JP2001338723A - Thin lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance physical the coupling strength of a thin lamp relative to a lamp holder, while not hampering the advantage of a single-action attaching and detaching operation, in a thin lighting system with a structure having the thin lamp made detachable relative to a lamp holder. SOLUTION: The thin lamp 100 consists of an anode 11, having a phosphor 10 formed on its inner surface, an electron emission cathode 12 facing it, and a translucent enclosure 13. The translucent enclosure 13 of the thin lamp 100 is engaged with a holder body 21 and an engagement cylindrical part 22 of the lamp holder 200, and the connecting terminals 14, 15 of the thin lamp 100 are connected to the feeder terminals 24, 25 of the lamp holder 200. They are fitted by a single-action operation. A magnetic body 16, attached to the translucent enclosure 13, is held strongly to a magnet 26 attached to the lamp holder 200 by magnetic attraction force. They are uncoupled with a single-action operation by using an uncoupling tool 27 having boosting action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a thin lighting device using a thin lamp.

[0002]

2. Description of the Related Art Conventionally, although it is not in the field of thin lighting devices,
Recently, as a new method of flat panel display, a field emission display (FED) has been developed.
isplay)) is gaining attention. One example is shown in FIG. 9 (“Electronics” Ohmsha 19
(See pages 6-7, September 1999).

[0003] This FED (field emission display)
Compared to a CRT (cathode ray tube) display, it is extremely thin and lightweight, and its power consumption is sufficiently low, and its breakthrough is expected as a next-generation flat panel display.

A new technology applied to this FED (Field Emission Display) is electron beam excitation light emission by field effect electron emission (Field Emission) utilizing fine processing technology. However, development of a thin-type lighting device using this new technology, which has never existed in the past, is underway.

As a prior art of such a thin lighting device, a thin lighting device having a structure in which a thin lamp is detachable from a lamp holder has been proposed. The thin lamp includes a light-transmitting envelope having a vacuum inside, an electrode structure disposed inside the light-transmitting envelope, and a light-transmitting envelope electrically connected to the electrodes. And a connection terminal extending outside. The lamp holder includes a holder body for fitting the light-transmitting envelope of the thin lamp, and a power supply terminal for making an electrical connection to a connection terminal of the thin lamp.

In mounting the thin lamp on the lamp holder, the light-transmitting envelope of the thin lamp is pushed into the main body of the lamp holder while aligning the connection terminal of the thin lamp with the power supply terminal of the lamp holder. And the connection terminal is coupled to the power supply terminal with the pushing. That is, at the same time as the electrical connection between the connection terminal and the power supply terminal, mechanical connection between the thin lamp and the lamp holder is performed.

When the thin lamp is detached from the lamp holder, it can be easily detached by applying a pulling force to the thin lamp.

In other words, such a thin illuminating device has the operational convenience that the operation can be performed almost one-touch when the thin lamp is attached to and detached from the lamp holder.

The reason why the thin lamp is made detachable with respect to the lamp holder is for maintenance of the thin lamp and the lamp holder, replacement of the lamp when the life of the thin lamp is over, etc. This is because lamps of different types are exchanged when illuminance is changed or wavelength is changed in response to a change in conditions.

[0010]

The above-mentioned prior art has the following problems.

The thin lamp emits light and irradiates the periphery when the thin lamp is energized in a state where the thin lamp is mounted on the lamp holder. In the mounted state, the thin lamp and the lamp holder are connected to each other because: As described above, only the fitting of the translucent envelope to the holder main body and the connection of the connection terminal to the power supply terminal are likely to result in insufficient physical coupling strength in the mounted state.

Depending on the specification, the electrical connection between the power supply terminal and the connection terminal is not a simple surface contact, that is, an electrical connection that does not take the form of internal / external fitting or insertion and does not involve a mechanical connection that merely makes contact. May be in the form of
In this case, the physical coupling is only the fitting between the holder main body and the translucent envelope, and thus there is a problem that the coupling strength is still insufficient.

If the physical coupling strength is insufficient, the attitude of the thin lamp with respect to the holder main body may be displaced from a normal state due to poor mounting or a change with time, particularly vibration, and if so, the power supply terminal may be displaced. The state of the electrical contact of the connection terminal is deteriorated, and there is a possibility that a contact failure may occur. When the contact failure occurs, the current supplied to the electrodes in the thin lamp tends to be insufficient, which may cause a light emission failure or an electric corrosion due to the contact failure.

