Display Device Field Segmentation for Motion Artifact Reduction
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Solution Overview
Problem
High-speed driving methods in display devices lead to insufficient data programming and light emission, causing image quality deterioration and motion artifacts due to luminance differences between fields, especially in moving images.
Innovation Solution
A display device and driving method that divide one frame into two fields, with concurrent compensation, scan, and light emission periods for each field, ensuring non-overlapping and alternating connection and separation type light emission periods to reduce luminance differences and improve image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed driving with high driving frequency is used, then productivity is improved, but image quality deteriorates due to insufficient data programming and light emission
Solution Approach 1:
The frame is divided into two fields, with each field containing separate scan periods and light emission periods. This segmentation allows the display device to alternate between programming data for one field while emitting light for the other field, effectively doubling the light emission opportunities without increasing the overall frame rate, thus resolving the contradiction between high driving frequency and sufficient light emission time.
2Manufacturing precision
If light emissions are alternately driven for each field unit, then image quality deterioration is reduced, but resolution deterioration occurs in moving images due to luminance difference between light emitting pixels in each field
Solution Approach 1:
The patent implements a periodic action by dividing light emission into multiple periods within each field (first light emission period and second light emission period). This periodic structure ensures that pixels in both fields emit light multiple times during the frame cycle, maintaining consistent luminance levels and preventing resolution deterioration in moving images while still benefiting from alternating field-driven light emission.
Data Source
AI summary
A display device includes first pixels emitting light in a first field and second pixels emitting light in a second field. The first field includes a first compensation period during which threshold voltages of driving transistors of the first pixels are concurrently compensated, a first scan period during which scan signals corresponding to the first pixels are sequentially transmitted and corresponding data signals are programmed, and first light emission periods during which the first pixels concurrently emit light according to the data signals. The second field includes a second compensation period during which threshold voltages of driving transistors of the second pixels are concurrently compensated, a second scan period during which scan signals corresponding to the second pixels are sequentially transmitted and corresponding data signals are programmed, and second light emission periods during which the second pixels concurrently emit light according to the data signals.