Abstract: The present invention discloses a light emitting device array billboard and a control method thereof. The light emitting device array billboard includes a light emitting device array circuit, plural line switch circuits, plural channel switch circuits, plural ghost image compensation switch circuits, and a control circuit. The control circuit operates the line switch circuits and the channel switch circuit to turn ON a selected light emitting device for a duty period in a lighting period, and operates the plural ghost image compensation switch circuits to electrically connect a channel node corresponding to the selected light emitting device to a ghost image compensation voltage after the lighting period. The control circuit further adjusts a channel operation signal according to a gray scale compensation signal, to turn ON the selected light emitting device for a gray scale compensation period in addition to the duty period.

Abstract: The present invention discloses a light emitting device array billboard and a control method thereof. The light emitting device array billboard includes a light emitting device array circuit, plural line switch circuits, plural channel switch circuits, plural ghost image compensation switch circuits, and a control circuit. The control circuit operates the line switch circuits and the channel switch circuit to turn ON a selected light emitting device for a duty period in a lighting period, and operates the plural ghost image compensation switch circuits to electrically connect a channel node corresponding to the selected light emitting device to a ghost image compensation voltage after the lighting period. The control circuit further adjusts a channel operation signal according to a gray scale compensation signal, to turn ON the selected light emitting device for a gray scale compensation period in addition to the duty period.

Abstract: The present invention discloses a light emitting device control circuit and a control method thereof, for controlling a light emitting device array display. The present invention controls not only the conduction timing and duration of one or more selected light emitting devices in the light emitting device array display, but also controls the current flowing through the selected light emitting devices by a variable current source, such that in one frame of a given length, the resolution of the brightness of the light emitting devices is increased.

Abstract: An antibody for activating plasminogen is provided. The antibody is produced from a hybridoma cell line deposited on Nov. 24, 2011 under accession number BCRC 960433 at Food Industry Research and Development Institute, 331 Shih-Pin Road, Hsinchu 300, Taiwan. The uses and producing method of the antibody, and an agent including the antibody used for treating stroke, myocardial infarction or syndromes cause by thrombus are also disclosed.

Abstract: The invention provides a current control circuit and a current control method. The current control circuit controls a current supplied to a current-controlled device according to a conduction control signal. The current control circuit includes: a conduction control switch coupled to the current-controlled device, for determining whether to conduct the current according to the conduction control signal; and a plurality of current control switches connected to one another in series and coupled to the conduction control switch, for controlling a magnitude of the current.

Abstract: A driving circuit for driving light emitting diodes includes a signal-extending circuit and a current sink. The signal-extending circuit is used for receiving an original dimming signal and extending a duty cycle of the original dimming signal. The current sink is coupled to the signal-extending circuit for generating a driving current for driving a series of light emitting diode.

Abstract: A light source driving circuit includes a plurality of light-emitting loads, an operational amplifier, a plurality of transistors, an isolation circuit, and a reference circuit. The first ends of each transistor are electrically connected to the plurality of light-emitting loads respectively. The second end of each transistor is electrically connected to a current mirror. The control end of each transistor is electrically connected to the output end of the operational amplifier. The isolation circuit is electrically connected between the negative input end of the operational amplifier and the plurality of transistors.

Abstract: A switch control circuit has a voltage sensing function. The switch control circuit includes a voltage-clamping buffer, a set driver, a reset driver, and an R-dominant SR latch. The voltage-clamping buffer shifts a switch voltage to generate a down-shifted switch voltage. The set driver generates a set signal according to the down-shifted switch voltage. The reset driver generates a reset signal according to the down-shifted switch voltage. The R-dominant SR latch comprises a set end for receiving the set signal, a reset end for receiving the reset signal, an output end for outputting a switch control signal for controlling conductance of a first transistor coupled to a primary winding of a transformer, and an output bar end for outputting an inverted switch control signal.

Abstract: A floating protection circuit is utilized for a photo-flash capacitor charger. The floating protection circuit includes a comparator and a timer. The comparator is coupled between two feedback resistors of the photo-flash capacitor charger for receiving a feedback voltage. When the feedback voltage is lower than an offset voltage, the comparator outputs a reset signal. If the timer does not receive the reset signal for a predetermined time, the timer outputs a turn-off signal to a switch control circuit of the photo-flash capacitor charger to shut down the switch control circuit.