Double-Image Projection Device for 3D Ear Canal Teaching
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Solution Overview
Problem
Conventional image projection devices are inadequate for effectively displaying 3-dimensional ear canal structures, making it difficult to observe and learn ear symptoms, which hampers teaching efficiency and effectiveness.
Innovation Solution
A double-image projection device comprising a laser projector with an MEMS scanner, a semi-reflection mirror, and a 3-dimensional ear canal model, where the laser projector projects scanning light beams onto an imaging plane and the ear canal model, allowing viewers to observe 3-dimensional details through a viewing port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a planar image projection device is used, then the device structure is simple, but the ability to display 3-dimensional ear canal structures is poor
Solution Approach 1:
The patent transitions from planar (2D) image projection to three-dimensional (3D) image projection by utilizing the reflective surface of the ear canal model. The laser projector projects images onto the curved surface of the ear canal model, enabling viewers to observe 3D structures through the viewing port, thus resolving the contradiction between simple device structure and effective 3D display capability.
Solution Approach 2:
The ear canal model serves as an intermediary object between the laser projector and the viewer. The model's reflective surface acts as a mediator that transforms the projected 2D images into 3D visual representations, allowing the system to achieve 3D display functionality without requiring a completely complex projection system.
2Ease of operation
If a planar image is projected, then the projection method is simple, but the observation of actual ear symptoms is difficult
Solution Approach 1:
The patent applies dimensionality change by projecting images onto the 3D surface of the ear canal model rather than a flat screen. This allows viewers to observe ear symptoms in their actual three-dimensional context, improving observation accuracy while maintaining operational simplicity through the use of standard laser projection technology.
Solution Approach 2:
The patent utilizes the local quality of the ear canal model's surface, which is specifically shaped to match the anatomy of the ear canal. By projecting images onto this specially designed surface, the system achieves enhanced observation of ear symptoms while keeping the projection method itself relatively simple.
3Productivity
If 3-dimensional ear canal structures are displayed, then the teaching effectiveness is improved, but the device complexity increases
Solution Approach 1:
The ear canal model acts as an intermediary that enables 3D display functionality without requiring a completely new projection system. The model's reflective surface works with standard laser projectors to create 3D images, thus improving teaching effectiveness while limiting the increase in device complexity to mainly the model component rather than the entire projection 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
Enhances teaching and learning efficiency by allowing clear observation and learning of 3-dimensional ear symptoms, improving the effectiveness of educational displays.
Implementation Method 1
The semi-reflection mirror is disposed in a head model, and is located in front of the laser projector, such that the scanning light beams emitted by the laser projector is projected onto an imaging plane as a large image by transmitting through the semi-reflection mirror
Implementation Method 2
The ear canal model is disposed in a head model, and is located in a reflective light path of the semi-reflection mirror, such that the scanning light beams emitted by the laser projector is projected onto the ear drum piece of the ear canal model as a small image through reflecting by the semi-reflection mirror
Data Source
AI summary
A double-image projection device includes a laser projector, a semi-reflection mirror, and an ear canal model. The semi-reflection mirror is located in front of the laser projector; while the laser projector includes a MEMS (micro-electromechanical system) scanner for projecting scanning light beams, such that the scanning light beams is projected onto an imaging plane as a large image through transmitting through the semi-reflection mirror. The ear canal model is located in a reflective light path of the semi-reflection mirror, with its front end provided with a viewing port, and with its rear end provided with an ear drum piece, such that the scanning light beams emitted by the laser projector is projected onto the ear drum piece of the ear canal model a small image, through reflecting by the semi-reflection mirror.