Abstract: The invention relates to a high-pressure discharge lamp, in particular a vehicle headlight high-pressure discharge lamp, having a lamp base, in whose interior is arranged a starting apparatus for the purpose of starting the gas discharge in the high-pressure discharge lamp and which is provided with an electromagnetic shield, and having a discharge vessel which has an end near to the base and an end remote from the base, a power supply line protruding out of the end, remote from the base, of the discharge vessel being passed back to the lamp base and being electrically coupled to the electromagnetic shield. The electromagnetic shield is preferably connected to the ground reference potential of an operating device of the high-pressure discharge lamp.

Abstract: A vehicle lighting system receives power from a power supply and includes a lighting control module, a lamp, and a ballast having a bias control circuit. The lighting control module provides a remote enable signal to the ballast in response to an input. The bias control circuit of the ballast receives a supply voltage from a power supply and the remote enable signal and selectively energizes a bias regulator circuit of the ballast as a function of the remote enable signal. When the bias regulator circuit is energized, a controller of the ballast operates the ballast to provide power from the power supply to the lamp.

Abstract: The invention relates to a lamp for a vehicle headlamp with a low-beam function, which comprises an outer tube (3) and a light-emitting region (4) and which emits at least visible light of varying color from a number of regions of the outer tube (3), wherein at least a partial coating (2) is arranged on the outer tube (3) in such a way that, when implementing the low-beam function, the region of the traffic space which lies below the bright-dark cut-off (F) can be illuminated in defined regions with visible light of varying color.

Abstract: To control individually a plurality of loads to be turned on by combining a switching regulator with a charge pump circuit using some of the components of the switching regulator. An LED is controlled to be turned on by a switching regulator having an NMOS transistor connected to a transformer and a control circuit for generating an on/off signal. An LED is controlled to be turned on by a charge pump circuit that shares the NMOS transistor and the control circuit with the switching regulator to charge a condenser with an electric charge during an operation for turning on the NMOS transistor and discharge the electric charge accumulated in the condenser during an operation for turning off the NMOS transistor. Thus, circuit structure is simplified.

Abstract: An auxiliary lighting energy interruption system for use with snow plows and like front-mounted vehicle accessories is disclosed which facilitates the interconnection of such auxiliary lighting energy interruption systems to the lighting system of a vehicle upon which the vehicle accessory is mounted to provide power to and to control the auxiliary lights with the lighting system of the vehicle. The independent lighting energy interruption system provides first and second harness portions for respective installation on the vehicle and the vehicle accessory, with the first harness portion having a first configuration when it is not connected to the second harness portion and a second configuration when it is connected to the second harness portion. The first configuration allow the headlights on the vehicle to operate, while the second configuration allows only the headlights on the vehicle accessory to operate.

Abstract: A method of manually overriding automatic activation of an automatic headlight control system for a motor vehicle, headlamps operable in a high beam state and a low beam state, a high/low beam switch movable from a neutral position to a latched position and from a neutral position to a non-latched position for controlling the state of the headlamps and a headlamp on/off switch comprising a multi-position switch with at least a selectively automatic headlamp position is disclosed. The system includes forward-facing sensor for collecting light emanating from for instance a second vehicle, and a controller for controlling, when the headlamp switch is detected as being in the automatic headlamp position, the headlamp states as a function of the sensed intensity of the beam of light emanating from said second vehicle.

Abstract: A headlight beam control system includes an image taking apparatus for capturing an image to the rear of the user's vehicle and for generating image data from the captured image, a following vehicle information acquisition unit for acquiring following vehicle information from the image data, a passing action prediction unit for predicting a passing action based on the following vehicle information, a mode switching condition judgment unit for judging whether a mode switching condition is satisfied, based on the predicted passing action, and an automatic mode setting unit for switching the headlights between a high beam mode and a low beam mode when the mode switching condition is satisfied. When passing of the user's vehicle is predicted based on the following vehicle information, the headlights are switched from the high beam mode to the low beam mode.

