公开(公告)号：US06970173B2

公开(公告)日：2005-11-29

申请号：US09954685

申请日：2001-09-14

Applicant: Alec A. Ciolac

Inventor： Alec A. Ciolac

IPC: G09G5/14 ,  G09G5/39 ,  G09G5/395 ,  G06F12/02

CPC classification number: G09G5/14 ,  G09G5/39 ,  G09G5/395 ,  G09G2340/12

Abstract: A system and method is provided for supporting a multiple display configuration through a single connected display device. The present disclosure allows a system desktop to be expanded across multiple virtual displays without a need for extra hardware to support multiple display devices. A display driver partitions a frame buffer of a video card into portions. Each portion is used to support a different virtual display. The display driver reports a number of virtual displays to an operating system and provides pointers to addresses associated with the portions of the frame buffer. The operating system treats each frame buffer portion as a separate frame buffer and stores video data for each virtual display in an associated frame buffer portion. The display driver selects a virtual display from a set of multiple virtual displays and routes video data from the frame buffer portion associated with the selected display for output on a connected display device.

Abstract translation: 提供了一种用于通过单个连接的显示设备支持多显示器配置的系统和方法。 本公开允许在多个虚拟显示器之间扩展系统桌面，而不需要额外的硬件来支持多个显示设备。 显示驱动程序将视频卡的帧缓冲器分成多个部分。 每个部分用于支持不同的虚拟显示。 显示驱动程序向操作系统报告多个虚拟显示，并提供指向与帧缓冲器的部分相关联的地址的指针。 操作系统将每个帧缓冲器部分视为单独的帧缓冲器，并将每个虚拟显示器的视频数据存储在相关联的帧缓冲器部分中。 显示驱动器从一组多个虚拟显示器中选择虚拟显示器，并且从与所选显示器相关联的帧缓冲器部分路由视频数据，以在连接的显示设备上输出。