How does surface capacitive touch technology drive a new revolution in human-machine interfaces? （1） 1

Capacitive touch technology offers users multiple advantages compared to the traditional resistive touch technology currently dominating the market, including: a penetration rate of up to 97% and more authentic color presentation for enhanced visual enjoyment; the ability to activate touch functions with a simple tap or even without physical contact with the screen, providing users with more effortless and flexible control; and a significantly longer lifespan, with capacitive screens lasting approximately 200 million touch cycles—200 times that of four-wire resistive screens (1 million cycles) and five times that of five-wire resistive screens (40 million cycles).  diode

The signals detected by capacitive touch technology originate from minute changes caused by touch. Depending on their working principles, they can be broadly categorized into surface capacitive touch technology (SCT) and projected capacitive touch technology (PCT). The former is commonly used in large outdoor applications, such as public information platforms (POI) and public service (sales) platforms (POS), while the latter gained widespread attention due to the multi-touch mobile phone iPhone introduced by Apple.  diode

From the perspective of the development process of touch technology, the earliest market to adopt this technology was the industrial control sector. The goal was to consolidate complex and large-area mechanical equipment control panels into a single-window, multi-tabbed screen interface, utilizing medium-to-large-sized resistive screens at the time. However, the shortcomings of resistive screens—such as insufficient lifespan and durability—were simply inadequate for industrial control applications. Consequently, as soon as medium-to-large-sized surface capacitive touch (SCT) screens emerged, high-end equipment immediately switched to the SCT solution.  By around 2003, as the manufacturing costs of resistive screens decreased, smaller-sized screens began to be applied in portable devices like PDAs and GPS units, marking the official entry of touch technology into the consumer market. In 2006, the iPhone introduced a small-sized projective capacitive touch (PCT) screen, leveraging its exceptional optical properties and multi-touch functionality to spark a trend, becoming one of the most remarkable touch technologies in recent years.