JP3055594U - Discharge tube and lighting device thereof - Google Patents

Abstract

(57) [Problem] Discharge that does not require a starter for start-up or a ballast for current limitation after start-up, has no temperature rise, and can extend product life in use. Providing tubes. SOLUTION: An input connection plug 10 and an output connection plug 11 are provided at both ends of a light tube main body 2, respectively, and a ceramic piezoelectric element 131 is used inside the light tube adjacent to the input connection plug 10. The booster 13 is enclosed and arranged. The input terminals 134 and 135 of the booster 13 are connected to the input connection plug 10, while the output terminal 1 of the booster 13 is connected.
32 is connected to the discharge electrode 133a, and a conductive terminal 15 is provided on an output connection plug.
And a conductive layer 12 provided on the outer wall of the lamp body 2 to electrically connect the input connection plug 10 and the output connection plug 11.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a discharge tube having a booster and a lighting device therefor.

[0002]

[Prior art]

 FIG. 5 is a perspective view of a conventional fluorescent lamp 50. A mercury vapor and a small amount of argon are sealed in the elongated glass tube 51, and a fluorescent powder 52 is applied to the inner wall of the glass tube 51. At both ends of the glass tube 51, filaments 54 54 are respectively attached. Calcium oxide or barium oxide is applied on the filaments 54 to increase the radiation capability of the filaments 54. The filaments 54, 54 also serve as electrodes, and are connected to connection terminals 55, 55 projecting from both end surfaces of the bases 53, 53, respectively.

When a high voltage is applied to the filaments 53 at both ends, a large amount of electrons are emitted from the cathode toward the anode, and the emitted electrons collide with gas atoms to release gas atoms. The speed of the electrons reaches a certain limit and discharge begins. Ultraviolet rays are emitted from the liberated gas atoms, and the ultraviolet rays are absorbed by the phosphor to excite the phosphor, and the excited phosphor generates visible light.

In order to turn on a fluorescent lamp, a high voltage is applied to the filaments at both ends, so that a starter for starting is required. After startup, a ballast is required to limit the discharge current so that the fluorescent lamp will not be destroyed by the increase in discharge current.

[0005] Further, in a fluorescent lamp, as the lighting time elapses, the electrode material is consumed due to the deterioration of the phosphor and the scattering of the electrode material, and both ends of the tube wall are blackened and discharge is impossible.

[0006]

[Problems to be solved by the invention]

 The purpose of the present invention is to provide a discharge tube that does not require a separate starter for starting and a ballast for limiting current after starting, does not raise the temperature, and can extend the product life in use. To provide.

[0007]

[Means for Solving the Problems]

 The discharge tube according to claim 1, wherein an input connection plug and an output connection plug are provided at both ends of the lamp tube body, and a ceramic piezoelectric element is provided inside the lamp tube adjacent to the input connection plug. And the input terminal of the booster is connected to the input connection plug, while the output terminal of the booster is connected to the discharge electrode, and the output connection plug is connected to the output connection plug. A conductive terminal is provided, a conductive electrode is connected to the conductive terminal inside the lamp tube, and a conductive layer is provided on an outer wall of the lamp body to electrically connect the input connection plug and the output connection plug. It is characterized by being connected.

A discharge tube according to a second aspect is the discharge tube according to the first aspect, wherein the inside of the lamp is a vacuum.

A discharge tube according to a third aspect is the discharge tube according to the first aspect, wherein the discharge electrode and the conductive electrode are disposed to face each other, each of the two is branched into two branches, and each end is connected to each other. Are formed to extend in directions facing each other.

A fourth aspect of the present invention is the discharge tube according to the first aspect, wherein the conductive layer is made of a light-transmitting material.

According to a fifth aspect of the present invention, in the discharge tube according to the first aspect, the conductive layer is a stacked layer of tin halide.

The discharge tube according to claim 6 is the discharge tube according to claim 1, wherein the conductive layer is a conductive printing ink.

According to a seventh aspect of the present invention, in the discharge tube according to the first aspect, the conductive layer is a conductive wire.

