摘要:
An open protection circuit (300) for a backlight module includes a PWM (350) with a control port (351) to disable the PWM. A switch (371) has a gate and a source connected to the control port. A plurality of first input circuits (330) includes first diodes (331), each of which has a first positive terminal connected to the gate and a negative terminal connected to ground. A plurality of second input circuits (340) include input resistors (341) connected to the control port. A plurality of detecting circuits (310, 380) are connected to the fluorescent lamps (311) and the first and second input circuits respectively. Each detecting circuit includes a sampling resistor (313) connected to one of the negative terminals of the first diodes, thereby the control port of the PWM is pulled low when either one of the fluorescent lamps are open-circuit.
摘要:
An exemplary inverter circuit (200) includes a direct current (DC) input terminal (210); a transformer (230) including a first primary winding (231) and a second primary winding (232); a first switch transistor (240); a second switch transistor (250); a pulse generator (260) providing pulse driving signals to the first switch transistor and the second transistor respectively; and a resistor (29). The first primary winding and the second primary winding share a tap (235), the tap is connected to the DC input terminal via the resistor. A drain electrode of the first switch transistor is connected to the tap via the first primary winding, and a drain electrode of the second switch transistor is connected to the tap via the second primary winding.
摘要:
An exemplary printed circuit board (2) includes a substrate (21) and a printed circuit (20) formed on the substrate. The printed circuit includes a first input wire (210) and a ground wire (230). The first input wire includes at least one tip and the ground wire includes at least one tip facing the at least one tip of the first input wire. Each of the tips of the first input wire and the ground wire defines a pointed end.
摘要:
An exemplary backlight modulation circuit (200) includes a pulse generator circuit (210) configured for generating a first square pulse; a voltage division circuit (230) configured for receiving the first square pulse and generating a second square pulse according to the first square pulse; an oscillator circuit (240) configured for generating a reference voltage; and an amplifier (200) comprising a negative input configured for receiving the second square pulse from the voltage division circuit, and a positive input configured for receiving the reference voltage from the oscillator circuit as a reference pulse signal, the amplifier being configured for generating a backlight adjusting signal according to the reference pulse signal and the second square pulse.
摘要:
An exemplary power switching circuit (20) includes a control signal input terminal (210) which is configured for receiving a control signal; an output terminal (220) configured to be connected to a load circuit with capacitance; a direct current (DC) power supply (230); a first switching transistor (240) including a control electrode connected to the control signal input terminal, a first current conducting electrode, and a grounded second current conducting electrode; a second switching transistor (250) including a control electrode connected to the first current conducting electrode of the first switching transistor, a first current conducting electrode connected to the DC power supply, and a second current conducting electrode connected to the output terminal; and a third switching transistor (260) including a control electrode connected to the control signal input terminal, a first current conducting electrode connected to the output terminal, and a grounded second current conducting electrode.
摘要:
An exemplary backlight control circuit (200) includes two load circuits (210), a pulse width modulation integrated circuit (PWM IC) (250) having a current sampling pin (251), a first transistor (271), a first input circuit (230) and a second input circuit (240) including an input resistor. Each load circuit includes an output end (212, 222). The first input circuit includes a second transistor (234). The drain electrode of the first transistor is connected to the current sampling pin. The gate electrode of the first transistor is connected to the drain electrode of the second transistor and is connected to a power supply. The gate electrode of the second transistor is connected to one of the output ends of the load circuits via the diode. The other one of the output ends of the load circuits is connected to the current sampling pin via the input resistor.
摘要:
A backlight control circuit (200) includes an electrical source (240), a signal input terminal (210), a pulse width modulation integrated circuit (PWM IC) (220) having an enable pin (221), and a transistor (231). The transistor includes a drain electrode, a source electrode, and a gate electrode. The drain electrode of the transistor is connected to the signal input terminal. The source electrode of the transistor is connected to the enable pin of the PWM IC. The gate electrode of the transistor is connected to the electrical source via a first resistor (232) and connected to ground via a second resistor (233). The configuration of the backlight control circuit is simple.
摘要:
A drive circuit of a computer system is for driving a mode indicator. The computer system includes a first port and a second port. The mode indicator includes a first receiving end and a second receiving end. The drive circuit includes a first input end connected to the first port, a second input end connected to the second port, a first output end connected to the first receiving end, a second output end connected to the second receiving end. A power supply is connected to the first input end and the second input end via a first resistor and a second resistor respectively. The mode indicator is dichromatic and has two LEDs emitting non-matching colored light.
摘要:
The present invention provides a method of inducing apoptosis in target cells of a subject by administering, to the subject a pharmaceutically effective amount of at least one compound of the formula: wherein: R1 is hydrogen, C1-C12 alkyl, C1-C12 substituted alkyl, C3-C7 heterocycle, or C3-C7 substituted heterocycle, R2 and R3 are independently H or C1-C12 alkyl, and the pharmaceutically acceptable salts, esters, amides, and prodrugs thereof, wherein following the administration of the compound of Formula I, the target cell is caused to undergo apoptosis.