Although such a problem is conspicuous when a field-effect electron emission type thin lamp is used, the problem is not necessarily limited to only such a lamp.
It is considered that the same applies to other thin lamps of different types.

The present invention has been made in order to solve the above-mentioned problems, and has an advantage of a one-touch type mounting and dismounting operation in a thin lighting device having a structure in which a thin lamp is detachable from a lamp holder. It is an object of the present invention to increase the physical bonding strength of the thin lamp to the lamp holder while not impairing it.

[0016]

The present invention solves the above-mentioned problems by taking the following means.

A thin lighting device according to the present invention is a thin lighting device in which a thin lamp is detachably mounted on a lamp holder, wherein the thin lamp is held on the lamp holder by magnetic attraction. It is characterized by having.

As is well known, the magnetic attraction force is proportional to the strength of the magnetic pole and inversely proportional to the square of the distance. The distance between the two magnetically attracted objects is sufficiently small due to the attraction. In some cases, the distance can be substantially zero. If the distance is small enough, the magnetic attraction will be very large.

According to the present invention, by holding the thin lamp in the lamp holder with such an extremely large magnetic attraction, the physical coupling strength between the two can be sufficiently increased.

Coupling by magnetic attraction utilizes a physical phenomenon called magnetic force generated in a magnetic field (magnetic field) formed in a space without a mechanical engagement element. This magnetic attraction force is different from a mechanical connection such as a screw, a crimping structure, a claw engaging structure, an adhesive or an adhesive. In the case of these mechanical couplings, the one-touch property of mounting and dismounting operations is hindered, and much time and labor is required for the work. On the other hand, in the case of the coupling utilizing the magnetic attraction force, the one-touch property of the mounting and dismounting operation does not need to be impaired.

As described above, according to the present invention, in a thin illuminating device having a structure in which a thin lamp is detachable from a lamp holder, the advantage of the one-touch type mounting and dismounting operation is not impaired. The physical bonding strength of the thin lamp to the holder can be increased.

As a result, it is possible to ensure the efficiency of workability in the mounting and dismounting operation, and it is possible to ensure that the physical bonding strength in the mounted state of the thin lamp is sufficiently large. A stable mounting state can be maintained even with respect to vibration. As a result, it is possible to provide an excellent effect that a contact failure can be prevented in a long-term use, sufficient current can be supplied, and a good lighting function can be exhibited. Further, electrical corrosion due to poor contact can be avoided.

In order to hold a thin lamp in a lamp holder with magnetic attraction, there is a mode in which a magnet is attached to the lamp holder, and a magnetic body is attached to the thin lamp corresponding to the magnet. On the contrary, there is a mode in which a magnet is attached to the thin lamp, and a magnetic body is attached to the lamp holder corresponding to the magnet. Usually, a permanent magnet is used as the magnet. As the magnetic material, iron is generally used, but nickel or chromium may be used. It should be noted that attachment of magnets to both the thin lamp and the lamp holder is not prevented. In addition, use of an electromagnet is not prevented.

The magnet emits lines of magnetic force from its north pole to the south pole to form a magnetic field around it. When a magnetic material is placed in the magnetic field, the magnetic material is magnetized by the influence of the magnetic field, that is, by magnetic induction. The above-described magnetic force acts between the magnet and the magnetized magnetic material, and the two attract and attract by the magnetic attraction force. Therefore, regardless of which of the thin lamp and the lamp holder has a magnet and which has a magnetic material, the thin lamp is strongly held by the lamp holder.

As described above, the magnetic attraction force increases as the distance decreases. It increases sharply in inverse proportion to the square of the distance. When the magnet and the magnetic body come into contact with or extremely close to each other, a very large magnetic attraction force is developed. for that reason,
When detaching a thin lamp that is magnetically attracted to the lamp holder from the lamp holder, a large detaching force is required. Therefore, as a preferred embodiment of the present invention, it is preferable that the lamp holder is provided with a detachment operation tool for detaching the thin lamp magnetically attracted to the lamp holder. As the detachment operation tool, a device with a booster mechanism, for example, a lever type is preferable. By operating the detachment operation tool when detaching the thin lamp, the detachment of the thin lamp from the lamp holder can be performed with a relatively small force in one touch, despite the large magnetic attraction force.

As a form of the lamp holder, for example,
A cable adapter system that extends the cable that is the power supply line for power supply, or a socket adapter that receives power by attaching a screw-type plug to the lamp holder and screwing the plug into the socket It may be of the type.

