons from the electron-emitting device.

Apart from this, there is a simple matrix type arrangement. This is because a plurality of electron-emitting devices are arranged in a matrix in the X and Y directions, one electrode of the plurality of electron-emitting devices arranged in the same row is commonly connected to a wiring in the X direction, and the same column is used. The other electrodes of the arranged electron-emitting devices are commonly connected to the wiring in the Y direction.

[A] Electron Source Substrate of Simple Matrix Type First, the electron source substrate of simple matrix type will be described in detail below.

FIG. 9 is a diagram showing the structure of a matrix-type electron source substrate according to the present invention, showing an electron source substrate obtained by arranging a plurality of electron-emitting devices in a matrix.

The matrix-type electron source substrate shown in FIG. 9 has an electron source substrate 91, an X-direction wiring 92, a Y-direction wiring 93, a surface conduction electron-emitting device 94, and a connection 95. Has become. Further, the surface conduction electron-emitting device 94 may be either the planar type or the vertical type described with reference to FIGS.

The X-direction wiring 92 includes Dx1, Dx2, ...
, Dxm (m is a positive integer), and can be made of a conductive metal or the like formed by a vacuum deposition method, a printing method, a sputtering method, or the like. The material, film thickness, and width of the wiring can be appropriately designed. Y-direction wiring 93
Is composed of n wirings Dy1, Dy2, ..., yn (n is a positive integer), and is formed similarly to the X-direction wiring 92. These m X-direction wirings 92 and n Y-direction wirings 9
An interlayer insulating layer (not shown) is provided between the two and 3 to electrically separate the two.

The interlayer insulating layer is formed by vacuum vapor deposition, printing, spa
SiO formed by the sputtering method _Two Etc. An example
For example, the entire surface of the substrate 91 on which the X-direction wiring 92 is formed, or
Partially form an inter-layer insulation layer in the desired shape, especially in the X direction.
Can withstand the potential difference at the intersection of the line 92 and the Y-direction wiring 93.
, The film thickness, the material, and the manufacturing method are set. X direction
The line 92 and the Y-direction wiring 93 are external terminals, respectively.
Have been pulled out.

The pair of device electrodes (not shown) constituting the surface conduction electron-emitting device 94 include m X-direction wirings 92 and n.
The Y-direction wiring 93 of the book is electrically connected to the connection 95 made of a conductive metal or the like.

The material forming the X-direction wiring 92 and the Y-direction wiring 93, the material forming the connecting wire 95, and the material forming the pair of element electrodes may be the same or may have some or all of the constituent elements. Also, each may be different. These materials are used as the device electrodes 52 and 5 described with reference to FIG.
It can be appropriately selected from the materials of No. 3, etc. When the material forming the device electrode and the wiring material are the same,
The wiring connected to the element electrode can also be called an element electrode.

A scanning signal applying means (not shown) for applying a scanning signal for selecting a row of the surface conduction electron-emitting devices 94 arranged in the X direction is connected to the X-direction wiring 92. On the other hand, the Y direction wiring 93 is connected to a modulation signal generating means (not shown) that modulates each column of the surface conduction electron-emitting devices 94 arranged in the Y direction according to an input signal. The drive voltage applied to each electron-emitting device is supplied as a difference voltage between the scanning signal and the modulation signal applied to the electron-emitting device.

In such a structure, individual elements can be selected and driven independently by using simple matrix wiring.

Regarding the image forming apparatus constituted by using the electron source substrate of the simple matrix type arrangement as shown in FIG.
This will be described with reference to FIGS. 10 to 12.

FIG. 10 is a schematic view showing the structure of the display panel of the image forming apparatus of the present invention. FIG.
It is a schematic diagram which shows the fluorescent film used in the display panel shown in FIG. FIG. 12 is a block diagram showing the configuration of a drive circuit of the image forming apparatus according to the present invention, and shows an example of a drive circuit for performing television display in accordance with an NTSC television signal.