According to an eighth aspect of the present invention, there is provided a lighting device for a discharge tube, wherein a power supply and a connection plug for inputting the discharge tube according to the first aspect are connected via a control IC. A high voltage is supplied at the start of the discharge tube, and a low voltage is supplied after the discharge tube is started.

[0015]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a discharge tube according to the embodiment. As shown in FIG. 1, the discharge tube 1 is provided with bases 8 and 9 at both ends of a tubular lamp body 2, and an input connection formed of protruding pins on an end face of the base 8. Plugs 10, 10 are provided, and an output connection plug 11 (not shown) is also provided on the end face of the base 9, which is also formed of a protruding pin.

The interior of the lamp body 2 is evacuated, and a booster 13 using a ceramic piezoelectric element 131 is enclosed and arranged inside the lamp body 2 adjacent to the input connection plug 10. The input terminals 134 and 135 of the booster 13 are connected to the input connection plugs 10 and 10, respectively, while the output terminal 132 of the booster 13 is connected to the discharge electrode 133a. A conductive terminal 15 is provided on the output connection plug 11, and a conductive electrode 133 b is connected to the conductive terminal 15 inside the lamp body 2.

A conductive layer 12 for electrically connecting the input connection plug 10 and the output connection plug 11 is provided on the outer wall of the lamp body 2. The conductive layer 15 can be formed of a transparent or translucent material. For example, tin halide is spray-heated and laminated. The conductive layer 15 is not limited to a light-transmitting material, but may be a conductive printing ink or a single conductive wire.

The booster 13 using the ceramic piezoelectric element 131 is a transformer of a type that converts electric energy into vibration energy on the primary side and converts vibration energy back into electric energy on the secondary side. The piezoelectric element vibrates by applying a voltage to the primary side, and a voltage corresponding to the vibration of the piezoelectric element is output from the secondary side.

As shown in FIG. 3, an input terminal of the ceramic piezoelectric element 131 is represented by IN. An upward arrow on the input terminal side of the ceramic piezoelectric element 131 indicates generation of vibration due to an applied voltage. The output terminal of the ceramic piezoelectric element 131 is represented by OUT. The right-pointing arrow on the output terminal side of the ceramic piezoelectric element 131 indicates a voltage generated by the vibration.

The voltage at the output terminal OUT of the ceramic piezoelectric element 131 determines the resonance point of the resonance cycle by a combination of different types of ceramics. It is controlled by a piece and is used for selecting the oscillation frequency, for example, from 12V to 110V or 220V, and controls the parameters related to the voltage and current. In the experiment, assuming that the efficiency of a general solenoid type transformer was 70% to 80%, the efficiency of the ceramic piezoelectric element 131 could be maintained at 95% or more.

Since the inside of the lamp body 2 is evacuated, the following points are excellent. Since the electrodes 133a and 133b are shielded from the atmosphere, they are not oxidized. Excellent discharge effect. Less disturbance of vibration. No electromagnetic or electrical interference.

Further, in the present embodiment, as shown in FIG. 1, the discharge electrode 133a and the conductive electrode 133b are arranged facing each other, each of them is branched into two branches, and their leading ends face each other. It is formed to extend in a direction facing each other. This configuration focuses the discharge. Although the case where the light tube main body 2 is cylindrical has been described, the discharge electrode and the conductive electrode are combined in an ideal discharge method according to the form in which the light tube main body is not cylindrical.

FIG. 4 is a circuit diagram showing a lighting circuit of the discharge tube 1. The power supply 20 is connected to two input terminals of the control IC 30 through the conductors La and La, respectively. The two output terminals of the control IC 30 are connected to the input connection plugs 10 of the discharge tube 1 through the conductors Lb and Lb, respectively. The output connection plug 11 of the discharge tube 1 is connected to the middle of one conductor La through the conductor Lc.

