Washer Drum Lighting for Real-Time Laundry Load Indication
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Solution Overview
Problem
Users often inaccurately estimate laundry load size in washing machines, leading to suboptimal treatment performance due to manual input or unreliable automatic load size determination by the machine.
Innovation Solution
A method involving a laundry treating appliance with a rotatable drum that illuminates the treating chamber with adjustable light color and intensity based on the load size, using sensors to determine the load size and communicate optimal cycle selection to the user through a user interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual input of load size is used, then user control is maintained, but load size accuracy deteriorates due to user estimation errors
Solution Approach 1:
The patent implements a feedback mechanism where the washing machine automatically determines load size using sensors (weight, volume, or both) and provides this information to the user through the display. The user can then verify or adjust the automatically determined load size, combining automatic measurement precision with user control. The system feedbacks the determined load size to the user interface for confirmation or modification.
2Measurement precision
If automatic load size determination is used, then measuring accuracy is improved, but user trust deteriorates when users observe discrepancies between indicated and actual load size
Solution Approach 1:
The patent uses the display as an intermediary to communicate load size information to the user in multiple formats (visual icons, text descriptions, or both). The display acts as a mediator that translates sensor data into user-understandable representations, allowing users to verify that the automatic determination matches their observation. This intermediary communication channel builds user trust by making the measurement process transparent.
Solution Approach 2:
The patent employs color-coded visual indicators on the display to represent different load size categories (e.g., small, medium, large). Color changes provide intuitive, immediate feedback to users about the determined load size, making it easier for users to understand and trust the automatic determination. The visual color representation complements textual information and enhances user confidence in the measurement accuracy.
3Loss of information
If light color and intensity are adjusted based on load size, then information communication is improved, but device complexity increases
Solution Approach 1:
The patent uses a single light source (LED or other illumination device) that can change both color and intensity to communicate multiple types of information about load size. This multi-functional light system replaces what would otherwise require separate visual indicators for different load parameters. The light serves multiple communication functions (indicating load category, filling status, and potentially other cycle information) through variations in color and brightness, reducing the number of separate components needed.
Data Source
AI summary
Methods and apparatus for operating a laundry treating appliance to indicate an amount of laundry in a treating chamber are disclosed. An example method includes as laundry is being placed in the treating chamber, illuminating the treating chamber with light, and as the laundry is being placed in the treating chamber, repeatedly adjusting at least one or a color and/or an intensity of the light based on an amount of laundry in the treating chamber.