Because Simon phones only used touch screen interaction, completely abandoning physical button controls, this was quite bold at the time. Due to limitations in materials and the size of electronic components at the time, this phone was heavier than an ordinary phone. More importantly, as the main interaction method of this phone, its screen experience is quite poor. Due to the poor flexibility of glass, it is particularly difficult to use, and due to software optimization, sensors often malfunction, sometimes without a response for half a day. Although it is a touchscreen phone, the interaction mode still remains in the mindset of a button press. In the following decade, the mobile phone market was still dominated by button phones, and this situation continued until 2007.
And it was this year that Apple released its first generation smartphone. The iOS operating system it is equipped with has ushered in a new era for touchscreen phones, gradually replacing button phones with smart touchscreen phones. The first generation of Apple has adopted a capacitive touch screen on mobile phones, which is a four layer composite glass screen. The touch panel electrodes are located above the display panel, and there are optical elastic materials on both the top and bottom, using the human body’s current induction for operation. Due to our human body being a natural conductor, when our fingers come into contact with a capacitive screen, they form a coupling capacitor. At this time, a very small current in the human electric field will flow out to the electrodes at the four corners of the screen, centered around the touch point. The controller can calculate the relative position of the touch point and transmit instructions to the processor.
