Light Receiving Device Temperature Compensation
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Solution Overview
Problem
Existing light receiving and emitting devices face accuracy issues in compensating for temperature characteristics due to aging deterioration, as pre-acquired compensation information becomes less effective over time, leading to degraded measurement results and luminosity unevenness in lighting applications.
Innovation Solution
A light receiving device, light emitting device, and light receiving/emitting device equipped with a temperature information acquisition unit, storage unit, control unit, generation unit, and compensation unit that dynamically generates and updates compensation information by changing the device to multiple temperature states, allowing for accurate compensation of temperature characteristics without the need for large-scale facilities like thermostatic chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pre-acquired compensation information is used for temperature compensation, then compensation can be performed without large-scale facilities, but compensation accuracy degrades due to aging deterioration
Solution Approach 1:
The patent transforms static pre-acquired compensation information into dynamic real-time compensation data by having the optical element undergo temperature cycles during operation. The compensation information is continuously updated based on actual temperature-characteristic relationships measured during use, making the system adaptive to aging effects while avoiding the need for complex external testing facilities.
Solution Approach 2:
The optical element itself serves as the measurement tool by utilizing its own temperature characteristics during normal operation. The system measures the relationship between temperature and optical characteristics using the element's inherent properties, eliminating the need for external thermostatic chambers or specialized testing equipment.
2Measurement precision
If compensation information is updated in real-time through temperature cycling, then compensation accuracy is maintained despite aging, but measurement time increases due to temperature stabilization requirements
Solution Approach 1:
The patent performs temperature compensation measurements during the optical element's normal operational periods rather than requiring separate dedicated measurement time. The temperature cycling and compensation data acquisition occur continuously as part of regular operation, utilizing otherwise idle measurement capabilities to maintain accuracy without adding significant time overhead.
Solution Approach 2:
The system performs temperature cycling over a range that exceeds the immediate operational requirements to ensure comprehensive characterization of temperature effects. This partial excess action captures the full temperature-characteristic relationship, enabling accurate compensation across the actual operating range while the excessive portion provides margin for environmental variations.
3Measurement precision
If the optical element undergoes temperature cycling during operation, then accurate compensation data is obtained without external facilities, but power consumption increases to maintain temperature states
Solution Approach 1:
The patent utilizes the optical element's inherent response to temperature changes during normal operation to serve dual purposes: maintaining operational functionality and simultaneously characterizing temperature characteristics for compensation. The same operational power input that drives the optical element also enables temperature cycling and measurement, eliminating the need for separate power-consuming temperature control systems.
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
Enables high-accuracy compensation of temperature characteristics in real-time, even when optical element characteristics change due to aging, maintaining measurement precision and consistent illumination across varying temperatures.
Implementation Method 1
a light receiving element which outputs an output signal corresponding to an amount of received light
Implementation Method 2
a light emitting element which outputs light having an amount corresponding to supplied power
Data Source
AI summary
Alight receiving device is equipped with a first light receiving element which outputs a first output signal corresponding to an amount of received light, a temperature information acquisition unit which acquires temperature information of the first light receiving element, a generation unit which generates compensating information of the first output signal, based on first output signals and temperature information when power is supplied to the first light receiving element in a plurality of power supply conditions and stores the same in a storage unit, and a compensation unit which compensates the first output signal, based on the temperature information and the compensating information when the first output signal is output.Thus, even when temperature characteristics of an optical element are varied, the temperature characteristics are compensated highly accurately.