US 7,454,228 B2 Nov. 18, 2008
(56) References Cited
U.S. PATENT DOCUMENTS
5,243,382 A * 9/1993 Takano et al 399/8
5,455,657 A * 10/1995 Takeda 399/37
FOREIGN PATENT DOCUMENTS
CN 339890 9/1998
Telecommunication, vol. 17, No. 6, Kabushiki Kaisha Ric Telecom, May 25, 2000, pp. 76-79.
Primary Examiner—Dwayne D. Bost
Assistant Examiner—Pierre-Louis Desk
(74) Attorney, Agent, or Firm—David G. Conlin; Steven M.
Jensen; Edwards Angell Palmer & Dodge LLP
The display system of the present invention includes: a body unit for transmitting display data that has been generated; and a display device for displaying an image in accordance with the display data that has been transmitted from the body unit. The display system is characterized in that the body unit and the display device perform communications via radio communication means, and the body unit and the display device are separately provided. Thus, the radio transmission is used as communication means, and there is no cable connecting the display device and the body unit that transfers the display data, so that the user can operate the system freely while watching the display device.
21 Claims, 8 Drawing Sheets