Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is with positive refractive power and includes a convex surface facing an object side. The second lens is with negative refractive power. The third lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing an image side. The fourth lens is with negative refractive power. The fifth lens is with positive refractive power. The sixth lens is with positive refractive power and includes a convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged in order from the object side to the image side along an optical axis.

Abstract: A wide-angle lens assembly includes a first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses. The first and second lenses are meniscus lenses with negative refractive power. The third and seventh lenses are with negative refractive power. The sixth and tenth lenses are with positive refractive power. The fourth lens is a meniscus lens with positive refractive power. The fifth lens includes a convex surface facing an object side. The eighth lens includes a convex surface facing the object side. The ninth lens includes a concave surface facing the object side and a convex surface facing an image side. The first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lenses are arranged in order from the object side to the image side along an optical axis.

Abstract: A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens is a meniscus lens with refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is with refractive power. The third lens is with positive refractive power. The fourth lens is with refractive power. The fifth lens is with positive refractive power and includes a convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side to the image side along an optical axis.

Abstract: A lens apparatus includes a first lens group, a second lens group, a third lens group and a fourth lens group. The first lens group includes a first lens with negative refractive power and a second lens with negative refractive power. The second lens group includes a third lens with positive refractive power. The third lens group includes a fourth lens with positive refractive power. The fourth lens group includes a fifth lens with negative refractive power, a sixth lens with positive refractive power and a seventh lens with positive refractive power. The lens apparatus satisfies: ?2.28<fLG1/f<?0.59, where f is an effective focal length of the lens apparatus, and fLG1 is an effective focal length of the first lens group.

Abstract: A projection lens assembly includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in order from a projection side to an image source side along an optical axis. The first lens group is with negative refractive power. The second lens group is with positive refractive power and includes a projection side surface and an image source side surface, wherein both of the projection side surface and the image source side surface are convex surfaces. The third lens group includes a convex surface facing the projection side. The fourth lens group is with positive refractive power and includes a convex surface facing the image source side. The projection lens assembly satisfies: 1.4<F<3.5, wherein F is an F-number of the projection lens assembly.

Abstract: A projection lens assembly includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in order from a projection side to an image source side along an optical axis. The first lens group is with negative refractive power. The second lens group is with positive refractive power and includes a projection side surface and an image source side surface, wherein both of the projection side surface and the image source side surface are convex surfaces. The third lens group includes a convex surface facing the projection side. The fourth lens group is with positive refractive power and includes a convex surface facing the image source side. The projection lens assembly satisfies: 1.4<F<3.5, wherein F is an F-number of the projection lens assembly.

Abstract: A projection lens includes a first lens group and a second lens group, all of which are arranged in sequence from a projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes a first lens with negative refractive power. The second lens group is with positive refractive power and includes a second lens, a third lens, a fourth lens and a fifth lens, wherein the second lens is with positive refractive power, the third lens is with negative refractive power, the fourth lens is a concave-convex lens with positive refractive power and the fifth lens is with positive refractive power. The first lens group and the second lens group satisfy ?1.8<f1/f2<?1.42, wherein f1 is an effective focal length of the first lens group and f2 is an effective focal length of the second lens group.

Abstract: A light driver circuit device for synchronously driving a plurality of cold cathode fluorescent lamps (CCFLs) is provided. The light driver circuit device includes an inverter circuit board and a balance circuit board. The inverter circuit board has an inverter circuit coupled to a driving signal for outputting a driving voltage to drive the CCFLs synchronously. The balance circuit board and the inverter circuit board are installed separately, and the balance circuit board has a balance circuit coupled to a terminal of each CCFL and the inverter circuit. The CCFL driving architecture is designed to install the inverter circuit and the balance circuit individually, thus effectively reducing the space of the driving circuit and the total cost of the circuit design. Furthermore, the balance circuit board can balance the current in each CCFL effectively, and there is no limitation to where the balance circuit board can be disposed.

Abstract: Backlight module is disclosed. The backlight module includes a first lamp, a first voltage source, a second lamp, a second voltage source, a first external electrode, and a second external electrode. Both the first and the second voltage sources have a first terminal and a second terminal. The first voltage source is used to output a first voltage signal and electrically couples to the first terminal of the first lamp. The second voltage source is used to output a second voltage signal and electrically couples to the first terminal of the second lamp. Both the first external electrode and the second external electrode have a first terminal and a second terminal. The first terminal of the first external electrode electrically couples to the second voltage source and the first terminal of the second external electrode electrically couples to the first voltage source, wherein the first voltage signal and the second voltage signal are inverted.

Abstract: A signal regulator module includes a floating current regulator, a signal sensor, and a feedback controller. The floating current regulator is electrically coupled to a driving circuit and the light sources of a display panel for regulating the driving signals based on a feedback signal in a photo couple means. The signal sensor is electrically coupled to the floating current regulator for generating a corresponding voltage signal based on the driving signal through a photo couple means. The feedback controller is electrically coupled to the signal sensor and the floating current regulator for generating the feedback signal based on the voltage signal and outputting the feedback signal to the floating current regulator.

