Projector Automatic Content Switching via Power Toggling
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Solution Overview
Problem
Existing projectors require manual operation to switch between content projections, which can be inconvenient and time-consuming, especially when resuming playback from a stopped position or switching to a new content after power interruption.
Innovation Solution
A projector with an electricity reception terminal and control section that automatically switches content by toggling the power supply between ON and OFF, allowing seamless playback resumption from the last stop position and automatic switching to a new content without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is required to switch content projections, then content switching can be precisely controlled, but user convenience deteriorates and operation time increases
Solution Approach 1:
The projector automatically switches content based on power supply status changes without requiring manual user input. The control section detects power supply initiation and autonomously switches to the next content in the queue, making the system serve itself rather than requiring continuous user intervention.
Solution Approach 2:
The projector pre-loads and queues multiple contents in advance. When power supply is initiated, the control section automatically retrieves and displays the next content from the pre-prepared queue, eliminating the need for users to manually select content at the moment of power-on.
2Ease of operation
If power supply toggling is used for content switching, then operation simplicity is improved, but unintended switching may occur
Solution Approach 1:
The system dynamically adjusts its response based on the timing and pattern of power supply changes. By introducing a predetermined period threshold, the system distinguishes between intentional content switching (rapid on-off within the threshold) and incidental power fluctuations (slower changes), thereby adapting its switching behavior to the actual user intent.
3Adaptability or versatility
If content switching occurs on every power supply initiation, then content variety is improved, but unnecessary switching increases
Solution Approach 1:
The control section dynamically evaluates the timing interval between power supply termination and re-initiation. Only when the interval falls within a predetermined period (indicating intentional switching) does the system proceed with content switching. This dynamic threshold-based approach filters out unnecessary switching operations while preserving content variety.
Data Source
AI summary
A projector includes an electricity reception terminal to which electric power is supplied via an electricity feed terminal, a projection section that includes a light source, a spatial light modulator, an irradiation system, and a projection system and projects light, and a control section that switches a content to another whenever electric power supply to the electricity reception terminal is initiated and causes the projection section to project light carrying an image related to the content selected in the switching operation.