Organic EL Display Panel Peak Luminance Control
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Solution Overview
Problem
Existing methods for improving the life of organic EL display panels by controlling light emission characteristics fail to effectively reduce peak luminance without affecting visual perception or picture quality, and do not significantly extend the panel's reliability time or reduce power consumption.
Innovation Solution
A self-luminous display apparatus that calculates mean gradation values to detect specific conditions where a drop in peak luminance is not visually perceived, allowing for controlled reduction of peak luminance in a unit of one frame, thereby extending the panel's life and reducing power consumption without impacting image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the peak luminance of the display panel is reduced to extend the panel's life and reduce power consumption, then the reliability time increases and power consumption decreases, but the visual perception and picture quality may be affected
Solution Approach 1:
The patent applies dynamics by making the peak luminance controllable and variable in a unit of one frame based on video signal characteristics. The system dynamically adjusts peak luminance levels according to the actual content being displayed, allowing optimization of panel life and power consumption while maintaining visual quality when appropriate.
Solution Approach 2:
The patent changes the parameter of peak luminance from a fixed value to a variable parameter that can be adjusted based on video signal analysis. By monitoring mean gradation values and detecting specific conditions, the system modifies peak luminance parameters to extend panel life without significantly impacting visual perception.
2Use of energy by stationary object
If the peak luminance is reduced to reduce power consumption, then energy consumption decreases, but the brightness and visual quality may deteriorate
Solution Approach 1:
The system dynamically adjusts peak luminance based on real-time analysis of video signal characteristics. By making luminance control variable rather than fixed, the system can reduce power consumption during appropriate conditions while maintaining brightness when visual quality requires it.
Solution Approach 2:
The patent implements feedback by continuously monitoring mean gradation values of video signals and using this information to control peak luminance. The system detects specific conditions and adjusts luminance accordingly, creating a closed-loop control that optimizes power consumption while maintaining visual quality.
3Stability of the object's composition
If existing methods control light emission to prevent luminance drop, then luminance stability is improved, but the panel life is not significantly extended and power consumption is not reduced
Solution Approach 1:
Instead of maintaining constant peak luminance to prevent luminance drop, the patent inverts the approach by actively reducing peak luminance when conditions permit. This inverse strategy extends panel life and reduces power consumption while using visual perception characteristics to mask the reduction.
Solution Approach 2:
The patent changes the luminance control parameter from maintaining stability to enabling controlled reduction. By variable peak luminance control based on video signal characteristics, the system achieves both luminance stability (when needed) and life extension (when conditions allow).
Data Source
AI summary
A self-luminous display apparatus capable of varying a peak luminance of a display panel in a unit of one frame, which includes: a mean gradation value calculation section configured to calculate a mean gradation value of a video signal in a unit of a frame for each one frame; a specific condition detection section configured to detect, based on the mean gradation values calculated over a period of several frames, an input of the video signal which satisfies a specific condition in which a drop of a physical peak luminance is not likely to be perceived visually; and a light emission condition control section configured to perform dropping control of the peak luminance in a unit of a frame so that a dropping condition set in advance may be satisfied for a period of time after the frame which satisfies the specific condition is detected until the detection state is canceled.