Abstract: In a vehicle headlight apparatus, a projection unit having a same structure of an LED projector receives a light provided from a lamp. The projection unit generates and projects a projection image toward a vehicle front-area. A vehicle ECU has an image signal obtaining means for obtaining image signals representing a vehicle front-area image, a high brightness area determination means for analyzing the image signals in order to successively determine a high brightness area in the image signals, and a projection image determination means for determining a projection image so that the light, corresponding to the high brightness area and to be irradiated toward the vehicle front-area, becomes weak when compared with the light previously determined. Thereby, an intensity of the light to be irradiated to an object with a high reflection factor can be decreased. This can suppress decreasing of driver's frontal visibility.

Abstract: A discharge bulb and an arc tube are provided. The discharge bulb includes an arc tube main body having a discharge arc chamber, in which two discharge electrodes are disposed to oppose to each other; a tube portion disposed at each end portion of the arc tube main body, each of the tube portions being in communication with the discharge arc chamber and holding one of the discharge electrodes, wherein a wall for forming the discharge arc chamber has a taper portion whose diameter is reduced gradually from a cylinder portion of the arc tube main body in a center area to the tube portion of the arc tube main body, and an inner diameter Di of the cylinder portion is about 1.0 mm to about 2.5 mm, and a projection length Le of the discharge electrode into the discharge arc chamber is about 1.5 mm to about 2.5 mm.

Abstract: A switching device for switching between low beam mode and high beam mode of a xenon headlight, comprises an electromagnetic valve fixed on a fixing piece, two light-shield pieces pivotally coupled to the fixing piece, and moveable piece. The movable piece is moved by the electromagnetic valve and then drives the light-shield pieces to rotate to the gap of the fixing piece to obstruct the light beam of the xenon lamp tube, and thus the headlight is switched to the low beam mode. When the light-shield pieces are rotated away from the gap of the fixing piece by the movable piece, the headlight is switched to the high beam mode.

Abstract: The automated switching of a vehicle lighting system is to be made more reliable. To this end it is provided that the entire data flow from the sensors (S1, S2) to a lighting device, which receives the control signals from a transmission module (SM), is implemented in dual-track fashion throughout. This provides the corresponding redundancy and increases the required reliability. It is advantageous, in particular, to transmit to the lighting device a control signal (EIN) and a correspondingly negated signal (formula (I)), so that the lighting device is able to check whether the data processing and data transmission were free of faults.

Abstract: The invention relates to a low-beam headlight system for at least two motor vehicles, comprising a first illuminating device on a first vehicle and a second illuminating device on a second vehicle, each of the devices being provided with main road illuminating means. The first device furthermore comprises additional illuminating means directed laterally with respect to the longitudinal axis of said first vehicle emitting in a predetermined wavelength band, and the second device comprises an electronic road viewing equipment able to capture and retrieve an image of said road when it is illuminated in said predetermined wavelength band by said lateral illuminating means. The system furthermore comprises means of reducing the dazzling of said second vehicle when the additional illuminating means are activated and/or detected by the second device.

Abstract: A higher voltage out of a battery voltage applied to an ignition voltage terminal or a control voltage applied to a control voltage terminal is supplied to a switching regulator via a diode. Then, a supply of current to an LED in the switching regulator is controlled in compliance with the control voltage while using an input voltage as energy. When a PWM signal is input into a control voltage terminal as the control voltage, transistors are turned off and on, whereby an instruction to turn on the LED in a dimmed lighting mode is issued to the switching regulator. Then, a current that is smaller than that supplied in a full lighting mode is supplied to the LED.

Abstract: An apparatus for controlling operation of auxiliary equipment of a vehicle by receiving an output of a surroundings detection sensor for detecting the surrounding of the vehicle and an output of the vehicle information sensor, for detecting operation of the vehicle, wherein the distance to and the direction of an overtaking vehicle, an oncoming vehicle, or a preceding vehicle and the light intensities of the right and the left headlamps are controlled independently. A plurality of processes required for controlling the vehicle auxiliary equipment are performed by the time division processing.

