Cross-Screen Indicator Tracking in Multi-Projector Display Systems

The patent merges the event detection and processing functions across multiple display devices by introducing a management device that receives event information from both the first and second display devices. This centralized approach allows the system to treat the movement of the indicator between screens as a continuous operation rather than separate pen-up/pen-down events, thereby maintaining operation recognition accuracy while enabling seamless cross-screen interaction.

The patent introduces a management device as an intermediary between the display devices and the event processing system. This intermediary receives event information from multiple display devices, analyzes the context of indicator movement, and determines whether the operation should be recognized. The management device mediates between the simple pen-up/pen-down detection at display boundaries and the complex requirement for accurate operation recognition, resolving the contradiction by adding intelligence at the coordination layer rather than complicating individual display devices.

The patent implements preliminary action by having the management device receive and store event information from multiple display devices before performing the replacement processing. The system preliminarily collects pen-up and pen-down event information, then analyzes whether these events are related to the same indicator movement operation. This preliminary data collection and contextual analysis enable the system to efficiently process events while maintaining continuous input recognition, as the management device can quickly determine whether events should be treated as a continuous operation based on pre-collected information.