Illumination device

• US 8,755,918 B2
• Filed: 11/25/2009
• Issued: 06/17/2014
• Est. Priority Date: 11/25/2008
• Status: Expired due to Fees

• Current Assignee: ROHM Co., Ltd.
• Original Assignee: ROHM Co., Ltd.
• Inventors: Osawa, Hideharu, Tanaka, Masahide
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): PHAM, THAI N
• Application Number:
  US13/128,921
• Publication Number:
  US 20110230984A1
• Time in Patent Office: 1,665 Days
• Field of Search: 315/34, 315/149, 315/291, 315/307, 315/308, 340/815.45, 700/90, 700/275, 700/295, 700/296, 700/297
• US Class Current: 700/90
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/3578 Emulating the electrical or functional characteristics of discharge lamps
• CPC Class Codes: H05B 47/185 via power line carrier transmission

Abstract

The exchange time information to be acquired from an LED illumination lamp by an illumination instrument or the exchange time information to be stored by the illumination instrument itself is recognized by a controller via an ON/OFF control-dedicated switch control line or a general-purpose power line. The exchange time information is acquired in an OFF period of the LED illumination lamp ON-period noise. The exchange time information acquisition function is checked on a daily basis so as to cope with an alarm after a long period. The exchange time check result is stored so as to execute the alarm at an appropriate timing. The exchange time information held by the LED illumination lamp itself is transmitted firstly to the illumination instrument by simple information transmission means. The information is recognized by using a control path existing between the illumination instrument and the controller at hand.

Claims

1. An illumination device comprising:

an illumination instrument whose light source is an LED illumination lamp; and

a controller that is separate from the illumination instrument, the controller including a receiving unit which has a receiving function to receive information about an exchange time of the LED illumination lamp from the illumination instrument, the controller configured to test automatically the receiving function of the receiving unit on a routine basis to ensure that the receiving unit reliably will receive the information to exchange the LED illumination lamp, wherein the controller receives the information about the exchange time of the LED illumination lamp from the illumination instrument during an OFF period of the LED illumination lamp after a long period of time has passed since a most recent exchange of the LED illumination lamp, and

wherein the controller further includes a control unit which remotely controls turn-on/off of the LED illumination lamp, and wherein the controller tests automatically the receiving function of the receiving unit in association with the turn-off control of the LED illumination lamp by the control unit.

2. An illumination device according to claim 1, wherein the illumination instrument includes a storage unit which stores the information about exchange time of the LED illumination lamp.

3. An illumination device according to claim 2, wherein the LED illumination lamp is detachable from the illumination instrument, and the storage unit stores the information about exchange time when the LED illumination lamp is attached.

4. An illumination device according to claim 1, wherein the LED illumination lamp is detachable from the illumination instrument, and the illumination instrument includes an acquiring unit which acquires the information about exchange time stored in the LED illumination lamp from the LED illumination lamp.

5. An illumination device according to claim 1, wherein a control route from the controller to the illumination instrument is shared as a transmission route of the information about exchange time of the LED illumination lamp from the illumination instrument to the controller.

6. An illumination device according to claim 5, wherein the control route and the transmission route are a power line.

7. An illumination device according to claim 5, wherein the control route is a switch control signal transmission route for controlling on and off of the LED illumination lamp, and the switch control signal transmission route is shared as the transmission route for the information about exchange time of the LED illumination lamp.

8. An illumination device according to claim 1, wherein the LED illumination lamp is detachable from the illumination instrument, and the illumination instrument includes a storage unit which stores the information about exchange time of the LED illumination lamp, a control unit which controls the storage unit to store the information about exchange time when the LED illumination lamp is attached, and a transmitting unit which transmits externally the information about exchange time of the LED illumination lamp stored in the storage unit.

9. An illumination device according to claim 1, wherein the LED illumination lamp is detachable from the illumination instrument, and the illumination instrument includes an acquiring unit which acquires the information about exchange time stored in the LED illumination lamp from the LED illumination lamp, and a transmitting unit which transmits externally the information about exchange time of the LED illumination lamp acquired by the acquiring unit.

10. An illumination device according to claim 1, wherein the controller includes a display unit which performs a display based on the information about exchange time of the LED illumination lamp that is received.

11. An illumination device according to claim 10, wherein the display unit performs a display based on the information about exchange time of the LED illumination lamp in association with remote control of turn-on of the LED illumination lamp.

12. An illumination device according to claim 1, wherein the controller turns the LED illumination lamp into the OFF state before the controller starts to receive the information about exchange time of the LED illumination lamp.

13. An illumination device according to claim 1, wherein the controller waits to turn the LED illumination lamp into an ON state until the controller receives the information about exchange time of the LED illumination lamp.

14. An illumination device according to claim 1, wherein the controller includes a control unit which remotely controls turn-on of the LED illumination lamp, and automatically receives the information about exchange time of the LED illumination lamp from the illumination instrument in association with turn-on control of the LED illumination lamp by the control unit.

15. An illumination device according to claim 1, wherein the controller includes a display unit which displays a result of the automatic test of the receiving function of the receiving unit.

16. An illumination device comprising:

an illumination instrument whose light source is an LED illumination lamp; and

a controller that is separate from the illumination instrument, the controller including a receiving unit configured to receive information about an exchange time of the LED illumination lamp from the illumination instrument during an OFF period of the LED illumination lamp to avoid influence by the LED illumination lamp during an ON period thereof,

wherein the controller further includes a control unit which turns the LED illumination lamp into the OFF state immediately before the receiving unit starts to receive the information about exchange time of the LED illumination lamp.

17. An illumination device comprising:

an illumination instrument whose light source is an LED illumination lamp; and

a controller that is separate from the illumination instrument, the controller including a receiving unit configured to receive information about an exchange time of the LED illumination lamp from the illumination instrument during an OFF period of the LED illumination lamp to avoid influence by the LED illumination lamp during an ON period thereof,

wherein the controller further includes a control unit that causes the LED illumination lamp, which otherwise is going to turn ON, to wait to switch to the ON state until the receiving unit completes reception of the information about exchange time of the LED illumination lamp.