Heating Electrode Layout for Low-Temperature Photodiode Response
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Solution Overview
Problem
Conventional detection devices experience a decrease in output response at low temperatures due to the temperature dependence of photoelectric conversion materials, leading to reduced performance in detecting light patterns.
Innovation Solution
A detection device is designed with a planar arrangement of photodiodes, a light source, and a heating electrode that generates heat and conducts it to the photoelectric conversion portion, ensuring optimal operating temperatures for improved output response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the detection device operates at low temperature, then energy consumption is reduced, but the output response of the photodiodes decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the temperature of the photodiodes through the heating electrode. The system changes the thermal parameter from a fixed low temperature to a controlled optimal temperature range, thereby improving the output response while managing energy consumption through selective heating only when needed for detection accuracy.
2Reliability
If a heating electrode is added to maintain optimal temperature, then the output response is improved, but the device complexity increases
Solution Approach 1:
The heating electrode is strategically positioned to serve dual purposes: it functions as both a heating element for temperature control and as part of the structural assembly of the detection device. This merging approach allows the system to improve output response through temperature management without proportionally increasing device complexity, as the heating component is integrated into the existing device architecture.
3Loss of energy
If the heating electrode is positioned close to the photodiodes, then heating efficiency is improved, but the risk of overheating increases
Solution Approach 1:
The system implements feedback control by monitoring the temperature of the photodiodes and adjusting the heating electrode's power accordingly. When the photodiodes reach the optimal temperature range, the heating is reduced or stopped, preventing overheating. This feedback mechanism ensures high heating efficiency through close positioning while mitigating the harmful effect of excessive temperature through active temperature management.
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 maintains and enhances the output response of the detection device by heating the photodiodes, thereby ensuring reliable light pattern detection even at lower temperatures.
Implementation Method 1
a heating electrode provided so as to face the photoelectric conversion portion, and configured to generate heat and conduct the heat to the photoelectric conversion portion
Implementation Method 2
generate heat and conduct the heat to the photoelectric conversion portion
Implementation Method 3
a photoelectric conversion portion in which a plurality of photodiodes are arranged in a planar shape
Data Source
AI summary
A detection device includes a photoelectric conversion portion in which a plurality of photodiodes are arranged in a planar shape, a light source configured to irradiate the photodiodes with light, and a heating electrode provided so as to face the photoelectric conversion portion, and configured to generate heat and conduct the heat to the photoelectric conversion portion.