JPH03147248A - fluorescent lamp - Google Patents

Abstract

PURPOSE:To improve startability of switch lighting of each light emitting chamber of a fluorescent lamp and prevent the generation of the stray light by arranging an auxiliary anode electrode so as to face to communicating holes of the light emitting chambers and an electrode chamber and position between the communicating holes and a common cathode electrode. CONSTITUTION:When the electric feeding is performed between an anode electrode 20 of a selected light emitting chamber 17 and a common cathode electrode 25 of an electrode chamber 23 to perform a discharge through discharge communicating holes 19, a discharge between an auxiliary electrode 27 of the electrode chamber 23 and the common cathode electrode 25 is left as it is. The discharge starting voltage of the anode electrode 20 and the common cathode electrode 25 is thereby reduced, and while starting of a discharge between the anode electrode 20 and the common cathode electrode 25 becomes excellent to perform lighting of each light emitting chamber quickly. Since the auxiliary anode electrode 27 is arranged in the electrode chamber 23 which is not coated with the fluorescent film 18, the color light is not output at the time of discharge between the auxiliary anode electrode 27 and the common cathode electrode 25, and even if a discharge is performed between the auxiliary anode electrode 27 and the common cathode electrode 25 at the time of nonlighting of the anode electrode 20 of each light emitting chamber 17, the stray light is not generated.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Field of Application) The present invention is suitable for use as a display element such as a color electronic display panel or a light emitting element for decoration lighting, and is suitable for use as a light emitting element for a plurality of different colored lights. It relates to a fluorescent lamp that outputs a desired color of light by selectively discharging between an anode electrode and a common cathode arranged in a light-emitting chamber, and in particular, a single-tube multi-tube lamp that reduces the starting voltage while preventing stray light. Regarding color fluorescent lamps.

(Prior art) Conventionally, this type of single-tube multicolor fluorescent lamp has been developed, for example, by
As described in Publication No. 2-15749, an anode electrode is provided in each of a plurality of light emitting chambers each having a transparent portion formed on the front surface and covered with a fluorescent film that emits light of different colors. A fluorescent lamp in which opposing cathode common electrodes are disposed behind each of the light emitting chambers, and a desired color light is output by selectively discharging between each anode electrode and the cathode common electrode, A structure is adopted in which an auxiliary anode electrode is disposed in the electrode chamber on the side of the cathode common electrode to reduce the starting voltage of discharge between each anode electrode and the cathode common electrode.

(Problems to be Solved by the Invention) In the fluorescent lamp of the conventional structure described above, since the auxiliary anode electrode disposed in the electrode chamber is located to the side of the cathode electrode,
The discharge path between the anode electrode and the cathode electrode and the discharge path between the auxiliary anode electrode and the cathode electrode are different in discharge direction,
There was a problem in which the switching lighting of each light emitting chamber had poor startability.

The present invention has been developed in view of the above-mentioned problems. It prevents stray light, reduces the starting voltage, and improves the starting performance of switching lighting of each light-emitting chamber of a fluorescent lamp, thereby improving power and illuminance efficiency, and increasing lamp efficiency. The present invention provides a fluorescent lamp that has improved performance and does not cause color light disturbance.

[Structure of the Invention] (Means for Solving the Problems) The fluorescent lamp of the invention according to claim 1 has a light-transmitting portion formed on the front side and a front side facing the light-transmitting portion. A plurality of light-emitting chambers are partitioned off and have fluorescent films on their inner peripheral surfaces that emit light in different colors, and an electrode chamber is formed at the rear of the light-emitting chambers through communicating holes that concentrate on and communicate with each of the light-emitting chambers. In a fluorescent lamp comprising: an anode electrode disposed in each light emitting chamber, and a common cathode electrode disposed in the electrode chamber opposite to each electrode, the light emitting chamber and the electrode chamber are connected to each other. An auxiliary anode electrode is disposed opposite to the communication hole that centrally communicates with the common cathode electrode.

A fluorescent lamp according to a second aspect of the invention is the fluorescent lamp according to the first aspect, in which a common cathode electrode and an auxiliary anode electrode are introduced into the electrode chamber from the stem portion.

