Matsushita Electric Industrial Co., Ltd.

Yoko Shimomura

Masanori Shimizu

Hideo Nagai

Nobuyuki Matsui

Tetsushi Tamura

Yoshinori Tanabe

Takeshi Arakawa

Satoshi Kominami

Koji Miyazaki

Kazuaki Ohkubo

Kenjiro Hashimoto

Kohei Enchi

Kazuaki Okubo

Hiroyuki Uchiyama

An illumination light source includes four different types of LEDs, namely a blue light-emitting diodeemitting blue light, a blue-green light-emitting diodeemitting blue-green light, an orange light-emitting diodeemitting orange light and a red light-emitting diodeemitting red light.

Light source having blue, blue-green, orange and red LED's

An illumination light source includes four different types of LEDs, namely a blue light-emitting diode emitting blue light, a blue-green light-emitting diode emitting blue-green light, an orange light-emitting diode emitting orange light and a red light-emitting diode emitting red light. Thus, an illumination light source having high efficiency and high color rendering performance is provided.

Illumination light source

A self-ballasted electrodeless discharge lamp of the invention is provided with a discharge vessel filled with discharge gas, the discharge vessel having a cavity portion, a coil inserted into the cavity portion of the discharge vessel, a ballast circuit for supplying high frequency power to the coil, and a lamp base that is electrically connected to the ballast circuit, wherein the discharge vessel, the coil, the ballast circuit, and the lamp base are configured as a single unit, and a reflective tape for reflecting light that is radiated from the discharge gas and emitted from inside the discharge vessel to its cavity portion side is wound around the coil.

Self-ballasted electrodeless discharge lamp and electrodeless discharge lamp operating device

An LED lamp includes blue and red LEDs and a phosphor. The blue LED produces an emission at a wavelength falling within a blue wavelength range. The red LED produces an emission at a wavelength falling within a red wavelength range. The phosphor is photoexcited by the emission of the blue LED to exhibit a luminescence having an emission spectrum in an intermediate wavelength range between the blue and red wavelength ranges.

Led lamp

A fluorescent lamp includes: an emission tube for generating a luminous flux; a first filament provided at one end of the emission tube; a second filament provided at another end of the emission tube; first current regulator having a first impedance; a first electrode pin coupled to one end of the first filament via the first current regulator; a first switch coupled in parallel to the first current regulator; a second switch; a second electrode pin coupled to another end of the first filament via the second switch; and a control circuit for controlling the first switch and the second switch so as to be opened or closed. The control circuit doses the first switch and the second switch before the fluorescent lamp is lit and during a nominal lighting period after the fluorescent lamp is lit, and opens the first switch and the second switch during a power conservation lighting period following the nominal lighting period.

Fluorescent lamp and power converter

A fluorescent lamp of the present invention includes: a first electrode section having a first filament; a second electrode section having a second filament; a fluorescent tube in which a fluorescent substance Is applied on an inner wall of the fluorescent tube; a first structure of a nonconductor provided in the fluorescent tube: and a second structure of a conductor provided in the fluorescent tube. The first structure and the second structure are provided between the first filament and the second filament.

Growing community of inventors

Nara, Japan

Yoko Shimomura