The display panel shown in FIG. 10 has an electron source substrate 91 on which a plurality of X-direction wirings 92, Y-direction wirings 93, and surface conduction electron-emitting devices 94 are arranged, and a rear plate for fixing the electron source substrate 91. 101, a support frame 102, a face plate 106 having a fluorescent film 104 and a metal back 105 formed on the inner surface of a glass substrate 103, a rear plate 101, a support frame 102, and a face plate 1
And an outer package 108 including 06.

The support frame 102 includes a rear plate 101,
The face plate 106 is connected using frit glass or the like. The envelope 108 is 4 in the atmosphere, nitrogen, etc.
It is baked in a temperature range of 00 to 500 ° C. for 10 minutes or more and sealed.

The surface conduction electron-emitting device 94 corresponds to the electron-emitting portion 55 described with reference to FIG. X-direction wiring 9
2 and the Y-direction wiring 93 are used for the surface conduction electron-emitting
4 is connected to a pair of device electrodes.

Terminals Dx1, Dx2, ..., Dxm (m
Is a positive integer), terminals Dy1, Dy2, ..., Dyn
(N is a positive integer) and the high voltage terminal Hv are connected to an external electric circuit.

The rear plate 101 is mainly an electron source substrate 91.
Is provided for the purpose of reinforcing the strength of the electron source substrate 9
When the 1 itself has sufficient strength, the separate rear plate 101 can be dispensed with. In this case, the support frame 102 is directly sealed to the substrate 91, and the face plate 106, the support frame 102, and the substrate 91 are used to surround the envelope 108.
May be configured. On the other hand, by installing a support (not shown) called a spacer (anti-atmospheric pressure supporting member) between the face plate 106 and the rear plate 101, an envelope having sufficient strength against atmospheric pressure. 108 can also be configured.

FIG. 11 is a schematic diagram of the fluorescent film 104 shown in FIG. 10, and both FIGS. 11A and 11B show a color fluorescent film.

In the case of monochrome, the phosphor film 104 can be composed of only phosphor. In the case of a color fluorescent film, it can be composed of the black member 111 and the phosphor 112. As a method thereof, the black member 111 is formed in a shape called a black stripe, a black matrix, or the like by the arrangement of the phosphors 112. In the case of color display, the purpose of providing the black stripes, the black matrix, and the like is to make the color mixture between the respective phosphors 112 of the three primary color phosphors black so as to make the color mixture inconspicuous and to prevent external light. This is to suppress the decrease in contrast due to reflection. As the material of the black stripe, in addition to a commonly used material containing graphite as a main component, a material that transmits and reflects light little can be used.

As a method for applying the phosphor 112 to the glass substrate 103 shown in FIG. 10, a precipitation method, a printing method or the like can be adopted regardless of monochrome or color. As shown in FIG. 10, a metal back 105 is usually provided on the inner surface side of the fluorescent film 104. The purpose of providing the metal back 105 is to improve the brightness by specularly reflecting the light toward the inner surface side of the light emission of the phosphor 112 toward the face plate 106 side, and to act as an electrode for applying an electron beam acceleration voltage, This is to protect the phosphor 112 from damage due to collision of negative ions generated in the envelope 108. The metal back 105 is the fluorescent film 10.
4 can be manufactured by performing a smoothing process (filming) on the inner surface of the fluorescent film 104, and then depositing Al using vacuum deposition or the like.

The fluorescent film 10 is formed on the face plate 106.
In order to further enhance the conductivity of No. 4, a transparent electrode (not shown) on the outer surface side of the fluorescent film 104, that is, the glass substrate 103 side.
May be provided.

When sealing the envelope described with reference to FIG. 10, in the case of color, each color phosphor 112 on the phosphor film 104 and the surface conduction electron-emitting device 94 on the electron source substrate 91. It is necessary to correspond with and, and sufficient alignment is indispensable.

