Touch screen technology has brought tremendous changes to the consumer electronics field. The interface of the device has become more user-friendly and easy to use. The physical touch can be converted into a digital code with a light touch of a finger. The new man-machine interface introduces new product concepts and innovates the structural design of 3C products. Under the concept of modular design, system integration creativity allows system designers to activate product system design creativity. The introduction of new technologies has driven the reorganization and transposition of the entire upstream and downstream industrial chain.
It is foreseeable that with the rapid development of touch screen technology, touch screens will play an important role in the popularization and utilization of computer technology. The application fields of touch screens will become wider and wider, and the performance will get better and better. Understanding the development trend of touch screen technology is very necessary for the correct development of touch screen products. The development trend of touch screen technology is:
1) Resistive touch screen is still the mainstream in the market. Although the service life of resistive touch screens is not very long and the transmittance is not good, it is the most commonly used touch screen technology on the market. Its low price and good response to fingers and touch pens make it the most sold touch screen product in the past 5 years.
In terms of current market development, resistive touch screens have price advantages. Among them, Samsung and LG's new full-screen touch phones almost all use resistive touch screens. However, this situation may change in the next few years. Projected capacitive and infrared touch screens have also begun to penetrate the wireless handheld device market in 2007.
2) The price gap between capacitive and resistive touch screens is narrowing. Although capacitive touch screen technology has been promoted due to the launch of the iPhone, its application is not limited to touch screens for small-sized handheld devices, but also in PC-related fields such as mice and keyboards, and even home appliances , Kiosk, and various applications related to life make capacitive touch more in line with the needs of future electronic products. Due to the wider application range, capacitive touch screen technology is widely favored. It is believed that capacitive touch will replace resistive touch and become the mainstream of small-size panel applications.
iPhone's multi-touch abandons the traditional resistive touch and adopts the Pro-jective Capacitive technology in the capacitive touch screen technology, which means that the capacitive touch screen has higher light transmittance and superior color performance. Effect.
3) The technical characteristics of the panel will affect its most suitable application. As far as touch screen technology is concerned, the so-called most suitable applications have to be discussed from two perspectives: application category and usage context. As long as there is a place where the screen is used as the output, basically the external touch screen can be used as input. However, from the perspective of application categories, touch screens can be basically divided into consumer, industrial and medical applications. Handwriting, pen writing, multi-finger, multi-person and environmental adaptability are the main considerations, so the most suitable application is bound to have structural changes.
4) Compared with the original method of installing a touch screen panel on an LCD panel, research on integrating the function of the touch screen panel with the LCD panel is becoming more and more popular. If the original external touch screen panel components can be integrated with the liquid crystal panel, it will be possible to achieve a thinner and lighter panel. In addition, in the original method of externally placing the touch screen panel on the LCD screen, there is a physical space between the LCD screen and the touch screen panel. Therefore, external light will be reflected between the LCD panel and the touch screen panel, resulting in bright environments such as outdoors. The visibility underneath is reduced. If the external touch screen panel components can be integrated, the decrease in visibility outdoors can be suppressed.
The integration of touch screen panel and liquid crystal panel includes "In-cell" method and "On-cell" method. In-cell refers to the method of embedding touch screen panel functions into liquid crystal pixels. On-cell refers to the method of embedding the touch screen panel function between the color filter substrate and the polarizing plate.