The fluorescent lamp according to claim 3 is the fluorescent lamp according to claim 1, in which an auxiliary anode electrode is introduced into the electrode chamber from the junction between the light emitting chamber and the electrode chamber.

(Function) In the fluorescent lamp of the invention as set forth in claim 1, when electricity is applied between the anode electrode of the light emitting chamber selected from among the light emitting chambers and the common cathode electrode disposed in the electrode chamber, the light emitting chamber of the selected light emitting chamber is heated. A discharge is generated between the anode electrode and the common cathode electrode through the respective communication holes, and the mercury atoms are excited in each light-emitting chamber, generating ultraviolet light. This color light is emitted from the transparent part. At this time, since discharge is occurring between the auxiliary anode electrode and the common cathode electrode in the electrode chamber, the discharge starting voltage between the anode electrode and the common cathode electrode in the light emitting chamber is reduced, and the auxiliary anode electrode is connected to the light emitting chamber. Because it is located between the common cathode electrode and facing the communication hole that intensively communicates with the electrode chamber,
The anode electrode of the light emitting chamber is located on the extension of the discharge path between the auxiliary anode electrode and the common cathode electrode, so that the discharge between the anode electrode of the light emitting chamber and the common cathode electrode can be started well, and the auxiliary anode electrode Since the fluorescent film is disposed in an electrode chamber to which no fluorescent film is attached, no colored light is output during discharge between the auxiliary anode electrode and the common cathode f11tiii, and no stray light is generated.

In the fluorescent lamp of the invention according to claim 2, the common cathode electrode and the auxiliary anode electrode are introduced into the electrode chamber from the stem portion, so that the common cathode electrode and the auxiliary anode electrode can be easily positioned. Manufacturability is improved.

In the fluorescent lamp of the invention according to claim 3, since the auxiliary anode electrode is introduced into the electrode chamber from the junction between the light emitting chamber and the electrode chamber,
Manufacturability is improved.

(Embodiment) The configuration of an embodiment of the present invention will be described with reference to FIGS. 1-2 of the drawings.

Reference numeral 11 denotes an envelope, which includes a rectangular cylindrical front body I2 with a substantially square front face molded from ceramic or the like, and a roughly square cylindrical front body I2 molded from glass or the like which is integrally connected to the rear part of this front body 12. It is composed of a bottomed cylindrical rear vessel body 13. The front body 12 has an opening at the front, and a light-transmitting portion 14 made of a light-transmitting material such as glass is provided in the front opening. This front body 12 has a bottom section ■ at the front.
5 and a substantially cross-shaped partition plate portion 16 protruding from the bottom surface portion 15, a plurality of light emitting chambers 17 are defined with the front side facing the light-transmitting portion 14. This partition plate portion 16 is
For example, the light emitting chambers 17 are shaped so that they intersect each other at right angles in the direction toward each peripheral part at the center of the front body 12, and are further bent at a substantially right angle in the middle part so as to face the adjacent peripheral parts. Formed into splits. Further, on the inner peripheral surface of each of the light emitting chambers 17, a fluorescent film 18 is formed to emit light of a different color, for example, red and green. Further, in the bottom part 15 of the plurality of light emitting chambers 17, a discharge communication hole 1 is located at the center of the front body 12 and extends along the partition plate part 16.
9 are formed respectively.

In addition, an anode electrode 20 is arranged in each of the light emitting chambers 17 so as to face the corner position of the front body 12, and a lead wire 21 of each anode electrode 20 passes through the bottom surface 15 of the front body 12. and are arranged along the outer circumferential surface of the rear vessel body 13.

An electrode chamber 23 is formed in the rear vessel body 13,
It has an outer diameter large enough to be inscribed in the front body 12, and a front end opening edge is bonded and fixed to the rear surface of the front body 12.

The electrode chamber 23 is centrally communicated with the plurality of light emitting chambers 17 through communication holes 19. Further, a well 26 of a common cathode electrode 25 is introduced into the electrode chamber 23 from a stem portion 24 formed at the center of the rear end of the rear vessel body 13.

