Display Panel Driving Method for Peak Luminance Control
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Solution Overview
Problem
Existing display panel driving methods face challenges in adjusting peak luminance levels while minimizing flickering and motion artifacts, particularly when the light emitting period is short, as this restricts the variation range of peak luminance and degrades moving picture quality.
Innovation Solution
A method is proposed where the one-field period is divided into multiple light emitting periods, with the end timing of odd-numbered periods and start timing of even-numbered periods varied to control the total light emitting period length, narrowing the gap between light emitting periods from both directions, allowing for adjustable peak luminance without increasing flickering or motion artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light emitting period is made short to reduce motion artifacts, then motion artifact suppression is improved, but the variation range of peak luminance is restricted
Solution Approach 1:
The patent divides the single light emitting period into multiple sub-periods (first light emitting period and second light emitting period) within one field period. This segmentation allows the total light emitting duration to be kept short (reducing motion artifacts) while enabling multiple luminance levels to be displayed through different combinations and durations of the sub-periods (increasing peak luminance variation range).
Solution Approach 2:
The patent dynamically adjusts the durations of the first and second light emitting periods based on the required peak luminance level. By varying the time allocation between these periods, the system can achieve different peak luminance values while maintaining the overall short light emitting period, thus resolving the contradiction between motion artifact suppression and luminance variation capability.
2Object-affected harmful factors
If the light emitting period is made short to suppress flickering, then flickering suppression is improved, but the peak luminance adjustment range is limited
Solution Approach 1:
The patent segments the light emitting period into multiple controllable sub-periods, allowing the total emitting time to remain short (suppressing flickering) while enabling fine-grained control of luminance through different temporal distributions of the sub-periods (expanding peak luminance adjustment range).
Solution Approach 2:
The patent changes the temporal parameters (durations and timing) of the light emitting periods to achieve different peak luminance levels. By adjusting the duration allocation between multiple periods rather than relying on a single long period, the system achieves wide luminance adjustment while maintaining short total emission time for flickering suppression.
3Adaptability or versatility
If multiple light emitting periods are used to extend peak luminance range, then peak luminance variation is improved, but flickering may increase
Solution Approach 1:
The patent dynamically allocates time between multiple light emitting periods based on the desired peak luminance. By optimizing the temporal distribution—ensuring that the sum of period durations remains within a flickering-suppressing threshold while still allowing sufficient variation for peak luminance adjustment—the system achieves both goals simultaneously.
Solution Approach 2:
The patent maintains continuous light emitting action across the multiple periods without introducing harmful interruptions or excessive gaps. The light emitting periods are arranged to provide continuous illumination throughout the field period, ensuring that the total emitting time remains short enough to suppress flickering while still enabling multiple luminance levels through temporal distribution.
Data Source
AI summary
In the present invention, there is provided a display panel driving method of the type wherein the total light emitting period length within a one-field period is controlled to variably control the peak luminance level of a display panel, including the step of: variably controlling, where the one-field period has N light emitting periods, N being equal to or greater than 2, the end timing of the ith light emitting period and the start timing of the i+1th light emitting period so as to satisfy the total light emitting period length within the one-field period, i being an odd number which satisfies 1≦i≦N−1 while i+1 satisfies 2≦i+1≦N.