Cooktop Knob Assembly Light Diffusion for Uniform Brightness
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Solution Overview
Problem
Existing cooktop knob assemblies suffer from inconsistent light brightness, leading to reduced user recognition and aesthetic issues due to the placement of light sources at one end of light guides, resulting in uneven illumination.
Innovation Solution
Incorporating a light diffusing part between the knob body and knob ring, with a light source irradiating light between them, ensuring uniform light emission and improved visibility by reflecting light on both surfaces, and positioning the light diffusing part further rearward than the knob ring to prevent lateral light dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light source is disposed at one end of the light guide path, then the structure is simple, but the light brightness is uneven (one end is bright, the other end is dark)
Solution Approach 1:
A light diffusing part is introduced as an intermediary component between the light source and the light guide path. This diffusing part receives light from the light source and redistributes it uniformly along the light guide path, eliminating the brightness unevenness caused by the one-end light source configuration while maintaining the simple overall structure.
Solution Approach 2:
The light diffusing part is strategically positioned at specific locations within the light guide assembly to address local brightness issues. By placing the diffusing part where light needs redistribution, the solution achieves uniform illumination without requiring a complete redesign of the entire light guide structure.
2Ease of manufacture
If the light source is disposed at one end of the light guide path, then the manufacturing is simple, but the user recognition of operation is reduced due to uneven lighting
Solution Approach 1:
The light diffusing part serves as a mediator that enhances operation visibility by uniformly distributing light along the knob assembly. This allows users to clearly see the operation state without complicating the manufacturing process, as the diffusing part can be easily integrated into the existing light guide assembly.
3Illumination intensity
If the light diffusing part is positioned at the front of the knob assembly, then light distribution is improved, but lateral light dispersion occurs reducing visibility
Solution Approach 1:
The light diffusing part is positioned at a specific rearward location within the knob assembly rather than at the front. This localized positioning ensures uniform light distribution while preventing lateral light dispersion, as the diffusing part is contained within the knob ring structure that guides light forward without sideways leakage.
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 solution achieves constant brightness around the knob body, enhancing user recognition and aesthetic appeal by ensuring uniform light distribution and improved visibility.
Implementation Method 1
a light diffusing part disposed between the knob body and the knob ring... the light irradiated from the light source part may be emitted to a front of the knob assembly through the light diffusing part, thereby making it possible to emit uniform light to the front of the knob assembly regardless of areas
Implementation Method 2
at least a portion of a rear surface of the knob body and at least a portion of a front surface of the knob ring may reflect light, thereby improving visibility
Data Source
AI summary
A cooktop includes a knob assembly coupled to a control panel and controlling a heating part. The knob assembly includes: a knob body disposed at a front surface of the control panel and rotating around a rotation shaft, a knob ring disposed at a rear side of the knob body and having a diameter greater than a diameter of the knob body, a light diffusing part disposed between the knob body and the knob ring, and a light source part comprising one or more light sources irradiating light. A diameter of the light diffusing part is greater than the diameter of the knob body and less than the diameter of the knob ring, a front surface of the light diffusing part is exposed between the knob body and the knob ring, and one of the light sources irradiates light between the knob body and the knob ring.