Tiltable Mirror Projector System for Wide-Angle Projection
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Solution Overview
Problem
Conventional projector systems cannot project images extensively in directions without using a large-sized mirror, as they do not allow for the mirror's inclination, resulting in areas where the image is not reflected.
Innovation Solution
A projector system comprising a projector, a tiltable mirror on two axes, an angle detector, and a calculator that calculates the reflection-possible range of the mirror, allowing the image to be projected extensively without needing a large mirror by determining the projection-possible range and ensuring the image is within this range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mirror's inclination angle is expanded to project images extensively in directions, then the projection coverage is improved, but a large-sized mirror is required
Solution Approach 1:
The system performs preliminary calculation of the reflection-possible range based on mirror inclination angles before actual projection. The calculator computes which regions can be covered by the mirror at each inclination angle, allowing the projector to pre-determine the optimal projection range and avoid attempting to project into areas that cannot be reflected, thereby eliminating the need for an oversized mirror
Solution Approach 2:
The system dynamically changes the projection parameters (projection range, resolution allocation) based on the calculated reflection-possible range. When the mirror is at a given inclination angle, the projector adjusts its projection to match exactly the computable reflection area, optimizing the use of the fixed-size mirror across different angles without requiring the mirror to be large enough to cover all possible angles simultaneously
2Manufacturing precision
If distortion correction is applied to the projection image, then image quality is improved, but the system cannot utilize the full reflection-possible range of the mirror
Solution Approach 1:
The system performs preliminary calculation of the reflection-possible range before projection, identifying exactly which regions can be covered by the mirror at the current inclination angle. This pre-computation allows the projector to apply distortion correction only to the computable reflection areas while still utilizing the full extent of the mirror's capability, rather than applying uniform correction that would waste the mirror's potential coverage
Solution Approach 2:
The system applies different processing to different regions of the projection. Distortion correction is applied selectively to areas within the calculated reflection-possible range, while the projection parameters are adjusted locally to match the mirror's actual reflective capabilities at each angle, allowing both high image quality and full utilization of the mirror range
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 the projection of images in multiple directions with no need for a large-sized mirror, optimizing the projection range while preventing image distortion and reducing power consumption and eye strain from unwanted reflections.
Implementation Method 1
a mirror (20) which tilts each of on intersecting two axes as an axis of rotation and reflects the image projected from the projector (11)
Data Source
AI summary
The projector system of the present disclosure has a projector, a mirror, an angle detector, and a calculator. The projector projects an image. The mirror tilts each of on intersecting two axes as an axis of rotation and reflects the image projected from the projector. The angle detector detects an inclination angle of the mirror. Based on the inclination angle, the calculator calculates a reflection-possible range of the mirror, a projection-possible range of the projector that corresponds to the reflection-possible range, and an image range so that the image is arranged within the projection-possible range.