Defects & Troubleshooting
Mura, colour shift, blank vs white screen, ghosting and how to diagnose them. The following guides are written by our application engineers and backed by real module data.
LCD Backlight Flicker Fix: PWM Dimming Frequency and Dark Corners
Diagnose PWM backlight flicker and dark corners in industrial TFT LCDs: dimming frequency, LED binning, light-guide defects, and a concrete fix path.
2026-05-27 · Defects & Troubleshooting
LCD Color Cast & Gamma Debug: Fix Lost Color Steps
Diagnose LCD color cast and lost color steps: Gamma curve, VCOM, 18/24-bit RGB mismatch, and a step-by-step recalibration path for industrial TFT panels.
2026-02-15 · Defects & Troubleshooting
LCD Flicker-Free Dimming: PWM vs Analog for Cameras
Compare PWM, analog current and DC dimming for industrial LCDs: flicker thresholds, dimming ratio limits, camera rolling bands, and how to specify flicker-free backl…
2026-10-16 · Defects & Troubleshooting
Uneven LCD Brightness & Dark Corners: Backlight Mura Diagnosis
Isolate uneven brightness and dark corners on industrial TFT LCDs: light-guide placement, LED binning, bezel pressure, thermal gradients, driver current imbalance.
2026-10-16 · Defects & Troubleshooting
TFT Colour Shift and Gamma Distortion: Tuning for Wide-Angle vs Fixed-Direction Use
Why VA panels shift colour off-axis, how gamma tables and temperature drift affect industrial TFTs, and how to tune for kiosk or wide-angle use.
2026-10-16 · Defects & Troubleshooting
LCD Image Retention Burn-In: Root Cause & Fix
Why static HMI screens cause LCD image retention (not OLED burn-in), the pixel DC-bias mechanism, and engineering fixes: inversion, pixel shift, screensaver.
2023-10-08 · Defects & Troubleshooting
LCD Mura Defect: QC Test Method & Acceptance Criteria
Learn how to inspect LCD for mura: shadow vs light mura, test method, viewing angle, AQL and defect zones to specify with your TFT supplier.
2026-10-16 · Defects & Troubleshooting
CTP Touch Jumps or Dead Zones When the Display Is Fine
Diagnose capacitive touch jump and dead zone faults while the display works: noise coupling, cover-glass thickness, ESD, grounding, and firmware calibration.
2025-03-27 · Defects & Troubleshooting
LCD Vertical Line: Panel vs Driver Fault Guide
A local splash or vertical line on an LCD: how to separate TAB/COF and source-driver/TCON faults from real panel damage using swap and impedance tests.
2022-04-21 · Defects & Troubleshooting