Abstract: An apparatus for driving LEDs using high voltage includes two LED driving circuits and two switches controlled by a universal controller so as to connect the two LED driving circuits in two different configurations. Each LED driving circuit has an LED unit formed by a plurality of LED segments. Each LED segment has an associated bypass switch controlled by an LED controller to bypass or connect the LED segment in the LED unit. When an input voltage ranges from rectified 90 volt AC to rectified 140 volt AC, the two switches are controlled to connect the two LED driving circuits in parallel. When the input voltage ranges from rectified 180 volt AC to rectified 265 volt AC, the two switches are controlled to connect the LED segments of the LED unit in one LED driving circuit in series with the other LED driving circuit.

Abstract: An apparatus for recording game history is coupled between a game host and a game console and performs a game history recording and interaction method. The apparatus communicates with the game host through a first wireless unit, and communicates with the game console through a second wireless unit, to receive game operation information generated from operations of the game console. The apparatus receives a video signal outputted by the game host through a video input port. The processing module is coupled to the wireless units and the video input port respectively and is used to obtain the game operation information from the wireless units and generate operation information images corresponding to the game operation information. The processing module superimposes the operation information images on the video signal correspondingly to form game history video data and outputs the superimposed game history video data to a display device for display.

Abstract: An apparatus for driving LEDs using high voltage includes two LED driving circuits and two switches controlled by a universal controller so as to connect the two LED driving circuits in two different configurations. Each LED driving circuit has an LED unit formed by a plurality of LED segments. Each LED segment has an associated bypass switch controlled by an LED controller to bypass or connect the LED segment in the LED unit. When an input voltage ranges from rectified 90 volt AC to rectified 140 volt AC, the two switches are controlled to connect the two LED driving circuits in parallel. When the input voltage ranges from rectified 180 volt AC to rectified 265 volt AC, the two switches are controlled to connect the LED segments of the LED unit in one LED driving circuit in series with the other LED driving circuit.

Abstract: An apparatus for recording game history is coupled between a game host and a game console and performs a game history recording and interaction method. The apparatus communicates with the game host through a first wireless unit, and communicates with the game console through a second wireless unit, to receive game operation information generated from operations of the game console. The apparatus receives a video signal outputted by the game host through a video input port. The processing module is coupled to the wireless units and the video input port respectively and is used to obtain the game operation information from the wireless units and generate operation information images corresponding to the game operation information. The processing module superimposes the operation information images on the video signal correspondingly to form game history video data and outputs the superimposed game history video data to a display device for display.

Abstract: An apparatus for recording game history is coupled between a game host and a game console and performs a game history recording and interaction method. The apparatus communicates with the game host through a first wireless unit, and communicates with the game console through a second wireless unit, to receive game operation information generated from operations of the game console. The apparatus receives a video signal outputted by the game host through a video input port. The processing module is coupled to the wireless units and the video input port respectively and is used to obtain the game operation information from the wireless units and generate operation information images corresponding to the game operation information. The processing module superimposes the operation information images on the video signal correspondingly to form game history video data and outputs the superimposed game history video data to a display device for display.

Abstract: An electronic apparatus having a coplanar waveguide transmission line configured to reduce impedance discontinuity in the coplanar waveguide transmission line is introduced. The electronic apparatus includes a coplanar waveguide transmission line including a substrate, at least one signal line and a plurality of reference planes, and the electronic apparatus includes at least one passive component. Each of the reference planes is coupled to a DC voltage. The at least one passive component is electrically connected between the reference planes and acts as a short circuit at relatively high frequencies.

Abstract: An LED driving circuit comprises an LED unit having a plurality of LEDs connected in series, coupled with a voltage charging and discharging unit and powered by a rectified AC voltage of an AC input voltage. A controllable current limiting unit or a current limiting unit in association with a switch connects the LED unit to ground. The voltage charging and discharging unit has first and second diodes connected to the LED unit, and a storage capacitor to form a charging path through the first diode and a discharging path through the second diode in order to provide a steady state capacitor voltage for reducing the number of LEDs connected in series in the LED unit.

Abstract: An apparatus for driving LEDs using high voltage includes two LED driving circuits and two switches that can be turned on or off by a universal controller so as to connect the two LED driving circuits in two different configurations. When the input voltage is in a range from rectified 90 volt AC to rectified 140 volt AC, the two switches are controlled in such a way that the two LED driving circuits are connected in parallel. When the input voltage VIN is in a range from rectified 180 volt AC to rectified 265 volt AC, the two switches are controlled to connect the LED segments of the LED unit in one LED driving circuit in series with the other LED driving circuit.

Abstract: An LED-based lighting apparatus comprises a rectified AC voltage source having a rectified output connected to a storage capacitor through a switching device, a plurality of LED segments controlled by a linear driving circuit and at least one charging path connected between the LED segments and the storage capacitor. One or more controllable linear LED driving units may be connected in parallel with the storage capacitor to provide balance between reducing flicker and increasing power factor of the lighting apparatus.

Abstract: A calibration system and method for a multi-display system. Test patterns displayed on each screen of the multi-display system are captured by a handheld device. One of the captured images corresponding to a specific display is designated as a standard image such that the handheld device can compare the other captured images corresponding to the other displays with the standard image to determine at least one adjustment parameter for each display. The images output to each display can be adjusted according to the adjustment parameter so as to eliminate the display differences between the images.

