Projector Synchronization Signal Intensity Adjustment
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Solution Overview
Problem
Projectors that project images with large screen sizes face issues with unwanted power consumption in pointing elements due to high-intensity synchronization signals being received even when the pointing element is not within the projection area, leading to unnecessary light emission.
Innovation Solution
The image projection system adjusts the intensity of the synchronization signal based on the screen size, reducing the signal intensity when the screen size is smaller to prevent unnecessary power consumption by the pointing element, and incorporates a second synchronization signal with decreasing intensity over time to further optimize light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intensity of the synchronization signal is increased to ensure reception over the entire projection area, then the pointing element can receive the signal across large screens, but the pointing element emits light even when not pointing in the projection image, causing unwanted power consumption
Solution Approach 1:
The patent applies dynamics by making the synchronization signal intensity adjustable rather than fixed. The projection device dynamically adapts the signal intensity based on the detected projection area size, using higher intensity for large screens and lower intensity for small screens, thereby optimizing both reception reliability and power consumption across different usage scenarios
Solution Approach 2:
The patent changes the parameter of synchronization signal intensity based on the projection area size. By detecting the projection area and adjusting the signal intensity parameter accordingly, the system ensures reliable signal reception while preventing unnecessary power consumption when the projection area is small
2Area of stationary object
If the synchronization signal is transmitted with high intensity, then the pointing element receives the signal even at positions far from the projection image, but this causes the pointing element to emit light synchronously even when not pointing in the projection image
Solution Approach 1:
The patent changes the signal intensity parameter according to the projection area size, reducing the coverage area of the synchronization signal when the projection area is small, thereby preventing unnecessary light emission and energy loss while maintaining adequate coverage when the projection area is large
3Use of energy by moving object
If the synchronization signal intensity is reduced for small screen sizes, then power consumption is saved, but the signal may not be received reliably over the entire projection area
Solution Approach 1:
The patent uses dynamic adaptation by detecting the projection area size and adjusting the synchronization signal intensity in real-time, ensuring that the signal intensity is always appropriate for the current projection area, thereby maintaining reception reliability while optimizing power consumption
Solution Approach 2:
The patent implements feedback by detecting the projection area size and using this information to adjust the synchronization signal intensity, creating a closed-loop control system that maintains optimal signal reception reliability while minimizing power consumption
Data Source
AI summary
An image projection system includes a projector and a pointing element. The projector includes: an image projection unit which projects an image; an image pickup unit; a detection unit which detects a pointed position of the pointing element, based on an image picked up by the image pickup unit; a synchronization signal transmission unit which transmits a synchronization signal to the pointing element; a screen size acquisition unit which acquires a screen size of the image projected from the image projection unit; and a synchronization signal adjustment unit which sets a light emission intensity of the synchronization signal to a first intensity if the acquired screen size is a first size and which sets the light emission intensity of the synchronization signal to a second intensity that is lower than the first intensity if the acquired screen size is a second size that is smaller than the first size.