摘要：

(75) Inventor: Ewald Frasl, Biedermannsdorf (AT) (56) References Cited U.S. PATENT DOCUMENTS (73) Assignee: Koninklijke Philips Electronics N.V., Eindhoven (NL) 1,742,265 A 1/1930 La Rue ...................... 181/173 3,563,337 A 2/1971 Kawamura .................. 181/173 c: 4.321,434 A 3/1982 Irie ............................ 381/423 (*) Notice: Subject to any distic the SME t 4,512,435 A 4/1985 Takeuchi et al. ............ 181/164 patent is extended or adjusted under 6,038,327 A 3/2000 Bleim et al. ................ 381/344 U.S.C. 154(b) by 0 days. 6,611,604 B1 * 8/2003 Irby et al. ................... 381/398

展开