Multi-Wavelength Status Lights for Color-Blind Printer Recognition
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Solution Overview
Problem
Users with color vision deficiency may struggle to recognize information indicated by light sources in electronic equipment, which is a concern for achieving SDGs Goal 10: Reduce inequality within and among countries.
Innovation Solution
An image forming apparatus and electronic equipment utilize a light emission unit with multiple light sources emitting different wavelengths, operating in various modes to indicate status, enhancing visibility for users with color vision deficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single color light source is used to indicate status, then the device complexity is reduced, but users with color vision deficiency cannot recognize the information
Solution Approach 1:
The patent combines multiple light sources (red, green, blue LEDs) into a single integrated light emission unit. This merging approach allows the unit to display multiple colors and patterns to convey different status information, making it accessible to users with color vision deficiency while maintaining a relatively simple overall device structure.
Solution Approach 2:
The light emission unit dynamically changes its emission patterns by selectively activating different combinations of light sources. It can display various colors (red, green, blue, yellow, cyan, magenta) and patterns (simultaneous emission, sequential emission, blinking patterns) to indicate different statuses, thereby providing accessible information without requiring complex additional components.
2Adaptability or versatility
If multiple light sources are provided separately, then the likelihood of recognition by color vision deficient users increases, but waste generation increases and disposal becomes more difficult
Solution Approach 1:
Multiple light sources are merged into a single integrated light emission unit with a common housing and mounting structure. This consolidation reduces the number of separate components that would otherwise be discarded individually, thereby reducing waste generation and simplifying disposal procedures while maintaining the ability to provide accessible visual feedback.
Solution Approach 2:
The light emission unit serves multiple functions by using different combinations of light sources to indicate various statuses (normal operation, errors, warnings, etc.). This multi-functionality eliminates the need for separate indicator devices for different statuses, reducing overall waste while improving recognizability for users with color vision deficiency.
3Adaptability or versatility
If multiple light sources are used in different configurations, then information indication capability is improved, but the service life of the light emission unit decreases
Solution Approach 1:
The system dynamically selects which light sources to activate based on the current status being indicated. Not all light sources operate continuously at full intensity simultaneously, which reduces overall wear and energy consumption. The control unit manages the operation patterns (simultaneous emission, sequential emission, blinking) to extend the service life of the light emission unit while maintaining versatile information indication capability.
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 improves accessibility for users with color vision deficiencies, contributing to reducing inequality and promoting sustainable consumption and production patterns, while extending the service life of the light emission unit and reducing waste generation.
Implementation Method 1
a light emission unit that indicates status of either one, or both, of the image forming unit and the transport unit by using a plurality of light sources including a first light source that emits light having a first wavelength, a second light source that emits light having a second wavelength, and a third light source that emits light having a third wavelength
Data Source
AI summary
An image forming apparatus includes an image forming unit that forms an image on a medium; a transport unit that transports the medium; and a light emission unit that indicates status of either one, or both, of the image forming unit and the transport unit by using a plurality of light sources including a first light source, a second light source, and a third light source, wherein the light emission unit is configured to perform light emission based on a first light emission mode in which the first light source and the second light source are on at a same time and perform light emission based on a second light emission mode in which the first light source and the third light source are on at a same time.