Interactive Display Rotation via Stationery Detection

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Solution Overview

Problem

Existing display devices for interactive whiteboards cannot intuitively rotate figures, leading to increased complexity in operations due to the need for additional edit commands and cumbersome handling of rotations.

Innovation Solution

A display device with a detection unit for stationery tools that determines the rotation angle based on position information from multiple detection points, allowing intuitive rotation of displayed objects and reducing the complexity of identification information processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If edit commands such as erasure, movement, copy, and call are prepared for the pen-like writing instrument, then the display device can execute various operations on characters and figures, but the number of edit commands increases and the operation becomes complicated when rotation functionality is added

Engineering Contradiction:

Improverotation functionalityVSAvoidnumber of edit commands

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses a physical stationery tool (triangle ruler or protractor) as a template to copy its shape and rotation angle onto the display surface. The stationery tool itself becomes the source of both the figure shape and its orientation, eliminating the need for separate rotation commands. The system detects the stationery tool's position and orientation, then reproduces the corresponding figure with the same rotational characteristics.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The stationery tool serves multiple functions simultaneously: it defines the shape of the figure to be drawn, determines the rotation angle of the figure, and acts as a physical interface for intuitive operation. By making the stationery tool multi-functional, the system avoids needing separate controls for shape selection and rotation, thereby reducing operational complexity while maintaining versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If a figure is drawn using the display device, then the figure can be displayed on the writing surface, but the figure cannot be rotated and a figure obtained by rotating the figure must be additionally drawn

Engineering Contradiction:

Improvefigure rotationVSAvoidtime to draw additional rotated figure

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The system performs preliminary detection of the stationery tool's orientation before drawing the figure. By detecting the rotation angle of the stationery tool in advance and incorporating it into the figure drawing process, the system ensures the figure is drawn with the correct orientation from the start, eliminating the need to draw additional rotated figures later.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides feedback by detecting the stationery tool's position and orientation in real-time and automatically adjusting the drawn figure's rotation angle to match. This closed-loop feedback mechanism ensures that the drawn figure accurately reflects the physical stationery tool's orientation, enabling intuitive rotation without manual intervention or additional drawing steps.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If identification information is added to multiple detection points on the stationery tool, then the rotation angle can be determined accurately, but the detection process becomes more complicated

Engineering Contradiction:

Improverotation angle detection accuracyVSAvoiddetection process complexity

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The stationery tool is divided into multiple detection points, each with its own identification information. This segmentation allows the system to detect the orientation of different parts of the stationery tool independently and calculate the overall rotation angle more accurately by comparing the relative positions and orientations of these segmented detection points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses an intermediary calculation process that takes the identification information from multiple detection points and transforms it into rotation angle data. Rather than directly detecting rotation, the system mediates through detecting the positions and identification information of multiple points, then computationally deriving the rotation angle, which simplifies the physical detection process while maintaining precision.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9182832B2Display device, control method of display device and program

Publication Date: 2015.11.10 SEIKO EPSON CORP

AI summary

A display device includes a display unit to display a video screen on a display surface, a information detection unit to detect position information of a plurality of detection points arranged on a stationery tool imitating a shape of a stationery, and identification information added to the plurality of detection points respectively and different among the plurality of detection points, and an angle determination unit to determine a rotation angle of the stationery tool on the display surface based on the position information of the plural detection points.