HVAC Thermostat Menu Navigation with Segmented Return Paths
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Solution Overview
Problem
HVAC controllers lack intuitive user interfaces and efficient navigation methods, leading to user frustration and increased complexity in controlling building environmental conditions.
Innovation Solution
The development of HVAC controllers with a user-friendly interface that includes a HOME screen providing system information and a hierarchical menu structure, allowing users to easily access and edit settings, with features like a MENU icon for changing settings and a DONE icon for reverting to the HOME screen after completing changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a hierarchical menu structure with multiple levels is implemented, then the settings can be organized systematically, but the navigation complexity increases and users must navigate back through multiple levels to return to the HOME screen
Solution Approach 1:
The menu structure is segmented into different types (first group requiring back navigation, second group returning directly to HOME). This segmentation allows the system to organize settings systematically while providing different navigation paths based on the type of setting being accessed, thus resolving the contradiction between structured organization and navigation ease.
Solution Approach 2:
A DONE icon acts as an intermediary element that mediates between the leaf menu and the HOME screen. When activated, it provides a direct return path to the HOME screen without requiring users to navigate back through multiple hierarchical levels, thus simplifying navigation while maintaining the structured menu organization.
2Reliability
If a timeout period is implemented to automatically return to the HOME screen, then the system can recover from idle states, but the user experience is degraded by forced waiting periods
Solution Approach 1:
The system provides self-service through the DONE icon, which allows users to manually control the return to HOME screen based on their needs. This eliminates the forced timeout waiting period while still maintaining system reliability, as the DONE icon is always available to trigger the return to HOME screen when needed.
3Device complexity
If traditional menu navigation is used where users must navigate back through hierarchical levels, then the menu structure remains simple, but the time required to return to the HOME screen increases
Solution Approach 1:
The DONE icon serves as an intermediary that provides a direct path from leaf menus back to the HOME screen. This intermediary mechanism eliminates the time-consuming back-navigation through hierarchical levels while maintaining the simplicity of the overall menu structure, thus resolving the contradiction between structural simplicity and time efficiency.
4Adaptability or versatility
If a MENU icon is added to access settings, then the interface becomes more functional, but the interface complexity increases
Solution Approach 1:
The MENU icon provides universal access to all settings and configuration options from the HOME screen. This single icon serves as a multi-functional gateway that maintains interface simplicity while providing comprehensive access to system settings, thus resolving the contradiction between functionality and complexity.
Data Source
AI summary
An HVAC controller includes a housing, a user interface and a controller that is operably coupled to the user interface and is configured to display a HOME screen on the user interface that provides the user with current system operating information and enabling the user to access a hierarchical menu structure for viewing and/or editing one or more settings of the HVAC controller. The hierarchical menu structure includes a plurality of menu branches each having two or more hierarchical menu levels with a leaf menu at the bottom of each branch, where for a first group of the leaf menus, the user must navigate “back” to return to the HOME screen while for a second group of the leaf menus, the user is returned to the HOME screen after the user indicates the user is done with the leaf menu, without having to wait for the timeout period.