JPH0727049U - Discharge tube with current limiting function - Google Patents

Abstract

(57) [Abstract] [Purpose] A high-frequency capacitor is built into a part of the discharge tube to limit the current and improve the discharge characteristics. [Structure] A capacitor 3 is built in both ends or one stem 2 of a discharge tube 1 to achieve the purpose.

Description

[Detailed description of the device]     [0001]   [Industrial applications]   The present invention relates to a light source used for various purposes such as OA and AV in recent years. Is.     [0002]   [Prior art]   Traditionally, lighting in this field has been much more profitable due to the combination of a fluorescent discharge tube and a dedicated power supply. Was used. In addition, limit and adjust on the power supply side in order to pass an appropriate current to the discharge tube. There was a need.     [0003] [Problems to be solved by the device]   In that case, in many cases, the light was turned on by the high frequency power supply circuit. In that circuit Since I was trying to obtain a proper current with the current limiting capacitor of There was such a flaw. (B) When there was a distance between the power supply and the discharge tube, high frequency current leaked between them. (B) The leakage hindered stable discharge.     [0004] [Means for Solving the Problems]   The present invention was invented to eliminate those drawbacks, and this will be explained with reference to the drawings. Clearly, a high-frequency capacitor 3 is built into the stem 2 on either or both sides of the discharge tube 1. Then, the electrode 4 is attached to one of the both poles, and the external terminal 5 is attached to the other. It is a construction.     [0005]     The following may be considered in implementation.   (B) The structure of the electrode and the discharge type are not limited.   (B) Pipe diameter and length The sealing type does not matter.   (C) It does not matter whether it is the discharge tube itself or a processed product such as attaching a wire to it. And     [0006]   【The invention's effect】     Therefore, if this discharge tube is used, an appropriate current can be obtained just before the discharge tube. Therefore, the current can be efficiently passed through the electrode 4. Moreover, there is no restriction on the power supply side Therefore, even if the distance between the discharge tube and the power supply is lengthened, current does not leak as much as in the past. . Therefore, the influence of noise on the surroundings is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] Cross-sectional view of the present invention [FIG. 2] Circuit diagram of the present invention [FIG. 3] Conventional cross-sectional view [FIG. 4] Conventional circuit diagram [FIG. 5] Experimental data and its circuit [Explanation of symbols] 1 discharge tube 7 DC power supply 2 stem 8 commercial power supply 3 high frequency capacitor 9 external capacitor 4 electrode 10 prototype data 5 external terminal 11 comparison data (conventional product) 6 high frequency power supply 12 test circuit

Claims (1)

[Claims for utility model registration] [Solution 1] A discharge tube characterized in that one or both electrodes of the discharge tube have a built-in capacitor having a current limiting function, and have that function.