Camera-Based Ambient Light Detection for Mobile Screen-to-Body Ratio
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Solution Overview
Problem
The installation of an ambient light sensor at the top of a mobile phone reduces the screen-to-body ratio and user experience due to the need for a non-display area to accommodate the sensor, which affects the phone's design and functionality.
Innovation Solution
Implementing a method that uses a camera with regionally divided pixels to detect ambient light, allowing for the elimination of a dedicated ambient light sensor and enabling the camera to perform both ambient light detection and photography functions independently, thereby saving top space and improving the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ambient light sensor is installed at the top of the mobile phone, then ambient light detection function is achieved, but the screen-to-body ratio is reduced
Solution Approach 1:
The camera is designed to perform multiple functions: both photography and ambient light detection. By reusing the camera module for ambient light detection instead of adding a separate sensor, the patent eliminates the need for additional top space while maintaining the ambient light detection function, thus improving screen-to-body ratio without sacrificing functionality
Solution Approach 2:
The patent merges the ambient light detection function with the existing camera module. The camera's image sensor is utilized to detect ambient light by capturing images of the display screen, combining two functions into a single component and eliminating the need for a separate ambient light sensor installation
2Measurement precision
If a separate ambient light sensor is installed, then ambient light detection accuracy is improved, but device complexity increases
Solution Approach 1:
The camera module is designed to serve dual purposes: photography and ambient light detection. This multi-functionality approach eliminates the need for additional sensors and reduces device complexity while maintaining detection accuracy through software-based image processing
Solution Approach 2:
The camera system performs ambient light detection using its own imaging capability without requiring external assistance from separate sensors. The display screen itself serves as the light source for detection, and the camera processes the captured images to determine ambient light 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
This approach allows for accurate ambient light detection without the need for a separate sensor, enhancing user experience by maintaining a higher screen-to-body ratio and enabling simultaneous photography and display adjustments based on ambient light conditions.
Implementation Method 1
obtaining, by the terminal, a first luminance value of each first pixel
Data Source
AI summary
This application relates to the field of communications technologies, and provides an ambient light detection method and a terminal, to help save top space of a mobile phone, help increase a screen-to-body ratio of the mobile phone, and help improve user experience. The method includes: obtaining, by the terminal, a first luminance value of each first pixel, where each first pixel corresponds to one first luminance value; obtaining, by the terminal, a second luminance value of each region based on first luminance values of all first pixels included in each region, where each region corresponds to one second luminance value; obtaining, by the terminal, a luminance value of current ambient light based on all the second luminance values; and adjusting, by the terminal, luminance of the display based on the luminance value of the ambient light.