Projector Control Section Switching Operation Modes
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Solution Overview
Problem
Existing display apparatuses experience delays in notifying position information to external devices, particularly in notification modes, where the time taken to transmit position information is undesirable.
Innovation Solution
A display apparatus with a control section that switches between operation modes to either directly transmit position information or convert it into image position information, using separate paths and a switch circuit to optimize transmission, thereby reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position information is transmitted to external apparatus in notification mode, then external apparatus can be notified of operation position, but transmission delay occurs
Solution Approach 1:
The patent divides the notification process into two separate modes: drawing mode for real-time local display and notification mode for external apparatus communication. This segmentation allows each mode to be optimized independently, with notification mode dedicated solely to external transmission without the processing overhead of drawing operations, thereby reducing transmission delay while maintaining notification accuracy
Solution Approach 2:
The patent dynamically switches between drawing mode and notification mode based on operational requirements. The control section can transition between modes to optimize performance for the current task, enabling fast position information transmission to external apparatus when notification mode is active, while suppressing unnecessary drawing operations that would cause delays
2Measurement precision
If position information is converted to image position information for display, then operation position can be precisely represented in image coordinates, but transmission time increases
Solution Approach 1:
The patent separates position information processing into two distinct pathways: one for drawing mode where position information is converted to image coordinates for display, and another for notification mode where position information is transmitted directly to external apparatus without conversion. This segmentation eliminates unnecessary coordinate conversion when only notification is required, reducing transmission time while maintaining position precision when conversion is actually needed
Solution Approach 2:
The patent applies partial action by performing coordinate conversion only when necessary for display purposes, rather than converting all position information unconditionally. In notification mode, the system transmits raw position information directly without the excessive action of conversion, thereby reducing processing time while still providing precise position data to external apparatus
Data Source
AI summary
A projector including an imaging section that detects operation performed on a screen, a coordinate calculating section that calculates position information representing the position in a display area where the operation detected by the imaging section has been performed, and a control section that produces a drawn object based on the position information calculated by the coordinate calculating section and causes both the produced drawn object and a partial image to be displayed in the display area, and the control section switches the operation mode of the display apparatus between a first operation mode in which the position information is transmitted to another projector via a USB I/F section and a second operation mode in which the position information is converted into image position information representing the position in an image displayed on the screen and causes the display apparatus to operate in the selected mode.