Optical Module Wiring Integration for Temperature Detection
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Solution Overview
Problem
The complexity of wiring configurations in optical modules with integrated temperature sensors leads to increased manufacturing costs and difficulty in layout, especially in small-size interference filters, due to the need for additional wiring and circuitry for temperature sensor driving.
Innovation Solution
An optical module design where the first sensor wiring of the temperature sensor is connected to the driving electrode line, allowing the application of driving voltage directly through this line, eliminating the need for a separate sensor driving terminal and voltage source, thereby simplifying the wiring configuration and reducing the number of necessary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is disposed in the interference filter, then temperature detection capability is improved, but wiring configuration becomes complicated and device complexity increases
Solution Approach 1:
The patent merges the temperature sensor wiring with the existing driving electrode line by connecting the first sensor wiring to the driving electrode line. This integration allows the same physical line to serve dual purposes: driving the electrostatic actuator and providing power to the temperature sensor, thereby eliminating the need for separate sensor driving terminals and voltage sources, and significantly simplifying the overall wiring configuration.
Solution Approach 2:
The driving electrode line is given multiple functions: it not only drives the electrostatic actuator for gap adjustment but also simultaneously serves as the power supply line for the temperature sensor. This multi-functionality reduces the number of dedicated wiring paths and components needed, addressing the complexity issue while maintaining temperature detection capability.
2Measurement precision
If a temperature sensor is disposed in a small-size interference filter, then temperature detection is enabled, but layout of wirings becomes difficult and manufacturing complexity increases
Solution Approach 1:
By combining the temperature sensor power supply with the driving electrode line, the patent eliminates the need for separate sensor driving terminals and dedicated wiring paths. This merging approach significantly eases the layout process in small-size interference filters where space is constrained, as the same wiring infrastructure serves dual purposes.
Solution Approach 2:
The driving electrode line performs multiple functions including actuator driving and temperature sensor power supply, reducing the total number of wiring elements that need to be laid out. This multi-functionality is particularly beneficial in compact designs where minimizing wiring complexity is critical for manufacturability.
3Measurement precision
If separate driving circuits for temperature sensor are added, then temperature detection function is improved, but wiring configuration and device complexity increase
Solution Approach 1:
The patent merges the temperature sensor driving function into the existing electrostatic actuator driving circuit by connecting the first sensor wiring to the driving electrode line. This eliminates the need for separate sensor driving circuits and voltage sources, significantly reducing device complexity while maintaining full temperature detection functionality.
Solution Approach 2:
The driving electrode line is designed to serve multiple functions: it drives the electrostatic actuator for wavelength tuning and simultaneously provides the driving voltage for the temperature sensor. This multi-functionality approach avoids adding separate circuitry, thereby reducing overall device complexity while achieving the temperature 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
This configuration simplifies the wiring and circuitry of the optical module, reducing manufacturing costs and enabling precise temperature detection for accurate wavelength transmission from the tunable interference filter.
Implementation Method 1
by controlling a voltage applied to an electrostatic actuator disposed between one pair of substrates, the movable portion is displaced by an electrostatic attractive force
Implementation Method 2
a temperature sensor that detects temperature of the tunable interference filter
Implementation Method 3
light of a predetermined wavelength out of incident light that is strengthened through multiple interferences of the one pair of reflective films is transmitted
Data Source
AI summary
An optical module comprising a tunable interference filter including a first substrate, a second substrate facing the first substrate, a first reflective film formed on the first substrate, a second reflective film formed on the second substrate and facing the first reflective film, a gap changing unit changing a gap between the first reflective film and the second reflective film, and a driving electrode line electrically connected to the gap changing unit, a temperature sensor detecting temperature of the tunable interference filter and including a first sensor wiring and a second sensor wiring, the first sensor wiring being electrically connected to the driving electrode line, a switch electrically connected to the second sensor wiring, and a temperature detecting circuit electrically connected to the switch.