As the thin lamp, a flat lamp whose surface is flat and whose thickness is about a fraction of the cross dimension is preferable. The shape of the thin lamp may be circular or square. In the case of a square, it is preferable that the corners are rounded. The square may be a square or a rectangle. Alternatively, it may be elliptical.

As the thin lamp, a lamp of a field effect electron emission type is preferable. In this case, electrons can be field-emitted in a vacuum at room temperature at a relatively low voltage, and power consumption can be reduced. The temperature rise is also small. Further, it is possible to make the thickness sufficiently small to be several mm to several tens mm. However, in the present invention, the mode of the thin lamp is not limited to the field effect electron emission type.

As a field-effect electron emission type thin lamp, an anode on which a phosphor is formed, an electron emission cathode opposed to the anode, and an anode and an electron emission cathode are enclosed and sealed to form a vacuum state. It is considered that a configuration including a light-transmitting envelope described above is generally used. Regarding the translucency of the envelope, it may be colorless and transparent,
Colored and transparent (like frosted glass and common fluorescent tubes)
It may be. The electron emission cathode is also called a cold cathode.

Further, in the field-effect electron emission type thin lamp, the electron emission cathode includes an insulating substrate, ultrafine diamond particles dispersed and dispersed on the insulating substrate, and ultrafine diamond particles on the insulating substrate. A configuration including a micro emitter formed between fine particles is a very preferable embodiment.

When an electron emission cathode is formed by continuously forming an emitter film having a uniform thickness over the entire surface of the insulating substrate, the distance between the phosphor-forming anode and the electron emission cathode disposed opposite to the electron emission cathode is reduced. In this case, the intensity of the electric field formed at the same time becomes uniform. That is, considering a parallel electrode plate in which positive charges and negative charges are uniformly distributed, and assuming that the charge density on each surface is + σ, −σ (Coulomb / m ² ),
The electric field strength is E = 4πkσ (Newton / Coulomb)
However, the electric field intensity E is uniform over the entire area. The lines of electric force are perpendicular to the surface of the electrode.

Considering the necessary energy when electrons are emitted from the cathode, this is proportional to the electric field strength. If the electric field intensity is uniform, the electric field intensity per unit area of the ultra-small area becomes relatively small. When the electric field intensity per unit area is low, the emission of electrons becomes insufficient. To perform good electron emission when the electric field intensity is uniform,
The voltage applied between the anode and the cathode must be very high.

In order to promote electron emission while reducing the applied voltage, it is necessary to increase the electric field strength per unit area. That is, the number of lines of electric force passing through the unit area, that is, the electric flux density may be increased.

A simple method for that purpose will be described below (refer to FIG. 7 in the following description, reference numeral 61 for an insulating substrate, reference numeral 62 for ultrafine diamond particles, and reference numeral for a minute emitter. 63 can be referred to). The simple technique is to form a small emitter on an insulating substrate. It is preferable that the minute emitters be formed as densely as possible on the insulating substrate at the same intervals as possible. That is, a high-density arrangement of minute emitters is preferable. However, adjacent small emitters need to be in good electrical insulation. It is necessary to be in an electrically insulating state in two directions perpendicular to each other on the plane of the insulating substrate, that is, in the X direction and the Y direction. Focusing on one minute emitter, the entire periphery of the minute emitter needs to be surrounded by an insulator. In addition, for high-density arrangement, the width of the insulator is preferably as small as possible. One of the most suitable ones to satisfy such a condition is ultrafine diamond particles. Recent dramatic technological developments have made it possible to grow ultra-fine diamond particles on an insulating substrate in an ultra-high density and uniformly dispersed state. By growing diamond ultra-fine particles in a single particle state, for example, four diamond ultra-fine particles located in a square corner of two in the X direction and two in the Y direction are formed in a state of being brought into contact with adjacent ones. Accordingly, a gap surrounded by the four ultrafine diamond particles can be formed. Then, when the minute emitter is formed on the insulating substrate in the gap, the minute emitter is surrounded by ultrafine diamond particles, and a reliable insulation state is maintained between adjacent minute emitters. In other words, the ultrafine diamond particles function as an insulator between adjacent minute emitters,
It functions as a distance regulation (distant piece) of the arrangement of the matrix array of a large number of micro emitters.