The image forming apparatus using the display panel shown in FIG. 10 is manufactured, for example, as follows.

The envelope 108 is evacuated through an exhaust pipe (not shown) by an oil-free exhaust device such as an ion pump or a sorption pump while being appropriately heated, as in the above-described stabilization process. 10 ^-7 [torr]
The sealing is performed after the atmosphere has a sufficiently low degree of organic substance and a degree of vacuum. A getter process may be performed to maintain the degree of vacuum after the envelope 108 is sealed. this is,
Immediately before or after sealing the envelope 108, the envelope 108 is heated by resistance heating, high-frequency heating, or the like.
In this process, a getter (not shown) arranged at a predetermined position is heated to form a vapor deposition film. The getter usually has Ba or the like as its main component, and the getter is, for example, 1
The degree of vacuum of × 10 ^-5 to 1 × 10 ^-7 [torr] is maintained.

Next, referring to FIG. 12, a display panel constructed by using an electron source of a simple matrix type is provided with NTSC.
A configuration example of a drive circuit which performs television display based on a television signal of a system will be described.

The drive circuit of the image forming apparatus shown in FIG. 12 includes an image display panel 121, a scanning circuit 122, a control circuit 123, a shift register 124, a line memory 125, a sync signal separation circuit 126, and a modulation circuit. It is configured to have a signal generator 127 and DC voltage sources Vx and Va.

The display panel 121 has terminals Dox1 and Dox.
x2, ..., Doxm (m is a positive integer), terminal Doy
, Doy2, ..., Doyn (n is a positive integer) and a high voltage terminal Hv are connected to an external electric circuit.

At terminals Dox1 to Doxm, electron sources provided in the display panel, that is, surface conduction electron-emitting device groups matrix-wired in a matrix of m rows and n columns are sequentially arranged in rows (n elements). A scanning signal for driving is applied.

A modulation signal for controlling the output electron beam of each element of the surface conduction electron-emitting devices of one row selected by this scanning signal is applied to the terminals Doy1 to Doyn.

A DC voltage of, for example, 10 [kV] is supplied from the DC voltage source Va to the high voltage terminal Hv, which is an accelerating voltage. The accelerating voltage is an electron emitted from the surface conduction electron-emitting device. Energize the beam with sufficient energy to excite the phosphor.

The scanning circuit 122 has m switching elements S1, S2, ..., Sm therein. Each of the switching elements S1 to Sm selects either the output voltage of the DC voltage source Vx or 0 [V] (ground level), and is electrically connected to the terminals Dox1 to Doxm of the display panel 121. Each switching element S1 to Sm
Operates based on the control signal Tscan output from the control circuit 123, and can be configured by combining switching elements such as FETs.

The DC voltage source Vx is the characteristic of the surface conduction electron-emitting device (electron emission threshold voltage) in FIG.
Based on the above, it is set to output a constant voltage such that the driving voltage applied to the non-scanned element is equal to or lower than the electron emission threshold voltage.

The control circuit 123 has a function of matching the operation of each part so that an appropriate display is performed based on an image signal input from the outside. The control circuit 123 generates a control signal on the basis of the synchronization signal Tsync sent from the synchronization signal separation circuit 126, and the scanning circuit 122 receives Tca.
n, Tsft to the shift register 124, and Tmry to the line memory 125.

The sync signal separation circuit 126 is a circuit for separating a sync signal component and a luminance signal component from an NTSC television signal input from the outside, and is constituted by using a general frequency separation circuit (filter) or the like. be able to. The sync signal separated by the sync signal separation circuit 126 is composed of a vertical sync signal and a horizontal sync signal, but in FIG. 12, it is shown as a Tsync signal for convenience of description. The luminance signal component of the image separated from the TV signal is
For convenience of explanation, it is shown as a DATA signal. DAT
The A signal is input to the shift register 124.

