Display Device Video Input Signal Detection Optimization

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Solution Overview

Problem

Display devices with multiple video input interfaces experience delays in detecting video signals due to the time-consuming process of scanning for input signals.

Innovation Solution

A method where the sequence of scanning video input interfaces is determined based on activity information, prioritizing the most recently active interface to reduce detection time, and the sequence is modified if it leads to faster signal detection during subsequent power-ons or resume operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple video input interfaces are supported, then adaptability is improved, but the time required to detect video signals increases

Engineering Contradiction:

Improvenumber of video input interfacesVSAvoidvideo signal detection time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by storing activity information about video input interfaces before detection is needed. When a video source is connected, the system retrieves pre-stored activity patterns to determine the optimal scanning sequence, avoiding the need to scan all interfaces from scratch each time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The scanning sequence is made dynamic rather than static. The system adjusts the scanning order based on stored activity information, making the detection process adaptive to usage patterns. Frequently used interfaces are scanned first, while less used interfaces are scanned later or skipped.

Inventive Principle:

Principle #15Dynamics

2Reliability

If all video input interfaces are scanned sequentially, then reliability of signal detection is improved, but productivity decreases

Engineering Contradiction:

Improvevideo signal detection reliabilityVSAvoidsignal detection speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Instead of scanning all video input interfaces completely, the system performs partial scanning based on activity information. It scans only the most likely active interfaces first (partial action), and only scans additional interfaces if necessary, thus achieving sufficient detection reliability without the full time cost of exhaustive scanning.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system uses feedback from stored activity information to guide the scanning process. Activity information about which interfaces were previously active feeds back into determining the current scanning sequence, creating a closed-loop system that continuously optimizes detection efficiency based on past performance.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7433973B2Display device featuring a reduced amount of time for detecting video input signals

Publication Date: 2008.10.07 DELL PROD LP

AI summary

A display device includes a plurality of video input interfaces. The display device also includes a display controller coupled to the plurality of video input interfaces. The display controller determines a sequence in which the plurality of video input interfaces are scanned for a video signal. The display controller makes the determination in response to activity information associated with one or more video input interfaces included in the plurality of video input interfaces.