LUMINAIRE

• US 20120326614A1
• Filed: 03/05/2012
• Published: 12/27/2012
• Est. Priority Date: 06/27/2011
• Status: Abandoned Application

• Current Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Kamata, Masahiko, Kawagoe, Makoto, Tsuji, Toshio, Hiraoka, Toshiyuki, Inoue, Masaru, Tano, Noritaka, Tomiyama, Kazuya
• Application Number:
  US13/411,758
• Publication Number:
  US 20120326614A1
• Time in Patent Office: Days
• US Class Current: 315/200.R
• CPC Class Codes: H02J 9/065 for lighting purposes
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light

Abstract

According to one embodiment, a luminaire includes a dim lighting circuit, an emergency unit, a dimming-signal input section, and a dimming control circuit. The dim lighting circuit dimly lights a light source at a dimming ratio corresponding to a dimming signal. The emergency unit includes a charging circuit for charging a battery with an external power supply in a normal time and supplies a power supply of the battery to the dim lighting circuit in an emergency. The dimming-signal input section receives the input of the dimming signal from the outside. The dimming control circuit gives the dimming signal input from the dimming-signal input section to the dim lighting circuit in a normal time and gives a dimming signal having a dimming ratio for an emergency to the dim lighting circuit in an emergency.

Claims

1. A luminaire comprising:

a dim lighting circuit configured to dimly light a light source at a dimming ratio corresponding to a dimming signal;

an emergency unit including a charging circuit for charging a battery with an external power supply in a normal time and configured to supply a power supply of the battery to the dim lighting circuit in an emergency;

a dimming-signal input section configured to receive input of the dimming signal from an outside; and

a dimming control circuit configured to give the dimming signal input from the dimming-signal input section to the dim lighting circuit in a normal time and give a dimming signal having a dimming ratio for an emergency to the dim lighting circuit in an emergency.

2. The luminaire according to claim 1, wherein the dim lighting circuit includes a common power-supply input section configured to receive input of an alternating-current power supply as the external power supply in a normal time and receive input of a direct-current power supply from the battery in an emergency, the dim lighting circuit being capable of dimly lighting the light source with either the alternating-current power supply or the direct-current power supply input to the common power-supply input section.

3. The luminaire according to claim 1, wherein

the dim lighting circuit dimly lights the light source at a dimming ratio corresponding to a direct-current voltage value of the dimming signal, and

the dimming control circuit gives a dimming signal of a direct-current voltage value input from the dimming-signal input section to the dim lighting circuit in a normal time and gives a dimming signal of a direct-current voltage value corresponding to the dimming ratio for an emergency to the dim lighting circuit in an emergency.

4. The luminaire according to claim 1, further comprising a lamp device including the light source and the dim lighting circuit.

5. The luminaire according to claim 1, further comprising a lamp device including the light source, the dim lighting circuit, and the emergency unit.

6. A luminaire comprising:

an emergency unit including a charging circuit for charging a battery with an external power supply in a normal time and configured to supply a direct-current power supply of the battery to a light source side in an emergency;

a dimming-signal input section configured to receive input of a dimming signal from an outside; and

a lamp device including a common power-supply input section configured to receive input of an alternating-current power supply in a normal time and receive input of the direct-current power supply from the battery in an emergency, an AC/DC determining circuit configured to determine which of the alternating-current power supply and the direct-current power supply a power supply input to the power-supply input section is, and a dim lighting circuit configured to dimply light, if the power supply input to the power-supply input section is the alternating-current power supply, the light source at a dimming ratio corresponding to a dimming signal input from the dimming-signal-input section and dimly light, if the power supply input to the power-supply input section is the direct-current power supply, the light source at a dimming ratio for an emergency set in advance.