Smartphone Display Brightness Adjustment Using Under-Display Light Sensor
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Solution Overview
Problem
Existing terminal devices cannot adaptively adjust screen brightness when receiving a call, leading to increased power consumption and poor user experience.
Innovation Solution
A method and terminal configuration that includes a display unit with a feature recognition area and a sensing unit underneath, capturing user feature information to adjust display brightness based on pre-set correspondence relationships, eliminating the need for additional sensors and reducing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sound sensor is added to replace the light sensor for adjusting brightness, then the terminal can adjust brightness during calls, but the terminal cost increases
Solution Approach 1:
The existing light sensor performs dual functions: it detects ambient light for brightness adjustment and detects user presence during calls. The sensor serves itself by using its existing capability to solve the call-state brightness problem without requiring additional sensors.
Solution Approach 2:
The light sensor is designed to perform multiple functions: ambient light detection for general brightness adjustment and user presence detection during call states. This multi-functionality allows the system to adapt brightness during calls using the same sensor that operates in normal conditions.
2Adaptability or versatility
If a proximity sensor is added to adjust brightness based on distance, then the terminal can adaptively adjust brightness, but the terminal structure changes and cost increases
Solution Approach 1:
The light sensor independently detects user presence by measuring changes in ambient light when the user's face approaches during a call. It processes this information directly to trigger brightness adjustment without requiring a separate proximity sensor or additional distance measurement hardware.
Solution Approach 2:
The patent replaces the mechanical/distance-based proximity sensing approach with an optical-based solution. Instead of measuring physical distance with a proximity sensor, the system uses light intensity changes detected by the existing light sensor to infer user presence and trigger brightness adjustment.
3Ease of operation
If any object close to the terminal triggers brightness adjustment, then the terminal responds to proximity, but misoperation occurs frequently
Solution Approach 1:
The system applies different processing logic to different spatial zones. When light changes are detected in the specific region near the speaker during a call, it triggers brightness adjustment. This localized detection approach distinguishes between intentional user actions (bringing face close to speaker) and incidental objects, reducing misoperation.
Solution Approach 2:
The system continuously monitors light sensor data during call states and provides feedback to the brightness control system. By analyzing the pattern, timing, and magnitude of light changes, the system can distinguish between deliberate user actions and incidental objects, adjusting brightness only when appropriate feedback patterns are detected.
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 solution effectively adjusts screen brightness without additional sensors, improving user experience by reducing power consumption and avoiding misoperations, while maintaining the original device architecture.
Implementation Method 1
the sensing unit is located under the feature recognition area and is configured to capture feature information of a user
Data Source
AI summary
Terminal and method for adjusting display brightness of terminal are provided. By disposing sensing unit and feature recognition area of display unit, when the terminal receives incoming call, as long as feature information of user is captured and compared with the feature information in brightness configuration information, if it matches, it adjusts the display brightness. Compared with the method of speech recognition, the user can adjust the screen brightness as long as the user approaches specific part to captures features without the need for the user to input additional speech, effectively improving the user's sensory experience. At the same time, the sensing unit of the present invention is directly disposed below the display unit, and no additional sensor (such as distance sensor) is needed to effectively reduce the overall thickness of the mobile device, so that the mobile device is thinner, and meets market demands.