Image Sensor Illumination Control for Real-Time Brightness Switching
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Solution Overview
Problem
Conventional image sensing devices are limited in their ability to dynamically adjust illumination brightness in real-time due to restricted exposure modes and slow switching operations, leading to decreased performance.
Innovation Solution
An image sensing device with a control device that includes a control circuit, operation circuit, and driving signal generators, which generate control and driving signals to dynamically adjust illumination brightness by varying output powers and timing, enabling real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the image sensing device uses a limited number of exposure modes with slow serial transmission interface or fast switching of limited groups, then the device structure remains simple, but the device cannot adjust exposure operation in real-time, resulting in decreased performance
Solution Approach 1:
The control device is segmented into multiple independent driving signal generators (first, second, third, and fourth driving signal generators), each capable of independently controlling different illumination groups. This segmentation allows parallel control operations, enabling real-time adjustment of exposure parameters without requiring complex centralized control, thus improving productivity while maintaining relatively simple device structure.
Solution Approach 2:
The patent implements dynamic control by allowing the image sensing device to switch between multiple exposure modes (first, second, third, and fourth exposure modes) with different illumination configurations. The control device can dynamically adjust which driving signal generators are active and how illumination groups are configured, enabling real-time adaptation to different imaging requirements without fixed limitations.
2Illumination intensity
If the image sensing device adjusts only the length of exposure time in limited modes, then the control mechanism remains simple, but the illumination brightness cannot be dynamically adjusted in real-time
Solution Approach 1:
The patent changes multiple parameters simultaneously to control illumination brightness, including exposure time length, illumination duty cycle, and the number of active driving signal generators. By varying these parameters, the system can achieve fine-grained control over illumination intensity in real-time, transforming the single-parameter control into multi-parameter control for enhanced brightness adjustment capability.
Solution Approach 2:
The control device is designed with multi-functionality, where the control circuit can perform multiple operations: generating control signals for different driving signal generators, adjusting exposure timing, and configuring illumination duty cycles. This universal control mechanism allows the same control device to handle various illumination scenarios (different brightness levels, different exposure modes) without requiring separate control mechanisms for each function.
Data Source
AI summary
An image sensing device and a control device of an illumination device thereof are provided. The control device includes a control circuit, an operation circuit, and multiple driving signal generators. The control circuit generates multiple control signals. The operation circuit performs a logical operation on the control signals and an image capturing signal to generate multiple operation results. The driving signal generator respectively provides multiple driving signals to the illumination device according to the operation results, and the driving signals respectively have multiple different output powers.