Composite Flash Module for Ambient Color Matching
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Solution Overview
Problem
Mobile devices equipped with flashes face challenges in matching the color spectrum of their flash light to varying ambient lighting conditions, leading to color balance issues in captured images.
Innovation Solution
Incorporating a combination of white and red light sources within a flash module, where the intensity of the red light is adjusted to match the ambient light spectrum, using sensors and processing modules to determine the necessary intensity for optimal color balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single white light source is used in the flash module, then the device structure remains simple, but the color spectrum cannot be adjusted to match varying ambient lighting conditions
Solution Approach 1:
The flash module is segmented into multiple independent light sources: a white light source and a red light source. Each light source can be controlled independently to adjust the overall color spectrum. This segmentation allows the flash to adapt to different ambient lighting conditions by varying the intensity ratio between the white and red light sources, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The flash module uses a composite light source system combining white light (from LEDs or xenon) and red light (from LEDs). This composite approach creates a flexible color spectrum that can be adjusted by controlling the intensity of each component light source independently, enabling adaptation to various ambient lighting conditions while maintaining a relatively compact structure.
2Measurement precision
If multiple light sources with different colors are combined in the flash module, then the color spectrum can be adjusted to match ambient light, but the device complexity increases
Solution Approach 1:
Different regions of the flash module are assigned different light sources with specific color characteristics. The white light source provides the base illumination, while the red light source provides color adjustment capability. This local quality differentiation allows precise control over the overall color output to match ambient lighting conditions, achieving high color accuracy without requiring a completely complex reconfiguration of the entire flash system.
Solution Approach 2:
The system adjusts the intensity parameters of individual light sources (white and red) independently to achieve the desired color spectrum. By changing the intensity ratio between these light sources based on detected ambient light conditions, the system achieves precise color matching while keeping the hardware structure relatively simple and manageable.
3Ease of operation
If the flash uses a fixed color spectrum, then the device structure remains simple, but color balance issues occur under different ambient lighting conditions
Solution Approach 1:
The flash system incorporates sensors that detect ambient lighting conditions and provide feedback to the control module. Based on this feedback, the control module automatically adjusts the intensity ratios of the white and red light sources to match the ambient color temperature. This feedback mechanism enables automatic color balancing, improving ease of operation while the added control complexity is justified by the significant improvement in image quality across different lighting conditions.
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
The solution effectively approximates the ambient light color spectrum, improving color accuracy in images captured under different lighting conditions, ensuring more natural and realistic color representation.
Implementation Method 1
the flash can include a white light source and a red light source
Data Source
AI summary
An apparatus and method for capturing an image on an electronic device having a flash comprising a first light source and a second light source is presented herein. A detection of a color spectrum of ambient light is made using image data sensed by an image sensor of a camera module. Additionally, a determination of an intensity of a first light when combined with an associated intensity of a second light results in a color spectrum that substantially matches the color spectrum of the ambient light. The flash emits a first light from the first light source of the flash and second light from the second light source of the flash. An image from a camera module is recorded during the emission of the first and second light.