Display Controller Failure Restoration Mechanism

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Solution Overview

Problem

Conventional display system failure restoration methods cause confusion and impaired user operability due to unintended changes in displayed contents during the restart process, as they resume displaying contents from before the failure occurred.

Innovation Solution

A controller with a failure monitoring section that suspends display updates during failures and a restoration monitoring section that restarts updates only when the display control section is fully restored, ensuring continuous display of the state immediately before the failure without interruptions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the display controller restarts and resumes displaying contents from before the failure occurred, then the failure restoration function is achieved, but the display shows unintended contents during restoration causing user confusion and impaired operability

Engineering Contradiction:

Improvefailure restoration capabilityVSAvoiduser operability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system performs preliminary actions by storing display state information (content, position, timing) in a buffer before failure occurs. When failure is detected, this pre-stored information is used to restore the display to its previous state, ensuring continuity without showing intermediate or unintended contents during the restoration process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A display state buffer acts as an intermediary between the display controller and the display apparatus. This buffer stores the state of display contents before failure and provides it during restoration, preventing direct transmission of unintended contents while maintaining the restoration function.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the display controller is restarted automatically upon failure detection, then system availability is improved, but display content inconsistency occurs during the restart period

Engineering Contradiction:

Improvesystem availabilityVSAvoiddisplay content consistency

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The system captures and stores display state information in advance (before failure) in a buffer. When automatic restart occurs, this pre-captured state is restored, ensuring content consistency throughout the restart period and eliminating display instability during the recovery process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By storing display state information continuously in the buffer and using it during restoration, the system maintains continuous display of valid content without interruption or inconsistency, even during automatic restart operations.

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If the monitor transmits failure history information to the display controller after restart, then the restoration function is completed, but unnecessary contents are displayed during the transmission and processing period

Engineering Contradiction:

Improverestoration completionVSAvoiddisplay content accuracy

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The display state buffer serves as an intermediary that holds the correct display content information during the entire restoration process. Even while failure history information is being transmitted and processed, the buffer provides accurate content information to the display controller, preventing display of unnecessary or incorrect contents.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The buffer is prepared in advance with accurate display state information before failure occurs. This pre-prepared information is immediately available during restoration, eliminating the need to display placeholder or incorrect content while waiting for failure history processing to complete.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS7825916B2Controller, mobile terminal apparatus, and program

Publication Date: 2010.11.02 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

Provided is a controller capable of preventing unnecessary contents from being displayed in a period from when a failure occurs on a terminal apparatus to when the failure is restored. When a failure monitoring section detects that a failure has occurred on a display control section, failure detection information is outputted to a display update control section. The display update control section, in response to the outputted failure detection information, suspends updating a display, which is performed by a display section. And when a restoration monitoring section detects that the display control section has been restored from the failure, restoration detection information is outputted to the display update control section. The display update control section controls the display section so as to suspend updating the display in response to the failure detection information and starts updating the display in response to the restoration detection information.