JPH01243304A - Electrodeless discharge lamp - Google Patents

Abstract

PURPOSE:To easily start a lamp with no electrode by integrally providing a start auxiliary bulb with a lamp bulb sealed with the preset quantity of specific elements and a compound and light-exciting the lamp bulb. CONSTITUTION:The preset quantity of mercury, rare gas and metal halogenide are sealed in a lamp bulb 1. Materials capable of light-exciting the bulb 1, e.g., mercury and argon gas, are sealed in a translucent start auxiliary bulb 2 made of translucent quartz. These bulbs 1 and 2 are integrally provide. When the electromagnetic field or electromagnetic waves are applied from the outside, the bulb 1 is not discharged because the halogenide is sealed, but the Penning effect can be expected in the bulb 2, a discharge easily occurs and mercury is illuminated. Ultraviolet rays are radiated into the lamp 1, excitation and ionization occurs in the bulb 1 by the energy of ultraviolet rays, and it is easily transited to the main discharge by the applied electromagnetic field or electromagnetic waves. The bulb 1 can be discharged with no electrode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an 11Jt rock discharge lamp used in an electrodeless discharge lamp device that discharges and emits light using an electromagnetic field or electromagnetic waves.

[Prior Art] Recently, electrodeless discharge lamp devices that discharge and emit light using an electromagnetic field or electromagnetic waves have been developed. The features of this electrodeless discharge lamp device are that unlike light source devices using conventional discharge lamps with electrodes, it has a long lifespan because it does not have electrodes, and also has a blackening phenomenon on the lamp wall due to the scattering of electrode material. This has the advantage that there is no reduction in luminous flux due to

[Problem to be solved by the invention a] In the electrodeless discharge lamp used in such an electrodeless discharge lamp device, a so-called metal halide lamp, in which a metal halide is used as a luminescent substance sealed in the lamp, has a strong electron adhesion property. Because the halogen material is sealed inside the lamp, electromagnetic fields and electromagnetic waves are applied from the outside, and even if electrons are generated inside the lamp, they adhere to the halogen material and do not effectively contribute to dielectric breakdown, making it difficult to start. Met.

The present invention has been made in order to improve the above-mentioned drawbacks, and its purpose is to provide an electrodeless discharge lamp that is easy to start even though metal halides are enclosed. .

[Measures for Solving the Problems Vjt] The present invention will be described below based on examples. FIG. 1 shows an embodiment of the present invention. In the figure, 1 is an electrodeless discharge lamp bulb made of translucent quartz, and inside the lamp bulb 1 is a predetermined amount of mercury, a rare gas, and a metal halide. is included. Reference numeral 2 denotes a starting aid bulb made of translucent quartz, which is filled with a predetermined amount of mercury and a rare gas, and is integrally formed with the lamp bulb 1.

When an electromagnetic field or electromagnetic wave is applied from the outside to the electrodeless discharge lamp configured in this way, since a halogen substance is sealed inside the lamp bulb 1, electrons will adhere to the halogen substance as described above, causing the insulation to deteriorate. Although it is difficult to break down and difficult to start, since only mercury and rare gas are sealed in the starting aid pulp 2, discharge easily occurs within the starting aid bulb 2, causing mercury to emit light. . The ultraviolet light emitted from this mercury is irradiated into the lamp bulb 1, and the energy of this ultraviolet light excites the lamp bulb 1.
Ionization occurs and easily transitions to a main discharge due to the applied electromagnetic field or electromagnetic waves.

Note that it is sufficient that a substance that emits light that can optically excite the lamp bulb 1 is sealed in the starting aid bulb 2 . In particular, if a combination such as mercury and argon gas is used that can be expected to have a Penning effect, dielectric breakdown within the starting aid bulb 2 will occur more easily, and the lamp bulb 1 will start the main discharge after applying an electromagnetic field or electromagnetic wave. It is even more effective in shortening the time it takes to migrate. Further, in the embodiment described above, only one starting assist valve 2 is provided, but it goes without saying that a plurality of starting assist valves 2 may be provided. Further, the shapes of the lamp bulb 1 and the starting aid bulb 2 in the above embodiments are merely examples, and the shapes are not limited.

Next, an example of an electrodeless discharge lamp device using the electrodeless discharge lamp according to the present invention will be described. FIG. 2 shows an example in which a coil is used as the electromagnetic field applying means, and the coil 3 is disposed using a starting assist valve 2.2 provided opposite to the outer circumference of the lamp bulb 1. Both ends of the coil 3 are connected to a high frequency power source (not shown). FIG. 3 shows an example of an electrodeless discharge lamp device that uses microwaves as electromagnetic waves. In the figure, reference numeral 10 denotes an electrodeless discharge lamp according to the present invention, which is composed of a lamp bulb 11 and a starting aid bulb 12 as described above. 13
14 is a magnetron, 14 is a magnetron antenna, 15 is a waveguide, 16 is a microwave cavity, 17 is a microwave feeding port provided at the junction of the waveguide 15 and the microwave cavity 16, and 18 is a microwave feeding port of the microwave cavity 16. This is a mesh board that covers the front. Note that the lamp 10 is fixed to an attachment port 2o provided in the microwave cavity 16 via a lamp support 19.

[Effects of the Invention] As described above, the present invention provides a starting aid valve integrally with a lamp bulb sealed with a predetermined amount of mercury, a rare gas, and a metal halide, and also includes the starting aid valve within the starting aid bulb. The encapsulation of a light-emitting substance capable of photoexciting the lamp bulb facilitates starting the lamp, even though the lamp is encapsulated with metal halides and is an electrodeless discharge lamp.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and a simplified diagram showing an example of an electrodeless discharge lamp device using a second electrode discharge lamp. 1...Lamp bulb 2...Starting aid pulp

Claims (1)

[Claims] (1) A light-transmitting lamp bulb filled with a predetermined amount of mercury, a rare gas, and a metal halide, and an integral part of the lamp bulb that emits light capable of optically exciting at least the lamp bulb. An electrodeless discharge lamp consisting of a light-transmitting starting aid bulb filled with a substance that acts as a starting aid.