JPH0353798U

JPH0353798U -

Info

Publication number: JPH0353798U
Application number: JP11244089U
Authority: JP
Priority date: 1989-09-26
Filing date: 1989-09-26
Publication date: 1991-05-24

Description

[Brief explanation of drawings]

第１図はこの考案の第１の実施例の構成を示す
ブロツク図、第２図ａはこの考案が適用される環
形２灯用照明器具の斜視図、第２図ｂは概略断面
図、第３図はこの考案の第２の実施例の構成を示
す回路図、第４図はこの考案の第３の実施例の構
成を示す回路図、第５図は放電灯点灯装置の従来
例を示すブロツク図、第６図は環形２灯用照明器
具の斜視図および断面図である。１……点灯回路部、２……環形放電ランプ、３
……口金部、４……管壁最冷点、５……温度検出
手段。 Fig. 1 is a block diagram showing the configuration of the first embodiment of this invention, Fig. 2a is a perspective view of a two-ring annular lighting fixture to which this invention is applied, Fig. 2b is a schematic sectional view, and Fig. 2b is a schematic sectional view. Figure 3 is a circuit diagram showing the configuration of a second embodiment of this invention, Figure 4 is a circuit diagram showing the configuration of a third embodiment of this invention, and Figure 5 shows a conventional example of a discharge lamp lighting device. The block diagram and FIG. 6 are a perspective view and a sectional view of a two-lamp annular lighting fixture. 1...Lighting circuit section, 2...Annular discharge lamp, 3
. . . mouthpiece, 4. coldest point on tube wall, 5. temperature detection means.

Claims

[Scope of Claim for Utility Model Registration] (1) Provided with temperature detection means for detecting the temperature at the farthest position from the base of the tube wall of the annular discharge lamp,
A discharge lamp lighting device characterized in that a lighting circuit section is provided for controlling power supplied to the annular discharge lamp according to a temperature detection result by the temperature detection means. (2) In the lighting fixture to which the annular discharge lamp is attached, a lamp holder that also serves as a lamp socket supports the base of the annular discharge lamp, and a lamp support spring supports the part of the tube wall farthest from the lamp holder. The discharge lamp lighting device according to claim 1, wherein the discharge lamp lighting device has a two-point support structure, and wherein the temperature detection means detects the temperature of the lamp support spring.