OLED Display Luminance Control Under Power Consumption Limits
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Solution Overview
Problem
As display resolution and peak luminance increase, power consumption in image display apparatuses rises, leading to power consumption deviations in organic light emitting panels, which can result in luminance loss if indiscriminate power reduction methods are applied.
Innovation Solution
An image display apparatus that calculates luminance levels based on average picture levels and detected current information, adjusting offset levels to maintain luminance while adhering to power consumption regulations, considering panel deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If display resolution or peak luminance is increased, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic luminance adjustment by continuously monitoring APL values and adapting the display luminance level in real-time based on the actual image content being displayed. This dynamic adaptation allows the display to operate at lower luminance levels when appropriate, reducing power consumption while maintaining image quality when needed.
Solution Approach 2:
The patent changes the operating parameters of the display by adjusting luminance levels based on APL calculations. By modifying the luminance parameter dynamically according to image characteristics, the system achieves lower power consumption while preserving essential display quality.
2Use of energy by moving object
If power consumption is reduced indiscriminately, then power consumption regulations are met, but luminance is lost
Solution Approach 1:
The patent implements a feedback mechanism by continuously calculating APL values from the displayed image content and using this information to adjust luminance levels. This closed-loop control ensures that power consumption is reduced only when appropriate, preventing luminance loss while still meeting power consumption regulations.
Solution Approach 2:
The patent applies different luminance adjustment strategies based on local image characteristics represented by APL values. Different regions or types of image content receive differentiated treatment, with luminance reduced only when the image content allows, thereby maintaining overall display quality while reducing power consumption.
3Device complexity
If signal processing is performed without considering panel deviations, then processing complexity is reduced, but luminance uniformity deteriorates
Solution Approach 1:
The patent enables the display system to self-adjust by using APL calculations to automatically compensate for panel deviations. The system monitors its own performance characteristics and makes real-time adjustments without requiring complex external calibration or processing, thereby maintaining luminance uniformity with minimal additional complexity.
Data Source
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AI summary
The image display apparatus according to an embodiment of the present disclosure comprises: an organic light emitting panel; a signal processing device to perform signal processing on an input image and output an image signal; a timing controller to drive the organic light emitting panel based on the image signal; and a power supply to supply a display driving voltage, wherein the signal processing device is configured to calculate a luminance level based on the average picture level of the input image, calculate output luminance level based on the luminance level and an offset level corresponding to current information detected in response to the display driving voltage in the timing controller, and output an image signal corresponding to the output luminance level. Accordingly, it is possible to improve the luminance of the display while satisfying regulation on power consumption.