As described above, an extremely large number of minute emitters can be formed on an insulating substrate with high density and uniformity. That is, it is possible to increase the electron emission site density. As a result, it is possible to obtain a small emitter having an extremely large electric field intensity per unit area as compared with a case where an emitter film having a uniform thickness is continuously formed over the entire surface of the insulating substrate.
In other words, many electric lines of force extending from the anode can be concentrated on the minute emitters instead of being uniformly dispersed.

By concentrating the lines of electric force on the minute emitter and amplifying the electric field intensity per unit area of the surface, even if the voltage applied between the anode and the cathode is relatively low, the electron Release can be facilitated. That is, the emission current density can be increased.

Accordingly, the electron emission cathode includes an insulating substrate, ultrafine diamond particles dispersed and dispersed on the insulating substrate, and fine emitters formed between the ultrafine diamond particles on the insulating substrate. With this configuration, electron emission can be effectively performed under a relatively low voltage. This makes it possible to further reduce the thickness of the thin lamp.

Further, a large amount of electrons emitted from the electron emission cathode collide with the phosphor at the anode and cause the phosphor to emit light. However, since the electron emission is extremely efficient, the illumination effect is excellent. It will be.

In the present invention, the mounting and dismounting operation of the thin lamp having such an excellent illumination function with respect to the lamp holder can be performed without impairing the function of performing one-touch operation by utilizing magnetic attraction force. The physical bonding strength in the state can be ensured to be sufficiently large.

It is preferable that the minute emitter is formed to have a sharp tip. That is, the amplification of the electric field intensity per unit area can be made more effective.

The fine emitter is preferably made of amorphous carbon. Since the conductivity is extremely high and the electron transfer performance is good, it is possible to efficiently emit electrons. Furthermore, the durability is extremely high, and a long life can be ensured even under severe use conditions.

The wavelength of light applied to the phosphor formed on the anode differs depending on the type of the phosphor. The phosphor material may be selected according to the purpose of use. The thin lighting device can be used for plant growing lighting or agricultural use. In that case, chlorophyll a (blue-green) of chloroplast
And wavelength 4 that chlorophyll b (yellow green) easily absorbs
Those near 50 nm or 680 nm are preferred. FIG. 8 shows the wavelength dependence of the light absorption rate and photosynthetic rate ("Shinpen Biological IB", page 54, Sekken Publishing Co., Ltd.
Year).

Depending on the stage of plant growth and seasonal changes,
There is a method of using it to replace a thin lamp with a different wavelength.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the thin lighting device according to the present invention will be described below in detail with reference to the drawings.

[Embodiment 1] FIG. 1 is a partially broken side view showing a structure of a thin illumination device according to Embodiment 1 in a state where a lamp is detached.

This thin lighting device has a thin lamp 100 and a lamp holder 200 as main components.
The thin lamp 100 is configured to be detachable from the lamp holder 200.

The thin lamp 100 has an anode 11 composed of a transparent electrode having a phosphor 10 coated on the inner surface thereof,
A light-transmitting envelope 13 enclosing and enclosing the anode 11 and the electron-emitting cathode 12 and having a vacuum inside, and a lead to the anode 11 and the electron-emitting cathode 12. Translucent enclosure 13 connected via a wire
And a pair of connection terminals 14 and 15 fixed to the back surface of the light-transmitting enclosure 13 and a magnetic body 16 integrally attached to a portion between the connection terminals 14 and 15 on the back surface of the translucent envelope 13. Have been. This thin lamp 100 is of a field effect electron emission type.

The lamp holder 200 holds the thin lamp 10
And a holder main body 21 made of insulating plastic, which is configured to fit the light-transmitting envelope 13 of zero, and formed integrally with the holder main body 21 in a standing state on the entire circumference on the front side. The fitting tube portion 22, the cable holding portion 23 integrally formed on the back surface of the holder body portion 21, the thin lamp 10
A pair of power supply terminals 24 and 25 for inserting the pair of connection terminals 14 and 15 for electrical connection and a thin lamp 100.
The magnet 26 made of a permanent magnet integrally attached to the front surface of the concave portion corresponding to the bottom of the fitting tube portion 22 of the holder body 21 corresponding to the position of the magnetic body 16 and the fitting tube portion 22 is rotated. It is configured as having a detaching operation tool 27 and the like freely attached. The end portion of the power cable 30 is sandwiched and held by the cable holding portion 23, and the lead wire at the distal end of the power cable 30 is connected to the power supply terminals 24 and 25. The holder body 21 is configured as a cable adapter type. The detachment operation tool 27 is of a lever type and has a boosting action. The detachment operation tool 27 is configured as an integral unit in a state in which the operation unit 27a and the operation unit 27b are in a U-shape. At the boundary between the operation section 27a and the action section 27b, the detachment operation tool 27 is pivotally connected to the holder main body 21 via a support shaft 28 so as to be rotatable. The operation unit 27a is an operation unit 27
The length is longer than b, thereby exerting a boosting action. A step 27c for engaging the tip of a driver (screwdriver) is formed at the tip of the operation section 27a.

