Light Beam Framing System: Five-Bar Linkage for Reliable Shaping
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Solution Overview
Problem
Existing framing systems for shaping light beams are prone to manufacturing difficulties and mechanical failures, particularly due to the breaking of toothed sides on shutter blades and require precise control to avoid misalignment, leading to operational inefficiencies.
Innovation Solution
A framing system comprising a first and second shutter system with blades arranged on opposite sides of a blade divider, utilizing a five-bar linkage mechanism with motorized bars longer than the aperture, and guided by blade guides to ensure precise movement and reduce overheating, featuring an anti-collision system for controlled blade operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If shutter blades are arranged in a merged pile with toothed sides for controlled movement, then the framing system can adjust the light beam shape, but the toothed sides tend to break during long-term use and require very controlled movement to avoid misalignment
Solution Approach 1:
The patent replaces the traditional rack and pinion mechanical system with a cable-pulley mechanical system. The cables run through guide channels in the shutter blades and are pulled by motors to open/close the shutters, eliminating the need for toothed sides that are prone to breaking. This substitution maintains controlled movement while significantly improving reliability during long-term use.
2Manufacturing precision
If multiple shutter blades are arranged close together for precise framing, then the light beam shaping precision is improved, but the risk of overheating increases due to reduced heat dissipation space
Solution Approach 1:
The patent arranges shutter blades in a three-dimensional configuration rather than a single flat plane. The blades are positioned at different depths and angles, allowing precise light beam shaping while creating channels and spaces for heat dissipation. This spatial arrangement reduces overheating risk by improving airflow and heat distribution throughout the fixture.
3Volume of moving object
If the framing system uses a compact design with all components in one plane, then the device size is reduced, but the complexity of controlling blade movement increases to prevent misalignment
Solution Approach 1:
The patent divides the shutter control system into independent modular units, with each shutter blade having its own dedicated motor and cable mechanism. This segmentation allows each blade to be controlled independently without affecting others, reducing the overall control complexity despite the compact three-dimensional arrangement of multiple blades in different planes.
Data Source
AI summary
The present disclosure provides a dynamic framing system for shaping a light beam. The framing system comprises a first shutter system comprising a first blade and a second blade, a second shutter system comprising a third blade and a fourth blade, and a blade divider forming an aperture. The first shutter system and the second shutter system are arranged on opposite sides of the blade divider. Each blade constitutes an intermediate bar in a five-bar linkage between two sets of outer bars, each set comprising a motorized bar and a passive bar. At least one of the motorized bars has a length being larger than a diameter of the aperture.