AR Projector Movable Camera Alignment
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Solution Overview
Problem
Conventional projector devices for augmented reality struggle to accurately receive inputs when the projection distance varies or when the surface of the projected object is uneven, leading to misalignment between the sensed and projected regions.
Innovation Solution
A projector device with a movable camera that measures the distance to the projected region and adjusts its position to align the sensed region with the projected region, ensuring accurate input detection by calculating the relative position and pivoting angle to contain the sensed region within the projected region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light source is configured to form the sensed region at a fixed projection distance, then the device structure is simple, but the input reception accuracy deteriorates when projection distance changes or surface is uneven
Solution Approach 1:
The camera is configured to be movable relative to the projector, allowing dynamic adjustment of the sensed region position. The controller moves the camera based on detected distance changes or surface unevenness to maintain alignment between the sensed region and projected region, thereby preserving input reception accuracy across varying projection conditions.
Solution Approach 2:
The system uses a sensor to detect the actual distance to the projected region or surface unevenness, feeds this information back to the controller, which then adjusts the camera position accordingly. This closed-loop feedback mechanism ensures continuous alignment between sensed and projected regions, maintaining accurate input reception despite changes in projection distance or surface conditions.
2Measurement precision
If the camera is made movable to align sensed region with projected region, then the input reception accuracy is improved, but the device complexity increases
Solution Approach 1:
The camera is configured to be movable relative to the projector, allowing dynamic adjustment of the sensed region position. The controller moves the camera based on detected distance changes or surface unevenness to maintain alignment between the sensed region and projected region, thereby preserving input reception accuracy across varying projection conditions.
Solution Approach 2:
The system uses a sensor to detect the actual distance to the projected region or surface unevenness, feeds this information back to the controller, which then adjusts the camera position accordingly. This closed-loop feedback mechanism ensures continuous alignment between sensed and projected regions, maintaining accurate input reception despite changes in projection distance or surface conditions.
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
This solution allows for stable and reliable detection of inputs to the projected region, ensuring that all augmented reality information is accurately sensed and presented, even with changes in projection distance or surface unevenness.
Implementation Method 1
a camera disposed on the body to be movable relative to the projector, wherein the camera is configured to measure a distance therefrom to the projected region
Implementation Method 2
a light source configured to irradiate predefined light toward the object
Data Source
AI summary
Disclosed are a projector device providing augmented reality and a method for controlling the projector device. The projector device includes a body; a projector disposed in the body and configured to project augmented reality information onto a projected region on a predefined object; a camera disposed on the body to be movable relative to the projector, wherein the camera is configured to measure a distance therefrom to the projected region and to sense an input to a sensed region of a predefined size at the measured distance; and a controller configured to control the projector and the camera, wherein the controller is configured to align the sensed region with the projected region, based on a relative position of the sensed region to the projected region, such that the camera receives the input accurately.