Built-in electronic apparatus and device-detaching method therefor

• US 5,648,762 A
• Filed: 02/01/1995
• Issued: 07/15/1997
• Est. Priority Date: 02/04/1994
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ishizaki, Masao, Ichimura, Akira
• Primary Examiner(s): ZIMMERMAN, BRIAN A
• Application Number:
  US08/382,196
• Time in Patent Office: 895 Days
• Field of Search: 340/825.31, 340/825.34, 73/58, 380/4, 380/23
• US Class Current: 726/34
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: G06F 1/3237 by disabling clock generation or distribution
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: G06F 21/82 Protecting input, output or interconnection devices
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A built-in electronic apparatus used where a notebook personal computer is inserted into a docking station main body. If detachment of the notebook PC from the main body is instructed while the notebook PC is attached to the main body, in response to the detachment instruction, password-input is instructed. If the input password coincides with a prestored password, the application program currently executed is terminated, and the docking station main body is separated from the notebook PC at the software stage. Thereafter, key-lock that physically connects the notebook PC and the main body is released. Thus, the notebook PC becomes detachable from the docking station main body.

Claims

1. A built-in electronic apparatus which has a first electronic device and a second electronic device different from said first electronic device, said first electronic device being attachable to and detachable from said second electronic device, said apparatus comprising:

instruction means for instructing detachment of said first electronic device from said second electronic device;

password-input instruction means for instructing input of a password, in response to a detachment instruction issued by said instruction means;

judgment means for judging whether or not the password, inputted in response to an instruction by said password-input instruction means, is appropriate;

lock means for physically locking the connection between said first and second electronic devices;

lock releasing means for releasing a lock status where said first and second electronic devices are physically locked by said lock means, if said judgment means judges that the password is appropriate.

2. The built-in electronic apparatus according to claim 1, further comprising password storage means for storing information on the password inputted in response to the instruction by said password-input instruction means, into a storage unit of said second electronic device, if said judgment means judges that the password is not appropriate.

3. The built-in electronic apparatus according to claim 1, further comprising:

termination means for quitting an application program currently running, if said judgment means judges that the password is appropriate; and

hardware separation means for separating hardware resource of said second electronic device from said first electronic device at the software stage, before said lock releasing means releases the lock status.

4. The built-in electronic apparatus according to claim 1, wherein said instruction means displays an icon indicative of said first electronic device on a display unit of said second electronic device, and said instruction means instructs the detachment of said first electronic device in accordance with designation of the icon and detachment instruction using the icon designated.

5. The built-in electronic apparatus according to claim 1, wherein said instruction means includes detection means for detecting application of pulling force to said first electronic device.

6. The built-in electronic apparatus according to claim 1, wherein said instruction means has a mechanical switch for instructing the detachment of said first electronic device.

7. The built-in electronic apparatus according to claim 1, wherein said password-input instruction means further comprises discrimination means for instructing the input of a password in voice and discriminating an input voice password.

8. The built-in electronic apparatus according to claim 1, further comprising alarm generation means for generating an alarm, if said judgment means judges that the input password is not appropriate.

9. The built-in electronic apparatus according to claim 1, wherein said lock releasing means includes time measurement means for measuring a predetermined time period, and when time measurement by said time measurement means is completed, said lock releasing means releases the lock status where said first and second electronic devices are connected by said lock means.

10. The built-in electronic apparatus according to claim 1, wherein said lock releasing means includes bus monitor means for monitoring operation of a bus, and if said bus monitoring means detects that the operation of the bus has stopped, said lock releasing means releases the lock status where said first and second electronic devices are connected by said lock means.

11. A device detachment method for a built-in electronic apparatus which has a first electronic device and a second electronic device different from the first electronic device, the first electronic device being attachable to and detachable from the second electronic device, said method comprising:

an instruction step of instructing detachment of the first electronic device from the second electronic device, in a lock status where the first and second electronic devices are physically locked by a locking member;

a judgment step of instructing input of a password, in response to a detachment instruction issued in said instruction step, and judging whether or not the password, inputted in response to the detachment instruction in said password-input instruction step, is appropriate; and

a releasing step of releasing the lock status, if it is judged in said judgment step that the password is appropriate.

12. The device detachment method according to claim 11, further comprising a password storage step of storing information on the password inputted in response to the detachment instruction in said password-input instruction step, into a storage unit of the second electronic device, it is judged in said judgment step that the password is not appropriate.

13. The device detachment method according to claim 11, further comprising the steps of:

terminating an application program currently running, if it is judged that the password is appropriate in said judgment step; and

separating hardware resource of said second electronic device from the first electronic device at the software stage, before the lock status is released in said releasing step.

14. The device detachment method according to claim 11, wherein, in the instruction step, the detachment of said first electronic device is instructed by detection of application of pulling force to the first electronic device in a device detaching direction.

15. The device detachment method according to claim 11, wherein, in the instruction step, the detachment of said first electronic device is instructed by designation of an icon displayed on a display unit of the second electronic device and detachment instruction using the icon designated.

16. The device detachment method according to claim 11, wherein, in said releasing step, after an application currently running is terminated and hardware resource of the second electronic device is separated from the first electronic device at the software stage, then the lock status is released.

17. The device detachment method according to claim 11, wherein, in said releasing step, after an application currently running is terminated and hardware resource of the second electronic device is separated from the first electronic device at the software stage, further, after a predetermined period, the lock status is released.

18. The device detachment method according to claim 11, wherein, in said releasing step, after an application currently running is terminated and hardware resource of the second electronic device is separated from the first electronic device at the software stage, if operation of a CPU bus is stopped, the lock status is released.