Class / Patent application number | Description | Number of patent applications / Date published |
315123000 | Plural shunts and/or cut-outs | 7 |
20120280623 | DIMMING APPARATUS TRANSMITTING CONTROL SIGNALS WITH AC POWER LINE - A dimming apparatus transmitting control signals with AC power line ( | 11-08-2012 |
20130069537 | PIXEL CIRCUIT AND DRIVING METHOD THEREOF - The disclosure relates to a pixel circuit which includes an LED, a storage capacitor, a driving transistor, and first to third switching transistors. The driving transistor is utilized to control connection/disconnection between a power supply voltage and the LED. The first switching transistor receives a first scanning signal for controlling connection/disconnection between a gate of the driving transistor and the power supply voltage. The second switching transistor receives a second scanning signal for controlling connection/disconnection between the storage capacity and a ground voltage. The third switching transistor receives the first scanning signal for controlling connection/disconnection between the storage capacity and a data voltage. The first scanning signal and the second scanning signal are in antiphase to each other. A driving method thereof is also disclosed. | 03-21-2013 |
20140197741 | LED LIGHTING APPARATUS - When an LED lighting apparatus which is a lighter load than an incandescent lamp or halogen lamp is connected to a dimmer, a malfunction may occur. The invention prevents the occurrence of such malfunction without defeating the purpose of low power consumption of the LED lighting apparatus. More specifically, the LED lighting apparatus includes a rectifier circuit, a light-emitting circuit connected to the rectifier circuit and containing a single or a plurality of LEDs in which current begins to flow when an output voltage of the rectifier circuit exceeds a threshold voltage, and a bypass circuit having a bypass path for making the current flow to the rectifier circuit without passing through the light-emitting circuit, and a detecting unit for detecting the current flowing through the light-emitting circuit, and wherein when the current detected by the detecting unit exceeds a predetermined value, the bypass circuit shuts off the current flowing through the bypass path. | 07-17-2014 |
20140354158 | Lighting Circuit and Luminaire - A lighting circuit includes an input unit, an output unit, a rectifying circuit, first and second switching circuits, a dimming signal generating circuit, and first and second control units. The input unit is connected to a control device that outputs an alternating-current voltage. The output unit is connected to a light-emitting unit. The rectifying circuit converts the alternating-current voltage into a rectified voltage. The first switching circuit converts the rectified voltage into a first voltage with a first switching element. The second switching circuit converts the first voltage into a second voltage with a second switching element and outputs the second voltage to the output unit. The dimming signal generating circuit generates a dimming signal. The first control unit controls the first switching element. The second control unit controls the second switching element. | 12-04-2014 |
20150312978 | MULTI-BLEEDER MODE CONTROL FOR IMPROVED LED DRIVER PERFORMANCE - Various examples directed to phase-dimming LED driver input circuitry having multiple bleeder circuits activated by a controller with multi-bleeder mode control are disclosed. In one example, the input circuitry may include multiple bleeder circuits controlled by the controller in an open-loop or closed-loop configuration. The controller may selectively activate or deactivate the multiple bleeder circuits based on the input line voltage, the dimming state, and the type of dimming being implemented to improve performance of the LED driver by preventing or reducing shimmering/blinking and by reducing bleeder loss. | 10-29-2015 |
20160081147 | LED TUBE DRIVER CIRCUITRY FOR BALLAST AND NON-BALLAST FLUORESCENT TUBE REPLACEMENT - An LED lamp tube and driver circuit that is direct replacement for fluorescent tubes with or without ballasts, that works with standard AC high voltage current input, with high frequency pulse current input, or with lower voltage input. The tube is wired to receive the current that is input from any two electrode pins from among the pairs of pins at the ends of the tube, which house the driver circuitry. The input current is converted to DC through a rectifier circuit, is filtered of unwanted frequencies and voltage through a filter circuit, and is controlled with a step-down constant current circuit to drive an LED array within the tube. | 03-17-2016 |
20160381760 | LED TUBE LAMP WITH OPERATING MODES COMPATIBLE WITH ELECTRICAL BALLASTS - An LED tube lamp having an LED unit is disclosed. The LED tube lamp includes a control circuit that selectively determines whether to perform a first mode or a second mode of lighting operation according to a state of a property of an external driving signal and a switching circuit coupled to the control circuit and the LED unit. When the control circuit determines to perform the first mode of lighting operation, the control circuit controls the second circuit in a manner such that the switching circuit maintains its on state to allow continual current to flow through the LED unit, until the external driving signal is disconnected from the LED tube lamp, and when the control circuit determines to perform the second mode of lighting operation, the control circuit controls the switching circuit in a manner to regulate the continuity of current to flow through the LED unit by alternately turning on and off the switching circuit. | 12-29-2016 |