Projection Apparatus Reflecting Component for Auto-Focusing
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Solution Overview
Problem
Existing projection apparatuses with auto-focusing functions are limited by the requirement that the camera and projection lens must face the same direction and be positioned at a specific angle, which restricts the exterior design and can be affected by insufficient viewing angle or aberration when dealing with large projection screens.
Innovation Solution
Incorporating a reflecting component with a reflecting surface that reflects the projection image to the image capturing device, allowing for adjustable angles and positions, and using a convex surface for wide-angle reflection to prevent aberration issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the camera directly photographs the projection screen, then the photographing is straightforward, but the configuration position and angle of the camera are limited and the exterior design is restricted
Solution Approach 1:
A reflecting component is introduced as an intermediary between the projection lens and the camera. The reflecting component has a reflecting surface that reflects the projection image to the camera, allowing the camera to capture the projection image without directly facing the projection screen. This intermediary structure enables flexible configuration of the camera at different positions and angles while maintaining the photographing function.
2Device complexity
If the camera directly photographs the projection screen, then the structure is simple, but the viewing angle is insufficient and aberration occurs when the projection screen is large
Solution Approach 1:
The reflecting surface of the reflecting component is designed as a convex surface (spherical or aspherical). This curved surface provides wide-angle reflection, allowing the camera to capture a larger field of view of the projection image without direct line-of-sight requirements. The convex surface geometry enables the camera to photograph large projection screens without suffering from insufficient viewing angle or optical aberration.
3Ease of manufacture
If the camera and projection lens face the same direction, then the alignment is simple, but the exterior design is limited
Solution Approach 1:
The reflecting component changes the optical path from a one-dimensional straight line to a two-dimensional reflected path. The camera can be positioned at various angles relative to the projection lens by utilizing the reflecting surface, which redirects light at different angles. This dimensional change in the optical path enables diverse exterior designs while maintaining proper alignment between the projection lens and camera through the reflecting component.
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 flexible configuration of the image capturing device and ensures smooth capture of large projection images by adjusting the reflecting component's angle, preventing adverse effects from limited viewing angles or aberrations.
Implementation Method 1
The reflecting component is disposed on the projection device and has a reflecting surface. The image capturing end faces the reflecting surface. The reflecting surface is adapted to reflect the projection image to the image capturing end.
Data Source
AI summary
A projection apparatus including a projection device, a reflecting component, and an image capturing device is provided. The projection device is adapted to project an image light beam to form a projection image. The reflecting component is disposed on the projection device and has a reflecting surface. The image capturing device is disposed on the projection device and has an image capturing end. The image capturing end faces the reflecting surface. The reflecting surface is adapted to reflect the projection image to the image capturing end.