Abstract: There is provided a high-voltage pulse generator with a reduced radius of rotation and improved performance, and a lighting apparatus and a vehicle having the high-voltage pulse generator. The high-voltage pulse generator includes a pulse transformer in which a primary winding and a secondary winding are wound on a core, a discharge lamp connector which is formed in a tube shape having an opened front surface and a bottom out of an insulating material and which has an inner-electrode terminal electrically connected to a high voltage part of the secondary winding in the bottom, and a pulse generating capacitor and a discharge switch electrically connected to the primary winding of the pulse transformer. The discharge lamp connector is disposed so that the center thereof is located in a center line passing through a substantial center in an axis direction (a direction parallel to a center line) of the pulse transformer and perpendicular to the axis direction.

Abstract: A reconfigurable auxiliary lighting energy interruption system for use with snow plows and like front-mounted vehicle accessories is disclosed which facilitates the interconnection of such systems to the lighting system of a vehicle upon which the vehicle accessory is mounted to provide power to and to control the auxiliary lights with the lighting system of the vehicle. The system provides first and second harness portions for respective installation on the vehicle and the vehicle accessory, with the first harness portion having a first configuration when it is not connected to the second harness portion and a second configuration when it is connected to the second harness portion. The first configuration allow the headlights on the vehicle to operate, while the second configuration allows only the headlights on the vehicle accessory to operate, with changes between the first and second configurations being accomplished without the need for a switch or a relay.

Abstract: A high-intensity discharge (HID) lamp comprising an inner bulb (1) with a discharge vessel (11) and an outer bulb (2), especially for application in an automotive headlight unit is disclosed. A lamp design is proposed by which high thermal stresses and increased quartz temperatures during run-up and steady state operation of the lamp are avoided so that the light output and the lifetime of the lamp is improved. This is substantially achieved by a positioning of the inner and the outer bulb (1, 2) such that a longitudinal axis of the inner bulb (1) is displaced in the operating position of the lamp above a longitudinal axis of the outer bulb (2) so that the distance between the discharge vessel (11) and the outer bulb (2) at the top side of the lamp is decreased and the distance between both at the bottom side is correspondingly increased.

Abstract: An imaging system for use in a vehicle headlamp control system includes an opening, an image sensor, a red lens blocking red complement light between the opening and the image sensor, and a red complement lens blocking red light between the opening and the image sensor. Each lens focuses light onto a different subwindow of the image sensor. The imaging system allows processing and control logic to detect the presence of headlamps on oncoming vehicles and tail lights on vehicles approached from the rear for the purpose of controlling headlamps. A light sampling lens may be used to redirect light rays from an arc spanning above the vehicle to in front of the vehicle into substantially horizontal rays. The light sampling lens is imaged by the image sensor to produce an indication of light intensity at various elevations. The processing and control logic uses the light intensity to determine whether headlamps should be turned on or off.

Abstract: A method for detecting surroundings by an automotive night vision system comprising several areas, including a detection area (3) in which surroundings related data is detected, an evaluation area within which the surroundings-related data detected by the night vision system is evaluated, and an area of representation in which information about the surroundings-related data detected therein is represented to the driver by an optical display unit. The area of representation is therefore restricted in the inventive method for detecting surroundings such that the area of representation comprises no more than the high beam area (2). The driver is shown only the surroundings related data which he/she would see anyway when actuating the conventional high beam due to the fact that the area of representation is restricted.

Abstract: A vehicle headlamp can include a daytime running lamp with favorable light distribution characteristics. The vehicle headlamp can also include a headlight such as a low beam/high beam, a fog lamp, and the like. The vehicle headlamp can include a parabolic type reflector, a halogen bulb, and a driving circuit. The halogen bulb can include a first filament, a second filament and a shield member if necessary or desired. The first filament can be used as the above headlight, and the second filament adjacent the first filament can be used as the daytime running lamp. Because the second filament can be located at a closer position than the first filament with respect to the reflector, light emitted from the second filament can form a wider light distribution than that of the first filament. Therefore, the vehicle headlamp can provide a daytime running lamp with a favorable light distribution pattern along with the above headlight.

