Drive Circuit Scanning Timing for Display Region Continuity
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Solution Overview
Problem
Higher resolution displays lead to insufficient timing margin due to wiring transient, causing image defects and discontinuity at the juncture of divided display regions, resulting in deteriorated image quality.
Innovation Solution
A drive circuit with a scanning circuit that performs first and second vertical scanning on adjacent display regions, where the timing of starting light emission in the second region is later than the ending light emission in the first region, preventing overlap of light emission periods and ensuring continuous image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display region is divided into two regions and vertical scanning is performed for each divided region, then the transition speed of vertical scanning is reduced to half, but image discontinuity occurs at the juncture of divided regions due to timing overlap, leading to deteriorated image quality
Solution Approach 1:
The patent applies preliminary action by performing the light extinction scanning (second vertical scanning) in advance before the light emission scanning (first vertical scanning) in the adjacent display region. Specifically, the scanning circuit executes the second vertical scanning on the lower display region to extinguish light, then subsequently performs the first vertical scanning on the upper display region to emit light. This sequential timing arrangement ensures that light emission periods do not overlap at the juncture of divided regions, preventing image discontinuity while maintaining the benefits of divided region scanning.
2Manufacturing precision
If higher resolution is implemented, then display definition is improved, but timing margin becomes insufficient due to wiring transient, causing image defects
Solution Approach 1:
The patent applies segmentation by dividing the display region into multiple independent scanning zones (upper and lower display regions). Each region is scanned separately with dedicated timing control, allowing the system to manage wiring transient issues on a regional basis rather than across the entire display. This segmentation enables higher resolution displays to maintain adequate timing margins by reducing the scanning distance and complexity within each divided region.
Data Source
AI summary
Provided is a drive circuit that includes a scanning circuit configured to perform a first vertical scanning and a second vertical scanning on each of first and second display regions, adjacent to each other in a vertical direction in a display region including pixels, individually in one frame. The first vertical scanning causes light emission of each pixel to be performed, and the second vertical scanning causes light extinction of each pixel to be performed. The scanning circuit is configured to perform the first vertical scanning and the second vertical scanning to cause timing of starting the light emission of an n+1th frame for a first scanned row, adjacent to the first display region, in the second display region to be later than timing of ending the light emission of an n-th frame for a final scanned row, adjacent to the second display region, in the first display region.