FANNAL DISPLAY

 In projected capacitive touch panels, sensor architecture plays a key role in optical clarity, signal stability, manufacturing yield, and long‑term reliability. Two mainstream structures are widely used in industrial projects: SITO (Single ITO) DITO (Double ITO) Although both rely on the same capacitive sensing principle, their routing topology and manufacturing complexity are fundamentally different. These differences directly affect cost, yield, and application selection. This article provides a concise engineering‑level comparison to help select the right architecture for industrial use. Basic Concept A capacitive sensor consists of X‑axis and Y‑axis electrodes patterned from transparent conductive material (usually ITO). The key structural question is: Are X and Y electrodes routed on the same conductive layer, or on two separate layers? This defines SITO and DITO. Structural Definition SITO (Single ITO) X and Y electrodes are fabricated on one single ITO layer . Crossings req...

  A TFT display is often the first component blamed when the screen turns white, flickers, or shows abnormal colors. In reality, many display failures originate from signal integrity, power sequencing, optical assembly, or environmental stress rather than the panel itself. This article summarizes practical diagnostic logic used by field engineers and system integrators. The goal is not to list parameters, but to explain how to quickly locate the fault domain and avoid unnecessary panel replacement. 1. Start with Symptom Classification Before measuring anything, classify the visible symptom. This step alone eliminates many wrong directions. Typical categories: No image (white screen / black screen) Distorted image (lines, noise, unstable patterns) Brightness or color abnormality Temperature‑related failure Symptom classification defines whether the root cause is likely electrical, optical, or environmental. 2. Electrical & Signal Path Issues Common field symptoms Backlight on, i...

 In many display projects, brightness issues are diagnosed too quickly. When a screen becomes unreadable under sunlight, the immediate conclusion is usually simple: The panel is not bright enough. In practice, this conclusion is often wrong. Most brightness failures in industrial and outdoor displays are not caused by insufficient panel luminance, but by losses and limitations introduced after the panel leaves the supplier. Brightness is rarely a single-parameter problem. The Difference Between Panel Brightness and System Brightness LCD brightness is specified at the panel level, measured under controlled laboratory conditions. Once the panel is integrated into a real product, the light path becomes much more complex. Between the LED backlight and the user’s eyes, light passes through: Diffuser and prism films Polarizers Bonding layers Cover glass Surface coatings Each interface introduces absorption, reflection, or scattering. A panel rated at 1000 nit...