Light-Emitting Module with Rotating Substrate for Pattern Control
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Solution Overview
Problem
Existing light emitting modules lack the ability to dynamically change the light distribution pattern.
Innovation Solution
A light emitting module comprising a substrate with individually controllable light sources, a light shielding member, a first lens, and a drive unit that rotates the substrate, allowing the angles of rotation and optical axes of different light sources to differ, enabling the formation of distinct irradiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the casing is rotated to mix light and eliminate nonuniformity, then color temperature uniformity is improved, but the light distribution pattern becomes constant and cannot be changed
Solution Approach 1:
The patent applies dynamics by making the lens rotatable relative to the light sources. The lens can rotate between a first position for mixing light to achieve uniform color temperature, and a second position for projecting light in specific patterns. This dynamic adjustment allows the system to switch between different operational modes, resolving the contradiction between achieving uniformity and enabling pattern changeability.
Solution Approach 2:
The patent segments the optical system into independently controllable components: light sources, a rotatable lens, and a housing. By separating the lens rotation function from the light source arrangement, the system can independently control light mixing (for uniformity) and light projection (for patterns), allowing both uniform color temperature and changeable distribution patterns to be achieved at different times.
2Adaptability or versatility
If multiple light sources are arranged with different angles to the rotation axis, then light distribution patterns can be changed, but the structure becomes more complex
Solution Approach 1:
The patent makes the single lens multi-functional by enabling it to rotate to different positions. The same lens serves both to mix light uniformly (when positioned in the first orientation) and to project light in various patterns (when positioned in the second orientation). This eliminates the need for multiple specialized lenses or complex optical systems, reducing overall device complexity while maintaining pattern changeability.
Solution Approach 2:
The dynamic rotation capability of the lens allows a simple, fixed arrangement of light sources to produce multiple light distribution patterns. Instead of requiring complex mechanical arrangements of multiple light sources at different angles, the system uses a simple light source array combined with a rotatable lens, significantly reducing structural complexity while achieving versatile pattern control.
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 module can dynamically change the light distribution pattern, providing flexibility in light projection and ensuring uniform illumination across various distances and subjects.
Implementation Method 1
a first lens disposed above the light sources and on which the light emitted by each of the light sources becomes incident
Data Source
AI summary
A light emitting module includes: a substrate; a plurality of light sources fixed on the substrate and generating individually controllable outputs; a light shielding member disposed between the light sources; a first lens that is disposed above the light sources and on which the light emitted from each of the light sources becomes incident; and a drive unit capable of rotating the substrate. The light sources include a first light source and a second light source. The angle formed by the axis of rotation of the substrate and the optical axis of first light emitted by the first light source and exiting the first lens differs from the angle formed by the axis of rotation and the optical axis of second light emitted by the second light source and exiting the first lens. The second light can irradiate a first circular track having the axis of rotation as its center.