Display Panel Control Device for Flicker Suppression
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Solution Overview
Problem
Conventional display devices experience flicker phenomena due to variable frame periods caused by GPU processing power, leading to mismatched light emission and extinction timings.
Innovation Solution
A display panel control device that includes a data storing unit, synchronization control unit, and duty control unit, which temporarily stores video image signals and adjusts light emission and extinction periods to maintain a constant duty ratio, even with varying frame periods, by incorporating a video image period and an extended period within the frame period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame period is set to be constant, then the display timing can be predetermined, but the light emission timing does not match the actual display timing when GPU processing power varies, causing flicker
Solution Approach 1:
The patent divides the frame period into a fixed video image period and a variable extended period. The video image period maintains constant timing for accurate display, while the extended period dynamically adjusts to accommodate GPU processing variations, resolving the contradiction between timing accuracy and flexibility.
Solution Approach 2:
The frame period is segmented into two distinct parts: the video image period (fixed duration for display timing) and the extended period (variable duration for processing flexibility). This segmentation allows each part to optimize for its specific function, eliminating flicker while maintaining productivity.
2Adaptability or versatility
If the frame period varies depending on GPU processing power, then processing flexibility is improved, but the duty ratio varies causing mismatched light emission timing and flicker
Solution Approach 1:
The extended period dynamically adjusts its duration based on GPU processing requirements while the video image period remains fixed. This dynamic structure allows the system to adapt to varying processing loads without compromising light emission timing accuracy during the critical video image period.
Solution Approach 2:
By segmenting the frame period into fixed and variable portions, the patent enables the video image period to maintain reliable timing for light emission while the extended period provides the necessary adaptability for different processing scenarios.
3Illumination intensity
If the light emission period is extended to improve brightness, then the duty ratio increases, but the initialization period may be insufficient causing display artifacts
Solution Approach 1:
The initialization operation is performed preliminarily within the fixed video image period before the extended period begins. This ensures that pixel circuits are fully initialized with precise timing regardless of how long the extended period lasts, preventing display artifacts while allowing flexible brightness control.
Solution Approach 2:
The system dynamically separates the initialization function (fixed timing in video image period) from the light emission duration (extended period). This allows the light emission period to be extended for brightness improvement without compromising initialization precision.
Data Source
AI summary
A control device includes a data storing unit, a synchronization control unit, and a duty control unit. The synchronization control unit starts a frame period when a vertical synchronization signal is received. The frame period includes a video image period and an extended period. The synchronization control unit initializes pixel circuits within a predetermined period after the reception of the vertical synchronization signal, temporarily stores the video image signal in the data storing unit after the reception of the vertical synchronization signal, and supplies the video image signal from the data storing unit to a display panel after the initialization and during the video image period. The duty control unit causes the display panel to emit light after the initialization and during the video image period, and controls the display panel such that the display panel emits and extinguishes light at a predetermined duty ratio during the extended period.