| US 7,564,194 B2 | ||
| Method for detecting lamp current and lamp driving circuit using the method for detecting the lamp current | ||
| Hyeon-Yong Jang, Osan-si (Korea, Republic of); Seong-Sik Choi, Seoul (Korea, Republic of); Du-Hwan Chung, Suwon-si (Korea, Republic of); Moon-Shik Kang, Seongnam-si (Korea, Republic of); and Song-Yi Han, Yongin-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., (Korea, Republic of) | ||
| Filed on Jul. 13, 2007, as Appl. No. 11/777,450. | ||
| Claims priority of application No. 10-2006-0066405 (KR), filed on Jul. 14, 2006. | ||
| Prior Publication US 2008/0024073 A1, Jan. 31, 2008 | ||
| Int. Cl. G05F 1/00 (2006.01) | ||
| U.S. Cl. 315—291 [315/224; 315/282; 315/307; 315/209 R; 345/102; 363/78] | 15 Claims |
| 1. A method for detecting a lamp current, the method comprising:
electrically connecting a first end portion of a first coil to a first supply voltage;
electrically connecting a second end portion of the first coil to a second supply voltage, the first coil being electromagnetically
coupled to a second coil driving a lamp;
electrically connecting the first and second end portions of the first coil at a contact point;
connecting the contact point to ground; and
detecting an electric current flowing from the contact point to ground.
|