Light source device

Abstract

The invention provides a light source device, which can prevent surfaces of an electric discharge lamp and a reflecting mirror from producing white spots caused by siloxane, inhibit light quantity decline, and maintain service life of the lamp. The light source device is provided with the electric discharge lamp and the reflecting mirror, wherein a pair of electrodes is arranged in an illuminating part, and sealing parts are formed at two ends of the illuminating part; the reflecting mirror comprises a reflecting part and a head projecting from a central bottom, the interior of the head is provided with a narrow part beginning from the reflecting part and a communicating hole formed by a concave part connected with the narrow part, one sealing part of the electric discharge lamp is inserted into the communicating hole and fixed by adhesive filled at the concave part, a lateral surface connecting the narrow part and the concave part forms an abutting surface vertical to a tubular axle of the electric discharge lamp, and the lateral surface comprises a first gasket inserted into the sealing part and abutted with the abutting surface and a second gasket inserted into the sealing part and abutted with the first gasket, wherein the inside diameter of the first gasket is the outside diameter of the sealing part, the outside diameter is smaller than the diameter of the concave part, the inside diameter of the second gasket is larger than the outside diameter of the sealing part, and the outside diameter is diameter of the concave part.

Description

technical field [0001] The present invention relates to a light source device used as a light source for a liquid crystal display device, a projection projector device, and the like. Background technique [0002] Currently, in liquid crystal display devices, projection projector devices, and the like, light source devices configured by combining, for example, a light source made of a discharge lamp and a reflector are used. [0003] Figure 4 It is a schematic explanatory diagram showing the configuration of an example of a conventional light source device using a discharge lamp. [0004] Like the invention described in Japanese Patent Application Laid-Open No. 2002-62586, in this light source device, the discharge lamp 1 is assembled into the reflector 3, and the optical axis of the discharge lamp 1 coincides with the central axis of the reflector 3. A head 31 is provided on a central bottom 36 of the reflection mirror 3 , and a narrow portion 38 is formed on the reflectio...

AI Technical Summary

Problems solved by technology

[0009] However, if sealing is performed without cooling air flowing in, the gas containing siloxane stays in the airtight space inside the reflector 3, so when siloxane adheres to the surfaces of the discharge lamp 1 and the reflector 3, white spots are generated. , resulting in the problem that the amount of light drops

In addition, when siloxane adheres to the arc tube of the discharge lamp, the temperature of the arc tube rises, which causes the problem of shortening the life of the lamp.

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