Abstract: A method, a device and a processing unit for improving visibility in a motor vehicle are described, a light source of the motor vehicle illuminating an illumination range. At least one monitoring sensor of the motor vehicle monitors the surroundings around the motor vehicle for the presence of objects. The light source is adjusted in such a way that the spatial and/or temporal irradiation of the objects which are present at least with light having wavelengths outside of the visible spectrum, e.g., near infrared light, is less than a specifiable limiting value.

Abstract: A system and method of automatically controlling exterior vehicle lights includes an image sensor and a controller to generate control signals. The control signals are derived based on information obtained from the image sensor as well as other detected parameters pertaining to the detected light source(s), the vehicle having the inventive control system, and the ambient environment. The control circuit may simply turn certain exterior lights on or off, or change the brightness, aim, focus, etc. to produce various beam patterns that maximize the illuminated area in front of the vehicle without causing excessive glare in the eyes of other drivers.

Abstract: A circuit arrangement (1) for operating a high-pressure gas discharge lamp (2) is described. The circuit arrangement (1) has an igniting-circuit circuit arrangement (3) having a capacitor (C) able to be connected via two terminals (a3, a4, x1, x2) to a voltage supply unit (5), which capacitor (C) is connected in parallel with a primary winding (TP) of a transformer (T) by means of a switching element (SG) that becomes conductive above a given voltage. The circuit arrangement (1) also has a lamp-circuit circuit arrangement (4) in which the high-pressure gas discharge lamp (2) is connected on one side, via a secondary winding (TS) of the transformer (T), to a terminal (a1, x1) for connection to the voltage supply unit (5) and on the other side, via an inductive element, to a second terminal (a2, x2) for connection to the voltage supply unit (5).

Abstract: A headlight is turned on if an external illuminance value outside of the vehicle is equal to or lower than a first threshold value if the non-rainfall state is judged from windshield wiper activation, and is permitted to be turned on if the external illuminance value is equal to or lower than a second threshold value higher than the first predetermined illuminance value if the rainfall state is judged. When the vehicle is capable of being driven and the headlight is turned on, if an average illuminance value of the external illuminance value is equal to or higher than a predetermined value, then the second threshold value switches to the first threshold value. When the headlight is turned off, if the activation of the wiper has not been confirmed for a first predetermined period, then the second threshold value switches to the first threshold value.

Abstract: A control unit of a vehicular headlamp apparatus can selectively perform steering angle control and navigation-cooperative control. The steering angle control operates a drive mechanism based on a steering angle and a speed of a vehicle to control a headlamp's swivel angle. The navigation-cooperative control operates the drive mechanism using a navigation unit to control the swivel angle. When a current position of the vehicle reaches an entry control start point, the control unit starts navigation-cooperative control at the entry into a curved road. The control unit finds a target swivel angle based on a curvature radius and curved road direction information about the curved road. While the vehicle moves from the entry control start point to a curved road start point, the control unit operates the drive mechanism to gradually change the headlamp's swivel angle to the target swivel angle.

Abstract: An illuminator assembly is provided for supplying night vision illumination. The assembly includes a support housing and an infrared illumination source. An infrared reflector receives the radiation emitted from the infrared illumination source and reflects the infrared radiation in a first substantially collimated field of view and transmits visible light therethrough. A visible light reflector is located behind the infrared reflective mirror for receiving visible light transmitted through the infrared reflector and reflecting scattering the visible light in a second field of view.

Abstract: A lighting controller for a lighting device for a vehicle includes a semiconductor light source; a power source for supplying electric power; and control circuitry for receiving the electric power from the power source and controlling a current supplied to the semiconductor light source. The control circuitry determines an amount of time the semiconductor light source is in a turned on state and an amount of time the semiconductor light source is in a turned off state. The control circuitry controls a value of the current supplied to the semiconductor light source based on both the determined amount of time the semiconductor light source is in a turned on state and the determined amount of time the semiconductor light source is in a turned off state.

