Display Device Frame Frequency Adaptation Flicker Reduction
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Solution Overview
Problem
Display devices experience flicker due to variations in frame frequency, leading to fluctuations in luminance and compromised display quality.
Innovation Solution
Incorporating a frame frequency detector, data generator, and data driver to detect frame frequency variations and adjust image data signals accordingly, ensuring consistent luminance by expanding or reducing the frame period, thereby preventing flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frame frequency is varied according to rendering time, then the display device can adapt to different image processing requirements, but luminance fluctuations and flicker occur
Solution Approach 1:
The patent implements dynamic frame period expansion based on detected frame frequency variations. When frame frequency deviates from the reference frequency, the system dynamically expands the frame period proportionally to maintain luminance consistency. This dynamic adjustment mechanism allows the display device to adapt to varying rendering times while preventing luminance fluctuations and flicker, resolving the contradiction between adaptability and luminance stability.
2Illumination intensity
If the frame period is expanded to maintain luminance consistency, then flicker is reduced, but the display time for each frame increases
Solution Approach 1:
The patent changes the frame period parameter proportionally to the detected frame frequency deviation. By calculating the required expansion ratio based on the difference between actual and reference frame frequencies, the system adjusts the frame period parameter to maintain consistent luminance output. This parameter-based approach ensures that luminance consistency is achieved while minimizing the increase in frame display time, as the expansion is precisely calibrated to only what is necessary for flicker prevention.
Data Source
AI summary
A display device includes a frame frequency detector, a data generator, a data driver, and a plurality of pixels. The frame frequency detector is configured to detect a varied frame frequency to generate frame frequency information. The data generator is configured to receive an image signal and the frame frequency information, confirm an expanded frame period exceeding a reference frame period in one frame from the frame frequency information, and correct an image data signal corresponding to the image signal to correspond to a luminance changed according to the expanded frame period. The data driver is configured to output a data voltage corresponding to the image data signal. The plurality of pixels is configured to emit luminance corresponding to the data voltage. The reference frame period is a period in which the plurality of pixels is configured to emit light with a constant luminance corresponding to the data voltage.