Projector Master-Slave Control for Individual Use
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Solution Overview
Problem
Existing systems with multiple projectors that project identical images do not allow for the individual use of one projector, as they are typically configured to operate interlocking, making it difficult to use a single projector independently.
Innovation Solution
A projector system that includes an accepting unit for user operations and commands from another projector, a storage unit for mode information, and a processing unit that executes predetermined operations independently of commands, allowing for individual use by predetermining a specific operation, such as a wireless operation, to ignore subsequent operations and maintain interlocking mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple projectors are configured to operate interlocking with a master-slave relation, then coordinated projection of identical images is achieved, but individual use of a single projector becomes difficult
Solution Approach 1:
The patent implements dynamic role assignment where projectors can switch between master and slave roles based on operational needs. The system allows a slave projector to temporarily accept operations independently through role switching, enabling individual use while maintaining the interlocking configuration. This dynamic flexibility resolves the contradiction by allowing the system to adapt its control structure rather than being fixed in a master-slave relation.
Solution Approach 2:
The patent makes the slave projector universal by enabling it to perform both slave functions (receiving commands from master) and master functions (accepting operations independently). The slave projector can operate in dual modes: normally following master commands, but occasionally accepting operations directly when needed. This multi-functionality allows the same projector to serve different purposes in different contexts, resolving the limitation of individual use.
2Reliability
If a master-slave relation is set between two projectors, then clear control authority is established, but the slave projector cannot operate without being controlled by the master projector
Solution Approach 1:
The patent introduces dynamic role switching that allows the slave projector to temporarily assume master-like operational independence. When the slave projector needs to operate individually, it can accept operations directly without master control. This dynamic adjustment maintains clear control authority during normal operation while providing independent operation capability when needed, resolving the contradiction between reliability and adaptability.
3Ease of operation
If the slave projector accepts operations independently, then individual use becomes possible, but ambiguity arises about which projector should execute processing
Solution Approach 1:
The patent implements a feedback mechanism where the slave projector notifies the master projector when it accepts an operation independently. This feedback loop maintains control responsibility clarity by informing the master of the slave's independent action, preventing ambiguity about which projector should execute processing. The master can then coordinate its response accordingly, maintaining system-wide control awareness.
Data Source
AI summary
In the case where a projector is used in combination with another projector, individual use of only one projector is enabled. A slave projector operates together with a master projector. In this case, the operation methods to start up the projector are a first method in which only a first key is pressed, a second method in which the first key and a second key are pressed simultaneously, and a third method in which the first key and a third key are pressed simultaneously. When the slave projector detects a user's operation with a remote controller, if the operation is done by the first method or the second method, the slave projector ignores this operation. Meanwhile, if the operation is done by the second method, the slave projector starts up the own device irrespective of the command from the master.