HVAC Controller Analog Display with Color-Changing LED Illumination
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Solution Overview
Problem
Existing HVAC controllers lack intuitive visual feedback for temperature set points and current temperatures, making it difficult for users to monitor and adjust climate conditions effectively.
Innovation Solution
The proposed HVAC controller features an analog display with markers and a pointer connected to an electrical motor, along with light-emitting diodes (LEDs) that project a circular 'halo' onto the display. The LEDs change color based on the controller's mode (heating, cooling, or standby), providing visual cues for the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an analog display with markers and pointer is used to show temperature information, then the visual indication of current temperature and set points is improved, but the device complexity increases due to additional components like electrical motors and LEDs
Solution Approach 1:
The patent replaces traditional digital display mechanisms with an analog display system using a rotating pointer and illuminated markers. The electrical motor mechanically rotates the pointer to indicate current temperature, while LEDs provide illumination and color-coded mode indication. This mechanical-optical system substitutes complex digital circuits and screens, achieving intuitive visual feedback with relatively simple components.
Solution Approach 2:
The patent uses color-changing LEDs to indicate different operational modes (heating, cooling, standby) and temperature relationships. The LEDs emit different colors based on the current mode and whether the current temperature is below or above the set point, providing immediate visual information without requiring complex display elements. This color-coding system efficiently communicates system state using a simple optical property.
2Loss of information
If LEDs are added to provide visual feedback for operational modes and temperature status, then user interaction and monitoring capability are improved, but the energy consumption increases
Solution Approach 1:
The LEDs are controlled to provide visual feedback only when needed for user interaction and monitoring. The system uses periodic or on-demand illumination rather than continuous operation, with LEDs activating based on user presence, interaction state, or specific operational conditions. This periodic activation pattern reduces overall energy consumption while maintaining effective visual communication when required.
Solution Approach 2:
The patent uses multi-functional color-changing LEDs that convey multiple pieces of information (operational mode, temperature status) through different colors. A single LED or small array can indicate heating mode with one color, cooling mode with another, and temperature deviations with additional color variations. This multi-information encoding reduces the total number of LEDs needed, thereby reducing overall energy consumption compared to using separate LEDs for each information type.
3Illumination intensity
If a projection ring is used to reflect LED light onto the analog display, then the visual clarity and user interface quality are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent introduces a projection ring as an intermediary optical element between the LEDs and the analog display. This ring-shaped component reflects and directs LED light onto the display surface, creating enhanced illumination and visual clarity. The projection ring acts as a simple optical mediator that improves light distribution without requiring complex optical systems, precision alignment mechanisms, or expensive materials. It can be manufactured as a simple molded plastic or metal ring with reflective surfaces, making it easy to integrate into existing HVAC controller housings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances user interaction by clearly indicating current temperatures, set points, and operational modes through a combination of mechanical and LED-based visual feedback, improving user experience and control over HVAC systems.
Implementation Method 1
a set of light-emitting diodes (LEDs) configured to project a circular 'halo' onto the analog display of the HVAC controller
Implementation Method 2
controlling a set of light-emitting diodes (LEDs) to emit one or more optical beams to reflect off of a projection ring onto the analog display
Data Source
AI summary
In some examples, a device includes an analog display configured to indicate a current temperature and one or more temperature set Additionally, the device includes processing circuitry is configured to control a set of light-emitting diodes (LEDs) to emit one or more optical beams to reflect off of a projection ring onto the analog display. The one or more optical beams are a first color if the current temperature is lower than a set point temperature of the one or more set point temperatures. The one or more optical beams are a second color if the current temperature is greater than the set point temperature of the one or more set point temperatures.