External Flash Color Correction Feedback for Aging LED Parameters
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Solution Overview
Problem
External flashes in mobile terminals often experience deviations in chroma and light-emission intensity due to long-term use, leading to discrepancies between actual and preset light-emission parameters, which affects the desired light filling effect in photography.
Innovation Solution
A color correction processing apparatus and system that includes a first communication circuit to receive digital quantity data of light-emission information, a color correction processing circuit to process this data, and a second communication circuit to transmit correction results to the external flash, ensuring accurate light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If LED lamp beads in external flash are used for long-term use, then the external flash can provide continuous lighting assistance, but deviations in chroma and light-emission intensity occur, causing actual light-emission parameters to diverge from preset parameters
Solution Approach 1:
The patent implements a feedback mechanism where light-emission parameters are detected during use, and correction values are generated and applied to adjust the LED lamp beads. The detection module measures actual light-emission parameters, compares them with preset values, and the processing module generates correction values that are fed back to the control module to adjust the driving current, thereby maintaining parameter accuracy over extended usage periods.
Solution Approach 2:
The patent changes the electrical parameters (driving current, pulse width modulation duty cycle) of the LED lamp beads dynamically based on detected light-emission deviations. By adjusting these parameters in real-time or periodic intervals, the system compensates for aging effects and maintains consistent chroma and intensity output despite long-term operation.
2Duration of action of stationary object
If light-emission parameters of external flash deviate from preset values, then long-term usage is achieved, but the expected light filling effect cannot be realized in photography
Solution Approach 1:
The feedback loop continuously monitors light-emission parameters and adjusts them to maintain the expected light filling effect. The detection module measures actual chroma and intensity, the processing module compares with preset values required for proper light filling, and the control module adjusts driving parameters to ensure consistent photographic results over time.
Solution Approach 2:
The external flash system performs self-diagnosis and self-correction of its light-emission parameters. The detection and processing modules automatically identify deviations and generate correction values without external intervention, enabling the flash to maintain reliable light filling effects throughout its service life.
3Device complexity
If no correction mechanism is implemented, then device complexity is reduced, but light-emission parameters cannot be maintained at preset values over time
Solution Approach 1:
The external flash incorporates a self-service correction system where the device automatically detects its own light-emission parameter deviations and applies corrections without external assistance. The integrated detection, processing, and control modules work together to maintain parameter accuracy, making the correction mechanism compact and self-contained rather than requiring complex external calibration equipment.
Data Source
AI summary
A color correction processing apparatus comprises a first communication circuit, a color correction processing circuit and a second communication circuit, wherein the first communication circuit is used for receiving digital quantity data of light-emission information of an external flash; the color correction processing circuit is electrically connected to the first communication circuit, so as to receive the digital quantity data of the light-emission information by means of the first communication circuit, and carries out color correction processing according to the digital quantity data of the light-emission information to generate color correction result information; and the second communication circuit is used for electrically connecting to the external flash, and the second communication circuit transmits the color correction result information to the external flash, so as to correct light emission of the external flash.