Light-transmitting plate
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Solution Overview
Problem
Cooking devices with glass or glass-ceramic plates colored using vanadium oxide struggle to effectively mask internal elements while allowing visible red light from radiant heating elements and blue light from light-emitting diodes, leading to visibility issues and power inefficiencies due to low light transmission.
Innovation Solution
A cooking device with a glass or glass-ceramic plate having a light transmission ranging from 2.3% to 40% and an optical transmission of at least 0.6% within the 420-480 nm wavelength range, combined with a masking means such as a light radiation scattering or absorbing coating, heterogeneities, or texturings to mask internal elements except for light-emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the light transmission of the plate is reduced to improve masking of internal elements, then the visibility of blue light-emitting diodes deteriorates
Solution Approach 1:
The patent applies different optical properties to different regions of the plate. The plate has a first region with lower light transmission (1.5-10%) for masking internal elements and a second region with higher light transmission (10-40%) for displaying information, including visibility of blue light-emitting diodes. This local differentiation resolves the contradiction by allowing both masking and visibility requirements to be satisfied in different areas.
Solution Approach 2:
The plate is segmented into multiple functional regions with distinct optical transmission characteristics. The first region (masking region) and second region (display region) are spatially separated, allowing the device to simultaneously achieve effective masking of internal elements while maintaining visibility of important indicators like blue light-emitting diodes in the display region.
2Illumination intensity
If the light transmission at 450 nm is increased to improve blue light visibility, then the masking effectiveness of internal elements deteriorates
Solution Approach 1:
Different wavelength transmission characteristics are applied to different regions. The first region maintains low transmission across the visible spectrum (including 450 nm) for masking, while the second region allows higher transmission of blue light (450 nm) for display purposes, resolving the spectral transmission contradiction.
Solution Approach 2:
The plate is divided into regions with different spectral transmission properties. The masking region blocks blue light effectively, while the display region transmits blue light, allowing both functions to coexist without interference.
3Illumination intensity
If the light transmission is increased to improve visibility of light-emitting diodes, then the aesthetic appeal and masking of internal elements deteriorates
Solution Approach 1:
The plate exhibits different aesthetic qualities in different regions. The first region maintains dark, aesthetically pleasing appearance with low light transmission for masking, while the second region has higher transmission to display information and light-emitting diodes, resolving the contradiction between aesthetics and visibility.
Solution Approach 2:
The aesthetic and functional display areas are segmented into distinct regions. The masking region preserves the sleek, modern aesthetic with minimal light transmission, while the display region provides necessary information visibility, allowing both aesthetic appeal and functional requirements to be satisfied.
4Object-generated harmful factors
If very low light transmission (around 0.1-2.5%) is used to mask internal elements, then the power consumption of light-emitting diodes must be increased
Solution Approach 1:
The plate provides different light transmission levels in different regions, allowing light-emitting diodes in the display region to operate at lower power levels while still achieving adequate visibility. The first region maintains low transmission for masking, while the second region allows sufficient light transmission to reduce the power requirements of display elements.
Solution Approach 2:
By segmenting the plate into masking and display regions with appropriate transmission characteristics, the system avoids the need for high power consumption that would be required if the entire plate had uniformly low transmission. The display region's higher transmission reduces the energy burden on light-emitting diodes.
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
Enhances the visibility of blue light-emitting diodes without increasing power consumption, improves visibility in various lighting conditions, and maintains aesthetic appeal by effectively masking internal device components.
Implementation Method 1
plates made of glass or glass-ceramic that is colored using vanadium oxide, usually made of the latter material, which conceal the internal elements by absorbing most of the visible radiation
Implementation Method 2
a masking means intended to mask at least one part of said internal elements is placed on top of, underneath or within said plate
Implementation Method 3
said masking means being capable of masking at least 50% of the surface occupied by the internal elements
Data Source
AI summary
One subject of the invention is a cooking device comprising internal elements including at least one heating means, control and/or monitoring means and at least one light-emitting device, said internal elements being covered with at least one glass or glass-ceramic plate colored using vanadium oxide, at least one light-emitting device not being of red color seen through said plate, said plate intrinsically having a light transmission ranging from 2.3% to 40% and an optical transmission of at least 0.6% for at least one wavelength within the region ranging from 420 to 480 nm, said cooking device being such that at least one masking means intended to mask at least one part of said internal elements is placed on top of, underneath or within said plate.