Image Display Device Thermal Drift Compensation
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Solution Overview
Problem
Existing image display devices face challenges in maintaining image quality due to variations in light source wavelength caused by heat generation, which existing technologies struggle to effectively address.
Innovation Solution
An image display device comprising an image forming unit, an optical unit, a temperature measuring unit, and a control unit that measures the temperature of the image forming unit and adjusts its operation to stabilize the light source wavelength, ensuring consistent image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is operated at high power to maintain image brightness, then illumination intensity is improved, but temperature increases causing wavelength variation and image quality deterioration
Solution Approach 1:
The patent implements a feedback control system where a temperature sensor continuously monitors the light source temperature, and the control unit adjusts the drive current based on temperature measurements to maintain stable wavelength and image quality while preventing thermal drift
Solution Approach 2:
The patent changes the operating parameters of the light source by dynamically adjusting drive current based on temperature feedback, thereby compensating for thermal effects and maintaining consistent output wavelength and image quality across varying operating conditions
2Reliability
If the light source temperature is stabilized to maintain wavelength consistency, then image quality stability is improved, but the ability to adjust brightness dynamically is restricted
Solution Approach 1:
The patent employs dynamic control where the drive current is continuously adjusted based on real-time temperature measurements, enabling the system to adaptively maintain image quality stability while preserving the ability to change brightness levels as needed during operation
3Reliability
If temperature measurement and control systems are added to compensate for wavelength variation, then image quality stability is improved, but device complexity increases
Solution Approach 1:
The patent implements a self-regulating system where the light source unit includes integrated temperature sensing and control circuitry that automatically monitors and adjusts its own operating parameters, eliminating the need for external complex control systems and reducing overall device complexity
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 effectively prevents deterioration of image quality by compensating for wavelength variations, thereby maintaining stable and high-quality image observation.
Implementation Method 1
a temperature measuring unit which measures a temperature of the image forming unit
Implementation Method 2
a control unit which controls an operation of the image forming unit based on a result of a temperature measurement by the temperature measuring unit
Data Source
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AI summary
An image display device includes an image forming unit, an optical unit, a temperature measuring unit, and a control unit. The optical unit is configured to input and output light that is output from the image forming unit. The temperature measuring unit is configured to measure a temperature of the image forming unit. The control unit is configured to control an operation of the image forming unit based on a result of a temperature measurement by the temperature measuring unit.