Abstract: Equipment on automotive vehicle is controlled by a system including at least one semiconductor light sensor having variable sensitivity to light. Each light sensor generates a light signal indicative of the intensity of light incident on the light sensor. Control logic varies the sensitivity of the light sensor and generates equipment control signals based on received light signals. Sensitivity of light sensors may be varied by changing the integration time for producing charge from light incident on light transducers, by selecting between light transducers of different sensitivity within the light sensor, by using a light transducer with a sensitivity that is a function of the amount of incident light, and the like. Controlled equipment includes devices such as automatically dimming rearview mirrors, headlamps, and moisture removal means.

Abstract: A surface plasmon resonance imaging system (40) and method is provided. The system (40) includes a light source (42) comprising a light-emitting diode (LED) array that is positioned at the focal point of a collimating lens (44). The light source (42) and collimating lens (44) are used to illuminate the substrate surface (50) at a range of angles dependent upon which one or more LEDs are lit. The substrate surface (50) receives light from the collimated lens (44) at a selected incident angle, which can be varied by selective illumination of one or more of the LEDs in the LED array. The system (40) further includes a detector (60) that is positioned such that it is capable of detecting an image reflected from the substrate surface (50).

Abstract: Ballast comprising input terminals receiving a DC voltage coming from a supply source on the vehicle, a chopping supply circuit functioning at a predetermined chopping frequency in order to supply as an output a voltage supplying the discharge lamp, and a filtering device disposed at the input and intended to reduce radio interference produced by the chopping supply circuit. The chopping supply circuit comprises at least one first filtering capacitor connected between the input terminals and a filtering choke connected in series between one of the input terminals and the chopping supply circuit. In accordance with the invention, the ballast comprises a filtering device which also comprises at least one second filtering capacitor in series with an additional choke. This second capacitor forms with the additional choke a resonance circuit situated between the input terminals and tuned to the chopping frequency.

Abstract: A light controller capable of varying the brightness of a light emitting diode in a linear manner. The light controller may control a number of lights in a predetermined pattern or in a pattern designed by the user. A remote control may be used to control and interact with the light controller. The light controller may have inputs for audio signals, tachometer signals, or other external signals. The light controller may be coupled to other light controllers to enable the control of additional lights in a synchronized manner. The light controller may be particularly well suited to controlling light emitting diodes and controlling lights in a vehicle accent lighting application, although many other uses may be apparent.

Abstract: A rainfall determination apparatus for determining rainfall based on data relating to a wiping operation of a wiper. The apparatus includes a detection device for detecting the wiping operation every time this operation is performed; a timer for starting to clock a predetermined period of time for each wiping operation; a counter for counting the number of times of the wiping operation performed before the predetermined period of time has elapsed; and a determination device for determining that rainfall occurs when the counter counts a predetermined number of times of the wiping operation which is successively performed. The timing of lighting the headlight of a vehicle can be changed in accordance with the result of the determination about the rainfall situation based on the wiping operation of the existing wiper. The apparatus is inexpensive and can be easily built in an automatic lighting system for vehicles, which is relatively expensive.

Abstract: A lighting system for a vehicle includes a lamp and a deciding circuit to detect the number of abnormal light emitting elements or the abnormal elements in the lamp. The deciding circuit may be connected to a disconnection detecting circuit by one signal line to detect an abnormality of a particular one light emitting element, wherein the disconnection detecting circuit is adapted to provide to the signal line a potential corresponding to the particular light emitting element whose disconnection is detected and the deciding circuit is adapted to identify the abnormal light emitting element on the basis of the potential of the signal line.

Abstract: A PWM signal generation circuit and a PWM control circuit are provided in which the duty ratio is easily changed and which can also avoid adverse impact from ambient temperature changes and the like. At the beginning of charging a capacitor with a current flow, a voltage level at a connection point between the negative input terminal of a comparator and the capacitor is still below a charging threshold. When the charging threshold is exceeded, the comparator is inverted to a low state and a current flows into an output point of the comparator to start discharging the capacitor. At the beginning of discharging from the capacitor, the voltage level at the connection point is still above the discharging threshold. However, when the voltage level falls below the discharging threshold, the comparator returns to a high state, and the charging operation again takes over.

