SLVAFE4 june   2023 TLC6983

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Common issues in NPP Matrix LED Panel
    1. 2.1 Ghosting
    2. 2.2 Non-Uniformity in Low Gray Scale
    3. 2.3 Coupling
    4. 2.4 Caterpillar
    5. 2.5 Color Shift in Low Gray Scale
    6. 2.6 Gray Scale Gradient Discontinuity Issue
    7. 2.7 First Scan Line Dim
  6. 3Summary
  7. 4References

1 Introduction

With the pixel density getting higher in narrow pixel pitch (NPP) LED Display or Mini and Micro-LED products, the display performance is becoming a critical challenge. In narrow pixel pitch Matrix LED display, common issues including ghosting, non-uniformity in low gray scale, coupling between black/low brightness/high brightness, caterpillar caused by open LED or short LED, and first scan line dim and so on, highly influence the display performance. This application note describes the details about these issues and explains the root causes accordingly based on common cathode matrix LED display.