Display Brightness Control via Ambient Illuminance Feedback
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Solution Overview
Problem
Flat panel displays, such as those in mobile devices, face reduced image visibility in bright ambient conditions, limiting their mobility and usability outdoors due to insufficient brightness adjustment.
Innovation Solution
An image processing device with an image determining unit, legibility improving unit, illuminance sensor, and brightness improving unit that classifies images into moving pictures, photographs, and user interfaces, extracts specific pixels, modifies gray scale values, and corrects gamma curves based on external illuminance to enhance legibility and brightness, ensuring improved visibility in varying light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display screen brightness is increased to improve visibility in bright ambient conditions, then outdoor visibility is improved, but power consumption increases
Solution Approach 1:
The display device dynamically adjusts brightness based on real-time ambient illuminance detection. The control unit receives illuminance information from the illuminance sensor and automatically modifies display brightness parameters, enabling the system to adapt to varying light conditions without manual intervention and optimizing power consumption according to actual viewing needs.
Solution Approach 2:
The system implements a feedback mechanism where the illuminance sensor continuously monitors ambient light conditions and feeds this information back to the control unit. The control unit processes this feedback and adjusts the display brightness accordingly, creating a closed-loop control system that optimizes visibility while minimizing power consumption based on actual environmental conditions.
2Illumination intensity
If the display screen brightness is increased to maintain visibility in high illuminance environments, then outdoor visibility is improved, but battery life decreases
Solution Approach 1:
The display device dynamically adjusts brightness based on real-time ambient illuminance detection. The control unit receives illuminance information from the illuminance sensor and automatically modifies display brightness parameters, enabling the system to adapt to varying light conditions without manual intervention and optimizing power consumption according to actual viewing needs.
Solution Approach 2:
The system changes the brightness parameter dynamically based on ambient illuminance conditions. The control unit modifies display parameters such as backlight intensity and gamma correction values according to the detected light environment, allowing the display to maintain optimal visibility across different lighting conditions while minimizing unnecessary power consumption that would reduce battery life.
3Illumination intensity
If gamma curve correction is applied to improve brightness in bright environments, then visibility is improved, but image quality may deteriorate in dark environments
Solution Approach 1:
The display device dynamically adjusts brightness based on real-time ambient illuminance detection. The control unit receives illuminance information from the illuminance sensor and automatically modifies display brightness parameters, enabling the system to adapt to varying light conditions without manual intervention and optimizing power consumption according to actual viewing needs.
Solution Approach 2:
The system changes the brightness parameter dynamically based on ambient illuminance conditions. The control unit modifies display parameters such as backlight intensity and gamma correction values according to the detected light environment, allowing the display to maintain optimal visibility across different lighting conditions while minimizing unnecessary power consumption that would reduce battery life.
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
The solution effectively increases outdoor image visibility by dynamically adjusting brightness and contrast, maintaining clear image display even in high illuminance environments, thereby enhancing the mobility and usability of mobile devices.
Implementation Method 1
an illuminance sensor for sensing external illuminance
Implementation Method 2
organic light emitting display devices (OLED)
Data Source
AI summary
An image processing device, an image processing method, and a flat panel display are disclosed. According to some aspects, the image processing device may include: an image determining unit for determining a kind of an input image as one of a moving picture, a photograph image, and a user interface image. A legibility improving unit may be configured to generate a legibility improved image by extracting specific pixels from input image according to the kind of the input image and by modifying gray scale values of the extracted specific pixels. According to some aspects, an illuminance sensor for sensing external illuminance, and a brightness improving unit for correcting a gamma curve according to the illuminance sensor is provided. Brightness may be controlled to increase outdoor visibility of an image according to the external illuminance.