Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Reexamination Certificate
2007-09-25
2007-09-25
Owens, Douglas W. (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
C315S169100, C345S082000
Reexamination Certificate
active
11080970
ABSTRACT:
The anode sides of respective EL elements E1-E4constituting icons are connected to a first potential V1, the cathode sides of the EL elements E1-E4are connected to current absorption sides of constant current sources I1-I4, and current output sides of the constant current sources are connected to a second potential V2whose potential is lower than that of the first potential via light emission control switches S11-S14. Current regulating resistors R101-R104are connected in parallel corresponding to the respective EL elements E1-E4, and therefore by appropriately selecting the resistance values of the current regulating resistors R101-R104, light emission intensities of the respective EL elements E1-E4constituting icons can be regulated appropriately. During an all extinction period during which the respective EL elements E1-E4are all extinguished, an analog switch S201is turned off, and an analog switch S202is turned on. Thus, the anode sides of all EL elements E1-E4become ground potential, and a reverse bias voltage is applied to all EL elements E1-E4. By periodic applying of this reverse bias voltage, the light emission lifetimes of the EL elements E1-E4can be prolonged.
REFERENCES:
patent: 6028573 (2000-02-01), Orita et al.
patent: 6756738 (2004-06-01), Maede et al.
patent: 6985124 (2006-01-01), Nogawa
patent: 7079092 (2006-07-01), Tanghe et al.
patent: 7088321 (2006-08-01), Parker
patent: 2001/0024085 (2001-09-01), Abe et al.
patent: 2003/0006747 (2003-01-01), Jaussi et al.
patent: 2003/0151374 (2003-08-01), Maede et al.
patent: 2003/0160744 (2003-08-01), Yoshida et al.
patent: 2003/0184237 (2003-10-01), Togashi et al.
patent: 2004/0155844 (2004-08-01), Stopa
patent: 2005/0030257 (2005-02-01), Greuel et al.
patent: 2005/0168162 (2005-08-01), Inoue
patent: 2002-43053 (2002-02-01), None
Togashi Masato
Wakou Shingo
Yazawa Naoki
Le Tung X
Owens Douglas W.
Tohoku Pioneer Corporation
Westerman, Hattori, Daniels & Adrian , LLP.
LandOfFree
Drive device and drive method of light emitting elements does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive device and drive method of light emitting elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive device and drive method of light emitting elements will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3744024