Terminal Brightness Control Using Proximity Sensor Intermediary
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Solution Overview
Problem
Mobile terminals face brightness control errors due to user interference with illumination sensors, leading to unsuitable screen brightness in varying environments.
Innovation Solution
Incorporating both an illumination sensor for measuring peripheral light and a proximity sensor to detect objects within a preset distance, along with a memory for storing brightness data, allowing the controller to adjust the display unit's brightness based on measured illumination and object presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic brightness control using illumination sensor is implemented, then screen brightness adapts to peripheral environment, but brightness control error occurs when user covers the sensor
Solution Approach 1:
The patent introduces a proximity sensor as an intermediary device to detect whether the user is near the terminal. This mediator provides additional information that helps the controller distinguish between genuine environmental darkness and user-caused sensor blocking, thereby resolving the brightness control accuracy issue while maintaining environmental adaptability
Solution Approach 2:
The system uses feedback from the proximity sensor to adjust the brightness control decision-making process. When the proximity sensor detects the user is nearby, the system overrides the illumination sensor's signal, creating a feedback loop that prevents incorrect brightness adjustment and eliminates the harmful effect of sensor blocking
2Ease of manufacture
If integral sensor combining proximity and illumination sensors is used, then cost is reduced, but brightness control error due to user covering sensor increases
Solution Approach 1:
The patent makes the proximity sensor serve multiple functions: it not only detects proximity for its primary function but also acts as a guard against illumination sensor blocking. This multi-functionality allows the system to maintain measurement precision without adding extra sensors, thereby keeping manufacturing costs low while improving reliability
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 ensures a suitably bright screen for users while minimizing brightness control errors caused by user interference, providing effective automatic brightness adjustment.
Implementation Method 1
an illumination sensor for measuring peripheral illumination of the terminal
Implementation Method 2
a proximity sensor for detecting an object within a preset distance
Data Source
AI summary
A terminal and a brightness control method thereof are provided. The terminal includes an illumination sensor for measuring peripheral illumination of the terminal, a proximity sensor for detecting an object within a preset distance, a memory for storing a brightness table including data for controlling brightness of a display unit corresponding to the measured illumination, the display unit for displaying and for changing a brightness of the display unit under control of a controller, and the controller for controlling the display unit to change the brightness according to the measured illumination and the brightness table when the object is not detected. The terminal and brightness control method thereof provide a more suitable screen to a user.