FIGS. 2 and 3 are diagrams for explaining the shape and dimensions of the thin lamp 100. FIGS.
3 (a) is a front view, FIGS. 2 (b) and 3 (b) are side views, and FIGS. 2 (c) and 3 (c) are rear views. The shape of the thin lamp 100 may be a circle as shown in FIG. 2 or a square with rounded corners as shown in FIG. The front and back surfaces of the translucent envelope 13 are both flat and parallel to each other. As an example of the dimensional relationships, diametral dimension d _1, d ₂ of the light-transmitting envelope 13 1
00 mm, the thicknesses t ₁ and t ₂ are 25 mm, and the protrusion dimensions s ₁ and s ₂ of the connection terminals 14 and 15 are 10 mm. However, it is needless to say that such numerical values are merely examples and may be appropriately changed according to the specifications. The same applies to the shape.

The connection terminals 14 and 15 are connected to the translucent enclosure 13.
Are arranged symmetrically with respect to the center on a straight line passing through the center.

FIG. 4 is a partially broken side view showing a state where the thin lamp 100 is mounted on the lamp holder 200.
The operation of mounting the thin lamp 100 on the lamp holder 200 will be described with reference to FIGS. The pair of connection terminals 14 and 15 of the thin lamp 100 are connected to the lamp holder 2.
The translucent envelope 13 is pushed into the fitting cylinder 22 of the holder main body 21 to be fitted while being aligned with the pair of power supply terminals 24, 25 of 00. With the push-fitting, the connection terminals 14 and 15 are inserted into the power supply terminals 24 and 25 and are electrically connected. At the same time, the magnetic body 16 on the back of the translucent envelope 13 is
The thin lamp 100 is strongly and stably attached to the lamp holder 200 by the magnetic attraction force which approaches and finally comes into contact with the magnet 26 on the front surface of the concave portion of the recess and acts between the magnet 26 and the magnetic body 16. It is held and the mechanical connection is completed.
At this time, the physical bonding strength is sufficiently high. The mounting of the thin lamp 100 on the lamp holder 200 can be performed with one touch.

When a magnetic attraction force is applied between the thin lamp 100 and the lamp holder 200, the magnetic body 16 is attached to the thin lamp 100 and the magnet 26 is connected to the lamp holder 200 as in this embodiment. Instead of attaching to the 200, the magnetic body 16 may be attached to the lamp holder 200 and the magnet 26 may be attached to the thin lamp 100. In this case as well, the same effect as described above is exerted. Also, both may be magnets.

When the thin lamp 100 is pushed in and fitted, the detachment operation tool 27 is moved to the step portion 13 a of the light-transmitting envelope 13.
It escapes and rotates by receiving force from. When detaching the mounted thin lamp 100 from the lamp holder 200, the detachment operation tool 27 is operated. When a driver is engaged with the step portion 27c of the detachment operation tool 27 to apply a radially outward force to the operation portion 27a, the detachment operation device 27 rotates around the support shaft 28, and the action portion 27b becomes transparent. Optical envelope 1
The third step 13a is pushed outward in the axial direction. The action at this time is a boosting action, and the thin lamp 100 can be detached from the holder main body 21 with a relatively small operating force against a strong magnetic attraction force between the magnet 26 and the magnetic body 16. it can. The detachment of the thin lamp 100 from the lamp holder 200 can be performed with one touch.

It is preferable that the mounting position of the detachment operation tool 27 be on an extension of one straight line on which the pair of power supply terminals 24 and 25 are mounted. And one on each side of the diameter
It is preferable to provide them one by one. However, only one may be used. Alternatively, one or two detachment operation tools 27 may be arranged on a straight line orthogonal to a single straight line on which the pair of power supply terminals 24 and 25 ride. Alternatively, four detachment operation tools 27 may be provided every 90 degrees. Or 12
Three detachment operation tools 27 may be provided every 0 °.
Broadly, the number, arrangement position, and structure of the detachment operation tools 27 can be arbitrarily determined.

