Adjustable Reflection Section for Ceiling Projection
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Solution Overview
Problem
Existing projectors designed to project images on ceilings require complex and bulky support systems to hold the projector body at an arbitrary angle, leading to increased size and complexity.
Innovation Solution
A projector with a reflection section and an adjustment mechanism that allows the inclination angle of the reflection surface to be adjusted, eliminating the need for a complex support system and enabling projection on ceilings while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector body is held at an arbitrary angle by a support system to project images on the ceiling, then the projector can achieve ceiling projection capability, but the support configuration becomes complicated and the projector size increases
Solution Approach 1:
The patent introduces a reflection section as an intermediary component between the projection optical apparatus and the ceiling. Instead of tilting the entire projector body, the light flux is reflected by a reflection surface (mirror) that can be independently adjusted. This mediator allows ceiling projection without requiring complex support structures to hold the heavy projector body at angles.
Solution Approach 2:
The patent separates the function of ceiling projection from the main projector body by using an independent reflection section. The reflection section can be adjusted independently from the projector body, allowing the main body to remain in a standard horizontal position while only the reflection surface needs angular adjustment. This segmentation eliminates the need for complex support systems.
2Adaptability or versatility
If the projector body is held at an arbitrary angle by a support system to project images on the ceiling, then the projector can achieve ceiling projection capability, but the projector size increases
Solution Approach 1:
The reflection section serves as a compact intermediary that redirects light without requiring the entire projector body to be repositioned or supported at angles. This approach maintains a compact projector size while achieving ceiling projection capability.
3Adaptability or versatility
If the inclination angle of the reflection section is adjusted to project images at different angles, then the projection range is increased, but image distortion occurs
Solution Approach 1:
The patent incorporates an inclination angle detector that measures the actual angle of the reflection section, and a distortion corrector that uses this feedback information to compensate for image distortion. The system automatically adjusts the projected image based on the detected inclination angle, ensuring undistorted images regardless of the projection angle.
Solution Approach 2:
The distortion correction is performed in advance on the image signal before it reaches the projection optical apparatus. By pre-correcting the image signal based on the inclination angle, the system ensures that the final projected image is undistorted without requiring mechanical adjustment of the projection geometry.
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
The solution allows for a reduced projector size and increased projection range, with the ability to adjust the inclination angle to prevent image distortion, ensuring a clear and undistorted image on the ceiling.
Implementation Method 1
a reflection section (91) having a reflection surface (911) disposed along the direction in which the projection optical apparatus (33) outputs image light, the reflection surface reflecting the image light
Data Source
AI summary
A projector includes a light source, a light modulator that modulates the light flux emitted from the light source in accordance with an image signal to form image light, a projection optical apparatus that enlarges and projects the image light, a reflection section having a reflection surface disposed along the direction in which the projection optical apparatus outputs the image light, the reflection surface reflecting the image light, and an adjustment section that adjusts the inclination angle of the reflection section with respect to the direction in which the image light travels.