Reference numeral 27 denotes an auxiliary anode electrode, which is disposed between the common cathode electrode 25 and the communication hole 19 that centrally communicates the light emitting chamber 17 and the electrode chamber 23. The well 28 of this auxiliary anode electrode 27 is connected to the rear vessel body 1.
From the stem portion 24 formed at the center of the rear end of 3 to the electrode chamber 23
has been introduced. Further, the well 28 of the auxiliary anode electrode 27 is insulated from the common cathode electrode 25 by an insulating sleeve 29 such as a glass sleeve to prevent discharge from occurring between the wells 28 and the common cathode electrode 25.

Next, the operation of this embodiment will be explained.

When electricity is applied between the anode electrode 20 of the selected light emitting chamber 17 that emits light of a desired color among the light emitting chambers 17 and the common cathode electrode 25 disposed in the electrode chamber 23, the selected light emitting chamber 17
Discharge occurs between the anode electrode 20 of the electrode chamber 23 and the common cathode electrode 25 of the electrode chamber 23 through the discharge communication hole 19, and mercury atoms are excited in each light emitting chamber 17 to generate ultraviolet rays. The fluorescent film 18 is excited to emit light of a predetermined color, and this colored light is emitted from the transparent light 8Iζ14.

At this time, by causing a discharge between the auxiliary anode electrode 27 and the common cathode electrode 25 in the electrode chamber 23, the discharge starting voltage between the anode electrode 20 and the common cathode electrode 25 in the light emitting chamber 17 is reduced, and Since the auxiliary anode electrode 27 is disposed facing the communication hole 19 that intensively communicates the light emitting chamber 17 and the electrode chamber 23 and is located between the common cathode electrode 25, the anode electrode 20 of the light emitting chamber 17 is located on the extension of the discharge path between the auxiliary anode electrode 27 and the common cathode electrode 25,
The discharge between the anode electrode 20 of the light emitting chamber 17 and the common cathode electrode 25 is started well, and each light emitting chamber 17 is quickly lit. Furthermore, since the auxiliary anode electrode 27 is disposed in the electrode chamber 23 to which the fluorescent film 18 is not attached, no colored light is output during discharge between the auxiliary anode electrode 27 and the common cathode electrode 25, and each light emitted Even if discharge occurs between the auxiliary anode electrode 27 and the common cathode electrode 25 when the anode electrode 20 of the chamber 17 is not emitting light, no stray light is generated.

Next, the configuration of another embodiment will be explained with reference to FIG. 3 of the drawings.

The structure of this embodiment differs from the structure of the previous embodiment in that the envelope 11 is made of ceramic or the like and forms a square-shaped light emitting chamber 17, and the square tubular front body 12 is made of glass or the like. The well 28 of the auxiliary anode electrode 27 is introduced into the electrode chamber 23 from the joint with the rear vessel body 13 forming a substantially cylindrical electrode chamber 23 with a bottom. The common cathode electrode 27 is located between the common cathode electrode 27 and the common cathode electrode 27, facing the communication hole 19 through which the electrode chamber 23 and the electrode chamber 23 are centrally communicated. And this auxiliary anode electrode 2
The well 28 of No. 7 is insulated from the common cathode electrode 25 by an insulating sleeve 29 such as a glass sleeve to prevent discharge from occurring between the wells 28 and the common cathode electrode 25.

In this embodiment, as in the previous embodiment, the discharge between the auxiliary anode electrode 27 and the common cathode electrode 25 in the electrode chamber 23 causes the anode electrode 20 and the common cathode electrode 25 in the light emitting chamber 17 to
The discharge starting voltage between the light-emitting chambers 17 and the common cathode electrode 20 is reduced, and the discharge between the anode electrode 20 and the common cathode electrode 25 of the light-emitting chambers 17 is better started, and each light-emitting chamber 17 is quickly lit. Furthermore, no colored light is output between the auxiliary anode electrode 27 and the common cathode electrode 25 during discharge, and the anode electrode 27 of each light emitting chamber 17
Even if discharge occurs between the auxiliary anode electrode 27 and the common cathode electrode 25 when no light is emitted, stray light will not occur.

