Variable-Optics Projection Control Within the Image Circle

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Solution Overview

Problem

Existing projection apparatuses with variable optical characteristics face issues of reduced projection quality due to blocking by the apparatus body or vignetting, which existing technologies fail to adequately address.

Innovation Solution

A projection apparatus with a control device that regulates the movement of the projection region based on the optical characteristics of the system, using shift mechanisms and optical characteristics information to prevent blocking and maintain image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the projection region is allowed to move freely with variable optical characteristics, then the adaptability of the projection apparatus is improved, but the projection quality deteriorates due to blocking by the apparatus body or vignetting

Engineering Contradiction:

Improveadaptability of projection apparatusVSAvoidprojection quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements dynamic regulation of the projection region movement based on real-time optical characteristics. The control device adjusts the movable range of the projection region according to the current optical state, allowing the system to adapt dynamically while maintaining image quality within the regulated range.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of movable range based on optical characteristics. By regulating the projection region's movement range according to optical parameters, the system maintains projection quality while preserving adaptability to different optical states.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the projection region moves beyond the image circle, then the ease of operation is improved, but the projection quality deteriorates due to light deviation from image circle

Engineering Contradiction:

Improveease of operationVSAvoidprojection quality

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent uses feedback control where the control device receives information about the projection region's position and optical characteristics, then regulates movement to keep the projection region within the appropriate range, preventing quality degradation while allowing operational flexibility.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent performs preliminary regulation of the projection region movement based on optical characteristics before quality degradation occurs. By pre-establishing the movable range limits, the system prevents vignetting and image circle deviation while maintaining ease of operation within safe boundaries.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12461332B2Projection apparatus, projection method, and control program

Publication Date: 2025.11.04 FUJIFILM CORP

AI summary

A projection apparatus projects an image by an optical system having at least one optical characteristic being variable, and the projection apparatus includes a processor configured to perform a control of regulating a movement of a projection region to which the image is projected, based on the at least one optical characteristic in the optical system.