Refrigerator Door Lighting System for Visual Door State Indication
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Solution Overview
Problem
Existing refrigerators do not provide a convenient way to indicate the open state, angle, speed, or closing speed of the door, requiring users to manually check or replace decoration panels for appearance changes.
Innovation Solution
A refrigerator with a lighting system that includes LEDs, a sensing part (acceleration or gyro sensor), and a controller to change the light pattern based on door opening angle, speed, and closing speed, allowing the door to glow different colors to notify the user of its state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a decoration panel is installed on the door front to change outer appearance, then the aesthetic appearance is improved, but the entire panel must be removed and replaced when changing appearance, resulting in loss of time and inconvenience
Solution Approach 1:
The decoration panel is divided into multiple independently replaceable light emitting members (LEDs) arranged in arrays. Instead of replacing the entire panel, users can replace individual LEDs or small groups, significantly reducing replacement time and effort while maintaining aesthetic appearance.
Solution Approach 2:
Multiple identical or variant LED modules are arranged in arrays across the door front. These modules can be individually replaced or reconfigured to achieve different appearance effects without replacing the entire decoration system.
2Device complexity
If no indication system is provided on the door, then the device complexity is reduced, but the user cannot easily detect the door's open state, angle, or speed, resulting in loss of information
Solution Approach 1:
Different colors of light emitting members are used to indicate different door states: green LEDs indicate normal operation, yellow LEDs indicate warning conditions, and red LEDs indicate critical states. The glowing area and color patterns provide intuitive visual information about door position, opening speed, and closing speed without complex displays.
Solution Approach 2:
Door state information is transmitted through the visual dimension using light emission patterns rather than mechanical indicators or digital displays. The glowing area, color, and intensity of LEDs provide multi-dimensional information about door state in a simple, intuitive manner.
3Adaptability or versatility
If the entire decoration panel is replaced to change appearance, then the outer appearance can be changed, but the cost and complexity of the system increases
Solution Approach 1:
The decoration system is segmented into multiple independent LED modules that can be individually replaced or reconfigured. This allows for appearance changes without replacing the entire panel, reducing complexity and cost while maintaining versatility.
Solution Approach 2:
The LED modules serve multiple functions: they provide aesthetic decoration, indicate door state information through color changes, and can be individually replaced to achieve different appearance configurations. This multi-functionality reduces the need for separate systems.
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
Enables users to easily check the open state, angle, and speed of the door, and provides visual warnings for fast closing speeds, enhancing user interaction and safety without needing to replace decoration panels.
Implementation Method 1
a lighting device including a light source, and a front plate through which light emitted from the light source transmits
Data Source
AI summary
A home appliance, according to one aspect, comprises: a cabinet that has a space; a door that opens and closes the space and includes a lighting device having a light source and a front plate through which light irradiated from the light source passes; a detection unit that detects opening of the door, and a control unit that controls the lighting device on the basis of information detected by the detection unit, wherein the control unit controls the light source such that the light source changes from a first state to a second state upon the opening of the door.