Projector Daisy Chain Interface Stability Control

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Solution Overview

Problem

Existing display device systems in daisy chain configurations require complex operations to coordinate multiple projectors, making it difficult to simplify the process of setting up and maintaining their cooperation.

Innovation Solution

A method for controlling display devices that includes determining if the daisy chain function is enabled and setting a supporting interface as the input interface for image signals, ensuring that even when no image signal is inputted, the interface remains unchanged, and detecting other interfaces for potential signal input without reconfiguring the primary input.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the input interface is automatically changed to another interface when no image signal is detected at the supporting interface, then the display device can potentially receive signals from alternative sources, but the daisy chain coupling stability is compromised and unintended reconfiguration occurs

Engineering Contradiction:

Improveinterface signal receptionVSAvoiddaisy chain coupling stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The control unit applies preliminary anti-action by detecting the daisy chain coupling state in advance and preventing automatic input interface switching when such coupling is detected. This preemptive measure blocks the harmful automatic switching behavior before it can occur, ensuring that the supporting interface maintains its designated role even when no signal is currently present, thus preserving daisy chain stability.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system implements self-service by having the control unit automatically detect the coupling state and manage interface selection without user intervention. The display device itself monitors its own coupling status and makes intelligent decisions about interface behavior, eliminating the need for manual configuration while preventing unintended reconfiguration through built-in intelligence.

Inventive Principle:

Principle #25Self-service

2Reliability

If manual configuration is required for each display device in a daisy chain, then precise control over interface settings is achieved, but the operation complexity increases significantly

Engineering Contradiction:

Improveinterface setting accuracyVSAvoidsetup operation simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The control unit automatically detects whether the display device is coupled in a daisy chain and autonomously determines the appropriate input interface based on this detection. This self-service mechanism eliminates the need for manual configuration by each user, as the system performs the configuration task itself, thereby simplifying operations while maintaining reliable interface settings.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control unit performs preliminary detection of the coupling state before the user needs to use the device. By pre-determining the appropriate input interface based on the detected daisy chain configuration, the system prepares the optimal settings in advance, eliminating the need for subsequent manual configuration steps and ensuring reliable operation from the start.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the input interface is frequently switched to detect signal sources, then the display device can adapt to different input sources, but the operational stability and user experience deteriorate

Engineering Contradiction:

Improveinput source adaptabilityVSAvoidoperational stability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS11172175B2Method for controlling display device, and display device

Publication Date: 2021.11.09 SEIKO EPSON CORP

AI summary

A projector includes: a determination unit determining whether a daisy chain function executed by the projector when daisy-chained to another device is set as enabled or not; and a setting unit setting a display source to which an image signal to be a source of an image displayed by the projector is inputted, to one of the plurality of interfaces. The setting unit sets a supporting interface supporting the daisy-chaining as the display source when it is determined by the determination unit that the daisy chain function is set as enabled. The setting unit does not change the display source to an interface other than the supporting interface even when the image signal is not inputted to the supporting interface.