Under-screen camera luminance control for image quality
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Solution Overview
Problem
Images captured by under-screen cameras are distorted due to light reflection from the screen substrate, which is exacerbated when the screen is turned on, causing unwanted light interference.
Innovation Solution
The shooting control method adjusts the luminance value of the screen area corresponding to the under-screen camera before and after capturing an image, reducing light interference by lowering the luminance during capture and restoring it for display purposes, ensuring both image quality and screen display effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the screen is turned on to provide display function, then the display effectiveness is improved, but light reflected by the screen substrate interferes with the under-screen camera causing image distortion
Solution Approach 1:
The patent implements periodic switching between display mode and photography mode. During photography mode, the screen is turned off or dimmed to eliminate light interference with the under-screen camera. During display mode, the screen returns to normal brightness. This periodic action resolves the contradiction by separating the two functions in time rather than space.
Solution Approach 2:
The patent dynamically adjusts the screen luminance based on the operational state. When the camera needs to capture images, the screen luminance is reduced or turned off. When display is needed, the luminance is restored. This dynamic adjustment allows the system to adapt to different functional requirements and eliminate the fixed contradiction.
2Manufacturing precision
If the screen luminance is reduced to prevent light interference, then image quality is improved, but display effectiveness deteriorates
Solution Approach 1:
The system periodically switches between high luminance for display and low luminance for photography. During photography intervals, luminance is reduced to improve image quality. During display intervals, luminance is restored to maintain display effectiveness. This temporal separation allows both requirements to be met at different times.
Solution Approach 2:
Before capturing an image, the system preliminarily reduces the screen luminance to prevent light interference. After image capture is complete, the luminance is restored. This preliminary action ensures image quality is not compromised while maintaining normal display effectiveness for the majority of time.
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 method prevents light from the screen from affecting the image captured by the under-screen camera, maintaining image quality while ensuring a desirable display effect, thus addressing the distortion issue and enhancing user experience.
Implementation Method 1
light emitted by a light-emitting layer of the screen may be reflected to the under-screen camera by a substrate
Implementation Method 2
light emitted by a light-emitting layer of the screen may be reflected to the under-screen camera by a substrate
Data Source
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Figure 3~4(b)
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AI summary
The embodiments of the present invention provide a shooting control method and an electronic device. The solution includes: within a first duration of each working cycle of a capturing process, adjusting a luminance value of a first screen area of the electronic device from a target luminance value to a preset luminance value that is less than the target luminance value, and controlling an under-screen camera of the electronic device to capture an image, where each working cycle includes a first duration and a second duration; and within a second duration after each first duration in the capturing process, controlling the under-screen camera of the electronic device to suspend capturing an image, and adjusting the luminance value of the first screen area from the preset luminance value to the target luminance value. The first screen area includes an area that is on the screen of the electronic device and that corresponds to a position where the under-screen camera is located below the screen.