Camera-Based Display Brightness Adaptation for Visual Comfort
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Solution Overview
Problem
Current smartphones and other video terminals fail to adapt screen brightness and color temperature to the user's visual perception, leading to visual fatigue due to inaccuracies in ambient light detection and limited adjustment capabilities.
Innovation Solution
An information terminal equipped with a camera, photo capturing unit, and display-screen display-parameter-adjustment unit that samples the background environment within the user's viewing angle range, adjusts display parameters like brightness and color temperature to match the ambient lighting state, thereby enhancing user visual comfort and health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic brightness adjustment mode is used with illumination sensor, then brightness can be adjusted according to surrounding lighting environment, but the brightness display does not match user visual perception due to detection error
Solution Approach 1:
The patent introduces a camera as an intermediary device to capture the background environment within the user's viewing angle range. The camera acts as a mediator between the display screen and the user's visual perception, providing more accurate visual information than traditional illumination sensors. The captured image is then processed to determine display parameters that match user perception.
Solution Approach 2:
The patent transitions from one-dimensional illumination sensing to two-dimensional image capture by using a camera. This dimensional change allows the system to capture not only brightness information but also color temperature and spatial distribution of light within the user's viewing angle, providing comprehensive visual environment data for more accurate display parameter adjustment.
2Adaptability or versatility
If brightness sensor is used for automatic adjustment, then brightness can be modified based on ambient light, but adjustment only for brightness is limited and does not match visual perception
Solution Approach 1:
The patent makes the display parameter adjustment system universal by enabling it to adjust multiple parameters (brightness, color temperature, contrast) simultaneously based on a single camera input. The camera captures comprehensive visual environment information that can be used to determine all necessary display parameters, making the system adaptable to various lighting conditions and user perception requirements.
Solution Approach 2:
The system implements feedback by continuously capturing the background environment through the camera, analyzing the visual information, and adjusting display parameters accordingly. This closed-loop feedback mechanism ensures that the display parameters remain matched to user visual perception under changing lighting conditions, improving visual comfort during prolonged use.
3Measurement precision
If camera is used to capture background environment within viewing angle range, then visual perception accuracy is improved, but device complexity increases
Solution Approach 1:
The patent leverages the camera's multi-functionality by using it not only for its traditional photography purpose but also as a visual environment sensor for display parameter adjustment. This approach eliminates the need for separate specialized sensors, reducing overall system complexity while maintaining high detection accuracy. The camera serves multiple functions: capturing user interface, capturing background environment, and providing data for both photography and display adaptation.
Data Source
AI summary
The embodiments of the present invention relate to an information terminal, comprising a display screen and a communication device, and also comprising a camera, a photo capturing unit, a photo gray level analysis unit and a display screen display parameter adjustment unit. The camera is used for acquiring a photo analog signal or a photo digital signal of a background environment within the viewing angle of a user, the photo capturing unit converts the photo analog signal or the photo digital signal acquired by the camera into digital photo data; the photo gray level analysis unit analyzes the gray level of the photo data, generates state parameters of the background environment within the viewing angle of the user according to configuration parameters of the camera, and sends the same to the display-screen display parameter adjustment unit; and the display screen display parameter adjustment unit adjusts the display parameters of the display screen according to the state parameters of the background environment on the basis of a preset correspondence relationship, so that the display parameters of the display screen match with the lighting state of the background environment within the viewing angle of the user.