Fast Switching Circuit for Light Source Brightness
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Solution Overview
Problem
Existing light source controllers are unable to quickly adjust brightness due to the long time required for digital-to-analog conversion and communication, which fails to keep up with the fast photographing speed of cameras in machine vision applications.
Innovation Solution
A fast switching circuit for light source brightness is introduced, comprising a communication module, a master control module, a digital-to-analog conversion module, a multi-channel current buffer module, a constant current adjustment module, and a light source module, which allows for direct hardware switching and significantly reduces the time required for brightness adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a digital-to-analog conversion chip is used to adjust light source brightness, then the brightness can be controlled, but the switching time becomes too long to keep up with camera photographing speed
Solution Approach 1:
The patent pre-stores multiple brightness current values in the master control module before actual switching is needed. When brightness adjustment is required, the system retrieves the pre-stored current value directly from memory rather than performing real-time digital-to-analog conversion, significantly reducing the switching time and enabling the light source to keep up with camera photographing speeds.
Solution Approach 2:
The patent replaces the traditional digital-to-analog conversion process with a direct current value output mechanism. Instead of converting digital signals to analog through a chip that requires master control timing, the system directly outputs pre-converted current values from the multi-channel current buffer module, eliminating the time-consuming conversion process while maintaining brightness control capability.
2Speed
If digital-to-analog conversion is performed for each brightness adjustment, then brightness control is achieved, but the stroboscopic speed cannot keep up with photographing speed
Solution Approach 1:
The master control module pre-stores multiple brightness current values corresponding to different brightness levels before actual switching is needed. When brightness adjustment is required, the system retrieves the pre-stored current value directly from memory rather than performing real-time digital-to-analog conversion, significantly reducing the switching time and enabling the light source to keep up with camera photographing speeds.
Solution Approach 2:
The patent introduces a multi-channel current buffer module as an intermediary between the master control module and the light source. This buffer module stores and rapidly outputs pre-converted current values, acting as a mediator that bridges the gap between control signals and light output, enabling fast brightness switching without real-time conversion.
Data Source
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AI summary
Provided is a fast switching circuit for light source brightness. The fast switching circuit for light source brightness includes a communication module, a master control module, a digital-to-analog conversion module, a multi-channel current buffer module, a constant current adjustment module and a light source module. The communication module is connected to the master control module. The digital-to-analog conversion module is connected to the master control module and the multi-channel current buffer module. The multi-channel current buffer module is connected to the master control module and the constant current adjustment module. The constant current adjustment module is connected to the light source module. In the present disclosure, current values corresponding to multiple brightness values are buffered so that direct hardware switching can be enabled when needed, thereby greatly reducing the time required for light source brightness switching, greatly increasing the stroboscopic speed of a light source controller and having a relatively high market promotion value.