Projector Brightness Region Detection and Adaptive Image Relocation
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Solution Overview
Problem
Portable projectors face challenges in projecting clear images on surfaces with varying conditions, such as shadows and uneven brightness, making it difficult to maintain image visibility across all regions.
Innovation Solution
A projector device with a control unit that acquires brightness information of the projection surface and adjusts the image projection to focus on regions with lower brightness, moving the projection area if necessary, and altering the image's direction, size, or shape to optimize visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector projects an image on a projection surface with varying brightness conditions (such as surfaces with shadows), then the projector can operate in diverse environments, but the image visibility becomes inconsistent across different regions of the projection surface
Solution Approach 1:
The control unit analyzes brightness information from different regions of the projection surface and selectively projects the image only on regions with lower brightness values. This local quality approach ensures that the image is displayed on darker regions where it is more visible, rather than attempting uniform projection across the entire surface. The system divides the projection surface into multiple regions and makes localized projection decisions based on each region's brightness characteristics.
2Reliability
If the projector projects an image on a region with lower brightness to improve visibility, then the image becomes easier to view, but the projection position becomes less flexible
Solution Approach 1:
The control unit dynamically adjusts the projection position based on real-time brightness information of the projection surface. Instead of using a fixed projection position, the system continuously monitors the brightness characteristics and automatically relocates the image to the most suitable dark region. This dynamic adaptation maintains both visibility quality and operational flexibility, as the projection position is determined automatically based on environmental conditions rather than manual selection.
Solution Approach 2:
The projector performs automatic brightness analysis and self-adjusts the projection position without requiring manual intervention. The control unit independently evaluates the projection surface conditions and autonomously determines the optimal projection region, eliminating the need for user input while maintaining both visibility and flexibility.
3Reliability
If the projector analyzes brightness information of all regions to select the optimal projection area, then the image visibility is optimized, but the processing time and complexity increase
Solution Approach 1:
The control unit divides the projection surface into multiple discrete regions and analyzes the brightness information of each region separately. This segmentation approach simplifies the overall analysis by breaking down the complex task of evaluating the entire surface into manageable regional assessments. The system compares brightness values across segmented regions and selects the most suitable one for projection, reducing computational complexity while maintaining optimization effectiveness.
Data Source
AI summary
According to an aspect, a projector device includes an image projecting unit and a control unit. The image projecting unit projects an image. The control unit acquires brightness information of regions included in a projection surface on which the image projecting unit can project the image, and causes the image projecting unit to project, based on the brightness information of the regions, the image on a low-brightness region, among the regions, whose brightness is lower than that of another region.