Abstract: An automotive lamp includes: a light source; a light emitting member that receives light from the light source and emits light; and a support member that supports the light emitting member. The support member includes a translucent light emitting member accommodating unit. The light emitting member accommodating unit includes a recess in which the light emitting member is accommodated. A light incidence surface and side surfaces of the light emitting member are in contact with the light emitting member accommodating unit in a state in which the light emitting member is accommodated in the recess.

Abstract: A light source module includes a light source with a light emitting device and a terminal electrically connected to the light emitting device; a wiring board to electrically connect another end side of the terminal to an external power supply terminal; a thermal diffusion member between the light source and the wiring board; and a temperature detector mounted on the wiring board to detect a temperature of the light source. The thermal diffusion member has a recessed portion facing the wiring board, the temperature detector is accommodated in the recessed portion.

Abstract: A current detection circuit generates a current detection signal VCS that corresponds to a lamp current ILAMP supplied from a switching converter to a semiconductor light source. A hysteresis comparator compares a current detection signal VCS with an upper-side threshold signal VTHH and a lower-side threshold signal VTHL determined according to an analog dimming signal, and generates a control pulse SCNT that corresponds to the comparison result. A driver drives a switching transistor according to the control pulse. A PWM dimming circuit generates a gradual change signal by dulling a PWM (pulse width modulation) dimming signal, and changes the analog dimming signal based on the gradual change signal.

Abstract: A light source module includes light source having a light emitting element, a stem configured to support the light emitting element, and a terminal, one end side of which is electrically connected to the light emitting element, a wiring portion to which the other end of the terminal is electrically connected and which is configured to electrically connect the terminal to an external power supply terminal, a connection portion configured to fix the wiring portion and the other end side of the terminal by a connection member, and a thermal diffusion member disposed between the stem and the connection portion and thermally connected to the light emitting element, the terminal has a bent portion which is deformed in accordance with dimensional change in at least one of the thermal diffusion member, the terminal, the wiring portion and the connection member.

Abstract: There is provided a vehicle lamp includes a first light source part, a second light source part, a scanning optical system which scans an emission beam from the first light source part by repeating a periodical motion, and a lighting circuit which independently drives the first light source part and the second light source part. A scanning beam scanned by the scanning optical system is projected to form a first pattern, and an emission beam from the second light source part is projected to form a second pattern.

Abstract: To provide a lithium ion secondary battery that is less likely affected by vibration, shock, or the like. A stacked lithium ion secondary battery is characterized in that separators, which are stacked with positive and negative electrodes, are a flat bag or flat tube with at least one side of an outer periphery thereof intermittently heat-sealed; the heat-sealed side is provided with concave and convex portions made up of straight lines or curves or a combination of straight lines and curves; the outer periphery of the separator made with the concave and convex portions is positioned outside the outer periphery of the negative electrode along with the concave and convex portions; and the outer periphery of the negative electrode is positioned outside the outer periphery of the positive electrode housed in the bag-shape or tubular separator.

Abstract: A buck converter supplies a drive current to a light source and is feedback-controlled so that the drive current comes close to a target current. An open-circuit detection circuit compares a potential difference between and input voltage and an output voltage of the buck converter with a threshold voltage.

Abstract: A lighting circuit is configured to drive a light source including a plurality of light emitting elements connected in series. The lighting circuit includes a plurality of bypass switches respectively connected in parallel to the light emitting elements, a switching converter, and a converter controller configured to (i) stabilize a lamp current generated by the switching converter to a first target amount in a lighting-on state where at least one of the plurality of light emitting elements is turned on, and to (ii) stabilize the lamp current to a second target amount smaller than the first target amount in a complete lighting-off state where all of the plurality of light emitting elements are turned off.

Abstract: A vehicular lamp of the present disclosure supports a light-on mode for flickering a light source. A driving unit flickers the light source. An abnormality circuit asserts an abnormality detection signal while a predetermined state indicative of an abnormality state is detected during the light-on of the light source. A timer circuit (i) advances clocking while the abnormality detection signal is asserted, during the light-on of the light source, and resets clocking when the abnormality detection signal is negated; (ii) maintains the clocked time during an immediately preceding light-on period while the light source is turned off; and (iii) asserts a fail signal when the clocked time reaches a predetermined determination time.

Abstract: A drive circuit is configured to drive a light emitting unit which is provided in a vehicle lamp and includes a plurality of semiconductor light emitting elements connected in series. The drive circuit includes a drive voltage generation unit configured to reduce an input voltage from a battery to generate a drive voltage for driving the semiconductor light emitting elements, and a control unit configured to perform ON/OFF control for a bypass switch connected in parallel to a part of the semiconductor light emitting elements and to perform interlock dimming control when the input voltage becomes a first threshold value or lower. The interlock dimming control selects a dimming mode and increases an ON ratio per unit time of the bypass switch as the input voltage drops in the dimming mode.

