Projector Light Adjustment Mechanism Overheating Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projectors face overheating issues in their light adjustment devices due to insufficient cooling, especially when the light source has high output or when the light adjustment device and light source are close, leading to complex temperature control challenges.
Innovation Solution
A projector system that includes an image acquiring unit, a modulating unit, a light adjustment mechanism, and a light adjustment control unit, which stops light adjustment control when predetermined conditions are met, such as no image input or when the light adjustment device is fully open, to prevent overheating and improve processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the light adjustment mechanism continuously reduces light amount to expand dynamic range, then image quality is improved, but the light adjustment device overheats due to light absorption and scattering
Solution Approach 1:
The patent implements periodic action by alternately switching between light adjustment mode and light transmission mode. The control unit determines based on image luminance whether to reduce light amount (improving image quality) or allow full light transmission (preventing overheating), creating a cyclic operation pattern that resolves the contradiction between image quality and temperature control.
2Temperature
If a cooling device is added to prevent overheating of the light adjustment device, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent replaces the mechanical cooling system with a control-based approach. Instead of adding physical cooling devices (fans, heat sinks, etc.), the system uses a control unit that dynamically adjusts the light adjustment mechanism's operation based on image luminance conditions, substituting mechanical temperature control with intelligent operational control.
Solution Approach 2:
The light adjustment device serves itself by the control unit monitoring image luminance and automatically determining when to switch between light reduction and light transmission modes. The system self-regulates its temperature through intelligent control without requiring external cooling devices or complex temperature sensing systems.
3Manufacturing precision
If the light adjustment control is continuously executed to optimize image luminance, then image quality is improved, but processing efficiency decreases due to unnecessary control operations
Solution Approach 1:
The patent applies partial action by executing light adjustment control only when necessary - specifically when image luminance falls within a predetermined range where light reduction would be beneficial. When luminance is already high or low, the control unit skips light adjustment operations, performing only the necessary portion of control rather than continuous adjustment, thus improving processing efficiency while maintaining image quality.
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 configuration prevents overheating of the light adjustment mechanism by optimizing light reduction levels and ensuring efficient cooling, thereby maintaining the projector's performance and extending its operational lifespan.
Implementation Method 1
the light shielding plate may become overheated by absorption and scattering of light
Implementation Method 2
the light shielding plate may become overheated by absorption and scattering of light
Implementation Method 3
a cooling device for cooling the light shielding plate is provided
Implementation Method 4
a cooling device for cooling the light shielding plate is provided
Data Source
AI summary
A projector modulates light emitted from a light source and projects the light, the projector including an image acquiring unit, a modulating unit, a light adjusting mechanism, and a light adjusting control unit. The image acquiring unit acquires an image from an image source. The modulating unit modulates the light emitted from the light sources, based on the image acquired by the image acquiring unit. The light adjustment mechanism reduces an amount of light incident on the modulating unit from the light source. The light adjustment control unit performs light adjustment control by the light adjustment mechanism, based on the image acquired by the image acquiring unit. The light adjustment control unit performs control to increase the amount of light incident of the modulating unit when the light adjustment mechanism maintains a predetermined light-adjusted state.