Abstract: An automobile room lamp system is provided, which comprises a first circuit having a power source with positive and negative poles, a light emitting diode, a miniature incandescent bulb and a push switch, said light emitting diode, said miniature incandescent bulb and said push switch being connected in series between said positive pole and said negative pole; and a second circuit branching off from said first circuit between said light emitting diode and said miniature incandescent bulb and having a resistor provided on a negative pole side of said poser source, said resistor having a resistance value set at a level to allow said light emitting diode and said miniature incandescent bulb to be lighted with a high intensity when said push switch is closed and to allow said light emitting diode alone to issue dim light when said push switch is opened.

Abstract: A vehicle interior light system includes a lamp, an enclosure internally provided with the lamp, a lens attached to the front of the enclosure, a touch sensor arranged on the back surface of the lens, and a control circuit including a sensor circuit and a switching circuit. The sensor circuit is configured to detect the capacitance of a human body when the lens is touched or approached by a finger or the like. The switching circuit is configured to turn the lamp on and off in response to an output from the sensor circuit.

Abstract: An automobile room lamp system is provided, which comprises a first circuit having a power source with positive and negative poles, a light emitting diode, a miniature incandescent bulb and a push switch, said light emitting diode, said miniature incandescent bulb and said push switch being connected in series between said positive pole and said negative pole; and a second circuit branching off from said first circuit between said light emitting diode and said miniature incandescent bulb and having a resistor provided on a negative pole side of said poser source, said resistor having a resistance value set at a level to allow said light emitting diode and said miniature incandescent bulb to be lighted with a high intensity when said push switch is closed and to allow said light emitting diode alone to issue dim light when said push switch is opened.

Abstract: A push-button switch includes a fixed member having a first fixed contact strip disposed on the inner surface of the fixed member and a second fixed contact strip disposed on the inner surface of the fixed member and opposite the first fixed contact strip; a control member biased by a spring from the fixed member and locked in a desired position; and a movable contact strip configured, when attached to the control member locked in the desired position, to be in contact with and to short-circuit the first fixed contact strip and the second fixed contact strip. The movable contact strip is configured to be isolated from the first and second fixed contact strips at substantially the same time when the control member is controlled against a biasing force of the spring.

Abstract: A vehicle interior light system includes a lamp, an enclosure internally provided with the lamp, a lens attached to the front of the enclosure, a touch sensor arranged on the back surface of the lens, and a control circuit including a sensor circuit and a switching circuit. The sensor circuit is configured to detect the capacitance of a human body when the lens is touched or approached by a finger or the like. The switching circuit is configured to turn the lamp on and off in response to an output from the sensor circuit.

Abstract: A push-button switch includes a fixed member having a first fixed contact strip disposed on the inner surface of the fixed member and a second fixed contact strip disposed on the inner surface of the fixed member and opposite the first fixed contact strip; a control member biased by a spring from the fixed member and locked in a desired position; and a movable contact strip configured, when attached to the control member locked in the desired position, to be in contact with and to short-circuit the first fixed contact strip and the second fixed contact strip. The movable contact strip is configured to be isolated from the first and second fixed contact strips at substantially the same time when the control member is controlled against a biasing force of the spring.

Abstract: A power supply starting system which is capable of preventing faulty starting from being caused at the time of simultaneous startup and thus is improved in quality and reliability. Voltage converters each transform an input reference voltage and supply the transformed voltage to a load element. Simultaneous start signal generator generates a simultaneous start signal for simultaneously starting the voltage converters. Potential difference detector detects a potential difference between the input reference voltages. Forced starting unit inactivates the simultaneous start signal if the potential difference is detected, and forcedly starts the voltage converters after the potential difference becomes insignificant.

Abstract: A power supply starting system which is capable of preventing faulty starting from being caused at the time of simultaneous startup and thus is improved in quality and reliability. Voltage converters each transform an input reference voltage and supply the transformed voltage to a load element. Simultaneous start signal generator generates a simultaneous start signal for simultaneously starting the voltage converters. Potential difference detector detects a potential difference between the input reference voltages. Forced starting unit inactivates the simultaneous start signal if the potential difference is detected, and forcedly starts the voltage converters after the potential difference becomes insignificant.

Abstract: A pulse signal transmitting circuit generates a pulse signal having an enhanced high-frequency component with a reduced power loss. A pulse signal is transmitted to a load circuit through a transmission cable connected to a secondary winding of a transformer. First and second transistors are connected to a primary winding of the transformer. A voltage output from an external power source is input to the primary winding of the transformer when at least one of the first and second transistors is conductive so that a pulse voltage signal is input to the transformer. A booster power supply circuit is located between the external power source and a middle point of the primary winding of the transformer. The booster power supply circuit superimposes a boost voltage onto the voltage input to the primary winding of the transformer so that a high-frequency component of the pulse voltage signal input to the primary winding of the transformer is enhanced.

Abstract: A build-out Network (BON) built-in type balanced line driver circuit is provided. The (BON) built-in type balanced line driver circuit comprises a pair of transistors, the emitters of which are connected in common, and an impedance circuit connected between a power supply and respective collectors of the pair of the transistors. The impedance circuit has a reverse characteristic of the line characteristic of a balanced line connected between the collectors of the pair of transistors. The respective bases of the pair of transistors are supplied with unipolar data pulses (+DATA, -DATA).