Organic Light Emitting Display Timing Control for Motion Picture Response Time
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Solution Overview
Problem
Organic light emitting display apparatuses face issues with motion picture response time (MPRT) delays, leading to unclear images due to luminance deviations between pixels caused by threshold voltage and mobility variations in driving transistors, which existing compensation methods fail to fully address.
Innovation Solution
The apparatus outputs black gate pulses and sensing gate pulses in a vertical blank period, with differently set timings for sensing gate pulses after black gate pulses, to compensate for pixel variations and improve image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If black image mode is used to improve motion picture response time, then MPRT is improved, but the complexity of signal timing control increases
Solution Approach 1:
The patent implements dynamic timing adjustment by differently setting the timing of sensing gate pulses relative to black gate pulses for different gate lines. This dynamic timing control allows the system to adapt to varying pixel characteristics while maintaining the black image mode's fast response benefit, thus improving MPRT without excessive complexity increase
Solution Approach 2:
The patent segments the gate lines into different groups with different timing arrangements. By dividing the gate lines and applying different sensing pulse timing to different segments, the system can compensate for pixel variations more effectively while managing the timing control complexity through structured segmentation
2Measurement precision
If sensing image data voltages and black image data voltages are output in vertical blank period, then pixel variations are compensated, but the timing coordination complexity increases
Solution Approach 1:
The patent performs sensing operations during the vertical blank period before the next image display begins. By conducting pixel variation measurement in advance during the blank period when no image data is being displayed, the system can compensate for pixel variations without interfering with normal image output timing
Solution Approach 2:
The patent utilizes the periodic vertical blank period between frame displays to perform sensing operations. This periodic timing allows the system to regularly compensate for pixel variations at predetermined intervals without disrupting the continuous image display, thereby coordinating multiple voltage outputs systematically
Data Source
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AI summary
Disclosed is an organic light emitting display apparatus. The organic light emitting display apparatus outputs black gate pulses for a black image (BI) and sensing gate pulses for sensing in a vertical blank period (C) and differently sets timings, at which the sensing gate pulses are output after the black gate pulses are output, for each gate line.