Surgical LED Light with Swivel Plate and Linear Gear Focusing
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Solution Overview
Problem
Existing surgical lights face challenges with costly and prone-to-failure electric motors for focusing, undesirable adjustments that affect the lamp's center of gravity, and issues with color rendering due to blue light generation in collimator lenses, leading to unnatural color impressions and potential image interference.
Innovation Solution
The surgical light design features pivotable swivel plates with LEDs, a linear gear focusing system that adjusts without moving the lamp housing, and a collimator lens with a specific geometry to minimize blue light, combined with a mix of red, green, and white LEDs for enhanced color rendering and reduced electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electric motors are used to pivot the lighting modules for focusing, then the field diameter can be adjusted, but the cost increases and reliability decreases
Solution Approach 1:
The patent replaces the electric motor system with a purely mechanical focusing mechanism. The lighting modules are mounted on a focusing mechanism that allows manual or automated adjustment through mechanical means such as a focusing wheel or motor-driven gear system that moves the entire lamp head assembly rather than individual modules, eliminating complex electric motors from each module while maintaining field diameter adjustment capability.
Solution Approach 2:
The patent implements a universal focusing mechanism that controls all lighting modules simultaneously through a single adjustment system. Instead of individual motors for each module, a centralized mechanical or motorized focusing system adjusts the entire lamp head or all modules in unison, reducing component count and improving reliability while maintaining adaptability for different field diameters.
2Adaptability or versatility
If the lamp housing is moved for focusing, then the field diameter can be adjusted, but the center of gravity changes causing undesirable rotation
Solution Approach 1:
The patent segments the lighting system into a stable fixed lamp housing and movable lighting modules. The lamp housing remains stationary and rigidly mounted, while only the lightweight lighting modules are made movable through the focusing mechanism. This segmentation allows field diameter adjustment without moving the heavy lamp housing, thus maintaining center of gravity stability and preventing undesirable rotation.
Solution Approach 2:
The patent changes the dimension of movement from translating the entire lamp housing in space to rotating or pivoting only the lightweight lighting modules around a fixed axis. This dimensional change allows focusing adjustment while keeping the lamp housing stationary, maintaining center of gravity stability and avoiding rotation of the entire lamp assembly.
3Illumination intensity
If standard collimator lenses are used, then light can be focused, but blue light is generated causing poor color rendering
Solution Approach 1:
The patent applies local quality by using different types of LEDs in specific positions within the lighting module. Instead of uniform LEDs throughout, the invention places LEDs with different color temperatures and spectral characteristics in different locations or groups, with warmer color LEDs positioned to compensate for blue light generation, thereby improving overall color rendering while maintaining focus capability.
Solution Approach 2:
The patent uses composite LED arrangements combining multiple LED types with different spectral properties. The lighting module integrates LEDs of various color temperatures (including warmer tones) to create a composite light source that focuses light effectively while achieving superior color rendering index by combining the spectral outputs of different LED types.
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 design provides cost-effective, interference-free focusing, maintains the lamp's stability, and achieves a high color rendering index, ensuring homogeneous illumination and improved image recording performance.
Implementation Method 1
a focusing unit designed as a linear gear for focusing the lighting modules
Implementation Method 2
The pivot rods form a rocker arm construction when viewed in conjunction with the adjustment cross and the pivot plates
Implementation Method 3
The balls of the ball joint are preferably made of a plastic with good sliding properties to enable displacement of the rod and angle adjustment
Implementation Method 4
Another aspect of the invention relates to the design of the collimator lens. Collimator lenses are used to focus the light emitted by LEDs
Implementation Method 5
the radius of curvature of the outer surface of the collimator lens, the height of the collimator lens, the light entry surface, the size and geometric design of the light exit surface and the geometry of the light exit surface are coordinated with one another
Implementation Method 6
several LED lighting modules that can be adjusted for focusing
Implementation Method 7
LEDs arranged thereon
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
The invention relates to a light for operating rooms, comprising a light housing (2), several LED illumination modules that are adjustable for focusing purposes, and a unit for focusing the illumination modules. In order to prevent the light from being accidentally moved from the center of gravity on the gimbal mount, the illumination modules encompass a swivel plate (32) which is pivotally mounted on the light housing (2) and is provided with an LED array (34) that is arranged thereon.