摘要:
According to one embodiment, a light source is mounted on one side of a base body, a cap is mounted on the other side of the base body and a lighting circuit is mounted in the cap. In the cap, a circumferential portion is formed, and a projection portion being projected from the other side of the circumferential portion and having an inner space opened to the one side is formed. The lighting circuit has a substrate and a plurality of components mounted on the substrate. The components include a first component group mounted on a center portion of the substrate and having a height stored in the projection portion and a second component group mounted on a peripheral portion of the substrate and having a smaller height stored in the circumferential portion.
摘要:
According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply and a power-supply-voltage converting section. The power-supply-voltage converting section includes a plurality of power-supply-voltage converting circuits provided between the rectifying circuit and a plurality of output sections to which loads are respectively connected. Switching elements configured to convert a power supply voltage rectified by the rectifying circuit and supply the power supply voltage to the loads are provided in the plurality of power-supply-voltage converting circuits. The switching elements of the plurality of power-supply-voltage converting circuits are set to at least two different switching frequencies and turned on and off with the respective switching frequencies fixed.
摘要:
A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.
摘要:
A light-emitting module includes a module substrate, semiconductor light-emitting elements and a connection substrate. On one face of the module substrate, a conductive layer is formed. The semiconductor light-emitting elements and the connection substrate are mounted on the conductive layer of the module substrate. Electric wires, which extend from a lighting circuit, are connected to the connection substrate. Power is supplied to the semiconductor light-emitting elements through the connection substrate and the conductive layer of the module substrate.
摘要:
A light-emitting module includes a module substrate, semiconductor light-emitting elements and a connection substrate. On one face of the module substrate, a conductive layer is formed. The semiconductor light-emitting elements and the connection substrate are mounted on the conductive layer of the module substrate. Electric wires, which extend from a lighting circuit, are connected to the connection substrate. Power is supplied to the semiconductor light-emitting elements through the connection substrate and the conductive layer of the module substrate.
摘要:
When a discharge lamp is preheated, impedance of a filament electrode of the discharge lamp is computed. In accordance with the computed impedance, preheating and lighting of the discharge lamp are controlled.
摘要:
The electrodes of a discharge lamp are prevented from reaching damaging temperatures which tend to occur when the discharge lamp is near the end of its useful life. The combination of a discharge lamp and luminaire contribute to ensuring the discharge lamp remains unilluminated when nearing the end of its useful life to prevent high temperature damage. Load circuit characteristics are set to provide low release voltage and high short-circuit current during full-intensity illumination, and high release voltage and low short-circuit current during dimmed operation. The discharge lamp operating in a dimmed mode at the end of its useful life is switched to full-intensity illumination mode to ensure the discharge lamp becomes unilluminated. This configuration prevents high temperatures at the electrodes from damaging the glass bulb, base, socket and other components of the discharge lamp and luminaire.
摘要:
According to one embodiment, a luminaire includes a light-emitting module, a first lighting circuit and a back-flow preventing circuit. The light-emitting module includes a light-emitting element and a capacitive element. The first lighting circuit is supplied with power from the first power supply and is configured to activate the light-emitting element. The back-flow preventing circuit interrupts current flowing in a direction from the capacitive element to the first lighting circuit.
摘要:
Both ends of a lamp body are mounted on sockets of an apparatus body and a feeding unit configured to feed power to LEDs is provided on the back side facing the apparatus body of the lamp body.
摘要:
A self-ballasted lamp includes: a base body; a light-emitting module and a globe which are provided at one end side of the base body; a cap provided at the other end side of the base body; and a lighting circuit housed between the base body and the cap. The light-emitting module has light-emitting portions each using a semiconductor light-emitting element, and a support portion projected at one end side of the base body, and the light-emitting portions are disposed at least on a circumferential surface of the support portion. A light-transmissive member is interposed between the light-emitting module and an inner face of the globe.