| 摘要 |
<p>A method for automatically controlling the output power of a gas discharge lamp includes: detecting the luminous decay variation of the gas discharge lamp, according to the detected luminous decay variation, matching a corresponding actual power value for the gas discharge lamp; and according to the matched actual power value, regulating the output power of the gas discharge lamp. Accordingly, the invention also discloses an electronic ballast, including: a luminous decay sampling module(8), for detecting the luminous decay variation of the gas discharge lamp; a single chip microcomputer (7), for matching a corresponding actual power value for the gas discharge lamp according to the luminous decay variation detected by the luminous decay sampling module; and a half-bridge inverter(6), for regulating the output power of the gas discharge lamp according to the actual power value matched by the single chip microcomputer microcomputer. The electronic ballast can prolong the service life of the gas discharge lamp, and save more energy compared with existing electronic ballasts by the invention.</p> |
