COMPUTER SYSTEM HAVING A DETACHABLE DISPLAY
 Inventors: Shoichi Ishizawa; Kyoichi Ideno, both of Suwa, Japan
 Assignee: Seiko Epson Corporation, Tokyo, Japan
 Appl. No.: 860,738
 Filed: Mar. 25,1992
 Foreign Application Priority Data
Apr. 23, 1991 [JP] Japan 3-092227
 Int. CI.* G06F 3/147
 U.S. CI 395/164; 345/203;
 Field of Search 395/162, 164; 364/708,
364/708.1; 345/185, 203; 361/681
 References Cited
U.S. PATENT DOCUMENTS
3,592,527 7/1971 Corners et al 350/160
5,138,565 8/1992 Satou 364/708
[ii] Patent Number: 5,347,630  Date of Patent: Sep. 13,1994
FOREIGN PATENT DOCUMENTS
0149762 11/1984 European Pat. Off. .
0371383 11/1989 European Pat. Off. .
0395033 4/1990 European Pat. Off. .
2235797 8/1990 United Kingdom .
Primary Examiner—Robert L. Richardson
Attorney, Agent, or Firm—Spensley Horn Jubas &
An information processing apparatus such as a personal computer or a word processor is disclosed. A main unit includes at least processing means for processing input data, and main unit memory means connected to the processing means. A display device is attachable to and detachable from the main unit case and includes at least display device memory means for storing data of the main unit supplied through a connector to be connected to a main unit connector when attached, display means for displaying the stored content, control means for controlling the display and power supply means for supplying powers to the display device memory means, the display device and the control means when detached.
18 Claims, 6 Drawing Sheets