Multi-User Display Control for Safety-Critical Screen Transitions
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Solution Overview
Problem
Existing display control systems in multi-function apparatuses with multiple display interfaces fail to ensure safety regulations when multiple users operate different functions simultaneously, particularly in cases where remote UIs are involved, leading to potential unsafe operations.
Innovation Solution
A display control method that ensures safety by controlling display content transitions based on user roles and function types, allowing non-executors to operate functions that do not require safety assurance while preventing transitions that compromise safety, even when different function control units are involved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple users operate different functions simultaneously through different display interfaces, then operational flexibility and versatility are improved, but safety control and regulation compliance deteriorate
Solution Approach 1:
The patent segments the display control system into separate control domains based on function control units. Each function control unit independently manages safety control for its associated functions, allowing multiple users to operate different functions simultaneously without compromising safety control. This segmentation enables versatile operation while maintaining reliable safety control through isolated management of each function domain.
2Ease of operation
If display content transitions are freely allowed between different functions, then ease of operation is improved, but safety assurance for critical functions deteriorates
Solution Approach 1:
The patent introduces function control units as intermediary controllers between user operations and display content. Each function control unit acts as a mediator that processes display transition requests and determines whether to allow transitions based on safety requirements. This intermediary layer enables convenient display switching for non-critical functions while blocking transitions that would compromise safety assurance for critical functions.
3Reliability
If safety control is strictly enforced for all functions, then reliability is improved, but operational efficiency and user convenience deteriorate
Solution Approach 1:
The patent applies local quality by differentiating safety control requirements across different function domains. Each function control unit is assigned appropriate safety control levels based on the specific safety requirements of its associated functions. This allows strict safety control for critical functions while enabling more flexible operation for non-critical functions, thereby maintaining both reliability and operational efficiency.
Data Source
AI summary
A display control method for controlling display contents on a display device capable of displaying a screen related to an apparatus, includes: displaying a screen of a function using a first function control unit in the apparatus on a second display device operated by a second user different from a first user operating a first display device, based on an instruction from the second user; and performing control so that a screen related to the apparatus displayed on the second display device is not transitioned to a screen related to the apparatus displayed on the first display device, in a case where a screen of a function that uses a second function control unit different from the first function control unit in the apparatus and requires ensuring safety is operated on the first display device, based on an instruction from the first user.