Glass-Ceramic Cooktop Display With Color Compensation Filter

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Solution Overview

Problem

Modern glass-ceramic cooktops have limited color display options due to their transmission curve, which restricts the range of colors that can be perceived by users, and existing solutions like RGB-LEDs require multiple LEDs and are prone to color shifts over time.

Innovation Solution

A compensation filter in the form of a color layer is introduced between the glass-ceramic cooktop and the lighting means, correcting the color coordinates of the lighting to achieve desired color effects by combining the glass ceramics with this filter.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a transparent glass-ceramic cooktop is used to allow light transmission for displays, then the cooking surface appears transparent or translucent, but the internal structure becomes visible and the aesthetic appearance is compromised

Engineering Contradiction:

Improvelight transmissionVSAvoidinternal structure visibility

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent applies a color layer to the glass-ceramic cooktop that selectively absorbs certain wavelengths of light while transmitting others. This color layer masks the internal structure visibility while still allowing sufficient light transmission for the display to function, thus resolving the contradiction between transparency and aesthetic appearance.

Inventive Principle:

Principle #32Color changes

2Stability of the object's composition

If the glass-ceramic cooktop has a limited transmission curve, then the cooking surface maintains its structural properties, but the range of colors available for user information is greatly limited

Engineering Contradiction:

Improveglass-ceramic transmission curveVSAvoidcolor display range

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent introduces a color layer as an intermediary between the light source and the user's view. This color layer compensates for the limited transmission curve of the glass-ceramic by adding specific wavelengths that would otherwise be blocked, thereby expanding the color display range without altering the glass-ceramic's structural properties.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the optical parameters of the glass-ceramic system by applying a color layer with specific absorption and transmission characteristics. This changes the overall transmission curve of the cooktop assembly, enabling a broader color display range while maintaining the original glass-ceramic material properties.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If RGB-LEDs are used to expand color display capabilities, then more color options are available, but the device complexity increases due to requiring three LEDs and their controls

Engineering Contradiction:

Improvecolor display capabilityVSAvoidnumber of LEDs and controls

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the color generation function from the LED system itself and transfers it to the color layer applied to the glass-ceramic. Instead of using multiple LEDs with different color wavelengths, a single LED combined with a color-filtering layer produces the desired color effects, thereby reducing device complexity while maintaining color display versatility.

Inventive Principle:

Principle #2Taking out (Extraction)

4Manufacturing precision

If a color layer compensation filter is introduced to correct color coordinates, then the desired color effects are achieved, but the device structure becomes more complex

Engineering Contradiction:

Improvecolor coordinate accuracyVSAvoidstructure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges the color compensation function with the existing glass-ceramic cooktop structure by applying the color layer directly to the surface. This integration approach achieves precise color coordinate correction while minimizing additional structural complexity, as the color layer becomes part of the cooktop assembly rather than a separate component.

Inventive Principle:

Principle #5Merging (Combining)

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 allows for a wide range of pre-definable color effects while maintaining a uniform, aesthetically preferred non-transparent cooking surface, enhancing user experience and preventing internal structure visibility without additional aids.

Implementation Method 1

introducing a compensation filter in the form of a color layer—corresponding to the desired perceived color—between the glass-ceramic cooktop and the lighting means

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Implementation Method 2

Based on the coloring of the glass-ceramic cooktop and the very limited selection of colored LED displays, the range of colors that are available for user information is very greatly limited

Methodology Applied

Scientific EffectLight transmission: Absorption (EM radiation)

Data Source

PatentUS10184655B2Display device

Publication Date: 2019.01.22 SCHOTT AG

AI summary

A display device is provided that is a transparent, colored glass-ceramic with a display face on the front, an illumination face on the back, and at least one light-emitting element being disposed in the region of the illumination face. The display device further includes a color compensation filter in the form of a color layer introduced directly or indirectly on the glass ceramics.