Abstract: A constant voltage power supply circuit includes oscillation means; a step-up or step-down circuit including coil means and capacitive means; detecting means that detects an outputted voltage value of the step-up or step-down circuit, and compares the detected value with a predetermined reference value to output a detected information, at which either the detected value exceeds the reference value or becomes lower than the reference value; and control means that controls, based on the detected information of the detecting means, supply of the pulse signals outputted from the oscillation means to the step-up or step-down circuit.

Abstract: A lighting apparatus that can operate longer utilizing a battery is provided. A lighting apparatus comprises a battery, switch means, at least two types of light sources, the power consumption of each being different from each other, capable of being connected to the battery via the switch means, voltage detection means for detecting a voltage of the battery, and switch control means for controlling the switch means to switch the connection target of the battery between the at least two types of light sources in response to the output signal of the voltage detection means.

Abstract: Two types of rectangular waves having different numbers of driving pulses are applied to the HID bulb. By changing the combination of these two different types of rectangular waves to be supplied , the driving energy of the HID bulb is increased or decreased, thereby supply electric energy to the HID bulb is controlled accurately.

Abstract: In the present invention a lighting equipment driving means which make it possible to drive a light emitting means to emit light for a long time with high brightness even when a moving speed of a bicycle is at so low level of speed that a normal human being walks, is provided and in the light emitting means, the driving terminal 4, 4? of the small sized direct current motor 1 and the input terminals 7, 7? provided on a substrate plate 6 of the light emitting means 5 with the LED 15 are connected to each other directly via a pair of conduction wires 8, 8?, without interposing any one of a rectifier circuit and an electric energy storage circuit, wherein a rotor axis 2 of the small sized direct current motor 1 is rotated at high rotational speed to generate the electricity whereby said light generating means 5 emits light continuously and uniformly in high luminance condition.

Abstract: A protection cap is mounted to the top end part of a discharge bulb for a vehicle.

Abstract: Two types of rectangular waves having different numbers of driving pulses are applied to the HID bulb. By changing the combination of these two different types of rectangular waves to be supplied , the driving energy of the HID bulb is increased or decreased, thereby supply electric energy to the HID bulb is controlled accurately.

Abstract: A drive device for lighting equipment includes a rectifier circuit 2 that rectifies an output current of an alternating-current generator 1; a voltage converter circuit 3 that steps up or down a DC voltage of the rectifier circuit 2 to a predetermined voltage; and a semiconductor light-emitting device 51 that is driven by an output voltage of the voltage converter circuit 3.

Abstract: The high-intensity discharge lamps lighting apparatus includes an adjusting means that adjusts a pulse width of a rectangular-wave AC voltage. By controlling the pulse width of the rectangular-wave AC voltage using the adjusting means, the pulse width of the rectangular-wave AC voltage applied to the high-intensity discharge lamp is changed, thereby an emission color of the high-intensity discharge lamp can be adjusted.

Abstract: There is a vehicle headlamp in a multibeam mode comprising: a reflecting mirror for reflecting light emitted from a discharge tube having a single light emitting section; and a shield for blocking off light directly emitted forward and light emitted to the lower part of the reflecting mirror out of the light emitted from the discharge tube, wherein the headlamp includes a rotationally moving device for three-dimensionally moving the light emitting section of the discharge tube to any position of the reflecting mirror, which is suitable for low-beam or high-beam, by eccentrically rotating the discharge tube to move back and forth; and a rotation controller for controlling the rotation of the rotationally moving device. The headlamp can be used in several beam modes using a conventional reflection mirror and a discharge tube.

Abstract: There is a vehicle headlamp in a multibeam mode comprising: a reflecting mirror for reflecting light emitted from a discharge tube having a single light emitting section; and a shield for blocking off light directly emitted forward and light emitted to the lower part of the reflecting mirror out of the light emitted from the discharge tube, wherein the headlamp includes a rotationally moving device for three-dimensionally moving the light emitting section of the discharge tube to any position of the reflecting mirror, which is suitable for low-beam or high-beam, by eccentrically rotating the discharge tube to move back and forth; and a rotation controller for controlling the rotation of the rotationally moving device. The headlamp can be used in several beam modes using a conventional reflection mirror and a discharge tube.