Abstract: A light driver circuit device for synchronously driving a plurality of cold cathode fluorescent lamps (CCFLs) is provided. The light driver circuit device includes an inverter circuit board and a balance circuit board. The inverter circuit board has an inverter circuit coupled to a driving signal for outputting a driving voltage to drive the CCFLs synchronously. The balance circuit board and the inverter circuit board are installed separately, and the balance circuit board has a balance circuit coupled to a terminal of each CCFL and the inverter circuit. The CCFL driving architecture is designed to install the inverter circuit and the balance circuit individually, thus effectively reducing the space of the driving circuit and the total cost of the circuit design. Furthermore, the balance circuit board can balance the current in each CCFL effectively, and there is no limitation to where the balance circuit board can be disposed.

Abstract: A light driver circuit device for synchronously driving a plurality of cold cathode fluorescent lamps (CCFLs) is provided. The light driver circuit device includes an inverter circuit board and a balance circuit board. The inverter circuit board has an inverter circuit coupled to a driving signal for outputting a driving voltage to drive the CCFLs synchronously. The balance circuit board and the inverter circuit board are installed separately, and the balance circuit board has a balance circuit coupled to a terminal of each CCFL and the inverter circuit. The CCFL driving architecture is designed to install the inverter circuit and the balance circuit individually, thus effectively reducing the space of the driving circuit and the total cost of the circuit design. Furthermore, the balance circuit board can balance the current in each CCFL effectively, and there is no limitation to where the balance circuit board can be disposed.

Abstract: A drive amplifier system includes a drive control device, a power supply, and at least one drive amplifier. The power supply includes a power control circuit, a rectifier, and a current sensor. The power control circuit includes an over-current detection circuit, a controller, and a state comparator. The drive amplifier includes a control circuit, a state memory, and an inverting circuit. When a actual current provided for the at least one drive amplifier by the power supply is more than a reference voltage, the over-current detection circuit outputs an over-current detection signal.

Abstract: A lamp drive circuit used for driving a number of lamps is provided. The lamps are used in a backlight module. The backlight module is used for providing a light source when a liquid crystal display displays. The lamps are respectively electrically connected to a coil. The coils have the same number of turns and have the same magnetic circuit, so that the currents flowing through the lamps are balanced.

Abstract: A lighting apparatus comprises a plurality of light sources, a power conversion circuit, a plurality of load-driving coils and a feedback generation coil. The power conversion circuit generates a driving signal for the load-driving coils to generate substantially identical driving currents for driving every light source. Furthermore, the feedback generation coil generates a feedback signal based on the inductions of the currents flowing though the plurality of load driving coils.

Abstract: A current detecting apparatus for detecting a current provided by a driver for a motor includes a resistor, a signal isolation module, and a processor. A first end of the resistor is connected to the driver, and a second end of the resistor is connected to the motor. A current provided by the driver passes through the resistor to drive the motor. The signal isolation module is connected between the first end and the second end of the resistor, to receive a voltage signal produced by the current passing through the resistor and isolate the voltage signal to output an isolated signal. The processor is connected to the signal isolation module, to receive the isolated signal and process the isolated signal to detect the current provided by the driver for the motor.

Abstract: A lamp current balance and feedback system and related method are disclosed for balancing the input and output currents of a lamp by making use of a lamp current balance and feedback mechanism. The operation of the lamp current balance and feedback mechanism includes coupling the input current of the lamp for generating a first balance current by a first transformer, coupling the output current of the lamp for generating a second balance current by a second transformer, coupling the first and second transformers for substantially equalizing the first and second balance currents, generating a feedback signal based on the first or second balance current by a feedback circuit, generating a pulse width modulation signal based on the feedback signal by a pulse width modulation signal generation circuit, and driving the input and output currents of the lamp based on the pulse width modulation signal by a driving circuit.

Abstract: A backlight system for use in an LCD display with a driver providing current sink control includes an LED array module, a current feedback circuit, and a current compensation circuit. The LED array module has N columns of LEDs and each LED column has M LEDs connected in serial, wherein the current feedback circuit includes N current feedback units and the current compensation circuit includes N current compensation units, both of the current feedback circuit and the current compensation circuit being electrically coupled to the LED array module. When the backlight system is in operation, a current passes through an LED column, a current feedback unit, and a current compensation unit to generate an output voltage that is used for comparison with a predetermined DC voltage, and the current is compensated based on the results of the comparison.

Abstract: A drive amplifier system includes a drive control device, a power supply, and at least one drive amplifier. The power supply includes a power control circuit, a rectifier, and a current sensor. The power control circuit includes an over-current detection circuit, a controller, and a state comparator. The drive amplifier includes a control circuit, a state memory, and an inverting circuit. When a actual current provided for the at least one drive amplifier by the power supply is more than a reference voltage, the over-current detection circuit outputs an over-current detection signal.

Abstract: A backlight module including a plurality of lamps, a first circuit board, and a second circuit board is provided. Each lamp has a first electrode and a second electrode. The first circuit board has a plurality of first openings and first conductive clips. The first electrode is disposed to extend through the first opening and to be clamped by the first conductive clip. Furthermore, a plurality of current adjustment devices is disposed on the first circuit board. The current adjustment device is electrically coupled to the first electrode through the first conductive clips. In the backlight module, the conductive clips or clamping pins of the current adjustment devices are used to hold the electrodes of lamps, thereby facilitating the assembly process of backlight module.