Capacitive screen technology Character LCD Modules contact positioning possible

Contact positioning possible (All point addressable) technology can reach a multi-touch features, and can identify the exact position of the touch points can be said that the ideal multi-touch solutions, the iPhone is such touch technology . It is the main structure for the two conductive layers, one of which is the drive line (driving lines), another layer of sense lines (sensing lines), the two-tier line perpendicular to each other. The operation will take turns driving a drive line, and measure the sense line interlaced with this drive line a point capacitive coupling phenomenon. Scanned one by one can be informed of the exact position of the contacts.TFT LCD Display
However, to achieve such technology whether conductive layer planning, wiring, or the CPU, the difficulty is increased by many, we need a more powerful processor. IPhone, for example, it is based on two separate chips to share this work, a sensing controller, the original analog sensing signals to the XY axis coordinate; an ARM7 processor, designed to interpret these information, recognize finger movements and react accordingly. In addition, the complex contact positioning technology also faces some challenges on the design, such as the need to supply high voltage in order to get a better signal-to-noise ratio performance, not suitable for the use of large-size panels, which is the iPhone could not level 4.0 screen causes world.Character LCD Modules