Abstract: An apparatus for recording game history is disclosed. The apparatus is coupled between a game host and a game console, and includes an interface module, a video input port, and a processing module. The interface module establishes a first connection with the game host and a second connection with the game console respectively, and receives game operation information generated from operations of the game console. The video input port receives a video signal outputted by the game host. The processing module is coupled to the interface module and the video input port respectively and is used to obtain the game operation information from the interface module and generate operation information images corresponding to the game operation information. The processing module superimposes the operation information images on the video signal correspondingly to form game history video data.

Abstract: An LED-based lighting module comprises an LED lighting unit with voltage dependent brightness and a cover disposed to cover all or a portion of light output paths of the LED lighting unit. The cover comprises slow decay phosphor that can suppress the brightness variation of the LED lighting unit to reduce flicker without sacrificing power factor.

Abstract: An apparatus comprises red, green and blue LED strings each having a corresponding switching circuit. Each LED string is divided into a plurality of LED segments. The three LED strings are connected in parallel or in series. Each LED string may be connected in series with a respective current source or share a common current source. A controller controls each switching circuit so that the number of LED segments connected in series in the red, green or blue LED string can be respectively controlled according to a color setting signal and the voltage level of an input voltage. A first control method is provided for controlling the apparatus having a constant input voltage and a second control method is provided for controlling the apparatus having a periodically time-varying input voltage.

Abstract: An LED-based lighting apparatus comprises a rectified AC voltage source having a rectified output connected to a storage capacitor through a switching device, a plurality of LED segments controlled by a linear driving circuit and at least one charging path connected between the LED segments and the storage capacitor. One or more controllable linear LED driving units may be connected in parallel with the storage capacitor to provide balance between reducing flicker and increasing power factor of the lighting apparatus.

Abstract: An apparatus for driving LEDs using high voltage includes a plurality of LEDs divided into a plurality of LED segments connected in series with a switching voltage detector and a current limiting device. Each of the plurality of LED segments is connected in parallel with a switching device. A high input voltage supplies power to the apparatus. The switching voltage detector generates a first mode change signal when the input voltage increases and a second mode change signal when the input voltage decreases. A switch controller receives the two mode change signals and generates a plurality of switching control signals to respectively control the switching devices of the plurality of LED segments.

Abstract: An apparatus for driving LEDs using high voltage includes a plurality of LEDs divided into a plurality of LED segments connected in series with a switching voltage detector and a current limiting device. Each of the plurality of LED segments is connected in parallel with a switching device. A high input voltage supplies power to the apparatus. The switching voltage detector generates a first mode change signal when the input voltage increases and a second mode change signal when the input voltage decreases. A switch controller receives the two mode change signals and generates a plurality of switching control signals to respectively control the switching devices of the plurality of LED segments.

Abstract: An LED-based lighting apparatus includes a plurality of LED-based lighting segments connected in series with a current control device. Each lighting segment has at least one LED-based lighting unit connected in series. A plurality of switch controllers controlled by a switching voltage comparator unit is connected with the plurality of LED-based lighting segments to provide multiple operation modes for turning on different number of LED-based lighting segments. In one embodiment, each switch controller is connected in parallel with a corresponding segment. The switching voltage comparator unit generates a propagation signal that propagates through and controls the plurality of switch controllers. In the other embodiment, each switch controller is connected between a positive end of the corresponding segment and a current control device. The switching voltage comparator unit generates two propagation signals that propagate through and control the plurality of switch controllers.

Abstract: An LED-based lighting apparatus is powered by multi-phase AC voltages to reduce flicker. A multi-phase AC-to-AC power generator is used to generate a plurality of AC voltages from an AC power source. The plurality of AC voltages each having a different phase are rectified by a plurality of rectifiers to provide a plurality of rectified AC voltages for a plurality of LED lighting units. Each LED lighting unit has voltage dependent brightness and reaches maximum brightness at different time due to the phase difference in the rectified AC voltage. The peak-to-peak variation in the total brightness is reduced and therefore the LED-based lighting apparatus has low flicker.

Abstract: An apparatus for driving LEDs using high voltage includes a plurality of LEDs divided into a plurality of LED segments connected in series and a plurality of three-terminal voltage controlled current limiting devices. Each of the current limiting devices is associated with one of the LED segments and has a first terminal connected to a negative end of the associated LED segment, a second terminal applied with a bias voltage and a third terminal connected to a common node. A current source is connected between the common node and ground. A power-loss reduction circuit having a plurality of LEDs controlled by an LED controlling circuit may further be inserted between the common node and the current source to reduce the power loss in the current source because of the high voltage at the common node.

Abstract: An apparatus for driving LEDs using high voltage includes a plurality of LEDs divided into a plurality of LED segments connected in series and a plurality of three-terminal voltage controlled current limiting devices. Each of the current limiting devices is associated with one of the LED segments and has a first terminal connected to a negative end of the associated LED segment, a second terminal applied with a bias voltage and a third terminal connected to a common node. A current source is connected between the common node and ground. A power-loss reduction circuit having a plurality of LEDs controlled by an LED controlling circuit may further be inserted between the common node and the current source to reduce the power loss in the current source because of the high voltage at the common node.