Display Luminance Adjustment via Ambient and Image Signal Analysis
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Solution Overview
Problem
Existing display devices face challenges in balancing image quality and power consumption when adjusting luminance based on ambient and image signal luminance, often resulting in inadequate display quality or excessive power usage.
Innovation Solution
A display device comprising a light sensor, light information determining unit, image analysis unit, luminance determining unit, and control unit that calculates and adjusts luminance based on ambient and image signal luminance, using equations to determine final luminance values and adjust the display screen accordingly, allowing for power saving and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the luminance of the display screen is adjusted according to ambient luminance to reduce power consumption, then power consumption is decreased, but image quality deteriorates (low luminance images become too dark to be recognized)
Solution Approach 1:
The system uses a light sensor to detect ambient luminance and feeds this information back to the control unit, which then adjusts the display luminance accordingly. This closed-loop feedback mechanism enables automatic adaptation to environmental conditions, optimizing the balance between power consumption and image quality without manual intervention.
Solution Approach 2:
The display device dynamically adjusts its luminance characteristics based on real-time ambient light conditions and image signal analysis. The system transitions from static luminance settings to dynamic adjustment, allowing the display to adapt its brightness and contrast properties according to the specific viewing environment and content being displayed.
2Use of energy by stationary object
If the luminance of high luminance images is decreased in low luminance places to reduce power consumption, then power consumption is decreased, but image quality deteriorates (low luminance images become too dark to be recognized)
Solution Approach 1:
The system applies different luminance adjustment strategies to different regions or types of content on the display. By analyzing the image signal to determine whether content is high or low luminance, the system can apply localized adjustments that preserve the recognizability of low luminance images while still reducing overall power consumption through selective dimming of high luminance areas.
Solution Approach 2:
The system changes multiple display parameters simultaneously, including luminance, contrast, and brightness, based on ambient light conditions and image content analysis. Rather than simply reducing overall luminance, the system adjusts multiple parameters to maintain image quality while achieving power savings, particularly by preserving the visibility of low luminance content.
3Reliability
If the luminance of the display screen is adjusted to achieve better image quality, then image quality is improved, but power consumption increases
Solution Approach 1:
The system applies partial adjustment rather than full luminance reduction or increase. By analyzing ambient light conditions and image content, the system determines the optimal degree of luminance adjustment needed to achieve acceptable image quality, avoiding excessive luminance increases that would unnecessarily consume power while still maintaining sufficient visibility and quality.
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 balances power consumption and image quality by dynamically adjusting the display screen's luminance according to ambient and image signal conditions, enhancing user experience and reducing energy usage.
Implementation Method 1
a light sensor, installed near the display screen for detecting the ambient luminance
Data Source
AI summary
A display device for receiving and displaying an image signal is disclosed. The display device comprises a display screen, a light sensor, a light information determining unit, an image analysis unit, a luminance determining unit, and a control unit. The light sensor is installed near the display screen for detecting an ambient luminance level. The light information determining unit is utilized for determining a first luminance adjusting value according to the ambient luminance. The image analysis unit is utilized for analyzing the image signal to obtain a color level value. The luminance determining unit is utilized for calculating a second luminance adjusting value according to the color level value, and for determining a final luminance adjusting value according to the first luminance adjusting value and the second luminance adjusting value. The control unit is utilized for adjusting the luminance of the display screen according to the final luminance adjusting value.