US 7,321,337 B2
Electronic device having metal package unit having built-in antenna unit
Ienobu Ikeda, Tokyo (Japan); Takashi Ihara, Tokyo (Japan); Minoru Kobayashi, Tokyo (Japan); and Yasuo Maekawa, Tokyo (Japan)
Assigned to Citizen Holdings Co., Ltd., Tokyo (Japan)
Appl. No. 10/536,763
PCT Filed May 17, 2004, PCT No. PCT/JP2004/006999
§ 371(c)(1), (2), (4) Date May 26, 2005,
PCT Pub. No. WO2004/102738, PCT Pub. Date Nov. 25, 2004.
Claims priority of application No. 2003-136757 (JP), filed on May 15, 2003; and application No. 2003-140456 (JP), filed on May 19, 2003.
Prior Publication US 2006/0109188 A1, May 25, 2006
Int. Cl. H01Q 1/12 (2006.01); H01Q 7/08 (2006.01)
U.S. Cl. 343—718  [343/702; 343/788; 343/985; 343/866] 67 Claims
OG exemplary drawing
 
1. An electronic watch comprising at least an antenna, an information processing apparatus for the purpose of processing information captured by said antenna, a watch movement including therein said information processing apparatus, a watch dial and a metal exterior parts capable of housing therewithin said antenna, and said watch movement, said metal exterior parts having an outer case and a caseback;
wherein said metal exterior parts is configured so that said antenna can receive magnetic flux from outside said metal exterior parts, and can resonate,
said antenna being in the vicinity of said information processing apparatus and surrounded by said outer case and said caseback,
wherein said antenna is disposed inside a space surrounded by said outer case, said caseback and said watch dial together with said watch movement, so that said antenna overlaps with said watch dial in a planar manner, said watch dial is made of a non-metallic material, and said metal exterior parts are set so that the thickness of a body member of said metal exterior parts is 300 μm to 5000 μm.