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External Electrode Fluorescent Lamp (EEFL) Driving Methods
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DOI：10.1109/TIA.2019.2918045.png)
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摘要
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External electrode fluorescent lamps (EEFLs) are used as backlight source for large screen size liquid-crystal displays. Since electrodes are outside of the discharge tube, lifetime is enhanced when compared with cold cathode fluorescent lamps. Also, a single inverter can drive multiple EEFL tubes, leading to a compact design, driven by sinusoidal or square waveforms. Luminance can be enhanced by synchronizing the moment of the self-discharge of the dielectric wall charge with voltage rising and falling. This paper presents luminance measurements for different driving alternatives and lamp voltages, showing that EEFLs have an electrical behavior similar to dielectric barrier discharge lamps and light emission similar to the conventional fluorescent lamps. It is also shown that sinusoidal operation is more efficient than square wave operation in the light emission sense for the explored conditions.
Keyword:
Capacitive component
external electrode fluorescent lamp (EEFL)
liquid-crystal display (LCD) backlight
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3.5W
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分享收藏Self-discharge synchronizing operations in the external electrode fluorescent multi-lamps backlight
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