Synchronizing Display Ranges for Graph Alignment
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Solution Overview
Problem
Image display terminals currently fail to ensure that graphs fit the background image across different XY coordinate system display ranges, leading to misalignment when displayed on teacher and student terminals.
Innovation Solution
The implementation of an image display terminal with a control unit that sets and synchronizes display range data across multiple terminals, allowing for proper alignment of graphs with background images through coordinated display range settings and data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If graph expression data is transmitted between terminals with different display ranges, then collaboration between terminals is enabled, but the graph does not fit the background image on the receiving terminal
Solution Approach 1:
The patent applies preliminary action by having the transmitting terminal send display range data (Xmin, Xmax, Ymin, Ymax) along with the graph expression data before the receiving terminal displays the graph. This allows the receiving terminal to pre-calculate the appropriate display range for the background image, ensuring the graph will fit correctly when displayed. The display range data is transmitted in advance to enable proper coordination between terminals with different display characteristics.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the display range parameters (Xmin, Xmax, Ymin, Ymax) of the background image on the receiving terminal based on the transmitted graph expression data and the transmitting terminal's display range. The receiving terminal modifies these parameters to match the appropriate coordinate system, allowing the graph to fit the background image correctly despite different terminal display characteristics.
2Ease of operation
If each terminal uses its own independent display range settings, then terminal independence is maintained, but graphs drawn on one terminal do not fit on other terminals
Solution Approach 1:
The patent applies feedback by having terminals exchange display range data (Xmin, Xmax, Ymin, Ymax) information. When a graph is created on one terminal, the display range settings are transmitted to other terminals, which then adjust their background image display ranges accordingly. This feedback mechanism ensures that all terminals maintain appropriate display ranges for their respective graphs while preserving operational independence.
Solution Approach 2:
The patent applies universality by creating a standardized data exchange format that includes graph expression data and display range parameters. This universal interface allows different terminals with independent display characteristics to communicate and coordinate their display ranges, enabling graphs to fit background images across multiple terminals while maintaining each terminal's operational independence.
Data Source
AI summary
An image display terminal includes an image display control unit, a display range setting unit, a display range sending unit and a graph expression receiving unit. The image display control unit displays a background image in a display screen. The display range setting unit sets display range data of a coordinate system to an image display region of the display screen. The display range sending unit sends the display range data to at least one other image display terminal which displays the background image displayed on the image display terminal. After the display range data is set to an image display region of the other image display terminal, the graph expression receiving unit receives, from the other image display terminal, graph expression data for a graph figure displayed on the image display region of the other image display terminal.