This document describes the features and characteristics of NextWindow's LCD In-Cell Touch products. The products are optical touchscreens, suitable for Windows-7 consumer monitors, all-in-one computers, and large-format display applications.
This document presents NextWindow’s analysis of optical touch technologies for LCD panels. It describes three physical integration methods—In‑Cell, Out‑Cell and On‑Cell—detailing how touch sensors are incorporated within or on the LCD stack and the associated manufacturing considerations.
The paper also compares six touch sensing technologies (light‑sensing, voltage‑sensing, charge‑sensing, projected‑capacitive, resistive, and optical) and summarizes their major advantages and flaws, providing a concise reference for designers evaluating touch solutions for monitors, all‑in‑one PCs and large‑format displays.
The methods are In‑Cell (sensor inside the LCD cell), Out‑Cell (sensor laminated on top of the LCD), and On‑Cell (sensor on the top or bottom of the color‑filter substrate).
Projected Capacitive touch technology offers multi‑touch with finger‑only operation.
Analog resistive touch technology’s major advantage is low cost.