Projection Device Automatic Object Area Detection

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Solution Overview

Problem

Existing projection devices require users to manually designate and move objects on a document holder to project them in an enlarged manner, which is time-consuming and cumbersome, especially when multiple objects or varying sizes are involved.

Innovation Solution

A projection device with an imaging section that automatically sets a clear area for object placement based on the display surface's state, allowing for easy object image extraction and projection, using a control section to guide the user and eliminate background influence by setting a blank area close to the imaging section.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the user manually designates the area to be projected by moving marks, then the projection device can project the designated material in an enlarged manner, but the operation becomes time-consuming and cumbersome when multiple materials or varying sizes are involved

Engineering Contradiction:

Improveease of designating projection areaVSAvoidtime required for designating and moving marks

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The projection device automatically designates the projection area by detecting the position of the imaging device and autonomously setting the first area on the display surface, eliminating the need for manual mark placement and area designation by the user

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control device pre-sets the first area based on the imaging device position before projection, so that when the user attaches the material, the projection area is already determined, avoiding the need for post-attachment area designation

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the user changes the mounting position of materials or transcribes handwritten information to distinguish the projection object, then the desired material can be identified, but the process requires a lot of time and toil

Engineering Contradiction:

Improveaccuracy of identifying projection objectVSAvoidtime required for repositioning or transcribing

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system automatically identifies the projection object by comparing the imaged display surface with stored reference images, eliminating the need for users to reposition materials or transcribe information for identification purposes

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control device uses feedback from image comparison between the current display surface state and stored reference images to automatically determine which material should be projected, providing automatic object identification without manual intervention

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If a blank area is set as the first area close to the imaging section, then background influence is eliminated and image resolution is maintained, but the area for object attachment is restricted

Engineering Contradiction:

Improveimage extraction accuracyVSAvoidavailable area for object attachment

Core Design Contradiction:

Manufacturing precisionVSArea of stationary object

Solution Approach 1:

The system applies different functions to different areas of the display surface by setting a specific blank area close to the imaging section as the first area for object attachment, ensuring high image extraction accuracy in this localized region while allowing other areas to serve different purposes

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9658519B2Projection device and projection method

Publication Date: 2017.05.23 SEIKO EPSON CORP

AI summary

A projector includes a projection section adapted to project an image on a white board, an imaging section adapted to take an image of the white board, and a control section adapted to set an imaging area representing a range, from which an image of an object attached to the white board is extracted, in accordance with a display state of the white board imaged by the imaging section, and then make an imaging area image indicating the imaging area be projected on the white board.