Camera Light-Supplementing Lamp Mixed Wavelength PWM Control
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Solution Overview
Problem
Current camera light-supplementing technologies, using either infrared or white light, suffer from poor color contrast and visibility issues, particularly in low-illumination environments, which hampers intelligent image recognition and poses safety hazards in monitoring scenarios like road monitoring.
Innovation Solution
The implementation of a camera with a light-supplementing lamp that emits mixed light rays with different wavelengths, controlled by PWM signals to adjust brightness according to environmental conditions, enhancing the light-supplementing effect and monitoring quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If infrared light is used to supplement light, then the light-supplementing effect is improved, but the color contrast of the image deteriorates
Solution Approach 1:
The patent combines infrared light-emitting chips and visible light-emitting chips into a single light-supplementing lamp assembly. The infrared chips provide illumination for night vision while the visible light chips (red, green, blue) supplement color information, merging the benefits of both light types to resolve the contradiction between illumination effect and color contrast.
Solution Approach 2:
The light-supplementing lamp uses a composite structure with multiple types of light-emitting chips (infrared and visible light) that work together. This composite approach allows the system to achieve both strong illumination effect and good color contrast by utilizing the complementary properties of different light wavelengths.
2Loss of information
If white light is used to supplement light, then the color contrast of the image is improved, but the concealment and safety deteriorate
Solution Approach 1:
The system dynamically adjusts the working states of different light-emitting chips based on environmental conditions. In dark environments, the infrared chips are activated for concealed operation, while visible light chips are adjusted or turned off to maintain safety and concealment, yet color contrast is preserved when needed.
Solution Approach 2:
Different regions of the light-supplementing lamp have different functions: infrared chips are positioned and controlled to provide concealed illumination, while visible light chips are selectively activated to provide color information only when necessary, creating local quality differences that balance concealment and color contrast requirements.
3Device complexity
If a single type of light-supplementing lamp is used, then the device complexity is reduced, but the adaptability to different monitoring requirements deteriorates
Solution Approach 1:
The light-supplementing lamp is designed as a universal device that can perform multiple functions: infrared illumination, visible light supplementation, and adaptive color control. By integrating different types of light-emitting chips into a single lamp assembly, the system achieves multi-functionality without significantly increasing device complexity, thereby improving adaptability to different monitoring requirements.
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 approach improves the light-supplementing effect and monitoring quality by using mixed wavelengths, enabling better contrast and satisfying the requirements for intelligent recognition while minimizing visibility and safety hazards.
Implementation Method 1
a light-supplementing lamp, comprising at least two light-emitting chips, and each light-emitting chip is respectively connected to an output port of a corresponding driving module, wherein the light-emitting chips are configured for emitting light-supplementing rays
Data Source
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AI summary
Provided in an embodiment of the present application is a camera. The camera comprises: a light-supplementing lamp which is provided with at least two light-emitting chips and configured for emitting at least two light-supplementing rays having different wavelengths, wherein each light-emitting chip is configured for connecting to a corresponding driving module which is configured for receiving PWM signals sent by a processor chip; a memory configured for storing a correspondence between a preset brightness value and at least two PWM signals; and the processor chip that is configured for: acquiring a current image from an image sensor and calculating an actual brightness value of the current image; determining at least two new PWM signals corresponding to a first preset brightness value (a brightness value in a data table corresponding to the actual brightness value) by means of the data table; and outputting the at least two new PWM signals to the driving modules to drive the light-supplementing lamp to emit the light-supplementing rays. The camera in the embodiment of the present application uses mixed light supplementation to improve the light-supplementing effect of the camera.