公开(公告)号：US10039176B2

公开(公告)日：2018-07-31

申请号：US15502768

申请日：2014-09-30

申请人： NEC Display Solutions, Ltd.

发明人： Koichi Tagishi ,  Hiroki Tanaka ,  Yasuji Kawai

IPC分类号： H05B37/02 ,  H05B41/24 ,  H05B41/16 ,  G03B21/20 ,  H05B41/292

CPC分类号： H05B41/24 ,  G03B21/2053 ,  H05B41/16 ,  H05B41/2925 ,  H05B41/2928

摘要： A discharge lamp lighting device includes: a storage unit that stores information; a lamp drive unit that supplies drive power to the discharge lamp; a voltage detection unit that detects the lamp voltage of the discharge lamp; and a control unit that, on the basis of the voltage detection value supplied from the voltage detection unit, stores in the storage unit error log information that indicates the operating state of the discharge lamp when change of the lamp voltage indicates a predetermined voltage characteristic.