[54] COMPUTER SYSTEM HAVING A DETACHABLE DISPLAY
[75] Inventors: Shoichi Ishizawa; Kyoichi Ideno, both of Suwa, Japan
[73] Assignee: Seiko Epson Corporation, Tokyo, Japan
[21] Appl. No.: 860,738
[22] Filed: Mar. 25,1992
[30] Foreign Application Priority Data
Apr. 23, 1991 [JP] Japan 3-092227
[51] Int. CI.* G06F 3/147
[52] U.S. CI 395/164; 345/203;
361/681
[58] Field of Search 395/162, 164; 364/708,
364/708.1; 345/185, 203; 361/681
[56] 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 [45] 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 &
Lubitz
[57] ABSTRACT
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
