Tapered Light-Guiding Members for Dynamic LED Patterns
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Solution Overview
Problem
Existing light emitting devices struggle to easily form a variety of light distribution patterns due to limitations in their design and control mechanisms.
Innovation Solution
The light emitting device incorporates a plurality of light source parts with tapered light-guiding members, where the irradiation light from each part satisfies specific angle conditions, allowing for easy formation of various light distribution patterns by controlling the duty ratio of the light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional light emitting devices with fixed light distribution structures are used, then the device structure is simple, but the ability to form various light distribution patterns is limited
Solution Approach 1:
The patent applies dynamics by making the light distribution characteristics adjustable through duty ratio control of multiple light source parts. The light-guiding members have specific tapered shapes that, when activated in different combinations and duty ratios, dynamically change the light distribution pattern without physical reconfiguration of the device structure.
Solution Approach 2:
The patent changes the parameter of light emission duty ratio to achieve different light distribution patterns. By controlling the duty ratio of each light source part and utilizing the specific tapered angles of light-guiding members, the system can produce various light distribution patterns (spotlight, wall wash, etc.) without altering the physical device structure.
2Adaptability or versatility
If multiple dedicated devices or filters are used to create different light distribution patterns, then various light distribution patterns can be achieved, but installation time and costs increase
Solution Approach 1:
The patent implements universality by designing a single light emitting device that can perform multiple light distribution functions (spotlight, wall wash, ambient lighting, etc.) through control of duty ratios. This multi-functional design eliminates the need for installing multiple dedicated devices or filters, thereby reducing installation time and costs while maintaining versatility.
Solution Approach 2:
The patent merges multiple light source parts with different light-guiding member configurations into a single integrated device. By combining these elements and controlling their duty ratios, the device achieves various light distribution patterns that would otherwise require separate devices, reducing both installation time and overall system complexity.
3Adaptability or versatility
If multiple dedicated devices or filters are used to create different light distribution patterns, then various light distribution patterns can be achieved, but device complexity and costs increase
Solution Approach 1:
The patent implements universality by designing a single light emitting device that can perform multiple light distribution functions (spotlight, wall wash, ambient lighting, etc.) through control of duty ratios. This multi-functional design eliminates the need for installing multiple dedicated devices or filters, thereby reducing installation time and costs while maintaining versatility.
Solution Approach 2:
The patent merges multiple light source parts with different light-guiding member configurations into a single integrated device. By combining these elements and controlling their duty ratios, the device achieves various light distribution patterns that would otherwise require separate devices, reducing both installation time and overall system complexity.
4Ease of operation
If conventional light source arrangements are used, then the device structure is simple, but the ability to control light patterns is limited
Solution Approach 1:
The patent applies dynamics by making the light distribution characteristics adjustable through duty ratio control of multiple light source parts. The light-guiding members have specific tapered shapes that, when activated in different combinations and duty ratios, dynamically change the light distribution pattern without physical reconfiguration of the device structure.
Solution Approach 2:
The patent changes the parameter of light emission duty ratio to achieve different light distribution patterns. By controlling the duty ratio of each light source part and utilizing the specific tapered angles of light-guiding members, the system can produce various light distribution patterns (spotlight, wall wash, etc.) without altering the physical device structure.
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 enables the easy creation of diverse light distribution patterns without the need for multiple devices or dedicated filters, reducing installation time and costs, and allows for simple control of light patterns by varying the duty ratio of the LEDs.
Implementation Method 1
a first light-guiding member (151e) configured to guide light emitted from the light emitting element; each of the at least one first light-guiding member having a tapered shape narrowing toward the first light emitting element
Data Source
AI summary
A light emitting device includes multiple light source parts each including at least one first light source part and at least one second light source part, each including a light emitting element and a light-guiding member to guide light of the light emitting element. Each light-guiding member has a taper shape narrowing toward the light emitting element. Light from each light source part satisfies condition of θ≤α≤tan−1×2 tan θ. (θ is an angle of a straight line connecting a position on the light-irradiation surface having an illuminance of at least one-half of that at center position and the center of the light emitting surface of the first light source part, and α is an angle of a straight line connecting a center of a light-irradiation region on a light-irradiation surface and a center of the light emitting surface of the second light source part.)