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Low-pressure gas discharge lamp without mercury in filling gas

A low-pressure gas and gas-filling technology, which is applied to gas discharge lamps, low-pressure discharge lamps, parts of gas discharge lamps, etc., can solve problems such as low energy levels, and achieve high and improved luminous efficiency

Inactive Publication Date: 2002-04-03
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of mercury low-pressure gas discharge lamps is that mercury vapor mainly emits high-energy electromagnetic spectrum radiation in the invisible short-wave ultraviolet (UV-C) range, which must first be converted into low-level visible radiation by phosphors

Method used

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  • Low-pressure gas discharge lamp without mercury in filling gas
  • Low-pressure gas discharge lamp without mercury in filling gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of glass cylindrical discharge tube whose glass is transparent to long-wave ultraviolet (UV-A) radiation, long 15 centimeters, diameter 2.5 centimeters, built-in electrode is tungsten. The discharge tube was evacuated, and at the same time, 0.3 mg of indium bromide was added. Argon at a cold pressure of 1.7 mbar is also charged. An external AC power supply provides AC luminescence, and the luminous efficiency is measured when the operating temperature is 225°C. The luminous efficiency is 100 lumens / watt.

Embodiment 2

[0047]A glass cylindrical discharge tube whose glass is transparent to long-wave ultraviolet (UV-A) radiation, 15 cm long and 2.5 cm in diameter, with copper external electrodes. The discharge tube is evacuated, and at the same time, indium bromide, indium iodide and argon are added as filling gases. At the operating temperature, the partial pressure of indium bromide is 5.0 to 15.0 microbar, the partial pressure of indium iodide is 0.5 to 1.5 microbar, and the partial pressure of argon is 5.0 millibar.

[0048] The external power supply provides a high-frequency electric field with a frequency of 13.5 MHz, and the luminous efficiency is 85 lumens / watt at an operating temperature of 240°C.

Embodiment 3

[0050] A kind of glass cylindrical discharge tube whose glass is transparent to long-wave ultraviolet (UV-A) radiation, long 15 centimeters, diameter 2.5 centimeters, built-in electrode is tungsten. The discharge tube is evacuated, and at the same time, indium bromide, thallium iodide and argon are added as filling gases. At working temperature, the partial pressure of indium bromide is 1.0 to 10.0 microbar, the partial pressure of thallium iodide is less than 1 microbar, and the partial pressure of argon is 5.0 mbar.

[0051] The external AC power supply provides AC light, and the luminous efficiency is 90 lumens / watt when the working temperature is 210±10°C.

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Abstract

A low-pressure gas discharge lamp provided with a gas discharge vessel containing a gas filling with an indium compound and a buffer gas, which low-pressure gas discharge lamp is also provided with electrodes and means for generating and maintaining a low-pressure gas discharge.

Description

technical field [0001] The invention relates to a low pressure gas discharge lamp comprising a gas discharge vessel filled with gas, electrodes and means for generating and maintaining a low pressure gas discharge. Background technique [0002] The basic principle of low-pressure gas discharge lamp luminescence is that charge carriers, specifically electrons or ions, are violently accelerated by the electric field between the electrodes of the lamp, collide with atoms or molecules filled with gas in the lamp, and excite or ionize them. When the filling gas atoms or molecules return to the ground state, almost most of the excited energy is converted to radiant energy. [0003] Conventional low-pressure gas discharge lamps contain mercury in the filling gas and have a fluorescent coating on the inner wall of the gas discharge vessel. A disadvantage of mercury low-pressure gas discharge lamps is that mercury vapor mainly emits high-energy electromagnetic spectrum radiation in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/16H01J61/12H01J61/18
CPCH01J61/70H01J65/048H01J61/125H01J61/12
Inventor R·P·肖尔R·希尔比格A·克伯J·拜尔
Owner KONINK PHILIPS ELECTRONICS NV