DISPLAY APPARATUS AND A CONTROL METHOD THEREFOR

• US 20090128447A1
• Filed: 10/31/2008
• Published: 05/21/2009
• Est. Priority Date: 11/19/2007
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Fukuda, Tetsu, Yoshikawa, Tomoyasu
• Granted Patent: US 8,199,067 B2
• Time in Patent Office: Days
• US Class Current: 345/1.100
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/026 Arrangements or methods related to booting a display
• CPC Class Codes: G09G 2330/027 Arrangements or methods related to powering off a display
• CPC Class Codes: H04N 21/4312 involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 21/47214 for content reservation or setting reminders; for requesting event notification, e.g. of sport results or stock market stock exchange data over packet-switching network H04L12/1804; push services over packet-switching network H04L12/1859; notification of incoming messages in packet switching networks H04L51/224
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers

Abstract

A control unit 201, after sending information that should be displayed on a sub-display to a sub-control unit 301, turns power to itself off and enters a standby state. When returning to a power-on state from standby state, first a sub-control unit is started up and a power-on request is made to a main display unit 201, then, in the interval before completion of start-up of the main control unit 201, information received from the main control unit 201 when it entered standby state is caused to be displayed on the sub-display.

Claims

1. A display apparatus having a first display unit, a second display unit, a first control unit which controls said first display unit, and a second control unit which controls said second display unit, wherein:

said first control unit, in response to an instruction to said display apparatus to enter a standby state from a power-on state, after sending predetermined information that should be displayed on said second display unit to said second control unit, powers itself off, and

said second control unit stores the predetermined information that should be displayed on said second display unit, which it received from said first control unit, in a storage unit, and said second control unit, in response to an instruction to said display apparatus to enter the power-on state from the standby state, outputs a power-on request to said first control unit, and reads out the predetermined information that should be displayed on said second display unit from said storage unit and causes the predetermined information to be displayed on said second display unit.

3. A display apparatus according to claim 1, wherein the predetermined information to be displayed on said second display unit is information regarding the source of the video image being displayed on said first display unit and information regarding volume level when said first control unit receives the power-off request.

2. A display apparatus having a first display unit, a second display unit, a first control unit which controls first display unit, and a second control unit which controls said second display unit, wherein:

said first control unit, in response to an instruction to said display apparatus to enter a standby state from a power-on state, after storing predetermined information that should be displayed on said second display unit to a storage unit, powers itself off;

said second control unit, in response to an instruction to said display apparatus to enter the power-on state from the standby state, sends a power-on request to said first control unit;

in response to the power-on request, said first control unit, before executing start-up processing, reads out the predetermined information that should be displayed on said second display unit from said storage unit, and sends it to said second control unit; and

said second control unit causes the predetermined information that should be displayed on said second display unit, which was received from said first control unit, to be displayed on said second display unit.

4. A display apparatus having a first display unit, a second display unit, a first control unit which controls said first display unit, and a second control unit which controls said second display unit, wherein:

in a standby state in which said first control unit is in a power-off state and said second control unit is in a power-on state, when said second control unit receives a reservation information confirmation request, said second control unit, without starting up said first control unit, reads out reservation information stored in advance in a storage unit, which is accessible from said second control unit in the standby state.

5. A display apparatus according to claim 4, wherein said storage unit, which is accessible from said second control unit in the standby state, is a shared memory accessible from both said first control unit and said second control unit, and the reservation information is written to said shared memory by said first control unit.

6. A control method of a display apparatus having a first display unit, a second display unit, a first control unit which controls said first display unit, a second control unit which controls said second display unit, the method comprising:

a step in which said first control unit, in response to an instruction to said display apparatus to enter a standby state from a power-on state, sending predetermined information that should be displayed on said second display unit to a second control unit, and then powering itself off, and

a step in which said second control unit saving the predetermined information that should be displayed on said second display unit, which was received from said first control unit, to a storage unit, and

a step in which in response to an instruction to enter the power-on state from the standby state, said second control unit sending a power-on request to said first control unit, reading out the predetermined information that should be displayed on said second display unit, and causing the predetermined information to be displayed on said second display unit.

7. A control method of a display apparatus having a first display unit, a second display unit, a first control unit which controls said first display unit, a second control unit which controls said second display unit, the method comprising:

a step in which said first control unit, in response to an instruction to said display apparatus to enter a standby state from a power-on state, saving predetermined information that should be displayed on said second display unit in a storage unit, then powering itself off, and

a step in which said second control unit, in response to an instruction to said display apparatus to enter the power-on state from the standby state, sending a power-on request to said first control unit, and

a step in which said first control unit, in response to the power-on request, before start-up processing, reading out the predetermined information that should be displayed on said second display unit from said storage unit and sending the predetermined information to said second control unit, and

a step in which said second control unit receiving from said first control unit the predetermined information that should be displayed on said second display unit and causing the predetermined information to be displayed on said second display unit.

8. A control method of a display apparatus having a first display unit, a second display unit, a first control unit which controls said first display unit, a second control unit which controls said second display unit, the method comprising:

a step in which in a standby state in which said first control unit is in power-off state and said second control unit is in power-on state, when said second control unit receives a reservation information confirmation request, said second control unit, without starting up said first control unit, reading out reservation information stored in advance in a storage unit accessible by said second control unit in the standby state, and

a step in which said second control unit causing the reservation information to be displayed on said second display unit.