Mobile Display as Flash Light Source for Color Temperature Compensation
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Solution Overview
Problem
Mobile devices without a dedicated flash light source face challenges in capturing images in dark environments, as they lack an effective illumination solution.
Innovation Solution
Utilizing the mobile device's display as a flash light source by generating and displaying flash data with a color temperature that compensates for the external color temperature, allowing the display to serve as a makeshift flash unit for capturing images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a dedicated flash light source is added to the mobile device, then illumination capability for image capture in dark environments is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The display device is designed to perform multiple functions: it serves as both the visual output interface for displaying scene data and as a flash light source for illuminating the subject during image capture. By controlling the display to show flash data with appropriate color temperature compensation, the same component provides illumination without requiring a separate flash device, thereby reducing device complexity while maintaining illumination capability
Solution Approach 2:
The functions of the display and flash light source are merged into a single component. The display device is controlled to display flash data that emits light with color temperature compensating for external conditions, combining the illumination function with the existing display hardware. This eliminates the need for a separate flash device and reduces overall device complexity
2Illumination intensity
If a dedicated flash light source is added to the mobile device, then illumination capability for image capture in dark environments is improved, but manufacturing cost increases
Solution Approach 1:
The display device is designed to perform multiple functions: it serves as both the visual output interface for displaying scene data and as a flash light source for illuminating the subject during image capture. By controlling the display to show flash data with appropriate color temperature compensation, the same component provides illumination without requiring a separate flash device, thereby reducing device complexity while maintaining illumination capability
Solution Approach 2:
The functions of the display and flash light source are merged into a single component. The display device is controlled to display flash data that emits light with color temperature compensating for external conditions, combining the illumination function with the existing display hardware. This eliminates the need for a separate flash device and reduces overall device complexity
3Illumination intensity
If the display is used to display both scene data and flash data simultaneously, then illumination capability is improved, but image capture quality may deteriorate due to color temperature interference
Solution Approach 1:
The system measures the external color temperature and dynamically adjusts the color temperature of the flash data displayed on the screen to compensate for external lighting conditions. This parameter adjustment ensures that the flash illumination maintains accurate color rendering despite varying environmental light conditions, preserving image capture quality while providing effective illumination
Solution Approach 2:
The system measures external color temperature conditions and uses this feedback information to adjust the color temperature of the flash data displayed on the screen. This closed-loop control ensures that the flash illumination compensates for external lighting conditions, maintaining accurate color rendering and image quality while providing necessary illumination in dark environments
Data Source
AI summary
A method of operating a mobile device and mobile systems are provided. The method includes detecting a first event through an interface of the mobile device, displaying scene data that is generated by a camera of the mobile device on a display of the mobile device, in response to the detecting first event, detecting a second event through the interface, and measuring an external color temperature in response to the detecting the second event. The method further includes generating flash data having a color temperature for compensating the external color temperature, displaying the flash data on the display, and capturing a scene using the camera.