The shift register 124 serially / parallel converts the DATA signal serially input in time series for each line of the image, and operates based on the control signal Tsft sent from the control circuit 123. That is, it can be said that the control signal Tsft is the shift clock of the shift register 124. The serial / parallel converted image data for one line corresponds to drive data for n electron-emitting devices, and is output from the shift register 124 as n parallel signals Id1 to Idn.

The line memory 125 is a storage device for storing data for one line of an image only for a required time, and appropriately stores the contents of Id1 to Idn according to the control signal Tmry sent from the control circuit 123. Line memory 12
The contents stored in 5 are output as I * d1 to I * dn and input to the modulation signal generator 127.

The modulation signal generator 127 outputs the image data I *.
The signal source appropriately drives and modulates each of the surface conduction electron-emitting devices according to each of d1 to I * dn. The output signal of the modulation signal generator 127 is applied to the surface conduction electron-emitting device in the display panel 121 through the terminals Doy1 to Doyn.

The electron-emitting device according to the present invention has the following basic characteristics with respect to the emission current Ie. The occurrence of electron emission has a clear threshold voltage Vth, and electron emission occurs only when a voltage higher than Vth is applied. That is, when a voltage equal to or higher than the electron emission threshold voltage Vth is applied, the emission current changes according to the change in the voltage applied to the element. Therefore, when a pulsed voltage is applied to the device, electron emission does not occur even if a voltage equal to or lower than the electron emission threshold voltage Vth is applied, but a voltage equal to or higher than the electron emission threshold voltage Vth is applied. When applied, an electron beam is output. At this time, the intensity of the output electron beam can be controlled by changing the pulse peak value Vm. Further, by changing the pulse width Pw, it is possible to control the total amount of charges of the output electron beam.

Therefore, as the method of modulating the electron-emitting device according to the input signal, the voltage modulation method, the pulse width modulation method or the like can be adopted.

In carrying out the voltage modulation method, as the modulation signal generator 127, a circuit of a voltage modulation method for generating a voltage pulse of a constant length and appropriately modulating the crest value of the pulse according to the input data is used. Can be used.

When implementing the pulse width modulation method,
As the modulation signal generator 127, a pulse width modulation type circuit that generates a voltage pulse having a constant peak value and appropriately modulates the width of the voltage pulse according to input data can be used.

The shift register 124 and the line memory 12
The digital signal type 5 and the analog signal type 5 can be adopted. This is because the serial / parallel conversion and storage of the image signal may be performed at a predetermined speed.

When the digital signal type is used, it is necessary to convert the DATA signal, which is the output signal of the sync signal separation circuit 126, into a digital signal. For this purpose, the output portion of the sync signal separation circuit 126 is A / D converted. It is sufficient to provide a container. In this connection, the circuit used for the modulation signal generator 127 is slightly different depending on whether the output signal of the line memory 125 is a digital signal or an analog signal.

In the case of the voltage modulation method using a digital signal, a D / A conversion circuit or the like is used for the modulation signal generator 127, and an amplification circuit or the like is added if necessary. Further, in the case of a pulse width modulation method using a digital signal, the modulation signal generator 127 includes a high-speed oscillator and the like, a counter (counter) for counting the number of waves output by the oscillator, and an output value of the counter. And a comparator that compares the output value of the line memory 125 with the output value of the line memory 125. If necessary, an amplifier for amplifying the pulse-width-modulated modulation signal output from the comparator up to the drive voltage of the surface conduction electron-emitting device can be added.

In the case of the voltage modulation method using an analog signal, the modulation signal generator 127 may be an amplifier circuit using an operational amplifier or the like, and a level shift circuit or the like may be added if necessary. You can also Further, in the case of a pulse width modulation method using an analog signal, a voltage control type oscillation circuit (VCO) or the like can be adopted, and an amplifier for amplifying the voltage up to the driving voltage of the surface conduction electron-emitting device as necessary. Can also be added.

