Blade Drive Module Heat Dissipation for Infrared Imaging

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Solution Overview

Problem

Infrared cameras and other imaging devices face issues with reduced calibration accuracy and light leakage due to thermal deformation and increased temperature of blade members, affecting image quality and performance.

Innovation Solution

A blade driving module with a blade supporting member, a movable blade member, and an actuator, where the supporting member has a containing portion and an exposed heat dissipating portion to manage temperature and prevent thermal deformation, featuring a heat dissipating plate and aperture plate to efficiently dissipate heat away from the blade member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If blade members are used to control light in infrared cameras, then light control and calibration are improved, but thermal deformation and temperature increase cause reduced calibration accuracy and light leakage

Engineering Contradiction:

Improvecalibration accuracyVSAvoidblade member temperature

Core Design Contradiction:

Measurement precisionVSTemperature

Solution Approach 1:

The blade supporting member is divided into two distinct portions: a containing portion that houses the blade member and actuator, and an exposed portion that is arranged in parallel to the containing portion. This segmentation allows the exposed portion to act as a heat dissipation structure, separating the functional containment area from the thermal management area, thereby reducing the temperature of the blade member while maintaining its light control function

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The solution introduces a spatial dimension for heat dissipation by adding the exposed portion that extends in parallel to the containing portion. This creates a three-dimensional heat dissipation pathway that allows thermal energy to escape from the blade member without interfering with the optical path, effectively managing temperature while preserving calibration accuracy

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If blade members are used to control light in imaging devices, then light control is improved, but thermal deformation causes light leakage and performance loss

Engineering Contradiction:

Improveblade member performanceVSAvoidblade member temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent converts the harmful thermal energy that causes blade deformation into a beneficial heat dissipation mechanism. The exposed portion of the blade supporting member is specifically designed to expose heat to the external environment, transforming the thermal problem into a controlled heat dissipation process that prevents blade deformation and maintains reliable performance

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 solution improves calibration accuracy, reduces light leakage, and minimizes the risk of thermal deformation-related performance issues by effectively dissipating heat, maintaining image quality across various imaging devices.

Implementation Method 1

an exposed portion that is arranged in parallel to the containing portion

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 2

an exposed portion that is arranged in parallel to the containing portion

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS10942060B2Blade drive module, imaging unit provided with blade drive module, and imaging device

Publication Date: 2021.03.09 COPAL CO LTD

AI summary

Reduces an increase in temperature of the blade member. Comprises: a blade supporting member, disposed forward of a photodetecting sensor that acts as a thermal source, having an opening 1a through which passes light that is to be incident into the photodetecting sensor; a blade member, supported movably on the blade supporting member, for opening and closing the opening; an actuator for driving the blade member open and closed, wherein: wherein the blade supporting member comprises a containing portion 1b, for containing the blade member and the actuator on a front or rear surface that is perpendicular to the optical axis of the opening, and an exposed portion that is arranged in parallel to the containing portion.