[Second Embodiment] FIG. 5 is a partially cutaway side view showing a structure of a thin illuminating device according to a second embodiment in a lamp detached state. The same reference numerals as those in FIG. 1 of the first embodiment denote the same components in FIG. 5 of the second embodiment, and are the same as those described above. In addition, items that have been described in the first embodiment and that are not described again in the second embodiment also apply to the second embodiment as they are, and a detailed description thereof will be omitted. The configuration of the second embodiment is different from that of the first embodiment as follows.

In the first embodiment, the lamp holder 200
Is configured as a cable adapter type, but in the case of the second embodiment, the lamp holder 200 is used.
Is configured as a socket adapter type. That is, a screw-type plug 41 is attached to the center of the back of the holder main body 21 of the lamp holder 200, and the plug 4 is inserted into a socket (not shown).
An electric power supply state is obtained by screwing 1. In view of the fact that the power supplied from the socket is 100 V or 200 V of commercial power, the holder main body 21
, An AC-DC converter 42 is mounted, the input side of the AC-DC converter 42 is connected to the plug 41, and the output side of the
25. As a result, one of the supplied alternating current
It is preferable to boost 00V or 200V to obtain a required voltage.

The other operations, functions, and effects are the same as those in the first embodiment, and a description thereof will be omitted.

[Third Embodiment] In a third embodiment, the electrical connection portion and the magnetic attraction portion are the same part.
FIG. 6 is an enlarged cross-sectional view of a main part, that is, a periphery of a connection terminal and a power supply terminal in a thin lighting device according to Embodiment 3 of the present invention. In the holder body 21, the columnar magnet 2
6 is buried, a cylindrical deep recess is formed in the center of the cylindrical magnet 26, and the power supply terminal 2 is formed in the recess.
4 is embedded, and a lead wire 29 passing through a small hole formed in the columnar magnet 26 is connected to the power supply terminal 24. A columnar magnet 26 with such a power supply terminal 24 is embedded in the holder body 21.

On the other hand, on the thin lamp 100 side, the connection terminal 14 protrudes from the rear surface of the translucent envelope 13, and a position corresponding to the cylindrical magnet 26 around the base of the connection terminal 14. In this state, the magnetic body 16 is attached to the back of the translucent envelope 13.

The same applies to the other power supply terminal 25 and connection terminal 15.

Next, a field-effect electron-emitting thin lamp 10 applicable to any of the first to third embodiments described above.
A specific example of the electron emission cathode 12 at 0 will be described. FIG. 7 is a schematic perspective view showing the structure of the electron emission cathode 12. A large number of diamond ultrafine particles 62 as ultrafine particles are densely arranged on a glass substrate 61 as an insulating substrate, and a region (site) surrounded by four diamond ultrafine particles 62, two in the X direction and two in the Y direction. A small emitter 63 made of amorphous carbon is formed on a glass substrate 61. The tip of the minute emitter 63 is sharpened.

That is, a very large number of minute emitters 6
3 are formed on the glass substrate 61 with high density and uniformity, thereby achieving a high electron emission site density. Also, many lines of electric force from the anode 11 can be concentrated on the minute emitter 63 instead of being uniformly dispersed, and even if the voltage applied between the anode and the cathode is relatively low, the electron Emission is facilitated and emission current density is increased.

Then, a large amount of electrons emitted from the minute emitter 63 in the electron emission cathode 12 collide with the phosphor 10 at the anode 11 and cause the phosphor to emit light. However, electron emission is extremely efficient. Therefore, the lighting effect is also excellent.

Further, in the present invention, the mounting and dismounting operation of the thin lamp having such an excellent lighting function with respect to the lamp holder can be performed without impairing the function of performing one-touch operation by utilizing the magnetic attraction force. The physical bonding strength in the state can be ensured to be sufficiently large.

The power supply is generally a commercial AC power supply, but a DC power supply may be used, or a battery-driven power supply may be used. The thin lighting device of the present invention may be used by being attached to a vertical wall, or may be used by being attached to a horizontal surface such as a ceiling. Also, a number of thin lighting devices may be mounted side by side in a matrix. Thereby, a large-sized thin lighting device can be constructed.

