HEP TECH CO., LTD. Patent applications |
Patent application number | Title | Published |
20150264771 | METHOD OF DRIVING LED CHIP - A method of driving a LED chip includes the following steps: generate a reference voltage, and accordingly control a driving unit to output electrical energy at a power corresponding to the strength of the reference voltage; obtain an operating current required by the LED chip; control the driving unit to output the operating current to the LED chip under the power corresponding to the reference voltage. Whereby, with different strengths of the reference voltage, the driving unit is capable of outputting electrical energy to the LED chip at different powers. Therefore, one single driving apparatus applied with the method is sufficient to replace multiple conventional driving apparatuses for LED chips. | 09-17-2015 |
20140312807 | METHOD OF TRANSMITTING SIGNALS - A method of transmitting signals applied for a loading control system, which includes a phase angle control module and a driving module, wherein the phase angle control module is electrically connected to an input interface. The method includes the following steps: A. switch the input interface from a first status to a second status; B. modify a voltage waveform of an AC power to make the voltage waveform have a delayed conduction angle in half of its wave period; C. check the delayed conduction angle of the voltage waveform; D. transmitting an electric signal to a loading according to the delayed conduction angle. | 10-23-2014 |
20140292230 | METHOD OF DRIVING LED CHIPS OF DIFFERENT SPECIFICATIONS - A method of driving LED chips, wherein the LED chips have different specifications, includes the steps of: A. defining a plurality of setting currents; B. connecting a LED chip; C. selecting one of the setting currents which matches a rated current of the LED chip; and D. providing power with the selected setting current to the LED chip. Whereby, the method could be applied to drive LED chips of several different specifications. | 10-02-2014 |
20140292228 | DRIVING APPARATUS FOR LED CHIPS OF DIFFERENT SPECIFICATIONS - A driving apparatus for LED chips includes: a driving unit, a voltage measuring unit, and a feedback control module. The driving unit provides a driving voltage and a driving current to a LED chip; the voltage measuring unit measures the driving voltage; the feedback control module is built-in with a default power; According to the driving voltage measured by the voltage measuring unit and the default power, the feedback control module controls the driving unit to maintain the driving current at a working current, wherein the working current matches the rated current of the LED chip. Whereby, the driving apparatus could drive LED chips of different specifications. | 10-02-2014 |
20140217923 | DIMMABLE LED ILLUMINATING SYSTEM - A dimmable LED illumination system includes a power converting circuit and a lamp. The power converting circuit is electrically connected to a power source to convert electric power of the power source into a voltage signal. The lamp includes a DC/DC converter and a LED module, wherein the DC/DC converter is electrically connected to the power converting circuit to convert the voltage signal into a corresponding current signal. The LED module is electrically connected to the DC/DC converter to be driven by the current signal to emit light. By adjusting a voltage provided by the power converting circuit, a current provided by the DC/DC converter could be adjusted as well, which changes a luminance of the LED module. | 08-07-2014 |
20140217922 | DIMMABLE LED LAMP - A dimmable LED lamp, which receives power from a DC power source to emit light, includes a main body, a DC/DC converter, and a LED module; wherein the main body is hollow, and includes a conductive portion made of a conductive material, wherein the conductive portion is connected to the DC power source; the DC/DC converter is provided in the main body, and is electrically connected to the conductive portion of the main body to receive a power from at least a DC power source; the DC/DC converter converts a voltage of the power provided by the DC power source into a corresponding current; the LED module is provided on the main body, and is electrically connected to the DC/DC converter to emit light with luminance corresponding to the current received from the DC/DC converter. | 08-07-2014 |
20140217912 | DIMMABLE LED ILLUMINATING SYSTEM, DRIVER OF THE ILLUMINATING SYSTEM, AND METHOD OF DRIVING THE ILLUMINATING SYSTEM - A dimmable LED illumination system includes a LED lamp, a switch, and a driver. The LED lamp receives electric signals to emit light; the switch is connected to a power source, and generates a pulse signal by being turned off and then on again in a predetermined time; the driver connects the switch to the LED lamp to convert electric power of the power source into the electric signals which are supplied to the LED lamp when the switch is turned on. In addition, the driver saves a setting luminance, a default illumination mode, and a luminance adjustment mode. When the driver receives the pulse signal, one of the two modes is selected to light the LED lamp. | 08-07-2014 |
20140153306 | AC/DC CONVERTER AND METHOD OF CORRECTING POWER FACTOR - An AC/DC converter includes a rectifier circuit and an active power factor correction circuit. The rectifier circuit is electrically connected to a power supply, and is used to convert an alternate current into a direct current, wherein the rectifier circuit has a positive output and a negative output for sending out the direct current. The active power factor correction circuit electrically connects the rectifier circuit and a loading, wherein the active power factor correction circuit is used to suppress voltage ripples provided to the loading. | 06-05-2014 |
20140153305 | AC/DC CONVERTER WITH PASSIVE POWER FACTOR CORRECTION CIRCUIT AND METHOD OF CORRECTING POWER FACTOR - An AC/DC converter includes a rectifier circuit and a power factor correction circuit. An input port of the rectifier circuit receives an alternate current. The power factor correction circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a first diode and a second diode. An end of the first inductor electrically connects to a positive pole of an output port of the rectifier circuit, and the other end electrically connects to a ground terminal of the output port through two parallel series routes which are bridged by the first diode. Wherein a series route contains the first capacitor and the second diode, and the other series route contains the second inductor and the second capacitor. The second capacitor is provided for parallel connecting with a loading. In this way, the input current could be controlled to increase the power factor effectively. | 06-05-2014 |
20140153296 | ISOLATED POWER CONVERSION APPARATUS AND METHOD OF CONVERTING POWER - An isolated power conversion apparatus includes an isolation transformer and an auto charge pump circuit. The isolation transformer has a primary side and a second side, wherein the primary side is electrically connected to a pulsed power supply, and the secondary side has a first end and a second end; the auto charge pump circuit electrically connects the isolation transformer to a loading to improve power conversion efficiency and suppress output voltage ripples. | 06-05-2014 |
20130147392 | POWER PROCESSING APPARATUS AND METHOD OF RELEASING THE RESIDUAL POWER THEREOF - A power processing apparatus includes an input port, an output port, a power transforming module, and a power releasing module. The power transforming module is between the input port and the output port to transform power into predetermined voltage or current. The power transforming module has a capacitor unit connected to LEDs in parallel. The power releasing module has a switch unit to disconnect the resistor unit and the capacitor unit when the power transforming module receives the power, and to connect the resistor unit to the capacitor unit when the power transforming module does not receive the power. Therefore, it may release the residual power to make the LED off in a short time when one turns off the power. | 06-13-2013 |
20130119884 | LIGHT SOURCE MODULE - The present invention provides a light source module, including at least a LED and a switching power supply. The switching power supply has an input port, an output port, a transforming unit, and a switching unit. An external power source is connected to the input port, the LED is electrically connected to the output port, and the transforming unit is between the input port and the output port to receive power of the external power source through the input port, transform the power, and send the power to the light emitting diode through the output port. The switching unit includes a ringing choke converter electrically connected to the transforming unit to make the transforming unit provide a constant current to the LED by turning on and turning off the power outputting from the transforming unit. | 05-16-2013 |