Mobile Projector Distance Detection and Auto-Scaling

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Solution Overview

Problem

Conventional mobile projectors require complex operations to adjust image size and projection distance, limiting user convenience in displaying images effectively.

Innovation Solution

A mobile electronic device equipped with a housing, image projecting unit, distance detecting unit, and processing unit that adjusts the image projection ratio and angle based on detected distance and movement, allowing for intuitive enlargement or reduction of image size and projection angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If the distance between the projector and the screen is increased to display a larger image, then the image size is enlarged, but the device complexity and operation complexity increase

Engineering Contradiction:

Improveimage sizeVSAvoidoperation complexity

Core Design Contradiction:

Area of moving objectVSDevice complexity

Solution Approach 1:

The projector automatically detects the distance to the projection plane using a distance detection unit and autonomously adjusts the projection image ratio and angle based on the detected distance, eliminating the need for manual operation to change image size

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses distance detection feedback to continuously monitor the position between the projector and projection plane, and automatically adjusts projection parameters based on this feedback to maintain optimal image display

Inventive Principle:

Principle #23Feedback

2Area of moving object

If manual operation is used to adjust image size by operating image data, then the image size can be changed, but the ease of operation deteriorates

Engineering Contradiction:

Improveimage sizeVSAvoidoperation simplicity

Core Design Contradiction:

Area of moving objectVSEase of operation

Solution Approach 1:

The projector automatically adjusts the projection image ratio based on the detected distance to the projection plane, eliminating the need for users to manually operate image data or adjust settings

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical adjustment operations with automatic distance detection and processing unit control, substituting user interaction with automated sensor-based adjustment

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables easy and intuitive operation for changing image size and projection angle, enhancing user experience by simplifying the process of displaying images regardless of distance from the projection plane.

Implementation Method 1

a distance detecting unit for detecting a distance from the image projecting unit to a projection plane where the image projected by the image projecting unit is displayed

Methodology Applied

Scientific EffectTime of flight: Time of Flight

Data Source

PatentUS9319502B2Mobile electronic device, image projecting method and projection system

Publication Date: 2016.04.19 KYOCERA CORP

AI summary

According to an aspect, a mobile electronic device includes an image projecting unit, a distance detecting unit, and a processing unit. The image projecting unit projects an image to a projection plane. The distance detecting unit detects a distance from the image projecting unit to the projection plane. The processing unit causes the image projecting unit to project a projection image including at least part of a reference image in such a manner that a ratio of the projection image to a whole of the reference image is changed based on the change in the distance detected by the distance detecting unit.