Abstract: A lighting device which causes a first light source to emit illumination light and a second light source to emit illumination light having a color temperature higher than a color temperature of the illumination light emitted by the first light source includes: an illuminator which includes a first switching element connected in series to the first light source, and a second switching element connected in series to the second light source; an illumination controller which controls the illuminator to place at least one of the first switching element and the second switching element into an off state; and a constant-current controller which detects a sum of values of currents flowing through the first light source and the second light source, and controls the first switching element and the second switching element based on the sum.

Abstract: A lighting device is provided that includes a lighting controller that controls a light emitter that emits illumination light. The lighting controller includes a first filter that converts a first signal waveform that is defined by a first piecewise linear curve and whose intensity repeatedly increases and decreases into a signal waveform having a smooth rounded curve, and outputs the converted signal waveform as a first output waveform. The lighting controller causes the light emitter to repeatedly increase and decrease the intensity of the illumination light in accordance with the first output waveform.

Abstract: A control circuit is configured to convert a DC voltage that is outputted from a DC power supply to a square wave voltage by switching the switching element according to a PWM signal having a duty ratio that corresponds to a light modulation level of the light source unit, and cause the square wave voltage to be outputted to the light source unit. The control circuit includes a voltage controller configured to control an operating voltage for operating the switching element such that at least one of a rising time and a falling time of a current that flows through the switching element is 1 microsecond or more.

Abstract: The light source unit includes a light source circuit including N (N?3) pairs of a light source group including one or more solid light emitting elements and a constant current circuit connected in series with the light source group to keep, constant, current flowing through the light source group, a full-wave rectification circuit for performing full-wave rectification on AC voltage, and a control circuit. The first pair is connected to the full-wave rectification circuit. The k-th (2?k?N) pair is connected in parallel with the constant current circuit of the (k?1)-th pair so that the light source groups of the k-th and (k?1)-th pairs are in series. The control circuit terminates operations of the constant current circuits of the N pairs or limits currents flowing through the light source groups of the N pairs in response to detection of light or a signal.

Abstract: A light source circuit includes light-emitting diodes and a constant current circuit that controls current flowing through light-emitting diodes to a fixed level. A DC power supply circuit outputs a DC voltage having a voltage value capable of causing light-emitting diodes to emit light. A light modulation control unit includes: a MOSFET electrically connected between DC power supply circuit and light source circuit; and a control circuit configured to control MOSFET. Control circuit is configured to turn MOSFET on and off with a duty ratio corresponding to a light modulation level such that DC voltage that is outputted from DC power supply circuit is converted to a square wave voltage, and the square wave voltage is outputted to light source circuit. The square wave voltage has an amplitude equal to the voltage value of the DC voltage that is outputted from DC power supply circuit.

Abstract: An illumination system includes: a first light-emitting element column including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series; a second light-emitting element column connected in parallel with the first light-emitting element column, and including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series; a constant current supply that supplies a constant current to the first light-emitting element column and the second light-emitting element column which are connected in parallel; a resistor that is connected in series with the first light-emitting element column, and detects a magnitude of current flowing through the first light-emitting element column; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the resistor.

Abstract: A control unit of a light source device after activation time is configured to turn on switches respectively connected in series with light sources, in prescribed order. The light source device and a lighting device are configured to transmit characteristics of the light sources, based on a voltage change depending on a pattern of on and off of the switches.

Abstract: A lighting device is configured such that only one of a first current control circuit and a charging current control circuit operates in any of operation modes from a first mode to a fourth mode. The lighting device is configured such that the first current control circuit and the charging current control circuit are not included in the same closed circuit.

Abstract: An illumination system includes: a first light-emitting element column in which one or more first light-emitting elements are serially connected; a second light-emitting element column connected in parallel with the first light-emitting element column, and in which one or more second light-emitting elements are serially connected; a constant current supply that supplies constant current to a light source unit including the first and second light-emitting element columns; a resistor that is connected in series with the first light-emitting element column, and detects magnitude of current flowing through at least the first light-emitting element column; a bypass circuit that passes, to the resistor, at least part of current flowing through the second light-emitting element column, when a predetermined condition is satisfied; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the r

Abstract: A control circuit is configured to convert a DC voltage that is outputted from a DC power supply to a square wave voltage by switching the switching element according to a PWM signal having a duty ratio that corresponds to a light modulation level of the light source unit, and cause the square wave voltage to be outputted to the light source unit. The control circuit includes a voltage controller configured to control an operating voltage for operating the switching element such that at least one of a rising time and a falling time of a current that flows through the switching element is 1 microsecond or more.

Abstract: A mucosal vaccine producing an antigen-specific mucosal IgA and a blood IgG in the levels capable of exerting an effective immune induction and an infection-preventing effect, which comprises: (a) an AD vehicle consisting of a synthetic peptide and a lipid(s), wherein the synthetic peptide consisting of the amino acid sequence KnLm (wherein n is 4 to 8 and m is 11 to 20); (b) a carboxylvinyl polymer; and, (c) an antigenic protein, in an amount incapable of producing a sufficient mucosal IgA and blood IgG for exerting an effective immune induction and an infection-preventing effect when used by itself. The mucosal vaccine of the invention has an antibody producing ability which is more potent than those of mucosal vaccines of the prior art, and as a result it can exert an excellent effect even with an extremely small amount of an antigen.

