Surgical Lamp Light Field Shape Control
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Solution Overview
Problem
Surgical lamps with fixed light field shapes and intensity distributions are inadequate for varying surgical scenarios, leading to potential shadowing and suboptimal illumination, especially when the distance between the lamp and the operating site changes.
Innovation Solution
A surgical lamp with multiple illuminants, including LEDs, that can be independently dimmed and turned on/off, and a control device to adjust the light field shape and intensity distribution based on distance and brightness sensors, allowing for non-circular light field configurations such as rectangular, triangular, or oval shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single reflector lamp is used with a fixed light source position, then the light field shape is circular and the structure is simple, but the light field diameter and intensity distribution cannot be adjusted for different surgical scenarios
Solution Approach 1:
The surgical lamp divides the illumination system into multiple independent illuminants (first, second, and third illuminants) with distinct light emission characteristics. Each illuminant can be controlled separately to create different light field configurations, enabling adaptability without requiring complete mechanical reconfiguration of the entire system.
Solution Approach 2:
The patent implements dynamic control of light field characteristics by independently adjusting the intensity of each illuminant through electronic dimming controls. This allows the light field shape and intensity distribution to be dynamically adapted to different surgical scenarios without physical mechanical adjustments.
2Illumination intensity
If multi-reflector lamps are used to adjust light field shape, then the light field can be adapted to different shapes, but several light points are projected in the operating area when the distance increases, creating non-homogenous illumination
Solution Approach 1:
Each illuminant is designed with specific light emission characteristics tailored to its function. The first and second illuminants emit light along the central axis for homogeneous central illumination, while the third illuminant emits light offset from the central axis to illuminate peripheral areas. This local optimization of light quality ensures homogeneous illumination across the entire operating area at various distances.
Solution Approach 2:
The control device receives input from brightness sensors that detect the actual light distribution in the operating area. Based on this feedback, the control device automatically adjusts the intensity of each illuminant to maintain homogeneous illumination and eliminate shadowing effects, regardless of the distance between the lamp and operating site.
3Adaptability or versatility
If mechanical adjustments are used to change light field characteristics, then the light field can be adapted to different configurations, but the adjustment process is time-consuming and complex
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with an electronic control system. The control device electronically regulates the intensity of each illuminant based on input from brightness sensors and user preferences, eliminating the need for time-consuming mechanical adjustments of reflectors or light source positions while maintaining full adaptability of light field characteristics.
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
Enables adjustable light field shapes and intensity distributions without mechanical adjustments, reducing shadowing and ensuring optimal illumination across different surgical sites and distances, adhering to international standards for light field characteristics.
Implementation Method 1
The first illuminant is configured to emit a first bundle of light beams, the second illuminant is configured to emit a second bundle of light beams
Implementation Method 2
an axis of the third bundle of light beams is directed to a point offset from the central axis
Data Source
AI summary
A surgical lamp includes a lamp body with illuminants emitting bundled light beams with axes intersect a central axis of the lamp body, and illuminants emitting bundled light beams with axes that do not intersect the central axis. The shape of the light field and the distribution of the light intensity can be modified by driving different illuminants.