Title:
Detector circuit
Document Type and Number:
Japanese Patent JP6048725
Kind Code:
B2
Abstract:
A detection circuit according to embodiments includes a first circuit (19, 19a) and a second circuit (20, 20a) . The first circuit (19, 19a) is turned OFF when an AC voltage to be input to a pair of input terminals (5, 6a) is smaller than a prescribed value, and is turned ON when the AC voltage is equal to or higher than the prescribed value. The second circuit (20, 20a) detects whether the AC voltage is an AC voltage leading-edge controlled by a dimmer (3, 3a, 3b), an AC voltage trailing-edge controlled by the dimmer, or an AC voltage having a continuous phase on the basis of at least one of the value and a gradient of the voltage of the first circuit (19, 19a) when the first circuit (19, 19a) is turned ON while the first circuit (19, 19a) is in the OFF state.
Inventors:
Noriyuki Kitamura
Tohru Ishikita
Toshihiko Sasai
Hirokazu Otake
Yuji Takahashi
Hiroshi Akahoshi
Tohru Ishikita
Toshihiko Sasai
Hirokazu Otake
Yuji Takahashi
Hiroshi Akahoshi
Application Number:
JP2012167631A
Publication Date:
December 21, 2016
Filing Date:
July 27, 2012
Export Citation:
Assignee:
Toshiba Lighting & Technology Corporation
International Classes:
H05B37/02; H05B44/00
Domestic Patent References:
| JP2011198671A | ||||
| JP2010140824A |
Attorney, Agent or Firm:
Masahiko Hinataji
Junichi Kozaki
Hiroshi Ichikawa
Soichi Homma
Tatsutetsu Shirai
Junichi Kozaki
Hiroshi Ichikawa
Soichi Homma
Tatsutetsu Shirai