Electrochromic Indicator on Oven Door for Operational Notifications
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Solution Overview
Problem
Oven ranges have limited space for user interfaces due to the size of the oven door and cooktops, restricting the amount and size of information that can be displayed, and existing solutions like electrochromic devices are not effectively utilized to provide notifications on the operational state of cooking appliances.
Innovation Solution
An electrochromic indicator is integrated into the opaque region of the oven door, which changes appearance in response to voltage changes to provide notifications about the operational state of the cooking appliance, such as completion of a cycle or reaching a preheat temperature, ensuring visibility and distinguishability from the surrounding opaque region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the oven door is made large to maximize oven cavity volume, then the oven cavity volume is improved, but the available space for user interface features is reduced
Solution Approach 1:
The notification system is merged with the existing opaque region of the oven door, integrating the indicator into the door structure itself rather than adding separate display components. This combines the door's structural function with the notification function, utilizing otherwise unused space.
Solution Approach 2:
The opaque region of the oven door serves multiple functions: it provides aesthetic appearance, maintains door structural integrity, and now also serves as a notification display surface through the integrated electrochromic indicator, maximizing the utility of existing door space.
2Loss of information
If traditional display features are added to the oven door, then information display capability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The electrochromic material changes its optical properties (from transparent to colored) in response to electrical signals, providing notification information through color transformation rather than requiring complex display elements like LCD screens or LED arrays.
Solution Approach 2:
The optical transmission parameter of the indicator material is changed electrically to convey information, transforming the material's physical state between transparent and colored to indicate operational status without requiring mechanical or electronic display components.
3Illumination intensity
If an indicator is made visible on the opaque region, then notification visibility is improved, but the indicator must be distinguishable from the opaque region
Solution Approach 1:
The electrochromic indicator changes color to contrast with the surrounding opaque region, creating visual distinction through color transformation rather than through shape or structural differences. The material transitions from matching the opaque region's appearance to contrasting with it for visibility.
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
The electrochromic indicator effectively communicates operational states of the cooking appliance without obstructing the view through the oven door window, providing clear and visible notifications that are distinguishable from the opaque region, enhancing user interaction and information display without increasing the door's size.
Implementation Method 1
An electrochromic indicator is provided to the opaque region of the oven door. The electrochromic indicator includes a material with a first appearance that renders the electrochromic indicator substantially indistinguishable from the opaque region in a first operational state and a second appearance in a second operational state that contrasts with the opaque region
Implementation Method 2
In a bleached state, the electrochromic device is transparent to all visible wavelengths. In a colored state, the electrochromic device is most transparent in blue, but very low in transmission in the longer visible wavelengths. The electrochromic device can be switched between the bleached state and the colored state.
Data Source
Figure 1
AI summary
Provided is a cooking appliance that includes an oven cavity and an oven door is pivotally coupled adjacent to an entrance leading into the oven cavity, and a method of controlling such a cooking appliance. The oven door includes a substantially opaque region that interferes with external observation of the oven cavity while the door is in the closed orientation, and an electrochromic indicator provided to the opaque region. The electrochromic indicator includes a material with a first appearance that renders the electrochromic indicator substantially indistinguishable from the opaque region in a first operational state, and a second appearance in a second operational state that contrasts with the opaque region to issue a notification related to operation of the cooking appliance.