In addition, in the configuration of this embodiment, the light emitting chamber 17 and the electrical appliance chamber 23
In order to introduce the auxiliary anode electrode 27 into the electrode chamber 23 from the junction with the electrode chamber 23, the electrode chamber 2
3, a well 28 of the auxiliary anode electrode 27 can be introduced.

〔Effect of the invention〕

According to the invention as set forth in claim 1, a light-emitting chamber having a translucent portion formed on the front side and covered with a fluorescent film that emits light in different colors, and a light-emitting chamber concentrated in each light-emitting chamber behind the light-emitting chamber. It has an electrode chamber formed through a communicating hole, and is arranged in each of the light emitting chambers! In a fluorescent lamp comprising a t% tM electrode and a common cathode electrode disposed in the electrode chamber opposite to each of the electrodes, the common cathode electrode is arranged opposite to a communication hole that intensively communicates the light emitting chamber and the electrode chamber. Since the auxiliary anode electrode is placed between the common cathode electrode and the common cathode electrode, a discharge occurs between the auxiliary anode electrode and the common cathode electrode in the electrode chamber at 7 when the light emission chamber starts emitting light. , the discharge starting voltage between the anode electrode of the light emitting chamber and the common cathode electrode is reduced, and the anode electrode of the light emitting chamber is located on an extension of the discharge path between the auxiliary anode electrode and the common cathode electrode, and the anode electrode of the light emitting chamber The discharge between the auxiliary anode electrode and the common cathode electrode can be started easily, and since the auxiliary anode electrode is placed in an electrode chamber where no fluorescent film is coated, the discharge between the auxiliary anode electrode and the common cathode electrode can be easily started. Colored light is not output during discharge, and stray light does not occur.

According to the invention described in claim 2, since the common cathode electrode and the auxiliary anode electrode are introduced into the electrode chamber from the stem portion, the common cathode electrode and the auxiliary anode electrode can be introduced from the stem portion into the electrode chamber, and the common cathode electrode and the auxiliary anode electrode are introduced into the electrode chamber from the stem portion. Positioning of the electrode and the auxiliary anode bridge becomes easier, and productivity is improved.

According to the invention described in claim 3, since the auxiliary anode electrode is introduced into the electrode chamber from the junction between the light emission chamber and the electrode chamber (7), the auxiliary anode electrode is introduced into the electrode chamber at the time of joining the light emission chamber and the electrode chamber. It can be introduced and the manufacturability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a fluorescent lamp showing an embodiment of the present invention;
FIG. 2 is a front view of the same as above, and FIG. 3 is a sectional view of a fluorescent lamp showing another embodiment of the present invention. 14... Translucent part, 16... Partition plate part, 17... Light emitting chamber, 18... Fluorescent film, 19... Discharge communicating hole, 2G... Anode electrode, 23... Electrode chamber, 24... Stem part , 25... Common cathode electrode, 27... Auxiliary anode electrode.

Claims (3)

[Claims] (1) A plurality of light-emitting chambers each having a light-transmitting part formed on the front side, facing the light-transmitting part on the front side, partitioned by a partition plate part, and having fluorescent films emitting light in different colors coated on the inner circumferential surface, and the light emitting chambers facing the light-transmitting part on the front side. At the rear of the chamber, there is an electrode chamber formed through a communication hole that concentrates and communicates with each light emitting chamber, and an anode electrode disposed in each light emitting chamber, and an electrode chamber opposite to each electrode. In a fluorescent lamp comprising a common cathode electrode disposed in an electrode chamber, an auxiliary anode electrode located between the common cathode electrode and facing a communication hole that centrally communicates the light emitting chamber and the electrode chamber. A fluorescent lamp characterized by being equipped with. (2) The fluorescent lamp according to claim 1, wherein the common cathode electrode and the auxiliary anode electrode are introduced into the electrode chamber from the stem portion. (3) The fluorescent lamp according to claim 1, characterized in that an auxiliary anode electrode is introduced into the electrode chamber from the junction between the light emitting chamber and the electrode chamber.