In the image display device of the present invention having such a structure, each electron-emitting device has a terminal Do outside the container.
Electrons are emitted by applying a voltage via x1 to Doxm and Doy1 to Doyn. High voltage terminal Hv
Through metal back 105 or transparent electrode (not shown)
To apply a high voltage to accelerate the electron beam. The accelerated electrons collide with the fluorescent film 104 and emit light to form an image.

The configuration of the image forming apparatus described here is an example, and various modifications can be made based on the technical idea of the present invention. Although the NTSC system is mentioned as the input signal, the input signal is not limited to this, and the PAL, SECAM system, etc., and a TV signal system such as a high-definition TV such as the MUSE system, which is composed of a larger number of scanning lines than this. Can also be adopted.

[B] Ladder Arrangement Electron Source Substrate Next, a ladder type electron source and an image forming apparatus will be described with reference to FIG.
3 and FIG. 14.

FIG. 13 is a schematic diagram showing a ladder type electron source substrate in the present invention.

The ladder-shaped electron source substrate shown in FIG. 13 includes an electron source substrate 130 and a plurality of electron-emitting devices 131.
And a common wiring 132. In addition, the common wiring 132 connects the plurality of electron-emitting devices 131 by the plurality of wirings Dx1 to Dx10.

The electron-emitting device 131 is formed on the substrate 130 by
A plurality of elements are arranged in parallel in the X direction, which is called an element row. A plurality of these element rows are arranged to form an electron source. By applying a drive voltage between the common wires of each element row, each element row can be driven independently. That is, a voltage equal to or higher than the electron emission threshold value is applied to the element row where the electron beam is desired to be emitted, and a voltage equal to or lower than the electron emission threshold value is applied to the element row which does not emit the electron beam. For the common wirings Dx2 to Dx9 between the element rows, for example, Dx2 and Dx3 can be the same wiring.

FIG. 14 is a schematic diagram showing the structure of a display panel of an image forming apparatus equipped with the electron source substrate shown in FIG. 14, the same parts as those shown in FIGS. 10 and 13 are designated by the same reference numerals as those in FIGS. 10 and 13.

The display panel of the image forming apparatus shown in FIG. 14 has an electron source substrate 1 in which the fluorescent film 104, the face plate 106, and the common wiring between the respective element rows are the same wiring.
30, electron-emitting device 131, and grid electrode 140
, An opening 141 through which electrons pass, Dox1, Dox
2, ..., Doxm external terminals 142, and G1, G2, ... Connected to the grid electrode 140.
, Gn and the external terminals 143 (hereinafter referred to as grid external terminals) 143.

A major difference between the ladder type image forming apparatus shown in FIG. 14 and the simple matrix type image forming apparatus shown in FIG. 10 is that the grid electrode 140 is provided between the electron source substrate 130 and the face plate 106. It is whether or not it has.

In FIG. 14, a grid electrode 140 is provided between the electron source substrate 130 and the face plate 106. The grid electrode 140 modulates the electron beam emitted from the surface conduction electron-emitting device 131. A circular opening 141 is formed in the stripe-shaped grid electrode 140 that is provided orthogonally to the ladder-shaped element rows.
However, one is provided on the upper side of each of the electron-emitting devices 131 that pass the electron beam. The shape and installation position of the grid electrode 140 are not limited to those shown in FIG. For example, a large number of through holes may be provided as openings as meshes, and the grid electrode 140 may be provided around or in the vicinity of the surface conduction electron-emitting device 131.

The outside-container terminal 142 and the grid outside-container terminal 143 are electrically connected to a control circuit (not shown).

In the image forming apparatus shown in FIG. 14,
In synchronization with sequentially driving (scanning) the element rows one column at a time,
A modulation signal for one image line is simultaneously applied to the columns of the grid electrodes 140. This makes it possible to control the irradiation of each electron beam to the phosphor and display an image line by line.

