TEKNOWARE OY Patent applications |
Patent application number | Title | Published |
20150201473 | METHOD AND CONVERTER FOR SUPPLYING CURRENT TO SERIES CONNECTION OF LEDS - The present disclosure describes a boost converter for supplying current to a series connection of light-emitting diodes (LEDs). A duty ratio of the main switch of the converter is configured to be controlled on the basis of a current feedback signal. The current feedback signal is formed as a weighted average of at least two signals including a first signal representing the current through the series connection of LEDs and a second signal representing a current through the main switch. | 07-16-2015 |
20120299494 | LED TUBULAR LAMP AND LIGHTING FIXTURE ARRANGEMENT - A LED tubular lamp comprising a translucent tube ( | 11-29-2012 |
20110260622 | LED TUBE AND LIGHTING FIXTURE ARRANGEMENT - A LED tube includes a substantially fluorescent-tube-shaped and fluorescent-tube-sized translucent or fluorescent tube having one or more LED components and a current control unit installed therein. Both ends of the LED tube are provided with a pair of contact pins for connecting the LED tube mechanically and electrically to the tube holders of the fluorescent tube lighting fixture. The tube has a safety unit arranged to prevent a voltage from transferring through the tube from its one end to the other until a voltage supplied from the corresponding tube holder of the lighting fixture to the pair of contact pins has been detected at each end of the tube separately. Electric power or switching control of electric power is cross-connected between the ends of the LED tube. | 10-27-2011 |
20110260614 | LED TUBE AND LAMP ARRANGEMENT - A LED tube includes a translucent or fluorescent tube of substantially the shape and size of a fluorescence tube, inside which one or more LED components and a current control unit are installed. At both ends of the LED tube, there is a pair of contact pins for connecting the light element mechanically and electrically to the tube holders of the fluorescence tube lighting fixture. The tube lamp has a safety unit arranged to prevent a voltage from transferring through the tube lamp from its one end to the other until a voltage supplied from the corresponding tube holder of the lighting fixture to the pair of contact pins has been separately detected at each end of the tube lamp. Inside the LED tube, there is at least one optical line that is arranged to transfer a control or measurement signal associated with the safety unit from one end of the LED tube to the other without capacitive leakage currents. | 10-27-2011 |
20110228526 | LED TUBE AND LIGHTING FIXTURE ARRANGEMENT - A LED tube ( | 09-22-2011 |
20100001584 | METHOD AND ARRANGEMENT IN CONJUNCTION WITH EMERGENCY LIGHT - A method in conjunction with an emergency light, and an emergency light with equipment comprising one or more LED light sources ( | 01-07-2010 |