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discharge lamp

A discharge lamp and discharge medium technology, which is applied to discharge lamps, gas discharge lamps, and parts of gas discharge lamps, etc., can solve the problems of shortened life, increased tube voltage, and reduced luminous efficiency, so as to prolong life and suppress tube The effect of increasing the voltage and improving the luminous efficiency

Active Publication Date: 2021-05-28
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that the luminous efficiency of a discharge lamp lit by power of 28W (watt) or less is lower than that of a discharge lamp lit by power of about 35W (watt).
However, if only the ratio of scandium halide contained in the metal halide is increased, the tube voltage will increase and flicker will easily occur.
[0006] In addition, depending on the composition ratio of metal halides, free iodine may also increase to cause so-called foil leaks, resulting in shortened life, or color not within the desired range

Method used

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Embodiment Construction

[0042] Embodiments are illustrated below with reference to the drawings.

[0043] The discharge lamp according to the embodiment of the present invention can be, for example, a high-intensity discharge (High Intensity Discharge, HID) lamp used in an automobile headlight. In addition, when the discharge lamp is an HID lamp used in an automobile headlight, it can be a discharge lamp that performs so-called horizontal lighting.

[0044] The use of the discharge lamp according to the embodiment of the present invention is not limited to automobile headlights. Here, as an example, a case where the discharge lamp is an HID lamp used in automobile headlights will be described as an example.

[0045] figure 1 It is a schematic diagram for illustrating the discharge lamp 100 of this embodiment.

[0046] Furthermore, in figure 1 In this case, when the discharge lamp 100 is mounted on a car, the front direction is defined as the front end side, the rear direction is defined as the rea...

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Abstract

The present invention provides a discharge lamp capable of improving luminous efficiency, suppressing rise in tube voltage, prolonging life, and irradiating light of a desired color even if it is lit with low power. It includes: a light-emitting part having a discharge space filled with a discharge medium containing a metal halide and an inert gas, and substantially not containing mercury; and a pair of electrodes protruding into the discharge space and separating Arranged facing each other at a predetermined distance. The metal halides include scandium halides, sodium halides, indium halides, and zinc halides. When the weight of the scandium halide is Ms and the weight of the sodium halide is Mn, 0.8≦Mn / Ms≦1.3. The weight ratio of the indium halide to the metal halide is 0.3 wt% or more and 2.0 wt% or less.

Description

technical field [0001] Embodiments of the present invention relate to a discharge lamp. Background technique [0002] There is a discharge lamp including: a light emitting unit having a discharge space in which a discharge medium is sealed; and a pair of electrodes protruding into the discharge space and arranged facing each other with a predetermined distance therebetween. [0003] Conventionally, the discharge medium includes metal halides, inert gases, and mercury. However, in recent years, from the viewpoint of environmental protection, mercury is not contained in the discharge medium. [0004] In addition, in accordance with the demand for power saving, for example, a discharge lamp is required to be lit with electric power of 22 W (Watt) or more and 28 W (Watt) or less during stable lighting. However, when the discharge lamp is turned on with power of 28W (watt) or less, the temperature of the light emitting part is lower than when the discharge lamp is turned on wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/12H01J61/82
CPCH01J61/125H01J61/827
Inventor 土居昌弘
Owner TOSHIBA LIGHTING & TECH CORP
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