Display apparatus, control method thereof, and program

• US 8,346,986 B2
• Filed: 10/26/2011
• Issued: 01/01/2013
• Est. Priority Date: 05/29/2008
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kotani, Junji
• Primary Examiner(s): Park, Ilwoo
• Application Number:
  US13/281,543
• Publication Number:
  US 20120144070A1
• Time in Patent Office: 433 Days
• Field of Search: None
• US Class Current: 710/8
• CPC Class Codes: G03B 21/006 using LCD's
• CPC Class Codes: G06F 3/1423 controlling a plurality of local displays, e.g. CRT and flat panel display
• CPC Class Codes: G06F 3/1462 with means for detecting differences between the image stored in the host and the images displayed on the remote displays
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 2370/22 Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

A display apparatus includes a communication unit configured to communicate with an external device, a display unit configured to display an image received from the external device, and a storing unit configured to store information for controlling whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected. In addition, a determination unit determines whether or not to continue the display of the image received from the external device by comparing the type of the external device involving the communication by the communication unit with the information stored in the storing unit, and a control unit controls whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, in accordance with the determination.

Claims

1. A display apparatus comprising:

a communication unit configured to communicate with an external device;

a display unit configured to display an image received from the external device;

a storing unit configured to store information for controlling whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, wherein said information includes at least one of information indicating types of external devices for which display of an image should be continued and information indicating types of external devices for which display of an image should not be continued;

a determination unit configured to determine whether or not to continue the display of the image received from the external device by comparing the type of the external device involving the communication by the communication unit with said information stored in the storing unit; and

a control unit configured to control whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, in accordance with the determination result by the determination unit.

2. The display apparatus according to claim 1, wherein said information stored in the storing unit includes information indicating types of external devices which logically disconnect the communication with the communication unit.

3. The display apparatus according to claim 2, wherein the control unit controls to continue the display of the image being displayed by the display unit when the communication is disconnected, if the type of the external device is one of the types of external devices which logically disconnect the communication with the communication unit.

4. The display apparatus according to claim 1, wherein the control unit controls to end the display of the image being displayed by the display unit when the communication is disconnected, if the type of the external device is in a USB Mass Storage Class.

5. The display apparatus according to claim 1, wherein the control unit controls to continue the display of the image being displayed by the display unit when the communication is disconnected, if the type of the external device is in a USB Imaging Class.

6. A display apparatus comprising:

a communication unit configured to communicate with an external device;

a display unit configured to display an image received from the external device;

a determination unit configured to determine whether or not to continue the display of the image received from the external device by detecting whether the communication is physically disconnected or whether the communication is logically disconnected when the communication with the external device is disconnected; and

a control unit configured to control whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, in accordance with the determination result by the determination unit.

7. The display apparatus according to claim 6, wherein, when the communication with the external device is physically disconnected, the control unit controls to end the display of the image being displayed by the display unit after a predetermined first period elapses.

8. The display apparatus according to claim 7, wherein, when the communication with the external device is logically disconnected, the control unit controls to end the display of the image being displayed by the display unit after a predetermined second period, which is longer than the first period, elapses.

9. The display apparatus according to claim 6, wherein the communication unit is connected to the external device via a physical communication interface.

10. A control method of a display apparatus which comprises:

a communication unit configured to communicate with an external device;

a display unit configured to display an image received from the external device; and

a storing unit configured to store information for controlling whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, wherein said information includes at least one of information indicating types of external devices for which display of an image should be continued and information indicating types of external devices for which display of an image should not be continued,

the method comprising;

a determination step of determining whether or not to continue the display of the image received from the external device by comparing the type of the external device involving the communication by the communication unit with said information stored in the storing unit; and

a control step of controlling whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, in accordance with the determination result in the determination step.

11. A control method of a display apparatus which comprises:

a communication unit configured to communicate with an external device; and

a display unit configured to display an image received from the external device,

the method comprising;

a determination step of determining whether or not to continue the display of the image received from the external device by detecting whether the communication is physically disconnected or whether the communication is logically disconnected when the communication with the external device is disconnected; and

a control step of controlling whether or not to continue the display of the image being displayed by the display unit when the communication is disconnected, in accordance with the determination result in the determination step.