Camera-Based Brightness Analysis for Ambient Light Detection
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Solution Overview
Problem
Existing user devices require a light sensor to adjust display brightness based on ambient lighting, which imposes design constraints and consumes hardware and computing resources.
Innovation Solution
A user device uses a brightness analysis model to determine the brightness of image portions, allowing it to set the display brightness without a light sensor by analyzing images captured by its camera, eliminating the need for ambient light measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a light sensor is used to adjust display brightness based on ambient lighting, then display brightness can be adjusted according to ambient lighting conditions, but hardware resources are consumed and device design is constrained
Solution Approach 1:
The patent extracts the ambient light measurement function from a dedicated light sensor and relocates it to the camera system. The camera, which already exists for other purposes, is utilized to capture images that contain ambient lighting information, thereby eliminating the need for a separate light sensor component while maintaining the brightness adjustment capability
Solution Approach 2:
The camera is given a dual function: its original imaging purpose plus the new function of measuring ambient lighting conditions. By analyzing images captured by the camera, the system can determine ambient brightness levels and adjust display settings, allowing one component to serve multiple purposes and reducing overall device complexity
2Measurement precision
If a light sensor is used to measure ambient lighting, then ambient light measurement is accurate, but hardware and computing resources are consumed
Solution Approach 1:
The camera system performs self-service by using its existing imaging capability to simultaneously accomplish both image capture and ambient light measurement. The same image data is processed to extract brightness information, eliminating the need for separate measurement hardware and reducing overall computational overhead compared to dedicated sensor processing
3Adaptability or versatility
If a light sensor is included in the user device, then display brightness can be adjusted based on ambient lighting, but device design is constrained
Solution Approach 1:
The patent removes the requirement for a dedicated light sensor from the device bill of materials and design specifications. By extracting the ambient light measurement function to the camera system, manufacturers gain design flexibility and can produce devices with fewer components, simplifying both the design process and manufacturing assembly
Solution Approach 2:
The ambient light measurement function is merged with the camera system's existing image processing pipeline. This consolidation eliminates the need for separate component integration and allows for a more streamlined device architecture, making the device easier to manufacture while maintaining adaptability for brightness adjustment
Data Source
AI summary
In some aspects, a user device may receive, from a camera of the user device, an image of a physical environment of the camera. The user device may determine, using a brightness analysis model, a first brightness associated with a first portion of the image that depicts an object. The user device may determine, using the brightness analysis model, a second brightness associated with a second portion of the image that is separate from the first portion. The user device may set, based at least in part on the first brightness and the second brightness, a brightness level of a display of the user device. Numerous other aspects are described.