Abstract: A light emitting diode (LED) display, including: drive circuitry; a control processor; a frame including two edges; multiple cables extending rigidly between the two edges of the frame; and at least one pixel module coupled to each cable. Each cable includes a power wire coupled to the drive circuitry, a ground wire, and at least one data bus wire coupled to the control circuitry. Each pixel module includes: a power electrode coupled to the power wire of the coupled cable; a ground electrode coupled to the ground wire of the coupled cable; a bus electrode coupled to the data bus wire of the coupled cable; an LED light source; and pixel control circuitry coupled to the electrodes and the LED light source. The pixel control circuitry is adapted to drive the LED light source with a drive current based on a control signal received from bus electrode.

Abstract: A vehicle lamp 10 is provided with a lamp unit 30 which applies beams of the desired patterns ahead, and a double axis actuator 50 having a first drive mode in which the lamp unit is rotated in one of two planes that are orthogonal to each other and a second drive mode in which the lamp unit is rotated in the other of the two planes. The double axis actuator is provided with a single output part 540 which rotates the lamp unit in the two planes, and a drive part (including a drive source 550 and a movable part 561) which drives the output part. The double axis actuator can rotate the lamp unit in the each plane regardless of the rotational positions along the above two planes.

Abstract: There is provided a vehicular lamp that can inform walkers or drivers in the other vehicles of the existence of the moving vehicle even where the circumference of the vehicle is bright by emitting a light amount larger than that of normal times when the circumference is bright. The vehicular lamp that is used for a vehicle includes a semiconductor light-emitting element, and a current controlling unit operable to increase an electric current flowing into the semiconductor light-emitting element according to a signal output from a sensor depending on a brightness of the circumference of the vehicle when the circumference of the vehicle is bright.

Abstract: An automatic lighting device includes an illuminance detector for detecting an external illuminance around a vehicle, a light controller for turning on/off a vehicular light, a driver's characteristics detector for acquiring information about driver's physical characteristics, and a threshold setting element for setting the illuminance threshold in accordance with the driver's physical characteristics. The controller turns on the light when the external illuminance is not more than the illuminance threshold.

Abstract: A current balance circuit is driven by a power source to balance currents flowing through a plurality of lamps. The current balance circuit includes a plurality of first balance transformers. The first balance transformers are electrically connected to the lamps respectively. The first balance transformers are connected in series.

Abstract: A charge pump circuit boosts a voltage of a battery so as to generate a drive voltage for an LED. A constant current circuit generates a constant current to feed through the LED. A monitoring circuit monitors a cathode potential of the LED, i.e., a voltage across the constant current circuit. A control circuit receives a result of monitoring from the monitoring circuit 110 and increases a step-up ratio of the charge pump circuit when the voltage across the constant current circuit drops below a minimum voltage that guarantees a constant current. The control circuit sets an externally requested constant current value in the constant current circuit. When a change from a large current to a small current is requested, the control circuit returns the step-up ratio of the charge pump circuit to 1.0.

Abstract: When an H signal of H/L binary signals is input into a control signal input terminal, a PWM signal is output from a multivibrator. When this PWM signal is input into a power supply circuit via a voltage converter circuit, such a control is repeated that a rated current flows through an LED at an ON time of the PWM signal and a supply of current to the LED is stopped at an OFF time of the PWM signal. An average current flowing through the LED is lowered and thus an emission of light is weakened, nevertheless an emitted light of the LED can be kept white because the rated current is supplied to the LED while the LED emits the light.

