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Method and system for avoiding flicker for SSL devices
Method and system for avoiding flicker for SSL devices
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机译:避免SSL设备闪烁的方法和系统
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摘要
The present document relates to illumination systems. In particular, the present document relates to a method and system for avoiding flicker (in particular 100Hz or 120Hz flicker) in solid state lighting devices such as LED or OLED assemblies. A controller (220) for a driver circuit (200) of a solid state lighting, referred to as SSL, device (250) is described. The driver circuit (200) comprises a power converter (230) configured to convert a varying input voltage (402) into a drive voltage for the SSL device (250). The input voltage (402) is derived from a rectified AC mains voltage (401) at a mains frequency. The controller (220) is configured to synchronize to the mains frequency; determine a plurality of pulse intervals (403) repeated at a pulse frequency; and control the power converter (230) to generate the drive voltage for the SSL device (250) within the plurality of pulse intervals (403), such that the drive voltage within the plurality of pulse intervals (403) corresponds at least to the on-voltage of the SSL device (250).
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