Luminance Compensation for Free Sync Flickering
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Solution Overview
Problem
Display devices with free synchronization technology experience severe flickering due to luminance differences at varying refresh rates, which deteriorates the display of special images like those with frequencies randomly fluctuating around 60 Hz, causing a subjective effect deterioration.
Innovation Solution
A luminance compensation method that detects frequency variation patterns in frame queues and activates or deactivates a luminance compensation module based on preset conditions to relieve flickering, specifically by adjusting gamma voltage in frequency domains and turning the compensation on for frames with significant frequency alternations and off for stable frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If luminance compensation is performed by modifying grayscale data or adjusting voltage, then flickering problem is relieved and luminance difference at different frequencies is minimized, but display quality of special images with frequency randomly fluctuating around 60 Hz deteriorates significantly
Solution Approach 1:
The patent implements dynamic luminance compensation by continuously monitoring the actual refresh rate and adjusting compensation parameters in real-time based on frequency stability. The system transitions from static luminance compensation to a dynamic approach where compensation is applied adaptively - only when frequency instability is detected, and adjusted according to the degree of fluctuation. This resolves the contradiction by making the compensation system responsive to actual display conditions rather than applying fixed compensation universally.
Solution Approach 2:
The patent changes the parameter of luminance compensation intensity based on detected frequency patterns. When frequency randomly fluctuates around 60 Hz (special images), the system reduces or disables luminance compensation to maintain display quality. When frequency is stable at higher rates, normal luminance compensation is applied to eliminate flickering. This parameter adaptation resolves the contradiction by optimizing compensation levels for different operating conditions.
2Adaptability or versatility
If free synchronization technology is used to enable dynamic refresh rate control, then display adaptability to different frequencies is improved, but severe flickering occurs due to luminance differences between high and low frequencies
Solution Approach 1:
The patent introduces luminance compensation as an intermediary mechanism between the free synchronization technology and the display output. This intermediary layer detects frequency transitions and applies appropriate luminance adjustments to bridge the gap between different refresh rates, preventing the direct luminance differences that cause flickering. The compensation module acts as a mediator that allows frequency adaptability while maintaining luminance stability.
Solution Approach 2:
The patent implements a feedback loop where the actual refresh rate is continuously monitored and used to control luminance compensation. The system detects frequency transitions and feeds this information back to adjust luminance parameters accordingly. This closed-loop feedback mechanism ensures that luminance stability is maintained across different refresh rates enabled by free synchronization technology.
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 effectively reduces flickering and prevents luminance compensation from deteriorating special images by dynamically adjusting luminance compensation according to frequency patterns, maintaining stable and improved display quality.
Implementation Method 1
adjusting gamma voltage in frequency domains
Data Source
AI summary
The present application provides a luminance compensation method, a luminance compensation device, and a display device. Luminance compensation is performed on at least part of consecutive frames satisfying a condition of the luminance compensation, and the luminance compensation is not performed on the consecutive frames not satisfying the condition of the luminance compensation, thereby preventing a problem that the luminance compensation applied to a display device with free synchronization technology of traditional technology causing display of special images to deteriorate.