Abstract: A method for controlling a discharge lamp by a power controlling device on an automobile vehicle includes a starting step and a switching step. The device supplies electricity to the lamp. In the starting step, the discharge lamp starts to emit a light such that the device supplies a first electricity. In the switching step, the device switches from the first electricity to a second electricity so that the lamp maintains to emit the light with the second electricity, which is smaller than the first electricity. In the switching step, a temperature of the lamp is decreased with a temperature gradient, which is equal to or smaller than a predetermined gradient.

Abstract: There is provided a vehicular lamp that can be miniaturized by reducing signal lines connected to a vehicle main body.

Abstract: A power supply for discharge lamp includes a transformer and a current balance device, wherein the transformer includes a primary winding and a secondary winding and the current balance device is coupled between the secondary winding and a plurality of discharge lamps. The current balance device may include a single inductor wherein at least two windings are connected in series with each other and each serially-connected winding is coupled with a discharge lamp, and the other windings are respectively coupled with a discharge lamp. The current balance device may include two inductors wherein at least one winding of a first inductor is connected in series with at least one winding of a second inductor and each serially-connected winding is coupled with a discharge lamp, and the other windings of the first inductor and the other windings of the second inductor are respectively coupled with a discharge lamp.

Abstract: A discharge tube is driven by a multiple-phase drive circuit, and includes a discharge container having an internal discharge space and multiple electrodes that are secured to the discharge container and correspond to each phase of the multiple-phase drive circuit. The tips of the multiple electrodes protrude into the discharge space, and are oriented toward a predetermined single point of union. All of the electrodes located on one side of a virtual plane that includes the predetermined point of union. Furthermore, a discharge lamp having the discharge tube includes three electrodes, and electric discharge can take place between each pair of electrodes. When the discharge lamp is driven at maximum output, voltage is impressed to the three electrode terminals such that at least one of the voltages VeAB, VeBC, VeCA between the three electrode terminals will be in a discharge period.

Abstract: A wiring harness kit that includes a main extension portion and a utility extension portion. The main extension portion is electrically coupled at its first end to the host vehicle's electrical system. The utility extension portion electrically connects at one end to the second end of the main extension portion and is adapted to electrically couple at its other end to an electric load. The utility extension portion may include first and second segments, wherein the second segment includes a plurality of interchangeable adaptor sections each having a different connector for electrically coupling with the electric load.

Abstract: A discharge tube drive circuit for driving a plurality of discharge tubes is proposed with reduced number of parts and in a down-sized form. A first balance transformer is provided in a first drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the first drive circuit block and a secondary coil of the first balance transformer are connected in series. A second balance transformer is provided in a second drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the second drive circuit block and a secondary coil of the second balance transformer are connected in series. Further, a primary coil of the balance transformer and a primary coil of the second balance transformer are connected in series to configure the discharge tube drive circuit of the present invention.

Abstract: The invention provides an LED current balancing circuit, comprising a first and a second LED set coupled to a voltage source, a first transistor, and a second transistor. The first LED set comprises a first loader. The first transistor and the second transistor form a current balancing circuit for adjusting currents passing through the first and second LED sets.

Abstract: A lighting device with night light and human body sensing capability includes a first illumination device, a second illumination device, a sensor and a main body. The first illumination device is designed to illuminate a local predetermined area, and the second illumination device is designed to illuminate an entire predetermined area. The sensor comprises a first sensing member and a second sensing member. The first sensing member is to detect the illumination status of the predetermined area and to activate the first illumination device. The second sensing member is to detect a human body approaching and to activate the second illumination device. The main body is provided with fixtures to dismantle a cover for replacing the second illumination device.

Abstract: A mobile light is disclosed that produces a high level of illumination without glare using the DC power of a vehicle's battery and charging system. The mobile light uses a high-intensity discharge lamp with a control circuit that initially ignites the lamp using a voltage multiplier circuit and that maintains illumination of the lamp using an FET switching circuit that applies a lower AC voltage to the lamp. The microprocessor also periodically adjusts the power delivered to the lamp to compensate for adverse conditions, such as high temperatures within the work light, or a high or low DC input voltage. The microprocessor also periodically senses the level of illumination provided by the lamp and adjusts the voltage applied to the lamp accordingly.