The image forming apparatus of the present invention can be applied not only to a display apparatus for television broadcasting, a video conference system, a display apparatus such as a computer, but also to an image forming apparatus as an optical printer including a photosensitive drum or the like. Can be used.

[0128]

The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

[First Embodiment] FIG. 1 is a diagram showing an image forming apparatus with a keyboard musical instrument according to the first embodiment of the present invention, and is a view best showing the features of the present invention. FIG. 1 (a)
Is a schematic view of the apparatus, and FIG. 1B is a schematic view showing an assembling method.

The image forming apparatus with a keyboard instrument shown in FIG. 1 has an image forming apparatus 1, a fixture 2, and a piano 3 which is a keyboard instrument. In addition, mounting fixture 2
Fixes the piano 3 and the image forming apparatus 1.

In the first embodiment, the image forming apparatus 1 is manufactured by using the electron source substrate of the simple matrix type having the surface conduction electron-emitting devices. In addition, mounting fixture 2
Is made of metal.

The configuration of the image forming apparatus with a keyboard instrument according to the first embodiment will be described with reference to FIG. The image forming apparatus 1 is fixed to the tip of an L-shaped fixture 2 by screwing the back surface. The fixture 2 is a piano 3
Is fixed to the back of the by screws. That is, the image forming apparatus 1 is fixed together with the fixture 2 in a structure that sandwiches the piano 3.

In the first embodiment, the height of the fixture 2 is made equal to the height of the piano 3, and the fixture 2 contacts the top plate of the piano 3. The lower part of the image forming apparatus 1 is brought into contact with the piano 3. As a result, the weight of the image forming apparatus 1 is applied to both the fixture 2 and the piano 3, and the structure can be strengthened.

[Second Embodiment] FIG. 2 is a diagram showing an image forming apparatus with a keyboard instrument according to a second embodiment of the present invention. FIG. 2 (a) is a schematic view of the apparatus and FIG. b) is a schematic view showing an assembling method.

The image forming apparatus with a keyboard instrument shown in FIG. 2 has an image forming apparatus 1, a fixture 22, and an organ 23 which is a keyboard instrument. Further, the fixture 22 fixes the organ 23 and the image forming apparatus 1.

In the second embodiment, the image forming apparatus 1 is manufactured using a ladder-type electron source substrate having surface conduction electron-emitting devices. The fixture 22 is made of metal.

The configuration of the image forming apparatus with a keyboard instrument according to the second embodiment will be described with reference to FIG. The image forming apparatus 1 is inserted into a frame-shaped mounting tool 22, and the side surface is fixed with screws. The fixture 22 is fixed to the rear surface of the organ 23 with screws.

In the second embodiment, the fixture 22 is fixed to the rear surface of the organ 23, but the fixing position is not limited to this and may be fixed to the side surface of the organ 23. Although the image forming apparatus 1 is not directly fixed to the organ 23, both the image forming apparatus 1 and the fixture 22 may be fixed to the organ 23.

[Third Embodiment] FIG. 3 is a diagram showing an image forming apparatus with a keyboard instrument according to a third embodiment of the present invention. FIG. 3 (a) is a schematic view of the apparatus and FIG. b) is a schematic view showing an assembling method.

The image forming apparatus with a keyboard instrument shown in FIG. 3 comprises an image forming apparatus 1, a fixture 32, and a piano 33 which is a keyboard instrument. Further, the fixture 32 fixes the piano 33 and the image forming apparatus 1.

In the third embodiment, the image forming apparatus 1 is manufactured by using the gas discharge type image forming apparatus. The fixture 32 is made of wood.

A method of manufacturing the gas discharge type image forming apparatus (not shown) will be briefly described below.

