Dual-Sided Illumination Board Wiring to Prevent False Light Indication
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Solution Overview
Problem
In illumination devices with light sources on opposite faces of a transparent insulator board, light from one side can pass through and mislead users into thinking the light source on the opposite side is turned on, even if it is not.
Innovation Solution
The illumination device incorporates first and second wiring patterns on each face of the board, respectively, to block light from one source from reaching the opposite side, ensuring that each light source's status is accurately recognizable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light sources are arranged on two opposite faces of a transparent board, then the illumination device can provide both illumination and indicator functions, but light from one source may pass through the board and cause user misrecognition of the other light source's status
Solution Approach 1:
A light blocking member is introduced as an intermediary element between the first and second light sources. This member selectively blocks light from the first light source from reaching the second face of the board, preventing false illumination that would mislead users about the indicator light's status. The light blocking member acts as a mediator that resolves the conflict between having both light sources on opposite faces and maintaining accurate status recognition.
2Loss of information
If a light blocking member is added to prevent light from passing through the board, then user recognition of light source status is improved, but the device structure becomes more complex
Solution Approach 1:
The light blocking member is implemented as a thin film or sheet that can be integrated into the board structure. This approach minimizes the added complexity by using a flexible, thin element rather than a bulky component. The light blocking member can be positioned between the board and the first light source, effectively blocking light without significantly increasing the overall device complexity.
3Illumination intensity
If the board is made transparent for light to allow illumination function, then illumination effectiveness is improved, but light from one source passes through to the opposite side causing misrecognition
Solution Approach 1:
The light blocking property is applied locally rather than globally to the entire board. The light blocking member is positioned specifically between the first light source and the second face of the board, creating a localized light-blocking zone. This allows the board to remain transparent overall for effective illumination, while selectively blocking light only in the specific region where it would cause misrecognition of the indicator light status.
Data Source
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AI summary
An illumination device includes: a board having a first face and a second face opposite to the first face; a first light source disposed on the first face; a second light source disposed on the second face; and a second wiring pattern disposed on the second face, wherein the second wiring pattern is disposed so as to cover a region on the second face, the region on the second face opposed to a region on the first face with the first light source disposed therein.