Variable Direction Light Emission for Oblique Image Projection
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Solution Overview
Problem
Conventional projectors are limited in their ability to project images to surfaces other than those facing the emission plane, failing to meet diverse user needs for image projection.
Innovation Solution
An image projecting apparatus with a light source capable of varying its output and an emitting unit that adjusts the emission direction, allowing for two projection modes: one projecting obliquely upward and another obliquely downward, enabling image projection to various surfaces such as walls, floors, and desks without repositioning the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector is configured to emit light only in a perpendicular direction to the emission plane, then the image projection is simple and reliable, but the adaptability to different projection surfaces is limited
Solution Approach 1:
The patent applies the dynamics principle by making the emission direction of light adjustable rather than fixed. The emitting unit can change the emission direction between perpendicular and oblique angles, allowing the projector to adapt to different projection surfaces (walls, floors, ceilings) without changing the physical position of the device. This dynamic adjustment resolves the contradiction by providing versatility while maintaining a relatively simple device structure.
Solution Approach 2:
The patent applies parameter changes by modifying the emission angle parameter of the light. The control unit adjusts the emission direction parameter to switch between different projection modes (front projection, overhead projection, etc.). This parameter adjustment enables the same device to serve multiple projection purposes, improving adaptability without requiring complex structural modifications.
2Ease of operation
If the projector is fixed at a predetermined location, then the device structure is simple and stable, but the ease of operation and flexibility in usage is reduced
Solution Approach 1:
The patent applies universality by enabling the projector to perform multiple projection functions from a single fixed position. Through the emitting unit's ability to change emission directions, the device can project to various surfaces (front wall, ceiling, floor) without requiring physical relocation. This multi-functionality improves ease of operation and usage flexibility while maintaining a simple fixed-device structure.
Solution Approach 2:
The patent applies dynamics by allowing the emission direction to be dynamically adjusted while the device remains physically fixed. The control unit dynamically changes the emission angle parameter to adapt to different usage scenarios, providing operational flexibility without requiring structural changes or device movement. This resolves the contradiction between ease of operation and device structure complexity.
3Adaptability or versatility
If the emission direction is fixed in a front direction, then the device structure is simple, but the adaptability to different projection surfaces (wall, floor, ceiling) is limited
Solution Approach 1:
The patent applies dynamics by making the emission direction adjustable to cover multiple surfaces. The emitting unit can change its emission direction between front, upward, and downward angles, enabling the projector to serve wall, ceiling, and floor projection needs. This dynamic capability expands projection surface coverage while maintaining relatively simple device structure.
Solution Approach 2:
The patent applies parameter changes by adjusting the emission angle parameter to cover different projection surfaces. The control unit modifies the emission direction parameter to switch between front projection (0°), overhead projection (90° upward), and other angle projections. This parameter-based adjustment achieves broad surface coverage without requiring complex mechanical structures.
Data Source
AI summary
An image projecting apparatus for projecting an image includes a light source, a light emitting port, an emitting unit, and a control unit. The emitting unit causes the light emitted from the light source to be emitted from the light emitting port in such a manner that an emission direction of the light emitted from the light emitting port is variable. The control unit controls the light source and the emitting unit to switch between a first projection mode and a second projection mode. When the image projecting apparatus is placed on a horizontal plane, the emission direction is a front direction of the light emitting port or obliquely upward with respect to the horizontal plane in the first projection mode, and the emission direction is obliquely downward with respect to the horizontal plane in the second projection mode.