[0066]

As described above, according to the present invention, in a thin illuminating device having a structure in which a thin lamp is detachable from a lamp holder, the advantage of the one-touch type mounting and dismounting operation is not impaired. In addition, the physical bonding strength of the thin lamp to the lamp holder can be increased.
As a result, it is possible to ensure the efficiency of the workability in the mounting and dismounting operation, and it is possible to ensure that the physical bonding strength in the mounted state of the thin lamp is sufficiently large. A stable mounting state can be maintained even with respect to vibration. Eventually, it will prevent poor contact in long-term use, make the current supply sufficient,
An excellent effect that a good lighting function can be exhibited can be obtained. Further, electrical corrosion due to poor contact can be avoided.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure of a thin lighting device according to a first embodiment of the present invention, which is partially broken in a lamp detached state.

FIG. 2 is an explanatory diagram of the shape and dimensions of the thin lamp according to the first embodiment.

FIG. 3 is an explanatory diagram of another shape and dimensions of the thin lamp according to the first embodiment.

FIG. 4 is a partially broken side view showing a state where the thin lamp in the thin lighting device according to the first embodiment is mounted on the lamp holder;

FIG. 5 is a side view showing a structure of a thin lighting device according to a second embodiment of the present invention, partially broken in a lamp detached state;

FIG. 6 is an enlarged cross-sectional view of the periphery of a connection terminal and a power supply terminal in a thin lighting device according to Embodiment 3 of the present invention.

FIG. 7 is a schematic perspective view showing the structure of an electron emission cathode common to the first to third embodiments.

FIG. 8 is a characteristic diagram showing wavelength dependence of light absorption rate and photosynthetic rate.

FIG. 9 is a cross-sectional view illustrating an example of a field emission display (FED) according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Phosphor 11 ... Anode 12 ... Electron emission cathode 13 ... Translucent envelope 13 ... Step part 14, 15 ... Connection terminal 16 ... Magnetic body 21 ... Holder body part 22 ... Fitting tube portion 23 Cable holding portion 24, 25 Power supply terminal 26 Magnet 27 Detachment operation tool 28 Support shaft 30 Power cable 41 Plug 61 Glass substrate (insulating substrate) ) 62 ultrafine diamond particles 63 small emitter 100 thin lamp 200 lamp holder

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01J 63/06 H01J 63/06 H01R 13/633 H01R 13/633

Claims (14)

[Claims] 1. A thin illuminating device, wherein a thin lamp is detachably mounted on a lamp holder, and wherein the thin lamp is held on the lamp holder by magnetic attraction. 2. The thin lighting device according to claim 1, wherein a magnet is attached to the lamp holder, and a magnetic body is attached to the thin lamp corresponding to the magnet. 3. The thin illuminating device according to claim 1, wherein a magnet is attached to the thin lamp, and a magnetic body is attached to the lamp holder in a position corresponding to the magnet. 4. The lamp holder according to claim 1, wherein the lamp holder is provided with a detachment operation tool for detaching the thin lamp magnetically attracted to the lamp holder. A thin lighting device as described in Crab. 5. The thin lighting device according to claim 1, wherein the lamp holder is configured as a cable adapter type. 6. The thin lighting device according to claim 1, wherein the lamp holder is configured as a socket adapter type. 7. The thin lighting device according to claim 1, wherein the thin lamp is configured as a flat type. 8. The thin lighting device according to claim 1, wherein the thin lamp has a thickness that is a fraction of its cross dimension. 9. The thin illumination device according to claim 1, wherein the thin lamp is configured as a field-effect electron emission type lamp. 10. The thin-film lamp of the field-effect electron emission type comprises: an anode on which a phosphor is formed; an electron emission cathode disposed opposite to the anode; The thin illuminating device according to claim 9, further comprising: a light-transmitting envelope in a vacuum state. 11. The thin lamp of the field effect electron emission type, wherein the electron emission cathode has an insulating substrate, diamond ultrafine particles dispersed and arranged on the insulating substrate, and diamond ultrafine particles on the insulating substrate. The thin illuminating device according to claim 9, further comprising a minute emitter formed between the thin illuminating devices. 12. The thin illumination device according to claim 11, wherein the minute emitter is formed to have a sharp tip. 13. The method according to claim 11, wherein the minute emitter is made of amorphous carbon.
3. The thin lighting device according to 2. 14. The thin lighting device according to claim 1, wherein the lighting device is configured for plant growing illumination.