Toshiba Lighting & Technology Corporation

Fumie Iwata

Hitoshi Kawano

Shigehisa Kawatsuru

Makoto Kawagoe

Tomoko Ishiwata

Yoko Noguchi

Takashi Nakamura

Takayuki Ono

Hidenori Nishigaki

Junko Takahashi

Masaru Inoue

Katsusuke Uchino

Kazunori Yashiro

According to one embodiment, a lighting control system includes a plurality of luminaire, a sensor device, a luminance sensor, and a lighting control unit. The luminaires are set in a lighting space. The sensor device detects presence of a person in the lighting space. The luminance sensor detects indirect luminance in a predetermined position in the lighting space by the luminaire. The lighting control unit subjects the luminaire to lighting control such that the indirect luminance detected by the luminance sensor does not fall below a predetermined value in a position where the sensor device detects presence of the person.

Lighting control system and lighting control method

According to one embodiment, a luminaire is provided which can enhance the feeling of brightness of a space and can reduce glare. The luminaire includes an equipment mounted on a ceiling surface. The equipment includes a light source and a light control unit. When an amount of light emitted outside from the equipment is an equipment luminous flux, and a direction right under the equipment has a luminous intensity distribution angle of 0&#xb0;, the light control unit controls to cause a luminous flux falling within a range of a luminous intensity distribution angle of 90&#xb0; to 120&#xb0; to be 20% or more of the equipment luminous flux and to cause a luminous flux falling within a range of a luminous intensity distribution angle of 60&#xb0; to 90&#xb0; to be 20% or less of the equipment luminous flux.

Luminaire controlling a luminous intensity distribution

Plural luminaires are installed in a lighting space surrounded by a wall part. A sensor equipment detects existence or nonexistence of a person in the lighting space. If existence of a person in the lighting space is detected, the sensor equipment detects a direction of the person. The sensor equipment detects a distance between the wall part positioned in front of the direction of the person and the person. A lighting control unit selectively switches between a first control for performing lighting control of the luminaires to illuminate the wall part positioned in front of the direction of the person if the detected distance is a specified distance or less, and a second control for performing lighting control of the luminaires to reduce brightness at a place as the place becomes farther from a position of the person if the detected distance is larger than the specified distance.

Growing community of inventors

Kanagawa, Japan

Fumie Iwata