New choice piezoelectric touch resistive, capacitive Character LCD Modules

Currently, resistive and capacitive touch is more mainstream types of touch technology. Resistive design is simple, lowest cost, is currently the most important touch technology. Resistive touch more constrained by their physical limitations, such as lower light transmittance, large detection area of ​​the high number of lines caused by the burden on the processor, the application features to make it easy to aging which could affect the service life and other issues. Thus, in the high-end applications, the capacitive touch technology to become the first choice. Capacitive touch support multi-touch features, has a higher transmission rate, lower overall power consumption, high hardness of the contact surface, without pressing, longer service life.20x2 oled
However, the capacitive touch also have their own problems to overcome: as in the integrated module, the LCD screen and indium the model tin oxide (ITO) is done in a vacuum in the stack, in order to achieve the efficacy of contact detection, ITO template required constantly scans the pixels, which distributing the interference signal will continue to affect the entire operation of the module. In addition, in order to prevent the surface of the ITO current isolated, hardened coating is generally very thin, if the external force is exerted on the touch screen is too large, may hurt ITO, and therefore reduced life. In addition, the cost of the capacitive touch panel is still relatively high, relatively difficult in large size applications.character oled display
Piezoelectric touch closer to the power consumption characteristics of the capacitive touch characteristics, i.e. without the operation of the touch, do not produce the power consumption, the resistive moment generating power consumption. Piezoelectric touch interface supports also supports serial, I2C and USB interfaces. Algorithm Sitronix has built-in driver IC motion recognition algorithm, which will greatly ease the burden on the client software and an external processor. Qian Jin said that the cost of the process from the point of view, a resistive touch-control program to go to the the piezoelectric touch control process need to change the production line equipment, combined with a capacitive ITO and mask process, the piezoelectric touch control process The cost of approximately 80-90%.