Title:
表示装置及び誘導灯
Document Type and Number:
Japanese Patent JP5789739
Kind Code:
B2
Abstract:
A display device (1) includes light emitting sections (36,37) of different luminous colors disposed between anode and cathode electrodes, current control units (34,35) for controlling currents supplied to the light emitting sections (36,37) to desired current levels, respectively, and an emergency power supply (33) for supplying a current to the current control units (34,35) in an emergency in which a commercial power source (20) does not perform a desired function. When operated by the emergency power supply, the current control units turn on and off the light emitting sections (36,37) of different luminous colors such that they are turned on during different periods of time. When the emergency power supply is used, the display device (1) controls turning on of the planar light emitting element using an organic EL light emitting element depending on luminous colors thereof, thereby suppressing the power consumption of the emergency power supply.
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Inventors:
Shuji Kawachi
Shin Ogawa
Yoshinori Tsuzuki
Nishimura Yufumi
Hitoshi Hirose
Masao Okawa
Shin Ogawa
Yoshinori Tsuzuki
Nishimura Yufumi
Hitoshi Hirose
Masao Okawa
Application Number:
JP2011035171A
Publication Date:
October 07, 2015
Filing Date:
February 21, 2011
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H05B37/02; H05B44/00
Domestic Patent References:
| JP2007157738A | ||||
| JP2009187900A | ||||
| JP2009187845A | ||||
| JP11040351A | ||||
| JP2002132192A |
Attorney, Agent or Firm:
Yasuo Itaya
Katsumi Taguchi
Shinichi Mizuta
Itaya Masayuki
Katsumi Taguchi
Shinichi Mizuta
Itaya Masayuki