First, a discharge electrode for generating discharge plasma is arranged on a glass rear plate. Next, an extraction electrode for extracting electrons from the discharge plasma is arranged. The extraction electrode is made of a metal plate having a large number of regular through holes. Further, a control electrode composed of a band-shaped electrode group attached to the plate-shaped insulating base is arranged. The control electrode has a through hole coaxial with the through hole on the electron extraction electrode,
It is designed so that it does not prevent the electrons from going straight.

After that, a glass face plate provided with a fluorescent film is arranged so as to face the extraction electrode formed on the rear plate in parallel, and the glass face plate is placed between the face plate and the rear plate. Sandwich the support frame,
The face plate, the rear plate, and the support frame are sealed with frit glass.

After sealing and sealing, the inside of the image forming apparatus is evacuated and a rare gas having a low atmospheric pressure is filled therein to manufacture a gas discharge type image forming apparatus.

The configuration of the image forming apparatus with a keyboard instrument according to the third embodiment will be described with reference to FIG.

In the third embodiment, a recess for mounting the image forming apparatus 1 is provided on the piano 33. The image forming apparatus 1 is positioned in a recess provided on the piano 33, and the left and right frames are fixed by an L-shaped fixture 32. Attach the fixture 32 to the piano 33
Screws are used when fixing to.

In the third embodiment, a structure in which the piano 33 is provided with a recess and the image forming apparatus 1 is incorporated is used. However, the mounting method is not limited to this, and the surface is mounted without providing the recess. May be. Further, when fixing the image forming apparatus 1 to the piano 33, the left and right frames of the image forming apparatus 1 are pressed,
You can do it by pressing the top and bottom of the frame,
Furthermore, you may hold down all the peripheral parts.

[Fourth Embodiment] FIG. 4 is a diagram showing an image forming apparatus with a keyboard instrument according to a fourth embodiment of the present invention. FIG. 4A is a schematic view of the apparatus. (B) is an enlarged view of the image forming apparatus 1 and the fixture 42.

The image forming apparatus with a keyboard instrument shown in FIG. 4 has an image forming apparatus 1, a fixture 42, and a piano 43 which is a keyboard instrument. In addition, the fixture 42 fixes the piano 43 and the image forming apparatus 1.

In the fourth embodiment, the image forming apparatus 1 having a liquid crystal is used. Further, the attachment 42 has a rotation mechanism.

The configuration of the image forming apparatus with a keyboard instrument in the fourth embodiment will be described with reference to FIG.

In the fourth embodiment, the image forming apparatus 1
The piano 43 and the piano 43 are fixed via a fixture 42 having a rotation mechanism. The fixture 42 has a piano 43 in the fixed portion.
It is connected to the upper side, and the rotation mechanism portion is connected to the lower surface of the image forming apparatus 1.

In the fourth embodiment, since the fixture 42 has the rotating mechanism, the image forming apparatus 1 can be tilted to the keyboard side, and the display surface of the image forming apparatus 1 is protected when not in use. be able to.

In the first to fourth embodiments, the piano or organ is used as the keyboard musical instrument, but the keyboard musical instrument is not limited to this, and other musical instruments such as an electric tone may be used.

[0156]

As described above, the present invention has the following effects.

By integrating the image forming apparatus with a heavy weight keyboard instrument such as a piano, the image forming apparatus can be installed in a stable manner even if the image forming apparatus is large and the weight increases.

Also, by installing the image forming apparatus with good stability, it is possible to prevent the display (display panel) from falling over and to improve the safety.

Further, by integrating the image forming apparatus with the keyboard instrument, there is an effect that the installation place can be reduced.

From the above, when installing a large-sized image forming apparatus, there is an effect that the installation conditions such as installation site and installation method are not limited due to the increase in weight.

[Brief description of drawings]

FIG. 1 is a diagram showing an image forming apparatus with a keyboard instrument according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an image forming apparatus with a keyboard instrument according to a second embodiment of the present invention.

