Strobe Lighting Unit Xenon Degradation Detection
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Solution Overview
Problem
Conventional strobe light units with detecting circuits for xenon light sources often miss degradation detection due to variations in light emission from multiple xenon discharge tubes and require a photo detector, which complicates integration into small devices like smartphones and decreases detection accuracy.
Innovation Solution
A strobe lighting unit with a simple structure that includes a xenon discharge tube, a lighting circuit, a switching element, a timing generator, a light-detecting circuit, and a logical multiply circuit, which monitors degradation by detecting the falling edge of the anode electrode without a photo detector, allowing for reliable detection of non-lighting conditions in both single and multiple xenon discharge tube configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a photo detector is used to detect xenon light source degradation, then detection capability is improved, but device structure becomes complex and integration into small devices becomes difficult
Solution Approach 1:
The patent extracts the light detection function from a separate photo detector component and integrates it into the existing flash control circuitry. The control unit monitors light emission by analyzing the relationship between drive signals and actual light output, eliminating the need for a dedicated photo detector component while maintaining degradation detection capability.
Solution Approach 2:
The control unit is given multiple functions: it not only controls the flash operation but also detects light source degradation by monitoring light emission characteristics. This multi-functionality approach allows the same component to serve both control and detection purposes, reducing overall device complexity.
2Measurement precision
If a photo detector is incorporated into small devices, then detection function is achieved, but available space for other components is reduced
Solution Approach 1:
The patent merges the light detection function with the existing flash control unit, combining two separate functions (control and detection) into a single integrated component. This consolidation eliminates the need for additional space that would be required for a separate photo detector, thereby preserving valuable space in compact devices.
3Illumination intensity
If multiple xenon discharge tubes are used to increase light output, then illumination intensity is improved, but detection accuracy decreases due to variations in light emission from individual tubes
Solution Approach 1:
The control unit implements a feedback mechanism that monitors the actual light emission from multiple xenon discharge tubes and compares it against expected performance. By continuously analyzing the relationship between drive signals and light output, the system can detect degradation in individual tubes even when others are functioning normally, maintaining high detection accuracy despite variations in light emission.
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 solution enables reliable detection of xenon light source degradation without a photo detector, increasing the range of compatible devices and improving detection accuracy for various camera-equipped devices, including thin smartphones.
Implementation Method 1
a xenon discharge tube having an anode electrode and a cathode electrode
Implementation Method 2
a light-detecting circuit, an input of the light-detecting circuit connecting the anode electrode of the xenon discharge tube, and configured to generate a light-emitting signal
Data Source
AI summary
A strobe lighting unit including a detecting circuit can reliably detect degradations of a xenon light source, which can flash as a light source for devices having a shooting with camera such as a smart phone, etc. The strobe lighting unit can include at least one xenon discharge tube as the xenon light source and at least one lighting circuit to flash the xenon discharge tube. The strobe lighting unit can also include at least one light-detecting circuit to detect degradations of the xenon discharge tube without a photo detector by monitoring an anode electrode of the xenon discharge tube at a flash thereof, and can be configured to output the monitoring result into the devices. Thus, the strobe lighting unit can result in an increase in the possible range of the devices, and can be employed for various devices including a thin mobile phone, a thin smart phone, etc.