External Flash Color Correction Using Closed-Loop Light Feedback
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Solution Overview
Problem
Artificial light sources in mobile terminal devices, such as external flashes, suffer from chroma and light-emission intensity deviations over time, leading to discrepancies between actual and preset light-emission parameters, which affects the desired lighting effect in photography.
Innovation Solution
A color correction device and system that includes a light-emission information collection circuit, communication circuits, and a color correction processing circuit to collect, process, and transmit correction instructions to the external flash, ensuring accurate alignment of light-emission parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If LED lamp beads are used in external flash for long-term operation, then the device can maintain continuous lighting function, but chroma and light-emission intensity deviations occur
Solution Approach 1:
The patent implements a feedback mechanism where a light sensor detects the actual light-emission parameters of the LED lamp beads, and a processor adjusts the driving current based on the difference between actual and preset parameters. This closed-loop control system continuously monitors and corrects deviations in chroma and light-emission intensity, resolving the contradiction between long-term operation and parameter consistency.
Solution Approach 2:
The patent dynamically changes the driving current parameter of the LED lamp beads based on real-time detection results. By adjusting the current magnitude according to the detected light-emission characteristics, the system compensates for aging effects and maintains stable lighting parameters throughout extended operation.
2Manufacturing precision
If actual light-emission parameters deviate from preset parameters, then the lighting effect consistency deteriorates, but no additional correction components are added
Solution Approach 1:
The patent employs a self-service correction approach where the external flash system automatically detects its own light-emission parameters using an integrated light sensor and corrects deviations through automated processor control. The system serves itself by monitoring and adjusting its own performance without requiring external intervention or complex additional correction components.
Solution Approach 2:
By incorporating a light sensor and feedback control loop within the existing external flash structure, the patent achieves parameter correction without significantly increasing overall system complexity. The feedback mechanism uses the available light detection capability to drive automatic adjustments.
Data Source
AI summary
A color correction device comprises a light-emission information collection circuit, a first communication circuit and a color correction processing circuit, wherein the light-emission information collection circuit is used for collecting light-emission information of an external flash; the first communication circuit is used for communicating with a terminal device, so as to receive a color correction control instruction sent by the terminal device; the color correction processing circuit receives the color correction control instruction transmitted by the first communication circuit and then performs color correction processing on the basis of the light-emission information to generate color correction result information; and the color correction result information is used for being transmitted to the external flash so as to correct light-emission of the external flash. The color correction device can be used for color correction of the external flash.