FIG. 3 is a diagram showing an image forming apparatus with a keyboard instrument according to a third embodiment of the present invention.

FIG. 4 is a diagram showing an image forming apparatus with a keyboard instrument according to a fourth embodiment of the present invention.

FIG. 5 is a schematic diagram showing a configuration of a planar surface conduction electron-emitting device according to the present invention.

FIG. 6 is a sectional view showing the structure of a vertical surface conduction electron-emitting device according to the present invention.

FIG. 7 is a schematic diagram showing a method for manufacturing a planar surface conduction electron-emitting device according to the present invention.

FIG. 8 is a diagram showing voltage waveforms in an energization forming process used for manufacturing a surface conduction electron-emitting device according to the present invention.

FIG. 9 is a schematic diagram showing a matrix type electron source substrate of the present invention.

FIG. 10 is a schematic diagram showing a structure of a display panel of the image forming apparatus according to the present invention.

11 is a schematic diagram showing a fluorescent film used in the display panel shown in FIG.

FIG. 12 is a block diagram showing a configuration of a drive circuit of the image forming apparatus according to the present invention.

FIG. 13 is a schematic diagram showing a ladder-type electron source substrate according to the present invention.

14 is a schematic diagram showing the structure of a display panel of an image forming apparatus including the electron source substrate shown in FIG.

FIG. 15 is a schematic diagram showing a configuration of a surface conduction electron-emitting device in a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2, 22, 32, 42 Fixture 3, 33, 43 Piano 23 Organ 51 Substrate 52, 53 Element electrode 54 Conductive thin film 55 Electron emission part 61 Step difference formation part 91 Electron source substrate 92 X direction wiring 93 Y Directional wiring 94 Surface conduction electron-emitting device 95 Connection 101 Rear plate 102 Support frame 103 Glass substrate 104 Fluorescent film 105 Metal back 106 Face plate 108 Envelope 111 Black member 112 Phosphor 121 Display panel 122 Scanning circuit 123 Control circuit 124 Shift Register 125 Line memory 126 Synchronous signal separation circuit 127 Modulation signal generator 130 Electron source substrate 131 Electron emission element 132 Common wiring (Dx1 to Dx10) 140 Grid electrode 141 Opening 142 Outer container terminals (Dox1, Dox2, ...
Doxm) 143 Grid container external terminals (G1, G2, ...
Gn) Vx, Va DC voltage source

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location G10H 1/32 G10H 1/32 Z

Claims (9)

[Claims] 1. A rear plate, a face plate that includes an image forming member and is disposed to face the rear plate, and a support frame that is disposed between the face plate and the rear plate. An image forming apparatus with a keyboard musical instrument, comprising: an image forming apparatus having a display panel; a keyboard musical instrument that emits a sound by hitting a keyboard; and an image forming apparatus and a fixture for fixing the keyboard musical instrument. 2. The image forming apparatus, the keyboard instrument,
The image forming apparatus with a keyboard instrument according to claim 1, wherein the fixture is fixed to each other. 3. The image forming apparatus with a keyboard instrument according to claim 1, wherein the image forming apparatus is fixed to the keyboard instrument via the fixture. 4. The image forming apparatus with a keyboard instrument according to claim 1, wherein the keyboard instrument comprises a piano. 5. The image forming apparatus with a keyboard instrument according to claim 1, wherein the keyboard instrument comprises an organ. 6. The image forming apparatus with a keyboard instrument according to claim 1, wherein the keyboard instrument comprises an Electone (registered trademark). 7. The image with keyboard instrument according to claim 1, wherein the display panel includes a sealed container in which the rear plate, the face plate, and the support frame are sealed. Forming equipment. 8. The image forming apparatus with a keyboard instrument according to claim 1, wherein the rear plate includes an electron-emitting device. 9. The image forming apparatus with a keyboard instrument according to claim 1, wherein the electron-emitting device comprises a surface conduction electron-emitting device.