Abstract: A drive circuit for a motor is used in a light scanning vehicular lamp. The drive circuit includes an output stage, a pre-driver that controls the output stage, a clamp circuit that generates intermediate voltage that is limited so as not to exceed given voltage, and a booster circuit that receives the intermediate voltage and supplies internal power-supply voltage higher than the intermediate voltage to a power supply terminal of the pre-driver.

Abstract: A lighting circuit includes a control unit that selects one of an extinguishing mode and a plurality of lighting modes based on a first control signal and a second control signal, and a drive unit. The control unit is configured to i) select the extinguishing mode when at least one of the first control signal and the second control signal is a non-pulse signal, and ii) select one of the plurality of lighting modes based on the combination of the duty ratio of the first control signal and the duty ratio of the second control signal, when both the first control signal and the second control signal are pulse signals.

Abstract: A light source module includes light source having a light emitting element, a stem configured to support the light emitting element, and a terminal, one end side of which is electrically connected to the light emitting element, a wiring portion to which the other end of the terminal is electrically connected and which is configured to electrically connect the terminal to an external power supply terminal, a connection portion configured to fix the wiring portion and the other end side of the terminal by a connection member, and a thermal diffusion member disposed between the stem and the connection portion and thermally connected to the light emitting element, the terminal has a bent portion which is deformed in accordance with dimensional change in at least one of the thermal diffusion member, the terminal, the wiring portion and the connection member.

Abstract: A lighting circuit includes a control unit that selects one of an extinguishing mode and a plurality of lighting modes based on a first control signal and a second control signal, and a drive unit. The control unit is configured to i) select the extinguishing mode when at least one of the first control signal and the second control signal is a non-pulse signal, and ii) select one of the plurality of lighting modes based on the combination of the duty ratio of the first control signal and the duty ratio of the second control signal, when both the first control signal and the second control signal are pulse signals.

Abstract: A method of manufacturing a lithium-ion secondary battery of the present invention includes at least four steps as follows: an initial charging step of charging the lithium-ion secondary battery, which has not been subjected to initial charging, under a temperature environment ranging of equal to or higher than ?20° C. and equal to or lower than 15° C.; an aging step of leaving the lithium-ion secondary battery under a temperature environment ranging of equal to or higher than 30° C. and equal to or lower than 80° C. after the initial charging step; a short circuit detecting step of detecting the presence or absence of a short circuit of the lithium-ion secondary battery by measuring a voltage drop quantity of the lithium-ion secondary battery and comparing the voltage drop quantity with a reference value; and a sorting step of sorting out a lithium-ion secondary battery in which no short circuit is detected.

Abstract: A converter controller controls a switching converter. A current detection circuit generates a current detection signal VCS that corresponds to a coil current IL of the switching converter. An error amplifier amplifies the difference between the current detection signal VCS and an analog signal VADIM that indicates a current to be supplied to a semiconductor light source, so as to generate an error signal VERR. A hysteresis comparator compares the current detection signal VCS with an upper threshold signal VTHH and a lower threshold signal VTHL determined according to the error signal VERR, and generates a control pulse SCNT that corresponds to a comparison result. A driver drives a switching transistor according to the control pulse SCNT.

Abstract: A lighting circuit utilizes a buck converter that supplies a drive current to a light source and is feedback-controlled so that the drive current comes close to a target current. An open-circuit detection circuit compares a potential difference between and input voltage and an output voltage of the buck converter with a threshold voltage.

Abstract: A lighting circuit for a light source includes a drive circuit that supplies a lamp current to the light source, detects the lamp current, and executes feedback control such that the lamp current approaches a target current, and an overcurrent protection circuit that is inserted between the drive circuit and the light source and that restricts the lamp current flowing into the light source so that the lamp current does not exceed an overcurrent threshold value. The overcurrent protection circuit includes a transistor, an inductor, a rectifier, a current sensor that generates a current detection signal according to the lamp current, and an overcurrent protection controller that controls ON/OFF of the transistor based on the current detection signal and the overcurrent threshold value. The transistor, the inductor and the rectifier are disposed in a T-shape.

Abstract: A light source module includes light source having a light emitting element, a stem configured to support the light emitting element, and a terminal, one end side of which is electrically connected to the light emitting element, a wiring portion to which the other end of the terminal is electrically connected and which is configured to electrically connect the terminal to an external power supply terminal, a connection portion configured to fix the wiring portion and the other end side of the terminal by a connection member, and a thermal diffusion member disposed between the stem and the connection portion and thermally connected to the light emitting element, the terminal has a bent portion which is deformed in accordance with dimensional change in at least one of the thermal diffusion member, the terminal, the wiring portion and the connection member.

Abstract: A film-covered battery houses, in a film covering material 4 obtained by stacking a heat sealing layer 13, a barrier layer 12, and a protective layer 11, a battery element 6 obtained by arranging positive and negative electrodes through separators and has a sealing portion that seals a periphery of the film covering material 4 housing the battery element 6. The sealing portion 18 includes an agglomeration/sealing portion 19 and a first interface bonding portion 15 provided so as to be adjacent to the battery element housing portion side of the agglomeration/sealing portion.