Display Brightness Adaptation via Ambient Light Segmentation
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Solution Overview
Problem
Display apparatuses struggle to accurately detect ambient brightness due to the inability to distinguish between light sources, leading to noise data interference and potential malfunctions when adjusting screen brightness based on environmental conditions.
Innovation Solution
The display apparatus employs an optical sensor and a processor to differentiate between illumination levels when an image is displayed and when no image is displayed, using stored tables to identify ambient brightness by excluding noise components caused by screen brightness, allowing for precise adjustments based on detected illumination values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical sensor detects ambient brightness to enable automatic screen brightness adjustment, then the display apparatus can adapt to environmental conditions, but the sensor cannot distinguish between ambient light and screen light causing noise data and potential malfunctions
Solution Approach 1:
The patent segments the brightness detection process into two distinct phases: screen-off detection for ambient brightness measurement and screen-on detection for content brightness measurement. This temporal segmentation allows the sensor to exclusively measure ambient light when the screen is off, eliminating contamination from screen light, while still enabling automatic brightness adjustment when the screen is on.
Solution Approach 2:
The patent performs preliminary ambient brightness detection during screen-off periods before content display begins. By pre-measuring the ambient light conditions when no screen light is present, the system establishes a baseline ambient brightness value that can be used for subsequent brightness adjustments during content display, ensuring accurate measurements are obtained in advance.
2Speed
If the sensor continuously detects illumination values to monitor ambient conditions, then real-time brightness adjustment is possible, but noise data from screen light contaminates the ambient brightness measurement
Solution Approach 1:
The patent implements periodic switching between screen-off and screen-on states to enable alternating ambient brightness detection and content display. During each screen-off period, the sensor performs ambient brightness measurement, and during screen-on periods, content is displayed. This periodic action ensures that ambient brightness data is continuously updated without contamination from screen light, maintaining both responsiveness and reliability.
Solution Approach 2:
The patent maintains continuous ambient brightness monitoring by utilizing every screen-off period for detection, ensuring that the ambient brightness value is always current and up-to-date. This continuous measurement approach during available opportunities ensures that when content display begins, the system immediately has accurate ambient brightness data for optimal brightness adjustment.
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 enables accurate determination of ambient brightness, reducing noise interference and ensuring correct operation of the display apparatus by isolating ambient light levels from screen light levels, thereby improving the reliability of brightness adjustments.
Implementation Method 1
an optical sensor... obtain a current illumination value detected by the optical sensor
Data Source
AI summary
A display apparatus includes a display; an optical sensor; and a processor configured to: obtain a current illumination value detected by the optical sensor while the display displays an image, identify a first illumination level corresponding to the obtained current illumination value, the first illumination level being previously obtained at a time when the display is displaying a preset image, identify an ambient brightness based on a second illumination level, the second illumination level corresponding to the identified first illumination level and being previously obtained at a time when the display is not displaying any image, and perform an operation based on the identified ambient brightness.