OLED Peak Luminance Control via Color and Scene Analysis
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Solution Overview
Problem
Existing OLED display devices' peak luminance control methods do not effectively account for user perception, leading to unnecessary power consumption due to the lack of consideration for color and scene changes in addition to luminance information.
Innovation Solution
An OLED display device and driving method that adjust peak luminance based on both luminance information and user perception of color and scene changes, using a timing controller, gate driver, data driver, and display panel to calculate and modify peak luminance, incorporating a peak luminance controlling unit that converts image data into luminance and color difference components to adjust gamma voltages and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If peak luminance is controlled based only on average picture level, then power consumption is reduced, but user perception of color and scene changes is not reflected leading to unnecessary power consumption
Solution Approach 1:
The patent transforms the peak luminance control from using only average picture level parameter to using multiple parameters including color difference components (Cr, Cb) and scene change detection. This multi-parameter approach enables more accurate reflection of user perception while dynamically adjusting luminance, thereby reducing unnecessary power consumption without losing perceptual quality
Solution Approach 2:
The system implements feedback by detecting scene changes and color variations in the displayed image, then using this information to dynamically adjust peak luminance. The feedback loop analyzes color difference components and compares consecutive frames to determine when luminance adjustment is necessary, ensuring power consumption is reduced only when perceptual quality is maintained
2Use of energy by stationary object
If peak luminance is dynamically adjusted based on color and scene changes, then power consumption is reduced, but display quality may deteriorate
Solution Approach 1:
The patent carefully selects and thresholds parameter changes (color difference components Cr, Cb and luminance Y) to determine when peak luminance adjustment is appropriate. By setting minimum thresholds for detecting meaningful color and scene changes, the system ensures display quality is maintained while still achieving power consumption reduction through dynamic luminance adjustment
Solution Approach 2:
The feedback mechanism continuously monitors color and scene changes to determine when luminance adjustment should occur. This real-time feedback ensures that display quality is preserved by adjusting luminance only when necessary (i.e., when actual color or scene changes are detected), preventing quality deterioration while reducing power consumption during static or minimally changing displays
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 method reduces power consumption by up to 20.5% while maintaining display quality by dynamically adjusting luminance according to user perception of color and scene changes, as demonstrated in the driving results.
Implementation Method 1
an organic light emitting diode (OLED) display device uses an emissive electroluminescent layer to realize high contrast ratio and thin profile
Data Source
AI summary
An organic light emitting diode display device including: a timing controller that receives an image signal and a plurality of timing signals from an external system and output an image data, a gate control signal and a data control signal; a peak luminance controlling unit that calculates a peak luminance according to an average picture level of the image data and calculates a modified peak luminance by modifying the peak luminance according to one or more of a color change and a scene change of the image data; a gate driver that generates a gate signal using the gate control signal; a data driver that generates a data signal using the modified peak luminance, the image data and the data control signal; and a display panel that displays an image using the gate signal and the data signal.