Stacked Liquid Crystal Panel Layout for Twist-Free Light Rotation
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Solution Overview
Problem
Existing illumination devices with rotatable light distribution patterns face issues of wire damage due to twisting when the tubular members with fixed liquid crystal panels are rotated relative to the control substrate, leading to potential damage at coupling portions between wires and control substrates.
Innovation Solution
The illumination device employs two control substrates connected by relay substrates through wire harnesses and flexible printed circuit boards, with four liquid crystal panels stacked and electrically coupled to these substrates, allowing for rotation without twisting the wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the first tubular member is rotated relative to the second tubular member to rotate the light distribution pattern, then the adaptability or versatility is improved, but the reliability deteriorates due to wire twisting and potential damage at coupling portions
Solution Approach 1:
The illumination device is divided into multiple independent tubular members (first tubular member, second tubular member, third tubular member) that can rotate relative to each other. This segmentation allows the light distribution pattern to be rotated by moving individual segments rather than twisting the entire assembly, thereby preventing wire damage while achieving the desired adaptability.
2Ease of manufacture
If wires are used to electrically couple the liquid crystal panel and control substrate, then the ease of manufacture is improved, but the reliability deteriorates due to twisting damage during rotation
Solution Approach 1:
Different portions of the electrical coupling system are designed with different properties: the first tubular member containing the liquid crystal panel is made rotatable relative to the second tubular member containing the control substrate. This local differentiation in rotational capability allows wires to remain stationary in the control substrate while the liquid crystal panel rotates, preventing wire twisting while maintaining ease of electrical coupling.
Data Source
AI summary
According to an aspect, an illumination device includes: two control substrates; two relay substrates electrically coupled to the two respective control substrates through respective wire harnesses; and four liquid crystal panels electrically coupled to the two relay substrates through flexible printed circuit boards. Four of the flexible printed circuit boards are provided. Two of the four liquid crystal panels are electrically coupled to one of the two relay substrates through the corresponding flexible printed circuit boards. The other two of the four liquid crystal panels are electrically coupled to the other of the two relay substrates through the corresponding flexible printed circuit boards. The four liquid crystal panels are provided in a state of being stacked in a first direction.