Abstract: A lighting device includes a power conversion unit, an impedance adjustment unit, a first control unit, and a second control unit. The power conversion unit is configured to convert input power to direct-current power used for a light source. The impedance adjustment unit is formed of a series circuit of a resistor element and a switch element and is coupled to the light source in parallel, relative to the power conversion unit. The second control unit is configured to cause the power conversion unit to operate, for each burst cycle, for an operation period which is not longer than the burst cycle, and increase and reduce the ratio of the operation period to the burst cycle. The first control unit is configured to make the switch element conductive for a predetermined adjustment period which is not longer than the operation period, during the operation period.

Abstract: A composition comprising the following composition: an AD vehicle including a synthetic peptide and a lipid, wherein the synthetic peptide includes the amino acid sequence KnLm (wherein n is 4 to 8 and m is 11 to 20), a carboxylvinyl polymer and an RSV antigen. The composition has an antibody producing ability which is further higher than that of a conventional mucosal vaccine, hence capable of exerting excellent anti-virus antigen-specific IgA antibody- and IgG antibody-inducing effect in the nasal wash and the serum, respectively, even with an extremely small quantity of an RSV antigen.

Abstract: The light source unit includes a light source circuit including N (N?3) pairs of a light source group including one or more solid light emitting elements and a constant current circuit connected in series with the light source group to keep, constant, current flowing through the light source group, a full-wave rectification circuit for performing full-wave rectification on AC voltage, and a control circuit. The first pair is connected to the full-wave rectification circuit. The k-th (2?k?N) pair is connected in parallel with the constant current circuit of the (k?1)-th pair so that the light source groups of the k-th and (k?1)-th pairs are in series. The control circuit terminates operations of the constant current circuits of the N pairs or limits currents flowing through the light source groups of the N pairs in response to detection of light or a signal.

Abstract: An illumination system includes: a first light-emitting element column including one of a single first light-emitting element or a plurality of first light-emitting elements connected in series; a second light-emitting element column connected in parallel with the first light-emitting element column, and including one of a single second light-emitting element or a plurality of second light-emitting elements connected in series; a constant current supply that supplies a constant current to the first light-emitting element column and the second light-emitting element column which are connected in parallel; a resistor that is connected in series with the first light-emitting element column, and detects a magnitude of current flowing through the first light-emitting element column; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the resistor.

Abstract: An illumination system includes: a first light-emitting element column in which one or more first light-emitting elements are serially connected; a second light-emitting element column connected in parallel with the first light-emitting element column, and in which one or more second light-emitting elements are serially connected; a constant current supply that supplies constant current to a light source unit including the first and second light-emitting element columns; a resistor that is connected in series with the first light-emitting element column, and detects magnitude of current flowing through at least the first light-emitting element column; a bypass circuit that passes, to the resistor, at least part of current flowing through the second light-emitting element column, when a predetermined condition is satisfied; and a current adjuster circuit that adjusts the magnitude of the current flowing through the first light-emitting element column, according to the magnitude of the current detected by the r

Abstract: The lighting device according to the present invention includes a power supply circuit, a temperature detection circuit, and a temperature control circuit. The power supply circuit supplies operation power to a light source including a solid state light emitting device. The temperature detection circuit measures a surrounding temperature of the light source and outputs the measured surrounding temperature as a detection temperature. The temperature control circuit determines whether an increase rate of the surrounding temperature exceeds a predetermined criterion value. When determining that the increase rate exceeds the criterion value, the temperature control circuit performs a process of decreasing a temperature of the light source.

Abstract: An electronic ballast includes an AC-DC converter, a DC-DC converter, a cooling device and a power supply. The cooling device is configured to cool the light source. The power supply includes a first power supply configured to generate a first operating voltage from a first voltage obtained from a chopper circuit included in the AC-DC converter to supply the first operating voltage to at least one of the AC-DC converter and the DC-DC converter. The power supply further includes a second power supply configured to generate a second operating voltage from a second voltage obtained from the chopper circuit to supply the second operating voltage to at least the cooling device of the AC-DC converter, the DC-DC converter and the cooling device.

Abstract: An illumination device includes a main light source block having a plurality of main light sources and a plurality of current limiters, and an auxiliary light source block having an auxiliary light source and a constant-current unit. A series circuit of the auxiliary light source and the constant-current unit is electrically connected in parallel with the main light source block, between first and second output terminals of a rectifier. A smoothing capacitor is electrically connected in parallel with a specific main light source among the plurality of main light sources. The specific main light source and a corresponding current limiter are electrically connected in parallel with the series circuit of the auxiliary light source and the constant-current unit.

Abstract: A controller circuit is configured to adjust the number of light-emitting diodes that a current flows from a rectifier circuit through so that: the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes increases according to a value of a pulsating voltage during a time period that the value of the pulsating voltage increases; and the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes decreases according to the value of the pulsating voltage during a time period that the value of the pulsating voltage decreases. Light-emitting diodes, which start to emit light by a higher voltage value, of the plurality of light-emitting diodes are disposed at a position nearer to an outside of a mounting region of a substrate than light-emitting diodes, which start to emit light by a lower voltage value, of the plurality of light-emitting diodes.