Abstract: Disclosed are a power factor correction circuit and a power adapter, and the power factor correction circuit includes a sampler, a controller and a current limiter, and the controller includes an error amplification unit, a peak value adjusting unit, an ON/OFF computing unit and a phase lock unit. The sampler is coupled to the phase lock unit, and the current limiter is coupled to the error amplification unit and the ON/OFF computing unit, so as to achieve the effects of enhancing the power factor property of the power factor correction circuit, lowering the manufacturing cost, and improving the electric power utilization.

Abstract: Disclosed are an LED floor lamp and its circuit. The LED floor lamp includes a power module and a light emitting module, and the power module includes a power circuit board and a first coil, and the light emitting module includes a light emitting circuit board, a second coil and an LED light source. The power circuit board and the light emitting circuit board are parallel to each other, and the first coil is fixed on the power circuit board and proximate to the second coil of the light emitting module, and the second coil is fixed on the light emitting circuit and proximate to the first coil of the power module. The LED light source is installed on the light emitting circuit. Therefore, the floor lamp and its circuit can be installed, adjusted, and maintained easily, and the LED light source can be changed conveniently.

Abstract: Disclosed is an outdoor device management system, and a recognition device having a blank record is installed in the outdoor device and includes a first transmission module for electrically connecting a second transmission module of an electronic device such as a mobile phone or a tablet PC. When the outdoor device is installed, an identification code of the electronic device is set and provided to the outdoor device, while coordinates of the outdoor device are captured to form installation data containing the identification code, and the installation data are transmitted to the terminal device, so that the terminal device labels the outdoor device at a corresponding location of a map to complete the installation operation, and the electronic device transmits the identification code or installation data to the recognition device through the second transmission module and the first transmission module for storage and record.

Abstract: Disclosed is a Z-shaped lamp panel applied in a lamp and configured as a comb-shaped body. The Z-shaped lamp panel includes an installing portion disposed at a position corresponding to a comb-handle position and a plurality of carrying portions corresponding to comb-tooth positions respectively. The installing portion is coupled to a side of the carrying portions, and the carrying portions are arranged with an interval apart from each other and provided for installing a plurality of light emitting diodes. Therefore, the cost of the lamp panel can be reduced while the lamp can maintain the light emitting diodes in a matrix form to ensure a maximum illumination range.

Abstract: A light emitting diode (LED) down lamp with a replaceable color temperature filter uses a plurality of blue LEDs as a light source and includes a color temperature filter and a fixing ring. The color temperature filter is installed across the top of the down lamp to apart cover the LEDs with a distance, and then fixed by the fixing ring. Therefore, the color temperature filter can be replaced flexibly with other one in different color temperature one by removing or assembling the fixing ring to change the light projected from the LEDs into different color tone for fitting studio, stage or indoor space applications. Such lamp achieves the effects of enhancing the illumination function of a single down lamp, reducing the inventory cost and improving the practicality.

Abstract: An outdoor device management system, in installations of at least one outdoor device such as a road lamp, a street trash can, an electrical box, a monitor, an electric meter or a sprinkler, uses a wireless sensor with a global positioning system (GPS) chip to sense an identification element of the outdoor device, capture a unique identifier address (UID) and generate sensed data containing coordinate data and then transmits the sensed data to a terminal device, labeling the outdoor device on a corresponding position in a map, and transmitting an operation instruction to trigger and control operations of the corresponding outdoor device. The outdoor device includes a detection element for detecting and reporting current operating status for the terminal device, using the map to plan an optimal path to expedite going to maintain the outdoor device when abnormality occurs so as to improve the convenience and accuracy of management.

Abstract: A light emitting diode (LED) down lamp with a replaceable color temperature filter uses a plurality of blue LEDs as a light source and includes a color temperature filter and a fixing ring. The color temperature filter is installed across the top of the down lamp to apart cover the LEDs with a distance, and then fixed by the fixing ring. Therefore, the color temperature filter can be replaced flexibly with other one in different color temperature one by removing or assembling the fixing ring to change the light projected from the LEDs into different color tone for fitting studio, stage or indoor space applications. Such lamp achieves the effects of enhancing the illumination function of a single down lamp, reducing the inventory cost and improving the practicality.

Abstract: In a management system and a method for unifying LED light color, light colors are projected from a plurality of display units, and each display unit has at least one LED having a color coordinate and a brightness value. The system and method read the color coordinate and the brightness value and compare the color coordinate and the brightness value with a predetermined color coordinate and a predetermined brightness value respectively to produce a coordinate variation value of each LED to correct a duty ratio of a PWM signal of the display unit, so as to adjust a driving current of each LED and move the color coordinate to a position corresponding to the predetermined color coordinate. Therefore, each LED can show the same primary colors through a software calibration without having any chromatic aberration of mixed lights, so as to improve the display effect.

Abstract: An Asymmetric LED In-Ground lamp comprises a number of LED arrays and a number of arrays of LED combined with lens, wherein said LED arrays and said arrays of LED combined with lens are in an asymmetric alternative arrangement with each other in a manner that lights from both arrays can irradiate alternatively over a wall face, and a more uniform and wider irradiation area can be obtained by overlapping the feature of the wider irradiation area exhibited by the LED array itself with the feature of the more concentrated irradiation and higher candel exhibited by the array of LED combined with lens.