US Patent No. 9,107,277

ELECTRONIC DEVICE AND CONTROL METHOD THEREFOR


Patent No. 9,107,277
Issue Date August 11, 2015
Title Electronic Device And Control Method Therefor
Inventorship Hiroki Tanaka, Tokyo (JP)
Yukinori Shioya, Tokyo (JP)
Michio Kobayashi, Tokyo (JP)
Kenji Kanzaka, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 9,107,277

1. An electronic device, comprising
a discharge lamp;
a lamp power supply section that supplies power to said discharge lamp; and
a control section that makes said lamp power supply section execute a lamp refresh process of supplying power necessary for
generation of a halogen cycle to said discharge lamp at predetermined time intervals during a low power operation in which
said discharge lamp is lighted with power less than a rated power,

wherein said control section includes:
a recording section in which a control instruction is recorded, the control instruction being issued to said lamp power supply
section during the low power operation; and

a timer that is configured to measure a total low power operation time of said discharge lamp and a total lamp refresh execution
time.