Abstract: A voltage detection method includes: outputting a corresponding one of voltages to be an input voltage according to a clock signal, a first detection signal, a reset signal and multiple first bits; generating the reset signal according to the clock signal and multiple currents, wherein the voltages and the currents are generated based on a power supply voltage; comparing the input voltage with a reference voltage to generate a second detection signal, and generating the first detection signal according to the second detection signal and an enable signal; and adjusting the first bits by a digital circuit according to the second detection signal during a trimming phase to determine the first bits, and outputting the first bits by the digital circuit and resetting the digital circuit according to the first detection signal during a voltage detection phase.

Abstract: A flower receptacle with a water lamp handicraft, including: a water lamp ornament, where the water lamp ornament includes a water lamp body and a top ornament, and the water lamp body is a hollow and a light-transmissive three-dimensional structure and holds a thick liquid inside, and the top ornament is mounted on the water lamp body; a fixing member, connected to the top ornament, and forming a customized three-dimensional model with the top ornament; and a flower receptacle base, having a tapered structure, mounted on the fixing member, and used for arranging flowers. In the present application, the fixing member and the top ornament are combined, to enable the fixing member and the water lamp ornament to form a unique three-dimensional model.

Abstract: The present invention discloses a power converter controller having a short-circuit protection threshold voltage no higher than an over-current protection threshold voltage so that any abnormal voltage or current stress on semiconductor components can be timely sensed via a current sense pin in the event of a short-circuit fault, effectively preventing semiconductor components from being damaged.

Abstract: The present invention discloses a power converter controller having a short-circuit protection threshold voltage no higher than an over-current protection threshold voltage so that any abnormal voltage or current stress on semiconductor components can be timely sensed via a current sense pin in the event of a short-circuit fault, effectively preventing semiconductor components from being damaged.

Abstract: The present invention discloses a power converter controller with short-circuit protection employing a short-circuit protection increasing slope threshold no higher than an over-current protection increasing slope threshold to detect a short-circuit abnormality in advance through a current sensing pin while any semiconductor component suffering from abnormal voltage or over-current, thereby preventing the semiconductor components from damage.

Abstract: Disclosed is a method of dynamical adjustment for a power supply. The method takes aim at lowering the minimum bulk capacitor voltage to the maximum extent through increasing the switching frequency or the OCP (Over-Current Protection) trip point during the holdup time so that the holdup time can get prolonged or the bulk capacitor can get downsized provided that all other parameters remain unchanged. In general, the proposed method is applicable to a wide variety of power converters.

Abstract: Disclosed is an Auxiliary-Free High-Side Driven Secondary-Side Regulated (AF-HSD-SSR) flyback converter, which includes an AC-to-DC rectification unit, an input capacitor, a switching unit, a current-sensing resistor, an Auxiliary-Free (AF) flyback transformer, an output rectifier, an output capacitor, a PWM controller, and a SSR unit. The AF flyback transformer includes a primary winding and a secondary winding, where the primary winding is split into two halves. The switching unit is placed at the high side of the primary winding, and the PWM controller in collocation with the SSR unit drives the switching unit in response to all the required voltage and current sense signals to keep voltage conversion and power delivery safe and efficient within the specifications. The first half of the primary winding can provide the PWM controller with a continuous and steady working voltage supply after startup, thus eliminating the need for the auxiliary winding.

Abstract: A power supply and a method of power supplying for converting an external alternating power into an output power with appropriate voltage and power are disclosed. The power supply includes an input charging unit, an input filtering unit, a regulating unit, a transformer, a controller, an output unit, an output capacitor, a switching unit and a feedback unit. The regulating unit is connected to the input filtering unit and comprises a regulating capacitor and a regulator connected in series. The regulator is controlled by the controller to perform one of the working modes including initial open circuit, power on conduction, short circuit normal operation and over-voltage open circuit protection. Therefore, the present invention overcomes the problem of inrush current upon powering on, and particularly, the controller performs digital operation with flexibility to meet actual requirements by updating appropriate firmware of software program.

Abstract: A power supply and a method of power supplying for converting an external alternating power into an output power with appropriate voltage and power are disclosed. The power supply includes an input charging unit, an input filtering unit, a regulating unit, a transformer, a controller, an output unit, an output capacitor, a switching unit and a feedback unit. The regulating unit is connected to the input filtering unit and comprises a regulating capacitor and a regulator connected in series. The regulator is controlled by the controller to perform one of the working modes including initial open circuit, power on conduction, short circuit normal operation and over-voltage open circuit protection. Therefore, the present invention overcomes the problem of inrush current upon powering on, and particularly, the controller performs digital operation with flexibility to meet actual requirements by updating appropriate firmware of software program.

Abstract: An apparatus for controlling a display having a backlight module provided with a first set of units and a display panel provided with a second set of units is provided. In one embodiment, the apparatus comprises a reference value generator, a control value generator, and a compensation circuit. The reference value generator generates a reference value representative of a portion of pixels contained in an input image associated with one of the second set of units. The control value generator generates a control value to control one of the first set of units in view of the reference value. The compensation circuit adjusts the portion of pixels contained in the input image in view of the control value. The one of the first units is associated with the one of the second units.

Abstract: An image adjusting method for extending vertical blanking intervals of an image signal is provided. Using the image adjusting method, an adjusted image signal is synchronized with an image signal before the adjustment to prevent image delay. The image adjusting method comprises providing a first image signal having a first data enable signal, wherein the first data enable signal has a first data enable duration; and generating a second data enable signal having a second data enable duration. The first and second data enable durations correspond to a same image frame of an image signal, and the second data enable duration substantially overlaps the first data enable duration.

