Discharge lamp
OwnerKenji Itaya, Yoshinori Kakuno +2inventors
InventorsKenji Itaya, Yoshinori Kakuno, Kouichi Katase, Jun'ichi Takahashi
Life of this patent
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Abstract
The discharge lamp comprises: an arc tube including electrodes disposed at both ends of a glass tube; and bases provided at the two ends of the glass tube and supplying power to the electrodes. The arc tube includes two spiral parts, extending from the middle part of the glass tube to both end parts thereof, circularly winding around an imaginary axis and progressively away from the imaginary axis as shifted in a direction from the middle part toward the end parts. The end parts of the glass tube are attached by a silicon resin to adjacent parts of the glass tube, which are located on the imaginary axis side in relation to the end parts.
Claims14
A discharge lamp comprising:
- an arc tube (i) which includes a glass tube and electrodes each sealed in at one of two end parts of the glass tube, and (ii) in which a portion of the glass tube, extending from a middle part of the glass tube to one of at least one end part and at least one end-part neighboring part thereof, winds around an imaginary axis and progressively away from the imaginary axis as shifted in a direction from the middle part toward the one of at least one end part and at least one end-part neighboring part, the end-part neighboring part adjoining to the end part and being, along the direction, closer to the middle part than the end part is;
- a holder supporting the arc tube;
- and
- two bases supplying power to the electrodes,
- wherein a 1st region is within the portion of the glass tube,
- an adjacent part including one or more of the holder, the bases, and a 2nd region positioned within the glass tube is disposed adjacent to the 1st region, and
- the 1st region is fixed to the adjacent part by a fixation material.
A discharge lamp comprising:
- an arc tube (i) which includes a glass tube and electrodes each sealed in at one of two end parts of the glass tube, and (ii) in which a portion of the glass tube, extending from a middle part of the glass tube to one of at least one end part and at least one end-part neighboring part thereof, winds around an imaginary axis and progressively away from the imaginary axis as shifted in a direction from the middle part toward the one of at least one end part and at least one end-part neighboring part, the end-part neighboring part adjoining to the end part and being, along the direction, closer to the middle part than the end part is;
- and
- two bases attached onto the end parts of the glass tube and supplying power to the electrodes,
- wherein adjacent parts within the glass tube, each of which is adjacent to one of the bases, are fixed at least to the bases by a fixation material.
A discharge lamp comprising:
- an arc tube (i) which includes a glass tube and electrodes each disposed at one of two end parts of the glass tube, and (ii) in which a portion of the glass tube, extending from a middle part of the glass tube to one of at least one end part and at least one end-part neighboring part thereof, winds around an imaginary axis and progressively away from the imaginary axis as shifted in a direction from the middle part toward the one of at least one end part and at least one end-part neighboring part, the end-part neighboring part adjoining to the end part and being, along the direction, closer to the middle part than the end part is;
- and
- a holder supporting the arc tube,
- wherein adjacent parts within the glass tube, each of which is adjacent to one of the end parts of the glass tube, or one of end-part neighboring parts of the glass tube, are fixed to the end parts or the end-part neighboring parts by a fixation material.
Dependencies are inferred from the claim text.