The operation of the circuit shown in FIG. 4 will be described. The power supply 20 supplies a DC or AC voltage to the control IC 30. When the discharge tube 1 is started, the control IC 30 supplies a high starting voltage to the input connection plugs 10, 10 of the discharge tube 1. The high voltage applied to the connection plugs 10, 10 is applied to the input terminals 134, 135 of the ceramic piezoelectric element 131, and accordingly, the booster 13 further increases the high voltage by the piezoelectric action, and the ceramic piezoelectric element 131 The output terminal 132 applies a boosted voltage to the discharge electrode 133a. As a result, free electrons are emitted from the discharge electrode 133a, the emitted free electrons are accelerated and emitted to the conductive electrode 133b, and discharge is started.

In the initial stage of the start of discharge, the conductive layer 12 is in a conductive state by electrically connecting the input connection plug 10 and the output connection plug 11, so that the resistance decreases. The control IC 30 supplies a low voltage to the input connection plugs 10 and 10 of the discharge tube 1 to maintain the discharge.

Since the ceramic piezoelectric element 131 is inexpensive and durable, it is possible to reduce the product cost. In addition, the ceramic piezoelectric element 131 has a specific resonance cycle, does not generate noise, and can adjust the level of the voltage, thereby controlling the brightness. Furthermore, since the operating temperature of the ceramic piezoelectric element 131 is low, there is no temperature rise even at high illuminance, and the product life can be extended in use.

[0027]

[Effect of the invention]

 According to the discharge tube of the present invention, the discharge tube is discharged with the starting voltage boosted by the piezoelectric action of the booster using the ceramic piezoelectric element. Since it is electrically connected to the output connection plug and is in a conductive state, the resistance drops to maintain discharge and control the current, so a starter for start-up and a ballast for current limiting after start-up There is no need to provide a separate device, there is no temperature rise, and the product life can be extended in use.

[Brief description of the drawings]

FIG. 1 is a perspective view of a discharge tube according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a booster and a discharge electrode of the discharge tube of FIG. 1;

FIG. 3 is a perspective view of a ceramic piezoelectric element used for a booster.

FIG. 4 is a circuit diagram of a discharge tube lighting device according to the embodiment of the present invention.

FIG. 5 is a perspective view of a conventional fluorescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge tube 2 Lamp tube main body 8 Base 9 Base 10 Connection plug 11 Connection plug 12 Conductive layer 13 Ceramic booster 14 Connection terminal 15 Conductive terminal 20 Power supply 30 Control IC 50 Fluorescent lamp 51 Glass tube 52 Fluorescent powder 53 Base 54 Filament 55 Connection Terminal 131 Ceramic piezoelectric element 132 Output terminal 133a Discharge electrode 133b Discharge electrode 134 Input terminal 135 Input terminal La lead Lb lead Lc lead

Claims (8)

[Utility model registration claims] An input connection plug and an output connection plug are provided at both ends of a lamp body, and a booster using a ceramic piezoelectric element inside the lamp tube adjacent to the input connection plug. And the input terminal of the booster is connected to the input connection plug, the output terminal of the booster is connected to a discharge electrode, and the output connection plug is provided with a conductive terminal, A conductive electrode is connected to the conductive terminal inside the lamp tube, and a conductive layer is provided on an outer wall of the lamp tube main body to electrically connect the input connection plug and the output connection plug. Discharge tube. 2. The discharge tube according to claim 1, wherein the inside of the lamp tube is vacuum. 3. The discharge electrode and the conductive electrode are disposed so as to face each other, each is branched into two branches, and each tip is formed to extend in a direction facing each other. The discharge tube according to claim 1, wherein 4. The discharge tube according to claim 1, wherein the conductive layer is made of a light-transmitting material. 5. The discharge tube according to claim 1, wherein the conductive layer is a stack of tin halide. 6. The discharge tube according to claim 1, wherein the conductive layer is a conductive printing ink. 7. The discharge tube according to claim 1, wherein the conductive layer is a conductive wire. 8. A power supply and a connection plug for inputting the discharge tube are connected via a control IC. The control IC supplies a high voltage when the discharge tube is started, and a low voltage is supplied after the discharge tube is started. The lighting device for a discharge tube according to claim 1, wherein a voltage is supplied.