Display Panel Driving Method for Flicker Reduction and 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 can lead to deteriorated picture quality.
Innovation Solution
A method for variably controlling the light emitting period lengths within a one-field period, where multiple light emitting periods are divided, to create a luminance difference between them, ensuring the central light emitting period is visually distinct, thereby reducing motion artifacts and flickering, and allowing for wide-range peak luminance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light emitting period is shortened to reduce flickering, then flickering is suppressed, but the variation range of peak luminance is restricted and picture quality deteriorates
Solution Approach 1:
The patent divides the light emitting periods within one field period into multiple segments (first light emitting period and second light emitting period). By segmenting the light emitting periods and applying different luminance levels to each segment, the system can suppress flickering through shorter individual periods while maintaining wide peak luminance variation range through cumulative effect of multiple segments.
Solution Approach 2:
The patent applies different luminance characteristics to different light emitting period segments. The first light emitting period has different luminance level than the second light emitting period, creating local quality differences that allow flicker suppression in each segment while achieving overall luminance control across the field period.
2Object-affected harmful factors
If the light emitting period is shortened to reduce motion artifacts, then motion artifacts are suppressed, but peak luminance adjustment range is limited
Solution Approach 1:
By dividing the light emitting periods into multiple segments with different durations and luminance levels, the patent achieves motion artifact suppression through shorter individual segments while maintaining adjustable peak luminance through the combination of segments within the overall field period.
Solution Approach 2:
The patent dynamically adjusts the luminance levels and durations of different light emitting period segments to optimize both motion artifact suppression and peak luminance control. The driving section varies the light emitting period lengths adaptively to achieve the desired balance between artifact suppression and luminance range.
3Adaptability or versatility
If multiple light emitting periods are used within one field period, then peak luminance variation range increases, but flickering and motion artifacts increase
Solution Approach 1:
The patent segments multiple light emitting periods into distinct groups (first and second light emitting periods) with different luminance characteristics. This segmentation allows the system to utilize multiple periods for expanded luminance range while controlling flicker and motion artifacts through differentiated timing and luminance levels for each segment.
Solution Approach 2:
The patent employs asymmetric design in the light emitting period structure, where the first and second light emitting periods have different durations and/or luminance levels. This asymmetry allows multiple periods to contribute to peak luminance variation while the differentiated characteristics prevent uniform flickering patterns and reduce motion artifacts.
Data Source
AI summary
A display panel driving method for controlling the total light emitting period length within a one-field period includes placing a first light emission period, a second light emission period, and a third light emission period within the one-field period, and adjusting, in a state in which a period length from a starting timing of the first light emission period to an ending timing of the third light emission period is at least 25% and at most 75% of a one-field period length, a first no-light emission period between the first light emission period and the second light emission period and a second no-light emission period between the second light emission period and the third light emission period.