Abstract: An ac-powered LED light engine coupled between a rectifier and a plurality of extrinsic LED sub-arrays is provided. The ac-powered LED light engine comprises a plurality of normally closed bypass switches, a normally closed current regulator, and a plurality of switch controllers. Each of the normally closed bypass switches is connected in parallel with a corresponding LED sub-array except for the topmost or the bottommost LED sub-array and shuttles between three switch states: ON, REGULATION, and OFF. The normally closed current regulator is coupled to the normally closed bypass switches and used to regulate the highest LED current level near the peak of an extrinsic mains voltage. Each of the switch controllers is coupled to a corresponding bypass switch as a feedback network and takes control of the three switch states according to a corresponding current sense signal.

Abstract: Disclosed are control circuits capable of auto-configuring two LED arrays either in parallel when the two LED arrays are operating off of 100±20% V AC voltage sources or in series when the two LED arrays are operating off of 200±20% V AC voltage sources according to the detection of the AC input voltage magnitude. The disclosed control circuits, ruling over the parallel or series configuration of the two LED arrays, could be implemented in discrete forms or as integrated circuits (IC).

Abstract: A flashing lighting module includes: a base, a light guide unit, and a control circuit. The light guide unit includes at least two light-transmitting plates, each of which has an end forming a fixing section. The fixing sections are respectively received in corresponding mounting holes formed in the base and each includes a light incident surface at the side thereof opposite to the light-transmitting plate. The control circuit includes two light-emitting elements respectively corresponding to the light-transmitting plates and is connectable to a power supply for driving the two light-emitting elements to get lightening and darkening in sequence. As such, when a power supply is conducted on, each of the light-emitting elements gives off light transmitting to the interiors of the light-transmitting plates to make each of the light-transmitting plates show an effect of flashing in response to the lightening and darkening of the corresponding one of the light-emitting elements.

Abstract: Disclosed are novel AC-powered LED light engines for Solid State Lighting (SSL) able to achieve a high PF and a low THD without a traditional PFC. Getting rid of bulky, and costly magnetic components, short-life electrolytic capacitor, and EMI-causing fast switching, the disclosed AC-powered LED light engines ushers in a cost-effective, and energy-efficient LED driver design while eliminating the short-life electrolytic capacitor in an LED driver and reducing the Total Cost of Ownership (TOC). Thanks to no bulky components, the disclosed AC-powered LED light engines in a discrete or an integrated circuit form could be applied to the increasingly popular Driver-on-Board (DoB) design. Aside from being TRIAC-dimmable via legacy phase-cut dimmers, the disclosed LED light engines could also be made PWM-, analog-, or rheostat-dimmable with the incorporation of an appropriate dimming circuit to modulate the average LED current, adding more flexibility and versatility to dimming applications.

Abstract: Disclosed are novel AC-powered LED light engines for Solid State Lighting (SSL) able to achieve a high PF and a low THD without a traditional PFC. Getting rid of bulky, and costly magnetic components, short-life electrolytic capacitor, and EMI-causing fast switching, the disclosed AC-powered LED light engines ushers in a cost-effective, and energy-efficient LED driver design while eliminating the short-life electrolytic capacitor in an LED driver and reducing the Total Cost of Ownership (TOC). Thanks to no bulky components, the disclosed AC-powered LED light engines in a discrete or an integrated circuit form could be applied to the increasingly popular Driver-on-Board (DoB) design. Aside from being TRIAC-dimmable via legacy phase-cut dimmers, the disclosed LED light engines could also be made PWM-, analog-, or rheostat-dimmable with the incorporation of an appropriate dimming circuit to modulate the average LED current, adding more flexibility and versatility to dimming applications.

Abstract: Disclosed are electronic control gears for LED light engines able to improve power factor by way of gearing up or down the LED current and the AC input current in response to and in synchronization with the AC input voltage. Moreover, the disclosed electronic control gears could further reduce flicker phenomenon and total harmonic distortion when used in collocation with disclosed valley fillers, filling the LED current valleys only during the dead time, and in conjunction with disclosed dummy loads, ramping up or down the AC input current only during the dead time.

Abstract: An ac-powered LED light engine coupled between a rectifier and a plurality of extrinsic LED sub-arrays is provided. The ac-powered LED light engine comprises a plurality of normally closed bypass switches, a normally closed current regulator, and a plurality of switch controllers. Each of the normally closed bypass switches is connected in parallel with a corresponding LED sub-array except for the topmost or the bottommost LED sub-array and shuttles between three switch states: ON, REGULATION, and OFF. The normally closed current regulator is coupled to the normally closed bypass switches and used to regulate the highest LED current level near the peak of an extrinsic mains voltage. Each of the switch controllers is coupled to a corresponding bypass switch as a feedback network and takes control of the three switch states according to a corresponding current sense signal.

Abstract: Disclosed are control circuits capable of auto-configuring two LED arrays either in parallel when the two LED arrays are operating off of 100±20% V AC voltage sources or in series when the two LED arrays are operating off of 200±20% V AC voltage sources according to the detection of the AC input voltage magnitude. The disclosed control circuits, ruling over the parallel or series configuration of the two LED arrays, could be implemented in discrete forms or as integrated circuits (IC).

Abstract: Disclosed are electronic control gears for LED light engines able to improve power factor by way of gearing up or down the LED current and the AC input current in response to and in synchronization with the AC input voltage. Moreover, the disclosed electronic control gears could further reduce flicker phenomenon and total harmonic distortion when used in collocation with disclosed valley fillers, filling the LED current valleys only during the dead time, and in conjunction with disclosed dummy loads, ramping up or down the AC input current only during the dead time.