Adjustable LED Illumination via Segmented Light Sources
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Solution Overview
Problem
Existing illuminating devices with light-emitting diodes (LEDs) project light in fixed angles, which cannot be adjusted, and require mechanically movable optical elements to change projection angles, increasing manufacturing complexity and inconvenience.
Innovation Solution
An illuminating device with adjustable light beams is developed, comprising a substrate, multiple light-emitting units, and a driving unit, where the light-emitting units are arranged in specific patterns and an optical element is used to control light beams, allowing for electronic adjustment of light emission angles and intensities, forming beams in variable shapes and projection angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanically movable optical element is used to adjust projection angles, then the projection angle can be changed, but the manufacturing process steps are increased and convenience is reduced
Solution Approach 1:
The light-emitting units are divided into multiple sets arranged in different regions (innermost ring, outermost ring, etc.), with each set capable of emitting light at different angles. This segmentation allows independent control of each region to achieve various projection angles without requiring movable optical elements.
Solution Approach 2:
The patent replaces the mechanical movable optical element with an electronic control system that selectively activates different sets of light-emitting units. The driving unit electronically controls which light-emitting units are activated to achieve the desired projection angle, eliminating the need for mechanical movement.
2Adaptability or versatility
If light-emitting units are arranged in specific regions to emit light at different angles, then adjustable projection angles are achieved, but the device structure becomes more complex
Solution Approach 1:
The light-emitting units are segmented into multiple sets arranged in concentric rings or rectangular regions, with each set positioned at specific distances from the optical element. This spatial segmentation enables different light emission angles and beam shapes to be achieved by selectively activating different segments.
Solution Approach 2:
Different regions of light-emitting units are assigned different emission characteristics. The innermost ring emits at smaller angles while the outermost ring emits at larger angles, creating local variations in light emission properties that enable diverse beam shapes and angles without additional components.
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 solution enables illuminating devices to produce light beams with adjustable shapes and projection angles by electronically controlling light-emitting units, overcoming the limitations of fixed-angle projection and mechanically movable optical elements, thus enhancing flexibility and efficiency.
Implementation Method 1
The optical element has an optical surface containing a sphere or not containing a sphere, a Fresnel optical surface or a microstructured optical surface
Implementation Method 2
The optical element comprises a lens, a reflector or a refraction plate
Data Source
AI summary
An illuminating device with adjustable light beams and a method for assembling the same. The light-emitting units are disposed on the substrate. The optical element is disposed in the path of a light emitted by at least one of the light-emitting units. The driving unit drives a first or second set of the light-emitting units, wherein a light beam formed by light that is emitted by the first set of the light-emitting units and passes through the optical element has a different shape or projection angle from a light beam formed by light that is emitted by the second set of the light-emitting units and passes through the optical element.