Method, apparatus and navigation apparatus for sharing display by plural operating systems

• US 7,069,519 B1
• Filed: 09/25/2000
• Issued: 06/27/2006
• Est. Priority Date: 09/24/1999
• Status: Expired due to Fees

• Current Assignee: Clarion Co., Ltd. (Faurecia SA)
• Original Assignee: Hitachi, Ltd., Xanavi Informatics Corporation (Hitachi, Ltd.)
• Inventors: Endo, Yoshinori, Nakamura, Kozo, Ohno, Hiroshi, Okude, Mariko, Saito, Masahiko, Kamiwaki, Tadashi, Atarashi, Yoshitaka
• Primary Examiner(s): Kincaid, Kristine
• Assistant Examiner(s): VU, THANH T
• Application Number:
  US09/668,169
• Time in Patent Office: 2,101 Days
• Field of Search: 345/700, 345778-779, 345/781, 345794-797, 345/802, 710/260, 715/778, 715/779, 715/783, 715/790, 715/802, 715/794, 715/795, 715/796, 715/797
• US Class Current: 715/778
• CPC Class Codes: G06F 9/45533 Hypervisors; Virtual machine monitors
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2360/06 Use of more than one graphics processor to process data before displaying to one or more screens
• CPC Class Codes: G09G 2360/125 using unified memory architecture [UMA]
• CPC Class Codes: G09G 5/024 using colour registers, e.g. to control background, foreground, surface filling G09G5/06 takes precedence
• CPC Class Codes: G09G 5/14 Display of multiple viewports
• CPC Class Codes: G09G 5/393 Arrangements for updating the contents of the bit-mapped memory

Abstract

In a display apparatus where a plurality of operating systems are operated on a single processor, the plurality of operating systems share one and the same display in different display environments one example of which is a color pallet. In order to implement this configuration, the display apparatus includes the following configuration components: The plurality of operating systems, a display switching processing unit for switching the displays of the plurality of operating systems, graphics-drawing frames corresponding to the plurality of operating systems, and a display environment changing processing unit for changing, in correspondence with the display switching performed by the display switching processing unit, the display environments such as the color pallet, a color mode, and a frame address.

Claims

1. A display apparatus where results of processing by a plurality of OSs are displayed on a same display unit, comprising:

a memory which expands said processing results in correspondence with said plurality of OSs,

a display environment changer which changes, in correspondence with said plurality of OSs, display environments to be set for expanding said processing results,

a display superimposer which displays a plurality of frames in a state of being superimposed on each other, said plurality of frames being expanded into said memory, and

an input device which receives a user input, wherein, as to one display area on a display unit at which said plurality of frames are superimposed, said input device determines further display areas, within said one display area utilized by said plurality of OSs, with reference to a position on said display unit at which said user input is performed and a superimposing mode of said plurality of frames, and transfers an input event of said user input to one of said OSs which displays at said position, wherein said input device determines, in correspondence with a background of said superimposed display, said OS to which said input event is to be transferred.

2. The display apparatus as claimed in claim 1, wherein said display environment changer sets color pallets that are different from each other in correspondence with said plurality of OSs, and expands display data into said memory in accordance with said set color pallets.

3. The display apparatus as claimed in claim 1, wherein said display environment changer sets color modes that are different from each other in correspondence with said plurality of OSs, and expands display data into said memory in accordance with said set color modes.