Electronic Device Optical Output Multiplexing
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Solution Overview
Problem
Existing electronic devices using full color LEDs with red, green, and blue LED chips face difficulties in accurately conveying information due to deviations in optical axes, making it hard for users to recognize the output light from various angles.
Innovation Solution
Incorporating multiple light sources (red, blue, and green) with distinct wavelengths and using a multiplexing mechanism to combine their light, which is then output through a common optical axis via optical fibers and a diffusion lens, ensuring the light is visible from different locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a full color LED with red, green, and blue LED chips is used to increase information types, then the types of information that can be conveyed are increased, but the optical axes of the LED chips are deviated making it difficult for users to view light of some colors from certain locations
Solution Approach 1:
The patent divides the light sources into separate LED chips (red, green, blue) mounted on a circuit board, with each chip having its own optical axis. By segmenting the light sources and using a diffusion plate, the system maintains color diversity while ensuring all colors are visible from various viewing angles, resolving the contradiction between information types and visibility.
2Loss of information
If multiple LED chips of different colors are used, then more information can be conveyed, but the optical axes of these chips are deviated causing viewing angle problems
Solution Approach 1:
The patent introduces a diffusion plate as an intermediary element between the LED chips and the user. This diffusion plate scatters the light from all LED chips (red, green, blue) in multiple directions, ensuring that users can view all color information from various angles without being constrained by the deviated optical axes of individual LED chips.
3Illumination intensity
If LED chips with different optical axes are used to provide multiple colors, then color diversity is achieved, but users may miss some colors depending on their position relative to the device
Solution Approach 1:
The patent transitions from a one-dimensional viewing constraint (direct line-of-sight to each LED chip's optical axis) to a three-dimensional viewing solution by introducing a diffusion plate that scatters light in multiple directions. This dimensional change ensures that users at any position relative to the device can reliably recognize all color information, eliminating the position-dependent visibility problem.
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 configuration allows users to accurately recognize information from electronic devices by ensuring that both red and blue light outputs are visible along a common optical axis, reducing the likelihood of missing either color and enhancing visibility regardless of the user's position relative to the device.
Implementation Method 1
a light output unit (16) that outputs the multiplexed light; wherein the optical fiber is connected between the LED chip and the light output unit (16)
Implementation Method 2
ensuring the light is visible from different locations
Data Source
AI summary
In order to provide an electronic device and the like that enable a user to accurately recognize information being output from the electronic device or the like via a light source, an electronic device according to the present disclosure includes: a first light source that outputs first light of a first wavelength; a second light source that outputs second light of a second wavelength different from the first wavelength; a multiplexing means for multiplexing the first light and the second light and outputting multiplexed light; and an output means for outputting the multiplexed light.