Color Wheel Housing with Through Hole for Heat-Resistant Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional synchronization technologies for projection systems, particularly those using black light absorbing tape and detecting apparatus, suffer from reduced accuracy due to temperature fluctuations in high-temperature environments.
Innovation Solution
A color wheel assembly with a housing that separates the detecting apparatus from the color wheel, utilizing a light transmitting plate and a marking object on the color wheel's substrate to reduce heat transfer, allowing for stable operation of the detecting apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detecting apparatus is placed close to the color wheel for detection, then the detection function is achieved, but the heat from the color wheel affects the detecting apparatus and reduces its accuracy
Solution Approach 1:
The housing is divided into multiple surfaces with different functions: the first surface provides heat shielding while the second surface allows detection. This segmentation separates the heat-exposed region from the detection region, allowing the detecting apparatus to function accurately without direct heat exposure.
Solution Approach 2:
The first surface of the housing acts as an intermediary barrier between the color wheel and the detecting apparatus. It blocks direct heat transmission while allowing the detection signal to pass through the second surface, mediating the interaction between the hot color wheel and the temperature-sensitive detector.
2Object-affected harmful factors
If the housing completely encloses the color wheel for heat isolation, then the detecting apparatus is protected from heat, but the detection signal cannot pass through
Solution Approach 1:
The housing has different properties at different locations: the first surface provides heat blocking, while the second surface provides signal transmission. This local differentiation allows simultaneous achievement of heat protection and signal detection by optimizing each surface for its specific function.
Solution Approach 2:
The detection is performed from a different spatial dimension (through the second surface) rather than directly from the heat-exposed side. This dimensional approach allows the detection path to be separated from the heat path, enabling both heat isolation and signal transmission.
3Object-affected harmful factors
If the first surface is made large for better heat shielding, then the heat protection is improved, but the distance between the detecting apparatus and marking object increases
Solution Approach 1:
The color wheel rotates to dynamically bring the marking object into the detection position. This dynamic approach allows the system to achieve both heat shielding (through the first surface) and close detection distance (through rotational positioning) by separating the static heat barrier function from the dynamic detection function.
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 reduces the impact of heat on the detecting apparatus, maintaining its accuracy and stability even in high-temperature conditions.
Implementation Method 1
a light transmitting plate covering the first through hole, wherein the probe head is disposed on a side of the light transmitting plate that faces away from the color wheel
Implementation Method 2
the probe head of the detecting apparatus emits a signal toward the motor, which is reflected by the motor and received by the probe head
Data Source
AI summary
A color wheel assembly includes a color wheel fixed in a housing and a detecting apparatus for generating a synchronization signal. The color wheel is driven to rotate and has a marking object rotating with it. The housing has a first surface parallel to and adjacent a surface of the color wheel where the marking object is located. The first surface of the housing has a first through hole at a location within an annular region corresponding to the marking object when the color wheel rotates by one revolution. The detecting apparatus is disposed on the back side of the first through hole and a probe head of the detecting apparatus is disposed in the first through hole for detecting the marking object on the color wheel. The structure insulates the probe head from heat emitted from the color wheel. A related light source system is also disclosed.